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Sood U, Müller M, Lan T, Garg G, Singhvi N, Hira P, Singh P, Nigam A, Verma M, Lata P, Kaur H, Kumar A, Rawat CD, Lal S, Aldrich C, Bechthold A, Lal R. Amycolatopsis mediterranei: A Sixty-Year Journey from Strain Isolation to Unlocking Its Potential of Rifamycin Analogue Production by Combinatorial Biosynthesis. JOURNAL OF NATURAL PRODUCTS 2024; 87:424-438. [PMID: 38289177 DOI: 10.1021/acs.jnatprod.3c00686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/24/2024]
Abstract
Ever since the isolation of Amycolatopsis mediterranei in 1957, this strain has been the focus of research worldwide. In the last 60 years or more, our understanding of the taxonomy, development of cloning vectors and conjugation system, physiology, genetics, genomics, and biosynthetic pathway of rifamycin B production in A. mediterranei has substantially increased. In particular, the development of cloning vectors, transformation system, characterization of the rifamycin biosynthetic gene cluster, and the regulation of rifamycin B production by the pioneering work of Heinz Floss have made the rifamycin polyketide biosynthetic gene cluster (PKS) an attractive target for extensive genetic manipulations to produce rifamycin B analogues which could be effective against multi-drug-resistant tuberculosis. Additionally, a better understanding of the regulation of rifamycin B production and the application of newer genomics tools, including CRISPR-assisted genome editing systems, might prove useful to overcome the limitations associated with low production of rifamycin analogues.
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Affiliation(s)
- Utkarsh Sood
- Department of Zoology, Kirori Mal College, University of Delhi, Delhi-110007, India
| | - Moritz Müller
- Institute of Pharmaceutical Biology and Biotechnology, Albert-Ludwigs-Universität, Stefan-Meier-Straße 19, 79104, Freiburg, Germany
| | - Tian Lan
- Department of Medicinal Chemistry, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Gauri Garg
- Department of Zoology, Kirori Mal College, University of Delhi, Delhi-110007, India
| | - Nirjara Singhvi
- School of Allied Sciences, Dev Bhoomi Uttarakhand University, Dehradun, Uttarakhand 248007, India
| | - Princy Hira
- Department of Zoology, Maitreyi College, University of Delhi, Delhi-110003, India
| | - Priya Singh
- Department of Zoology, Maitreyi College, University of Delhi, Delhi-110003, India
| | - Aeshna Nigam
- Department of Zoology, Shivaji College, University of Delhi, Delhi-110027, India
| | - Mansi Verma
- Department of Zoology, Hansraj College, University of Delhi, Delhi-110007, India
| | - Pushp Lata
- Department of Zoology, University of Delhi, Delhi-110007, India
| | - Hardeep Kaur
- Department of Zoology, Ramjas College, University of Delhi, Delhi-110007, India
| | - Abhilash Kumar
- Department of Zoology, Ramjas College, University of Delhi, Delhi-110007, India
| | - Charu Dogra Rawat
- Department of Zoology, Ramjas College, University of Delhi, Delhi-110007, India
| | - Sukanya Lal
- PhiXGen Private Limited, Gurugram, Haryana-122001, India
| | - Courtney Aldrich
- Department of Medicinal Chemistry, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Andreas Bechthold
- Institute of Pharmaceutical Biology and Biotechnology, Albert-Ludwigs-Universität, Stefan-Meier-Straße 19, 79104, Freiburg, Germany
| | - Rup Lal
- PhiXGen Private Limited, Gurugram, Haryana-122001, India
- Acharya Narendra Dev College, University of Delhi, Delhi-110019, India
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Tyagi I, Tyagi K, Gupta V, Dutta R, Singhvi N, Kumar V, Bhutiani R, Prakash O. Microbial diversity characterizations, associated pathogenesis and antimicrobial resistance profiling of Najafgarh drain. ENVIRONMENTAL RESEARCH 2023; 238:117140. [PMID: 37716389 DOI: 10.1016/j.envres.2023.117140] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 08/30/2023] [Accepted: 09/13/2023] [Indexed: 09/18/2023]
Abstract
The Najafgarh drain plays a significant role in the pollution of the Yamuna River, accounting for 40% of the total pollution. Therefore, it is crucial to investigate and analyze the microbial diversity, metabolic functional capacity, and antibiotic resistance genes (ARGs) present in the Najafgarh drain. Additionally, studying the water quality and its relationship with the proliferation of microorganisms in the drain is of utmost importance. Results obtained confirmed the deteriorated water quality as physico-chemical parameters such as biochemical oxygen demand (BOD), chemical oxygen demand (COD), dissolved oxygen (DO), and total suspended solids (TSS) in the range of 125-140, 400-460, 0-0.2, 25-140.4 mg/l respectively violated the standard permissible national and global standards. In addition, the next generation sequencing (NGS) analysis confirm the presence of genus such as Thauera, Arcobacter, Pseudomonas, Geobacter, Dechloromonas, Tolumonas, Sulfurospirullum, Desulfovibrio, Aeromonas, Bacteroides, Prevotella, Cloacibacterium, Bifidobacterium, Clostridium etc. along with 864 ARGs in the wastewater obtained from the Najafgarh drain. Findings confirm that the pathogenic species reported from this dataset possess severe detrimental impact on faunal and human health. Further, Pearson's r correlation analysis indicated that environmental variables, mainly total dissolved solids (TDS) and chemical oxygen demand (COD), play a pivotal role in driving microbial community structure of this heavily polluted drain. Thus, the poor water quality, presence of a microbial nexus, pathogenic markers, and ARGs throughout this drain confirmed that it would be one potential contributor to the dissemination of disease-causing agents (pathogens) to the household and drinking water supplies in the near future.
