title: Molecular cloning of the cDNA encoding a murine sialic acid-specific 9-O-acetylesterase and RNA expression in cells of hematopoietic and non-hematopoietic origin.
abstract: We describe the isolation of a cDNA encoding a murine sialic acid-specific 9-O-acetylesterase as well as its expression pattern in cells of both hematopoietic and non-hematopoietic origin. This enzyme catalyzes the removal of O-acetyl ester groups from position 9 of the parent sialic acid N-acetylneuraminic acid. The cDNA is 2105 nt in length and encodes a protein of 541 amino acids with a predicted molecular weight of 61 kDa, not including oligosaccharides linked to eight potential N-glycosylation sites. The cDNA encoding the acetylesterase displays a widespread distribution in various cell lines and tissues. Expression studies of B lineage cell lines and primary fetal liver cells revealed a developmentally regulated expression pattern in cells of hematopoietic origin. Given the importance of 9-O-acetylation of sialic acids, the cloning of the cDNA encoding a sialic acid-specific 9-O-acetylesterase will be helpful in understanding further the regulation of this post-translational modification and the biological consequences thereof.
authors.affiliation: The Wellesley Hospital Research Institute, University of Toronto, Ontario, Canada.
authors.forename: A
authors.initials: A
authors.lastname: Stoddart
authors.forename: Y
authors.initials: Y
authors.lastname: Zhang
authors.forename: C J
authors.initials: CJ
authors.lastname: Paige
mesh_terms: D000115:Acetylesterase; D000595:Amino Acid Sequence; D000818:Animals; D001402:B-Lymphocytes / Q000737:chemistry; D015152:Blotting, Northern; D002265:Carboxylic Ester Hydrolases / Q000737:chemistry* / Q000235:genetics; D002478:Cells, Cultured; D003001:Cloning, Molecular; D017931:DNA Primers; D018076:DNA, Complementary / Q000737:chemistry / Q000235:genetics; D018507:Gene Expression Regulation, Developmental / Q000235:genetics*; D008099:Liver / Q000196:embryology; D051379:Mice; D008815:Mice, Inbred Strains; D008969:Molecular Sequence Data; D016415:Sequence Alignment; D017421:Sequence Analysis; D012794:Sialic Acids / Q000378:metabolism*; D013234:Stem Cells / Q000737:chemistry
chemical_list: D017931:DNA Primers; D018076:DNA, Complementary; D012794:Sialic Acids; C025676:9-O-acetyl-N-acetylneuraminic acid; D002265:Carboxylic Ester Hydrolases; D000115:Acetylesterase; C046298:sialate O-acetylesterase