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Blue light-induced transcription of plastid-encoded psbD gene is mediated by a nuclear-encoded transcription initiation factor, AtSig5.
It is proposed that AtSig5 acts as a mediator of blue light signaling that specifically activates the psbD BLRP in response to blue light in Arabidopsis. Expand
Kid, a novel kinesin‐like DNA binding protein, is localized to chromosomes and the mitotic spindle.
Indirect immunofluorescence studies show that Kid colocalizes with mitotic chromosomes and that it is enriched in the kinetochore at anaphase, suggesting that Kid might play a role in regulating the chromosomal movement along microtubules during mitosis. Expand
Novel nuclear‐encoded proteins interacting with a plastid sigma factor, Sig1, in Arabidopsis thaliana 1
The discovery of the nuclear encoded protein (SibI) that is transported into chloroplasts and interacts specifically with the region 4 of Sig1 in Arabidopsis suggests the transcriptional regulation by sigma factor binding proteins to function in the plastids of higher plant. Expand
Blue light specific and differential expression of a plastid σ factor, Sig5 in Arabidopsis thaliana
It is found that blue light extensively induced the accumulation of SIG5 transcripts, but red light did not and the blue light specificity was not observed in the accumulations of remaining five SIG genes. Expand
Circadian-regulated transcription of the psbD light-responsive promoter in wheat chloroplasts.
The effects of various mutations introduced into the promoter region on the psbD LRP activity in vitro suggest the existence of two positive elements located between -54 and -36, which generally enhance the transcription activity, and an anomalous core promoter structure lacking the functional "-35" element, which plays a crucial role in the circadian fluctuation and light dependency of psb D LRP transcription activity. Expand
Light induction of Arabidopsis SIG1 and SIG5 transcripts in mature leaves: differential roles of cryptochrome 1 and cryptochrome 2 and dual function of SIG5 in the recognition of plastid promoters.
Evidence is presented that AtSIG5 contains determinants for activating the psbD blue-light-responsive promoter (BLRP) in region 4.2 rather than region 2.4, which indicates that Arginine 493 may be involved in psbA promoter recognition. Expand
Electron paramagnetic resonance and mutational analyses revealed the involvement of photosystem II-L subunit in the oxidation step of Tyr-Z by P680+ to form the Tyr-Z+P680Pheo- state in photosystem
Evidence against PSII-L being involved in the electron transfer from Pheo- to QA was obtained by the flash photolysis experiments, andHydropathy profile of PSii-L suggests that it spans the membrane once by a hydrophobic stretch of the carboxyl-terminal side as its car boxyl end to face to the lumen. Expand
Plastid Transcription in Higher Plants
A promoter of the psbD operon, PsbD blue light responsive promoter (psbDBLRP) is a typical example that is under the control of a combination of various signals arising in the nucleus and plastids in response to the tissue specific and developmental stage- and environment-dependent cues. Expand
The role of lipids and 17‐kDa protein in enhancing the recovery of O2 evolution in cholate‐treated thylakoid membranes
The recovery of O2 evolution of cholate‐treated thylakoids induced by the simultaneous addition of the 17‐ and 23‐kDa proteins was enhanced by the further addition of thylakoid total lipids up toExpand
Developmental stage-specific multi-subunit plastid RNA polymerases (PEP) in wheat.
During wheat leaf development, PEP in the leaf base that is functional for most PEP promoters even in the dark is replaced by the light-dependent PEP selectively transcribing the psbA and psbD promoters. Expand