A Cyanobacterial Phytochrome Two-Component Light Sensory System
|Title||A Cyanobacterial Phytochrome Two-Component Light Sensory System|
|Publication Type||Journal Article|
|Year of Publication||1997|
|Authors||Yeh, K-C., Wu S-H., Murphy J. T., & Lagarias C. J.|
|Pagination||1505 - 1508|
The biliprotein phytochrome regulates plant growth and developmental responses to the ambient light environment through an unknown mechanism. Biochemical analyses demonstrate that phytochrome is an ancient molecule that evolved from a more compact light sensor in cyanobacteria. The cyanobacterial phytochrome Cph1 is a light-regulated histidine kinase that mediates red, far-red reversible phosphorylation of a small response regulator, Rcp1 (response regulator for cyanobacterial phytochrome), encoded by the adjacent gene, thus implicating protein phosphorylation-dephosphorylation in the initial step of light signal transduction by phytochrome.