Document Detail

A brief history of phytochromes.
MedLine Citation:
PMID:  20155775     Owner:  NLM     Status:  MEDLINE    
Photosensory proteins enable living things to detect the quantity and quality of the light environment and to transduce that physical signal into biochemical outputs which entrain their metabolism with the ambient light environment. Phytochromes, which photoconvert between red-absorbing P(r) and far-red-absorbing P(fr) states, are the most extensively studied of these interesting proteins. Critical regulators of a number of key adaptive processes in higher plants, including photomorphogenesis and shade avoidance, phytochromes are widespread in photosynthetic and nonphotosynthetic bacteria, and even in fungi. Cyanobacterial genomes also possess a plethora of more distant relatives of phytochromes known as cyanobacteriochromes (CBCRs). Biochemical characterization of representative CBCRs has demonstrated that this class of photosensors exhibits a broad range of wavelength sensitivities, spanning the entire visible spectrum. Distinct protein-bilin interactions are responsible for this astonishing array of wavelength sensitivities. Despite this spectral diversity, all members of the extended family of phytochrome photosensors appear to share a common photochemical mechanism for light sensing: photoisomerization of the 15/16 double bond of the bilin chromophore.
Nathan C Rockwell; J Clark Lagarias
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, U.S. Gov't, Non-P.H.S.; Review    
Journal Detail:
Title:  Chemphyschem : a European journal of chemical physics and physical chemistry     Volume:  11     ISSN:  1439-7641     ISO Abbreviation:  Chemphyschem     Publication Date:  2010 Apr 
Date Detail:
Created Date:  2010-04-27     Completed Date:  2010-07-19     Revised Date:  2014-09-16    
Medline Journal Info:
Nlm Unique ID:  100954211     Medline TA:  Chemphyschem     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  1172-80     Citation Subset:  IM    
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MeSH Terms
Bacterial Proteins / chemistry,  metabolism
Cyanobacteria / metabolism
Phytochrome / chemistry*,  metabolism
Protein Kinases / chemistry,  metabolism
Protein Structure, Tertiary
Grant Support
Reg. No./Substance:
0/Bacterial Proteins; 0/Cph2 protein, bacteria; 11121-56-5/Phytochrome; EC 2.7.-/Protein Kinases; EC 2.7.3.-/Cph1 phytochrome protein, bacteria

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