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Sharma N, Patel SN, Rai AK, Singh SP. Biochemical characterization of a novel acid-active endopolygalacturonase for pectin depolymerization, pectic-oligomer production, and fruit juice clarification. Int J Biol Macromol 2024; 267:131565. [PMID: 38614184 DOI: 10.1016/j.ijbiomac.2024.131565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Revised: 03/18/2024] [Accepted: 04/10/2024] [Indexed: 04/15/2024]
Abstract
Endopolygalacturonases are crucial pectinases known for their efficient and sustainable pectin depolymerization activities. The present study identified a novel gene encoding endopolygalacturonase from an acidic mine tailing metagenome. The putative gene showed a maximum identity of 67.55 % with an uncharacterized peptide sequence from Flavobacterium fluvii. The gene was cloned and expressed in a heterologous host, E. coli. Biochemical characterization of the novel endopolygalacturonase enzyme variant (EPHM) showed maximum activity at 60 °C and at 5.0 pH, while retaining 50 % activity under the temperature and pH range of 20 °C to 70 °C for 6 h, and 3.0 to 10.0 for 3 h, respectively. The enzyme exhibited tolerance to different metal ions. EPHM was characterized for the depolymerization of methylated pectin into pectic oligosaccharides. Further, its utility was established for fruit juice clarification, as endorsed by high transmittance, significant viscosity reduction, and release of reducing sugars in the treated fruit juice samples.
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Affiliation(s)
- Nitish Sharma
- Center of Innovative and Applied Bioprocessing, Biotechnology Research and Innovation Council (Department of Biotechnology, Government of India), NABI, SAS Nagar, Sector 81, Mohali, India
| | - Satya N Patel
- Center of Innovative and Applied Bioprocessing, Biotechnology Research and Innovation Council (Department of Biotechnology, Government of India), NABI, SAS Nagar, Sector 81, Mohali, India
| | - Amit Kumar Rai
- National Agri-Food Biotechnology Institute, Biotechnology Research and Innovation Council (Department of Biotechnology, Government of India), SAS Nagar, Sector 81, Mohali, India
| | - Sudhir P Singh
- Center of Innovative and Applied Bioprocessing, Biotechnology Research and Innovation Council (Department of Biotechnology, Government of India), NABI, SAS Nagar, Sector 81, Mohali, India.
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Lu B, Xian L, Zhu J, Wei Y, Yang C, Cheng Z. A Novel Endo-Polygalacturonase from Penicillium oxalicum: Gene Cloning, Heterologous Expression and Its Use in Acidic Fruit Juice Extraction. J Microbiol Biotechnol 2022; 32:464-472. [PMID: 35001012 PMCID: PMC9628815 DOI: 10.4014/jmb.2112.12023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 12/31/2021] [Accepted: 01/05/2022] [Indexed: 12/15/2022]
Abstract
An endo-polygalacturonase (endo-PGase) exhibiting excellent performance during acidic fruit juice production would be highly attractive to the fruit juice industry. However, candidate endo-PGases for this purpose have rarely been reported. In this study, we expressed a gene from Penicillium oxalicum in Pichia pastoris. The recombinant enzyme PoxaEnPG28C had an optimal enzyme activity at pH 4.5 and 45°C and was stable at pH 3.0-6.5 and < 45°C. The enzyme had a specific activity of 4,377.65 ± 55.37 U/mg towards polygalacturonic acid, and the Km and Vmax values of PoxaEnPG28C were calculated as 1.64 g/l and 6127.45 U/mg, respectively. PoxaEnPG28C increased the light transmittance of orange, lemon, strawberry and hawthorn juice by 13.9 ± 0.3%, 29.4 ± 3.8%, 95.7 ± 10.2% and 79.8 ± 1.7%, respectively; it reduced the viscosity of the same juices by 25.7 ± 1.6%, 52.0 ± 4.5%, 48.2 ± 0.7% and 80.5 ± 2.3%, respectively, and it increased the yield of the juices by 24.5 ± 0.7%, 12.7 ± 2.2%, 48.5 ± 4.2% and 104.5 ± 6.4%, respectively. Thus, PoxaEnPG28C could be considered an excellent candidate enzyme for acidic fruit juice production. Remarkably, fruit juice production using hawthorn as an material was reported for the first time.
