Redox Brake Regulator RedB and FnrL Function as Yin-Yang Regulators of Anaerobic-Aerobic Metabolism in Rhodobacter capsulatus

ABSTRACT We recently described a new member of the CRP (cyclic AMP receptor protein)/FNR (fumarate and nitrate reductase regulatory protein) family called RedB, an acronym for redox brake, that functions to limit the production of ATP and NADH. This study shows that the RedB regulon significantly overlaps the FnrL regulon, with 199 genes being either directly or indirectly regulated by both of these global regulatory proteins. Among these 199 coregulated genes, 192 are divergently regulated, indicating that RedB functions as an antagonist of FnrL. Chromatin immunoprecipitation sequencing (ChIP-seq) analysis indicates that RedB and Fnr directly coregulate only 4 out of 199 genes. The primary mechanism for the divergent regulation of target genes thus involves indirect regulation by both RedB and FnrL (156 cases). Additional regulation involves direct binding by RedB and indirect regulation by FnrL (36 cases) or direct binding by FnrL and indirect regulation by RedB (3 cases). Analysis of physiological pathways under direct and indirect control by these global regulators demonstrates that RedB functions primarily to limit energy production, while FnrL functions to enhance energy production. This regulation includes glycolysis, gluconeogenesis, photosynthesis, hydrogen oxidation, electron transport, carbon fixation, lipid biosynthesis, and protein synthesis. Finally, we show that 75% of genomes from diverse species that code for RedB proteins also harbor genes coding for FNR homologs. This cooccurrence indicates that RedB likely has an important role in buffering FNR-mediated energy production in a broad range of species. IMPORTANCE The CRP/FNR family of regulatory proteins constitutes a large collection of related transcription factors, several of which globally regulate cellular energy production. A well-characterized example is FNR (called FnrL in Rhodobacter capsulatus), which is responsible for regulating the expression of numerous genes that promote maximal energy production and growth under anaerobic conditions. In a companion article (N. Ke, J. E. Kumka, M. Fang, B. Weaver, et al., Microbiol Spectr 10:e02353-22, 2022, https://doi.org/10.1128/Spectrum02353-22), we identified a new subgroup of the CRP/FNR family and demonstrated that a member of this new subgroup, called RedB, has a role in limiting cellular energy production. In this study, we show that numerous genes encompassing the RedB regulon significantly overlap genes that are members of the FnrL regulon. Furthermore, 97% of the genes that are members of both the RedB and FnrL regulons are divergently regulated by these two transcription factors. RedB thus functions as a buffer limiting the amount of energy production that is promoted by FnrL. Ausführliche Beschreibung

Gespeichert in:

Autor*in:	Nijia Ke [verfasserIn] Joseph E. Kumka [verfasserIn] Mingxu Fang [verfasserIn] Brian Weaver [verfasserIn] Judith N. Burstyn [verfasserIn] Carl E. Bauer [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2022

Schlagwörter:	FNR ortholog transcriptomics redox regulation global transcription factor binding photosynthetic bacterium

Übergeordnetes Werk:	In: Microbiology Spectrum - American Society for Microbiology, 2022, 10(2022), 5
Übergeordnetes Werk:	volume:10 ; year:2022 ; number:5

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc

DOI / URN:	10.1128/spectrum.02354-22

Katalog-ID:	DOAJ083937277

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allfields	10.1128/spectrum.02354-22 doi (DE-627)DOAJ083937277 (DE-599)DOAJ5f8bcb0993e84985bad63a36237b373c DE-627 ger DE-627 rakwb eng QR1-502 Nijia Ke verfasserin aut Redox Brake Regulator RedB and FnrL Function as Yin-Yang Regulators of Anaerobic-Aerobic Metabolism in Rhodobacter capsulatus 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier ABSTRACT We recently described a new member of the CRP (cyclic AMP receptor protein)/FNR (fumarate and nitrate reductase regulatory protein) family called RedB, an acronym for redox brake, that functions to limit the production of ATP and NADH. This study shows that the RedB regulon significantly overlaps the FnrL regulon, with 199 genes being either directly or indirectly