US20030092097A1 - Cellulase variants - Google Patents
Cellulase variants Download PDFInfo
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- US20030092097A1 US20030092097A1 US09/261,329 US26132999A US2003092097A1 US 20030092097 A1 US20030092097 A1 US 20030092097A1 US 26132999 A US26132999 A US 26132999A US 2003092097 A1 US2003092097 A1 US 2003092097A1
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- cellulase
- variant
- amino acid
- humicola insolens
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- 0 [1*]=N(C)C([2*])=O Chemical compound [1*]=N(C)C([2*])=O 0.000 description 2
- WSFSSNUMVMOOMR-UHFFFAOYSA-N C=O Chemical compound C=O WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N O Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/16—Organic compounds
- C11D3/38—Products with no well-defined composition, e.g. natural products
- C11D3/386—Preparations containing enzymes, e.g. protease or amylase
- C11D3/38645—Preparations containing enzymes, e.g. protease or amylase containing cellulase
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N9/00—Enzymes; Proenzymes; Compositions thereof; Processes for preparing, activating, inhibiting, separating or purifying enzymes
- C12N9/14—Hydrolases (3)
- C12N9/24—Hydrolases (3) acting on glycosyl compounds (3.2)
- C12N9/2402—Hydrolases (3) acting on glycosyl compounds (3.2) hydrolysing O- and S- glycosyl compounds (3.2.1)
- C12N9/2405—Glucanases
- C12N9/2434—Glucanases acting on beta-1,4-glucosidic bonds
- C12N9/2437—Cellulases (3.2.1.4; 3.2.1.74; 3.2.1.91; 3.2.1.150)
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Y—ENZYMES
- C12Y302/00—Hydrolases acting on glycosyl compounds, i.e. glycosylases (3.2)
- C12Y302/01—Glycosidases, i.e. enzymes hydrolysing O- and S-glycosyl compounds (3.2.1)
- C12Y302/01004—Cellulase (3.2.1.4), i.e. endo-1,4-beta-glucanase
Definitions
- the present invention relates to cellulase variants, i.e. endo- ⁇ -1,4-glucanase variants, derived from a parental cellulase, i.e. endo- ⁇ -1,4-glucanase, by substitution, insertion and/or deletion, which variant has a catalytic core domain, in which the variant at position 5 holds an alanine residue (A), a serine residue (S), or a threonine residue (T); at position 8 holds a phenylalanine residue (F), or a tyrosine residue (Y); at position 9 holds a phenylalanine residue (F), a tryptophan residue (W), or a tyrosine residue (Y); at position 10 holds an aspartic acid residue (D); and at position 121 holds an aspartic acid residue (D).
- A alanine residue
- S serine residue
- T threonine residue
- T a threonine residue
- Cellulases or cellulolytic enzymes are enzymes involved in hydrolyses of cellulose.
- cellobiohydrolase (1,4- ⁇ -D-glucan cellobiohydrolase, EC 3.2.1.91)
- endo- ⁇ -1,4-glucanase endo-1,4- ⁇ -D-glucan 4-glucanohydrolase
- ⁇ -glucosidase EC 3.2.1.21
- endo- ⁇ -1,4-glucanases (EC No. 3.2.1.4) constitute an interesting group of hydrolases for the mentioned industrial uses.
- Endoglucanases catalyses endo hydrolysis of 1,4- ⁇ -D-glycosidic linkages in cellulose, cellulose derivatives (such as carboxy methyl cellulose and hydroxy ethyl cellulose), lichenin, ⁇ -1,4 bonds in mixed ⁇ -1,3 glucans such as cereal ⁇ -D-glucans or xyloglucans and other plant material containing cellulosic parts.
- endo-1,4- ⁇ -D-glucan 4-glucano hydrolase endo-1,4- ⁇ -D-glucan 4-glucano hydrolase, but the abbreviated term endoglucanase is used in the present specification.
- T.- M. Enveri “Microbial Cellulases” in W. M. Fogarty, Microbial Enzymes and Biotechnology, Applied Sciences Publishers, p. 183-224 (1983); Methods in Enzymology, (1988) Vol. 160, p. 200-391 (edited by Wood, W. A. and Kellogg, S. T.); Béguin, P., “Molecular Biology of Cellulose Degradation”, Annu. Rev. Microbiol. (1990), Vol. 44, pp. 219-248; Béguin, P.
- Cellulases are synthesized by a large number of microorganisms which include fungi, actinomycetes, myxobacteria and true bacteria but also by plants. Especially endoglucanases of a wide variety of specificities have been identified
- a very important industrial use or cellulolytic enzymes is the use for treatment of cellulosic textile or fabric, e.g. as ingredients in detergent compositions or fabric softener compositions, for bio-polishing of new fabric (garment finishing), and for obtaining a “stone-washed” look of cellulose-containing fabric, especially denim, and several methods for such treatment have been suggested, e.g. in GB-A-1 368 599, EP-A-0 307 564 and EP-A-0 435 876, WO 91/17243, WO 91/10732, WO 91/17244, PCT/DK95/000108 and PCT/DK95/00132.
- Another important industrial use of cellulolytic enzymes is the use for treatment of paper pulp, e.g. for improving the drainage or for deinking of recycled paper.
- CBD cellulose binding domain
- Fungi and bacteria produces a spectrum of cellulolytic enzymes (cellulases) which, on the basis of sequence similarities (hydrophobic cluster analysis), can be classified into different families of glycosyl hydrolases [Henrissat B & Bairoch A; Biochem. J. 1993 293 781-788]. At present are known cellulases belonging to the families 5, 6, 7, 8, 9, 10, 12, 26, 44, 45, 48, 60, and 61 of glycosyl hydrolases.
- the present invention provides a method for improving the properties of a cellulolytic enzyme by amino acid substitution, deletion or insertion, the method comprising the steps of:
- the invention provides cellulase variants improved with respect to altered (increased or decreased) catalytic activity; and/or altered sensitivity to anionic tensides; and/or altered pH optimum and pH profile activity-wise as well as stability-wise.
- the invention provides a cellulase variant derived from a parental cellulase by substitution, insertion and/or deletion, which variant has a catalytic core domain, in which the variant
- At position 5 holds an alanine residue (A), a serine residue (S), or a threonine residue (T);
- the present invention provides new cellulase variants derived from a parental cellulase by substitution, insertion and/or deletion.
- a cellulase variant of this invention is a cellulase variant or mutated cellulase, having an amino acid sequence not found in nature.
- the cellulase variants of the invention show improved performance, in particular with respect to increased catalytic activity; and/or altered sensitivity to anionic tensides; and/or altered pH optimum; and/or altered thermostability.
- the cellulase variant or mutated cellulase of this invention may be regarded a functional derivative of a parental cellulase (i.e. the native or wild-type enzyme), and may be obtained by alteration of a DNA nucleotide sequence of the parental gene or its derivatives, encoding the parental enzyme.
- the cellulase variant or mutated cellulase may be expressed and produced when the DNA nucleotide sequence encoding the cellulase variant is inserted into a suitable vector in a suitable host organism.
- the host organism is not necessarily identical to the organism from which the parental gene originated.
- enzyme variants have also been referred to as mutants or muteins.
- the cellulases (a-i) are described in WO 96/29397, (j) is described in GeneBank under the accession number G45498, and (k) is described in GeneBank under the accession number S81598 and in Biol. Chem. Hoppe-Seyler 1995 376 (10) 617-625.
- Amino acid residues which represent insertions in relation to the amino acid sequence of the cellulase from Humicola insolens are numbered by the addition of letters in alphabetical order to the preceding cellulase number, such as e.g. position *21aV for the “inserted” valine (V), where no amino acid residue is present, between lysine at position 21 and alanine at position 22 of the amino acid sequence of the cellulase from Humicola insolens , cf. Table 1.
- P49* Deletion of a proline (P) at position 49 in the amino acid sequence of the cellulase from Humicola insolens is indicated as P49*.
- cellulose numbering refers to the cellulase numbers described above, and are determined relative to the amino acid sequence of the cellulase derived from Humicola insolens , cf. Table 1, (a). TABLE 1 Amino Acid Sequence Alignment; Cellulase Numbering of Selected Cellulases of Different Microbial Origin (a) Humicola insolens ; (b) Acremonium sp.
- the present invention relates to cellulase variants. More specifically the present invention provides cellulase variant derived from a parental cellulase by substitution, insertion and/or deletion, which variant has a catalytic core domain, in which the variant
- At position 5 holds an alanine residue (A), a serine residue (S), or a threonine residue (T);
- the endoglucanase of the invention may comprise a cellulose binding domain (CBD) existing as an integral part of the enzyme, or a CBD from another origin may be introduced into the endoglucanase thus creating an enzyme hybride.
- CBD cellulose binding domain
- the term “cellulose-binding domain” is intended to be understood as defined by Peter Tomme et al. “Cellulose-Binding Domains: Classification and Properties” in “Enzymatic Degradation of Insoluble Carbohydrates”, John N. Saddler and Michael H. Penner (Eds.), ACS Symposium Series, No. 618, 1996.
- CBDs are found in various enzymes such as cellulases, xylanases, mannanases, arabinofuranosidases, acetyl (esterases and chitinases.
- CBDs have also been found in algae, e.g. the red alga Porphyra purpurea as a non-hydrolytic polysaccharide-binding protein, see Tomme et al., op.cit.
- most of the CBDs are from cellulases and xylanases, CBDs are found at the N and C termini of proteins or are internal.
- Enzyme hybrids are known in the art, see e.g. WO 90/00609 and WO 95/16782, and may be prepared by transforming into a host cell a DNA construct comprising at least a fragment of DNA encoding the cellulose-binding domain ligated, with or without a linker, to a DNA sequence encoding the endoglucanase and growing the host cell to express the fused gene.
- Enzyme hybrids may be described by the following formula:
- CBD is the N-terminal or the C-terminal region of an amino acid sequence corresponding to at least the cellulose-binding domain
- MR is the middle region (the linker), and may be a bond, or a short linking group preferably of from about 2 to about 100 carbon atoms, more preferably of from 2 to 40 carbon atoms; or is preferably from about 2 to about 100 amino acids, more preferably of from 2 to 40 amino acids
- X is an N-terminal or C-terminal region of the enzyme according to the invention.
- the present invention relates to a method for improving the properties of a cellulolytic enzyme by amino acid substitution, deletion or insertion, the method comprising the steps of:
- Step f. of the method is preferably carried out by choosing positions which, as a result of the alignment of step a., carry the same amino acid residue in a majority of the aligned sequences; more preferably in at least 63% of the aligned sequences; even more preferably positions which, in the aligned sequences, carries different amino acid residues, cf. below.
- the specific activity of the cellulase can be improved, preferably by carrying out a substition, deletion or insertion at amino acid residue positions present in a distance from the substrate binding cleft of not more than 5 ⁇ , more preferably not more than 3 ⁇ , even more preferably not more than 2.5 ⁇ . It is believed that residues present in a distance of not more than 2.5 ⁇ are capable of being in direct contact with the substrate.
- the pH activity profile, the pH activity optimum, the pH stability profile, or the pH stability optimum of the cellulase can be altered, preferably by carrying out a substitution, deletion or insertion at amino acid residue positions present either in a distance from the substrate binding cleft of not more than 5 ⁇ , more preferably not more than 3 ⁇ , even more preferably not more than 2.5 ⁇ ; or at surface-exposed amino acid residue positions of the enzyme, thereby altering the electrostatic environment either locally or globally. It is preferred to perform a substitution involving a charged or potentially charged residue, this residue either being the original residue or the replacement residue. In the present context, charged or potentially charged residues are meant to include: Arg, Lys, His, Cys (if not part of a disulfide bridge), Tyr, Glu, Asp.
- the stability of the cellulase in the presence of an anionic tenside or anionic detergent component can be altered, preferably by carrying out a substitution, deletion or insertion at surface-exposed amino acid residue positions of the enzyme, thereby altering the electrostatic environment either locally or globally. It is preferred to perform a substitution involving a charged or potentially charged residue, this residue either being the original residue or the replacement residue.
- charged or potentially charged residues are meant to include: Arg, Lys, His, Cys (if not part of a disulfide bridge), Tyr, Glu, Asp.
- Mutations towards a more negatively charged aa residue result in improved stability of the cellulase in the presence of an anionic tenside, whereas mutations towards a more positively charged aa residue decreases the stability of the cellulase towards anionic tensides.
- cellulase variants comprising any combination of two or more of the amino acid substitutions, deletions or insertions disclosed herein are also within the scope of the present invention, cf. the exemplified variants.
