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Sarma A, Dhandapani G, Phukan H, Bhunia PK, De AK, Bhattacharya D, Jebasingh T, Madanan MG. Leptospiral cell wall hydrolase (LIC_10271) binding peptidoglycan, lipopolysaccharide, and laminin and the protein show LysM and M23 domains are co-existing in pathogenic species. Res Microbiol 2023; 174:104107. [PMID: 37517629 DOI: 10.1016/j.resmic.2023.104107] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 07/07/2023] [Accepted: 07/21/2023] [Indexed: 08/01/2023]
Abstract
Leptospirosis, a global reemerging zoonosis caused by the spirochete Leptospira, has severe human and veterinary implications. Cell wall hydrolase (LIC_10271) with LytM (peptidase M23) and LysM domains are found to be associated with various pathogenic bacteria. These domains regulate effects on extracellular matrix and biofilm components, which promote cell wall remodeling and pathogen dissemination in the host. In this study, we present the cloning, expression, purification, and characterization of LIC_10271. To determine the localization of LIC_10271 within the inner membrane of Leptospira, Triton X-114 subcellular fractionation and immunoblot studies were performed. Furthermore, r-LIC_10271 binds with peptidoglycan, lipopolysaccharide, and laminin in a dose-dependent manner. Analysis of the signal peptide, M23, and LysM domains revealed conservation primarily within the P1 group of Leptospira, which encompasses the most pathogenic species. Moreover, the presence of native-LIC_10271 in the inner membrane and the distribution of M23 and LysM domains across pathogenic strains indicates their potential involvement in the interaction between the host and Leptospira.
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Affiliation(s)
- Abhijit Sarma
- Department of Biochemistry, ICMR - Regional Medical Research Centre, Port Blair 744103, Andaman and Nicobar Islands, India
| | - Gunasekaran Dhandapani
- Department of Biochemistry, ICMR - Regional Medical Research Centre, Port Blair 744103, Andaman and Nicobar Islands, India
| | - Homen Phukan
- Department of Biochemistry, ICMR - Regional Medical Research Centre, Port Blair 744103, Andaman and Nicobar Islands, India
| | - Prasun Kumar Bhunia
- Department of Plant Sciences, School of Biological Sciences, Madurai Kamraj University, Madurai, Tamil Nadu 625021, India
| | - Arun Kumar De
- Division of Animal Science, ICAR- Central Island Agricultural Research Institute, Port Blair, Andaman and Nicobar Islands 744101, India
| | - Debasis Bhattacharya
- Division of Animal Science, ICAR- Central Island Agricultural Research Institute, Port Blair, Andaman and Nicobar Islands 744101, India
| | - T Jebasingh
- Department of Plant Sciences, School of Biological Sciences, Madurai Kamraj University, Madurai, Tamil Nadu 625021, India
| | - Madathiparambil G Madanan
- Department of Biochemistry, ICMR - Regional Medical Research Centre, Port Blair 744103, Andaman and Nicobar Islands, India.
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Thoduvayil S, Dhandapani G, Brahma R, Devasahayam Arokia Balaya R, Mangalaparthi KK, Patel K, Kumar M, Tennyson J, Satheeshkumar PK, Kulkarni MJ, Pinto SM, Prasad TSK, Madanan MG. Triton X-114 Fractionated Subcellular Proteome of Leptospira interrogans Shows Selective Enrichment of Pathogenic and Outer Membrane Proteins in the Detergent Fraction. Proteomics 2020; 20:e2000170. [PMID: 32846045 DOI: 10.1002/pmic.202000170] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [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: 06/26/2020] [Revised: 07/30/2020] [Indexed: 12/28/2022]
Abstract
The Triton X-114-based solubilization and temperature-dependent phase separation of proteins is used for subcellular fractionation where, aqueous, detergent, and pellet fractions represents cytoplasmic, outer membrane (OM), and inner membrane proteins, respectively. Mass spectrometry-based proteomic analysis of Triton X-114 fractions of proteomic analysis of Leptospira interrogans identified 2957 unique proteins distributed across the fractions. The results are compared with bioinformatics predictions on their subcellular localization and pathogenic nature. Analysis of the distribution of proteins across the Triton X-114 fractions with the predicted characteristics is performed based on "number" of unique type of proteins, and "quantity" which represents the amount of unique protein. The highest number of predicted outer membrane proteins (OMPs) and pathogenic proteins are found in aqueous and pellet fractions, whereas detergent fraction representing the OM has the highest quantity of OMPs and pathogenic proteins though lower in number than the aqueous and pellet fractions. This leaves the possibility of an upsurge in pathogenic proteins and OMPs on the OM under pathogenic conditions suggesting their potential use to combat leptospirosis. Further, the Triton X-114 subcellular fractions are more correlated to enrichment of pathogenic proteins predicted by MP3 software than predicted localization.