regulated by both of these global regulatory proteins. Among these 199 coregulated genes, 192 are divergently regulated, indicating that RedB functions as an antagonist of FnrL. Chromatin immunoprecipitation sequencing (ChIP-seq) analysis indicates that RedB and Fnr directly coregulate only 4 out of 199 genes. The primary mechanism for the divergent regulation of target genes thus involves indirect regulation by both RedB and FnrL (156 cases). Additional regulation involves direct binding by RedB and indirect regulation by FnrL (36 cases) or direct binding by FnrL and indirect regulation by RedB (3 cases). Analysis of physiological pathways under direct and indirect control by these global regulators demonstrates that RedB functions primarily to limit energy production, while FnrL functions to enhance energy production. This regulation includes glycolysis, gluconeogenesis, photosynthesis, hydrogen oxidation, electron transport, carbon fixation, lipid biosynthesis, and protein synthesis. Finally, we show that 75% of genomes from diverse species that code for RedB proteins also harbor genes coding for FNR homologs. This cooccurrence indicates that RedB likely has an important role in buffering FNR-mediated energy production in a broad range of species. IMPORTANCE The CRP/FNR family of regulatory proteins constitutes a large collection of related transcription factors, several of which globally regulate cellular energy production. A well-characterized example is FNR (called FnrL in Rhodobacter capsulatus), which is responsible for regulating the expression of numerous genes that promote maximal energy production and growth under anaerobic conditions. In a companion article (N. Ke, J. E. Kumka, M. Fang, B. Weaver, et al., Microbiol Spectr 10:e02353-22, 2022, https://doi.org/10.1128/Spectrum02353-22), we identified a new subgroup of the CRP/FNR family and demonstrated that a member of this new subgroup, called RedB, has a role in limiting cellular energy production. In this study, we show that numerous genes encompassing the RedB regulon significantly overlap genes that are members of the FnrL regulon. Furthermore, 97% of the genes that are members of both the RedB and FnrL regulons are divergently regulated by these two transcription factors. RedB thus functions as a buffer limiting the amount of energy production that is promoted by FnrL. FNR ortholog transcriptomics redox regulation global transcription factor binding photosynthetic bacterium Microbiology Joseph E. Kumka verfasserin aut Mingxu Fang verfasserin aut Brian Weaver verfasserin aut Judith N. Burstyn verfasserin aut Carl E. Bauer verfasserin aut In Microbiology Spectrum American Society for Microbiology, 2022 10(2022), 5 (DE-627)816693293 (DE-600)2807133-5 21650497 nnns volume:10 year:2022 number:5 https://doi.org/10.1128/spectrum.02354-22 kostenfrei https://doaj.org/article/5f8bcb0993e84985bad63a36237b373c kostenfrei https://journals.asm.org/doi/10.1128/spectrum.02354-22 kostenfrei https://doaj.org/toc/2165-0497 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_252 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 10 2022 5
spelling	10.1128/spectrum.02354-22 doi (DE-627)DOAJ083937277 (DE-599)DOAJ5f8bcb0993e84985bad63a36237b373c DE-627 ger DE-627 rakwb eng QR1-502 Nijia Ke verfasserin aut Redox Brake Regulator RedB and FnrL Function as Yin-Yang Regulators of Anaerobic-Aerobic Metabolism in Rhodobacter capsulatus 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier ABSTRACT We recently described a new member of the CRP (cyclic AMP receptor protein)/FNR (fumarate and nitrate reductase regulatory protein) family called RedB, an acronym for redox brake, that functions to limit the production of ATP and NADH. This study shows that the RedB regulon significantly overlaps the FnrL regulon, with 199 genes being either directly or indirectly regulated by both of these global regulatory proteins. Among these 199 coregulated genes, 192 are divergently regulated, indicating that RedB functions as an antagonist of FnrL. Chromatin immunoprecipitation sequencing (ChIP-seq) analysis indicates that RedB and Fnr directly coregulate only 4 out of 199 genes. The primary mechanism for the divergent regulation of target genes thus involves indirect regulation by both RedB and FnrL (156 cases). Additional