Engineering Photosensory Modules of Non-Opsin-Based Optogenetic Actuators

Area of Science:

• Optogenetics and Molecular Biology
• Biophotonics and Protein Engineering

Background:

• Optogenetic actuators, derived from photoreceptors, are crucial for studying cell biology and tissue physiology.
• Current optogenetic tools primarily utilize naturally occurring photoreceptor proteins.
• There is an increasing need for novel photosensory domains with enhanced optical properties and light-induced responses.

Purpose of the Study:

• To review advancements in engineering non-opsin-based photosensory domains.
• To highlight representative applications of these engineered domains in cell biology and physiology.
• To summarize current knowledge on engineering various light-sensitive proteins for optogenetics.

Main Methods:

• Review of literature on engineering of non-opsin photosensory domains.
• Summarization of knowledge on light-sensitive proteins like LOV, CRY2, PhyB, BphP, Dronpa, and PhoCl.
• Analysis of applications in cell biology and physiological studies.

Main Results:

• Progress in engineering non-opsin-based photosensory domains is accelerating.
• Various engineered proteins, including LOV, CRY2, PhyB, BphP, Dronpa, and PhoCl, show promise.
• These novel domains offer improved optical properties and light-induced responses compared to traditional opsins.

Conclusions:

• Engineered non-opsin photosensory domains represent a significant advancement in optogenetics.
• These novel actuators expand the toolkit for biological research, enabling new applications in cell biology and physiology.
• Continued engineering efforts are expected to yield photosensitive proteins with even greater utility.