4CLB

N-TERMINAL BROMODOMAIN OF HUMAN BRD4 WITH IBET-295

• PDB DOI: https://doi.org/10.2210/pdb4CLB/pdb

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


• Deposited: 2014-01-13 Released: 2014-12-24 
• Deposition Author(s): Chung, C., Atkinson, S.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.60 Å
• R-Value Free: 0.205 
• R-Value Work: 0.165 
• R-Value Observed: 0.167 

Literature

The Structure Based Design of Dual Hdac/Bet Inhibitors as Novel Epigenetic Probes.

Atkinson, S.J., Soden, P.E., Angell, D.C., Bantscheff, M., Chung, C., Giblin, K.A., Smithers, N., Furze, R.C., Gordon, L., Drewes, G., Rioja, I., Witherington, J., Parr, N.J., Prinjha, R.K.

(2014) Medchemcomm 5: 342

• DOI: https://doi.org/10.1039/C3MD00285C

Biological Assembly 1  

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

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

Macromolecule Content

• Total Structure Weight: 15.57 kDa 
• Atom Count: 1,408 
• Modelled Residue Count: 127 
• Deposited Residue Count: 127 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
BROMODOMAIN-CONTAINING PROTEIN 4	A	127	Homo sapiens	Mutation(s): 0
UniProt & NIH Common Fund Data Resources
Find proteins for O60885 (Homo sapiens) Explore O60885  Go to UniProtKB:  O60885
PHAROS:  O60885 GTEx:  ENSG00000141867

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
83T	C [auth A]	propan-2-yl N-[(2S,4R)-1-ethanoyl-2-methyl-6-[4-(methylaminomethyl)phenyl]-3,4-dihydro-2H-quinolin-4-yl]carbamate C24 H31 N3 O3 PXCIUCWFKRTXSJ-KSFYIVLOSA-N
EDO	B [auth A]	1,2-ETHANEDIOL C2 H6 O2 LYCAIKOWRPUZTN-UHFFFAOYSA-N

Binding Affinity Annotations
ID	Source	Binding Affinity
83T	BindingDB:  4CLB	IC50: 280 (nM) from 1 assay(s)

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.60 Å
• R-Value Free: 0.205 
• R-Value Work: 0.165 
• R-Value Observed: 0.167 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 41.784	α = 90
b = 49.417	β = 90
c = 57.269	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
XDS	data reduction
SCALA	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2014-12-24 
Deposition Author(s): Chung, C., Atkinson, S.

Revision History  

• Version 1.0: 2014-12-24
  Type: Initial release
  
• Version 1.1: 2024-05-08
  Changes: Data collection, Database references, Derived calculations, Other