4v0k | pdb_00004v0k

Crystal structure of the CrARL6DN in the GDP bound form

spinqualitylabelsall models 4v0k, resolution 1.44Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4v0k is a 2 chain structure with sequence from Chlre. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: CD, GDP Related: 4v0m, 4v0n, 4v0o Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed The BBSome is a coat-like ciliary trafficking complex composed of proteins mutated in Bardet-Biedl syndrome (BBS). A critical step in BBSome-mediated sorting is recruitment of the BBSome to membranes by the GTP-bound Arf-like GTPase ARL6. We have determined crystal structures of Chlamydomonas reinhardtii ARL6-GDP, ARL6-GTP and the ARL6-GTP-BBS1 complex. The structures demonstrate how ARL6-GTP binds the BBS1 beta-propeller at blades 1 and 7 and explain why GTP- but not GDP-bound ARL6 can recruit the BBSome to membranes. Single point mutations in the ARL6-GTP-BBS1 interface abolish the interaction of ARL6 with the BBSome and prevent the import of BBSomes into cilia. Furthermore, we show that BBS1 with the M390R mutation, responsible for 30% of all reported BBS disease cases, fails to interact with ARL6-GTP, thus providing a molecular rationale for patient pathologies. Structural basis for membrane targeting of the BBSome by ARL6.,Mourao A, Nager AR, Nachury MV, Lorentzen E Nat Struct Mol Biol. 2014 Nov 17. doi: 10.1038/nsmb.2920. PMID:25402481 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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