Journal
TRENDS IN MICROBIOLOGY
Volume 10, Issue 2, Pages 87-93Publisher
ELSEVIER SCIENCE LONDON
DOI: 10.1016/S0966-842X(01)02284-3
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In bacteria, Ca2+ is implicated in a wide variety of cellular processes, including the cell cycle and cell division. Dedicated influx and efflux systems tightly control the low cytoplasmic Ca2+ levels in prokaryotes. Additionally, the growing number of proteins containing various Ca2+-binding motifs supports the importance of Ca2+, which controls various protein functions by affecting protein stability, enzymatic activity or signal transduction. The existence of calmodulin-like proteins (containing EF-hand motifs) in bacteria is a long-standing hypothesis. Analysis of the prokaryotic protein sequences available in the databases has revealed the presence of several calmodulin-like proteins containing two or more authentic EF-hand motifs, suggesting that calmodulin-like proteins could be involved in Ca2+ regulation in bacteria.
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