3BHB

Crystal Structure of KMD Phosphopeptide Bound to Human Class I MHC HLA-A2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.226 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Phosphorylation-dependent interaction between antigenic peptides and MHC class I: a molecular basis for the presentation of transformed self

Mohammed, F.Cobbold, M.Zarling, A.L.Salim, M.Barrett-Wilt, G.A.Shabanowitz, J.Hunt, D.F.Engelhard, V.H.Willcox, B.E.

(2008) Nat.Immunol. 9: 1236-1243

  • DOI: 10.1038/ni.1660
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Protein phosphorylation generates a source of phosphopeptides that are presented by major histocompatibility complex class I molecules and recognized by T cells. As deregulated phosphorylation is a hallmark of malignant transformation, the differenti ...

    Protein phosphorylation generates a source of phosphopeptides that are presented by major histocompatibility complex class I molecules and recognized by T cells. As deregulated phosphorylation is a hallmark of malignant transformation, the differential display of phosphopeptides on cancer cells provides an immunological signature of 'transformed self'. Here we demonstrate that phosphorylation can considerably increase peptide binding affinity for HLA-A2. To understand this, we solved crystal structures of four phosphopeptide-HLA-A2 complexes. These identified a novel peptide-binding motif centered on a solvent-exposed phosphate anchor. Our findings indicate that deregulated phosphorylation can create neoantigens by promoting binding to major histocompatibility complex molecules or by affecting the antigenic identity of presented epitopes. These results highlight the potential of phosphopeptides as novel targets for cancer immunotherapy.


    Organizational Affiliation

    Cancer Research UK Institute for Cancer Studies, School of Cancer Sciences, University of Birmingham, Edgbaston, Birmingham, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HLA class I histocompatibility antigen, A-2 alpha chain
A
274Homo sapiensMutation(s): 0 
Gene Names: HLA-A (HLAA)
Find proteins for P01892 (Homo sapiens)
Go to Gene View: HLA-A
Go to UniProtKB:  P01892
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Beta-2-microglobulin
B
98Homo sapiensMutation(s): 0 
Gene Names: B2M
Find proteins for P61769 (Homo sapiens)
Go to Gene View: B2M
Go to UniProtKB:  P61769
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
decameric peptide from NEDD4-binding protein 2
C
10Homo sapiensMutation(s): 0 
Gene Names: N4BP2 (B3BP, KIAA1413)
EC: 3.-.-.-
Find proteins for Q86UW6 (Homo sapiens)
Go to Gene View: N4BP2
Go to UniProtKB:  Q86UW6
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
EDO
Query on EDO

Download SDF File 
Download CCD File 
A
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
SEP
Query on SEP
C
L-PEPTIDE LINKINGC3 H8 N O6 PSER
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.226 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 57.100α = 90.00
b = 80.200β = 115.90
c = 57.300γ = 90.00
Software Package:
Software NamePurpose
XSCALEdata scaling
MOLREPphasing
CNSrefinement
XSCALEdata processing
PDB_EXTRACTdata extraction
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-10-21
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance