Biphenyl 2,3-dioxygenase subunit beta - Q53123 (BPHA2_RHOJR)


Protein Feature View of PDB entries mapped to a UniProtKB sequence  

  • Number of PDB entries for Q53123: 2
Part of the oxygenase component of the biphenyl dioxygenase system that catalyzes the stereospecific dihydroxylation of the aromatic ring of biphenyl, yielding a dihydrodiol compound. Is likely involved in biphenyl degradation that allows growth of Rhodococcus sp. strain RHA1 on biphenyl as the sole source of carbon and energy. Can also use naphtalene and 4-chlorobiphenyl (4-CB) as substrates, as well as some polychlorinated biphenyls (PCB) such as 2,2'-dichlorobiphenyl, 2,3-dichlorobiphenyl and 2,5,2'-trichlorobiphenyl. Exhibits weak activity toward dibenzofuran and dibenzo-p-dioxin. Electrons are transferred from NADH to the [2Fe-2S] cluster in BphA1 via FAD of BphA4 and [2Fe-2S] cluster of BphA3. UniProt
Catalytic Activity
Biphenyl + NADH + O2 = 1S,2R-3-phenylcyclohexa-3,5-diene-1,2-diol + NAD+. UniProt
Pathway Maps
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Subunit Structure
Heterohexamer consisting of three BphA1 subunits and three BphA2 subunits. The multicomponent biphenyl dioxygenase system is composed of a ferredoxin reductase (BphA4), a ferredoxin (BphA3), and a terminal oxygenase (BphA1A2). UniProt
  • Other Gene names: bphA2, bphAb, RHA1_ro08059
This protein in other organisms (by gene name):
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  • Red: potentially disorderd region
  • Blue: probably ordered region.
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  • Blue: hydrophilic.
Data in lilac represent the genomic exon structure projected onto the UniProt sequence.
Data in blue originates from PDB
  • Secstruc: Secondary structure projected from representative PDB entries onto the UniProt sequence.
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Validation Track

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The PDB to UniProt mapping is based on the data provided by the EBI SIFTS project. See also Velankar et al., Nucleic Acids Research 33, D262-265 (2005).
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