Cloning and expression of the gene encoding a novel proteinase from Tritirachium album Limber

  • Samal B
  • Karan B
  • Boone T
 et al. 
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Abstract

We have isolated the genomic and cDNA clones encoding a novel proteinase from the fungus Tritirachium album Limber, named proteinase T, synthesis of which is induced in skim milk medium. The coding sequence for this enzyme is interrupted by two introns in the fungal genome. The amino acid sequence of proteinase T as deduced from the nucleotide sequence is about 53 % identical to that of proteinase K. Four cysteines are present in the mature proteinase, probably in the form of two disulfide bonds, which might explain the thermal stability of the proteinase. We have expressed the proT cDNA in Escherichia coli. The authenticity of the product has been characterized by Western blotting and N-terminal analysis of the recombinant product. © 1989.

Author-supplied keywords

  • Subtilisin-like fungal proteinase T
  • cDNA
  • expression in Escherichia coli
  • genomic clone
  • induction
  • introns
  • recombinant DNA

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Authors

  • Babru B. Samal

  • Barbara Karan

  • Thomas C. Boone

  • Kenneth K. Chen

  • Michael F. Rohde

  • Yitzhak Stabinsky

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