1T93

Evidence for Multiple Substrate Recognition and Molecular Mechanism of C-C reaction by Cytochrome P450 CYP158A2 from Streptomyces Coelicolor A3(2)

Summary for 1T93

• Entry DOI: 10.2210/pdb1t93/pdb
• Related: 1S1F 1SE6
• Descriptor: putative cytochrome P450, PROTOPORPHYRIN IX CONTAINING FE, FLAVIOLIN, ... (4 entities in total)
• Functional Keywords: streptomyces, cytochrome p450 oxidoreductase, cyp158a2, substrate recognition, molecular mechanism, oxidoreductase
• Biological source: Streptomyces coelicolor
• Total number of polymer chains: 1
• Total formula weight: 45579.44

Authors

Zhao, B.,Sundaramoorthy, M.,Waterman, M.R. (deposition date: 2004-05-14, release date: 2005-01-25, Last modification date: 2023-08-23)

Primary citation

Zhao, B.,Guengerich, F.P.,Bellamine, A.,Lamb, D.C.,Izumikawa, M.,Lei, L.,Podust, L.M.,Sundaramoorthy, M.,Kalaitzis, J.A.,Reddy, L.M.,Kelly, S.L.,Moore, B.S.,Stec, D.,Voehler, M.,Falck, J.R.,Shimada, T.,Waterman, M.R.
Binding of Two Flaviolin Substrate Molecules, Oxidative Coupling, and Crystal Structure of Streptomyces coelicolor A3(2) Cytochrome P450 158A2.
J.Biol.Chem., 280:11599-11607, 2005

PubMed Abstract: Cytochrome P450 158A2 (CYP158A2) is encoded within a three-gene operon (sco1206-sco1208) in the prototypic soil bacterium Streptomyces coelicolor A3(2). This operon is widely conserved among streptomycetes. CYP158A2 has been suggested to produce polymers of flaviolin, a pigment that may protect microbes from UV radiation, in combination with the adjacent rppA gene, which encodes the type III polyketide synthase, 1,3,6,8-tetrahydroxynaphthalene synthase. Following cloning, expression, and purification of this cytochrome P450, we have shown that it can produce dimer and trimer products from the substrate flaviolin and that the structures of two of the dimeric products were established using mass spectrometry and multiple NMR methods. A comparison of the x-ray structures of ligand-free (1.75 angstroms) and flaviolin-bound (1.62 angstroms) forms of CYP158A2 demonstrates a major conformational change upon ligand binding that closes the entry into the active site, partly due to repositioning of the F and G helices. Particularly interesting is the presence of two molecules of flaviolin in the closed active site. The flaviolin molecules form a quasi-planar three-molecule stack including the heme of CYP158A2, suggesting that oxidative C-C coupling of these phenolic molecules leads to the production of flaviolin dimers.

PubMed: 15659395
DOI: 10.1074/jbc.M410933200

Experimental method

X-RAY DIFFRACTION (1.62 Å)