- the multiple sequence alignment is performed using the Pileup algorithm as implemented in the Wisconsin Sequence Analysis Package version 8.1-UNIX (GCG, Genetics Computer Group, Inc.). The method used is similar to the method described by Higgens and Sharp (CARBIOS 1989 5 151-153). A gap creation penalty of 3.0 and a gap extension penalty of 0.1 is used together with a scoring matrix as described in Nucl. Acids Res. 1986 14 (16) 6745-6763 (Dayhoff table (Schwartz, R. M. and Dayhoff, M. O.; Atlas of Protein Sequence and Structure (Dayhoff, M. O. Ed.); National Biomedical Research Foundation, Washington D.C.
- a pair-wise sequence alignment is performed using the algorithm described by Needleman & Wunsch ( J. Mol. Biol. 1970 48 443-453), as implemented in the GAP routine in the Wisconsin Sequence Analysis Package (GCG).
- GCG Wisconsin Sequence Analysis Package
- a pair-wise sequence alignment with forced pairing of residues is performed using the algorithm described by Needleman & Wunsch ( J. Mol. Biol. 1970 48 443-453), as implemented in the GAP routine in the Wisconsin Sequence Analysis Package (GCG).
- GCG Wisconsin Sequence Analysis Package
- the parameters used for the GAP routine are the same as mentioned for the Pileup routine earlier, where the scoring matrix is modified to incorporate a residue named X which symbolize the residues to be paired.
- the diagonal value for X paired with X is set to 9.0 and all off diagonal values involving X is set to 0.
- SCRs Structurally conserveed Regions
- the known X-ray structure of the Humicola insolens EGV cellulase will in the following be termed the reference structure.
- the structure to be modeled will be termed the model structure.
- Ad 1 The approximate extent of the core part of the enzyme is determined by a multiple sequence alignment including many known cellulase sequences. Since the reference structure only contain atomic coordinates for the core part of the enzyme only the residues in the sequence to be modeled which align with the core part of the reference structure can be included in the model building. This alignment also determines the alignment of the cysteine. The multiple sequence alignment is performed using the Pileup algorithm as described earlier.
- Ad 2 A pair-wise sequence alignment is performed as described earlier. If the cysteine in the conserved disulfide bridges and/or the active site residues (D10 and D121) does not align, a pair-wise sequence alignment using forced pairing of the cysteines in the conserved disulfide bridges and/or the active site residues is performed as described earlier. The main purpose of the sequence alignment is to define SCRs (see later) to be used for a model structure generation.
- Ad 3 Based on the sequence alignment Structurally conserveed Regions (SCRs) are defined as continuous regions of overlapping sequence with no insertions or deletions.
- Ad 4 Using the computer program Homology 95.0 (Homology User Guide, October 1995. San Diego: Biosym/MSI, 1995.) atomic coordinates in the model structure can be generated from the atomic coordinates of the reference structure using the command AssignCoords Sequences.
- Ad 5 Using the computer program Homology 95.0 possible conformations for the remaining regions, named Variable Regions (VRs) are found by a search in the loop structure database included in Homology 95.0. This procedure is performed for each VR.
- VRs Variable Regions
- Ad 6 If the VR length is smaller than six residues the first loop structure in the database search result is selected for coordinate generation. In cases where longer loops are generated the first solution in the list which does not have severe atomic overlap are selected. The degree of atomic overlap can be analyzed using the Bump Monitor Add Intra command in the computer program Insight II 95.0 (Insight II 95.0 User Guide, October 1995. San Diego: Biosym/MSI, 1995.) a parameter of 0.25 for the Bump command will show the severe overlap. If more than ten bumps exists between the inserted loop region and the remaining part of the protein the next solution is tested. If no solution is found with these parameters, the solution with the fewest bumps is selected. The coordinates for the VR regions are generated using the command AssignCoords Loops in the program Homology 95.0.
- Ad 7 The disulfide bonds are created using the Bond Create command in the Biopolymer module of Insight II 95.0 and the protonation state is set to match pH 8.0 with charged caps using the Hydrogens command. Finally the active proton donor (the residue equivalent to D121 in the reference structure) is protonated using the residue replace ⁇ D121 residue name> ASP L command. To finalize the data of the model the appropriate forcefield template is applied using the CVFF forcefield through the command Potentials Fix.
- Ad 8 Finally the modeled structure is subjected to 500 cycles energy minimization using the molecular mechanics program Discover 95.0/3.0.1 (Discover 95.0/3.0.0 User Guide, October 1995. San Diego: Biosym/MSI, 1995.).
- the output from the above described procedure is atomic coordinates describing a structural model for the core domain of a new cellulase based on sequence homology to the Humicola insolens EGV cellulase.
- [0115] 2) Perform pair-wise sequence alignment of each sequence with the Humicola insolens EGV cellulase core domain (residues 1-201). If the cysteines in the conserved disulfide bridges does not align at the same positions and/or if the two active site residues (D10 and D121) does not align at the same positions then use the pair-wise sequence alignment of cellulases with forced pairing method. Include only residues in the sequences overlapping with the core domain (residues 1-201) of the Humicola insolens EGV cellulase;
- [0122] 2) Perform pair-wise sequence alignment of each sequence with the Humicola insolens EGV cellulase core domain (residues 1-201). If the cysteines in the conserved disulfide bridges does not align at the same positions and/or if the two active site residues (D10 and D121) does not align at the same positions then use the pair-wise sequence alignment of cellulases with forced pairing method. Include only residues in the sequences overlapping with the core domain (residues 1-201) of the Humicola insolens EGV cellulase;
- Disulfide bridges i.e. Cys-Cys bridges stabilize the structure of the enzyme. It is believed that a certain number of stabilizing disulfide bridges are necessary to maintain the a proper stability of the enzyme. However, it is also contemplated that disulfide bridges can be removed from the protein structure resulting in an enzyme variant which is less stable, especially less thermostable, but which still has significant activity.
- the invention provides a cellulase variant which variant holds 4 or more of the following disulfide bridges: C11-C135; C12-C47; C16-C86; C31-C56; C87-C199; C89-C189; and C156-C167 (cellulase numbering).
- the variant of the invention holds 5 or more of the following disulfide bridges: C11-C135; C12-C47; C16-C86; C31-C56; C87-C199; C89-C189; and C156-C167 (cellulase numbering).
- the variant of the invention holds 6 or more of the following disulfide bridges: C11-C135; C12-C47; C16- ⁇ -C86; C31-C56; C87-C199; C89-C189; and C156-C167 (cellulase numbering).
- the invention provides a cellulase variant in which cysteine has been replaced by another natural amino acid at one or more of the positions 16, 86, 87, 89, 189, and/or 199 (cellulase numbering).
- the invention provides a cellulase variant derived from a parental cellulase by substitution, insertion and/or deletion at one or more amino acid residues located in the substrate binding cleft. Mutations introduced at positions close to the substrate affect the enzyme-substrate interactive bindings.
- An appropriate way of determining the residues interacting with a potential substrate in a structure is to partitionate the structure in “shells”.
- the shells are defined as: 1st shell are residues directly interacting with the substrate, i.e. closest inter atomic distance between substrate and residue both including hydrogen atoms are smaller than 2.5 ⁇ which will include all direct interaction via hydrogen bonds and other non bonded interactions.
- the subsequent (2nd, 3rd e.t.c.) shells are defined in the same way, as the residues with inter atomic distances smaller than 2.5 ⁇ to the substrate or all previously determined shells. In this way the structure will be partitioned in shells.
- the routine “subset zone” in the program Insight II 95.0 Insight II 95.0 User Guide, October 1995. San Diego: Biosym/MSI, 1995.
- Insight II 95.0 Insight II 95.0 User Guide, October 1995. San Diego: Biosym/MSI, 1995.
- the amino acid residue contemplated according to this invention is located in the substrate binding cleft at a distance of up to 5 ⁇ from the substrate.
- the invention provides a cellulase variant which has been derived from a parental cellulase by substitution, insertion and/or deletion at one or more of these acid residues.
- the cellulase variant is derived from one of the cellulases identified in Table 2 ((a) Humicola insolens ; (b) Acremonium sp.; (c) Volutella collectotrichoides; (d) Sordaria fimicola; (e) Thielavia terrestris; (f) Fusarium oxysporum; (g) Myceliophthora thermophila; (h) Crinipellis scabella; (i) Macrophomina phaseolina; (j) Pseudomonas fluorescens; (k) Ustilago maydis ), by substitution, insertion and/or deletion at one or more of the positions identified in Table 2 for these cellulases.
- the amino acid residue contemplated according to this invention is located in the substrate binding cleft at a distance of up to 3 ⁇ from the substrate.
- the invention provides a cellulase variant which has been derived from a parental cellulase by substitution, insertion and/or deletion at one or more of these acid residues.
- the cellulase variant is derived from one of the cellulases identified in Table 3 ((a) Humicola insolens; (b) Acremonium sp.; (c) Volutella collectotrichoides; (d) Sordaria fimicola; (e) Thielavia terrestris; (f) Fusarium oxysporum; (g) Myceliophthora thermophila; (h) Crinipellis scabella; (i) Macrophomina phaseolina; (j) Pseudomonas fluorescens; (k) Ustilago maydis ), by substitution, insertion and/or deletion at one or more of the positions identified in Table 3 for these cellulases.
- a “partly conserved amino acid residue” is an amino acid residue identified according to Table 1, at a position at which position between 7 to 10 amino acid residues of the 11 residues (i.e. more than 63%) indicated in Table 1 for that position, are identical.
- the invention further provides a cellulase variant, in which variant an amino acid residue has been changed into a conserved amino acid residue at one or more positions according to Table 1, at which position(s) between 7 and 10 amino acid residues of the 11 residues identified in Table 1, are identical.
- the invention provides a cellulase variant, which has been derived from a parental cellulase by substitution, insertion and/or deletion at one or more of the following positions: 13, 14, 15, 20, 21, 22, 24, 28, 32, 34, 45, 48, 50, 53, 54, 62, 63, 64, 65, 6E6, 68, 69, 70, 71, 72, 73, 74, 75, 79, 85, 88, 90, 92, 93, 95, 96, 97, 98, 99, 104, 106, 110, 111, 113, 115, 116, 118, 119, 131, 134, 138, 140, 146, 152, 153, 163, 166, 169, 170, 171, 172, 173, 174, 174, 177, 178, 179, 180, 193, 196, and/or 197 (cellulase numbering).
- the invention provides a cellulase variant that has been subjected to substitutions, insertions and/or deletions, so as to comprise one or more of the amino acid residues at the positions identified in Table 4, below.
- the positions in Table 4 reflects the “partly conserved amino acid residue positions” as well as the non-conserved positions present within 5 ⁇ of the substrate in binding cleft all of which indeed are present in the aligned sequences in Table 1.
- the invention provides a cellulase variant derived from a parental cellulase by substitution, insertion and/or deletion at one or more amino acid residues as indicated in Tables 5-6, below.
- the cellulase variant may be derived from any parental cellulase holding the amino acid residue stated at the position indicated.
- the parental cellulase may be a Humicola insolens cellulase; an Acremonium sp.
- Cellulase a Volutella collectotrichoides cellulase; a Sordaria fimicola cellulase; a Thielavia terrestris cellulase; a Fusariuim oxysporum cellulase; a Myceliophthora thermophila cellulase; a Crinipellis scabella cellulase; a Macrophomina phaseolina cellulase; a Pseudomonas fluorescens cellulase; or a Ustilago maydis cellulase.
- the cellulase variant may be characterized by having improved performance, in particular with respect to
- anionic tensides are products frequently incorporated into detergent compositions. Sometimes cellulolytic enzymes having an increased stability towards anionic tensides is a desire, and sometimes cellulolytic enzymes having an increased sensitivity are preferred. In a further aspect the invention provides cellulase variants of an altered anionic tenside sensitivity.
- a cellulase variant of the invention of altered anionic tenside sensitivity is a cellulase variant which has been derived from a parental cellulase by substitution, insertion and/or deletion at one or more of the following positions: 2, 4, 7, 8, 10, 13, 15, 19, 20, 21, 25, 26, 29, 32, 33, 34, 35, 37, 40, 42, 42a, 43, 44, 48, 53, 54, 55, 58, 59, 63, 64, 65, 66, 67, 70, 72, 76, 79, 80, 82, 84, 86, 88, 90, 91, 93, 95, 95d, 95h, 95j, 97, 100, 101, 102, 103, 113, 114, 117, 119, 121, 133, 136, 137, 138, 139, 140a, 141, 143a, 145, 146, 147, 150e, 150j, 151, 152, 153, 154, 155,
- the cellulase variant is derived from one of the cellulases identified in Table 7, below, ((a) Humicola insolens; (b) Acremonium sp.; (c) Volutella collectotrichoides; (d) Sordaria fimicola; (e) Thielavia terrestris; (f) Fusarium oxysporum; (g) Myceliophthora thermophila; (h) Crinipellis scabella; (i) Macrophomina phaseolina; (j) Pseudomonas fluorescens; (k) Ustilago maydis), by substitution, insertion and/or deletion at one or more of the positions identified in Table 7 for these cellulases.