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Affiliation(s)
- Inderjeet Tyagi
- Centre for DNA Taxonomy, Molecular Systematics Division, Zoological Survey of India, Kolkata, 700 053, West Bengal, India.
| | - Koamud Tyagi
- Centre for DNA Taxonomy, Molecular Systematics Division, Zoological Survey of India, Kolkata, 700 053, West Bengal, India
| | - Vipin Gupta
- Ministry of Environment Forest and Climate Change, Integrated Regional Office-Dehradun, India, 248001, Uttarakhand, India
| | - Ritesh Dutta
- Kiit School of Biotechnology, Bhubaneswar, 751024, Odisha, India
| | - Nirjara Singhvi
- School of Allied Sciences, Dev Bhoomi Uttarakhand University, Dehradun, 248007, India
| | - Vikas Kumar
- Centre for DNA Taxonomy, Molecular Systematics Division, Zoological Survey of India, Kolkata, 700 053, West Bengal, India.
| | - Rakesh Bhutiani
- Limnology and Ecological Modelling Lab, Department of Zoology and Environmental Science, Gurukul Kangri (Deemed to be University), Haridwar, 249404, UK, India
| | - Om Prakash
- Symbiosis Centre for Climate Change and Sustainability (SCCCS), Symbiosis International (Deemed University), Lavale, Pune, 412115, Maharastra, India
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Tyagi E, Singhvi N, Keshavam CC, Sangwan N, Gupta V, Bhimwal T, Seth R, Seth RK, Singh Y. Phylogenetic analysis and interactomics study unveil gene co-optive evolution of LysR-type transcription regulators across non-pathogenic, opportunistic, and pathogenic mycobacteria. 3 Biotech 2023; 13:168. [PMID: 37188288 PMCID: PMC10167064 DOI: 10.1007/s13205-023-03583-2] [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: 12/01/2022] [Accepted: 04/23/2023] [Indexed: 05/17/2023] Open
Abstract
Mycobacterial species is known for inhabiting various niches ranging from soil to harsh intracellular environment of animal hosts and their survival through constant changes. For survival and persistence, these organisms must quickly adapt by bringing shift in their metabolism. Metabolic shifts are brought by sensing the environmental cues usually by membrane localized sensor molecules. These signals are transmitted to regulators of various metabolic pathways leading to post-translational modifications of regulators ultimately resulting in altered metabolic state of the cell. Multiple regulatory mechanisms have been unearthed so far that play crucial role in adapting to these situations, and among them, the signal-dependent transcriptional regulators mediated responses are integral for the microbes to perceive environmental signals and generate appropriate adaptive responses. LysR-type transcriptional regulators (LTTRs) form the largest family of transcriptional regulators, which are present in all kingdoms of life. Their numbers vary among bacterial genera and even in different mycobacterial species. To understand the evolutionary aspect of pathogenicity based on LTTRs, we performed phylogenetic analysis of LTTRs encoded by several mycobacterial species representing non-pathogenic (NP), opportunistic (OP), and totally pathogenic (TP) mycobacteria. Our results showed that LTTRs of TP clustered separately from LTTRs of NP and OP mycobacteria. In addition, LTTRs frequency per Mb of genome was reduced in TP when compared with NP and OP. Further, the protein-protein interactions and degree-based network analysis showed concomitant increased interactions per LTTRs with increase in pathogenicity. These results suggested the increase in regulon of LTTRs during evolution of TP mycobacteria.
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Affiliation(s)
- Ekta Tyagi
- Department of Zoology, University of Delhi, Delhi, 110007 India
| | - Nirjara Singhvi
- School of Allied Sciences, Dev Bhoomi Uttarakhand University, Dehradun, Uttarakhand 248001 India
| | | | - Nitika Sangwan
- Department of Zoology, University of Delhi, Delhi, 110007 India
| | - Vipin Gupta
- Ministry of Environment Forest & Climate Change, Integrated Regional Office, Dehradun, 248001 India
| | - Tanisha Bhimwal
- Department of Zoology, University of Delhi, Delhi, 110007 India
| | - Ranjana Seth
- Deshbandhu College, University of Delhi South Campus, New Delhi, 110019 India
| | | | - Yogendra Singh
- Department of Zoology, University of Delhi, Delhi, 110007 India
- Present Address: Delhi School of Public Health, Institution of Eminence, University of Delhi, Delhi, 110007 India
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Lv Z, Yin S, Jiang K, Wang W, Luan Y, Wu S, Shi J, Li Z, Ma X, Wang Z, Yan H. The whole-cell proteome shows the characteristics of macrolides-resistant Bordetella pertussis in China linked to the biofilm formation. Arch Microbiol 2023; 205:219. [PMID: 37148370 PMCID: PMC10164027 DOI: 10.1007/s00203-023-03566-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 04/23/2023] [Accepted: 04/24/2023] [Indexed: 05/08/2023]
Abstract
The macrolides-resistant Bordetella pertussis (MR-Bp) isolates in China evolved from the ptxP1/fhaB3 allele and rapidly became predominant, suggestive of an adaptive transmission ability. This was different from the global prevalent ptxP3 strains, in which MR-Bp was rarely reported. The study aimed to determine the underlying mechanism responsible for fitness and resistance in these two strains. We identify proteomic differences between ptxP1/fhaB3 and ptxP3/fhaB1 strains using tandem mass tag (TMT)-based proteomics. We then performed in-depth bioinformatic analysis to determine differentially expressed genes (DEGs), followed by gene ontology (GO), and protein-protein interaction (PPI) network analysis. Further parallel reaction monitoring (PRM) analysis confirmed the expression of four target proteins. Finally, the crystal violet method was used to determine biofilm-forming ability. The results showed that the main significantly different proteins between the two represent isolates were related to biofilm formation. Furthermore, we have confirmed that ptxP1/fhaB3 showed hyperbiofilm formation in comparison with ptxP3/fhaB1. It is suggested that the resistance and adaptability of ptxP1/fhaB3 strains may be related to the formation of biofilm through proteomics. In a word, we determined the significantly different proteins between the ptxP1/fhaB3 and ptxP3/fhaB1 strains through whole-cell proteome, which were related to biofilm formation.
