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Johny TK, Puthusseri RM, Saidumohamed BE, Sheela UB, Puthusseri SP, Sasidharan RS, Bhat SG. Correction to: Appraisal of cytotoxicity and acrylamide mitigation potential of L-asparaginase SlpA from fish gut microbiome. Appl Microbiol Biotechnol 2022; 106:3849-3850. [PMID: 35616723 DOI: 10.1007/s00253-022-11992-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Affiliation(s)
- Tina Kollannoor Johny
- Department of Biotechnology, Cochin University of Science and Technology, Cochin, Kerala, 682022, India
| | - Rinu Madhu Puthusseri
- Department of Biotechnology, Cochin University of Science and Technology, Cochin, Kerala, 682022, India
| | | | | | - Saipriya Parol Puthusseri
- Department of Biotechnology, Cochin University of Science and Technology, Cochin, Kerala, 682022, India
| | - Raghul Subin Sasidharan
- Department of Zoology, Government College Kariavattom, University of Kerala, Thiruvananthapuram, Kerala, 695581, India
| | - Sarita Ganapathy Bhat
- Department of Biotechnology, Cochin University of Science and Technology, Cochin, Kerala, 682022, India.
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Johny TK, Puthusseri RM, Saidumohamed BE, Sheela UB, Puthusseri SP, Sasidharan RS, Bhat SG. Appraisal of cytotoxicity and acrylamide mitigation potential of L-asparaginase SlpA from fish gut microbiome. Appl Microbiol Biotechnol 2022; 106:3583-3598. [PMID: 35579684 DOI: 10.1007/s00253-022-11954-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 12/18/2021] [Revised: 04/27/2022] [Accepted: 05/03/2022] [Indexed: 11/29/2022]
Abstract
L-asparaginase catalyzes the hydrolysis of L-asparagine to L-aspartic acid and ammonia. It has application in the treatment of acute lymphoblastic leukemia in children, as well as in other malignancies, in addition to its role as a food processing aid for the mitigation of acrylamide formation in the baking industry. Its use in cancer chemotherapy is limited due to problems such as its intrinsic glutaminase activity and associated side effects, leading to an increased interest in the search for novel L-asparaginases without L-glutaminase activity. This study reports the cloning and expression of an L-asparaginase contig obtained from whole metagenome shotgun sequencing of Sardinella longiceps gut microbiota. Purified recombinant glutaminase-free L-asparaginase SlpA was a 74 kDa homodimer, with maximal activity at pH 8 and 30 °C. Km and Vmax of SlpA were determined to be 3.008 mM and 0.014 mM/min, respectively. SlpA displayed cytotoxic activity against K-562 (chronic myeloid leukemia) and MCF-7 (breast cancer) cell lines with IC50 values of 0.3443 and 2.692 U/mL, respectively. SlpA did not show any cytotoxic activity against normal lymphocytes and was proved to be hemocompatible. Pre-treatment of biscuit and bread dough with different concentrations of SlpA resulted in a clear, dose-dependent reduction of acrylamide formation during baking. KEY POINTS: • Cloned and expressed L-asparaginase (SlpA) from fish gut microbiota • Purified SlpA displayed good cytotoxicity against K-562 and MCF-7 cell lines • SlpA addition caused a significant reduction of acrylamide formation during baking.
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Affiliation(s)
- Tina Kollannoor Johny
- Department of Biotechnology, Cochin University of Science and Technology, Cochin, Kerala, 682022, India
| | - Rinu Madhu Puthusseri
- Department of Biotechnology, Cochin University of Science and Technology, Cochin, Kerala, 682022, India
| | | | | | - Saipriya Parol Puthusseri
- Department of Biotechnology, Cochin University of Science and Technology, Cochin, Kerala, 682022, India
| | - Raghul Subin Sasidharan
- Department of Zoology, Government College Kariavattom, University of Kerala, Thiruvananthapuram, Kerala, 695581, India
| | - Sarita Ganapathy Bhat
- Department of Biotechnology, Cochin University of Science and Technology, Cochin, Kerala, 682022, India.
