5F67

An exquisitely specific PDZ/target recognition revealed by the structure of INAD PDZ3 in complex with TRP channel tail


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.76 Å
  • R-Value Free: 0.188 
  • R-Value Work: 0.156 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

An Exquisitely Specific PDZ/Target Recognition Revealed by the Structure of INAD PDZ3 in Complex with TRP Channel Tail

Ye, F.Liu, W.Shang, Y.Zhang, M.

(2016) Structure 24: 383-391

  • DOI: 10.1016/j.str.2015.12.013

  • PubMed Abstract: 
  • The vast majority of PDZ domains are known to bind to a few C-terminal tail residues of target proteins with modest binding affinities and specificities. Such promiscuous PDZ/target interactions are not compatible with highly specific physiological f ...

    The vast majority of PDZ domains are known to bind to a few C-terminal tail residues of target proteins with modest binding affinities and specificities. Such promiscuous PDZ/target interactions are not compatible with highly specific physiological functions of PDZ domain proteins and their targets. Here, we report an unexpected PDZ/target binding occurring between the scaffold protein inactivation no afterpotential D (INAD) and transient receptor potential (TRP) channel in Drosophila photoreceptors. The C-terminal 15 residues of TRP are required for the specific interaction with INAD PDZ3. The INAD PDZ3/TRP peptide complex structure reveals that only the extreme C-terminal Leu of TRP binds to the canonical αB/βB groove of INAD PDZ3. The rest of the TRP peptide, by forming a β hairpin structure, binds to a surface away from the αB/βB groove of PDZ3 and contributes to the majority of the binding energy. Thus, the INAD PDZ3/TRP channel interaction is exquisitely specific and represents a new mode of PDZ/target recognitions.


    Organizational Affiliation

    Division of Life Science, State Key Laboratory of Molecular Neuroscience, Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Inactivation-no-after-potential D protein
A, B
108Drosophila melanogasterMutation(s): 0 
Gene Names: inaD
Find proteins for Q24008 (Drosophila melanogaster)
Go to UniProtKB:  Q24008
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
TRP C terminal Tail
C, D
19Drosophila melanogasterMutation(s): 0 
Gene Names: trp
Find proteins for P19334 (Drosophila melanogaster)
Go to UniProtKB:  P19334
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.76 Å
  • R-Value Free: 0.188 
  • R-Value Work: 0.156 
  • Space Group: P 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 57.420α = 90.00
b = 30.126β = 90.50
c = 61.454γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data scaling
PHENIXphasing
PHENIXrefinement
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-02-24
    Type: Initial release
  • Version 1.1: 2016-03-16
    Type: Database references