regulation involves direct binding by RedB and indirect regulation by FnrL (36 cases) or direct binding by FnrL and indirect regulation by RedB (3 cases). Analysis of physiological pathways under direct and indirect control by these global regulators demonstrates that RedB functions primarily to limit energy production, while FnrL functions to enhance energy production. This regulation includes glycolysis, gluconeogenesis, photosynthesis, hydrogen oxidation, electron transport, carbon fixation, lipid biosynthesis, and protein synthesis. Finally, we show that 75% of genomes from diverse species that code for RedB proteins also harbor genes coding for FNR homologs. This cooccurrence indicates that RedB likely has an important role in buffering FNR-mediated energy production in a broad range of species. IMPORTANCE The CRP/FNR family of regulatory proteins constitutes a large collection of related transcription factors, several of which globally regulate cellular energy production. A well-characterized example is FNR (called FnrL in Rhodobacter capsulatus), which is responsible for regulating the expression of numerous genes that promote maximal energy production and growth under anaerobic conditions. In a companion article (N. Ke, J. E. Kumka, M. Fang, B. Weaver, et al., Microbiol Spectr 10:e02353-22, 2022, https://doi.org/10.1128/Spectrum02353-22), we identified a new subgroup of the CRP/FNR family and demonstrated that a member of this new subgroup, called RedB, has a role in limiting cellular energy production. In this study, we show that numerous genes encompassing the RedB regulon significantly overlap genes that are members of the FnrL regulon. Furthermore, 97% of the genes that are members of both the RedB and FnrL regulons are divergently regulated by these two transcription factors. RedB thus functions as a buffer limiting the amount of energy production that is promoted by FnrL. FNR ortholog transcriptomics redox regulation global transcription factor binding photosynthetic bacterium Microbiology Joseph E. Kumka verfasserin aut Mingxu Fang verfasserin aut Brian Weaver verfasserin aut Judith N. Burstyn verfasserin aut Carl E. Bauer verfasserin aut In Microbiology Spectrum American Society for Microbiology, 2022 10(2022), 5 (DE-627)816693293 (DE-600)2807133-5 21650497 nnns volume:10 year:2022 number:5 https://doi.org/10.1128/spectrum.02354-22 kostenfrei https://doaj.org/article/5f8bcb0993e84985bad63a36237b373c kostenfrei https://journals.asm.org/doi/10.1128/spectrum.02354-22 kostenfrei https://doaj.org/toc/2165-0497 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_252 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 10 2022 5
allfields_unstemmed	10.1128/spectrum.02354-22 doi (DE-627)DOAJ083937277 (DE-599)DOAJ5f8bcb0993e84985bad63a36237b373c DE-627 ger DE-627 rakwb eng QR1-502 Nijia Ke verfasserin aut Redox Brake Regulator RedB and FnrL Function as Yin-Yang Regulators of Anaerobic-Aerobic Metabolism in Rhodobacter capsulatus 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier ABSTRACT We recently described a new member of the CRP (cyclic AMP receptor protein)/FNR (fumarate and nitrate reductase regulatory protein) family called RedB, an acronym for redox brake, that functions to limit the production of ATP and NADH. This study shows that the RedB regulon significantly overlaps the FnrL regulon, with 199 genes being either directly or indirectly regulated by both of these global regulatory proteins. Among these 199 coregulated genes, 192 are divergently regulated, indicating that RedB functions as an antagonist of FnrL. Chromatin immunoprecipitation sequencing (ChIP-seq) analysis indicates that RedB and Fnr directly coregulate only 4 out of 199 genes. The primary mechanism for the divergent regulation of target genes thus involves indirect regulation by both RedB and FnrL (156 cases). Additional regulation involves direct binding by RedB and indirect regulation by FnrL (36 cases) or direct binding by FnrL and indirect regulation by RedB (3 cases). Analysis of physiological pathways under direct and indirect control by these global regulators demonstrates that RedB functions primarily to limit energy production, while FnrL functions to enhance energy production. This regulation includes glycolysis, gluconeogenesis, photosynthesis, hydrogen