Photo-Regulated and Photo-Cleavable Oligonucleotides

Photo-regulated oligonucleotides contain photolabile protecting groups or photo-responsive structural elements that undergo wavelength-dependent photochemical activation. These chemistries enable precise control over activation kinetics, spatial localization, and functional state, allowing oligonucleotides to be selectively activated, cleaved, or structurally modulated for controlled experiments in molecular biology, cellular imaging, synthetic biology, and nucleic acid nanotechnology.

These systems are widely used in optochemical biology, light-controlled gene expression, and dynamic nucleic acid nanostructures, where external optical triggers replace chemical or enzymatic activation.

Photoregulation efficiency depends on photolysis quantum yield, steric blocking efficiency, and local duplex destabilization effects introduced by the modification, all of which influence activation kinetics and functional recovery.

Two major classes dominate this area. Photocaged oligonucleotides use light-removable protecting groups to block hybridization, enzymatic recognition, or functional activity until illumination removes the cage. Photo-cleavable oligonucleotide systems use light-sensitive linkers, spacers, or terminal handles that break upon illumination to release cargo, restore activity, or trigger structural rearrangement.

These strategies are especially useful for spatiotemporal control of gene regulation, triggered molecular release, light-activated affinity workflows, optochemical biology, and dynamic DNA nanostructure control. Depending on the photochemical group, activation may occur under UV light or, in selected systems, under longer visible wavelengths that may be more biologically compatible.

All modifications are compatible with standard solid-phase phosphoramidite synthesis, enabling site-specific incorporation at internal or terminal positions.

All modifications are compatible with standard solid-phase phosphoramidite synthesis, enabling site-specific incorporation at internal or terminal positions.

The product groups below are organized by photochemical function so users can quickly scan photocleavable biotin options, caged nucleobases, photo-switchable systems, and light-cleavable linkers or handles.

1. Young DD, Deiters A. Photochemical control of biological processes. ACS Chemical Biology. 2007.
2. Klan P et al. Photoremovable protecting groups in chemistry and biology. Chemical Reviews. 2013.
3. Deiters A. Light activation as a method of regulating and studying gene expression. Current Opinion in Chemical Biology. 2009.
4. Representative literature on photocaged nucleotides, azobenzene photo-switches, and light-cleavable oligonucleotide linker systems.