1H1L image
Deposition Date 2002-07-18
Release Date 2002-07-29
Last Version Date 2023-12-13
Entry Detail
PDB ID:
1H1L
Keywords:
OXIDOREDUCTASE
Title:
NITROGENASE MO-FE PROTEIN FROM KLEBSIELLA PNEUMONIAE, NIFV MUTANT
Biological Source:
Source Organism:
KLEBSIELLA PNEUMONIAE (Taxon ID: 573)
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
1.90 Å
R-Value Free:
0.23
R-Value Work:
0.17
Space Group:
C 1 2 1
1H1L validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Molecule:NITROGENASE MOLYBDENUM IRON PROTEIN ALPHA CHAIN
Gene (Uniprot):nifD
Chain IDs:A, C
Chain Length:481
Number of Molecules:2
Biological Source:KLEBSIELLA PNEUMONIAE
UniProt ID:P00466 Pfam ID:PF00148 EC:1.18.6.1
Protein Blast
Polymer Type:polypeptide(L)
Molecule:NITROGENASE MOLYBDENUM IRON PROTEIN BETA CHAIN
Gene (Uniprot):nifK
Chain IDs:B, D
Chain Length:519
Number of Molecules:2
Biological Source:KLEBSIELLA PNEUMONIAE
UniProt ID:P09772 Pfam ID:PF11844, PF00148 EC:1.18.6.1
Ligand Molecules
CFM
CIT
CL
CLF
MG
Primary Citation
Crystallographic Analysis of the Mofe Protein of Nitrogenase from a Nifv Mutant of Klebsiella Pneumoniae Identifies Citrate as a Ligand to the Molybdenum of Iron Molybdenum Cofactor (Femoco).
J.Biol.Chem. 277 35263 ? (2002)
PMID: 12133839 DOI: 10.1074/JBC.M205888200

Abstact

The x-ray crystal structure of NifV(-) Klebsiella pneumoniae nitrogenase MoFe protein (NifV(-) Kp1) has been determined and refined to a resolution of 1.9 A. This is the first structure for a nitrogenase MoFe protein with an altered cofactor. Moreover, it is the first direct evidence that the organic acid citrate is not just present, but replaces homocitrate as a ligand to the molybdenum atom of the iron molybdenum cofactor (FeMoco). Subsequent refinement of the structure revealed that the citrate was present at reduced occupancy.

Legend

Protein

Chemical

Disease

Primary Citation of related structures
1QGU
1QH1
1QH8