KRasG12C ligand complex

Experimental Data Snapshot

  • Resolution: 1.37 Å
  • R-Value Free: 0.231 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.186 

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Ligand Structure Quality Assessment 

This is version 1.1 of the entry. See complete history


Structure-Based Design and Pharmacokinetic Optimization of Covalent Allosteric Inhibitors of the Mutant GTPase KRASG12C.

Kettle, J.G.Bagal, S.K.Bickerton, S.Bodnarchuk, M.S.Breed, J.Carbajo, R.J.Cassar, D.J.Chakraborty, A.Cosulich, S.Cumming, I.Davies, M.Eatherton, A.Evans, L.Feron, L.Fillery, S.Gleave, E.S.Goldberg, F.W.Harlfinger, S.Hanson, L.Howard, M.Howells, R.Jackson, A.Kemmitt, P.Kingston, J.K.Lamont, S.Lewis, H.J.Li, S.Liu, L.Ogg, D.Phillips, C.Polanski, R.Robb, G.Robinson, D.Ross, S.Smith, J.M.Tonge, M.Whiteley, R.Yang, J.Zhang, L.Zhao, X.

(2020) J Med Chem 63: 4468-4483

  • DOI: https://doi.org/10.1021/acs.jmedchem.9b01720
  • Primary Citation of Related Structures:  
    6T5B, 6T5U, 6T5V

  • PubMed Abstract: 

    Attempts to directly drug the important oncogene KRAS have met with limited success despite numerous efforts across industry and academia. The KRAS G12C mutant represents an "Achilles heel" and has recently yielded to covalent targeting with small molecules that bind the mutant cysteine and create an allosteric pocket on GDP-bound RAS, locking it in an inactive state. A weak inhibitor at this site was optimized through conformational locking of a piperazine-quinazoline motif and linker modification. Subsequent introduction of a key methyl group to the piperazine resulted in enhancements in potency, permeability, clearance, and reactivity, leading to identification of a potent KRAS G12C inhibitor with high selectivity and excellent cross-species pharmacokinetic parameters and in vivo efficacy.

  • Organizational Affiliation

    Pharmaron Beijing Co., Ltd. 6 Taihe Road BDA, Beijing 100176 P. R. China.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
GTPase KRas170Homo sapiensMutation(s): 1 
UniProt & NIH Common Fund Data Resources
Find proteins for P01116 (Homo sapiens)
Explore P01116 
Go to UniProtKB:  P01116
PHAROS:  P01116
GTEx:  ENSG00000133703 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP01116
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.37 Å
  • R-Value Free: 0.231 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.186 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 32.973α = 65.49
b = 36.569β = 74.17
c = 37.129γ = 77.61
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
XDSdata reduction
Aimlessdata scaling

Structure Validation

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Ligand Structure Quality Assessment 

Entry History 

Deposition Data

  • Released Date: 2020-02-26 
  • Deposition Author(s): Phillips, C.

Revision History  (Full details and data files)

  • Version 1.0: 2020-02-26
    Type: Initial release
  • Version 1.1: 2020-05-27
    Changes: Database references