WO1998027805A1 - Antimicrobial proteins - Google Patents

Abstract

A new family of antimicrobial proteins is described. Prototype proteins can be isolated from Macadamia integrifolia as well as other plant species. DNA encoding the protein is also described as well as DNA constructs which can be used to express the antimicrobial protein or to introduce the antimicrobial protein into a plant. Compositions comprising the antimicrobial proteins or the antimicrobial protein per se can be administered to plants or mammilian animals to combat microbial infestation.

Description

ANTIMICROBIAL PROTEINS TECHNICAL FIELD This invention relates to isolated proteins which exert inhibitory activity on the growth of fungi and bacteria, which fungi and bacteria include some microbial pathogens of plants and animals. The invention also relates to recombinant genes which include sequences encoding the proteins, the expression products of which recombinant genes can contribute to plant cells or cells of other organism's defence against invasion by microbial pathogens. The invention further relates to the use of the proteins and/or genes encoding the proteins for the control of microbes in human and veterinary clinical conditions. BACKGROUND ART

Microbial diseases of plants are a significant problem to the agricultural and horticultural industries. Plant diseases in general cause millions of tonnes of crop losses annually with fungal and bacterial diseases responsible for significant portions of these losses. One possible way of combating fungal and bacterial diseases is to provide transgenic plants capable of expressing a protein or proteins which in some way increase the resistance of the plant to pathogen attack. A simple strategy is to first identify a protein with antimicrobial activity in vitro, to clone or synthesise the DNA sequence encoding the protein, to make a chimaeric gene construct for efficient expression of he protein in plants, to transfer this gene to transgenic plants and to assess the effect of the introduced gene on resistance to microbial pathogens by comparison with control plants. The first and most important step in the strategy for disease control described above is to identify, characterise and describe a protein with strong antimicrobial activity. In recent years, many different plant proteins with antimicrobial and/or antifungal activity have been identified and described. These proteins have been categorised into several classes according to either their presumed mode of action and/or their amino acid sequence homologies. These classes include the following: chitinases (Roberts, W.K. et al. [1986] Biochim. Biophys. Ada 880:161-170); β-1,3- glucanases (Manners, J.D. et al. [1973] Phytochemistry 12:547-553); thionins (Bolmann, H. et al. [1988] EMBO J. 7: 1559-1565 and Fernadez de Caleya, R. et al. [1972] Appl. Microbiol. 23:998- 1000); permatins (Roberts, W. K. et al. [1990] J. Gen. Microbiol. 136:1771-1778 and Vigers, A.J. et al. [1991] Mol. Plant-Microbe fnteract. 4:315-323); ribosome-inactivating proteins (Roberts, W. K. et al. [1986] Biochim. Biophys. Ada 880:161-170 and Leah, R. et al. [1991] J. Biol. Chem.

266: 1564-1573); plant defensins (Terras, F. R. G. et al. [1995] The Plant Cell 7:573-588); chitin binding proteins (De Bolle, M.F.C. et al. [1992] Plant Mol. Biol. 22:1187-1 190 and Van Parijs, J. et al. [1991] Planta 183:258-264); thaumatin-like, or osmotin-like proteins (Woloshuk, C.P. et al. [1991] The Plant Cell 3:619-628 and Hejgaard, J. [1991] FEBS Letts. 291 : 127-131); PRl-type proteins (Niderman, T. et al. [1995] Plant Physiol. 108: 17-27.) and the non-specific lipid transfer proteins (Terras, F.R.G. et al. [1992] Plant Physiol. 100:1055-1058 and Molina, A. et al. [1993] FEBS Letts. 3166: 1 19-122). Another class of antimicrobial proteins from plants is the knottin or knottin-like antimicrobial proteins (Cammue, B.P.A. et al. [1992] J. Biol. Chem. 67:2228-2233; Broekaert W.F. et al. (1997) Cήt. Rev. in Plant Sci. 16(3):297-323). A class of antimicrobial proteins termed 4-cysteine proteins has also been reported in the literature which class includes Maize Basic Protein (MBP-1) (Duvick, J.P. et al. [1992] J. Biol. Chem. 267: 18114-18120). A novel antimicrobial protein which does not fit into any previously described class of antimicrobial proteins has also been isolated from the seeds of Macadamia integrifolia termed MiAMPl (Marcus, J.P. et al. [1997] Eur. J. Biochem. 244:743-749). In addition, plants are not the sole source of antimicrobial proteins and there are many reports of the isolation of antimicrobial proteins from animal and microbial cells (reviewed in Gabay, J.E. [1994] Science 264:373-374 and in "Antimicrobial peptides" [1994] CfBA Foundation Symposium 186, John Wiley and Sons Publ., Chichester, UK).

There is evidence that the ectopic expression of genes encoding proteins that have in vitro antimicrobial activity in transgenic plants can result in increased resistance to microbial pathogens. Examples of this engineered resistance include transgenic plants expressing genes encoding: a plant chitinase, either alone (Broglie, K. et al. [1991] Science 254:1194-1197) or in combination with a β- 1 ,3-glucanase (Van den Elzen, P.J.M. et al. [1993] Phil. Trans. Roy. Soc. 342:271-278); a plant defensin (Terras, F.R.G. et al. [1995] The Plant Cell 7:573-588); an osmotin-like protein (Liu, D. et al. [1994] Proc. Nail. Acad. Sci. USA 91 :1888-1892); a PRl-class protein (Alexander, D. et al.

[1993] Proc. Natl. Acad. Sci. USA 90:7327-7331) and a ribosome-inactivating protein (Logemann, J. et al. [1992] Bio/Technology 10:305-308).

Although the potential use of antimicrobial proteins for engineering disease resistance in transgenic plants has been described extensively, there are other applications which are worthy of mention. Firstly, highly potent antimicrobial proteins can be used for the control of plant disease by direct application (De Bolle, M.F.C. et al. [1993] in Mechanisms of Plant Defence Responses, B. Fritig and M. Legrand eds., Kluwer Acad. Publ., Dordrecht, NL, pp. 433-436). In addition, antimicrobial peptides have potential therapeutic applications in human and veterinary medicine. Although this has not been described for peptides of plant origin it is being actively explored with peptides from animals and has reached clinical trials (Jacob, L. and Zasloff, M. [1994] in

"Antimicrobial Peptides", CfBA Foundation Symposium 186, John Wiley and Sons Publ., Chichester, UK, pp. 197-223).

Antimicrobial proteins exhibit a variety of three-dimensional structures which will determine in large part the activity which they manifest. Many of the global structures exhibited by these proteins have been determined (Broekaert W.F. et al. (1997) Crit. Rev. in Plant Sci. 16(3):297-323). A large factor in determining the stability of these proteins is the presence of disulfide bridges between various cysteines located in α-helical and β-sheet regions. Many peptides with toxic activity such as conotoxin are well known to be stabilized by disulfide bridges (see for example Hill, J.M. et al. (1996) Biochemistry 35(27): 8824-8835). In the case of the conotoxin referenced above, a compact structure is formed consisting of a helix, a small -hairpin, a cis-hydroxyproline, and several turns. The molecule is stabilized by three disulfide bonds, two of which connect the α-helix and the β-sheet, forming a solid structural core. Interestingly, eight arginine and lysine side chains in this molecule project into the solvent in a radial orientation relative to the core of the molecule. These cationic side chains form potential sites of interaction with anionic sites on pathogen membranes (Hill, J.M. et al. supra).

The invention described herein constitutes previously undiscovered and thus novel proteins with antimicrobial activity. These proteins can be isolated from Macadamia integrifolia (Mi) seeds or from cotton or cocoa seeds. In addition, protein fragments which are antifungal can be derived from larger seed storage proteins containing regions of substantial similarity to the antimicrobial proteins from macadamia described here. Examples of seed storage proteins which contain regions similar to the proteins which have been purified can be seen in Figure 4. Macadamia integrifolia belongs to the family Proteaceae. M. integrifolia, also known as Bauple Nut or Queensland Nut, is considered by some to be the world's best edible nut. Cotton (Gossypium hirsutum) belongs to the family Malvaceae and is cultivated extensively for its fiber. Cocoa (Threobroma cacao) belongs to the family Sterculiaceae and is used around the world for a wide variety of cocoa products.

The fact that both the macadamia and cocoa antimicrobial proteins are found in edible portions of these plants makes these peptides attractive for use in genetic engineering for disease resistance since trangenic plants expressing these proteins are unlikely to show added toxicity. Proteins may also be safe for human and veterinary use.

SUMMARY OF THE INVENTION According to a first embodiment of the invention, there is provided a protein fragment having antimicrobial activity, wherein said protein fragment is selected from:

(i) a polypeptide having an amino acid sequence selected from: residues 29 to 73 of SEQ ID NO: 1 residues 74 to 1 16 of SEQ ID NO: 1 residues 1 17 to 185 of SEQ ID NO: 1 residues 186 to 248 of SEQ ID NO: 1 residues 29 to 73 of SEQ ID NO: 3 residues 74 to 116 of SEQ ID NO: 3 residues 117 to 185 of SEQ ID NO: 3 residues 186 to 248 of SEQ ID NO: 3 residues 1 to 32 of SEQ ID NO: 5 residues 33 to 75 of SEQ ID NO: 5 residues 76 to 144 of SEQ ID NO: 5 residues 145 to 210 of SEQ ID NO: 5 residues 34 to 80 of SEQ ID NO: 7 residues 81 to 140 of SEQ ID NO: 7 residues 33 to 79 of SEQ ID NO: 8 residues 80 to 1 19 of SEQ ID NO: 8 residues 120 to 161 of SEQ ID NO: 8 residues 32 to 91 of SEQ ID NO: 21 residues 25 to 84 of SEQ ID NO: 22 residues 29 to 94 of SEQ ID NO: 24 residues 31 to 85 of SEQ ID NO: 25 residues 1 to 23 of SEQ ID NO: 26 residues 1 to 17 of SEQ ID NO: 27 residues 1 to 28 of SEQ ID NO: 28; (ii) a homologue of (i);

(iii) a polypeptide containing a relative cysteine spacing of C-2X-C-3X-C-(10-12)X-C-3X-

C-3X-C wherein X is any amino acid residue, and C is cysteine; (iv) a polypeptide containing a relative cysteine and tyrosine/phenylalanine spacing of Z- 2X-C-3X-C-(10-12)X-C-3X-C-3X-Z wherein X is any amino acid residue, and C is cysteine, and Z is tyrosine or phenylalanine;

(v) a polypeptide containing a relative cysteine spacing of C-3X-C-( 10- 12)X-C-3X-C wherein X is any amino acid residue, and C is cysteine; (vi) a polypeptide with substantially the same spacing of positively charged residues relative to the spacing of cysteine residues as (i); and (vii) a fragment of the polypeptide of any one of (i) to (vi) which has substantially the same antimicrobial activity as (i). According to a second embodiment of the invention, there is provided a protein containing at least one polypeptide fragment according to the first embodiment, wherein said polypeptide fragment has a sequence selected from within a sequence comprising SEQ ID NO: 1, SEQ ID NO: 3 or SEQ ID NO: 5.

According to a third embodiment of the invention, there is provided a protein having a sequence selected from SEQ ID NO: 1, SEQ ID NO: 3 or SEQ ID NO: 5. According to a fourth embodiment of the invention, there is provided an isolated or synthetic

DNA encoding a protein according to the first embodiment

According to a fifth embodiment of the invention, there is provided a DNA construct which includes a DNA according to the fourth embodiment operatively linked to elements for the expression of said encoded protein. According to a sixth embodiment of the invention, there is provided a transgenic plant harbouring a DNA construct according to the fifth embodiment.

According to a seventh embodiment of the invention, there is provided reproductive material of a transgenic plant according to the sixth embodiment.

According to an eighth embodiment of the invention, there is provided a composition comprising an antimicrobial protein according to the first embodiment together with an agriculturally-acceptable carrier diluent or excipient.

According to a ninth embodiment of the invention, there is provided a composition comprising an antimicrobial protein according to the first embodiment together with an pharmaceutically- acceptable carrier diluent or excipient. According to a tenth embodiment of the invention, there is provided a method of controlling microbial infestation of a plant, the method comprising: i) treating said plant with an antimicrobial protein according to the first embodiment or a composition according to the eighth embodiment; or ii) introducing a DNA construct according to the fifth embodiment into said plant. According to an eleventh embodiment of the invention, there is provided a method of controlling microbial infestation of a mammalian animal, the method comprising treating the animal with an antimicrobial protein according to the first embodiment or a composition according to the ninth embodiment.

According to a twelfth embodiment of the invention, there is provided a method of preparing an antimicrobial protein, which method comprises the steps of: a) obtaining or designing an amino acid sequence which forms a helix-tum-helix structure; b) replacing individual residues to achieve substantially the same distribution of positively charged residues and cysteine residues as in one or more of the amino acid sequences shown in Figure 4; c) synthesismg a protein comprising said ammo acid sequence chemically 01 by lecombmant DNA techniques m liquid cultuie, and d) if necessaiy, forming disulphide linkages between said cysteine lesidues

Othei embodiments of the invention include methods for producing antimici obial piotem BRIEF DESCRIPTION OF THE DRAWINGS

Figuie 1 shows the results of cation-exchange chromatography of the basic piotem fraction of a Macadamia integrifolia extract with the results of a bioassay foi antimici obial activity shown foi fractions in the legion of MιAMP2c elution

2+ Figure 2 shows the results of including 1 mM Ca in a parallel bioassay of fractions from the cation-exchange sepai ation

Figuie 3 shows a reverse-phase HPLC profile of highly inhibitory fractions containing

MιAMP2c from the cation-exchange separation in Figure 1 and 2 together with % growth inhibition exhibited by the HPLC fractions

Figuie 4 shows the ammo acid sequences of MιAMP2a, b, c and d and piotem fiagments deiived fiom othei seed storage proteins which contain regions of homology to the MιAMP2 senes of antimici obial piotems

Figuie 5 shows an example of a synthetic nucleotide sequence which can be used for the expression and secietion of MιAMP2c m transgenic plants

Figure 6 shows the alignment of clones 1 -3 from macadamia containing MιAMP2a, b, c and d subunits together with sequences from cocoa and cotton vicilm seed storage pioteins which exhibit significant homology to the macadamia clones

Figuie 7 displays a series of secondary structure piedictions for MιAMP2c

Figuie 8 shows a thi ee-dimensional model of the MιAMP2c protein

Figure 9 shows stained SDS-PAGE gels of protein fractions at various stages m the expression and purification of TcAMPl(Theobroma cacao subunit 1), MιAMP2a, MιAMP2b, MιAMP2c and

MιAMP2d expressed in E colt liquid culture

Figure 10 shows the leverse-phase HPLC purification of cocoa subunit 2 (TcAMP2) after the initial punfication step using Ni-NTA media

Figure 1 1 shows a western blot of crude protein extracts from various plant species using rabbit antiserum raised to MιAMP2c

Figuie 12 shows a cation-exchange fractionation of the Stenocarpus stnuatus basic protein fi action along with the accompanying western blot which shows the presence of immunologically- related proteins in a lange of fi actions Figure 13 shows a reverse-phase HPLC separation of Stenocarpus sinuatus cation-exchange fractions which had previously reacted with MiAMP2c antibodies (see Figure 14). A western blot is also presented which reveals the presence of putative MiAMP2c homologues in individual HPLC fractions. Figure 14 is a map of the binaiy vector pPCV91 -MiAMP2c as an example of a vector that can be used to express these antimicrobial proteins in transgenic plants.

Figure 15 shows a western blot to detect MiAMP2c expressed in transgenic tobacco plants. BEST MODE AND OTHER MODES FOR CARRYING OUT THE INVENTION The following abbreviations are used hereafter: EDTA ethylenediaminetetraacetic acid

IPTG Isopropyl- β-D-thiogalactopyranoside

MeCN methyl cyanide (acetonitrile)

Mi Macadamia integrifolia

MiAMP2 Macadamia integrifolia antimicrobial protein series number 2 Ni-NTA Nickel-nitrilotriacetic acid chromatography media

ND not determined

PCR polymerase chain reaction

PMSF phenylmethylsulphonyl fluoride

SDS-PAGE sodium-dodecylsulphate polyacrylamide gel electrophoresis TFA trifluoroacetate

The term homologue is used herein to denote any polypeptide having substantial similarity in composition and sequence to the polypeptide used as the reference. The homologue of a reference polypeptide will contain key elements such as cysteine or other residues spaced at identical intervals such that a substantially similar three-dimensional global structure is adopted by the homologue as compared to the reference. The homologue will also exhibit substantially the same antimicrobial activity as the reference protein.

The present inventors have identified a new class of proteins with antimicrobial activity. Prototype proteins can be isolated from seeds oi Macadamia integrifolia. The invention thus provides antimicrobial proteins per se and also DNA sequences encoding these antimicrobial proteins.

The invention also provides amino acid sequences of proteins which are homologous to the prototype antimicrobial proteins from Macadamia integrifolia. Thus, in addition to the antimicrobial proteins from Macadamia, this invention also provides amino acid sequences of homologues from other species which have hitherto been unrecognized as having antimicrobial activity. While the first antimicrobial protein in the present series was isolated directly from Macadamia integrifolia, additional antimicrobial proteins were identified through cloning efforts, homology searches and subsequent antimicrobial testing of the encoded proteins after expression in and purification from liquid culture. After the first protein from this series was purified from macadamia and termed MiAMP2, clones were obtained which encoded a preproprotein containing MiAMP2. This large protein (666 amino acids), represented by several almost identical clones, contained four adjacent regions with significant similarity to the purified antimicrobial protein fragment (MiAMP2) which itself was found to lie within region three in the cloned nucleotide sequence; hence the purified antimicrobial protein is termed MiAMP2c. Other fragments contained in the 666-amino-acid clone are termed MiAMP2a, b and d as per their locations in the cloned nucleotide sequence. Several other sequences with significant homology to the MiAMP2a, b, c, and d protein fragments were then identifed in the Entrez data base. These homologous sequences were contained within larger seed storage proteins from cotton and cocoa which sequences had not been previously described as containing antimicrobial protein sequences or as exhibiting antimicrobial activity. Fragments of larger seed storage proteins containing sequences homologous to MiAMP2c were tested and are here demonstrated to exhibit antimicrobial activity. Thus, the inventors have established a process for obtaining antimicrobial protein fragments from larger seed storage proteins. In the light of these findings, it is evident that fragments of other seed storage proteins containing sequences similar to the proteins described will also exhibit antimicrobial activity. In particular, the 47-amino-acid TcAMPl (for Theobroma cacao antimicrobial protein 1) and the 60-amino-acid TcAMP2 sequences were derived from a cocoa vicilin seed storage protein gene sequence (which contains 525 amino acids) (Spencer, M.E. and Hodge R. [1992] Planta 186:567- 576). These derived fragments were then expressed in liquid culture. Cocoa vicilin fragments thus expressed and subsequently purified (Examples 10 and 11), were shown to be antimicrobial (Example 15). This is the first report that fragments of the cocoa vicilin protein possess antimicrobial activity. Pools of sequences containing fragments homologous to the MiAMP2c apparently released from cotton vicilin seed storage protein have been shown to possess antimicrobial activity (Chung, R. P.T. et al. [1997] Plant Science 127:1-16). This finding is clearly embodied in sequences disclosed in this application. In addition to showing that cocoa-vicilin-derived fragments exhibit antimicrobial activity, there is herein described additional proteins which exhibit antimicrobial activity. For example, there is described below proteins from Stenocarpus sinuatus which are of similar size to MiAMP2 subunits, react with MiAMP2c antiserum, and contain sequences homologous to MiAMP2 proteins (see Figure 4). Based on the evidence provided herein, sequences homologous to the MiAMP2c subunit (i.e., MiAMP2a, b, d; TcAMPl ; TcAMP2; and cotton fragments 1, 2 and 3 — see Figure 4) constitute proteins which contain the fragment with antimicrobial activity. The antimicrobial activity of MiAMP2 fragments from macadamia, and the TcAMPl and 2 fragments from cocoa, is exemplified below. R. P. T. Chung et al. (Plant Science 127:1-16 [1997]) have demonstrated that the cotton fragments exhibit antimicrobial activity. Other antimicrobial proteins can also be derived from seed storage proteins such as peanut allergen Ara h (Burks, A.W. et al. [1995] J. Clin. fnvest. 96 (4), 1715-1721), maize globulin (Belanger, F. C. and Kriz, A. L.[1991] Genetics 129 (3), 863- 872), barley globulin (Heck, G. R. et al. [1993] Mol. Gen. Genet. 239 (1-2), 209-218), and soybean conglycinin (Sebastiani, F. L. et al. [1990] Plant Mol. Biol. 15 (1), 197-201), all of which contain the same key elements which are present in the sequences which are here shown to exhibit antimicrobial activity.

