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Structural basis for the photoconversion of a phytochrome to the activated Pfr form

Author

Listed:
  • Andrew T. Ulijasz

    (Department of Genetics and,)

  • Gabriel Cornilescu

    (National Magnetic Resonance Facility at Madison, University of Wisconsin–Madison, Madison, Wisconsin 53706, USA)

  • Claudia C. Cornilescu

    (National Magnetic Resonance Facility at Madison, University of Wisconsin–Madison, Madison, Wisconsin 53706, USA)

  • Junrui Zhang

    (Department of Genetics and,)

  • Mario Rivera

    (Multidisciplinary Research Building, University of Kansas, Lawrence, Kansas 66057-1620, USA)

  • John L. Markley

    (National Magnetic Resonance Facility at Madison, University of Wisconsin–Madison, Madison, Wisconsin 53706, USA)

  • Richard D. Vierstra

    (Department of Genetics and,)

Abstract

Photoactivated phytochromes Phytochromes are a family of bilin-containing photoreceptors that regulate various processes in plants and microorganisms. These photoreceptors interconvert between a red-light-absorbing ground state (Pr) and a far-red-light-absorbing photoactivated state (Pfr). The structures of the Pr state of several phytochromes have been determined, but little is known about the Pfr state. In this paper, the authors determined that light-induced rotation of the A ring of the bilin is the primary motion of the chromophore during photoconversion. Subsequent rearrangements within the protein then affect intra- and interdomain contact sites within the phytochrome dimer.

Suggested Citation

  • Andrew T. Ulijasz & Gabriel Cornilescu & Claudia C. Cornilescu & Junrui Zhang & Mario Rivera & John L. Markley & Richard D. Vierstra, 2010. "Structural basis for the photoconversion of a phytochrome to the activated Pfr form," Nature, Nature, vol. 463(7278), pages 250-254, January.
    • Handle: RePEc:nat:nature:v:463:y:2010:i:7278:d:10.1038_nature08671
    DOI: 10.1038/nature08671
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    Cited by:

    1. Derren J Heyes & Basile Khara & Michiyo Sakuma & Samantha J O Hardman & Ronan O'Cualain & Stephen E J Rigby & Nigel S Scrutton, 2012. "Ultrafast Red Light Activation of Synechocystis Phytochrome Cph1 Triggers Major Structural Change to Form the Pfr Signalling-Competent State," PLOS ONE, Public Library of Science, vol. 7(12), pages 1-13, December.

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