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Gujjarlapudi M, Kotarya B, Mohanraj SS, Gupta D, Prasad ER, Kalle AM, Jaba J, Ponnusamy D, Padmasree K. Development of a rapid process for purification of Bowman-Birk and Kunitz inhibitors from legume seeds, and evaluation of their biophysical, insecticidal, and antimicrobial properties. Int J Biol Macromol 2023; 238:124050. [PMID: 36933601 DOI: 10.1016/j.ijbiomac.2023.124050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Revised: 03/02/2023] [Accepted: 03/12/2023] [Indexed: 03/18/2023]
Abstract
Bowman-Birk inhibitor (BBI ~10 kDa) and Kunitz inhibitor (KI ~20 kDa) are serine protease/proteinase inhibitor(s) [PI(s)] ubiquitously found in several Leguminous plant species with insecticidal and therapeutic properties. Due to narrow molecular mass differences, the separation of these inhibitors from a single seed variety is tedious. The present study is aimed to develop a rapid protocol (<24 h) for purifying BBI and KI from legume seeds using mild trichloroacetic acid (TCA) extraction followed by trypsin-affinity chromatography. The mature seeds of Vigna radiata and Cajanus platycarpus are used as a model to purify BBI and KI using this protocol. The BBI and KI purified from the seeds of V. radiata are labeled as VrBBI & VrKI, and C. platycarpus are labeled as CpBBI & CpKI, respectively. These PIs are confirmed by immunodetection and MALDI-TOF studies and further characterized for their structural (CD & fluorescence spectroscopy) and functional properties (temperature & DTT stability). BBI(s) purified using the above process are effective in the management of castor semi-looper 'Achaea janata', while KI(s) are effective in the management of pod borer 'Helicoverpa armigera'. Besides, both BBI(s) and KI(s) have significant potential in controlling the growth of methicillin-sensitive 'Staphylococcus aureus', a gram-positive pathogenic bacterium.
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Affiliation(s)
- Mariyamma Gujjarlapudi
- Department of Biotechnology and Bioinformatics, University of Hyderabad, Hyderabad 500 046, India
| | - Bharti Kotarya
- Department of Biotechnology and Bioinformatics, University of Hyderabad, Hyderabad 500 046, India
| | | | - Deepali Gupta
- Department of Biotechnology and Bioinformatics, University of Hyderabad, Hyderabad 500 046, India
| | - Elaprolu R Prasad
- Department of Plant Sciences, University of Hyderabad, Hyderabad 500 046, India
| | - Arunasree M Kalle
- Department of Animal Biology, University of Hyderabad, Hyderabad 500 046, India
| | - Jagdish Jaba
- Entomology, International Crops Research Institute for the Semi-Arid Tropics, Hyderabad 502 324, India
| | - Duraimurugan Ponnusamy
- Crop Protection Section, ICAR-Indian Institute of Oilseeds Research, Hyderabad 500 030, India
| | - Kollipara Padmasree
- Department of Biotechnology and Bioinformatics, University of Hyderabad, Hyderabad 500 046, India.
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do Amaral M, Freitas ACO, Santos AS, Dos Santos EC, Ferreira MM, da Silva Gesteira A, Gramacho KP, Marinho-Prado JS, Pirovani CP. TcTI, a Kunitz-type trypsin inhibitor from cocoa associated with defense against pathogens. Sci Rep 2022; 12:698. [PMID: 35027639 PMCID: PMC8758671 DOI: 10.1038/s41598-021-04700-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Accepted: 12/23/2021] [Indexed: 02/05/2023] Open
Abstract
Protease inhibitors (PIs) are important biotechnological tools of interest in agriculture. Usually they are the first proteins to be activated in plant-induced resistance against pathogens. Therefore, the aim of this study was to characterize a Theobroma cacao trypsin inhibitor called TcTI. The ORF has 740 bp encoding a protein with 219 amino acids, molecular weight of approximately 23 kDa. rTcTI was expressed in the soluble fraction of Escherichia coli strain Rosetta [DE3]. The purified His-Tag rTcTI showed inhibitory activity against commercial porcine trypsin. The kinetic model demonstrated that rTcTI is a competitive inhibitor, with a Ki value of 4.08 × 10-7 mol L-1. The thermostability analysis of rTcTI showed that 100% inhibitory activity was retained up to 60 °C and that at 70-80 °C, inhibitory activity remained above 50%. Circular dichroism analysis indicated that the protein is rich in loop structures and β-conformations. Furthermore, in vivo assays against Helicoverpa armigera larvae were also performed with rTcTI in 0.1 mg mL-1 spray solutions on leaf surfaces, which reduced larval growth by 70% compared to the control treatment. Trials with cocoa plants infected with Mp showed a greater accumulation of TcTI in resistant varieties of T. cacao, so this regulation may be associated with different isoforms of TcTI. This inhibitor has biochemical characteristics suitable for biotechnological applications as well as in resistance studies of T. cacao and other crops.