The proteins which contain regions of sequence homologous to MiAMP2 (as in Figure 4) can be used to construct nucleotide sequences encoding 1) the active fragments of larger proteins, or 2) fusions of multiple antimicrobial fragments. This can be done using standard codon tables and cloning methods as described in laboratory manuals such as Current Protocols in Molecular Biology (copyright 1987-1995 edited by Ausubel F. M. et al. and published by John Wiley & Sons, Inc., printed in the USA). Subsequently, these can be expressed in liquid culture for purification and testing, or the sequences can be expressed in transgenic plants after placing them in appropriate expression vectors. The antimicrobial proteins per se will manifest a particular three-dimensional structure which may be determined using X-ray crystallography or nuclear magnetic resonance techniques. This structure will be responsible in large part for the antimicrobial activity of the protein. The sequence of the protein can also be subjected to structure prediction algorithms to assess whether any secondary structure elements are likely to be exhibited by the protein (see Example 8 and Figure 7). Secondary stmctures, thus predicted, can then be used to model three-dimensional global stmctures. Although three-dimensional structure prediction is not feasible for most proteins, the secondary structure predictions for MiAMP2c were sufficiently simple and clear that a three-dimensional model structure has been obtained for the MiAMP2c protein. Homologues exhibiting the same cysteine spacing and other key elements will also adopt the same three-dimensional structure. Example 8 shows that the structure most likely to be adopted by MiAMP2c (and homologues) is a helix-turn-helix structure stabilised by at least two disulfide bridges connecting the two antiparallel α-helical segments (see Figure 8). Additional stabilisation can be provided by an extra disulfide bridge (e.g., as in MiAMP2b) or by a hydrophobic ring-stacking interaction between tyrosine and/or phenylalanine residues (e.g., MiAMP2a and MiAMP2c), each located on the same face of the - helical segments as the normally present cysteine residues which participate in the 2 disulfide linkages mentioned above. NMR signals exhibited by MiAMP2c are consistent with the three- dimensional global model produced from the secondary-structure predictions mentioned above.

It will be appreciated that one skilled in the art could take a protein with known structure, alter the sequence significantly, and yet retain the overall three-dimensional shape and antimicrobial activity of the protein. One aspect of the stmcture that most likely could not be altered without seriously affecting the stmcture (and, therefore, the activity of he protein) is the content and spacing of the cysteine residues since this would disrupt the formation of disulfide bonds which are critical to a) maintaining the overall stmcture of the protein and/or b) making the protein more resistant to denaturation and proteolysis (stabilizing the protein stmcture). In particular, it is essential that cysteine residues reside on one face of the helix in which they are contained. This can best be accomplished by maintaining a three-residue spacing between the cysteine residues within each helix, but, can also be accomplished with a two-residue interval between the cysteine residues - provided the cysteines on the other helical segment are separated by three residues (i.e., C-X-X-C-X- X-X-C-nX-C-X-X-X-C-X-X-X-C where C is cysteine, X is any amino acid, and n is the number of residues forming a turn between the two α-helical segments). Aromatic tyrosine (or phenylalanine) residues can also function to add stability to the protein structure if they are located on the same face of the helix as the cysteine side chains. This can be accomplished by providing appropriate spacing of two or three residues between the aromatic residue and the proximate cysteine residue (i.e., Z-X- X-C-X-X-X-C-nX-C-X-X-X-C-X-X-X-Z where Z is tyrosine or phenylalanine).

The distribution of positive (and negative) charges on the various surfaces of the protein will also serve a critical role in determining the stmcture and activity of the protein. In particular, the distribution of positively-charged residues in an α-helical region of a protein can result in positive charges lying on one face of the helix or may result in the charged residues being concentrated in some particular portion of the molecule. An alternative distribution of positively charged residues is for them to project into the solvent in a radial orientation to the core of the protein. This orientation is predicted for several of the MiAMP2 homologues (data not shown). The spacing which is required for positioning of the residues on one face of the helix or the spacing required to accomplish a radial orientation from the core can easily be detemiined by one skilled in the art using a helical wheel plot with the sequence of interest. A helical wheel plot uses the fact that, in α-helices, each turn of the helix is composed of 3.6 residues on average. This number translates to 100° of rotational translation per residue making it possible to constmct a plot showing the distribution of side chains in a helical region. Figure 8 shows how the spacing of charged residues can lead to most of the positively charged side chains being localised on one face of the helix. It will be appreciated by one of skill in the art that positive charges are conferred by arginine and lysine residues.

In order for the protein to develop into a helix-turn-helix stmcture, it is also necessary to have particular residues that favor α-helix formation and that also favor a turn structure in the middle portion of the amino acid sequence (and disfavor a helical stmcture in the turn region). This can be accomplished by a proline residue or residues in the middle of the turn segment as seen with many of the MiAMP2 homologues. When proline is not present, glycine can also contribute to breaking a continuous helix structure, and inducing the formation of a turn at this position. In one case (i.e., TcAMPl), it appears that serine may be taking on this role. It will be appreciated that the residues in this region of the protein will usually favor the fomation of a turn stmcture; residues which fulfill this requirement include proline, glycine, serine, and aspartic acid; but, other residues are also allowed.

The DNA sequences reported here are an extremely powerful tool which can be used to obtain homologous genes from other species. Using the DNA sequences, one skilled in the art can design and synthesise oligonucleotide probes which can be used to screen cDNA libraries from other species of plants for the presence of genes encoding antimicrobial proteins homologous to the ones described here. This would simply involve construction of a cDNA library and subsequent screening of the library using as the oligonucleotide probe one or part of one of the sequences reported here (such as sequence ID. No. 2 or the PCR fragment described in Example 9). Other oligonucleotide sequences coding for proteins homologous to MiAMP2 can also be used for this puipose (e.g., DNA sequences corresponding to cotton and cocoa vicilins). Making and screening of a cDNA library can be carried out by purchasing a kit for said purpose (e.g., from Stratagene) or by following well established protocols described in available DNA cloning manuals (see Current Protocols in Molecular Biology, supra). It is relatively straight forward to construct libraries of various species and to specifically isolate vicilin homologues which are similar to the Macadamia, cotton, or cocoa vicilins by using a simple DNA hybridization technique to screen such libraries. Once cloned, these vicilin-related sequences can then be examined for the presence of MiAMP2-like subunits. Such subunits can easily be expressed in E. coli using the system described in Examples 10 and 11. Subsequently, these proteins can also be expressed in transgenic. Genes, or fragments thereof, under the control of a constitutive or inducible promoter, can then be cloned into a biological system which allows expression of the protein encoded thereby. Transformation methods allowing for the protein to be expressed in a variety of systems are known. The protein can thus be expressed in any suitable system for the purpose of producing the protein for further use. Suitable hosts for the expression of the protein include E. coli, fungal cells, insect cells, mammalian cells, and plants. Standard methods for expressing proteins in such hosts are described in a variety of texts including section 16 (Protein Expression) of Current Protocols in Molecular Biology (supra).

Plant cells can be transformed with DNA constmcts of the invention according to a variety of known methods (Agrobaderium, Ti plasmids, electroporation, micro-injections, micro-projectile gun, and the like). DNA sequences encoding the Macadamia integrifolia antimicrobial protein subunits (i.e. fragments a, b, c, or d from the MiAMP2 clones) as well as DNA coding for other homologues can be used in conjunction with a DNA sequence encoding a preprotein from which the mature protein is produced. This preprotein can contain a native or synthetic signal peptide sequence which will target the protein to a particular cell compartment (e.g., the apoplast or the vacuole). These coding sequences can be ligated to a plant promoter sequence that will ensure strong expression in plant cells. This promoter sequence might ensure strong constitutive expression of the protein in most or all plant cells, it may be a promoter which ensures expression in specific tissues or cells that are susceptible to microbial infection and it may also be a promoter which ensures strong induction of expression during the infection process. These types of gene cassettes will also include a transcription termination and polyadenylation sequence 3' of the antimicrobial protein coding region to ensure efficient production and stabilisation of the mRNA encoding the antimicrobial proteins. It is possible that efficient expression of the antimicrobial proteins disclosed herein might be facilitated by inclusion of their individual DNA sequences into a sequence encoding a much larger protein which is processed in planta to produce one or more active MiAMP2-like fragments. Gene cassettes encoding the MiAMP2 series antimicrobial proteins (i.e., MiAMP2a, b, c, or d; or all of the subunits together; or the entire MiAMP2 clone) or homologues of the MiAMP2 proteins as described above can then be expressed in plant cells using two common methods. Firstly, the gene cassettes can be ligated into binary vectors carrying: i) left and right border sequences that flank the T-DNA of the Agrobaderium tumefaciens Ti plasmid; ii) a suitable selectable marker gene for the selection of antibiotic resistant plant cells; iii) origins of replication that function in either tumefaciens or Escherichia coli; and iv) antibiotic resistance genes that allow selection of plasmid- carrying cells of A. tumefaciens and E. coli. This binary vector carrying the chimaeric MiAMP2 encoding gene can be introduced by either electroporation or triparental mating into A. tumefaciens strains carrying disarmed Ti plasmids such as strains LBA4404, GV3101 , and AGL1 or into A. rhizogenes strains such as A4 or NCCP1885. These Agrobaderium strains can then be co-cultivated with suitable plant explants or intact plant tissue and the transformed plant cells and/or regenerants selected using antibiotic resistance. A second method of gene transfer to plants can be achieved by direct insertion of the gene in target plant cells. For example, an MiAMP2-encoding gene cassette can be co-precipitated onto gold or tungsten particles along with a plasmid encoding a chimaeric gene for antibiotic resistance in plants. The tungsten particles can be accelerated using a fast flow of helium gas and the particles allowed to bombard a suitable plant tissue. This can be an embryogenic cell culture, a plant explant, a callus tissue or cell suspension or an intact meristem. Plants can be recovered using the antibiotic resistance gene for selection and antibodies used to detect plant cells expressing the MiAMP2 proteins or related fragments.

The expression of MiAMP2 proteins in the transgenic plants can be detected using either antibodies raised to the protein(s) or using antimicrobial bioassays. These and other related methods for the expression of MiAMP2 proteins or fragments thereof in plants are described in Plant Molecular Biology (2nd ed., edited by Gelvin, S.B. and Schilperoort, R.A., © 1994, published by Kluwcr Academic Publishers, Dordrecht, The Netherlands)

Both monocotyledonous and dicotyledonous plants can be transformed and regenerated. Examples of genetically modified plants include maize, banana, peanut, field peas, sunflower, tomato, canola, tobacco, wheat, barley, oats, potato, soybeans, cotton, carnations, roses, sorghum. These, as well as other agricultural plants can be transformed with the antimicrobial genes such that they would exhibit a greater degree of resistance to pathogen attack. Alternatively, the proteins can be used for the control of diseases by topological application. The invention also relates to application of antimicrobial protein in the control of pathogens of mammals, including humans. The protein can be used either in topological or intravenous applications for the control of microbial infections.

As indicated above in the description of the tenth embodiment, the invention includes within its scope the preparation of antimicrobial proteins based on the prototype MiAMP2 series of proteins. New sequences can be designed from the MiAMP2 amino acid sequences which substantially retain the distribution of positively charged residues relative to cysteine residues as found in the MiAMP2 proteins. The new sequence can be synthesised or expressed from a gene encoding the sequence in an appropriate host cell. Suitable methods for such procedures have been described above. Expression of the new protein in a genetically engineered cell will typically result in a product having a correct three-dimensional stmcture, including correctly formed disulphide linkages between cysteine residues. However, even if the protein is chemically synthesised, methods are known in the art for further processing of the protein to break undesireable disulfide bridges and form the bridges between the desired cysteine residues to give the desired three-dimensional structure should this be necessary. Macadamia integrifolia antimicrobial proteins series number 2

As indicated above, a new series of potent antimicrobial proteins has been identified in the seeds of Macadamia integrifolia. The proteins collectivelly are called the MiAMP2 series of antimicrobial proteins (or MiAMP2 proteins) because they are all found on one large preproprotein which is processed into smaller subunits, each exhibiting antimicrobial activity; they represent the second class of antimicrobial proteins isolated from Macadamia integrifolia. Each protein fragment of the series has a characteristic pi value. MiAMP2a, b, c, and d subunits as shown in Figure 4 have predicted pi values of 4.4, 4.6, 11.5, and 11.6 respectively (predicted using raw sequence data without the His tag or cleavage sequences associated with expression of fragments in the vector pETl 6b), and contain two sets of CXXXC motifs which are important in stabilising the three- dimensional stmcture of the protein through the formation of disulfide bonds. Additionally, the proteins contain either an added set of aromatic (tyrosine/phenylalanine) residues or an added set of cysteine residues located at positions which would give more stability to the helix-turn-helix stmcture as described above and in Example 8. The amino acid sequences of the MiAMP2 series of proteins share significant homology with fragments of previously described proteins in sequence databases (Swiss Prot and Non-redundant databases) searched using the BLASTP algorithm (Altschul, S.F. et al. [1990] J. Mol. Biol. 215:403). In particular, MiAMP2a, b, c and d sequences exhibit significant similarity with regions of cocoa vicilin and cotton vicilin (as seen in Figure 6). Some similarity is also seen with fragments from other seed storage proteins of peanut (Burks, A. W. et al. [1995] J. Clin. Invest. 96 (4), 1715-1721), maize (Belanger, F. C. and Kriz, A. L.[1991] Genetics 129 (3), 863-872), barley (Heck, G. R. et al. [1993] Mol. Gen. Genet. 239 (1-2), 209-218), and soybean (Sebastiani, F. L. et al. [1990] Plant Mol. Biol. 15 (1), 197-201). Although, in some cases the homology is not extremely high (for example, 18% identity between MiAMP2a and cotton subunit 1; see Figure 4), the spacing of the main four cysteine residues is consei'ved in all subunits and homologues. In addition, both cotton and cocoa vicilin-derived subunits retain the conserved tyrosine or phenylalanine residues as additional stabilisers of the tertiary stmcture. The cotton and cocoa vicilins with 525 and 590 amino acids, respectively, are much larger proteins than MiAMP2c (47 amino acids) (see Figures 4 and 6). Although MiAMP2 subunits also share some homology with MBP- 1 antimicrobial protein from maize (Duvick, J.P. et al. (1992) J Biol Chem 267:18814-20) the number of residues between the

CXXXC motifs is 13 which puts MBP-1 outside the specifications for the spacing given here in this application. MBP-1 is also a smaller protein (33 amino acids), overall, than the sequences claimed here and there is no evidence available the MBP-1 is derived from a larger seed storage protein other than some similarity with a portion of miaze globulin protein. However, MBP- 1 cannot be derived from f 1 om the maize globulin since maize globulin contains 10 i esidues between the two CXXXC motifs while MBP- 1 contains 13 The alignments in Figures 4 and 6 show the similarity m cysteine spacing between MιAMP2 subunits and the cocoa and cotton vicihn-deiived molecules The cysteine and the aromatic tyrosme/phenylalanme residues m Figuies 4 and 6 aie highlighted with bold undei lined text Figure 4 also shows the alignment of additional proteins which can be expiessed in liquid culture and shown to exhibit antimicrobial activity

All of the MιAMP2 homologues that have been tested exhibit antifungal activity MιAMP2 homologues show very significant inhibition of fungal growth at concentrations as low as 2 μg/ml foi some of the pathogens/microbes against which the proteins were tested Thus they can be used to piovide piotection against several plant diseases MιAMP2 homologues can be used as fungicides or antibiotics by application to plant paits The proteins can also be used to inhibit giowth of pathogens by expiessmg them m transgenic plants The proteins can also be used foi the control of human pathogens by topological application oi mtiavenous injection One chaiacteπstic of the piotems is

2+ that inhibition of some microbes is suppressed by the presence of Ca (1 mM) An example of this effect is piovided foi MιAMP2c subunit in Table 1

Some of the MιAMP2 proteins and homologues could also function as insect contiol agents Since some of the piotems aie extremely basic (e g , pi > 11 5 foi MιAMP2c and d subunits), they would maintain a sti ong net-positive charge even in the highly alkaline envn onment of an insect gut This stiong net-positive charge would enable it to interact with negatively charged stmctmes within the gut This mtei action may lead to inefficient feeding, slowing of growth, and possibly death of the insect pest

Non-limiting examples of the invention follow

Example 1 Exti action of Basic Protein from Macadamia integrifolia Seeds Twenty five kilograms of Mi nuts (purchased from the Macadamia Nut Factory, Queensland,

Australia) weie giound in a food processor (The Big Oscar, Sunbeam) and the lesultmg meal was extiacted foi 2-4 houis at 4°C with 50 L of an ice-cold extraction buffer containing 10 mM NaH2P04, 15 mM Na2HP04, 100 mM KC1, 2 mM EDTA, 0 75% polyvmylpolypyrohdone, and 0 5 mM phenylmethylsulfonyl fluonde (PMSF) The resulting homogenate was run thiough a kitchen stramei to lemove laigei paiticulate material and then further clarified by centiifugation (4000 rpm for 15 mm) m a large capacity centrifuge Solid ammonium sulphate was added to the supernatant to obtain 30% lelative saturation and the precipitate allowed to form overnight with stirring at 4°C Following centrifugation at 4000 rpm for 30 mm, the supernatant was taken and ammonium sulphate added to achieve 70% relative saturation The solution was allowed to precipitate overnight and then centnfuged at 4000 lpm for 30 mm order to collect the precipitated protein fiaction The piecipitated protein was lesuspended m a minimal volume of extraction buffei and centnfuged once again (13,000 rpm x 30 mm) to lemove the any insoluble material yet remaining Aftei dialysis (10 mM ethanolamme pH 9 0, 2 mM EDTA and 1 mM PMSF) to remove residual ammonium sulphate, the piotem solution was passed through a Q-Sepharose Fast Flow column (5 x 12 cm) pieviously equilibrated with 10 mM ethanolamme (pH 9), 2 mM in EDTA) The collected flowthiough from this column lepresents the basic (pi >9) protein fraction of the seeds This fiaction was further punfied as descnbed m Example 3

Example 2 Antifungal and Antibacterial Activity Assays

In geneial, bioassays to assess antifungal and antibacterial activity weie carried out in 96-well miciotitie plates Typically, the test organism was suspended in a synthetic giowth medium consisting of K2HPO4 (2 5 mM), MgSθ4 (50 μM), CaCl2 (50 μM), FeSθ4 (5 μM), C0CI2 (0 1 μM), CuS04 (0 1 μM), Na2Moθ4 (2 μM), H3BO3 (0 5 μM), KI (0 1 μM), Z11SO4 (0 5 μM), MnS04 (0 1 μM), glucose (10 g/L), asparagine (1 g/L), methionine (20 mg/L), myo-inositol (2 mg/L), brotm (0 2 mg/L), thiamine-HCl (1 mg/L) and pyπdoxme-HCL (0 2 mg/L) The test organism consisted of bacterial cells, fungal spores (50,000 spoies/ml) or fungal mycehal fiagments (produced by blending a hyphal mass from a culture of the fungus to be tested and then filtering through a fine mesh to lemove larger hyphal masses) Fifty miciohtres of the test organism suspended m medium was placed into each well of the microtitre plate A fui ther 50 μl of the test antimicrobial solution was added to appropriate wells To deal with well-to-well vanabihty in the bioassay, 4 lephcates of each test solution were done Sixteen wells from each 96-well plate weie used as controls for comparison with the test solutions

Unless otherwise stated, incubation was at 25°C for 48 houis All fungi including yeast were gιown at 25°C E colt weie grown at 37°C and other bacteria were bioassayed at 28°C Peicent growth inhibition was measured by following the absorbance at 600 nm of gi owing cultures over vanous time intervals and is defined as 100 times the ratio of the average change in absorbance in the contiol wells minus the change in absorbance the test well divided by the average change in absorbance at 600 nm for the control wells (1 e , [(avg change in control wells - change in test well) / (avg change in contiol wells)] x 100) Typically, measuiements were taken at 24 hour intervals and the penod fiom 24-48 hours was used for %Inhιbιtιon measurements Example 3 Purification of antimicrobial protein from Macadamia integrifolia basic protein fraction The starting material for the isolation of the Mi antimicrobial protein was the basic fraction extracted from the mature seeds as described above in Example 1. This protein was further purified by cation exchange chromatography as shown in Figure 1.

