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PMID: 11161203 Published · ppublish English Journal Article Research Support, U.S. Gov't, Non-P.H.S. Research Support, U.S. Gov't, P.H.S.

SUB1, an Arabidopsis Ca2+-binding protein involved in cryptochrome and phytochrome coaction.

Science (New York, N.Y.) ·Vol. 291 ·No. 5503 ·2001-01-19 ·Pages 487-90

Guo H, Mockler T, Duong H, Lin C

Abstract

Cryptochromes and phytochromes are the major photosensory receptors in plants and often regulate similar photomorphogenic responses. The molecular mechanisms underlying functional interactions of cryptochromes and phytochromes remain largely unclear. We have identified an Arabidopsis photomorphogenic mutant, sub1, which exhibits hypersensitive responses to blue light and far-red light. Genetic analyses indicate that SUB1 functions as a component of a cryptochrome signaling pathway and as a modulator of a phytochrome signaling pathway. The SUB1 gene encodes a Ca2+-binding protein that suppresses light-dependent accumulation of the transcription factor HY5.

MeSH Terms

Amino Acid Motifs Amino Acid Sequence Arabidopsis/genetics,growth & development,metabolism Arabidopsis Proteins Basic-Leucine Zipper Transcription Factors Calcium-Binding Proteins/chemistry,genetics,metabolism Cryptochromes Darkness Drosophila Proteins Epistasis, Genetic Eye Proteins Flavoproteins/metabolism Gene Expression Regulation, Plant Genes, Plant Light Molecular Sequence Data Mutation Nuclear Proteins/metabolism Phenotype Photoreceptor Cells, Invertebrate Phytochrome/metabolism Phytochrome A Plant Proteins/chemistry,genetics,metabolism Receptors, G-Protein-Coupled Recombinant Fusion Proteins/metabolism Sequence Alignment Signal Transduction

Chemicals

Arabidopsis Proteins Basic-Leucine Zipper Transcription Factors CRY1 protein, Arabidopsis Calcium-Binding Proteins Cryptochromes Drosophila Proteins Eye Proteins Flavoproteins HY5 protein, Arabidopsis Nuclear Proteins PHYA protein, Arabidopsis Phytochrome A Plant Proteins Receptors, G-Protein-Coupled Recombinant Fusion Proteins SUB1 protein, Arabidopsis cry protein, Drosophila Phytochrome

Authors & Affiliations

4 authors, click to expand affiliations / ORCID

Guo H

Department of Molecular, Cell, and Developmental Biology, University of California, Los Angeles, CA 90095, USA.

Mockler T

Duong H

Lin C

Article Info

Journal

Science (New York, N.Y.)

Abbr.

Science

ISSN

0036-8075

DOI

10.1126/science.291.5503.487

Published

2001-01-19

Pages

487-90

Language

English

Region

United States

NLM ID

0404511

Subset

Grants

NIGMS NIH HHS · GM 56265 · United States

External Links

PubMed source DOI: 10.1126/science.291.5503.487 View journal details

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SUB1, an Arabidopsis Ca2+-binding protein involved in cryptochrome and phytochrome coaction.

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