4XZ0

ZAP-70-tSH2:compound-A complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.212 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Modification by covalent reaction or oxidation of cysteine residues in the tandem-SH2 domains of ZAP-70 and Syk can block phosphopeptide binding.

Visperas, P.R.Winger, J.A.Horton, T.M.Shah, N.H.Aum, D.J.Tao, A.Barros, T.Yan, Q.Wilson, C.G.Arkin, M.R.Weiss, A.Kuriyan, J.

(2015) Biochem. J. 465: 149-161

  • DOI: 10.1042/BJ20140793
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Zeta-chain associated protein of 70┬ákDa (ZAP-70) and spleen tyrosine kinase (Syk) are non-receptor tyrosine kinases that are essential for T-cell and B-cell antigen receptor signalling respectively. They are recruited, via their tandem-SH2 (Src-homol ...

    Zeta-chain associated protein of 70 kDa (ZAP-70) and spleen tyrosine kinase (Syk) are non-receptor tyrosine kinases that are essential for T-cell and B-cell antigen receptor signalling respectively. They are recruited, via their tandem-SH2 (Src-homology domain 2) domains, to doubly phosphorylated immunoreceptor tyrosine-based activation motifs (ITAMs) on invariant chains of immune antigen receptors. Because of their critical roles in immune signalling, ZAP-70 and Syk are targets for the development of drugs for autoimmune diseases. We show that three thiol-reactive small molecules can prevent the tandem-SH2 domains of ZAP-70 and Syk from binding to phosphorylated ITAMs. We identify a specific cysteine residue in the phosphotyrosine-binding pocket of each protein (Cys39 in ZAP-70, Cys206 in Syk) that is necessary for inhibition by two of these compounds. We also find that ITAM binding to ZAP-70 and Syk is sensitive to the presence of H2O2 and these two cysteine residues are also necessary for inhibition by H2O2. Our findings suggest a mechanism by which the reactive oxygen species generated during responses to antigen could attenuate signalling through these kinases and may also inform the development of ZAP-70 and Syk inhibitors that bind covalently to their SH2 domains.


    Organizational Affiliation

    *Department of Molecular and Cell Biology and Department of Chemistry, California Institute of Quantitative Biosciences and Howard Hughes Medical Institute, University of California, Berkeley, CA 94720, U.S.A.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Tyrosine-protein kinase ZAP-70
A
262Homo sapiensMutation(s): 0 
Gene Names: ZAP70 (SRK)
EC: 2.7.10.2
Find proteins for P43403 (Homo sapiens)
Go to Gene View: ZAP70
Go to UniProtKB:  P43403
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
4N5
Query on 4N5

Download SDF File 
Download CCD File 
A
1-(3-{5-[(3-chlorobenzyl)sulfonyl]-1H-tetrazol-1-yl}phenyl)ethanone
C16 H13 Cl N4 O3 S
VMFCIDSTIJTUES-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.212 
  • Space Group: P 63
Unit Cell:
Length (Å)Angle (°)
a = 103.418α = 90.00
b = 103.418β = 90.00
c = 52.817γ = 120.00
Software Package:
Software NamePurpose
Aimlessdata scaling
XDSdata scaling
PHENIXrefinement
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of Arthritis and Musculoskeletal and Skin DiseasesUnited States1RC2-AR058947-01

Revision History 

  • Version 1.0: 2015-06-17
    Type: Initial release
  • Version 1.1: 2017-09-13
    Type: Author supporting evidence, Derived calculations, Source and taxonomy
  • Version 1.2: 2017-11-22
    Type: Advisory, Refinement description