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Chen Y, Yang S, Zeng W, Zheng X, Wang P, Fu H, Yang F. Salicylic acid inducing the expression of maize anti-insect gene SPI: a potential control strategy for Ostrinia furnacalis. BMC PLANT BIOLOGY 2024; 24:152. [PMID: 38418954 PMCID: PMC10902998 DOI: 10.1186/s12870-024-04855-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Accepted: 02/22/2024] [Indexed: 03/02/2024]
Abstract
BACKGROUND Due to being rooted in the ground, maize (Zea mays L.) is unable to actively escape the attacks of herbivorous insects such as the Asian corn borer (Ostrinia furnacalis). In contrast to the passive damage, plants have evolved defense mechanisms to protect themselves from herbivores. Salicylic acid, a widely present endogenous hormone in plants, has been found to play an important role in inducing plant resistance to insects. In this study, we screened and identified the insect resistance gene SPI, which is simultaneously induced by SA and O. furnacalis feeding, through preliminary transcriptome data analysis. The functional validation of SPI was carried out using bioinformatics, RT-qPCR, and heterologous expression protein feeding assays. RESULTS Both SA and O. furnacalis treatment increased the expression abundance of SA-synthesis pathway genes and SPI in three maize strains, and the upregulation of SPI was observed strongly at 6 hours post-treatment. The expression of SPI showed a temporal relationship with SA pathway genes, indicating that SPI is a downstream defense gene regulated by SA. Protein feeding assays using two different expression vectors demonstrated that the variation in SPI protein activity among different strains is mainly due to protein modifications. CONCLUSIONS Our research results indicate that SPI, as a downstream defense gene regulated by SA, is induced by SA and participates in maize's insect resistance. The differential expression levels of SPI gene and protein modifications among different maize strains are one of the reasons for the variation in insect resistance. This study provides new insights into ecological pest control in maize and valuable insights into plant responses to SA-induced insect resistance.
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Affiliation(s)
- Yuanlong Chen
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Ecological Restoration and Resource Utilization for Cold Region & Key Laboratory of Molecular Biology, College of Heilongjiang Province & School of Life Sciences, Heilongjiang University, Harbin, 150080, China
| | - Siyuan Yang
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Ecological Restoration and Resource Utilization for Cold Region & Key Laboratory of Molecular Biology, College of Heilongjiang Province & School of Life Sciences, Heilongjiang University, Harbin, 150080, China
| | - Wei Zeng
- School of economies and management, Beijing University of chemical technology, Beijing, 100029, China
| | - Xu Zheng
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Ecological Restoration and Resource Utilization for Cold Region & Key Laboratory of Molecular Biology, College of Heilongjiang Province & School of Life Sciences, Heilongjiang University, Harbin, 150080, China
| | - Pan Wang
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Ecological Restoration and Resource Utilization for Cold Region & Key Laboratory of Molecular Biology, College of Heilongjiang Province & School of Life Sciences, Heilongjiang University, Harbin, 150080, China
| | - Haiyan Fu
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Ecological Restoration and Resource Utilization for Cold Region & Key Laboratory of Molecular Biology, College of Heilongjiang Province & School of Life Sciences, Heilongjiang University, Harbin, 150080, China.
| | - Fengshan Yang
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Ecological Restoration and Resource Utilization for Cold Region & Key Laboratory of Molecular Biology, College of Heilongjiang Province & School of Life Sciences, Heilongjiang University, Harbin, 150080, China.
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2
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Ferreira MM, Farias KS, Zugaib M, Alves AMM, Amaral GV, Santos MLDC, Freitas ADS, Santana BCG, dos Santos Júnior SL, Mora-Ocampo IY, Santos AS, da Silva MF, Andrade BS, Pirovani CP. TcSERPIN, an inhibitor that interacts with cocoa defense proteins and has biotechnological potential against human pathogens. FRONTIERS IN PLANT SCIENCE 2024; 15:1337750. [PMID: 38348273 PMCID: PMC10859438 DOI: 10.3389/fpls.2024.1337750] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Accepted: 01/09/2024] [Indexed: 02/15/2024]
Abstract
In plants, serpins are a superfamily of serine and cysteine protease inhibitors involved in stress and defense mechanisms, with potential for controlling agricultural pests, making them important biotechnological tools. The objective of this study was to characterize a serpin from Theobroma cacao, called TcSERPIN, to identify its endogenous targets and determine its function and biotechnological potential. TcSERPIN has 390 amino acid residues and shows conservation of the main active site, RCL. Cis-elements related to light, stress, hormones, anaerobic induction, cell cycle regulation and defense have been identified in the gene's regulatory region. TcSERPIN transcripts are accumulated in different tissues of Theobroma cacao. Furthermore, in plants infected with Moniliophtora perniciosa and Phytophthora palmivora, the expression of TcSERPIN was positively regulated. The protein spectrum, rTcSERPIN, reveals a typical β-sheet pattern and is thermostable at pH 8, but loses its structure with temperature increases above 66°C at pH 7. At the molar ratios of 0.65 and 0.49, rTcSERPIN inhibited 55 and 28% of the activity of papain from Carica papaya and trypsin from Sus scrofa, respectively. The protease trap containing immobilized rTcSERPIN captured endogenous defense proteins from cocoa extracts that are related to metabolic pathways, stress and defense. The evaluation of the biotechnological potential against geohelminth larvae showed that rTcSERPIN and rTcCYS4 (Theobroma cacao cystatin 4) reduced the movement of larvae after 24 hours. The results of this work show that TcSERPIN has ideal biochemical characteristics for biotechnological applications, as well as potential for studies of resistance to phytopathogens of agricultural crops.
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Affiliation(s)
- Monaliza Macêdo Ferreira
- Centro de Biotecnologia e Genética (CBG), Departamento de Ciências Biológicas, Universidade Estadual de Santa Cruz (UESC), Ilhéus, Bahia, Brazil
| | - Keilane Silva Farias
- Centro de Biotecnologia e Genética (CBG), Departamento de Ciências Biológicas, Universidade Estadual de Santa Cruz (UESC), Ilhéus, Bahia, Brazil
| | - Maria Zugaib
- Centro de Biotecnologia e Genética (CBG), Departamento de Ciências Biológicas, Universidade Estadual de Santa Cruz (UESC), Ilhéus, Bahia, Brazil
| | - Akyla Maria Martins Alves
- Centro de Biotecnologia e Genética (CBG), Departamento de Ciências Biológicas, Universidade Estadual de Santa Cruz (UESC), Ilhéus, Bahia, Brazil
| | - Geiseane Velozo Amaral
- Centro de Biotecnologia e Genética (CBG), Departamento de Ciências Biológicas, Universidade Estadual de Santa Cruz (UESC), Ilhéus, Bahia, Brazil
| | - Maria Luíza do Carmo Santos
- Centro de Biotecnologia e Genética (CBG), Departamento de Ciências Biológicas, Universidade Estadual de Santa Cruz (UESC), Ilhéus, Bahia, Brazil
| | - Andria dos Santos Freitas
- Centro de Biotecnologia e Genética (CBG), Departamento de Ciências Biológicas, Universidade Estadual de Santa Cruz (UESC), Ilhéus, Bahia, Brazil
| | - Brenda Conceição Guimarães Santana
- Centro de Biotecnologia e Genética (CBG), Departamento de Ciências Biológicas, Universidade Estadual de Santa Cruz (UESC), Ilhéus, Bahia, Brazil
| | - Sérgio Liberato dos Santos Júnior
- Centro de Biotecnologia e Genética (CBG), Departamento de Ciências Biológicas, Universidade Estadual de Santa Cruz (UESC), Ilhéus, Bahia, Brazil
| | - Irma Yuliana Mora-Ocampo
- Centro de Biotecnologia e Genética (CBG), Departamento de Ciências Biológicas, Universidade Estadual de Santa Cruz (UESC), Ilhéus, Bahia, Brazil
| | - Ariana Silva Santos
- Centro de Biotecnologia e Genética (CBG), Departamento de Ciências Biológicas, Universidade Estadual de Santa Cruz (UESC), Ilhéus, Bahia, Brazil
| | - Marcelo Fernandes da Silva
- Centro de Biotecnologia e Genética (CBG), Departamento de Ciências Biológicas, Universidade Estadual de Santa Cruz (UESC), Ilhéus, Bahia, Brazil
| | - Bruno Silva Andrade
- Laboratório de Bioinformática e Química Computacional (LBQC), Departamento de Ciências Biológicas, Universidade Estadual do Sudoeste da Bahia (UESB), Jequié, Bahia, Brazil
| | - Carlos Priminho Pirovani
- Centro de Biotecnologia e Genética (CBG), Departamento de Ciências Biológicas, Universidade Estadual de Santa Cruz (UESC), Ilhéus, Bahia, Brazil
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Ferreira MM, Santos AS, Santos AS, Zugaib M, Pirovani CP. Plant Serpins: Potential Inhibitors of Serine and Cysteine Proteases with Multiple Functions. PLANTS (BASEL, SWITZERLAND) 2023; 12:3619. [PMID: 37896082 PMCID: PMC10609998 DOI: 10.3390/plants12203619] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 06/23/2023] [Accepted: 06/26/2023] [Indexed: 10/29/2023]
Abstract
Plant serpins are a superfamily of protein inhibitors that have been continuously studied in different species and have great biotechnological potential. However, despite ongoing studies with these inhibitors, the biological role of this family in the plant kingdom has not yet been fully clarified. In order to obtain new insights into the potential of plant serpins, this study presents the first systematic review of the topic, whose main objective was to scrutinize the published literature to increase knowledge about this superfamily. Using keywords and the eligibility criteria defined in the protocol, we selected studies from the Scopus, PubMed, and Web of Science databases. According to the eligible studies, serpins inhibit different serine and non-serine proteases from plants, animals, and pathogens, and their expression is affected by biotic and abiotic stresses. Moreover, serpins like AtSerpin1, OSP-LRS, MtSer6, AtSRP4, AtSRP5, and MtPiI4, act in resistance and are involved in stress-induced cell death in the plant. Also, the system biology analysis demonstrates that serpins are related to proteolysis control, cell regulation, pollen development, catabolism, and protein dephosphorylation. The information systematized here contributes to the design of new studies of plant serpins, especially those aimed at exploring their biotechnological potential.
