1N7T

ERBIN PDZ domain bound to a phage-derived peptide


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: least violation of experimental restraints 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Origins of PDZ domain ligand specificity. Structure determination and mutagenesis of the Erbin PDZ domain.

Skelton, N.J.Koehler, M.F.T.Zobel, K.Wong, W.L.Yeh, S.Pisabarro, M.T.Yin, J.P.Lasky, L.A.Sidhu, S.S.

(2003) J Biol Chem 278: 7645-7654

  • DOI: 10.1074/jbc.M209751200
  • Primary Citation of Related Structures:  
    1N7T

  • PubMed Abstract: 
  • The LAP (leucine-rich repeat and PDZ-containing) family of proteins play a role in maintaining epithelial and neuronal cell size, and mutation of these proteins can have oncogenic consequences. The LAP protein Erbin has been implicated previously in a number of cellular activities by virtue of its PDZ domain-dependent association with the C termini of both ERB-B2 and the p120-catenins ...

    The LAP (leucine-rich repeat and PDZ-containing) family of proteins play a role in maintaining epithelial and neuronal cell size, and mutation of these proteins can have oncogenic consequences. The LAP protein Erbin has been implicated previously in a number of cellular activities by virtue of its PDZ domain-dependent association with the C termini of both ERB-B2 and the p120-catenins. The present work describes the NMR structure of Erbin PDZ in complex with a high affinity peptide ligand and includes a comprehensive energetic analysis of both the ligand and PDZ domain side chains responsible for binding. C-terminal phage display has been used to identify preferred ligands, whereas binding affinity measurements provide precise details of the energetic importance of each ligand side chain to binding. Alanine and homolog scanning mutagenesis (in a combinatorial phage display format) identifies Erbin side chains that make energetically important contacts with the ligand. The structure of a phage-optimized peptide (Ac-TGW(-4)ETW(-1)V; IC(50) = approximately 0.15 microm) in complex with Erbin PDZ provides a structural context to understand the binding energetics. In particular, the very favorable interactions with Trp(-1) are not Erbin side chain-mediated (and therefore may be generally applicable to many PDZ domains), whereas the beta2-beta3 loop provides a binding site for the Trp(-4) side chain (specific to Erbin because it has an unusually long loop). These results contribute to a growing appreciation for the importance of at least five ligand C-terminal side chains in determining PDZ domain binding energy and highlight the mechanisms of ligand discrimination among the several hundred PDZ domains present in the human genome.


    Organizational Affiliation

    Department of Protein Engineering, Genentech, Inc., South San Francisco, California 94080, USA. skelly@gene.com



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
99-mer peptide of densin-180-like proteinA103Homo sapiensMutation(s): 0 
Gene Names: ERBINERBB2IPKIAA1225LAP2
UniProt & NIH Common Fund Data Resources
Find proteins for Q96RT1 (Homo sapiens)
Explore Q96RT1 
Go to UniProtKB:  Q96RT1
PHAROS:  Q96RT1
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
phage-derived peptideB7N/AMutation(s): 0 
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: least violation of experimental restraints 
  • OLDERADO: 1N7T Olderado

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-01-28
    Type: Initial release
  • Version 1.1: 2008-04-28
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance