MerP/MerT-mediated mechanism: A different approach to mercury resistance and bioaccumulation by marine bacteria

Zhang, Jinlong; Zeng, Yiting; Liu, Bing; Deng, Xu

doi:10.1016/j.jhazmat.2020.122062

Cited by 25 publications

(12 citation statements)

References 33 publications

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“…These genes are often located in plasmids or transposons, but may also be found in chromosomes. MerP scavenges and transports inorganic Hg 2+ to MerT at the plasma membrane, and then MerT transports it inside the cells where it is reduced to Hg 0 by the flavoenzyme mercury reductase MerA ( Barkay et al, 2003 ; Zhang et al, 2020 ). MerE is another Hg 2+ transporter, while MerF and MerC mediate phenylmercury transport into cells ( Sone et al, 2013 ).…”

Section: Resultsmentioning

confidence: 99%

Characterization and genomic analysis of two novel psychrotolerant Acidithiobacillus ferrooxidans strains from polar and subpolar environments

et al. 2022

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The bioleaching process is carried out by aerobic acidophilic iron-oxidizing bacteria that are mainly mesophilic or moderately thermophilic. However, many mining sites are located in areas where the mean temperature is lower than the optimal growth temperature of these microorganisms. In this work, we report the obtaining and characterization of two psychrotolerant bioleaching bacterial strains from low-temperature sites that included an abandoned mine site in Chilean Patagonia (PG05) and an acid rock drainage in Marian Cove, King George Island in Antarctic (MC2.2). The PG05 and MC2.2 strains showed significant iron-oxidation activity and grew optimally at 20°C. Genome sequence analyses showed chromosomes of 2.76 and 2.84 Mbp for PG05 and MC2.2, respectively, and an average nucleotide identity estimation indicated that both strains clustered with the acidophilic iron-oxidizing bacterium Acidithiobacillus ferrooxidans. The Patagonian PG05 strain had a high content of genes coding for tolerance to metals such as lead, zinc, and copper. Concordantly, electron microscopy revealed the intracellular presence of polyphosphate-like granules, likely involved in tolerance to metals and other stress conditions. The Antarctic MC2.2 strain showed a high dosage of genes for mercury resistance and low temperature adaptation. This report of cold-adapted cultures of the At. ferrooxidans species opens novel perspectives to satisfy the current challenges of the metal bioleaching industry.

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Section: Resultsmentioning

confidence: 99%

Characterization and genomic analysis of two novel psychrotolerant Acidithiobacillus ferrooxidans strains from polar and subpolar environments

et al. 2022

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“…MerA from Paraburkholderia fungorum was used as an outgroup. Pseudomonas stutzeri [26], and Pseudomonas pseudoalcaligenes [27].…”

Section: Discussionmentioning

confidence: 99%

Draft genome sequence of Pseudomonas sp. A46 isolated from mercury‐contaminated wastewater

Liu

et al. 2022

J Basic Microbiol

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Pseudomonas sp. A46 was first isolated from mercury-contaminated groundwater in Taiwan. This study is the first to report the draft whole-genome sequence of Pseudomonas sp. A46. Its genome consists of 126 contigs, with a total length of 6,782,516 bp and a GC content of 64.7%. Phylogenetic analysis based on 16 S rRNA gene sequences revealed that Pseudomonas sp. A46 is closely related to Pseudomonas citronellolis. Assessment of the draft genome sequence revealed that Pseudomonas sp. A46 harbors sets of genes conferring resistance to heavy metals, such as mercury, zinc, lead, copper, cadmium, chromate, and arsenate.These identified genes enable this bacterium to tolerate heavy metal stress.

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“…Mercury resistance in the environment might be due to the presence of merT and merP genes in Winogradskyella luteol WHY3 T and Winogradskyella ouciana ZXX205 T , as described as a different approach to mercury resistance and bioaccumulation by marine bacteria (Zhang et al 2020).…”

Section: Winogradskyellamentioning

confidence: 99%

Winogradskyella luteola sp.nov., Erythrobacter ani sp. nov., and Erythrobacter crassostrea sp.nov., isolated from the hemolymph of the Pacific Oyster Crassostrea gigas

et al. 2022

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Three new bacterial strains, WHY3T, WH131T, and WH158T, were isolated and described from the hemolymph of the Pacific oyster Crassostrea gigas utilizing polyphasic taxonomic techniques. The 16S rRNA gene sequence analysis revealed that strain WHY3T was a member of the genus Winogradskyella, whereas strains WHI31T and WH158T were members of the genus Erythrobacter. According to the polygenomic study the three strains formed individual lineages with strong bootstrap support. The comparison of dDDH-and ANI values, percentage of conserved proteins (POCP), and average amino acid identity (AAl) between the three strains and their relatives established that the three strains represented two separate genera. Menaquinone-6 was reported as the major respiratory quinone in strain WHY3T and Ubiquinone-10 for strains WH131T and WH158T, respectively. The major cellular fatty acids for strain WHY3T were C15:0, anteiso-C15:1 ω7c, iso-C15:0, C16:1ω7c. The major cellular fatty acids for strains WH131T and WH158T were C14:02-OH and t18:1ω12 for WH131T and C17:0, and C18:1ω7c for strain WH158T. Positive Sudan Black B staining Indicated the presence of polyhydroxyalkanoic acid granules for strains WH131T and WH158T but not for strain WHY3T. The DNA G + C contents of strains WHY3T, WH131T and WH158T were 34.4, 59.7 and 56.6%, respectively. Gene clusters predicted some important genes involved in the bioremediation process. Due to the accomplishment of polyphasic taxonomy, we propose three novel species Winogradskyella luteola sp.nov. (type strain WHY3T = DSM 111804T = NCCB 100833T), Erythrobacter ani sp.nov. (WH131T = DSM 112099T = NCCB 100824T) and Erythrobacter crassostrea sp.nov. (WH158T = DSM 112102T = NCCB 100877T).

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MerP/MerT-mediated mechanism: A different approach to mercury resistance and bioaccumulation by marine bacteria

Cited by 25 publications

References 33 publications

Characterization and genomic analysis of two novel psychrotolerant Acidithiobacillus ferrooxidans strains from polar and subpolar environments

Characterization and genomic analysis of two novel psychrotolerant Acidithiobacillus ferrooxidans strains from polar and subpolar environments

Draft genome sequence of Pseudomonas sp. A46 isolated from mercury‐contaminated wastewater

Winogradskyella luteola sp.nov., Erythrobacter ani sp. nov., and Erythrobacter crassostrea sp.nov., isolated from the hemolymph of the Pacific Oyster Crassostrea gigas

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