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Affiliation(s)
- Monaliza Macêdo Ferreira
- Center for Biotechnology and Genetics, Department of Biological Sciences, Santa Cruz State University, Ilhéus 45662-900, BA, Brazil; (A.S.S.); (M.Z.); (C.P.P.)
| | - Ariana Silva Santos
- Center for Biotechnology and Genetics, Department of Biological Sciences, Santa Cruz State University, Ilhéus 45662-900, BA, Brazil; (A.S.S.); (M.Z.); (C.P.P.)
| | | | - Maria Zugaib
- Center for Biotechnology and Genetics, Department of Biological Sciences, Santa Cruz State University, Ilhéus 45662-900, BA, Brazil; (A.S.S.); (M.Z.); (C.P.P.)
| | - Carlos Priminho Pirovani
- Center for Biotechnology and Genetics, Department of Biological Sciences, Santa Cruz State University, Ilhéus 45662-900, BA, Brazil; (A.S.S.); (M.Z.); (C.P.P.)
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4
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Aggarwal KK. A Non-competitive Serpin-Like Thrombin Inhibitor Isolated from Moringa oleifera Exhibit a High Affinity for Thrombin. Protein J 2023:10.1007/s10930-023-10116-6. [PMID: 37149510 DOI: 10.1007/s10930-023-10116-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/13/2023] [Indexed: 05/08/2023]
Abstract
The majority of the clotting factors involved in blood coagulation pathways are serine proteases and thrombin is one of the key serine proteases involved in blood clotting. Many synthetic and chemical drugs targeting these proteases as therapeutics are known. However, they are associated with serious side effects such as bleeding, haemorrhage, edema etc. Serine protease inhibitors from plants have been suggested as one of the potential anticoagulant molecules against thrombosis. In the present work, a direct thrombin inhibitor from Moringa oleifera was isolated, purified and characterized. The homogeneity of the inhibitor is confirmed on native- PAGE. The purified inhibitor (5 µg) showed 63% thrombin inhibition at pH 7.2 at 37 °C. The IC50 value of the isolated inhibitor was determined as 4.23 µg. The inhibitor on SDS-PAGE appeared as a single protein-stained band corresponding to 50 kDa thereby indicating its molecular weight as 50 kDa. Purified thrombin inhibitor (5 µg) showed 12% inhibition of trypsin, and 17% inhibition of chymotrypsin. This suggests more specificity of purified inhibitor towards thrombin. The isolated inhibitor showed a non-competitive mode of inhibition against thrombin as determined by the Dixon plot. The inhibition constant (Ki) was calculated as 4.35 × 10-7 M. The present work reports for the first time a direct thrombin inhibitor from M. oleifera which may be further explored as an antithrombotic drug.
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Affiliation(s)
- Kamal Krishan Aggarwal
- University School of Biotechnology, Guru Gobind Singh Indraprastha University, Sector 16-C Dwarka, New Delhi, 110078, India.
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5
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Afzal M, Sielaff M, Distler U, Schuppan D, Tenzer S, Longin CFH. Reference proteomes of five wheat species as starting point for future design of cultivars with lower allergenic potential. NPJ Sci Food 2023; 7:9. [PMID: 36966156 PMCID: PMC10039927 DOI: 10.1038/s41538-023-00188-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Accepted: 03/06/2023] [Indexed: 03/27/2023] Open
Abstract
Wheat is an important staple food and its processing quality is largely driven by proteins. However, there is a sizable number of people with inflammatory reactions to wheat proteins, namely celiac disease, wheat allergy and the syndrome of non-celiac wheat sensitivity. Thus, proteome profiles should be of high importance for stakeholders along the wheat supply chain. We applied liquid chromatography-tandem mass spectrometry-based proteomics to establish the flour reference proteome for five wheat species, ancient to modern, each based on 10 cultivars grown in three diverse environments. We identified at least 2540 proteins in each species and a cluster analyses clearly separated the species based on their proteome profiles. Even more, >50% of proteins significantly differed between species - many of them implicated in products' quality, grain-starch synthesis, plant stress regulation and proven or potential allergic reactions in humans. Notably, the expression of several important wheat proteins was found to be mainly driven by genetics vs. environmental factors, which enables selection and refinement of improved cultivars for the wheat supply chain as long as rapid test methods will be developed. Especially einkorn expressed 5.4 and 7.2-fold lower quantities of potential allergens and immunogenic amylase trypsin inhibitors, respectively, than common wheat, whereas potential allergen content was intermediate in tetraploid wheat species. This urgently warrants well-targeted clinical studies, where the developed reference proteomes will help to design representative test diets.
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Affiliation(s)
- Muhammad Afzal
- State Plant Breeding Institute, University of Hohenheim, Fruwirthstr. 21, 70599, Stuttgart, Germany
| | - Malte Sielaff
- Institute for Immunology and Research Center for Immune Therapy (FZI), University Medical Center of the Johannes Gutenberg University Mainz, Langenbeckstr. 1, 55131, Mainz, Germany
| | - Ute Distler
- Institute for Immunology and Research Center for Immune Therapy (FZI), University Medical Center of the Johannes Gutenberg University Mainz, Langenbeckstr. 1, 55131, Mainz, Germany
| | - Detlef Schuppan
- Institute of Translational Immunology and Research Center for Immune Therapy (FZI), University Medical Center of the Johannes Gutenberg University Mainz, Langenbeckstr. 1, 55131, Mainz, Germany
- Division of Gastroenterology, Beth Israel Deaconess Medical Center, Harvard Medical School, 330 Brookline Avenue, Boston, MA, 02215, USA
| | - Stefan Tenzer
- Institute for Immunology and Research Center for Immune Therapy (FZI), University Medical Center of the Johannes Gutenberg University Mainz, Langenbeckstr. 1, 55131, Mainz, Germany
| | - C Friedrich H Longin
- State Plant Breeding Institute, University of Hohenheim, Fruwirthstr. 21, 70599, Stuttgart, Germany.
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6
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Dong C, Huang TC, Roberts TH. Genes Encoding Structurally Conserved Serpins in the Wheat Genome: Identification and Expression Profiles during Plant Development and Abiotic and Biotic Stress. Int J Mol Sci 2023; 24:ijms24032707. [PMID: 36769030 PMCID: PMC9917288 DOI: 10.3390/ijms24032707] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 01/25/2023] [Accepted: 01/25/2023] [Indexed: 02/04/2023] Open
Abstract
Serpins constitute a family of proteins with a very wide distribution in nature. Serpins have a well-conserved tertiary structure enabling irreversible protease inhibition or other specific biochemical functions. We examined the 189 putative wheat serpin genes previously identified by Benbow et al. (2019) via analysis of gene annotations (RefSeq v1.0) and combined our previous examinations of wheat ESTs and the 454 genome assembly. We found that 81 of the 189 putative serpin genes, plus two manually annotated genes, encode full-length, structurally conserved serpins. Expression of these serpin genes during wheat development and disease/abiotic stress responses was analysed using a publicly available RNAseq database. Results showed that the wheat LR serpins, homologous to Arabidopsis AtSerpin1 and barley BSZx, are ubiquitously expressed across all tissues throughout the wheat lifecycle, whereas the expression of other wheat serpin genes is tissue-specific, including expression only in the grain, only in the root, and only in the anther and microspore. Nine serpin genes were upregulated in both biotic and abiotic responses. Two genes in particular were highly expressed during disease and abiotic challenges. Our findings provide valuable information for further functional study of the wheat serpins, which in turn may lead to their application as molecular markers in wheat breeding.
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Affiliation(s)
- Chongmei Dong
- School of Life and Environmental Sciences, University of Sydney, Camperdown, NSW 2006, Australia
- Plant Breeding Institute, University of Sydney, Cobbitty, NSW 2570, Australia
| | - Ting-Chun Huang
- School of Life and Environmental Sciences, University of Sydney, Camperdown, NSW 2006, Australia
| | - Thomas H. Roberts
- School of Life and Environmental Sciences, University of Sydney, Camperdown, NSW 2006, Australia
- Correspondence:
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Kårlund A, Paukkonen I, Gómez-Gallego C, Kolehmainen M. Intestinal Exposure to Food-Derived Protease Inhibitors: Digestion Physiology- and Gut Health-Related Effects. Healthcare (Basel) 2021; 9:1002. [PMID: 34442141 PMCID: PMC8394810 DOI: 10.3390/healthcare9081002] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 07/22/2021] [Accepted: 08/03/2021] [Indexed: 12/15/2022] Open
Abstract
Plant-derived protease inhibitors (PI), such as Bowman-Birk inhibitors and Kunitz-type inhibitors, have been suggested to negatively affect dietary protein digestion by blocking the activity of trypsin and chymotrypsin in the human gastrointestinal system. In addition, some PIs may possess proinflammatory activities. However, there is also scientific evidence on some beneficial effects of PIs, for example, gut-related anti-inflammatory and chemopreventive activities in vitro and in vivo. Some PIs are sensitive to processing and digestion; thus, their survival is an important aspect when considering their positive and negative bioactivities. The aim of this review was to evaluate the relevance of PIs in protein digestion in humans and to discuss the potential of PIs from whole foods and as purified compounds in decreasing symptoms of bowel-related conditions. Based on the reviewed literature, we concluded that while the complex interactions affecting plant protein digestibility and bioavailability remain unclear, PI supplements could be considered for targeted purposes to mitigate inflammation and gastric pain.
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Affiliation(s)
- Anna Kårlund
- Institute of Public Health and Clinical Nutrition, University of Eastern Finland, P.O. Box 1627, FI-70211 Kuopio, Finland; (C.G.-G.); (M.K.)
| | - Isa Paukkonen
- Institute of Biomedicine, University of Eastern Finland, P.O. Box 1627, FI-70211 Kuopio, Finland;
| | - Carlos Gómez-Gallego
- Institute of Public Health and Clinical Nutrition, University of Eastern Finland, P.O. Box 1627, FI-70211 Kuopio, Finland; (C.G.-G.); (M.K.)
| | - Marjukka Kolehmainen
- Institute of Public Health and Clinical Nutrition, University of Eastern Finland, P.O. Box 1627, FI-70211 Kuopio, Finland; (C.G.-G.); (M.K.)
