Cloning and Expression of a Novel Sulfotransferase with Unique Substrate Specificity from Bombyx mori
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概要
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We identified a cDNA encoding a putative cytosolic sulfotransferase (SULT) by searching the expressed sequence tag database of Bombyx mori, and subsequently obtained the full-length cDNA for this gene via rapid amplification of cDNA ends (RACE). We designated this gene bmST1, and showed by sequence analysis that it belongs to a novel SULT family. The tissue specificity of bmST1 mRNA expression was examined in fifth instar larvae by reverse transcriptase-polymerase chain reaction (RT-PCR), and transcripts were detectable in the silk gland, gut, fat body, and Malpighian tube. A recombinant form of bmST1 was then expressed using a gluthathione S-transferase (GST) gene fusion system, and it was purified from Escherichia coli. Purified bmST1 did not exhibit sulfating activity toward SULT substrates such as 4-nitrophenol, vanillin, hydroxysteroids, or monoamines. Surprisingly, however, recombinant bmST1 showed considerable activity toward 4-nitrocatechol and also gallate esters, although the catechins are not sulfated by this enzyme.
- 社団法人 日本農芸化学会の論文
- 2007-04-23
著者
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TAMURA Hiro-omi
Kyoritsu College of Pharacy
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Hattori Kenji
Kyoritsu University of Pharmacy
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Hamamoto Hiroshi
Graduate School Of Pharmaceutical Sciences The University Of Tokyo
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Sekimizu Kazuhisa
Graduate School Of Pharmaceutical Sciences The University Of Tokyo
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Hattori Kenji
Kyoritsu Univ. Of Pharmacy
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HIRAYAMA Mio
Kyoritsu University of Pharmacy
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SUZUKI Hiroko
Kyoritsu University of Pharmacy
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Tamura Hiro-omi
Kyoritsu Univ. Of Pharmacy
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Hattori Kenji
Kyoritsu College Of Pharmacy
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SEKIMIZU Kazuhisa
Graduate School of Pharmaceutical Sciences, The University of Tokyo
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