Abstract

The murine connexin 36 gene ( Cx36) encodes a gap-junction channel protein which is preferentially expressed in brain and retina. The human orthologue CX36 is located on chromosome 15q14, a region recently shown to contain a susceptibility gene for hereditary catatonic schizophrenia. Therefore, CX36 was considered as a positional candidate for mutational analysis. Three polymorphic sites within CX36 were found by sequencing the two exons, the intron–exon boundaries and the putative promoter region of the gene derived from patients and control subjects. No variant exclusively cosegregates with the disease in a large pedigree that mainly supports the chromosome 15q14 locus, providing evidence that CX36 is not causative for the pathogenesis of catatonic schizophrenia in this family.

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