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Nature. 1984 Dec 6-12;312(5994):509-13.

Mechanism of colour discrimination by a bacterial sensory rhodopsin.

Abstract

A photosensitive protein resembling the visual pigments of invertebrates enables phototactic archaebacteria to distinguish colour. This protein exists in two spectrally-distinct forms, one of which is a transient photoproduct of the other and each of which undergoes photochemical reactions controlling the cell's swimming behaviour. Activation of a single pigment molecule in the cell is sufficient to signal the flagellar motor. This signal-transduction mechanism makes evident a colour-sensing capability inherent in the retinal/protein chromophore.

PMID:
6504161
PMCID:
PMC4996264
DOI:
10.1038/312509a0
[Indexed for MEDLINE]
Free PMC Article

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