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Affiliation(s)
- Zhe Lv
- Department of Epidemiology and Health Statistics, School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an, 710061, China
| | - Sha Yin
- National Regional Children's Medical Center (Northwest), Key Laboratory of Precision Medicine to Pediatric Diseases of Shaanxi Province, Xi'an Key Laboratory of Children's Health and Diseases, Shaanxi Institute for Pediatric Diseases; Xi'an Children's Hospital, Affiliated Children's Hospital of Xi'an Jiaotong University, No. 69, Xijuyuan Lane, Xi'an, 710003, China
| | - Kaichong Jiang
- National Regional Children's Medical Center (Northwest), Key Laboratory of Precision Medicine to Pediatric Diseases of Shaanxi Province, Xi'an Key Laboratory of Children's Health and Diseases, Shaanxi Institute for Pediatric Diseases; Xi'an Children's Hospital, Affiliated Children's Hospital of Xi'an Jiaotong University, No. 69, Xijuyuan Lane, Xi'an, 710003, China
| | - Wei Wang
- Department of Clinical Laboratory, Xi'an Children's Hospital, Affiliated Children's Hospital of Xi'an Jiaotong University, No. 69, Xijuyuan Lane, Xi'an, 710003, China
| | - Yang Luan
- Xi'an Center for Disease Control and Prevention, 599 Xiying Road, Xi'an, 710054, China
| | - Shuang Wu
- Department of Clinical Laboratory, Xi'an Children's Hospital, Affiliated Children's Hospital of Xi'an Jiaotong University, No. 69, Xijuyuan Lane, Xi'an, 710003, China
| | - Jianfei Shi
- Department of Clinical Laboratory, Xi'an Children's Hospital, Affiliated Children's Hospital of Xi'an Jiaotong University, No. 69, Xijuyuan Lane, Xi'an, 710003, China
| | - Zhe Li
- Department of Diphtheria, Tetanus and Pertussis Vaccine and Toxins, National Institute for Food and Drug Control, Beijing, China
| | - Xiao Ma
- Department of Diphtheria, Tetanus and Pertussis Vaccine and Toxins, National Institute for Food and Drug Control, Beijing, China
| | - Zengguo Wang
- Department of Clinical Laboratory, Xi'an Children's Hospital, Affiliated Children's Hospital of Xi'an Jiaotong University, No. 69, Xijuyuan Lane, Xi'an, 710003, China.
| | - Hong Yan
- Department of Epidemiology and Health Statistics, School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an, 710061, China.
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Hafsa U, Chuwdhury GS, Hasan MK, Ahsan T, Moni MA. An in silico approach towards identification of novel drug targets in Klebsiella oxytoca. INFORMATICS IN MEDICINE UNLOCKED 2022. [DOI: 10.1016/j.imu.2022.100998] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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A Combinatorial Approach of High-Throughput Genomics and Mass Proteomics for Understanding the Regulation and Expression of Secondary Metabolite Production in Actinobacteria. mSystems 2021; 6:e0086221. [PMID: 34427500 PMCID: PMC8407205 DOI: 10.1128/msystems.00862-21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Secondary metabolites produced by Actinobacteria are an important source of antibiotics, drugs, and antimicrobial peptides. However, the large genome size of actinobacteria with high gene coding density makes it difficult to understand the complex regulation of biosynthesis of such critically and economically important products. In the last few decades, apart from genomics sequences, high-throughput proteomics has proven beneficial to understand the key players regulating the expression pattern of secondary metabolite and antibiotic production in different experimental set-ups. In the past, we have been analyzing the genomics data and mass spectrometry-based proteomics to predict the regulation dynamics and crucial regulatory hubs in Actinobacteria. The multidirectional regulation and expression of the biosynthetic gene cluster responsible for the production of important metabolite take their cue from the other primary metabolism pathways with which they show intricate interactions in the interactome. The regulation occurs by not only the action and expression of the biosynthetic gene cluster but also the role of transcription factors and primary metabolic pathways. Using the key players of these interactomes, we can regulate the synthesis/production of these valuable peptides/metabolites. Simultaneously, the multi-omics approach has now opened new gateways in investigation, screening, and identification of naturally occurring antimicrobial peptides from actinobacteria which are beneficial for humans and also provide economic and industrial benefits to humankind.
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Nemec A, Radolfová-Křížová L, Maixnerová M, Nemec M, Španělová P, Šafránková R, Šedo O, Lopes BS, Higgins PG. Delineation of a novel environmental phylogroup of the genus Acinetobacter encompassing Acinetobacter terrae sp. nov., Acinetobacter terrestris sp. nov. and three other tentative species. Syst Appl Microbiol 2021; 44:126217. [PMID: 34107439 DOI: 10.1016/j.syapm.2021.126217] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Revised: 05/14/2021] [Accepted: 05/14/2021] [Indexed: 11/29/2022]
Abstract
This study aimed to define the taxonomic position and structure of a novel, taxonomically unique group of 26 Acinetobacter strains, provisionally designated Taxon 24 (T24). The strains were recovered from soil and freshwater ecosystems (n = 21) or animals (n = 5) in Czechia, Scotland, Germany, the Netherlands and Turkey between 1993 and 2015. They were non-glucose-acidifying, nonhemolytic, nonproteolytic, growing at 32 °C and on acetate and ethanol as single carbon sources, but not on 4-hydroxybenzoate and mostly not at 37 °C. Their whole-genome sequences were 3.0-3.7 Mb in size, with GC contents of 39.8-41.3%. Based on core genome phylogenetic analysis, the 26 strains formed a distinct clade within the genus Acinetobacter, with strongly supported subclades termed T24A (n = 11), T24B (n = 8), T24C (n = 2), T24D (n = 3) and T24E (n = 2). The internal genomic ANIb values for these subclades were >94.8%, while the ANIb values between them were <92.5%. The results of MALDI-TOF MS-based analyses agreed with this classification. The five subclades differed from each other in the results of one to six carbon source assimilation tests. Given the genomic and phenotypic distinctness, internal coherence, numbers of available strains and geographically diverse origin of T24A and T24B, we propose the names Acinetobacter terrae sp. nov. and Acinetobacter terrestris sp. nov. for these two taxa, respectively. The type strains are ANC 4282v (= CCM 8986T = CCUG 73811T = CNCTC 8082T) and ANC 4471T (= CCM 8985T = CCUG 73812T = CNCTC 8093T), respectively. We conclude that these two species together with the other T24 strains represent a widely dispersed Acinetobacter clade primarily associated with terrestrial ecosystems.
