2JFC

M144L mutant of Nitrite Reductase from Alcaligenes xylosoxidans in space group P212121


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.193 
  • R-Value Work: 0.171 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The Structure of the met144Leu Mutant of Copper Nitrite Reductase from Alcaligenes Xylosoxidans Provides the First Glimpse of a Protein-Protein Complex with Azurin II.

Paraskevopoulos, K.Hough, M.A.Sawers, R.G.Eady, R.R.Hasnain, S.S.

(2007) J.Biol.Inorg.Chem. 12: 789

  • DOI: 10.1007/s00775-007-0233-y

  • PubMed Abstract: 
  • Cu-containing nitrite reductases (NiRs) perform the reduction of nitrite to NO via an ordered mechanism in which the delivery of a proton and an electron to the catalytic type 2 Cu site is highly orchestrated. Electron transfer from a redox partner p ...

    Cu-containing nitrite reductases (NiRs) perform the reduction of nitrite to NO via an ordered mechanism in which the delivery of a proton and an electron to the catalytic type 2 Cu site is highly orchestrated. Electron transfer from a redox partner protein, azurin or pseudoazurin, to the type 1 Cu site is assumed to occur through the formation of a protein-protein complex. We report here a new crystal form in space group P2(1)2(1)2(1) of the Met144Leu mutant of NiR from Alcaligenes xylosoxidans (AxNiR), revealing a head-to-head packing motif involving residues around the hydrophobic patch of domain 1. Superposition of the structure of azurin II with that of domain 1 of one of the Met144Leu molecules provides the first glimpse of an azurin II-NiR protein-protein complex. Mutations of two of the residues of AxNiR, Trp138His (Barrett et al. in Biochemistry 43:16311-16319, 2004) and Met87Leu, highlighted in the AxNiR-azurin complex, results in substantially decreased activity when azurin is used as the electron donor instead of methyl viologen, providing direct evidence for the importance of this region for complex formation.


    Organizational Affiliation

    Molecular Biophysics Group, STFC Daresbury Laboratory, Warrington, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
DISSIMILATORY COPPER-CONTAINING NITRITE REDUCTASE
A, B, C, D, E, F
335Alcaligenes xylosoxydans xylosoxydansMutation(s): 1 
Gene Names: nir (nirK)
EC: 1.7.2.1
Find proteins for O68601 (Alcaligenes xylosoxydans xylosoxydans)
Go to UniProtKB:  O68601
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CL
Query on CL

Download SDF File 
Download CCD File 
A, B, C, F
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
CU
Query on CU

Download SDF File 
Download CCD File 
A, B, C, D, E, F
COPPER (II) ION
Cu
JPVYNHNXODAKFH-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.193 
  • R-Value Work: 0.171 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 171.958α = 90.00
b = 175.910β = 90.00
c = 181.056γ = 90.00
Software Package:
Software NamePurpose
MOLREPphasing
REFMACrefinement
HKL-2000data scaling
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-05-29
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance