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Abstract
Dozens of studies have assessed the practical value of plant cystatins as ectopic inhibitors of Cys proteases in biological systems. The potential of these proteins in crop protection to control herbivorous pests and pathogens has been documented extensively over the past 25 years. Their usefulness to regulate endogenous Cys proteases in planta has also been considered recently, notably to implement novel traits of agronomic relevance in crops or to generate protease activity-depleted environments in plants or plant cells used as bioreactors for recombinant proteins. After a brief update on the basic structural characteristics of plant cystatins, we summarize recent advances on the use of these proteins in plant biotechnology. Attention is also paid to the molecular improvement of their structural properties for the improvement of their protease inhibitory effects or the fine-tuning of their biological target range.
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Rasoolizadeh A, Munger A, Goulet MC, Sainsbury F, Cloutier C, Michaud D. Functional proteomics-aided selection of protease inhibitors for herbivore insect control. Sci Rep 2016; 6:38827. [PMID: 27958307 PMCID: PMC5153846 DOI: 10.1038/srep38827] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2016] [Accepted: 11/15/2016] [Indexed: 11/09/2022] Open
Abstract
Studies have reported the potential of protease inhibitors to engineer insect resistance in transgenic plants but the general usefulness of this approach in crop protection still remains to be established. Insects have evolved strategies to cope with dietary protease inhibitors, such as the use of proteases recalcitrant to inhibition, that often make the selection of effective inhibitors very challenging. Here, we used a functional proteomics approach for the ‘capture’ of Cys protease targets in crude protein extracts as a tool to identify promising cystatins for plant improvement. Two cystatins found to differ in their efficiency to capture Cys proteases of the coleopteran pest Leptinotarsa decemlineata also differed in their usefulness to produce transgenic potato lines resistant to this insect. Plants expressing the most potent cystatin at high level had a strong repressing effect on larval growth and leaf intake, while plants expressing the weakest cystatin showed no effect on both two parameters compared to untransformed parental line used for genetic transformation. Our data underline the relevance of considering the whole range of possible protease targets when selecting an inhibitor for plant pest control. They also confirm the feasibility of developing cystatin-expressing transgenics resistant to a major pest of potato.
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Affiliation(s)
| | - Aurélie Munger
- Département de phytologie, Université Laval, Québec City, QC, Canada
| | | | - Frank Sainsbury
- Département de phytologie, Université Laval, Québec City, QC, Canada
| | - Conrad Cloutier
- Département de biologie, Université Laval, Québec City QC, Canada
| | - Dominique Michaud
- Département de phytologie, Université Laval, Québec City, QC, Canada
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Robert S, Jutras PV, Khalf M, D'Aoust MA, Goulet MC, Sainsbury F, Michaud D. Companion Protease Inhibitors for the In Situ Protection of Recombinant Proteins in Plants. Methods Mol Biol 2016; 1385:115-26. [PMID: 26614285 DOI: 10.1007/978-1-4939-3289-4_8] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
We previously described a procedure for the use of plant protease inhibitors as "companion" accessory proteins to prevent unwanted proteolysis of clinically useful recombinant proteins in leaf crude protein extracts (Benchabane et al. Methods Mol Biol 483:265-273, 2009). Here we describe the use of these inhibitors for the protection of recombinant proteins in planta, before their extraction from leaf tissues. A procedure is first described involving inhibitors co-expressed along-and co-migrating-with the protein of interest in host plant cells. An alternative, single transgene scheme is then described involving translational fusions of the recombinant protein and companion inhibitor. These approaches may allow for a significant improvement of protein steady-state levels in leaves, comparable to yield improvements observed with protease-deficient strains of less complex protein expression hosts such as E. coli or yeasts.
