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Donelan W, Li S, Dominguez-Gutierrez PR, Anderson Iv A, Yang LJ, Nguyen C, Canales BK. Expression and secretion of glycosylated barley oxalate oxidase in Pichia pastoris. PLoS One 2023; 18:e0285556. [PMID: 37167324 PMCID: PMC10174515 DOI: 10.1371/journal.pone.0285556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Accepted: 04/26/2023] [Indexed: 05/13/2023] Open
Abstract
Oxalate oxidase is an enzyme that degrades oxalate and is used in commercial urinary assays to measure oxalate levels. The objective of this study was to establish an enhanced expression system for secretion and purification of oxalate oxidase using Pichia pastoris. A codon optimized synthetic oxalate oxidase gene derived from Hordeum vulgare (barley) was generated and cloned into the pPICZα expression vector downstream of the N-terminal alpha factor secretion signal peptide sequence and used for expression in P. pastoris X-33 strain. A novel chimeric signal peptide consisting of the pre-OST1 sequence fused to pro-αpp8 containing several amino acid substitutions was also generated to enhance secretion. Active enzyme was purified to greater than 90% purity using Q-Sepharose anion exchange chromatography. The purified oxalate oxidase enzyme had an estimated Km value of 256μM, and activity was determined to be 10U/mg. We have developed an enhanced oxalate oxidase expression system and method for purification.
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Affiliation(s)
- William Donelan
- Department of Urology, College of Medicine, University of Florida, Gainesville, Florida, United States of America
| | - ShiWu Li
- Department of Pathology, Immunology and Laboratory Medicine, College of Medicine, University of Florida, Gainesville, Florida, United States of America
| | - Paul R Dominguez-Gutierrez
- Department of Urology, College of Medicine, University of Florida, Gainesville, Florida, United States of America
| | - Augustus Anderson Iv
- Department of Urology, College of Medicine, University of Florida, Gainesville, Florida, United States of America
| | - Li-Jun Yang
- Department of Pathology, Immunology and Laboratory Medicine, College of Medicine, University of Florida, Gainesville, Florida, United States of America
| | - Cuong Nguyen
- Department of Infectious Diseases and Immunology, College of Veterinary Medicine, University of Florida, Gainesville, Florida, United States of America
| | - Benjamin K Canales
- Department of Urology, College of Medicine, University of Florida, Gainesville, Florida, United States of America
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2
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Rubbab T, Pegg CL, Phung TK, Nouwens AS, Yeo KYB, Zacchi LF, Muhammad A, Naqvi SMS, Schulz BL. N-glycosylation on Oryza sativa root germin-like protein 1 is conserved but not required for stability or activity. Biochem Biophys Res Commun 2021; 553:72-77. [PMID: 33756348 DOI: 10.1016/j.bbrc.2021.03.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Accepted: 03/04/2021] [Indexed: 11/18/2022]
Abstract
Germin and germin-like proteins (GLPs) are a broad family of extracellular glycoproteins ubiquitously distributed in plants. Overexpression of Oryza sativa root germin like protein 1 (OsRGLP1) enhances superoxide dismutase (SOD) activity in transgenic plants. Here, we report bioinformatic analysis and heterologous expression of OsRGLP1 to study the role of glycosylation on OsRGLP1 protein stability and activity. Sequence analysis of OsRGLP1 homologs identified diverse N-glycosylation sequons, one of which was highly conserved. We therefore expressed OsRGLP1 in glycosylation-competent Saccharomyces cerevisiae as a Maltose Binding Protein (MBP) fusion. Mass spectrometry analysis of purified OsRGLP1 showed it was expressed by S. cerevisiae in both N-glycosylated and unmodified forms. Glycoprotein thermal profiling showed little difference in the thermal stability of the glycosylated and unmodified protein forms. Circular Dichroism spectroscopy of MBP-OsRGLP1 and a N-Q glycosylation-deficient variant showed that both glycosylated and unmodified MBP-OsRGLP1 had similar secondary structure, and both forms had equivalent SOD activity. Together, we concluded that glycosylation was not critical for OsRGLP1 protein stability or activity, and it could therefore likely be produced in Escherichia coli without glycosylation. Indeed, we found that OsRGLP1 could be efficiently expressed and purified from K12 shuffle E. coli with a specific activity of 1251 ± 70 Units/mg. In conclusion, we find that some highly conserved N-glycosylation sites are not necessarily required for protein stability or activity, and describe a suitable method for production of OsRGLP1 which paves the way for further characterization and use of this protein.
