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Intrachromosomal gene mapping in man: The gene for tryptophanyl-tRNA synthetase maps in region q21→qter of chromosome 14

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Somatic Cell Genetics

Abstract

A gene for tryptophanyl-tRNA synthetase (EC 6.1.1.2), the enzyme which attaches tryptophan to its tRNA, has previously been assigned to human chromosome 14 by analysis of man-mouse somatic cell hybrids. We report here a method for the electrophoretic separation of Chinese hamster and human tryptophanyl-tRNA synthetases and its application to a series of independently derived Chinese hamster-human hybrids in which part of the human chromosome 14 has been translocated to the human X chromosome. When this derivative der (X),t(X;14) (Xqter → Xp22::14q21 → 14qter) chromosome carrying the human gene for hypoxanthine-guanine phosphoribosyltransferase was selected for and against in cell hybrid lines by the appropriate selective conditions, the human tryptophanyl-tRNA synthetase activity was found to segregate concordantly. These results provide additional confirmation for the assignment of the tryptophanyl-tRNA synthetase gene to human chromosome 14 and define its intrachromosomal location in the region 14q21 → 14qter. Our findings indicate that the genes for tryptophanyl-tRNA synthetase and for ribosomal RNA are not closely linked on chromosome 14.

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Authors and Affiliations

  1. Department of Pediatrics M-009, School of Medicine, University of California San Diego, 92093, La Jolla, California

    Uta Francke

  2. Department of Biology, Yale University, Kline Biology Tower, 06520, New Haven, Connecticut

    Richard M. Denney & Frank H. Ruddle

Authors
  1. Uta Francke
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  2. Richard M. Denney
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  3. Frank H. Ruddle
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Francke, U., Denney, R.M. & Ruddle, F.H. Intrachromosomal gene mapping in man: The gene for tryptophanyl-tRNA synthetase maps in region q21→qter of chromosome 14. Somat Cell Mol Genet 3, 381–389 (1977). https://doi.org/10.1007/BF01542967

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  • DOI: https://doi.org/10.1007/BF01542967

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