5AP5

Naturally Occurring Mutations in the MPS1 Gene Predispose Cells to Kinase Inhibitor Drug Resistance.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.203 
  • R-Value Observed: 0.205 

Starting Model: experimental
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Ligand Structure Quality Assessment 


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Literature

Naturally Occurring Mutations in the Mps1 Gene Predispose Cells to Kinase Inhibitor Drug Resistance.

Gurden, M.D.Westwood, I.M.Faisal, A.Naud, S.Cheung, K.J.Mcandrew, C.Wood, A.Schmitt, J.Boxall, K.Mak, G.Workman, P.Burke, R.Hoelder, S.Blagg, J.Van Montfort, R.L.M.Linardopoulos, S.

(2015) Cancer Res 75: 3340

  • DOI: https://doi.org/10.1158/0008-5472.CAN-14-3272
  • Primary Citation of Related Structures:  
    5AP0, 5AP1, 5AP2, 5AP3, 5AP4, 5AP5, 5AP6, 5AP7

  • PubMed Abstract: 

    Acquired resistance to therapy is perhaps the greatest challenge to effective clinical management of cancer. With several inhibitors of the mitotic checkpoint kinase MPS1 in preclinical development, we sought to investigate how resistance against these inhibitors may arise so that mitigation or bypass strategies could be addressed as early as possible. Toward this end, we modeled acquired resistance to the MPS1 inhibitors AZ3146, NMS-P715, and CCT251455, identifying five point mutations in the kinase domain of MPS1 that confer resistance against multiple inhibitors. Structural studies showed how the MPS1 mutants conferred resistance by causing steric hindrance to inhibitor binding. Notably, we show that these mutations occur in nontreated cancer cell lines and primary tumor specimens, and that they also preexist in normal lymphoblast and breast tissues. In a parallel piece of work, we also show that the EGFR p.T790M mutation, the most common mutation conferring resistance to the EGFR inhibitor gefitinib, also preexists in cancer cells and normal tissue. Our results therefore suggest that mutations conferring resistance to targeted therapy occur naturally in normal and malignant cells and these mutations do not arise as a result of the increased mutagenic plasticity of cancer cells.


  • Organizational Affiliation

    Breakthrough Breast Cancer Research Centre, Division of Breast Cancer Research, The Institute of Cancer Research, London, United Kingdom.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
DUAL SPECIFICITY PROTEIN KINASE TTK313Homo sapiensMutation(s): 1 
EC: 2.7.12.1
UniProt & NIH Common Fund Data Resources
Find proteins for P33981 (Homo sapiens)
Explore P33981 
Go to UniProtKB:  P33981
PHAROS:  P33981
GTEx:  ENSG00000112742 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP33981
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
7RO
Query on 7RO

Download Ideal Coordinates CCD File 
B [auth A]tert-butyl 6-((2-chloro-4-(dimethylcarbamoyl)phenyl)amino)-2-(1-methyl-1H-pyrazol-4-yl)-1H-pyrrolo[3,2-c]pyridine-1-carboxylate
C25 H27 Cl N6 O3
KYBALIQJYSWGLI-UHFFFAOYSA-N
PGE
Query on PGE

Download Ideal Coordinates CCD File 
D [auth A]TRIETHYLENE GLYCOL
C6 H14 O4
ZIBGPFATKBEMQZ-UHFFFAOYSA-N
1KA
Query on 1KA

Download Ideal Coordinates CCD File 
C [auth A](2-hydroxyethoxy)acetaldehyde
C4 H8 O3
DSGGHBUAHUMMHN-UHFFFAOYSA-N
EDO
Query on EDO

Download Ideal Coordinates CCD File 
E [auth A],
F [auth A]
1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
Binding Affinity Annotations 
IDSourceBinding Affinity
7RO BindingDB:  5AP5 IC50: min: 6, max: 600 (nM) from 2 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.203 
  • R-Value Observed: 0.205 
  • Space Group: I 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 70.32α = 90
b = 112.17β = 90
c = 113.18γ = 90
Software Package:
Software NamePurpose
BUSTERrefinement
MOSFLMdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Revision History  (Full details and data files)

  • Version 1.0: 2015-09-23
    Type: Initial release
  • Version 1.1: 2024-01-10
    Changes: Data collection, Database references, Derived calculations, Other, Refinement description