A High-Resolution PAC and BAC Map of the SCA2 Region |
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| Authors: | Tamilla Nechiporuk Alex Nechiporuk Soodabeh Sahba Karla Figueroa Hiroki Shibata Xiao-Ning Chen Julie R. Korenberg Pieter de Jong Stefan-M. Pulst |
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| Affiliation: | aRose Moss Laboratory for Parkinson's and Neurodegenerative Diseases, CSMC Burns and Allen Research Institute, Division of Neurology, Cedars–Sinai Medical Center, University of California at Los Angeles School of Medicine, Los Angeles, California, 90048;cDepartment of Human Genetics, Roswell Park Cancer Institute, Buffalo, New York, 14263-0001;bDivision of Medical Genetics, Cedars-Sinai Medical Center, University of California at Los Angeles School of Medicine, Los Angeles, California, 90048 |
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| Abstract: | The spinocerebellar ataxia type 2 (SCA2) gene has been localized to chromosome 12q24.1. To characterize this region and to aid in the identification of the SCA2 gene, we have constructed a 3.9-Mb physical map, which covers markers D12S1328 and D12S1329 known to flank the gene. The map comprises a contig of 84 overlapping yeast artificial chromosomes (YACs), P1 artificial chromosomes (PACs), and bacterial artificial chromosomes (BACs) onto which we placed 82 PCR markers. We localized eight genes and expressed sequence tags on this map, many of which had not been precisely mapped before. In contrast to YACs, which showed a high degree of chimerism and deletions in this region, PACs and BACs were stable. Only 1 in 65 PACs contained a small deletion, and 2 in 18 BACs were chimeric. The high-resolution physical map, which was used in the identification of the SCA2 gene, will be useful for the positional cloning of other disease genes mapped to this region. |
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