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Affiliation(s)
- Milena do Amaral
- Universidade Estadual de Santa Cruz, UESC, Rodovia Ilhéus-Itabuna, Km - 16, Ilhéus, BA, CEP 45662-900, Brazil
| | - Ana Camila Oliveira Freitas
- Universidade Estadual de Santa Cruz, UESC, Rodovia Ilhéus-Itabuna, Km - 16, Ilhéus, BA, CEP 45662-900, Brazil
| | - Ariana Silva Santos
- Universidade Estadual de Santa Cruz, UESC, Rodovia Ilhéus-Itabuna, Km - 16, Ilhéus, BA, CEP 45662-900, Brazil.
| | - Everton Cruz Dos Santos
- Instituto Nacional de Câncer José Alencar Gomes da Silva, Rio de Janeiro, RJ, 20230-130, Brazil
| | - Monaliza Macêdo Ferreira
- Universidade Estadual de Santa Cruz, UESC, Rodovia Ilhéus-Itabuna, Km - 16, Ilhéus, BA, CEP 45662-900, Brazil
| | | | - Karina Peres Gramacho
- Centro de Pesquisa do Cacau [CEPEC/CEPLAC] Molecular Plant Pathology Laboratory, Km 22 Rod. Ilhéus-Itabuna, Ilhéus, Bahia, 45600-970, Brazil
| | | | - Carlos Priminho Pirovani
- Universidade Estadual de Santa Cruz, UESC, Rodovia Ilhéus-Itabuna, Km - 16, Ilhéus, BA, CEP 45662-900, Brazil
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Nunes NN, Ferreira RS, de Sá LF, de Oliveira AEA, Oliva MLV. A novel cysteine proteinase inhibitor from seeds of Enterolobium contortisiliquum and its effect on Callosobruchus maculatus larvae. Biochem Biophys Rep 2021; 25:100876. [PMID: 33364447 PMCID: PMC7750491 DOI: 10.1016/j.bbrep.2020.100876] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 10/14/2020] [Accepted: 12/07/2020] [Indexed: 11/28/2022] Open
Abstract
This study focused on the characterization of a novel cysteine proteinase inhibitor from Enterolobium contortisiliquum seeds targeting the inhibition of the growth of Callosobruchus maculatus larvae, an important cosmopolitan pest of the cowpea Vigna unguiculata during storage. The inhibitor was isolated by ion-exchange besides of size exclusion chromatography. EcCI molecular mass is 19,757 Da, composed of two polypeptide chains. It strongly inhibits papain (Kiapp 0.036 nM) and proteinases from the midguts of C. maculatus (80 μg mL-1, 60% inhibition). The inhibitory activity is reduced by 40% after a heat treatment at 100 °C for 2 h. The protein displayed noxious activity at 0.5% and 1% (w/w) when incorporated in artificial seeds, reducing larval mass in 87% and 92%, respectively. Treatment of C. maculatus larvae with conjugated EcCI-FIT and subsequent biodistribution resulted in high fluorescence intensity in midguts and markedly low intensity in malpighian tubules and fat body. Small amounts of labeled proteins were detected in larvae feces. The detection of high fluorescence in larvae midguts and low fluorescence in their feces indicate the retention of the FITC conjugated EcCI inhibitor in larvae midguts. These results demonstrate the potential of the natural protein from E. contortisiliquum to inhibit the development of C. maculatus.
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Affiliation(s)
- Natalia N.S. Nunes
- Biochemistry Department, Universidade Federal de São Paulo-UNIFESP, 04044-020, São Paulo, SP, Brazil
| | - Rodrigo S. Ferreira
- Biochemistry Department, Universidade Federal de São Paulo-UNIFESP, 04044-020, São Paulo, SP, Brazil
| | - Leonardo F.R. de Sá
- Chemistry Laboratory on Chemistry and Function of Proteins and Peptides, Biosciences and Biotechnology Center, CBB, Universidade Estadual do Norte Fluminense Darcy Ribeiro -UENF, Campos dos Goytacazes, RJ, Brazil
| | - Antônia Elenir A. de Oliveira
- Chemistry Laboratory on Chemistry and Function of Proteins and Peptides, Biosciences and Biotechnology Center, CBB, Universidade Estadual do Norte Fluminense Darcy Ribeiro -UENF, Campos dos Goytacazes, RJ, Brazil
| | - Maria Luiza V. Oliva
- Biochemistry Department, Universidade Federal de São Paulo-UNIFESP, 04044-020, São Paulo, SP, Brazil
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In vitro screening of peptidase inhibitory activity in some plants of North India. Heliyon 2020; 6:e05203. [PMID: 33088962 PMCID: PMC7566102 DOI: 10.1016/j.heliyon.2020.e05203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Revised: 05/05/2020] [Accepted: 10/07/2020] [Indexed: 11/21/2022] Open
Abstract
In the present study, trypsin and chymotrypsin inhibitory activity of some plants of different families was evaluated. A total of 55 plants were screened, out of which six showed the maximum trypsin inhibitory activity namely Acacia concinna, Caesalpinia bonducella, Lathyrus sativus, Mucuna pruriens, Psoralea corylifolia and Sapindus mukorossi. Results suggested that the plants showing trypsin inhibitory activity (TIA) also have chymotrypsin inhibitory activity (CIA). Both trypsin and chymotrypsin inhibitory activities were high in seeds compared to leaves followed by flowers. It was also observed that TIA was maximally present in Sapindaceae family whereas CIA was maximum in fabaceae family followed by others.