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Swaminathan TR, Johny TK, Nithianantham SR, Sudhagar A, Pradhan PK, S R KS, Nair RR, Sood N. A natural outbreak of infectious spleen and kidney necrosis virus (ISKNV) threatens wild pearlspot, Etroplus suratensis in Peechi Dam in the Western Ghats biodiversity hotspot, India. Transbound Emerg Dis 2022; 69:e1595-e1605. [PMID: 35235241 DOI: 10.1111/tbed.14494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 08/20/2021] [Revised: 02/18/2022] [Accepted: 02/20/2022] [Indexed: 11/27/2022]
Abstract
A large-scale mortality of pearlspot, Etroplus suratensis was reported from Peechi Dam, an artificial tropical lake made for irrigation and drinking water supply in Kerala, India during 2018. This dam is located in the premises of Western Ghats, recognized as one of the biodiversity hotspots of the world. The objective of this study was to identify the aetiological agent of this large-scale mortality of E. suratensis by systematic diagnostic investigation and identification of pathogen. Virus isolation was carried out on a species-specific pearlspot fin (PSF) cell line. Infected PSF cells showed cytopathic effects (CPE) like cell shrinkage, rounding, enlargement, clustering, and subsequent detachment of cells with a high viral titre of 106⋅95 TCID50 mL-1 at 8 days post inoculation (dpi). Histopathological examination of the fish showed the presence of numerous abnormal enlarged basophilic cells and intracytoplasmic eosinophilic inclusions in the liver. Moreover, transmission electron microscopy (TEM) analysis revealed the presence of large numbers of 125-132 nm viral particles in the spleen tissues. PCR amplification and phylogenetic analysis of the major capsid protein (MCP) gene sequence confirmed that the causative agent was Infectious spleen and kidney necrosis virus (ISKNV) of the genus Megalocytivirus. The experimental infection recorded 86.7±2.7% mortality in the E. suratensis (body weight - 11.01±2.7 g; body length 8.01±2.23 cm) injected with 1 × 104⋅25 TCID50 mL-1 ISKNV per fish. Our detailed investigation provided definitive diagnosis of ISKNV in the severe mass mortality event in wild E. suratensis in Peechi Dam, India, adding one more species to expanding host range of ISKNV infection. The high mortality rate of ISKNV infection in pearlspot suggests the perilous nature of this disease, particularly among the wild fish population. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Thangaraj Raja Swaminathan
- Peninsular and Marine Fish Genetic Resources Centre, ICAR-NBFGR, CMFRI Campus, Kochi, Kerala, 682 018, India
| | - Tina Kollannoor Johny
- Peninsular and Marine Fish Genetic Resources Centre, ICAR-NBFGR, CMFRI Campus, Kochi, Kerala, 682 018, India
| | - Sundar Raj Nithianantham
- Peninsular and Marine Fish Genetic Resources Centre, ICAR-NBFGR, CMFRI Campus, Kochi, Kerala, 682 018, India
| | - Arun Sudhagar
- Peninsular and Marine Fish Genetic Resources Centre, ICAR-NBFGR, CMFRI Campus, Kochi, Kerala, 682 018, India
| | - Pravata Kumar Pradhan
- ICAR National Bureau of Fish Genetic Resources, Lucknow, Uttar Pradesh, 226002, India
| | - Krupesha Sharma S R
- ICAR Central Marine Fisheries Research Institute, Kochi, Kerala, 682 018, India
| | - Reshma R Nair
- Peninsular and Marine Fish Genetic Resources Centre, ICAR-NBFGR, CMFRI Campus, Kochi, Kerala, 682 018, India
| | - Neeraj Sood
- ICAR National Bureau of Fish Genetic Resources, Lucknow, Uttar Pradesh, 226002, India
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Preena PG, Kumar TVA, Johny TK, Dharmaratnam A, Swaminathan TR. Quick hassle-free detection of cyprinid herpesvirus 2 (CyHV-2) in goldfish using recombinase polymerase amplification-lateral flow dipstick (RPA-LFD) assay. Aquac Int 2022; 30:1211-1220. [PMID: 35194344 PMCID: PMC8854473 DOI: 10.1007/s10499-021-00806-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Accepted: 11/15/2021] [Indexed: 06/14/2023]
Abstract