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Chen G, Li R, Shen X. ApSerpin-ZX from Agapanthus praecox, is a potential cryoprotective agent to plant cryopreservation. Cryobiology 2020; 98:103-111. [PMID: 33316226 DOI: 10.1016/j.cryobiol.2020.11.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 11/17/2020] [Accepted: 11/19/2020] [Indexed: 10/22/2022]
Abstract
Cryopreservation-induced cell death is regarded as an important problem faced by cryobiologists. Oxidative stress and programmed cell death are detrimental to cell survival. Serine protease inhibitors (serpins) inhibit pro-cell-death proteases and play a pro-survival role in excessive cell death induced by abiotic stress. In this study, ApSerpin-ZX was isolated from Agapanthus praecox and characterized as a protective protein in plant cryopreservation. The mRNA level of ApSerpin-ZX was elevated under abiotic stress, such as salt, osmosis, oxidative, cold, and cryoinjury. The purified recombinant protein expressed in E. coli was added to the plant vitrification solution and used for A. praecox embryogenic callus cryopreservation. The concentration of 0.6-4.8 mg∙L-1 of ApSerpin-ZX protein was beneficial to the survival of cryopreserved embryogenic callus of A. praecox. The most effective concentration was 1.2 mg∙L-1, which elevated the survival by 37.15%. Subsequently, the cryopreservation procedure with 1.2 mg∙L-1 of ApSerpin-ZX protein was regarded as the treated group, compared to standard procedure, to determine the physiological mechanism of ApSerpin-ZX protein on cryopreserved cell. The MDA and H2O2 contents were significantly decreased in the treated group, along with reduced OH· generation activity in the recovery stage. After the addition of ApSerpin-ZX, the POD and CAT activities keep increased, while SOD activity increased only after dehydration. Besides, the caspase-1-like and caspase-3-like activities were lower than the standard procedure. This study indicated that ApSerpin-ZX was a potential cryoprotective agent that alleviated oxidative stress and cell death induced by cryopreservation.
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Affiliation(s)
- Guanqun Chen
- School of Design, Shanghai Jiao Tong University, Shanghai, 200240, China.
| | - Ruilian Li
- School of Design, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Xiaohui Shen
- School of Design, Shanghai Jiao Tong University, Shanghai, 200240, China.
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Rehman S, Jørgensen B, Aziz E, Batool R, Naseer S, Rasmussen SK. Genome Wide Identification and Comparative Analysis of the Serpin Gene Family in Brachypodium and Barley. PLANTS 2020; 9:plants9111439. [PMID: 33114466 PMCID: PMC7692276 DOI: 10.3390/plants9111439] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/03/2020] [Revised: 10/15/2020] [Accepted: 10/15/2020] [Indexed: 11/16/2022]
Abstract
Serpins (serine protease inhibitors) constitute one of the largest and most widely distributed superfamilies of protease inhibitors and have been identified in nearly all organisms. To gain significant insights, a comprehensive in silico analysis of the serpin gene family was carried out in the model plant for temperate grasses Brachypodium distachyon and barley Hordeum vulgare using bioinformatic tools at the genome level for the first time. We identified a total of 27 BdSRPs and 25 HvSRP genes in Brachypodium and barley, respectively, showing an unexpectedly high gene number in these model plants. Gene structure, conserved motifs and phylogenetic comparisons of serpin genes supported the role of duplication events in the expansion and evolution of serpin gene family. Further, purifying selection pressure was found to be a main driving force in the evolution of serpin genes. Genome synteny analysis indicated that BdSRP genes were present in syntenic regions of barley, rice, sorghum and maize, suggesting that they evolved before the divergence of these species from common ancestor. The distinct expression pattern in specific tissues further suggested a specialization of functions during development and in plant defense. These results suggest that the LR serpins (serpins with Leu-Arg residues at P2-P1') identified here can be utilized as candidates for exploitation in disease resistance, pest control and preventing stress-induced cell death. Additionally, serpins were identified that could lead to further research aimed at validating and functionally characterizing the role of potential serpin genes from other plants.
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Affiliation(s)
- Shazia Rehman
- Department of Botany, Rawalpindi Women University, 6th Road, Satellite Town, Rawalpindi 46200, Pakistan
- Department of Botany, Govt. Gordon College Rawalpindi, Rawalpindi 46000, Pakistan
- Department of Plant and Environmental Sciences, Faculty of Sciences, University of Copenhagen, 1871 Frederiksberg C, Denmark;
- Correspondence: (S.R.); (S.K.R.)
| | - Bodil Jørgensen
- Department of Plant and Environmental Sciences, Faculty of Sciences, University of Copenhagen, 1871 Frederiksberg C, Denmark;
| | - Ejaz Aziz
- Department of Botany, Government Degree College Khanpur, Haripur 22650, Pakistan;
| | - Riffat Batool
- University Institute of Biochemistry and Biotechnology, PMAS, Arid Agriculture University, Rawalpindi, Rawalpindi 46300, Pakistan;
| | - Samar Naseer
- Department of Biology and Environmental Science, Faculty of Sciences, Allama Iqbal Open University, Islamabad 44000, Pakistan;
| | - Søren K. Rasmussen
- Department of Plant and Environmental Sciences, Faculty of Sciences, University of Copenhagen, 1871 Frederiksberg C, Denmark;
- Correspondence: (S.R.); (S.K.R.)
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10
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Singh S, Singh A, Kumar S, Mittal P, Singh IK. Protease inhibitors: recent advancement in its usage as a potential biocontrol agent for insect pest management. INSECT SCIENCE 2020; 27:186-201. [PMID: 30230264 DOI: 10.1111/1744-7917.12641] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Revised: 08/14/2018] [Accepted: 08/29/2018] [Indexed: 05/13/2023]
Abstract
Plant-derived protease inhibitors (PIs) are a promising defensin for crop improvement and insect pest management. Although agronomist made significant efforts in utilizing PIs for managing insect pests, the potentials of PIs are still obscured. Insect ability to compensate nutrient starvation induced by dietary PI feeding using different strategies, that is, overexpression of PI-sensitive protease, expression of PI-insensitive proteases, degradation of PI, has made this innumerable collection of PIs worthless. A practical challenge for agronomist is to identify potent PI candidates, to limit insect compensatory responses and to elucidate insect compensatory and resistance mechanisms activated upon herbivory. This knowledge could be further efficiently utilized to identify potential targets for RNAi-mediated pest control. These vital genes of insects could be functionally annotated using the advanced gene-editing technique, CRISPR/Cas9. Contemporary research is exploiting different in silico and modern molecular biology techniques to utilize PIs in controlling insect pests efficiently. This review is structured to update recent advancements in this field, along with its chronological background.
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Affiliation(s)
- Sujata Singh
- Molecular Biology Research Laboratory, Department of Zoology, Deshbandhu College, University of Delhi, Kalkaji, New Delhi, India
| | - Archana Singh
- Department of Botany, Hans Raj College, University of Delhi, Delhi, India
| | - Sumit Kumar
- Molecular Biology Research Laboratory, Department of Zoology, Deshbandhu College, University of Delhi, Kalkaji, New Delhi, India
| | - Pooja Mittal
- Molecular Biology Research Laboratory, Department of Zoology, Deshbandhu College, University of Delhi, Kalkaji, New Delhi, India
| | - Indrakant K Singh
- Molecular Biology Research Laboratory, Department of Zoology, Deshbandhu College, University of Delhi, Kalkaji, New Delhi, India
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Samtiya M, Aluko RE, Dhewa T. Plant food anti-nutritional factors and their reduction strategies: an overview. FOOD PRODUCTION, PROCESSING AND NUTRITION 2020. [DOI: 10.1186/s43014-020-0020-5] [Citation(s) in RCA: 160] [Impact Index Per Article: 40.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Abstract
Legumes and cereals contain high amounts of macronutrients and micronutrients but also anti-nutritional factors. Major anti-nutritional factors, which are found in edible crops include saponins, tannins, phytic acid, gossypol, lectins, protease inhibitors, amylase inhibitor, and goitrogens. Anti-nutritional factors combine with nutrients and act as the major concern because of reduced nutrient bioavailability. Various other factors like trypsin inhibitors and phytates, which are present mainly in legumes and cereals, reduce the digestibility of proteins and mineral absorption. Anti-nutrients are one of the key factors, which reduce the bioavailability of various components of the cereals and legumes. These factors can cause micronutrient malnutrition and mineral deficiencies. There are various traditional methods and technologies, which can be used to reduce the levels of these anti-nutrient factors. Several processing techniques and methods such as fermentation, germination, debranning, autoclaving, soaking etc. are used to reduce the anti-nutrient contents in foods. By using various methods alone or in combinations, it is possible to reduce the level of anti-nutrients in foods. This review is focused on different types of anti-nutrients, and possible processing methods that can be used to reduce the level of these factors in food products.
Graphical abstract
A brief overview of beneficial effects of anti-nutrients and reduction strategy.
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12
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Hellinger R, Gruber CW. Peptide-based protease inhibitors from plants. Drug Discov Today 2019; 24:1877-1889. [PMID: 31170506 PMCID: PMC6753016 DOI: 10.1016/j.drudis.2019.05.026] [Citation(s) in RCA: 62] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Revised: 05/03/2019] [Accepted: 05/29/2019] [Indexed: 02/08/2023]
Abstract
Proteases have an important role in homeostasis, and dysregulation of protease function can lead to pathogenesis. Therefore, proteases are promising drug targets in cancer, inflammation, and neurodegenerative disease research. Although there are well-established pharmaceuticals on the market, drug development for proteases is challenging. This is often caused by the limited selectivity of currently available lead compounds. Proteinaceous plant protease inhibitors are a diverse family of (poly)peptides that are important to maintain physiological homeostasis and to serve the innate defense machinery of the plant. In this review, we provide an overview of the diversity of plant peptide- and protein-based protease inhibitors (PIs), provide examples of such compounds that target human proteases, and discuss opportunities for these molecules in protease drug discovery and development.
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Affiliation(s)
- Roland Hellinger
- Center for Pharmacology and Physiology, Medical University of Vienna, Schwarzspanierstr. 17, 1090 Vienna, Austria
| | - Christian W Gruber
- Center for Pharmacology and Physiology, Medical University of Vienna, Schwarzspanierstr. 17, 1090 Vienna, Austria.
