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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Electrophoretic karyotype of the amylolytic yeast Lipomyces starkeyi and cloning, sequencing and chromosomal localization of its TRP1 gene.

The genome of the amylolytic yeast strain Lipomyces starkeyi NCYC 1436 was analysed using contour-clamped homogeneous electric field gel electrophoresis (CHEF). The banding pattern under a variety of running conditions indicating the presence of 11 different chromosome-sized DNA molecules. The sizes of these chromosome bands were determined by comparison with chromosomes from standard strains of Schizosaccharomyces pombe and Saccharomyces cerevisiae. The chromosomal bands were estimated to be within the range 0.7-2.8 Mb, with the genome (excluding mitochondrial DNA) estimated at 15 Mb. The molecular cloning of the TRP1 gene, isolated from a genomic library of this strain, is also reported: the gene was present on a 6.5-kb Sau3A DNA fragment, and complemented the trpC gene of E. coli. The DNA sequence was determined (EMBL accession No. Z68292) and compared to other tryptophan biosynthetic genes encoding N-(5'-phosphoribosyl) anthranilate isomerase (PRAI) activity. The gene was also used as a probe in hybridization studies, and by this means, its chromosomal location was identified.[1]

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