Two Rab2 interactors regulate dense-core vesicle maturation.

Two Rab2 interactors regulate dense-core vesicle maturation.
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DOI:
10.1016/j.neuron.2014.02.017
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发表时间:
2014-04-02
期刊:
影响因子:
16.2
通讯作者:
Jorgensen EM
Jorgensen EM
中科院分区:
医学1区
文献类型:
--
作者:
Ailion M;Hannemann M;Dalton S;Pappas A;Watanabe S;Hegermann J;Liu Q;Han HF;Gu M;Goulding MQ;Sasidharan N;Schuske K;Hullett P;Eimer S;Jorgensen EM

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Peptide neuromodulators are released from a unique organelle: the dense-core vesicle. Dense-core vesicles are generated at the trans-Golgi, and then sort cargo during maturation before being secreted. To identify proteins that act in this pathway, we performed a genetic screen in Caenorhabditis elegans for mutants defective in dense-core vesicle function. We identified two conserved Rab2-binding proteins: RUND-1, a RUN domain protein, and CCCP-1, a coiled-coil protein. RUND-1 and CCCP-1 colocalize with RAB-2 at the Golgi, and rab-2, rund-1 and cccp-1 mutants have similar defects in sorting soluble and transmembrane dense-core vesicle cargos. RUND-1 also interacts with the Rab2 GAP protein TBC-8 and the BAR domain protein RIC-19, a RAB-2 effector. In summary, a new pathway of conserved proteins controls the maturation of dense-core vesicles at the trans-Golgi network.
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