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Affiliation(s)
- Sikha Thoduvayil
- Indian Council of Medical Research, Regional Medical Research Centre Port Blair, Dollygunj, Port Blair, 744103, India.,Department of Pathology, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, 605006, India
| | - Gunasekaran Dhandapani
- Indian Council of Medical Research, Regional Medical Research Centre Port Blair, Dollygunj, Port Blair, 744103, India.,Department of Chemical Sciences, Ariel University, Ariel, 70400, Israel
| | - Rahul Brahma
- Indian Council of Medical Research, Regional Medical Research Centre Port Blair, Dollygunj, Port Blair, 744103, India
| | - Rex Devasahayam Arokia Balaya
- Center for Systems Biology and Molecular Medicine, Yenepoya Research Centre, Yenepoya (Deemed to be University), Mangaluru, 575018, India
| | - Kiran K Mangalaparthi
- Institute of Bioinformatics, International Technology Park, Bengaluru, 560066, India.,NIMHANS-IOB Proteomics and Bioinformatics Laboratory, Neurobiology Research Centre, National Institute of Mental Health and Neurosciences, Bengaluru, 560029, India
| | - Krishna Patel
- Institute of Bioinformatics, International Technology Park, Bengaluru, 560066, India.,Amrita School of Biotechnology, Amrita Vishwa Vidyapeetham, Kollam, 690525, India
| | - Manish Kumar
- Institute of Bioinformatics, International Technology Park, Bengaluru, 560066, India.,Manipal Academy of Higher Education, Manipal, 576104, India
| | - Jebasingh Tennyson
- School of Biological Sciences, Madurai Kamaraj University, Madurai, 625021, India
| | - P K Satheeshkumar
- Department of Botany, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - Mahesh J Kulkarni
- Biochemical Sciences Division, CSIR-National Chemical Laboratory, Pune, 411008, India
| | - Sneha M Pinto
- Center for Systems Biology and Molecular Medicine, Yenepoya Research Centre, Yenepoya (Deemed to be University), Mangaluru, 575018, India.,Institute of Bioinformatics, International Technology Park, Bengaluru, 560066, India
| | - T S Keshava Prasad
- Center for Systems Biology and Molecular Medicine, Yenepoya Research Centre, Yenepoya (Deemed to be University), Mangaluru, 575018, India.,Institute of Bioinformatics, International Technology Park, Bengaluru, 560066, India.,NIMHANS-IOB Proteomics and Bioinformatics Laboratory, Neurobiology Research Centre, National Institute of Mental Health and Neurosciences, Bengaluru, 560029, India
| | - Madathiparambil G Madanan
- Indian Council of Medical Research, Regional Medical Research Centre Port Blair, Dollygunj, Port Blair, 744103, India
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Anu PV, Madanan MG, Nair AJ, Nair GA, Nair GPM, Sudhakaran PR, Satheeshkumar PK. Heterologous Expression, Purification and Characterization of an Oligopeptidase A from the Pathogen Leptospira interrogans. Mol Biotechnol 2018; 60:302-309. [PMID: 29502205 DOI: 10.1007/s12033-018-0073-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Oligopeptidases are enzymes involved in the degradation of short peptides (generally less than 30 amino acids in size) which help pathogens evade the host defence mechanisms. Leptospira is a zoonotic pathogen and causes leptospirosis in mammals. Proteome analysis of Leptospira revealed the presence of oligopeptidase A (OpdA) among other membrane proteins. To study the role of oligopeptidase in leptospirosis, the OpdA of L. interrogans was cloned and expressed in Escherichia coli with a histidine tag (His-tag). The protein showed maximum expression at 37 °C with 0.5 mM of IPTG after 2 h of induction. Recombinant OpdA protein was purified to homogeneity using Ni-affinity chromatography. The purified OpdA showed more than 80% inhibition with a serine protease inhibitor but the activity was reduced to 30% with the cysteine protease inhibitor. The peptidase activity was increased significantly in the presence of Zn2+ at a neutral pH. Inhibitor assay indicate the presence of more than one active sites for peptidase activity as reported with the OpdA of E. coli and Salmonella. Over-expression of OpdA in E. coli BL21 (DE3) did not cause any negative effects on normal cell growth and viability. The role of OpdA as virulence factor in Leptospira and its potential as a therapeutic and diagnostic target in leptospirosis is yet to be identified.