Cyprinid herpesvirus 2 (CyHV-2) is the etiological agent of herpesviral hematopoietic necrosis disease (HVHND), which causes severe mortality in ornamental goldfish (Carassius auratus), crucian carp (Carassius auratus), and gibel/prussian carp (Carassius gibelio). Quick and hassle-free point-of-care detection of CyHV-2 is vital for the maintenance of ornamental fish health. In this manuscript, we describe the development of a rapid and sensitive RPA (recombinase polymerase amplification) assay, coupled with lateral flow dipsticks (LFD), that can achieve sensitive diagnosis of CyHV-2 in goldfish within 20 min at 36 °C with the satisfactory detection limit of 102 gene copies per reaction. This is the first report wherein major capsid protein (MCP) of CyHV-2 was targeted for RPA-LFD assay development. The assay did not show any cross-reactivity with other viral pathogens like cyprinid herpesvirus 3 (CyHV-3), spring viremia of carp virus (SVCV), infectious spleen and kidney necrosis virus (ISKNV), and viral nervous necrosis virus (VNNV). Furthermore, screening of CyHV-2 infection in CyHV-2-infected goldfish did not yield any false positive/negative results. In short, the RPA-LFD assay developed in this study presents a simple, rapid, and sensitive method for point-of-care diagnosis of CyHV-2, especially under resource-limited conditions.
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Affiliation(s)
- Prasannan Geetha Preena
- Peninsular and Marine Fish Genetic Resources Centre, ICAR- National Bureau of Fish Genetic Resources, CMFRI Campus, P.O. Number 1603, Kochi, Kerala India 682 018
| | - Thaliyil Veetil Arun Kumar
- Peninsular and Marine Fish Genetic Resources Centre, ICAR- National Bureau of Fish Genetic Resources, CMFRI Campus, P.O. Number 1603, Kochi, Kerala India 682 018
- Krishi Vigyan Kendra, ICAR-National Dairy Research Institute (NDRI), Karnal, Haryana India 132001
| | - Tina Kollannoor Johny
- Peninsular and Marine Fish Genetic Resources Centre, ICAR- National Bureau of Fish Genetic Resources, CMFRI Campus, P.O. Number 1603, Kochi, Kerala India 682 018
| | - Arathi Dharmaratnam
- Peninsular and Marine Fish Genetic Resources Centre, ICAR- National Bureau of Fish Genetic Resources, CMFRI Campus, P.O. Number 1603, Kochi, Kerala India 682 018
| | - Thangaraj Raja Swaminathan
- Peninsular and Marine Fish Genetic Resources Centre, ICAR- National Bureau of Fish Genetic Resources, CMFRI Campus, P.O. Number 1603, Kochi, Kerala India 682 018
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Johny TK, Puthusseri RM, Bhat SG. Metagenomic landscape of taxonomy, metabolic potential and resistome of Sardinella longiceps gut microbiome. Arch Microbiol 2021; 204:87. [PMID: 34961896 DOI: 10.1007/s00203-021-02675-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 07/01/2021] [Revised: 11/27/2021] [Accepted: 12/07/2021] [Indexed: 01/08/2023]
Abstract
Fish gut microbiota, encompassing a colossal reserve of microbes represents a dynamic ecosystem, influenced by a myriad of environmental and host factors. The current study presents a comprehensive insight into Sardinella longiceps gut microbiome using whole metagenome shotgun sequencing. Taxonomic profiling identified the predominance of phylum Proteobacteria, comprising of Photobacterium, Vibrio and Shewanella sp. Functional annotation revealed the dominance of Clustering based subsystems, Carbohydrate, and Amino acids and derivatives. Analysis of Virulence, disease and defense subsystem identified genes conferring resistance to antibiotics and toxic compounds, like multidrug resistance efflux pumps and resistance genes for fluoroquinolones and heavy metals like cobalt, zinc, cadmium and copper. The presence of overlapping genetic mechanisms of resistance to antibiotics and heavy metals, like the efflux pumps is a serious cause of concern as it is likely to aggravate co-selection pressure, leading to an increased dissemination of these resistance genes to fish and humans.
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Affiliation(s)
- Tina Kollannoor Johny
- Department of Biotechnology, Cochin University of Science and Technology, Kalamassery, Cochin, Kerala, 682022, India
| | - Rinu Madhu Puthusseri
- Department of Biotechnology, Cochin University of Science and Technology, Kalamassery, Cochin, Kerala, 682022, India
| | - Sarita Ganapathy Bhat
- Department of Biotechnology, Cochin University of Science and Technology, Kalamassery, Cochin, Kerala, 682022, India.
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Puthusseri RM, Nair HP, Johny TK, Bhat SG. Insights into the response of mangrove sediment microbiomes to heavy metal pollution: Ecological risk assessment and metagenomics perspectives. J Environ Manage 2021; 298:113492. [PMID: 34385112 DOI: 10.1016/j.jenvman.2021.113492] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 08/03/2021] [Accepted: 08/05/2021] [Indexed: 06/13/2023]
Abstract
Rapid urbanisation and ensuing anthropogenic pollution lead to an escalated occurrence of heavy metals and metal-resistant bacteria in the soil ecosystem. Mangrove ecosystems are particularly vulnerable to heavy metal bioaccumulation and often act as metal sinks of the coastal areas. As a consequence, the microbial population in mangrove sediments develop multifarious metal tolerance mechanisms to combat metal toxicity. In this context, metagenomic investigation of two mangroves, viz. Mangalavanam and Puthuvypin from the heavily populated metropolitan city, Cochin (Central Kerala, India) was undertaken to discern the metal resistance functions and taxonomic diversity of the microbial consortia. Estimation of heavy metal content using Inductively Coupled Plasma Atomic Emission Spectrometer (ICP-MS) identified the abundance of zinc, chromium, nickel copper, lead, arsenic, and cadmium in the mangrove sediments. Ecological risk index values indicated high cadmium contamination of the two estuarine samples. Whole metagenome shotgun sequencing of the Central Kerala mangroves and comparative analysis with mangrove metal resistomes from other geographical regions revealed the prevalence of cobalt-zinc-cadmium resistance and preponderance of Proteobacteria in all the datasets. Cation efflux system protein CusA constituted the majority of the reads at the function level. Comparative analysis of taxonomy identified the dominance of Anaeromyxobacter, Geobacter, Pseudomonas, Candidatus Solibacter, and Pelobacter in the mangrove datasets. Non-metric multidimensional scaling analysis of the metal resistance genes depicted strong geographical clustering of the function and composition of metal resistant bacteria, suggesting a strong innate resilience of microbiome towards anthropogenic perturbations. More robust studies with intensive sampling will enhance our understanding of the occurrence, interactions, and functions of microbial heavy metal resistome in mangrove ecosystems.
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Affiliation(s)
- Rinu Madhu Puthusseri
- Department of Biotechnology, Cochin University of Science and Technology, Cochin, 682022, India.
| | - Harisree Paramel Nair
- School of Life Science, Faculty of Science and Engineering, Anglia Ruskin University, East Road, Cambridge Campus, East Rd, Cambridge, CB1 1PT, UK.
| | - Tina Kollannoor Johny
- Department of Biotechnology, Cochin University of Science and Technology, Cochin, 682022, India.
| | - Sarita Ganapathy Bhat
- Department of Biotechnology, Cochin University of Science and Technology, Cochin, 682022, India.
