3SBE

Crystal structure of RAC1 P29S mutant

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.296 
  • R-Value Work: 0.231 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history. 

Literature

Exome sequencing identifies recurrent somatic RAC1 mutations in melanoma.

Krauthammer, M., Kong, Y., Ha, B.H., Evans, P., Bacchiocchi, A., McCusker, J.P., Cheng, E., Davis, M.J., Goh, G., Choi, M., Ariyan, S., Narayan, D., Dutton-Regester, K., Capatana, A., Holman, E.C., Bosenberg, M., Sznol, M., Kluger, H.M., Brash, D.E., Stern, D.F., Materin, M.A., Lo, R.S., Mane, S., Ma, S., Kidd, K.K., Hayward, N.K., Lifton, R.P., Schlessinger, J., Boggon, T.J., Halaban, R.

(2012) Nat.Genet. 44: 1006-1014

  • DOI: 10.1038/ng.2359
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    • We characterized the mutational landscape of melanoma, the form of skin cancer with the highest mortality rate, by sequencing the exomes of 147 melanomas. Sun-exposed melanomas had markedly more ultraviolet (UV)-like C>T somatic mutations compared to ...

    We characterized the mutational landscape of melanoma, the form of skin cancer with the highest mortality rate, by sequencing the exomes of 147 melanomas. Sun-exposed melanomas had markedly more ultraviolet (UV)-like C>T somatic mutations compared to sun-shielded acral, mucosal and uveal melanomas. Among the newly identified cancer genes was PPP6C, encoding a serine/threonine phosphatase, which harbored mutations that clustered in the active site in 12% of sun-exposed melanomas, exclusively in tumors with mutations in BRAF or NRAS. Notably, we identified a recurrent UV-signature, an activating mutation in RAC1 in 9.2% of sun-exposed melanomas. This activating mutation, the third most frequent in our cohort of sun-exposed melanoma after those of BRAF and NRAS, changes Pro29 to serine (RAC1(P29S)) in the highly conserved switch I domain. Crystal structures, and biochemical and functional studies of RAC1(P29S) showed that the alteration releases the conformational restraint conferred by the conserved proline, causes an increased binding of the protein to downstream effectors, and promotes melanocyte proliferation and migration. These findings raise the possibility that pharmacological inhibition of downstream effectors of RAC1 signaling could be of therapeutic benefit.

    Organizational Affiliation: 

    Department of Pathology, Yale University School of Medicine, New Haven, Connecticut, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Ras-related C3 botulinum toxin substrate 1
A
187Homo sapiensMutation(s): 1 
Gene 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
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
GNP
Query on GNP
Download SDF File 
Download CCD File 
A
PHOSPHOAMINOPHOSPHONIC ACID-GUANYLATE ESTER
C10 H17 N6 O13 P3
UQABYHGXWYXDTK-UUOKFMHZSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.296 
  • R-Value Work: 0.231 
  • Space Group: P 2 21 21
Unit Cell:
Length (Å)Angle (°)
a = 40.593α = 90.00
b = 51.892β = 90.00
c = 99.327γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
CrystalCleardata collection
HKL-2000data reduction
HKL-2000data scaling
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots


View more in-depth experimental data

Entry History 

Deposition Data

  • Deposited Date: 2011-06-03 
  • Released Date: 2012-07-18 
  • Deposition Author(s): Ha, B.H., Boggon, T.J.

Revision History 

  • Version 1.0: 2012-07-18
    Type: Initial release
  • Version 1.1: 2012-08-29
    Type: Database references
  • Version 1.2: 2012-09-19
    Type: Database references