WO2005100561A1 - 翻訳制御ポリヌクレオチド - Google Patents
翻訳制御ポリヌクレオチド Download PDFInfo
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- WO2005100561A1 WO2005100561A1 PCT/JP2005/006970 JP2005006970W WO2005100561A1 WO 2005100561 A1 WO2005100561 A1 WO 2005100561A1 JP 2005006970 W JP2005006970 W JP 2005006970W WO 2005100561 A1 WO2005100561 A1 WO 2005100561A1
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
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- C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
- C12N15/09—Recombinant DNA-technology
- C12N15/63—Introduction of foreign genetic material using vectors; Vectors; Use of hosts therefor; Regulation of expression
- C12N15/67—General methods for enhancing the expression
Definitions
- the present invention relates to a translational control polynucleotide that regulates translational activity depending on temperature, a recombinant vector comprising the polynucleotide, a transformant comprising the recombinant vector, and a method of protein synthesis, It relates to an in vitro translation kit and a protein synthesizer.
- an expression vector containing a base sequence encoding a target protein is introduced into a host cell which is a living cell, and the host cell is transformed.
- Methods for expressing proteins can be mentioned.
- the promoter of a gene containing a base sequence encoding the target protein is improved, and the concentration of the component of the culture medium for culturing the host cell is adjusted.
- Methods such as methods for controlling mRNA transcription activity (see, for example, Patent Document 1) and methods for promoting protein translation using a specific RNA sequence (see, for example, Patent Document 2). It has been
- cell-free protein synthesis has been studied as a method for performing protein synthesis carried out in a host cell in vitro, and improvements for practical use have been made.
- the method for cell-free protein synthesis for example, an extract containing ribosome, tRNA synthetase, translation initiation factor, etc. is prepared from E. coli, wheat germ, etc.
- the above-mentioned cell-free protein synthesis does not require any steps such as transformation of host cells or cell disruption, and it is difficult to synthesize proteins compared to a system using host cells. There are advantages such as few kinds of toxic substances.
- these proteins When synthesizing a target protein of eukaryotic origin, these proteins have activity within the range of general host cell culture temperature, so that the host cells can be expressed by expressing them in the host cell. It is desirable to carry out the synthesis under low temperature conditions, since it may inhibit the growth of the protein, and as a result, a sufficient amount of protein may not be obtained. Also in cell-free protein synthesis, similarly, a target protein having a synthesized activity may adversely affect factors and proteins involved in translation.
- RNAN red 'clover''necrotic' mosaic 'virus
- RCNMV Red Clover Necrotic Mosaic Virus
- RNA virus gene
- the present inventors found that luc mRNA having ⁇ UTR and ⁇ -UTR in RNA1 of the Canadian strain, which can not replicate at 25 ° C, is cap-independent at 25 ° C but to a lesser extent than 17 ° C. The results showing sexual translation activity were obtained. This translational activity suggests that a sufficient amount of viral protein is translated even at 25 ° C., which is about 10 times higher than that of the normal mRNA with cap and poly (A), Ru. It is clear from this that translation of the viral protein of RNA1 does not show the same temperature dependence as "replication".
- RNAN of RCNMV the process of 4 above
- the temperature sensitivity of “replication” of RNA 1 is 2) above. It is thought that they are involved in the process of recognition of the genomic RNA of the protein (in particular, ⁇ -UTR), or the process of synthesis of negative-strand RNA from the genomic RNA described above.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2002-320495
- Patent Document 2 Patent No. 2814433
- Patent Document 3 Japanese Patent Application Laid-Open No. 2002-338597
- Non-Japanese Literature 1 Hiroyuki izumoto, Yasufumi Hikichi, and Tetsuro Okuno, Viology 293 (2002), p320-327
- An object of the present invention is to solve the above-mentioned problems in the prior art and to achieve the following objects. That is, the present invention is not restricted by the species of the host cell used for live cell line protein synthesis or the species of the extract from the cell free protein, and enhances mRNA translation activity and controls the temperature. It is an object of the present invention to provide a translation control polynucleotide which is capable of enhancing translational activity particularly at low temperature (less than 20 ° C.).
- a thread change vector comprising the translation control polynucleotide, the translation control polynucleotide, a transformant into which! / ⁇ of the recombinant vector has been introduced, a method of protein synthesis using the translation control polynucleotide,
- An object of the present invention is to provide an in vitro translation kit and a protein synthesizer.
- the red clover necrotic mosaic virus (Red Clover) showed temperature dependency upon replication of genomic RNA.
- the RNA1 power of Necrotic Mosaic Virus, RCNMV) In its non-translated region, it has been found that it has a region that enhances translational activity, particularly translational activity under temperature conditions of less than 20 ° C., leading to the completion of the present invention.
- the present invention is based on the above findings by the present inventors, and means for solving the above problems are as follows. That is,
- the translational activity of the mRNA after incorporation is such that translational activity X under a temperature condition of less than 20 ° C. and translational activity Y under a temperature condition of 20 ° C. or more satisfy the relationship of XZY ⁇ 1.
- a translational control polynucleotide characterized in that
- RNA sequence shown in SEQ ID NO: 7 (2) RNA sequence shown in SEQ ID NO: 7, (3) Sequence The RNA sequence shown in No. 7 and a polynucleotide hybridizing under stringent conditions, and (4) at least one of the partial arrays of the polynucleotides of any one of (1) to (3) above. And incorporated into the 3 rules of the mRNA encoding the amino acid sequence,
- the translational activity of the mRNA is enhanced compared to before incorporation, and
- the translational activity of the mRNA after incorporation is such that translational activity X under a temperature condition of less than 20 ° C. and translational activity Y under a temperature condition of 20 ° C. or more satisfy the relationship of XZY ⁇ 1.
- a translational control polynucleotide characterized in that
- ⁇ 3> The translation regulatory polynucleotide according to any one of ⁇ 1> to ⁇ 2>, wherein the translational activity at 17 ° C. is controlled to be higher than that at 25 ° C.
- RNA sequence shown in SEQ ID NO: 39 (2) the RNA sequence shown in SEQ ID NO: 39, a polynucleotide in which one or more bases are deleted, substituted or added, and (3 ) The translation control polynucleotide according to any one of ⁇ 1> to ⁇ 3> above, comprising at least one of the RNA sequence shown in SEQ ID NO: 39 and a polynucleotide that hybridizes under stringent conditions. is there.
- RNA sequence shown in SEQ ID NO: 1 (2) in the RNA sequence shown in SEQ ID NO: 1, a polynucleotide in which one or more bases are deleted, substituted or added, and (3) The translation control polynucleotide according to any one of ⁇ 1> to ⁇ 3> above, including at least one of the RNA sequence shown in SEQ ID NO: 1 and a polynucleotide that hybridizes under stringent conditions. is there.
- RNA sequence shown in SEQ ID NO: 3 (2) in the RNA sequence shown in SEQ ID NO: 3, a polynucleotide in which one or more bases are deleted, substituted or added, and (3) The translation control polynucleotide according to any one of ⁇ 1> to ⁇ 3> above, which contains at least one of the RNA sequence shown in SEQ ID NO: 3 and a polynucleotide hybridizing under stringent conditions. is there.
- RNA sequence shown in SEQ ID NO: 13 (2) RNA shown in SEQ ID NO: 13 A polynucleotide in which one or more bases are deleted, substituted or added in the sequence, and (3) a polynucleotide which hybridizes with the RNA sequence shown in SEQ ID NO: 13 under stringent conditions It is a translation control polynucleotide according to any one of the above ⁇ 1> and ⁇ 3> including at least one of them.
- RNA sequence shown in SEQ ID NO: 5 (2) The RNA sequence shown in SEQ ID NO: 5, a polynucleotide in which one or more bases are deleted, substituted or added, and (3) A translation control polynucleotide according to any one of 2> and 3> of the above, including at least one of the RNA sequence shown in SEQ ID NO: 5 and a polynucleotide hybridizing under stringent conditions; is there.
- RNA sequence shown in SEQ ID NO: 17 and a polynucleotide which hybridizes under stringent conditions one or more bases are deleted, substituted, Or a polynucleotide added, (3) RNA sequence shown in SEQ ID NO: 17 and a polynucleotide which hybridizes under stringent conditions, and (4) any one of the above (1) to (3).
- ⁇ 11> The translation control polynucleotide according to any one of ⁇ 1> to ⁇ 10>, which is a sequence derived from RNA 1 of Red clover 'necrotic' mosaic virus (RCNMV).
- RNNMV Red clover 'necrotic' mosaic virus
- the translational activity of the base sequence is enhanced compared to before incorporation, and
- the translational activity of the base sequence after incorporation is such that translational activity X under a temperature condition of less than 20 ° C. and translational activity Y under a temperature condition of 20 ° C. or more satisfy the relationship of XZYZ1.
- a translational control polynucleotide characterized in that
- the translational activity of the base sequence is enhanced compared to before incorporation, and
- the translational activity of the base sequence after incorporation is such that translational activity X under a temperature condition of less than 20 ° C. and translational activity Y under a temperature condition of 20 ° C. or more satisfy the relationship of XZYZ1.