- the present invention relates to an enzyme composition comprising an enzyme exhibiting cellulolytic activity as described above.
- the enzyme composition of the invention may, in addition to the cellulase of the invention, comprise one or more other enzyme types, for instance hemi-cellulase such as xylanase and mannanase, other cellulase components, chitinase, lipase, esterase, pectinase, cutinase, phytase, oxidoreductase, peroxidase, laccase, oxidase, pactinmethylesterase, polygalacturonase, protease, or amylase.
- hemi-cellulase such as xylanase and mannanase
- other cellulase components such as xylanase and mannanase
- chitinase such as xylanase and mannanase
- lipase such as xylanase and mannanase
- the enzyme composition may be prepared in accordance with methods known in the art and may be in the form of a liquid or a dry composition.
- the enzyme composition may be in the form of a granulate or a microgranulate.
- the enzyme to be included in the composition may be stabilized in accordance with methods known in the art.
- the enzyme composition according to the invention may be useful for at least one of the following purposes.
- de-pilling denotes removing of pills from the fabric surface.
- soaking liquor denotes an aqueous liquor in which laundry may be immersed prior to being subjected to a conventional washing process.
- the soaking liquor may contain one or more ingredients conventionally used in a washing or laundering process.
- washing liquor denotes an aqueous liquor in which laundry is subjected to a washing process, i.e. usually a combined chemical and mechanical action either manually or in a washing machine.
- the washing liquor is an aqueous solution of a powder or liquid detergent composition.
- rinsing liquor denotes an aqueous liquor in which laundry is immersed and treated, conventionally immediately after being subjected to a washing process, in order to rinse the laundry, i.e. essentially remove the detergent solution from the laundry.
- the rinsing liquor may contain a fabric conditioning or softening composition.
- the laundry subjected to the method of the present invention may be conventional washable laundry.
- the major part of the laundry is sewn or un-sewn fabrics, including knits, wovens, denims, yarns, and toweling, made from cotton, cotton blends or natural or manmade cellulosics (e.g. originating from xylan-containing cellulose fibers such as from wood pulp) or blends thereof.
- blends are blends of cotton or rayon/viscose with one or more companion material such as wool, synthetic fibers (e.g.
- polyamide fibers acrylic fibers, polyester fibers, polyvinyl alcohol fibers, polyvinyl chloride fibers, polyvinylidene chloride fibers, polyurethane fibers, polyurea fibers, aramid fibers), and cellulose-containing fibers (e.g. rayon/viscose, ramie, flax/linen, jute, cellulose acetate fibers, lyocell).
- cellulose-containing fibers e.g. rayon/viscose, ramie, flax/linen, jute, cellulose acetate fibers, lyocell.
- the detergent compositions according to the present invention comprise a surfactant system, wherein the surfactant can be selected from nonionic and/or anionic and/or cationic and/or ampholytic and/or zwitterionic and/or semi-polar surfactants.
- the surfactant is typically present at a level from 0.1% to 60% by weight.
- the surfactant is preferably formulated to be compatible with enzyme components present in the composition.
- the surfactant is most preferably formulated in such a way that it promotes, or at least does not degrade, the stability of any enzyme in these compositions.
- Preferred systems to be used according to the present invention comprise as a surfactant one or more of the nonionic and/or anionic surfactants described herein.
- Polyethylene, polypropylene, and polybutylene oxide condensates of alkyl phenols are suitable for use as the nonionic surfactant of the surfactant systems of the present invention, with the polyethylene oxide condensates being preferred.
- These compounds include the condensation products of alkyl phenols having an alkyl group containing from about 6 to about 14 carbon atoms, preferably from about 8 to about 14 carbon atoms, in either a straight chain or branched-chain configuration with the alkylene oxide.
- the ethylene oxide is present in an amount: equal to from about 2 to about 25 moles, more preferably from about 3 to about 15 moles, of ethylene oxide per mole of alkyl phenol.
- nonionic surfactants of this type include IgepalTM CO-630, marketed by the GAF Corporation; and TritonTM X-45, X-114, X-100 and X-102, all marketed by the Rohm & Haas Company. These surfactants are commonly referred to as alkylphenol alkoxylates (e.g., alkyl phenol ethoxylat(es).
- the condensation products of primary and secondary aliphatic alcohols with about 1 to about 25 moles of ethylene oxide are suitable for use as the nonionic surfactant of the nonionic surfactant systems of the present invention.
- the alkyl chain of the aliphatic alcohol can either be straight or branched, primary or secondary, and generally contains from about 8 to about 22 carbon atoms.
- About 2 to about 7 moles of ethylene oxide and most preferably from 2 to 5 moles of ethylene oxide per mole of alcohol are present in said condensation products.
- nonionic surfactants of this type include TergitolTM 15-S-9 (The condensation product of C11-C15 linear alcohol with 9 moles ethylene oxide), TergitolTM 24-L-6 NMW (the condensation product of C12-C14 primary alcohol with 6 moles ethylene oxide with a narrow molecular weight distribution), both marketed by Union Carbide Corporation; NeodolTM 45-9 (the condensation product of C14-C15 linear alcohol with 9 moles of ethylene oxide), NeodolTM 23-3 (the condensation product of C12-C13 linear alcohol with 3.0 moles of ethylene oxide), NeodolTM 45-7 (the condensation product of C14-C15 linear alcohol with 7 moles of ethylene oxide), NeodolTM 45-5 (the condensation product of C14-C15 linear alcohol with 5 moles of ethylene oxide) marketed by Shell Chemical Company, KyroTM EOB (the condensation product of C13-C15 alcohol with 9 moles ethylene oxide), marketed by The Procter & Gamble Company, and Genapol
- alkylpolysaccharides disclosed in U.S. Pat. No. 4,565,647, having a hydrophobic group containing from about 6 to about 30 carbon atoms, preferably from about 10 to about 16 carbon atoms and a polysaccharide, e.g. a polyglycoside, hydrophilic group containing from about 1.3 to about 10, preferably from about 1.3 to about 3, most preferably from about 1.3 to about 2.7 saccharide units.
- Any reducing saccharide containing 5 or 6 carbon atoms can be used, e.g., glucose, galactose and galactosyl moieties can be substituted for the glucosyl moieties (optionally the hydrophobic group is attached at the 2-, 3-, 4-, etc. positions thus giving a glucose or galactose as opposed to a glucoside or galactoside).
- the intersaccharide bonds can be, e.g., between the one position of the additional saccharide units and the 2-, 3-, 4-, and/or 6- positions on the preceding saccharide units.
- R2 is selected from the group consisting of alkyl, alkylphenyl, hydroxyalkyl, hydroxyalkylphenyl, and mixtures thereof in which the alkyl groups contain from about 10 to about 18, preferably from about 12 to about 14, carbon atoms; n is 2 or 3, preferably 2; t is from 0 to about 10, preferably 0; and x is from about 1.3 to about 10, preferably from about 1.3 to about 3, most preferably from about 1.3 to about 2.7.
- the glycosyl is preferably derived from glucose. To prepare these compounds, the alcohol or alkylpolyethoxy alcohol is formed first and then reacted with glucose, or a source of glucose, to form the glucoside (attachment at the 1-position). The additional glycosyl units can then be attached between their 1-position and the preceding glycosyl units 2-, 3-, 4-, and/or 6-position, preferably predominantly the 2-position.
- the condensation products of ethylene oxide with a hydrophobic base formed by the condensation of propylene oxide with propylene glycol are also suitable for use as the additional nonionic surfactant systems of the present invention.
- the hydrophobic portion of these compounds will preferably have a molecular weight from about 1500 to about 1800 and will exhibit water insolubility.
- the addition of polyoxyethylene moieties to this hydrophobic portion tends to increase the water solubility of the molecule as a whole, and the liquid character of the product is retained up to the point where the polyoxyethylene content is about 50% of the total weight of the condensation product, which corresponds to condensation with up to about 40 moles of ethylene oxide.
- Examples of compounds of this type include certain of the commercially available PluronicTM surfactants, marketed by BASF.
- nonionic surfactant of the nonionic surfactant system of the present invention are the condensation products of ethylene oxide with the product resulting from the reaction of propylene oxide and ethylenediamine.
- the hydrophobic moiety of these products consists of the reaction product of ethylenediamine and excess propylene oxide, and generally has a molecular weight of from about 2500 to about 3000.
- This hydrophobic moiety is condensed with ethylene oxide to the extent that the condensation product contains from about 40% to about 80% by weight of polyoxyethylene and has a molecular weight of from about 5,000 to about 11,000.
- this type of nonionic surfactant include certain of the commercially available TetronicTM compounds, marketed by BASF.
- Preferred for use as the nonionic surfactant of the surfactant systems of the present invention are polyethylene oxide condensates of alkyl phenols, condensation products of primary and secondary aliphatic alcohols with from about 1 to about 25 moles of ethyleneoxide, alkylpolysaccharides, and mixtures hereof. Most preferred are C8-C14 alkyl phenol ethoxylates having from 3 to 15 ethoxy groups and C8-C18 alcohol ethoxylates (preferably C10 avg.) having from 2 to 10 ethoxy groups, and mixtures thereof.
- Highly preferred nonionic surfactants are polyhydroxy fatty acid amide surfactants of the formula
- R1 is H, or R1 is C1-4 hydrocarbyl, 2-hydroxyethyl, 2-hydroxypropyl or a mixture thereof, R2 is C5-31 hydrocarbyl, and Z is a polyhydroxyhydrocarbyl having a linear hydrocarbyl chain with at least 3 hydroxyls directly connected to the chain, or an alkoxylated derivative thereof.
- R1 is methyl
- R2 is straight C11-15 alkyl or C16-18 alkyl or alkenyl chain such as coconut alkyl or mixtures thereof
- Z is derived from a reducing sugar such as glucose, fructose, maltose or lactose, in a reductive amination reaction.
- Highly preferred anionic surfactants include alkyl alkoxylated sulfate surfactants.
- Examples hereof are water soluble salts or acids of the formula RO(A)mSO3M wherein R is an unsubstituted C10-C-24 alkyl or hydroxyalkyl group having a C10-C24 alkyl component, preferably a C12-C20 alkyl or hydroxyalkyl, more preferably C12-C18 alkyl or hydroxyalkyl, A is an ethoxy or propoxy unit, m is greater than zero, typically between about 0.5 and about 6, more preferably between about 0.5 and about 3, and M is H or a cation which can be, for example, a metal cation (e.g., sodium, potassium, lithium, calcium, magnesium, etc.), ammonium or substituted-ammonium cation.
- R is an unsubstituted C10-C-24 alkyl or hydroxyalkyl group having a C10-C24 alky
- Alkyl ethoxylated sulfates as well as alkyl propoxylated sulfates are contemplated herein.
- Specific examples of substituted ammonium cations include methyl-, dimethyl, trimethyl-ammonium cations and quaternary ammonium cations such as tetramethyl-ammonium and dimethyl piperdinium cations and those derived from alkylamines; such as ethylamine, diethylamine, triethylamine, mixtures thereof, and the like.
- Exemplary surfactants are C12-C18 alkyl polyethoxylate (1.0) sulfate (C12-C18E(1.0)M), C12-C18 alkyl polyethoxylate (2.25) sulfate (C12-C18(2.25)M, and C12-C18 alkyl polyethoxylate (3.0) sulfate (C12-C18E(3.0)M), and C12-C18 alkyl polyethoxylate (4.0) sulfate (C12-C18E(4.0)M), wherein M is conveniently selected from sodium and potassium.
- Suitable anionic surfactants to be used are alkyl ester sulfonate surfactants including linear esters of C8-C20 carboxylic acids (i.e., fatty acids) which are sulfonated with gaseous SO3 according to “The Journal of the American Oil Chemists Society”, 52 (1975), pp. 323-329.
- Suitable starting materials would include natural fatty substances as derived from tallow, palm oil, etc.