oxidation, electron transport, carbon fixation, lipid biosynthesis, and protein synthesis. Finally, we show that 75% of genomes from diverse species that code for RedB proteins also harbor genes coding for FNR homologs. This cooccurrence indicates that RedB likely has an important role in buffering FNR-mediated energy production in a broad range of species. IMPORTANCE The CRP/FNR family of regulatory proteins constitutes a large collection of related transcription factors, several of which globally regulate cellular energy production. A well-characterized example is FNR (called FnrL in Rhodobacter capsulatus), which is responsible for regulating the expression of numerous genes that promote maximal energy production and growth under anaerobic conditions. In a companion article (N. Ke, J. E. Kumka, M. Fang, B. Weaver, et al., Microbiol Spectr 10:e02353-22, 2022, https://doi.org/10.1128/Spectrum02353-22), we identified a new subgroup of the CRP/FNR family and demonstrated that a member of this new subgroup, called RedB, has a role in limiting cellular energy production. In this study, we show that numerous genes encompassing the RedB regulon significantly overlap genes that are members of the FnrL regulon. Furthermore, 97% of the genes that are members of both the RedB and FnrL regulons are divergently regulated by these two transcription factors. RedB thus functions as a buffer limiting the amount of energy production that is promoted by FnrL. FNR ortholog transcriptomics redox regulation global transcription factor binding photosynthetic bacterium Microbiology Joseph E. Kumka verfasserin aut Mingxu Fang verfasserin aut Brian Weaver verfasserin aut Judith N. Burstyn verfasserin aut Carl E. Bauer verfasserin aut In Microbiology Spectrum American Society for Microbiology, 2022 10(2022), 5 (DE-627)816693293 (DE-600)2807133-5 21650497 nnns volume:10 year:2022 number:5 https://doi.org/10.1128/spectrum.02354-22 kostenfrei https://doaj.org/article/5f8bcb0993e84985bad63a36237b373c kostenfrei https://journals.asm.org/doi/10.1128/spectrum.02354-22 kostenfrei https://doaj.org/toc/2165-0497 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_252 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 10 2022 5
allfieldsGer	10.1128/spectrum.02354-22 doi (DE-627)DOAJ083937277 (DE-599)DOAJ5f8bcb0993e84985bad63a36237b373c DE-627 ger DE-627 rakwb eng QR1-502 Nijia Ke verfasserin aut Redox Brake Regulator RedB and FnrL Function as Yin-Yang Regulators of Anaerobic-Aerobic Metabolism in Rhodobacter capsulatus 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier ABSTRACT We recently described a new member of the CRP (cyclic AMP receptor protein)/FNR (fumarate and nitrate reductase regulatory protein) family called RedB, an acronym for redox brake, that functions to limit the production of ATP and NADH. This study shows that the RedB regulon significantly overlaps the FnrL regulon, with 199 genes being either directly or indirectly regulated by both of these global regulatory proteins. Among these 199 coregulated genes, 192 are divergently regulated, indicating that RedB functions as an antagonist of FnrL. Chromatin immunoprecipitation sequencing (ChIP-seq) analysis indicates that RedB and Fnr directly coregulate only 4 out of 199 genes. The primary mechanism for the divergent regulation of target genes thus involves indirect regulation by both RedB and FnrL (156 cases). Additional regulation involves direct binding by RedB and indirect regulation by FnrL (36 cases) or direct binding by FnrL and indirect regulation by RedB (3 cases). Analysis of physiological pathways under direct and indirect control by these global regulators demonstrates that RedB functions primarily to limit energy production, while FnrL functions to enhance energy production. This regulation includes glycolysis, gluconeogenesis, photosynthesis, hydrogen oxidation, electron transport, carbon fixation, lipid biosynthesis, and protein synthesis. Finally, we show that 75% of genomes from diverse species that code for RedB proteins also harbor genes coding for FNR homologs. This cooccurrence indicates that RedB likely has an important role in buffering FNR-mediated energy production in a broad range of species. IMPORTANCE The CRP/FNR family of regulatory proteins constitutes a large