- a translational control polynucleotide characterized in that
- ⁇ 14> A translation control polynucleotide according to ⁇ 12> to ⁇ 13>, wherein the translation activity at 17 ° C. is controlled to be higher than that at 25 ° C.
- ⁇ 16> (1) In the DNA sequence shown in SEQ ID NO: 2, (2) in the DNA sequence shown in SEQ ID NO: 2, a polynucleotide in which one or more bases are deleted, substituted or added, and ( 3) The translation control polynucleotide according to any one of the above ⁇ 12> to ⁇ 14>, which contains at least one of the DNA sequence shown in SEQ ID NO: 2 and a polynucleotide that hybridizes under stringent conditions. is there.
- ⁇ 17> (1) A DNA sequence shown in SEQ ID NO: 4, (2) A polynucleotide in which one or more bases are deleted, substituted or added in the DNA sequence shown in SEQ ID NO: 4, 3) The translation control polynucleotide according to any one of ⁇ 12> to ⁇ 14>, which contains at least one of the DNA sequence shown in SEQ ID NO: 4 and a polynucleotide that hybridizes under stringent conditions. .
- a DNA sequence shown in SEQ ID NO: 14 (2) A polynucleotide in which one or more bases are deleted, substituted or added in the DNA sequence shown in SEQ ID NO: 14, and (3) A translation control polynucleotide according to any one of the above 12> and 14> comprising at least one of a DNA sequence shown in SEQ ID NO: 14 and a polynucleotide that hybridizes under stringent conditions. is there.
- ⁇ 22> The translation control polynucleotide according to any one of ⁇ 12> to ⁇ 21>, which is a cDNA for a sequence derived from RNA 1 of Red clover 'necrotic' mosaic virus (RCNMV) is there.
- RNNMV Red clover 'necrotic' mosaic virus
- ⁇ 23> The translation regulatory polynucleotide according to any one of ⁇ 1> to ⁇ 22>, wherein the translational regulation is controlled so as to maximize translational activity under a temperature condition of 17 ° C. or less.
- ⁇ 25> A recombinant vector comprising the translation control polynucleotide according to any one of ⁇ 1> to 24>.
- ⁇ 26> The translation regulatory polynucleotide according to any one of ⁇ 1> to ⁇ 24>, and / or the recombinant vector according to any of ⁇ 25>. Transformants.
- ⁇ 27> The transformant according to ⁇ 26>, which is selected from animal cells, plant cells, fungi and yeasts.
- ⁇ 28> A method for protein synthesis, characterized by using the translation control polynucleotide according to any one of ⁇ 1> to ⁇ 24>.
- ⁇ 29> A method for protein synthesis comprising using the recombinant vector according to ⁇ 25>.
- ⁇ 31> The protein synthesis method according to ⁇ 30>, which is carried out using a wheat germ extract.
- An in vitro translation kit comprising at least the translation control polynucleotide according to any one of ⁇ 1> to ⁇ 24>.
- a protein synthesizer comprising at least a synthetic means for synthesizing an amino acid using the translation control polynucleotide according to any one of ⁇ 1> to ⁇ 24>.
- Fig. 1 is a structural diagram showing RNA1 of an Australian strain of RCNMV, and a secondary structure (stem-loop structure) formed by ⁇ TE-DR1 region which is a translation control polynucleotide of the present invention. It is the schematic diagram which showed.
- Fig. 2 is a structural diagram showing RNA1 of a Canadian strain of RCNMV, showing a secondary structure (stem-loop structure) formed by ⁇ TE-DR1 region which is a translation control polynucleotide of the present invention. It is a schematic diagram.
- FIG. 3 is a structural diagram of each mRNA whose translational activity was evaluated in Example 1.
- the broken line shows the portion into which a deletion was introduced, and the thin line shows the sequence portion of pUCl18.
- FIG. 4 is a schematic view showing a mutation introduced into each stem-loop structure in the 3 'TE-DR1 region in Example 2, Example 3, Example 6, and Example 7.
- FIG. 5 shows a recombinant vector (R15,-XbS) containing a translational control polynucleotide (SEQ ID NO: 15, SEQ ID NO: 16) using tobacco cultured cell protoplasts as host cells in Example 6.
- a recombinant vector in which a mutation has been introduced into the region constituting the stem loop Indicates the results of protein synthesis using one (3'TE-DRlZLml, 3'TE-DR1 / Lm2, 3'TE-DR1 / Lm3, 3'TE-DRlZLm4, 3'TE-DR1 / Lm5) I am a patient.
- FIG. 6 shows a recombinant vector (R1-5 'XbS) containing a translational control polynucleotide (SEQ ID NO: 15, SEQ ID NO: 16) using cowpea protoplast as a host cell in Example 6.
- a recombinant vector (3, TE -DRl / Lml, 3'TE-DR1 / Lm2, 3'TE-DR1 / Lm3, 3'TE-DRl / Lm 4, 3) in which a mutation has been introduced into the region constituting the stem loop.
- FIG. 7 is a graph showing the results of protein synthesis using 'TE-DR1 / Lm5)
- FIG. 7 is a graph showing the results of protein synthesis in a cell-free protein synthesis system using extracts of cultured tobacco cells (BY2) in Example 7.
- FIG. 8 shows that in Example 8, the recombinant vector (R1-5'-XbS) containing the translation control polynucleotide of the present invention derived from RCNMV and the non-translation of sunhemp mosaic virus (SHMV) It is a graph which shows the result of having compared the translation activity of the recombinant vector (SH-luc-SH) containing a region.
- FIG. 9 shows that in Example 9, protein synthesis using an in vitro translation kit containing a recombinant vector containing the translation control polynucleotide of the present invention and other recombinant vectors in vitro
- FIG. 16 is a graph showing the result of comparison with protein synthesis using a system translation kit.
- the translational control polynucleotide of the present invention is a translational control polynucleotide of the present invention.
- A The mRNA encoding the amino acid sequence is incorporated into the rule of mRNA, and the translational activity of the mRNA is enhanced compared to that before incorporation, and the translation activity of the mRNA after incorporation is 20 °.
- a polynucleotide (RN ⁇ ) that controls translational activity X under a temperature condition of less than C and translational activity Y under a temperature condition of 20 ° C. or more to satisfy the relationship of X / Y ⁇ 1, and
- translational activity of the base sequence is enhanced, and the translational activity of the base sequence after incorporation is compared with the translational activity X under temperature conditions of less than 20 ° C. and temperature conditions of 20 ° C. or more.
- Translational activity in Y is a polynucleotide (DNA) that controls to satisfy the relationship of X / Y ⁇ 1.
- the translation activity can be represented by the amount of synthesis of the target amino acid sequence (hereinafter sometimes referred to as "protein") encoded by the mRNA, and "enhancing translation activity” means the amount of protein synthesis P Represents that the relation P> Q is satisfied with respect to the synthetic amount Q before the translation control polynucleotide is incorporated.
- protein target amino acid sequence
- enhancing translation activity means the amount of protein synthesis P Represents that the relation P> Q is satisfied with respect to the synthetic amount Q before the translation control polynucleotide is incorporated.
- a method of quantifying the synthesized amount for example, a method of measuring the concentration of the target protein thus recovered using a spectrophotometer, a radioisotope is incorporated to synthesize the protein of the target, and the emission of the protein is emitted.
- a method of measuring the activity a method of synthesizing a luminescent protein for the purpose of evaluating the activity, and a method of measuring the luminescence amount of the luminescent protein.
- RNA Translation control polynucleotide
- RNA translation control polynucleotide (RNA) of the above (A)
- RNA sequence shown in SEQ ID NO: 15 (2) RNA sequence shown in SEQ ID NO: 15, polynucleotide in which one or more bases are deleted, substituted or added, (3 ) At least a portion of the polynucleotide sequence shown in SEQ ID NO: 15 and a polynucleotide that hybridizes under stringent conditions, and (4) any one of the polynucleotide sequences of (1) to (3) above. And a translation control polynucleotide containing any one of
- RNA sequence shown in SEQ ID NO: 7 (2) in the RNA sequence shown in SEQ ID NO: 7, a polynucleotide in which one or more bases are deleted, substituted or added, (3 And / or (4) a partial sequence of any one of the polynucleotides of (1) to (3) above, and the RNA sequence shown in SEQ ID NO: 7 and a polynucleotide that hybridizes under stringent conditions; And translation control polynucleotides.
- a polynucleotide that hybridizes under stringent conditions is a polynucleotide that has been identified (eg, the RNA sequence shown in SEQ ID NO: 15 in (I) above) and 90 % Or more, preferably 95% or more, more preferably 97% or more.
- a polynucleotide which causes hybridization only when it is present is about 5 ° C. to about 30 ° C., preferably about 10 ° C. to about 25 ° C., than the melting temperature (Tm) of complete hybridization. It refers to a polynucleotide in which hybridization occurs at a low temperature.
- the stringent conditions include, for example, J. Sambrook et al., Molecular Cloning, Alaboratory
- a polynucleotide in which one or more bases are deleted, substituted or added is a polynucleotide (for example, a sequence number in the case of (I) described above).
