<i>Hyphomicrobium</i>

Gliesche, Christian G.; Fesefeldt, Andreas; Hirsch, Peter

doi:10.1002/9781118960608.gbm00820

Cited by 6 publications

(3 citation statements)

References 186 publications

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“…1). Denitrifying Azospira (6.51%), Haliangium (2.14%), Hyphomicrobium (0.90%), and Dechloromonas (0.23%) increased significantly, as they were able to grow on simple organic acids (Osaka et al 2006, Gliesche et al 2015, Nam et al 2016). The PAO Candidatus Accumulibacter (6.26%) were 2.3-9.5 times more abundant than those in phase I.…”

Section: Vfas Supplementation Altered Community Structure and Comammo...mentioning

confidence: 99%

Survival strategy of comammox bacteria in a wastewater nutrient removal system with sludge fermentation liquid as additional carbon source

Chai

Xiao

et al. 2022

Science of The Total Environment

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Section: Vfas Supplementation Altered Community Structure and Comammo...mentioning

confidence: 99%

Survival strategy of comammox bacteria in a wastewater nutrient removal system with sludge fermentation liquid as additional carbon source

Chai

Xiao

et al. 2022

Science of The Total Environment

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“…Preliminary experiments confirmed that DCM-degrading strain MC8b was also capable of growing with methanol, the reference growth substrate for strains of the Hyphomicrobium genus [32] to which strain MC8b had been tentatively affiliated [14]. We hypothesised that synthesis of the required dehalogenase to sustain strain MC8b growth on DCM may be regulated by the presence of its growth substrate, as observed in many dehalogenating strains [33].…”

Section: Resultsmentioning

confidence: 60%

Dichloromethane Degradation Pathway from Unsequenced Hyphomicrobium sp. MC8b Rapidly Explored by Pan-Proteomics

et al. 2020

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Several bacteria are able to degrade the major industrial solvent dichloromethane (DCM) by using the conserved dehalogenase DcmA, the only system for DCM degradation characterised at the sequence level so far. Using differential proteomics, we rapidly identified key determinants of DCM degradation for Hyphomicrobium sp. MC8b, an unsequenced facultative methylotrophic DCM-degrading strain. For this, we designed a pan-proteomics database comprising the annotated genome sequences of 13 distinct Hyphomicrobium strains. Compared to growth with methanol, growth with DCM induces drastic changes in the proteome of strain MC8b. Dichloromethane dehalogenase DcmA was detected by differential pan-proteomics, but only with poor sequence coverage, suggesting atypical characteristics of the DCM dehalogenation system in this strain. More peptides were assigned to DcmA by error-tolerant search, warranting subsequent sequencing of the genome of strain MC8b, which revealed a highly divergent set of dcm genes in this strain. This suggests that the dcm enzymatic system is less strongly conserved than previously believed, and that substantial molecular evolution of dcm genes has occurred beyond their horizontal transfer in the bacterial domain. Our study showed the power of pan-proteomics for quick characterization of new strains belonging to branches of the Tree of Life that are densely genome-sequenced.

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“…In this environment, bacteria adhered to the wall surface in low energy zones (i.e., opaque bands), less susceptible to leach, where they found more stable conditions to catalyze Mn 2+ oxidation (Nealson, 2006). This hypothesis is further supported by the identification of putative predivisional cells, which are usually associated with the attachment of cells to the substrate (Gliesche et al, 2015;Hirsch and Gebers, 2015). Accordingly, the spatial distribution of the different morphotypes points to a strong influence exerted by the geometry of the substrate surface (i.e., morphology of the cave walls) on the hydraulic regime, which, in turn, controls the detrital supply and microbial colonization that trigger the formation of highly disordered vernadite, instead of todorokite and/or ranciéite.…”

Section: Significance Of Patinas Morphotypesmentioning

confidence: 83%

Morpho-Mineralogical and Bio-Geochemical Description of Cave Manganese Stromatolite-Like Patinas (Grotta del Cervo, Central Italy) and Hints on Their Paleohydrological-Driven Genesis

et al. 2021

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Caves are dark subsurface environments with relatively constant temperatures that allow studying bio-mineralization processes and paleoenvironmental or climate changes in optimal conditions. In the extreme and oligotrophic cave environment, manganese patinas having stromatolite-like features are uncommon. Here we provide the first detailed mineralogical, geochemical, and microbiological investigation of fine-grained and poorly crystalline MnFe stromatolite-like wall patinas formed in a deep-cave environment in Italy. These mineralizations, about 3 mm thick, consist of an alternation of Mn-layers and Fe-lenses. We show that the microbial communities' composition is dominated by Mn-oxidizing bacteria, such as Bacillus, Flavobacterium, and Pseudomonas. Our multidisciplinary investigation, integrating data from different analytical techniques (i.e., optical microscopy, SEM-EDS, μXRF, XRPD, FT-IR, Raman spectroscopy, and DNA sequencing), revealed peculiar chemical, mineralogical, and biological features: 1) A cyclical oscillation of Mn and Fe along the growth of the patinas. We propose that this oscillation represents the shift between oxic and suboxic conditions related to different phases occurring during paleo-flood events; 2) A typical spatial distribution of mineralogy and oxidation state of Mn, bacterial imprints, detrital content, and stromatolite-like morphologies along the Mn-layers. We propose that this distribution is controlled by the local hydraulic regime of the paleo-floods, which, in turn, is directly related to the morphology of the wall surface. Under less turbulent conditions, the combination of clay mineral catalysis and biological oxidation produced vernadite, a poor-crystalline phyllomanganate with a low average oxidation state of Mn, and branched columnar stromatolite-like morphologies. On the other hand, under more turbulent conditions, the sedimentation of clay minerals and microbial communities' development are both inhibited. In this local environment, a lower oxidation rate of Mn2+ favored the formation of todorokite and/or ranciéite, two compounds with a high average oxidation state of Mn, and flat-laminated or columnar stromatolite-like morphologies.

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Hyphomicrobium

Cited by 6 publications

References 186 publications

Survival strategy of comammox bacteria in a wastewater nutrient removal system with sludge fermentation liquid as additional carbon source

Survival strategy of comammox bacteria in a wastewater nutrient removal system with sludge fermentation liquid as additional carbon source

Dichloromethane Degradation Pathway from Unsequenced Hyphomicrobium sp. MC8b Rapidly Explored by Pan-Proteomics

Morpho-Mineralogical and Bio-Geochemical Description of Cave Manganese Stromatolite-Like Patinas (Grotta del Cervo, Central Italy) and Hints on Their Paleohydrological-Driven Genesis

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