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Assignment of the human poly(A) polymerase (PAP) gene to chromosome 14q32.1-q32.2 and isolation of a polymorphic CA
T Yamauchi1, J Sugimoto, T Hatakeyama
1Department of Materials and Biosystem Engineering, Faculty of Engineering, Toyama University, Japan.
Abstract:
We report the chromosomal localization of the gene for human poly(A) polymerase (PAP) and the characterization of a newly isolated CA repeat near the PAP locus. By fluorescence in situ hybridization and polymerase chain reaction (PCR)-based analysis with both a human/rodent monochromosomal hybrid cell panel and a radiation hybrid mapping panel, this gene was mapped on the q32.1-q32.2 region of chromosome 14. From a genomic clone containing the human PAP locus, we have isolated a polymorphic dinucleotide (CA) sequence. High heterozygosity (0.81) makes this polymorphism a useful marker in the genetic study of disorders localized at the 14q32 region, such as autosomal recessive congenital microphthalmia (CMIC).