- 15 refers to a polynucleotide having a mutation such as deletion, substitution or addition of 1 to 30, preferably 1 to 20, more preferably 1 to 10 bases in the RNA sequence shown in 15).
- the means for deletion, substitution or addition of the bases can be selected appropriately from known methods without particular limitation.
- the translation regulatory polynucleotide of (A) includes the translation regulatory polynucleotide of (B) which is a cDNA of the translation regulatory polynucleotide of (A).
- it may be an RNA sequence transcribed along with the base sequence and present in the rule of the mRNA.
- translational activity at 17 ° C. of mRNA is preferably controlled to be higher than translational activity at 25 ° C. It is more preferable that the control be performed so as to maximize translational activity at 17 ° C.
- the translational control polynucleotide is less likely to be synthesized under high temperature (for example, 25 ° C. or higher) conditions, or low in yield (for example, 17 ° C. or less)! /, It is suitably used for protein synthesis.
- Examples of the translation control polynucleotide of (A) include
- a translation control polynucleotide of SEQ ID NO: 13 which is a partial sequence of the translation control polynucleotide of (I) above,
- a translation control polynucleotide of SEQ ID NO: 5 which is a partial sequence of the translation control polynucleotide of (II), and
- these translation control polynucleotides may be single or may be composed of a plurality of combinations.
- the polynucleotide into which the translation control polynucleotide of (A) above is incorporated can be appropriately selected according to the purpose without particular limitation. However, according to the 5 rules of the mRNA encoding the amino acid sequence,
- RNA sequence shown in SEQ ID NO: 17, (2) Polynucleotide in which one or more bases are deleted, substituted or added in RNA sequence shown in SEQ ID NO: 17, (3) SEQ ID NO: At least one of the RNA sequence shown in FIG. 17 and a polynucleotide that hybridizes under stringent conditions, and (4) a partial sequence of any one of the polynucleotides of (1) to (3) above are incorporated.
- the mRNA (polynucleotide) into which the translation control polynucleotide of (A) is incorporated it may have at least one of a poly A structure at the 3 'end and a Cap structure at the ⁇ end. It is not necessary to have all of them. When incorporated into a polynucleotide having a 3, terminal poly A structure and a ⁇ terminal Cap structure, the translational activity of the mRNA can be further enhanced.
- the amino acid sequence encoded by the polynucleotide into which the translation control polynucleotide of (A) is incorporated may be appropriately selected according to the purpose without particular limitation, and may be any of protein and polypeptide chain. Although it may be present, it is preferably a protein. Further, as the above-mentioned protein, a protein having a small expression amount under low temperature conditions, a protein unstable under high temperature conditions, and the like are suitably mentioned.
- region of mRNA (polynucleotide) into which the translation control polynucleotide of (A) is incorporated there are no particular restrictions on the three rules of the region encoding the amino acid sequence, depending on the purpose. Although it can be selected as appropriate, it is preferably a non-translated region
- the translation control polynucleotide of (A) is a sequence derived from RNA 1 of Red clover 'necotic' mosaic virus (RCNMV). It is preferable that the sequence is a sequence derived from RNA1 of the Australian strain shown in SEQ ID NO: 19 or a sequence derived from RNA1 of the Canadian strain shown in SEQ ID NO: 11.
- RNAl of the Australian strain is shown in FIG. 1
- RNA1 of the Canadian strain is shown in FIG. 1
- RNA1 of the RCNMV Australian strain shown in Fig. 1 the translation control polynucleotide of (A) is expressed by the three noncoding regions (hereinafter referred to as "3 '-UTR"). There is an RNA sequence derived from
- the ⁇ UTR of the Australian strain corresponds to the translation control polynucleotide of (I) represented by SEQ ID NO: 15.
- the 3595th force that forms five stem-loop structures is also a 3732th base sequence (hereinafter sometimes represented as “3′TE-DR1”) is the above (I) represented by SEQ ID NO: 13 It corresponds to a translation control polynucleotide.
- Nucleotide is an RNA sequence derived from the 3 'UTR.
- the ⁇ UTR of the Canadian strain corresponds to the translation control polynucleotide of (I) represented by SEQ ID NO: 7.
- 3'TE-DR1 which is the 3595th force et al. 3732th nucleotide sequence forming five stem-loop structures, corresponds to the translation control polynucleotide of (I) shown in SEQ ID NO: 5 above. .
- SL1, SL4 and SL5 have a common base sequence, and the base sequence forming the stem-loop structure shown by SL1 is SEQ ID NO: 39.
- the base sequence corresponding to the translation control polynucleotide of SEQ ID NO: 4, which forms the stem loop structure shown by SL4, corresponds to the translation control polynucleotide of SEQ ID NO: 1, and the base sequence forming the stem loop structure shown by SL5 is It corresponds to the translation control polynucleotide of SEQ ID NO: 3.
- the stem-loop structure is a secondary structure of a hairpin formed by the presence of a complementary sequence in the sequence forming the stem-loop structure to cause a corresponding bond to form a complementary bond (hydrogen bond). is there.
- the translation control polynucleotide of the present invention includes any of the three terminal poly A structure and the ⁇ terminal Cap structure by including the base sequence forming the stem-loop structure.
- the RNA sequence shown in SEQ ID NO: 17 may be incorporated into the 5 rules of mRNA encoding the amino acid sequence
- the RNA sequence shown in SEQ ID NO: 9 is also preferably a sequence derived from RNA1 of the RCNM V! /.
- RNA sequence shown in said SEQ ID NO: 17 is a sequence derived from ⁇ UTR of RNA 1 of said RCNMV Australia strain, and the RNA shown in said SEQ ID NO: 9 The sequence is a sequence derived from ⁇ UTR of RNA1 of the RCNMV Canadian strain.
- RNA1 is extracted from virus particles of RCNMV, and the RNA1 is The cDNA of the present invention is prepared by reverse transcription reaction, then amplified, and the transcripts of the cDNA are mixed with RNA 2 to select those showing infectivity.
- (III) (1) a DNA sequence represented by SEQ ID NO: 16; (2) a DNA sequence represented by SEQ ID NO: 16; a polynucleotide in which one or more bases are deleted, substituted or added; (3) sequence No. 16 and at least one of the partial sequences of the polynucleotides of any of the polynucleotides of (1) to (3) from (1) to (3) above, and (4) a polynucleotide that hybridizes under stringent conditions.
- a translation control polynucleotide comprising
- the translation control polynucleotide of (B) above is a cDNA of the translation control polynucleotide of (A) above, and is incorporated into the three rules of the polynucleotide having a base sequence encoding any amino acid sequence.
- those which express the translation control polynucleotide of (A) on the ⁇ side of mRNA which is transcribed together with the base sequence can be mentioned.
- An embodiment of the translational control of the translation control polynucleotide is, for example, an embodiment in which the translational activity at 17 ° C. of the base sequence is controlled to be higher than the translational activity at 25 ° C. It is more preferable that the mode is such that the translational activity at 17 ° C. is maximized.
- the above-mentioned translation control polynucleotide is less likely to be synthesized under high temperature (for example, 25 ° C. or higher) conditions or low temperature (for example, 17 ° C. or less)! /, It is suitably used for protein synthesis.
- Examples of the translation control polynucleotide of (B) include
- a translation control polynucleotide of SEQ ID NO: 14 which is a partial sequence of the translation control polynucleotide of (III) above,
- the translation control polynucleotides of SEQ ID NO: 40, SEQ ID NO: 2 and SEQ ID NO: 4 which are sequences common to the translation control polynucleotides of (I) and (II) above are preferably mentioned. Furthermore, polynucleotides in which one or more bases of these translation control polynucleotides are deleted, substituted or added, and translation control polys that hybridize under hybridization conditions with these translation control polynucleotides. Nucleotides can be mentioned. In addition, these translation control polynucleotides may be single or may be composed of a plurality of combinations.
- tcttccgaca acgacgtgcg cacaaccaca cagaggtttt ccctctcgac ggcgggttac 60 ccgaaggtga agcccgccg atttctagcg acctattaat acgctaggta cctgtttcc 120 agggtccgat gccggttc 138
- the polynucleotide into which the translation control polynucleotide of (B) is incorporated can be appropriately selected according to the purpose without particular limitation. However, according to the 5 rules of the base sequence encoding the amino acid sequence,
- the amino acid sequence encoded by the polynucleotide into which the translation control polynucleotide of (B) is incorporated may be appropriately selected according to the purpose without particular limitation, and it may be selected from either a protein or a polypeptide chain. Although it may be present, it is preferably a protein. Preferred examples of the protein include proteins having a small expression level under low temperature conditions and proteins unstable under high temperature conditions.
- the region of the polynucleotide into which the translation control polynucleotide of (B) is incorporated is not particularly limited as long as it has three rules of the nucleotide sequence encoding the amino acid sequence, and may be appropriately selected according to the purpose. Force that can be done It is preferable that it is a non-translational region.
- the translation control polynucleotide of (B) be a cDNA of a sequence derived from RNAl of Red clover 'Nekotic' mosaic (RCNMV).
