Freezing tolerance proteins Wcs19 and Wcor410 from gramineae

Chemistry: natural resins or derivatives; peptides or proteins; – Proteins – i.e. – more than 100 amino acid residues – Plant proteins – e.g. – derived from legumes – algae or...

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530370, 435 691, 4352523, 4353201, 536 221, 536 231, 536 236, C07K 14415, C12N 1529

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057314195

ABSTRACT:
The present invention relates to three novel genes which have been isolated from cold-tolerant wheat species and which are induced by low temperature. The first gene, Wcs19, is preferentially expressed in green leaf tissues of tolerant gramineae species and requires both light and low temperature for maximal induction. The second gene, Wcs120, is induced only by low temperature. Different from the protein encoded by Wcs19, the protein encoded by Wcs120 contains two repeated domains that are highly conserved among RAB (rice abscisic acid-induced) and dehydrin families and appears to be light-independent. The Wcs120 protein does not however contain a serine-rich sequence present in RAB and dehydrin families. Finally, the present invention also relates to a third gene, Wcor410, also induced by low temperature as well as water stress and, to a lesser extend, by ABA. Its expression is light-independent. The protein encoded by this gene contains a serine-rich stretch as found in several drought induced proteins.

REFERENCES:
Guo et al, "Characterization of a Cold-Regulated Wheat Gene Related to Arabidopsis cor47", Plant Physiol. 100:915-922 (1992).
Gulick et al, "Stress-Induced Gene ESI35 from Lophopyrum elongatum", Plant Physiol. 103:1031-1032 (1993).
Danyluk et al, "Differential expression of gene encoding an acidic dehydrin in chilling sensitive and freezing tolerant gramineae species", FEBS Letters 344:20-24 (1994).
Houde et al., Plant Physiol. (1992) 99, pp. 1381-1387 Aug., 1992.
Houde et al. Mol. Gen. Genet. (1992) 234:43-48 Jul., 1992.
Danyluk et al. Plant Cell Physiol. (1990) 31 (5) pp. 609-619.
Perras et al. Plant Physiol. (1989) 89, pp. 577-585.
Glover Gene Cloning (1984) pp. 1-19.
Lerner Nature (1982) 299:592-596.

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