About 4 g of the basic protein fraction dissolved in 20 mM sodium succinate (pH 4) was applied to an S-Sepharose High Performance column (5 X 60 cm) (Pharmacia) previously equilibrated with the succinate buffer. The column was eluted at 17 ml/min with a linear gradient of 20 L from 0 to 2 M NaCl in 20 mM sodium succinate (pH 4). The eluate was monitored for protein by on-line measurement of the absorbance at 280 nm and collected in 200 ml fractions. Portions of each fraction were subsequently tested in the antifungal activity assay against Phytopthora cryptogea

2+ at a concentration of 100 μg/ml in the presence and absence of 1 mM Ca . Results of bioassays are included in Figures 1 a and 1 b where the elution gradient is shown as a solid line and the shaded bars

2+ 2+ represent %Inhibition. The Figure la assays were conducted without added Ca while 1 mM Ca was included in the Figure lb assays. Fractionation yielded a number of unresolved peaks eluting between 0.05 and 2 M NaCl. A peak eluting at about 16 hours into the separation (fractions 90-92) showed significant antimicrobial activity.

Fractions showing significant antimicrobial activity were further purified by reversed-phase chromatography. Aliquots of fractions 90-92 were loaded onto a Pep-S (C2/C18), column (25 x 0.93 cm) (Pharmacia) equilibrated with 95% H2θ 5% MeCN/0.1 % TFA (=100%A). The column was eluted at 3 ml/min with a 240 ml linear gradient (80 min) from 100%A to 100%B (=5% H2θ 95% MeCN/0.1 % TFA). Individual peaks were collected, vacuum dried three times in order to remove traces of TFA, and subsequently resuspended in 500 microlitres of milli-Q water (Millipore Corporation water purification system) for use in bioassays as described in Example 2. Figure 2 shows the HPLC profile of purified fraction 92 from the cation-exchange separation shown in

Figures 1 and 2. Protein elution was monitored at 214 nm. The acetonitrile gradient is shown by the straight line. Individual peaks were bioassayed for antimicrobial activity: the bars in Figure 3 show the inhibition corresponding to 15 μg/ml of material from each of the fractions. The active protein elutes at approximately 27 min (-30% MeCN/0.1%TFA) and is called MiAMP2c. Example 4

Purity of Isolated MiAMP2c The purity of the isolated antimicrobial protein was verified by native SDS-PAGE followed by staining with coomassie blue protein staining solution. Electrophoresis was performed on a 10-20% tricine gradient gel (Novex) as per the manufacturers recommendations (100 V, 1-2 hour separation time). Under these conditions the purified MiAMP2c migrates as a single discrete band (<10 kDa in size). The detection of a single major band in the SDS-PAGE analysis together with single peaks eluting in the cation-exchange and reversed-phase separations (not shown), gives strong indication that the MiAMP2c preparation is greater than 95% pure and therefore the activity of the preparation was almost certainly due to the MiAMP2c alone and not to a minor contaminating component. A clean signal in mass spectrometric analysis (Example 5 below) also supports this conclusion.

Example 5 Mass Spectroscopic Analysis of MiAMP2c Purified MiAMP2c was submitted for mass spectroscopic analysis. Approximately 1 μg of protein in solution was used for testing. Analysis showed the protein to have a molecular weight of 6216.8 Da ± 2 Da. Additionally, the protein was subjected to reduction of disulfide bonds with dithiothreitol and alkylation with 4-vinylpyridine. The product of this reduction/alkylation was then submitted for mass spectroscopic analysis and was shown to have gained 427 mass units (i.e. molecular weight was increased by approximately 4 X 106 Da). The gain in mass indicated that four 4-vinylpyridine groups had reacted with the reduced protein, demonstrating that the protein contains a total of 4 cysteine residues. The cysteine content has also been subsequently confirmed through amino acid sequencing.

Example 6 Amino Acid Sequence of MiAMP2c Protein Approximately 1 μg of the pure protein which had been reduced and alkylated was subjected to Automated Edman degradation N-terminal sequencing. In the first sequencing run, the sequence of the first 39 residues was determined. Subsequently, approximately 1 mg of MiAMP2c was reacted with Cyanogen Bromide which cleaved the protein on the C-terminal side of Methionine-26. The C-terminal fragment generated by the cleavage reaction was purified by reversed-phase HPLC and sequenced, yielding the remaining sequence of MiAMP2c (i.e. residues 27-47). The full amino acid sequence is RQRDP QQQYE QCQER CQRHE TEPRH MQTCQ QRCER RYEKE KRKQQ KR and represents amino acids 118 to 164 of clone 3 from Example 9 (see Figure 6 and SEQUENCE ID NO: 5). In the figure, cysteine residues are in bold type and underlined to facilitate recognition of the spacing patterns. Depending on the number of disulfide bonds that are formed, the protein mass will range from 6215.6 to 6219.6 Da. This is in close agreement with the mass of 6216.8 ± 2 Da obtained by mass spectrometric analysis (Example 5). The measured mass closely approximates the predicted mass of MiAMP2c in a two-disulfide form as is expected to be the case. Example 7 Synthetic DNA Sequence Coding for MiAMP2c with a leader peptide Using standard codon tables it is possible to reverse-translate the protein sequences to obtain DNA sequences that will code for the antimicrobial proteins. The software program Mac Vector 4.5.3 was used to enter the protein sequence and obtain a degenerate nucleotide sequence. A codon usage table for tobacco was referenced in order to pick codons that would be adequately represented in tobacco for purposes of obtaining high expression in this test plant. A 30 amino-acid leader peptide was also designed to ensure efficient processing of the signal peptide and secretion of the peptide extracellularly. For this purpose, the method of Von Hiejne was used to evaluate a series of possible leader sequences for probability of cleavage at the correct position [Von Hiejne, G.(l 986) Nucleic Acids Research 14(11): 4683-4690]. In particular, the amino acid sequence MAWFH VSVCN AVFVV IIIIM LLMFV PVVRG (Sequence ID. No. 11) was found to give an optimal probability of correct processing of the signal peptide immediately following the G (Gly) of this leader sequence. A 5' untranslated region from tobacco mosaic virus was also added to this synthetic gene to promote higher translational efficiency [Dowson, M.J., et al. (1994) Plant Mol. Biol. Rep. 12(4):347-357]. The synthetic gene also contains restriction sites at the 5' and 3' ends and immediately 5' of the start ATG for efficient cloning and subcloning procedures. Figure 5 shows a synthetic DNA sequence suitable for use in plant expression experiments. In this Figure, the arrow shows where translation is initiated and the triangular symbol indicates the point of cleavage of the signal peptide.

Example 8 Stmcture prediction of MiAMP2c Protein Using sequence analysis algorithms, putative secondary stmcture motifs can be assigned to the protein. Five different algorithms were used to predict whether α-helices, β-sheets, or turns can occur in the MiAMP2c protein (Figure 4). Methods were obtained from the following sources: DPM method, Deleage, G., and Roux, B. (1987) Prot. Eng. 1 :289-294; SOPMA method, Geourjon, C, and Deleage, G. (1994) Prot. Eng. 7:157-164; Gibrat method, Gibrat, J.F., Gamier, J., and Robson, B.(1987) J.Mol.Biol. 198:425-443; Levin method, Levin, J.M., Robson, B., and Gamier, J. (1986) FEBSLett. 205:303-308; and PhD method, Rost, B, And Sander, C. (1994) Proteins 19:55-72. Figure 7 shows the predicted locations of α-helices, β-sheets and turns. The following symbols have been used in Figure 7: C, coil (unstmctured); H, alpha helix; E, β- sheet; and S, turn. Underlined residues are those which were predicted to exhibit an α-helical stmcture by at least 2 separate stmcture prediction methods; these are represented as helices in Figure 8. It is clear from the secondary stmcture predictions that the protein is highly α-helical. While secondary structure prediction is often difficult and inaccurate, this particular prediction gives a clear indication of the stmcture of the protein. Examination of the secondary-structure predictions show a clear preponderance of two α-helical regions broken by a stretch of about 5-8 residues. This is highly suggestive of a helix-turn-helix motif.

Helical wheel analysis of the MiAMP2c amino acid sequence shows that cysteine residues with a CXXXC spacing will be aligned on one face of the helix in which they are located. Since the cysteines are involved in disulfide bond formation, the cysteine side chains in one helix must form covalent bonds with the cysteine side chains located on the other helical segment. When the helical segments are arranged in such a way as to bring the cysteine side chains from each respective helix into proximity with the other cysteine side chains, the resulting three-dimensional structure is shown in Figure 8. This structure exhibits a remarkable distribution of positively charge residues on one face of the protein comprised of two helices held together by two disulfide bonds. Figure 8 shows how the spacing of positively charged residues in helical regions of this molecule will cause these side chains to lie on one face of the helix. The positively charged residues are the dark side chains outlined in black. Other dark side chains represent acidic residues. A proline residue (grey colour marked with a 'P') is located at the extreme left end of the molecule in the turn region. Solid black lines show where disulfide bonds connect the two helices. The dotted line shows where the two aromatic hydrophobic residues interact to add stability to the helix-turn-helix structure. This helix-turn-helix stmcture will be adopted by all MiAMP2 homologues containing the same cysteine spacing and residues with helix and turn-forming propensities. Other MiAMP2 fragment sequences can be superimposed onto the global stmcture shown in figure 8. The overall stmcture will remain essentially the same but the charge distribution will vary according to the sequences involved. In the case of MiAMP2b, the dotted line would represent an added disulfide bridge instead of a hydrophobic interaction.

Example 9 cDNA cloning of genes corresponding to MiAMP2c PCR Amplification of a genomic fragment of the MiAMP2c gene

Using the reverse-translated nucleotide sequences, degenerate primers were made for use in PCR reactions with genomic DNA from Macadamia. Primer JPMl 7 sequence was 5' CAG CAG CAG TAT GAG CAG TG 3' and primer JPM20 degenerate sequence was 5' TTT TTC GTA (T/T)C(T/G) (G/T)C(T/G) TTC GCA 3' (SEQ ID NOS: 12 and 13). Primers JPM17 and JPM20 were used in PCR amplifications carried out for 30 cycles with 30 sec at 95°C, 1 min at 50°C, and 1 min at 72°C. PCR products with sizes close to those which were expected were directly sequenced (ABI PRISM Dye Terminator Cycle Sequencing Ready Reaction Kit from Perkin Elmer Corporation) after excising DNA bands from agarose gels and purifying them using a Qiagen DNA clean-up kit. Using this approach, it was possible to amplify a fragment of DNA of approximately 100 bp. Direct sequencing of this nucleotide fragment yielded the nucleotide sequence corresponding to a portion of the amino acid sequence of the antimicrobial protein MiAMP2c (amino acids 7-39 of Figure 4). The partial nucleotide sequence obtained from the above-mentioned fragment excluding the primer sequences was 5' TCA GAA GCG CTG CCA ACG GCG CGA GAC AGA GCC ACG ACA CAT GCA AAT TTG TCA ACA ACG C 3' (corresponding to base pairs 264 to 324 in SEQ ID NO: 6). This sequence can be used for a variety of purposes including screening of cDNA and genomic libraries for clones of MiAMP2 homologues or design of specific primers for PCR amplification reactions. Messenger RNA isolation from Macadamia nut kernels

Fifty-eight grams of Macadamia nut kernels were ground to powder under liquid nitrogen using a mortar and pestel. RNA from ground material was then purified using a Guanidine thiocyanate/Cesium chloride technique (Current Protocols in Molecular Biology, supra). Using this method approximately 5 mg of total RNA was isolated. Messenger RNA was then purified from total RNA using a spun column mRNA purification kit (Pharmacia). cDNA library constmction

A cDNA library was constmcted in a lambda ZAP vector using a library kit from Stratagene. A total of 6 reactions were performed using 25 micrograms of messenger RNA. First and second strand cDNA synthesis was performed using MMLV Reverse transcriptase and DNA Polymerase I, respectively. After blunting the cDNA with Pfu DNA Polymerase, Eco RI linker adapters were ligated to the DNA. DNA was then kinased using T4 polynucleotide kinase and the DNA subsequently digested with Xho I restriction endonuclease. At this point cDNA material was fractionated according to size using a sephacryl-S500 column supplied with the kit. DNA was then ligated into the lambda ZAP vector. The vector containing ligated insert was then packaged into lambda phage (Gigapack III packaging extract from Stratagene). Screening of library

The library constmcted above was then plated and screened in XLl-blue E.coli bacterial lawns growing in top agarose. Plaques containing individual clones were isolated by lifting onto Hybond N+ membranes (Amersham LIFE SCIENCE), hybridizing to a radiolabeled version of the genomic DNA fragment amplified above, imaging of the blot, and picking of possitive clones for the next round of screeing. After secondary and tertiary screening, plaques were sufficiently isolated to allow picking of single clones Several clones were obtained, and subsequently the pBK-CMV vector poition fiom the laigei lambda vector was excised Sequence of MιAMP2c cDNA clones

Vectors (pBK-CMV) containing putative MιAMP2c clones were sequenced to obtain the DNA sequence of the cloned inserts Seven clones were partially sequenced and an additional thiee clones weie fully sequenced (see SEQ ID NOS 2, 4 and 6 for DNA sequences of the macadamia clones) Tianslation of the DNA sequences showed that the full length clones encoded highly similar proteins of 666 ammo acids Figure 6 shows that these proteins have substantial similanty to vicilin seed- stroiage proteins fiom cocoa and cotton Stars show positions of conserved identities and dots show positions of conserved similarities Examination of the protein sequences revealed that the exact MιAMP2c sequence is found within the translated protein sequence of clone 3 at ammo acid positions 1 18 to 164 (see Figure 6), clones 1 and 2 contained sequences differing fiom MιAMP2c by 2 residues and 3 residues, respectively, out of 47 ammo acids total in the MιAMP2c sequence

The tianslation pioducts of the full-length clones (l e , clones 1 and 2) consist of a shoit signal peptide fiom lesidues 1 to 28, a hydiophihc region from lesidues 29 to -246, and then two segments sti etching fiom lesidues -246 to 666 with a stretch of acidic residues sepaiatmg them at positions 542-546

Significantly, the hydrophilic region containing the sequence foi MιAMP2c, also contains 3 additional segments which are very similar to MιAMP2 (termed MιAMP2a, b and d) These 4 segments (found between residues 28 and -246) aie separated by stretches m which appioximately foui out of five lesidues aie acidic (usually glutamic acid) These acidic stretches occui at positions 64-68, 1 1 1 -1 15, 171 -174, and 241-246 and appear to delineate piocessing sites foi cleavage of the 666-1 esidue piepioprotein into smallei functional fragments (acidic stretches delineating cleavage sites aie shown as bold chaiacters in Figure 6) All four MιAMP2-lιke segments of the piotem contain 2 doublets of cysteine residues separated by 10-12 residues to give the following pattem C- X-X-X-C-(10-12X)-C-X-X-X-C where X is any amino acid, and C is cysteine All four segments are expected to form hehx-turn-hehx motifs as decπbed m Example 8 above It is cleai that the cystemes in these locations will form disulfide bridges that stabilize the stiuctuie of the piotems by holding the two helical poitions together The piedicted hehx-turn-hehx motifs can be furthei stabilized in seveial ways The first method of stabilization is exemplified in segments 1 and 3 (l e , residues 29-63 and 118-170, lespectively, of the 666-1 esidue Macadamia vicihn-hke protein) These segments is the are stabilized by a hydrophobic rmg-stackmg interaction between two aromatic residues (one on each α- hehcal segment), this is normally accomplished with tyrosme residues but phenylalanine is also used. As with the cysteine residues, the location of these aromatic residues in the predicted α-helical segments is critical if they are to offer stabilization to the helix-turn-helix structure. In segments 1 and 3, the aromatic residues are 2 and 3 residues removed from the cysteine doublets as shown here: Z-X-X-C-X-X-X-C-(10-12X)-C-X-X-X-C-X-X-X-Z where C is cysteine and Z is usually tyrosine but can be substituted with phenylalanine as is done in segment 1.

The second way to stabilize the helix-turn-helix fragment is by using an added disulfide bridge as seen in fragment 2 (residues 71-1 10). This is accomplished by placing additional cysteine residues 2 and 3 residues removed from the cysteine doublets as shown here: nX-C-X-X-C-X-X-X- C-(10-12X)-C-X-X-X-C-X-X-X-C-nX. This is the only report that the inventors know of where a hclix-turn-helix domain in an antimicrobial protein is stabilized by three disulfide bridges. While segment 4 (residues 175-241) does not contain the extra disulfide bridge or the hydrophobic ring- stacking stabilization, it is probably stabilized by means of weaker ionic and or hydrogen bonding interactions.

Example 10 Vectors for liquid culture expression of MiAMP2 and homologues

PCR primers flanking the nucleotide region coding for MiAMP2c were engineered to contain restriction sites for Nde I and Bam HI (corresponding to the 5' and 3' ends of the coding region, respectively; Primer JPM31 sequence: 5' A CAC CAT ATG CGA CAA CGT GAT CC 3'; Primer JPM32 sequence: 3' C GTT GTT TTC TCT ATT CCT AGG GTT G 5', SEQ ID NOS: 14 and 15). These primers were then used to amplify the coding region of MiAMP2c DNA. The PCR product from this amplification was then digested with Nde I and Bam HI and ligated into a pETl 7b vector (Novagen / Studier, F. W. et al. [1986] J. Mol. Biol. 189: 1 13) with the coding region in-frame to produce the vector pET17-MiAMP2c.

A similar approach to the one above was used to construct vectors carrying the coding sequences of MiAMP2c homologues (i.e. MiAMP2a, b, and d as well as Tc AMPl, and TcAMP2). To construct the expression vectors for fragments a, b and d in MiAMP2 clone 1, specific PCR primers incorporating the Nde I and Bam HI sites were designed to amplify the fragments of interest. The products were then digested with the appropriate restriction enzymes and ligated into the Nde l/Bam FII sites of a pETl 6b vector [Novagen] containing a His tag and a Factor Xa cleavage site (ammo acid sequence MGHHH HHHHH HHSSG HIEGR HM, SEQ ID NO: 16). The protein products expressed from the pET16b vector is a fusion to the antimicrobial protein. The coding sequences for MiAMP2-like subunits from cocoa (Figure 4, TcAMPl and TcAMP2) were obtained from the published DNA sequence of the cocoa vicilin gene (Spencer, M. E. and Hodge R. [1992] Planta 186:567-576). Two MiAMP2-like fragments within the cocoa vicilin gene were located at the 5' end (corresponding to the residues shown in Figure 4), and two sets of complimentary oligonucleotides corresponding to the desired coding sequences were designed. The complimentary oligonucleotides (90 to -100 bases) corresponding to each cocoa subunit contained a 20bp overlap and also contained the Nde I and Bam HI restriction endonuclease cut sites. For TcAMP, the following nucleotides were synthesised:

TcAMP 1 forward oligo 5' GGGAATTCCA TATGTATGAG CGTGATCCTC

GACAGCAATA CGAGCAATGC CAGAGGCGAT GCGAGTCGGA AGCGACTGAA GAAAGGGAGC 3'; TcAMPl reverse oligo 5' GAAGCGACTG AAGAAAGGGA GCAAGAGCAG TGTGAACAAC GCTGTGAAAG GGAGTACAAG

GAGCAGCAGA GACAGCAATA GGGATCCACA C 3'. For TcAMP2, the following oligonucleotides were used:

TcAMP2 forward oligo 5 ' GGGAATTCCA TATGCTTCAA AGGCAATACC

AGCAATGTCA AGGGCGTTGT CAAGAGCAAC AACAGGGGCA GAGAGAGCAG CAGCAGTGCC

AGAGAAAATG C 3'; TcAMP2 reverse oligo 5' GTGTGGATCC CTAGCTCCTA TTTTTTTTGT

GATTATGGTA ATTCTCGTGC TCGCCTCTCT CTTGTTCCTT ATATTGCTCC CAGCATTTTC TCTGGCACTG CT 3'.

The oligonucleotide sets were added to individual PCR amplification reactions in order make individual PCR fragments containing the desired coding region. Since initial PCR amplifications gave fuzzy bands, reamplification of the original products was carried out using new 20mer primers (complimentary to the 5 'ends of the forward and reverse oligonucleotides shown above) designed to amplify the entire coding region of the cocoa subunits. Once amplified, the PCR products were restriction digested with the appropriate enzymes and ligated into the vector pET16b as above. This procedure was carried out for both cocoa fragments with similarities to MiAMP2c (shown in Figure

4).

