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The multitalented microbial sensory rhodopsins.

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Affiliations

  • 1. Center for Membrane Biology, Department of Biochemistry and Molecular Biology, University of Texas Medical School at Houston, Houston, TX 77030, USA.
      Authors
    • Spudich JL 1
    (1 author)

Trends in Microbiology, 26 Sep 2006, 14(11):480-487
https://doi.org/10.1016/j.tim.2006.09.005 PMID: 17005405 

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Abstract 

Sensory rhodopsins are photoactive, membrane-embedded seven-transmembrane helix receptors that use retinal as a chromophore. They are widespread in the microbial world in each of the three domains of life: Archaea, Bacteria and Eukarya. A striking characteristic of these photoreceptors is their different modes of signaling in different organisms, including interaction with other membrane proteins, interaction with cytoplasmic transducers and light-controlled Ca(2+) channel activity. More than two decades since the discovery of the first sensory rhodopsins in the archaeon Halobacterium salinarum, genome projects have revealed a widespread presence of homologous photosensors. New work on cyanobacteria, algae, fungi and marine proteobacteria is revealing how evolution has modified the common design of these proteins to produce a remarkably rich diversity in their signaling biochemistry.

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Read article at publisher's site: https://doi.org/10.1016/j.tim.2006.09.005

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