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: 2.5 Å
  • R-Value Work: 0.190 

wwPDB Validation 3D Report Full Report


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

  • 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 do ...

    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

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
P56==LCK== TYROSINE KINASE
A
175Homo sapiensMutation(s): 0 
Gene Names: LCK
EC: 2.7.10.2
Find proteins for P06239 (Homo sapiens)
Go to Gene View: LCK
Go to UniProtKB:  P06239
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
TAIL PHOSPHOPEPTIDE TEGQ(PHOSPHO)YQPQPA
B
9Homo sapiensMutation(s): 0 
Gene Names: LCK
EC: 2.7.10.2
Find proteins for P06239 (Homo sapiens)
Go to Gene View: LCK
Go to UniProtKB:  P06239
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
PTR
Query on PTR
B
L-PEPTIDE LINKINGC9 H12 N O6 PTYR
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
PTRKd: 400000 nM (100) BINDINGDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Work: 0.190 
  • Space Group: H 3 2
Unit Cell:
Length (Å)Angle (°)
a = 72.350α = 90.00
b = 72.350β = 90.00
c = 187.360γ = 120.00
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORphasing
X-PLORrefinement

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

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

Revision History 

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