PR00090

RNGDIOXGNASE

PRINTS entry
Member databasePRINTS
PRINTS typefamily
Short nameRNGDIOXGNASE

Description
Imported from IPR001663

Aromatic ring hydroxylating dioxygenases are multicomponent 1,2-dioxygenase complexes that convert closed-ring structures to non-aromatic cis-diols
[1]
. The complex has both hydroxylase and electron transfer components. The hydroxylase component is itself composed of two subunits: an alpha-subunit of about 50kDa, and a beta-subunit of about 20kDa. The electron transfer component is either composed of two subunits: a ferredoxin and a ferredoxin reductase or by a single bifunctional ferredoxin/reductase subunit. Sequence analysis of hydroxylase subunits of ring hydroxylating systems (including toluene, benzene and napthalene 1,2-dioxygenases) suggests they are derived from a common ancestor
[1]
. The alpha-subunit binds both a Rieske-like 2Fe-2S cluster and an iron atom: conserved Cys and His residues in the N-terminal region may provide 2Fe-2S ligands, while conserved His and Tyr residues may coordinate the iron. The beta subunit may be responsible for the substrate specificity of the dioxygenase system
[1]
.

References
Imported from IPR001663

1.Nucleotide sequences of the Acinetobacter calcoaceticus benABC genes for benzoate 1,2-dioxygenase reveal evolutionary relationships among multicomponent oxygenases. Neidle EL, Hartnett C, Ornston LN, Bairoch A, Rekik M, Harayama S. J. Bacteriol. 173, 5385-95, (1991). View articlePMID: 1885518

Supplementary References

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