Iodate reduction by marine aerobic bacteria.

Iodate reductase (Idr) gene cluster ( ) is involved in bacterial iodate (IO ) respiration under anaerobic conditions. Putative gene clusters are present in both anaerobic and aerobic bacteria; however, the specific physiological roles of genes in aerobic bacteria remain unclear. Therefore, in this study, three marine aerobic bacteria with putative gene clusters (, , and ) were grown in the presence of iodate to determine whether they can reduce iodate to iodide (I).

Draft genome sequence of sp. DVR, an actinobacterium of the family isolated from soil in Japan.

sp. strain DVR is an actinobacterium of the family isolated from soil in Japan. Here we report the draft genome sequence of strain DVR.

Identification of bacterial dissimilatory antimonate reductase AnrA: genes and proteins involved in antimonate respiration and resistance in sp. strain SVR.

sp. strain SVR uses antimonate [Sb(V)] as a terminal electron acceptor for anaerobic respiration. Here, we visualized a possible key enzyme, periplasmic Sb(V) reductase (Anr), via active staining and non-denaturing gel electrophoresis.

Corrigendum: Iron corrosion concomitant with nitrate reduction by sp. nov. isolated from iodide-rich brine associated with natural gas.

[This corrects the article DOI: 10.3389/fmicb.2023.

Iron corrosion concomitant with nitrate reduction by sp. nov. isolated from iodide-rich brine associated with natural gas.

Microbially influenced corrosion (MIC) may contribute significantly to corrosion-related failures in injection wells and iron pipes of iodine production facilities. In this study, the iron (Fe) corroding activity of strain Q-1 isolated from iodide-rich brine in Japan and two strains phylogenetically related to strain Q-1 were investigated under various culture conditions. Under aerobic conditions, the Fe foil in the culture of strain Q-1 was oxidized in the presence of nitrate and yeast extract, while those of two strains were not.

Draft genome sequence of sp. IPA-1, a bacterium isolated from arsenic-contaminated soil in Japan.

sp. strain IPA-1 is a bacterium isolated from arsenic-contaminated soil in Japan. We here report the draft genome sequence of strain IPA-1.

Iodate respiration by sp. DN11 and its potential use for removal of radioiodine from contaminated aquifers.

sp. DN11 was previously isolated from gasoline-contaminated groundwater as an anaerobic benzene-degrading bacterium. Genome analysis of strain DN11 revealed that it contained a putative gene cluster ( ), which was recently found to be involved in bacterial iodate (IO ) respiration.

The Genus : From Its Discovery to Potential Applications.

The genus was recently proposed in the class Alphaproteobacteria. strains are aerobic, mesophilic, neutrophilic, moderately halophilic, and chemo-organotrophic. They were first discovered in natural gas brine water containing a very high level of iodide (I).

Decolorization of cationic dyes under alkaline conditions by Iodidimonas sp. Q-1 multicopper oxidase.

Previously, we found that a multicopper oxidase (IOX) produced by Iodidimonas sp. Q-1, an iodide (I)-oxidizing marine bacterium, exhibited significant decolorization activity toward various anionic dyes. In this study, the potential capacity of IOX for decolorization of cationic dyes such as malachite green (MG), crystal violet (CV), and methylene blue (MB) was determined.

Isolation and identification of Zalaria sp. Him3 as a novel fructooligosaccharides-producing yeast.

Aims: This study aimed at obtaining a novel fructooligosaccharides (FOS)-producing yeast, which was different from conventional FOS producers, Aureobasidium spp.

Methods And Results: Strain Him3 was newly isolated from a Japanese dried sweet potato as a FOS producer. The strain exhibited yeast-like cells and melanization on the potato dextrose agar medium, and formed very weak pseudomycelia on the yeast extract polypeptone dextrose agar medium.

Reductive deiodination of 2,4,6-triiodophenol by Vallitalea sp. strain TIP-1 isolated from the marine sponge.

An anaerobic microbial consortium capable of reductively dehalogenating 2,4,6-triiodophenol (2,4,6-TIP) was enriched from the marine sponge Hymeniacidon sinapium. The enrichment reductively deiodinated 100 μM of 2,4,6-TIP to 4-iodophenol (4-IP) and 2-iodophenol (2-IP) in the presence of sterile sponge tissue as the sole carbon source and electron donor. PCR-denaturing gradient gel electrophoresis and 16S rRNA gene sequence analysis revealed that bacteria closely related with Vallitalea guaymasensis and Oceanirhabdus sediminicola, both of which are members of the order Clostridiales, were predominant in the enrichment.

Complete Genome Sequence of sp. Strain SVR, an Antimonate-Reducing Bacterium Isolated from Antimony-Rich Mine Soil.

We report here the complete genome sequence of sp. strain SVR, isolated from antimony mine soil in Nakase Mine, Hyogo Prefecture, Japan. SVR strains proliferate using antimonate [Sb(V)] as an electron acceptor, providing insights into the antimony reduction mechanism.

Iodidimonas gelatinilytica sp. nov., aerobic iodide-oxidizing bacteria isolated from brine water and surface seawater.

Chemo-organotrophic iodide (I)-oxidizing bacterial strains Hi-2 and Mie-1 were isolated from iodide-rich natural gas brine water in Chiba and surface seawater in Mie, Japan, respectively. Cells of strains Hi-2 and Mie-1 were aerobic, Gram-negative and rod-shaped (0.3-0.