- alkyl ester sulfonate surfactant especially for laundry applications, comprise alkyl ester sulfonate surfactants of the structural formula:
- R3 is a C8-C20 hydrocarbyl, preferably an alkyl, or combination thereof
- R4 is a C1-C6 hydrocarbyl, preferably an alkyl, or combination thereof
- M is a cation which forms a water soluble salt with the alkyl ester sulfonate.
- Suitable salt-forming cations include metals such as sodium, potassium, and lithium, and substituted or unsubstituted ammonium cations, such as monoethanolamine, diethonolamine, and triethanolamine.
- R3 is C10-C16 alkyl
- R4 is methyl, ethyl or isopropyl.
- the methyl ester sulfonates wherein R3 is C10-C16 alkyl.
- alkyl sulfate surfactants which are water soluble salts or acids of the formula ROSO3M wherein R preferably is a C10-C24 hydrocarbyl, preferably an alkyl or hydroxyalkyl having a C10-C20 alkyl component, more preferably a C12-C18 alkyl or hydroxyalkyl, and M is H or a cation, e.g., an alkali metal cation (e.g. sodium, potassium, lithium), or ammonium or substituted ammonium (e.g.
- R preferably is a C10-C24 hydrocarbyl, preferably an alkyl or hydroxyalkyl having a C10-C20 alkyl component, more preferably a C12-C18 alkyl or hydroxyalkyl
- M is H or a cation, e.g., an alkali metal cation (e.g. sodium, potassium, lithium), or ammonium or substituted ammonium (e.g
- alkylamines such as ethylamine, diethylamine, triethylamine, and mixtures thereof, and the like.
- alkyl chains of C12-C16 are preferred for lower wash temperatures (e.g. below about 50° C.) and C16-C18 alkyl chains are preferred for higher wash temperatures (e.g. above about 50° C.).
- anionic surfactants useful for detersive purposes can also be included in the laundry detergent compositions of the present invention. Theses can include salts (including, for example, sodium, potassium, ammonium, and substituted ammonium salts such as mono- di- and triethanolamine salts) of soap, C8-C22 primary or secondary alkanesulfonates, C8-C24 olefinsulfonates, sulfonated polycarboxylic acids prepared by sulfonation of the pyrolyzed product of alkaline earth metal citrates, e.g., as described in British patent specification No.
- salts including, for example, sodium, potassium, ammonium, and substituted ammonium salts such as mono- di- and triethanolamine salts
- C8-C22 primary or secondary alkanesulfonates C8-C24 olefinsulfonates
- sulfonated polycarboxylic acids prepared by sulfonation of the pyrolyzed product of
- alkylpolyglycolethersulfates (containing up to 10 moles of ethylene oxide); alkyl glycerol sulfonates, fatty acyl glycerol sulfonates, fatty oleyl glycerol sulfates, alkyl phenol ethylene oxide ether sulfates, paraffin sulfonates, alkyl phosphates, isethionates such as the acyl isethionates, N-acyl taurates, alkyl succinamates and sulfosuccinates, monoesters of sulfosuccinates (especially saturated and unsaturated C12-C18 monoesters) and diesters of sulfosuccinates (especially saturated and unsaturated C6-C12 diesters), acyl sarcosinates, sulfates of alkylpolysaccharides such as the sulfates of
- Alkylbenzene sulfonates are highly preferred. Especially preferred are linear (straight-chain) alkyl benzene sulfonates (LAS) wherein the alkyl group preferably contains from 10 to 18 carbon atoms.
- LAS linear (straight-chain) alkyl benzene sulfonates
- the laundry detergent compositions of the present invention typically comprise from about 1% to about 40%, preferably from about 3% to about 20% by weight of such anionic surfactants.
- the laundry detergent compositions of the present invention may also contain cationic, ampholytic, zwitterionic, and semi-polar surfactants, as well as the nonionic and/or anionic surfactants other than those already described herein.
- Cationic detersive surfactants suitable for use in the laundry detergent compositions of the present invention are those having one long-chain hydrocarbyl group.
- cationic surfactants include the ammonium surfactants such as alkyltrimethylammonium halogenides, and those surfactants having the formula:
- R2 is an alkyl or alkyl benzyl group having from about 8 to about 18 carbon atoms in the alkyl chain
- each R3 is selected form the group consisting of —CH2CH2—, —CH2CH(CH3)—, —CH2CH(CH20H)—, —CH2CH2CH2—, and mixtures thereof
- each R4 is selected from the group consisting of C1-C4 alkyl, C1-C4 hydroxyalkyl, benzyl ring structures formed by joining the two R4 groups, —CH2CHOHCHOHCOR6CHOHCH2OH, wherein R6 is any hexose or hexose polymer having a molecular weight less than about 1000, and hydrogen when y is not 0
- R5 is the same as R4 or is an alkyl chain, wherein the total number of carbon atoms or R2 plus R5 is not more than about 18
- each y is from 0 to about 10, and the sum of
- Highly preferred cationic surfactants are the water soluble quaternary ammonium compounds useful in the present composition having the formula:
- R1 is C8-C16 alkyl
- each of R2, R3 and R4 is independently C1-C4 alkyl, C1-C4 hydroxy alkyl, benzyl, and —(C2H40)xH where x has a value from 2 to 5, and X is an anion.
- R2, R3 or R4 should be benzyl.
- the preferred alkyl chain length for R1 is C12-C15, particularly where the alkyl group is a mixture of chain lengths derived from coconut or palm kernel fat or is derived synthetically by olefin build up or OXO alcohols synthesis.
- Preferred groups for R2R3 and R4 are methyl and hydroxyethyl groups and the anion X may be selected from halide, methosulphate, acetate and phosphate ions.
- coconut trimethyl ammonium chloride or bromide coconut trimethyl ammonium chloride or bromide
- choline esters compounds of formula (i) wherein R1 is CH2—CH2—O—C—C12-14 alkyl and R2R3R4 are methyl).
- the laundry detergent compositions of the present invention typically comprise from 0.2% to about 25%, preferably from about 1% to about 8% by weight of such cationic surfactants.
- Ampholytic surfactants are also suitable for use in the laundry detergent compositions of the present invention. These surfactants can be broadly described as aliphatic derivatives of secondary or tertiary amines, or aliphatic derivatives of heterocyclic secondary and tertiary amines in which the aliphatic radical can be straight- or branched-chain.
- One of the aliphatic substituents contains at least about 8 carbon atoms, typically from about 8 to about 18 carbon atoms, and at least one contains an anionic water-solubilizing group, e.g. carboxy, sulfonate, sulfate. See U.S. Pat. No. 3,929,678 (column 19, lines 18-35) for examples of ampholytic surfactants.
- the laundry detergent compositions of the present invention typically comprise from 0.2% to about 15%, preferably from about 1% to about 10% by weight of such ampholytic surfactants.
- Zwitterionic surfactants are also suitable for use in laundry detergent compositions. These surfactants can be broadly described as derivatives of secondary and tertiary amines, derivatives of heterocyclic secondary and tertiary amines, or derivatives of quaternary ammonium, quaternary phosphonium or tertiary sulfonium compounds. See U.S. Pat. No. 3,929,678 (column 19, line 38 through column 22, line 48) for examples of zwitterionic surfactants.
- the laundry detergent compositions of the present invention typically comprise from 0.2% to about 15%, preferably from about 1% to about 10% by weight of such zwitterionic surfactants.
- Semi-polar nonionic surfactants are a special category of nonionic surfactants which include water-soluble amine oxides containing one alkyl moiety of from about 10 to about 18 carbon atoms and 2 moieties selected from the group consisting of alkyl groups and hydroxyalkyl groups containing from about 1 to about 3 carbon atoms; water soluble phosphine oxides containing one alkyl moiety of from about 10 to about 18 carbon atoms and 2 moieties selected from the group consisting of is alkyl groups and hydroxyalkyl groups containing from about 1 to about 3 carbon atoms; and water-soluble sulfoxides containing one alkyl moiety from about 10 to about 18 carbon atoms and a moiety selected from the group consisting of alkyl and hydroxyalkyl moieties of from about 1 to about 3 carbon atoms.
- Semi-polar nonionic detergent surfactants include the amine oxide surfactants having the formula:
- R3 is an alkyl, hydroxyalkyl, or alkyl phenyl group or mixtures thereof containing from about 8 to about 22 carbon atoms
- R4 is an alkylene or hydroxyalkylene group containing from about 2 to about 3 carbon atoms or mixtures thereof
- x is from 0 to about 3
- each R5 is an alkyl or hydroxyalkyl group containing from about 1 to about 3 carbon atoms or a polyethylene oxide group containing from about 1 to about 3 ethylene oxide groups.
- the R5 groups can be attached to each other, e.g., through an oxygen or nitrogen atom, to form a ring structure.
- amine oxide surfactants in particular include C10-C18 alkyl dimethyl amine oxides and C8-C12 alkoxy ethyl dihydroxy ethyl amine oxides.
- the laundry detergent compositions of the present invention typically comprise from 0.2% to about 15%, preferably from about 1% to about 10% by weight of such semi-polar nonionic surfactants.
- compositions according to the present invention may further comprise a builder system.
- a builder system Any conventional builder system is suitable for use herein including aluminosilicate materials, silicates, polycarboxylates and fatty acids, materials such as ethylenediamine tetraacetate, metal ion sequestrants such as aminopolyphosphonates, particularly ethylenediamine tetramethylene phosphonic acid and diethylene triamine pentamethylenephosphonic acid.
- phosphate builders can also be used herein.
- Suitable builders can be an inorganic ion exchange material, commonly an inorganic hydrated aluminosilicate material, more particularly a hydrated synthetic zeolite such as hydrated zeolite A, X, B, HS or MAP.
- inorganic ion exchange material commonly an inorganic hydrated aluminosilicate material, more particularly a hydrated synthetic zeolite such as hydrated zeolite A, X, B, HS or MAP.
- SKS-6 is a crystalline layered silicate consisting of sodium silicate (Na2Si2O5).
- Suitable polycarboxylates containing one carboxy group include lactic acid, glycolic acid and ether derivatives thereof as disclosed in Belgian Patent Nos. 831,368, 821,369 and 821,370.
- Polycarboxylates containing two carboxy groups include the water-soluble salts of succinic acid, malonic acid, (ethylenedioxy) diacetic acid, maleic acid, diglycollic acid, tartaric acid, tartronic acid and fumaric acid, as well as the ether carboxylates described in German Offenle-enschrift 2,446,686, and 2,446,487, U.S. Pat. No. 3,935,257 and the sulfinyl carboxylates described in Belgian Patent No. 840,623.
- Polycarboxylates containing three carboxy groups include, in particular, water-soluble citrates, aconitrates and citraconates as well as succinate derivatives such as the carboxymethyloxysuccinates described in British Patent No. 1,379,241, lactoxysuccinates described in Netherlands Application 7205873, and the oxypolycarboxylate materials such as 2-oxa-1,1,3-propane tricarboxylates described in British Patent No. 1,387,447.
- Polycarboxylates containing four carboxy groups include oxydisuccinates disclosed in British Patent No. 1,261,829, 1,1,2,2,-ethane tetracarboxylates, 1,1,3,3-propane tetracarboxylates containing sulfo substituents include the sulfosuccinate derivatives disclosed in British Patent Nos. 1,398,421 and 1,398,422 and in U.S. Pat. No. 3,936,448, and the sulfonated pyrolysed citrates described in British Patent No. 1,082,179, while polycarboxylates containing phosphone substituents are disclosed in British Patent No. 1,439,000.
- Alicyclic and heterocyclic polycarboxylates include cyclopentane-cis,cis-cis-tetracarboxylates, cyclopentadienide pentacarboxylates, 2,3,4,5-tetrahydro-furan—cis, cis, cis-tetracarboxylates, 2,5-tetrahydro-furan-tetrahydro-furan-cis, discarboxylates, 2,2,5,5,-tetrahydrofuran—tetracarboxylates, 1,2,3,4,5,6-hexane—hexacarboxylates and carboxymethyl derivatives of polyhydric alcohols such as sorbitol, mannitol and xylitol.
- Aromatic polycarboxylates include mellitic acid, pyromellitic acid and the phthalic acid derivatives disclosed in British Patent No. 1,425,343.
- the preferred polycarboxylates are hydroxy-carboxylates containing up to three carboxy groups per molecule, more particularly citrates.
- Preferred builder systems for use in the present compositions include a mixture of a water-insoluble aluminosilicate builder such as zeolite A or of a layered silicate (SKS-6), and a water-soluble carboxylate chelating agent such as citric acid.
- a water-insoluble aluminosilicate builder such as zeolite A or of a layered silicate (SKS-6)
- a water-soluble carboxylate chelating agent such as citric acid.