- RNNMV Red clover 'Nekotic' mosaic
- RNA1 of the RCNMV Australian strain shown in FIG. 1 corresponds to the translation control polynucleotide of (III) set forth in SEQ ID NO: 16.
- the cDNA of 3'TE-DR1 which is the 3596th force that forms the five stem-loop structure, and the 3732nd base sequence, corresponds to the translation control polynucleotide of (III) represented by SEQ ID NO: 14. .
- the cDNA of 3'-UTR corresponds to the translation control polynucleotide of (IV) shown in SEQ ID NO: 8.
- the cDNA of 3'TE-DR1 which is the 3595th force et al. 3732th nucleotide sequence forming five stem-loop structures, is the translation control polynucleotide of (IV) shown in SEQ ID NO: 6 above. Equivalent to.
- TE-DR1, SL1, SL4 and SL5 have a common base sequence
- the cDNA of the base sequence forming the stem loop structure shown in SL1 is the above-mentioned sequence
- the translation control polynucleotide of No. 40 corresponds to the translation control polynucleotide of No. 40
- the cDNA of the nucleotide sequence forming the stem loop structure corresponds to the translation control polynucleotide of SEQ ID NO: 2
- the cDNA of the nucleotide sequence forming the stem loop structure shown in SL5 is the translation regulatory poly of SEQ ID NO: 4 It corresponds to a nucleotide.
- the sequence shown in SEQ ID NO: 18 may be incorporated into the 5 rules of the base sequence encoding the amino acid sequence.
- the DNA sequence and the DNA sequence shown in SEQ ID NO: 10 are also cDNAs of the RNA 1 derived sequences of said RC NMV! /.
- the DNA sequence represented by SEQ ID NO: 18 is a cDNA of a sequence derived from ⁇ UTR of RNA1 of the RCNMV Australia strain
- the DNA sequence represented by SEQ ID NO: 10 is the RCNMV Canadian strain. It is a cDNA of the sequence derived from the 5'-UTR of RNA1.
- RNA1 is extracted from virus particles of RCNMV, and the RNA1 is isolated.
- cDNAs are prepared by reverse transcription reaction, then amplified, and the cDNA transcripts are mixed with RNA2 to select those showing infectivity.
- the recombinant vector of the present invention can be appropriately selected according to the purpose without particular limitation, as long as it is a vector containing at least the translation control polynucleotide.
- a recombinant vector for protein expression comprising the translation control polynucleotide and a base sequence encoding a target amino acid sequence (protein), and a recombinant vector for amplifying the translation control polynucleotide Is included.
- the translation control polynucleotide is inserted into three non-translational regions of the region encoding the target amino acid sequence.
- the polynucleotide shown in any one of SEQ ID NOs: 9, 10, 17 and 18 may be inserted into the 5 non-coding region of the region encoding the amino acid sequence of interest; Sequences that enhance activity may be inserted.
- a vector (Lybricon) used to prepare the above-mentioned recombinant vector there is no particular limitation as long as replication is possible in the main cell, and may be appropriately selected depending on the purpose. Examples thereof include plasmid vectors, virus vectors, cosmids, butterflies, and agrobacterial worms.
- bacterial plasmids eg, pBR322, pKC30, pCFM536 etc.
- phage DNA eg, lambda phage etc.
- yeast plasmids eg, pG-1 etc.
- baculovirus as a vector for mammalian cells
- examples include vaccinia virus, viral DNA such as adenovirus, and SV40 and its derivatives.
- the vector may include, for example, an origin of replication, a selection marker, a promoter, an enhancer, a transcription termination sequence (terminator 1), a ribosome binding site, a polyadenylation signal, and the like.
- the vector preferably contains a force having a polylinker having various restriction sites therein, or a single restriction site.
- Specific restriction sites in the vector can be cleaved by a particular restriction endonuclease, and the translational control polynucleotide can be inserted at the cleaved site.
- the plasmid vector in particular limitation can force s appropriately selected depending on the Nag purpose, for example, pBR322, pBR325, pAT153, pUC8 , pUC18, pUC19, pSP RLUC and the like.
- commercially available products include, for example, pQE70, pQE60, pQE-9 (manufactured by Qiagen), pBluescript II KS, ptrc99a, pKK223-3, pDR540, pRIT2T (manufactured by Pharmacia), pET-11a (Manufactured by Novagen), pXTl, pSG5 (manufactured by Stratagene), pSVK3, pBPV, pMSG, pSVL SV40 (manufactured by Pharmacia), and the like.
- virus vector examples include retrovirus, adenovirus, Herpes virus, Sendai virus and the like.
- the pacterio phage can be appropriately selected according to the purpose without particular limitation, and examples thereof include T4 phage, T5 phage, T7 phage, ⁇ phage, M13 and the like.
- the recombinant vector is introduced into a target cell and used.
- the translation control polynucleotide and a base sequence encoding an amino acid of interest For example, a recombinant vector for protein expression containing the gene is suitably used for the preparation of the transformant of the present invention described later.
- the method for using the recombinant vector can be appropriately selected according to the purpose without particular limitation.
- the target cell is infected with the replacement vector comprising a viral vector and introduced into the cell.
- Methods, methods of infecting cells of interest with the above-mentioned recombinant vector, which is Pacteryophage phage, and introducing them into the bacteria, and methods of introducing the above-mentioned recombinant vector consisting of a plasmid vector into the cells of interest Be
- any cells containing any of the translation control polynucleotide of the present invention and the replacement vector of the present invention can be appropriately selected according to the purpose without restriction.
- those which are at least viable and capable of synthesizing a protein at least under temperature conditions at which the translational activity of the translation control polynucleotide is maximized are preferred.
- the method is appropriately selected from known methods without particular limitation according to the purpose.
- the polyethylene glycol method PEG method
- the electrophoresis method the particle gun method
- the microinjection method the ribosome method
- the agrobacterial method and the like can be mentioned.
- the transformant may be a single cell or a plurality of cellular tissues, organs, or individuals.
- Examples of the cells include animal cells, plant cells, fungi, and yeasts.
- the above animal cells can be appropriately selected according to the particular purpose without limitation, and for example, embryonic stem cells such as fertilized eggs, ES cells, EG cells, and EC cells, embryonic cancer cells, hematopoietic stems, etc. Cells, cancerous and immortalized cancer cell lines, cell lines of each organ and the like can be mentioned.
- the animal cells also include cells of transgenic animals into which the translation regulatory polynucleotide has been introduced and transformed.
- the origin of the animal cells can be appropriately selected according to the purpose without particular limitation.
- animals such as mammals, reptiles, birds, amphibians, fish, insects and the like can be mentioned.
- the method for introducing the translation control polynucleotide or the recombinant vector into the animal cell can be appropriately selected according to the purpose without particular limitation.
- they may be administered by injection or the like into the muscle, subcutaneous, or intraperitoneal of an individual animal.
- the plant cells can be appropriately selected according to the purpose without particular limitation, and for example, organs of cultivated plants (eg, leaves, petals, stems, roots, rhizomes, seeds, etc.), tissues (eg, , Epidermis, phloem, soft tissue, xylem, vascular bundles, etc.) sections, protoplasts, etc.
- organs of cultivated plants eg, leaves, petals, stems, roots, rhizomes, seeds, etc.
- tissues eg, , Epidermis, phloem, soft tissue, xylem, vascular bundles, etc.
- protoplasts etc.
- the plant cells also include cells of plants transformed by introducing the translation control polynucleotide from the time of development.
- the origin of the plant cells can be appropriately selected depending on the purpose without particular limitation, and examples include plants such as seed plants, ferns, mosses and algae.
- the method for introducing the translation control polynucleotide or the recombinant vector into the plant cell can be appropriately selected according to the purpose without particular limitation.
- binary vector method of agarose bacteria, particles examples include the bombardment method, the polyethylene glycol method, and the electoral deposition method.
- cells into which the translation control polynucleotide or the recombinant vector has been introduced can be subjected to cell culture, tissue culture, and organ culture, and plant hormones can be used using a known plant tissue culture method. Etc. can be administered and regenerated into plants.
- the translation control polynucleotide of the present invention is introduced into the 3 'non-coding region of the base sequence encoding a protein having an action to increase the yield, a protein that enhances resistance to environmental stress such as cold, etc.
- a protein having an action to increase the yield a protein that enhances resistance to environmental stress such as cold, etc.
- filamentous fungi such as Trichophvtm rubrum, Micro sporum cams, Alternaria alternata. Alter naria ⁇ anax ⁇ Bipolaris brizae etc .: Staphylococcus aureus ⁇ Street ococcus pyogenes. Enterococcus faecalis. Bucillus anthracis. Batcillus sub tilis. Clostridium tetania Listeria monocytogenes. Pseudomonas a eruginosa. Escherichia coli Heamophilis influenzae.