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Affiliation(s)
- Stéphanie Robert
- Centre de Recherche et d'Innovation sur les Végétaux, Université Laval, Québec, QC, Canada
| | - Philippe V Jutras
- Centre de Recherche et d'Innovation sur les Végétaux, Université Laval, Québec, QC, Canada
| | - Moustafa Khalf
- Centre de Recherche et d'Innovation sur les Végétaux, Université Laval, Québec, QC, Canada
| | | | - Marie-Claire Goulet
- Centre de Recherche et d'Innovation sur les Végétaux, Université Laval, Québec, QC, Canada
| | - Frank Sainsbury
- Centre de Recherche et d'Innovation sur les Végétaux, Université Laval, Québec, QC, Canada
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia, QLD, Australia
| | - Dominique Michaud
- Centre de Recherche et d'Innovation sur les Végétaux, Université Laval, Québec, QC, Canada.
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Munger A, Simon MA, Khalf M, Goulet MC, Michaud D. Cereal cystatins delay sprouting and nutrient loss in tubers of potato, Solanum tuberosum. BMC PLANT BIOLOGY 2015; 15:296. [PMID: 26691165 PMCID: PMC4687224 DOI: 10.1186/s12870-015-0683-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Accepted: 12/13/2015] [Indexed: 05/24/2023]
Abstract
BACKGROUND Recent studies have reported agronomically useful ectopic effects for recombinant protease inhibitors expressed in leaves of transgenic plants, including improved tolerance to abiotic stress conditions and partial resistance to necrotrophic pathogens. Here we assessed the effects of these proteins on the post-dormancy sprouting of storage organs, using as a model potato tubers expressing cysteine protease inhibitors of the cystatin protein superfamily. RESULTS Sprout emergence and distribution, soluble proteins, starch and soluble sugars were monitored in tubers of cereal cystatin-expressing clones stored for several months at 4 °C. Cystatin expression had a strong repressing effect on sprout growth, associated with an apparent loss of apical dominance and an increased number of small buds at the skin surface. Soluble protein content remained high for up to 48 weeks in cystatin-expressing tubers compared to control (untransformed) tubers, likely explained by a significant stabilization of the major storage protein patatin, decreased hydrolysis of the endogenous protease inhibitor multicystatin and low cystatin-sensitive cysteine protease activity in tuber tissue. Starch content decreased after several months in cystatin-expressing tubers but remained higher than in control tubers, unlike sucrose showing a slower accumulation in the transgenics. Plantlet emergence, storage protein processing and height of growing plants showed similar time-course patterns for control and transgenic tubers, except for a systematic delay of 2 or 3 d in the latter group likely due to limited sprout size at sowing. CONCLUSIONS Our data point overall to the onset of metabolic interference effects for cereal cystatins in sprouting potato tubers. They suggest, in practice, the potential of endogenous cysteine proteases as relevant targets for the development of potato varieties with longer storage capabilities.
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Affiliation(s)
- Aurélie Munger
- Centre de recherche et d'innovation sur les végétaux|Biotechnologie Université Laval, Québec, QC, G1V 0A6, Canada.
| | - Marie-Aube Simon
- Centre de recherche et d'innovation sur les végétaux|Biotechnologie Université Laval, Québec, QC, G1V 0A6, Canada.
- Present address: Services aux entreprises et formation continue, Cégep de St-Jérôme, St-Jérôme, J7Z 4 V2, QC, Canada.
| | - Moustafa Khalf
- Centre de recherche et d'innovation sur les végétaux|Biotechnologie Université Laval, Québec, QC, G1V 0A6, Canada.
| | - Marie-Claire Goulet
- Centre de recherche et d'innovation sur les végétaux|Biotechnologie Université Laval, Québec, QC, G1V 0A6, Canada.
| | - Dominique Michaud
- Centre de recherche et d'innovation sur les végétaux|Biotechnologie Université Laval, Québec, QC, G1V 0A6, Canada.