collection of related transcription factors, several of which globally regulate cellular energy production. A well-characterized example is FNR (called FnrL in Rhodobacter capsulatus), which is responsible for regulating the expression of numerous genes that promote maximal energy production and growth under anaerobic conditions. In a companion article (N. Ke, J. E. Kumka, M. Fang, B. Weaver, et al., Microbiol Spectr 10:e02353-22, 2022, https://doi.org/10.1128/Spectrum02353-22), we identified a new subgroup of the CRP/FNR family and demonstrated that a member of this new subgroup, called RedB, has a role in limiting cellular energy production. In this study, we show that numerous genes encompassing the RedB regulon significantly overlap genes that are members of the FnrL regulon. Furthermore, 97% of the genes that are members of both the RedB and FnrL regulons are divergently regulated by these two transcription factors. RedB thus functions as a buffer limiting the amount of energy production that is promoted by FnrL. FNR ortholog transcriptomics redox regulation global transcription factor binding photosynthetic bacterium Microbiology Joseph E. Kumka verfasserin aut Mingxu Fang verfasserin aut Brian Weaver verfasserin aut Judith N. Burstyn verfasserin aut Carl E. Bauer verfasserin aut In Microbiology Spectrum American Society for Microbiology, 2022 10(2022), 5 (DE-627)816693293 (DE-600)2807133-5 21650497 nnns volume:10 year:2022 number:5 https://doi.org/10.1128/spectrum.02354-22 kostenfrei https://doaj.org/article/5f8bcb0993e84985bad63a36237b373c kostenfrei https://journals.asm.org/doi/10.1128/spectrum.02354-22 kostenfrei https://doaj.org/toc/2165-0497 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_252 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 10 2022 5
allfieldsSound	10.1128/spectrum.02354-22 doi (DE-627)DOAJ083937277 (DE-599)DOAJ5f8bcb0993e84985bad63a36237b373c DE-627 ger DE-627 rakwb eng QR1-502 Nijia Ke verfasserin aut Redox Brake Regulator RedB and FnrL Function as Yin-Yang Regulators of Anaerobic-Aerobic Metabolism in Rhodobacter capsulatus 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier ABSTRACT We recently described a new member of the CRP (cyclic AMP receptor protein)/FNR (fumarate and nitrate reductase regulatory protein) family called RedB, an acronym for redox brake, that functions to limit the production of ATP and NADH. This study shows that the RedB regulon significantly overlaps the FnrL regulon, with 199 genes being either directly or indirectly regulated by both of these global regulatory proteins. Among these 199 coregulated genes, 192 are divergently regulated, indicating that RedB functions as an antagonist of FnrL. Chromatin immunoprecipitation sequencing (ChIP-seq) analysis indicates that RedB and Fnr directly coregulate only 4 out of 199 genes. The primary mechanism for the divergent regulation of target genes thus involves indirect regulation by both RedB and FnrL (156 cases). Additional regulation involves direct binding by RedB and indirect regulation by FnrL (36 cases) or direct binding by FnrL and indirect regulation by RedB (3 cases). Analysis of physiological pathways under direct and indirect control by these global regulators demonstrates that RedB functions primarily to limit energy production, while FnrL functions to enhance energy production. This regulation includes glycolysis, gluconeogenesis, photosynthesis, hydrogen oxidation, electron transport, carbon fixation, lipid biosynthesis, and protein synthesis. Finally, we show that 75% of genomes from diverse species that code for RedB proteins also harbor genes coding for FNR homologs. This cooccurrence indicates that RedB likely has an important role in buffering FNR-mediated energy production in a broad range of species. IMPORTANCE The CRP/FNR family of regulatory proteins constitutes a large collection of related transcription factors, several of which globally regulate cellular energy production. A well-characterized example is FNR (called FnrL in Rhodobacter capsulatus), which is responsible for regulating the expression of numerous genes that promote maximal energy production and growth under anaerobic conditions. In a companion article (N. Ke, J. E. Kumka, M. Fang, B. Weaver, et al., Microbiol Spectr 10:e02353-22, 