7AJK

Crystal structure of CRYI-B Rac1 complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.10 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.249 

Starting Model: experimental
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This is version 1.2 of the entry. See complete history


Literature

Structural Basis of CYRI-B Direct Competition with Scar/WAVE Complex for Rac1.

Yelland, T.Le, A.H.Nikolaou, S.Insall, R.Machesky, L.Ismail, S.

(2021) Structure 29: 226-237.e4

  • DOI: https://doi.org/10.1016/j.str.2020.11.003
  • Primary Citation of Related Structures:  
    7AJK, 7AJL

  • PubMed Abstract: 

    Rac1 is a major regulator of actin dynamics, with GTP-bound Rac1 promoting actin assembly via the Scar/WAVE complex. CYRI competes with Scar/WAVE for interaction with Rac1 in a feedback loop regulating actin dynamics. Here, we reveal the nature of the CYRI-Rac1 interaction, through crystal structures of CYRI-B lacking the N-terminal helix (CYRI-BΔN) and the CYRI-BΔN:Rac1Q61L complex, providing the molecular basis for CYRI-B regulation of the Scar/WAVE complex. We reveal CYRI-B as having two subdomains - an N-terminal Rac1 binding subdomain with a unique Rac1-effector interface and a C-terminal Ratchet subdomain that undergoes conformational changes induced by Rac1 binding. Finally, we show that the CYRI protein family, CYRI-A and CYRI-B can produce an autoinhibited hetero- or homodimers, adding an additional layer of regulation to Rac1 signaling.


  • Organizational Affiliation

    CRUK- Beatson Institute, Glasgow G61 1BD, UK.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Ras-related C3 botulinum toxin substrate 1A [auth BBB]180Homo sapiensMutation(s): 0 
Gene Names: RAC1TC25MIG5
EC: 3.6.5.2
UniProt & NIH Common Fund Data Resources
Find proteins for P63000 (Homo sapiens)
Explore P63000 
Go to UniProtKB:  P63000
PHAROS:  P63000
GTEx:  ENSG00000136238 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP63000
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
CYFIP-related Rac1 interactor BB [auth CCC]325Homo sapiensMutation(s): 0 
Gene Names: CYRIBCYRIFAM49BBM-009
UniProt & NIH Common Fund Data Resources
Find proteins for Q9NUQ9 (Homo sapiens)
Explore Q9NUQ9 
Go to UniProtKB:  Q9NUQ9
PHAROS:  Q9NUQ9
GTEx:  ENSG00000153310 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9NUQ9
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
GNP (Subject of Investigation/LOI)
Query on GNP

Download Ideal Coordinates CCD File 
D [auth BBB]PHOSPHOAMINOPHOSPHONIC ACID-GUANYLATE ESTER
C10 H17 N6 O13 P3
UQABYHGXWYXDTK-UUOKFMHZSA-N
MG
Query on MG

Download Ideal Coordinates CCD File 
C [auth BBB]MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.10 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.249 
  • Space Group: P 62 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 81.87α = 90
b = 81.87β = 90
c = 355.87γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
DIALSdata reduction
DIALSdata scaling
MOLREPphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Cancer Research UK--

Revision History  (Full details and data files)

  • Version 1.0: 2020-11-18
    Type: Initial release
  • Version 1.1: 2021-06-02
    Changes: Data collection, Database references
  • Version 1.2: 2024-01-31
    Changes: Advisory, Data collection, Database references, Derived calculations, Refinement description