- a suitable chelant for inclusion in the detergent composi-ions in accordance with the invention is ethylenediamine-N,N′-disuccinic acid (EDDS) or the alkali metal, alkaline earth metal, ammonium, or substituted ammonium salts thereof, or mixtures thereof.
- EDDS compounds are the free acid form and the sodium or magnesium salt thereof. Examples of such preferred sodium salts of EDDS include Na2EDDS and Na4EDDS. Examples of such preferred magnesium salts of EDDS include MgEDDS and Mg2EDDS. The magnesium salts are the most preferred for inclusion in compositions in accordance with the invention.
- Preferred builder systems include a mixture of a water-insoluble aluminosilicate builder such as zeolite A, and a water soluble carboxylate chelating agent such as citric acid.
- builder materials that can form part of the builder system for use in granular compositions include inorganic materials such as alkali metal carbonates, bicarbonates, silicates, and organic materials such as the organic phosphonates, amino polyalkylene phosphonates and amino polycarboxylates.
- Suitable water-soluble organic salts are the homo- or co-polymeric acids or their salts, in which the polycarboxylic acid comprises at least two carboxyl radicals separated form each other by not more than two carbon atoms.
- Polymers of this type are disclosed in GB-A-1,596,756.
- Examples of such salts are polyacrylates of MW 2000-5000 and their copolymers with maleic anhydride, such copolymers having a molecular weight of from 20,000 to 70,000, especially about 40,000.
- Detergency builder salts are normally included in amounts of from 5% to 80% by weight of the composition. Preferred levels of builder for liquid detergents are from 5% to 30%.
- Preferred detergent compositions in addition to the enzyme preparation of the invention, comprise other enzyme(s) which provides cleaning performance and/or fabric care benefits.
- Such enzymes include proteases, lipases, cutinases, amylases, cellulases, peroxidases, oxidases (e.g. laccases).
- protease suitable for use in alkaline solutions can be used. Suitable proteases include those of animal, vegetable or microbial origin. Microbial origin is preferred. Chemically or genetically modified mutants are included.
- the protease may be a serine protease, preferably an alkaline microbial protease or a trypsin-like protease.
- alkaline proteases are subtilisins, especially those derived from Bacillus, e.g., subtilisin Novo, subtilisin Carlsberg, subtilisin 309, subtilisin 147 and subtilisin 168 (described in WO 89/06279).
- trypsin-like proteases are trypsin (e.g. of porcine or bovine origin) and the Fusarium protease described in WO 89/06270.
- Preferred commercially available protease enzymes include those sold under the trade names Alcalase, Savinase, Primase, Durazym, and Esperase by Novo Nordisk A/S (Denmark), those sold under the tradename Maxatase, Maxacal, Maxapem, Properase, Purafect and Purafect OXP by Genencor International, and those sold under the tradename Opticlean and Optimase by Solvay Enzymes.
- Protease enzymes may be incorporated into the compositions in accordance with the invention at a level of from 0.00001% to 2% of enzyme protein by weight of the composition, preferably at a level of from 0.0001% to 1% of enzyme protein by weight of the composition, more preferably at a level of from 0.001% to 0.5% of enzyme protein by weight of the composition, even more preferably at Ea level of from 0.01% to 0.2% of enzyme protein by weight of the composition.
- Lipases Any lipase suitable for use in alkaline solutions can be used. Suitable lipases include those of bacterial or fungal origin. Chemically or genetically modified mutants are included.
- Examples of useful lipases include a Humicola lanuginosa lipase, e.g., as described in EP 258 068 and EP 305 216, a Rhizomucor miehei lipase, e.g., as described in EP 238 023, a Candida lipase, such as a C. antarctica lipase, e.g., the C. antarctica lipase A or B described in EP: 214 761, a Pseudomonas lipase such as a P. alcaligenes and P. pseudoalcaligenes lipase, e.g., as described in EP 218 272, a P.
- a Humicola lanuginosa lipase e.g., as described in EP 258 068 and EP 305 216
- a Rhizomucor miehei lipase e.g., as described in EP 238 023
- cepacia lipase e.g., as described in EP 331 376, a P. stutzeri lipase, e.g., as disclosed in GB 1,372,034, a P. fluorescens lipase, a Bacillus lipase, e.g., a B. subtilis lipase (Dartois et al., (1993), Biochemica et Biophysica acta 1131, 253-260), a B. stearothermophilus lipase (JP 64/744992) and a B. pumilus lipase (WO 91/16422).
- cloned lipases may be useful, including the Penicillium camembertii lipase described by Yamaguchi et al., (1991), Gene 103, 61-67), the Geotricum candidum lipase (Schimada, Y. et al., (1989), J. Biochem., 106, 383-388), and various Rhizopus lipases such as a R. delemar lipase (Hass, M. J. et al., (1991), Gene 109, 117-113), a R. niveus lipase (Kugimiya et al., (1992), Biosci. Biotech. Biochem. 56, 716-719) and a R. oryzae lipase.
- R. delemar lipase Hass, M. J. et al., (1991), Gene 109, 117-113
- R. niveus lipase Kugimi
- cutinases Other types of lipolytic enzymes such as cutinases may also be useful, e.g., a cutinase derived from Pseudomonas mendocina as described in WO 88/09367, or a cutinase derived from Fusarium solani pisi (e.g. described in WO 90/09446).
- lipases such as M1 LipaseTM, Luma fastTM and LipomaxTM (Genencor), LipolaseTM and Lipolase UltraTM (Novo Nordisk A/S), and Lipase P “Amano” (Amano Pharmaceutical Co. Ltd.).
- the lipases are normally incorporated in the detergent composition at a level of from 0.00001% to 2% of enzyme protein by weight of the composition, preferably at a level of from 0.0001% to 1% of enzyme protein by weight of the composition, more preferably at a level of from 0.001% to 0.5% of enzyme protein by weight of the composition, even more preferably at a level of from 0.01% to 0.2% of enzyme protein by weight of the composition.
- Amylases Any amylase (a and/or b) suitable for use in alkaline solutions can be used. Suitable amylases include those of bacterial or fungal origin. Chemically or genetically modified mutants are included. Amylases include, for example, a-amylases obtained from a special strain of B. licheniformis, described in more detail in GB 1,296,839. Commercially available amylases are DuramylTM, TermamylTM, FungamylTM and BANTM (available from Novo Nordisk A/S) and RapidaseTM and Maxamyl PTM (available from Genencor).
- the amylases are normally incorporated in the detergent composition at a level of from 0.00001% to 2% of enzyme protein by weight of the composition, preferably at a level of from 0.0001% to 1% of enzyme protein by weight of the composition, more preferably at a level of from 0.001% to 0.5% of enzyme protein by weight of the composition, even more preferably at a level of from 0.01% to 0.2% of enzyme protein by weight of the composition.
- Cellulases Any cellulase suitable for use in alkaline solutions can be used. Suitable cellulases include those of bacterial or fungal origin. Chemically or genetically modified mutants are included. Suitable cellulases are disclosed in U.S. Pat. No. 4,435,307, which discloses fungal cellulases produced from Humicola insolens. Especially suitable cellulases are the 15 cellulases having color care benefits. Examples of such cellulases are cellulases described in European patent application No. 0 495 257 and the endoglucanase of the present invention.
- CelluzymeTM produced by a strain of Humicola insolens , (Novo Nordisk A/S), and KAC-500(B)TM (Kao Corporation).
- Cellulases are normally incorporated in the detergent composition at a level of from 0.00001% to 2% of enzyme protein by weight of the composition, preferably at a level of from 0.0001% to 1% of enzyme protein by weight of the composition, more preferably at a level of from 0.001% to 0.5% of enzyme protein by weight of the composition, even more preferably at a level of from 0.01% to 0.2% of enzyme protein by weight of the composition.
- Peroxidases/Oxidases Peroxidase enzymes are used in combination with hydrogen peroxide or a source thereof (e.g. a percarbonate, perborate or persulfate). Oxidase enzymes are used in combination with oxygen. Both types of enzymes are used for “solution bleaching”, i.e. to prevent transfer of a textile dye from a dyed fabric to another fabric when said fabrics are washed together in a wash liquor, preferably together with an enhancing agent as described in e.g. WO 94/12621 and WO 95/01426. Suitable peroxidases/oxidases include those of plant, bacterial or fungal origin. Chemically or genetically modified mutants are included.
- Peroxidase and/or oxidase enzymes are normally incorporated in the detergent composition at a level of from 0.00001% to 2% of enzyme protein by weight of the composition, preferably at a level of from 0.0001% to 1% of enzyme protein by weight of the composition, more preferably at a level of from 0.001% to 0.5% of enzyme protein by weight of the composition, even more preferably at a level of from 0.01% to 0.2% of enzyme protein by weight of the composition.
- Mixtures of the above mentioned enzymes are encompassed herein, in particular a mixture of a protease, an amylase, a lipase and/or a cellulase.
- the enzyme of the invention is normally incorporated in the detergent composition at a level from 0.00001% to 2% of enzyme protein by weight of the composition, preferably at a level from 0.0001% to 1% of enzyme protein by weight of the composition, more preferably at a level from 0.001% to 0.5% of enzyme protein by weight of the composition, even more preferably at a level from 0.01% to 0.2% of enzyme protein by weight of the composition.
- Additional optional detergent ingredients that can be included in the detergent compositions of the present invention include bleaching agents such as PB1, PB4 and percarbonate with a particle size of 400-800 microns.
- bleaching agent components can include one or more oxygen bleaching agents and, depending upon the bleaching agent chosen, one or more bleach activators. When present oxygen bleaching compounds will typically be present at levels of from about 1% to about 25%. In general, bleaching compounds are optional added components in non-liquid formulations, e.g. granular detergents.
- the bleaching agent component for use herein can be any of the bleaching agents useful for detergent compositions including oxygen bleaches as well as others known in the art.
- the bleaching agent suitable for the present invention can be an activated or non-activated bleaching agent.
- One category of oxygen bleaching agent that can be used encompasses percarboxylic acid bleaching agents and salts thereof. Suitable examples of this class of agents include magnesium monoperoxyphthalate hexahydrate, the magnesium salt of meta-chloro perbenzoic acid, 4-nonylamino-4-oxoperoxybutyric acid and diperoxydodecanedioic acid.
- Such bleaching agents are disclosed in U.S. Pat. No. 4,483,781, U.S. Pat. No. 740,446, EP 0 133 354 and U.S. Pat. No. 4,412,934.
- Highly preferred bleaching agents also include 6-nonylamino-6-oxoperoxycaproic acid as described in U.S. Pat. No. 4,634,551.
- bleaching agents that can be used encompasses the halogen bleaching agents.
- hypohalite bleaching agents include trichloro isocyanuric acid and the sodium and potassium dichloroisocyanurates and N-chloro and N-bromo alkane sulphonamides. Such materials are normally added at 0.5-10% by weight of the finished product, preferably 1-5% by weight.
- the hydrogen peroxide releasing agents can be used in combination with bleach activators such as tetra-acetylethylenediamine (TAED), nonanoyloxybenzenesulfonate (NOBS, described in U.S. Pat. No. 4,412,934), 3,5-trimethyl-hexsanoloxybenzenesulfonate (ISONOBS, described in EP 120 591) or pentaacetylglucose (PAG), which are perhydrolyzed to form a peracid as the active bleaching species, leading to improved bleaching effect.
- bleach activators such as tetra-acetylethylenediamine (TAED), nonanoyloxybenzenesulfonate (NOBS, described in U.S. Pat. No. 4,412,934), 3,5-trimethyl-hexsanoloxybenzenesulfonate (ISONOBS, described in EP 120 591) or pentaacetylglucose (PA
- bleach activators C8(6-octanamido-caproyl) oxybenzene-sulfonate, C9(6-nonanamido caproyl) oxybenzenesulfonate and C10 (6-decanamido caproyl) oxybenzenesulfonate or mixtures thereof.
- acylated citrate esters such as disclosed in European Patent Application No. 91870207.7.
- bleaching agents including peroxyacids and bleaching systems comprising bleach activators and peroxygen bleaching compounds for use in cleaning compositions according to the invention are described in application U.S. Ser. No. 08/136,626.
- the hydrogen peroxide may also be present by adding an enzymatic system (i.e. an enzyme and a substrate therefore) which is capable of generation of hydrogen peroxide at the beginning or during the washing and/or rinsing process.
- an enzymatic system i.e. an enzyme and a substrate therefore
- Such enzymatic systems are disclosed in European Patent Application EP 0 537 381.
