Keeping the spotlight on cytochrome P450.

Area of Science:

• Biochemistry
• Biotechnology
• Organic Chemistry

Background:

• Cytochrome P450 enzymes are crucial biocatalysts with broad synthetic applications.
• Harnessing P450s using external stimuli like light offers sustainable synthetic routes.
• Visible light photoredox catalysis presents an emerging strategy for P450 activation.

Purpose of the Study:

• To review recent advances in using photosensitizers and visible light to activate P450 enzymes.
• To present the structures and properties of photosensitizers employed for P450 catalysis.
• To discuss distinct approaches for P450 activation via light-mediated processes.

Main Methods:

• Review of literature on photosensitizers (organic, inorganic, nanomaterials, Photosystem I) and their properties.
• Analysis of three primary P450 activation strategies: reactive oxygen species generation, and two electron transfer mechanisms.
• Summarization of achievements and limitations for each activation approach.

Main Results:

• Diverse photosensitizers, including organic dyes, inorganic complexes, nanomaterials, and Photosystem I, have been investigated.
• Three main activation pathways for P450 enzymes using visible light were identified.
• These pathways involve in situ generation of reactive oxygen species or direct electron injection into the heme domain.

Conclusions:

• Visible light and photosensitizers provide versatile tools for P450 enzyme activation.
• Different activation strategies offer distinct advantages and face specific challenges in synthetic applications.
• This approach holds significant promise for advancing P450 biodiversity and biotechnology.