Similarity of a Chromatic Adaptation Sensor to Phytochrome and Ethylene Receptors

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Science  06 Sep 1996:
Vol. 273, Issue 5280, pp. 1409-1412
DOI: 10.1126/science.273.5280.1409


Complementary chromatic adaptation in cyanobacteria acts through photoreceptors to control the biosynthesis of light-harvesting complexes. The mutant FdBk, which appears black, cannot chromatically adapt and may contain a lesion in the apparatus that senses light quality. The complementing gene identified here, rcaE, encodes a deduced protein in which the amino-terminal region resembles the chromophore attachment domain of phytochrome photoreceptors and regions of plant ethylene receptors; the carboxyl- terminal half is similar to the histidine kinase domain of two-component sensor kinases.

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