• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of King Saud University >Plant heat-shock proteins: A mini review
【24h】

Plant heat-shock proteins: A mini review

机译：植物热激蛋白：迷你回顾

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Plants as sessile organisms are exposed to persistently changing stress factors. The primary stresses such as drought, salinity, cold and hot temperatures and chemicals are interconnected in their effects on plants. These factors cause damage to the plant cell and lead to secondary stresses such as osmotic and oxidative stresses. Plants cannot avoid the exposure to these factors but adapt morphologically and physiologically by some other mechanisms. Almost all stresses induce the production of a group of proteins called heat-shock proteins (Hsps) or stress-induced proteins. The induction of transcription of these proteins is a common phenomenon in all living things. These proteins are grouped in plants into five classes according to their approximate molecular weight: (1) Hsp100, (2) Hsp90, (3) Hsp70, (4) Hsp60 and (5) small heat-shock proteins (sHsps). Higher plants have at least 20 sHsps and there might be 40 kinds of these sHsps in one plant species. It is believed that this diversification of these proteins reflects an adaptation to tolerate the heat stress. Transcription of heat-shock protein genes is controlled by regulatory proteins called heat stress transcription factors (Hsfs). Plants show at least 21 Hsfs with each one having its role in regulation, but they also cooperate in all phases of periodical heat stress responses (triggering, maintenance and recovery). There are more than 52 plant species (including crop ones) that have been genetically engineered for different traits such as yield, herbicide and insecticide resistance and some metabolic changes. In conclusion, major heat-shock proteins have some kind of related roles in solving the problem of misfolding and aggregation, as well as their role as chaperones.
机译：植物作为固着生物暴露于不断变化的胁迫因素中。诸如干旱，盐分，低温和高温以及化学物质等主要胁迫对植物的影响相互关联。这些因素导致对植物细胞的损害，并导致次级胁迫，例如渗透胁迫和氧化胁迫。植物无法避免暴露于这些因素，而是通过其他一些机制在形态和生理上进行适应。几乎所有的压力都会诱导产生一组蛋白质，称为热激蛋白（Hsps）或压力诱导的蛋白质。这些蛋白质的转录诱导是所有生物中的普遍现象。这些蛋白质根据其近似分子量在植物中分为五类：（1）Hsp100，（2）Hsp90，（3）Hsp70，（4）Hsp60和（5）小热休克蛋白（sHsps）。高等植物至少有20 sHsps，在一种植物中可能有40种sHsps。相信这些蛋白质的这种多样化反映了对热应激的耐受性。热休克蛋白基因的转录受称为热应激转录因子（Hsfs）的调节蛋白控制。植物显示出至少21种Hsfs，每一种都有其调节作用，但它们还可以在周期性的热应激反应的各个阶段（触发，维持和恢复）进行协作。经过基因工程处理的52种植物（包括农作物）具有不同的性状，例如产量，除草剂和杀虫剂的抗性以及某些代谢变化。总之，主要的热休克蛋白在解决错折叠和聚集问题以及它们作为伴侣蛋白的作用中具有某种相关的作用。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号