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COG1-A master transcription factor regulating photosynthesis

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Molecular Plant 2023年第12期16卷 1890-1892页

作者： Jan Ferdinand Penzler tatjana kle.ne.dario le.ste. Plant Molecular Biology Faculty of BiologyLudwig-Maximilians-University(LMU)MunichMartinsried-Planegg82152 MunichGermany

COG1 CAneNHANCE PHOTOSYNTHESIS AND PLANT GROWTH Recently,Wei et al.(2023)report that overexpression or a gain-offunction mutation of COGWHEEL1(COG1)gene,which encodes a transcription factor belonging to the DNA binding with one finger(Dof)protein family,can increase growth and biomass in Arabidopsis ***,overexpression of any of its six paralogs,CYCLING DOF FACTORS 1-6,also leads to increased growth and biomass production,implying that these seven Dof proteins have partially redundant ***,several of the seven Dof genes must be knocked out to significantly reduce growth and biomass production;the septuple mutants show severely reduced growth but are still ***1 positively modulates the accumulation of transcripts of several photosynthetic genes and,in turn,the corresponding proteins and binds to the promoters of most LHC *** in gene expression related to photosynthesis increase the efficiency of *** of two closely related Brassica rapa COG1 homologs in *** or Arabidopsis COG1 in Nicotiana benthamiana,could cause an increase in growth and biomass *** results indicate that the effects of COG1 are not confined to a specific species.

关键词： species. functions. Arabidopsis

Identification of Target Genes and Transcription Factors Implicated in Translation-Dependent Retrograde Sig- naling in Arabidopsis

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Molecular Plant 2014年第7期7卷 1228-1247页

作者： dario le.ste. Isidora Romani Lukas Mittermayr Francesca Paieri Elena Fenino tatjana kleine Plant Molecular Biology (Botany) Department Biology I Ludwig-Maximilians-University Munich Gro0haderner Str. 2 D-82152Martinsried Germany

Changes in organellar gene expression （OGE） trigger retrograde signaling. The molecular dissection of OGE-dependent retrograde signaling based on analyses of mutants with altered OGE is complicated by compensatory responses that mask the primary signaling defect and by secondary effects that influence other retrograde signaling pathways. Therefore, to identify the earliest effects of altered OGE on nuclear transcript accumulation, we have induced OGE defects in adult plants by ethanol-dependent repression of PRORS1, which encodes a prolyl-tRNA synthetase located in chloroplasts and mitochondria. After 32 h of PRORS1 repression, the translational capacity of chloroplasts was reduced, and this effect subsequently intensified, while basic photosynthetic parameters were still unchanged at 51 h. Analysis of changes in whole-genome transcriptomes during exposure to ethanol revealed that induced PRORS1 silencing affects the expression of 1020 genes in all. Some of these encode photosynthesis-related proteins, including several down-regulated light-harvesting chlorophyll a/b binding （LHC） proteins. Interestingly, genes for presumptive endoplasmic reticulum pro- teins are transiently up-regulated. Furthermore, several NAC-domain-containing proteins are among the transcription factors regulated. Candidate cis-acting elements which may coordinate the transcriptional co-regulation of genes sets include both G-box variants and sequence motifs with no similarity to known plant c/s-elements.

关键词： Arabidopsis chloroplast mitochondrion retrograde signaling target genes transcription factors cis-elements.

Meta-Analysis of Retrograde Signaling in Arabidopsis thaliana Reveals a Core Module of Genes Embedded in Complex Cellular Signaling networks

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Molecular Plant 2014年第7期7卷 1167-1190页

作者： Christine GlaiBer Georg Haberer Iris Finkemeier Thomas Pfannschmidt tatjana kle.ne.dario le.ste. KarI-Josef Dietz Rainer Erich Haiusler Bernhard Grimm Klaus Franz Xaver Mayer Helmholtz Zentrum Munchen German Research Center for Environmental Health Institute of Bioinformatics and Systems Biology(IBIS) Ingolstadter Landstr. 1 D-85764 Neuherberg Germany Biozentrum der LMU Munchen Department of Biologie I-Botanik Groβhaderner Str. 2-4 D-82152 Planegg-Martinsried Germany Friedrich-Schiller-Universitat Jena Institut fur AIIgemeine Botanik und Pflanzenphysiologie Dornburger Str. 159 D-07743 JenaGermany Laboratoire de Physiologie Cellulaire Vegetale (LPCV) CEA/CNRS/UJF iRTSV CEA Grenoble 17 rue des Martyrs 38054 Grenoble cedex 9France Biochemistry and Physiology of Plants Faculty of Biology Bielefeld University Universit~tsstrai3e 25 D-33615 Bielefeld Germany University of Cologne Botanical Institute Cologne Biocenter Zu1picher Str. 47B D-50674 Cologne Germany Humboldt-Universitat zu Berlin Institut fur Biologie AG Pflanzenphysiologie Philippstrasse 13 D-10115 Berlin Germany

