6VOA image
Deposition Date 2020-01-30
Release Date 2020-06-24
Last Version Date 2024-03-06
Entry Detail
PDB ID:
6VOA
Title:
Cryo-EM structure of the BBSome-ARL6 complex
Biological Source:
Source Organism:
Bos taurus (Taxon ID: 9913)
Host Organism:
Method Details:
Experimental Method:
Resolution:
4.00 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:ADP-ribosylation factor-like protein 6
Gene (Uniprot):ARL6
Chain IDs:H (auth: A)
Chain Length:186
Number of Molecules:1
Biological Source:Bos taurus
Polymer Type:polypeptide(L)
Molecule:Bardet-Biedl syndrome 2 protein homolog
Gene (Uniprot):BBS2
Chain IDs:B
Chain Length:721
Number of Molecules:1
Biological Source:Bos taurus
Polymer Type:polypeptide(L)
Molecule:Bardet-Biedl syndrome 7 protein homolog
Gene (Uniprot):BBS7
Chain IDs:E (auth: C)
Chain Length:715
Number of Molecules:1
Biological Source:Bos taurus
Polymer Type:polypeptide(L)
Molecule:BBS1 domain-containing protein
Gene (Uniprot):BBS1
Chain IDs:I (auth: D)
Chain Length:592
Number of Molecules:1
Biological Source:Bos taurus
Polymer Type:polypeptide(L)
Molecule:Bardet-Biedl syndrome 4 protein homolog
Gene (Uniprot):BBS4
Chain IDs:C (auth: E)
Chain Length:519
Number of Molecules:1
Biological Source:Bos taurus
Polymer Type:polypeptide(L)
Molecule:Tetratricopeptide repeat domain 8
Gene (Uniprot):TTC8
Chain IDs:F
Chain Length:501
Number of Molecules:1
Biological Source:Bos taurus
Polymer Type:polypeptide(L)
Molecule:Bardet-Biedl syndrome 5 protein homolog
Gene (Uniprot):BBS5
Chain IDs:D (auth: G)
Chain Length:341
Number of Molecules:1
Biological Source:Bos taurus
Polymer Type:polypeptide(L)
Molecule:Bardet-Biedl syndrome 18 protein
Gene (Uniprot):BBIP1
Chain IDs:A (auth: H)
Chain Length:69
Number of Molecules:1
Biological Source:Bos taurus
Polymer Type:polypeptide(L)
Molecule:Bardet-Biedl syndrome 9
Gene (Uniprot):BBS9
Chain IDs:G (auth: I)
Chain Length:887
Number of Molecules:1
Biological Source:Bos taurus
Ligand Molecules
Primary Citation
Near-atomic structures of the BBSome reveal the basis for BBSome activation and binding to GPCR cargoes.
Elife 9 ? ? (2020)
PMID: 32510327 DOI: 10.7554/eLife.55954

Abstact

Dynamic trafficking of G protein-coupled receptors (GPCRs) out of cilia is mediated by the BBSome. In concert with its membrane recruitment factor, the small GTPase ARL6/BBS3, the BBSome ferries GPCRs across the transition zone, a diffusion barrier at the base of cilia. Here, we present the near-atomic structures of the BBSome by itself and in complex with ARL6GTP, and we describe the changes in BBSome conformation induced by ARL6GTP binding. Modeling the interactions of the BBSome with membranes and the GPCR Smoothened (SMO) reveals that SMO, and likely also other GPCR cargoes, must release their amphipathic helix 8 from the membrane to be recognized by the BBSome.

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Primary Citation of related structures