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Struck B, Wiersma SJ, Ortseifen V, Pühler A, Niehaus K. Comprehensive Proteome Profiling of a Xanthomonas campestris pv. Campestris B100 Culture Grown in Minimal Medium with a Specific Focus on Nutrient Consumption and Xanthan Biosynthesis. Proteomes 2024; 12:12. [PMID: 38651371 PMCID: PMC11036225 DOI: 10.3390/proteomes12020012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2024] [Revised: 03/22/2024] [Accepted: 03/28/2024] [Indexed: 04/25/2024] Open
Abstract
Xanthan, a bacterial polysaccharide, is widespread in industrial applications, particularly as a food additive. However, little is known about the process of xanthan synthesis on the proteome level, even though Xanthomonas campestris is frequently used for xanthan fermentation. A label-free LC-MS/MS method was employed to study the protein changes during xanthan fermentation in minimal medium. According to the reference database, 2416 proteins were identified, representing 54.75 % of the proteome. The study examined changes in protein abundances concerning the growth phase and xanthan productivity. Throughout the experiment, changes in nitrate concentration appeared to affect the abundance of most proteins involved in nitrogen metabolism, except Gdh and GlnA. Proteins involved in sugar nucleotide metabolism stay unchanged across all growth phases. Apart from GumD, GumB, and GumC, the gum proteins showed no significant changes throughout the experiment. GumD, the first enzyme in the assembly of the xanthan-repeating unit, peaked during the early stationary phase but decreased during the late stationary phase. GumB and GumC, which are involved in exporting xanthan, increased significantly during the stationary phase. This study suggests that a potential bottleneck for xanthan productivity does not reside in the abundance of proteins directly involved in the synthesis pathways.
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Affiliation(s)
- Ben Struck
- Department of Biology, Bielefeld University, Universitätsstraße 25, D-33615 Bielefeld, Germany (S.J.W.)
- Center for Biotechnology (CeBiTec), Bielefeld University, Universitätsstraße 27, D-33615 Bielefeld, Germany;
| | - Sanne Jitske Wiersma
- Department of Biology, Bielefeld University, Universitätsstraße 25, D-33615 Bielefeld, Germany (S.J.W.)
- Center for Biotechnology (CeBiTec), Bielefeld University, Universitätsstraße 27, D-33615 Bielefeld, Germany;
| | - Vera Ortseifen
- Department of Biology, Bielefeld University, Universitätsstraße 25, D-33615 Bielefeld, Germany (S.J.W.)
- Center for Biotechnology (CeBiTec), Bielefeld University, Universitätsstraße 27, D-33615 Bielefeld, Germany;
| | - Alfred Pühler
- Center for Biotechnology (CeBiTec), Bielefeld University, Universitätsstraße 27, D-33615 Bielefeld, Germany;
| | - Karsten Niehaus
- Department of Biology, Bielefeld University, Universitätsstraße 25, D-33615 Bielefeld, Germany (S.J.W.)
- Center for Biotechnology (CeBiTec), Bielefeld University, Universitätsstraße 27, D-33615 Bielefeld, Germany;
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Hahn J, Koch D, Niehaus K, Ortseifen V. Analysis of Gum proteins involved in xanthan biosynthesis throughout multiple cell fractions in a "single-tube". J Proteomics 2022; 257:104513. [PMID: 35149254 DOI: 10.1016/j.jprot.2022.104513] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 01/25/2022] [Accepted: 01/31/2022] [Indexed: 10/19/2022]
Abstract
Xanthomonas is a phytopathogenic bacterium and of industrial interest due to its capability to produce xanthan, used as a thickener and emulsifier in the food and non-food industry. Until now, proteome analyses of Xcc lacking a detailed view on the proteins involved in xanthan biosynthesis. The proteins involved in the biosynthesis of this polysaccharide are located near, in or at the cell membrane. This study aims to establish a robust and rapid protocol for a comprehensive proteome analysis of Xcc strains, without the need to isolate different cell fractions. Therefore, a method for the analysis of the whole cell proteome was compared to the isolation of specific fractions regarding the total number of identified proteins, the overlap, and the differences between the approaches. The whole cell proteome analysis with extended peptide separation methods resulted in more than 3254 identified proteins covering 73.1% of the whole proteome. The protocol was used to study xanthan production in a label-free quantification approach. Expression profiles of 8 Gum proteins were compared between the stationary and logarithmic growth phase. Differential expression levels within the operon structure indicate a complex regulatory mechanism for xanthan biosynthesis. Data are available via ProteomeXchange with identifier PXD027261. SIGNIFICANCE: Bacteria are metabolite factories with a wide variety of natural products. Thus, proteome analyses play a crucial role to understand the biological processes within a cell behind the biosynthesis of those metabolites. Proteins involved in the biosynthesis of secreted products are often organised on, in or around the membrane allowing metabolite channelling. Experiments targeting those biosynthesis pathways on protein level often require the analysis of multiple cell fractions like cytosolic, inner, and outer membrane. This is time consuming and demands different protocols. The protocol presented here is a rapid and robust solution to study biosynthetic pathways of biological or biotechnological interest in a single approach on protein level, where gene products are partitioned across multiple cell fractions. The use of a single method also simplifies the comparison of different experiments, for example, production vs. nonproduction conditions.
