LEA蛋白研究进展

Study of Late Embriogenesis Abundant Protein

LEA蛋白(late embriogenesis abundant prote in,LEA)是生物体中广泛存在的一类与渗透调节有关的家族蛋白,该蛋白的编码基因在植物种子胚胎发育晚期表达量丰富,而且在环境胁迫如干旱、低温、盐胁迫、ABA、紫外辐射和NaHCO3等条件下LEA基因的mRNA也会大量累积。LEA蛋白显著的理化特性是具有很高的亲水性和热稳定性,即使在煮沸条件下也能保持水溶状态。LEA蛋白在细胞中可以稳定细胞膜结构,作为分子伴侣,具有结合离子和防止氧化等作用,被认为是在胁迫过程中对植物起保护作用的物质之一。针对这些重要特性,分别综述了LEA蛋白的分类、结构、编码基因和表达调节方式及其在植物生长过程中的作用。

Late embryogenesis abundant protein（LEA） are a suite of important family proteins found in organisms,which are generally involved in osmoregulation.These genes encoding proteins are expressed abundantly at the late stage embryonic development of plant seeds,or subjected to environmental stress such as drought,low temperature,salt stress,ABA,ultraviolet radiation and saline-alkalization stress.Significant physical and chemical properties of LEA protein feature high hydrophilic and thermal stability,even unde...