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Affiliation(s)
- Prasannan V Anu
- Department of Biotechnology, Interuniversity Centre for Genomics and Gene Technology, University of Kerala, Trivandrum, Kerala, India
| | | | - Ananthakrishnan J Nair
- Department of Biotechnology, Interuniversity Centre for Genomics and Gene Technology, University of Kerala, Trivandrum, Kerala, India
| | - Gangaprasad A Nair
- Department of Biotechnology, Interuniversity Centre for Genomics and Gene Technology, University of Kerala, Trivandrum, Kerala, India
| | - Govinda Pillai M Nair
- Department of Biotechnology, Interuniversity Centre for Genomics and Gene Technology, University of Kerala, Trivandrum, Kerala, India
| | - Perumana R Sudhakaran
- Department of Biotechnology, Interuniversity Centre for Genomics and Gene Technology, University of Kerala, Trivandrum, Kerala, India
| | - Padikara K Satheeshkumar
- Department of Biotechnology, Interuniversity Centre for Genomics and Gene Technology, University of Kerala, Trivandrum, Kerala, India. .,Centre for Advanced Studies in Botany, Institute of Science, Banaras Hindu University, Varanasi, UP, India.
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Mehrotra P, Ramakrishnan G, Dhandapani G, Srinivasan N, Madanan MG. Comparison of Leptospira interrogans and Leptospira biflexa genomes: analysis of potential leptospiral-host interactions. Mol Biosyst 2018; 13:883-891. [PMID: 28294222 DOI: 10.1039/c6mb00856a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Leptospirosis, a potentially life-threatening disease, remains the most widespread zoonosis caused by pathogenic species of Leptospira. The pathogenic spirochaete, Leptospira interrogans, is characterized by its ability to permeate human host tissues rapidly and colonize multiple organs in the host. In spite of the efforts taken to comprehend the pathophysiology of the pathogen and the heterogeneity posed by L. interrogans, the current knowledge on the mechanism of pathogenesis is modest. In an attempt to contribute towards the same, we demonstrate the use of an established structure-based protocol coupled with information on subcellular localization of proteins and their tissue-specificity, in recognizing a set of 49 biologically feasible interactions potentially mediated by proteins of L. interrogans in humans. We have also presented means to adjudge the physicochemical viability of the predicted host-pathogen interactions, for selected cases, in terms of interaction energies and geometric shape complementarity of the interacting proteins. Comparative analyses of proteins of L. interrogans and the saprophytic spirochaete, Leptospira biflexa, and their predicted involvement in interactions with human hosts, aided in underpinning the functional relevance of leptospiral-host protein-protein interactions specific to L. interrogans as well as those specific to L. biflexa. Our study presents characteristics of the pathogenic L. interrogans that are predicted to facilitate its ability to persist in human hosts.