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Affiliation(s)
- Tehseen Rubbab
- University Institute of Biochemistry and Biotechnology, PMAS-Arid Agriculture University, Rawalpindi, 46300, Pakistan
| | - Cassandra L Pegg
- School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, 4072, Australia
| | - Toan K Phung
- School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, 4072, Australia
| | - Amanda S Nouwens
- School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, 4072, Australia
| | - K Y Benjamin Yeo
- School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, 4072, Australia
| | - Lucia F Zacchi
- Centre for Biopharmaceutical Innovation, Australian Institute of Bioengineering and Nanotechnology, The University of Queensland, St Lucia, 4072, Queensland, Australia
| | - Amna Muhammad
- University Institute of Biochemistry and Biotechnology, PMAS-Arid Agriculture University, Rawalpindi, 46300, Pakistan
| | - S M Saqlan Naqvi
- Uswa Institute of Higher Education, Saif Ali Education Complex, Japan Road, Islamabad, 45750, Pakistan
| | - Benjamin L Schulz
- School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, 4072, Australia; Centre for Biopharmaceutical Innovation, Australian Institute of Bioengineering and Nanotechnology, The University of Queensland, St Lucia, 4072, Queensland, Australia.
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3
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Ilyas M, Irfan M, Mahmood T, Hussain H, Latif-ur-Rehman, Naeem I, Khaliq-ur-Rahman. Analysis of Germin-like Protein Genes (OsGLPs) Family in Rice Using Various In silico Approaches. Curr Bioinform 2020. [DOI: 10.2174/1574893614666190722165130] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Background:
Germin-like Proteins (GLPs) play an important role in various stresses.
Rice contains 43 GLPs, among which many remain functionally unexplored. The computational
analysis will provide significant insight into their function.
Objective:
To find various structural properties, functional importance, phylogeny and expression
pattern of all OsGLPs using various bioinformatics tools.
Methods:
Physiochemical properties, sub-cellular localization, domain composition, Nglycosylation
and Phosphorylation sites, and 3D structural models of the OsGLPs were predicted
using various bioinformatics tools. Functional analysis was carried out with the Search Tool for
the Retrieval of Interacting Genes/Proteins (STRING) and Blast2GO servers. The expression
profile of the OsGLPs was predicted by retrieving the data for expression values from tissuespecific
and hormonal stressed array libraries of RiceXPro. Their phylogenetic relationship was
computed using Molecular and Evolutionary Genetic Analysis (MEGA6) tool.
Results:
Most of the OsGLPs are stable in the cellular environment with a prominent expression in
the extracellular region (57%) and plasma membrane (33%). Besides, 3 basic cupin domains, 7
more were reported, among which NTTNKVGSNVTLINV, FLLAALLALASWQAI, and
MASSSF were common to 99% of the sequences, related to bacterial pathogenicity, peroxidase
activity, and peptide signal activity, respectively. Structurally, OsGLPs are similar but functionally
they are diverse with novel enzymatic activities of oxalate decarboxylase, lyase, peroxidase, and
oxidoreductase. Expression analysis revealed prominent activities in the root, endosperm, and
leaves. OsGLPs were strongly expressed by abscisic acid, auxin, gibberellin, cytokinin, and
brassinosteroid. Phylogenetically they showed polyphyletic origin with a narrow genetic
background of 0.05%. OsGLPs of chromosome 3, 8, and 12 are functionally more important due to
their defensive role against various stresses through co-expression strategy.
Conclusion:
The analysis will help to utilize OsGLPs in future food programs.
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Affiliation(s)
- Muhammad Ilyas
- Department of Botany, University of Swabi, Swabi-23561, Khyber Pakhtunkhwa, Pakistan
| | - Muhammad Irfan
- Department of Botany, University of Swabi, Swabi-23561, Khyber Pakhtunkhwa, Pakistan
| | - Tariq Mahmood
- Department of Botany, Faculty of Biological Sciences, Quaid-I-Azam University, Islamabad 45320, Pakistan
| | - Hazrat Hussain
- Department of Biotechnology, University of Swabi, Swabi-23561, Khyber Pakhtunkhwa, Pakistan
| | - Latif-ur-Rehman
- Department of Biotechnology, University of Swabi, Swabi-23561, Khyber Pakhtunkhwa, Pakistan
| | - Ijaz Naeem
- Department of Biotechnology, University of Swabi, Swabi-23561, Khyber Pakhtunkhwa, Pakistan
| | - Khaliq-ur-Rahman
- Department of Chemistry, University of Swabi, Swabi-23561, Khyber Pakhtunkhwa, Pakistan
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4
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Structural and enzymatic characterization of Peruvianin‑I, the first germin-like protein with proteolytic activity. Int J Biol Macromol 2019; 126:1167-1176. [DOI: 10.1016/j.ijbiomac.2019.01.023] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2018] [Revised: 01/04/2019] [Accepted: 01/05/2019] [Indexed: 11/21/2022]
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Jimenez-Lopez JC, Melser S, DeBoer K, Thatcher LF, Kamphuis LG, Foley RC, Singh KB. Narrow-Leafed Lupin ( Lupinus angustifolius) β1- and β6-Conglutin Proteins Exhibit Antifungal Activity, Protecting Plants against Necrotrophic Pathogen Induced Damage from Sclerotinia sclerotiorum and Phytophthora nicotianae. FRONTIERS IN PLANT SCIENCE 2016; 7:1856. [PMID: 28018392 PMCID: PMC5161055 DOI: 10.3389/fpls.2016.01856] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2016] [Accepted: 11/24/2016] [Indexed: 05/27/2023]
Abstract
Vicilins (7S globulins) are seed storage proteins and constitute the main protein family in legume seeds, particularly in narrow-leafed lupin (Lupinus angustifolius L.; NLL), where seven vicilin genes, called β1- to β7-conglutin have been identified. Vicilins are involved in germination processes supplying amino acids for seedling growth and plant development, as well as in some cases roles in plant defense and protection against pathogens. The roles of NLL β-conglutins in plant defense are unknown. Here the potential role of five NLL β-conglutin family members in protection against necrotrophic fungal pathogens was investigated and it was demonstrated that recombinant purified 6xHis-tagged β1- and β6-conglutin proteins exhibited the strongest in vitro growth inhibitory activity against a range of necrotrophic fungal pathogens compared to β2, β3, and β4 conglutins. To examine activity in vivo, two representative necrotrophic pathogens, the fungus Sclerotinia sclerotiorum and oomycete Phytophthora nicotianae were used. Transient expression of β1- and β6-conglutin proteins in Nicotiana benthamiana leaves demonstrated in vivo growth suppression of both of these pathogens, resulting in low percentages of hyphal growth and elongation in comparison to control treated leaves. Cellular studies using β1- and β6-GFP fusion proteins showed these conglutins localized to the cell surface including plasmodesmata. Analysis of cellular death following S. sclerotiorum or P. nicotianae revealed both β1- and β6-conglutins suppressed pathogen induced cell death in planta and prevented pathogen induced suppression of the plant oxidative burst as determined by protein oxidation in infected compared to mock-inoculated leaves.
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Affiliation(s)
- Jose C. Jimenez-Lopez
- The Institute of Agriculture, The University of Western Australia, PerthWA, Australia
- Department of Biochemistry, Cell and Molecular Biology of Plants, Estacion Experimental del Zaidin, Spanish National Research CouncilGranada, Spain
| | - Su Melser
- Centre for Environment and Life Sciences, Agriculture and Food, Commonwealth Scientific and Industrial Research Organisation, FloreatWA, Australia
| | - Kathleen DeBoer
- The Institute of Agriculture, The University of Western Australia, PerthWA, Australia
- Centre for Environment and Life Sciences, Agriculture and Food, Commonwealth Scientific and Industrial Research Organisation, FloreatWA, Australia
| | - Louise F. Thatcher
- Centre for Environment and Life Sciences, Agriculture and Food, Commonwealth Scientific and Industrial Research Organisation, FloreatWA, Australia
| | - Lars G. Kamphuis
- The Institute of Agriculture, The University of Western Australia, PerthWA, Australia
- Centre for Environment and Life Sciences, Agriculture and Food, Commonwealth Scientific and Industrial Research Organisation, FloreatWA, Australia
| | - Rhonda C. Foley
- Centre for Environment and Life Sciences, Agriculture and Food, Commonwealth Scientific and Industrial Research Organisation, FloreatWA, Australia
| | - Karam B. Singh
- The Institute of Agriculture, The University of Western Australia, PerthWA, Australia
- Centre for Environment and Life Sciences, Agriculture and Food, Commonwealth Scientific and Industrial Research Organisation, FloreatWA, Australia
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Yadav IS, Sharma A, Kaur S, Nahar N, Bhardwaj SC, Sharma TR, Chhuneja P. Comparative Temporal Transcriptome Profiling of Wheat near Isogenic Line Carrying Lr57 under Compatible and Incompatible Interactions. FRONTIERS IN PLANT SCIENCE 2016; 7:1943. [PMID: 28066494 PMCID: PMC5179980 DOI: 10.3389/fpls.2016.01943] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Accepted: 12/07/2016] [Indexed: 05/08/2023]
Abstract
Leaf rust caused by Puccinia triticina (Pt) is one of the most important diseases of bread wheat globally. Recent advances in sequencing technologies have provided opportunities to analyse the complete transcriptomes of the host as well as pathogen for studying differential gene expression during infection. Pathogen induced differential gene expression was characterized in a near isogenic line carrying leaf rust resistance gene Lr57 and susceptible recipient genotype WL711. RNA samples were collected at five different time points 0, 12, 24, 48, and 72 h post inoculation (HPI) with Pt 77-5. A total of 3020 transcripts were differentially expressed with 1458 and 2692 transcripts in WL711 and WL711+Lr57, respectively. The highest number of differentially expressed transcripts was detected at 12 HPI. Functional categorization using Blast2GO classified the genes into biological processes, molecular function and cellular components. WL711+Lr57 showed much higher number of differentially expressed nucleotide binding and leucine rich repeat genes and expressed more protein kinases and pathogenesis related proteins such as chitinases, glucanases and other PR proteins as compared to susceptible genotype. Pathway annotation with KEGG categorized genes into 13 major classes with carbohydrate metabolism being the most prominent followed by amino acid, secondary metabolites, and nucleotide metabolism. Gene co-expression network analysis identified four and eight clusters of highly correlated genes in WL711 and WL711+Lr57, respectively. Comparative analysis of the differentially expressed transcripts led to the identification of some transcripts which were specifically expressed only in WL711+Lr57. It was apparent from the whole transcriptome sequencing that the resistance gene Lr57 directed the expression of different genes involved in building the resistance response in the host to combat invading pathogen. The RNAseq data and differentially expressed transcripts identified in present study is a genomic resource which can be used for further studying the host pathogen interaction for Lr57 and wheat transcriptome in general.
