7Q1E

CPAP:TUBULIN:IIH5 ALPHAREP COMPLEX


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.200 
  • R-Value Observed: 0.203 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

Structural convergence for tubulin binding of CPAP and vinca domain microtubule inhibitors.

Campanacci, V.Urvoas, A.Ammar Khodja, L.Aumont-Nicaise, M.Noiray, M.Lachkar, S.Curmi, P.A.Minard, P.Gigant, B.

(2022) Proc Natl Acad Sci U S A 119: e2120098119-e2120098119

  • DOI: https://doi.org/10.1073/pnas.2120098119
  • Primary Citation of Related Structures:  
    7Q1E, 7Q1F, 7Z0F, 7Z0G

  • PubMed Abstract: 

    Microtubule dynamics is regulated by various cellular proteins and perturbed by small-molecule compounds. To what extent the mechanism of the former resembles that of the latter is an open question. We report here structures of tubulin bound to the PN2-3 domain of CPAP, a protein controlling the length of the centrioles. We show that an α-helix of the PN2-3 N-terminal region binds and caps the longitudinal surface of the tubulin β subunit. Moreover, a PN2-3 N-terminal stretch lies in a β-tubulin site also targeted by fungal and bacterial peptide-like inhibitors of the vinca domain, sharing a very similar binding mode with these compounds. Therefore, our results identify several characteristic features of cellular partners that bind to this site and highlight a structural convergence of CPAP with small-molecule inhibitors of microtubule assembly.


  • Organizational Affiliation

    Université Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), 91198, Gif-sur-Yvette, France.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Tubulin alpha chain451Ovis ariesMutation(s): 0 
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Tubulin beta chain445Ovis ariesMutation(s): 0 
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  • Reference Sequence
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
iiH5 ALPHAREP
C, D
170synthetic constructMutation(s): 0 
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
Centromere protein JE [auth P]79Homo sapiensMutation(s): 2 
Gene Names: CENPJCPAPLAPLIP1
UniProt & NIH Common Fund Data Resources
Find proteins for Q9HC77 (Homo sapiens)
Explore Q9HC77 
Go to UniProtKB:  Q9HC77
PHAROS:  Q9HC77
GTEx:  ENSG00000151849 
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UniProt GroupQ9HC77
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.200 
  • R-Value Observed: 0.203 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 53.59α = 90
b = 68.05β = 90
c = 420.92γ = 90
Software Package:
Software NamePurpose
BUSTERrefinement
XDSdata reduction
XSCALEdata scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Fondation ARCFrance--
Centre National de la Recherche Scientifique (CNRS)France--

Revision History  (Full details and data files)

  • Version 1.0: 2022-04-13
    Type: Initial release
  • Version 1.1: 2022-05-18
    Changes: Database references
  • Version 1.2: 2024-01-31
    Changes: Data collection, Refinement description