Aurora A ligand complex

Experimental Data Snapshot

  • Resolution: 1.73 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.185 

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Aurora A Kinase Inhibition Is Synthetic Lethal with Loss of theRB1Tumor Suppressor Gene.

Gong, X.Du, J.Parsons, S.H.Merzoug, F.F.Webster, Y.Iversen, P.W.Chio, L.C.Van Horn, R.D.Lin, X.Blosser, W.Han, B.Jin, S.Yao, S.Bian, H.Ficklin, C.Fan, L.Kapoor, A.Antonysamy, S.Mc Nulty, A.M.Froning, K.Manglicmot, D.Pustilnik, A.Weichert, K.Wasserman, S.R.Dowless, M.Marugan, C.Baquero, C.Lallena, M.J.Eastman, S.W.Hui, Y.H.Dieter, M.Z.Doman, T.Chu, S.Qian, H.R.Ye, X.S.Barda, D.A.Plowman, G.D.Reinhard, C.Campbell, R.M.Henry, J.R.Buchanan, S.G.

(2019) Cancer Discov 9: 248-263

  • DOI: https://doi.org/10.1158/2159-8290.CD-18-0469
  • Primary Citation of Related Structures:  
    6C2R, 6C2T

  • PubMed Abstract: 

    Loss-of-function mutations in the retinoblastoma gene RB1 are common in several treatment-refractory cancers such as small-cell lung cancer and triple-negative breast cancer. To identify drugs synthetic lethal with RB1 mutation ( RB1 mut ), we tested 36 cell-cycle inhibitors using a cancer cell panel profiling approach optimized to discern cytotoxic from cytostatic effects. Inhibitors of the Aurora kinases AURKA and AURKB showed the strongest RB1 association in this assay. LY3295668, an AURKA inhibitor with over 1,000-fold selectivity versus AURKB, is distinguished by minimal toxicity to bone marrow cells at concentrations active against RB1 mut cancer cells and leads to durable regression of RB1 mut tumor xenografts at exposures that are well tolerated in rodents. Genetic suppression screens identified enforcers of the spindle-assembly checkpoint (SAC) as essential for LY3295668 cytotoxicity in RB1-deficient cancers and suggest a model in which a primed SAC creates a unique dependency on AURKA for mitotic exit and survival. SIGNIFICANCE: The identification of a synthetic lethal interaction between RB1 and AURKA inhibition, and the discovery of a drug that can be dosed continuously to achieve uninterrupted inhibition of AURKA kinase activity without myelosuppression, suggest a new approach for the treatment of RB1-deficient malignancies, including patients progressing on CDK4/6 inhibitors. See related commentary by Dick and Li, p. 169 . This article is highlighted in the In This Issue feature, p. 151 .

  • Organizational Affiliation

    Eli Lilly and Company, Discovery Chemistry Research and Technologies, Lilly Biotechnology Center, San Diego, California.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Aurora kinase A272Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for O14965 (Homo sapiens)
Explore O14965 
Go to UniProtKB:  O14965
GTEx:  ENSG00000087586 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO14965
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on EGJ

Download Ideal Coordinates CCD File 
B [auth A](2S,4R)-1-[(3-chloro-2-fluorophenyl)methyl]-2-methyl-4-({3-[(1,3-thiazol-2-yl)amino]isoquinolin-1-yl}methyl)piperidine-4-carboxylic acid
C27 H26 Cl F N4 O2 S
Query on SO4

Download Ideal Coordinates CCD File 
O4 S
Query on DMS

Download Ideal Coordinates CCD File 
C2 H6 O S
Experimental Data & Validation

Experimental Data

  • Resolution: 1.73 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.185 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 83.487α = 90
b = 83.487β = 90
c = 74.766γ = 90
Software Package:
Software NamePurpose
SCALAdata scaling
PDB_EXTRACTdata extraction
MOSFLMdata reduction

Structure Validation

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Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2019-01-23
    Type: Initial release
  • Version 1.1: 2019-02-20
    Changes: Data collection, Database references