PMID- 7607551 OWN - NLM STAT- MEDLINE DCOM- 19950815 LR - 20231213 IS - 0378-1119 (Print) IS - 0378-1119 (Linking) VI - 158 IP - 2 DP - 1995 Jun 9 TI - Use of alternate promoters for tissue-specific expression of the gene coding for connexin32. PG - 257-62 AB - The promoter of rat connexin32 (Cx32), the gap junction protein found in liver, was studied in transgenic mice. Cx32 transgenes, containing 2.5-kb of sequence upstream from the promoter, exon I, the entire 6.1-kb intron and the beginning of the coding sequence linked to the gene encoding luciferase (Luc), were found to be expressed in mouse in the same tissue-specific manner as previously reported for Cx32. Another construct lacking the promoter, but retaining 1.8 kb from the 3' end of the intron, was found to be expressed specifically in the nervous system. This result suggested that a second promoter, different from that used in liver, functions in nervous tissue. The use of this promoter in normal rats was corroborated by sequence analysis of reverse-transcribed PCR products obtained from rat nervous tissue RNA. The second promoter drives the synthesis of a second Cx32 mRNA species that is processed to remove a small 345-bp intron that shares its acceptor splice site with the large intron. This finding could have implications for the genetic basis of the X-linked form of Charcot-Marie-Tooth disease (CMT-X) in those patients that do not exhibit mutations in the Cx32-coding region. FAU - Neuhaus, I M AU - Neuhaus IM AD - Department of Biochemistry, University of Miami, School of Medicine, FL 33101, USA. FAU - Dahl, G AU - Dahl G FAU - Werner, R AU - Werner R LA - eng SI - GENBANK/L36875 SI - GENBANK/L36876 PT - Comparative Study PT - Journal Article PT - Research Support, U.S. Gov't, P.H.S. PL - Netherlands TA - Gene JT - Gene JID - 7706761 RN - 0 (Connexins) RN - 0 (RNA, Messenger) SB - IM MH - Animals MH - Base Sequence MH - Connexins/*genetics/isolation & purification MH - Fluorescent Antibody Technique MH - *Gene Expression Regulation MH - Liver/metabolism MH - Mice MH - Mice, Transgenic MH - Molecular Sequence Data MH - Nervous System/metabolism MH - Polymerase Chain Reaction MH - Promoter Regions, Genetic/*genetics MH - RNA, Messenger/analysis/genetics MH - Rats MH - Tissue Distribution MH - Gap Junction beta-1 Protein EDAT- 1995/06/09 00:00 MHDA- 1995/06/09 00:01 CRDT- 1995/06/09 00:00 PHST- 1995/06/09 00:00 [pubmed] PHST- 1995/06/09 00:01 [medline] PHST- 1995/06/09 00:00 [entrez] AID - 0378111994008994 [pii] AID - 10.1016/0378-1119(94)00899-4 [doi] PST - ppublish SO - Gene. 1995 Jun 9;158(2):257-62. doi: 10.1016/0378-1119(94)00899-4.