Exceptionally tight membrane-binding may explain the key role of the synaptotagmin-7 C2A domain in asynchronous neurotransmitter release.
Voleti, R., Tomchick, D.R., Sudhof, T.C., Rizo, J.(2017) Proc Natl Acad Sci U S A 114: E8518-E8527
- PubMed: 28923929 
- DOI: 10.1073/pnas.1710708114
- Primary Citation of Related Structures:  
6ANJ, 6ANK - PubMed Abstract: 
Synaptotagmins (Syts) act as Ca 2+ sensors in neurotransmitter release by virtue of Ca 2+ -binding to their two C 2 domains, but their mechanisms of action remain unclear. Puzzlingly, Ca 2+ -binding to the C 2 B domain appears to dominate Syt1 function in synchronous release, whereas Ca 2+ -binding to the C 2 A domain mediates Syt7 function in asynchronous release ...