6GI6

Crystal structure of the ACVR1 (ALK2) kinase in complex with a Quinazolinone based ALK2 inhibitor with a 5-methyl core.

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.98 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.213 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.3 of the entry. See complete history. 


Literature

Novel Quinazolinone Inhibitors of ALK2 Flip between Alternate Binding Modes: Structure-Activity Relationship, Structural Characterization, Kinase Profiling, and Cellular Proof of Concept.

Hudson, L., Mui, J., Vazquez, S., Carvalho, D.M., Williams, E., Jones, C., Bullock, A.N., Hoelder, S.

(2018) J Med Chem 61: 7261-7272

  • DOI: https://doi.org/10.1021/acs.jmedchem.8b00782
  • Primary Citation of Related Structures:  
    6GI6, 6GIN, 6GIP

  • PubMed Abstract: 

    Structure-activity relationship and crystallographic data revealed that quinazolinone-containing fragments flip between two distinct modes of binding to activin receptor-like kinase-2 (ALK2). We explored both binding modes to discover potent inhibitors and characterized the chemical modifications that triggered the flip in binding mode. We report kinase selectivity and demonstrate that compounds of this series modulate ALK2 in cancer cells. These inhibitors are attractive starting points for the discovery of more advanced ALK2 inhibitors.

    • Organizational Affiliation: 

    Institute of Cancer Research , 15 Cotswold Road , Sutton , Surrey SM2 5NG , United Kingdom.


Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Activin receptor type-1301Homo sapiensMutation(s): 1 
Gene Names: ACVR1, ACVRLK2
EC: 2.7.11.30
UniProt & NIH Common Fund Data Resources
Find proteins for Q04771 (Homo sapiens)
Explore Q04771 
Go to UniProtKB:  Q04771
PHAROS:  Q04771
GTEx:  ENSG00000115170 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ04771
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
EZB
Query on EZB
Download Ideal Coordinates CCD File 
B [auth A]5-methyl-6-quinolin-5-yl-3~{H}-quinazolin-4-one
C18 H13 N3 O
UUGUFBFLQOTDIV-UHFFFAOYSA-N
SO4
Query on SO4
Download Ideal Coordinates CCD File 
C [auth A],
D [auth A],
E [auth A],
F [auth A]		SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
EDO
Query on EDO
Download Ideal Coordinates CCD File 
G [auth A]
H [auth A]
I [auth A]
J [auth A]
K [auth A]
G [auth A],
H [auth A],
I [auth A],
J [auth A],
K [auth A],
L [auth A],
M [auth A],
N [auth A],
O [auth A],
P [auth A]
1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
Binding Affinity Annotations 
IDSourceBinding Affinity
EZB BindingDB:  6GI6 IC50: 194 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.98 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.213 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 66.149α = 90
b = 66.149β = 90
c = 145.993γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
MOSFLMdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2018-05-23
    Type: Initial release
  • Version 1.1: 2018-08-22
    Changes: Data collection, Database references
  • Version 1.2: 2018-09-05
    Changes: Data collection, Database references
  • Version 1.3: 2024-01-17
    Changes: Data collection, Database references, Refinement description