The microtubule associated protein syntabulin is required for glucose-stimulated and cAMP-potentiated insulin secretion.

Abstract:

:Syntabulin is a microtubule-associated protein that mediates anterograde transport of vesicles to neuronal processes. Here, we found that syntabulin was expressed in mouse pancreas and insulin-secreting β-cells, and that it partially co-localized with microtubule and insulin-containing granules. The association of syntabulin with these organelles increased upon glucose stimulation. Knock-down of syntabulin by shRNA reduced both basal and glucose-stimulated insulin secretion, and diminished cAMP-Epac2 and cAMP-PKA potentiated insulin secretion. Additionally, syntabulin was preferentially phosphorylated by the Epac2 agonist 8-pCPT-2'-O-Me-cAMP, suggesting that syntabulin could be a novel effector of Epac2 and play a critical role in cAMP-enhanced insulin secretion.

journal_name

FEBS Lett

journal_title

FEBS letters

authors

Ying Y,Li L,Cao W,Yan D,Zeng Q,Kong X,Lu L,Yan M,Xu X,Qu J,Su Q,Ma X

doi

10.1016/j.febslet.2012.08.025

subject

Has Abstract

pub_date

2012-10-19 00:00:00

pages

3674-80

issue

20

eissn

0014-5793

issn

1873-3468

pii

S0014-5793(12)00682-5

journal_volume

586

pub_type

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