6H4O

Crystal structure of human KDM4A in complex with compound 18a


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.25 Å
  • R-Value Free: 0.203 
  • R-Value Work: 0.169 
  • R-Value Observed: 0.171 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

C8-substituted pyrido[3,4-d]pyrimidin-4(3H)-ones: Studies towards the identification of potent, cell penetrant Jumonji C domain containing histone lysine demethylase 4 subfamily (KDM4) inhibitors, compound profiling in cell-based target engagement assays.

Le Bihan, Y.V.Lanigan, R.M.Atrash, B.McLaughlin, M.G.Velupillai, S.Malcolm, A.G.England, K.S.Ruda, G.F.Mok, N.Y.Tumber, A.Tomlin, K.Saville, H.Shehu, E.McAndrew, C.Carmichael, L.Bennett, J.M.Jeganathan, F.Eve, P.Donovan, A.Hayes, A.Wood, F.Raynaud, F.I.Fedorov, O.Brennan, P.E.Burke, R.van Montfort, R.L.M.Rossanese, O.W.Blagg, J.Bavetsias, V.

(2019) Eur J Med Chem 177: 316-337

  • DOI: https://doi.org/10.1016/j.ejmech.2019.05.041
  • Primary Citation of Related Structures:  
    6H4O, 6H4P, 6H4Q, 6H4R, 6H4S, 6H4T, 6H4U, 6H4V, 6H4W, 6H4X, 6H4Y, 6H4Z, 6H50, 6H51, 6H52

  • PubMed Abstract: 

    Residues in the histone substrate binding sites that differ between the KDM4 and KDM5 subfamilies were identified. Subsequently, a C8-substituted pyrido[3,4-d]pyrimidin-4(3H)-one series was designed to rationally exploit these residue differences between the histone substrate binding sites in order to improve affinity for the KDM4-subfamily over KDM5-subfamily enzymes. In particular, residues E169 and V313 (KDM4A numbering) were targeted. Additionally, conformational restriction of the flexible pyridopyrimidinone C8-substituent was investigated. These approaches yielded potent and cell-penetrant dual KDM4/5-subfamily inhibitors including 19a (KDM4A and KDM5B Ki = 0.004 and 0.007 μM, respectively). Compound cellular profiling in two orthogonal target engagement assays revealed a significant reduction from biochemical to cell-based activity across multiple analogues; this decrease was shown to be consistent with 2OG competition, and suggests that sub-nanomolar biochemical potency will be required with C8-substituted pyrido[3,4-d]pyrimidin-4(3H)-one compounds to achieve sub-micromolar target inhibition in cells.


  • Organizational Affiliation

    Cancer Research UK Cancer Therapeutics Unit, The Institute of Cancer Research, London, UK.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Lysine-specific demethylase 4A
A, B, C, D
360Homo sapiensMutation(s): 0 
Gene Names: KDM4AJHDM3AJMJD2JMJD2AKIAA0677
EC: 1.14.11
UniProt & NIH Common Fund Data Resources
Find proteins for O75164 (Homo sapiens)
Explore O75164 
Go to UniProtKB:  O75164
PHAROS:  O75164
GTEx:  ENSG00000066135 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO75164
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 5 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
FQH
Query on FQH

Download Ideal Coordinates CCD File 
G [auth A],
L [auth B],
P [auth C],
V [auth D]
8-[4-[2-[4-[3-(trifluoromethyl)phenyl]piperidin-1-yl]ethyl]pyrazol-1-yl]-3~{H}-pyrido[3,4-d]pyrimidin-4-one
C24 H23 F3 N6 O
ZBLHURFMYIWFIY-UHFFFAOYSA-N
GOL
Query on GOL

Download Ideal Coordinates CCD File 
H [auth A],
M [auth B]
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
DMS
Query on DMS

Download Ideal Coordinates CCD File 
Q [auth C],
R [auth C],
W [auth D]
DIMETHYL SULFOXIDE
C2 H6 O S
IAZDPXIOMUYVGZ-UHFFFAOYSA-N
ZN
Query on ZN

Download Ideal Coordinates CCD File 
E [auth A]
F [auth A]
J [auth B]
K [auth B]
N [auth C]
E [auth A],
F [auth A],
J [auth B],
K [auth B],
N [auth C],
O [auth C],
T [auth D],
U [auth D]
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
CL
Query on CL

Download Ideal Coordinates CCD File 
I [auth A],
S [auth C]
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
Binding Affinity Annotations 
IDSourceBinding Affinity
FQH Binding MOAD:  6H4O IC50: 128 (nM) from 1 assay(s)
BindingDB:  6H4O IC50: 128 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.25 Å
  • R-Value Free: 0.203 
  • R-Value Work: 0.169 
  • R-Value Observed: 0.171 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 57.516α = 90
b = 101.374β = 99.5
c = 142.544γ = 90
Software Package:
Software NamePurpose
BUSTERrefinement
XDSdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Cancer Research UKUnited KingdomC309/A11566

Revision History  (Full details and data files)

  • Version 1.0: 2019-06-12
    Type: Initial release
  • Version 1.1: 2024-01-17
    Changes: Data collection, Database references, Derived calculations, Refinement description