2G35

NMR structure of talin-PTB in complex with PIPKI


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 20 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural Basis for the Phosphorylation-regulated Focal Adhesion Targeting of Type Igamma Phosphatidylinositol Phosphate Kinase (PIPKIgamma) by Talin.

Kong, X.Wang, X.Misra, S.Qin, J.

(2006) J.Mol.Biol. 359: 47-54

  • DOI: 10.1016/j.jmb.2006.02.048

  • PubMed Abstract: 
  • Phosphatidylinositol-4,5-bisphosphate (PIP2) is a key lipid messenger that regulates myriad diverse cellular signaling pathways. To ensure specificity in disparate cellular events, PIP2 must be localized to specific sub-cellular sites. At PIP2-regula ...

    Phosphatidylinositol-4,5-bisphosphate (PIP2) is a key lipid messenger that regulates myriad diverse cellular signaling pathways. To ensure specificity in disparate cellular events, PIP2 must be localized to specific sub-cellular sites. At PIP2-regulated focal adhesion (FA) sites, such localization is in part mediated via the recruitment and activation of PIP2-producing enzyme, type Igamma phosphatidylinositol phosphate kinase (PIPKIgamma), by a phosphotyrosine binding (PTB) domain of talin. Transient phosphorylation of PIPKIgamma at Y644 regulates the interaction and efficient FA targeting of PIPKIgamma; however, the underlying structural basis remains elusive. We have determined the NMR structure of talin-1 PTB in complex with the Y644-phosphorylated PIPKIgamma fragment (WVpYSPLH). As compared to canonical PTB domains that typically recognize the NPXpY turn motif from a variety of signaling proteins, our structure displays an unusual non-NPXpY-based recognition mode for talin-1 PTB where K(357)RW in beta5 strand forms an antiparallel beta-sheet with the VpYS of PIPKIgamma. A specific electrostatic triad between K357/R358 of talin-1 PTB and the pY644 of PIPKIgamma was observed, which is consistent with the mutagenesis and isothermal calorimetry data. Combined with previous in vivo data, our results provide a framework for understanding how phosphorylation of Y644 in PIPKIgamma promotes its specific interaction with talin-1, leading to efficient local synthesis of PIP2 and dynamic regulation of integrin-mediated FA assembly.


    Organizational Affiliation

    Structural Biology Program, Lerner Research Institute, The Cleveland Clinic Foundation, Cleveland State University, OH 44195, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Talin-1
A
100Mus musculusMutation(s): 0 
Gene Names: Tln1 (Tln)
Find proteins for P26039 (Mus musculus)
Go to UniProtKB:  P26039
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
peptide
B
8Homo sapiensMutation(s): 0 
Gene Names: PIP5K1C (KIAA0589)
EC: 2.7.1.68
Find proteins for O60331 (Homo sapiens)
Go to Gene View: PIP5K1C
Go to UniProtKB:  O60331
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
PTR
Query on PTR
B
L-PEPTIDE LINKINGC9 H12 N O6 PTYR
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 20 
  • Olderado: 2G35 Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-05-02
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance