1ULJ

Biphenyl dioxygenase (BphA1A2) in complex with the substrate

Summary for 1ULJ

• Entry DOI: 10.2210/pdb1ulj/pdb
• Related: 1ULI
• Descriptor: biphenyl dioxygenase large subunit, biphenyl dioxygenase small subunit, FE (II) ION, ... (6 entities in total)
• Functional Keywords: alpha3 beta3 hetero hexamer, oxidoreductase
• Biological source: Rhodococcus sp.; More
• Total number of polymer chains: 6
• Total formula weight: 222240.86

Authors

Furusawa, Y.,Nagarajan, V.,Masai, E.,Tanokura, M.,Fukuda, M.,Senda, T. (deposition date: 2003-09-12, release date: 2004-09-28, Last modification date: 2023-12-27)

Primary citation

Furusawa, Y.,Nagarajan, V.,Tanokura, M.,Masai, E.,Fukuda, M.,Senda, T.
Crystal Structure of the Terminal Oxygenase Component of Biphenyl Dioxygenase Derived from Rhodococcus sp. Strain RHA1
J.Mol.Biol., 342:1041-1052, 2004

PubMed Abstract: Biphenyl dioxygenase is the enzyme that catalyzes the stereospecific dioxygenation of the aromatic ring. This enzyme has attracted the attention of researchers due to its ability to oxidize polychlorinated biphenyls, which is one of the serious environmental contaminants. We determined the crystal structure of the terminal oxygenase component of the biphenyl dioxygenase (BphA1A2) derived from Rhodococcus strain sp. RHA1 in substrate-free and complex forms. These crystal structures revealed that the substrate-binding pocket makes significant conformational changes upon substrate binding to accommodate the substrate into the pocket. Our analysis of the crystal structures suggested that the residues in the substrate-binding pocket can be classified into three groups, which, respectively, seem to be responsible for the catalytic reaction, the orientation/conformation of the substrate, and the conformational changes of the substrate-binding pocket. The cooperative actions of residues in the three groups seem to determine the substrate specificity of the enzyme.

PubMed: 15342255
DOI: 10.1016/j.jmb.2004.07.062

Experimental method

X-RAY DIFFRACTION (2.6 Å)