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Javorova R, Sevcikova B, Rezuchova B, Novakova R, Opaterny F, Csolleiova D, Feckova L, Kormanec J. Multiple SigB homologues govern the transcription of the ssgBp promoter in the sporulation-specific ssgB gene in Streptomyces coelicolor A3(2). Res Microbiol 2024; 175:104201. [PMID: 38522628 DOI: 10.1016/j.resmic.2024.104201] [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: 10/12/2023] [Revised: 03/15/2024] [Accepted: 03/18/2024] [Indexed: 03/26/2024]
Abstract
Unlike Bacillus subtilis, Streptomyces coelicolor contains nine SigB homologues of the stress-response sigma factor SigB. By using a two-plasmid system, we previously identified promoters recognized by these sigma factors. Almost all promoters were recognized by several SigB homologues. However, no specific sequences of these promoters were found. One of these promoters, ssgBp, was selected to examine this cross-recognition in the native host. It controls the expression of the sporulation-specific gene ssgB. Using a luciferase reporter, the activity of this promoter in S. coelicolor and nine mutant strains lacking individual sigB homologous genes showed that sgBp is dependent on three sigma factors, SigH, SigN, and SigI. To determine which nucleotides in the-10 region are responsible for the selection of a specific SigB homologue, promoters mutated at the last three nucleotide positions were tested in the two-plasmid system. Some mutant promoters were specifically recognized by a distinct set of SigB homologues. Analysis of these mutant promoters in the native host showed the role of these nucleotides. A conserved nucleotide A at position 5 was essential for promoter activity, and two variable nucleotides at positions 4 and 6 were responsible for the partial selectivity of promoter recognition by SigB homologues.
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Affiliation(s)
- Rachel Javorova
- Institute of Molecular Biology, Slovak Academy of Sciences, 845 51 Bratislava, Slovak Republic.
| | - Beatrica Sevcikova
- Institute of Molecular Biology, Slovak Academy of Sciences, 845 51 Bratislava, Slovak Republic.
| | - Bronislava Rezuchova
- Institute of Molecular Biology, Slovak Academy of Sciences, 845 51 Bratislava, Slovak Republic.
| | - Renata Novakova
- Institute of Molecular Biology, Slovak Academy of Sciences, 845 51 Bratislava, Slovak Republic.
| | - Filip Opaterny
- Institute of Molecular Biology, Slovak Academy of Sciences, 845 51 Bratislava, Slovak Republic.
| | - Dominika Csolleiova
- Institute of Molecular Biology, Slovak Academy of Sciences, 845 51 Bratislava, Slovak Republic.
| | - Lubomira Feckova
- Institute of Molecular Biology, Slovak Academy of Sciences, 845 51 Bratislava, Slovak Republic.
| | - Jan Kormanec
- Institute of Molecular Biology, Slovak Academy of Sciences, 845 51 Bratislava, Slovak Republic.
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3
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Nyongesa S, Weber PM, Bernet È, Pulido F, Nieves C, Nieckarz M, Delaby M, Viehboeck T, Krause N, Rivera-Millot A, Nakamura A, Vischer NOE, vanNieuwenhze M, Brun YV, Cava F, Bulgheresi S, Veyrier FJ. Evolution of longitudinal division in multicellular bacteria of the Neisseriaceae family. Nat Commun 2022; 13:4853. [PMID: 35995772 PMCID: PMC9395523 DOI: 10.1038/s41467-022-32260-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Accepted: 07/25/2022] [Indexed: 11/16/2022] Open
Abstract
Rod-shaped bacteria typically elongate and divide by transverse fission. However, several bacterial species can form rod-shaped cells that divide longitudinally. Here, we study the evolution of cell shape and division mode within the family Neisseriaceae, which includes Gram-negative coccoid and rod-shaped species. In particular, bacteria of the genera Alysiella, Simonsiella and Conchiformibius, which can be found in the oral cavity of mammals, are multicellular and divide longitudinally. We use comparative genomics and ultrastructural microscopy to infer that longitudinal division within Neisseriaceae evolved from a rod-shaped ancestor. In multicellular longitudinally-dividing species, neighbouring cells within multicellular filaments are attached by their lateral peptidoglycan. In these bacteria, peptidoglycan insertion does not appear concentric, i.e. from the cell periphery to its centre, but as a medial sheet guillotining each cell. Finally, we identify genes and alleles associated with multicellularity and longitudinal division, including the acquisition of amidase-encoding gene amiC2, and amino acid changes in proteins including MreB and FtsA. Introduction of amiC2 and allelic substitution of mreB in a rod-shaped species that divides by transverse fission results in shorter cells with longer septa. Our work sheds light on the evolution of multicellularity and longitudinal division in bacteria, and suggests that members of the Neisseriaceae family may be good models to study these processes due to their morphological plasticity and genetic tractability. Rod-shaped bacteria typically elongate and divide by transverse fission, but a few species are known to divide longitudinally. Here, the authors use genomic, phylogenetic and microscopy techniques to shed light on the evolution of cell shape, multicellularity and division mode within the family Neisseriaceae.