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Affiliation(s)
- Bo Lu
- National Engineering Research Center for Non-Food Biorefinery, Guangxi Key Laboratory of Biorefinery, Guangxi Academy of Sciences, 98 Daling Road, Nanning, Guangxi 530007, P.R. China
| | - Liang Xian
- National Engineering Research Center for Non-Food Biorefinery, Guangxi Key Laboratory of Biorefinery, Guangxi Academy of Sciences, 98 Daling Road, Nanning, Guangxi 530007, P.R. China
| | - Jing Zhu
- Nanning University, 8 Longting Road, Nanning, Guangxi 530200, P.R. China
| | - Yunyi Wei
- Nanning University, 8 Longting Road, Nanning, Guangxi 530200, P.R. China
| | - Chengwei Yang
- Nanning University, 8 Longting Road, Nanning, Guangxi 530200, P.R. China
| | - Zhong Cheng
- Nanning University, 8 Longting Road, Nanning, Guangxi 530200, P.R. China,Corresponding author Phone: +86-771-5900891 Fax: +86-771-5900885 E-mail:
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Rafique N, Bashir S, Khan MZ, Hayat I, Orts W, Wong DWS. Metabolic engineering of Bacillus subtilis with an endopolygalacturonase gene isolated from Pectobacterium. carotovorum; a plant pathogenic bacterial strain. PLoS One 2021; 16:e0256562. [PMID: 34936645 PMCID: PMC8694468 DOI: 10.1371/journal.pone.0256562] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2021] [Accepted: 11/20/2021] [Indexed: 12/02/2022] Open
Abstract
Pectinolytic enzymes or pectinases are synthesized naturally by numerous microbes and plants. These enzymes degrade various kinds of pectin which exist as the major component of the cell wall in plants. A pectinase gene encoding endo-polygalacturonase (endo-PGase) enzyme was isolated from Pectobacterium carotovorum a plant pathogenic strain of bacteria and successfully cloned into a secretion vector pHT43 having σA-dependent promoter for heterologous expression in Bacillus subtilis (WB800N).The desired PCR product was 1209bp which encoded an open reading frame of 402 amino acids. Recombinant proteins showed an estimated molecular weight of 48 kDa confirmed by sodium dodecyl sulphate–polyacrylamide-gel electrophoresis. Transformed B. subtilis competent cells harbouring the engineered pHT43 vector with the foreign endo-PGase gene were cultured in 2X-yeast extract tryptone medium and subsequently screened for enzyme activity at various temperatures and pH ranges. Optimal activity of recombinant endo-PGase was found at 40°C and pH 5.0. To assay the catalytic effect of metal ions, the recombinant enzyme was incubated with 1 mM concentration of various metal ions. Potassium chloride increased the enzyme activity while EDTA, Zn++ and Ca++, strongly inhibited the activity. The chromatographic analysis of enzymatic hydrolysates of polygalacturonic acid (PGA) and pectin substrates using HPLC and TLC revealed tri and tetra-galacturonates as the end products of recombinant endo-PGase hydrolysis. Conclusively, endo-PGase gene from the plant pathogenic strain was successfully expressed in Bacillus subtilis for the first time using pHT43 expression vector and could be assessed for enzyme production using a very simple medium with IPTG induction. These findings proposed that the Bacillus expression system might be safer to escape endotoxins for commercial enzyme production as compared to yeast and fungi. Additionally, the hydrolysis products generated by the recombinant endo-PGase activity offer their useful applications in food and beverage industry for quality products.