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Affiliation(s)
- Inderjit S. Yadav
- School of Agricultural Biotechnology, Punjab Agricultural UniversityLudhiana, India
| | - Amandeep Sharma
- School of Agricultural Biotechnology, Punjab Agricultural UniversityLudhiana, India
| | - Satinder Kaur
- School of Agricultural Biotechnology, Punjab Agricultural UniversityLudhiana, India
| | - Natasha Nahar
- School of Agricultural Biotechnology, Punjab Agricultural UniversityLudhiana, India
| | - Subhash C. Bhardwaj
- Regional Research Station, Indian Institute of Wheat and Barley ResearchFlowerdale, Shimla
| | - Tilak R. Sharma
- National Research Centre on Plant BiotechnologyNew Delhi, India
| | - Parveen Chhuneja
- School of Agricultural Biotechnology, Punjab Agricultural UniversityLudhiana, India
- *Correspondence: Parveen Chhuneja
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7
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Beracochea VC, Almasia NI, Peluffo L, Nahirñak V, Hopp EH, Paniego N, Heinz RA, Vazquez-Rovere C, Lia VV. Sunflower germin-like protein HaGLP1 promotes ROS accumulation and enhances protection against fungal pathogens in transgenic Arabidopsis thaliana. PLANT CELL REPORTS 2015; 34:1717-33. [PMID: 26070410 DOI: 10.1007/s00299-015-1819-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2014] [Revised: 05/20/2015] [Accepted: 06/02/2015] [Indexed: 05/21/2023]
Abstract
The novel sunflower gene HaGLP1 is the first germin-like protein characterized from the family Asteraceae. It alters the host redox status and confers protection against Sclerotinia sclerotiorum and Rhizoctonia solani. Germin-like proteins (GLPs) are a large, diverse and ubiquitous family of plant glycoproteins belonging to the Cupin super family. These proteins have been widely studied because of their diverse roles in important plant processes, including defence. The novel sunflower gene HaGLP1 encodes the first germin-like protein characterized from the family Asteraceae. To analyse whether constitutive in vivo expression of the HaGLP1 gene may lead to disease tolerance, we developed transgenic Arabidopsis plants that were molecularly characterized and biologically assessed after inoculation with Sclerotinia sclerotiorum or Rhizoctonia solani. HaGLP1 expression in Arabidopsis plants conferred tolerance to S. sclerotiorum at the first stages of disease and interfered with R. solani infection, thus giving rise to significant protection against the latter. Furthermore, HaGLP1 expression in Arabidopsis plants elevated endogenous ROS levels. HaGLP1-induced tolerance does not appear to be related to a constitutive induction of the plant defence or the ROS-related genes examined here. In conclusion, our data suggest that HaGLP1 is an interesting candidate for the engineering of plants with increased fungal tolerance and that this gene could also be useful for the selection of naturally overexpressing sunflower genotypes for conventional breeding purposes.