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Cohen M, Davydov O, Fluhr R. Plant serpin protease inhibitors: specificity and duality of function. JOURNAL OF EXPERIMENTAL BOTANY 2019; 70:2077-2085. [PMID: 30721992 DOI: 10.1093/jxb/ery460] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Accepted: 12/19/2018] [Indexed: 05/24/2023]
Abstract
The serpins are a family of structurally conserved protease inhibitors found in all animal and plant kingdoms. After interaction with their cognate substrate(s), their native energetically stressed state is relaxed by hydrolysis, resulting in a semi-stable covalent bond that disables the protease. The inherent flexible serpin structure supports additional non-inhibitory functions. This review will focus on several biological functions attributed to plant serpins, ranging from specific cell death protease inhibitors to a stabilizing role for β-amylase in seeds. Functional conservation of a particular serpin type, the LR serpins, is suggested by its compelling ubiquity throughout the plant kingdom. The multiple target specificity of plant serpins including the LR serpins enables them to perform dual functions that are not mutually exclusive both as a regulator of cell death and as a protective anti-pathogenic protein.
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Affiliation(s)
- Maja Cohen
- Department of Plant and Environmental Sciences, Weizmann Institute of Science, Rehovot, Israel
| | - Olga Davydov
- Department of Plant and Environmental Sciences, Weizmann Institute of Science, Rehovot, Israel
| | - Robert Fluhr
- Department of Plant and Environmental Sciences, Weizmann Institute of Science, Rehovot, Israel
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Cohen M, Fluhr R. Noncanonical interactions between serpin and β-amylase in barley grain improve β-amylase activity in vitro. PLANT DIRECT 2018; 2:e00054. [PMID: 31245723 PMCID: PMC6508567 DOI: 10.1002/pld3.54] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Revised: 03/23/2018] [Accepted: 03/26/2018] [Indexed: 05/31/2023]
Abstract
Serpin protease inhibitors and β-amylase starch hydrolases are very abundant seed proteins in the endosperm of grasses. β-amylase is a crucial enzyme in the beer industry providing maltose for fermenting yeast. In animals and plants, inhibitory serpins form covalent linkages that inactivate their cognate proteases. Additionally, in animals, noninhibitory functions for serpins are observed such as metabolite carriers and chaperones. The function of serpins in seeds has yet to be unveiled. In developing endosperm, serpin Z4 and β-amylase showed similar in vivo spatio-temporal accumulation properties and colocalize in the cytosol of transformed tobacco leaves. A molecular interaction between recombinant proteins of serpin Z4 and β-amylase was revealed by surface plasmon resonance and microscale thermophoresis yielding a dissociation constant of 10-7 M. Importantly, the addition of serpin Z4 significantly changes β-amylase enzymatic properties by increasing its maximal catalytic velocity. The presence of serpin Z4 stabilizes β-amylase activity during heat treatment without affecting its critical denaturing temperature. Oxidative stress, simulated by the addition of CuCl2, leads to the formation of high molecular weight polymers of β-amylase similar to those detected in vivo. The polymers were cross-linked through disulfide bonds, the formation of which was repressed when serpin Z4 was present. The results suggest an unprecedented function for a plant seed serpin as a β-amylase-specific chaperone-like partner that could optimize β-amylase activity upon germination. This report is the first to describe a noninhibitory function for a serpin in plants.
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Affiliation(s)
- Maja Cohen
- Department of Plant SciencesWeizmann Institute of ScienceRehovotIsrael
| | - Robert Fluhr
- Department of Plant SciencesWeizmann Institute of ScienceRehovotIsrael
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Han Y, Wang J, Li Y, Li H. Purification and Structural Characterization of Protein Z4 from Malt. JOURNAL OF THE AMERICAN SOCIETY OF BREWING CHEMISTS 2018. [DOI: 10.1094/asbcj-2016-2537-01] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Yupeng Han
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China
- Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Jinjing Wang
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China
- Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Yongxian Li
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China
- Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Hao Li
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China
- Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, China
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Goulas T, Ksiazek M, Garcia-Ferrer I, Sochaj-Gregorczyk AM, Waligorska I, Wasylewski M, Potempa J, Gomis-Rüth FX. A structure-derived snap-trap mechanism of a multispecific serpin from the dysbiotic human oral microbiome. J Biol Chem 2017; 292:10883-10898. [PMID: 28512127 PMCID: PMC5491774 DOI: 10.1074/jbc.m117.786533] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Revised: 05/04/2017] [Indexed: 10/19/2022] Open
Abstract
Enduring host-microbiome relationships are based on adaptive strategies within a particular ecological niche. Tannerella forsythia is a dysbiotic member of the human oral microbiome that inhabits periodontal pockets and contributes to chronic periodontitis. To counteract endopeptidases from the host or microbial competitors, T. forsythia possesses a serpin-type proteinase inhibitor called miropin. Although serpins from animals, plants, and viruses have been widely studied, those from prokaryotes have received only limited attention. Here we show that miropin uses the serpin-type suicidal mechanism. We found that, similar to a snap trap, the protein transits from a metastable native form to a relaxed triggered or induced form after cleavage of a reactive-site target bond in an exposed reactive-center loop. The prey peptidase becomes covalently attached to the inhibitor, is dragged 75 Å apart, and is irreversibly inhibited. This coincides with a large conformational rearrangement of miropin, which inserts the segment upstream of the cleavage site as an extra β-strand in a central β-sheet. Standard serpins possess a single target bond and inhibit selected endopeptidases of particular specificity and class. In contrast, miropin uniquely blocked many serine and cysteine endopeptidases of disparate architecture and substrate specificity owing to several potential target bonds within the reactive-center loop and to plasticity in accommodating extra β-strands of variable length. Phylogenetic studies revealed a patchy distribution of bacterial serpins incompatible with a vertical descent model. This finding suggests that miropin was acquired from the host through horizontal gene transfer, perhaps facilitated by the long and intimate association of T. forsythia with the human gingiva.
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Affiliation(s)
- Theodoros Goulas
- From the Proteolysis Lab, Structural Biology Unit, María de Maeztu Unit of Excellence, Molecular Biology Institute of Barcelona, Consejo Superior de Investigaciones Científicas, 08028 Barcelona, Spain
| | - Miroslaw Ksiazek
- the Department of Microbiology, Faculty of Biochemistry, Biophysics and Biotechnology and
- the Department of Oral Immunology and Infectious Diseases, University of Louisville School of Dentistry, Louisville, Kentucky 40202
| | - Irene Garcia-Ferrer
- From the Proteolysis Lab, Structural Biology Unit, María de Maeztu Unit of Excellence, Molecular Biology Institute of Barcelona, Consejo Superior de Investigaciones Científicas, 08028 Barcelona, Spain
| | - Alicja M Sochaj-Gregorczyk
- the Department of Microbiology, Faculty of Biochemistry, Biophysics and Biotechnology and
- the Malopolska Centre of Biotechnology, Jagiellonian University, 30-387 Kraków, Poland, and
| | - Irena Waligorska
- the Department of Microbiology, Faculty of Biochemistry, Biophysics and Biotechnology and
| | - Marcin Wasylewski
- the Department of Microbiology, Faculty of Biochemistry, Biophysics and Biotechnology and
| | - Jan Potempa
- the Department of Microbiology, Faculty of Biochemistry, Biophysics and Biotechnology and
- the Department of Oral Immunology and Infectious Diseases, University of Louisville School of Dentistry, Louisville, Kentucky 40202
| | - F Xavier Gomis-Rüth
- From the Proteolysis Lab, Structural Biology Unit, María de Maeztu Unit of Excellence, Molecular Biology Institute of Barcelona, Consejo Superior de Investigaciones Científicas, 08028 Barcelona, Spain,
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17
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Srikanth S, Chen Z. Plant Protease Inhibitors in Therapeutics-Focus on Cancer Therapy. Front Pharmacol 2016; 7:470. [PMID: 28008315 PMCID: PMC5143346 DOI: 10.3389/fphar.2016.00470] [Citation(s) in RCA: 81] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Accepted: 11/18/2016] [Indexed: 12/28/2022] Open
Abstract
Plants are known to have many secondary metabolites and phytochemical compounds which are highly explored at biochemical and molecular genetics level and exploited enormously in the human health care sector. However, there are other less explored small molecular weight proteins, which inhibit proteases/proteinases. Plants are good sources of protease inhibitors (PIs) which protect them against diseases, insects, pests, and herbivores. In the past, proteinaceous PIs were considered primarily as protein-degrading enzymes. Nevertheless, this view has significantly changed and PIs are now treated as very important signaling molecules in many biological activities such as inflammation, apoptosis, blood clotting and hormone processing. In recent years, PIs have been examined extensively as therapeutic agents, primarily to deal with various human cancers. Interestingly, many plant-based PIs are also found to be effective against cardiovascular diseases, osteoporosis, inflammatory diseases and neurological disorders. Several plant PIs are under further evaluation in in vitro clinical trials. Among all types of PIs, Bowman-Birk inhibitors (BBI) have been studied extensively in the treatment of many diseases, especially in the field of cancer prevention. So far, crops such as beans, potatoes, barley, squash, millet, wheat, buckwheat, groundnut, chickpea, pigeonpea, corn, and pineapple have been identified as good sources of PIs. The PI content of such foods has a significant influence on human health disorders, particularly in the regions where people mostly depend on these kind of foods. These natural PIs vary in concentration, protease specificity, heat stability, and sometimes several PIs may be present in the same species or tissue. However, it is important to carry out individual studies to identify the potential effects of each PI on human health. PIs in plants make them incredible sources to determine novel PIs with specific pharmacological and therapeutic effects due to their peculiarity and superabundance.
