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Advanced Research in Marine Microbial Resources: Focus on Novel Taxa,...
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Advanced Research in Marine Microbial Resources: Focus on Novel Taxa, Enzymes and Compounds

A special issue of Journal of Marine Science and Engineering (ISSN 2077-1312). This special issue belongs to the section "Marine Biology".

Deadline for manuscript submissions: 10 June 2024 | Viewed by 3310

Special Issue Editors

Dr. Xue-Wei Xu

E-Mail Website
Guest Editor
Key Laboratory of Marine Ecosystem Dynamics, Ministry of Natural Resources and Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China
Interests: marine microorganisms; marine ecology; microbial taxonomy; enzyme; deep sea mining
Dr. Lin Xu

E-Mail Website
Guest Editor
College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou 310018, China
Interests: marine bacteria; taxonomy; prokaryotic genomics; evolution
Dr. Bin Wei

E-Mail Website
Guest Editor
School of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, China
Interests: marine drugs; natural products; genome mining; bioinformatics
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Oceans are dominated by microbial species including bacteria, archaea and fungi that are essential for marine ecosystems and have central roles in biogeochemical cycles, influencing our human beings. Recent rapid developments in molecular ecology, metagenomics and ecological modeling illustrate that marine microbes represent the most important biological grouping on earth in terms of phylogenetic and functional diversity. Furthermore, marine microbial enzymes and natural compounds including esterase, lipase, collagenase, agarase, cellulose, terpenes, sterols, alkaloids, glycosides and polysaccharides are important in different industrial areas due to their properties and applications. Thus, novel taxa, enzymes and compounds of marine microbes are worthy of attention to accelerate their applications and developments.

This Special Issue is devoted to collecting novel research on marine novel microbial taxa, enzymes and compounds with industrial applications and aims to contribute to highlighting recent findings and acquiring a comprehensive perspective on the current status of this broad research field. Moreover, reviews on successes and central issues will also be acknowledged.

Dr. Xue-Wei Xu
Dr. Lin Xu
Dr. Bin Wei
Guest Editors

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. Journal of Marine Science and Engineering 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

  • marine microbes
  • taxonomy
  • enzymology
  • drugs
  • industrial application

Published Papers (3 papers)