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Saidumohamed BE, Baburaj AP, Johny TK, Sheela UB, Sreeranganathan M, Bhat SG. A magainin-2 like bacteriocin BpSl14 with anticancer action from fish gut Bacillus safensis SDG14. Anal Biochem 2021; 627:114261. [PMID: 34043980 DOI: 10.1016/j.ab.2021.114261] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Revised: 05/17/2021] [Accepted: 05/20/2021] [Indexed: 11/18/2022]
Abstract
Bacteriocins are gaining utmost importance in antimicrobial and chemotherapy due to their diverse structure and activity. This study centres on magainin-2 like bacteriocin with anticancer action, produced by Bacillus safensis strain SDG14 isolated from gut of marine fish Sardinella longiceps. The purified bacteriocin designated as BpSl14 was thermostable and pH tolerant. The molecular weight of BpS114 was estimated to be 6061.2 Da using MALDI-ToF MS. The partial primary sequence was elucidated by peptide mass fingerprinting using MALDI MS/MS. The tertiary structure of the partial sequence was similar to that of two magainin-2 α-helices joined together by extended indolicidin. The BpSl14 protein inhibited the cells of lung carcinoma, one of the deadliest cancers. Docking studies conducted with DR5 and TGF-β, two of the most prominent apoptotic receptors in adenocarcinoma, also proved the anti-apoptotic action of BpSl14.
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Affiliation(s)
| | | | - Tina Kollannoor Johny
- Department of Biotechnology, Cochin University of Science and Technology, Cochin, 22, Kerala, India
| | | | - Maya Sreeranganathan
- Division of Cancer Research, Regional Cancer Centre, Thiruvananthapuram, 695011, Kerala, India
| | - Sarita Ganapathy Bhat
- Department of Biotechnology, Cochin University of Science and Technology, Cochin, 22, Kerala, India.
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Johny TK, Saidumohamed BE, Sasidharan RS, Bhat SG. Inferences of gut bacterial diversity from next-generation sequencing of 16S rDNA in deep sea blind ray - Benthobatis moresbyi. ACTA ACUST UNITED AC 2018. [DOI: 10.1016/j.egg.2018.07.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Johny TK, Saidumohamed BE, Sasidharan RS, Bhat SG. Metabarcoding data of bacterial diversity of the deep sea shark, Centroscyllium fabricii. Data Brief 2018; 21:1029-1032. [PMID: 30450395 PMCID: PMC6226572 DOI: 10.1016/j.dib.2018.10.062] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Revised: 03/06/2018] [Accepted: 10/17/2018] [Indexed: 12/04/2022] Open
Abstract
This data article describes the bacterial diversity of the deep sea shark, Centroscyllium fabricii. The data was acquired by metabarcoding using 16S rDNA. Centroscyllium fabricii, a deep sea shark found at depths below 275 m was sampled during Sagar Sampada cruise no 305 in the Indian Ocean and metagenomic DNA was isolated from the gut contents using QIAamp DNA stool minikit. V3 region of 16S rDNA region was amplified and the amplicons were sequenced on Illumina MiSeq system using 151 bp × 2 paired end reads. The data of this metagenome is available in the BioSample Submission Portal as Bio-Project PRJNA431407and Sequence Read Archive (SRA) accession number SRR6507004.
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Affiliation(s)
- Tina Kollannoor Johny
- Department of Biotechnology, Cochin University of Science and Technology, Kalamassery, Cochin 682022, Kerala, India
| | | | - Raghul Subin Sasidharan
- Department of Biotechnology, Cochin University of Science and Technology, Kalamassery, Cochin 682022, Kerala, India
| | - Sarita Ganapathy Bhat
- Department of Biotechnology, Cochin University of Science and Technology, Kalamassery, Cochin 682022, Kerala, India
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