Document Detail

Functional interaction of phytochrome B and cryptochrome 2.
MedLine Citation:
PMID:  11089975     Owner:  NLM     Status:  MEDLINE    
Light is a crucial environmental signal that controls many photomorphogenic and circadian responses in plants. Perception and transduction of light is achieved by at least two principal groups of photoreceptors, phytochromes and cryptochromes. Phytochromes are red/far-red light-absorbing receptors encoded by a gene family of five members (phyA to phyE) in Arabidopsis. Cryptochrome 1 (cry1), cryptochrome 2 (cry2) and phototropin are the blue/ultraviolet-A light receptors that have been characterized in Arabidopsis. Previous studies showed that modulation of many physiological responses in plants is achieved by genetic interactions between different photoreceptors; however, little is known about the nature of these interactions and their roles in the signal transduction pathway. Here we show the genetic interaction that occurs between the Arabidopsis photoreceptors phyB and cry2 in the control of flowering time, hypocotyl elongation and circadian period by the clock. PhyB interacts directly with cry2 as observed in co-immunoprecipitation experiments with transgenic Arabidopsis plants overexpressing cry2. Using fluorescent resonance energy transfer microscopy, we show that phyB and cry2 interact in nuclear speckles that are formed in a light-dependent fashion.
P Más; P F Devlin; S Panda; S A Kay
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Nature     Volume:  408     ISSN:  0028-0836     ISO Abbreviation:  Nature     Publication Date:  2000 Nov 
Date Detail:
Created Date:  2000-11-22     Completed Date:  2000-12-14     Revised Date:  2009-11-19    
Medline Journal Info:
Nlm Unique ID:  0410462     Medline TA:  Nature     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  207-11     Citation Subset:  IM    
Department of Cell Biology and National Science Foundation Center for Biological Timing, The Scripps Research Institute, La Jolla, California 92037, USA.
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MeSH Terms
Arabidopsis / genetics,  growth & development,  physiology
Arabidopsis Proteins
Cell Nucleus / metabolism
Circadian Rhythm / genetics
Drosophila Proteins*
Eye Proteins*
Flavoproteins / genetics,  physiology*
Microscopy, Confocal
Microscopy, Fluorescence
Photoreceptor Cells*
Photoreceptor Cells, Invertebrate*
Phytochrome / genetics,  physiology*
Phytochrome B
Plants, Genetically Modified
Precipitin Tests
Protein Binding
Receptors, G-Protein-Coupled
Recombinant Fusion Proteins / genetics,  metabolism
Transcription Factors*
Reg. No./Substance:
0/Arabidopsis Proteins; 0/CRY1 protein, Arabidopsis; 0/Cryptochromes; 0/Drosophila Proteins; 0/Eye Proteins; 0/Flavoproteins; 0/PHYB protein, Arabidopsis; 0/Receptors, G-Protein-Coupled; 0/Recombinant Fusion Proteins; 0/Transcription Factors; 0/cryptochrome protein, Drosophila; 11121-56-5/Phytochrome; 136250-22-1/Phytochrome B

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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