1LKK

HUMAN P56-LCK TYROSINE KINASE SH2 DOMAIN IN COMPLEX WITH THE PHOSPHOTYROSYL PEPTIDE AC-PTYR-GLU-GLU-ILE (PYEEI PEPTIDE)

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.00 Å
  • R-Value Observed: 0.133 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history. 


Literature

Crystal structures of the human p56lck SH2 domain in complex with two short phosphotyrosyl peptides at 1.0 A and 1.8 A resolution.

Tong, L., Warren, T.C., King, J., Betageri, R., Rose, J., Jakes, S.

(1996) J Mol Biol 256: 601-610

  • DOI: 10.1006/jmbi.1996.0112
  • Primary Citation of Related Structures:  
    1LKL, 1LKK

  • PubMed Abstract: 

    • src homology 2 (SH2) domains are modules of about 100 amino acid residues and bind to phosphotyrosine-containing motifs in a sequence-specific manner. They play important roles in intracellular signal transduction and represent potential targets for pharmacological intervention ...

    src homology 2 (SH2) domains are modules of about 100 amino acid residues and bind to phosphotyrosine-containing motifs in a sequence-specific manner. They play important roles in intracellular signal transduction and represent potential targets for pharmacological intervention. The protein tyrosine kinase p56lck is a member of the src family and is involved in T-cell activation. The crystal structure of its SH2 domain with an 11-residue peptide showed that the phosphotyrosine and the Ile residue at the pY + 3 position are recognized by the SH2 domain. We present here the crystal structure of the SH2 domain of human p56lck in complex with the short phosphotyrosyl peptide Ac-pTyr-Glu-Glu-Ile (pYEEI peptide) at 1.0 A resolution. The structural analysis at atomic resolution reveals that residue Arg134 (alphaA2), which interacts with the phosphotyrosine side-chain, is present in two conformations in the complex. The structure at 1.8 A resolution of the complex with the phosphotyrosyl peptide Ac-pTyr-Glu-Glu-Gly (pYEEG peptide), which is 11 fold less potent, shows another binding mode for the pY + 3 residue as well as rearrangements of the side-chain of Arg196 (EF3) and one of the water molecules at the base of the pY + 3 pocket. The structure of the complex with the short pYEEI peptide at atomic resolution represents a good starting point for the design and optimization of new inhibitors. Comparative structural analysis of many different inhibitor complexes will be an important component of this drug discovery process.

    Organizational Affiliation: 

    Department of Inflammatory Diseases, Boehringer Ingelheim Pharmaceuticals Inc. Ridgefield, CT 06877, USA.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
HUMAN P56 TYROSINE KINASEA105Homo sapiensMutation(s): 0 
Gene Names: LCK
EC: 2.7.10.2
UniProt & NIH Common Fund Data Resources
Find proteins for P06239 (Homo sapiens)
Explore P06239 
Go to UniProtKB:  P06239
PHAROS:  P06239
GTEx:  ENSG00000182866
Protein Feature View
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  • Reference Sequence
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
PHOSPHOTYROSYL PEPTIDE AC-PTYR-GLU-GLU-ILEB5N/AMutation(s): 0 
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ACE
Query on ACE
Download Ideal Coordinates CCD File 
 C [auth B]ACETYL GROUP
C2 H4 O
IKHGUXGNUITLKF-UHFFFAOYSA-N		 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
PTR
Query on PTR		BL-PEPTIDE LINKINGC9 H12 N O6 PTYR
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
PTRKd:  400000   nM  BindingDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.00 Å
  • R-Value Observed: 0.133 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 81.84α = 90
b = 45.04β = 90
c = 26.75γ = 90
Software Package:
Software NamePurpose
SHELXL-93model building
SHELXL-93refinement
SHELXL-93phasing

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

  • Deposited Date: 1995-11-10 
  • Released Date: 1996-03-08 
    • Deposition Author(s): Tong, L.

Revision History  (Full details and data files)

  • Version 1.0: 1996-03-08
    Type: Initial release
  • Version 1.1: 2008-03-03
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance