7AJL

Cyrstal structure of CYRI-B/Fam49B


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.37 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.203 

wwPDB Validation   3D Report Full Report


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
CYFIP-related Rac1 interactor BA [auth AAA],
B [auth BBB]
299Mus musculusMutation(s): 0 
Gene Names: CyribCyriFam49b
UniProt & NIH Common Fund Data Resources
Find proteins for Q921M7 (Mus musculus)
Explore Q921M7 
Go to UniProtKB:  Q921M7
IMPC:  MGI:1923520
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ921M7
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
MSE
Query on MSE
A [auth AAA],
B [auth BBB]
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.37 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.203 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 44.731α = 90
b = 166.686β = 112.343
c = 45.131γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
DIALSdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



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: Database references
  • Version 1.2: 2024-10-16
    Changes: Data collection, Database references, Derived calculations, Structure summary