4uuy | pdb_00004uuy

Structural Identification of the Vps18 beta-propeller reveals a critical role in the HOPS complex stability and function.

spinqualitylabelsall models 4uuy, resolution 2.14Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4uuy is a 2 chain structure. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: EDO, GOL, SO4 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [PEP3_YEAST] Required for vacuolar biogenesis and for trafficking of hydrolase precursors to the vacuole. Mediates transport at the vacuolar membrane where it may be responsible for tethering transport vesicles on the target membranes. Acts as component of the HOPS complex that acts during the docking stage of vacuole fusion. HOPS is an effector for the vacuolar Rab GTPase YPT7 and is required for vacuolar SNARE complex assembly. It remains bound to SNARE complexes after vacuole fusion. Publication Abstract from PubMed Membrane fusion at the vacuole, the lysosome equivalent in yeast, requires the HOPS tethering complex, which is recruited by the Rab7 GTPase Ypt7. HOPS provides a template for the assembly of SNAREs and thus likely confers fusion at a distinct position on vacu-oles. Five of the six subunits in HOPS have a similar domain prediction with strong simi-larity to COPII subunits and nuclear porins. Here, we show that Vps18 indeed has a 7-bladed beta-propeller as its N-terminal domain by revealing its structure at 2.14 Angstroem. The Vps18 N-terminal domain can interact with the N-terminal part of Vps11 and also binds to lipids. Although deletion of the Vps18 N-terminal domain does not preclude HOPS assembly, as revealed by negative stain elec-tron microscopy, the complex is instable and cannot support membrane fusion in vitro. We thus conclude that the beta-propeller of Vps18 is required for HOPS stability and function, and that it can serve as a starting point for further structural analyses of the HOPS tethering complex. Structural identification of the VPS18 beta-propeller reveals a critical role in the hops complex stability and function.,Behrmann H, Lurick A, Kuhlee A, Balderhaar HK, Brocker C, Kummel D, Engelbrecht-Vandre S, Gohlke U, Raunser S, Heinemann U, Ungermann C J Biol Chem. 2014 Oct 16. pii: jbc.M114.602714. PMID:25324549 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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