2022, https://doi.org/10.1128/Spectrum02353-22), we identified a new subgroup of the CRP/FNR family and demonstrated that a member of this new subgroup, called RedB, has a role in limiting cellular energy production. In this study, we show that numerous genes encompassing the RedB regulon significantly overlap genes that are members of the FnrL regulon. Furthermore, 97% of the genes that are members of both the RedB and FnrL regulons are divergently regulated by these two transcription factors. RedB thus functions as a buffer limiting the amount of energy production that is promoted by FnrL. FNR ortholog transcriptomics redox regulation global transcription factor binding photosynthetic bacterium Microbiology Joseph E. Kumka verfasserin aut Mingxu Fang verfasserin aut Brian Weaver verfasserin aut Judith N. Burstyn verfasserin aut Carl E. Bauer verfasserin aut In Microbiology Spectrum American Society for Microbiology, 2022 10(2022), 5 (DE-627)816693293 (DE-600)2807133-5 21650497 nnns volume:10 year:2022 number:5 https://doi.org/10.1128/spectrum.02354-22 kostenfrei https://doaj.org/article/5f8bcb0993e84985bad63a36237b373c kostenfrei https://journals.asm.org/doi/10.1128/spectrum.02354-22 kostenfrei https://doaj.org/toc/2165-0497 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_252 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 10 2022 5
language	English
source	In Microbiology Spectrum 10(2022), 5 volume:10 year:2022 number:5
sourceStr	In Microbiology Spectrum 10(2022), 5 volume:10 year:2022 number:5
format_phy_str_mv	Article
institution	findex.gbv.de
topic_facet	FNR ortholog transcriptomics redox regulation global transcription factor binding photosynthetic bacterium Microbiology
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container_title	Microbiology Spectrum
authorswithroles_txt_mv	Nijia Ke @@aut@@ Joseph E. Kumka @@aut@@ Mingxu Fang @@aut@@ Brian Weaver @@aut@@ Judith N. Burstyn @@aut@@ Carl E. Bauer @@aut@@
publishDateDaySort_date	2022-01-01T00:00:00Z
hierarchy_top_id	816693293
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This study shows that the RedB regulon significantly overlaps the FnrL regulon, with 199 genes being either directly or indirectly regulated by both of these global regulatory proteins. Among these 199 coregulated genes, 192 are divergently regulated, indicating that RedB functions as an antagonist of FnrL. Chromatin immunoprecipitation sequencing (ChIP-seq) analysis indicates that RedB and Fnr directly coregulate only 4 out of 199 genes. The primary mechanism for the divergent regulation of target genes thus involves indirect regulation by both RedB and FnrL (156 cases). Additional regulation involves direct binding by RedB and indirect regulation by FnrL (36 cases) or direct binding by FnrL and indirect regulation by RedB (3 cases). Analysis of physiological pathways under direct and indirect control by these global regulators demonstrates that RedB functions primarily to limit energy production, while FnrL functions to enhance energy production. This regulation includes glycolysis, gluconeogenesis, photosynthesis, hydrogen oxidation, electron transport, carbon fixation, lipid biosynthesis, and protein synthesis. Finally, we show that 75% of genomes from diverse species that code for RedB proteins also harbor genes coding for FNR homologs. This cooccurrence indicates that RedB likely has an important role in buffering FNR-mediated energy production in a broad range of species. IMPORTANCE The CRP/FNR family of regulatory proteins constitutes a large collection of related transcription factors, several of which globally regulate cellular energy production. A well-characterized example is FNR (called FnrL in Rhodobacter capsulatus), which is responsible for regulating the expression of numerous genes that promote maximal energy production and growth under anaerobic conditions. In a companion article (N. Ke, J. E. Kumka, M. Fang, B. 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callnumber-first	Q - Science
author	Nijia Ke
spellingShingle	Nijia Ke misc QR1-502 misc FNR ortholog misc transcriptomics misc redox regulation misc global transcription factor binding misc photosynthetic bacterium misc Microbiology Redox Brake Regulator RedB and FnrL Function as Yin-Yang Regulators of Anaerobic-Aerobic Metabolism in Rhodobacter capsulatus