- Bleaching agents other than oxygen bleaching agents are also known in the art and can be utilized herein.
- One type of non-oxygen bleaching agent of particular interest includes photoactivated bleaching agents such as the sulfonated zinc and/or aluminium phthalocyanines. These materials can be deposited upon the substrate during the washing process. Upon irradiation with light, in the presence of oxygen, such as by hanging clothes out to dry in the daylight, the sulfonated zinc phthalocyanine is activated and, consequently, the substrate is bleached.
- Preferred zinc phthalocyanine and a photoactivated bleaching process are described in U.S. Pat. No. 4,033,718.
- detergent composition will contain about 0.025% to about 1.25%, by weight, of sulfonated zinc phthalocyanine.
- Bleaching agents may also comprise a manganese catalyst.
- the manganese catalyst may, e.g., be one of the compounds described in “Efficient manganese catalysts for low-temperature bleaching”, Nature 369, 1994, pp. 637-639.
- a suds suppressor exemplified by silicones, and silica-silicone mixtures.
- Silicones can generally be represented by alkylated polysiloxane materials, while silica is normally used in finely divided forms exemplified by silica aerogels and xerogels and hydrophobic silicas of various types. Theses materials can be incorporated as particulates, in which the suds suppressor is advantageously releasably incorporated in a water-soluble or water-dispersible, substantially non surface-active detergent impermeable carrier. Alternatively the suds suppressor can be dissolved or dispersed in a liquid carrier and applied by spraying on to one or more of the other components.
- a preferred silicone suds controlling agent is disclosed in U.S. Pat. No. 3,933,672.
- Other particularly useful suds suppressors are the self-emulsifying silicone suds suppressors, described in German Patent Application DTOS 2,646,126.
- An example of such a compound is DC-544, commercially available form Dow Corning, which is a siloxane-glycol copolymer.
- Especially preferred suds controlling agent are the suds suppressor system comprising a mixture of silicone oils and 2-alkyl-alkanols. Suitable 2-alkyl-alkanols are 2-butyl-octanol which are commercially available under the trade name Isofol 12 R.
- compositions can comprise a silicone/silica mixture in combination with fumed nonporous silica such as AerosilR.
- the suds suppressors described above are normally employed at levels of from 0.001% to 2% by weight of the composition, preferably from 0.01% to 1% by weight.
- compositions may be employed such as soil-suspending agents, soil-releasing agents, optical brighteners, abrasives, bactericides, tarnish inhibitors, coloring agents, and/or encapsulated or nonencapsulated perfumes.
- encapsulating materials are water soluble capsules which consist of a matrix of polysaccharide and polyhydroxy compounds such as described in GB 1,464,616.
- Suitable water soluble encapsulating materials comprise dextrins derived from ungelatinized starch acid esters of substituted dicarboxylic acids such as described in U.S. Pat. No. 3,455,838. These acid-ester dextrins are, preferably, prepared from such starches as waxy maize, waxy sorghum, sago, tapioca and potato. Suitable examples of said encapsulation materials include N-Lok manufactured by National Starch. The N-Lok encapsulating material consists of a modified maize starch and glucose. The starch is modified by adding monofunctional substituted groups such as octenyl succinic acid anhydride.
- Antiredeposition and soil suspension agents suitable herein include cellulose derivatives such as methylcellulose, carboxymethylcellulose and hydroxyethylcellulose, and homo- or co-polymeric polycarboxylic acids or their salts.
- Polymers of this type include the polyacrylates and maleic anhydride-acrylic acid copolymers previously mentioned as builders, as well as copolymers of maleic anhydride with ethylene, methylvinyl ether or methacrylic acid, the maleic anhydride constituting at least 20 mole percent of the copolymer. These materials are normally used at levels of from 0.5% to 10% by weight, more preferably form 0.75% to 8%, most preferably from 1% to 6% by weight of the composition.
- Preferred optical brighteners are anionic in character, examples of which are disodium 4,4′-bis-(2-diethanolamino-4-anilino -s- triazin-6-ylamino)stilbene-2:2′-disulphonate, disodium 4, -4′-bis-(2-morpholino-4-anilino-s-triazin-6-ylamino-stilbene-2:2′-disulphonate, disodium 4,4′bis-(2,4-dianilino-s-triazin-6-ylamino)stilbene-2:2′-disulphonate, monosodium 4′,4′′bis-(2,4-dianilino-s-tri-azin-6 ylamino)stilbene-2-sulphonate, disodium 4,4′-bis-(2-anillino-4-(N-methyl-N-2-hydroxethylamino)-s-triazin-6-ylamino) stilbene-2,2′
- polyethylene glycols particularly those of molecular weight 1000-10000, more particularly 2000 to 8000 and most preferably about 4000. These are used at levels of from 0.20% to 5% more preferably from 0.25% to 2.5% by weight. These polymers and the previously mentioned homo- or co-polymeric poly-carboxylate salts are valuable for improving whiteness maintenance, fabric ash deposition, and cleaning performance on clay, proteinaceous and oxidizable soils in the presence of transition metal impurities.
- Soil release agents useful in compositions of the resent invention are conventionally copolymers or terpolymers f terephthalic acid with ethylene glycol and/or propylene lycol units in various arrangements. Examples of such polymers are disclosed in U.S. Pat. Nos. 4,116,885 and 4,711,730 and EP 0 272 033. A particular preferred polymer in accordance with EP 0 272 033 has the formula:
- PEG is —(OC2H4)O—
- PO is (OC3H6O)
- T is (pOOC6H4CO).
- polyesters as random copolymers of dimethyl terephthalate, dimethyl sulfoisophthalate, ethylene glycol and 1,2-propanediol, the end groups consisting primarily of sulphobenzoate and secondarily of mono esters of ethylene glycol and/or 1,2-propanediol.
- the target is to obtain a polymer capped at both end by sulphobenzoate groups, “primarily”, in the present context most of said copolymers herein will be endcapped by sulphobenzoate groups.
- some copolymers will be less than fully capped, and therefore their end groups may consist of monoester of ethylene glycol and/or 1,2-propanediol, thereof consist “secondarily” of such species.
- the selected polyesters herein contain about 46% by weight of dimethyl terephthalic acid, about 16% by weight of 1,2-propanediol, about 10% by weight ethylene glycol, about 13% by weight of dimethyl sulfobenzoic acid and about 15% by weight of sulfoisophthalic acid, and have a molecular weight of about 3.000.
- the polyesters and their method of preparation are described in detail in EP 311 342.
- Fabric softening agents can also be incorporated into laundry detergent compositions in accordance with the present invention. These agents may be inorganic or organic in type. Inorganic softening agents are exemplified by the smectite clays disclosed in GB-A-1 400898 and in U.S. Pat. No. 5,019,292. Organic fabric softening agents include the water insoluble tertiary amines as disclosed in GB-A1 514 276 and EP 0 011 340 and their combination with mono C12-C14 quaternary ammonium salts are disclosed in E ⁇ -B-0 026 528 and di-long-chain amides as disclosed in EP 0 242 919. Other useful organic ingredients of fabric softening systems include high molecular weight polyethylene oxide materials as disclosed in EP 0 299 575 and 0 313 146.
- Levels of smectite clay are normally in the range from 5% to 15%, more preferably from 8% to 12% by weight, with the material being added as a dry mixed component to the remainder of the formulation.
- Organic fabric softening agents such as the water-insoluble tertiary amines or dilong chain amide materials are incorporated at levels of from 0.5% to 5% by weight, normally from 1% to 3% by weight whilst the high molecular weight polyethylene oxide materials and the water soluble cationic materials are added at levels of from 0.1% to 2%, normally from 0.15% to 1.5% by weight.
- These materials are normally added to the spray dried portion of the composition, although in some instances it may be more convenient to add them as a dry mixed particulate, or spray them as molten liquid on to other solid components of the composition.
- the detergent compositions according to the present invention may also comprise from 0.001% to 10%, preferably from 0.01% to 2%, more preferably form 0.05% to 1% by weight of polymeric dye- transfer inhibiting agents.
- Said polymeric dye-transfer inhibiting agents are normally incorporated into detergent compositions in order to inhibit the transfer of dyes from colored fabrics onto fabrics washed therewith. These polymers have the ability of complexing or adsorbing the fugitive dyes washed out of dyed fabrics before the dyes have the opportunity to become attached to other articles in the wash.
- Suitable polymeric dye-transfer inhibiting agents are polyamine N-oxide polymers, copolymers of N-vinyl-pyrrolidone and N-vinylimidazole, polyvinylpyrrolidone polymers, polyvinyloxazolidones and polyvinylimidazoles or mixtures thereof.
- the detergent composition according to the invention can be in liquid, paste, gels, bars or granular forms.
- Non-dusting granulates may be produced, e.g., as disclosed in U.S. Pat. Nos. 4,106,991 and 4,661,452 (both to Novo Industri A/S) and may optionally be coated by methods known in the art.
- waxy coating materials are poly(ethylene oxide) products (polyethyleneglycol, PEG) with mean molecular weights of 1000 to 20000; ethoxylated nonylphenols having from 16 to 50 ethylene oxide units; ethoxylated fatty alcohols in which the alcohol contains from 12 to 20 carbon atoms and in which there are 15 to 80 ethylene oxide units; fatty alcohols; fatty acids; and mono- and di- and triglycerides of fatty acids.
- film-forming coating materials suitable for application by fluid bed techniques are given in GB 1483591.
- Granular compositions according to the present invention can also be in “compact form”, i.e. they may have a relatively higher density than conventional granular detergents, i.e. form 550 to 950 g/l; in such case, the granular detergent compositions according to the present invention will contain a lower amount of “Inorganic filler salt”, compared to conventional granular detergents; typical filler salts are alkaline earth metal salts of sulphates and chlorides, typically sodium sulphate; “Compact” detergent typically comprise not more than 10% filler salt.
- liquid compositions according to the present invention can also be in “concentrated form”, in such case, the liquid detergent compositions according to the present invention will contain a lower amount of water, compared to conventional liquid detergents.
- the water content of the concentrated liquid detergent is less than 30%, more preferably less than 20%, most preferably less than 10% by weight of the detergent compositions.
- compositions of the invention may for example, be formulated as hand and machine laundry detergent compositions including laundry additive compositions and compositions suitable for use in the pretreatment of stained fabrics, rinse added fabric softener compositions, and compositions for use in general household hard surface cleaning operations and dishwashing operations.
- compositions for the present invention are not necessarily meant to limit or otherwise define the scope of the invention.
