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R M, S I, Kv S, Kp S, T R, G S, K R. Genomic characterization of Enterobacter xiangfangensis STP-3: Application to real time petroleum oil sludge bioremediation. Microbiol Res 2021; 253:126882. [PMID: 34619415 DOI: 10.1016/j.micres.2021.126882] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 09/19/2021] [Accepted: 09/24/2021] [Indexed: 10/20/2022]
Abstract
Sustainable treatment of petroleum oil sludge still remains as a major challenge to petroleum refineries. Bioremediation is the promising technology involving bacteria for simultaneous production of biosurfactant and followed by degradation of petroleum compounds. Complete genomic knowledge on such potential microbes could accentuate its successful exploitation. The present study discusses the genomic characteristics of novel biosurfactant producing petrophilic/ petroleum hydrocarbon degrading strain, Enterobacter xiangfangensis STP-3, isolated from petroleum refinery oil sludge contaminated soil. The genome has 4,584,462 bp and 4372 protein coding sequences. Functional analysis using the RAST and KEGG databases revealed the presence of biosynthetic gene clusters linked to glycolipid and lipopeptide production and multiple key candidate genes linked with the degradation pathway of petroleum hydrocarbons. Orthology study revealed diversity in gene clusters associated to membrane transport, carbohydrate, amino acid metabolism, virulence and defence mechanisms, and nucleoside and nucleotide synthesis. The comparative analysis with 27 other genomes predicted that the core genome contributes to its inherent bioremediation potential, whereas the accessory genome influences its environmental adaptability in unconventional environmental conditions. Further, experimental results showed that E. xiangfangensis STP-3 was able to degrade PHCs by 82 % in 14 days during the bioremediation of real time petroleum oil sludge with the concomitant production of biosurfactant and metabolic enzymes, To the best of our knowledge, no comprehensive genomic study has been previously reported on the biotechnological prospective of this species.
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Affiliation(s)
- Muneeswari R
- Biomolecules and Biocatalysis Laboratory, Department of Biotechnology, SRM Institute of Science and Technology, Kattankulathur, 603203, Kancheepuram District, Tamil Nadu, India
| | - Iyappan S
- Department of Genetic Engineering, SRM Institute of Science and Technology, Kattankulathur, 603 203, Kancheepuram District, Tamil Nadu, India
| | - Swathi Kv
- Biomolecules and Biocatalysis Laboratory, Department of Biotechnology, SRM Institute of Science and Technology, Kattankulathur, 603203, Kancheepuram District, Tamil Nadu, India
| | - Sudheesh Kp
- Nutrition, Genetics and Biotechnology Division, ICAR-Central Institute of Brackishwater Aquaculture, Chennai, 600028, Tamil Nadu, India
| | - Rajesh T
- CSIR-National Environmental Engineering Research Institute, Chennai Zonal Lab, Tamil Nadu, India
| | - Sekaran G
- Biomolecules and Biocatalysis Laboratory, Department of Biotechnology, SRM Institute of Science and Technology, Kattankulathur, 603203, Kancheepuram District, Tamil Nadu, India
| | - Ramani K
- Biomolecules and Biocatalysis Laboratory, Department of Biotechnology, SRM Institute of Science and Technology, Kattankulathur, 603203, Kancheepuram District, Tamil Nadu, India.
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