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Lokya V, Swathi M, Mallikarjuna N, Padmasree K. Response of Midgut Trypsin- and Chymotrypsin-Like Proteases of Helicoverpa armigera Larvae Upon Feeding With Peanut BBI: Biochemical and Biophysical Characterization of PnBBI. FRONTIERS IN PLANT SCIENCE 2020; 11:266. [PMID: 32265951 PMCID: PMC7105688 DOI: 10.3389/fpls.2020.00266] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Accepted: 02/20/2020] [Indexed: 06/11/2023]
Abstract
Proteinase/Protease inhibitors (PIs) from higher plants play an important role in defense and confer resistance against various insect pests and pathogens. In the present study, Bowman-Birk Inhibitor (BBI) was purified from mature seeds of an interspecific advanced hybrid peanut variety (4368-1) using chromatographic techniques. The biochemical and biophysical characteristics such as low molecular mass, presence of several isoinhibitors and higher-ordered dimer/tetramer, predominance of antiparallel β-sheets and random coils in secondary structure, reactive sites against trypsin and chymotrypsin, broad spectrum of stability toward extreme pH and temperature along with MALDI TOF-TOF analysis (ProteomeXchange identifier PXD016933) ascertained the purified biomolecule from peanut as BBI (PnBBI). Surface plasmon resonance competitive binding analysis revealed the bifunctional PnBBI is a trypsin specific inhibitor with 1:2 stoichiometry as compared to chymotrypsin. A concentration-dependent self-association tendency of PnBBI was further confirmed by 'red shift' in the far-UV CD spectra. Furthermore, the insecticidal potential of PnBBI against Helicoverpa armigera was assessed by in vitro assays and in vivo feeding experiments. A significant reduction in larval body weight was observed with concomitant attenuation in the activity of midgut trypsin-like proteases of H. armigera (HaTPs) fed on PnBBI supplemented diet. The one and two-dimensional zymography studies revealed the disappearance of several isoforms of HaTP upon feeding with PnBBI. qRT-PCR analysis further suggests the role of PnBBI in not only inhibiting the activity of midgut trypsin and chymotrypsin-like proteases but also in modulating their expression. Taken together, the results provide a biochemical and molecular basis for introgressed resistance in peanut interspecific advanced hybrid variety against H. armigera.
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Affiliation(s)
- Vadthya Lokya
- Department of Biotechnology and Bioinformatics, School of Life Sciences, University of Hyderabad, Hyderabad, India
| | - Marri Swathi
- Department of Plant Sciences, School of Life Sciences, University of Hyderabad, Hyderabad, India
| | | | - Kollipara Padmasree
- Department of Biotechnology and Bioinformatics, School of Life Sciences, University of Hyderabad, Hyderabad, India
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Cotabarren J, Lufrano D, Parisi MG, Obregón WD. Biotechnological, biomedical, and agronomical applications of plant protease inhibitors with high stability: A systematic review. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2020; 292:110398. [PMID: 32005400 DOI: 10.1016/j.plantsci.2019.110398] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Revised: 10/29/2019] [Accepted: 12/30/2019] [Indexed: 06/10/2023]
Abstract
Protease inhibitors (PIs) are regulatory proteins found in numerous animal tissues and fluids, plants, and microorganisms that reduce and inhibit the exacerbated and uncontrolled activity of the target proteases. Specific PIs are also effective tools for inactivating proteases involved in human diseases like arthritis, pancreatitis, hepatitis, cancer, AIDS, thrombosis, emphysema, hypertension, and muscular dystrophy among others. Plant PIs-small peptides with a high content of cystine residues in disulfide bridges-possess a remarkable resistance to heat treatment and a high stability against shifts in pH, denaturing agents, ionic strength, and proteolysis. In recent years, novel biologic activities have been reported for plant PIs, including antimicrobial, anticoagulant, antioxidant action plus inhibition of tumor-cell growth; thus pointing to possible applications in medicine, agriculture, and biotechnology. In this review, we provide a comparative overview of plant-PIs classifying them in four groups according of their thermal and pH stability (high stability and hyperstable -to temperature and to pHs-, respectively), then emphasizing the relevance of the physicochemical characteristics of these proteins for potential biotechnological and industrial applications. Finally, we analyze the biologic activities of the stable protease inhibitors previously characterized that are the most relevant to potential applications in biomedicine, the food industry, and agriculture.
