1. A gene from the Xp22.3 region shares homology with voltage-gated chloride channels
- Author
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Giovanni Battista Ferrero, Alessandra Grillo, Gluseppe Borsanil, Elena I. Rugarli, Maria T.Bassl, Martin C. Wapenaar, Lisa de Concillls, Huda Y.Zoghbl, Andrea Ballabio, Marjon van Slegtenhorst, Brunella Franco, VAN SLEGTENHORST, M. A., Bassi, M. T., Borsani, G, Wapenaar, M. C., Ferrero, G. B., DE CONCILIIS, L, Rugarli, E. I., Grillo, A, Franco, Brunella, Zoghbi, H. Y., and Ballabio, Andrea
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Male ,Molecular Sequence Data ,Muscle Proteins ,Nerve Tissue Proteins ,Sequence alignment ,Biology ,Torpedo ,Y chromosome ,Homology (biology) ,X chromosome ,Exon ,Species Specificity ,Gene mapping ,Chloride Channels ,Genetics ,Animals ,Humans ,Amino Acid Sequence ,Molecular Biology ,Gene ,Genetics (clinical) ,Brain Chemistry ,Base Sequence ,Sequence Homology, Amino Acid ,Myocardium ,Nucleic acid sequence ,General Medicine ,Molecular biology ,Rats ,Genes ,CLCN4 ,Chloride channel ,Organ Specificity ,Multigene Family ,Female ,Sequence Alignment - Abstract
In the framework of constructing a comprehensive transcript map of the human Xp22.3 region, we identified an evolutionary conserved CpG island and cloned the corresponding gene. The predicted 760 amino acid protein encoded by this gene contains 12 hydrophobic domains and shares significant sequence and structural similarities with all the previously isolated members of a recently identified family of voltage-gated chloride channels (the 'CIC family'). This gene, termed CICN4 (Chloride Channel 4), contains at least 10 exons spanning 60 to 80 kb on the X chromosome. In contrast to most genes isolated from the human Xp22.3 region, the CICN4 gene does not share homology with the Y chromosome and it is conserved in mouse and hamster. Expression studies revealed the presence of a 7.5 kb transcript which is particularly abundant in skeletal muscle and is also detectable in brain and heart. These data suggest that we have identified a new voltage-gated chloride channel which is encoded by a gene located in the distal short arm of the X chromosome.