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Affiliation(s)
| | - Zhong Chen
- Natural Sciences and Science Education, National Institute of Education, Nanyang Technological UniversitySingapore, Singapore
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18
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Three sorghum serpin recombinant proteins inhibit midgut trypsin activity and growth of corn earworm. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.aggene.2016.09.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Grosse-Holz FM, van der Hoorn RAL. Juggling jobs: roles and mechanisms of multifunctional protease inhibitors in plants. THE NEW PHYTOLOGIST 2016; 210:794-807. [PMID: 26800491 DOI: 10.1111/nph.13839] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2015] [Accepted: 12/01/2015] [Indexed: 05/13/2023]
Abstract
Multifunctional protease inhibitors juggle jobs by targeting different enzymes and thereby often controlling more than one biological process. Here, we discuss the biological functions, mechanisms and evolution of three types of multifunctional protease inhibitors in plants. The first type is double-headed inhibitors, which feature two inhibitory sites targeting proteases with different specificities (e.g. Bowman-Birk inhibitors) or even different hydrolases (e.g. α-amylase/protease inhibitors preventing both early germination and seed predation). The second type consists of multidomain inhibitors which evolved by intragenic duplication and are released by processing (e.g. multicystatins and potato inhibitor II, implicated in tuber dormancy and defence, respectively). The third type consists of promiscuous inhibitory folds which resemble mouse traps that can inhibit different proteases cleaving the bait they offer (e.g. serpins, regulating cell death, and α-macroglobulins). Understanding how multifunctional inhibitors juggle biological jobs increases our knowledge of the connections between the networks they regulate. These examples show that multifunctionality evolved independently from a remarkable diversity of molecular mechanisms that can be exploited for crop improvement and provide concepts for protein design.
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Affiliation(s)
- Friederike M Grosse-Holz
- Plant Chemetics Laboratory, Department of Plant Sciences, University of Oxford, South Parks Road, Oxford, OX1 3RB, UK
| | - Renier A L van der Hoorn
- Plant Chemetics Laboratory, Department of Plant Sciences, University of Oxford, South Parks Road, Oxford, OX1 3RB, UK
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20
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Characterization, biomedical and agricultural applications of protease inhibitors: A review. Int J Biol Macromol 2016; 91:1120-33. [PMID: 26955746 DOI: 10.1016/j.ijbiomac.2016.02.069] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2015] [Revised: 02/24/2016] [Accepted: 02/26/2016] [Indexed: 01/19/2023]
Abstract
This review describes Protease Inhibitors (PIs) which target or inhibit proteases, protein digesting enzymes. These proteases play a crucial task in many biological events including digestion, blood coagulation, apoptosis etc. Regardless of their crucial roles, they need to be checked regularly by PIs as their excess may possibly damage host organism. On basis of amino acid composition of PIs where Protease-PI enzymatic reactions occur i.e. serine, cysteine, and aspartic acid, they are classified. Nowadays, various PIs are being worked upon to fight various parasitic or viral diseases including malaria, schistosomiasis, colds, flu', dengue etc. They prevent an ongoing process begun by carcinogen exposure by keeping a check on metastasis. They also possess potential to reduce carcinogen-induced, increased levels of gene amplification to almost normal levels. Some PIs can principally be used for treatment of hypertension and congestive heart failure by blocking conversion of angiotensin I to angiotensin II for example Angiotensin-converting enzyme inhibitors (ACEIs). Also PIs target amyloid β-peptide (Aβ) level in brain which is prime responsible for development of Alzheimer's Disease (AD). Also, PIs inhibit enzymatic activity of HIV-1 Protease Receptor (PR) by preventing cleavage events in Gag and Gag-Pol that result in production of non-virulent virus particles.
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Ksiazek M, Mizgalska D, Enghild JJ, Scavenius C, Thogersen IB, Potempa J. Miropin, a novel bacterial serpin from the periodontopathogen Tannerella forsythia, inhibits a broad range of proteases by using different peptide bonds within the reactive center loop. J Biol Chem 2014; 290:658-70. [PMID: 25389290 DOI: 10.1074/jbc.m114.601716] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
All prokaryotic genes encoding putative serpins identified to date are found in environmental and commensal microorganisms, and only very few prokaryotic serpins have been investigated from a mechanistic standpoint. Herein, we characterized a novel serpin (miropin) from the human pathogen Tannerella forsythia, a bacterium implicated in initiation and progression of human periodontitis. In contrast to other serpins, miropin efficiently inhibited a broad range of proteases (neutrophil and pancreatic elastases, cathepsin G, subtilisin, and trypsin) with a stoichiometry of inhibition of around 3 and second-order association rate constants that ranged from 2.7 × 10(4) (cathepsin G) to 7.1 × 10(5) m(-1)s(-1) (subtilisin). Inhibition was associated with the formation of complexes that were stable during SDS-PAGE. The unusually broad specificity of miropin for target proteases is achieved through different active sites within the reactive center loop upstream of the P1-P1' site, which was predicted from an alignment of the primary structure of miropin with those of well studied human and prokaryotic serpins. Thus, miropin is unique among inhibitory serpins, and it has apparently evolved the ability to inhibit a multitude of proteases at the expense of a high stoichiometry of inhibition and a low association rate constant. These characteristics suggest that miropin arose as an adaptation to the highly proteolytic environment of subgingival plaque, which is exposed continually to an array of host proteases in the inflammatory exudate. In such an environment, miropin may function as an important virulence factor by protecting bacterium from the destructive activity of neutrophil serine proteases. Alternatively, it may act as a housekeeping protein that regulates the activity of endogenous T. forsythia serine proteases.
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Affiliation(s)
- Miroslaw Ksiazek
- From the Department of Microbiology, Faculty of Biochemistry, Biophysics, and Biotechnology, Jagiellonian University, 30-387 Krakow, Poland,
| | - Danuta Mizgalska
- From the Department of Microbiology, Faculty of Biochemistry, Biophysics, and Biotechnology, Jagiellonian University, 30-387 Krakow, Poland
| | - Jan J Enghild
- Center for Insoluble Protein Structures (inSPIN) and Interdisciplinary Nanoscience Center (iNANO) at the Department of Molecular Biology and Genetics, Aarhus University, Aarhus DK-8000, Denmark, and
| | - Carsten Scavenius
- Center for Insoluble Protein Structures (inSPIN) and Interdisciplinary Nanoscience Center (iNANO) at the Department of Molecular Biology and Genetics, Aarhus University, Aarhus DK-8000, Denmark, and
| | - Ida B Thogersen
- Center for Insoluble Protein Structures (inSPIN) and Interdisciplinary Nanoscience Center (iNANO) at the Department of Molecular Biology and Genetics, Aarhus University, Aarhus DK-8000, Denmark, and
| | - Jan Potempa
- From the Department of Microbiology, Faculty of Biochemistry, Biophysics, and Biotechnology, Jagiellonian University, 30-387 Krakow, Poland, Department of Oral Immunology and Infectious Diseases, University of Louisville School of Dentistry, Louisville, Kentucky 40202
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Specker C, Niessen L, Vogel RF. In vitrostudies on the main beer protein Z4 ofHordeum vulgareconcerning heat stability, protease inhibition and gushing. JOURNAL OF THE INSTITUTE OF BREWING 2014. [DOI: 10.1002/jib.118] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Claudia Specker
- Lehrstuhl für Technische Mikrobiologie; Technische Universität München; Gregor-Mendel-Str. 4 85354 Freising Germany
| | - Ludwig Niessen
- Lehrstuhl für Technische Mikrobiologie; Technische Universität München; Gregor-Mendel-Str. 4 85354 Freising Germany
| | - Rudi F. Vogel
- Lehrstuhl für Technische Mikrobiologie; Technische Universität München; Gregor-Mendel-Str. 4 85354 Freising Germany
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Sheehan MC, Skerritt JH. IDENTIFICATION AND CHARACTERISATION OF BEER POLYPEPTIDES DERIVED FROM BARLEY HORDEINS. JOURNAL OF THE INSTITUTE OF BREWING 2013. [DOI: 10.1002/j.2050-0416.1997.tb00960.x] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Leisegang R, Stahl U. Degradation of a Foam-Promoting Barley Protein by a Proteinase from Brewing Yeast. JOURNAL OF THE INSTITUTE OF BREWING 2012. [DOI: 10.1002/j.2050-0416.2005.tb00656.x] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Francis SE, Ersoy RA, Ahn JW, Atwell BJ, Roberts TH. Serpins in rice: protein sequence analysis, phylogeny and gene expression during development. BMC Genomics 2012; 13:449. [PMID: 22947050 PMCID: PMC3534287 DOI: 10.1186/1471-2164-13-449] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2012] [Accepted: 03/19/2012] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Most members of the serpin family of proteins are potent, irreversible inhibitors of specific serine or cysteine proteinases. Inhibitory serpins are distinguished from members of other families of proteinase inhibitors by their metastable structure and unique suicide-substrate mechanism. Animal serpins exert control over a remarkable diversity of physiological processes including blood coagulation, fibrinolysis, innate immunity and aspects of development. Relatively little is known about the complement of serpin genes in plant genomes and the biological functions of plant serpins. RESULTS A structurally refined amino-acid sequence alignment of the 14 full-length serpins encoded in the genome of the japonica rice Oryza sativa cv. Nipponbare (a monocot) showed a diversity of reactive-centre sequences (which largely determine inhibitory specificity) and a low degree of identity with those of serpins in Arabidopsis (a eudicot). A new convenient and functionally informative nomenclature for plant serpins in which the reactive-centre sequence is incorporated into the serpin name was developed and applied to the rice serpins. A phylogenetic analysis of the rice serpins provided evidence for two main clades and a number of relatively recent gene duplications. Transcriptional analysis showed vastly different levels of basal expression among eight selected rice serpin genes in callus tissue, during seedling development, among vegetative tissues of mature plants and throughout seed development. The gene OsSRP-LRS (Os03g41419), encoding a putative orthologue of Arabidopsis AtSerpin1 (At1g47710), was expressed ubiquitously and at high levels. The second most highly expressed serpin gene was OsSRP-PLP (Os11g11500), encoding a non-inhibitory serpin with a surprisingly well-conserved reactive-centre loop (RCL) sequence among putative orthologues in other grass species. CONCLUSIONS The diversity of reactive-centre sequences among the putatively inhibitory serpins of rice point to a range of target proteases with different proteolytic specificities. Large differences in basal expression levels of the eight selected rice serpin genes during development further suggest a range of functions in regulation and in plant defence for the corresponding proteins.