Example 1 1 Expression in E.coli and purification of MiAMP2c and homologues

Starter cultures (50 ml) of E.coli strain BL21 (Grodberg, J. [1988] J. Baderiol. 170: 1245) transformed with the appropriate pET construct (Example 10) were added to 500ml of NZCYM media (Current Protocols in Molecular Biology, supra) and cultured to an optical density of 0.6 (600 nm) and induced with the addition of 0.4 or 1.0 mM IPTG depending on whether pET17b (containing a T7 promoter) or pET16b (containing a His tag fusion and a T7 promoter/lac operator) vector was being used. After cells were induced, cultures were allowed to grow for 4 hours before harvesting. Aliquots of the growing cultures were removed at timed intervals and protein extracts run on an SDS-PAGE gel to follow the expression levels of M1AMP2 and homologues in the cultures. Fragments being expressed with a Histidine tag (i.e., in the pET16b vector), were harvested by centrifuging induced cell cultures at 5000g for 10 minutes. Cell pellets were resuspended and broken by stirring for one hour in 6 M Guanidine-HCl, buffered with 100 mM sodium phosphate and 10 mM Tris at pH 8.0. Broken cell suspensions were centrifuged at 10,000g for 20-30 minutes to settle the cellular debris. Supematants were removed to fresh tubes and 500 mg of Ni-NTA fast flow resin (Qiagen) was added to each suptematant. After gentle mixing at 4°C for 30-60 minutes, the suspension was loaded into a small column, rinsed two times with 8 M Urea (pH 8.0 and then pH 6.3) and subsequently, the protein was eluted using 8 M Urea pH 4.5. Protein fractions thus obtained were substantially pure but were further purified using an 9.3 x 250 mm C2/C18 reverse phase column (Pharmacia) and 75 minute gradient from 5% to 50% acetonitrile (0.1% TFA) flowing at 3 ml/min (data not shown).

All of the MiAMP2c homologues (except MiAMP2c which was expressed in pET17b) were expressed in the pETl 6b vector containing the Histidine tag. While induction of the MiAMP2c culture preceded as above, the rest of the purification was somewhat different. In this case, MiAMP2c-expressing cells were harvested by centrifugation but were then resuspended in phosphate buffer (100 mM, pH 7.0 containing 10 mM EDTA and 1 mM PMSF) and broken open using a French press instmment. Cellular debris containing MiAMP2c inclusion bodies was solubilized using a 6 M Guanidine-HCl, 10 mM MES pH 6.0 buffer. Soluble material was then recovered after centrifugation to remove insoluble debris remaining from the solubilization step. Guanidine-HCl soluble material was then dialyzed against 10 mM MES pH 6.0 containing PMSF (1 mM) and EDTA (10 mM). Cation-exchange fractionation was carried out as described in Example 3 except on a smaller scale after the dialysis step. Subsequently, the major eluting protein from the cation- exchange column, which was MiAMP2c, was then further purified using reverse phase HPLC as described in Example 3.

Figure 9 shows the SDS-PAGE gel analysis of the various purification stages obtained following induction with IPTG and subsequent purification of expressed proteins. Samples analysed during the TcAMPl purification were are as follows: lane 1, molecular weight markers; lane 2, Ni- NTA non-binding fraction; lane 3, rinse of Ni-NTA resin with pH 8 urea; lane 4, rinse of Ni-NTA resin with pH 6.3 urea; lane 5, elution of TcAMPl with pFI 4.5 urea; and lane 6, second elution of TcAMPl with pH 4.5 urea. TcAMP2 was purified in a similar manner and was also subjected to reverse-phase HPLC to further purify the fraction eluting from the Ni-NTA resin. Figure 10 shows the reverse phase purification of cocoa subunit number 2 (TcAMP2).

SDS-PAGE gel analysis of the MiAMP2a, b, and d fragment purification is shown in the second panel of Figure 9. Lane contents are as follows: lane 1, molecular weight markers; lane 2, MiAMP2a pre-induced cellular extractp; lane 3, MiAMP2a IPTG induced cellular extract; lane 4, MiAMP2a Ni-NTA non-binding fraction; lane 5, MiAMP2a elution from Ni-NTA; lane 6, MiAMP2b pre-induced cellular extract; lane 7, MiAMP2b IPTG induced cellular extract; lane 8, MiAMP2b Ni-NTA non-binding fraction; lane 9, MiAMP2b elution from Ni-NTA; lane 10, MiAMP2d pre-induced cellular extract; lane 11, MiAMP2d IPTG induced cellular extract; lane 12, MiAMP2d Ni-NTA non-binding fraction; and lane 13, MiAMP2d elution from Ni-NTA.

Using the vectors described in Example 10, MiAMP2c, and 5 homologues (i.e., MiAMP2a, MiAMP2b, MiAMP2d, TcAMPl and TcAMP2) were all expressed, purified and tested for antimicrobial activity. The approach taken above can be applied to all of the antimicrobial fragments described in Figure 4. Purified fragments can then be tested for specific inhibition agains microbial pathogens of interest.

Example 12 Detection of MiAMP2 homologues in other species using antibodies raised to MiAMP2c Rabbits were immunised intramuscularly according to standard protocols with MiAMP2 conjugated to diphtheria toxoid suspended in Fmends incomplete adjuvent. Serum was harvested from the animals at regular intervals after giving the animal added doses of Mi AMP2 adjuvent to boost the immune response. Approximately 100 ml of semm were collected and used for screening of crude extracts obtained from several plant seeds. One hundred gram quantities of seeds were ground and extracted to obtain a cmde extract as in Example 1. Aliquots of protein were separated on SDS-PAGE gels and the gels were then blotted onto nitrocellulose membrane for subsequent detection of antibody reacting proteins. The membranes were incubated with MiAMP2c rabbit primary antibodies, washed and then incubated with alkaline phosphatase-conjugated goat anti-rabbit IgG for colorimetric detection of antigenic bands using the chemical 5-bromo-4-chloro-3-indolyl phosphate / nitroblue tetrazolium substrate system (Schleicher and Schuell). Figure 1 1 shows that various other species contain immunologically-related proteins of similar size to MiAMP2c. Lanes 1 -15 contain the extracts from the following species: 1) Stenocarpus sinuatus, 2) Stenocarpus sinuatus(\/\0 loading) , 3) Restio tremulus, 4) Mesomalaena tetragona, 5) Nitraria billardieri, 6) Petrophile canescens, 1) Synaphae acutiloba, 8) Dryandra formosa, 9) Lambertia inermis, 10) Stirlingia latifolia, 1 1) Xylomelum angustifolium, 12) Conospermum bracteosum, 13) Conospermum triplinernium, 14) Molecular weight marker, 15) Macacamia integrifolia pure MiAMP2c. Lanes 1- 13 contain a variety of species, some of which show the presence of antigenically related proteins of a similar size to MiAMP2c. Other bands exhibiting higher molecular weights probably represent the larger precursor seed storage proteins from which the antimcrobial proteins are derived. Antigenically-related proteins can be seen in lanes 1, 2, 4, 6, 7, 8, 9, and 11-13. Bioassays were also performed using crude extracts from various Proteaceae species.

Specifically, extracts from Banksia robur, Banksia canei, Hakea gibbosa, Stenocarpus sinuatus, and Stirlingia latifolia have all been shown to exhibit antimicrobial activity. This activity may derive from MiAMP2 homologues since these species are related to Macadamia.

Example 13 Purification of MiAMP2c homologues in another species using antibodies raised to MiAMP2c

Based on the detection of immunologically related proteins in other species of the family Proteaceae and the presence of antimicrobial activity in crude extracts, Stenocarpus sinuatis was chosen for a large scale fractionation experiment in an attempt to isolate MiAMP2c homologues. Five kg of S.sinuatus seed was frozen in liquid nitrogen and ground in a food processor (Big Oscaar Sunbeam). The ground seed was immediately placed into 12 L of 50 mM H2SO4 extraction buffer and extracted at 4°C for 1 hour with stirring. The slurry was then centrifuged for 20 min at 10,000 g to remove particulate matter. The supernatant was then adjusted to pH 9 using a 50mM ammonia solution. PMSF and EDTA were added to final concentrations of 1 and 10 mM respectively.

The crude protein extract was applied to an anion exchange column (Amberlite IRA-938, Rohm and Haas) (3cmx90cm) equilibrated with 50 mM NH4AC pH 9.0 at a flow rate of 40 ml/min. The unbound protein comprising the basic protein fraction was collected and used in the subsequent purification steps.

The basic protein fraction was adjusted to pH 5.5 with acetic acid and then applied at 10 ml/minute over 12 h to a SP-Sepharose Fast Flow (Pharmacia) Column (5cm x 60cm) pre- equilibrated with 25mM ammonium acetate. The column was then washed for 3.5 h with 25 mM Acetate pH 5.5. Elution of bound proteins was achieved by applying a linear gradient of NH4AC from 25 mM to 2.0 M (pH 5.5) at 10 ml/min over 10 h. Absorbance of the eluate was observed at 280 nm and 100 ml fractions collected (see Figure 12).

Cation-exchange fractions that cross-reacted with the antiserum (fractions 14-28, Figure 12) were then further purified by reverse phase chromatography. Cross-reacting fractions were loaded onto a 7 μm C18 reverse phase column (Brownlee) equilibrated with 90% H2O, 10% acetonitrile and 0.1% Trifluoroacetic acid (TFA) (=100% A). Bound proteins were eluted with a linear gradient from 100%A to 100%B (5% H20, 95% acetonitrile, 0.08% TFA). The absorbance of the eluted proteins was monitored at 214nm and 280nm. The eluted proteins were dried under vacuum and resuspended in water three times to remove traces of TFA from the samples. Reverse phase protein elution fractions 20 to 61 were analysed by pooling 2 adjacent fractions and performing a western blot analysis (see Figure 13). Fractions 22-41 gave a weak positive reaction and fractions 42-57 gave a strong positive reaction to the anti-MiAMP2c antisemm. Fractions that showed antifungal activity against S.sclerotiorum at 50 μg/ml and 10 μg/ml are indicated by arrows on the chromatogram. Using the approach above, several active fractions (termed SsAMPl and SsAMP2) were obtained which were assessed for their antifungal activity against Sclerotinia sclerotiorum, Alter naria brassicola, Leptosphaeria maculans, Verticilium dahliae and Fusarium oxysporum. Bioassays were carried out as described in Example 2 and results shown in Example 15. Another fragment which reacted with MiAMP2 antisemm was purified and sequenced (SsAMP3) but insufficient protein was available for characterisation of antimicrobial activity. Partial sequences obtained from these proteins are shown in Figure 4 (SEQ ID NOS: 26, 27 and 28). Full sequencing of the peptides or cloning of cDNAs encoding the seed storage proteins from this species will reveal the extent of homology between these peptides and MiAMP2-series homologues. Example 14

Synthesis of small fragments of MiAMP2c In an effort to determine if the full MiAMP2c molecule was absolutely necessary for the protein to exhibit antimicrobial activity, two separate peptides were chemically synthesized by Auspep Pty. Ltd. (Australia). For each peptide, the cysteine residues were changed to alanine residues so that disulfide bonds were no longer capable of being formed between two separate protein chains. Tyrosine residues were also changed to alanine since it was expected that tyrosine also participated in the helix-turn-helix stabilization and this would not be needed in the synthetic peptides lacking one of the helices. Alanine is also favorable to the formation of alpha-helices so it should not interfere with the native helical stmcture to a large degree. Peptide one is comprised of 22 amino acids from 1 18 to 139 in the amino acid sequence of clone 3 (sequence: RQRDP QQQAE QAQKR AQRRE TE, SEQUENCE ID NO: 9). Peptide 2 is 25 amino acids in length and mns from 140 to 164 in clone 3 (sequence: PRHMQ IAQQR AERRA EKEKR KQQKR, SEQ ID NO: 10). Peptides 1 and 2 are labeled MiAMP2c pepl and MiAMP2c pep2 respectively. These peptides were resuspended in Milli-Q water and bioassayed against a number of fungi. As seen in Table 2, peptide 2 has inliibitoiy activity against a variety of fungi whereas peptide 1 exhibited little or no activity. Mixtures of peptide 1 and peptide 2 exhibit similar levels of activity as seen with peptide 2 alone indicating that only peptide 2 is exhibiting activity. The fact that peptide 2 exhibits antimicrobial activity in the absence of the helix-turn-helix stmcture exhibited by MiAMP2c reveals that the helix- turn-helix stmcture is not absolutely necessary for the peptides to retain activity. Nevertheless, peptide 2 did not exhibit the same degree of activity on a molar basis as MiAMP2c (whole fragment) indicating that the helix-turn-helix stmcture is important for maximal expression of antimicrobial activity by the fragments involved. It is also expected that the helix-turn-helix structure will confer greater stability to the MiAMP2 homologues, thus rendering these proteins less susceptible to proteolytic cleavage and other forms of degredation. Greater stability would lead to maintaining antimicrobial activity over a longer period of time.

Example 15 Antifungal activity of MiAMP2c homologues and fragment(s) MiAMP2c and each of the various MiAMP2 homologues were tested against a variety of fungi as concentrations ranging from 2 to 50 μg/ml. Table 1 shows the IC50 value of pure MiAMP2c against various fungi and bacteria. In the table, the ">50" indicates that 50% inhibition of the fungus was not achieved at 50 μg/ml which was the highest concentration tested. The abbreviation "ND" indicates that the test was not performed or that results could not be interpreted. The antimicrobial

2+ activity of MiAMP2c was also tested in the presence of 1 mM Ca in the test medium and the IC50 values for these tests are given in the right-hand column. As can be seen in the table, the inhibitoiy

2+ activity of MiAMP2c is greatly reduced (although not eliminated) in the presence of Ca .

Table 1

Concentrations of MiAMP2c at which 50% inhibition of growth was observed

__

Organism IC50 (μg/ml) IC50 + Ca (μg/ml)

Alternaria helianthi 5-10 ND

Candida albicans >50 >50

Ceratocystis paradoxa 20-50 >50

Cercospora nicotianae 5-10 5-10

Clavibader michiganensis 50 >50

Chalara elegans 2-5 10-20

Fusarium oxysporum 10 20-50

Sclerotinia sclerotiorum 20-50 >50

Phytophthora cryptogea 5-10 10-25

Phytophthora parasitica nicotiana 10-20 >50 Verticillium dahliae 5-10 >50 Ralstonia solanacearum >50 >50 Pseudomonas syringae tabaci >50 >50 Saccharomyces cerevisiae 20-50 >50 Escherichia coli >50 >50

Table 2 shows the the antimicrobial activity of various homologues and fragments of MiAMP2c. In the table, the following abbreviations are used: Ab, Alternaria brassicola; Cp: Ceratocystis paradoxa; Foe: Fusarium oxysporum; Lm: Leptosphaeria maculans; Ss: Sclerotinia sclerotiorum; Vd: Verticillium dahliae. The ">50" indicates that concentrations higher than 50 μg/ml were not tested so that an IC50 value could not be established. A blank space indicates that the test was not performed or that results could not be interpreted.

The TcAMPl and 2 used for the results presented in Table 2 were derived from cocoa vicilin (Examples 10 and 1 1). SsAMPl and 2 show reactivity with MiAMP2c antibodies and also exhibit antimicrobial activity as seen in the table below. The versions of MiAMP2a, b and d as well as

TcAMPl and TcAMP2 tested in the bioassays all contain a His tag fusion resulting from expression in the vector pET16b. MiAMP2c pepl and 2 are the N and C terminal regions, respectively, of MiAMP2c antimicrobial peptide as specified in Example 14 above. The concentration value listed for 'MiAMP2c pepl+2' is the concentration of each individual peptide in the mixture. It should be remembered that MiAMP2c pepl and pep2 are both about '/> the size of MiAMP2c; comparisons of the activity of these peptides with the MiAMP2c protein should, therefore, be made on a molar basis rather than on a strict μg/ml concentration basis. Peptides were only tested in media A which did not contain added Ca 2+ .

Table 2 IC50 values (μg/ml) of MiAMP2 related proteins against various fungi

Peptide tested Fungus used in bioassy

Ab Cp Foe Lm Ss Vd

MiAMP2a 5-10 2.5-5 5-10 MiAMP2b 2.5 2.5 5-10 MiAMP2c 20-50 10 20-50 5-10 MiAMP2d 5 2.5 5-10 MiAMP2c pepl 100 >50 MiAMP2c pep2 10-20 10-20 50 10-20

MiAMP2c pep 1+2 10-25 50

TcAMPl 10 5-10 2-5 10 5-20

TcAMP2 5-10 5-10 2-5 5 5-20

SsAMPl 20-50 20-50 20-50 10-20

SsAMP2 20-50 >50 >50 >50 >50

It is worthy of note that while the TcAMPl and 2 sequences are readily available in the public data bases, no antimicrobial activity had ever been assigned to them. These sequences were derived from much larger proteins involved in seed storage functions. The inventors have thus described a completely new activity for a small portion of the overall cocoa vicilin molecules. The activity of cotton fragments 1, 2, and 3 has been exemplified by other authors (Chung, R. P.T. et al. [1997] Plant Science 127: 1-16).

Example 16 Construction of the plant transfomation vector PCV91 -MiAMP2c The expression vector pPCV91 -MiAMP2c (Figure 14) contains the full coding region of the

MiAMP2c (Example 7) DNA flanked at it 5' end by the strong constitutive promoter of 35S RNA from the cauliflower mosaic vims (pCaMV35S) (Odel et al, [1985] Nature 313: 810-812) with a quadruple-repeat enhancer element (e-35S) to allow for high transcriptional activity (Kay et al. [1987] Science 236: 1299-1302). The coding region of MiAMP2c DNA is flanked at its 3' end by the polyadenylation sequence of 35S RNA of the cauliflower mosaic vims (pA35S). The plasmid backbone of this vector is the plasmid pPCV91 (Walden, R. et al. [1990] Methods Mol. Cell. Biol. 1 : 175-194). The plasmid also contains other elements useful for plant transformation such as an ampicillin resistance gene (bla) and a hygromycin resistance gene (hph) driven by the nos promoter (pnos). These and other features allow for selection in various cloning and transformation procedures. The plasmid pPCV91 -Mi AMP2c was constmcted as follows: A cloned fragment encoding MiAMP2c (Example 7) was digested using restriction enzymes to release the MiAMP2c gene fragment containing a synthetic leader sequence.. The binaiy vector pPCV91 was digested with the restriction enzyme Bam HI. Both the MiAMP2c DNA fragment containing and the binary vector were ligated using T4 DNA ligase to produce pPCV91-MiAMP2c binary vector for plant transformation (Figure 12).

Using this approach, other homologues of MiAMP2c can be expressed in plants. Not only can individual homologues be expressed, but they may be expressed in combination with other proteins as fusion proteins or as portions of larger precursor proteins. For example, it is possible to express the N-teimmal legion of MιAMP2 clone 1 (ammo acids 1 to -246) which contains a signal peptide and the hydrophilic l egion containing foui antimicrobial segments Transgenic plants can then be assessed to examine whether the individual fragments are being processed into the expected fiagments by the piocessmg machinery already present m the plant cells It is also possible to expiess the entne MιAMP2 clone 1 (ammo acids 1 to 666) and to examine the piocessmg of the entne piotem when expiessed in transgenic plants Homologous legions fiom other sequences can also be used m multiple combinations with, for example, ten (10) or more MιAMP2-hke fiagments expiessed as one laige fusion protein with acidic cleavage sites located as propei locations between each of the fragments As well as linking MιAMP2 fragments together, it would also be possible to link MιAMP2 fiagments to other useful proteins for expression in plants

Example 17 Tiansgemc plants expressing MιAMP2c (or related fragments) The disaimed Agrobaderium tumefaciens strain GV3101 (pMP90RK) (Koncz, Cs [1986] Mol Gen Genet 204 383-396) was transformed with the vector pPCV91-MιAMP2c (Example 16) using the method of Walkei peach et α/ (Plant Mol Biol Manual Bl 1-19 [1994]) adapted fiom Van Haute et al (EMBO J 2 41 1-417 1983])

Tobacco tiansformation was carried out using leaf discs of Nicottana tabacum based on the method of Hoisch et al (Science 227 1229-1231 [1985]) and co-cultuπng strains containing pPCV91 -MιAMP2c After co-cultivation of Agrobaderium and tobacco leaf disks, transgenic plants (tiansfoimed with pPCV91-MιAMP2c) were regenerated on media containing 50 μg/ml hygiomycm and 500 μg/ml Cefotaxime These tiansgemc plants weie analysed for expiession of the newly- mtroduced genes using standaid western blotting techniques (Figure 15) Figure 15 shows a western blot of extiacts fiom trangenic tobacco carrying the constmct foi MιAMP2c from example 16 Lane 1 contains pure MιAMP2c as a standaid, lanes 2 and 3 contain extracts from transgenic plants caπymg the pPCV91-MιAMP2c construct As can be see in the figure, faint bands are piesent at appioximately the conect molecular weight, indicating that the transgenic plants appeal to be expressing the MιAMP2c protein Plants capable of constitutive expression of the mtioduced genes may be selected and self -pollinated to give seed FI seedlings of the transgenic plants may be further analysed Example 18

MιAMP2c Homologues Every homologue of MιAMP2c that has been tested has exhibited some antimici obial activity This evidence indicates that other homologues will also exhibit antimici obial activity These homologues include fragments from 1) peanut (Burks, A W et al [1995] J Clin fnvest 96 (4), 1715-1721), 2) maize (Belanger, F.C. and Kriz, A.L.[1991] Genetics 129 (3), 863-872), 3) barley (Heck, G.R. et al. [1993] Mol. Gen. Genet. 239 (1-2), 209-218), and 4) soybean (Sebastiani, F.L. et al. [1990] Plant Mol. Biol. 15 (1), 197-201). (see SEQ ID NOS: 21, 22, 24, and 25). Other sequences derived from seed storage proteins of the 7S class are also expected to yield homologues of MiAMP2 proteins.

