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Microbial Genetics of Extreme Environments
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Microbial Genetics of Extreme Environments

A special issue of Genes (ISSN 2073-4425). This special issue belongs to the section "Microbial Genetics and Genomics".

Deadline for manuscript submissions: closed (15 September 2022) | Viewed by 3802

Special Issue Editor

Prof. Dr. Ricardo I. Amils

E-Mail Website
Guest Editor
1. Centro de Biología Molecular Severo Ochoa (CSIC-UAM), Universidad Autónoma de Madrid, Madrid, Spain
2. Centro de Astrobiología (CSIC-INTA), Torrejón de Ardoz, Spain
Interests: bacteria; genetics; genomics and comparative genomics; archaea

Special Issue Information

Dear Colleagues, 

We would like to invite you to participate in this Special Issue, “Microbial Genetics of Extreme Environments”.

Since the discovery in the last century, against the common knowledge that life was extremely robust and capable of developing in many extreme environments, the field of extremophiles has grown exponentially in attempts to determine the limits of life, understand their adaptation strategies to different stressors, and develop biotechnological applications from their cellular components.  From low to high temperatures, from acidic to alkaliphilic conditions, from low to high ionic conditions, from the absence to high levels of radiation, the list of extreme environments in which organisms can develop is increasing.

The purpose of this Special Issue is to host research and review papers on recent developments in the genetics of extremophiles trying to understand the strategies used to adapt to different extreme environments and to search for new biotechnological applications.  We encourage researchers on recent identified extreme environments to send their contributions to this Special Issue.

Prof. Dr. Ricardo I. Amils
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Genes is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • bacteria
  • archaea
  • eukaryotes
  • genetics
  • molecular adaptations
  • genomics and comparative genomics
  • horizontal gene transfer
  • virus
  • biotechnological applications

Published Papers (2 papers)

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Research

14 pages, 2486 KiB  
Article
Vitamin B12 Auxotrophy in Isolates from the Deep Subsurface of the Iberian Pyrite Belt
by Guillermo Mateos, Adrián Martínez-Bonilla, José M. Martínez and Ricardo Amils
Genes 2023, 14(7), 1339; https://0-doi-org.brum.beds.ac.uk/10.3390/genes14071339 - 26 Jun 2023
Viewed by 1252
Abstract
Vitamin B12 is an enzymatic cofactor that is essential for both eukaryotes and prokaryotes. The development of life in extreme environments depends on cofactors such as vitamin B12 as well. The genomes of twelve microorganisms isolated from the deep subsurface of [...] Read more.
Vitamin B12 is an enzymatic cofactor that is essential for both eukaryotes and prokaryotes. The development of life in extreme environments depends on cofactors such as vitamin B12 as well. The genomes of twelve microorganisms isolated from the deep subsurface of the Iberian Pyrite Belt have been analyzed in search of enzymatic activities that require vitamin B12 or are involved in its synthesis and import. Results have revealed that vitamin B12 is needed by these microorganisms for several essential enzymes such as ribonucleotide reductase, methionine synthase and epoxyqueosine reductase. Isolate Desulfosporosinus sp. DEEP is the only analyzed genome that holds a set core of proteins that could lead to the production of vitamin B12. The rest are dependent on obtaining it from the subsurface oligotrophic environment in which they grow. Sought proteins involved in the import of vitamin B12 are not widespread in the sample. The dependence found in the genomes of these microorganisms is supported by the production of vitamin B12 by microorganisms such as Desulfosporosinus sp. DEEP, showing that the operation of deep subsurface biogeochemical cycles is dependent on cofactors such as vitamin B12. Full article
(This article belongs to the Special Issue Microbial Genetics of Extreme Environments)
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26 pages, 3158 KiB  
Article
Comparative Genomic Analysis of Antarctic Pseudomonas Isolates with 2,4,6-Trinitrotoluene Transformation Capabilities Reveals Their Unique Features for Xenobiotics Degradation
by Ma. Ángeles Cabrera, Sebastián L. Márquez and José M. Pérez-Donoso
Genes 2022, 13(8), 1354; https://0-doi-org.brum.beds.ac.uk/10.3390/genes13081354 - 28 Jul 2022
Cited by 13 | Viewed by 1984
Abstract
The nitroaromatic explosive 2,4,6-trinitrotoluene (TNT) is a highly toxic and persistent environmental pollutant. Since physicochemical methods for remediation are poorly effective, the use of microorganisms has gained interest as an alternative to restore TNT-contaminated sites. We previously demonstrated the high TNT-transforming capability of [...] Read more.
The nitroaromatic explosive 2,4,6-trinitrotoluene (TNT) is a highly toxic and persistent environmental pollutant. Since physicochemical methods for remediation are poorly effective, the use of microorganisms has gained interest as an alternative to restore TNT-contaminated sites. We previously demonstrated the high TNT-transforming capability of three novel Pseudomonas spp. isolated from Deception Island, Antarctica, which exceeded that of the well-characterized TNT-degrading bacterium Pseudomonas putida KT2440. In this study, a comparative genomic analysis was performed to search for the metabolic functions encoded in the genomes of these isolates that might explain their TNT-transforming phenotype, and also to look for differences with 21 other selected pseudomonads, including xenobiotics-degrading species. Comparative analysis of xenobiotic degradation pathways revealed that our isolates have the highest abundance of key enzymes related to the degradation of fluorobenzoate, TNT, and bisphenol A. Further comparisons considering only TNT-transforming pseudomonads revealed the presence of unique genes in these isolates that would likely participate directly in TNT-transformation, and others involved in the β-ketoadipate pathway for aromatic compound degradation. Lastly, the phylogenomic analysis suggested that these Antarctic isolates likely represent novel species of the genus Pseudomonas, which emphasizes their relevance as potential agents for the bioremediation of TNT and other xenobiotics. Full article
(This article belongs to the Special Issue Microbial Genetics of Extreme Environments)
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