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Affiliation(s)
- Julia Hahn
- Proteome- and Metabolome Research, Faculty of Biology, Center for Biotechnology, Bielefeld University, Universitätsstraße 27, 33615 Bielefeld, Germany
| | - Daniel Koch
- Jungbunzlauer Austria AG, Pernhofen 1, 2064 Wulzeshofen, Austria
| | - Karsten Niehaus
- Proteome- and Metabolome Research, Faculty of Biology, Center for Biotechnology, Bielefeld University, Universitätsstraße 27, 33615 Bielefeld, Germany
| | - Vera Ortseifen
- Proteome- and Metabolome Research, Faculty of Biology, Center for Biotechnology, Bielefeld University, Universitätsstraße 27, 33615 Bielefeld, Germany.
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Schulte F, Leßmeier L, Voss J, Ortseifen V, Vorhölter FJ, Niehaus K. Regulatory associations between the metabolism of sulfur-containing amino acids and xanthan biosynthesis in Xanthomonas campestris pv. campestris B100. FEMS Microbiol Lett 2019; 366:5289864. [PMID: 30649298 DOI: 10.1093/femsle/fnz005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Accepted: 01/14/2019] [Indexed: 02/06/2023] Open
Abstract
The γ-proteobacterium Xanthomonas campestris pv. campestris (Xcc) B100 synthesizes the exopolysaccharide xanthan, a commercially relevant thickening agent produced commonly by industrial scale fermentation. This work was inspired by the observation that methionine is an inhibitor of xanthan formation in growth experiments. Therefore, the global effects of methionine supplementation were characterized through cultivation experiments, genome-wide microarray hybridizations and qRT-PCR. Specific pull down of DNA-binding proteins by using the intergenic regions upstream of xanA, gumB and gumD led to the identification of six transcriptional regulators, among them the LysR-family transcriptional regulator CysB. An insertion mutant of this gene was analyzed by growth experiments, microarray experiments and qRT-PCR. Based on our experimental data, we developed a model that describes the methionine-dependent co-regulation of xanthan and sulfur-containing compounds in Xanthomonas. These data substantially contribute to better understand the impact of methionine as a compound in xanthan production media used in industrial fermentations.
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Affiliation(s)
- Fabian Schulte
- Department of Proteome and Metabolome Research - Bio27, Faculty of Biology, Centrum für Biotechnologie, Universität Bielefeld, Universitätsstr. 25, 33615 Bielefeld, Germany
| | - Lennart Leßmeier
- Chair of Genetics of Prokaryotes, Faculty of Biology, Centrum für Biotechnologie, Universität Bielefeld, Universitätsstr. 25, 33615 Bielefeld, Germany
| | - Julia Voss
- Department of Proteome and Metabolome Research - Bio27, Faculty of Biology, Centrum für Biotechnologie, Universität Bielefeld, Universitätsstr. 25, 33615 Bielefeld, Germany
| | - Vera Ortseifen
- Department of Proteome and Metabolome Research - Bio27, Faculty of Biology, Centrum für Biotechnologie, Universität Bielefeld, Universitätsstr. 25, 33615 Bielefeld, Germany
| | - Frank-Jörg Vorhölter
- Department of Proteome and Metabolome Research - Bio27, Faculty of Biology, Centrum für Biotechnologie, Universität Bielefeld, Universitätsstr. 25, 33615 Bielefeld, Germany
| | - Karsten Niehaus
- Department of Proteome and Metabolome Research - Bio27, Faculty of Biology, Centrum für Biotechnologie, Universität Bielefeld, Universitätsstr. 25, 33615 Bielefeld, Germany
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Santos LS, Maximiano MR, Megias E, Pappas M, Ribeiro SG, Mehta A. Quantitative expression of microRNAs in Brassica oleracea infected with Xanthomonas campestris pv. campestris. Mol Biol Rep 2019; 46:3523-3529. [PMID: 30945070 DOI: 10.1007/s11033-019-04779-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Accepted: 03/21/2019] [Indexed: 12/19/2022]
Abstract
Brassica oleracea var. capitata (cabbage) is an economically important crop affected by black rot disease caused by Xanthomonas campestris pv. campestris (Xcc). MicroRNAs (miRNAs) play an important role in plant defense modulation and therefore the analysis of these molecules can help better understand plant-pathogen interactions. In this study, we report the differential expression of four miRNAs that seem to participate in the plant response to Xcc infection. Northern Blot and RT-qPCR techniques were used to measure miRNA expression in resistant (União) and susceptible (Kenzan) cultivars. From 6 miRNAs analyzed, 4 were detected and differentially expressed, showing a down- and upregulated expression profile in susceptible and resistant cultivars, respectively. These results suggest that miR156, miR167, miR169, and miR390 could play a role in B. oleracea resistance enhancement against Xcc and could be explored as potential resistance markers in B. oleracea-Xcc interaction.