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Affiliation(s)
- V C Beracochea
- Instituto de Biotecnología, CICVyA, Instituto Nacional de Tecnología Agropecuaria (INTA)-Castelar, Dr. Nicolás Repetto y De Los Reseros S/Nº (B1686IGC) Hurlingham, Buenos Aires, Provincia De Buenos Aires, Argentina
| | - N I Almasia
- Instituto de Biotecnología, CICVyA, Instituto Nacional de Tecnología Agropecuaria (INTA)-Castelar, Dr. Nicolás Repetto y De Los Reseros S/Nº (B1686IGC) Hurlingham, Buenos Aires, Provincia De Buenos Aires, Argentina
| | - L Peluffo
- Instituto de Biotecnología, CICVyA, Instituto Nacional de Tecnología Agropecuaria (INTA)-Castelar, Dr. Nicolás Repetto y De Los Reseros S/Nº (B1686IGC) Hurlingham, Buenos Aires, Provincia De Buenos Aires, Argentina
| | - V Nahirñak
- Instituto de Biotecnología, CICVyA, Instituto Nacional de Tecnología Agropecuaria (INTA)-Castelar, Dr. Nicolás Repetto y De Los Reseros S/Nº (B1686IGC) Hurlingham, Buenos Aires, Provincia De Buenos Aires, Argentina
| | - E H Hopp
- Instituto de Biotecnología, CICVyA, Instituto Nacional de Tecnología Agropecuaria (INTA)-Castelar, Dr. Nicolás Repetto y De Los Reseros S/Nº (B1686IGC) Hurlingham, Buenos Aires, Provincia De Buenos Aires, Argentina
- Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, (EHA1428), Buenos Aires, Argentina
| | - N Paniego
- Instituto de Biotecnología, CICVyA, Instituto Nacional de Tecnología Agropecuaria (INTA)-Castelar, Dr. Nicolás Repetto y De Los Reseros S/Nº (B1686IGC) Hurlingham, Buenos Aires, Provincia De Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Av. Rivadavia 1917 (C1033AAJ), Ciudad Autónoma De Buenos Aires, Buenos Aires, Argentina
| | - R A Heinz
- Instituto de Biotecnología, CICVyA, Instituto Nacional de Tecnología Agropecuaria (INTA)-Castelar, Dr. Nicolás Repetto y De Los Reseros S/Nº (B1686IGC) Hurlingham, Buenos Aires, Provincia De Buenos Aires, Argentina
- Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, (EHA1428), Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Av. Rivadavia 1917 (C1033AAJ), Ciudad Autónoma De Buenos Aires, Buenos Aires, Argentina
| | - C Vazquez-Rovere
- Instituto de Biotecnología, CICVyA, Instituto Nacional de Tecnología Agropecuaria (INTA)-Castelar, Dr. Nicolás Repetto y De Los Reseros S/Nº (B1686IGC) Hurlingham, Buenos Aires, Provincia De Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Av. Rivadavia 1917 (C1033AAJ), Ciudad Autónoma De Buenos Aires, Buenos Aires, Argentina
| | - V V Lia
- Instituto de Biotecnología, CICVyA, Instituto Nacional de Tecnología Agropecuaria (INTA)-Castelar, Dr. Nicolás Repetto y De Los Reseros S/Nº (B1686IGC) Hurlingham, Buenos Aires, Provincia De Buenos Aires, Argentina.
- Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, (EHA1428), Buenos Aires, Argentina.
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Av. Rivadavia 1917 (C1033AAJ), Ciudad Autónoma De Buenos Aires, Buenos Aires, Argentina.
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8
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Heard S, Brown NA, Hammond-Kosack K. An Interspecies Comparative Analysis of the Predicted Secretomes of the Necrotrophic Plant Pathogens Sclerotinia sclerotiorum and Botrytis cinerea. PLoS One 2015; 10:e0130534. [PMID: 26107498 PMCID: PMC4480369 DOI: 10.1371/journal.pone.0130534] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2015] [Accepted: 05/22/2015] [Indexed: 11/25/2022] Open
Abstract
Phytopathogenic fungi form intimate associations with host plant species and cause disease. To be successful, fungal pathogens communicate with a susceptible host through the secretion of proteinaceous effectors, hydrolytic enzymes and metabolites. Sclerotinia sclerotiorum and Botrytis cinerea are economically important necrotrophic fungal pathogens that cause disease on numerous crop species. Here, a powerful bioinformatics pipeline was used to predict the refined S. sclerotiorum and B. cinerea secretomes, identifying 432 and 499 proteins respectively. Analyses focusing on S. sclerotiorum revealed that 16% of the secretome encoding genes resided in small, sequence heterogeneous, gene clusters that were distributed over 13 of the 16 predicted chromosomes. Functional analyses highlighted the importance of plant cell hydrolysis, oxidation-reduction processes and the redox state to the S. sclerotiorum and B. cinerea secretomes and potentially host infection. Only 8% of the predicted proteins were distinct between the two secretomes. In contrast to S. sclerotiorum, the B. cinerea secretome lacked CFEM- or LysM-containing proteins. The 115 fungal and oomycete genome comparison identified 30 proteins specific to S. sclerotiorum and B. cinerea, plus 11 proteins specific to S. sclerotiorum and 32 proteins specific to B. cinerea. Expressed sequence tag (EST) and proteomic analyses showed that 246 S. sclerotiorum secretome encoding genes had EST support, including 101 which were only expressed in vitro and 49 which were only expressed in planta, whilst 42 predicted proteins were experimentally proven to be secreted. These detailed in silico analyses of two important necrotrophic pathogens will permit informed choices to be made when candidate effector proteins are selected for function analyses in planta.