SEQUENCE LISTINGS

(1) GENERAL INFORMATION:

(i) APPLICANT:

(A) NAME: COOPERATIVE RESEARCH CENTRE FOR TROPICAL PLANT PATHOLOGY (B) STREET: The University of Queensland

(C) CITY: St Lucia

(D) STATE: Queensland

(E) COUNTRY: Australia

(F) POSTAL CODE (ZIP) : 4067

(ii) TITLE OF INVENTION: Antimicrobial Protein

(iii) NUMBER OF SEQUENCES: 28

(iv) COMPUTER READABLE FORM:

(A) MEDIUM TYPE: Floppy disk

(B) COMPUTER: IBM PC compatible

(C) OPERATING SYSTEM: PC-DOS/MS-DOS (D) SOFTWARE: Patentin Release #1.0, Version #1.30 (EPO)

(2) INFORMATION FOR SEQ ID NO : 1:

(i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 666 amino acids

(B) TYPE: amino acid

(C) STRANDEDNESS: single

(D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein

(vi ) ORIGINAL SOURCE:

(A) ORGANISM: Macadamia integrifolia (F) TISSUE TYPE: Seeds

(xi) SEQUENCE DESCRIPTION: SEQ ID NO : 1:

Met Ala lie Asn Thr Ser Asn Leu Cys Ser Leu Leu Phe Leu Leu Ser 1 5 10 15

Leu Phe Leu Leu Ser Thr Thr Val Ser Leu Ala Glu Ser Glu Phe Asp 20 25 30

Arg Gin Glu Tyr Glu Glu Cys Lys Arg Gin Cys Met Gin Leu Glu Thr 35 40 45

Ser Gly Gin Met Arg Arg Cys Val Ser Gin Cys Asp Lys Arg Phe Glu 50 55 60 Glu Asp lie Asp Trp Ser Lys Tyr Asp Asn Gin Glu Asp Pro Gin Thr 65 70 75 80

Glu Cys Gin Gin Cys Gin Arg Arg Cys Arg Gin Gin Glu Ser Gly Pro 85 90 95

Arg Gin Gin Gin Tyr Cys Gin Arg Arg Cys Lys Glu lie Cys Glu Glu 100 105 110

Glu Glu Glu Tyr Asn Arg Gin Arg Asp Pro Gin Gin Gin Tyr Glu Gin 115 120 125

Cys Gin Lys His Cys Gin Arg Arg Glu Thr Glu Pro Arg His Met Gin 130 135 140 Thr Cys Gin Gin Arg Cys Glu Arg Arg Tyr Glu Lys Glu Lys Arg Lys 145 150 155 160

Gin Gin Lys Arg Tyr Glu Glu Gin Gin Arg Glu Asp Glu Glu Lys Tyr 165 170 175

Glu Glu Arg Met Lys Glu Glu Asp Asn Lys Arg Asp Pro Gin Gin Arg 180 185 190

Glu Tyr Glu Asp Cys Arg Arg Arg Cys Glu Gin Gin Glu Pro Arg Gin 195 200 205

Gin His Gin Cys Gin Leu Arg Cys Arg Glu Gin Gin Arg Gin His Gly 210 215 220

Arg Gly Gly Asp Met Met Asn Pro Gin Arg Gly Gly Ser Gly Arg Tyr 225 230 235 240

Glu Glu Gly Glu Glu Glu Gin Ser Asp Asn Pro Tyr Tyr Phe Asp Glu 245 250 255

Arg Ser Leu Ser Thr Arg Phe Arg Thr Glu Glu Gly His lie Ser Val 260 265 270

Leu Glu Asn Phe Tyr Gly Arg Ser Lys Leu Leu Arg Ala Leu Lys Asn 275 280 285

Tyr Arg Leu Val Leu Leu Glu Ala Asn Pro Asn Ala Phe Val Leu Pro 290 295 300 Thr His Leu Asp Ala Asp Ala lie Leu Leu Val lie Gly Gly Arg Gly 305 310 315 320

Ala Leu Lys Met lie His His Asp Asn Arg Glu Ser Tyr Asn Leu Glu 325 330 335

Cys Gly Asp Val lie Arg lie Pro Ala Gly Thr Thr Phe Tyr Leu lie 340 345 350

Asn Arg Asp Asn Asn Glu Arg Leu His lie Ala Lys Phe Leu Gin Thr 355 360 365 lie Ser Thr Pro Gly Gin Tyr Lys Glu Phe Phe Pro Ala Gly Gly Gin 370 375 380

Asn Pro Glu Pro Tyr Leu Ser Thr Phe Ser Lys Glu lie Leu Glu Ala 385 390 395 400

Ala Leu Asn Thr Gin Thr Glu Lys Leu Arg Gly Val Phe Gly Gin Gin 405 410 415 Arg Glu Gly Val He He Arg Ala Ser Gin Glu Gin He Arg Glu Leu

420 425 430

Thr Arg Asp Asp Ser Glu Ser Arg His Trp His He Arg Arg Gly Gly 435 440 445

Glu Ser Ser Arg Gly Pro Tyr Asn Leu Phe Asn Lys Arg Pro Leu Tyr 450 455 460

Ser Asn Lys Tyr Gly Gin Ala Tyr Glu Val Lys Pro Glu Asp Tyr Arg 465 470 475 480

Gin Leu Gin Asp Met Asp Leu Ser Val Phe He Ala Asn Val Thr Gin 485 490 495 Gly Ser Met Met Gly Pro Phe Phe Asn Thr Arg Ser Thr Lys Val Val

500 505 510

Val Val Ala Ser Gly Glu Ala Asp Val Glu Met Ala Cys Pro His Leu 515 520 525

Ser Gly Arg His Gly Gly Arg Gly Gly Gly Lys Arg His Glu Glu Glu 530 535 540

Glu Asp Val His Tyr Glu Gin Val Arg Ala Arg Leu Ser Lys Arg Glu 545 550 555 560

Ala He Val Val Leu Ala Gly His Pro Val Val Phe Val Ser Ser Gly 565 570 575 Asn Glu Asn Leu Leu Leu Phe Ala Phe Gly He Asn Ala Gin Asn Asn

580 585 590

His Glu Asn Phe Leu Ala Gly Arg Glu Arg Asn Val Leu Gin Gin He 595 600 605

Glu Pro Gin Ala Met Glu Leu Ala Phe Ala Ala Pro Arg Lys Glu Val 610 615 620

Glu Glu Ser Phe Asn Ser Gin Asp Gin Ser He Phe Phe Pro Gly Pro 625 630 635 640

Arg Gin His Gin Gin Gin Ser Pro Arg Ser Thr Lys Gin Gin Gin Pro

645 650 655 Leu Val Ser He Leu Asp Phe Val Gly Phe

660 665 (2) INFORMATION FOR SEQ ID NO : 2:

(i) SEQUENCE CHARACTERISTICS:

(A) LENGTH: 2171 base pairs

(B) TYPE: nucleic acid

(C) STRANDEDNESS: single

(D) TOPOLOGY: linear

(ii) MOLECULE TYPE: cDNA

(vi) ORIGINAL SOURCE:

(A) ORGANISM: Macadamia integrifolia (F) TISSUE TYPE: Seeds

(ix) FEATURE:

(A) NAME/KEY: sig_peptide (B) LOCATION: 1..85

(x) FEATURE:

(A) NAME/KEY: mat_peptide

(B) LOCATION: 86..1999

(xi) SEQUENCE DESCRIPTION: SEQ ID NO : 2:

ATGGCGATCA ATACATCAAA TTTATGTTCT CTTCTCTTTC TCCTTTCACT CTTCCTTCTG 60 TCTACGACAG TGTCTCTTGC TGAAAGTGAA TTTGACAGGC AGGAATATGA GGAGTGCAAA 120

CGGCAATGCA TGCAGTTGGA GACATCAGGC CAGATGCGTC GGTGTGTGAG TCAGTGCGAT 180

AAGAGATTTG AAGAGGATAT AGATTGGTCT AAGTATGATA ACCAAGAGGA TCCTCAGACG 240

GAATGCCAAC AATGCCAGAG GCGATGCAGG CAGCAGGAGA GTGGCCCACG TCAGCAACAA 300

TACTGCCAAC GACGCTGCAA GGAAATATGT GAAGAAGAAG AAGAATATAA CCGACAACGT 360 GATCCACAGC AGCAATACGA GCAATGTCAG AAGCACTGCC AACGGCGCGA GACAGAGCCA 420

CGTCACATGC AAACATGTCA ACAACGCTGC GAGAGGAGAT ATGAAAAGGA GAAACGTAAG 480

CAACAAAAGA GATATGAAGA GCAACAACGT GAAGACGAAG AGAAATATGA AGAGCGAATG 540

AAGGAAGAAG ATAACAAACG CGATCCACAA CAAAGAGAGT ACGAAGACTG CCGGAGGCGC 600

TGCGAACAAC AGGAGCCACG TCAGCAGCAC CAGTGCCAGC TAAGATGCCG AGAGCAGCAG 660 AGGCAACACG GCCGAGGTGG CGATATGATG AACCCTCAGA GGGGAGGCAG CGGCAGATAC 720

GAGGAGGGAG AAGAGGAGCA AAGCGACAAC CCCTACTACT TCGACGAACG AAGCTTAAGT 780

ACAAGGTTCA GGACCGAGGA AGGCCACATC TCAGTTCTGG AGAACTTCTA TGGTAGATCC 840

AAGCTTCTAC GCGCACTAAA AAACTATCGC TTGGTGCTCC TCGAGGCTAA CCCCAACGCC 900 TTCGTGCTCC CTACCCACTT GGATGCAGAT GCCATTCTCT TGGTCATAGG AGGGAGAGGA 960

GCCCTCAAAA TGATCCACCA CGACAACAGA GAATCCTACA ACCTCGAGTG TGGAGACGTA 1020

ATCAGAATCC CAGCTGGAAC CACATTCTAC TTAATCAACC GAGACAACAA CGAGAGGCTC 1080

CACATAGCCA AGTTCTTACA GACCATATCC ACTCCTGGCC AATACAAGGA ATTCTTCCCA 1140 GCTGGAGGCC AAAACCCAGA GCCGTACCTC AGTACCTTCA GCAAAGAGAT TCTCGAGGCT 1200

GCGCTCAACA CACAAACAGA GAAGCTGCGT GGGGTGTTTG GACAGCAAAG GGAGGGAGTG 1260

ATAATTAGGG CGTCACAGGA GCAGATCAGG GAGTTGACTC GAGATGACTC AGAGTCACGA 1320

CACTGGCATA TAAGGAGAGG TGGTGAATCA AGCAGGGGAC CTTACAATCT GTTCAACAAA 1380

AGGCCACTGT ACTCCAACAA ATACGGTCAA GCCTACGAAG TCAAACCTGA GGACTACAGG 1440 CAACTCCAAG ACATGGACTT ATCGGTTTTC ATAGCCAACG TCACCCAGGG ATCCATGATG 1500

GGTCCCTTCT TCAACACTAG GTCTACAAAG GTGGTAGTGG TGGCTAGTGG AGAGGCAGAT 1560

GTGGAAATGG CATGCCCTCA CTTGTCGGGA AGACACGGCG GCCGCGGTGG AGGAAAAAGG 1620

CATGAGGAGG AAGAGGATGT GCACTATGAG CAGGTTAGAG CACGTTTGTC GAAGAGAGAG 1680

GCCATTGTTG TTCTGGCAGG TCATCCCGTC GTCTTCGTTT CATCCGGAAA CGAGAACCTG 1740 CTGCTTTTTG CATTTGGAAT CAATGCCCAA AACAACCACG AGAACTTCCT CGCGGGGAGA 1800

GAGAGGAACG TGCTGCAGCA GATAGAGCCA CAGGCAATGG AGCTAGCGTT TGCCGCTCCA 1860

AGGAAAGAGG TAGAAGAGTC ATTTAACAGC CAGGACCAGT CTATCTTCTT TCCTGGGCCC 1920

AGGCAGCACC AGCAACAGTC GCCCCGCTCC ACCAAGCAAC AACAGCCTCT CGTCTCCATT 1980

CTGGACTTCG TTGGCTTCTA AAGTTCCACA AAAAAGAGTG TGTTATGTAG TATAGGTTAG 2040 TAGCTCCTAG CTCGGTGTAT GAGAGTGGTA AGAGACTAAG ACGCTAAATC CCTAAGTAAC 2100

TAACCTGGCG AGCTTGCGTG TATGCAAATA AAGAGGAACA GCTTTCCAAC TTTAAAAAAA 2160

AAAAAAAAAA A 2171

(2) INFORMATION FOR SEQ ID NO : 3:

(i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 666 amino acids

(B) TYPE: amino acid

(C) STRANDEDNESS: single

(D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (vi) ORIGINAL SOURCE:

(A) ORGANISM: Macadamia integrifolia

(F) TISSUE TYPE: Seeds

( x) FEATURE:

(A) NAME/KEY: sig_peptide

(B) LOCATION: 1..28 (IX) FEATURE:

(A) NAME/KEY: mat_peptide

(B) LOCATION: 29..666

(xi) SEQUENCE DESCRIPTION: SEQ ID NO: 3:

Met Ala He Asn Thr Ser Asn Leu Cys Ser Leu Leu Phe Leu Leu Ser 1 5 10 15

Leu Phe Leu Leu Ser Thr Thr Val Ser Leu Ala Glu Ser Glu Phe Asp 20 25 30

Arg Gin Glu Tyr Glu Glu Cys Lys Arg Gin Cys Met Gin Leu Glu Thr 35 40 45 Ser Gly Gin Met Arg Arg Cys Val Ser Gin Cys Asp Lys Arg Phe Glu 50 55 60

Glu Asp He Asp Trp Ser Lys Tyr Asp Asn Gin Asp Asp Pro Gin Thr 65 70 75 80

Asp Cys Gin Gin Cys Gin Arg Arg Cys Arg Gin Gin Glu Ser Gly Pro 85 90 95

Arg Gin Gin Gin Tyr Cys Gin Arg Arg Cys Lys Glu He Cys Glu Glu 100 105 110

Glu Glu Glu Tyr Asn Arg Gin Arg Asp Pro Gin Gin Gin Tyr Glu Gin 115 120 125

Cys Gin Glu Arg Cys Gin Arg His Glu Thr Glu Pro Arg His Met Gin 130 135 140

Thr Cys Gin Gin Arg Cys Glu Arg Arg Tyr Glu Lys Glu Lys Arg Lys 145 150 155 160

Gin Gin Lys Arg Tyr Glu Glu Gin Gin Arg Glu Asp Glu Glu Lys Tyr 165 170 175

Glu Glu Arg Met Lys Glu Glu Asp Asn Lys Arg Asp Pro Gin Gin Arg 180 185 190

Glu Tyr Glu Asp Cys Arg Arg Arg Cys Glu Gin Gin Glu Pro Arg Gin 195 200 205 Gin Tyr Gin Cys Gin Arg Arg Cys Arg Glu Gin Gin Arg Gin His Gly 210 215 220 Arg Gly Gly Asp Leu He Asn Pro Gin Arg Gly Gly Ser Gly Arg Tyr 225 230 235 240

Glu Glu Gly Glu Glu Lys Gin Ser Asp Asn Pro Tyr Tyr Phe Asp Glu 245 250 255

Arg Ser Leu Ser Thr Arg Phe Arg Thr Glu Glu Gly His He Ser Val 260 265 270

Leu Glu Asn Phe Tyr Gly Arg Ser Lys Leu Leu Arg Ala Leu Lys Asn 275 280 285

Tyr Arg Leu Val Leu Leu Glu Ala Asn Pro Asn Ala Phe Val Leu Pro 290 295 300

Thr His Leu Asp Ala Asp Ala He Leu Leu Val Thr Gly Gly Arg Gly 305 310 315 320 Ala Leu Lys Met He His Arg Asp Asn Arg Glu Ser Tyr Asn Leu Glu

325 330 335

Cys Gly Asp Val He Arg He Pro Ala Gly Thr Thr Phe Tyr Leu He 340 345 350

Asn Arg Asp Asn Asn Glu Arg Leu His He Ala Lys Phe Leu Gin Thr 355 360 365

He Ser Thr Pro Gly Gin Tyr Lys Glu Phe Phe Pro Ala Gly Gly Gin 370 375 380

Asn Pro Glu Pro Tyr Leu Ser Thr Phe Ser Lys Glu He Leu Glu Ala 385 390 395 400 Ala Leu Asn Thr Gin Ala Glu Arg Leu Arg Gly Val Leu Gly Gin Gin

405 410 415

Arg Glu Gly Val He He Ser Ala Ser Gin Glu Gin He Arg Glu Leu 420 425 430

Thr Arg Asp Asp Ser Glu Ser Arg Arg Trp His He Arg Arg Gly Gly 435 440 445

Glu Ser Ser Arg Gly Pro Tyr Asn Leu Phe Asn Lys Arg Pro Leu Tyr 450 455 460

Ser Asn Lys Tyr Gly Gin Ala Tyr Glu Val Lys Pro Glu Asp Tyr Arg 465 470 475 480 Gin Leu Gin Asp Met Asp Val Ser Val Phe He Ala Asn He Thr Gin

485 490 495

Gly Ser Met Met Gly Pro Phe Phe Asn Thr Arg Ser Thr Lys Val Val 500 505 510

Val Val Ala Ser Gly Glu Ala Asp Val Glu Met Ala Cys Pro His Leu 515 520 525

Ser Gly Arg His Gly Gly Arg Arg Gly Gly Lys Arg His Glu Glu Glu 530 535 540

Glu Asp Val His Tyr Glu Gin Val Lys Ala Arg Leu Ser Lys Arg Glu 545 550 555 560

Ala He Val Val Pro Val Gly His Pro Val Val Phe Val Ser Ser Gly 565 570 575

Asn Glu Asn Leu Leu Leu Phe Ala Phe Gly He Asn Ala Gin Asn Asn 580 585 590 His Glu Asn Phe Leu Ala Gly Arg Glu Arg Asn Val Leu Gin Gin He 595 600 605

Glu Pro Gin Ala Met Glu Leu Ala Phe Ala Ala Pro Arg Lys Glu Val 610 615 620

Glu Glu Leu Phe Asn Ser Gin Asp Glu Ser He Phe Phe Pro Gly Pro 625 630 635 640

Arg Gin His Gin Gin Gin Ser Ser Arg Ser Thr Lys Gin Gin Gin Pro 645 650 655

Leu Val Ser He Leu Asp Phe Val Gly Phe 660 665

(2) INFORMATION FOR SEQ ID NO : 4:

(i) SEQUENCE CHARACTERISTICS:

(A) LENGTH: 2171 base pairs (B) TYPE: nucleic acid

(C) STRANDEDNESS: single

(D) TOPOLOGY: linear

(ii) MOLECULE TYPE: cDNA

(vi) ORIGINAL SOURCE:

(A) ORGANISM: Macadamia integrifolia (F) TISSUE TYPE: Seeds

(ix) FEATURE:

(A) NAME/KEY: sig_peptide

(B) LOCATION: 1..86 (ix) FEATURE:

(A) NAME/KEY: mat_peptide

(B) LOCATION: 87..1999

(xi) SEQUENCE DESCRIPTION: SEQ ID NO : 4: ATGGCGATCA ATACATCAAA TTTATGTTCT CTTCTCTTTC TCCTTTCCCT CTTCCTTCTG 60 TCAACGACAG TGTCTCTTGC TGAAAGTGAA TTTGACAGGC AGGAATATGA GGAGTGCAAA 120

