Download MendeleyStructure of a C-terminal fragment of its Vps53 subunit suggests similarity of Golgi-associated retrograde protein (GARP) complex to a family of tethering complexes.
Vasan, N., Hutagalung, A., Novick, P., Reinisch, K.M.(2010) Proc Natl Acad Sci U S A 107: 14176-14181
- PubMed: 20660722
- DOI: https://doi.org/10.1073/pnas.1009419107
- Primary Citation of Related Structures:
3NS4 - PubMed Abstract:
The Golgi-associated retrograde protein (GARP) complex is a membrane-tethering complex that functions in traffic from endosomes to the trans-Golgi network. Here we present the structure of a C-terminal fragment of the Vps53 subunit, important for binding endosome-derived vesicles, at a resolution of 2.9 A. We show that the C terminus consists of two alpha-helical bundles arranged in tandem, and we identify a highly conserved surface patch, which may play a role in vesicle recognition. Mutations of the surface result in defects in membrane traffic. The fold of the Vps53 C terminus is strongly reminiscent of proteins that belong to three other tethering complexes--Dsl1, conserved oligomeric Golgi, and the exocyst--thought to share a common evolutionary origin. Thus, the structure of the Vps53 C terminus suggests that GARP belongs to this family of complexes.
Organizational Affiliation:
Department of Cell Biology, Yale University School of Medicine, New Haven, CT 06520, USA.