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Affiliation(s)
- Alexandr Nemec
- Laboratory of Bacterial Genetics, Centre for Epidemiology and Microbiology, National Institute of Public Health, Šrobárova 48, 100 42 Prague 10, Czech Republic; Department of Medical Microbiology, Second Faculty of Medicine, Charles University, V Úvalu 84, 150 06 Prague 5, Czech Republic.
| | - Lenka Radolfová-Křížová
- Laboratory of Bacterial Genetics, Centre for Epidemiology and Microbiology, National Institute of Public Health, Šrobárova 48, 100 42 Prague 10, Czech Republic
| | - Martina Maixnerová
- Laboratory of Bacterial Genetics, Centre for Epidemiology and Microbiology, National Institute of Public Health, Šrobárova 48, 100 42 Prague 10, Czech Republic
| | - Matěj Nemec
- Laboratory of Bacterial Genetics, Centre for Epidemiology and Microbiology, National Institute of Public Health, Šrobárova 48, 100 42 Prague 10, Czech Republic
| | - Petra Španělová
- Czech National Collection of Type Cultures, Centre for Epidemiology and Microbiology, National Institute of Public Health, Šrobárova 48, 100 42 Prague 10, Czech Republic
| | - Renata Šafránková
- Czech National Collection of Type Cultures, Centre for Epidemiology and Microbiology, National Institute of Public Health, Šrobárova 48, 100 42 Prague 10, Czech Republic
| | - Ondrej Šedo
- Research Group Proteomics, Central European Institute of Technology and National Centre for Biomolecular Research, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic
| | - Bruno S Lopes
- School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, Aberdeen AB25 2ZD, UK
| | - Paul G Higgins
- Institute for Medical Microbiology, Immunology and Hygiene, University of Cologne, Goldenfelstrasse 19-21 50935 Cologne, and German Center for Infection Research (DZIF), Partner Site Bonn-Cologne, Cologne, Germany
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Gilroy R, Ravi A, Getino M, Pursley I, Horton DL, Alikhan NF, Baker D, Gharbi K, Hall N, Watson M, Adriaenssens EM, Foster-Nyarko E, Jarju S, Secka A, Antonio M, Oren A, Chaudhuri RR, La Ragione R, Hildebrand F, Pallen MJ. Extensive microbial diversity within the chicken gut microbiome revealed by metagenomics and culture. PeerJ 2021; 9:e10941. [PMID: 33868800 PMCID: PMC8035907 DOI: 10.7717/peerj.10941] [Citation(s) in RCA: 70] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Accepted: 01/22/2021] [Indexed: 12/27/2022] Open
Abstract
BACKGROUND The chicken is the most abundant food animal in the world. However, despite its importance, the chicken gut microbiome remains largely undefined. Here, we exploit culture-independent and culture-dependent approaches to reveal extensive taxonomic diversity within this complex microbial community. RESULTS We performed metagenomic sequencing of fifty chicken faecal samples from two breeds and analysed these, alongside all (n = 582) relevant publicly available chicken metagenomes, to cluster over 20 million non-redundant genes and to construct over 5,500 metagenome-assembled bacterial genomes. In addition, we recovered nearly 600 bacteriophage genomes. This represents the most comprehensive view of taxonomic diversity within the chicken gut microbiome to date, encompassing hundreds of novel candidate bacterial genera and species. To provide a stable, clear and memorable nomenclature for novel species, we devised a scalable combinatorial system for the creation of hundreds of well-formed Latin binomials. We cultured and genome-sequenced bacterial isolates from chicken faeces, documenting over forty novel species, together with three species from the genus Escherichia, including the newly named species Escherichia whittamii. CONCLUSIONS Our metagenomic and culture-based analyses provide new insights into the bacterial, archaeal and bacteriophage components of the chicken gut microbiome. The resulting datasets expand the known diversity of the chicken gut microbiome and provide a key resource for future high-resolution taxonomic and functional studies on the chicken gut microbiome.