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Affiliation(s)
- Sheila E Francis
- Department of Chemistry and Biomolecular Sciences, Macquarie University, North Ryde, NSW, 2109, Australia
| | - Renan A Ersoy
- Department of Chemistry and Biomolecular Sciences, Macquarie University, North Ryde, NSW, 2109, Australia
| | - Joon-Woo Ahn
- Department of Chemistry and Biomolecular Sciences, Macquarie University, North Ryde, NSW, 2109, Australia
- Green Bio Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 111 Gwahangno, Yuseong-gu, Daejeon, 305-806, Korea
| | - Brian J Atwell
- Department of Biological Sciences, Macquarie University, North Ryde, NSW, 2109, Australia
| | - Thomas H Roberts
- Department of Chemistry and Biomolecular Sciences, Macquarie University, North Ryde, NSW, 2109, Australia
- Department of Plant and Food Sciences, Faculty of Agriculture and Environment, University of Sydney, Sydney, NSW, 2006, Australia
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Evans D, Sheehan M, Stewart D. The Impact of Malt Derived Proteins on Beer Foam Quality. Part II: The Influence of Malt Foam-positive Proteins and Non-starch Polysaccharides on Beer Foam Quality. JOURNAL OF THE INSTITUTE OF BREWING 2012. [DOI: 10.1002/j.2050-0416.1999.tb00016.x] [Citation(s) in RCA: 89] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Evans D, Hejgaard J. The Impact of Malt Derived Proteins on Beer Foam Quality. Part I. The Effect of Germination and Kilning on the Level of Protein Z4, Protein Z7 and LTP1. JOURNAL OF THE INSTITUTE OF BREWING 2012. [DOI: 10.1002/j.2050-0416.1999.tb00015.x] [Citation(s) in RCA: 89] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Abstract
Protease inhibitors of the serpin family are ubiquitous in the plant kingdom but relatively little is known about their biological functions in comparison with their counterparts in animals. X-ray crystal structures have provided crucial insights into animal serpin functions. The recently solved structure of AtSerpin1 from Arabidopsis thaliana, which has the highly conserved reactive center P2-P1' Leu-Arg-Xaa (Xaa = small residue), displays both conserved and plant-specific serpin features. Sequence homology suggests that AtSerpin1 belongs to serpin Clade B, composed of intracellular mammalian serpins, which is consistent with the lack of strong evidence for secretion of serpins from plant cells. The major in vivo target protease for AtSerpin1 is the papain-like cysteine RD21 protease, a match reminiscent of the inhibition of cathepsins K, L and S by the Clade-B mammalian serpin, SCCA-1 (SERPINB3). The function of AtSerpin1 and other serpins that contain P2-P1' Leu-Arg-Xaa (the 'LR' serpins) in plants remains unknown. However, based on its homology and interactive partners, AtSerpin1 and perhaps other serpins are likely to be involved in regulating programmed cell death or associated processes such as senescence. Abundant accumulation of serpins in seeds and their presence in phloem sap suggest additional functions in plant defense by irreversible inhibition of digestive proteases from pests or pathogens. Here we review the most recent findings in plant serpin biology, focusing on advances in describing the structure and inhibitory specificity of the LR serpins.
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Affiliation(s)
- Robert Fluhr
- Department of Plant Sciences, Weizmann Institute of Science, Rehovot 76100, Israel.
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Iimure T, Kimura T, Araki S, Kihara M, Sato M, Yamada S, Shigyou T, Sato K. Mutation analysis of barley malt protein Z4 and protein Z7 on beer foam stability. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2012; 60:1548-54. [PMID: 22251057 DOI: 10.1021/jf2044718] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Beer foam stability is an important characteristic. It has been suggested that isoforms of protein Z, that is, protein Z4 and protein Z7, contribute to beer foam stability. We investigated the relationship between beer foam stability and protein Z4 and protein Z7 using their deficient mutants. As a protein Z4-deficient mutant, cv. Pirkka was used. Protein Z7 deficiency was screened in 1564 barley accessions in the world collection of Okayama University, Japan. The barley samples from normal, protein Z4-deficient, protein Z7-deficient, and double-deficient were genotyped in F(2) populations and then pooled based on the DNA marker genotypes of protein Z4 and protein Z7. For a brewing trial, F(5) pooled subpopulations were used. After malting and brewing, the foam stability was determined, and the results showed that the levels of foam stability in the four samples were comparable. Two-dimensional gel electrophoresis was used to investigate the proteome in these beer samples. The results showed that low molecular weight proteins, including lipid transfer protein (LTP2), in the deficient mutants were higher than those in the normal sample. Our results suggest that the contribution of protein Z4 and protein Z7 to beer foam stability was not greater than that of other beer proteins.
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Affiliation(s)
- Takashi Iimure
- Bioresources Research and Development Department, Sapporo Breweries Ltd., 37-1, Nittakizaki, Ota, Gunma 370-0393, Japan.
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Alvarez-Alfageme F, Maharramov J, Carrillo L, Vandenabeele S, Vercammen D, Van Breusegem F, Smagghe G. Potential use of a serpin from Arabidopsis for pest control. PLoS One 2011; 6:e20278. [PMID: 21655276 PMCID: PMC3104999 DOI: 10.1371/journal.pone.0020278] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2011] [Accepted: 04/25/2011] [Indexed: 12/20/2022] Open
Abstract
Although genetically modified (GM) plants expressing toxins from Bacillus thuringiensis (Bt) protect agricultural crops against lepidopteran and coleopteran pests, field-evolved resistance to Bt toxins has been reported for populations of several lepidopteran species. Moreover, some important agricultural pests, like phloem-feeding insects, are not susceptible to Bt crops. Complementary pest control strategies are therefore necessary to assure that the benefits provided by those insect-resistant transgenic plants are not compromised and to target those pests that are not susceptible. Experimental GM plants producing plant protease inhibitors have been shown to confer resistance against a wide range of agricultural pests. In this study we assessed the potential of AtSerpin1, a serpin from Arabidopsis thaliana (L). Heynh., for pest control. In vitro assays were conducted with a wide range of pests that rely mainly on either serine or cysteine proteases for digestion and also with three non-target organisms occurring in agricultural crops. AtSerpin1 inhibited proteases from all pest and non-target species assayed. Subsequently, the cotton leafworm Spodoptera littoralis Boisduval and the pea aphid Acyrthosiphon pisum (Harris) were fed on artificial diets containing AtSerpin1, and S. littoralis was also fed on transgenic Arabidopsis plants overproducing AtSerpin1. AtSerpin1 supplied in the artificial diet or by transgenic plants reduced the growth of S. littoralis larvae by 65% and 38%, respectively, relative to controls. Nymphs of A. pisum exposed to diets containing AtSerpin1 suffered high mortality levels (LC50 = 637 µg ml−1). The results indicate that AtSerpin1 is a good candidate for exploitation in pest control.
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Affiliation(s)
- Fernando Alvarez-Alfageme
- Laboratory of Agrozoology, Department of Crop Protection, Faculty of Bioscience Engineering, Ghent University, Gent, Belgium
- * E-mail: (F-AA); (GS)
| | - Jafar Maharramov
- Laboratory of Agrozoology, Department of Crop Protection, Faculty of Bioscience Engineering, Ghent University, Gent, Belgium
| | - Laura Carrillo
- Laboratory of Agrozoology, Department of Crop Protection, Faculty of Bioscience Engineering, Ghent University, Gent, Belgium
| | - Steven Vandenabeele
- VIB Department of Plant Systems Biology, Ghent University, Gent, Belgium
- Department of Plant Biotechnology and Genetics, Ghent University, Gent, Belgium
| | - Dominique Vercammen
- VIB Department of Plant Systems Biology, Ghent University, Gent, Belgium
- Department of Plant Biotechnology and Genetics, Ghent University, Gent, Belgium
| | - Frank Van Breusegem
- VIB Department of Plant Systems Biology, Ghent University, Gent, Belgium
- Department of Plant Biotechnology and Genetics, Ghent University, Gent, Belgium
| | - Guy Smagghe
- Laboratory of Agrozoology, Department of Crop Protection, Faculty of Bioscience Engineering, Ghent University, Gent, Belgium
- * E-mail: (F-AA); (GS)
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Steiner E, Gastl M, Becker T. Protein changes during malting and brewing with focus on haze and foam formation: a review. Eur Food Res Technol 2011. [DOI: 10.1007/s00217-010-1412-6] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Iimure T, Kihara M, Ichikawa S, Ito K, Takeda K, Sato K. Development of DNA markers associated with beer foam stability for barley breeding. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2011; 122:199-210. [PMID: 20827457 DOI: 10.1007/s00122-010-1436-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2010] [Accepted: 08/25/2010] [Indexed: 05/29/2023]
Abstract
Traits conferring brewing quality are important objectives in malting barley breeding. Beer foam stability is one of the more difficult traits to evaluate due to the requirement for a relatively large amount of grain to be malted and then the experimental costs for subsequent brewing trials. Consequently, foam stability tends to be evaluated with only advanced lines in the final stages of the breeding process. To simplify the evaluation and selection for this trait, efficient DNA makers were developed in this study. Previous studies have suggested that the level of both of the foam-associated proteins Z4 and Z7 were possible factors that influenced beer foam stability. To confirm the relationship between levels of these proteins in beer and foam stability, 24 beer samples prepared from malt made from 10 barley cultivars, were examined. Regression analyses suggested that beer proteins Z4 and Z7 could be positive and negative markers for beer foam stability, respectively. To develop DNA markers associated with contents of proteins Z4 and Z7 in barley grain, nucleotide sequence polymorphisms in barley cultivars in the upstream region of the translation initiation codon, where the promoter region might be located were compared. As a result, 5 and 23 nucleotide sequence polymorphisms were detected in protein Z4 and protein Z7, respectively. By using these polymorphisms, cleaved amplified polymorphic sequence (CAPS) markers were developed. The CAPS markers for proteins Z4 and Z7 were applied to classify the barley grain content of 23 barley cultivars into two protein Z4 (pZ4-H and pZ4-L) and three protein Z7 (the pZ7-H, pZ7-L and pZ7-L2) haplotypes, respectively. Barley cultivars with pZ4-H showed significantly higher levels of protein Z4 in grain, and those with pZ7-L and pZ7-L2 showed significantly lower levels of protein Z7 in grain. Beer foam stability in the cultivars with pZ4-H and pZ7-L was significantly higher than that with pZ4-L and pZ7-H, respectively. Our results indicate that these CAPS markers provide an efficient selection tool for beer foam stability in barley breeding programs.
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Affiliation(s)
- Takashi Iimure
- Bioresources Research and Development Department, Sapporo Breweries Ltd., 37-1, Nittakizaki, Ota, Gunma, 370-0393, Japan.