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topic_title	QR1-502 Redox Brake Regulator RedB and FnrL Function as Yin-Yang Regulators of Anaerobic-Aerobic Metabolism in Rhodobacter capsulatus FNR ortholog transcriptomics redox regulation global transcription factor binding photosynthetic bacterium
topic	misc QR1-502 misc FNR ortholog misc transcriptomics misc redox regulation misc global transcription factor binding misc photosynthetic bacterium misc Microbiology
topic_unstemmed	misc QR1-502 misc FNR ortholog misc transcriptomics misc redox regulation misc global transcription factor binding misc photosynthetic bacterium misc Microbiology
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title	Redox Brake Regulator RedB and FnrL Function as Yin-Yang Regulators of Anaerobic-Aerobic Metabolism in Rhodobacter capsulatus
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title_full	Redox Brake Regulator RedB and FnrL Function as Yin-Yang Regulators of Anaerobic-Aerobic Metabolism in Rhodobacter capsulatus
author_sort	Nijia Ke
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author_browse	Nijia Ke Joseph E. Kumka Mingxu Fang Brian Weaver Judith N. Burstyn Carl E. Bauer
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title_sort	redox brake regulator redb and fnrl function as yin-yang regulators of anaerobic-aerobic metabolism in rhodobacter capsulatus
callnumber	QR1-502
title_auth	Redox Brake Regulator RedB and FnrL Function as Yin-Yang Regulators of Anaerobic-Aerobic Metabolism in Rhodobacter capsulatus
abstract	ABSTRACT We recently described a new member of the CRP (cyclic AMP receptor protein)/FNR (fumarate and nitrate reductase regulatory protein) family called RedB, an acronym for redox brake, that functions to limit the production of ATP and NADH. This study shows that the RedB regulon significantly overlaps the FnrL regulon, with 199 genes being either directly or indirectly regulated by both of these global regulatory proteins. Among these 199 coregulated genes, 192 are divergently regulated, indicating that RedB functions as an antagonist of FnrL. Chromatin immunoprecipitation sequencing (ChIP-seq) analysis indicates that RedB and Fnr directly coregulate only 4 out of 199 genes. The primary mechanism for the divergent regulation of target genes thus involves indirect regulation by both RedB and FnrL (156 cases). Additional regulation involves direct binding by RedB and indirect regulation by FnrL (36 cases) or direct binding by FnrL and indirect regulation by RedB (3 cases). Analysis of physiological pathways under direct and indirect control by these global regulators demonstrates that RedB functions primarily to limit energy production, while FnrL functions to enhance energy production. This regulation includes glycolysis, gluconeogenesis, photosynthesis, hydrogen oxidation, electron transport, carbon fixation, lipid biosynthesis, and protein synthesis. Finally, we show that 75% of genomes from diverse species that code for RedB proteins also harbor genes coding for FNR homologs. This cooccurrence indicates that RedB likely has an important role in buffering FNR-mediated energy production in a broad range of species. IMPORTANCE The CRP/FNR family of regulatory proteins constitutes a large collection of related transcription factors, several of which globally regulate cellular energy production. A well-characterized example is FNR (called FnrL in Rhodobacter capsulatus), which is responsible for regulating the expression of numerous genes that promote maximal energy production and growth under anaerobic conditions. In a companion article (N. Ke, J. E. Kumka, M. Fang, B. Weaver, et al., Microbiol Spectr 10:e02353-22, 2022, https://doi.org/10.1128/Spectrum02353-22), we identified a new subgroup of the CRP/FNR family and demonstrated that a member of this new subgroup, called RedB, has a role in limiting cellular energy production. In this study, we show that numerous genes encompassing the RedB regulon significantly overlap genes that are members of the FnrL regulon. Furthermore, 97% of the genes that are members of both the RedB and FnrL regulons are divergently regulated by these two transcription factors. RedB thus functions as a buffer limiting the amount of energy production that is promoted by FnrL.