- Neisseria gonorrh oeae Mycobacterium tuberculosis, Corvnebacterium glutamicum, Stre ptomvces antibioticus Salmonella typhi. Edwardsiella tarda Citrobact er freundii. Vibrio Klebsiella pneumoniae. Shigella dvsenteriae. Yersinia pestis Treponema pallidum Leptospira interroganse, Campylobacter jejuni Lactobacillus latis etc. bacteria and the like are recovered. parahaemolvticus, Morganella morganii, Seratia marces cens.
- Fungi that can grow at low temperatures include, for example, microorganisms of the genus Vibrio (Vibrio marinas etc.), microorganisms of the genus Pseudomonas (such as
- Pseudomonas fluorescens Pseudomonas fluorescens. Pseudomonas spnngae ⁇ . Rhodococcus fe microbe. immobilis etc.), Arthrobacter sp. microorganism (Arthrobacter SE, TAD 20 etc.), Cytophaga sp. micro cattle (such as CvtoDhaga KUC-1 strain), Moraxella microorganism (MoE glk)
- the above-mentioned yeast can be appropriately selected according to the purpose without particular limitation.
- the method for confirming that the transformant has been obtained can be appropriately selected according to the purpose without particular limitation.
- a drug resistance gene or the like may be incorporated as a marker, and the recombination may be performed.
- the cells into which the vector has been introduced may be cultured in a drug-containing medium, and the grown cells may be selected.
- the drug resistance gene and the like can be appropriately selected according to the purpose without particular limitations.
- an ampicillin resistance gene a tetracycline resistance gene, Resistance genes, aureobasidin A resistance gene, chloramphenicol resistance gene, kanamycin resistance gene, neomycin resistance gene, phleomycin resistance gene, thorostrepton resistance gene and the like.
- the transformant has expressed the target amino acid sequence (polypeptide, protein)
- it can be appropriately selected according to the purpose of releasing restriction, for example, fluorescent protein, for example Methods, enzyme activity assays, immunohistochemistry and the like.
- fluorescent protein method include a method in which a fluorescent protein gene is incorporated into the recombinant vector, cells into which the recombinant vector has been introduced are cultured, and then ultraviolet light is irradiated to measure the fluorescence of the protein.
- the enzyme activity measurement method for example, a gene of an enzyme protein is incorporated into the recombinant vector and cultured in a culture solution in which color is developed by an enzyme reaction, and then the color development of the culture solution is measured with a spectrophotometer.
- the method of quantifying an enzyme activity is mentioned.
- proteins other than the enzyme protein hydrogen peroxide and the like are generated to form a chromogenic substance such as a quinone body, and the method may be quantified by measuring it with a spectrophotometer.
- the histochemistry method for example, Western blot method, ELISA method and the like can be mentioned.
- the method for protein synthesis of the present invention can be appropriately selected according to the purpose without limitation, as long as the method uses the translation control polynucleotide and the recombinant vector, for example, a method using a host cell, And methods carried out in cell-free protein synthesis systems (hereinafter sometimes referred to as "in vitro systems").
- the protein synthesis method is preferably performed at less than 20 ° C., and more preferably at 17 ° C. or less.
- the method using the host cell can be appropriately selected from known methods without particular limitation, and, for example, a base sequence encoding a target protein, and the above-mentioned set containing the translation control polynucleotide A host cell into which a replacement vector has been introduced (eg, the transformant) is grown to grow, and the host cell is cultured under a temperature condition of less than 20 ° C. By doing, the method of expressing the said protein of interest is mentioned.
- the host cell may be appropriately selected depending on the purpose without particular limitation, as long as it is a cell capable of synthesizing a protein (for example, eukaryotic cell, E. coli etc.), but the temperature is less than 20 ° C. It is preferably a cell that performs protein synthesis.
- the above protein of interest can be recovered from the culture medium when it is secreted outside the host cell, and when it is present in the host cell, it is obtained by disrupting or dissolving the host cell. It can be recovered from the extract.
- the collected protein of interest can be prepared by ammonium sulfate precipitation, ethanol precipitation, acid extraction, ion exchange chromatography, hydrophobic interaction chromatography, affinity chromatography, or the like with respect to the medium or the extract. It can be purified by known methods such as gel filtration chromatography, HPLC, electrophoresis, chromatofocusing and the like.
- a protein is synthesized without introducing a base sequence encoding a protein of interest and the recombinant vector containing the translation control polynucleotide into a host cell.
- the method is a method of extracellularly synthesizing a protein by adding the recombinant vector, an amino acid, an energy source, various ions, a buffer solution and the like to a cell extract containing ribosomes and the like. .
- mRNA may be used as a template, and a method of synthesizing only a protein on ribosomes based on the information of the mRNA may be used. And a translation method.
- the reaction solution used for the above-mentioned cell-free protein synthesis system can be appropriately selected according to the type of the target protein and the like.
- the cell extract includes, for example, cell extracts such as E. coli, plant seed germ (eg, wheat germ, wheat germ, rice germ, corn germ, etc.), and rabbit reticulocytes etc., among them.
- Wheat germ extract is preferred, as extracts of cells able to grow under temperature conditions of less than 20 ° C. are preferred.
- the method for preparing the cell extract may be appropriately selected according to the purpose without particular limitation. For example, a process for removing a translation inhibitor, a nucleolytic enzyme, etc., an activity of a translation inhibitor, etc. It is preferable to carry out the process of suppressing
- amino acids examples include amino acids that constitute proteins.
- the energy source includes, for example, either ATP or GTP.
- various ions include acetates such as potassium acetate, magnesium acetate and ammonium acetate, glutamates and the like.
- Examples of the buffer include Hepes-KOH, Tris-OAC, and the like.
- Examples of the ATP regeneration system include a combination of phosphoenol pilpate and pyruvate kinase, or a combination of creatine phosphate (creatine phosphate) and creatine kinase.
- nucleolytic enzyme inhibitor examples include ribonuclease inhibitor, nuclease inhibitor and the like.
- Examples of the reducing agent include dithiothreitol and the like.
- Examples of the antibacterial agent include sodium azide, ampicillin and the like.
- Examples of the RNA polymerase include SP6 RNA polymerase, T7 RNA polymerase, and the like.
- any known method without particular limitation can be appropriately selected, and for example, the reaction solution is mixed in one reaction vessel
- Method and method using a reaction vessel in which a reaction part for synthesizing a protein and a supply part for supplying a substance necessary for protein synthesis are divided by a semipermeable membrane or the like dialysis method
- reaction part and supply instead of separating the part with a semipermeable membrane, the liquid to be supplied is mixed with a substance with a high specific gravity such as glycerol, and the specific gravity of the reaction liquid is increased to be supplied.
- the specific gravity is small! /
- the method of overlaying the reaction solution (overlayer method), etc. may be mentioned.
- the target protein synthesized by the cell-free protein synthesis system can be purified from the reaction solution by known protein purification methods such as gel filtration, ion exchange chromatography, affinity chromatography, reverse phase chromatography and the like. It is isolated and purified by combining as appropriate.
- the in vitro translation kit of the present invention comprises at least the translation control polynucleotide of the present invention, and is suitably used in the aforementioned protein synthesis method.
- the in vitro translation kit includes at least the recombinant vector for incorporating the translation control polynucleotide, and incorporating a base sequence encoding a target protein, and further, a cell extract, It contains an ATP regeneration system reagent, and optionally contains all or part of reagents necessary for the cell-free protein synthesis system.
- the in vitro translation kit of the present invention may further contain a reaction vessel.
- the configuration of a known in vitro translation kit can be adopted, and, for example, JP-A 2003-102495, Current Opinion Biotechnology 9: 534-548 (1998), J. Biotechnology 41: 81-90 (1995), etc. can be referred to.
- the cell extract to be used in the in vitro translation kit can be appropriately selected according to particular limitations, for example, E. coli, plant seed germ (eg, wheat germ, wheat germ) Cell extracts of germ, rice germ, corn germ, etc., plant-derived cultured cells (eg, cultured tapaco cells), etc. Wheat germ extract is preferred, as extracts of possible cells are preferred.
- plant seed germ eg, wheat germ, wheat germ
- plant-derived cultured cells eg, cultured tapaco cells
- Wheat germ extract is preferred, as extracts of possible cells are preferred.
- the protein synthesis apparatus of the present invention comprises at least a synthetic means for synthesizing an amino acid using the above-mentioned translational control polynucleotide, and is suitably used for the above-mentioned protein synthesis method.
- the protein synthesis apparatus of the present invention have a temperature control means.
- the temperature control means preferably controls protein synthesis to be performed at less than 20 ° C., and more preferably at 17 ° C. or less.
- the temperature control means can be appropriately selected from known devices and the like according to the purpose of being not particularly limited, and, for example, even if it is a protein module integrated with the protein synthesis device, It may be a thermostat, a CO incubator, or the like externally attached to the protein synthesizer.
- Examples of the synthesis means used in the protein synthesis method using the host cell include, for example, a bioreactor and the like.
- Examples of the synthesis means used for the cell-free protein synthesis include a supply means for supplying the cell extract, the recombinant vector, an amino acid, an energy source, various ions, a buffer solution, etc .; And a container for carrying out a protein synthesis reaction, and a discharge means for discharging the product.
- the container may be divided into a reaction tank and a supply tank with a semipermeable membrane or the like.
