Characterization of Anopheles dirus glutathione transferase epsilon 4

The coding sequences of a wild type glutathione transferase (GST) Epsilon 4 and three isoenzymes were obtained by RT-PCR from a Thai malaria mosquito, Anopheles dirus. After confirmation by sequencing, the RT-PCR products were subcloned into an expression vector and proteins were expressed, purified...

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Main Authors: Gulsiri Charoensilp, Ardcharapom Vararattanavech, Posri Leelapat, La Aied Prapanthadara, Albert J. Ketterman
Format: Journal
Published: 2018
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http://cmuir.cmu.ac.th/jspui/handle/6653943832/61967
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Institution: Chiang Mai University
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spelling th-cmuir.6653943832-619672018-09-11T09:03:06Z Characterization of Anopheles dirus glutathione transferase epsilon 4 Gulsiri Charoensilp Ardcharapom Vararattanavech Posri Leelapat La Aied Prapanthadara Albert J. Ketterman Multidisciplinary The coding sequences of a wild type glutathione transferase (GST) Epsilon 4 and three isoenzymes were obtained by RT-PCR from a Thai malaria mosquito, Anopheles dirus. After confirmation by sequencing, the RT-PCR products were subcloned into an expression vector and proteins were expressed, purified, and biochemically characterized to study the function of these enzymes and for comparison with two orthologs from An. gambiae (agGSTE4-4) and Aedes aegypti (aaGSTE4-4). The results showed that An. dirus GST Epsilon 4 (adGSTE4-4) shares more than 85% amino acid sequence similarity with agGSTE4-4 and aaGSTE44. However, adGSTE4-4 possesses a greater catalytic efficiency (k cat/Km) for 1-chloro-2,4-dinitrobenzene as well as greater activities for several other substrates compared with agGSTE4-4 and aaGSTE4-4. Moreover, adGSTE4-4 enzyme possesses peroxidase and DDT dehydrochlorinase activities while these activities were not observed for agGSTE4-4. In addition, adGSTE4-4 binds two pyrethroid insecticides (permethrin and 1-cyhalothrin) with a relatively high affinity. We conclude that adGSTE4-4, unlike agGSTE4-4, can contribute to DDT resistance by DDT dehydrochlorinase activity as well as to pyrethroid resistance by sequestration and protection against oxidation from secondary pyrethroid metabolites via its peroxidase activity. 2018-09-11T09:03:06Z 2018-09-11T09:03:06Z 2006-06-01 Journal 15131874 2-s2.0-33746032499 10.2306/scienceasia1513-1874.2006.32.159 https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=33746032499&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/61967
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
topic Multidisciplinary
spellingShingle Multidisciplinary
Gulsiri Charoensilp
Ardcharapom Vararattanavech
Posri Leelapat
La Aied Prapanthadara
Albert J. Ketterman
Characterization of Anopheles dirus glutathione transferase epsilon 4
description The coding sequences of a wild type glutathione transferase (GST) Epsilon 4 and three isoenzymes were obtained by RT-PCR from a Thai malaria mosquito, Anopheles dirus. After confirmation by sequencing, the RT-PCR products were subcloned into an expression vector and proteins were expressed, purified, and biochemically characterized to study the function of these enzymes and for comparison with two orthologs from An. gambiae (agGSTE4-4) and Aedes aegypti (aaGSTE4-4). The results showed that An. dirus GST Epsilon 4 (adGSTE4-4) shares more than 85% amino acid sequence similarity with agGSTE4-4 and aaGSTE44. However, adGSTE4-4 possesses a greater catalytic efficiency (k cat/Km) for 1-chloro-2,4-dinitrobenzene as well as greater activities for several other substrates compared with agGSTE4-4 and aaGSTE4-4. Moreover, adGSTE4-4 enzyme possesses peroxidase and DDT dehydrochlorinase activities while these activities were not observed for agGSTE4-4. In addition, adGSTE4-4 binds two pyrethroid insecticides (permethrin and 1-cyhalothrin) with a relatively high affinity. We conclude that adGSTE4-4, unlike agGSTE4-4, can contribute to DDT resistance by DDT dehydrochlorinase activity as well as to pyrethroid resistance by sequestration and protection against oxidation from secondary pyrethroid metabolites via its peroxidase activity.
format Journal
author Gulsiri Charoensilp
Ardcharapom Vararattanavech
Posri Leelapat
La Aied Prapanthadara
Albert J. Ketterman
author_facet Gulsiri Charoensilp
Ardcharapom Vararattanavech
Posri Leelapat
La Aied Prapanthadara
Albert J. Ketterman
author_sort Gulsiri Charoensilp
title Characterization of Anopheles dirus glutathione transferase epsilon 4
title_short Characterization of Anopheles dirus glutathione transferase epsilon 4
title_full Characterization of Anopheles dirus glutathione transferase epsilon 4
title_fullStr Characterization of Anopheles dirus glutathione transferase epsilon 4
title_full_unstemmed Characterization of Anopheles dirus glutathione transferase epsilon 4
title_sort characterization of anopheles dirus glutathione transferase epsilon 4
publishDate 2018
url https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=33746032499&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/61967
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