8PX8

C-TERMINAL BROMODOMAIN OF HUMAN BRD2 WITH (S)-5-(1-((1-acetylpiperidin-3-yl)methyl)-5-bromo-1H-benzo[d]imidazol-2-yl)-1,3-dimethylpyridin-2(1H)-one

• PDB DOI: https://doi.org/10.2210/pdb8PX8/pdb

• Classification: TRANSCRIPTION
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2023-07-22 Released: 2023-10-18 
• Deposition Author(s): Chung, C.W.
• Funding Organization(s): Not funded

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.60 Å
• R-Value Free: 0.171 
• R-Value Work: 0.144 

Literature

Structure-Guided Design of a Domain-Selective Bromodomain and Extra Terminal N-Terminal Bromodomain Chemical Probe.

Bradley, E., Fusani, L., Chung, C.W., Craggs, P.D., Demont, E.H., Humphreys, P.G., Mitchell, D.J., Phillipou, A., Rioja, I., Shah, R.R., Wellaway, C.R., Prinjha, R.K., Palmer, D.S., Kerr, W.J., Reid, M., Wall, I.D., Cookson, R.

(2023) J Med Chem 66: 15728-15749

• PubMed: 37967462 
• DOI: https://doi.org/10.1021/acs.jmedchem.3c00906
• Primary Citation of Related Structures:  
  8PX2, 8PX8, 8PXA


• PubMed Abstract: 
  

  Small-molecule-mediated disruption of the protein-protein interactions between acetylated histone tails and the tandem bromodomains of the bromodomain and extra-terminal (BET) family of proteins is an important mechanism of action for the potential modulation of immuno-inflammatory and oncology disease. High-quality chemical probes have proven invaluable in elucidating profound BET bromodomain biology, with seminal publications of both pan- and domain-selective BET family bromodomain inhibitors enabling academic and industrial research. To enrich the toolbox of structurally differentiated N-terminal bromodomain (BD1) BET family chemical probes, this work describes an analysis of the GSK BRD4 bromodomain data set through a lipophilic efficiency lens, which enabled identification of a BD1 domain-biased benzimidazole series. Structure-guided growth targeting a key Asp/His BD1/BD2 switch enabled delivery of GSK023, a high-quality chemical probe with 300-1000-fold BET BD1 domain selectivity and a phenotypic cellular fingerprint consistent with BET bromodomain inhibition.

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Organizational Affiliation: 

GSK, Medicines Research Centre, Stevenage SG1 2NY, Hertfordshire, U.K.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly Evidence: gel filtration

Macromolecule Content

• Total Structure Weight: 14.15 kDa 
• Atom Count: 1,192 
• Modelled Residue Count: 110 
• Deposited Residue Count: 115 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Bromodomain-containing protein 2	A	115	Homo sapiens	Mutation(s): 0  Gene Names: BRD2, KIAA9001, RING3
UniProt & NIH Common Fund Data Resources
Find proteins for P25440 (Homo sapiens) Explore P25440  Go to UniProtKB:  P25440
PHAROS:  P25440 GTEx:  ENSG00000204256

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
I0U (Subject of Investigation/LOI)	D [auth A]	5-[5-bromanyl-1-[[(3~{S})-1-ethanoylpiperidin-3-yl]methyl]benzimidazol-2-yl]-1,3-dimethyl-pyridin-2-one C22 H25 Br N4 O2 TWBOQOYETRQSEE-MRXNPFEDSA-N
MES	C [auth A]	2-(N-MORPHOLINO)-ETHANESULFONIC ACID C6 H13 N O4 S SXGZJKUKBWWHRA-UHFFFAOYSA-N
EDO	B [auth A]	1,2-ETHANEDIOL C2 H6 O2 LYCAIKOWRPUZTN-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.60 Å
• R-Value Free: 0.171 
• R-Value Work: 0.144 
• Space Group: P 2₁ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 71.825	α = 90
b = 52.573	β = 90
c = 31.975	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
XDS	data reduction
Aimless	data scaling

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2023-10-18 
Deposition Author(s): Chung, C.W.

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Funding Organization	Location	Grant Number
Not funded		--

Revision History  

• Version 1.0: 2023-10-18
  Type: Initial release
  
• Version 1.1: 2023-11-29
  Changes: Database references, Structure summary
• Version 1.2: 2023-12-27
  Changes: Database references