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The plastid sigma factor SIG5 is involved in the diurnal regulation of the chloroplast gene psbD in the moss Physcomitrella patens
Author(s) -
Ichikawa Kazuhiro,
Shimizu Akane,
Okada Ryo,
Satbhai Santosh Balasaheb,
Aoki Setsuyuki
Publication year - 2008
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/j.febslet.2007.12.034
Subject(s) - physcomitrella patens , plastid , biology , gene , transcription factor , microbiology and biotechnology , moss , chloroplast , sigma factor , genetics , transcription (linguistics) , botany , gene expression , promoter , mutant , linguistics , philosophy
We analyzed the function of a plastid sigma factor, SIG5, by targeted gene disruption in the moss Physcomitrella patens . High‐intensity light induced the chloroplast gene psbD in the wild‐type strain (WT), whereas this induction was nullified in the PpSig5 ‐disrupted strains (Δ Sig5 ). Moreover, diurnally regulated changes of psbD transcription showed lowered amplitude in Δ Sig5 than in WT. We concluded that the moss SIG5 mediates multiple layers of signals to intricately regulate psbD transcription.