TY  - JOUR
AU  - Prodanović, Radivoje
AU  - Ostafe, Raluca
AU  - Blanusa, Milan
AU  - Schwaneberg, Ulrich
PY  - 2012
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/1525
AB  - A Vanadium bromoPeroxidase-coupled fluorescent assay (ViPer) for ultrahigh-throughput screening of glucose oxidase (GOx) gene libraries employing double emulsions and flow cytometry was developed. The assay is based on detection of the product of a GOx reaction, hydrogen peroxide, that is first converted to a hypobromide by vanadium bromoperoxidase in the presence of sodium bromide. The hypobromide is afterwards detected in a reaction with a fluorogenic probe, 3-carboxy-7-(4'-aminophenoxy)-coumarine, where fluorescent 3-carboxy-coumarine is released. The ViPer screening system is three times more sensitive than a horseradish peroxidase coupled detection system and more resistant to bleaching of fluorescence in excess of peroxide. Using the ViPer screening system a high epPCR gene library containing 100,000 different GOx variants was screened for active clones in less than 1 h by flow cytometry. A library containing 0.15 % of yeast cells expressing active enzyme variants and with an average GOx activity in the liquid culture of 0.47 U/mL, after one round of sorting, had 28.12 % of the yeast cells expressing the active GOx (an enrichment factor of 200) and 26.8 U/mL of the GOx activity in the liquid culture (an enrichment factor of 57). The developed screening system could be adapted and used in a directed evolution of GOx and other hydrogen peroxide-producing enzymes (oxidases) and glycosidases if coupled with a carbohydrate oxidase.
PB  - Springer Heidelberg, Heidelberg
T2  - Analytical and Bioanalytical Chemistry
T1  - Vanadium bromoperoxidase-coupled fluorescent assay for flow cytometry sorting of glucose oxidase gene libraries in double emulsions
VL  - 404
IS  - 5
SP  - 1439
EP  - 1447
DO  - 10.1007/s00216-012-6234-x
ER  - 

@article{
author = "Prodanović, Radivoje and Ostafe, Raluca and Blanusa, Milan and Schwaneberg, Ulrich",
year = "2012",
abstract = "A Vanadium bromoPeroxidase-coupled fluorescent assay (ViPer) for ultrahigh-throughput screening of glucose oxidase (GOx) gene libraries employing double emulsions and flow cytometry was developed. The assay is based on detection of the product of a GOx reaction, hydrogen peroxide, that is first converted to a hypobromide by vanadium bromoperoxidase in the presence of sodium bromide. The hypobromide is afterwards detected in a reaction with a fluorogenic probe, 3-carboxy-7-(4'-aminophenoxy)-coumarine, where fluorescent 3-carboxy-coumarine is released. The ViPer screening system is three times more sensitive than a horseradish peroxidase coupled detection system and more resistant to bleaching of fluorescence in excess of peroxide. Using the ViPer screening system a high epPCR gene library containing 100,000 different GOx variants was screened for active clones in less than 1 h by flow cytometry. A library containing 0.15 % of yeast cells expressing active enzyme variants and with an average GOx activity in the liquid culture of 0.47 U/mL, after one round of sorting, had 28.12 % of the yeast cells expressing the active GOx (an enrichment factor of 200) and 26.8 U/mL of the GOx activity in the liquid culture (an enrichment factor of 57). The developed screening system could be adapted and used in a directed evolution of GOx and other hydrogen peroxide-producing enzymes (oxidases) and glycosidases if coupled with a carbohydrate oxidase.",
publisher = "Springer Heidelberg, Heidelberg",
journal = "Analytical and Bioanalytical Chemistry",
title = "Vanadium bromoperoxidase-coupled fluorescent assay for flow cytometry sorting of glucose oxidase gene libraries in double emulsions",
volume = "404",
number = "5",
pages = "1439-1447",
doi = "10.1007/s00216-012-6234-x"
}

Prodanović, R., Ostafe, R., Blanusa, M.,& Schwaneberg, U.. (2012). Vanadium bromoperoxidase-coupled fluorescent assay for flow cytometry sorting of glucose oxidase gene libraries in double emulsions. in Analytical and Bioanalytical Chemistry
Springer Heidelberg, Heidelberg., 404(5), 1439-1447.
https://doi.org/10.1007/s00216-012-6234-x

Prodanović R, Ostafe R, Blanusa M, Schwaneberg U. Vanadium bromoperoxidase-coupled fluorescent assay for flow cytometry sorting of glucose oxidase gene libraries in double emulsions. in Analytical and Bioanalytical Chemistry. 2012;404(5):1439-1447.
doi:10.1007/s00216-012-6234-x .

Prodanović, Radivoje, Ostafe, Raluca, Blanusa, Milan, Schwaneberg, Ulrich, "Vanadium bromoperoxidase-coupled fluorescent assay for flow cytometry sorting of glucose oxidase gene libraries in double emulsions" in Analytical and Bioanalytical Chemistry, 404, no. 5 (2012):1439-1447,
https://doi.org/10.1007/s00216-012-6234-x . .