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Affiliation(s)
- Nagina Rafique
- Department of Food Science and Technology, Faculty of Agriculture, University of the Poonch, Rawalakot, Azad Jammu and Kashmir, Pakistan
- Bioproducts Research Unit, Western Regional Research Centre, United States Department of Agriculture, Albany, California, United States of America
| | - Saiqa Bashir
- Department of Food Science and Technology, Faculty of Agriculture, University of the Poonch, Rawalakot, Azad Jammu and Kashmir, Pakistan
| | - Muhammad Zubair Khan
- Department of Plant Breeding and Molecular Genetics, Faculty of Agriculture, University of Poonch Rawalakot, Azad Jammu and Kashmir, Pakistan
- * E-mail:
| | - Imran Hayat
- Department of Food Science and Technology, Faculty of Agriculture, University of the Poonch, Rawalakot, Azad Jammu and Kashmir, Pakistan
| | - Willium Orts
- Bioproducts Research Unit, Western Regional Research Centre, United States Department of Agriculture, Albany, California, United States of America
| | - Dominic W. S. Wong
- Bioproducts Research Unit, Western Regional Research Centre, United States Department of Agriculture, Albany, California, United States of America
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Ganesh PS, Vishnupriya S, Vadivelu J, Mariappan V, Vellasamy KM, Shankar EM. Intracellular survival and innate immune evasion of Burkholderia cepacia: Improved understanding of quorum sensing-controlled virulence factors, biofilm, and inhibitors. Microbiol Immunol 2020; 64:87-98. [PMID: 31769530 DOI: 10.1111/1348-0421.12762] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Revised: 11/18/2019] [Accepted: 11/21/2019] [Indexed: 12/25/2022]
Abstract
Burkholderia cepacia complex (Bcc) are opportunistic pathogens implicated with nosocomial infections, and high rates of morbidity and mortality, especially in individuals with cystic fibrosis (CF). B. cepacia are naturally resistant to different classes of antibiotics, and can subvert the host innate immune responses by producing quorum sensing (QS) controlled virulence factors and biofilms. It still remains a conundrum as to how exactly the bacterium survives the intracellular environment within the host cells of CF patients and immunocompromised individuals although the bacterium can invade human lung epithelial cells, neutrophils, and murine macrophages. The mechanisms associated with intracellular survival in the airway epithelial cells and the role of QS and virulence factors in B. cepacia infections in cystic fibrosis remain largely unclear. The current review focuses on understanding the role of QS-controlled virulence factors and biofilms, and provides additional impetus to understanding the potentials of QS-inhibitory strategies against B. cepacia.
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Affiliation(s)
- Pitchaipillai Sankar Ganesh
- Division of Infection Biology & Medical Microbiology, Department of Life Sciences, School of Life Sciences, Central University of Tamil Nadu, Thiruvarur, India
| | - Sivakumar Vishnupriya
- Division of Infection Biology & Medical Microbiology, Department of Life Sciences, School of Life Sciences, Central University of Tamil Nadu, Thiruvarur, India
| | - Jamuna Vadivelu
- Department of Medical Microbiology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Vanitha Mariappan
- Department of Medical Microbiology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Kumutha M Vellasamy
- Department of Medical Microbiology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Esaki M Shankar
- Division of Infection Biology & Medical Microbiology, Department of Life Sciences, School of Life Sciences, Central University of Tamil Nadu, Thiruvarur, India
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Adalberto PR, Golfeto CC, Moreira AC, Almeida FG, Ferreira D, Cass QB, Souza DHF. Characterization of an Exopolygalacturonase from <i>Leucoagaricus gongylophorus</i>, the Symbiotic Fungus of <i>Atta sexdens</i>. ACTA ACUST UNITED AC 2016. [DOI: 10.4236/aer.2016.41002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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6
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Li K, Meng K, Pan X, Ma R, Yang P, Huang H, Yao B, Su X. Two thermophilic fungal pectinases from Neosartorya fischeri P1: Gene cloning, expression, and biochemical characterization. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.molcatb.2015.05.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Massa C, Guarnaccia C, Lamba D, Anselmi C. Insight into the structure of an endopolygalacturonase from the phytopathogen Burkholderia cepacia: a biochemical and computational study. Biochimie 2010; 92:1445-53. [PMID: 20637827 DOI: 10.1016/j.biochi.2010.07.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2010] [Accepted: 07/07/2010] [Indexed: 11/30/2022]
Abstract
We have recently investigated and characterized the mode of action of BcPeh28A, an endopolygalacturonase (endoPG) from the phytopathogen Burkholderia cepacia. EndoPGs belong to glycoside hydrolase family 28 and are responsible for the hydrolysis of the non-esterified regions of pectins. Here we report a 3-D structural model of BcPeh28A by combining mass spectrometry (MS) analysis, aimed at disulphide bridges mapping, and computational modelling tools. MS analyses have revealed the complete pattern of disulphide bridges in BcPeh28A, pointing out the presence of three disulphide bonds, defined as Cys3-25, Cys216-244 and Cys309-421. A 3-D model of BcPeh28A was generated by computational methods based on profile-profile sequence alignments and fold recognition algorithms. The final model exhibits a right-handed β-helix fold with eleven β-helical coils and includes the disulphide bonds as additional spatial restraints. Molecular dynamics simulations have been performed to test the conformational stability of the model. Finally, the structural analysis of the BcPeh28A model allows defining the architecture and the amino acid topology of the subsites involved in the catalysis and in the substrate binding specificity.
