Breaking the code: Ca2+ sensors in plant signalling

被引:381
作者
DeFalco, Thomas A. [1 ]
Bender, Kyle W. [1 ]
Snedden, Wayne A. [1 ]
机构
[1] Queens Univ, Dept Biol, Kingston, ON K7L 3N6, Canada
关键词
calcium; calmodulin (CaM); calcium-dependent protein kinase (CDPK); calcineurin B-like protein; calmodulin-like protein (CML); plant signalling; DEPENDENT PROTEIN-KINASE; CALMODULIN-BINDING PROTEIN; GENOME-WIDE IDENTIFICATION; POTENTIAL CALCIUM SENSORS; HETEROTRIMERIC G-PROTEIN; POLLEN-TUBE GROWTH; COMMON ICE PLANT; ABSCISIC-ACID; PLASMA-MEMBRANE; GENE FAMILY;
D O I
10.1042/BJ20091147
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Ca2+ ions play a vital role as second messengers in plant cells during various developmental processes and in response to environmental stimuli. Plants have evolved a diversity of unique proteins that bind Ca2+ using the evolutionarily conserved EF-hand motif. The Currently held hypothesis is that these proteins function as Ca2+ sensors by undergoing conformational changes in response to Ca2+-binding that facilitate their regulation of target proteins and thereby co-ordinate various signalling pathways. The three main classes of these EF-hand Ca2+ sensors in plants are CaMs [calmodulins; including CMLs (CaM-like proteins)], CDPKs (calcium-dependent protein kinases) and CBLs (calcineurin B-like proteins). In the plant species examined to date, each of these classes is represented by a large family of proteins, most of which have not been characterized biochemically and whose physiological roles remain unclear. In the present review, we discuss recent advances in research on CaMs and CMLs, CDPKs and CBLs, and we attempt to integrate the current knowledge on the different sensor classes into common physiological themes.
引用
收藏
页码:27 / 40
页数:14
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