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Affiliation(s)
- Sammy Nyongesa
- INRS-Centre Armand-Frappier Santé Biotechnologie, Bacterial Symbionts Evolution, Laval, QC, H7V 1B7, Canada
| | - Philipp M Weber
- Department of Functional and Evolutionary Ecology, Environmental Cell Biology Group, University of Vienna, Vienna, Djerassiplatz 1, 1030, Vienna, Austria.,University of Vienna, Vienna Doctoral School of Ecology and Evolution, Vienna, Austria
| | - Ève Bernet
- INRS-Centre Armand-Frappier Santé Biotechnologie, Bacterial Symbionts Evolution, Laval, QC, H7V 1B7, Canada
| | - Francisco Pulido
- INRS-Centre Armand-Frappier Santé Biotechnologie, Bacterial Symbionts Evolution, Laval, QC, H7V 1B7, Canada
| | - Cecilia Nieves
- INRS-Centre Armand-Frappier Santé Biotechnologie, Bacterial Symbionts Evolution, Laval, QC, H7V 1B7, Canada
| | - Marta Nieckarz
- Department of Molecular Biology and Laboratory for Molecular Infection Medicine Sweden (MIMS), Umeå Centre for Microbial Research (UCMR), Umeå University, Umeå, SE-90187, Sweden
| | - Marie Delaby
- Département de microbiologie, infectiologie et immunologie, Université de Montréal, Montréal, QC, Canada
| | - Tobias Viehboeck
- Department of Functional and Evolutionary Ecology, Environmental Cell Biology Group, University of Vienna, Vienna, Djerassiplatz 1, 1030, Vienna, Austria.,University of Vienna, Vienna Doctoral School of Ecology and Evolution, Vienna, Austria.,Division of Microbial Ecology, Center for Microbiology and Environmental Systems Science, , University of Vienna, Djerassiplatz 1, 1030, Vienna, Austria
| | - Nicole Krause
- Department of Functional and Evolutionary Ecology, Environmental Cell Biology Group, University of Vienna, Vienna, Djerassiplatz 1, 1030, Vienna, Austria.,University of Vienna, Vienna Doctoral School of Ecology and Evolution, Vienna, Austria
| | - Alex Rivera-Millot
- INRS-Centre Armand-Frappier Santé Biotechnologie, Bacterial Symbionts Evolution, Laval, QC, H7V 1B7, Canada
| | - Arnaldo Nakamura
- INRS-Centre Armand-Frappier Santé Biotechnologie, Bacterial Symbionts Evolution, Laval, QC, H7V 1B7, Canada
| | - Norbert O E Vischer
- Bacterial Cell Biology & Physiology, Swammerdam Institute of Life Sciences, Faculty of Science, University of Amsterdam, Science Park 904, 1098, Amsterdam, the Netherlands
| | | | - Yves V Brun
- Département de microbiologie, infectiologie et immunologie, Université de Montréal, Montréal, QC, Canada
| | - Felipe Cava
- Department of Molecular Biology and Laboratory for Molecular Infection Medicine Sweden (MIMS), Umeå Centre for Microbial Research (UCMR), Umeå University, Umeå, SE-90187, Sweden
| | - Silvia Bulgheresi
- Department of Functional and Evolutionary Ecology, Environmental Cell Biology Group, University of Vienna, Vienna, Djerassiplatz 1, 1030, Vienna, Austria.
| | - Frédéric J Veyrier
- INRS-Centre Armand-Frappier Santé Biotechnologie, Bacterial Symbionts Evolution, Laval, QC, H7V 1B7, Canada.
