7WSX image
Entry Detail
PDB ID:
7WSX
Keywords:
Title:
Class III hybrid cluster protein (HCP) C67Y variant from Methanothermobacter marburgensis
Biological Source:
PDB Version:
Deposition Date:
2022-02-02
Release Date:
2023-02-08
Method Details:
Experimental Method:
Resolution:
3.00 Å
R-Value Free:
0.25
R-Value Work:
0.21
R-Value Observed:
0.21
Space Group:
P 1 21 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Hydroxylamine reductase
Chain IDs:A, B
Chain Length:506
Number of Molecules:2
Biological Source:Methanothermobacter marburgensis
Modified Residue
Compound ID Chain ID Parent Comp ID Details 2D Image
CSS A CYS modified residue
Ligand Molecules
Primary Citation
Class III hybrid cluster protein homodimeric architecture shows evolutionary relationship with Ni, Fe-carbon monoxide dehydrogenases.
Nat Commun 14 5609 5609 (2023)
PMID: 37709776 DOI: 10.1038/s41467-023-41289-4

Abstact

Hybrid cluster proteins (HCPs) are Fe-S-O cluster-containing metalloenzymes in three distinct classes (class I and II: monomer, III: homodimer), all of which structurally related to homodimeric Ni, Fe-carbon monoxide dehydrogenases (CODHs). Here we show X-ray crystal structure of class III HCP from Methanothermobacter marburgensis (Mm HCP), demonstrating its homodimeric architecture structurally resembles those of CODHs. Also, despite the different architectures of class III and I/II HCPs, [4Fe-4S] and hybrid clusters are found in equivalent positions in all HCPs. Structural comparison of Mm HCP and CODHs unveils some distinct features such as the environments of their homodimeric interfaces and the active site metalloclusters. Furthermore, structural analysis of Mm HCP C67Y and characterization of several Mm HCP variants with a Cys67 mutation reveal the significance of Cys67 in protein structure, metallocluster binding and hydroxylamine reductase activity. Structure-based bioinformatics analysis of HCPs and CODHs provides insights into the structural evolution of the HCP/CODH superfamily.

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Primary Citation of related structures