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Affiliation(s)
| | | | - Maria Getino
- School of Veterinary Medicine, University of Surrey, Guildford, UK
| | - Isabella Pursley
- School of Veterinary Medicine, University of Surrey, Guildford, UK
| | - Daniel L. Horton
- School of Veterinary Medicine, University of Surrey, Guildford, UK
| | | | - Dave Baker
- Quadram Institute Bioscience, Norwich, UK
| | - Karim Gharbi
- Earlham Institute, Norwich Research Park, Norwich, UK
| | - Neil Hall
- Earlham Institute, Norwich Research Park, Norwich, UK
- University of East Anglia, Norwich, UK
| | - Mick Watson
- Roslin Institute, University of Edinburgh, Edinburgh, UK
| | | | | | - Sheikh Jarju
- Medical Research Council Unit The Gambia at the London School of Hygiene and Tropical Medicine, Atlantic Boulevard, Banjul, The Gambia
| | - Arss Secka
- West Africa Livestock Innovation Centre, Banjul, The Gambia
| | - Martin Antonio
- Medical Research Council Unit The Gambia at the London School of Hygiene and Tropical Medicine, Atlantic Boulevard, Banjul, The Gambia
| | - Aharon Oren
- Department of Plant and Environmental Sciences, The Alexander Silberman Institute of Life Sciences, Edmond J. Safra Campus, Hebrew University of Jerusalem, Jerusalem, Israel
| | - Roy R. Chaudhuri
- Department of Molecular Biology and Biotechnology, University of Sheffield, Sheffield, UK
| | | | - Falk Hildebrand
- Quadram Institute Bioscience, Norwich, UK
- Earlham Institute, Norwich Research Park, Norwich, UK
| | - Mark J. Pallen
- Quadram Institute Bioscience, Norwich, UK
- School of Veterinary Medicine, University of Surrey, Guildford, UK
- University of East Anglia, Norwich, UK
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Singhvi N, Singh P, Prakash O, Gupta V, Lal S, Bechthold A, Singh Y, Singh RK, Lal R. Differential mass spectrometry-based proteome analyses unveil major regulatory hubs in rifamycin B production in Amycolatopsis mediterranei. J Proteomics 2021; 239:104168. [PMID: 33662614 DOI: 10.1016/j.jprot.2021.104168] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 02/19/2021] [Accepted: 02/23/2021] [Indexed: 01/18/2023]
Abstract
Rifamycin B is produced by Amycolatopsis mediterranei S699 as a secondary metabolite. Its semi-synthetic derivatives have been used for curing tuberculosis caused by Mycobacterium tuberculosis. But the emergence of rifampicin-resistant strains required analogs of rifamycin B to be developed by rifamycin biosynthetic gene cluster manipulation. In 2014 genetic engineering of the rifamycin polyketide synthase gene cluster in S699 led to a mutant, A. mediterranei DCO#34, that produced 24-desmethylrifamycin B. Unfortunately, the productivity was strongly reduced to 20 mgL-1 as compared to 50 mgL-1 of rifamycin B. To understand the mechanisms leading to reduced productivity and rifamycin biosynthesis by A. mediterranei S699 during the early and late growth phase we performed a proteome study for wild type strain S699, mutant DCO#34, and the non-producer strain SCO2-2. Proteins identification and relative label-free quantification were performed by nLC-MS/MS. Data are available via ProteomeXchange with identifier PXD016416. Also, in-silico protein-protein interaction approach was used to determine the relationship between different structural and regulatory proteins involved in rifamycin biosynthesis. Our studies revealed RifA, RifK, RifL, Rif-Orf19 as the major regulatory hubs. Relative abundance expression values revealed that genes encoding RifC-RifI and the transporter RifP, down-regulated in DCO#34 and genes encoding RifR, RifZ, other regulatory proteins up-regulated. SIGNIFICANCE: The study is designed mainly to understand the underlying mechanisms of rifamycin biosynthesis in Amycolatopsis mediterranei. This resulted in the identification of regulatory hubs which play a crucial role in regulating secondary metabolism. It elucidates the complex mechanism of secondary metabolite biosynthesis and their conversion and extracellular transportation in temporal correlation with the different growth phases. The study also elucidated the mechanisms leading to reduced production of analog, 24-desmethylrifamycin B by the genetically modified strain DCO#34, derivatives of which have been found effective against rifampicin-resistant strains of Mycobacterium tuberculosis. These results can be useful while carrying out genetic manipulations to improve the strains of Amycolatopsis to produce better analogs/drugs and promote the eradication of TB. Thus, this study is contributing significantly to the growing knowledge in the field of the crucial drug, rifamycin B biosynthesis by an economically important bacterium Amycolatopsis mediterranei.
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Affiliation(s)
- Nirjara Singhvi
- Department of Zoology, University of Delhi, Delhi 110007, India
| | - Priya Singh
- Department of Zoology, University of Delhi, Delhi 110007, India
| | - Om Prakash
- National Centre for Microbial Resource-National Centre for Cell Sciences, Pune, Maharashtra 411007, India
| | - Vipin Gupta
- Department of Zoology, University of Delhi, Delhi 110007, India
| | - Sukanya Lal
- Department of Zoology, Ramjas College, University of Delhi, Delhi 110007, India
| | - Andreas Bechthold
- Pharmaceutical Biology and Biotechnology, Institute of Pharmaceutical Sciences, Albert-Ludwigs University, 79104 Freiburg, Germany
| | - Yogendra Singh
- Department of Zoology, University of Delhi, Delhi 110007, India
| | - Rakesh Kumar Singh
- Translational Science Laboratory, Florida State University, FL 32306, USA
| | - Rup Lal
- Department of Zoology, University of Delhi, Delhi 110007, India.
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Singhvi N, Gupta V, Singh P, Prakash O, Bechthold A, Singh Y, Lal R. Prediction of Transcription Factors and Their Involvement in Regulating Rifamycin Production in Amycolatopsis mediterranei S699. Indian J Microbiol 2020; 60:310-317. [PMID: 32655198 DOI: 10.1007/s12088-020-00868-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Accepted: 04/03/2020] [Indexed: 12/16/2022] Open
Abstract
Amycolatopsis mediterranei S699 produces rifamycin B and successors of this strain are in use for the industrial production of rifamycin B. Semisynthetic derivatives of rifamycin B are used against Mycobacterium tuberculosis that causes tuberculosis. Although the rifamycin biosynthetic gene cluster was characterized two decades ago, the regulation of rifamycin B biosynthesis in Amycolatopsis mediterranei S699 is poorly understood. In this study, we analysed the genome and proteome of Amycolatopsis mediterranei S699 and identified 1102 transcription factors which comprise about 10% of the total genome. Using interactomics approaches we delineated 30 unique transcription factors directly involved in secondary metabolism that regulate rifamycin B biosynthesis. We also predict the role of RifN as hub in controlling the regulation of other genes involved in rifamycin biosynthesis. RifN is important for maintaining the integrity of the rifamycin-network. Thus, these transcription factor can be exploited to improve rifamycin B production in Amycolatopsis mediterranei S699.