- LAS Sodium linear C12 alkyl benzene sulphonate
- TAS Sodium tallow alkyl sulphate
- 25EY A C12-C15 predominantly linear primary alcohol condensed with an average of Y moles of ethylene oxide
- 45EY A C14-C15 predominantly linear primary alcohol condensed with an average of Y moles of ethylene oxide
- XYEZS C1X-C1Y sodium alkyl sulfate condensed with an average of Z moles of ethylene oxide per mole
- Nonionic C13-C15 mixed ethoxylated/propoxylated fatty alcohol with an average degree of ethoxylation of 3.8 and an average degree of propoxylation of 4.5 sold under the tradename Plurafax LF404 by BASF Gmbh
- CFAA C12-C14 alkyl N-methyl glucamide
- TFAA C16-C18 alkyl N-methyl glucamide
- NaSKS-6 Crystalline layered silicate of formula d-Na2Si2O5
- MA/AA Copolymer of 1:4 maleic/acrylic acid, average molecular weight about 80,000
- Polyacrylate Polyacrylate homopolymer with an average molecular weight of 8,000 sold under the tradename PA30 by BASF Gmbh
- Zeolite A Hydrated Sodium Aluminosilicate of formula Na12(AlO2SiO2)12. 27H2O having a primary particle size in the range from 1 to 10 micrometers
- Perborate Anhydrous sodium perborate monohydrate bleach, empirical formula NaBO2.H2O2
- PB4 Anhydrous sodium perborate tetrahydrate
- Percarbonate Anhydrous sodium percarbonate bleach of empirical formula 2Na2CO3.3H2O2
- TAED Tetraacetyl ethylene diamine
- CMC Sodium carboxymethyl cellulose
- DETPMP Diethylene triamine penta (methylene phosphonic acid), marketed by Monsanto under the Tradename Dequest 2060
- EDDS Ethylenediamine-N, N′-disuccinic acid, [S,S] isomer in the form of the sodium salt
- Granular Suds suppressor 12% Silicone/silica, 18% stearyl alcohol, 70% starch in granular form
- HMWPEO High molecular weight polyethylene oxide
- TAE 25 Tallow alcohol ethoxylate (25)
- a granular fabric cleaning composition in accordance with the invention may be prepared as follows: Sodium linear C12 alkyl 6.5 benzene sulfonate Sodium sulfate 15.0 Zeolite A 26.0 Sodium nitrilotriacetate 5.0 Enzyme of the invention 0.1 PVP 0.5 TAED 3.0 Boric acid 4.0 Perborate 18.0 Phenol sulphonate 0.1 Minors Up to 100
- a compact granular fabric cleaning composition in accord with the invention may be prepared as follows: follows: 45AS 8.0 25E3S 2.0 25E5 3.0 25E3 3.0 TFAA 2.5 Zeolite A 17.0 NaSKS-6 12.0 Citric acid 3.0 Carbonate 7.0 MA/AA 5.0 CMC 0.4 Enzyme of the invention 0.1 TAED 6.0 Percarbonate 22.0 EDDS 0.3 Granular suds suppressor 3.5 water/minors Up to 100%
- Granular fabric cleaning compositions in accordance with the invention which are especially useful in the laundering of coloured fabrics were prepared as follows: LAS 10.7 — TAS 2.4 — TFAA — 4.0 45AS 3.1 10.0 45E7 4.0 — 25E3S — 3.0 68E11 1.8 — 25E5 — 8.0 Citrate 15.0 7.0 Carbonate — 10 Citric acid 2.5 3.0 Zeolite A 32.1 25.0 Na-SKS-6 — 9.0 MA/AA 5.0 5.0 DETPMP 0.2 0.8 Enzyme of the invention 0.10 0.05 Silicate 2.5 — Sulphate 5.2 3.0 PVP 0.5 — Poly (4-vinylpyridine)-N- — 0.2 Oxide/copolymer of vinyl- imidazole and vinyl- pyrrolidone Perborate 1.0 — Phenol sulfonate 0.2 — Water/Minors Up to 100%
- Granular fabric cleaning compositions in accordance with the invention which provide “Softening through the wash” capability may be prepared as follows: 45AS — 10.0 LAS 7.6 — 68AS 1.3 — 45E7 4.0 — 25E3 — 5.0 Coco-alkyl-dimethyl hydroxy- 1.4 1.0 ethyl ammonium chloride Citrate 5.0 3.0 Na-SKS-G — 11.0 Zeolite A 15.0 15.0 MA/AA 4.0 4.0 DETPMP 0.4 0.4 Perborate 15.0 — Percarbonate — 15.0 TAED 5.0 5.0 Smectite clay 10.0 10.0 HMWPEO — 0.1 Enzyme of the invention 0.10 0.05 Silicate 3.0 5.0 Carbonate 10.0 10.0 Granular suds suppressor 1.0 4.0 CMC 0.2 0.1 Water/Minors Up to 100%
- Heavy duty liquid fabric cleaning compositions in accordance with the invention may be prepared as follows: I II LAS acid form — 25.0 Citric acid 5.0 2.0 25AS acid form 8.0 — 25AE2S acid form 3.0 — 25AE7 8.0 — CFAA 5 — DETPMP 1.0 1.0 Fatty acid 8 — Oleic acid — 1.0 Ethanol 4.0 5.0 Propanediol 2.0 6.0 Enzyme of the invention 0.10 0.05 Coco-alkyl dimethyl — 3.0 hydroxy ethyl ammonium chloride Smectite clay — 5.0 PVP 2.0 — Water/Minors Up to 100%
- the present: invention relates to use of the endoglucanase of the invention in the bio-polishing process.
- Bio-Polishing is a specific treatment of the yarn surface which improves fabric quality with respect to handle and appearance without loss of fabric wettability. The most important effects of Bio-Polishing can be characterized by less fuzz and pilling, increased gloss/luster, improved fabric handle, increased durable softness and altered water absorbency.
- Bio-Polishing usually takes place in the wet processing of the manufacture of knitted and woven fabrics. Wet processing comprises such steps as e.g. desizing, scouring, bleaching, washing, dying/printing and finishing. During each of these steps, the fabric is more or less subjected to mechanical action.
- Desizing is the act of removing size from textiles.
- warp yarns Prior to weaving on mechanical looms, warp yarns are often coated with size starch or starch derivatives in order to increase their tensile strength. After weaving, the size coating must be removed before further processing the fabric in order to ensure Ea homogeneous and wash-proof result. It is known that in order to achieve the effects of Bio-Polishing, a combination of cellulytic and mechanical action is required. It is also known that “super-softness” is achievable when the treatment with a cellulase is combined with a conventional treatment with softening agents.
- Bio-polishing may be obtained by applying the method described e.g. in WO 93/20278.
- the endoglucanase of the present invention may be applied advantageously e.g. as follows:
- pretreatment with the endoglucanase may degrade the cambium layer prior to debarking in mechanical drums resulting in advantageous energy savings.
- fibre modification i.e. improvement of fibre properties where partial hydrolysis across the fibre wall is needed which requires deeper penetrating enzymes (e.g. in order to make coarse fibers more flexible). Deep treatment of fibers has so far not been possible for high yield pulps e.g. mechanical pulps or mixtures of recycled pulps. This has been ascribed to the nature of the fibre wall structure that prevents the passage of enzyme molecules due to physical restriction of the pore matrix of the fibre wall. It is contemplated that the present endoglucanase is capable of penetrating into the fibre wall.
- the drainability of papermaking pulps may be improved by treatment of the pulp with hydrolysing enzymes, e.g. cellulases.
- hydrolysing enzymes e.g. cellulases.
- Use of the present endoglucanase may be more effective, e.g. result in a higher degree of loosening bundles of strongly hydrated micro-fibrils in the fines fraction (consisting of fibre debris) that limits the rate of drainage by blocking hollow spaces between fibers and in the wire mesh of the paper machine.
- CSF Canadian standard freeness
- increases and the Schopper-Riegler drainage index decreases when pulp in subjected to cellulase treatment see e.g. U.S. Pat. No. 4,923,565; TAPPI T227, SCAN C19:65.ence.
- Partial hydrolysis of recycled paper during or upon pulping by use of hydrolysing enzymes such as cellulases are known to facilitate the removal and agglomeration of ink particles.
- Use of the present endoglucanse may give a more effective loosening of ink from the surface structure due to a better penetration of the enzyme molecules into the fibrillar matrix of the fibre wall, thus softening the surface whereby ink particles are effectively loosened.
- the agglomeration of loosened ink particles are also improved, due to a more efficient hydrolysis of cellulosic fragments found attached to ink particles originating from the fibres.
- the treatment of lignocellulosic pulp may, e.g., be performed as described in WO 91/14819, WO 91/14822, WO 92/17573 and WO 92/18688.
- the present invention relates to use of the endoglucanase and/or enzyme preparation according to the invention for degradation of plant material e.g. cell walls.
- novel endoglucanase and/or enzyme preparation of the invention is useful in the preparation of wine, fruit or vegetable juice in order to increase yield.
- Endoglucanases according to the invention may also be applied for enzymatic hydrolysis of various plant cell-wall derived materials or waste materials, e.g. agricultural residues such as wheat-straw, corn cobs, whole corn plants, nut shells, grass, vegetable hulls, bean hulls, spent grains, sugar beet pulp, and the like.
- the plant material may be degraded in order to improve different kinds of processing, facilitate purification or extraction of other components like purification of beta-glucan or beta-glucan oligomers from cereals, improve the feed value, decrease the water binding capacity, improve the degradability in waste water plants, improve the conversion of e.g. grass and corn to ensilage, etc.
- the cellulase variants of the invention show improved performance. Some of the variants may show improved performance with respect to increased catalytic activity.
- cellulase activity can be expressed in S-CEVU.
- Cellulolytic enzymes hydrolyse CMC, thereby increasing the viscosity of the incubation mixture.
- the resulting reduction in viscosity may be determined by a vibration viscosimeter (e.g. MIVI 3000 from Sofraser, France).
- Determination of the cellulolytic activity, measured in terms of S-CEVU may be determined according to the following analysis method (assay):
- the S-CEVU assay quantifies the amount of catalytic activity present in the sample by measuring the ability of the sample to reduce the viscosity of a solution of carboxy-methylcellulose (CMC).
- the assay is carried out at 40° C.; pH 7.5; 0.1M phosphate buffer; time 30 min; using a relative enzyme standard for reducing the viscosity of the CMC(carboxymethylcellulose Hercules 7 LFD) substrate; enzyme concentration approx. 0.15 S-CEVU/ml.
- the arch standard is defined to 8200 S-CEVU/g.
- position 119 was identified as a particular point of interest for making cellulase variants.
- Position 119 (cellulase numbering) is located within 3 ⁇ from the substrate.
- H histidine residue
- Q glutamine residue
- All Humicola insolens variants are, unless otherwise stated, constructed by application of the ChameleonTM Double-stranded, site-directed Mutagenesis kit, from Stratagene.
- the following synthetic oligo-nucleotide were used as selection primer: S/M GAATGACTTGGTTGACGCGTCACCAGTCAC, or M/S GAATGACTTGGTTGAGTACTCACCAGTCAC.
- S/M replaces the ScaI site in the beta-lactamase gene of the plasmid with a M1uI site and M/S does the reverse. The later is used to introduce secondary mutations in variants generated by the first selection primer.
- Thielavia terrestis cellulase variants For construction of Thielavia terrestis cellulase variants, the Thielavia terrestis EG V cellulase cDNA obtainable from the plasmid deposited as DSM 10811 was used. DSM 10811 was deposited at the Deutsche Sammlung von Mikroorganismen und Zellkulturen on Jun. 30, 1995 according to the Budapest Treaty. The plasmid was digested with the restriction endonucleases BamHI and NotI The 4153 bp vector part and the 1211 bp BamHI-NotI fragment were isolated. Equal portions of the 1211 bp fragment were digested with respectively HgiAI and EcoRV and the 487 bp BamHI-HgiAI and 690 bp EcoRV-NotI fragments were isolated.
- the ligation mixture was transformed into E. coli strain XL1, and from the resulting transformants Thielavia terrestris /Q119H was isolated and verified by DNA sequencing.
- the cellulases with a cellulose binding domain CBD were purified by exploiting their binding to Avicel.
- the cloned product was recovered after fermentation by separation of the extracellular fluid from the production organism.
- the cellulase was then highly purified by affinity chromatography using 150 gram of Avicel in a slurry with 20 mM sodiumphosphate pH 7.5.
- the Avicel slurry was mixed with the crude fermentation broth which in total contains about 1 gram of protein. After mixing at 4° C. for 20 min, the Avicel-bound enzyme is packed into a column with a dimension of 50 times 200 mm about 400 ml total.
- Cellulases which natural lack CBD or the linker has been proteolytic cleaved or in which the CBD has been removed by introducing a stop codon after the catalytic domain can not be purified using Avicel.
- the extracellular proteins are recovered free from the production organism.
- the core cellulases were purified free of Aspergillus proteins by cation exchange chromatography.
- the fermentation broth was adjusted to pH 3.5 and filtered to remove the precipitating proteins. Then the proteins were ultra filtrated (concentrated and washed with water) on a DOW GR81PP membrane with a cut off 6 KD until the conductivity of the eluate is below 1000 mS/cm.
- the sample was finally applied to a S-Sepharose column equilibrated with a 20 mM citrate buffer pH 3.5 .
- the enzyme will bind to the S-Sepharose at this low pH and it is eluted as a single peak using a NaCl gradient from 0 to 500 mM.
- the eluted pure enzyme was concentrated on a Amicon cell with the DOW GR81PP membrane. All purified cellulases gave a single band in SDS-PAGE.
- the Thielavia terrestris /Q119D was constructed as described in example 1 but using the following construction:
- the CT1 encoding DNA was furnished with a C-terminal Xba1 site and subcloned into the pCaHj418 vector as described below.
- PCT1 was used as template in a Pwo polymerase PCR, 94 C2′ ⁇ 3x(94 C,30′′-72 C,1′)-25x(94 C,30′′-55 C, 30′′-72, C 1′) ⁇ 72 C,5′ applying the two primers 8939: CGACTTCAATGTCCAGTCGG 25335: GCGCTCTAGAGGATTAAAGGCACTGC
- the resulting 718 bp PCR product was digested with Sal1 and Xba1 and the 165 bp fragment was isolated. This fragment was ligated together with the 833 bp BamH1-Sal1 fragment from pCT1-2 into the 4.1 kb Xba1-BamH1 vector fragment of pCaHj418.
