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The human CYP2C locus: a prototype for intergenic and exon repetition splicing events.
In human there are four known CYP2C genes that have been mapped to chromosome 10q24 with the order Cen-2C18-2C19-2C9-2C8-Tel. Previously we have shown that splicing events joining exons from the neighboring 2C18 and 2C19 genes occur in human liver and epidermis. Here evidence is presented that the terminal genes of this cluster, 2C18 and 2C8, are also involved in intergenic splicing. Most interestingly, several of these 2C18/2C8 RNAs were composed of all nine exons, thus conceivably having the potential for coding functional proteins. Moreover, chimeric RNA species consisting of exons originating not only from the CYP2C8 and CYP2C18 genes, but also from the CYP2C19 gene were detected. In all cases the exons from the different CYP2C genes were joined at the correct canonical splice sites. However, the closely linked RBP4 gene is not participating in intergenic splicing with the CYP2C genes. In addition, CYP2C8 gene expression was found to generate a variety of scrambled RNA molecules including species that contained repetitions of certain exons.[1]References
- The human CYP2C locus: a prototype for intergenic and exon repetition splicing events. Finta, C., Zaphiropoulos, P.G. Genomics (2000)
