1QAU | pdb_00001qau

UNEXPECTED MODES OF PDZ DOMAIN SCAFFOLDING REVEALED BY STRUCTURE OF NNOS-SYNTROPHIN COMPLEX

• PDB DOI: https://doi.org/10.2210/pdb1QAU/pdb

• Classification: OXIDOREDUCTASE
• Organism(s): Rattus norvegicus
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 1999-03-29 Released: 1999-05-04 
• Deposition Author(s): Hillier, B.J., Christopherson, K.S., Prehoda, K.E., Bredt, D.S., Lim, W.A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.25 Å
• R-Value Free: 
  0.255 (Depositor) 
• R-Value Work: 
  0.239 (Depositor) 

Literature

Unexpected modes of PDZ domain scaffolding revealed by structure of nNOS-syntrophin complex.

Hillier, B.J., Christopherson, K.S., Prehoda, K.E., Bredt, D.S., Lim, W.A.

(1999) Science 284: 812-815

• PubMed: 10221915 
• Primary Citation Related Structures: 
  1QAU, 1QAV


• PubMed Abstract: 
  

  The PDZ protein interaction domain of neuronal nitric oxide synthase (nNOS) can heterodimerize with the PDZ domains of postsynaptic density protein 95 and syntrophin through interactions that are not mediated by recognition of a typical carboxyl-terminal motif. The nNOS-syntrophin PDZ complex structure revealed that the domains interact in an unusual linear head-to-tail arrangement. The nNOS PDZ domain has two opposite interaction surfaces-one face has the canonical peptide binding groove, whereas the other has a beta-hairpin "finger." This nNOS beta finger docks in the syntrophin peptide binding groove, mimicking a peptide ligand, except that a sharp beta turn replaces the normally required carboxyl terminus. This structure explains how PDZ domains can participate in diverse interaction modes to assemble protein networks.

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Organizational Affiliation: 
• Department of Cellular and Molecular Pharmacology, University of California, San Francisco, San Francisco, CA 94143, USA.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 12.03 kDa 
• Atom Count: 885 
• Modeled Residue Count: 112 
• Deposited Residue Count: 112 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
NEURONAL NITRIC OXIDE SYNTHASE (RESIDUES 1-130)	A	112	Rattus norvegicus	Mutation(s): 0  EC: 1.14.13.39
UniProt
Find proteins for P29476 (Rattus norvegicus) Explore P29476  Go to UniProtKB:  P29476

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.25 Å
• R-Value Free:  0.255 (Depositor) 
• R-Value Work:  0.239 (Depositor) 

Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 35.18	α = 90
b = 38.99	β = 90
c = 85.6	γ = 90

Software Package:

Software Name	Purpose
SHARP	phasing
CNS	refinement
DENZO	data reduction
SCALEPACK	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 1999-05-04 
Deposition Author(s): Hillier, B.J., Christopherson, K.S., Prehoda, K.E., Bredt, D.S., Lim, W.A.

Revision History  

• Version 1.0: 1999-05-04
  Type: Initial release
  
• Version 1.1: 2008-04-27
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2024-02-14
  Changes: Data collection, Database references