PhyB-based red/far-red optogenetic checkpoint control system
Multi-Component SwitchThe PhyB-based red/far-red optogenetic checkpoint control system is a multi-component optogenetic platform built around phytochrome B for rapid, reversible light control of protein localization and cell-cycle checkpoint regulation. In fission yeast engineered to produce phycocyanobilin, it enables red/far-red light-dependent recruitment to the plasma membrane, nucleus, and kinetochore, and includes an Opto-G2/M configuration that induces G2/M arrest under red light.