- the cell extract can be appropriately selected depending on the purpose of being particularly restricted but, for example, wheat germ extract, E. coli extract, tobacco culture cell extract and the like are preferred. Among them, wheat germ is preferred. Extracts are more preferred.
- a preferred example of the protein synthesizer is, as a specific example, a reaction temperature gradient thermostat equipped with the reaction vessel, or a container divided by a semipermeable membrane, and the supply vessel and the reaction vessel are formed. And devices capable of performing transcription and translation continuously.
- the protein synthesis method using the protein synthesizer for example, using the in vitro translation kit, can continuously supply the substrate and energy necessary for the reaction through the semipermeable membrane, and the cell extract Protein synthesis can be performed up to 24 hours using.
- high level transcription is performed by T7 RNA polymerase, and then translation is performed using components (tRNA, ribosomes, enzymes, factors, etc.) in the cell extract.
- the supply tank contains ions, nucleotides serving as an energy source and a substrate, and amino acids, and these substances are supplied to the reaction tank through a semipermeable membrane. Similarly, by convection from the reaction vessel to the supply vessel, the inhibitory low molecules formed by the reaction in the reaction vessel are effectively diluted.
- the translation control polynucleotide of the present invention is not restricted by the species of the organism from which the extract is used for host cells or cell-free proteins, and is capable of enhancing mRNA translation activity and capable of temperature control. In order to enhance translational activity, particularly at low temperatures (less than 20 ° C.), it is suitably used for synthesis of unstable proteins under high temperature conditions, and synthesis of proteins with low yield under low temperature conditions. In addition, since a plant body as a transformant with the translation control polynucleotide is suitable for cold region agriculture and the like, the translation control polynucleotide is suitably used for breed improvement for cold region agriculture.
- RNA1 was extracted from RCNMV Australia strain by a known method.
- the full-length cDNA of RNA1 was synthesized by the following method, the translational control polynucleotide was cut out, and incorporated into a polynucleotide having a nucleotide sequence encoding luciferase, to prepare a recombinant vector.
- RNA1 (30 ⁇ g), 1 U of poly (A) polymerase (Takara Bio Inc.), 40 mM Tris-monohydrochloric acid (pH 8.0), 10 mM MgCl, 250 mM NaCl, 2.5 mM M
- the cDNA obtained by the reverse transcription reaction was amplified by PCR.
- the PCR reaction is performed using an Ex tag polymerase (Takara Bio Inc.) and an lOpmol adapter (SEQ ID NO: 22: 5'-CGACTCGAGTCGACATCGA-3 ') as a primer, / Rlint5' (SEQ ID NO: 23: 5'-TGAGCAGATAAACGCCAATC) -3) 1 cycle at 94 ° C for 4 minutes, then 1 minute at 94 ° C, 1 minute at 50 ° C, 2 minutes at 72 ° C, then 2 cycles at 94 ° C 1 cycle at 55 ° C, 1 cycle at 72 ° C, 1 cycle at 94 ° C, 1 minute at 55 ° C, 1 cycle at 55 ° C, 10 cycles at 72 ° C. .
- the cDNA was recovered, and electrophoresis was performed using a 1% low melting point agarose gel (manufactured by FMC Bioproducts) to confirm its length.
- the length of the cDNA was found to be 1.9 kb.
- the recovered cDNA is cleaved with restriction enzyme Xhol, and then using DNA Regission Kit Ver. 1 (Takara Baio Co., Ltd.) at the corresponding site of pBluescriptll (KS) (Stratagyen). This was subjected to auto sequencing (manufactured by Applied Norsystems) to determine the sequence of the ⁇ terminal of RNA1.
- RNA1 The reverse transcription reaction of RNA1 was carried out using RNA1 (1 g), Superscript II (manufactured by Invitrogen), and 20 pmol of 3'RZCl (SEQ ID NO: 24: 5'-TACCCCGGGGTACCCTAGCGGTTAC-3 as primers). The reverse transcription reaction was performed at 42 ° C. for 60 minutes, 51 ° C. for 30 minutes, and 67 ° C. for 15 minutes.
- the PCR reaction was performed using Ex tag polymerase (Takara Bio Inc.), 2 pmol of poly (T) -adapter as a primer, 24 pmol of adapter, and 24 pmol of SZRlint 3 '(SEQ ID NO: 25: 5'-TTGCG TGGCAATGCAAACCG-3 ' )
- Ex tag polymerase Takara Bio Inc.
- 2 pmol of poly (T) -adapter as a primer
- 24 pmol of adapter and 24 pmol of SZRlint 3 '(SEQ ID NO: 25: 5'-TTGCG TGGCAATGCAAACCG-3 ' )
- SZRlint 3 ' SZRlint 3 '(SEQ ID NO: 25: 5'-TTGCG TGGCAATGCAAACCG-3 ' )
- One cycle is performed for 30 cycles of 94 ° C for 45 seconds, 58 ° C for 45 seconds, 72 ° C for 3 minutes
- the obtained DNA was recovered, and the length was confirmed by electrophoresis using a 1% low melting point agarose gel (manufactured by FMC Bioproducts Co., Ltd.).
- the obtained cDNA was digested with restriction enzyme Xhol, and ligated to the corresponding site of pBluescript (KS) (manufactured by Stratagene) using DNA ligation kit Ver. 1 (manufactured by Takarajyo Co., Ltd.).
- RNA1 The cDNA containing the ⁇ end of RNA1 obtained as described above was applied to Autosequencer (manufactured by Applied Nanosystems) to determine the sequence of the 5 end of RNA1.
- RNA1 The primer prepared on the basis of the nucleotide sequence of RNA1 determined in (1) above, T7Canl5 '(SEQ ID NO: 26: 5'-GCGAGCTCTAATACGACTCACTATAGA ACAAACGTTTTTACCGG- 3 and RCNMV separated using the above-mentioned ⁇ RZCl Reverse transcription was performed on RNA1 of each of the Australian strain and Canadian strain to obtain cDNA.
- the cDNA of the Australian strain was amplified by PCR.
- the PCR reaction is performed using Ex tag polymerase (Takara Bio Inc.) for one cycle of 94 ° C. for 4 minutes, 50 ° C. for 1 minute, 72 ° C. for 5 minutes, and 94 ° C. for 1 minute. Twenty-eight cycles of 1 minute at 60 ° C. and 4 minutes at 72 ° C. were performed, and one cycle of 1 minute at 94 ° C., 1 minute at 60 ° C., and 10 minutes at 72 ° C. was performed.
- Ex tag polymerase Takara Bio Inc.
- the cDNA amplified by PCR was recovered, and electrophoresis was performed using a 1% agarose gel (manufactured by FMC NOProducer Co., Ltd.). The length was confirmed to be 4. O kb. After cleaving this cDNA with restriction enzymes Sacl and Smal, it was ligated into the corresponding region of pUC118 (manufactured by Takara Bio Inc.) to obtain a cDNA clone.
- RNA1 obtained by the transcription reaction of (1) was mixed with RNA2 in an equal amount and inoculated into C. quinoa, and cDNA derived from the transcript showing infectivity was selected.
- RNA1 pRCl
- SP6 RNA polymerase manufactured by Fermentus
- A poly (A) tail added by in vitro transcription.
- the recombinant vector was prepared according to the following method using a plasmid (pSP64-RLUC) having a Renilla Luc gene capable of producing an isolated mRNA transcript.
- the SEQ ID NO: (nt) 1 to 131 in the cDNA fragment of RNA1 of the Australian strain of RCNMV is the primer 5 'RS 1T7 (SEQ ID NO: 27: 5'-GCGAGCTCTAATACGAC TCACTATAGACAAACGTTTTACCGGTTTG-3 '), — (SEQ ID NO: 28: 5 '-AAAACCCATGGACTGGTACGAAAAGTAG-3') (the underlined portion indicates a restriction enzyme region), and pRCl IG force was also amplified by PCR.
- the SEQ ID NO: (nt) in the cDNA fragment of RNA1 of the Australian strain of RCNMV is the primer AC5'UTRZNco + (SEQ ID NO: 29: 5'-CGTACCAG TCC ATGGGTTTTATAAATC-3 ') and 3'R / Cl (sequence) Number 30:
- the newly synthesized DNA was amplified using the ⁇ RS1T7 primer and the 3RZC1 primer.
- the amplified 3.9 kb cDNA was treated with restriction enzymes Sacl and Smal, and ligated to the corresponding region of pUCl 18 (Takara Baio Co., Ltd.) to obtain plasmid pURClZNco.
- the plasmid pURClZNco was digested with the restriction enzyme NcolZSphl, and subjected to end-tapping with T4 DNA polymerase.
- the resulting small DNA fragments were recovered by electrophoresis on 1% low melting point agarose gel (manufactured by FMC Bioproducts).
- the recovered small DNA fragment is treated with T4 DNA polymerase and pSP digested with restriction enzymes Xbal and Hpal.
- the vector was introduced into -Luc + (Promega) to prepare a recombinant vector (pRl-5'-NS) containing the full length RNA1.