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Affiliation(s)
- Nirjara Singhvi
- Department of Zoology, University of Delhi, Delhi, 110007 India
| | - Vipin Gupta
- Department of Zoology, University of Delhi, Delhi, 110007 India
| | - Priya Singh
- Department of Zoology, University of Delhi, Delhi, 110007 India.,Present Address: Acharya Narendra Dev College, University of Delhi, New Delhi, 110019 India
| | - Om Prakash
- National Centre for Cell Sciences, Pune, Maharashtra 411007 India
| | - Andreas Bechthold
- Pharmaceutical Biology and Biotechnology, Institute of Pharmaceutical Sciences, Albert-Ludwigs University, 79104 Freiburg, Germany
| | - Yogendra Singh
- Department of Zoology, University of Delhi, Delhi, 110007 India
| | - Rup Lal
- The Energy and Resources Institute, Darbari Seth Block, IHC Complex, New Delhi, 110033 India
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11
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Hira P, Singh P, Pinnaka AK, Korpole S, Lal R. Taxonomically Characterized and Validated Bacterial Species Based on 16S rRNA Gene Sequences from India During the Last Decade. Indian J Microbiol 2019; 60:54-61. [PMID: 32089574 DOI: 10.1007/s12088-019-00845-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Accepted: 11/27/2019] [Indexed: 12/26/2022] Open
Abstract
Microbial taxonomy dealing with identification and characterization of prokaryotes like bacteria and archaea has always been a major area of research all over the world. Exploring diversity of microbes and description of novel species with different genes and secondary compounds is of utmost importance for better future and sustenance of life. India having an enormous range of ecosystems and diverse species inhabiting these niches is considered to be one of the richest biodiversity regions of the world. During the last decade, with newer methodologies and better technology, the prokaryotic taxonomy from India has extended our inventory of microbial communities in specific niches. However, there still exist some limitations in classifying the microbes from India as compared to that is done world-over. This review enlists the taxonomic description of novel taxa of prokaryotes from India in the past decade. A total of 378 new bacterial species have been classified from different habitats in India in the last ten years and no descriptions of archaeal species is documented till date.
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Affiliation(s)
- Princy Hira
- 1Department of Zoology, Maitreyi College (University of Delhi), Chanakyapuri, New Delhi 110021 India
| | - Priya Singh
- 2Department of Zoology, Acharya Narendra Dev College (University of Delhi), Govindpuri, Kalkaji, New Delhi, 110019 India
| | - Anil Kumar Pinnaka
- 3CSIR-Institute of Microbial Technology, Sector 39A, Chandigarh, 160036 India
| | - Suresh Korpole
- 3CSIR-Institute of Microbial Technology, Sector 39A, Chandigarh, 160036 India
| | - Rup Lal
- The Energy and Resource Institute, Darbari Seth Block, IHC Complex, Lodhi Road, New Delhi, 110003 India
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12
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Comparative genomics of Sphingopyxis spp. unravelled functional attributes. Genomics 2019; 112:1956-1969. [PMID: 31740292 DOI: 10.1016/j.ygeno.2019.11.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Revised: 11/12/2019] [Accepted: 11/14/2019] [Indexed: 01/01/2023]
Abstract
Members of genus Sphingopyxis are known to thrive in diverse environments. Genomes of 21 Sphingopyxis strains were selected. Phylogenetic analysis was performed using GGDC, AAI and core-SNP showed agreement at sub-species level. Based on our results, we propose that both S. baekryungensis DSM16222 and Sphingopyxis sp. LPB0140 strains should not be included under genus Sphingopyxis. Core-analysis revealed, 1422 genes were shared which included essential pathways and genes for conferring adaptation against stress environment. Polyhydroxybutyrate degradation, anaerobic respiration, type IV secretion were notable abundant pathways and exopolysaccharide, hyaluronic acid production and toxin-antitoxin system were differentially present families. Interestingly, genome of S. witflariensis DSM14551, Sphingopyxis sp. MG and Sphingopyxis sp. FD7 provided a hint of probable pathogenic abilities. Protein-Protein Interactome depicted that membrane proteins and stress response has close integration with core-proteins while aromatic compounds degradation and virulence ability formed a separate network. Thus, these should be considered as strain specific attributes.