abstractGer	ABSTRACT We recently described a new member of the CRP (cyclic AMP receptor protein)/FNR (fumarate and nitrate reductase regulatory protein) family called RedB, an acronym for redox brake, that functions to limit the production of ATP and NADH. This study shows that the RedB regulon significantly overlaps the FnrL regulon, with 199 genes being either directly or indirectly regulated by both of these global regulatory proteins. Among these 199 coregulated genes, 192 are divergently regulated, indicating that RedB functions as an antagonist of FnrL. Chromatin immunoprecipitation sequencing (ChIP-seq) analysis indicates that RedB and Fnr directly coregulate only 4 out of 199 genes. The primary mechanism for the divergent regulation of target genes thus involves indirect regulation by both RedB and FnrL (156 cases). Additional regulation involves direct binding by RedB and indirect regulation by FnrL (36 cases) or direct binding by FnrL and indirect regulation by RedB (3 cases). Analysis of physiological pathways under direct and indirect control by these global regulators demonstrates that RedB functions primarily to limit energy production, while FnrL functions to enhance energy production. This regulation includes glycolysis, gluconeogenesis, photosynthesis, hydrogen oxidation, electron transport, carbon fixation, lipid biosynthesis, and protein synthesis. Finally, we show that 75% of genomes from diverse species that code for RedB proteins also harbor genes coding for FNR homologs. This cooccurrence indicates that RedB likely has an important role in buffering FNR-mediated energy production in a broad range of species. IMPORTANCE The CRP/FNR family of regulatory proteins constitutes a large collection of related transcription factors, several of which globally regulate cellular energy production. A well-characterized example is FNR (called FnrL in Rhodobacter capsulatus), which is responsible for regulating the expression of numerous genes that promote maximal energy production and growth under anaerobic conditions. In a companion article (N. Ke, J. E. Kumka, M. Fang, B. Weaver, et al., Microbiol Spectr 10:e02353-22, 2022, https://doi.org/10.1128/Spectrum02353-22), we identified a new subgroup of the CRP/FNR family and demonstrated that a member of this new subgroup, called RedB, has a role in limiting cellular energy production. In this study, we show that numerous genes encompassing the RedB regulon significantly overlap genes that are members of the FnrL regulon. Furthermore, 97% of the genes that are members of both the RedB and FnrL regulons are divergently regulated by these two transcription factors. RedB thus functions as a buffer limiting the amount of energy production that is promoted by FnrL.
abstract_unstemmed	ABSTRACT We recently described a new member of the CRP (cyclic AMP receptor protein)/FNR (fumarate and nitrate reductase regulatory protein) family called RedB, an acronym for redox brake, that functions to limit the production of ATP and NADH. This study shows that the RedB regulon significantly overlaps the FnrL regulon, with 199 genes being either directly or indirectly regulated by both of these global regulatory proteins. Among these 199 coregulated genes, 192 are divergently regulated, indicating that RedB functions as an antagonist of FnrL. Chromatin immunoprecipitation sequencing (ChIP-seq) analysis indicates that RedB and Fnr directly coregulate only 4 out of 199 genes. The primary mechanism for the divergent regulation of target genes thus involves indirect regulation by both RedB and FnrL (156 cases). Additional regulation involves direct binding by RedB and indirect regulation by FnrL (36 cases) or direct binding by FnrL and indirect regulation by RedB (3 cases). Analysis of physiological pathways under direct and indirect control by these global regulators demonstrates that RedB functions primarily to limit energy production, while FnrL functions to enhance energy production. This regulation includes glycolysis, gluconeogenesis, photosynthesis, hydrogen oxidation, electron transport, carbon fixation, lipid biosynthesis, and protein synthesis. Finally, we show that 75% of genomes from diverse species that code for RedB proteins also harbor genes coding for FNR homologs. This cooccurrence indicates that RedB likely has an important role in buffering FNR-mediated energy production in a broad range of species. IMPORTANCE The CRP/FNR family of regulatory proteins constitutes a large collection of related transcription factors, several of which globally regulate cellular energy production. A well-characterized example is FNR (called FnrL in Rhodobacter capsulatus), which is responsible for regulating the expression of numerous genes that promote maximal energy production and growth under anaerobic conditions. In a companion article (N. Ke, J. E. Kumka, M. Fang, B. Weaver, et al., Microbiol Spectr 10:e02353-22, 2022, https://doi.org/10.1128/Spectrum02353-22), we identified a new subgroup of the CRP/FNR family and demonstrated that a member of this new subgroup, called RedB, has a role in limiting cellular energy production. In this study, we show that numerous genes encompassing the RedB regulon significantly overlap genes that are members of the FnrL regulon. Furthermore, 97% of the genes that are members of both the RedB and FnrL regulons are divergently regulated by these two transcription factors. RedB thus functions as a buffer limiting the amount of energy production that is promoted by FnrL.
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title_short	Redox Brake Regulator RedB and FnrL Function as Yin-Yang Regulators of Anaerobic-Aerobic Metabolism in Rhodobacter capsulatus
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Redox Brake Regulator RedB and FnrL Function as Yin-Yang Regulators of Anaerobic-Aerobic Metabolism in Rhodobacter capsulatus

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