3PDI

Precursor bound NifEN


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.341 
  • R-Value Work: 0.294 
  • R-Value Observed: 0.299 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structure of Precursor-Bound NifEN: A Nitrogenase FeMo Cofactor Maturase/Insertase.

Kaiser, J.T.Hu, Y.Wiig, J.A.Rees, D.C.Ribbe, M.W.

(2011) Science 331: 91-94

  • DOI: 10.1126/science.1196954
  • Primary Citation of Related Structures:  
    3PDI

  • PubMed Abstract: 
  • NifEN plays an essential role in the biosynthesis of the nitrogenase iron-molybdenum (FeMo) cofactor (M cluster). It is an α(2)β(2) tetramer that is homologous to the catalytic molybdenum-iron (MoFe) protein (NifDK) component of nitrogenase. NifEN serves as a scaffold for the conversion of an iron-only precursor to a matured form of the M cluster before delivering the latter to its target location within NifDK ...

    NifEN plays an essential role in the biosynthesis of the nitrogenase iron-molybdenum (FeMo) cofactor (M cluster). It is an α(2)β(2) tetramer that is homologous to the catalytic molybdenum-iron (MoFe) protein (NifDK) component of nitrogenase. NifEN serves as a scaffold for the conversion of an iron-only precursor to a matured form of the M cluster before delivering the latter to its target location within NifDK. Here, we present the structure of the precursor-bound NifEN of Azotobacter vinelandii at 2.6 angstrom resolution. From a structural comparison of NifEN with des-M-cluster NifDK and holo NifDK, we propose similar pathways of cluster insertion for the homologous NifEN and NifDK proteins.


    Organizational Affiliation

    Division of Chemistry and Chemical Engineering, California Institute of Technology, Mail Code 114-96, Pasadena, CA 91125, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Nitrogenase MoFe cofactor biosynthesis protein NifEA, C, E, G483Azotobacter vinelandii DJMutation(s): 0 
Gene Names: Avin_01450nifE
Find proteins for C1DH03 (Azotobacter vinelandii (strain DJ / ATCC BAA-1303))
Explore C1DH03 
Go to UniProtKB:  C1DH03
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Nitrogenase MoFe cofactor biosynthesis protein NifNB, D, F, H458Azotobacter vinelandii DJMutation(s): 0 
Gene Names: Avin_01470nifN
Find proteins for C1DH04 (Azotobacter vinelandii (strain DJ / ATCC BAA-1303))
Explore C1DH04 
Go to UniProtKB:  C1DH04
Protein Feature View
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.341 
  • R-Value Work: 0.294 
  • R-Value Observed: 0.299 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 146.07α = 90
b = 95.22β = 95.5
c = 149.98γ = 90
Software Package:
Software NamePurpose
Blu-Icedata collection
PHASERphasing
PHENIXrefinement
XDSdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-01-19
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance