PMID- 8698335 OWN - NLM STAT- MEDLINE DCOM- 19960905 LR - 20231213 IS - 0340-6717 (Print) IS - 0340-6717 (Linking) VI - 98 IP - 2 DP - 1996 Aug TI - X-linked dominant Charcot-Marie-Tooth neuropathy (CMTX): new mutations in the connexin32 gene. PG - 172-5 AB - X-linked dominant Charcot-Marie-Tooth (CMTX) neuropathy has been mapped to the Xq13 region. Subsequently, several mutations that could account for CMTX have been detected in the coding part of the connexin32 (Cx32) gene, which is located within this region. In order to develop more specific diagnostic tools, we have begun a systematic screening of families with dominant CMTX for mutations in the coding region of the Cx32 gene. This report describes a study of ten families and different mutations segregating with the disease were detected in five of them. In addition to the previously reported Arg22stop and Arg215Trp substitutions, three novel mutations are described, including two different missense mutations at codon Arg22 (Arg22Pro and Arg22Gly), and a nonsense mutation at codon Trp133. The identification of new CMTX-causing mutations is a critical step for carrier detection and presymptomatic diagnosis, and should provide essential information on the structure-function relationship of Cx32 in vitro as well as in vivo. FAU - Ressot, C AU - Ressot C AD - Laboratoire de Neurogenetique Moleculaire, URA 1488 CNRS, Universite de Paris VI, France. FAU - Latour, P AU - Latour P FAU - Blanquet-Grossard, F AU - Blanquet-Grossard F FAU - Sturtz, F AU - Sturtz F FAU - Duthel, S AU - Duthel S FAU - Battin, J AU - Battin J FAU - Corbillon, E AU - Corbillon E FAU - Ollagnon, E AU - Ollagnon E FAU - Serville, F AU - Serville F FAU - Vandenberghe, A AU - Vandenberghe A FAU - Dautigny, A AU - Dautigny A FAU - Pham-Dinh, D AU - Pham-Dinh D LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Germany TA - Hum Genet JT - Human genetics JID - 7613873 RN - 0 (Codon) RN - 0 (Codon, Nonsense) RN - 0 (Connexins) RN - 9007-49-2 (DNA) SB - IM MH - Amino Acid Sequence MH - Base Sequence MH - Charcot-Marie-Tooth Disease/*genetics MH - Codon/genetics MH - Codon, Nonsense/genetics MH - Connexins/chemistry/*genetics MH - DNA/genetics MH - Female MH - Genes, Dominant MH - Genetic Linkage MH - Humans MH - Male MH - *Mutation MH - Pedigree MH - Point Mutation MH - Polymerase Chain Reaction MH - Polymorphism, Single-Stranded Conformational MH - X Chromosome/*genetics MH - Gap Junction beta-1 Protein EDAT- 1996/08/01 00:00 MHDA- 1996/08/01 00:01 CRDT- 1996/08/01 00:00 PHST- 1996/08/01 00:00 [pubmed] PHST- 1996/08/01 00:01 [medline] PHST- 1996/08/01 00:00 [entrez] AID - 10.1007/s004390050183 [doi] PST - ppublish SO - Hum Genet. 1996 Aug;98(2):172-5. doi: 10.1007/s004390050183.