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13
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Liang Y, Hong Y, Mai Z, Zhu Q, Guo L. Internal and External Microbial Community of the Thitarodes Moth, the Host of Ophiocordyceps sinensis. Microorganisms 2019; 7:microorganisms7110517. [PMID: 31683719 PMCID: PMC6920881 DOI: 10.3390/microorganisms7110517] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Revised: 10/24/2019] [Accepted: 10/29/2019] [Indexed: 12/21/2022] Open
Abstract
Ophiocordyceps sinensis is a widely known medicinal entomogenous fungus, which parasitizes the soil-borne larva of Thitarodes (Hepialidae, Lepidoptera) distributed in the Qinghai–Tibetan Plateau and its adjacent areas. Previous research has involved artificial cultivation of Chinese cordyceps (the fungus-caterpillar complex), but it is difficult to achieve large-scale cultivation because the coupling relation between the crucial microbes and their hosts is not quite clear. To clarify the influence of the internal microbial community on the occurrence of Chinese cordyceps, in this study, the unfertilized eggs of Thitarodes of different sampling sites were chosen to analyze the bacterial and fungal communities via 16S rRNA and ITS sequencing for the first time. The results showed that for bacteria, 348 genera (dominant genera include Wolbachia, Spiroplasma, Carnobacterium, Sphingobium, and Acinetobacter) belonging to 26 phyla (dominant phyla include Proteobacteria, Firmicutes, Tenericutes, Actinobacteria, Acidobacteria, and Bacteroidetes), 58 classes, 84 orders, and 120 families were identified from 1294 operational taxonomic units (OTUs). The dominant bacterial genus (Spiroplasma) may be an important bacterial factor promoting the occurrence of Chinese cordyceps. For fungi, 289 genera, mainly including Aureobasidium, Candida, and Cryptococcus, were identified, and they belonged to 5 phyla (Ascomycota, Basidiomycota, Chytridiomycota, Glomeromycota, and Zygomycota), 26 classes, 82 orders, and 165 families. Eight bacterial OTUs and 12 fungal OTUs were shared among all of the detected samples and were considered as core species. Among them, Wolbachia, Spiroplasma, Carnobacterium, Aureobasidium, and Phoma may play important roles in helping the host larva to digest foods, adapt to extreme environments, or resist pathogens. On the other hand, the external (soil) microbial community was synchronously and comparatively analyzed. Comparative analysis revealed that external microbial factors might play a more significant role in the occurrence of Chinese cordyceps, owing to the significant differences revealed by α-diversity and β-diversity analyses among different groups. In summary, the results of this study may contribute to the large-scale cultivation of Chinese cordyceps.
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Affiliation(s)
- Yi Liang
- Dongguan Key Laboratory of Environmental Medicine, School of Public Health, Guangdong Medical University, Dongguan 523808, China.
| | - Yuehui Hong
- Department of Basic Medicine, Guangdong Jiangmen Chinese Medical College, Jiangmen 529000, China.
| | - Zhanhua Mai
- Dongguan Key Laboratory of Environmental Medicine, School of Public Health, Guangdong Medical University, Dongguan 523808, China.
| | - Qijiong Zhu
- Dongguan Key Laboratory of Environmental Medicine, School of Public Health, Guangdong Medical University, Dongguan 523808, China.
| | - Lianxian Guo
- Dongguan Key Laboratory of Environmental Medicine, School of Public Health, Guangdong Medical University, Dongguan 523808, China.
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14
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Beaton A, Lood C, Cunningham-Oakes E, MacFadyen A, Mullins AJ, Bestawy WE, Botelho J, Chevalier S, Coleman S, Dalzell C, Dolan SK, Faccenda A, Ghequire MGK, Higgins S, Kutschera A, Murray J, Redway M, Salih T, da Silva AC, Smith BA, Smits N, Thomson R, Woodcock S, Welch M, Cornelis P, Lavigne R, van Noort V, Tucker NP. Community-led comparative genomic and phenotypic analysis of the aquaculture pathogen Pseudomonas baetica a390T sequenced by Ion semiconductor and Nanopore technologies. FEMS Microbiol Lett 2019; 365:4951603. [PMID: 29579234 PMCID: PMC5909648 DOI: 10.1093/femsle/fny069] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2018] [Accepted: 03/21/2018] [Indexed: 12/29/2022] Open
Abstract
Pseudomonas baetica strain a390T is the type strain of this recently described species and here we present its high-contiguity draft genome. To celebrate the 16th International Conference on Pseudomonas, the genome of P. baetica strain a390T was sequenced using a unique combination of Ion Torrent semiconductor and Oxford Nanopore methods as part of a collaborative community-led project. The use of high-quality Ion Torrent sequences with long Nanopore reads gave rapid, high-contiguity and -quality, 16-contig genome sequence. Whole genome phylogenetic analysis places P. baetica within the P. koreensis clade of the P. fluorescens group. Comparison of the main genomic features of P. baetica with a variety of other Pseudomonas spp. suggests that it is a highly adaptable organism, typical of the genus. This strain was originally isolated from the liver of a diseased wedge sole fish, and genotypic and phenotypic analyses show that it is tolerant to osmotic stress and to oxytetracycline.
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Affiliation(s)
- Ainsley Beaton
- Strathclyde Institute of Pharmacy and Biomedical Science, University of Strathclyde, 161 Cathedral Street, Glasgow, G4 0RE, UK
| | - Cédric Lood
- Centre of Microbial and Plant Genetics, KU Leuven, Kasteelpark Arenberg 20, bus 2460, Leuven B-3001, Belgium.,Laboratory of Gene Technology, KU Leuven, Kasteelpark Arenberg 20, bus 2460, Leuven B-3001, Belgium
| | - Edward Cunningham-Oakes
- Cardiff School of Biosciences, Cardiff University, Sir Martin Evans Building, Park Place, Cardiff CF10 3AX, UK
| | - Alison MacFadyen
- Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush Campus, Midlothian EH25 9RG, Scotland, UK
| | - Alex J Mullins
- Cardiff School of Biosciences, Cardiff University, Sir Martin Evans Building, Park Place, Cardiff CF10 3AX, UK
| | - Walid El Bestawy
- Strathclyde Institute of Pharmacy and Biomedical Science, University of Strathclyde, 161 Cathedral Street, Glasgow, G4 0RE, UK
