5XVB image
Entry Detail
PDB ID:
5XVB
Keywords:
OXIDOREDUCTASE
Title:
[NiFe]-hydrogenase (Hyb-type) from Citrobacter sp. S-77 in an H2-reduced condition
Biological Source:
Source Organism:
Citrobacter sp. S-77
PDB Version:
Deposition Date:
2017-06-27
Release Date:
2018-06-27
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
1.84 Å
R-Value Free:
0.21
R-Value Work:
0.18
R-Value Observed:
0.18
Space Group:
P 1 21 1
5XVB validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Description:[NiFe]-hydrogenase 2 large subunit
Chain IDs:A (auth: L), C (auth: M)
Chain Length:567
Number of Molecules:2
Biological Source:Citrobacter sp. S-77
UniProt ID:A0A3B6UEP7 Pfam ID:PF00374
Protein Blast
Polymer Type:polypeptide(L)
Description:[NiFe]-hydrogenase 2 small subunit
Chain IDs:B (auth: S), D (auth: T)
Chain Length:335
Number of Molecules:2
Biological Source:Citrobacter sp. S-77
UniProt ID:A0A3B6UEQ0 Pfam ID:PF01058, PF14720
Ligand Molecules
F3S
GOL
MG
NFU
SF4
Primary Citation
Redox-dependent conformational changes of a proximal [4Fe-4S] cluster in Hyb-type [NiFe]-hydrogenase to protect the active site from O2.
Chem.Commun.(Camb.) 54 12385 12388 (2018)
PMID: 30328414 DOI: 10.1039/c8cc06261g

Abstact

Citrobacter sp. S-77 [NiFe]-hydrogenase harbors a standard [4Fe-4S] cluster proximal to the Ni-Fe active site. The presence of relocatable water molecules and a flexible aspartate enables the [4Fe-4S] to display redox-dependent conformational changes. These structural features are proposed to be the key aspects that protect the active site from O2 attack.

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Primary Citation of related structures
5XVB