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Affiliation(s)
- Lucas Souza Santos
- Embrapa Recursos Genéticos e Biotecnologia, Parque Estação Biológica, PqEB, Av. W5, Norte (final), Brasília, DF, CEP 70770-917, Brazil
- Centro Universitário do Distrito Federal, SEP/SUL EQ 704/904 Conj.A, Brasília, DF, CEP 70390-045, Brazil
| | - Mariana Rocha Maximiano
- Embrapa Recursos Genéticos e Biotecnologia, Parque Estação Biológica, PqEB, Av. W5, Norte (final), Brasília, DF, CEP 70770-917, Brazil
- Universidade Federal de Juiz de Fora, Rua José Lourenço Kelmer, s/n - Campus Universitário, Bairro São Pedro, Juiz de Fora, MG, CEP 36036-900, Brazil
| | - Esaú Megias
- Embrapa Recursos Genéticos e Biotecnologia, Parque Estação Biológica, PqEB, Av. W5, Norte (final), Brasília, DF, CEP 70770-917, Brazil
- Universidad de Cádiz, Calle Ancha, 16, 11001, Cádiz, Spain
| | - Marília Pappas
- Embrapa Recursos Genéticos e Biotecnologia, Parque Estação Biológica, PqEB, Av. W5, Norte (final), Brasília, DF, CEP 70770-917, Brazil
| | - Simone Graça Ribeiro
- Embrapa Recursos Genéticos e Biotecnologia, Parque Estação Biológica, PqEB, Av. W5, Norte (final), Brasília, DF, CEP 70770-917, Brazil
| | - Angela Mehta
- Embrapa Recursos Genéticos e Biotecnologia, Parque Estação Biológica, PqEB, Av. W5, Norte (final), Brasília, DF, CEP 70770-917, Brazil.
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Alkhateeb RS, Vorhölter FJ, Steffens T, Rückert C, Ortseifen V, Hublik G, Niehaus K, Pühler A. Comparative transcription profiling of two fermentation cultures of Xanthomonas campestris pv. campestris B100 sampled in the growth and in the stationary phase. Appl Microbiol Biotechnol 2018; 102:6613-6625. [DOI: 10.1007/s00253-018-9106-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 05/07/2018] [Accepted: 05/08/2018] [Indexed: 10/14/2022]
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Buss M, Geerds C, Patschkowski T, Niehaus K, Niemann HH. Perfect merohedral twinning combined with noncrystallographic symmetry potentially causes the failure of molecular replacement with low-homology search models for the flavin-dependent halogenase HalX from Xanthomonas campestris. Acta Crystallogr F Struct Biol Commun 2018; 74:345-350. [PMID: 29870018 PMCID: PMC5987742 DOI: 10.1107/s2053230x18006933] [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: 02/27/2018] [Accepted: 05/06/2018] [Indexed: 03/27/2024] Open
Abstract
Flavin-dependent halogenases can be used as biocatalysts because they regioselectively halogenate their substrates under mild reaction conditions. New halogenases with novel substrate specificities will add to the toolbox of enzymes available to organic chemists. HalX, the product of the xcc-b100_4193 gene, is a putative flavin-dependent halogenase from Xanthomonas campestris. The enzyme was recombinantly expressed and crystallized in order to aid in identifying its hitherto unknown substrate. Native data collected to a resolution of 2.5 Å showed indications of merohedral twinning in a hexagonal lattice. Attempts to solve the phase problem by molecular replacement failed. Here, a detailed analysis of the suspected twinning is presented. It is most likely that the crystals are trigonal (point group 3) and exhibit perfect hemihedral twinning so that they appear to be hexagonal (point group 6). As there are several molecules in the asymmetric unit, noncrystallographic symmetry may complicate twinning analysis and structure determination.
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Affiliation(s)
- Maren Buss
- Department of Chemistry, Bielefeld University, Universitätsstrasse 25, 33615 Bielefeld, Germany
| | - Christina Geerds
- Department of Chemistry, Bielefeld University, Universitätsstrasse 25, 33615 Bielefeld, Germany
| | - Thomas Patschkowski
- Faculty of Biology, Proteome and Metabolome Research, Bielefeld University, Universitätsstrasse 25, 33615 Bielefeld, Germany
- Centre of Biotechnology (CeBiTec), Bielefeld University, Universitätsstrasse 27, 33615 Bielefeld, Germany
| | - Karsten Niehaus
- Faculty of Biology, Proteome and Metabolome Research, Bielefeld University, Universitätsstrasse 25, 33615 Bielefeld, Germany
- Centre of Biotechnology (CeBiTec), Bielefeld University, Universitätsstrasse 27, 33615 Bielefeld, Germany
| | - Hartmut H. Niemann
- Department of Chemistry, Bielefeld University, Universitätsstrasse 25, 33615 Bielefeld, Germany
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