4GZM

Crystal structure of RAC1 F28L mutant


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.254 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

RAC1P29S is a spontaneously activating cancer-associated GTPase.

Davis, M.J.Ha, B.H.Holman, E.C.Halaban, R.Schlessinger, J.Boggon, T.J.

(2013) Proc.Natl.Acad.Sci.USA 110: 912-917

  • DOI: 10.1073/pnas.1220895110
  • Primary Citation of Related Structures:  4GZL

  • PubMed Abstract: 
  • RAC1 is a small, Ras-related GTPase that was recently reported to harbor a recurrent UV-induced signature mutation in melanoma, resulting in substitution of P29 to serine (RAC1(P29S)), ranking this the third most frequently occurring gain-of-function ...

    RAC1 is a small, Ras-related GTPase that was recently reported to harbor a recurrent UV-induced signature mutation in melanoma, resulting in substitution of P29 to serine (RAC1(P29S)), ranking this the third most frequently occurring gain-of-function mutation in melanoma. Although the Ras family GTPases are mutated in about 30% of all cancers, mutations in the Rho family GTPases have rarely been observed. In this study, we demonstrate that unlike oncogenic Ras proteins, which are primarily activated by mutations that eliminate GTPase activity, the activated melanoma RAC1(P29S) protein maintains intrinsic GTP hydrolysis and is spontaneously activated by substantially increased inherent GDP/GTP nucleotide exchange. Determination and comparison of crystal structures for activated RAC1 GTPases suggest that RAC1(F28L)--a known spontaneously activated RAC1 mutant--and RAC1(P29S) are self-activated in distinct fashions. Moreover, the mechanism of RAC1(P29S) and RAC1(F28L) activation differs from the common oncogenic mutations found in Ras-like GTPases that abrogate GTP hydrolysis. The melanoma RAC1(P29S) gain-of-function point mutation therefore represents a previously undescribed class of cancer-related GTPase activity.


    Organizational Affiliation

    Department of Pharmacology, Yale University School of Medicine, New Haven, CT 06520, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Ras-related C3 botulinum toxin substrate 1
A, B
204Homo sapiensGene Names: RAC1 (TC25)
Find proteins for P63000 (Homo sapiens)
Go to Gene View: RAC1
Go to UniProtKB:  P63000
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MG
Query on MG

Download SDF File 
Download CCD File 
A, B
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
GSP
Query on GSP

Download SDF File 
Download CCD File 
A, B
5'-GUANOSINE-DIPHOSPHATE-MONOTHIOPHOSPHATE
C10 H16 N5 O13 P3 S
XOFLBQFBSOEHOG-UUOKFMHZSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.254 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 40.094α = 90.00
b = 98.807β = 90.21
c = 51.994γ = 90.00
Software Package:
Software NamePurpose
Executordata collection
PHASERphasing
REFMACrefinement
HKL-2000data scaling
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2012-09-06 
  • Released Date: 2012-12-12 
  • Deposition Author(s): Ha, B.H., Boggon, T.J.

Revision History 

  • Version 1.0: 2012-12-12
    Type: Initial release
  • Version 1.1: 2013-01-16
    Type: Database references
  • Version 1.2: 2013-01-30
    Type: Database references