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Long QT syndrome (LQTS) is a potentially lethal, highly treatable cardiac channelopathy for which genetic testing has matured from discovery to translation and now clinical implementation.Here we examine the spectrum and prevalence of mutations found in the first 2,500 unrelated cases referred for the FAMILION ® LQTS clinical genetic test.Retrospective analysis of the first 2,500 cases (1,515...
Genetic testing for congenital long QT syndrome (LQTS) has been performed in research laboratories for the past decade. Approximately 75% of patients with high clinical probability for LQTS have a mutation in one of five LQTS-causing cardiac channel genes. Possible explanations for the remaining genotype-negative cases include LQTS mimickers, novel LQTS-causing genes, unexplored regions of the known...
We have developed a method to clone genomic DNA selectively into a yeast–bacterial shuttle vector, pClasper, by recombinogenic targeting in yeast. A gene-specific pClasper targeting vector was constructed with small recombinogenic ends (500 bp) derived from flanking sequences of the genomic region to be cloned. Linearized, recombinogenic pClasper targeting vector and native genomic DNA were cotransformed...
We have developed a method to capture inserts from P1 and P1 artificial chromosome (PAC) clones into a yeast–bacteria shuttle vector by using recombinogenic targeting. We have engineered a vector, pPAC-ResQ, a derivative of pClasper, which was previously used to capture inserts from yeast artificial chromosome clones. pPAC-ResQ contains DNA fragments flanking the inserts in P1 and PAC vectors as recombinogenic...
Currently, recombinational cloning procedures based upon methods developed for yeast, Saccharomyces cerevisiae, are being exploited for targeted cloning and in-vivo modification of genomic clones. In this review, we will discuss the development of large-insert vectors, homologous recombination-based techniques for cloning and modification, and their application towards functional analysis of genes...
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