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Affiliation(s)
- Claudia Massa
- Structural Biology Laboratory, Sincrotrone Trieste S.C.p.A., AREA Science Park - Basovizza Strada Statale 14, km 163,5, I-34149 Trieste, Italy.
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Swain MR, Ray RC. Production, Characterization and Application of a Thermostable Exo-polygalacturonase byBacillus subtilisCM5. FOOD BIOTECHNOL 2010. [DOI: 10.1080/08905430903320958] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Veselova M, Lipasova V, Protsenko MA, Buza N, Khmel IA. GacS-dependent regulation of enzymic and antifungal activities and synthesis of N-acylhomoserine lactones in rhizospheric strain Pseudomonas chlororaphis 449. Folia Microbiol (Praha) 2009; 54:401-8. [PMID: 19937212 DOI: 10.1007/s12223-009-0056-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2008] [Revised: 04/17/2009] [Indexed: 11/24/2022]
Abstract
Pseudomonas chlororaphis strain 449 isolated from the rhizosphere of maize suppresses numerous plant pathogens in vitro. The strain produces phenazine antibiotics and synthesizes at least three types of quorum sensing signaling molecules, N-acylhomoserine lactones. Here we have shown that the rhizospheric P. chlororaphis strains 449, well known strain 30-84 as well as two other P. chlororaphis strains exhibit polygalacturonase activity. Using mini-Tn5 transposon mutagenesis, four independent mutants of strain P. chlororaphis 449 with insertion of mini-Tn5 Km2 in gene gacS of two-component GacA-GacS system of global regulation were selected. All these mutant strains were deficient in production of extracellular proteinase(s), phenazines, N-acylhomoserine lactones synthesis, and did not inhibit the growth of G(+) bacteria in comparison with the wild type strain. The P. chlororaphis 449-06 gacS (-) mutant studied in greater detail was deficient in polygalacturonase, pectin methylesterase activities, swarming motility and antifungal activity. It is the first time the involvement of GacA-GacS system in the regulation of enzymes of pectin metabolism, polygalacturonase and pectin methylesterase, was demonstrated in fluorescent pseudomonads.
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Affiliation(s)
- M Veselova
- Institute of Molecular Genetics, Russian Academy of Sciences, Moscow, Russia
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Degrassi G, Devescovi G, Kim J, Hwang I, Venturi V. Identification, characterization and regulation of two secreted polygalacturonases of the emerging rice pathogen Burkholderia glumae. FEMS Microbiol Ecol 2008; 65:251-62. [DOI: 10.1111/j.1574-6941.2008.00516.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Massa C, Clausen MH, Stojan J, Lamba D, Campa C. Study of the mode of action of a polygalacturonase from the phytopathogen Burkholderia cepacia. Biochem J 2008; 407:207-17. [PMID: 17627609 PMCID: PMC2049012 DOI: 10.1042/bj20061833] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
We have recently isolated and heterologously expressed BcPeh28A, an endopolygalacturonase from the phytopathogenic Gram-negative bacterium Burkholderia cepacia. Endopolygalacturonases belong to glycoside hydrolase family 28 and are responsible for the hydrolysis of the non-esterified regions of pectins. The mode of action of BcPeh28A on different substrates has been investigated and its enzymatic mechanism elucidated. The hydrolysis of polygalacturonate indicates that BcPeh28A is a non-processive enzyme that releases oligomers with chain lengths ranging from two to eight. By inspection of product progression curves, a kinetic model has been generated and extensively tested. It has been used to derive the kinetic parameters that describe the time course of the formation of six predominant products. Moreover, an investigation of the enzymatic activity on shorter substrates that differ in their overall length and methylation patterns sheds light on the architecture of the BcPeh28A active site. Specifically the tolerance of individual sites towards methylated saccharide units was rationalized on the basis of the hydrolysis of hexagalacturonides with different methylation patterns.
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Affiliation(s)
- Claudia Massa
- International School for Advanced Studies, Via Beirut 2/4, I-34014 Trieste, Italy.
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