RRC ID 56442
Author Kawase Y, Imamura S, Tanaka K.
Title A MYB-type transcription factor, MYB2, represses light-harvesting protein genes in Cyanidioschyzon merolae.
Journal FEBS Lett
Abstract While searching for transcriptional regulators that respond to changes in light regimes, we identified a MYB domain-containing protein, MYB2, that accumulates under dark and other conditions in the unicellular red alga Cyanidioschyzon merolae. The isolation and analysis of a MYB2 mutant revealed that MYB2 represses the expression of the nuclear-encoded chloroplast RNA polymerase sigma factor gene SIG2, which results in the repression of the chloroplast-encoded phycobilisome genes that are under its control. Since nuclear-encoded phycobilisome and other light-harvesting protein genes are also repressed by MYB2, we conclude that MYB2 has a role in repressing the expression of light-harvesting genes. The MYB2 mutant is sensitive to a prolonged dark incubation, indicating the importance of MYB2 for cell viability in the dark.
Volume 591(16)
Pages 2439-2448
Published 2017-8-1
DOI 10.1002/1873-3468.12763
PMID 28748638
MeSH Cell Nucleus / genetics Cell Nucleus / radiation effects Darkness Gene Expression Regulation, Plant / radiation effects Light-Harvesting Protein Complexes / genetics* Mutation Plant Proteins / metabolism* Promoter Regions, Genetic / genetics Rhodophyta / cytology Rhodophyta / genetics* Rhodophyta / metabolism* Rhodophyta / radiation effects Survival Analysis Transcription Factors / genetics Transcription Factors / metabolism*
IF 2.675
Times Cited 1