Complete genome sequence of Defluviimonas alba cai42T, a microbial exopolysaccharides producer

Zhao, Jieyu; Geng, Shuang; Xu, Liang; Hu, Bing; Sun, Junsong; Nie, Yong; Tang, Yue‐Qin; Wu, Xiao‐Lei

doi:10.1016/j.jbiotec.2016.09.017

Cited by 10 publications

(4 citation statements)

References 16 publications

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“…Phreatobacter was found significantly correlated with the host’s immune response and increased under high dose of lead exposure. , Additionally, in as3mt –/– zebrafish, more differential bacteria significantly correlated with C tAs and iAs. Ensifer can effectively participate in As III methylation; , Aeromonas has an As-resistant system including ars operon and involves regulating the physiological activities of mucosal defense and immunity; , Defluviimonas can produce extracellular polysaccharides that feature in the regulation of sulfide adsorption and oxidation reaction Mycobacterium is closely associated with metabolism, immunity, and function-related genes of the body, and the susceptibility to mycobacterial infection tends to increase after As exposure. − Therefore, when the host lacks a key As detoxification enzyme, the As–resistant microbes turn to be more prosperous to play roles under exogenous iAs stress.…”

Section: Discussionmentioning

confidence: 99%

Effects of Intestinal Microbiota on the Biological Transformation of Arsenic in Zebrafish: Contribution and Mechanism

Zhong,

Zhang,

Huang

et al. 2024

Environ. Sci. Technol.

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Both the gut microbiome and their host participate in arsenic (As) biotransformation, while their exact roles and mechanisms in vivo remain unclear and unquantified. In this study, as3mt −/− zebrafish were treated with tetracycline (TET, 100 mg/ L) and arsenite (iAs III ) exposure for 30 days and treated with probiotic Lactobacillus rhamnosus GG (LGG, 1 × 10 8 cfu/g) and iAs III exposure for 15 days, respectively. Structural equation modeling analysis revealed that the contribution rates of the intestinal microbiome to the total arsenic (tAs) and inorganic As (iAs) metabolism approached 44.0 and 18.4%, respectively. Compared with wild-type, in as3mt −/− zebrafish, microbial richness and structure were more significantly correlated with tAs and iAs, and more differential microbes and microbial metabolic pathways significantly correlated with arsenic metabolites (P < 0.05). LGG supplement influenced the microbial communities, significantly up-regulated the expressions of genes related to As biotransformation (gss and gst) in the liver, down-regulated the expressions of oxidative stress genes (sod1, sod2, and cat) in the intestine, and increased arsenobetaine concentration (P < 0.05). Therefore, gut microbiome promotes As transformation and relieves As accumulation, playing more active roles under iAs stress when the host lacks key arsenic detoxification enzymes. LGG can promote As biotransformation and relieve oxidative stress under As exposure.

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Section: Discussionmentioning

confidence: 99%

Effects of Intestinal Microbiota on the Biological Transformation of Arsenic in Zebrafish: Contribution and Mechanism

Zhong,

Zhang,

Huang

et al. 2024

Environ. Sci. Technol.

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“…HME9836 (88%), and Petrimonas mucosa (94%), respectively. Defluviimonas alba is an aerobe capable of using oxygen as the terminal electron acceptor whereas most Defluviimonas species are facultative anaerobes that are also capable of nitrate respiration (Zhao et al 2016). Fluviicola spp.…”

Section: Phylogenetic Analysis Of the Dominant Otusmentioning

confidence: 99%

Transition of microbial community structures after development of membrane fouling in membrane bioreactors (MBRs)

et al. 2020

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Although membrane fouling is a major issue when operating membrane bioreactors (MBRs), information regarding MBR performance and the sludge microbiome after the development of fouling remains limited. For the present study, two MBRs were operated for approximately 1 month under conditions of membrane fouling to investigate the effects of highly stressed environments on the sludge microbiome. After the development of fouling, a Collimonasrelated operational taxonomic unit (OTU) was highly dominant in both reactors (relative abundances were ⁓ 63%) and this predomination caused a precipitous decline in the diversity indices of the sludge microbiomes. Because the excessive predomination by limited numbers of OTUs can lead to reductions in the adaptability to environmental changes, monitoring microbial diversity may be a valuable indicator for maintaining the robustness of a sludge microbiome. While, the decrease in the abundance of the Collimonas-related OTU resulted in the predomination of distinct microorganisms in each of the reactors despite being operated under the same conditions; this finding indicates existence of strong pressure to perturb the microbiomes. Detailed analyses suggested that the availability of terminal electron acceptors and competitive interactions between microbes via the secretion of extracellular proteins appeared to differentiate the structures of the respective microbial communities. During the extracellular proteins were secreted in the sludge, considerable portion of microbes were dead and large amounts of biomolecules seemed to be released; resultantly facilitated the predomination of fermentative anaerobes in one reactor as they use organic substances but not inorganic terminal electron acceptors to generate ATP under anaerobic conditions.

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“…Pseudogenes and prophage genes were not identified, whereas 14 CRISPR candidates were detected in the genome of strain CC3. A series of genes encoding polysaccharide biosynthesis/modification proteins, such as mannose-1-phosphate guanylyltransferase ( 12 ), glucose-1-phosphate thymidylyltransferase ( 13 ), dolichol-phosphate mannosyltransferase ( 14 ), dTDP-4-dehydrorhamnose reductase ( 15 ), and genes involved in polysaccharide ABC-type transporters were detected, which may function in the biosynthesis of polysaccharide bioflocculant and transportation across membranes and cell walls ( 16 , 17 ). In previous studies, the biomass wastes were directly used as carbon source of lignocellulose-degrading strains to produce various value-added products at a low cost ( 2 , 18 ).…”

Section: Genome Announcementmentioning

confidence: 99%

Complete Genome Sequence of a Novel Bioflocculant-Producing Strain, Microbacterium paludicola CC3

Liu

Sun

2017

Genome Announc

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Complete genome sequence of Defluviimonas alba cai42T, a microbial exopolysaccharides producer

Cited by 10 publications

References 16 publications

Effects of Intestinal Microbiota on the Biological Transformation of Arsenic in Zebrafish: Contribution and Mechanism

Effects of Intestinal Microbiota on the Biological Transformation of Arsenic in Zebrafish: Contribution and Mechanism

Transition of microbial community structures after development of membrane fouling in membrane bioreactors (MBRs)

Complete Genome Sequence of a Novel Bioflocculant-Producing Strain, Microbacterium paludicola CC3

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