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Affiliation(s)
- Juliana Cotabarren
- Centro de Investigación de Proteínas Vegetales (CIProVe-CICPBA-UNLP), Departamento de Ciencias Biológicas, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 y 115 S/N, B1900AVW, La Plata, Argentina.
| | - Daniela Lufrano
- Centro de Investigación de Proteínas Vegetales (CIProVe-CICPBA-UNLP), Departamento de Ciencias Biológicas, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 y 115 S/N, B1900AVW, La Plata, Argentina.
| | - Mónica Graciela Parisi
- Departamento de Ciencias Básicas, Universidad Nacional de Luján, Ruta 5 y Avenida Constitución, Luján, 6700, Buenos Aires, Argentina.
| | - Walter David Obregón
- Centro de Investigación de Proteínas Vegetales (CIProVe-CICPBA-UNLP), Departamento de Ciencias Biológicas, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 y 115 S/N, B1900AVW, La Plata, Argentina.
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Kodama RT, Kuniyoshi AK, Silva CCFD, Cajado-Carvalho D, Duzzi B, Mariano DC, Pimenta DC, Borges R, Silva WDD, Portaro FCV. A Kunitz-type peptide from Dendroaspis polylepis venom as a simultaneous inhibitor of serine and cysteine proteases. J Venom Anim Toxins Incl Trop Dis 2020; 26:e20200037. [PMID: 33088285 PMCID: PMC7546081 DOI: 10.1590/1678-9199-jvatitd-2020-0037] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Accepted: 08/26/2020] [Indexed: 11/22/2022] Open
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Samiksha, Singh D, Kesavan AK, Sohal SK. Purification of a trypsin inhibitor from Psoralea corylifolia seeds and its influence on developmental physiology of Bactrocera cucurbitae. Int J Biol Macromol 2019; 139:1141-1150. [DOI: 10.1016/j.ijbiomac.2019.08.063] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Revised: 08/07/2019] [Accepted: 08/07/2019] [Indexed: 10/26/2022]
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9
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Parenté A, Di Meo F, Lapeyronie E, Al Mansi M, Delourme D, Pélissier P, Brémaud L, Trouillas P, Blanquet V. GASP-1 and GASP-2, two closely structurally related proteins with a functional duality in antitrypsin inhibition specificity: a mechanistic point of view. FEBS J 2019; 287:909-924. [PMID: 31556966 DOI: 10.1111/febs.15072] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Revised: 06/05/2019] [Accepted: 09/20/2019] [Indexed: 12/12/2022]
Abstract
While GASP-1 and GASP-2 proteins are known to regulate myogenesis by inhibiting myostatin, their structural organization suggests a putative role as multivalent protease inhibitors controlling different protease activities. In this study, we show the noncompetitive and competitive antitrypsin activities of the full-length GASP-1 and GASP-2 proteins, respectively, by using a bacterial system production and in vitro enzymatic experiments. The role of the second Kunitz domain in this functional duality is described by assessing the antitrypsin activity of GASP-1/2 chimeric proteins. Molecular dynamics simulations support the experimental data to rationalize differences in binding modes between trypsin and the GASP-1 and GASP-2 second Kunitz domains. A new inhibition mechanism was evidenced for the second Kunitz domain of GASP-2, in which the conventional cationic residue of trypsin inhibitors was substituted by the strongly interacting glutamine residue.
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Affiliation(s)
- Alexis Parenté
- University of Limoges, INRA, PEIRENE EA7500, USC1061 GAMAA, France
| | | | - Eric Lapeyronie
- University of Limoges, INRA, PEIRENE EA7500, USC1061 GAMAA, France
| | | | - Didier Delourme
- University of Limoges, INRA, PEIRENE EA7500, USC1061 GAMAA, France
| | | | - Laure Brémaud
- University of Limoges, INRA, PEIRENE EA7500, USC1061 GAMAA, France
| | - Patrick Trouillas
- University of Limoges, INSERM, UMR 1248 IPPRITT, France.,RCPTM, Palacký University, Olomouc, Czech Republic
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Tao F, Jiang H, Chen W, Zhang Y, Pan J, Jiang J, Jia Z. Covalent modification of soy protein isolate by (-)-epigallocatechin-3-gallate: effects on structural and emulsifying properties. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2018; 98:5683-5689. [PMID: 29736983 DOI: 10.1002/jsfa.9114] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2018] [Revised: 04/17/2018] [Accepted: 04/30/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND Soy protein isolate (SPI) has promising applications in various food products because of its excellent functional properties and nutritional quality. The structural and emulsifying properties of covalently modified SPI by (-)-epigallocatechin-3-gallate (EGCG) were investigated. RESULTS SPI was covalently modified by EGCG under alkaline conditions. SDS-PAGE analysis revealed that EGCG modification caused crosslinking of SPI proteins. Circular dichroism spectra demonstrated that the secondary structure of SPI proteins was changed by EGCG modification. In addition, the modifications resulted in the perturbation of the tertiary structure of SPI as evidenced by intrinsic fluorescence spectra and surface hydrophobicity measurements. Oil-in-water emulsions of modified SPI had smaller droplet sizes and better creaming stability compared to those from unmodified SPI. CONCLUSION The covalent modification by EGCG improved the emulsifying property of SPI. This study therefore provided an innovative approach for improving the emulsifying properties of proteins. © 2018 Society of Chemical Industry.