- a DNA fragment obtained by cleaving pURClZNco with Sac1ZNcoI was inserted into the NdelZNcoI region of pRl-XbS to prepare a recombinant vector (pRl-5'-XbS) containing the 5'-UTR and 3'-UTR of RNA1.
- the recombinant vector comprises the translation control polynucleotide (SEQ ID NO: 14) of the present invention.
- the plasmid ⁇ 3'-8 carrying the 60-nt poly A region was cleaved with Hindlll / Accl, and a DNA fragment prepared by cleaving pL UCpA30 with Hindlll ZSacI was inserted, and a vector for comparison with poly A (pLUCA30) was produced.
- the plasmid pLUCpA30 was prepared by recombining the Renilla Luc gene of pSP64-RLUC with the firefly Luc gene.
- the nucleotide sequences of each of the obtained recombinant vectors were analyzed using ABI310 automatic sequencer.
- Each of the above recombinant vectors was linearized, and a transcription reaction was performed.
- RNA1 The recombinant vector (pRl-5, -NS) containing the full length of RNA1 and the recombinant vector (pRl-5'-XbS) containing 51 UTR and 3'-UTR of RNA1 were digested with Smal. After linearization, transcription was performed using T7 RNA polymerase to prepare Rl-5'-NS and R1 5'-XbS.
- RNA1 The recombinant vector (pRl-Xbs) containing the 3-UTR of RNA1 is cleaved with Smal and linearized, and then transcribed using SP6 RNA polymerase (manufactured by Fermentas) to prepare R1-Xbs. did.
- the pA60 was cleaved with EcoRI to form a linear chain, followed by transcription using the T7 RNA polymerase to prepare A40.
- a cap structure analog (m 7 GpppG) manufactured by New England Noorabs Co., Ltd. is used, and mRNA having a Cap structure at the 5 'end and V ⁇ mRNA having a Cap structure are described below. Were prepared respectively.
- the mRNA having a Cap structure is 1 ⁇ T7 RNA polymerase buffer, 10 mM DTT, ImM ATP, ImM UTP, ImM CTP, 0.2 mM GTP, 2 mM RNA cap
- a transcription solution containing structure analog (m 7 GpppG), 60 ng z L lineari zed DNA, and lOUZl O T 7 RNA polymerase was used for transcription reaction at 37 ° C for 2 hours, and then RQI RNase- free DNase (Promega)
- the DNA of each plasmid was prepared by digestion under the reaction conditions of 37 ° C. for 30 minutes.
- the aforementioned mRNA having no Cap structure is linearized with 1 X T7 RNA polymerase buffer, 10 mM DTT, ImM ATP, ImM UTP, ImM CTP, ImM GTP, and 60 ngZ L.
- RNA polymerase buffer 10 mM DTT, ImM ATP, ImM UTP, ImM CTP, ImM GTP, and 60 ngZ L.
- transcription reaction is performed at 37 ° C for 2 hours, and then using RQI RNase-free DNase (manufactured by PUGA Mega Corp.) for 30 minutes at 37 ° C.
- the DNA of each plasmid was prepared by digestion under the reaction conditions of
- each reaction solution is saturated with distilled water, and the reaction solution is added to an ImL syringe (manufactured by Terumo Co., Ltd.) packed with a Amersham Sephadex G-50 fine carrier, and the reaction is carried out at 1200 ⁇ g for 5 minutes. And centrifuged using a swing rotor.
- reaction solution is passed through a column, ethanol precipitated, dissolved in distilled water, and the concentration is A.
- the back epidermis of the first leaf of cowpea (Vigna unguiculata cv. California Blackeye) cultured for 10 to 16 days is peeled off with tweezers, and the enzyme solution (0.5 M man-tol, 5 mM CaCl, 1% (WZV) cellulase Onozuka R- 10 (Yakult Co., Ltd.), 0. 05%
- the peeled surface was floated down on (W / V) macerozyme R-10 (manufactured by Yakult Co., Ltd.), and shaken at 40 rpm at 25 ° C. for 4 hours to obtain a protoplast.
- the protoplasts were filtered through 4 layers of gauze and collected by centrifugation (50 ⁇ g, room temperature, 3 minutes), and then washed three times with 0.5 M man-torol and 5 mM CaCl,
- the number of cells was counted by a counter.
- Each of the above recombinant vectors (R1-5'-NS, R1-5'-XbS, Rl-XbS, and pA60) is attached to the wall of the plastic tube, and 200 ⁇ L of PEG solution (40% WZV polyethylene glycol, Pour into protoplasts with 3 mM CaCl, pH 5.5) for 20 seconds
- the protoplast (transformant) was prepared using culture solution (0.2 mM KH PO, ImM KNO).
- each recombinant vector only pA60 has the force Cap structure.
- the structure of each recombinant vector is as shown in FIG.
- the translation control poly of the present invention represented by SEQ ID NO: 39 (SEQ ID NO: 40 as cDNA) and SEQ ID NO: 1 (SEQ ID NO: 2 as cDNA), which is a sequence forming a stem loop structure in RNA1 of RCNMV.
- Recombinant vectors p3'TE-DR1 / Lml and p3'TE-DR1 / Lm4 in which mutations were introduced into nucleotide sequences by the following method were prepared.
- Primer Luc + 3'FW (SEQ ID NO: 33: 5 'T GTGGACGAAGTACGCAAAGGTCTTGG-3') using pRl-5 'XbS as a template, and SL4-: LmlZ-(SEQ ID NO 34: 5'-GAGGAAAAGCCTTCTCAGCGGCGGGTTAC-3 ') And SL4-Lml / + (SEQ ID NO: 35: 5 '-GAGGCTTTTCCTCTGTGTGGT) Using TGCG 3 ') and the combination of: Luc + 3' RV (SEQ ID NO: 36: 5 '-GCAGCGGAACGGACCGAG CGCAGCGAGTCAG-3'), 45 seconds at 94 ° C, 45 seconds at 55 ° C, 72 ° PCR was performed with the conditions of 30 cycles of 1 minute in C, and confirmed that the two fragments of interest are amplified, of, l i u L a Puraima Luc + 3'FW and Luc + 3
- the PCR reaction was carried out 30 cycles of 45 seconds at 94 ° C., 45 seconds at 55 ° C., and 1 minute at 72 ° C.
- PCR-amplified DNA was digested with restriction enzymes SacII and Smal, it was ligated to the corresponding region of pRl-5'-XbS.
- the obtained cDNA was applied to autosequencer (manufactured by Applied Biosystems) to confirm that the mutation was inserted.
- the sequences after insertion of the mutations are shown in each frame of FIG.
- the recombinant vector into which the mutation shown in Lm4 has been introduced is represented as p3, TE-DRlZLm4, and the recombinant vector into which the mutation shown in Lml has been introduced is referred to as p3 'TE-DRlZLml.
- the pRl-5'-XbS, the p3'TE-DRlZLm4, the p3'TE-DRlZLml and the PA60 are linearized in the same manner as in Example 1, and transcription is carried out to obtain each of the ⁇ terminal.
- mRNAs were introduced into protoplasts in the same manner as in Example 1, and luciferase activity (LUC activity) was measured in the same manner as in Example 1.
- LOC activity luciferase activity
- 3 ⁇ 41 5'-1 ⁇ is a recombinant vector comprising a translation control polynucleotide represented by SEQ ID NO: 15 (cDNA as SEQ ID NO: 16) and ⁇ UTR of RNA1.
- ⁇ TE-DRlZLm4 has a base substitution in the region of the translation control polynucleotide of the present invention represented by SEQ ID NO: 1 (cDNA SEQ ID NO: 2) in the above “R1-5'-XbS”.
- “3′TE-DRlZLmlJ is the one in which a base substitution has been performed on the region of the translation control polynucleotide of the present invention represented by SEQ ID NO: 39 (SEQ ID NO: 40 as cDNA) in the above“ R1-5′-XbS ”. is there.
- the SL1 region capable of forming a stem loop, and the SL4 region force translational activity, especially translational activity in a low temperature region. It was found to be an important polynucleotide for enhancing action.
- a mutation is introduced into the sequence of the translation control polynucleotide of the present invention represented by SEQ ID NO: 3 (cDNA as SEQ ID NO: 4) in RNA1 of the RCNMV, which is a sequence forming a stem loop structure.
- a recombinant vector P 3'TE-DR1 / Lm5 was prepared.
- the primers Luc + 3'FW and SL5- A combination of Lml /-(SEQ ID NO: 37: 5 '-CGTGCGGTGTTCCACACACAGAGGTTTTCCC 3) and a thread combination of the above Luc + 3, RV, and SL5-Lml Z + (SEQ ID NO: 38: 5,-GT GTGGAACACCGCACGTCGTTGTCGGAAG 3') A mutation was inserted into SL5 in the same manner as in Example 2 except for the above.
- luciferase activity (LUC activity) was measured in the same manner as in Example 1.
- the activity at 25 ° C. of protoplasts into which pA60 (with Cap structure) was introduced was defined as 1, and the relative value was determined. The results are shown in Table 2.
