FGFR4 complex with N-(3-chloro-2-((5-((2,6-dichloro-3,5-dimethoxybenzyl)oxy)pyrimidin-2-yl)amino)-5-fluorophenyl)acrylamide

Experimental Data Snapshot

  • Resolution: 2.12 Å
  • R-Value Free: 0.281 
  • R-Value Work: 0.242 
  • R-Value Observed: 0.244 

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This is version 1.2 of the entry. See complete history


Rotational Freedom, Steric Hindrance, and Protein Dynamics Explain BLU554 Selectivity for the Hinge Cysteine of FGFR4.

Lin, X.Yosaatmadja, Y.Kalyukina, M.Middleditch, M.J.Zhang, Z.Lu, X.Ding, K.Patterson, A.V.Smaill, J.B.Squire, C.J.

(2019) ACS Med Chem Lett 10: 1180-1186

  • DOI: https://doi.org/10.1021/acsmedchemlett.9b00196
  • Primary Citation of Related Structures:  
    6NVG, 6NVH, 6NVI, 6NVJ, 6NVK, 6NVL

  • PubMed Abstract: 

    Aberration in FGFR4 signaling drives carcinogenesis and progression in a subset of hepatocellular carcinoma (HCC) patients, thereby making FGFR4 an attractive molecular target for this disease. Selective FGFR4 inhibition can be achieved through covalently targeting a poorly conserved cysteine residue in the FGFR4 kinase domain. We report mass spectrometry assays and cocrystal structures of FGFR4 in covalent complex with the clinical candidate BLU554 and with a series of four structurally related inhibitors that define the inherent reactivity and selectivity profile of these molecules. We further reveal the structure of FGFR1 with one of our inhibitors and show that off-target covalent binding can occur through an alternative conformation that supports targeting of a cysteine conserved in all members of the FGFR family. Collectively, we propose that rotational freedom, steric hindrance, and protein dynamics explain the exceptional selectivity profile of BLU554 for targeting FGFR4.

  • Organizational Affiliation

    School of Biological Sciences, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Fibroblast growth factor receptor 4300Homo sapiensMutation(s): 0 
Gene Names: FGFR4JTK2TKF
UniProt & NIH Common Fund Data Resources
Find proteins for P22455 (Homo sapiens)
Explore P22455 
Go to UniProtKB:  P22455
PHAROS:  P22455
GTEx:  ENSG00000160867 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP22455
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on XL7

Download Ideal Coordinates CCD File 
B [auth A]N-[3-chloro-2-({5-[(2,6-dichloro-3,5-dimethoxyphenyl)methoxy]pyrimidin-2-yl}amino)-5-fluorophenyl]propanamide
C22 H20 Cl3 F N4 O4
Query on SO4

Download Ideal Coordinates CCD File 
O4 S
Experimental Data & Validation

Experimental Data

  • Resolution: 2.12 Å
  • R-Value Free: 0.281 
  • R-Value Work: 0.242 
  • R-Value Observed: 0.244 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 63.74α = 90
b = 63.74β = 90
c = 182.26γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
Aimlessdata scaling

Structure Validation

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Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2019-07-10
    Type: Initial release
  • Version 1.1: 2019-08-28
    Changes: Data collection, Database references
  • Version 1.2: 2023-10-11
    Changes: Data collection, Database references, Refinement description