CGGCAATGCA TGCAGTTGGA GACATCAGGC CAGATGCGTC GGTGTGTGAG TCAGTGCGAT 180

AAGAGATTTG AAGAGGATAT AGATTGGTCT AAGTATGATA ACCAAGACGA TCCTCAGACG 240

GATTGCCAAC AATGCCAGAG GCGATGCAGG CAGCAGGAGA GTGGCCCACG TCAGCAACAA 300 TACTGCCAAC GACGCTGCAA GGAAATATGT GAAGAAGAAG AAGAATATAA CCGACAACGT 360

GATCCACAGC AGCAATACGA GCAATGTCAG GAGCGCTGCC AACGGCACGA GACAGAGCCA 420

CGTCACATGC AAACATGTCA ACAACGCTGC GAGAGGAGAT ATGAAAAGGA GAAACGTAAG 480

CAACAAAAGA GATATGAAGA GCAACAACGT GAAGACGAAG AGAAATATGA AGAGCGAATG 540

AAGGAAGAAG ATAACAAACG CGATCCACAA CAAAGAGAGT ACGAAGACTG CCGGAGGCGC 600 TGCGAACAAC AGGAGCCACG TCAGCAGTAC CAGTGCCAGC GAAGATGCCG AGAGCAGCAG 660

AGGCAACACG GCCGAGGTGG TGATTTGATT AACCCTCAGA GGGGAGGCAG CGGCAGATAC 720

GAGGAGGGAG AAGAGAAGCA AAGCGACAAC CCCTACTACT TCGACGAACG AAGCTTAAGT 780

ACAAGGTTCA GGACCGAGGA AGGCCACATC TCAGTTCTGG AGAACTTCTA TGGTAGATCC 840

AAGCTTCTAC GCGCACTAAA AAACTATCGC TTGGTGCTCC TCGAGGCTAA CCCCAACGCC 900 TTCGTGCTCC CTACCCACTT GGACGCAGAT GCCATTCTCT TGGTCACCGG AGGGAGAGGA 960

GCCCTCAAAA TGATCCACCG TGACAACAGA GAATCCTACA ACCTCGAGTG TGGAGACGTA 1020

ATCAGAATCC CAGCTGGAAC CACATTCTAC TTAATCAACC GAGACAACAA CGAGAGGCTC 1080

CACATAGCCA AGTTCTTACA GACCATATCC ACTCCTGGCC AATACAAGGA ATTCTTCCCA 1140

GCTGGAGGCC AAAACCCAGA GCCGTACCTC AGTACCTTCA GCAAAGAGAT TCTCGAGGCT 1200 GCGCTCAACA CACAAGCAGA GAGGCTGCGT GGGGTGCTTG GACAGCAAAG GGAGGGAGTG 1260

ATAATTAGTG CGTCACAGGA GCAGATCAGG GAGTTGACTC GAGATGACTC AGAGTCACGA 1320

CGCTGGCATA TAAGGAGAGG TGGTGAATCA AGCAGGGGAC CTTACAATCT GTTCAACAAA 1380

AGGCCACTGT ACTCCAACAA ATACGGTCAA GCCTACGAAG TCAAACCTGA GGACTACAGG 1440

CAACTCCAAG ACATGGACGT ATCGGTTTTC ATAGCCAACA TCACCCAGGG ATCCATGATG 1500 GGTCCCTTCT TCAACACTAG GTCTACAAAG GTGGTAGTGG TGGCTAGTGG AGAGGCAGAT 1560

GTGGAAATGG CATGCCCTCA CTTGTCGGGA AGACACGGCG GCCGCCGTGG AGGGAAAAGG 1620

CATGAGGAGG AAGAGGATGT GCACTATGAG CAGGTTAAAG CACGTTTGTC GAAGAGAGAG 1680

GCCATTGTTG TTCCGGTAGG TCATCCCGTC GTCTTCGTTT CATCCGGAAA CGAGAACCTG 1740 CTGCTTTTTG CATTTGGAAT CAATGCCCAA AACAACCACG AGAACTTCCT CGCGGGGAGA 1800

GAGAGGAACG TGCTGCAGCA GATAGAGCCA CAGGCAATGG AGCTAGCGTT TGCCGCTCCA 1860

AGGAAAGAGG TAGAAGAGTT ATTTAACAGC CAGGACGAGT CTATCTTCTT TCCTGGGCCC 1920

AGGCAGCACC AGCAACAGTC TTCCCGCTCC ACCAAGCAAC AACAGCCTCT CGTCTCCATT 1980 CTGGACTTCG TTGGCTTCTA AAGTTCTACA AAAAAGAGTG TGTTATGTAG TATAGGTTAG 2040

TAGCTCCTAG CTCGGTGTAT GCGAGTGGTA AGAGACCAAG ACGCTAAATC CCTAAGTAAC 2100

TAACCTGGCG AGCTTGCGTG TATGCAAATA AAGAGGAACA GCTTTCCAAC TTTAAAAAAA 2160

AAAAAAAAAA A 2171

(2) INFORMATION FOR SEQ ID NO: 5 :

(i) SEQUENCE CHARACTERISTICS:

(A) LENGTH: 625 amino acids

(B) TYPE: amino acid

(C) STRANDEDNESS: single (D) TOPOLOGY: linear

(ii) MOLECULE TYPE: protein

(vi) ORIGINAL SOURCE: (A) ORGANISM: Macadamia integrifolia (F) TISSUE TYPE: Seeds

(ix) FEATURE:

(A) NAME/KEY: partial mat_peptide (B) LOCATION :1..625

(xi) SEQUENCE DESCRIPTION: SEQ ID NO : 5:

Gin Cys Met Gin Leu Glu Thr Ser Gly Gin Met Arg Arg Cys Val Ser 1 5 10 15

Gin Cys Asp Lys Arg Phe Glu Glu Asp He Asp Trp Ser Lys Tyr Asp 20 25 30 Asn Gin Glu Asp Pro Gin Thr Glu Cys Gin Gin Cys Gin Arg Arg Cys 35 40 45

Arg Gin Gin Glu Ser Asp Pro Arg Gin Gin Gin Tyr Cys Gin Arg Arg 50 55 60

Cys Lys Glu He Cys Glu Glu Glu Glu Glu Tyr Asn Arg Gin Arg Asp 65 70 75 80

Pro Gin Gin Gin Tyr Glu Gin Cys Gin Lys Arg Cys Gin Arg Arg Glu 85 90 95 Thr Glu Pro Arg His Met Gin He Cys Gin Gin Arg Cys Glu Arg Arg 100 105 110

Tyr Glu Lys Glu Lys Arg Lys Gin Gin Lys Arg Tyr Glu Glu Gin Gin 115 120 125

Arg Glu Asp Glu Glu Lys Tyr Glu Glu Arg Met Lys Glu Gly Asp Asn 130 135 140 Lys Arg Asp Pro Gin Gin Arg Glu Tyr Glu Asp Cys Arg Arg His Cys 145 150 155 160

Glu Gin Gin Glu Pro Arg Leu Gin Tyr Gin Cys Gin Arg Arg Cys Gin 165 170 175 180

Glu Gin Gin Arg Gin His Gly Arg Gly Gly Asp Leu Met Asn Pro Gin 185 190 195

Arg Gly Gly Ser Gly Arg Tyr Glu Glu Gly Glu Glu Lys Gin Ser Asp 200 205 210

Asn Pro Tyr Tyr Phe Asp Glu Arg Ser Leu Ser Thr Arg Phe Arg Thr 215 220 225 Glu Glu Gly His He Ser Val Leu Glu Asn Phe Tyr Gly Arg Ser Lys 230 235 240 245

Leu Leu Arg Ala Leu Lys Asn Tyr Arg Leu Val Leu Leu Glu Ala Asn 250 255 260

Pro Asn Ala Phe Val Leu Pro Thr His Leu Asp Ala Asp Ala He Leu 265 270 275

Leu Val He Gly Gly Arg Gly Ala Leu Lys Met He His Arg Asp Asn 280 285 290

Arg Glu Ser Tyr Asn Leu Glu Cys Gly Asp Val He Arg He Pro Ala 295 300 305 Gly Thr Thr Phe Tyr Leu He Asn Arg Asp Asn Asn Glu Arg Leu His 310 315 320 325

He Ala Lys Phe Leu Gin Thr He Ser Thr Pro Gly Gin Tyr Lys Glu 330 335 340

Phe Phe Pro Ala Gly Gly Gin Asn Pro Glu Pro Tyr Leu Ser Thr Phe 345 350 355

Ser Lys Glu He Leu Glu Ala Ala Leu Asn Thr Gin Thr Glu Arg Leu 360 365 370

Arg Gly Val Leu Gly Gin Gin Arg Glu Gly Val He He Arg Ala Ser 375 380 385 Gin Glu Gin He Arg Glu Leu Thr Arg Asp Asp Ser Glu Ser Arg Arg 390 395 400 405 Trp His He Arg Arg Gly Gly Glu Ser Ser Arg Gly Pro Tyr Asn Leu 410 415 420

Phe Asn Lys Arg Pro Leu Tyr Ser Asn Lys Tyr Gly Gin Ala Tyr Glu 425 430 435

Val Lys Pro Glu Asp Tyr Arg Gin Leu Gin Asp Met Asp Val Ser Val 440 445 450

Phe He Ala Asn He Thr Gin Gly Ser Met Met Gly Pro Phe Phe Asn 455 460 470

Thr Arg Ser Thr Lys Val Val Val Val Ala Ser Gly Glu Ala Asp Val 480 485 490 500

Glu Met Ala Cys Pro His Leu Ser Gly Arg His Gly Gly Arg Gly Gly 505 510 515

Gly Lys Arg His Glu Glu Glu Glu Glu Val His Tyr Glu Gin Val Arg 520 525 530

Ala Arg Leu Ser Lys Arg Glu Ala He Val Val Leu Ala Gly His Pro 535 540 545

Val Val Phe Val Ser Ser Gly Asn Glu Asn Leu Leu Leu Phe Ala Phe 550 555 560

Gly He Asn Ala Gin Asn Asn His Glu Asn Phe Leu Ala Gly Arg Glu 565 570 575 580

Arg Asn Val Leu Gin Gin He Glu Pro Gin Ala Met Glu Leu Ala Phe 585 590 595 Ala Ala Ser Arg Lys Glu Val Glu Glu Leu Phe Asn Ser Gin Asp Glu

600 605 610

Ser He Phe Phe Pro Gly Pro Arg Gin His Gin Gin Gin Ser Pro Arg 615 620 625

Ser Thr Lys Gin Gin Gin Pro Leu Val Ser He Leu Asp Phe Val Gly

630 635 640

Phe (2) INFORMATION FOR SEQ ID NO : 6:

(i) SEQUENCE CHARACTERISTICS:

(A) LENGTH: 2140 base pairs

(B) TYPE: nucleic acid (C) STRANDEDNESS: single

(D) TOPOLOGY: linear

(ii) MOLECULE TYPE: cDNA (vi) ORIGINAL SOURCE:

(A) ORGANISM: Macadamia integrifolia (F) TISSUE TYPE: Seeds

(x) FEATURE:

(A) NAME/KEY: partial mat_peptide

(B) LOCATION: 1..1875

(xi) SEQUENCE DESCRIPTION: SEQ ID NO : 6:

CAATGCATGC AGTTAGAGAC ATCAGGCCAG ATGCGTCGGT GTGTGAGTCA GTGCGATAAG 60

AGATTTGAAG AGGATATAGA TTGGTCTAAG TATGATAACC AAGAGGATCC TCAGACGGAA 120

TGCCAACAAT GCCAGAGGCG ATGCAGGCAG CAGGAGAGTG ACCCACGTCA GCAACAATAC 180 TGCCAACGAC GCTGCAAGGA AATATGTGAA GAAGAAGAAG AATATAACCG ACAACGTGAT 240

CCACAGCAGC AATACGAGCA ATGTCAGAAG CGCTGCCAAC GGCGCGAGAC AGAGCCACGT 300

CACATGCAAA TATGTCAACA ACGCTGCGAG AGGAGATATG AAAAGGAGAA ACGTAAGCAA 360

CAAAAGAGAT ATGAAGAGCA ACAACGTGAA GACGAAGAGA AATATGAAGA GCGAATGAAG 420

GAAGGAGATA ACAAACGCGA TCCACAACAA AGAGAGTACG AAGACTGCCG GCGGCACTGC 480 GAACAACAGG AGCCACGTCT GCAGTACCAG TGCCAGCGAA GATGCCAAGA GCAGCAGAGG 540

CAACACGGCC GAGGTGGCGA TTTGATGAAC CCTCAGAGGG GAGGCAGCGG CAGATACGAG 600

GAGGGAGAAG AGAAGCAAAG CGACAACCCC TACTACTTCG ACGAACGAAG CTTAAGTACA 660

AGGTTCAGGA CCGAGGAAGG CCACATCTCA GTTCTGGAGA ACTTCTATGG TAGATCCAAG 720

CTTCTACGCG CACTAAAAAA CTATCGCTTG GTGCTCCTCG AGGCTAACCC CAACGCCTTC 780 GTGCTCCCTA CCCACTTGGA TGCAGATGCC ATTCTCTTGG TCATCGGAGG GAGAGGAGCC 840

CTCAAAATGA TCCACCGTGA CAACAGAGAA TCCTACAACC TCGAGTGTGG AGACGTAATC 900

AGAATCCCAG CTGGAACCAC ATTCTACTTA ATCAACCGAG ACAACAACGA GAGGCTCCAC 960

ATAGCCAAGT TCTTACAGAC CATATCCACT CCTGGCCAAT ACAAGGAATT CTTCCCAGCT 1020

GGAGGCCAAA ACCCAGAGCC GTACCTCAGT ACCTTCAGCA AAGAGATTCT CGAGGCTGCG 1080 CTCAACACAC AAACAGAGAG GCTGCGTGGG GTGCTTGGAC AGCAAAGGGA GGGAGTGATA 1140

ATTAGGGCGT CACAGGAGCA GATCAGGGAG TTGACTCGAG ATGACTCAGA GTCACGACGC 1200

TGGCATATAA GGAGAGGTGG TGAATCAAGC AGGGGACCTT ACAATCTGTT CAACAAAAGG 1260

CCACTGTACT CCAACAAATA CGGTCAAGCC TACGAAGTCA AACCTGAGGA CTACAGGCAA 1320

CTCCAAGACA TGGACGTATC AGTTTTCATA GCCAACATCA CCCAGGGATC CATGATGGGT 1380 CCCTTCTTCA ACACTAGGTC TACAAAGGTG GTAGTGGTGG CTAGTGGAGA GGCAGATGTG 1440 GAAATGGCAT GCCCTCACTT GTCGGGAAGA CACGGCGGCC GCGGTGGAGG GAAAAGGCAT 1500

GAGGAGGAAG AGGAGGTGCA CTATGAGCAG GTTAGAGCAC GTTTGTCGAA GAGAGAGGCC 1560

ATTGTTGTTC TGGCAGGTCA TCCCGTCGTC TTCGTTTCAT CCGGAAACGA AAACCTGCTG 1620

CTTTTTGCAT TTGGAATCAA TGCCCAAAAC AACCACGAGA ACTTCCTCGC GGGGAGAGAG 1680

AGGAACGTGC TGCAGCAGAT AGAGCCACAG GCAATGGAGC TAGCGTTTGC CGCTTCAAGG 1740

AAAGAGGTAG AAGAGTTATT TAACAGCCAG GACGAGTCTA TCTTCTTTCC TGGGCCCAGG 1800

CAGCACCAGC AACAGTCGCC CCGCTCCACC AAGCAACAAC AGCCTCTCGT CTCCATTCTG 1860 GACTTCGTTG GCTTCTAAAG TTCTACAAAA AAGAGTGTGT TATGTAGTAT AGGTTAGTAG 1920

CTCCTAGCTC GGTGTATGAG AGTGGTAAGA GACTAAGACG CTAAATCCCT AAGTAACTAA 1980

CCTGGCGAGC TTGCGTGTAT GCAAATAAAG AGGAACAGCT TTCCAACTTT AGAAAGCTCT 2040 _{ττττττττττ} TTTTTTCTTT CTTTTTCTTA AGAAATAAAC GAACGTAGAT TGCGGCTCAA 2100

AAAAAAAAAA AAAAAAAAAA AAAAAAAAAA AAAAAAAAAA 2140

(2) INFORMATION FOR SEQ ID NO : 7:

(i) SEQUENCE CHARACTERISTICS:

(A) LENGTH: 525 amino acids (B) TYPE: amino acid

(C) STRANDEDNESS: single

(D) TOPOLOGY: linear

(ii) MOLECULE TYPE: protein

(vi) ORIGINAL SOURCE:

(A) ORGANISM: Theobroma cacao (F) TISSUE TYPE: Seeds (xi) SEQUENCE DESCRIPTION: SEQ ID NO : 7:

Met Val He Ser Lys Ser Pro Phe He Val Leu He Phe Ser Leu Leu 1 5 10 15 Leu Ser Phe Ala Leu Leu Cys Ser Gly Val Ser Ala Tyr Gly Arg Lys

20 25 30

Gin Tyr Glu Arg Asp Pro Arg Gin Gin Tyr Glu Gin Cys Gin Arg Arg 35 40 45

Cys Glu Ser Glu Ala Thr Glu Glu Arg Glu Gin Glu Gin Cys Glu Gin 50 55 60

Arg Cys Glu Arg Glu Tyr Lys Glu Gin Gin Arg Gin Gin Glu Glu Glu 65 70 75 80 Leu Gin Arg Gin Tyr Gin Gin Cys Gin Gly Arg Cys Gin Glu Gin Gin 85 90 95

Gin Gly Gin Arg Glu Gin Gin Gin Cys Gin Arg Lys Cys Trp Glu Gin 100 105 110

Tyr Lys Glu Gin Glu Arg Gly Glu His Glu Asn Tyr His Asn His Lys 115 120 125 Lys Asn Arg Ser Glu Glu Glu Glu Gly Gin Gin Arg Asn Asn Pro Tyr 130 135 140

Tyr Phe Pro Lys Arg Arg Ser Phe Gin Thr Arg Phe Arg Asp Glu Glu 145 150 155 160

Gly Asn Phe Lys He Leu Gin Arg Phe Ala Glu Asn Ser Pro Pro Leu 165 170 175

Lys Gly He Asn Asp Tyr Arg Leu Ala Met Phe Glu Ala Asn Pro Asn 180 185 190

Thr Phe He Leu Pro His His Cys Asp Ala Glu Ala He Tyr Phe Val 195 200 205 Thr Asn Gly Lys Gly Thr He Thr Phe Val Thr His Glu Asn Lys Glu 210 215 220

Ser Tyr Asn Val Gin Arg Gly Thr Val Val Ser Val Pro Ala Gly Ser 225 230 235 240

Thr Val Tyr Val Val Ser Gin Asp Asn Gin Glu Lys Leu Thr He Ala 245 250 255

Val Leu Ala Leu Pro Val Asn Ser Pro Gly Lys Tyr Glu Leu Phe Phe 260 265 270

Pro Ala Gly Asn Asn Lys Pro Glu Ser Tyr Tyr Gly Ala Phe Ser Tyr 275 280 285 Glu Val Leu Glu Thr Val Phe Asn Thr Gin Arg Glu Lys Leu Glu Glu 290 295 300

He Leu Glu Glu Gin Arg Gly Gin Lys Arg Gin Gin Gly Gin Gin Gly 305 310 315 320

Met Phe Arg Lys Ala Lys Pro Glu Gin He Arg Ala He Ser Gin Gin 325 330 335

Ala Thr Ser Pro Arg His Arg Gly Gly Glu Arg Leu Ala He Asn Leu 340 345 350

Leu Ser Gin Ser Pro Val Tyr Ser Asn Gin Asn Gly Arg Phe Phe Glu 355 360 365 Ala Cys Pro Glu Asp Phe Ser Gin Phe Gin Asn Met Asp Val Ala Val 370 375 380 Ser Ala Phe Lys Leu Asn Gin Gly Ala He Phe Val Pro His Tyr Asn 385 390 395 400

