Photoreceptors
- Page ID
- 494
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at (Workbench/LarsenLab/Research/PhotoBiology/Photoreceptors), /content/body/pre, line 1, column 1
Photoactive Yellow Protein (PYP) is a small, 125 residue, water-soluble protein and a member of the xanthopsin photoreceptor family. PYP can be isolated from the purple phototropic eubacterium Halorhodospira halophila, and is presumed responsible for the initial steps of the homeostatic pathway that results in the negative phototaxis of the bacterium to blue light. In the past decade, PYP has become a model system for studying the photo-initiation and ensuing dynamics of photoreceptor proteins. We are particularly interested in three aspects of the PYP photocycle:
- Primary photochemistry
- Functional protein dynamics and unfolding
- Signaling state formation, particularly within the context of the common structure of the PAS-domain family.
PYP Photocycle