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Genomics of Cyanobacterial Adaptability and Diversity
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Genomics of Cyanobacterial Adaptability and Diversity

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

Deadline for manuscript submissions: closed (20 September 2023) | Viewed by 2777

Special Issue Editors

Dr. Hua Li

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Guest Editor
Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, 430072 Wuhan, China
Interests: cyanobacterial diversity; adaptability; functionality; primary succession
Dr. Da Huo

E-Mail
Guest Editor
Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, 430072 Wuhan, China
Interests: cyanobacterial genomics; evolution process; environmental behaviors

Special Issue Information

Dear Colleagues,

Cyanobacteria constitute the one and only prokaryotic clade in the biosphere that performs oxygenic photosynthesis. In the long evolutionary process, they thrived on diverse systems for billions of years, changed the early environment of Earth, and thus built a broad way for the emergence of more complex life. Cyanobacterial phylogeny generates thousands of species with differentiated morphotypes and physiological characteristics and preferring habitats ranging from coccoid to filamentous, free-living to symbiotic, and aquatic to terrestrial environments. With the development of genomic sequencing technology, we are stepping into a period of unprecedented understanding on the speciation, environmental adaptation, and functionality of cyanobacteria.

In this Special Issue on cyanobacteria, we aim to compile review articles and original research that address ecological and evolutionary questions and novel species of cyanobacteria from the perspective of genomics. All potential habitats of cyanobacteria, including planktonic, benthic, terrestrial, aericolous, as well as industrial systems, are considered to fall within the scope. We invite submissions that discuss genomic features, the expansion or streamlining of gene families, and evolutionary events (e.g., horizontal gene transfer), and their functional consequences for adaptability under different environments. Furthermore, studies using metagenomic/multi-omics approaches to link the complex phylogeny of cyanobacteria to their roles of ecosystem functionality are also encouraged.

The goal is for this Special Issue to give readers an opportunity to learn more about recent advances in the field. We look forward to your contributions.

Dr. Hua Li
Dr. Da Huo
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. 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

  • cyanobacteria
  • comparative genomics
  • biodiversity
  • environmental adaptability
  • functional genomic analysis
 

Published Papers (2 papers)

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Research

17 pages, 3297 KiB  
Article
Sll1252 Coordinates Electron Transport between Plastoquinone and Cytochrome b6/f Complex in Synechocystis PCC 6803
by Radha Rani Balaga, Fumihiro Itoh, Suraj Chauhan, Mukulika Mandal, Pilla Sankara Krishna, Iwane Suzuki and Jogadhenu S. S. Prakash
Genes 2023, 14(12), 2151; https://doi.org/10.3390/genes14122151 - 28 Nov 2023
Viewed by 892
Abstract
A mutant, Δsll1252ins, was generated to functionally characterize Sll1252. Δsll1252ins exhibited a slow-growth phenotype at 70 µmol photons m−2 s−1 and glucose sensitivity. In Δsll1252ins, the rate of PSII activity was not affected, [...] Read more.
A mutant, Δsll1252ins, was generated to functionally characterize Sll1252. Δsll1252ins exhibited a slow-growth phenotype at 70 µmol photons m−2 s−1 and glucose sensitivity. In Δsll1252ins, the rate of PSII activity was not affected, whereas the whole chain electron transport activity was reduced by 45%. The inactivation of sll1252 led to the upregulation of genes, which were earlier reported to be induced in DBMIB-treated wild-type, suggesting that Sll1252 may be involved in electron transfer from the reduced-PQ pool to Cyt b6/f. The inhibitory effect of DCMU on PSII activity was similar in both wild-type and Δsll1252ins. However, the concentration of DBMIB for 50% inhibition of whole chain electron transport activity was 140 nM for Δsll1252ins and 300 nM for wild-type, confirming the site of action of Sll1252. Moreover, the elevated level of the reduced-PQ pool in Δsll1252ins supports that Sll1252 functions between the PQ pool and Cyt b6/f. Interestingly, we noticed that Δsll1252ins reverted to wild-type phenotype by insertion of natural transposon, ISY523, at the disruption site. Δsll1252-Ntrn, expressing only the C-terminal region of Sll1252, exhibited a slow-growth phenotype and disorganized thylakoid structure compared to wild-type and Δsll1252-Ctrn (expressing only the N-terminal region). Collectively, our data suggest that Sll1252 regulates electron transfer between the PQ pool and the Cyt b6/f complex in the linear photosynthetic electron transport chain via coordinated function of both the N- and C-terminal regions of Sll1252. Full article
(This article belongs to the Special Issue Genomics of Cyanobacterial Adaptability and Diversity)
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12 pages, 3612 KiB  
Article
Systematic Large Fragment Deletions in the Genome of Synechococcus elongatus and the Consequent Changes in Transcriptomic Profiles
by Feifei Hou, Zhufang Ke, Yi Xu, Yali Wang, Geqian Zhu, Hong Gao, Shuiling Ji and Xudong Xu
Genes 2023, 14(5), 1091; https://doi.org/10.3390/genes14051091 - 16 May 2023
Cited by 1 | Viewed by 1499
Abstract
Genome streamlining, as a natural process in the evolution of microbes, has become a common approach for generating ideal chassis cells for synthetic biology studies and industrial applications. However, systematic genome reduction remains a bottleneck in the generation of such chassis cells with [...] Read more.
Genome streamlining, as a natural process in the evolution of microbes, has become a common approach for generating ideal chassis cells for synthetic biology studies and industrial applications. However, systematic genome reduction remains a bottleneck in the generation of such chassis cells with cyanobacteria, due to very time-consuming genetic manipulations. Synechococcus elongatus PCC 7942, a unicellular cyanobacterium, is a candidate for systematic genome reduction, as its essential and nonessential genes have been experimentally identified. Here, we report that at least 20 of the 23 over 10 kb nonessential gene regions could be deleted and that stepwise deletions of these regions could be achieved. A septuple-deletion mutant (genome reduced by 3.8%) was generated, and the effects of genome reduction on the growth and genome-wide transcription were investigated. In the ancestral triple to sextuple mutants (b, c, d, e1), an increasingly large number of genes (up to 998) were upregulated relative to the wild type, while slightly fewer genes (831) were upregulated in the septuple mutant (f). In a different sextuple mutant (e2) derived from the quintuple mutant d, much fewer genes (232) were upregulated. Under the standard conditions in this study, the mutant e2 showed a higher growth rate than the wild type, e1 and f. Our results indicate that it is feasible to extensively reduce the genomes of cyanobacteria for generation of chassis cells and for experimental evolutionary studies. Full article
(This article belongs to the Special Issue Genomics of Cyanobacterial Adaptability and Diversity)
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