- PCT2 was constructed by the ChameleonTM Double-stranded, site-directed Mutagenesis kit (from Stratagene) as described above with pCT1418 as template, the S/M primer as selection primer and the following mutagenic primer: 109330: CGACCTGGGATCGAACGACTTCGATATCGCCATGC
- a successfully mutated plasmid pCT2 was isolated, verified by DNA sequencing and transformed into Aspergillus oryzae strain JaL228.
- Thielavia terrestris cellulase and the Thielavia terrestris /Q119D variant was tested for activity towards PASC as described in example 9 at pH 7.0 and pH 10.0.
- the plasmid pCT3 embodies DNA encoding the Thielavia terrestris endoglucanase core enzyme and followed by the linker CBD of Humicola grisea.
- pCT3 was constructed by means of sequence overlap extension PCR, applying PWO polymerase.
- pCT1418 (disclosed in example 2) a 876 bp PCR fragment was generated by the following primers: 101621: GGATGCCATGCTTGGAGGATAGCAACC 107823: GGGGGCGTGAAGACGGGAAGCTGGAGTCG
- the isolated PCR fragments were applied as template in an assembly PCR reaction with primers 101621 and 107819: 94_C, 1′-3x(94_C, 30′′-70_C, 1′-72_C, 2′)-20x(94_C, 30′′-61_C, 30′′-72_C, 1,5′′)-72_C, 7′.
- the resulting 1261 bp PCR product was isolated cut by restriction enzymes BamH1 and Xba1 and the resulting 1172 bp DNA fragment was isolated and ligated into the 4.1 kb vector fragment of BamH1-Xba1 digested pCaHj418.
- the plasmid pPsF45 embodies DNA encoding the Pseudomonas cellolytica endoglucanase core enzyme headed by the H. insolens EGV endoglucanase signal peptide and followed by the linker CBD of same enzyme.
- the selection primer was converting the unike Sca1 site in the lactamase gene of the plasmid to a Mlu1 site:
- Disulfide bridges are known to stabilize protein structures. The removal of disulfide bridges in a cellulase will destabilizes the enzyme (thermostability) while retaining significant activity. This can be useful in applications where a fast inactivation of the enzyme is preferred, e.g. in denim or textile applications or for low temperature processes.
- Humicola insolens EGV cellulase and five variants of Humicola insolens cellulase were constructed mutating either one or both residues involved in a disulfide bridge.
- the specific activity was measured as disclosed under Materials and Methods.
- the melting temperature of the enzymes were measured using Differential Scanning Calometry, DSC. DSC was done at neutral pH (7.0) using a MicroCalc Inc. MC calorimeter with a constant scan rate and raising the temperature from 20° C. to 90° C. at a rate of 90° C. per hour.
- Variants of the present invention may show improved performance with respect to an altered sensitivity towards anionic tensides.
- Anionic tensides are products frequently incorporated into detergent compositions. Unfolding of cellulases tested so far, is accompanied by a decay in the intrinsic fluorescence of the proteins. The intrinsic fluorescence derives from Trp side chains (and to a smaller extent Tyr side chains) and is sensitive to the hydrophobicity of the side chain environment. Unfolding leads to a more hydrophilic environment as the side-chains become more exposed to solvent, and this quenches fluorescence.
- Fluorescence is followed on a Perkin/ElmerTM LS50 luminescence spectrometer.
- the greatest change in fluorescence on unfolding is obtained by excitation at 280 nm and emission at 345 nm.
- Slit widths (which regulate the magnitude of the signal) are usually 5 nm for both emission and excitation at a protein concentration of 5 ⁇ g/ml. Fluorescence is measured in 2-ml quartz cuvettes thermostatted with a circulating water bath and stirred with a small magnet. The magnet-stirrer is built into the spectrometer.
- Unfolding can be followed in real time using the available software. Rapid unfolding (going to completion within less than 5-10 minutes) is monitored in the TimeDrive option, in which the fluorescence is measured every few (2-5) seconds. For slower unfolding, four cuvettes can be measured at a time in the cuvette-holder using the Wavelength Program option, in which the fluorescence of each cuvette is measured every 30 seconds. In all cases, unfolding is initiated by adding a small volume (typically 50 ⁇ l) of concentrated enzyme solution to the thermostatted cuvette solution where mixing is complete within a few seconds due to the rapid rotation of the magnet.
- a small volume typically 50 ⁇ l
- the protein concentration is 5-10 ⁇ g/ml (the protein concentration is not crucial, as LAS is in excess).
- the unfolding of Humicola insolens cellulase can be compared with other enzymes (Table 1). This enables us to draw up the following ranking order for stability against anionic tenside:
- t1 ⁇ 2 pH 10 s
- t1 ⁇ 2 pH 7 s
- Cellulase 1000 ppm LAS, 40° C.
- Humicola insolens 48 28 Humicola insolens/ 63 9a H119Q
- Positions already containing one of these residues are the primary target for mutagenesis
- secondary targets are positions which has one of these residues on an equivalent position in another cellulase
- third target are any surface exposed residue.
- the reaction medium contained 5.0 g/l of a commercial regular powder detergent from the detergent manufacturer NOPA Denmark.
- the detergent was formulated without surfactants for this experiment and pH adjusted to pH 7.0.
- the reaction medium included 0.5 g/l PASC and was with or without 1 g/l LAS (linear alkylbenzenesulphonate), which is an anionic surfactant, and the reaction proceeded at the temperature 30° C. for 30 minutes.
- Cellulase was dosed at 0.20 S-CEVU/l. After the 30 minutes of incubation the reaction was stopped with 2 N NaOH and the amount of reducing sugar ends determined through reduction of p-hydroxybenzoic acid hydrazide. The decrease in absorption of reduced p-hydroxybenzoic acid hydrazide relates to the cellulase activity.
- the pH activity profile of a cellulase is governed by the pH dependent behavior of specific titratable groups, typically the acidic residues in the active site.
- the pH profile can be altered by changing the electrostatic environment of these residues, either by substitution of residues involving charged or potentially charged groups such as Arg (R), Lys (K), Tyr (Y), His (H), Glu (E), Asp (D) or Cys (C) if not involved in a disulphide bridge or by changes in the surface accessibility of these specific titratable groups by mutations in the biding cleft within 5 ⁇ of the substrate.
- Humicola insolens cellulase and variants of Humicola insolens cellulase involving substitution of charged or potentially charged residues have been tested for activity towards PASC at pH 7 and pH 10, respectively.
- the method is enzymatic degradation of carboxy-methyl-cellulose, at different pH's. Buffers are prepared in the range 4.0 to 10.5 with intervals of 0.5 pH unit. The analyze is based on formation of new reducing ends in carboxy-methyl-cellulose, these are visualized by reaction with PHBAH in strong alkaline environment, were they forms a yellow compound with absorption maximum at 410 nm.
- Buffer preparation 0.2 mol of each buffer substance is weighed out and dissolved in 1 liter of Milli Q water. 250 ml 0.2M buffer solution and 200 ml Milli Q water is mixed. The pH are measured using Radiometer PHM92 labmeter calibrated using standard buffer solutions from Radiometer. The pH of the buffers are adjusted to actual pH using 4M NaOH or 4M HCl and adjusted to total 500 ml with water. When adjusting Na-barbiturate to pH 8.0 there might be some precipitation, this can be re-dissolved by heating to 50° C.
- MES (2[N-Morpholino]ethanesulfonic Acid) from SIGMA cat.no. M-8250, batchno. 68F-5625, pKa 6.09, MW 195.2;
- MOPS (3-[N-Morpholino]propanesulfonic Acid) from SIGMA cat.no. M-1254, batchno. 115F-5629, pKa 7.15, MW 209.3;
- PHBAH p-HYDROXY BENZOIC ACID HYDRAZIDE
- K-Na-tartrate (Potassium sodium tartrate tetrahydrate) from MERCK cat.no. 8087, batch no. A653387 304;
- CMC Carboxy Methyl Cellulose supplied by Hercules (FMC)7LF (December 1989).
- this example demonstrates that the relative activity pH profile can be altered towards acidic or alkaline pH by creation of variants involving potentially charged residues and/or by altering residues in the binding cleft less that 5 ⁇ from the substrate.
- the reaction medium contained phosphate buffer pH 7.0 and varying concentrations of LAS in the range 0.2-1.0 g/L. Two swatches were laundered at 40° C. for 30 minutes, rinsed and then dried. This laundering cycle was repeated four times. All enzymes was tested at each LAS concentration.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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US10/919,195 US20050009166A1 (en) | 1996-09-17 | 2004-08-16 | Cellulase variants |
US11/830,063 US8017372B2 (en) | 1996-09-17 | 2007-07-30 | Cellulase variants |
US12/394,202 US7993898B2 (en) | 1996-09-17 | 2009-02-27 | Cellulase variants |
US13/162,636 US20110250674A1 (en) | 1996-09-17 | 2011-06-17 | Cellulase variants |
US13/471,757 US20120289450A1 (en) | 1996-09-17 | 2012-05-15 | Cellulase Variants |
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DK101396 | 1996-09-17 | ||
DK1013/96 | 1996-09-17 | ||
PCT/DK1997/000393 WO1998012307A1 (en) | 1996-09-17 | 1997-09-17 | Cellulase variants |
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PCT/DK1997/000393 Continuation WO1998012307A1 (en) | 1996-09-17 | 1997-09-17 | Cellulase variants |
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US10/919,195 Continuation US20050009166A1 (en) | 1996-09-17 | 2004-08-16 | Cellulase variants |
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US09/261,329 Abandoned US20030092097A1 (en) | 1996-09-17 | 1999-03-03 | Cellulase variants |
US10/919,195 Abandoned US20050009166A1 (en) | 1996-09-17 | 2004-08-16 | Cellulase variants |
US11/830,063 Expired - Fee Related US8017372B2 (en) | 1996-09-17 | 2007-07-30 | Cellulase variants |
US12/394,202 Expired - Fee Related US7993898B2 (en) | 1996-09-17 | 2009-02-27 | Cellulase variants |
US13/162,636 Abandoned US20110250674A1 (en) | 1996-09-17 | 2011-06-17 | Cellulase variants |
US13/471,757 Abandoned US20120289450A1 (en) | 1996-09-17 | 2012-05-15 | Cellulase Variants |
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US10/919,195 Abandoned US20050009166A1 (en) | 1996-09-17 | 2004-08-16 | Cellulase variants |
US11/830,063 Expired - Fee Related US8017372B2 (en) | 1996-09-17 | 2007-07-30 | Cellulase variants |
US12/394,202 Expired - Fee Related US7993898B2 (en) | 1996-09-17 | 2009-02-27 | Cellulase variants |
US13/162,636 Abandoned US20110250674A1 (en) | 1996-09-17 | 2011-06-17 | Cellulase variants |
US13/471,757 Abandoned US20120289450A1 (en) | 1996-09-17 | 2012-05-15 | Cellulase Variants |
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EP (2) | EP1726644A1 (pt) |
JP (2) | JP3532576B2 (pt) |
CN (2) | CN100362100C (pt) |
AT (1) | ATE324437T1 (pt) |
AU (1) | AU4200797A (pt) |
BR (1) | BR9711479B1 (pt) |
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Also Published As
Publication number | Publication date |
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JP3532576B2 (ja) | 2004-05-31 |
WO1998012307A1 (en) | 1998-03-26 |
EP0937138A1 (en) | 1999-08-25 |
US20080206836A1 (en) | 2008-08-28 |
ATE324437T1 (de) | 2006-05-15 |
CN1230987A (zh) | 1999-10-06 |
CN101085985B (zh) | 2012-05-16 |
US20120289450A1 (en) | 2012-11-15 |
DE69735767D1 (en) | 2006-06-01 |
EP0937138B1 (en) | 2006-04-26 |
CN100362100C (zh) | 2008-01-16 |
CA2265914C (en) | 2011-05-03 |
US8017372B2 (en) | 2011-09-13 |
CN101085985A (zh) | 2007-12-12 |
CA2265914A1 (en) | 1998-03-26 |
EP1726644A1 (en) | 2006-11-29 |
AU4200797A (en) | 1998-04-14 |
US20090170747A1 (en) | 2009-07-02 |
US20050009166A1 (en) | 2005-01-13 |
US20110250674A1 (en) | 2011-10-13 |
DE69735767T2 (de) | 2007-04-05 |
BR9711479B1 (pt) | 2009-08-11 |
JP2004065255A (ja) | 2004-03-04 |
BR9711479A (pt) | 1999-08-24 |
US7993898B2 (en) | 2011-08-09 |
JP2000514311A (ja) | 2000-10-31 |
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