DEVELOPMENT OF 124 SEQUENCE-TAGGED SITES AND CYTOGENETIC LOCALIZATIONOF 217 COSMIDS FOR HUMAN-CHROMOSOME-10

A total of 124 new chromosome 10-specific sequence-tagged sites (STSs) were derived from two sources: (1) DNA sequences obtained from anonym ous clones in new libraries enriched for human chromosome 10 inserts, and (2) published sequences of genes and other loci already known to m ap to chromosome 10, Libraries were constructed from a somatic cell hy brid carrying human chromosomes 10 and Y. A cosmid library was made fr om total DNA of the hybrid and probed with labeled total human DNA to identify clones with human DNA inserts. Two hundred seventeen cosmids were mapped to regions of human chromosome 10 by fluorescence in situ hybridization. Twenty-five cosmids represent probes that have been pla ced on the genetic map previously. One hundred ninety-two cosmids repr esent new probes that have not been mapped previously. Cosmids carryin g inserts with CA repeats were identified by hybridization with a labe led poly(dC-dA)-poly(dG-dT) probe and subcloned to yield microsatellit e STS markers. Two small insert plasmid libraries were made, the first by subcloning inserts from a chromosome 10-enriched lambda phage libr ary (LL10NS01) and the second by cloning Alu element-mediated PCR prod ucts amplified from hybrid DNA. STSs were generated from the DNA seque nces of clone inserts. Chromosome 10-specific STSs were distinguished from Y chromosome STSs by one or both of the following criteria: (1) s uccessful PCR amplification from a template consisting of DNA from ano ther chromosome 10-containing cell line, NA10926B, or (2) FISH localiz ation to chromosome 10 of the source cosmid or of YACs isolated by PCR screening with the STS. These libraries were the source of 90 new chr omosome 10-specific STSs, 42 of which contain CA repeats. (C) 1994 Aca demic Press, Inc.