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Affiliation(s)
- Fei Tao
- College of Standardization, China Jiliang University, Hangzhou, China
| | - He Jiang
- Center for Food Safety & Quality, Hangzhou Institute for Food and Drug Control, Hangzhou, China
| | - Wenwei Chen
- Key Laboratory of Marine Food Quality and Hazard Controlling Technology of Zhejiang Province, China Jiliang University, Hangzhou, China
| | - Yongyong Zhang
- Key Laboratory of Marine Food Quality and Hazard Controlling Technology of Zhejiang Province, China Jiliang University, Hangzhou, China
| | - Jiarong Pan
- Key Laboratory of Marine Food Quality and Hazard Controlling Technology of Zhejiang Province, China Jiliang University, Hangzhou, China
| | - Jiaxin Jiang
- Key Laboratory of Marine Food Quality and Hazard Controlling Technology of Zhejiang Province, China Jiliang University, Hangzhou, China
| | - Zhenbao Jia
- Key Laboratory of Marine Food Quality and Hazard Controlling Technology of Zhejiang Province, China Jiliang University, Hangzhou, China
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Brandão-Costa RM, Araújo VF, Porto ALF. CgTI, a novel thermostable Kunitz trypsin-inhibitor purified from Cassia grandis seeds: Purification, characterization and termiticidal activity. Int J Biol Macromol 2018; 118:2296-2306. [DOI: 10.1016/j.ijbiomac.2018.07.110] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2018] [Revised: 07/12/2018] [Accepted: 07/17/2018] [Indexed: 12/16/2022]
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Cai X, Xie X, Fu N, Wang S. Physico-Chemical and Antifungal Properties of a Trypsin Inhibitor from the Roots of Pseudostellaria heterophylla. Molecules 2018; 23:E2388. [PMID: 30231516 PMCID: PMC6225307 DOI: 10.3390/molecules23092388] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2018] [Revised: 09/11/2018] [Accepted: 09/14/2018] [Indexed: 02/05/2023] Open
Abstract
Plant peptidase inhibitors play essential roles in the defense systems of plants. A trypsin inhibitor (PHTI) with a molecular mass of 20.5 kDa was isolated from the fresh roots of the medicinal herb, Pseudostellaria heterophylla. The purification process involved ammonium sulfate precipitation, gel filtration chromatography on Sephadex G50, and ion-exchange chromatography on DEAE 650M. The PHTI contained 3.7% α-helix, 42.1% β-sheets, 21.2% β-turns, and 33% disordered structures, which showed similarity with several Kunitz-type trypsin inhibitors. Inhibition kinetic studies indicated that PHTI was a competitive inhibitor, with a Ki value of 3.01 × 10-9 M, indicating a high affinity to trypsin. The PHTI exhibited considerable stability over a broad range of pH (2⁻10) and temperatures (20⁻70 °C); however, metal ions, including Fe3+, Ba2+, Mn2+, and Al3+, could inactivate PHTI to different degrees. Results of fluorescence spectroscopy and circular dichroism showed that Fe3+ could bind to TI with an association constant of 2.75 × 10⁵ M-1 to form a 1:1 complex, inducing conformation changes and inactivation of PHTI. In addition, PHTI could inhibit the growth of the phytopathogens, Colletotrichum gloeosporioides and Fusarium oxysporum, through disruption of the cell membrane integrity. The present study extended research on Pseudostellaria heterophylla proteins and makes PHTI an exploitable candidate as an antifungal protein for further investigation.
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Affiliation(s)
- Xixi Cai
- The Key Lab of Analysis and Detection Technology for Food Safety of the MOE, College of Chemistry, Fuzhou University, Fuzhou 350108, China.
- Institute of Food and Marine Bio-Resources, College of Biological Science and Technology, Fuzhou University, Fuzhou 350108, China.
| | - Xiaoli Xie
- Institute of Food and Marine Bio-Resources, College of Biological Science and Technology, Fuzhou University, Fuzhou 350108, China.
| | - Nanyan Fu
- The Key Lab of Analysis and Detection Technology for Food Safety of the MOE, College of Chemistry, Fuzhou University, Fuzhou 350108, China.
| | - Shaoyun Wang
- Institute of Food and Marine Bio-Resources, College of Biological Science and Technology, Fuzhou University, Fuzhou 350108, China.
