2AN2

P332G, A333S Double mutant of the Bacillus subtilis Nitric Oxide Synthase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.216 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Structure of a loose dimer: an intermediate in nitric oxide synthase assembly

Pant, K.Crane, B.R.

(2005) J.Mol.Biol. 352: 932-940

  • DOI: 10.1016/j.jmb.2005.07.070
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Cooperativity among ligand binding, subunit association, and protein folding has implications for enzyme regulation as well as protein aggregation events associated with disease. The binding of substrate l-arginine or cofactor tetrahydrobiopterin con ...

    Cooperativity among ligand binding, subunit association, and protein folding has implications for enzyme regulation as well as protein aggregation events associated with disease. The binding of substrate l-arginine or cofactor tetrahydrobiopterin converts nitric oxide synthases (NOSs) from a "loose dimer", with an exposed active center and higher sensitivity to proteolysis, to a "tight dimer" competent for catalysis. The crystallographic structure of the Bacillus subtilis NOS loose dimer shows an altered association state with severely destabilized subdomains. Ligand binding or heme reduction converts loose dimers to tight dimers in solution and crystals. Mutations at key positions in the dimer interface that distinguish prokaryotic from eukaryotic NOSs affect the propensity to form loose dimers. The loose dimer structure indicates that non-native interactions can mediate subunit association in NOS.


    Organizational Affiliation

    Department of Chemistry and Chemical Biology, Cornell University Ithaca, NY 14853, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
P332G A333S double mutant of Nitric Oxide Synthase from Bacillus subtilis
A
360Bacillus subtilis (strain 168)Mutation(s): 0 
Gene Names: nos (yflM)
EC: 1.14.14.47
Find proteins for O34453 (Bacillus subtilis (strain 168))
Go to UniProtKB:  O34453
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HEM
Query on HEM

Download SDF File 
Download CCD File 
A
PROTOPORPHYRIN IX CONTAINING FE
HEME
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L
 Ligand Interaction
H4B
Query on H4B

Download SDF File 
Download CCD File 
A
5,6,7,8-TETRAHYDROBIOPTERIN
C9 H15 N5 O3
FNKQXYHWGSIFBK-RPDRRWSUSA-N
 Ligand Interaction
ARG
Query on ARG

Download SDF File 
Download CCD File 
A
ARGININE
C6 H15 N4 O2
ODKSFYDXXFIFQN-BYPYZUCNSA-O
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.216 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 80.603α = 90.00
b = 93.515β = 90.00
c = 63.571γ = 90.00
Software Package:
Software NamePurpose
AMoREphasing
HKL-2000data collection
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2005-08-11 
  • Released Date: 2006-08-29 
  • Deposition Author(s): Pant, K., Crane, B.R.

Revision History 

  • Version 1.0: 2006-08-29
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2016-12-14
    Type: Other