2bl0
From Proteopedia
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PHYSARUM POLYCEPHALUM MYOSIN II REGULATORY DOMAIN
Overview
We have previously identified a single inhibitory Ca2+-binding site in the, first EF-hand of the essential light chain of Physarum conventional myosin, (Farkas, L., Malnasi-Csizmadia, A., Nakamura, A., Kohama, K., and Nyitray, L. (2003) J. Biol. Chem. 278, 27399-27405). As a general rule, conformation of the EF-hand-containing domains in the calmodulin family is, "closed" in the absence and "open" in the presence of bound cations; a, notable exception is the unusual Ca2+-bound closed domain in the essential, light chain of the Ca2+-activated scallop muscle myosin. Here we have, reported the 1.8 A resolution structure of the regulatory domain (RD) of, Physarum myosin II in which Ca2+ is bound to a canonical EF-hand that is, also in a closed state. The 12th position of the EF-hand loop, ... [(full description)]
About this Structure
2BL0 is a [Protein complex] structure of sequences from [Physarum polycephalum] with CA as [ligand]. Active as [[1]], with EC number [3.6.1.32]. Full crystallographic information is available from [OCA].
Reference
Structural evidence for non-canonical binding of Ca2+ to a canonical EF-hand of a conventional myosin., Debreczeni JE, Farkas L, Harmat V, Hetenyi C, Hajdu I, Zavodszky P, Kohama K, Nyitray L, J Biol Chem. 2005 Dec 16;280(50):41458-64. Epub 2005 Oct 13. PMID:16227209
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