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13
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Xu X, Liu J, Wang Y, Si Y, Wang X, Wang Z, Zhang Q, Yu H, Wang X. Kunitz-type serine protease inhibitor is a novel participator in anti-bacterial and anti-inflammatory responses in Japanese flounder (Paralichthys olivaceus). FISH & SHELLFISH IMMUNOLOGY 2018; 80:22-30. [PMID: 29859305 DOI: 10.1016/j.fsi.2018.05.058] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Revised: 04/16/2018] [Accepted: 05/30/2018] [Indexed: 06/08/2023]
Abstract
Kunitz-type serine protease inhibitor (KSPI) interacts with serine protease (SP) to regulate cascade reactions in vivo and plays essential roles in innate immunity. Theoretical considerations support various functions of kspi, but further studies are required for full characterization of these functions. In this study, a KSPI molecule was identified from Japanese flounder (Paralichthys olivaceus), and was named Pokspi. The full-length cDNA sequence of Pokspi was 2810 nt, containing an open reading frame of 1527 nt, which encoded a polypeptide of 509 amino acid residues. PoKspi protein contained five conversed domains, namely, MANEC, PKD, LDLa and two Kunitz domains. Homology analysis revealed that Pokspi shared the highest similarity (83%) with its homolog in Cynoglossus semilaevis. Phylogenetic analysis indicated that Pokspi clustered with the homologs in other fishes. The mRNA transcripts of Pokspi were detected in all tested tissues, with the highest expression level in gill, followed by kidney and intestine. Its elevated expression in response to the application of Edwardsiella tarda (in vivo) and pathogen-associated molecular pattern (in vitro) suggested the involvement of Pokspi in the essential immune defense against various pathogens. Recombinant PoKspi (rPoKspi) purified from Escherichia coli exhibited not only serine protease inhibitor activities but also a broad spectrum of anti-microbial effect in a manner that was independent of any host factors. In addition, the recombinant PoKspi protein could cause the down-regulation of pro-inflammatory factors TNF-α and IL-1β. In conclusion, Pokspi is a biologically active serine protease inhibitor endowed with anti-bacterial and anti-inflammatory property. This study provides strong evidences for understanding the innate immune defense in Japanese flounder.
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Affiliation(s)
- Xin Xu
- Key Laboratory of Marine Genetics and Breeding, Ministry of Education, Ocean University of China, 266003, Qingdao, Shandong, China
| | - Jinxiang Liu
- Key Laboratory of Marine Genetics and Breeding, Ministry of Education, Ocean University of China, 266003, Qingdao, Shandong, China
| | - Yujue Wang
- Key Laboratory of Marine Genetics and Breeding, Ministry of Education, Ocean University of China, 266003, Qingdao, Shandong, China
| | - Yu Si
- Key Laboratory of Marine Genetics and Breeding, Ministry of Education, Ocean University of China, 266003, Qingdao, Shandong, China
| | - Xuangang Wang
- Key Laboratory of Marine Genetics and Breeding, Ministry of Education, Ocean University of China, 266003, Qingdao, Shandong, China
| | - Zhigang Wang
- Key Laboratory of Marine Genetics and Breeding, Ministry of Education, Ocean University of China, 266003, Qingdao, Shandong, China
| | - Quanqi Zhang
- Key Laboratory of Marine Genetics and Breeding, Ministry of Education, Ocean University of China, 266003, Qingdao, Shandong, China
| | - Haiyang Yu
- Key Laboratory of Marine Genetics and Breeding, Ministry of Education, Ocean University of China, 266003, Qingdao, Shandong, China
| | - Xubo Wang
- Key Laboratory of Marine Genetics and Breeding, Ministry of Education, Ocean University of China, 266003, Qingdao, Shandong, China.
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Martins TF, Vasconcelos IM, Silva RGG, Silva FDA, Souza PFN, Varela ALN, Albuquerque LM, Oliveira JTA. A Bowman-Birk Inhibitor from the Seeds of Luetzelburgia auriculata Inhibits Staphylococcus aureus Growth by Promoting Severe Cell Membrane Damage. JOURNAL OF NATURAL PRODUCTS 2018; 81:1497-1507. [PMID: 29927595 DOI: 10.1021/acs.jnatprod.7b00545] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Staphylococcus aureus is a multidrug-resistant bacterium responsible for several cases of hospital-acquired infections, which constitute a global public health problem. The introduction of new healthcare strategies and/or the discovery of molecules capable of inhibiting the growth or killing S. aureus would have a huge impact on the treatment of S. aureus-mediated diseases. Herein, a Bowman-Birk protease inhibitor ( LzaBBI), with strong in vitro antibacterial activity against S. aureus, was purified to homogeneity from Luetzelburgia auriculata seeds. LzaBBI in its native form is a 14.3 kDa protein and has a pI of 4.54, and its NH2-terminal sequence has high identity with other Bowman-Birk inhibitors. LzaBBI showed a mixed-type inhibitory activity against both trypsin and chymotrypsin, respectively, and it remained stable after both boiling at 98 °C for 120 min and incubation at various pHs. Scanning electron microscopy revealed that LzaBBI disrupted the S. aureus membrane integrity, leading to bacterial death. This study suggests that LzaBBI is a powerful candidate for developing a new antimicrobial to overcome drug resistance toward reducing hospital-acquired infections caused by S. aureus.
