1D4T

CRYSTAL STRUCTURE OF THE XLP PROTEIN SAP IN COMPLEX WITH A SLAM PEPTIDE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.1 Å
  • R-Value Free: 0.165 
  • R-Value Work: 0.115 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Crystal structures of the XLP protein SAP reveal a class of SH2 domains with extended, phosphotyrosine-independent sequence recognition.

Poy, F.Yaffe, M.B.Sayos, J.Saxena, K.Morra, M.Sumegi, J.Cantley, L.C.Terhorst, C.Eck, M.J.

(1999) Mol.Cell 4: 555-561

  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • SAP, the product of the gene mutated in X-linked lymphoproliferative syndrome (XLP), consists of a single SH2 domain that has been shown to bind the cytoplasmic tail of the lymphocyte coreceptor SLAM. Here we describe structures that show that SAP bi ...

    SAP, the product of the gene mutated in X-linked lymphoproliferative syndrome (XLP), consists of a single SH2 domain that has been shown to bind the cytoplasmic tail of the lymphocyte coreceptor SLAM. Here we describe structures that show that SAP binds phosphorylated and nonphosphorylated SLAM peptides in a similar mode, with the tyrosine or phosphotyrosine residue inserted into the phosphotyrosine-binding pocket. We find that specific interactions with residues N-terminal to the tyrosine, in addition to more characteristic C-terminal interactions, stabilize the complexes. A phosphopeptide library screen and analysis of mutations identified in XLP patients confirm that these extended interactions are required for SAP function. Further, we show that SAP and the similar protein EAT-2 recognize the sequence motif TIpYXX(V/I).


    Related Citations: 
    • The X-linked lymphoproliferative disease gene product SAP regulates signals induced through the co-receptor SLAM
      Sayos, J.,Wu, C.,Morra, M.,Wang, N.,Terhosrt, C.
      (1998) Nature 395: 462


    Organizational Affiliation

    Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, Massachusetts 02115, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
T CELL SIGNAL TRANSDUCTION MOLECULE SAP
A
104Homo sapiensMutation(s): 0 
Gene Names: SH2D1A (DSHP, SAP)
Find proteins for O60880 (Homo sapiens)
Go to Gene View: SH2D1A
Go to UniProtKB:  O60880
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
SIGNALING LYMPHOCYTIC ACTIVATION MOLECULE
B
11Homo sapiensMutation(s): 0 
Gene Names: SLAMF1 (SLAM)
Find proteins for Q13291 (Homo sapiens)
Go to Gene View: SLAMF1
Go to UniProtKB:  Q13291
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.1 Å
  • R-Value Free: 0.165 
  • R-Value Work: 0.115 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 25.870α = 90.00
b = 42.910β = 98.26
c = 44.950γ = 90.00
Software Package:
Software NamePurpose
ARPmodel building
DENZOdata reduction
SHELXL-97refinement
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1999-10-14
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2018-01-31
    Type: Experimental preparation