7TO9

BRD3-BD1 in complex with RaPID linear peptide 2xAcK.4xE (diAcK.4xE)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.60 Å
  • R-Value Free: 0.227 
  • R-Value Work: 0.199 
  • R-Value Observed: 0.200 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

mRNA display reveals a class of high-affinity bromodomain-binding motifs that are not found in the human proteome.

Low, J.K.K.Patel, K.Jones, N.Solomon, P.Norman, A.Maxwell, J.W.C.Pachl, P.Matthews, J.M.Payne, R.J.Passioura, T.Suga, H.Walport, L.J.Mackay, J.P.

(2023) J Biol Chem 299: 105482-105482

  • DOI: https://doi.org/10.1016/j.jbc.2023.105482
  • Primary Citation of Related Structures:  
    7TO7, 7TO8, 7TO9, 7TOA

  • PubMed Abstract: 

    Bromodomains (BDs) regulate gene expression by recognizing protein motifs containing acetyllysine. Although originally characterized as histone-binding proteins, it has since become clear that these domains interact with other acetylated proteins, perhaps most prominently transcription factors. The likely transient nature and low stoichiometry of such modifications, however, has made it challenging to fully define the interactome of any given BD. To begin to address this knowledge gap in an unbiased manner, we carried out mRNA display screens against a BD-the N-terminal BD of BRD3-using peptide libraries that contained either one or two acetyllysine residues. We discovered peptides with very strong consensus sequences and with affinities that are significantly higher than typical BD-peptide interactions. X-ray crystal structures also revealed modes of binding that have not been seen with natural ligands. Intriguingly, however, our sequences are not found in the human proteome, perhaps suggesting that strong binders to BDs might have been selected against during evolution.


  • Organizational Affiliation

    School of Life and Environmental Sciences, University of Sydney, New South Wales, Australia.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Bromodomain-containing protein 3
A, B
128Homo sapiensMutation(s): 0 
Gene Names: BRD3KIAA0043RING3L
UniProt & NIH Common Fund Data Resources
Find proteins for Q15059 (Homo sapiens)
Explore Q15059 
Go to UniProtKB:  Q15059
PHAROS:  Q15059
GTEx:  ENSG00000169925 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ15059
Sequence Annotations
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  • Reference Sequence

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
2xAcK.4xE (diAcK.4xE)18synthetic constructMutation(s): 0 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
ALY
Query on ALY
C
L-PEPTIDE LINKINGC8 H16 N2 O3LYS
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.60 Å
  • R-Value Free: 0.227 
  • R-Value Work: 0.199 
  • R-Value Observed: 0.200 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 40.582α = 90
b = 64.366β = 94.935
c = 52.312γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
PHENIXrefinement
XDSdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Health and Medical Research Council (NHMRC, Australia)AustraliaAPP1161623

Revision History  (Full details and data files)

  • Version 1.0: 2023-01-25
    Type: Initial release
  • Version 1.1: 2023-10-25
    Changes: Data collection, Refinement description
  • Version 1.2: 2023-11-15
    Changes: Data collection
  • Version 1.3: 2024-02-07
    Changes: Database references