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Fang EF, Hassanien AAE, Wong JH, Bah CSF, Soliman SS, Ng TB. Purification and modes of antifungal action by Vicia faba cv. Egypt trypsin inhibitor. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2010; 58:10729-35. [PMID: 20836498 DOI: 10.1021/jf102277k] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
A new 15 kDa Bowman-Birk type trypsin inhibitor (termed VFTI-E1) from fava beans (Vicia faba cv. Egypt 1) was isolated using liquid chromatography. Though it exhibited substantial homology in N-terminal amino acid sequence to other protease inhibitors, VFTI-E1 showed antiproteolytic activity against trypsin (K(i) 11.9 × 10(-9) M) but hardly any activity against chymotrypsin. It demonstrated antifungal activity toward the filamentous fungus Valsa mali with an IC(50) of 20 μM. The mechanism of its antifungal action toward V. mali included (1) induction of alteration of hyphal morphology, (2) growth inhibition by chitin deposition at hyphal tips, and (3) permeabilization of fungal membrane. The antifungal activity of VFTI-E1 was dependent on the ambient ionic strength as increasing concentrations of NaCl, CaCl(2), and MgCl(2) diminished the activity. The membranolytic action of VFTI-E1 was confined to fungus, but not exerted on human and rabbit erythrocytes. This study sheds light on the mode of hyphal growth inhibitory activity of protease inhibitors with antifungal activity. The antifungal activity of VFTI-E1 amplifies the scope of its potential applications.
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Affiliation(s)
- Evandro Fei Fang
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, Hong Kong, China
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Fang EF, Wong JH, Bah CSF, Lin P, Tsao SW, Ng TB. Bauhinia variegata var. variegata trypsin inhibitor: From isolation to potential medicinal applications. Biochem Biophys Res Commun 2010; 396:806-11. [DOI: 10.1016/j.bbrc.2010.04.140] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2010] [Accepted: 04/27/2010] [Indexed: 10/19/2022]
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Lampl N, Budai-Hadrian O, Davydov O, Joss TV, Harrop SJ, Curmi PMG, Roberts TH, Fluhr R. Arabidopsis AtSerpin1, crystal structure and in vivo interaction with its target protease RESPONSIVE TO DESICCATION-21 (RD21). J Biol Chem 2010; 285:13550-60. [PMID: 20181955 DOI: 10.1074/jbc.m109.095075] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
In animals, protease inhibitors of the serpin family are associated with many physiological processes, including blood coagulation and innate immunity. Serpins feature a reactive center loop (RCL), which displays a protease target sequence as a bait. RCL cleavage results in an irreversible, covalent serpin-protease complex. AtSerpin1 is an Arabidopsis protease inhibitor that is expressed ubiquitously throughout the plant. The x-ray crystal structure of recombinant AtSerpin1 in its native stressed conformation was determined at 2.2 A. The electrostatic surface potential below the RCL was found to be highly positive, whereas the breach region critical for RCL insertion is an unusually open structure. AtSerpin1 accumulates in plants as a full-length and a cleaved form. Fractionation of seedling extracts by nonreducing SDS-PAGE revealed the presence of an additional slower migrating complex that was absent when leaves were treated with the specific cysteine protease inhibitor L-trans-epoxysuccinyl-L-leucylamido (4-guanidino)butane. Significantly, RESPONSIVE TO DESICCATION-21 (RD21) was the major protease labeled with the L-trans-epoxysuccinyl-L-leucylamido (4-guanidino)butane derivative DCG-04 in wild type extracts but not in extracts of mutant plants constitutively overexpressing AtSerpin1, indicating competition. Fractionation by nonreducing SDS-PAGE followed by immunoblotting with RD21-specific antibody revealed that the protease accumulated both as a free enzyme and in a complex with AtSerpin1. Importantly, both RD21 and AtSerpin1 knock-out mutants lacked the serpin-protease complex. The results establish that the major Arabidopsis plant serpin interacts with RD21. This is the first report of the structure and in vivo interaction of a plant serpin with its target protease.
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Affiliation(s)
- Nardy Lampl
- Department of Plant Sciences, Weizmann Institute of Science, Rehovot 76100, Israel
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Identification of thioredoxin target disulfides in proteins released from barley aleurone layers. J Proteomics 2010; 73:1133-6. [PMID: 20114090 DOI: 10.1016/j.jprot.2010.01.007] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2009] [Revised: 12/23/2009] [Accepted: 01/11/2010] [Indexed: 11/22/2022]
Abstract
Thioredoxins are ubiquitous disulfide reductases involved in a wide range of cellular processes including DNA synthesis, oxidative stress response and apoptosis. In cereal seeds thioredoxins are proposed to facilitate the germination process by reducing disulfide bonds in storage proteins and other targets in the starchy endosperm. Here we have applied a thiol-specific labeling approach to identify specific disulfide targets of barley thioredoxin in proteins released from barley aleurone layers incubated in buffer containing gibberellic acid.
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Mazanec K, Bobalova J, Šlais K. Divergent flow isoelectric focusing: fast and efficient method for protein sample preparation for mass spectrometry. Anal Bioanal Chem 2009; 393:1769-78. [DOI: 10.1007/s00216-009-2600-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2008] [Revised: 12/19/2008] [Accepted: 01/05/2009] [Indexed: 11/29/2022]
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Chemical Composition in Barley Grains and Malt Quality. ADVANCED TOPICS IN SCIENCE AND TECHNOLOGY IN CHINA 2009. [DOI: 10.1007/978-3-642-01279-2_3] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Serpins in plants and green algae. Funct Integr Genomics 2007; 8:1-27. [PMID: 18060440 DOI: 10.1007/s10142-007-0059-2] [Citation(s) in RCA: 81] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2007] [Revised: 09/06/2007] [Accepted: 09/15/2007] [Indexed: 01/02/2023]
Abstract
Control of proteolysis is important for plant growth, development, responses to stress, and defence against insects and pathogens. Members of the serpin protein family are likely to play a critical role in this control through irreversible inhibition of endogenous and exogenous target proteinases. Serpins have been found in diverse species of the plant kingdom and represent a distinct clade among serpins in multicellular organisms. Serpins are also found in green algae, but the evolutionary relationship between these serpins and those of plants remains unknown. Plant serpins are potent inhibitors of mammalian serine proteinases of the chymotrypsin family in vitro but, intriguingly, plants and green algae lack endogenous members of this proteinase family, the most common targets for animal serpins. An Arabidopsis serpin with a conserved reactive centre is now known to be capable of inhibiting an endogenous cysteine proteinase. Here, knowledge of plant serpins in terms of sequence diversity, inhibitory specificity, gene expression and function is reviewed. This was advanced through a phylogenetic analysis of amino acid sequences of expressed plant serpins, delineation of plant serpin gene structures and prediction of inhibitory specificities based on identification of reactive centres. The review is intended to encourage elucidation of plant serpin functions.
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Bobalova J, Chmelik J. Proteomic identification of technologically modified proteins in malt by combination of protein fractionation using convective interaction media and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry. J Chromatogr A 2007; 1163:80-5. [PMID: 17586515 DOI: 10.1016/j.chroma.2007.06.006] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2007] [Revised: 05/31/2007] [Accepted: 06/05/2007] [Indexed: 11/20/2022]
Abstract
A method for the fast separation of proteins and identification of their modifications based on the use of monolithic chromatographic media and mass spectrometric techniques is described. This method has been developed and applied to the analysis of malt proteins and its posttranslational modifications (glycation). Glycation, one of the most common forms of posttranslational modifications (PTM), can be detected in both biological and industrial samples. Our attention was focused on the investigations of possible chemical modifications of water-soluble barley proteins during malting process by combination of anion-exchange chromatography with matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS). The malt extract was directly fractioned by anion-exchange chromatography using short monolithic columns and a linear gradient from 0 to 700 mM NaCl. Sufficient fractionation was obtained for malt sample, which demonstrates the potential of anion-exchange chromatography on this type of column. Proteins in separated fractions were identified by MALDI-TOF/TOF MS. Our proteomic analysis provided the identification of the major proteins present in the malt that were found to be heterogeneously glycated after malting. One of these proteins: nonspecific lipid transfer protein 1 (LTP1) can be used as a marker for characterization of glycation during malting. This protein and its modifications can be easily determined by the developed method.
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Affiliation(s)
- Janette Bobalova
- Research Centre for Study of Extract Compounds of Barley and Hop, Institute of Analytical Chemistry, vvi, Academy of Sciences of the Czech Republic, Veverí 97, CZ-602 00 Brno, Czech Republic
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Vercammen D, Belenghi B, van de Cotte B, Beunens T, Gavigan JA, De Rycke R, Brackenier A, Inzé D, Harris JL, Van Breusegem F. Serpin1 of Arabidopsis thaliana is a Suicide Inhibitor for Metacaspase 9. J Mol Biol 2006; 364:625-36. [PMID: 17028019 DOI: 10.1016/j.jmb.2006.09.010] [Citation(s) in RCA: 127] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2006] [Revised: 08/31/2006] [Accepted: 09/01/2006] [Indexed: 01/05/2023]
Abstract
Metacaspases are distant relatives of animal caspases found in plants, fungi and protozoa. We demonstrated previously that two type II metacaspases of Arabidopsis thaliana, AtMC4 and AtMC9 are Arg/Lys-specific cysteine-dependent proteases. We screened a combinatorial tetrapeptide library of 130,321 substrates with AtMC9. Here, we show that AtMC9 is a strict Arg/Lys-specific protease. Based on the position-specific scoring matrix derived from the substrate library results, the tetrapeptide Val-Arg-Pro-Arg was identified as an optimized substrate. AtMC9 had a kcat/KM of 4.6x10(5) M-1 s-1 for Ac-Val-Arg-Pro-Arg-amido-4-methyl-coumarin, representing a more than 10-fold improvement over existing fluorogenic substrates. A yeast two-hybrid screen with catalytically inactive AtMC9 as bait identified a serine protease inhibitor, designated AtSerpin1, which was found to be a potent inhibitor of AtMC9 activity in vitro through cleavage of its reactive center loop and covalent binding to AtMC9. On the basis of the substrate profiling of AtMC9 and confirmation through site-directed mutagenesis, the inhibitory P4-P1 cleavage site of AtSerpin1 was determined to be Ile-Lys-Leu-Arg351. Further mutagenesis of the AtSerpin1 inhibitory cleavage site modulated AtMC9 inhibition positively or negatively. Both AtMC9 and AtSerpin1 were localized in the extracellular space, suggesting an in vivo interaction as well. To our knowledge, this is the first report of plant protease inhibition by a plant serpin.
