Arabidopsis thaliana cryptochrome 2 (AtCRY2), a light-sensitive photosensory protein, was previously adapted for use in controlling protein-protein interactions through light-dependent binding to a partner protein, CIB1. While the existing CRY2-CIB dimerization system has been used extensively for optogenetic applications, some limitations exist. Here, we set out to optimize function of the CRY2-CIB system by identifying versions of CRY2-CIB that are smaller, show reduced dark interaction, and maintain longer or shorter signaling states in response to a pulse of light. Izotope Ozone 4 Keygen Crack. We describe minimal functional CRY2 and CIB1 domains maintaining light-dependent interaction and new signaling mutations affecting AtCRY2 photocycle kinetics. The latter work implicates an α13-α14 turn motif within plant CRYs whose perturbation alters signaling-state lifetime.

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A320 Glass Cockpit Software Programs. Using a long-lived L348F photocycle mutant, we engineered a second-generation photoactivatable Cre recombinase, PA-Cre2.0, that shows five-fold improved dynamic range, allowing robust recombination following exposure to a single, brief pulse of light. Arabidopsis thaliana cryptochrome 2 ( AtCRY2), a light-sensitive photosensory protein, was previously adapted for use controling protein-protein interactions through light-dependent binding to a partner protein, CIB1.

While the existing CRY2/CIB dimerization system has been used extensively for optogenetic applications, some limitations exist. Here, we set out to optimize function of the CRY2/CIB system, to identify versions of CRY2/CIB that are smaller, show reduced dark interaction, and maintain longer or shorter signaling states in response to a pulse of light. We describe minimal functional CRY2 and CIB1 domains maintaining light-dependent interaction and new signaling mutations affecting AtCRY2 photocycle kinetics. The latter work implicates a α13-α14 turn motif within plant CRYs where perturbations alter signaling state lifetime. Using a long-lived L348F photocycle mutant, we engineered a second generation photoactivatable Cre recombinase, PA-Cre2.0, that shows five-fold improved dynamic range allowing robust recombination following exposure to a single, brief pulse of light.