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J. Bacteriol., Feb 1995, 864-866, Vol 177, No. 3
Copyright © 1995, American Society for Microbiology

Isolation and characterization of a calmodulin-like protein from Halobacterium salinarium

T Rotharmel and G Wagner
Membran- und Bewegungsphysiologie, Botanisches Institut I, Justus Liebig-Universitat, Giessen, Germany.

The first evidence for a calmodulin-like protein in an archaeon, Halobacterium salinarium, is reported here. The calmodulin-like protein, with a molecular mass of 24 kDa and an estimated pI of 4.8, stimulated cyclic nucleotide phosphodiesterase in a calcium-dependent manner. This stimulation could be suppressed by calmodulin inhibitors. The Ca(2+)-binding ability was verified by 45Ca autoradiography.


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