title: Promoter structure and gene expression of the mouse inositol 1,4,5-trisphosphate receptor type 3 gene.
abstract: Inositol 1,4,5-trisphosphate receptor type 3 (IP(3)R3) is a ubiquitously expressed IP(3)R gene in the IP(3)R gene family. We identified an upstream region of the mouse IP(3)R3 genomic DNA. Transcription start points for the IP(3)R3 gene were found to be located mainly at four sites between nucleotide position -325 and -285 relative to the first ATG codon. The major start point was mapped around -325. Transcription promotion ability was detected between -325 and -285 in an IP(3)R3 proximal promoter sequence. The promoter had no TATA-box but was highly GC-rich and contained two putative Sp1-binding sites. There was no sequence similarity between promoter regions of IP(3)R3 and IP(3)R2, another ubiquitous gene, except for GC-boxes. By using a series of 5'-truncation versions and a transient luciferase assay, we detected multiple common and cell-type-dependent regulatory regions within the distal promoter sequence downstream from -4.0 kb that function positively or negatively. The IP(3)R3 gene was highly transcribed in the kidney, spleen, heart, and skeletal muscle, and this tissue distribution pattern was nearly complementary to that of IP(3)R2. We found that IP(3)R3 gene expression was repressed in retinoic acid-treated and neural differentiated P19 mouse embryonic carcinoma cells.
authors.affiliation: Department of Biology, Faculty of Science, Chiba University, Inage-ku, Chiba 263-8522, Japan. tamura@bio.s.chiba-u.ac.jp
authors.forename: T
authors.initials: T
authors.lastname: Tamura
authors.forename: M
authors.initials: M
authors.lastname: Hashimoto
authors.forename: J
authors.initials: J
authors.lastname: Aruga
authors.forename: Y
authors.initials: Y
authors.lastname: Konishi
authors.forename: M
authors.initials: M
authors.lastname: Nakagawa
authors.forename: T
authors.initials: T
authors.lastname: Ohbayashi
authors.forename: M
authors.initials: M
authors.lastname: Shimada
authors.forename: K
authors.initials: K
authors.lastname: Mikoshiba
mesh_terms: D016475:3T3 Cells; D024506:5' Flanking Region / Q000235:genetics; D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D015152:Blotting, Northern; D015220:Calcium Channels / Q000235:genetics*; D002454:Cell Differentiation / Q000235:genetics; D002460:Cell Line; D018387:Codon, Initiator / Q000235:genetics; D004247:DNA / Q000737:chemistry / Q000235:genetics; D015536:Down-Regulation; D015870:Gene Expression; D005786:Gene Expression Regulation; D006367:HeLa Cells; D006801:Humans; D053496:Inositol 1,4,5-Trisphosphate Receptors; D008156:Luciferases / Q000235:genetics / Q000378:metabolism; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D008969:Molecular Sequence Data; D009474:Neurons / Q000166:cytology / Q000378:metabolism; D011401:Promoter Regions, Genetic / Q000235:genetics*; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D018160:Receptors, Cytoplasmic and Nuclear / Q000235:genetics*; D011993:Recombinant Fusion Proteins / Q000235:genetics / Q000378:metabolism; D012045:Regulatory Sequences, Nucleic Acid / Q000235:genetics; D017422:Sequence Analysis, DNA; D014018:Tissue Distribution; D024363:Transcription Initiation Site; D014407:Tumor Cells, Cultured
chemical_list: D015220:Calcium Channels; D018387:Codon, Initiator; C506926:ITPR1 protein, human; D053496:Inositol 1,4,5-Trisphosphate Receptors; D012333:RNA, Messenger; D018160:Receptors, Cytoplasmic and Nuclear; D011993:Recombinant Fusion Proteins; D004247:DNA; D008156:Luciferases