- 3 ⁇ 41 5'-1 ⁇ is a recombinant vector comprising a translation control polynucleotide represented by SEQ ID NO: 15 (cDNA as SEQ ID NO: 16) and ⁇ UTR of RNA1.
- ⁇ TE—DRlZLm4 is a sequence of SEQ ID NO: 1 (as cDNA) in the above “R1-5′-XbS”.
- the region of the translation control polynucleotide of the present invention shown in column number 2) is subjected to base substitution,
- “3′TE-DRlZLmlJ is the one in which a base substitution has been performed on the region of the translation control polynucleotide of the present invention represented by SEQ ID NO: 39 (SEQ ID NO: 40 as cDNA) in the above“ R1-5′-XbS ”. Yes,
- “3′TE-DRlZLm5” is a base substitution in the region of the translation control polynucleotide of the present invention represented by SEQ ID NO: 3 (SEQ ID NO: 4 as cDNA) in the “R1-5′-XbS”. It is
- the stem loop formable SL5 region like the SL1 region and SL4 region, translational activity, particularly low temperature It has been found that it is an important polynucleotide for its action to enhance translational activity in the region.
- WGE wheat germ extract
- RRL rabbit reticulocyte extract
- the pA60 (having a Cap structure) prepared as in Example 1 was used as a control for comparison with the recombinant vector.
- RNAs are purified by treating the pA60 and the R1-5'-XbS with an lmL syringe column packed with Sephadex G-50 fine carrier (manufactured by Amersham), 2 The concentration was adjusted to 5 ng Zw L.
- the 25 L of the reaction solution containing the RRL is the RRL 17.5, an ImM amino acid mixture ( ⁇ mino Acid Mixture) (Promega Corp.) 0.5 ⁇ l, and 40 U / ⁇ 1 lunasin ribonuclease inhibitor (Rnasin) It was prepared to contain 0.5 L of Ribonuclease Inhibitor (Promega) and 6.5 L of distilled water.
- the reaction was carried out for 2 hours under the conditions of 10 ° C, 17 ° C, 25 ° C and 32 ° C.
- WGE represents a wheat germ extract
- RRL represents a rabbit reticulocyte extract
- the translation control polynucleotide of the present invention has translational activity in the cell-free protein synthesis system, regardless of whether it is an animal cell-derived extract or a plant cell-derived extract. It was found to be enhanced and to enhance translational activity at low temperatures.
- BY2 culture cells Cultured cells derived from tobacco (Nicotiana tabacum L. cv. Bright. Yellow-2) (hereinafter referred to as "BY2 culture cells") were treated with medium (30 g / L sucrose, 0.2 g / L KH PO) every 7 days.
- L. Murashige 'Stag medium mixed salt (Nippon Pharmaceutical Co., Ltd.) 0.1 g / L myo-inositol, 0.001 g / L Vitamin B 1 hydrochloride, 0.2 X 10- 3 g / L 2.4-dichlorophenoxyacetic acid, pH5. 8) It was obtained by subculturing 1.5 mL of the BY2 cell solution in 10 OmL in a sterile condition, shaking culture at 25 ° C. in dark conditions, and subculturing.
- the culture solution of the BY2 culture cells is divided into two 50 mL screw tubes, the BY2 culture cells are allowed to fall spontaneously, and the supernatant of the culture solution is removed with a syringe.
- 4M Man-Tor solution 0.4 M Man-Tor, 20 mM MgCl ⁇ 6%
- Enzyme solution (1.0% cellulase Onozu RS, 0.1% 1% pectolyase Y-23, 0.4M man-tor ⁇ 5.5) is added to the washed 2nd culture cells 5 times the amount of the cell precipitate Then, it was transferred to a 200 mL Erlenmeyer flask, which was wrapped in aluminum foil and then incubated at 30 ° C. for 3 hours. During incubation, cells were gently stirred with a pipette every 15 minutes. After incubation, the condition of the cells was checked with a microscope, and protoplasts were transferred to a glass centrifuge tube with an enzyme solution and centrifuged at 50 ⁇ g for 3 minutes. .
- the supernatant was removed with an aspirator, and the protoplast was suspended by adding 0.4 M man-torque solution to about half of the centrifuge tube and further centrifuged at 50 ⁇ g for 3 minutes. After repeating this washing operation 5 times, the precipitated protoplast was suspended in 0.4 M man-tor solution and transferred to a 50 mL screw tube. After centrifuging again at 50 ⁇ g for 3 minutes, the Man-Tor solution was sufficiently removed with an aspirator to obtain protoplasts of the BY2 cultured cells.
- a recombinant vector (p3, TE-DRl ZLm2, and p3 ') mutated by the following method TE-DRlZLm3) was prepared.
- Each recombinant vector (p3'TE-DR1 / Lm4, p3'TE-DR1 / Lml, p3'TE-DRlZ) prepared as in Examples 2 and 3 with mutations introduced in the stem-loop structure region Lm5), the p3, TE-DRlZLm2, the p3, TE-DRlZLml, and the pRl-5'-XbS prepared in the same manner as in Example 1 and pA60, which are then transcribed after linearization. To create mRNAs that do not have a Cap structure at the ⁇ end.
- the resulting mRNAs were respectively introduced into cowpea protoplasts prepared in the same manner as in Example 1 and in tobacco cultured cells (BY2) protoplasts prepared in the same manner as in Example 5, and cultured at 17 ° C. for 16 hours. Thereafter, the luciferase activity was measured in the same manner as in Example 1.
- Figure 5 shows the results for tobacco cultured cell (BY2) protoplasts. The results are shown in Figure 6 respectively.
- the stem loop formable SL5 region is similar to the SL1 region and SL4 region.
- the polynucleotide is an important polynucleotide in the action of enhancing translational activity in a low temperature range.
- Example 4 The synthesis was performed in the same manner as in Example 4 except that a tobacco cultured cell (BY2) extract prepared by the following method was used as the cell extract constituting the in vitro translation system kit.
- BY2 tobacco cultured cell
- the pA60 (having a Cap structure) prepared in the same manner as in Example 1 was used as a control for comparison with the recombinant vector.
- the results of the above R1-5 and XbS are shown in FIG.
- the LUC activity was measured.
- the translational activity of pA60 (with a Cap structure) was highest at 25 ° C. and 30 ° C. (not shown).
- the translation control polynucleotide of the present invention was found to enhance the translational activity at low temperature even in a cell-free protein synthesis system.
- Example 1 in the same manner as the recombinant vector was prepared from RNA1 of RCNMV, from the San Hemp mosaic virus (hereinafter referred to as “SHMV”), the 3′-UTR region, 5, — UTR region cDNAs were prepared and used to produce recombinant vectors in the same manner as in Example 1.
- SHMV San Hemp mosaic virus
- the recombinant vector (SH-luc-SH) containing SHMV's 3, -UTR and 5,-UTR, the recombinant vector (pRl-5 'X bS) containing the RCNMV UTR and UTR, and the pA60 After linearizing them in the same manner as in Example 1, respectively, transcription was performed to prepare mRNA having a Cap structure at each 5 'end.
- the obtained mRNA was introduced into cowpea protoplasts in the same manner as in Example 1 and cultured under temperature conditions of 10 ° C., 17 ° C., 25 ° C. and 32 ° C. for 6 hours to measure luciferase activity. The results are shown in Figure 8.
- a recombinant vector containing the translation control polynucleotide of the present invention derived from RNAN of RCNMV was prepared from SHMV which has a tobamovirus ⁇ UT R known to enhance translational activity. It has been found that the translational activity is enhanced more than the recombinant vector, particularly in the low temperature range.
- the cell extract constituting the in vitro translation system kit, and PR OTEIOS (Wakenyaku Co., Ltd.) are used as the other components, and pE U3- ⁇ is used as a control for comparison with the recombinant vector. What was prepared using was used. These vectors were linearized and then transcribed to produce mRNAs that do not have a Cap structure at each ⁇ end. Using the resulting mRNA, protein synthesis was carried out at temperatures of 17 ° C. and 26 ° C., and the luciferase activity was measured in the same manner as in Example 1. The results are shown in FIG.
- the translation control polynucleotide of the present invention is not restricted by the species of the host cell used for live cell line protein synthesis or the species of the extract from the cell free protein, and enhances the translational activity of mRNA.
- a recombinant vector containing the translational control polynucleotide, any of the translational control polynucleotide and the recombinant vector is introduced.
- the transformant, the protein synthesis method using the translation control polynucleotide, the in vitro translation kit, and the protein synthesizer are capable of synthesizing a protein unstable in a high temperature range (eg, 20 ° C. or higher), It is suitably used for the synthesis of tough proteins for which a sufficient synthesis amount can not be obtained by conventional methods in a low temperature range (for example, less than 20 ° C.) Door is Ru can.
- the above-mentioned translation control polynucleotide is used to improve crop varieties suitable for cold region agriculture etc. Specifically, the northern limit of producible crops such as agricultural crops is transferred further to the north to produce crops in cold regions. It can be used suitably for breed improvement that can bring about a revolution in agriculture, such as enabling greenhouse farming such as house cultivation and enabling double cropping of cereals such as rice.
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