6OB2

Crystal structure of wild-type KRAS (GMPPNP-bound) in complex with GAP-related domain (GRD) of neurofibromin (NF1)

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.85 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.199 
  • R-Value Observed: 0.202 

wwPDB Validation   3D Report Full Report


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


Literature

KRAS G13D sensitivity to neurofibromin-mediated GTP hydrolysis.

Rabara, D., Tran, T.H., Dharmaiah, S., Stephens, R.M., McCormick, F., Simanshu, D.K., Holderfield, M.

(2019) Proc Natl Acad Sci U S A 116: 22122-22131

  • DOI: 10.1073/pnas.1908353116
  • Primary Citation of Related Structures:  
    6OB2, 6OB3

  • PubMed Abstract: 

    • KRAS mutations occur in ∼35% of colorectal cancers and promote tumor growth by constitutively activating the mitogen-activated protein kinase (MAPK) pathway. KRAS mutations at codons 12, 13, or 61 are thought to prevent GAP protein-stimulated GTP hydrolysis and render KRAS -mutated colorectal cancers unresponsive to epidermal growth factor receptor (EGFR) inhibitors ...

    KRAS mutations occur in ∼35% of colorectal cancers and promote tumor growth by constitutively activating the mitogen-activated protein kinase (MAPK) pathway. KRAS mutations at codons 12, 13, or 61 are thought to prevent GAP protein-stimulated GTP hydrolysis and render KRAS -mutated colorectal cancers unresponsive to epidermal growth factor receptor (EGFR) inhibitors. We report here that KRAS G13-mutated cancer cells are frequently comutated with NF1 GAP but NF1 is rarely mutated in cancers with KRAS codon 12 or 61 mutations. Neurofibromin protein (encoded by the NF1 gene) hydrolyzes GTP directly in complex with KRAS G13D, and KRAS G13D-mutated cells can respond to EGFR inhibitors in a neurofibromin-dependent manner. Structures of the wild type and G13D mutant of KRAS in complex with neurofibromin (RasGAP domain) provide the structural basis for neurofibromin-mediated GTP hydrolysis. These results reveal that KRAS G13D is responsive to neurofibromin-stimulated hydrolysis and suggest that a subset of KRAS G13-mutated colorectal cancers that are neurofibromin-competent may respond to EGFR therapies.

    Organizational Affiliation: 

    NCI RAS Initiative, Cancer Research Technology Program, Frederick National Laboratory for Cancer Research, Frederick, MD 21701; frank.mccormick@ucsf.edu dhirendra.simanshu@nih.gov matthew.holderfield@quantatx.com.



Macromolecules
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
GTPase KRasA, C170Homo sapiensMutation(s): 0 
Gene Names: KRAS, KRAS2, RASK2
EC: 3.6.5.2
Find proteins for P01116 (Homo sapiens)
Explore P01116 
Go to UniProtKB:  P01116
NIH Common Fund Data Resources
PHAROS:  P01116
GTEx:  ENSG00000133703
Protein Feature View
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  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
NeurofibrominB, D256Homo sapiensMutation(s): 0 
Gene Names: NF1
Find proteins for P21359 (Homo sapiens)
Explore P21359 
Go to UniProtKB:  P21359
NIH Common Fund Data Resources
PHAROS:  P21359
GTEx:  ENSG00000196712
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GNP
Query on GNP
Download Ideal Coordinates CCD File 
 F [auth A], K [auth C]PHOSPHOAMINOPHOSPHONIC ACID-GUANYLATE ESTER
C10 H17 N6 O13 P3
UQABYHGXWYXDTK-UUOKFMHZSA-N		 Ligand Interaction
GOL
Query on GOL
Download Ideal Coordinates CCD File 
 E [auth A], H [auth B]GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N		 Ligand Interaction
IMD
Query on IMD
Download Ideal Coordinates CCD File 
 I [auth B]IMIDAZOLE
C3 H5 N2
RAXXELZNTBOGNW-UHFFFAOYSA-O		 Ligand Interaction
CL
Query on CL
Download Ideal Coordinates CCD File 
 J [auth B]CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M		 Ligand Interaction
MG
Query on MG
Download Ideal Coordinates CCD File 
 G [auth A], L [auth C]MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.85 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.199 
  • R-Value Observed: 0.202 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 83.728α = 90
b = 99.736β = 90
c = 155.514γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
XSCALEdata scaling
PHASERphasing
PHENIXrefinement
PDB_EXTRACTdata extraction

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2019-10-16
    Type: Initial release
  • Version 1.1: 2019-10-30
    Changes: Data collection, Database references
  • Version 1.2: 2019-11-13
    Changes: Data collection, Database references