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4
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Zhu Y, Wang X, Zhang J, Ni X, Zhang X, Tao M, Pang X. The regulatory gene wblA is a target of the orphan response regulator OrrA in Streptomyces coelicolor. Environ Microbiol 2022; 24:3081-3096. [PMID: 35384219 DOI: 10.1111/1462-2920.15992] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Revised: 03/28/2022] [Accepted: 03/30/2022] [Indexed: 11/30/2022]
Abstract
Our previous study using transposon mutagenesis indicated that disruption of the putative response regulator gene orrA impacted antibiotic production in Streptomyces coelicolor. In this study, the role of OrrA was further characterized by comparing the phenotypes and transcriptomic profiles of the wild-type S. coelicolor strain M145 and ΔorrA, a strain with an inactivated orrA gene. Chromatin immunoprecipitation using a strain expressing OrrA fused with FLAG showed that OrrA binds the promoter of wblA, whose expression was downregulated in ΔorrA. The interaction of OrrA with the wblA promoter was further validated by a pull-down assay. Similar to ΔorrA, the deletion mutant of wblA (ΔwblA) was defective in development, and developmental genes were expressed at similar levels in ΔorrA and ΔwblA. Although both OrrA and WblA downregulated actinorhodin and undecylprodigiosin, their roles in regulation of the calcium-dependent antibiotic and yellow-pigmented type I polyketide differed. sco1375, a gene of unknown function, was identified as another OrrA target, and overexpression of either sco1375 or wblA in ΔorrA partially restored the wild-type phenotype, indicating that these genes mediate some of the effects of OrrA. This study revealed targets of OrrA and provided more insights into the role of the orphan response regulator OrrA in Streptomyces. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Yanping Zhu
- The State Key Laboratory of Microbial Technology, Shandong University, Qingdao, 266237, China.,Colleage of Life Sciences, Qingdao University, Qingdao, 266071, China
| | - Xinyuan Wang
- The State Key Laboratory of Microbial Technology, Shandong University, Qingdao, 266237, China
| | - Jing Zhang
- The State Key Laboratory of Microbial Technology, Shandong University, Qingdao, 266237, China
| | - Xue Ni
- The State Key Laboratory of Microbial Technology, Shandong University, Qingdao, 266237, China
| | - Xia Zhang
- Qingdao Vland Biotech Group Inc, Qingdao, 266000, China
| | - Meifeng Tao
- The State Key Laboratory of Microbial Metabolism, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Xiuhua Pang
- The State Key Laboratory of Microbial Technology, Shandong University, Qingdao, 266237, China
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5
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Hyphal compartmentalization and sporulation in Streptomyces require the conserved cell division protein SepX. Nat Commun 2022; 13:71. [PMID: 35013186 PMCID: PMC8748795 DOI: 10.1038/s41467-021-27638-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Accepted: 11/03/2021] [Indexed: 11/25/2022] Open
Abstract
Filamentous actinobacteria such as Streptomyces undergo two distinct modes of cell division, leading to partitioning of growing hyphae into multicellular compartments via cross-walls, and to septation and release of unicellular spores. Specific determinants for cross-wall formation and the importance of hyphal compartmentalization for Streptomyces development are largely unknown. Here we show that SepX, an actinobacterial-specific protein, is crucial for both cell division modes in Streptomyces venezuelae. Importantly, we find that sepX-deficient mutants grow without cross-walls and that this substantially impairs the fitness of colonies and the coordinated progression through the developmental life cycle. Protein interaction studies and live-cell imaging suggest that SepX contributes to the stabilization of the divisome, a mechanism that also requires the dynamin-like protein DynB. Thus, our work identifies an important determinant for cell division in Streptomyces that is required for cellular development and sporulation. Streptomyces bacteria undergo two modes of cell division: formation of cross-walls in hyphae, leading to multicellular compartments, and septation for release of unicellular spores. Here, Bush et al. identify a protein that is important for both cell division modes in Streptomyces, likely by contributing to stabilization of the divisome.
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