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Affiliation(s)
- Thiago F Martins
- Laboratory of Plant Defense, Department of Biochemistry and Molecular Biology , Federal University of Ceara (UFC) , Avenida Mister Hull , 60451-970 , Fortaleza , Ceara , Brazil
| | - Ilka M Vasconcelos
- Laboratory of Plant Defense, Department of Biochemistry and Molecular Biology , Federal University of Ceara (UFC) , Avenida Mister Hull , 60451-970 , Fortaleza , Ceara , Brazil
| | - Rodolpho G G Silva
- Laboratory of Plant Defense, Department of Biochemistry and Molecular Biology , Federal University of Ceara (UFC) , Avenida Mister Hull , 60451-970 , Fortaleza , Ceara , Brazil
| | - Fredy D A Silva
- Laboratory of Plant Defense, Department of Biochemistry and Molecular Biology , Federal University of Ceara (UFC) , Avenida Mister Hull , 60451-970 , Fortaleza , Ceara , Brazil
| | - Pedro F N Souza
- Laboratory of Plant Defense, Department of Biochemistry and Molecular Biology , Federal University of Ceara (UFC) , Avenida Mister Hull , 60451-970 , Fortaleza , Ceara , Brazil
| | - Anna L N Varela
- Laboratory of Plant Defense, Department of Biochemistry and Molecular Biology , Federal University of Ceara (UFC) , Avenida Mister Hull , 60451-970 , Fortaleza , Ceara , Brazil
| | - Louise M Albuquerque
- Laboratory of Plant Defense, Department of Biochemistry and Molecular Biology , Federal University of Ceara (UFC) , Avenida Mister Hull , 60451-970 , Fortaleza , Ceara , Brazil
| | - Jose T A Oliveira
- Laboratory of Plant Defense, Department of Biochemistry and Molecular Biology , Federal University of Ceara (UFC) , Avenida Mister Hull , 60451-970 , Fortaleza , Ceara , Brazil
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15
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Medeiros AFD, Costa IDS, Carvalho FMCD, Kiyota S, Souza BBPD, Sifuentes DN, Serquiz RP, Maciel BLL, Uchôa AF, Santos EAD, Morais AHDA. Biochemical characterisation of a Kunitz-type inhibitor from Tamarindus indica L. seeds and its efficacy in reducing plasma leptin in an experimental model of obesity. J Enzyme Inhib Med Chem 2018; 33:334-348. [PMID: 29322840 PMCID: PMC6010142 DOI: 10.1080/14756366.2017.1419220] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
A trypsin inhibitor isolated from tamarind seed (TTI) has satietogenic effects in animals, increasing the cholecystokinin (CCK) in eutrophy and reducing leptin in obesity. We purified TTI (pTTI), characterised, and observed its effect upon CCK and leptin in obese Wistar rats. By HPLC, and after amplification of resolution, two protein fractions were observed: Fr1 and Fr2, with average mass of [M + 14H]+ = 19,594,690 Da and [M + 13H]+ = 19,578,266 Da, respectively. The protein fractions showed 54 and 53 amino acid residues with the same sequence. pTTI presented resistance to temperature and pH variations; IC50 was 2.7 × 10−10 mol.L−1 and Ki was 2.9 × 10−11 mol.L−1. The 2-DE revealed spots with isoelectric points between pH 5 and 6, and one near pH 8. pTTI action on leptin decrease was confirmed. We conclude that pTTI is a Kunitz trypsin inhibitor with possible biotechnological health-related application.