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Poboży E, Filaber M, Koc A, Garcia-Reyes JF. Application of capillary electrophoretic chips in protein profiling of plant extracts for identification of genetic modifications of maize. Electrophoresis 2013; 34:2740-53. [DOI: 10.1002/elps.201300103] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2013] [Revised: 06/05/2013] [Accepted: 06/10/2013] [Indexed: 12/15/2022]
Affiliation(s)
- Ewa Poboży
- Department of Chemistry; University of Warsaw; Warsaw; Poland
| | - Monika Filaber
- Department of Chemistry; University of Warsaw; Warsaw; Poland
| | - Anna Koc
- Department of Chemistry; University of Warsaw; Warsaw; Poland
| | - Juan F. Garcia-Reyes
- Analytical Chemistry Research Group, Department of Physical and Analytical Chemistry; University of Jaén; Jaén; Spain
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Production of pharmaceutical proteins in solanaceae food crops. Int J Mol Sci 2013; 14:2753-73. [PMID: 23434646 PMCID: PMC3588013 DOI: 10.3390/ijms14022753] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2012] [Revised: 01/11/2013] [Accepted: 01/22/2013] [Indexed: 12/13/2022] Open
Abstract
The benefits of increased safety and cost-effectiveness make vegetable crops appropriate systems for the production and delivery of pharmaceutical proteins. In particular, Solanaceae edible crops could be inexpensive biofactories for oral vaccines and other pharmaceutical proteins that can be ingested as minimally processed extracts or as partially purified products. The field of crop plant biotechnology is advancing rapidly due to novel developments in genetic and genomic tools being made available today for the scientific community. In this review, we briefly summarize data now available regarding genomic resources for the Solanaceae family. In addition, we describe novel strategies developed for the expression of foreign proteins in vegetable crops and the utilization of these techniques to manufacture pharmaceutical proteins.
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Munger A, Coenen K, Cantin L, Goulet C, Vaillancourt LP, Goulet MC, Tweddell R, Sainsbury F, Michaud D. Beneficial 'unintended effects' of a cereal cystatin in transgenic lines of potato, Solanum tuberosum. BMC PLANT BIOLOGY 2012; 12:198. [PMID: 23116303 PMCID: PMC3534561 DOI: 10.1186/1471-2229-12-198] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2012] [Accepted: 10/29/2012] [Indexed: 05/08/2023]
Abstract
BACKGROUND Studies reported unintended pleiotropic effects for a number of pesticidal proteins ectopically expressed in transgenic crops, but the nature and significance of such effects in planta remain poorly understood. Here we assessed the effects of corn cystatin II (CCII), a potent inhibitor of C1A cysteine (Cys) proteases considered for insect and pathogen control, on the leaf proteome and pathogen resistance status of potato lines constitutively expressing this protein. RESULTS The leaf proteome of lines accumulating CCII at different levels was resolved by 2-dimensional gel electrophoresis and compared with the leaf proteome of a control (parental) line. Out of ca. 700 proteins monitored on 2-D gels, 23 were significantly up- or downregulated in CCII-expressing leaves, including 14 proteins detected de novo or up-regulated by more than five-fold compared to the control. Most up-regulated proteins were abiotic or biotic stress-responsive proteins, including different secretory peroxidases, wound inducible protease inhibitors and pathogenesis-related proteins. Accordingly, infection of leaf tissues by the fungal necrotroph Botryris cinerea was prevented in CCII-expressing plants, despite a null impact of CCII on growth of this pathogen and the absence of extracellular Cys protease targets for the inhibitor. CONCLUSIONS These data point to the onset of pleiotropic effects altering the leaf proteome in transgenic plants expressing recombinant protease inhibitors. They also show the potential of these proteins as ectopic modulators of stress responses in planta, useful to engineer biotic or abiotic stress tolerance in crop plants of economic significance.
