Homologous recombination of a flanking repeat gene cluster is a mechanism for a common contiguous gene deletion syndrome |
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Authors: | KS Chen P Manian T Koeuth L Potocki Q Zhao AC Chinault CC Lee JR Lupski |
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Affiliation: | Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas 77030, USA. |
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Abstract: | Smith-Magenis syndrome (SMS), caused by del(17)p11.2, represents one of the most frequently observed human microdeletion syndromes. We have identified three copies of a low-copy-number repeat (SMS-REPs) located within and flanking the SMS common deletion region and show that SMS-REP represents a repeated gene cluster. We have isolated a corresponding cDNA clone that identifies a novel junction fragment from 29 unrelated SMS patients and a different-sized junction fragment from a patient with dup(17)p11.2. Our results suggest that homologous recombination of a flanking repeat gene cluster is a mechanism for this common microdeletion syndrome. |
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