6XT9

Subunits BBS 1,4,8,9,18 of the human BBSome complex


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.80 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structure of the human BBSome core complex.

Klink, B.U.Gatsogiannis, C.Hofnagel, O.Wittinghofer, A.Raunser, S.

(2020) Elife 9

  • DOI: 10.7554/eLife.53910
  • Primary Citation of Related Structures:  
    6XT9, 6XTB

  • PubMed Abstract: 
  • The BBSome is a heterooctameric protein complex that plays a central role in primary cilia homeostasis. Its malfunction causes the severe ciliopathy Bardet-Biedl syndrome (BBS). The complex acts as a cargo adapter that recognizes signaling proteins such as GPCRs and links them to the intraflagellar transport machinery ...

    The BBSome is a heterooctameric protein complex that plays a central role in primary cilia homeostasis. Its malfunction causes the severe ciliopathy Bardet-Biedl syndrome (BBS). The complex acts as a cargo adapter that recognizes signaling proteins such as GPCRs and links them to the intraflagellar transport machinery. The underlying mechanism is poorly understood. Here we present a high-resolution cryo-EM structure of a human heterohexameric core subcomplex of the BBSome. The structure reveals the architecture of the complex in atomic detail. It explains how the subunits interact with each other and how disease-causing mutations hamper this interaction. The complex adopts a conformation that is open for binding to membrane-associated GTPase Arl6 and a large positively charged patch likely strengthens the interaction with the membrane. A prominent negatively charged cleft at the center of the complex is likely involved in binding of positively charged signaling sequences of cargo proteins.


    Organizational Affiliation

    Department of Structural Biochemistry, Max Planck Institute of Molecular Physiology, Dortmund, Germany.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Bardet-Biedl syndrome 1 proteinA593Homo sapiensMutation(s): 0 
Gene Names: BBS1BBS2L2
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Find proteins for Q8NFJ9 (Homo sapiens)
Explore Q8NFJ9 
Go to UniProtKB:  Q8NFJ9
PHAROS:  Q8NFJ9
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UniProt GroupQ8NFJ9
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Bardet-Biedl syndrome 4 proteinB [auth D]528Homo sapiensMutation(s): 0 
Gene Names: BBS4
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Find proteins for Q96RK4 (Homo sapiens)
Explore Q96RK4 
Go to UniProtKB:  Q96RK4
PHAROS:  Q96RK4
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UniProt GroupQ96RK4
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Tetratricopeptide repeat domain 8 isoform 2C [auth H]517Homo sapiensMutation(s): 0 
Gene Names: TTC8
UniProt
Find proteins for A0A0C4DGY3 (Homo sapiens)
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UniProt GroupA0A0C4DGY3
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Protein PTHB1D [auth I]887Homo sapiensMutation(s): 0 
Gene Names: BBS9PTHB1
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Find proteins for Q3SYG4 (Homo sapiens)
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PHAROS:  Q3SYG4
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
BBSome-interacting protein 1E [auth J]139Homo sapiensMutation(s): 0 
Gene Names: BBIP1BBIP10NCRNA00081
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Find proteins for A8MTZ0 (Homo sapiens)
Explore A8MTZ0 
Go to UniProtKB:  A8MTZ0
PHAROS:  A8MTZ0
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UniProt GroupA8MTZ0
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Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.80 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Max Planck SocietyGermany--

Revision History  (Full details and data files)

  • Version 1.0: 2020-01-29
    Type: Initial release
  • Version 1.1: 2020-07-29
    Changes: Data collection