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Affiliation(s)
- Aurélie Munger
- Centre de recherche en horticulture, Département de phytologie, Université Laval, Pavillon des Services, 2440 boul. Hochelaga, Québec, QC,, G1V 0A6, Canada
| | - Karine Coenen
- Centre de recherche en horticulture, Département de phytologie, Université Laval, Pavillon des Services, 2440 boul. Hochelaga, Québec, QC,, G1V 0A6, Canada
| | - Line Cantin
- Centre de recherche en horticulture, Département de phytologie, Université Laval, Pavillon des Services, 2440 boul. Hochelaga, Québec, QC,, G1V 0A6, Canada
| | - Charles Goulet
- Centre de recherche en horticulture, Département de phytologie, Université Laval, Pavillon des Services, 2440 boul. Hochelaga, Québec, QC,, G1V 0A6, Canada
- Current address: Horticulture Sciences Department, University of Florida, Gainesville, FL, 32611, USA
| | - Louis-Philippe Vaillancourt
- Centre de recherche en horticulture, Département de phytologie, Université Laval, Pavillon des Services, 2440 boul. Hochelaga, Québec, QC,, G1V 0A6, Canada
| | - Marie-Claire Goulet
- Centre de recherche en horticulture, Département de phytologie, Université Laval, Pavillon des Services, 2440 boul. Hochelaga, Québec, QC,, G1V 0A6, Canada
| | - Russell Tweddell
- Centre de recherche en horticulture, Département de phytologie, Université Laval, Pavillon des Services, 2440 boul. Hochelaga, Québec, QC,, G1V 0A6, Canada
| | - Frank Sainsbury
- Centre de recherche en horticulture, Département de phytologie, Université Laval, Pavillon des Services, 2440 boul. Hochelaga, Québec, QC,, G1V 0A6, Canada
| | - Dominique Michaud
- Centre de recherche en horticulture, Département de phytologie, Université Laval, Pavillon des Services, 2440 boul. Hochelaga, Québec, QC,, G1V 0A6, Canada
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Koc A, Cañuelo A, Garcia-Reyes JF, Molina-Diaz A, Trojanowicz M. Low-molecular weight protein profiling of genetically modified maize using fast liquid chromatography electrospray ionization and time-of-flight mass spectrometry. J Sep Sci 2012; 35:1447-61. [DOI: 10.1002/jssc.201200109] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Anna Koc
- Department of Chemistry; University of Warsaw; Warsaw Poland
| | - Ana Cañuelo
- Department of Experimental Biology; University of Jaén; Jaén Spain
| | - Juan F. Garcia-Reyes
- Analytical Chemistry Research Group, Department of Physical and Analytical Chemistry; University of Jaén; Jaén Spain
| | - Antonio Molina-Diaz
- Analytical Chemistry Research Group, Department of Physical and Analytical Chemistry; University of Jaén; Jaén Spain
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Yoshimatsu K, Kawano N, Kawahara N, Akiyama H, Teshima R, Nishijima M. [Current status in the commercialization and application of genetically modified plants and their effects on human and livestock health and phytoremediation]. YAKUGAKU ZASSHI 2012; 132:629-74. [PMID: 22687699 DOI: 10.1248/yakushi.132.629] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Developments in the use of genetically modified plants for human and livestock health and phytoremediation were surveyed using information retrieved from Entrez PubMed, Chemical Abstracts Service, Google, congress abstracts and proceedings of related scientific societies, scientific journals, etc. Information obtained was classified into 8 categories according to the research objective and the usage of the transgenic plants as 1: nutraceuticals (functional foods), 2: oral vaccines, 3: edible curatives, 4: vaccine antigens, 5: therapeutic antibodies, 6: curatives, 7: diagnostic agents and reagents, and 8: phytoremediation. In total, 405 cases were collected from 2006 to 2010. The numbers of cases were 120 for nutraceuticals, 65 for oral vaccines, 25 for edible curatives, 36 for vaccine antigens, 36 for therapeutic antibodies, 76 for curatives, 15 for diagnostic agents and reagents, and 40 for phytoremediation (sum of each cases was 413 because some reports were related to several categories). Nutraceuticals, oral vaccines and curatives were predominant. The most frequently used edible crop was rice (51 cases), and tomato (28 cases), lettuce (22 cases), potato (18 cases), corn (15 cases) followed.
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Affiliation(s)
- Kayo Yoshimatsu
- Research Center for Medicinal Plant Resources, National Institute of Biomedical Innovation, Ibaraki, Japan.
