Novel splice variants of PACAP gene in mouse cerebellar granule cells.
The mouse pituitary adenylate cyclase activating polypeptide (PACAP) gene consists of two alternative exons (1A and 1B) and four exons including the coding region. By the usage of alternative exons, three transcripts can be produced. In this report, however, we found that at least five preproPACAP transcripts, including two novel types, were produced in mouse cerebellar granule cells (CGCs) and their expression was induced by the Ca2+ influx through L-type voltage-dependent Ca2+ channels. The splicing occurred between the 3'-donor site of exon 1A and the two novel internal 5'-acceptor sites of exon 1B. These findings suggest that preproPACAP transcripts are produced by the complicated usage of the 5'-untranslated region in an activity-dependent manner.
Tabuchi
A
A
Department of Biological Chemistry, Faculty of Pharmaceutical Sciences, Toyama Medical and Pharmaceutical University, Sugitani 2630, Toyama 930-0194, Japan.
Koizumi
M
M
Tsuda
M
M
D017398:Alternative Splicing; D000818:Animals; D001483:Base Sequence / Q000235:genetics; D002478:Cells, Cultured; D002531:Cerebellum / Q000378:metabolism*; D020869:Gene Expression Profiling / Q000379:methods; D051379:Mice; D008813:Mice, Inbred ICR; D009479:Neuropeptides / Q000235:genetics / Q000378:metabolism*; D051219:Pituitary Adenylate Cyclase-Activating Polypeptide
C495402:Adcyap1 protein, mouse; D009479:Neuropeptides; D051219:Pituitary Adenylate Cyclase-Activating Polypeptide