The C2B domain of synaptotagmin I is a Ca2+-binding module.

Abstract

Synaptotagmin I is a synaptic vesicle protein that contains two C(2) domains and acts as a Ca(2+) sensor in neurotransmitter release. The Ca(2+)-binding properties of the synaptotagmin I C(2)A domain have been well characterized, but those of the C(2)B domain are unclear. The C(2)B domain was previously found to pull down synaptotagmin I from brain… (More)

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