7PJM

Crystal Structure of Ivosidenib-resistant IDH1 variant R132C S280F in complex with NADPH and Ca2+/2-Oxoglutarate


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.210 
  • R-Value Work: 0.180 
  • R-Value Observed: 0.182 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

Resistance to the isocitrate dehydrogenase 1 mutant inhibitor ivosidenib can be overcome by alternative dimer-interface binding inhibitors.

Reinbold, R.Hvinden, I.C.Rabe, P.Herold, R.A.Finch, A.Wood, J.Morgan, M.Staudt, M.Clifton, I.J.Armstrong, F.A.McCullagh, J.S.O.Redmond, J.Bardella, C.Abboud, M.I.Schofield, C.J.

(2022) Nat Commun 13: 4785-4785

  • DOI: https://doi.org/10.1038/s41467-022-32436-4
  • Primary Citation of Related Structures:  
    7PJM, 7PJN

  • PubMed Abstract: 

    Ivosidenib, an inhibitor of isocitrate dehydrogenase 1 (IDH1) R132C and R132H variants, is approved for the treatment of acute myeloid leukaemia (AML). Resistance to ivosidenib due to a second site mutation of IDH1 R132C, leading to IDH1 R132C/S280F, has emerged. We describe biochemical, crystallographic, and cellular studies on the IDH1 R132C/S280F and R132H/S280F variants that inform on the mechanism of second-site resistance, which involves both modulation of inhibitor binding at the IDH1 dimer-interface and alteration of kinetic properties, which enable more efficient 2-HG production relative to IDH1 R132C and IDH1 R132H. Importantly, the biochemical and cellular results demonstrate that it should be possible to overcome S280F mediated resistance in AML patients by using alternative inhibitors, including some presently in phase 2 clinical trials.


  • Organizational Affiliation

    Chemistry Research Laboratory, Department of Chemistry and the Ineos Oxford Institute for Antimicrobial Research, University of Oxford, 12 Mansfield, Oxford, OX1 3TA, UK.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Isocitrate dehydrogenase [NADP] cytoplasmic
A, B, C
422Homo sapiensMutation(s): 2 
Gene Names: IDH1PICD
EC: 1.1.1.42
UniProt & NIH Common Fund Data Resources
Find proteins for O75874 (Homo sapiens)
Explore O75874 
Go to UniProtKB:  O75874
PHAROS:  O75874
GTEx:  ENSG00000138413 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO75874
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 5 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
NDP (Subject of Investigation/LOI)
Query on NDP

Download Ideal Coordinates CCD File 
G [auth A],
L [auth B],
R [auth C]
NADPH DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE
C21 H30 N7 O17 P3
ACFIXJIJDZMPPO-NNYOXOHSSA-N
AKG (Subject of Investigation/LOI)
Query on AKG

Download Ideal Coordinates CCD File 
D [auth A],
K [auth B],
P [auth C]
2-OXOGLUTARIC ACID
C5 H6 O5
KPGXRSRHYNQIFN-UHFFFAOYSA-N
GOL
Query on GOL

Download Ideal Coordinates CCD File 
E [auth A],
F [auth A],
N [auth C],
Q [auth C]
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
CA (Subject of Investigation/LOI)
Query on CA

Download Ideal Coordinates CCD File 
H [auth A],
J [auth B],
O [auth C]
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
CL
Query on CL

Download Ideal Coordinates CCD File 
I [auth A],
M [auth B],
S [auth C]
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.210 
  • R-Value Work: 0.180 
  • R-Value Observed: 0.182 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 96.58α = 90
b = 273.01β = 90
c = 117.42γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
Aimlessdata scaling
PDB_EXTRACTdata extraction
xia2data reduction
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Wellcome TrustUnited Kingdom106244/Z/14/Z
Biotechnology and Biological Sciences Research Council (BBSRC)United KingdomBB/R506655/1

Revision History  (Full details and data files)

  • Version 1.0: 2022-07-13
    Type: Initial release
  • Version 1.1: 2022-10-19
    Changes: Database references
  • Version 1.2: 2024-01-31
    Changes: Data collection, Refinement description