卡尔文-本森-巴萨姆循环的调节  

Regulation of the Calvin-Benson-Bassham cycle

作　　者：李春荣 张馨 刘翠敏[1,2] LI Chun-Rong;ZHANG Xin;LIU Cui-Min(Key Laboratory of Seed Innovation,Institute of Genetics and Developmental Biology,Chinese Academy of Sciences,Beijing 100101,China;University of Chinese Academy of Sciences,Beijing 100101,China)

机构地区：[1]中国科学院遗传与发育生物学研究所,种子创新重点实验室,北京100101 [2]中国科学院大学,北京100101

出　　处：《生命科学》2024年第10期1213-1225,共13页Chinese Bulletin of Life Sciences

基　　金：国家重点研发计划(2021YFF1000203)。

摘　　要：光合碳还原循环或卡尔文-本森-巴萨姆(CBB)循环是光合自养生物的核心碳反应,每年固定约百亿吨的CO_(2),是无机碳转变为有机碳的主要途径。提高这个循环的固碳效率是提高作物产量的有效途径之一。该循环是由11个酶催化的13步反应构成的代谢网络,循环每进行一次固定一分子CO_(2)。在过去的几十年里,构建的反义与过表达转基因植株揭示了关键酶对循环的调控作用,成为光合作用研究领域的前沿热点与重要改造靶点。本文系统综述该循环途径以及中间代谢物与产物的利用,以及11个反应酶和非酶因素对循环的调控作用,重点阐述核酮糖-1,5-二磷酸羧化酶/加氧酶(Rubisco)对循环及自身活性的调控,最后展望和讨论了CBB循环未来的研究。The Calvin-Benson-Bassham(CBB)cycle is the central carbon reaction path in autotrophs,assimilating a billion tons of CO_(2) every year and gatekeeping between the inorganic and organic phases of the global carbon cycle.Ameliorating CBB cycle efficiency is one promising strategy to increase crop yields.The CBB cycle is a complicated metabolic network including 13 steps catalyzed by 11 enzymes,in which one molecule of CO_(2) is fixed per cycle.In the last decades,antisense and overexpression transgenic plants have been generated and used to ascertain the extent of individual enzymes in regulating the rate of carbon fixation.The regulation of the CBB cycle has become a hotspot and important target in the field of photosynthesis research.This review provides a systematic summary of the cycle pathways and the utilization of circulating intermediate metabolites and products.The regulation of circulation by 11 core enzymes and non-enzymatic factors is elaborated upon,especially the regulation by rebulose-1,5-bisphosphate carboxylase/oxygenase(Rubisco)on the cycle and its own activity.At the end,the future of the CBB cycle research is prospected and discussed.

关 键 词：光合作用 卡尔文-本森-巴萨姆(CBB)循环 核酮糖-1 5-二磷酸羧化酶/加氧酶 碳固定 环境因素 

分 类 号：Q55[生物学—生物化学] Q945.1