BRD4_Bromodomain1 complex with pyrrolopyridone compound 27

Experimental Data Snapshot

  • Resolution: 2.39 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.209 

wwPDB Validation   3D Report Full Report

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This is version 1.2 of the entry. See complete history


Discovery ofN-Ethyl-4-[2-(4-fluoro-2,6-dimethyl-phenoxy)-5-(1-hydroxy-1-methyl-ethyl)phenyl]-6-methyl-7-oxo-1H-pyrrolo[2,3-c]pyridine-2-carboxamide (ABBV-744), a BET Bromodomain Inhibitor with Selectivity for the Second Bromodomain.

Sheppard, G.S.Wang, L.Fidanze, S.D.Hasvold, L.A.Liu, D.Pratt, J.K.Park, C.H.Longenecker, K.Qiu, W.Torrent, M.Kovar, P.J.Bui, M.Faivre, E.Huang, X.Lin, X.Wilcox, D.Zhang, L.Shen, Y.Albert, D.H.Magoc, T.J.Rajaraman, G.Kati, W.M.McDaniel, K.F.

(2020) J Med Chem 63: 5585-5623

  • DOI: https://doi.org/10.1021/acs.jmedchem.0c00628
  • Primary Citation of Related Structures:  
    6VIW, 6VIX, 6VIY, 6VIZ

  • PubMed Abstract: 

    The BET family of proteins consists of BRD2, BRD3, BRD4, and BRDt. Each protein contains two distinct bromodomains (BD1 and BD2). BET family bromodomain inhibitors under clinical development for oncology bind to each of the eight bromodomains with similar affinities. We hypothesized that it may be possible to achieve an improved therapeutic index by selectively targeting subsets of the BET bromodomains. Both BD1 and BD2 are highly conserved across family members (>70% identity), whereas BD1 and BD2 from the same protein exhibit a larger degree of divergence (∼40% identity), suggesting selectivity between BD1 and BD2 of all family members would be more straightforward to achieve. Exploiting the Asp144/His437 and Ile146/Val439 sequence differences (BRD4 BD1/BD2 numbering) allowed the identification of compound 27 demonstrating greater than 100-fold selectivity for BRD4 BD2 over BRD4 BD1. Further optimization to improve BD2 selectivity and oral bioavailability resulted in the clinical development compound 46 (ABBV-744).

  • Organizational Affiliation

    Oncology Discovery, AbbVie Inc., 1 North Waukegan Road, North Chicago, Illinois 60064, United States.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Bromodomain-containing protein 4
A, B, C
116Homo sapiensMutation(s): 0 
Gene Names: BRD4HUNK1
UniProt & NIH Common Fund Data Resources
Find proteins for O60885 (Homo sapiens)
Explore O60885 
Go to UniProtKB:  O60885
PHAROS:  O60885
GTEx:  ENSG00000141867 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO60885
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on QYY

Download Ideal Coordinates CCD File 
D [auth A],
E [auth B],
F [auth C]
C27 H29 N3 O5 S
Binding Affinity Annotations 
IDSourceBinding Affinity
QYY Binding MOAD:  6VIZ Ki: 120 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Resolution: 2.39 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.209 
  • Space Group: P 61 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 141.43α = 90
b = 141.43β = 90
c = 134.05γ = 120
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
XDSdata reduction

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2020-05-06
    Type: Initial release
  • Version 1.1: 2020-06-10
    Changes: Database references
  • Version 1.2: 2023-10-11
    Changes: Data collection, Database references, Refinement description