Cloning, characterization, and sequence of the yeast DNA topoisomerase I gene.

@article{Thrash1985CloningCA,
  title={Cloning, characterization, and sequence of the yeast DNA topoisomerase I gene.},
  author={C Thrash and A. T. Bankier and Barclay G. Barrell and Rolf Sternglanz},
  journal={Proceedings of the National Academy of Sciences of the United States of America},
  year={1985},
  volume={82 13},
  pages={4374-8}
}
The structural gene for yeast DNA topoisomerase I (TOP1) has been cloned from two yeast genomic plasmid banks. Integration of a plasmid carrying the gene into the chromosome and subsequent genetic mapping shows that TOP1 is identical to the gene previously called MAK1. Seven top1 (mak1) mutants including gene disruptions are viable, demonstrating that DNA topoisomerase I is not essential for viability in yeast. A 3787-base-pair DNA fragment including the gene has been sequenced. The protein… CONTINUE READING

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