title: Isolation of the beta-tubulin gene from yeast and demonstration of its essential function in vivo.
abstract: A DNA fragment from yeast (Saccharomyces cerevisiae) was identified by its homology to a chicken beta-tubulin cDNA and cloned. The fragment was shown to be unique in the yeast genome and to contain the gene for yeast beta-tubulin, since it can complement a benomyl-resistant conditional-lethal mutation. A smaller subfragment, when used to direct integration of a plasmid to the benomyl resistance locus in a diploid cell, disrupted one of the beta-tubulin genes and concomitantly created a recessive lethal mutation, indicating that the single beta-tubulin gene of yeast has an essential function. Determination of the nucleotide sequence reveals extensive amino acid sequence homology (more than 70%) between yeast and chicken brain beta-tubulins.
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D002645:Chickens / Q000235:genetics; D004271:DNA, Fungal / Q000235:genetics; D005796:Genes; D005804:Genes, Lethal; D009154:Mutation; D012441:Saccharomyces cerevisiae / Q000235:genetics; D014404:Tubulin / Q000235:genetics*
chemical_list: D004271:DNA, Fungal; D014404:Tubulin