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Affiliation(s)
- Steph Heard
- Plant Biology and Crop Science, Rothamsted Research, West Common, Harpenden, Hertfordshire, United Kingdom
| | - Neil A. Brown
- Plant Biology and Crop Science, Rothamsted Research, West Common, Harpenden, Hertfordshire, United Kingdom
| | - Kim Hammond-Kosack
- Plant Biology and Crop Science, Rothamsted Research, West Common, Harpenden, Hertfordshire, United Kingdom
- * E-mail:
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9
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Moomaw EW, Uberto R, Tu C. Membrane inlet mass spectrometry reveals that Ceriporiopsis subvermispora bicupin oxalate oxidase is inhibited by nitric oxide. Biochem Biophys Res Commun 2014; 450:750-4. [PMID: 24953692 DOI: 10.1016/j.bbrc.2014.06.040] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2014] [Accepted: 06/10/2014] [Indexed: 10/25/2022]
Abstract
Membrane inlet mass spectrometry (MIMS) uses a semipermeable membrane as an inlet to a mass spectrometer for the measurement of the concentration of small uncharged molecules in solution. We report the use of MIMS to characterize the catalytic properties of oxalate oxidase (E.C. 1.2.3.4) from Ceriporiopsis subvermispora (CsOxOx). Oxalate oxidase is a manganese dependent enzyme that catalyzes the oxygen-dependent oxidation of oxalate to carbon dioxide in a reaction that is coupled with the formation of hydrogen peroxide. CsOxOx is the first bicupin enzyme identified that catalyzes this reaction. The MIMS method of measuring OxOx activity involves continuous, real-time direct detection of oxygen consumption and carbon dioxide production from the ion currents of their respective mass peaks. (13)C2-oxalate was used to allow for accurate detection of (13)CO2 (m/z 45) despite the presence of adventitious (12)CO2. Steady-state kinetic constants determined by MIMS are comparable to those obtained by a continuous spectrophotometric assay in which H2O2 production is coupled to the horseradish peroxidase catalyzed oxidation of 2,2'-azinobis-(3-ethylbenzthiazoline-6-sulphonic acid). Furthermore, we used MIMS to determine that NO inhibits the activity of the CsOxOx with a KI of 0.58±0.06 μM.
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Affiliation(s)
- Ellen W Moomaw
- Department of Chemistry and Biochemistry, Kennesaw State University, Kennesaw, GA 30144, USA.
| | - Richard Uberto
- Department of Chemistry and Biochemistry, Kennesaw State University, Kennesaw, GA 30144, USA
| | - Chingkuang Tu
- Department of Pharmacology and Therapeutics, University of Florida, Gainesville, FL 32610, USA
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10
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Li Y, Zhang L, Ding Z, Shi G. Constitutive expression of a novel isoamylase from Bacillus lentus in Pichia pastoris for starch processing. Process Biochem 2013. [DOI: 10.1016/j.procbio.2013.07.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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11
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Patnaik BB, Kim DH, Oh SH, Song YS, Chanh NDM, Kim JS, Jung WJ, Saha AK, Bindroo BB, Han YS. Molecular cloning and characterization of novel Morus alba germin-like protein gene which encodes for a silkworm gut digestion-resistant antimicrobial protein. PLoS One 2012; 7:e50900. [PMID: 23284650 PMCID: PMC3526618 DOI: 10.1371/journal.pone.0050900] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2012] [Accepted: 10/26/2012] [Indexed: 11/19/2022] Open
Abstract
Background Silkworm fecal matter is considered one of the richest sources of antimicrobial and antiviral protein (substances) and such economically feasible and eco-friendly proteins acting as secondary metabolites from the insect system can be explored for their practical utility in conferring broad spectrum disease resistance against pathogenic microbial specimens. Methodology/Principal Findings Silkworm fecal matter extracts prepared in 0.02 M phosphate buffer saline (pH 7.4), at a temperature of 60°C was subjected to 40% saturated ammonium sulphate precipitation and purified by gel-filtration chromatography (GFC). SDS-PAGE under denaturing conditions showed a single band at about 21.5 kDa. The peak fraction, thus obtained by GFC wastested for homogeneityusing C18reverse-phase high performance liquid chromatography (HPLC). The activity of the purified protein was tested against selected Gram +/− bacteria and phytopathogenic Fusarium species with concentration-dependent inhibitionrelationship. The purified bioactive protein was subjected to matrix-assisted laser desorption and ionization-time of flight mass spectrometry (MALDI-TOF-MS) and N-terminal sequencing by Edman degradation towards its identification. The N-terminal first 18 amino acid sequence following the predicted signal peptide showed homology to plant germin-like proteins (Glp). In order to characterize the full-length gene sequence in detail, the partial cDNA was cloned and sequenced using degenerate primers, followed by 5′- and 3′-rapid amplification of cDNA ends (RACE-PCR). The full-length cDNA sequence composed of 630 bp encoding 209 amino acids and corresponded to germin-like proteins (Glps) involved in plant development and defense. Conclusions/Significance The study reports, characterization of novel Glpbelonging to subfamily 3 from M. alba by the purification of mature active protein from silkworm fecal matter. The N-terminal amino acid sequence of the purified protein was found similar to the deduced amino acid sequence (without the transit peptide sequence) of the full length cDNA from M. alba.
