title: Canine sulfotransferase SULT1A1: molecular cloning, expression, and characterization.
abstract: Sulfotransferases (SULTs) are involved in detoxification and activation of various endogenous and exogenous compounds including important drugs and hormones. SULT1A, the phenol-SULT subfamily, is the most prominent subfamily in xenobiotic metabolism and has been found in several species, e.g., human, rat, and mouse. We have cloned a phenol-sulfating phenol SULT from dog (cSULT1A1) and expressed it in Escherichia coli for characterization. cSULT1A1 showed 85.8, 82.7, 76.3, and 73.6% identities to human P-PST, human M-PST, rat PST-1, and mouse STp1, respectively. It consists of 295 amino acids, which is in agreement with the human ortholog and sulfate substrates typical for the SULT1A family, i.e., p-nitrophenol (PNP), alpha-naphthol, and dopamine. The K(m) for PNP was found to be within the nanomolar range. It also sulfates minoxidil and beta-estradiol but not dehydroepiandrosterone. Western blot analysis indicated that this newly cloned enzyme was found to be ubiquitously expressed in canine tissues with highest expression in male and female liver.
authors.affiliation: Institute of Environmental Medicine, Karolinska Institutet, P.O. Box 210, SE-171 77 Stockholm, Sweden. carrie.tsoi@astrazeneca.com
authors.forename: Carrie
authors.initials: C
authors.lastname: Tsoi
authors.forename: Ralf
authors.initials: R
authors.lastname: Morgenstern
authors.forename: Stellan
authors.initials: S
authors.lastname: Swedmark
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D015239:Arylsulfotransferase; D001483:Base Sequence; D003001:Cloning, Molecular; D003429:Cross Reactions; D018076:DNA, Complementary / Q000235:genetics / Q000302:isolation & purification; D004285:Dogs; D004926:Escherichia coli / Q000235:genetics; D005260:Female; D015870:Gene Expression; D006801:Humans; D015151:Immunoblotting; D007120:Immunochemistry; D008297:Male; D051379:Mice; D008969:Molecular Sequence Data; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D051381:Rats; D011994:Recombinant Proteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism; D017386:Sequence Homology, Amino Acid; D013045:Species Specificity; D013379:Substrate Specificity; D015238:Sulfotransferases / Q000737:chemistry / Q000235:genetics* / Q000378:metabolism; D014018:Tissue Distribution
chemical_list: D018076:DNA, Complementary; D012333:RNA, Messenger; D011994:Recombinant Proteins; D015238:Sulfotransferases; D015239:Arylsulfotransferase; C117544:SULT1A1 protein, human; C513291:Sult1a1 protein, mouse