PMID- 9073510 OWN - NLM STAT- MEDLINE DCOM- 19970505 LR - 20220311 IS - 0888-7543 (Print) IS - 0888-7543 (Linking) VI - 40 IP - 3 DP - 1997 Mar 15 TI - Structural organization of the human prostaglandin EP3 receptor subtype gene (PTGER3). PG - 425-34 AB - Prostaglandin EP3 receptor subtype is a seven-membrane-spanning protein with multiple C-terminal tails generated by alternative mRNA splicing. We report here the structural organization of the human EP3 gene (PTGER3). The human EP3 gene spanned more than 80 kb and was composed of 10 exons separated by nine introns. Exon 1 and the 5' 180-bp portion of exon 2 (exon 2a) encoded the seven transmembrane domains and 10 amino acid residues of the cytoplasmic tail, which are common to all EP3 isoforms. The 3' 3461-bp portion of exon 2 (exon 2b) or combinations of exons 3-10 encoded the EP3 isoform-specific C termini and formed their 3'-untranslated regions by multiple fashions of alternative mRNA splicing. Exons 2b, 4, 6, and 10 contained polyadenylation sites. The EP3 gene formed nine distinct mRNAs encoding eight EP3 isoforms, two of which were novel ones tentatively designated EP3-V and EP3-VI. The transcription initiation sites of the human EP3 gene were mapped 227 to approximately 231 bp upstream of the ATG start codon. The 360-bp 5'-flanking region contained a TATA box-like sequence, a GC box, and several cis-acting regulatory elements. The present study provides insight into the molecular mechanisms underlying the prostanoid receptor family. FAU - Kotani, M AU - Kotani M AD - Department of Medicine, Kyoto University Graduate School of Medicine, Kyoto, 606, Japan. FAU - Tanaka, I AU - Tanaka I FAU - Ogawa, Y AU - Ogawa Y FAU - Usui, T AU - Usui T FAU - Tamura, N AU - Tamura N FAU - Mori, K AU - Mori K FAU - Narumiya, S AU - Narumiya S FAU - Yoshimi, T AU - Yoshimi T FAU - Nakao, K AU - Nakao K LA - eng SI - GENBANK/D86087 SI - GENBANK/D86088 SI - GENBANK/D86089 SI - GENBANK/D86090 SI - GENBANK/D86091 SI - GENBANK/D86092 SI - GENBANK/D86093 SI - GENBANK/D86094 SI - GENBANK/D86095 SI - GENBANK/D86096 SI - GENBANK/D86097 SI - GENBANK/D86098 PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Genomics JT - Genomics JID - 8800135 RN - 0 (PTGER3 protein, human) RN - 0 (RNA, Messenger) RN - 0 (Receptors, Prostaglandin E) RN - 0 (Receptors, Prostaglandin E, EP3 Subtype) SB - IM MH - Alternative Splicing MH - Amino Acid Sequence MH - Base Sequence MH - Cloning, Molecular MH - Humans MH - Molecular Sequence Data MH - RNA, Messenger/genetics MH - Receptors, Prostaglandin E/*genetics MH - Receptors, Prostaglandin E, EP3 Subtype MH - Sequence Alignment MH - Sequence Analysis EDAT- 1997/03/15 00:00 MHDA- 1997/03/15 00:01 CRDT- 1997/03/15 00:00 PHST- 1997/03/15 00:00 [pubmed] PHST- 1997/03/15 00:01 [medline] PHST- 1997/03/15 00:00 [entrez] AID - S0888-7543(96)94585-1 [pii] AID - 10.1006/geno.1996.4585 [doi] PST - ppublish SO - Genomics. 1997 Mar 15;40(3):425-34. doi: 10.1006/geno.1996.4585.