Project description:Bioreactor was set up to enrich microorganisms capable of mediating anaerobic ethane and butane oxidation coupled to ntirate reduction. Metaproteomics was conducted to identify the expressed proteins in active microbes.
2024-05-24 | PXD039267 | Pride
Project description:Enrichment of anaerobic ethane and butane oxidation microorganisms
| PRJNA989758 | ENA
Project description:Anaerobic ethane oxidation by archaea in the Guaymas Basin
| PRJEB36446 | ENA
Project description:Anaerobic oxidation of ethane by archaea in different marine environments
Project description:This SuperSeries is composed of the following subset Series: GSE28549: Anaerobic Oxidation of Benzene by the Hyperthermophilic Archaeon Ferroglobus placidus (Phenol vs. Benzoate) GSE30798: Anaerobic Oxidation of Benzene by the Hyperthermophilic Archaeon Ferroglobus placidus (Benzene vs. Acetate) GSE30799: Anaerobic Oxidation of Benzene by the Hyperthermophilic Archaeon Ferroglobus placidus (Benzene vs. Phenol) GSE30801: Anaerobic Oxidation of Benzene by the Hyperthermophilic Archaeon Ferroglobus placidus (Benzene vs. Benzoate) Refer to individual Series
Project description:Anaerobic activation of benzene is expected to represent a novel biochemistry of environmental significance but research into the mechanisms has been stymied by a lack of a genetically tractable pure culture which unequivocally does not use molecular oxygen to activate benzene. Geobacter metallireducens grew in a medium in which benzene was the sole electron donor and Fe(III) was the sole electron acceptor with a stoichiometry of benzene loss and Fe(III) reduction consistent with benzene oxidation to carbon dioxide coupled with Fe(III) reduction. Phenol labeled with 18O was produced when the medium was labeled with H218O, as expected for a true anaerobic conversion of benzene to phenol. Gene expression patterns indicated that benzene was metabolized through a phenol intermediate rather than benzoate or toluene. Deletion of ppcB, which encodes a subunit of the phenylphosphate carboxylase, an enzyme required for phenol metabolism, inhibited metabolism of benzene. Deleting genes specific for benzoate or toluene metabolism did not. Comparison of gene expression patterns in cells grown on benzene versus cells grown on phenol revealed genes specifically expressed in benzene-grown cells. Deletion of one of these, Gmet_3376, inhibited anaerobic benzene oxidation, but not the metabolism of phenol, benzoate, or toluene. The availability of a genetically tractable pure culture that can anaerobically convert benzene to phenol with oxygen derived from water should significantly accelerate elucidation of the mechanisms by which benzene can be activated in the absence of molecular oxygen. Total RNA from three separate cultures of G. metallireducens grown with 250 µM benzene three separate cultures of G. metallireducens grown with 500 µM phenol three separate cultures of G. metallireducens grown with 1 mM benzoate three separate cultures of G. metallireducens grown with 500 µM toluene three separate cultures of G. metallireducens grown with 10 mM acetate were used to study [1] Anaerobic oxidation of benzene by G. metallireducens (Benzene vs. acetate, Benzene vs. benzoate, Benzene vs. phenol, Benzene vs. toluene) [2] Anaerobic oxidation of benzoate by G. metallireducens (Benzoate vs. acetate) [3] Anaerobic oxidation of phenol by G. metallireducens (Phenol vs. acetate) [4] Anaerobic oxidation of toluene by G. metallireducens (Toluene vs. acetate) Each chip measures the expression level of 3,627 genes from G. metallireducens DSM 7210 with nine 45-60-mer probe pairs (PM/MM) per gene, with three-fold technical redundancy.
Project description:Identification of the peptides composing the enriched multisubunit enzymes natively purified from the microbial enrichment, based on gel bands obtained by native electrophoresis. The anaerobic oxidation of alkanes is a microbial process occurring in deep-sea hydrocarbon seeps that plays a key ecological role in these exotic niches. The metabolic capacity of anaerobic ethane oxidation, involving uncharted biochemistry, was reported in two archaeal species depending on sulfate-reducing partner bacteria. This study deciphers the molecular basis of the CO2-generating steps of ethanotrophy by characterising the native archaeal enzymes isolated from a thermophilic enrichment. While other microorganisms couple these steps to ferredoxin reduction, we found that the CO-dehydrogenase and the formylmethanofuran-dehydrogenase are bound to F420-reductase modules. The crystal structures of these multi-metalloenzyme complexes revealed electronic bridges coupling C1-oxidation to F420-reduction. Accordingly, both systems exhibit robust F420-reductase activities, which are not detected in methanogenic or methanotrophic relative organisms. We speculate that the whole catabolism of these archaea is reoriented towards F420-reduction, which facilitates the electron transfer to the sulfate-reducing partner, therefore representing the driving force of ethanotrophy.
2024-09-23 | PXD054507 | Pride
Project description:Ammonia oxidation performed by n-DAMO bacteria