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Affiliation(s)
- Bharat Bhusan Patnaik
- Division of Plant Biotechnology, College of Agriculture and Life Sciences, Chonnam National University, Gwangju, South Korea
- * E-mail: (BBP); (YSH)
| | - Dong Hyun Kim
- Division of Plant Biotechnology, College of Agriculture and Life Sciences, Chonnam National University, Gwangju, South Korea
| | - Seung Han Oh
- Division of Plant Biotechnology, College of Agriculture and Life Sciences, Chonnam National University, Gwangju, South Korea
| | - Yong-Su Song
- Division of Applied Bioscience and Biotechnology, Institute of Environmentally-Friendly Agriculture, Chonnam National University, Gwangju, Republic of Korea
| | - Nguyen Dang Minh Chanh
- Division of Applied Bioscience and Biotechnology, Institute of Environmentally-Friendly Agriculture, Chonnam National University, Gwangju, Republic of Korea
| | - Jong Sun Kim
- Institute of Insect and Sericultural Research, Jeonnam Agricultural Research and Extension Service, Jangseong, Republic of Korea
| | - Woo-jin Jung
- Division of Applied Bioscience and Biotechnology, Institute of Environmentally-Friendly Agriculture, Chonnam National University, Gwangju, Republic of Korea
| | - Atul Kumar Saha
- Central Sericultural Research and Training Institute, Central Silk Board (Govt. of India), Berhampore, West Bengal, India
| | - Bharat Bhushan Bindroo
- Central Sericultural Research and Training Institute, Central Silk Board (Govt. of India), Berhampore, West Bengal, India
| | - Yeon Soo Han
- Division of Plant Biotechnology, College of Agriculture and Life Sciences, Chonnam National University, Gwangju, South Korea
- * E-mail: (BBP); (YSH)
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Durand TC, Sergeant K, Carpin S, Label P, Morabito D, Hausman JF, Renaut J. Screening for changes in leaf and cambial proteome of Populus tremula × P. alba under different heat constraints. JOURNAL OF PLANT PHYSIOLOGY 2012; 169:1698-718. [PMID: 22883629 DOI: 10.1016/j.jplph.2012.06.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2012] [Accepted: 06/29/2012] [Indexed: 05/13/2023]
Abstract
Young poplar plants were exposed to different heat regimes, a rapid heat constraint at 42°C (heat shock HS) alone or preceded by a stepwise increase in temperature (heat gradient HG). Proteomics analyses were carried out on both leaf and cambial tissues. The responses of both tissues were compared and linked to morphological and physiological observations. Both heat treatments negatively affected the photosynthetic rate while increasing the stomatal conductance. In the leaf, the HS impacted some photosynthetic proteins, and particularly induced an increase in abundance of proteins of the oxygen evolving complexes. On the other hand, the HG reduced carbohydrate metabolism and induced mainly an increase in germin-like proteins. In the cambial zone, the HS caused a decrease in sucrose synthase content and in enzymes related to protein synthesis. The main effect of HG was the accumulation of thaumatin-like proteins as well as an increase in the abundance of proteins involved in carbohydrate metabolism. Further, both tissues underwent changes in the content of heat shock proteins, but more importantly, of peroxiredoxins. The results show more sustainable changes in leaf and cambial proteomes in response to HS compared to HG.
