1rsy

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Image:1rsy.gif

1rsy, resolution 1.9Å

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STRUCTURE OF THE FIRST C2-DOMAIN OF SYNAPTOTAGMIN I: A NOVEL CA2+(SLASH)PHOSPHOLIPID BINDING FOLD

Overview

C2 domains are regulatory sequence motifs that occur widely in nature. Synaptotagmin I, a synaptic vesicle protein involved in the Ca2+ regulation of exocytosis, contains two C2 domains, the first of which acts as a Ca2+ sensor. We now describe the three-dimensional structure of this C2 domain at 1.9 A resolution in both the Ca(2+)-bound and Ca(2+)-free forms. The C2 polypeptide forms an eight-stranded beta sandwich constructed around a conserved four-stranded motif designated as a C2 key. Ca2+ binds in a cup-shaped depression between two polypeptide loops located at the N- and C-termini of the C2-key motif.

About this Structure

1RSY is a Single protein structure of sequence from Rattus norvegicus with as ligand. Full crystallographic information is available from OCA.

Reference

Structure of the first C2 domain of synaptotagmin I: a novel Ca2+/phospholipid-binding fold., Sutton RB, Davletov BA, Berghuis AM, Sudhof TC, Sprang SR, Cell. 1995 Mar 24;80(6):929-38. PMID:7697723

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