| | - João Botelho
- UCIBIO/REQUIMTE, Laboratório de Microbiologia, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Ferreira no. 228 Porto 4050-313, Portugal
| | - Sylvie Chevalier
- Laboratoire Microbiologie Signaux et Microenvironnement (LMSM), Université de Rouen, 55, rue St Germain, Evreux 27000, France
| | - Shannon Coleman
- Lower Mall Research Station, University of British Columbia, 2259 Lower Mall, Vancouver, BC V6T 1Z4, Canada
| | - Chloe Dalzell
- Strathclyde Institute of Pharmacy and Biomedical Science, University of Strathclyde, 161 Cathedral Street, Glasgow, G4 0RE, UK
| | - Stephen K Dolan
- Department of Biochemistry, University of Cambridge, Hopkins Building, Tennis Court Road, Cambridge CB2 1QW, UK
| | - Alberto Faccenda
- Strathclyde Institute of Pharmacy and Biomedical Science, University of Strathclyde, 161 Cathedral Street, Glasgow, G4 0RE, UK
| | - Maarten G K Ghequire
- Centre of Microbial and Plant Genetics, KU Leuven, Kasteelpark Arenberg 20, bus 2460, Leuven B-3001, Belgium
| | - Steven Higgins
- Department of Plant and Microbial Biology, University of Zürich, Zürich 8008, Switzerland
| | - Alexander Kutschera
- Department of Phytopathology, Center of Life and Food Sciences, Technical University of Munich, Weihenstephan D-85354, Germany
| | - Jordan Murray
- Strathclyde Institute of Pharmacy and Biomedical Science, University of Strathclyde, 161 Cathedral Street, Glasgow, G4 0RE, UK
| | - Martha Redway
- Strathclyde Institute of Pharmacy and Biomedical Science, University of Strathclyde, 161 Cathedral Street, Glasgow, G4 0RE, UK
| | - Talal Salih
- Strathclyde Institute of Pharmacy and Biomedical Science, University of Strathclyde, 161 Cathedral Street, Glasgow, G4 0RE, UK
| | - Ana C da Silva
- Centre for Biomolecular Sciences, School of Life Sciences, University of Nottingham, Nottingham NG7 2RD, UK
| | - Brian A Smith
- School of Plant Sciences, The University of Arizona, P.O. Box 210036, Forbes Building, 303 Tucson, Arizona 85721-0036, USA
| | - Nathan Smits
- Laboratory of Gene Technology, KU Leuven, Kasteelpark Arenberg 20, bus 2460, Leuven B-3001, Belgium
| | - Ryan Thomson
- Strathclyde Institute of Pharmacy and Biomedical Science, University of Strathclyde, 161 Cathedral Street, Glasgow, G4 0RE, UK
| | - Stuart Woodcock
- Department of Biological Chemistry, John Innes Centre, Colney Lane, Norwich NR4 7UH, UK
| | - Martin Welch
- Department of Biochemistry, University of Cambridge, Hopkins Building, Tennis Court Road, Cambridge CB2 1QW, UK
| | - Pierre Cornelis
- Laboratoire Microbiologie Signaux et Microenvironnement (LMSM), Université de Rouen, 55, rue St Germain, Evreux 27000, France
| | - Rob Lavigne
- Laboratory of Gene Technology, KU Leuven, Kasteelpark Arenberg 20, bus 2460, Leuven B-3001, Belgium
| | - Vera van Noort
- Centre of Microbial and Plant Genetics, KU Leuven, Kasteelpark Arenberg 20, bus 2460, Leuven B-3001, Belgium
| | - Nicholas P Tucker
- Strathclyde Institute of Pharmacy and Biomedical Science, University of Strathclyde, 161 Cathedral Street, Glasgow, G4 0RE, UK
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15
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Sood U, Hira P, Kumar R, Bajaj A, Rao DLN, Lal R, Shakarad M. Comparative Genomic Analyses Reveal Core-Genome-Wide Genes Under Positive Selection and Major Regulatory Hubs in Outlier Strains of Pseudomonas aeruginosa. Front Microbiol 2019; 10:53. [PMID: 30787911 PMCID: PMC6372532 DOI: 10.3389/fmicb.2019.00053] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Accepted: 01/14/2019] [Indexed: 12/11/2022] Open
Abstract
Genomic information for outlier strains of Pseudomonas aeruginosa is exiguous when compared with classical strains. We sequenced and constructed the complete genome of an environmental strain CR1 of P. aeruginosa and performed the comparative genomic analysis. It clustered with the outlier group, hence we scaled up the analyses to understand the differences in environmental and clinical outlier strains. We identified eight new regions of genomic plasticity and a plasmid pCR1 with a VirB/D4 complex followed by trimeric auto-transporter that can induce virulence phenotype in the genome of strain CR1. Virulence genotype analysis revealed that strain CR1 lacked hemolytic phospholipase C and D, three genes for LPS biosynthesis and had reduced antibiotic resistance genes when compared with clinical strains. Genes belonging to proteases, bacterial exporters and DNA stabilization were found to be under strong positive selection, thus facilitating pathogenicity and survival of the outliers. The outliers had the complete operon for the production of vibrioferrin, a siderophore present in plant growth promoting bacteria. The competence to acquire multidrug resistance and new virulence factors makes these strains a potential threat. However, we identified major regulatory hubs that can be used as drug targets against both the classical and outlier groups.
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Affiliation(s)
- Utkarsh Sood
- Department of Zoology, University of Delhi, New Delhi, India
- PhiXGen Private Limited, Gurugram, India
| | - Princy Hira
- Department of Zoology, University of Delhi, New Delhi, India
| | - Roshan Kumar
- Department of Zoology, University of Delhi, New Delhi, India
- PhiXGen Private Limited, Gurugram, India
- Department of Veterinary & Biomedical Sciences, South Dakota State University, Brookings, SD, United States
| | - Abhay Bajaj
- Department of Zoology, University of Delhi, New Delhi, India
- National Centre for Microbial Resource, National Centre for Cell Science, Pune, India
| | | | - Rup Lal
- Department of Zoology, University of Delhi, New Delhi, India
- PhiXGen Private Limited, Gurugram, India
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16
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Uddin R, Jamil F. Prioritization of potential drug targets against P. aeruginosa by core proteomic analysis using computational subtractive genomics and Protein-Protein interaction network. Comput Biol Chem 2018; 74:115-122. [DOI: 10.1016/j.compbiolchem.2018.02.017] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2017] [Revised: 01/06/2018] [Accepted: 02/22/2018] [Indexed: 01/12/2023]
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