Download MendeleyUnique structural features define the decarboxylation activity of a CYP152 fatty acid decarboxylase from Lacicoccus alkaliphilus.
Phaisan, S., Phintha, A., Trisrivirat, D., Lawan, N., Sucharitakul, J., Charoenpol, A., Watthaisong, P., Tanaka, H., Kurisu, G., Chaiyen, P.(2025) J Biological Chem 301: 110397-110397
- PubMed: 40543591
- DOI: https://doi.org/10.1016/j.jbc.2025.110397
- Primary Citation of Related Structures:
9JQM - PubMed Abstract:
Cytochrome P450 CYP152s catalyze decarboxylation of fatty acids to generate terminal alkenes, valuable compounds for various industries. Here, we identified, overexpressed, and characterized a new CYP152 enzyme from Lacicoccus alkaliphilus (OleT LA ) and compared its biophysical and biochemical properties with the well-studied OleT JE from Jeotgalicoccus sp. 8456. Improved expression protocols gave the highest yields of CYP152 holoenzymes reported to date. OleT LA exhibits twice the catalytic turnover number of OleT JE when using hexadecanoic acid and H 2 O 2 as substrates in 10% (v/v) ethanol (EtOH). The X-ray structure of OleT LA in complex with icosanoic acid revealed a unique flipped heme and a substrate tunnel configuration which are different than those of other CYP152 decarboxylases. Molecular dynamics simulations revealed that in the presence of EtOH, OleT LA displays structural dynamics which maintain structural interactions better than those of OleT JE . As I178 in OleT LA (equivalent to L176 in OleT JE ) shows close interactions with its substrate during simulations, I178L of OleT LA and L176I of OleT JE variants were constructed and investigated for their activities. While L176I in OleT JE caused a significant loss of activity, I178L of OleT LA had activities that were equivalent to or greater than those of the wild-type enzyme, suggesting that overall scaffold of OleT LA is more amenable to mutation than OleT JE . Stopped-flow investigations of OleT LA reactions indicated that EtOH increases the rate constant of Compound I formation. We also identified a new redox partner system, ferredoxin and ferredoxin reductase that can function as effective electron donors for both in vitro and in vivo systems of CYP152s.
Organizational Affiliation:
School of Biomolecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology (VISTEC), Rayong, Thailand.
