6VBU

Structure of the bovine BBSome complex


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.10 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


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Literature

Structure and activation mechanism of the BBSome membrane protein trafficking complex.

Singh, S.K.Gui, M.Koh, F.Yip, M.C.Brown, A.

(2020) Elife 9

  • DOI: 10.7554/eLife.53322
  • Primary Citation of Related Structures:  
    6VBU, 6VBV

  • PubMed Abstract: 
  • Bardet-Biedl syndrome (BBS) is a currently incurable ciliopathy caused by the failure to correctly establish or maintain cilia-dependent signaling pathways. Eight proteins associated with BBS assemble into the BBSome, a key regulator of the ciliary membrane proteome ...

    Bardet-Biedl syndrome (BBS) is a currently incurable ciliopathy caused by the failure to correctly establish or maintain cilia-dependent signaling pathways. Eight proteins associated with BBS assemble into the BBSome, a key regulator of the ciliary membrane proteome. We report the electron cryomicroscopy (cryo-EM) structures of the native bovine BBSome in inactive and active states at 3.1 and 3.5 Å resolution, respectively. In the active state, the BBSome is bound to an Arf-family GTPase (ARL6/BBS3) that recruits the BBSome to ciliary membranes. ARL6 recognizes a composite binding site formed by BBS1 and BBS7 that is occluded in the inactive state. Activation requires an unexpected swiveling of the β-propeller domain of BBS1, the subunit most frequently implicated in substrate recognition, which widens a central cavity of the BBSome. Structural mapping of disease-causing mutations suggests that pathogenesis results from folding defects and the disruption of autoinhibition and activation.


    Organizational Affiliation

    Department of Biological Chemistry and Molecular Pharmacology, Blavatnik Institute, Harvard Medical School, Boston, United States.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Bardet-Biedl syndrome 18 proteinA [auth 0]69Bos taurusMutation(s): 0 
Gene Names: BBIP1
UniProt
Find proteins for G3N2W1 (Bos taurus)
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
BBS1 domain-containing proteinB [auth 1]592Bos taurusMutation(s): 0 
Gene Names: BBS1
UniProt
Find proteins for E1BN34 (Bos taurus)
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Bardet-Biedl syndrome 2 protein homologC [auth 2]721Bos taurusMutation(s): 0 
Gene Names: BBS2
UniProt
Find proteins for Q32L13 (Bos taurus)
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Bardet-Biedl syndrome 4 protein homologD [auth 4]519Bos taurusMutation(s): 0 
Gene Names: BBS4
UniProt
Find proteins for Q1JQ97 (Bos taurus)
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
Bardet-Biedl syndrome 5 protein homologE [auth 5]341Bos taurusMutation(s): 0 
Gene Names: BBS5
UniProt
Find proteins for A6QLF9 (Bos taurus)
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Entity ID: 6
MoleculeChainsSequence LengthOrganismDetailsImage
Bardet-Biedl syndrome 7 protein homologF [auth 7]715Bos taurusMutation(s): 0 
Gene Names: BBS7
UniProt
Find proteins for F1MB52 (Bos taurus)
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Entity ID: 7
MoleculeChainsSequence LengthOrganismDetailsImage
Bardet-Biedl syndrome 8 proteinG [auth 8]501Bos taurusMutation(s): 0 
Gene Names: TTC8
UniProt
Find proteins for F1N4X0 (Bos taurus)
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Entity ID: 8
MoleculeChainsSequence LengthOrganismDetailsImage
Bardet-Biedl syndrome 9H [auth 9]887Bos taurusMutation(s): 0 
Gene Names: BBS9
UniProt
Find proteins for E1BHJ5 (Bos taurus)
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download Ideal Coordinates CCD File 
I [auth 2], J [auth 2]CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.10 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Other privateUnited States--

Revision History  (Full details and data files)

  • Version 1.0: 2020-01-29
    Type: Initial release