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Affiliation(s)
- Amanda Fernandes de Medeiros
- a Postgraduate Biochemistry Program, Biosciences Center , Federal University of Rio Grande do Norte , Natal , Brazil
| | - Izael de Sousa Costa
- a Postgraduate Biochemistry Program, Biosciences Center , Federal University of Rio Grande do Norte , Natal , Brazil
| | | | - Sumika Kiyota
- b Laboratory of Protein and Peptide Biochemistry , CPDSA, Biological Institute , São Paulo , Brazil
| | - Beatriz Blenda Pinheiro de Souza
- c Postgraduate Biological Molecular, Institute of Biological Sciences , University of Brasília , Distrito Federal , Brasília , Brazil.,d Embrapa Genetic Resources and Biotechnology , Embrapa , Distrito Federal , Brasília , Brazil
| | | | - Raphael Paschoal Serquiz
- a Postgraduate Biochemistry Program, Biosciences Center , Federal University of Rio Grande do Norte , Natal , Brazil
| | - Bruna Leal Lima Maciel
- e Postgraduate Nutrition Program, Center for Health Sciences , Federal University of Rio Grande do Norte , Natal , Brazil.,f Department of Nutrition, Center for Health Sciences , Federal University of Rio Grande do Norte , Natal , Brazil
| | - Adriana Ferreira Uchôa
- a Postgraduate Biochemistry Program, Biosciences Center , Federal University of Rio Grande do Norte , Natal , Brazil.,g Department of Cell Biology and Genetics, Biosciences Center , Federal University of Rio Grande do Norte , Natal , Brazil
| | - Elizeu Antunes Dos Santos
- a Postgraduate Biochemistry Program, Biosciences Center , Federal University of Rio Grande do Norte , Natal , Brazil.,h Department of Biochemistry, Biosciences Center , Federal University of Rio Grande do Norte , Natal , Brazil
| | - Ana Heloneida de Araújo Morais
- a Postgraduate Biochemistry Program, Biosciences Center , Federal University of Rio Grande do Norte , Natal , Brazil.,e Postgraduate Nutrition Program, Center for Health Sciences , Federal University of Rio Grande do Norte , Natal , Brazil.,f Department of Nutrition, Center for Health Sciences , Federal University of Rio Grande do Norte , Natal , Brazil
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16
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Dias LP, Oliveira JT, Rocha-Bezerra LC, Sousa DO, Costa HP, Araujo NM, Carvalho AF, Tabosa PM, Monteiro-Moreira AC, Lobo MD, Moreno FB, Rocha BA, Lopes JL, Beltramini LM, Vasconcelos IM. A trypsin inhibitor purified from Cassia leiandra seeds has insecticidal activity against Aedes aegypti. Process Biochem 2017. [DOI: 10.1016/j.procbio.2017.03.015] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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17
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Purification and Quantification of Kunitz Trypsin Inhibitor in Soybean Using Two-Dimensional Liquid Chromatography. FOOD ANAL METHOD 2017. [DOI: 10.1007/s12161-017-0902-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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18
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Almeida Filho LC, de Souza TM, Tabosa PM, Soares NG, Rocha-Bezerra LC, Vasconcelos IM, Carvalho AF. Trypsin inhibitor from Leucaena leucocephala seeds delays and disrupts the development of Aedes aegypti, a multiple-disease vector. PEST MANAGEMENT SCIENCE 2017; 73:181-187. [PMID: 27040615 DOI: 10.1002/ps.4284] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Revised: 03/28/2016] [Accepted: 03/31/2016] [Indexed: 06/05/2023]
Abstract
BACKGROUND Nowadays, the Aedes aegypti mosquito represents a serious public health issue in view of the large outbreaks of the arboviral diseases zika, dengue, chikungunya and yellow fever. This holometabolous insect has midgut digestive enzymes that are trypsin- and chymotrypsin-like proteins. Protease inhibitors are able to bind to proteolytic enzymes and promote a blockage in digestion and nutrition, leading to death. Thus, we investigated the effect of trypsin inhibitor of Leucaena leucocephala (LTI) seeds on egg hatching, larval development and digestive midgut proteases. RESULTS LTI was obtained by trichloroacetic acid precipitation followed by a single chromatography step on anhydrous trypsin sepharose. Polyacrylamide gel electrophoresis in the presence of sodium dodecyl sulphate showed a single protein band with a molecular mass close to 20 kDa. After exposure of Ae. aegypti eggs to LTI (0.3 mg mL-1 ), egg hatching was reduced (50%). LTI did not show acute toxicity on newly hatched larvae incubated under the same conditions, but after 10 days of exposure a high mortality rate (86%) was observed and the surviving larvae had a 25% delay in development. LTI was able to inhibit in vitro the midgut enzymatic activity (70%), and when larvae were incubated with LTI solution we observed an inhibition of 56%. CONCLUSIONS LTI is a promising new tool to control critical points of Ae. aegypti development. © 2016 Society of Chemical Industry.
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Affiliation(s)
- Luiz Cp Almeida Filho
- Biochemistry and Molecular Biology Department, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Terezinha M de Souza
- Biochemistry and Molecular Biology Department, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Pedro Ms Tabosa
- Biology Department, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Nayana G Soares
- Biology Department, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Lady Cb Rocha-Bezerra
- Biochemistry and Molecular Biology Department, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Ilka M Vasconcelos
- Biochemistry and Molecular Biology Department, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Ana Fu Carvalho
- Biology Department, Federal University of Ceará, Fortaleza, Ceará, Brazil
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Exploiting the biological roles of the trypsin inhibitor from Inga vera seeds: A multifunctional Kunitz inhibitor. Process Biochem 2016. [DOI: 10.1016/j.procbio.2016.03.008] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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20
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Dabhade AR, Mokashe NU, Patil UK. Purification, characterization, and antimicrobial activity of nontoxic trypsin inhibitor from Albizia amara Boiv. Process Biochem 2016. [DOI: 10.1016/j.procbio.2016.02.015] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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21
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Oddepally R, Guruprasad L. Isolation, purification, and characterization of a stable defensin-like antifungal peptide from Trigonella foenum-graecum (fenugreek) seeds. BIOCHEMISTRY (MOSCOW) 2015; 80:332-42. [DOI: 10.1134/s0006297915030086] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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