Streptomyces and Biosynthesis

A special issue of Microorganisms (ISSN 2076-2607). This special issue belongs to the section "Microbial Biotechnology".

Deadline for manuscript submissions: closed (31 May 2023) | Viewed by 3921

Special Issue Editors


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Guest Editor
Explogen LLC, Lviv, Ukraine
Interests: secondary metabolites biosynthesis; genetics and genomics of actinobacteria; metabolic engineering of actinobacteria

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Guest Editor
Department of Genetics and Biotechnology, Ivan Franko National University of Lviv, Hrushevskoho St. 4, Rm. 102, 79005 Lviv, Ukraine
Interests: bacterial genetics; with a focus on antibiotic-producing actinobacteria; regulation of antibiotics biosynthesis; codon-based mechanisms of regulation of gene expression
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Special Issue Information

Dear Colleagues,

Actinobacteria, and particularly the Streptomyces genus, remain one of the major sources of natural products. The advances in genome sequencing and analysis accompanied with tools and approaches for cloning and activating biosynthetic gene clusters changed the paradigm of the discovery of bacterial natural products. The classic way “from compound to gene” is now reversed. This facilitated the identification of metabolites with new structures and biosynthetic pathways, often involving new biochemistry, by cloning and manipulating gene clusters.

This Special Issue of Microorganisms aims to present a collection of articles describing the structural diversity of natural products of actinobacterial origin with a specific focus on respective biosynthetic pathways, covering the assembly of new compounds and their modification reactions. We also welcome reviews dedicated to the topic of this Special Issue, as well as research articles covering the activation of cryptic biosynthetic gene clusters and the regulation of specialized metabolism in actinobacteria.

Dr. Yuriy V. Rebets
Dr. Bohdan Ostash
Guest Editors

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Keywords

  • actinobacteria
  • streptomyces
  • secondary metabolites
  • specialized metabolites
  • antibiotics
  • biosynthetic gene cluster
  • biosynthetic pathway

Published Papers (2 papers)

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Research

21 pages, 4348 KiB  
Article
Co-Expression of Transcriptional Regulators and Housekeeping Genes in Streptomyces spp.: A Strategy to Optimize Metabolite Production
by Lorena Cuervo, Mónica G. Malmierca, Raúl García-Salcedo, Carmen Méndez, José A. Salas, Carlos Olano and Ana Ceniceros
Microorganisms 2023, 11(6), 1585; https://doi.org/10.3390/microorganisms11061585 - 15 Jun 2023
Cited by 4 | Viewed by 1742
Abstract
The search for novel bioactive compounds to overcome resistance to current therapeutics has become of utmost importance. Streptomyces spp. are one of the main sources of bioactive compounds currently used in medicine. In this work, five different global transcriptional regulators and five housekeeping [...] Read more.
The search for novel bioactive compounds to overcome resistance to current therapeutics has become of utmost importance. Streptomyces spp. are one of the main sources of bioactive compounds currently used in medicine. In this work, five different global transcriptional regulators and five housekeeping genes, known to induce the activation or overproduction of secondary metabolites in Streptomyces coelicolor, were cloned in two separated constructs and expressed in 12 different strains of Streptomyces spp. from the in-house CS collection. These recombinant plasmids were also inserted into streptomycin and rifampicin resistant Streptomyces strains (mutations known to enhance secondary metabolism in Streptomyces). Different media with diverse carbon and nitrogen sources were selected to assess the strains’ metabolite production. Cultures were then extracted with different organic solvents and analysed to search for changes in their production profiles. An overproduction of metabolites already known to be produced by the biosynthesis wild-type strains was observed such as germicidin by CS113, collismycins by CS149 and CS014, or colibrimycins by CS147. Additionally, the activation of some compounds such as alteramides in CS090a pSETxkBMRRH and CS065a pSETxkDCABA or inhibition of the biosynthesis of chromomycins in CS065a in pSETxkDCABA when grown in SM10 was demonstrated. Therefore, these genetic constructs are a relatively simple tool to manipulate Streptomyces metabolism and explore their wide secondary metabolites production potential. Full article
(This article belongs to the Special Issue Streptomyces and Biosynthesis)
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12 pages, 2000 KiB  
Article
Properties of Multidrug-Resistant Mutants Derived from Heterologous Expression Chassis Strain Streptomyces albidoflavus J1074
by Borys Dolya, Olena Hryhorieva, Khrystyna Sorochynska, Maria Lopatniuk, Iryna Ostash, Vasylyna-Marta Tseduliak, Eva Baggesgaard Sterndorff, Tue Sparholt Jørgensen, Tetiana Gren, Yuriy Dacyuk, Tilmann Weber, Andriy Luzhetskyy, Victor Fedorenko and Bohdan Ostash
Microorganisms 2023, 11(5), 1176; https://doi.org/10.3390/microorganisms11051176 - 30 Apr 2023
Cited by 1 | Viewed by 1570
Abstract
Streptomyces albidoflavus J1074 is a popular platform to discover novel natural products via the expression of heterologous biosynthetic gene clusters (BGCs). There is keen interest in improving the ability of this platform to overexpress BGCs and, consequently, enable the purification of specialized metabolites. [...] Read more.
Streptomyces albidoflavus J1074 is a popular platform to discover novel natural products via the expression of heterologous biosynthetic gene clusters (BGCs). There is keen interest in improving the ability of this platform to overexpress BGCs and, consequently, enable the purification of specialized metabolites. Mutations within gene rpoB for the β-subunit of RNA polymerase are known to increase rifampicin resistance and augment the metabolic capabilities of streptomycetes. Yet, the effects of rpoB mutations on J1074 remained unstudied, and we decided to address this issue. A target collection of strains that we studied carried spontaneous rpoB mutations introduced in the background of the other drug resistance mutations. The antibiotic resistance spectra, growth, and specialized metabolism of the resulting mutants were interrogated using a set of microbiological and analytical approaches. We isolated 14 different rpoB mutants showing various degrees of rifampicin resistance; one of them (S433W) was isolated for the first time in actinomycetes. The rpoB mutations had a major effect on antibiotic production by J1074, as evident from bioassays and LC-MS data. Our data support the idea that rpoB mutations are useful tools to enhance the ability of J1074 to produce specialized metabolites. Full article
(This article belongs to the Special Issue Streptomyces and Biosynthesis)
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