Ser Lys Ala Thr Phe Val Val Phe Val Thr Asp Gly Tyr Gly Tyr Ala 405 410 415

Gin Met Ala Cys Pro His Leu Ser Arg Gin Ser Gin Gly Ser Gin Ser 420 425 430

Gly Arg Gin Asp Arg Arg Glu Gin Glu Glu Glu Ser Glu Glu Glu Thr 435 440 445

Phe Gly Glu Phe Gin Gin Val Lys Ala Pro Leu Ser Pro Gly Asp Val 450 455 460

Phe Val Ala Pro Ala Gly His Ala Val Thr Phe Phe Ala Ser Lys Asp 465 470 475 480 Gin Pro Leu Asn Ala Val Ala Phe Gly Leu Asn Ala Gin Asn Asn Gin

485 490 495

Arg He Phe Leu Ala Gly Arg Pro Phe Phe Leu Asn His Lys Gin Asn 500 505 510

Thr Asn Val He Lys Phe Thr Val Lys Ala Ser Ala Tyr 515 520 525

(2) INFORMATION FOR SEQ ID NO : 8:

(i) SEQUENCE CHARACTERISTICS:

(A) LENGTH: 590 amino acids

(B) TYPE: amino acid (C) STRANDEDNESS: single

(D) TOPOLOGY: linear

(ii) MOLECULE TYPE: protein (vi) ORIGINAL SOURCE:

(A) ORGANISM: Gossypium hirsutum (F) TISSUE TYPE: Seeds

(xi) SEQUENCE DESCRIPTION: SEQ ID NO : 8:

Met Val Arg Asn Lys Ser Ala Cys Val Val Leu Leu Phe Ser Leu Phe 1 5 10 15

Leu Ser Phe Gly Leu Leu Cys Ser Ala Lys Asp Phe Pro Gly Arg Arg 20 25 30

Gly Asp Asp Asp Pro Pro Lys Arg Tyr Glu Asp Cys Arg Arg Arg Cys 35 40 45 Glu Trp Asp Thr Arg Gly Gin Lys Glu Gin Gin Gin Cys Glu Glu Ser 50 55 60 Cys Lys Ser Gin Tyr Gly Glu Lys Asp Gin Gin Gin Arg His Arg Pro 65 70 75 80

Glu Asp Pro Gin Arg Arg Tyr Glu Glu Cys Gin Gin Glu Cys Arg Gin 85 90 95

Gin Glu Glu Arg Gin Gin Pro Gin Cys Gin Gin Arg Cys Leu Lys Arg 100 105 110

Phe Glu Gin Glu Gin Gin Gin Ser Gin Arg Gin Phe Gin Glu Cys Gin 115 120 125

Gin His Cys His Gin Gin Glu Gin Arg Pro Glu Lys Lys Gin Gin Cys 130 135 140

Val Arg Glu Cys Arg Glu Lys Tyr Gin Glu Asn Pro Trp Arg Gly Glu 145 150 155 160 Arg Glu Glu Glu Ala Glu Glu Glu Glu Thr Glu Glu Gly Glu Gin Glu

165 170 175

Gin Ser His Asn Pro Phe His Phe His Arg Arg Ser Phe Gin Ser Arg 180 185 190

Phe Arg Glu Glu His Gly Asn Phe Arg Val Leu Gin Arg Phe Ala Ser 195 200 205

Arg His Pro He Leu Arg Gly He Asn Glu Phe Arg Leu Ser He Leu 210 215 220

Glu Ala Asn Pro Asn Thr Phe Val Leu Pro His His Cys Asp Ala Glu 225 230 235 240 Lys He Tyr Leu Val Thr Asn Gly Arg Gly Thr Leu Thr Phe Leu Thr

245 250 255

His Glu Asn Lys Glu Ser Tyr Asn He Val Pro Gly Val Val Val Lys 260 265 270

Val Pro Ala Gly Ser Thr Val Tyr Leu Ala Asn Gin Asp Asn Lys Glu 275 280 285

Lys Leu He He Ala Val Leu His Arg Pro Val Asn Asn Pro Gly Gin 290 295 300

Phe Glu Glu Phe Phe Pro Ala Gly Ser Gin Arg Pro Gin Ser Tyr Leu 305 310 315 320 Arg Ala Phe Ser Arg Glu He Leu Glu Pro Ala Phe Asn Thr Arg Ser

325 330 335

Glu Gin Leu Asp Glu Leu Phe Gly Gly Arg Gin Ser Arg Arg Arg Gin 340 345 350

Gin Gly Gin Gly Met Phe Arg Lys Ala Ser Gin Glu Gin He Arg Ala 355 ^■ 360 365

Leu Ser Gin Glu Ala Thr Ser Pro Arg Glu Lys Ser Gly Glu Arg Phe 370 375 380

Ala Phe Asn Leu Leu Ser Gin Thr Pro Arg Tyr Ser Asn Gin Asn Gly 385 390 395 400

Arg Phe Phe Glu Ala Cys Pro Pro Glu Phe Arg Gin Leu Arg Asp He 405 410 415

Asn Val Thr Val Ser Ala Leu Gin Leu Asn Gin Gly Ser He Phe Val 420 425 430 Pro His Tyr Asn Ser Lys Ala Thr Phe Val He Leu Val Thr Glu Gly 435 440 445

Asn Gly Tyr Ala Glu Met Val Ser Pro His Leu Pro Arg Gin Ser Ser 450 455 460

Tyr Glu Glu Glu Glu Glu Glu Asp Glu Glu Glu Glu Gin Glu Gin Glu 465 470 475 480

Glu Glu Arg Arg Ser Gly Gin Tyr Arg Lys He Arg Ser Arg Leu Ser 485 490 495

Arg Gly Asp He Phe Val Val Pro Ala Asn Phe Pro Val Thr Phe Val 500 505 510 Ala Ser Gin Asn Gin Asn Leu Arg Met Thr Gly Phe Gly Leu Tyr Asn 515 520 525

Gin Asn He Asn Pro Asp His Asn Gin Arg He Phe Val Ala Gly Lys 530 535 540

He Asn His Val Arg Gin Trp Asp Ser Gin Ala Lys Glu Leu Ala Phe 545 550 555 560

Gly Val Ser Ser Arg Leu Val Asp Glu He Phe Asn Ser Asn Pro Gin 565 570 575

Glu Ser Tyr Phe Val Ser Arg Gin Arg Gin Arg Ala Ser Glu 580 585 590 (2) INFORMATION FOR SEQ ID NO : 9:

(i) SEQUENCE CHARACTERISTICS:

(A) LENGTH: 22 amino acids

(B) TYPE: amino acid (C) STRANDEDNESS: single

(D) TOPOLOGY: linear

(ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO : 9: Arg Gin Arg Asp Pro Gin Gin Gin Ala Glu Gin Ala Gin Lys Arg Ala 1 5 10 15

Gin Arg Arg Glu Thr Glu 20

(2) INFORMATION FOR SEQ ID NO : 10: (i) SEQUENCE CHARACTERISTICS:

(A) LENGTH: 25 amino acids

(B) TYPE: amino acid

(C) STRANDEDNESS: single

(D) TOPOLOGY: linear

(ii) MOLECULE TYPE: protein

(xi) SEQUENCE DESCRIPTION: SEQ ID NO: 10: Pro Arg His Met Gin He Ala Gin Gin Arg Ala Glu Arg Arg Ala Glu 1 5 10 15

Lys Glu Lys Arg Lys Gin Gin Lys Arg 20 25

(2) INFORMATION FOR SEQ ID NO : 11:

(i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 30 amino acids

(B) TYPE: amino acid

(C) STRANDEDNESS: single

(D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein

(xi) SEQUENCE DESCRIPTION: SEQ ID NO: 11:

Met Ala Trp Phe His Val Ser Val Cys Asn Ala Val Phe Val Val He 1 5 10 15

He He He Met Leu Leu Met Phe Val Pro Val Val Arg Gly 20 25 30

(2) INFORMATION FOR SEQ ID NO: 12

(i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 20 base pairs (B) TYPE: nucleotide

(C) STRANDEDNESS: single

(D) TOPOLOGY: linear

(ii) MOLECULE TYPE: nucleotide

(xi) SEQUENCE DESCRIPTION: SEQ ID NO: 12: CAGCAGCAGT ATGAGCAGTG 20

(2) INFORMATION FOR SEQ ID NO: 13:

( ) SEQUENCE CHARACTERISTICS:

(A) LENGTH: 21 base pairs

(B) TYPE: nucleic acid (C) STRANDEDNESS: single

(D) TOPOLOGY: linear

(n) MOLECULE TYPE: DNA (xi) SEQUENCE DESCRIPTION: SEQ ID NO: 13:

TTTTTCGTAK CKKC TTCGC A 2₁

(2) INFORMATION FOR SEQ ID NO: 14:

(I) SEQUENCE CHARACTERISTICS:

(A) LENGTH: 24 base pairs

(B) TYPE: nucleic acid (C) STRANDEDNESS: single

(D) TOPOLOGY: linear

(II) MOLECULE TYPE: DNA (x ) SEQUENCE DESCRIPTION: SEQ ID NO: 14:

ACACCATATG CGACAACGTG ATCC 24

(2) INFORMATION FOR SEQ ID NO: 15:

( ) SEQUENCE CHARACTERISTICS:

(A) LENGTH: 26 base pairs

(B) TYPE: nucleic acid (C) STRANDEDNESS: single

(D) TOPOLOGY: linear

(n) MOLECULE TYPE: DNA (x ) SEQUENCE DESCRIPTION: SEQ ID NO: 15:

CGTTGTTTTC TCTATTCCTA GGGTTG 26

(2) INFORMATION FOR SEQ ID NO: 16:

( ) SEQUENCE CHARACTERISTICS:

(A) LENGTH: 22 ammo acids

(C) STRANDEDNESS: single

(D) TOPOLOGY: linear (11) MOLECULE TYPE: protein

(xi) SEQUENCE DESCRIPTION: SEQ ID NO: 16:

Met Gly His His His H s His His His His His His Ser Ser Gly His 1 5 10 15

He Glu Gly Arg His Met 20

(2) INFORMATION FOR SEQ ID NO : 17: ( ) SEQUENCE CHARACTERISTICS:

(A) LENGTH: 90 base pairs

(B) TYPE: nucleic acid

(C) STRANDEDNESS: single

(D) TOPOLOGY: linear

(i ) MOLECULE TYPE: DNA

(xi) SEQUENCE DESCRIPTION: SEQ ID NO: 17 GGGAATTCCA TATGTATGAG CGTGATCCTC GACAGCAATA CGAGCAATGC CAGAGGCGAT 60 GCGAGTCGGA AGCGACTGAA GAAAGGGAGC 90

(2) INFORMATION FOR SEQ ID NO: 18

(l) SEQUENCE CHARACTERISTICS:

(A) LENGTH: 91 base pairs

(B) TYPE: nucleic acid (C) STRANDEDNESS: single

(D) TOPOLOGY: linear

(ii) MOLECULE TYPE: DNA (x ) SEQUENCE DESCRIPTION: SEQ ID NO: 18:

GAAGCGACTG AAGAAAGGGA GCAAGAGCAG TGTGAACAAC GCTGTGAAAG GGAGTACAAG 60

GAGCAGCAGA GACAGCAATA GGGATCCACA C 91

(2) INFORMATION FOR SEQ ID NO : 19

(l) SEQUENCE CHARACTERISTICS: (A) LENGTH: 101 base pairs

(B) TYPE, nucleic acid

(C) STRANDEDNESS: single

(D) TOPOLOGY: linear (ii) MOLECULE TYPE: DNA (xi) SEQUENCE DESCRIPTION: SEQ ID NO: 19:

GGGAATTCCA TATGCTTCAA AGGCAATACC AGCAATGTCA AGGGCGTTGT CAAGAGCAAC 60 AACAGGGGCA GAGAGAGCAG CAGCAGTGCC AGAGAAAATG C 101

(2) INFORMATION FOR SEQ ID NO : 20 (i) SEQUENCE CHARACTERISTICS:

(A) LENGTH: 102 base pairs

(B) TYPE: nucleic acid

(C) STRANDEDNESS: single

(D) TOPOLOGY: linear

(ii) MOLECULE TYPE: DNA

(xi) SEQUENCE DESCRIPTION: SEQ ID NO : 20 GTGTGGATCC CTAGCTCCTA TTTTTTTTGT GATTATGGTA ATTCTCGTGC TCGCCTCTCT 60 CTTGTTCCTT ATATTGCTCC CAGCATTTTC TCTGGCACTG CT 102

(2) INFORMATION FOR SEQ ID NO : 21:

(i) SEQUENCE CHARACTERISTICS:

(A) LENGTH: 42 amino acids (B) TYPE: amino acid

(C) STRANDEDNESS: single

(D) TOPOLOGY: linear

(ii) MOLECULE TYPE: protein

(vi) ORIGINAL SOURCE:

(A) ORGANISM: Peanut (F) TISSUE TYPE: Seeds (xi) SEQUENCE DESCRIPTION: SEQ ID NO: 21:

Met Arg Gly Arg Val Ser Pro Leu Met Leu Leu Leu Gly He Leu Val 1 5 10 15 Leu Ala Ser Val Ser Ala Thr Gin Ala Lys Ser Pro Tyr Arg Lys Thr 20 25 30

Glu Asn Pro Cys Ala Gin Arg Cys Leu Gin Ser Cys Gin Gin Glu Pro 35 40 45

Asp Asp Leu Lys Gin Lys Ala Cys Glu Ser Arg Cys Thr Lys Leu Glu 50 55 60

Tyr Asp Pro Arg Cys Val Tyr Asp Thr Gly Ala Thr Asn Gin Arg His 65 70 75 80 Pro Pro Gly Glu Arg Thr Arg Gly Arg Gin Pro Gly Asp Tyr Asp Asp 85 90 95

Asp Arg Arg Gin Pro Arg Arg Glu Glu Gly Gly Arg Trp Gly Pro Ala 100 105 110

Glu Pro Arg Glu Arg Glu Arg Glu Glu Asp Trp Arg Gin Pro Arg Glu 115 120 125 Asp Trp Arg Arg Pro Ser His Gin Gin Pro Arg Lys He Arg Pro Glu 130 135 140

Gly Arg Glu Gly Glu Gin Glu Trp Gly Thr Pro Gly Ser Glu Val Arg 145 150 155 160

Glu Glu Thr Ser Arg Asn Asn Pro Phe Tyr Phe Pro Ser Arg Arg Phe 165 170 175 180

Ser Thr Arg Tyr Gly Asn Gin Asn Gly Arg He Arg Val Leu Gin Arg 185 190 195

Phe Asp Gin Arg Ser Lys Gin Phe Gin Asn Leu Gin Asn His Arg He 200 205 210 Val Gin He Glu Ala Arg Pro Asn Thr Leu Val Leu Pro Lys His Ala 215 220 225

Asp Ala Asp Asn He Leu Val He Gin Gin Gly Gin Ala Thr Val Thr 230 235 240 245

Val Ala Asn Gly Asn Asn Arg Lys Ser Phe Asn Leu Asp Glu Gly His 250 255 260

Ala Leu Arg He Pro Ser Gly Phe He Ser Tyr He Leu Asn Arg His 265 270 275

Asp Asn Gin Asn Leu Arg Val Ala Lys He Ser Met Pro Val Asn Thr 280 285 290 Pro Gly Gin Phe Glu Asp Phe Phe Pro Ala Ser Ser Arg Asp Gin Ser 295 300 305

Ser Tyr Leu Gin Gly Phe Ser Arg Asn Thr Leu Glu Ala Ala Phe Asn 310 315 320 325

Ala Glu Phe Asn Glu He Arg Arg Val Leu Leu Glu Glu Asn Ala Gly 330 335 340

Gly Glu Gin Glu Glu Arg Gly Gin Arg Arg Arg Ser Thr Arg Ser Ser 345 350 355

Asp Asn Glu Gly Val He Val Lys Val Ser Lys Glu His Val Gin Glu 360 365 370 Leu Thr Lys His Ala Lys Ser Val Ser Lys Lys Gly Ser Glu Glu Glu 375 380 385 Asp He Thr Asn Pro He Asn Leu Arg Asp Gly Glu Pro Asp Leu Ser 390 395 400 405 Asn Asn Phe Gly Arg Leu Phe Glu Val Lys Pro Asp Lys Lys Asn Pro

410 415 420

Gin Leu Gin Asp Leu Asp Met Met Leu Thr Cys Val Glu He Lys Glu 425 430 435

Gly Ala Leu Met Leu Pro His Phe Asn Ser Lys Ala Met Val He Val 440 445 450

Val Val Asn Lys Gly Thr Gly Asn Leu Glu Leu Val Ala Val Arg Lys 455 460 470

Glu Gin Gin Gin Arg Gly Arg Arg Glu Gin Glu Trp Glu Glu Glu Glu 480 485 490 500 Glu Asp Glu Glu Glu Glu Gly Ser Asn Arg Glu Val Arg Arg Tyr Thr

505 510 515

Ala Arg Leu Lys Glu Gly Asp Val Phe He Met Pro Ala Ala His Pro 520 525 530

Val Ala He Asn Ala Ser Ser Glu Leu His Leu Leu Gly Phe Gly He 535 540 545

Asn Ala Glu Asn Asn His Arg He Phe Leu Ala Gly Asp Lys Asp Asn 550 555 560

Val He Asp Gin He Glu Lys Gin Ala Lys Asp Leu Ala Phe Pro Gly 565 570 575 580 Ser Gly Glu Gin Val Glu Lys Leu He Lys Asn Gin Arg Glu Ser His

585 590 595

Phe Val Ser Ala Arg Pro Gin Ser Gin Ser Pro Ser Ser Pro Glu Lys 600 605 610

Glu Asp Gin Glu Glu Glu Asn Gin Gly Gly Lys Gly Pro Leu Leu Ser 615 620 625

He Leu Lys Ala Phe Asn 630

(2) INFORMATION FOR SEQ ID NO: 22: (i) SEQUENCE CHARACTERISTICS:

(A) LENGTH: 46 amino acids

(B) TYPE: amino acid

(C) STRANDEDNESS: single

(D) TOPOLOGY: linear

(ii) MOLECULE TYPE: protein (vi) ORIGINAL SOURCE:

(A) ORGANISM: Maize

(F) TISSUE TYPE: Seeds

(xi) SEQUENCE DESCRIPTION: SEQ ID NO: 22:

Met Val Ser Ala Arg He Val Val Leu Leu Ala Thr Leu Leu Cys Ala 1 5 10 15

Ala Ala Ala Val Ala Ser Ser Trp Glu Asp Asp Asn His His His His 20 25 30

Gly Gly His Lys Ser Gly Gin Cys Val Arg Arg Cys Glu Asp Arg Pro 35 40 45

Trp His Gin Arg Pro Arg Cys Leu Glu Gin Cys Arg Glu Glu Glu Arg 50 55 60 Glu Lys Arg Gin Glu Arg Ser Arg His Glu Ala Asp Asp Arg Ser Gly 65 70 75 80

Glu Gly Ser Ser Glu Asp Glu Arg Glu Gin Glu Lys Glu Lys Gin Lys 85 90 95

Asp Arg Arg Pro Tyr Val Phe Asp Arg Arg Ser Phe Arg Arg Val Val 100 105 110

Arg Ser Glu Gin Gly Ser Leu Arg Val Leu Arg Pro Phe Asp Glu Val 115 120 125

Ser Arg Leu Leu Arg Gly He Arg Asp Tyr Arg Val Ala Val Leu Glu 130 135 140 Ala Asn Pro Arg Ser Phe Val Val Pro Ser His Thr Asp Ala His Cys 145 150 155 160

He Cys Tyr Val Ala Glu Gly Glu Gly Val Val Thr Thr He Glu Asn 165 170 175 180

Gly Glu Arg Arg Ser Tyr Thr He Lys Gin Gly His Val Phe Val Ala 185 190 195

Pro Ala Gly Ala Val Thr Tyr Leu Ala Asn Thr Asp Gly Arg Lys Lys 200 205 210

Leu Val He Thr Lys He Leu His Thr He Ser Val Pro Gly Glu Phe 215 220 225 Gin Phe Phe Phe Gly Pro Gly Gly Arg Asn Pro Glu Ser Phe Leu Ser 230 235 240 245

Ser Phe Ser Lys Ser He Gin Arg Ala Ala Tyr Lys Thr Ser Ser Asp 250 255 260

Arg Leu Glu Arg Leu Phe Gly Arg His Gly Gin Asp Lys Gly He He 265 270 275

Val Arg Ala Thr Glu Glu Gin Thr Arg Glu Leu Arg Arg His Ala Ser 280 285 290

Glu Gly Gly His Gly Pro His Trp Pro Leu Pro Pro Phe Gly Glu Ser 295 300 305

Arg Gly Pro Tyr Ser Leu Leu Asp Gin Arg Pro Ser He Ala Asn Gin 310 315 320 325

His Gly Gin Leu Tyr Glu Ala Asp Ala Arg Ser Phe His Asp Leu Ala 330 335 340 Glu His Asp Val Ser Val Ser Phe Ala Asn He Thr Ala Gly Ser Met 345 350 355

