The CHEVI tethering complex: facilitating special deliveries

0301 basic medicine -granules Hops Mammalian Corvet 03 medical and health sciences Vesicle Trafficking Megakaryocyte Maturation Pathology Tethering Complexes Animals Humans Chevi Complex Fusion Vipar Arthrogryposis 0303 health sciences Science & Technology Trafficking Vps33b Platelet Renal Dysfunction United Kingdom Protein Transport Oncology Recruitment Life Sciences & Biomedicine Megakaryocytes
DOI: 10.1002/path.4785 Publication Date: 2016-08-24T08:26:50Z
ABSTRACT
AbstractVPS33B and VIPAR comprise the two known components of the recently christened class C Homologues in Endosome–Vesicle Interaction (CHEVI) complex, thought to act as a tethering complex in endosomal trafficking distinct from the HOPS and CORVET complexes in mammalian cells. A recent paper in The Journal of Pathology further explores the role of the CHEVI complex in the biogenesis of α‐granules in megakaryocytes, identifying two novel interactors of this complex: α‐tubulin and SEC22B, and demonstrating that VPS33B expression is required for the localization of SEC22B and the α‐granule cargo VWF to proplatelets in megakaryocytes. These findings advance the current knowledge of the function of the CHEVI complex in α‐granule biogenesis and together with studies in other systems, corroborate its role in the specialized delivery of cargo in different cell types. Copyright © 2016 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.
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