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Deposition Date 2010-10-22
Release Date 2011-01-19
Last Version Date 2024-02-21
Entry Detail
PDB ID:
3PDI
Keywords:
PROTEIN BINDING
Title:
Precursor bound NifEN
Biological Source:
Source Organism:
Azotobacter vinelandii (Taxon ID: 322710)
Host Organism:
Azotobacter Vinelandii
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
2.40 Å
R-Value Free:
0.34
R-Value Work:
0.29
R-Value Observed:
0.29
Space Group:
P 1 21 1
3PDI validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Nitrogenase MoFe cofactor biosynthesis protein NifE
Gene (Uniprot):nifE
Chain IDs:A, C, E, G
Chain Length:483
Number of Molecules:4
Biological Source:Azotobacter vinelandii
UniProt ID:C1DH03 Pfam ID:PF00148
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Nitrogenase MoFe cofactor biosynthesis protein NifN
Gene (Uniprot):nifN
Chain IDs:B, D, F, H
Chain Length:458
Number of Molecules:4
Biological Source:Azotobacter vinelandii
UniProt ID:C1DH04 Pfam ID:PF00148
Ligand Molecules
CZL
SF4
Primary Citation
Structure of Precursor-Bound NifEN: A Nitrogenase FeMo Cofactor Maturase/Insertase.
Science 331 91 94 (2011)
PMID: 21212358 DOI: 10.1126/science.1196954

Abstact

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.

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3PDI