Marine microbial cryoprotein gene CSP, encoded protein and application thereof

The invention discloses a cryoprotein gene CSP, an encoded protein and the application thereof. The cryoprotein gene CSP disclosed by the invention is derived from marine microbial metagenome and hasa base sequence shown as SEQ ID NO:1. The encoded protein CSP is a type of highly conserved nuclear acid binding proteins, can serve as an RNA molecular chaperone, and participates in cellular physiological activities such as transcription, translation, growth and development, abiotic response stress and the like. According to the characteristic of improving drought endurance and cold resistance of transgenic plants, the cryoprotein gene CSP can be applied to molecular breeding by virtue of a transgenic technology, so that the yield loss of crops during abiotic stress is reduced. 本发明公开了种冷激蛋白基因CSP、其编码的蛋白及其应用。本发明的冷激蛋白基因CSP来源于海洋微生物宏基因组，其碱基序列如SEQ ID NO:1，其编码的蛋白CSP是类高度保守的核酸结合蛋白，可作为RNA分子伴侣，参与转录、翻译、生长发育和应答非生物胁迫等细胞生理活动。这种提高转基因植物的耐旱、耐寒性的特性，可通过转基因技术应用于分子育种上，从而减少农作物在受到非生物胁迫时的产量损失。