PF00775

Dioxygenase

Pfam entry
Member databasePfam
Pfam typedomain
Short nameDioxygenase_C
ClanTransthyretin
Author Bateman A;0000-0002-6982-4660
Sequence Ontology0000417

Description
Imported from IPR000627

This entry represents the C-terminal domain common to several intradiol ring-cleavage dioxygenases.

Dioxygenases catalyse the incorporation of both atoms of molecular oxygen into substrates using a variety of reaction mechanisms. Cleavage of aromatic rings is one of the most important functions of dioxygenases, which play key roles in the degradation of aromatic compounds. The substrates of ring-cleavage dioxygenases can be classified into two groups according to the mode of scission of the aromatic ring. Intradiol enzymes use a non-haem Fe(III) to cleave the aromatic ring between two hydroxyl groups (ortho-cleavage), whereas extradiol enzymes (
IPR000486
) use a non-haem Fe(II) to cleave the aromatic ring between a hydroxylated carbon and an adjacent non-hydroxylated carbon (meta-cleavage)
[1]
. These two subfamilies differ in sequence, structural fold, iron ligands, and the orientation of second sphere active site amino acid residues.

Enzymes that belong to the intradiol family include catechol 1,2-dioxygenase (1,2-CTD) (
1.13.11.1
); protocatechuate 3,4-dioxygenase (3,4-PCD) (
1.13.11.3
); and chlorocatechol 1,2-dioxygenase (
1.13.11.1
)
[2]
.

References
Imported from IPR000627

1.Catechol dioxygenases. Broderick JB. Essays Biochem. 34, 173-89, (1999). PMID: 10730195

2.Crystal structure of 4-chlorocatechol 1,2-dioxygenase from the chlorophenol-utilizing gram-positive Rhodococcus opacus 1CP. Ferraroni M, Solyanikova IP, Kolomytseva MP, Scozzafava A, Golovleva L, Briganti F. J. Biol. Chem. 279, 27646-55, (2004). View articlePMID: 15060064

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