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ABSTRACT: Novel syntrophic isovalerate-oxidizing bacteria and methanogens in methanogenic chemostats

PROVIDER: PRJNA542242 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR9040906.fastq.gz	Fastqsanger.gz
	SRR9040906_1.fastq.gz	Fastqsanger.gz
	SRR9040906_2.fastq.gz	Fastqsanger.gz
	SRR9040907_1.fastq.gz	Fastqsanger.gz
	SRR9040907_2.fastq.gz	Fastqsanger.gz

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Transcription profiling of Methanobacterium thermautotrophicus after contact with flagellar filament protein (FliC) and flagellar cap protein (FliD) of P. thermopropionicum

Project description:In the syntrophic interaction between fermentative bacteria (Pelotomaculum thermopropionicum) and methanogenic archaea (methanogens: Methanothemobacter thermautotrophicus), reducing equivalents (e.g., H2) produced by fermentative bacteria should efficiently be consumed by methanogens in order for the fermentation of volatile fatty acids (VFA, e.g., butyrate, propionate, and acetate) to be thermodynamically feasible. It has been known that physical approximation (e.g., coaggregation) between VFA-fermenting syntrophic bacteria (syntrophs) and hydrogenotrophic methanogens is necessary for efficient H2 transfer between them. Our previous study has shown that, at an early exponential growth phase of syntrophic coculture, cells of Pelotomaculum thermopropionicum (syntroph) were connected to cells of Methanothermobacter thermautotrophicus (methanogen) via unidentified extracellular filamentous appendages, after which they started to coaggregate, suggesting that the filamentous appendages may have been important for their syntrophic interaction. The filamentous appendages seemed to specifically connect these syntrophic partners, since such pairwise connection has been observed neither in single-species cultures (monocultures) nor in mixtures with other microbes.<br>We found that P. thermopropionicum has putative gene clusters for flagellum and pilus, while no extracellular filament gene was identified in the M. thermautotrophicus genome. So we examined transcriptome responses of M. thermautotrophicus to the contact with flagellar filament protein (FliC) and flagellar cap protein (FliD) of P. thermopropionicum.

2009-01-06 | E-MEXP-1971 | biostudies-arrayexpress

Transcription profiling of Methanothermobacter thermautotrophicus to identify transcriptome responses to contact with the flagellar filament protein (FliC) and flagellar cap protein (FliD) of P. thermopropionicum

Project description:In the syntrophic interaction between fermentative bacteria (Pelotomaculum thermopropionicum) and methanogenic archaea (methanogens: Methanothemobacter thermautotrophicus), reducing equivalents (e.g., H2) produced by fermentative bacteria should efficiently be consumed by methanogens in order for the fermentation of volatile fatty acids (VFA, e.g., butyrate, propionate, and acetate) to be thermodynamically feasible. It has been known that physical approximation (e.g., coaggregation) between VFA-fermenting syntrophic bacteria (syntrophs) and hydrogenotrophic methanogens is necessary for efficient H2 transfer between them. Our previous study has shown that, at an early exponential growth phase of syntrophic coculture, cells of Pelotomaculum thermopropionicum (syntroph) were connected to cells of Methanothermobacter thermautotrophicus (methanogen) via unidentified extracellular filamentous appendages, after which they started to coaggregate, suggesting that the filamentous appendages may have been important for their syntrophic interaction. The filamentous appendages seemed to specifically connect these syntrophic partners, since such pairwise connection has been observed neither in single-species cultures (monocultures) nor in mixtures with other microbes. <br> We found that P. thermopropionicum has putative gene clusters for flagellum and pilus, while no extracellular filament gene was identified in the M. thermautotrophicus genome. So we examined transcriptome responses of M. thermautotrophicus to the contact with flagellar filament protein (FliC) and flagellar cap protein (FliD) of P. thermopropionicum.