Plastid-to-nucleus signaling is essential for the coordination and adjustment of cellular metabolism in response to environmental and developmental cues of plant cells. A variety of operational retrograde signaling path- ways have been described that are thought to be triggered by reactive oxygen species, photosynthesis redox imbalance, tetrapyrrole intermediates, and other metabolic traits. Here we report a meta-analysis based on transcriptome and pro- tein interaction data. Comparing the output of these pathways reveals the commonalities and peculiarities stimulated by six different sources impinging on operational retrograde signaling. Our study provides novel insights into the interplay of these pathways, supporting the existence of an as-yet unknown core response module of genes being regulated under all conditions tested. Our analysis further highlights affiliated regulatory cis-elements and classifies abscisic acid and auxin-based signaling as secondary components involved in the response cascades following a plastidial signal. Our study provides a global analysis of structure and interfaces of different pathways involved in plastid-to-nucleus signaling and a new view on this complex cellular communication network.

关键词： retrograde signaling meta-analysis abscisic acid auxin.

Retrograde signaling in plants: A critical review focusing on the GUN pathway and beyond

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Plant Communications 2023年第1期4卷 304-323页

作者： Andreas S.Richter Thomas Nägele Bernhard Grimm Kerstin Kaufmann Michael Schroda dario le.ste. tatjana kleine Physiology of Plant Metabolism Institute for BiosciencesUniversity of RostockAlbert-Einstein-Str.318059 RostockGermany Plant Evolutionary Cell Biology Faculty of BiologyLudwig-Maximilians-Universität München82152 Planegg-MartinsriedGermany Institute of Biology/Plant Physiology Humboldt-Universität zu BerlinPhilippstr.1310115 BerlinGermany Plant Cell and Molecular Biology Institute of BiologyHumboldt-Universität zu BerlinPhilippstr.1310115 BerlinGermany Molecular Biotechnology and Systems Biology TU KaiserslauternKaiserslauternGermany Plant Molecular Biology(Botany) Faculty of BiologyLudwig-Maximilians-Universität München82152 Planegg-MartinsriedGermany

Plastids communicate their developmental and physiological status to the nucleus via retrograde signaling,allowing nuclear gene expression to be adjusted *** during plastid biogenesis and responses of mature chloroplasts to environmental changes are designated“biogenic”and“operational”controls,respectively.A prominent example of the investigation of biogenic signaling is the screen for gun(genomes uncoupled)*** the first five gun mutants were identified 30 years ago,the functions of GUN proteins in retrograde signaling remain controversial,and that of GUN1 is hotly ***,we provide background information and critically discuss recently proposed concepts that address GUN-related signaling and some novel gun ***,considering heme as a candidate in retrograde signaling,we revisit the spatial organization of heme biosynthesis and export from *** this review focuses on GUN pathways,we also highlight recent progress in the identification and elucidation of chloroplast-derived signals that regulate the acclimation response in green algae and ***,stress-induced accumulation of unfolded/misassembled chloroplast proteins evokes a chloroplast-specific unfolded protein response,which leads to changes in the expression levels of nucleus-encoded chaperones and proteases to restore plastid protein *** also address the importance of chloroplast-derived signals for activation of flavonoid biosynthesis leading to production of anthocyanins during stress acclimation through sucrose non-fermenting 1-related protein kinase ***,a framework for identification and quantification of intercompartmental signaling cascades at the proteomic and metabolomic levels is provided,and we discuss future directions of dissection of organelle-nucleus communication.

关键词： chloroplast chloroplast unfolded protein response genomes uncoupled gun retrograde signaling subcellular proteomes subcellular metabolomes