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Goulet C, Khalf M, Sainsbury F, D'Aoust MA, Michaud D. A protease activity-depleted environment for heterologous proteins migrating towards the leaf cell apoplast. PLANT BIOTECHNOLOGY JOURNAL 2012; 10:83-94. [PMID: 21895943 DOI: 10.1111/j.1467-7652.2011.00643.x] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Recombinant proteins face major constraints along the plant cell secretory pathway, including proteolytic processing compromising their structural integrity. Here, we demonstrate the potential of protease inhibitors as in situ stabilizing agents for recombinant proteins migrating towards the leaf apoplast. Genomic data for Arabidopsis, rice and Nicotiana spp. were assessed to determine the relative incidence of protease families in the cell secretory pathway. Transient expression assays with the model platform Nicotiana benthamiana were then performed to test the efficiency of protease inhibitors in stabilizing proteins targeted to the apoplast. Current genomic data suggest the occurrence of proteases from several families along the secretory pathway, including A1 and A22 Asp proteases; C1A and C13 Cys proteases; and S1, S8 and S10 Ser proteases. In vitro protease assays confirmed the presence of various proteases in N. benthamiana leaves, notably pointing to the deposition of A1- and S1-type activities preferentially in the apoplast. Accordingly, transient expression and secretion of the A1/S1 protease inhibitor, tomato cathepsin D inhibitor (SlCDI), negatively altered A1 and S1 protease activities in this cell compartment, while increasing the leaf apoplast protein content by ∼45% and improving the accumulation of a murine diagnostic antibody, C5-1, co-secreted in the apoplast. SlCYS9, an inhibitor of C1A and C13 Cys proteases, had no impact on the apoplast proteases and protein content, but stabilized C5-1 in planta, presumably upstream in the secretory pathway. These data confirm, overall, the potential of protease inhibitors for the in situ protection of recombinant proteins along the plant cell secretory pathway.
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Affiliation(s)
- Charles Goulet
- Département de phytologie, Université Laval, Pavillon des Services (INAF), Québec, QC, Canada
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Urbany C, Colby T, Stich B, Schmidt L, Schmidt J, Gebhardt C. Analysis of Natural Variation of the Potato Tuber Proteome Reveals Novel Candidate Genes for Tuber Bruising. J Proteome Res 2011; 11:703-16. [DOI: 10.1021/pr2006186] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Claude Urbany
- Max Planck Institute for Plant Breeding Research, 50829 Cologne, Germany
| | - Thomas Colby
- Max Planck Institute for Plant Breeding Research, 50829 Cologne, Germany
| | - Benjamin Stich
- Max Planck Institute for Plant Breeding Research, 50829 Cologne, Germany
| | - Lysann Schmidt
- Max Planck Institute for Plant Breeding Research, 50829 Cologne, Germany
| | - Jürgen Schmidt
- Max Planck Institute for Plant Breeding Research, 50829 Cologne, Germany
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Emami K, Morris NJ, Cockell SJ, Golebiowska G, Shu QY, Gatehouse AMR. Changes in protein expression profiles between a low phytic acid rice ( Oryza sativa L. Ssp. japonica) line and its parental line: a proteomic and bioinformatic approach. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2010; 58:6912-6922. [PMID: 20441221 DOI: 10.1021/jf904082b] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The seed proteome of a low phytic acid (lpa) rice line (Os-lpa-XS110-1), developed as a novel food source, was compared to that of its parental line, Xiushui 110 (XS-110). Analysis by surfaced enhanced laser desorption ionization-time-of-flight mass spectrometry (SELDI-TOF MS) and two-dimensional gel electrophoresis (2-DE) allowed the detection of a potential low molecular weight biomarker and identification of 23 differentially expressed proteins that include stress-related proteins, storage proteins, and potential allergens. Bioinformatic analyses revealed that triose phosphate isomerase (TPI) and fructose bisphosphatealdolase (FBA), two major differentially expressed proteins, are involved in myo-inositol metabolism. Accumulation of globulin was also significantly decreased in the lpa line. This study demonstrates the potential of proteomic and bioinformatic profiling techniques for safety assessment of novel foods. Furthermore, these techniques provide powerful tools for studying functional genomics due to the possibility of identifying genes related to the mutated traits.
