Surface tension and toxicity changes during biodegradation of carbazole by newly isolated methylotrophic strain Methylobacterium sp. GPE1

Pasternak, Grzegorz; Kołwzan, B.

doi:10.1016/j.ibiod.2012.07.021

Cited by 21 publications

(9 citation statements)

References 34 publications

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“…DBT-sulfone is more polar than DBT due to the presence of the two oxygen atoms (sulfonyl group). Growth of AK6U on either DBT or DBT-sulfone as a sole sulfur source indicates its ability to obtain sulfur from these two substrates in a process known as biodesulfurization (Gallagher et al, 1993;Chen et al, 2008).The observed culture foaming is a preliminary indication of biosurfactants production (Ismail et al, 2013;Pasternak and Kotwzan, 2013). Results of the surface tension measurements were in agreement with the culture foaming trends.…”

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confidence: 68%

Microbiotechnology Based Surfactants and Their Applications

Rahman¹

2016

Frontiers Research Topics

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PublisherFrontiers in Microbiology About FrontiersFrontiers is more than just an open-access publisher of scholarly articles: it is a pioneering approach to the world of academia, radically improving the way scholarly research is managed. The grand vision of Frontiers is a world where all people have an equal opportunity to seek, share and generate knowledge. Frontiers provides immediate and permanent online open access to all its publications, but this alone is not enough to realize our grand goals. Frontiers Journal SeriesThe Frontiers Journal Series is a multi-tier and interdisciplinary set of open-access, online journals, promising a paradigm shift from the current review, selection and dissemination processes in academic publishing. All Frontiers journals are driven by researchers for researchers; therefore, they constitute a service to the scholarly community. At the same time, the Frontiers Journal Series operates on a revolutionary invention, the tiered publishing system, initially addressing specific communities of scholars, and gradually climbing up to broader public understanding, thus serving the interests of the lay society, too. Dedication to QualityEach Frontiers article is a landmark of the highest quality, thanks to genuinely collaborative interactions between authors and review editors, who include some of the world's best academicians. Research must be certified by peers before entering a stream of knowledge that may eventually reach the public -and shape society; therefore, Frontiers only applies the most rigorous and unbiased reviews. Frontiers revolutionizes research publishing by freely delivering the most outstanding research, evaluated with no bias from both the academic and social point of view. By applying the most advanced information technologies, Frontiers is catapulting scholarly publishing into a new generation. What are Frontiers Research Topics?Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: researchtopics@frontiersin.org 2 February 2016 | Microbiotechnology Based Surfactants and Their Applications Frontiers in MicrobiologyBiosurfactants are structurally diverse group of bioactive molecules produced by a variety of microorganisms. They are secondary metabolites that accumulate at interfaces, reduce surface tension and form micellar aggregates. This research topic describes few novel microbial strains with a focus on increasing our understanding of genetics, physiology, regulation of biosurfactant production and their commercial potentials. A major stumbling block in the commercialization of b...

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confidence: 68%

Microbiotechnology Based Surfactants and Their Applications

Rahman¹

2016

Frontiers Research Topics

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“…The low water solubility of cypermethrin [8] limits its availability to microorganisms and could potentially lower the microbial capacity to degrade this hydrophobic compound in aqueous medium. During growth on cypermethrin, strain A-1 quickly emulsified the pyrethroid, possibly due to the production of biosurfactants, as other studies have described [15,36]. The formation of stable emulsions can enhance the bioavailability of cypermethrin and consequently, can help direct absorption of the lipophilic molecule into the microbial cells.…”

Section: Discussionmentioning

confidence: 92%

Characterization of a cypermethrin‐degrading Methylobacterium sp. strain A‐1 and molecular cloning of its carboxylesterase gene

Diegelmann

Weber

Heinzel‐Wieland

et al. 2015

J. Basic Microbiol.

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A novel mesophilic bacterial strain, designated A-1, was isolated from microbially contaminated biopolymer microcapsules. The bacterium was able to withstand and grow in liquid cultures supplemented with the pyrethroid cypermethrin in concentrations up to 400 mg L(-1) . Furthermore, strain A-1 could use cypermethrin as sole carbon source and could degrade >50% of it in 12 h. Based on phenotypic and chemotaxonomic characterization, and phylogenetic analysis of 16S rRNA gene sequence, the strain A-1 was identified as Methylobacterium sp., which is the first reported cypermethrin degrader of methylotrophic bacteria. A role for esterase activity in cypermethrin biodegradation was presumed. Therefore, the carboxylesterase gene mse1 was amplified from the Methylobacterium sp. strain A-1 genome and the resulting 1 kb amplicon cloned into E. coli. Sequence analysis of the mse1-DNA insert revealed an open reading frame of 633 bp encoding for a putative carboxylesterase of 210 amino acid residues with a predicted molecular mass of 22 kDa. The amino acid sequence of the deduced enzyme MsE1 with the catalytic triad Ser106 , Asp156 , and His187 was found to be similar to that of α/β-hydrolase fold proteins. The active site Ser106 residue is located in the consensus pentapeptide motif Gly-X-Ser-X-Gly that is typical of esterases.

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“…Methylobacterum species can degrade complex organic molecules, including refractory compounds [26,27]. In the bark environment, they could access difficult to degrade plant-derived molecules as carbon sources.…”

Section: Discussionmentioning

confidence: 99%

Type II photosynthetic reaction center genes of avocado (Persea americanaMill.) bark microbial communities are dominated by aerobic anoxygenic Alphaproteobacteria

Aguirre‐von‐Wobeser

2020

Preprint

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The tree bark environment is an important microbial habitat distributed worldwide on thrillions of trees. However, the microbial communities of tree bark are largely unknown, with most studies on plant aerial surfaces focused on the leaves. Recently, we presented a metagenomic study of bark microbial communities from avocado. In these communities, oxygenic and anoxygenic photosynthesis genes were very abundant, especially when compared to rhizospheric soil from the same trees. In this work, Evolutionary Placement Algorithm analysis was performed on metagenomic reads orthologous to the PufLM gene cluster, encoding for the bacterial type II photosynthetic reaction center. These photosynthetic genes were found affiliated to different groups of bacteria, mostly aerobic anoxygenic photosynthetic Alphaproteobacteria, including Sphingomonas, Methylobacterium and several Rhodospirillales. These results suggest that anoxygenic photosynthesis in avocado bark microbial communities functions primarily as additional energy source for heterotrophic growth. Together with our previous results, showing a large abundance of cyanobacteria in these communities, a picture emerges of the tree holobiont, where light penetrating the trees canopies and reaching the inner stems, including the trunk, is probably utilized by cyanobacteria for oxygenic photosynthesis, and the far-red light aids the growth of aerobic anoxygenic photosynthetic bacteria.

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Surface tension and toxicity changes during biodegradation of carbazole by newly isolated methylotrophic strain Methylobacterium sp. GPE1

Cited by 21 publications

References 34 publications

Microbiotechnology Based Surfactants and Their Applications

Microbiotechnology Based Surfactants and Their Applications

Characterization of a cypermethrin‐degrading Methylobacterium sp. strain A‐1 and molecular cloning of its carboxylesterase gene

Type II photosynthetic reaction center genes of avocado (Persea americanaMill.) bark microbial communities are dominated by aerobic anoxygenic Alphaproteobacteria

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