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Research

26 pages, 7973 KiB  
Article
Fucanases Related to the GH107 Family from Members of the PVC Superphylum
by Jessica A. Gonzalez, Nora M. A. Ponce, Mariana Lozada, Yasmín Daglio, Carlos A. Stortz and Hebe M. Dionisi
J. Mar. Sci. Eng. 2024, 12(1), 181; https://doi.org/10.3390/jmse12010181 - 18 Jan 2024
Viewed by 885
Abstract
The glycoside hydrolase 107 (GH107) family includes fucanase enzymes from only two bacterial phyla, Bacteroidota and Pseudomonadota. The goal of this work was to explore the diversity of putative fucanase enzymes related to this family in organisms of the PVC superphylum (Planctomycetota, Verrucomicrobiota, [...] Read more.
The glycoside hydrolase 107 (GH107) family includes fucanase enzymes from only two bacterial phyla, Bacteroidota and Pseudomonadota. The goal of this work was to explore the diversity of putative fucanase enzymes related to this family in organisms of the PVC superphylum (Planctomycetota, Verrucomicrobiota, Chlamydiota), in order to expand our knowledge of the fucoidan-degrading potential in this ecologically and biotechnologically relevant group. Using hidden Markov model- and peptide-based annotation tools, 26 GH107 homolog sequences were identified in metagenome and genome datasets. The sequences formed two distinct clusters in a phylogenetic analysis, only one including members of the GH107 family. The endo-acting fucoidan degrading activity was confirmed in an enzyme included in the most divergent cluster. The fucanase, which probably originated in an uncultured planctomycete from the sampled subantarctic sediments, was cloned and expressed in Escherichia coli. The enzyme catalyzed the rapid hydrolysis of internal glycosidic bonds of fucoidan from Macrocystis pyrifera, a macroalgae species abundant at the site. It was active in a wide range of temperatures (5–45 °C), salinities (9.5–861 mM NaCl), and pH values (4.5–9), mainly producing sulfated α-(1,3)-linked fuco-oligosaccharides of various lengths. The PVC superphylum represents a promising source of fucanase enzymes with various biotechnological applications. Full article
(This article belongs to the Special Issue Advanced Research in Marine Microbial Resources: Focus on Novel Taxa, Enzymes and Compounds)
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18 pages, 5744 KiB  
Article
Isolation and Cultivation of Carotenoid-Producing Strains from Tidal Flat Sediment and Proposal of Croceibacterium aestuarii sp. nov., a Novel Carotenoid-Producing Species in the Family Erythrobacteraceae
by Xiao-Yan Sun, Han Dong, Yu Zhang, Jia-Wei Gao, Peng Zhou, Cong Sun and Lin Xu
J. Mar. Sci. Eng. 2024, 12(1), 99; https://doi.org/10.3390/jmse12010099 - 03 Jan 2024
Viewed by 834
Abstract
Carotenoids are extensively used in drugs, cosmetics, nutrients, and foods, owing to their antioxidant and anti-inflammatory characteristics. Diverse marine heterotrophic prokaryotes can accumulate carotenoids and become promising alternatives for the advancement of carotenoids production. In this research, 55 strains were isolated and cultivated [...] Read more.
Carotenoids are extensively used in drugs, cosmetics, nutrients, and foods, owing to their antioxidant and anti-inflammatory characteristics. Diverse marine heterotrophic prokaryotes can accumulate carotenoids and become promising alternatives for the advancement of carotenoids production. In this research, 55 strains were isolated and cultivated from tidal flat sediment in Zhoushan and classified into the phyla Pseudomonadota (n = 24), Bacillota (n = 18), Bacteroidota (n = 9), and Actinomycetota (n = 4). Nine of them accumulated carotenoids, and most of them belonged to the families Flavobacteriaceae (n = 4) and Erythrobacteraceae (n = 4). Among those carotenoid-producing strains, one strain, designated as D39T, was proposed as one novel species belonging to the genus Croceibacterium through polyphasic taxonomy approaches. Genomic annotations and carotenoid compound determinations revealed that strain D39T encoded crtEBIYZG genes and mainly accumulated zeaxanthin as major carotenoids. Furthermore, carotenoid biosynthesis pathway in the majority of Croceibacterium strains were identical with that in the strain D39T, implying that Croceibacterium members can be sources of producing zeaxanthin. This study enhances knowledge of microbial biodiversity in tidal flats, proposes a novel carotenoid-producing Croceibacterium species, and elucidates carotenoid biosynthesis pathway in the genus Croceibacterium, which contribute to enriching marine carotenoid-producing strains and promoting a comprehensive insight into genomic contents of them. Full article
(This article belongs to the Special Issue Advanced Research in Marine Microbial Resources: Focus on Novel Taxa, Enzymes and Compounds)
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24 pages, 5390 KiB  
Article
Revealing Heavy Metal-Resistant Mechanisms and Bioremediation Potential in a Novel Croceicoccus Species Using Microbial-Induced Carbonate Precipitation
by Xuya Lv, Yingwen Zhong, Geyi Fu, Yuehong Wu and Xuewei Xu
J. Mar. Sci. Eng. 2023, 11(11), 2195; https://doi.org/10.3390/jmse11112195 - 18 Nov 2023
Cited by 2 | Viewed by 1133
Abstract
Polymetallic nodules and polymetallic sulfides are currently the major mineral resources found on the seabed. The motivation behind deep-sea mining arises from the pursuit of valuable metals, driven by both economic and geopolitical considerations. However, before mining can be authorized, it is crucial [...] Read more.
Polymetallic nodules and polymetallic sulfides are currently the major mineral resources found on the seabed. The motivation behind deep-sea mining arises from the pursuit of valuable metals, driven by both economic and geopolitical considerations. However, before mining can be authorized, it is crucial to understand the microbial adaptation and biomineralization process related to heavy metals in deep-sea environments. To search for potential candidate materials for bioremediation in deep-sea environment, two strains with high resistance to manganese and the ability to form rhodochrosite precipitates were isolated from the deep-sea polymetallic nodule areas and hydrothermal polymetallic sulfide areas. Genomic analysis revealed that the strains employed various effective survival strategies, such as motility, chemotaxis, biofilm formation, metal redox, and transporters, to adapt to heavy metal environments. The bacterial strains Ery5 and Ery15 promote the formation of carbonate crystals by creating an excessively alkaline environment and releasing extracellular polymeric substances (EPSs). Furthermore, strains Ery5 and Ery15 were identified using polyphasic taxonomy methods and proposed as a new species belonging to the genus Croceicoccus. This study presents potential candidates for bioremediation in deep-sea environments. Full article
(This article belongs to the Special Issue Advanced Research in Marine Microbial Resources: Focus on Novel Taxa, Enzymes and Compounds)
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