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Affiliation(s)
- Prachi Mehrotra
- Indian Institute of Science Mathematics Initiative, Indian Institute of Science, Bangalore 560012, India
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Satheeshkumar PK, Anu PV, Junaida MI, Madanan MG, Jebasingh T, Nair AJ, Nair GA, Nair GPM, Sudhakaran PR. Expression of Leptospira membrane proteins Signal Peptidase (SP) and Leptospira Endostatin like A (Len A) in BL-21(DE3) is toxic to the host cells. J Genet Eng Biotechnol 2018; 16:393-398. [PMID: 30733752 PMCID: PMC6353657 DOI: 10.1016/j.jgeb.2018.01.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Revised: 01/18/2018] [Accepted: 01/24/2018] [Indexed: 02/06/2023]
Abstract
Heterologous expression of Integral Membrane Proteins (IMPs) is reported to be toxic to the host system in many studies. Even though there are reports on various concerns like transformation efficiency, growth properties, protein toxicity, inefficient expression and protein degradation in IMP overexpression, no studies so far addressed these issues in a comprehensive way. In the present study, two transmembrane proteins of the pathogen Leptospira interrogans, namely Signal peptidase (SP), and Leptospira Endostatin like A (Len-A) were taken along with a cytosolic protein Hydrolase (HYD) to assess the differences in transformation efficiency, protein toxicity, and protein stability when over expressed in Escherichia coli (E. coli). Bioinformatics analysis to predict the transmembrane localization indicated that both SP and Len are targeted to the membrane. The three proteins were expressed in full length in the E. coli expression strain, BL 21 (DE3). Significant changes were observed for the strains transformed with IMP genes under the parameters analysed such as, the transformation efficiency, survival of colonies on IPTG-plate, culture growth kinetics and protein expression compared to the strain harbouring the cytosolic protein gene.
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Affiliation(s)
- Padikara K Satheeshkumar
- Interuniversity Centre for Genomics and Gene Technology, Department of Biotechnology, University of Kerala, Trivandrum, Kerala, India
| | - Prasannan V Anu
- Interuniversity Centre for Genomics and Gene Technology, Department of Biotechnology, University of Kerala, Trivandrum, Kerala, India
| | - Mohmed I Junaida
- Interuniversity Centre for Genomics and Gene Technology, Department of Biotechnology, University of Kerala, Trivandrum, Kerala, India
| | | | | | - Ananthakrishnan J Nair
- Interuniversity Centre for Genomics and Gene Technology, Department of Biotechnology, University of Kerala, Trivandrum, Kerala, India
| | - Gangaprasad A Nair
- Interuniversity Centre for Genomics and Gene Technology, Department of Biotechnology, University of Kerala, Trivandrum, Kerala, India
| | - Govinda Pillai M Nair
- Interuniversity Centre for Genomics and Gene Technology, Department of Biotechnology, University of Kerala, Trivandrum, Kerala, India
| | - Perumana R Sudhakaran
- Interuniversity Centre for Genomics and Gene Technology, Department of Biotechnology, University of Kerala, Trivandrum, Kerala, India
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Abstract
Proteinases play a crucial role in invasion and pathogenesis of bacteria, especially the extracellular and membrane-bound forms. Analysis of these proteinases demands the isolation by retaining the enzymatic activity. The isolation procedures maintaining the native structure of the enzyme in its soluble form are also of extreme importance. The qualitative analyses of these proteinases are carried out by electrophoresis and zymography. Enzymatic characterization based on the effect of inhibitors and activators on gelatinase activity also can be assessed using this zymography. The membrane-bound proteinases can be isolated in their native and soluble form, still retaining the activity using 6-aminocaproic acid and sodium deoxycholate; the procedure of which is explained in this chapter.
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Affiliation(s)
- Madathiparambil G Madanan
- Regional Medical Research Centre, Indian Council of Medical Research, Port Blair, 744103, Andaman & Nicobar Islands, India.
| | - Ambili Mechoor
- Department of Biotechnology Engineering, Sahrdaya College of Engineering and Technology, Kodakara, Thrissur, 680684, Kerala, India
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