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Kiyokawa K, Yamamoto S, Moriguchi K, Sugiyama M, Hisatomi T, Suzuki K. Construction of versatile yeast plasmid vectors transferable by Agrobacterium-mediated transformation and their application to bread-making yeast strains. J Biosci Bioeng 2023; 136:142-151. [PMID: 37263830 DOI: 10.1016/j.jbiosc.2023.04.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 04/23/2023] [Accepted: 04/24/2023] [Indexed: 06/03/2023]
Abstract
Agrobacterium-mediated transformation (AMT) potentially has great advantages over other DNA introduction methods: e.g., long DNA and numerous recipient strains can be dealt with at a time merely by co-cultivation with donor Agrobacterium cells. However, AMT was applied only to several laboratory yeast strains, and has never been considered as a standard gene-introduction method for yeast species. To disseminate the AMT method in yeast species, it is necessary to develop versatile AMT plasmid vectors including shuttle type ones, which have been unavailable yet for yeasts. In this study, we constructed a series of AMT plasmid vectors that consist of replicative (shuttle)- and integrative-types and harbor a gene conferring resistance to either G418 or aureobasidin A for application to prototrophic yeast strains. The vectors were successfully applied to five industrial yeast strains belonging to Saccharomyces cerevisiae after a modification of a previous AMT protocol, i.e., simply inputting a smaller number of yeast cells to the co-cultivation than that in the previous protocol. The revised protocol enabled all five yeast strains to generate recombinant colonies not only at high efficiency using replicative-type vectors, but also readily at an efficiency around 10-5 using integrative one. Further modification of the protocol demonstrated AMT for multiple yeast strains at a time with less labor. Therefore, AMT would facilitate molecular genetic approaches to many yeast strains in basic and applied sciences.
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Affiliation(s)
- Kazuya Kiyokawa
- Basic Biology Program, Graduate School of Integrated Sciences for Life, Higashi- Hiroshima, Hiroshima 739-8526, Japan; Department of Biological Science, Graduate School of Science, Hiroshima University, Higashi- Hiroshima, Hiroshima 739-8526, Japan.
| | - Shinji Yamamoto
- Department of Biological Science, Graduate School of Science, Hiroshima University, Higashi- Hiroshima, Hiroshima 739-8526, Japan.
| | - Kazuki Moriguchi
- Basic Biology Program, Graduate School of Integrated Sciences for Life, Higashi- Hiroshima, Hiroshima 739-8526, Japan; Department of Biological Science, Graduate School of Science, Hiroshima University, Higashi- Hiroshima, Hiroshima 739-8526, Japan.
| | - Minetaka Sugiyama
- Department of Food Sciences and Biotechnology, Faculty of Life Sciences, Hiroshima Institute of Technology, Hiroshima City, Hiroshima 731-519, Japan.
| | - Taisuke Hisatomi
- Department of Biotechnology, Faculty of Life Sciences and Biotechnology, Fukuyama University, Fukuyama, Hiroshima 729-0292, Japan.
| | - Katsunori Suzuki
- Basic Biology Program, Graduate School of Integrated Sciences for Life, Higashi- Hiroshima, Hiroshima 739-8526, Japan; Department of Biological Science, Graduate School of Science, Hiroshima University, Higashi- Hiroshima, Hiroshima 739-8526, Japan.
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Zoolkefli FIRM, Moriguchi K, Cho Y, Kiyokawa K, Yamamoto S, Suzuki K. Isolation and Analysis of Donor Chromosomal Genes Whose Deficiency Is Responsible for Accelerating Bacterial and Trans-Kingdom Conjugations by IncP1 T4SS Machinery. Front Microbiol 2021; 12:620535. [PMID: 34093458 PMCID: PMC8174662 DOI: 10.3389/fmicb.2021.620535] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Accepted: 04/06/2021] [Indexed: 11/13/2022] Open
Abstract
Conjugal transfer is a major driving force of genetic exchange in eubacteria, and the system in IncP1-type broad-host-range plasmids transfers DNA even to eukaryotes and archaea in a process known as trans-kingdom conjugation (TKC). Although conjugation factors encoded on plasmids have been extensively analyzed, those on the donor chromosome have not. To identify the potential conjugation factor(s), a genome-wide survey on a comprehensive collection of Escherichia coli gene knockout mutants (Keio collection) as donors to Saccharomyces cerevisiae recipients was performed using a conjugal transfer system mediated by the type IV secretion system (T4SS) of the IncP1α plasmid. Out of 3,884 mutants, three mutants (ΔfrmR, ΔsufA, and ΔiscA) were isolated, which showed an increase by one order of magnitude in both E. coli-E. coli and E. coli-yeast conjugations without an increase in the mRNA accumulation level for the conjugation related genes examined. The double-knockout mutants for these genes (ΔfrmRΔsufA and ΔiscAΔfrmR) did not show synergistic effects on the conjugation efficiency, suggesting that these factors affect a common step in the conjugation machinery. The three mutants demonstrated increased conjugation efficiency in IncP1β-type but not in IncN- and IncW-type broad-host-range plasmid transfers, and the homologous gene knockout mutants against the three genes in Agrobacterium tumefaciens also showed increased TKC efficiency. These results suggest the existence of a specific regulatory system in IncP1 plasmids that enables the control of conjugation efficiency in different hosts, which could be utilized for the development of donor strains as gene introduction tools into bacteria, eukaryotes, and archaea.
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Affiliation(s)
| | - Kazuki Moriguchi
- Department of Biological Science, Graduate School of Science, Hiroshima University, Higashihiroshima, Japan.,Program of Basic Biology, Graduate School of Integrated Sciences for Life, Hiroshima University, Higashihiroshima, Japan
| | - Yunjae Cho
- Department of Biological Science, Faculty of Science, Hiroshima University, Higashihiroshima, Japan
| | - Kazuya Kiyokawa
- Program of Basic Biology, Graduate School of Integrated Sciences for Life, Hiroshima University, Higashihiroshima, Japan
| | - Shinji Yamamoto
- Department of Biological Science, Graduate School of Science, Hiroshima University, Higashihiroshima, Japan
| | - Katsunori Suzuki
- Department of Biological Science, Graduate School of Science, Hiroshima University, Higashihiroshima, Japan.,Program of Basic Biology, Graduate School of Integrated Sciences for Life, Hiroshima University, Higashihiroshima, Japan
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