Biphenyl-2,3-diol 1,2-dioxygenase

biphenyl-2,3-diol 1,2-dioxygenase
Crystallographic structure of the HsaC extradiol dioxygenase from M. tuberculosis (rainbow colored, N-terminus = blue, C-terminus = red) complexed with 3,4-DHSA (space-filling model (carbon = white, oxygen = red). [1]
Identifiers
EC no.	1.13.11.39
CAS no.	103679-58-9
Databases
IntEnz	IntEnz view
BRENDA	BRENDA entry
ExPASy	NiceZyme view
KEGG	KEGG entry
MetaCyc	metabolic pathway
PRIAM	profile
PDB structures	RCSB PDB PDBe PDBsum
Gene Ontology	AmiGO / QuickGO
Search PMC articles PubMed articles NCBI proteins

Biphenyl-2,3-diol 1,2-dioxygenase (EC 1.13.11.39) is an enzyme that catalyzes the chemical reaction

biphenyl-2,3-diol + O₂${\displaystyle \rightleftharpoons }$ 2-hydroxy-6-oxo-6-phenylhexa-2,4-dienoate + H₂O

Thus, the two substrates of this enzyme are biphenyl-2,3-diol and oxygen, whereas its two products are 2-hydroxy-6-oxo-6-phenylhexa-2,4-dienoate and water.

This enzyme belongs to the family of oxidoreductases, specifically those acting on single donors with O₂ as oxidant and incorporation of two atoms of oxygen into the substrate (oxygenases). The oxygen incorporated need not be derived from O₂. The systematic name of this enzyme class is biphenyl-2,3-diol:oxygen 1,2-oxidoreductase (decyclizing). Other names in common use include 2,3-dihydroxybiphenyl dioxygenase, and biphenyl-2,3-diol dioxygenase. This enzyme participates in gamma-hexachlorocyclohexane degradation and biphenyl degradation.

Structural studies

As of late 2007, 16 structures have been solved for this class of enzymes, with PDB accession codes 1DHY, 1EIL, 1EIQ, 1EIR, 1HAN, 1KMY, 1KND, 1KNF, 1KW3, 1KW6, 1KW8, 1KW9, 1KWB, 1KWC, 1LGT, and 1LKD.

References

1. PDB: 2ZI8 ​; Yam KC, D'Angelo I, Kalscheuer R, Zhu H, Wang JX, Snieckus V, Ly LH, Converse PJ, Jacobs WR, Strynadka N, Eltis LD (March 2009). Ramakrishnan L (ed.). "Studies of a Ring-Cleaving Dioxygenase Illuminate the Role of Cholesterol Metabolism in the Pathogenesis of Mycobacterium tuberculosis". PLOS Pathog. 5 (3): e1000344. doi:10.1371/journal.ppat.1000344. PMC   2652662 . PMID   19300498.

• Utsumi T; Funatsu G (1986). "Induction of superoxide production in polymorphonuclear leukocytes by ricinus lectins and its dependency on lectin valency". Agric. Biol. Chem. 50 (4): 1047–1049. doi: 10.1271/bbb1961.50.1047 .