Handling calcium signaling : Arabidopsis CaMs and CMLs

摘要: The Arabidopsis genome harbors seven calmodulin (CAM) and 50 CAM-like (CML) genes that encode potential calcium sensors. CAMs only four protein isoforms. Selective pressure to maintain multiple indicates nonredundancy. Sequence divergence, even in the EF hand calcium-binding motif, exists among CMLs and, therefore, divergent functions are likely have evolved. Expression data recently available from Massively Parallel Signature Sequencing Genevestigator compilation of microarrays reviewed. highly relatively uniformly expressed. Differential expression is evident distinct over developmental stages, various organs response many different stimuli. In spite importance mediating plant signaling, physiological CaMs remain largely unknown.