Ser Ala Pro Leu Phe Asn Thr Arg Ser Phe Lys He Ala Tyr Val Pro 360 365 370

Asn Gly Lys Gly Tyr Ala Glu He Val Cys Pro His Arg Gin Ser Gin 375 380 385

Gly Gly Glu Ser Glu Arg Glu Arg Asp Lys Gly Arg Arg Ser Glu Glu 390 395 400 405

Glu Glu Glu Glu Ser Ser Glu Glu Gin Glu Glu Ala Gly Gin Gly Tyr 410 415 420 His Thr He Arg Ala Arg Leu Ser Pro Gly Thr Ala Phe Val Val Pro 425 430 435

Ala Gly His Pro Phe Val Ala Val Ala Ser Arg Asp Ser Asn Leu Gin 440 445 450

He Val Cys Phe Glu Val His Ala Asp Arg Asn Glu Lys Val Phe Leu 455 460 470

Ala Gly Ala Asp Asn Val Leu Gin Lys Leu Asp Arg Val Ala Lys Ala 480 485 490 500

Leu Ser Phe Ala Ser Lys Ala Glu Glu Val Asp Glu Val Leu Gly Ser 505 510 515 Arg Arg Glu Lys Gly Phe Leu Pro Gly Pro Glu Glu Ser Gly Gly His 520 525 530

Glu Glu Arg Glu Gin Glu Glu Glu Glu Arg Glu Glu Arg His Gly Gly 535 540 545

Arg Gly Glu Arg Glu Arg His Gly Arg Glu Glu Arg Glu Lys Glu Glu 550 555 560

Glu Arg Glu Gly Arg His Gly Gly Arg Glu Glu Arg Glu Glu Glu Glu 565 570 575 580 Arg His Gly Arg Gly Arg Arg Glu Glu Val Ala Glu Thr Leu Met Arg 585 590 595

Met Val Thr Ala Arg Met 600

(2) INFORMATION FOR SEQ ID NO: 23: (i) SEQUENCE CHARACTERISTICS:

(A) LENGTH: 33 amino acids

(B) TYPE: amino acid

(C) STRANDEDNESS: single

(D) TOPOLOGY: linear

(ii) MOLECULE TYPE: protein

(vi) ORIGINAL SOURCE:

(A) ORGANISM: Maize (F) TISSUE TYPE: Seeds

(xi) SEQUENCE DESCRIPTION: SEQ ID NO: 23:

Arg Ser Gly Arg Gly Glu Cys Arg Arg Gin Cys Leu Arg Arg His Glu 1 5 10 15

Gly Gin Pro Trp Glu Thr Gin Glu Cys Met Arg Arg Cys Arg Arg Arg 20 25 30 Gly

(2) INFORMATION FOR SEQ ID NO: 24: (i) SEQUENCE CHARACTERISTICS:

(A) LENGTH: 42 amino acids

(B) TYPE: amino acid

(C) STRANDEDNESS: single

(D) TOPOLOGY: linear

(ii) MOLECULE TYPE: protein

(vi) ORIGINAL SOURCE:

(A) ORGANISM: Barley (F) TISSUE TYPE: Seeds

(xi) SEQUENCE DESCRIPTION: SEQ ID NO: 24:

Met Ala Thr Arg Ala Lys Ala Thr He Pro Leu Leu Phe Leu Leu Gly 1 5 10 15

Thr Ser Leu Leu Phe Ala Ala Ala Val Ser Ala Ser His Asp Asp Glu 20 25 30 Asp Asp Arg Arg Gly Gly His Ser Leu Gin Gin Cys Val Gin Arg Cys 35 40 45 Arg Gin Glu Arg Pro Arg Tyr Ser His Ala Arg Cys Val Gin Glu Cys 50 55 60 Arg Asp Asp Gin Gin Gin His Gly Arg His Glu Gin Glu Glu Glu Gin 65 70 75 80

Gly Arg Gly Arg Gly Trp His Gly Glu Gly Glu Arg Glu Glu Glu His 85 90 95

Gly Arg Gly Arg Gly Arg His Gly Glu Gly Glu Arg Glu Glu Glu His 100 105 110

Gly Arg Gly Arg Gly Arg His Gly Glu Gly Glu Arg Glu Glu Glu Arg 115 120 125

Gly Arg Gly His Gly Arg His Gly Glu Gly Glu Arg Glu Glu Glu Arg 130 135 140 Gly Arg Gly Arg Gly Arg His Gly Glu Gly Glu Arg Glu Glu Glu Glu 145 150 155 160

Gly Arg Gly Arg Gly Arg Arg Gly Glu Gly Glu Arg Asp Glu Glu Gin 165 170 175 180

Gly Asp Ser Arg Arg Pro Tyr Val Phe Gly Pro Arg Ser Phe Arg Arg 185 190 195

He He Gin Ser Asp His Gly Phe Val Arg Ala Leu Arg Pro Phe Asp 200 205 210

Gin Val Ser Arg Leu Leu Arg Gly He Arg Asp Tyr Arg Val Ala He 215 220 225 Met Glu Val Asn Pro Arg Ala Phe Val Val Pro Gly Phe Thr Asp Ala 230 235 240 245

Asp Gly Val Gly Tyr Val Ala Gin Gly Glu Gly Val Leu Thr Val He 250 255 260

Glu Asn Gly Glu Lys Arg Ser Tyr Thr Val Lys Glu Gly Asp Val He 265 270 275

Val Ala Pro Ala Gly Ser He Met His Leu Ala Asn Thr Asp Gly Arg 280 285 290

Arg Lys Leu Val He Ala Lys He Leu His Thr He Ser Val Pro Gly 295 300 305 Lys Phe Gin Phe Leu Ser Val Lys Pro Leu Leu Ala Ser Leu Ser Lys 310 315 320 325

Arg Val Leu Arg Ala Ala Phe Lys Thr Ser Asp Glu Arg Leu Glu Arg 330 335 340

Leu Phe Asn Gin Arg Gin Gly Gin Glu Lys Thr Arg Ser Val Ser He 345 350 355

Val Arg Ala Ser Glu Glu Gin Leu Arg Glu Leu Arg Arg Glu Ala Ala 360 365 370

Glu Gly Gly Gin Gly His Arg Trp Pro Leu Pro Pro Phe Arg Gly Asp 375 380 385

Ser Arg Asp Thr Phe Asn Leu Leu Glu Gin Arg Pro Lys He Ala Asn 390 395 400 405

Arg His Gly Arg Leu Tyr Glu Ala Asp Ala Arg Ser Phe His Ala Leu 410 415 420 Ala Asn Gin Asp Val Arg Val Ala Val Ala Asn He Thr Pro Gly Ser 425 430 435

Met Thr Ala Pro Tyr Leu Asn Thr Gin Ser Phe Lys Leu Ala Val Val 440 445 450

Leu Glu Gly Glu Gly Glu Val Gin He Val Cys Pro His Leu Gly Arg 455 460 470

Glu Ser Glu Ser Glu Arg Glu His Gly Lys Gly Arg Arg Arg Glu Glu 480 485 490 500

Glu Glu Asp Asp Gin Arg Gin Gin Arg Arg Arg Gly Ser Glu Ser Glu 505 510 515 Ser Glu Glu Glu Glu Glu Gin Gin Arg Tyr Glu Thr Val Arg Ala Arg 520 525 530

Val Ser Arg Gly Ser Ala Phe Val Val Pro Pro Gly His Pro Val Val 535 540 545

Glu He Ser Ser Ser Gin Gly Ser Ser Asn Leu Gin Val Val Cys Phe 550 555 560

Glu He Asn Ala Glu Arg Asn Glu Arg Val Trp Leu Ala Gly Arg Asn 565 570 575 580

Asn Val He Gly Lys Leu Gly Ser Pro Ala Gin Glu Leu Thr Phe Gly 585 590 595 Arg Pro Ala Arg Glu Val Gin Glu Val Phe Arg Ala Gin Asp Gin Asp 600 605 610

Glu Gly Phe Val Ala Gly Pro Glu Gin Gin Ser Arg Glu Gin Glu Gin 615 620 625

Glu Gin Glu Arg His Arg Arg Arg Gly Asp Arg Gly Arg Gly Asp Glu 630 635 640

Ala Val Glu Thr Phe Leu Arg Met Ala Thr Gly Ala He 645 650 655 (2) INFORMATION FOR SEQ ID NO : 25:

(i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 55 amino acids

(B) TYPE: amino acid

(C) STRANDEDNESS: single

(D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein

(vi) ORIGINAL SOURCE:

(A) ORGANISM: Soybean (Glycine max) (F) TISSUE TYPE: Seeds

(xi) SEQUENCE DESCRIPTION: SEQ ID NO: 25:

Met Met Arg Ala Arg Phe Pro Leu Leu Leu Leu Gly Leu Val Phe Leu 1 5 10 15

Ala Ser Val Ser Val Ser Phe Gly He Ala Tyr Trp Glu Lys Glu Asn 20 25 30

Pro Lys His Asn Lys Cys Leu Gin Ser Cys Asn Ser Glu Arg Asp Ser 35 40 45

Tyr Arg Asn Gin Ala Cys His Ala Arg Cys Asn Leu Leu Lys Val Glu 50 55 60 Lys Glu Glu Cys Glu Glu Gly Glu He Pro Arg Pro Arg Pro Arg Pro 65 70 75 80

Gin His Pro Glu Arg Glu Pro Gin Gin Pro Gly Glu Lys Glu Glu Asp 85 90 95

Glu Asp Glu Gin Pro Arg Pro He Pro Phe Pro Arg Pro Gin Pro Arg 100 105 110

Gin Glu Glu Glu His Glu Gin Arg Glu Glu Gin Glu Trp Pro Arg Lys 115 120 125

Glu Glu Lys Arg Gly Glu Lys Gly Ser Glu Glu Glu Asp Glu Asp Glu 130 135 140 Asp Glu Glu Gin Asp Glu Arg Gin Phe Pro Phe Pro Arg Pro Pro His 145 150 155 160

Gin Lys Glu Glu Arg Asn Glu Glu Glu Asp Glu Asp Glu Glu Gin Gin 165 170 175 180

Arg Glu Ser Glu Glu Ser Glu Asp Ser Glu Leu Arg Arg His Lys Asn 185 190 195

Lys Asn Pro Phe Leu Phe Gly Ser Asn Arg Phe Glu Thr Leu Phe Lys 200 205 210 Asn Gin Tyr Gly Arg He Arg Val Leu Gin Arg Phe Asn Gin Arg Ser 215 220 225

Pro Gin Leu Gin Asn Leu Arg Asp Tyr Arg He Leu Glu Phe Asn Ser 230 235 240 245

Lys Pro Asn Thr Leu Leu Leu Pro Asn His Ala Asp Ala Asp Tyr Leu 250 255 260 He Val He Leu Asn Gly Thr Ala He Leu Ser Leu Val Asn Asn Asp 265 270 275

Asp Arg Asp Ser Tyr Arg Leu Gin Ser Gly Asp Ala Leu Arg Val Pro 280 285 290

Ser Gly Thr Thr Tyr Tyr Val Val Asn Pro Asp Asn Asn Glu Asn Leu 295 300 305

Arg Leu He Thr Leu Ala He Pro Val Asn Lys Pro Gly Arg Phe Glu 310 315 320 325

Ser Phe Phe Leu Ser Ser Thr Glu Ala Gin Gin Ser Tyr Leu Gin Gly 330 335 340 Phe Ser Arg Asn He Leu Glu Ala Ser Tyr Asp Thr Lys Phe Glu Glu 345 350 355

He Asn Lys Val Leu Phe Ser Arg Glu Glu Gly Gin Gin Gin Gly Glu 360 365 370

Gin Arg Leu Gin Glu Ser Val He Val Glu He Ser Lys Glu Gin He 375 380 385

Arg Ala Leu Ser Lys Arg Ala Lys Ser Ser Ser Arg Lys Thr He Ser 390 395 400 405

Ser Glu Asp Lys Pro Phe Asn Leu Arg Ser Arg Asp Pro He Tyr Ser 410 415 420 Asn Lys Leu Gly Lys Phe Phe Glu He Thr Pro Glu Lys Asn Pro Gin 425 430 435

Leu Arg Asp Leu Asp He Phe Leu Ser He Val Asp Met Asn Glu . Gly 440 445 450

Ala Leu Leu Leu Pro His Phe Asn Ser Lys Ala He Val He Leu Val 455 460 470

He Asn Glu Gly Asp Ala Asn He Glu Leu Val Gly Leu Lys Glu Gin 480 485 490 500

Gin Gin Glu Gin Gin Gin Glu Glu Gin Pro Leu Glu Val Arg Lys Tyr 505 510 515 Arg Ala Glu Leu Ser Glu Gin Asp He Phe Val He Pro Ala Gly Tyr 520 525 530 Pro Val Val Val Asn Ala Thr Ser Asn Leu Asn Phe Phe Ala He Gly 535 540 545

He Asn Ala Glu Asn Asn Gin Arg Asn Phe Leu Ala Gly Ser Gin Asp 550 555 560

Asn Val He Ser Gin He Pro Ser Gin Val Gin Glu Leu Ala Phe Pro 565 570 575 580

Gly Ser Ala Gin Ala Val Glu Lys Leu Leu Lys Asn Gin Arg Glu Ser 585 590 595

Tyr Phe Val Asp Ala Gin Pro Lys Lys Lys Glu Glu Gly Asn Lys Gly 600 605 610

Arg Lys Gly Pro Leu Ser Ser He Leu Arg Ala Phe Tyr 615 620 625

(2) INFORMATION FOR SEQ ID NO : 26:

(i) SEQUENCE CHARACTERISTICS:

(A) LENGTH: 23 amino acids (B) TYPE: amino acid

(C) STRANDEDNESS: single

(D) TOPOLOGY: linear

(ii) MOLECULE TYPE: protein

(vi) ORIGINAL SOURCE:

(A) ORGANISM: Stenocarpus sinuatus (F) TISSUE TYPE: Seeds (xi) SEQUENCE DESCRIPTION: SEQ ID NO: 26:

Val Lys Glu Asp His Gin Phe Glu Thr Arg Gly Glu He Leu Glu Cys 1 5 10 15 Tyr Arg Leu Cys Gin Gin Gin

20

(28) INFORMATION FOR SEQ ID NO : 27:

(i) SEQUENCE CHARACTERISTICS:

(A) LENGTH: 17 amino acids

(B) TYPE: amino acid

(C) STRANDEDNESS: single (D) TOPOLOGY: linear

(ii) MOLECULE TYPE: protein

(vi) ORIGINAL SOURCE: (A) ORGANISM: Stenocarpus sinuatus

(F) TISSUE TYPE: Seeds (xi ) SEQUENCE DESCRIPTION : SEQ ID NO : 27 :

Gin Lys His Arg Ser Gin He Leu Gly Cys Tyr Leu Xxx cys Gin Gin 1 5 10 15

Leu

(2) INFORMATION FOR SEQ ID NO : 28:

(l) SEQUENCE CHARACTERISTICS:

(A) LENGTH: 28 amino acids

(B) TYPE: amino acid (C) STRANDEDNESS: single

(D) TOPOLOGY: linear

(ii) MOLECULE TYPE: protein (vi) ORIGINAL SOURCE:

(A) ORGANISM: Stenocarpus sinuatus (F) TISSUE TYPE: Seeds

(xi ) SEQUENCE DESCRIPTION : SEQ ID NO : 28 :

Leu Asp Pro He Arg Gin Gin Gin Leu Cys Gin Met Arg Cys Gin Gin 1 5 10 15

Gin Glu Lys Asp Pro Arg Gin Gin Gin Gin Cys Lys 20 25

Claims

CLAIMS 1. A protein fragment having antimicrobial activity, wherein said protein fragment is selected from:

(ii) a polypeptide having an amino acid sequence selected from: residues 29 to 73 of SEQ ID NO: 1 residues 74 to 116 of SEQ ID NO: 1 residues 1 17 to 185 of SEQ ID NO: 1 residues 186 to 248 of SEQ ID NO: 1 residues 29 to 73 of SEQ ID NO: 3 residues 74 to 116 of SEQ ID NO: 3 residues 1 17 to 185 of SEQ ID NO: 3 residues 186 to 248 of SEQ ID NO: 3 residues 1 to 32 of SEQ ID NO: 5 residues 33 to 75 of SEQ ID NO: 5 residues 76 to 144 of SEQ ID NO: 5 residues 145 to 210 of SEQ ID NO: 5 residues 34 to 80 of SEQ ID NO: 7 residues 81 to 140 of SEQ ID NO: 7 residues 33 to 79 of SEQ ID NO: 8 residues 80 to 119 of SEQ ID NO: 8 residues 120 to 161 of SEQ ID NO: 8 residues 32 to 91 of SEQ ID NO: 21 residues 25 to 84 of SEQ ID NO: 22 residues 29 to 94 of SEQ ID NO: 24 residues 31 to 85 of SEQ ID NO: 25 residues 1 to 23 of SEQ ID NO: 26 residues 1 to 17 of SEQ ID NO: 27 residues 1 to 28 of SEQ ID NO: 28; (ii) a homologue of (i); (iii) a polypeptide containing a relative cysteine spacing of C-2X-C-3X-C-(10-12)X-C-3X-

C-3X-C wherein X is any amino acid residue, and C is cysteine; (iv) a polypeptide containing a relative cysteine and tyrosine/phenylalanine spacing of Z- 2X-C-3X-C-(10-12)X-C-3X-C-3X-Z wherein X is any amino acid residue, and C is cysteine, and Z is tyrosine or phenylalanine; (v) a polypeptide containing a relative cysteine spacing of C-3X-C-(10-12)X-C-3X-C wherein X is any amino acid residue, and C is cysteine; (vi) a polypeptide with substantially the same spacing of positively charged residues relative to the spacing of cysteine residues as (i); and (vii) a fragment of the polypeptide of any one of (i) to (vi) which has substantially the same antimicrobial activity as (i).

2. A protein containing at least one polypeptide fragment according to claim 1 , wherein said polypeptide fragment has a sequence selected from within a sequence comprising SEQ ID NO: 1, SEQ ID NO: 3 or SEQ ID NO: 5

3. A protein having a sequence selected from SEQ ID NO: 1 , SEQ ID NO: 3 or SEQ ID

NO: 5.

4. An isolated or synthetic DNA encoding a polypeptide fragment according to claim 1.

5. The DNA according to claim 4, wherein said DNA has a sequence selected from SEQ ID NO: 2, SEQ ID NO: 4 or SEQ ID NO: 6.

6. A DNA constmct which includes a DNA according to claim 4 operatively linked to elements for the expression of said encoded protein.

7. A transgenic plant harbouring a DNA constmct according to claim 6.

8. The transgenic plant according to claim 7, wherein said plant is a monocotyledonous plant or a dicotyledonous plant.

9. The transgenic plant according to claim 7, wherein said plant is selected from maize, banana, peanut, field peas, sunflower, tomato, canola, tobacco, wheat, barley, oats, potato, soybeans, cotton, carnations, roses, or sorghum.

10. Reproductive material of a transgenic plant according to claim 7.

1 1. A composition comprising an antimicrobial protein according to claim 1 together with an agriculturally-acceptable carrier diluent or excipient.

12. A composition comprising an antimicrobial protein according to claim 1 together with an pharmaceutically-acceptable carrier diluent or excipient.

13. A method of controlling microbial infestation of a plant, the method comprising: i) treating said plant with an antimicrobial protein according to claim 1 or a composition according to claim 11 ; or ii) introducing a DNA constmct according to claim 6 into said plant.

14. A method of controlling microbial infestation of a mammalian animal, the method comprising treating the animal with an antimicrobial protein according to claim 1 or a composition according to claim 12.

15. The method of claim 14, wherein said mammalian animal is a human.

16. A method of preparing an antimicrobial protein, which method comprises the steps of: a) obtaining or designing an amino acid sequence which forms a helix-turn-helix stmcture; b) replacing individual residues to achieve substantially the same distribution of positively charged residues and cysteine residues as in one or more of the amino acid sequences shown in Figure 4; c) synthesising a protein comprising said amino acid sequence chemically or by recombinant DNA techniques in liquid culture; and d) if necessary, forming disulphide linkages between said cysteine residues.