title: Transcriptional regulation of the human Raver2 ribonucleoprotein gene.
abstract: Raver2 is a putative modulator of the activity of the polypyrimidine-tract binding protein (PTB), one of the most intensively studied splicing repressors. Little is known about Raver2 expression, and all current data is from mice where it shows tissue specificity. In the present study, by comparing Raver2 transcript expression in human and mouse tissues, we found that human Raver2 is ubiquitously expressed in adult tissues. In order to investigate human Raver2 transcription regulation, we identified and characterized a putative promoter region in a 1000bp region upstream of the transcription starting site of the gene. Dual luciferase reporter assays demonstrated that this region had promoter activity conferred by the first 160bp. By mutagenic analyses of putative cis-acting regulatory sequences, we identified an individual site that decreased the promoter activity by up to 40% when mutated. Together, our results suggest that regulation of human Raver2 expression involves TATA-less transcriptional activity.
authors.affiliation: Department of Life and Reproduction Sciences, Section of Biology and Genetics, University of Verona, Strada le Grazie 8, 37134 Verona, Italy. mariagrazia.romanelli@univr.it
authors.forename: Maria Grazia
authors.initials: MG
authors.lastname: Romanelli
authors.forename: Pamela
authors.initials: P
authors.lastname: Lorenzi
authors.forename: Erica
authors.initials: E
authors.lastname: Diani
authors.forename: Agnese
authors.initials: A
authors.lastname: Filippello
authors.forename: Francesca
authors.initials: F
authors.lastname: Avesani
authors.forename: Carlo
authors.initials: C
authors.lastname: Morandi
mesh_terms: D024506:5' Flanking Region; D000818:Animals; D001483:Base Sequence; D005786:Gene Expression Regulation; D006367:HeLa Cells; D034441:Heterogeneous-Nuclear Ribonucleoproteins / Q000235:genetics*; D006801:Humans; D051379:Mice; D008969:Molecular Sequence Data; D011401:Promoter Regions, Genetic; D012045:Regulatory Sequences, Nucleic Acid; D016415:Sequence Alignment; D014162:Transfection
chemical_list: D034441:Heterogeneous-Nuclear Ribonucleoproteins; C571037:RAVER2 protein, human; C503919:Raver2 protein, mouse