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Affiliation(s)
- Thomas C Durand
- CRP-Gabriel Lippmann, Department Environment and Agro-biotechnologies, Luxembourg, France
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13
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A germin-like protein gene (CchGLP) of Capsicum chinense Jacq. is induced during incompatible interactions and displays Mn-superoxide dismutase activity. Int J Mol Sci 2011; 12:7301-13. [PMID: 22174599 PMCID: PMC3233405 DOI: 10.3390/ijms12117301] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2011] [Revised: 09/04/2011] [Accepted: 10/17/2011] [Indexed: 11/16/2022] Open
Abstract
A germin-like gene (CchGLP) cloned from geminivirus-resistant pepper (Capsicum chinense Jacq. Line BG-3821) was characterized and the enzymatic activity of the expressed protein analyzed. The predicted protein consists of 203 amino acids, similar to other germin-like proteins. A highly conserved cupin domain and typical germin boxes, one of them containing three histidines and one glutamate, are also present in CchGLP. A signal peptide was predicted in the first 18 N-terminal amino acids, as well as one putative N-glycosylation site from residues 44-47. CchGLP was expressed in E. coli and the recombinant protein displayed manganese superoxide dismutase (Mn-SOD) activity. Molecular analysis showed that CchGLP is present in one copy in the C. chinense Jacq. genome and was induced in plants by ethylene (Et) and salicylic acid (SA) but not jasmonic acid (JA) applications in the absence of pathogens. Meanwhile, incompatible interactions with either Pepper golden mosaic virus (PepGMV) or Pepper huasteco yellow vein virus (PHYVV) caused local and systemic CchGLP induction in these geminivirus-resistant plants, but not in a susceptible accession. Compatible interactions with PHYVV, PepGMV and oomycete Phytophthora capsici did not induce CchGLP expression. Thus, these results indicate that CchGLP encodes a Mn-SOD, which is induced in the C. chinense geminivirus-resistant line BG-3821, likely using SA and Et signaling pathways during incompatible interactions with geminiviruses PepGMV and PHYVV.
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Zhu L, Wang J, Mu J, Wang H, Zhang C, Wang J, Liu X, Yan X, Dai L, Ma D. Expression and characterization of Kunitz domain 3 and C-terminal of human tissue factor pathway inhibitor-2. Acta Biochim Biophys Sin (Shanghai) 2009; 41:948-54. [PMID: 19902129 DOI: 10.1093/abbs/gmp089] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Human tissue factor pathway inhibitor-2 (hTFPI-2) is a serine protease inhibitor and its inhibitory activity is enhanced by heparin. The Kunitz domain 3 and Cterminal of hTFPI-2 (hTFPI-2/KD3C), which has the activity toward heparin calcium, have been successfully expressed in Pichia pastoris and purified by SPSepharose and heparin-Sepharose chromatography. The Fourier transformed infrared spectroscopy (FTIR), Raman spectroscopy, and circular dichroism (CD) experiment results implied that hTFPI-2/KD3C contained small contents of alpha-helix and beta-strand, but large amounts of random coil and two kinds of disulfide bonds, gauche-gauche-gauche (ggg) and trans-gauchetrans (tgt). The interaction of hTFPI-2/KD3C with heparin calcium was investigated by CD. It was found that heparin calcium induced b-strands in hTFPI-2/ KD3C to different extents depending on the ratio of hTFPI-2/KD3C and heparin calcium.
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Affiliation(s)
- Lina Zhu
- Center of Analysis and Measurement, Fudan University, Shanghai 200433, China
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15
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Micheelsen PO, Ostergaard PR, Lange L, Skjøt M. High-level expression of the native barley alpha-amylase/subtilisin inhibitor in Pichia pastoris. J Biotechnol 2007; 133:424-32. [PMID: 18207271 DOI: 10.1016/j.jbiotec.2007.11.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2007] [Revised: 10/15/2007] [Accepted: 11/28/2007] [Indexed: 11/16/2022]
Abstract
An expression system for high-level expression of the native Hordeum vulgare alpha-amylase/subtilisin inhibitor (BASI) has been developed in Pichia pastoris, using the methanol inducible alcohol oxidase 1 (AOX1) promoter. To optimize expression, two codon-optimized coding regions have been designed and expressed alongside the wild-type coding region. To ensure secretion of the native mature protein, a truncated version of the alpha mating factor secretion signal from Saccharomyces cerevisiae was used. In order to be able to compare expression levels from different clones, single insertion transformants generated by gene replacement of the AOX1 gene was selected by PCR screening. Following methanol induction, expression levels reached 125 mgL(-1) from the wild-type coding region while expression from the two codon-optimized variants reached 65 and 125 mgL(-1), respectively. The protein was purified and characterized by Edman degradation, liquid chromatography mass spectrometry and insoluble blue starch assay, and was shown to possess the same characteristics as wild-type protein purified from barley grains.
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Affiliation(s)
- Pernille Ollendorff Micheelsen
- Copenhagen Biocenter, Department of Molecular Biology, University of Copenhagen, Ole Maaløes Vej 5, 2200 Copenhagen N, Denmark.
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