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אסיף מאגר המחקר החקלאי
פותח על ידי קלירמאש פתרונות בע"מ -
Development of polyclonal antibodies for detection of aflatoxigenic molds involving culture filtrate and chimeric proteins expressed in Escherichia coli
Year:
1997
Authors :
מנשרוב, מזל
;
.
סלומון, רפי
;
.
פסטר, נחמן
;
.
Volume :
63
Co-Authors:
Shapira, R., Inst. Biochem., Food Sci. and Nutr., Faculty of Agriculture, Hebrew University of Jerusalem, Rehovot 76100, Israel
Paster, N., Department of Stored Products, Agricultural Research Organization, Volcani Center, Bet Dagan 50250, Israel
Menasherov, M., Department of Stored Products, Agricultural Research Organization, Volcani Center, Bet Dagan 50250, Israel
Eyal, O., Inst. Biochem., Food Sci. and Nutr., Faculty of Agriculture, Hebrew University of Jerusalem, Rehovot 76100, Israel
Mett, A., Inst. Biochem., Food Sci. and Nutr., Faculty of Agriculture, Hebrew University of Jerusalem, Rehovot 76100, Israel
Meiron, T., Inst. Biochem., Food Sci. and Nutr., Faculty of Agriculture, Hebrew University of Jerusalem, Rehovot 76100, Israel
Kuttin, E., Institute for Biological Research, Nes Ziona 70450, Israel
Salomon, R., Department of Virology, Agricultural Research Organization, Volcani Center, Bet Dagan 50250, Israel
Facilitators :
From page:
990
To page:
995
(
Total pages:
6
)
Abstract:
Polyclonal antibodies (PAb) were raised against an aflatoxigenic strain of Aspergillus parasiticus by using two different sources for antibody elicitation: (i) filtrate of a culture on which the fungus had been grown (ii) and two chimeric proteins, expressed in Escherichia coli as separate products, of the genes ver-1 and apa-2, which are involved in aflatoxin biosynthesis. The gene products were amplified by PCR, and each was cloned into the E. coli expression vector pGEX2T. Upon induction, the bacteria overexpressed 38- and 33-kDa chimeric proteins corresponding to the N- terminal domains of the genes ver-1 and apa-2, respectively. The chimeric proteins were isolated and affinity purified for use as antigens. The specificity of the raised antibodies was examined by enzyme-linked immunosorbent assay (ELISA). The PAbs raised against the culture filtrate reacted with all the species of Aspergillus and Penicillium tested but not with Fusarium species or corn grain. However, the PAbs elicited against the chimeric proteins were highly specific, showing significantly higher ELISA absorbance values (A405) against A. parasiticus and A. flavus than against the other fungi tested and the corn grain. The approach of utilizing gene products associated with aflatoxin biosynthesis for antibody production therefore appears to be feasible. Such a multiantibody system combined with the PCR technique, could provide a useful tool for the rapid, sensitive, and accurate detection of aflatoxin producers present in grains and foods.
Note:
Related Files :
animal experiment
Animals
Aspergillus
fungi
Fusarium
gene expression
Penicillium
Zea mays
עוד תגיות
תוכן קשור
More details
DOI :
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
26154
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:20
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Scientific Publication
Development of polyclonal antibodies for detection of aflatoxigenic molds involving culture filtrate and chimeric proteins expressed in Escherichia coli
63
Shapira, R., Inst. Biochem., Food Sci. and Nutr., Faculty of Agriculture, Hebrew University of Jerusalem, Rehovot 76100, Israel
Paster, N., Department of Stored Products, Agricultural Research Organization, Volcani Center, Bet Dagan 50250, Israel
Menasherov, M., Department of Stored Products, Agricultural Research Organization, Volcani Center, Bet Dagan 50250, Israel
Eyal, O., Inst. Biochem., Food Sci. and Nutr., Faculty of Agriculture, Hebrew University of Jerusalem, Rehovot 76100, Israel
Mett, A., Inst. Biochem., Food Sci. and Nutr., Faculty of Agriculture, Hebrew University of Jerusalem, Rehovot 76100, Israel
Meiron, T., Inst. Biochem., Food Sci. and Nutr., Faculty of Agriculture, Hebrew University of Jerusalem, Rehovot 76100, Israel
Kuttin, E., Institute for Biological Research, Nes Ziona 70450, Israel
Salomon, R., Department of Virology, Agricultural Research Organization, Volcani Center, Bet Dagan 50250, Israel
Development of polyclonal antibodies for detection of aflatoxigenic molds involving culture filtrate and chimeric proteins expressed in Escherichia coli
Polyclonal antibodies (PAb) were raised against an aflatoxigenic strain of Aspergillus parasiticus by using two different sources for antibody elicitation: (i) filtrate of a culture on which the fungus had been grown (ii) and two chimeric proteins, expressed in Escherichia coli as separate products, of the genes ver-1 and apa-2, which are involved in aflatoxin biosynthesis. The gene products were amplified by PCR, and each was cloned into the E. coli expression vector pGEX2T. Upon induction, the bacteria overexpressed 38- and 33-kDa chimeric proteins corresponding to the N- terminal domains of the genes ver-1 and apa-2, respectively. The chimeric proteins were isolated and affinity purified for use as antigens. The specificity of the raised antibodies was examined by enzyme-linked immunosorbent assay (ELISA). The PAbs raised against the culture filtrate reacted with all the species of Aspergillus and Penicillium tested but not with Fusarium species or corn grain. However, the PAbs elicited against the chimeric proteins were highly specific, showing significantly higher ELISA absorbance values (A405) against A. parasiticus and A. flavus than against the other fungi tested and the corn grain. The approach of utilizing gene products associated with aflatoxin biosynthesis for antibody production therefore appears to be feasible. Such a multiantibody system combined with the PCR technique, could provide a useful tool for the rapid, sensitive, and accurate detection of aflatoxin producers present in grains and foods.
Scientific Publication
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