2008-01-31 | E-MEXP-1362 | biostudies-arrayexpress

Project description:Identification of novel syntrophic Butyrate-oxidizing bacteria

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Comparative transcriptional analysis of Desulfovibrio G20 grown under syntrophic and respiratory condtions

2012-11-29 | GSE42571 | GEO

Influence of growth rate and methanogenic partner on syntrophic metabolism of Desulfovibrio G20 (comparative transcriptional analysis of Desulfovibrio G20 grown under various syntrophic conditions relative to respiratory growth)

2013-05-02 | GSE46547 | GEO

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Project description:Pyruvate fermentation pathway and energetics of Desulfovibrio alaskensis strain G20 under syntrophic coculture and fermentative monoculture conditions Expression data for Desulfovibrio alaskensis strain G20 grown in chemostats on pyruvate under respiratory conditions (sulfate-limited and pyruvate-limited monoculture, dilution rate 0.047 and 0.027 h-1), fermentative conditions (monoculture, dilution rate 0.036 h-1), and syntrophic conditions (coculture with Methanococcus maripaludis or Methanospirillum hungatei, dilution rate of 0.047 and 0.027 h-1) 2 replicates each for syntrophic coculture (M. maripaludis or M. hungatei pairing) and respiratory (sulfate- or pyruvate-limited) monoculture for both growth rates (0.027 and 0.047 h-1), and 4 replicates fermentative monoculture (gas flow rate through head space of bioreactor 10 ml/min (chemostats C91 and C93) or 1 ml/min (chemostats C92 and C94)

2013-12-12 | E-GEOD-53226 | biostudies-arrayexpress

Comparative transcriptional analysis of Desulfovibrio alaskensis G20 grown under various syntrophic and fermentative conditions on pyruvate relative to respiratory growth

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Identification of syntrophic acetate-oxidizing bacteria in anaerobic digesters

Project description:Inhibition of the anaerobic digestion process through accumulation of volatile fatty acids (VFA) is a recurring problem which is the result of unbalanced growth between acidogenic bacteria and methanogens. A speedy recovery is essential for an establishment of a feasible economical biogas productions. Yet, little is known regarding the organisms participating in the recovery. In this study the organisms involved in the recovery were studied using protein-stable isotope probing (Protein-SIP) and mapping this data onto a binned metagenome. Under acetate-accumulated simulating conditions a formation of 13C-labeled CO2 and CH4 was detected immediately after the addition of [U-13C]acetate, indicative of a high turnover rate of acetate. Several labeled peptides were detected in protein-SIP analysis. These 13C-labeled peptides were mapped onto a binned metagenome for improved taxanomical classification of the organisms involved. The results revealed that Methanosarcina and Methanoculleus were actively involved in acetate turnover, as were five subspecies of Clostridia and one Bacteroidetes. The organisms affiliating with Clostridia and Bacteroidetes all contained the FTFHS gene for formyltetrahydrofolate synthetase, a key enzyme for reductive acetogenesis; indicating that these organisms are possible syntrophic acetate-oxidizing bacteria (SAOB) that can facilitate acetate consumption via syntrophic acetate oxidation coupled with hydrogenotrophic methanogenesis (SAO-HM). This study represents the first study applying protein-SIP for analysis of complex biogas samples, a promising method for identifying key microorganisms involved in specific pathways.

2016-05-11 | PXD002996 | Pride

Project description:Syntrophic methanogenesis by photosynthetic bacteria and methanogenic archaea

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Project description:Expression data for Desulfovibrio alaskensis strain G20 grown on lactate in sulfate-limited monoculture and syntrophic coculture with Methanococcus maripaludis or Methanospirillum hungatei in chemostats at a low growth rate of 0.027h-1. 7 samples of Desulfovibrio alaskensis strain G20 grown in syntrophic coculture on lactate with either Methanococcus maripaludis (4 replicates) or Methanospirillum hungatei (3 replicates), and 5 samples of sulfate-limited monoculture growth of strain G20 on lactate.

2013-05-02 | E-GEOD-46547 | biostudies-arrayexpress

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