Journal
TRENDS IN CELL BIOLOGY
Volume 25, Issue 7, Pages 408-416Publisher
ELSEVIER SCIENCE LONDON
DOI: 10.1016/j.tcb.2015.02.005
Keywords
membrane trafficking; vesicle; cargo adaptor; GTPase
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Funding
- NIH/NIGMS grant [R01GM098621]
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Cargo adaptors sort transmembrane protein cargos into nascent vesicles by binding directly to their cytosolic domains. Recent studies have revealed previously unappreciated roles for cargo adaptors and regulatory mechanisms governing their function. The adaptor protein (AP)-1 and AP-2 clathrin adaptors switch between open and closed conformations that ensure they function at the right place at the right time. The exomer cargo adaptor has a direct role in remodeling the membrane for vesicle fission. Several different cargo adaptors functioning in distinct trafficking pathways at the Golgi are similarly regulated through bivalent binding to the ADP-ribosylation factor 1 (Arf1) GTPase, potentially enabling regulation by a threshold concentration of Arf1. Taken together, these studies highlight that cargo adaptors do more than just adapt cargos.
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