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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Structure of the first C2 domain of synaptotagmin I: a novel Ca2+/phospholipid-binding fold.

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.[1]

References

  1. Structure of the first C2 domain of synaptotagmin I: a novel Ca2+/phospholipid-binding fold. Sutton, R.B., Davletov, B.A., Berghuis, A.M., Südhof, T.C., Sprang, S.R. Cell (1995) [Pubmed]
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