Download MendeleyCharacterization of high-H 2 O 2 -tolerant bacterial cytochrome P450 CYP105D18: insights into papaverine N-oxidation.
Pardhe, B.D., Do, H., Jeong, C.S., Kim, K.H., Lee, J.H., Oh, T.J.(2021) IUCrJ 8: 684-694
- PubMed: 34258016
- DOI: https://doi.org/10.1107/S2052252521005522
- Primary Citation of Related Structures:
7DI3, 7DLS - PubMed Abstract:
The bacterial CYP105 family is involved in secondary metabolite biosynthetic pathways and plays essential roles in the biotransformation of xenobiotics. This study investigates the newly identified H 2 O 2 -mediated CYP105D18 from Streptomyces laurentii as the first bacterial CYP for N-oxidation. The catalytic efficiency of CYP105D18 for papaverine N-oxidation was 1.43 s -1 µ M -1 . The heme oxidation rate ( k ) was low (<0.3 min -1 ) in the presence of 200 m M H 2 O 2 . This high H 2 O 2 tolerance capacity of CYP105D18 led to higher turnover prior to heme oxidation. Additionally, the high-resolution papaverine complexed structure and substrate-free structure of CYP105D18 were determined. Structural analysis and activity assay results revealed that CYP105D18 had a strong substrate preference for papaverine because of its bendable structure. These findings establish a basis for biotechnological applications of CYP105D18 in the pharmaceutical and medicinal industries.
Organizational Affiliation:
Department of Life Science and Biochemical Engineering, Graduate School, SunMoon University, Asan 31460, Republic of Korea.
