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Doc2B acts as a calcium sensor for vesicle priming requiring synaptotagmin-1, M...

Houy, Sébastien; Groffen, Alexander J; Ziomkiewicz, Iwona; Verhage, Matthijs; Pinheiro, Paulo S.; Sørensen, Jakob Balslev

Doc2B is a cytosolic protein with binding sites for Munc13 and Tctex-1 (dynein light chain), and two C2-domains that bind to phospholipids, Ca2+ and SNAREs. Whether Doc2B functions as a calcium sensor akin to synaptotagmins, or in other calcium-independent or calcium-dependent capacities is debated. We here show by mutation and overexpression that Doc2B plays distinct roles in two sequential priming steps in mo...


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