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Joshi A, Thite S, Godbole D, Boruah D, Sindhu DK, Prabhu A, Joseph N, Yadav A, Sharma A, Lodha T. Genomic insights into Marinospirillum alkalitolerans sp. nov., a novel PHB producing bacterium from an Indian impact crater, and an emended description of family Oceanospirillaceae. Antonie Van Leeuwenhoek 2025; 118:53. [PMID: 39928221 DOI: 10.1007/s10482-024-02059-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2024] [Accepted: 12/29/2024] [Indexed: 02/11/2025]
Abstract
Two Gram-stain-negative bacterial strains (MEB164T and MEB148), were isolated from haloalkaline waters of Lonar, crater lake, India. The strains were helical, non-spore-forming and motile with polar tufts of flagella. Optimal growth occurred at 37 ℃, at pH 10 and with 3% (w/v) NaCl. 16S rRNA gene sequences of strains (MEB164T and MEB148) demonstrated the highest similarity with Marinospirillum alkaliphilum DSM 21637T (97.8%) followed by Marinospirillum celere DSM 18438T (96%). The genome size of strain MEB164T was determined to be 2.8 Mb with genomic DNA G + C contents of 53.1 mol %. ANI and dDDH values between strain MEB164T and the most closely related type strain M. alkaliphilum DSM 21637T were (72.3% and 21.4 ± 2.3%) while (AAI and POCP) values were (66.8 and 70.8%), respectively. Strain MEB164T exhibited potential for polyhydroxybutyrate (PHB) production, supported by key genes involved in PHB metabolism. Genome analysis further revealed presence of various pH tolerance genes, highlighting its adaptation to Lonar Lake. The predominant cellular fatty acids were summed feature 8 (C18:1 ω7c/C18:1 ω6c), C16:0 and summed feature 3 (C16:1 ω7c/C16:1 ω6c). The major respiratory quinone was ubiquinone-8. The prevalent polar lipids were diaminophosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine, two unidentified amino phospholipids, three unidentified phospholipids and one unidentified lipid. Polyphasic analysis suggests that the two strains constitute a novel species within the genus Marinospirillum (family Oceanospirillaceae), proposed as Marinospirillum alkalitolerans sp. nov. The type strain is MEB164T (= JCM 35957T = MCC 5207T = NCIMB 15458T) and MEB148 (= JCM 35956 = MCC 5212 = NCIMB 15459) is an additional strain.
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Affiliation(s)
- Amaraja Joshi
- National Centre for Microbial Resource (NCMR), National Centre for Cell Science, NCCS Complex, Savitribai Phule Pune University Campus, Ganeshkhind Road, Pune, Maharashtra, 411007, India.
| | - Sonia Thite
- National Centre for Microbial Resource (NCMR), National Centre for Cell Science, NCCS Complex, Savitribai Phule Pune University Campus, Ganeshkhind Road, Pune, Maharashtra, 411007, India
| | - Devika Godbole
- National Centre for Microbial Resource (NCMR), National Centre for Cell Science, NCCS Complex, Savitribai Phule Pune University Campus, Ganeshkhind Road, Pune, Maharashtra, 411007, India
| | - Dibyajyoti Boruah
- Department of Pathology, Armed Forces Medical College, Pune, 411040, India
| | - Dev Kant Sindhu
- Microbial Type Culture Collection and Gene Bank (MTCC), CSIR-Institute of Microbial Technology, Chandigarh, 160036, India
- Jawaharlal Nehru University, New Delhi, 110067, India
| | - Atharva Prabhu
- National Centre for Microbial Resource (NCMR), National Centre for Cell Science, NCCS Complex, Savitribai Phule Pune University Campus, Ganeshkhind Road, Pune, Maharashtra, 411007, India
| | - Neetha Joseph
- National Centre for Microbial Resource (NCMR), National Centre for Cell Science, NCCS Complex, Savitribai Phule Pune University Campus, Ganeshkhind Road, Pune, Maharashtra, 411007, India
| | - Amit Yadav
- National Centre for Microbial Resource (NCMR), National Centre for Cell Science, NCCS Complex, Savitribai Phule Pune University Campus, Ganeshkhind Road, Pune, Maharashtra, 411007, India
| | - Avinash Sharma
- National Centre for Microbial Resource (NCMR), National Centre for Cell Science, NCCS Complex, Savitribai Phule Pune University Campus, Ganeshkhind Road, Pune, Maharashtra, 411007, India
| | - Tushar Lodha
- Bioenergy Group, Agharkar Research Institute, Gopal Ganesh Agarkar Road, Pune, Maharashtra, 411004, India.
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Sahai K, Asthana B. Lab sciences: Going beyond the realms of diagnosis!! Med J Armed Forces India 2024; 80:617-619. [PMID: 39990535 PMCID: PMC11842923 DOI: 10.1016/j.mjafi.2024.08.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2024] [Accepted: 08/25/2024] [Indexed: 02/25/2025] Open
Affiliation(s)
- Kavita Sahai
- Commandant, AMC Centre & College and OIC Records & Colonel Commandant, Lucknow, India
| | - Bhushan Asthana
- Deputy Commandant & Senior Instructor, Officers Training College, AMC Centre & College, Lucknow, India
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