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Affiliation(s)
- Dominique Vercammen
- Department of Plant Systems Biology, Flanders Interuniversity Institute for Biotechnology, Ghent University, B-9052 Gent, Belgium
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Hejgaard J. Inhibitory plant serpins with a sequence of three glutamine residues in the reactive center. Biol Chem 2006; 386:1319-23. [PMID: 16336127 DOI: 10.1515/bc.2005.150] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Serpins appear to be ubiquitous in eukaryotes, except fungi, and are also present in some bacteria, archaea and viruses. Inhibitory serpins with a glutamine as the reactive-center P1 residue have been identified exclusively in a few plant species. Unique serpins with a reactive center sequence of three Gln residues at P3-P1 or P2-P1' were isolated from barley and wheat grain, respectively. Barley BSZ3 was an irreversible inhibitor of chymotrypsin, with a second-order association rate constant for complex formation k(a)' of the order of 10(4) M(-1) s(-1); however, only a minor fraction of the serpin molecules reacted with chymotrypsin, with the majority insensitive to cleavage in the reactive center loop. Wheat WSZ3 was cleaved specifically at P8 Thr and was not an inhibitor of chymotrypsin. These reactive-center loops may have evolved conformations that are optimal as inhibitory baits for proeinases that specifically degrade storage prolamins containing Gln-rich repetitive sequences, most likely for digestive proteinases of insect pests or fungal pathogens that infect cereals. An assembled full-length amino acid sequence of a serpin expressed in cotton boll fiber (GaZ1) included conserved regions essential for serpin-proteinase interaction, suggesting inhibitory capacity at a putative reactive center P2-P2' with a sequence of four Gln residues.
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Affiliation(s)
- Jørn Hejgaard
- Biochemistry and Nutrition Group, BioCentrum, Technical University of Denmark, Bldg 224, DK-2800 Lyngby, Denmark.
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la Cour Petersen M, Hejgaard J, Thompson GA, Schulz A. Cucurbit phloem serpins are graft-transmissible and appear to be resistant to turnover in the sieve element-companion cell complex. JOURNAL OF EXPERIMENTAL BOTANY 2005; 56:3111-20. [PMID: 16246856 DOI: 10.1093/jxb/eri308] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Serpins are unique inhibitors of serine proteases that are located in various plant tissues and organs. An orthologue of the pumpkin (Cucurbita maxima) phloem serpin CmPS-1 was amplified from cucumber (Cucumis sativus) RNA by RT-PCR, cloned, and designated as CsPS-1 (GenBank accession no. AJ866989). Alternative amino acid sequences in the reactive centre loop suggest distinct inhibitory specificity between CmPS-1 and CsPS-1. A difference in the electrophoretic mobility of these serpins was used in heterografts to establish that serpins are phloem-mobile. Immuno light microscopy revealed that the phloem serpins are localized exclusively to sieve elements (SE), while the phloem filament protein CmPP1, used as a reference, is localized to both SEs and companion cells (CCs). Similar to CmPS-1, CsPS-1 accumulates over time in phloem exudates, indicating that serpins differ from other phloem-mobile proteins whose concentrations appear to be stable in phloem exudates. These differences could reflect alternative mechanisms regulating protein turnover and/or inaccessibility of protein degradation. The functionality of the pore/plasmodesma units connecting SEs and CCs was tested with graft-transmitted CmPP1 as a transport marker. The occurrence of CmPP1 in the CCs of the Cucumis graft partner shows that translocated 88 kDa phloem filament protein monomers can symplasmically exit the SE and accumulate in the CC. By contrast, serial sections probed with the serpin antibody demonstrate that the 43 kDa serpin does not enter CCs. Collectively, these data indicate that CCs play a decisive role in homeostasis of exudate proteins; proteins not accessing the CCs accumulate in SEs and display a time-dependent increase in concentration.
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Affiliation(s)
- Mette la Cour Petersen
- Department of Plant Biology, Royal Veterinary and Agricultural University (KVL), Thorvaldsensvej 40, DK-1871 Frederiksberg C, Denmark
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Hejgaard J, Laing WA, Marttila S, Gleave AP, Roberts TH. Serpins in fruit and vegetative tissues of apple (Malus domestica): expression of four serpins with distinct reactive centres and characterisation of a major inhibitory seed form, MdZ1b. FUNCTIONAL PLANT BIOLOGY : FPB 2005; 32:517-527. [PMID: 32689152 DOI: 10.1071/fp04220] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2004] [Accepted: 04/12/2005] [Indexed: 06/11/2023]
Abstract
Most serpins irreversibly inhibit serine proteinases of the chymotrypsin family using a suicide-substrate-based mechanism. Serpins are present in all domains of life, but physiological functions in the plant kingdom are yet to be elucidated. Inhibitory properties of many abundant cereal grain serpins are well characterised, but serpins have not been identified in eudicot seeds. In apple (Malus domestica Borkh.), the origin of 88 serpin expressed sequence tags (ESTs) identified among 160 000 ESTs from 30 cultivar-, tissue- and time-specific libraries showed that serpin genes are expressed in a wide variety of tissues, including developing and mature fruits, seeds and vegetative buds as well as developing, mature and senescing leaves. Analysis of 46 sequences, most full-length, identified serpins with four distinct reactive centres belonging to two subfamilies (MdZ1 and MdZ2) with ~85% amino acid sequence identity. MdZ1 included three molecular forms with identical reactive centre loop (RCL) sequences except for three different, but related, residues at P2 (Asp, Asn or Glu). A major seed serpin, MdZ1b, with P2-P1' Glu-Arg-Arg was purified from decorticated seeds and characterised kinetically. MdZ1b was a fast inhibitor of bovine and porcine trypsin (second-order association rate constant k a ~4 × 106 m -1 s-1 and stoichiometry of inhibition SI = 1). Human plasmin and urokinase-type plasminogen activator (u-PA), but not thrombin, were inhibited at lower rates (k a ~104 m -1 s-1). Chymotrypsin was inhibited at the same site (k a~4 × 103 m -1 s-1), but a significant part of MdZ1b was cleaved as substrate (SI > 2). Unexpectedly, the MdZ1b-trypsin complex was relatively short-lived with a first-order dissociation rate constant k d in the order of 10-4 s-1. The bulk of mature seed MdZ1b was localised to the cotyledons. The content of MdZ1b in ripe apples was 5-26 µg per seed, whereas MdZ1b could not be detected in the cortex or skin. Localisation and inhibitory specificity of serpins in monocot and eudicot plants are compared and putative functions are discussed.
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Affiliation(s)
- Jørn Hejgaard
- Biochemistry and Nutrition Group, BioCentrum, Building 224, Technical University of Denmark, DK-2800 Lyngby, Denmark
| | - William A Laing
- Horticulture and Food Research Institute of New Zealand, PB 92169, Auckland, New Zealand
| | - Salla Marttila
- Department of Crop Science, Swedish University of Agricultural Sciences, PO Box 44, SE-23053 Alnarp, Sweden
| | - Andrew P Gleave
- Horticulture and Food Research Institute of New Zealand, PB 92169, Auckland, New Zealand
| | - Thomas H Roberts
- Department of Chemistry and Biomolecular Sciences, Macquarie University, NSW 2109, Australia
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Molecular and biochemical impacts of environmental factors on wheat grain development and protein synthesis. J Cereal Sci 2003. [DOI: 10.1016/s0733-5210(03)00030-4] [Citation(s) in RCA: 266] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Affiliation(s)
- Peter G W Gettins
- Department of Biochemistry & Molecular Genetics, University of Illinois at Chicago, M/C 536, 1819-53 West Polk Street, Chicago, Illinois 60612, USA.
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Hejgaard J, Hauge S. Serpins of oat (Avena sativa) grain with distinct reactive centres and inhibitory specificity. PHYSIOLOGIA PLANTARUM 2002; 116:155-163. [PMID: 12354191 DOI: 10.1034/j.1399-3054.2002.1160204.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Most proteinase inhibitors from plant seeds are assumed to contribute to broad-spectrum protection against pests and pathogens. In oat (Avena sativa L.) grain the main serine proteinase inhibitors were found to be serpins, which utilize a unique mechanism of irreversible inhibition. Four distinct inhibitors of the serpin superfamily were detected by native PAGE as major seed albumins and purified by thiophilic adsorption and anion exchange chromatography. The four serpins OSZa-d are the first proteinase inhibitors characterized from this cereal. An amino acid sequence close to the blocked N-terminus, a reactive centre loop sequence, and the second order association rate constant (ka') for irreversible complex formation with pancreas serine proteinases at 24 degrees C were determined for each inhibitor. OSZa and OSZb, both with the reactive centre scissile bond P1-P1' Thr downward arrow Ser, were efficient inhibitors of pancreas elastase (ka' > 105M-1 s-1). Only OSZb was also an inhibitor of chymotrypsin at the same site (ka' = 0.9 x 105M-1 s-1). OSZc was a fast inhibitor of trypsin at P1-P1' Arg downward arrow Ser (ka' = 4 x 106M-1 s-1); however, the OSZc-trypsin complex was short-lived with a first order dissociation rate constant kd = 1.4 x 10-4 s-1. OSZc was also an inhibitor of chymotrypsin (ka' > 106M-1 s-1), presumably at the overlapping site P2-P1 Ala downward arrow Arg, but > 90% of the serpin was cleaved as substrate. OSZd was cleaved by chymotrypsin at the putative reactive centre bond P1-P1' Tyr downward arrow Ser, and no inhibition was detected. Together the oat grain serpins have a broader inhibitory specificity against digestive serine proteinases than represented by the major serpins of wheat, rye or barley grain. Presumably the serpins compensate for the low content of reversible inhibitors of serine proteinases in oats in protection of the grain against pests or pathogens.
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Affiliation(s)
- Jørn Hejgaard
- Biochemistry and Nutrition, BioCentrum-DTU, Technical University of Denmark, Bldg 224, DK-2800 Lyngby, Denmark
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