1LCK

SH3-SH2 DOMAIN FRAGMENT OF HUMAN P56-LCK TYROSINE KINASE COMPLEXED WITH THE 10 RESIDUE SYNTHETIC PHOSPHOTYROSYL PEPTIDE TEGQPYQPQPA

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Work: 0.190 
  • R-Value Observed: 0.190 

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


Literature

Structure of the regulatory domains of the Src-family tyrosine kinase Lck.

Eck, M.J., Atwell, S.K., Shoelson, S.E., Harrison, S.C.

(1994) Nature 368: 764-769

  • DOI: 10.1038/368764a0
  • Primary Citation of Related Structures:  
    1LCK

  • PubMed Abstract: 

    • The kinase p56lck (Lck) is a T-lymphocyte-specific member of the Src family of non-receptor tyrosine kinases. Members of the Src family each contain unique amino-terminal regions, followed by Src-homology domains SH3 and SH2, and a tyrosine kinase domain ...

    The kinase p56lck (Lck) is a T-lymphocyte-specific member of the Src family of non-receptor tyrosine kinases. Members of the Src family each contain unique amino-terminal regions, followed by Src-homology domains SH3 and SH2, and a tyrosine kinase domain. SH3 and SH2 domains mediate critical protein interactions in many signal-transducing pathways. They are small, independently folded modules of about 60 and 100 residues, respectively, and they are often but not always found together in the same molecule. Like all nine Src-family kinases (reviewed in ref. 3), Lck is regulated by phosphorylation of a tyrosine in the short C-terminal tail of its catalytic domain. There is evidence that binding of the phosphorylated tail to the SH2 domain inhibits catalytic activity of the kinase domain and that the SH3 and SH2 domains may act together to effect this regulation. Here we report the crystal structures for a fragment of Lck bearing its SH3 and SH2 domains, alone and in complex with a phosphotyrosyl peptide containing the sequence of the Lck C-terminal regulatory tail. The latter complex represents the regulatory apparatus of Lck. The SH3-SH2 fragment forms similar dimers in both crystals, and the tail peptide binds at the intermolecular SH3/SH2 contact. The two structures show how an SH3 domain might recognize a specific target and suggest how dimerization could play a role in regulating Src-family kinases.

    Organizational Affiliation: 

    Howard Hughes Medical Institute, Boston, Massachusetts.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
P56==LCK== TYROSINE KINASEA175Homo sapiensMutation(s): 0 
Gene Names: LCK
EC: 2.7.1.112 (PDB Primary Data), 2.7.10.2 (UniProt)
UniProt & NIH Common Fund Data Resources
Find proteins for P06239 (Homo sapiens)
Explore P06239 
Go to UniProtKB:  P06239
PHAROS:  P06239
GTEx:  ENSG00000182866 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP06239
Protein Feature View
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  • Reference Sequence

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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
TAIL PHOSPHOPEPTIDE TEGQ(PHOSPHO)YQPQPAB9N/AMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for P06239 (Homo sapiens)
Explore P06239 
Go to UniProtKB:  P06239
PHAROS:  P06239
GTEx:  ENSG00000182866 
Entity Groups  
UniProt GroupP06239
Protein Feature View
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  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
PTR
Query on PTR		B L-PEPTIDE LINKINGC9 H12 N O6 PTYR
Binding Affinity Annotations 
IDSourceBinding Affinity
PTR BindingDB:  1LCK Kd: 4.00e+5 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Work: 0.190 
  • R-Value Observed: 0.190 
  • Space Group: H 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 72.35α = 90
b = 72.35β = 90
c = 187.36γ = 120
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

  • Deposited Date: 1994-12-12 
  • Released Date: 1995-10-15 
    • Deposition Author(s): Eck, M., Harrison, S.

Revision History  (Full details and data files)

  • Version 1.0: 1995-10-15
    Type: Initial release
  • Version 1.1: 2008-03-03
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance