title: Specific species and tissue differences for the gene expression of calcium-binding protein regucalcin.
abstract: The existence and expression of gene encoding the Ca(2+)-binding protein regucalcin in various species and tissues were investigated with Southern and Northern hybridization analyses using regucalcin cDNA (0.9 kb of open reading frame). Genomic Southern hybridization analysis demonstrated that regucalcin gene was widely conserved among higher animals including human, monkey, rat, mouse, dog, bovine, rabbit and chicken. The gene was not found in yeast. The Northern blot analysis of poly (A) +RNAs extracted from the liver of various species showed that regucalcin mRNA was predominantly expressed in rat and mouse, although the expression was also seen in human, bovine and chicken. Furthermore, the enzyme-linked immunoadsorbent assay (ELISA) with rabbit-anti-regucalcin IgG indicated that hepatic regucalcin concentration was most pronounced in rat as compared with that of guinea pig, mouse and chicken. These observations show that the gene expression of regucalcin and its protein synthesis is unique in the liver of rats, suggesting the existence of a specific mechanism in demonstrating regucalcin synthesis from gene.
authors.affiliation: Laboratory of Metabolism and Endocrinology, Graduate School of Nutritional Sciences, University of Shizuoka, Japan.
authors.forename: N
authors.initials: N
authors.lastname: Shimokawa
authors.forename: M
authors.initials: M
authors.lastname: Isogai
authors.forename: M
authors.initials: M
authors.lastname: Yamaguchi
mesh_terms: D000818:Animals; D015152:Blotting, Northern; D015139:Blotting, Southern; D002135:Calcium-Binding Proteins / Q000096:biosynthesis / Q000235:genetics*; D002265:Carboxylic Ester Hydrolases; D002417:Cattle; D002540:Cerebral Cortex / Q000378:metabolism; D002645:Chickens; D004285:Dogs; D005786:Gene Expression Regulation; D006168:Guinea Pigs; D006801:Humans; D047908:Intracellular Signaling Peptides and Proteins; D007668:Kidney / Q000378:metabolism; D008099:Liver / Q000378:metabolism; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D009928:Organ Specificity; D011323:Primates; D012333:RNA, Messenger / Q000032:analysis*; D011817:Rabbits; D051381:Rats; D017208:Rats, Wistar; D013045:Species Specificity; D015238:Sulfotransferases; D015003:Yeasts
chemical_list: D002135:Calcium-Binding Proteins; D047908:Intracellular Signaling Peptides and Proteins; C513323:RGN protein, human; D012333:RNA, Messenger; C513324:Rgn protein, mouse; D015238:Sulfotransferases; C028152:alcohol sulfotransferase; D002265:Carboxylic Ester Hydrolases; C513325:Rgn protein, rat