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Affiliation(s)
- Kaveh Emami
- School of Biology, Institute for Research on Environment and Sustainability, Newcastle University, Newcastle upon Tyne NE17RU, United Kingdom
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Goulet C, Benchabane M, Anguenot R, Brunelle F, Khalf M, Michaud D. A companion protease inhibitor for the protection of cytosol-targeted recombinant proteins in plants. PLANT BIOTECHNOLOGY JOURNAL 2010; 8:142-54. [PMID: 20051033 DOI: 10.1111/j.1467-7652.2009.00470.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
We reported earlier the potential of tomato cathepsin D inhibitor (SlCDI) as an in-built stabilizing agent for the protection of recombinant proteins in transgenic plant leaf crude extracts (Plant Biotechnol J.4, 359-368). Here we document the potential of SlCDI for the in situ protection of proteins in potato leaves. Total protein assays with control and SlCDI-expressing potato lines indicated a positive impact of slcdi transgene expression on leaf protein content, with a mean relative increase of 35%-40% depending on the light regime. Out of approximately 700 proteins detected on 2-D gels, only 20 exhibited a significantly altered level on a protein-specific basis, whereas most proteins were up-regulated on a leaf fresh weight basis, albeit at variable rates. Quantitative reverse trancriptase-PCR assays for rubisco activase showed similar transcript levels in leaves of test and control lines despite protein levels increased by two- to threefold in SlCDI-expressing lines. These observations, along with the unrelated biological functions assigned to MS-identified proteins up-regulated in leaves and protease assays showing slightly increased proteasome activity in protein extracts of SlCDI-expressing lines, suggest a general, proteasome-independent protein stabilizing effect of SlCDI in planta. Transient expression assays with human alpha(1)-antichymotrypsin also showed a stabilizing effect for SlCDI on heterologous proteins, leading to net levels of the human protein increased by approximately 2.5-fold in SlCDI-expressing plants. These data illustrate, overall, the potential of SlCDI as an in vivo protein-stabilizing agent in transgenic plant systems, useful to improve protein levels and recombinant protein accumulation.
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Affiliation(s)
- Charles Goulet
- CRH/INAF, Pavillon des Services (INAF), Université Laval, Québec, QC, Canada
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Gao C, Zhang F, Zhang J, Guo S, Shao H. Identification of Anoectochilus based on rDNA ITS sequences alignment and SELDI-TOF-MS. Int J Biol Sci 2009; 5:727-35. [PMID: 20016748 PMCID: PMC2793310 DOI: 10.7150/ijbs.5.727] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2009] [Accepted: 11/26/2009] [Indexed: 11/17/2022] Open
Abstract
The internal transcribed spacer (ITS) sequences alignment and proteomic difference of Anoectochilus interspecies have been studied by means of ITS molecular identification and surface enhanced laser desorption ionization time of flight mass spectrography. Results showed that variety certification on Anoectochilus by ITS sequences can not determine species, and there is proteomic difference among Anoectochilus interspecies. Moreover, proteomic finger printings of five Anoectochilus species have been established for identifying species, and genetic relationships of five species within Anoectochilus have been deduced according to proteomic differences among five species.
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Affiliation(s)
- Chuan Gao
- Institute of Medicinal Plant Development, Beijing Union Medical College/Chinese Academy of Medicinal Sciences, China
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On-chip detection of low-molecular-weight recombinant proteins in plant crude extracts by SELDI-TOF MS. Methods Mol Biol 2009; 483:313-24. [PMID: 19183907 DOI: 10.1007/978-1-59745-407-0_18] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
This chapter presents a general procedure for the on-chip detection and quantitation of low-molecular-weight recombinant proteins in transgenic plant crude extracts by surface-enhanced laser desorption ionization time-of-flight mass spectrometry (SELDI-TOF MS). A protocol is first described to detect the protein of interest in crude protein extracts of transgenic plant lines, by differential protein mapping against similar extracts from a control, nontransgenic line. A complementary protocol is then presented to generate a standard curve with the SELDI system, allowing the protein to be quantified in different transgenic lines. Overall, this procedure may be carried out within a few hours, without the need for prior purification or enrichment of the recombinant protein.
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Badri MA, Rivard D, Coenen K, Michaud D. Unintended molecular interactions in transgenic plants expressing clinically useful proteins: The case of bovine aprotinin traveling the potato leaf cell secretory pathway. Proteomics 2009; 9:746-56. [DOI: 10.1002/pmic.200700234] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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