Production of two morphologically different antimony trioxides by a novel antimonate-reducing bacterium, Geobacter sp. SVR.

A novel dissimilatory antimonate [Sb(V)]-reducing bacterium, strain SVR, was isolated from soil of a former antimony (Sb) mine. Strain SVR coupled Sb(V) reduction to acetate oxidation with an apparent reduction rate of 2.4 mM d.

Possible Involvement of a Tetrathionate Reductase Homolog in Dissimilatory Arsenate Reduction by sp. Strain PSR-1.

sp. strain PSR-1, a dissimilatory arsenate [As(V)]-reducing bacterium, can utilize As(V) as a terminal electron acceptor for anaerobic respiration. A previous draft genome analysis revealed that strain PSR-1 lacks typical respiratory As(V) reductase genes (), which suggested the involvement of another protein in As(V) respiration.

Draft Genome Sequence of sp. Strain SVR, Isolated from Antimony Mine Soil.

We report here the draft genome sequence of sp. strain SVR, isolated from antimony mine soil in Hyogo Prefecture, Japan. The genome sequence data in this study will provide useful information for understanding bacterial antimonate reduction.

Diazotrophic Isolates from Soils.

Biological nitrogen fixation is an essential reaction in a major pathway for supplying nitrogen to terrestrial environments. Previous culture-independent analyses based on soil DNA/RNA/protein sequencing could globally detect the nitrogenase genes/proteins of (in the class ), commonly distributed in soil environments and predominant in paddy soils; this suggests the importance of in nitrogen fixation in soil environments. However, direct experimental evidence is lacking; there has been no research on the genetic background and ability of to fix nitrogen.

A novel dimethylsulfoxide reductase family of molybdenum enzyme, Idr, is involved in iodate respiration by Pseudomonas sp. SCT.

Pseudomonas sp. strain SCT is capable of using iodate (IO ) as a terminal electron acceptor for anaerobic respiration. A possible key enzyme, periplasmic iodate reductase (Idr), was visualized by active staining on non-denaturing gel electrophoresis.

Soil Microbial Communities Involved in Reductive Dissolution of Arsenic from Arsenate-Laden Minerals with Different Carbon Sources.

The natural microbial communities involved in arsenic (As) extraction under biostimulated conditions are still unclear. In this study, soil slurry was incubated with arsenate [As(V)]-laden Fe(III) or Al (hydr)oxides with lactate or acetate. After 40 d, dissolved As released from As(V)-laden Fe(III) accounted for 54% of the initial solid-phase As in lactate-amended slurries, while much less As was released from acetate-amended slurries.

Expression of Genes and Proteins Involved in Arsenic Respiration and Resistance in Dissimilatory Arsenate-Reducing sp. Strain OR-1.

The reduction of arsenate [As(V)] to arsenite [As(III)] by dissimilatory As(V)-reducing bacteria, such as spp., may play a significant role in arsenic release from anaerobic sediments into groundwater. The biochemical and molecular mechanisms by which these bacteria cope with this toxic element remain unclear.

Genomic Analysis of sp. Strain SCT, an Iodate-Reducing Bacterium Isolated from Marine Sediment, Reveals a Possible Use for Bioremediation.

Strain SCT is an iodate-reducing bacterium isolated from marine sediment in Kanagawa Prefecture, Japan. In this study, we determined the draft genome sequence of strain SCT and compared it to complete genome sequences of other closely related bacteria, including A phylogeny inferred from concatenation of core genes revealed that strain SCT was closely related to marine isolates of Genes present in the SCT genome but absent from the other analyzed genomes comprised clusters corresponding to putative prophage regions and possible operons. They included genes, which encode type IV pili for natural transformation; the operon, which encodes resistance systems for mercury; and the operon, which encodes a Pi-specific transport system for phosphate uptake.

Draft Genome Sequence of a Novel Lactate-Fermenting Bacterial Strain of the Family within the Class .

Here, we report a draft genome sequence of the bacterial strain FL31, a novel lactate-fermenting bacterium of the family within the class . This genome furthers our understanding of the physiological functions of this taxonomic group in natural environments.

Genomic Analysis of sp. Br-6, a Bromate Reducing Bacterium Isolated From Soil in Chiba, Japan.

Bromate is a byproduct of the ozone disinfection of drinking water. It is a genotoxic carcinogen and causes renal cell tumors in rats. Physicochemical removal of bromate is very difficult, making microbial reduction of bromate to bromide a promising approach to eliminate bromate from water.

Decolorization of recalcitrant dyes by a multicopper oxidase produced by Iodidimonas sp. Q-1 with iodide as a novel inorganic natural redox mediator.

A multicopper oxidase (IOX) produced by Iodidimonas sp. Q-1 has high catalytic efficiency for iodide (I) oxidation to form molecular iodine (I). In this study, the potential capacity of IOX for decolorization of recalcitrant dyes was determined.

Role of fungal laccase in iodide oxidation in soils.

Previously, we hypothesized that microbial laccase oxidizes iodide (I) in soils to molecular iodine (I) or hypoiodous acid (HIO), both of which are easily incorporated into natural soil organic matter, and thus plays a role in iodine sorption on soils. In this study, soil iodide oxidase activity was determined by a colorimetric assay to evaluate if laccase is responsible for iodide oxidation in soils. Three types of Japanese soil showed significant iodide oxidase activities (0.