3MAZ

Crystal Structure of the Human BRDG1/STAP-1 SH2 Domain in Complex with the NTAL pTyr136 Peptide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.212 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Loops govern SH2 domain specificity by controlling access to binding pockets.

Kaneko, T.Huang, H.Zhao, B.Li, L.Liu, H.Voss, C.K.Wu, C.Schiller, M.R.Li, S.S.

(2010) Sci.Signal. 3: ra34-ra34

  • DOI: 10.1126/scisignal.2000796

  • PubMed Abstract: 
  • Cellular functions require specific protein-protein interactions that are often mediated by modular domains that use binding pockets to engage particular sequence motifs in their partners. Yet, how different members of a domain family select for dist ...

    Cellular functions require specific protein-protein interactions that are often mediated by modular domains that use binding pockets to engage particular sequence motifs in their partners. Yet, how different members of a domain family select for distinct sequence motifs is not fully understood. The human genome encodes 120 Src homology 2 (SH2) domains (in 110 proteins), which mediate protein-protein interactions by binding to proteins with diverse phosphotyrosine (pTyr)-containing sequences. The structure of the SH2 domain of BRDG1 bound to a peptide revealed a binding pocket that was blocked by a loop residue in most other SH2 domains. Analysis of 63 SH2 domain structures suggested that the SH2 domains contain three binding pockets, which exhibit selectivity for the three positions after the pTyr in a peptide, and that SH2 domain loops defined the accessibility and shape of these pockets. Despite sequence variability in the loops, we identified conserved structural features in the loops of SH2 domains responsible for controlling access to these surface pockets. We engineered new loops in an SH2 domain that altered specificity as predicted. Thus, selective blockage of binding subsites or pockets by surface loops provides a molecular basis by which the diverse modes of ligand recognition by the SH2 domain may have evolved and provides a framework for engineering SH2 domains and designing SH2-specific inhibitors.


    Organizational Affiliation

    Department of Biochemistry and the Siebens-Drake Research Institute, Schulich School of Medicine and Dentistry, University of Western Ontario, London, Ontario, Canada N6A 5C1.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Signal-transducing adaptor protein 1
A
125Homo sapiensMutation(s): 1 
Gene Names: STAP1 (BRDG1)
Find proteins for Q9ULZ2 (Homo sapiens)
Go to Gene View: STAP1
Go to UniProtKB:  Q9ULZ2
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
CheD family protein
B
12Homo sapiensMutation(s): 1 
Gene Names: LAT2 (LAB, NTAL, WBS15, WBSCR15, WBSCR5)
Find proteins for Q9GZY6 (Homo sapiens)
Go to Gene View: LAT2
Go to UniProtKB:  Q9GZY6
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MLI
Query on MLI

Download SDF File 
Download CCD File 
A
MALONATE ION
C3 H2 O4
OFOBLEOULBTSOW-UHFFFAOYSA-L
 Ligand Interaction
Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
NH2
Query on NH2
B
NON-POLYMERH2 N

--

PTR
Query on PTR
B
L-PEPTIDE LINKINGC9 H12 N O6 PTYR
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.212 
  • Space Group: P 62 2 2
Unit Cell:
Length (Å)Angle (°)
a = 72.640α = 90.00
b = 72.640β = 90.00
c = 97.840γ = 120.00
Software Package:
Software NamePurpose
PHASERphasing
CrystalCleardata collection
CrystalCleardata reduction
CNSrefinement
CrystalCleardata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-05-12
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance