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논문 기본 정보

자료유형
학술저널
저자정보
저널정보
한국미생물학회 미생물학회지 미생물학회지 24권 2호
발행연도
수록면
119 - 126 (8page)

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초록· 키워드

A periplasmic endoprotease, named protease Pi, was purified to homogeneity from Escherichia coli by conventional procedure with insulin as substrate. This enzyme degrades insulin and glucagon to trichloroacetic acid-soluble materials, but shows little or no hydrolysis of bovine serum albumin, casein or globin. Its molecular weight was 110,000 when determined by gel filtration on Sephacryl S-300 and was 105,000 when estimated by polyacrylamide gel electrophoresis in the presence of sodium dodecyl sulfate. Thus, it appears to be single polypeptide. This enzyme is metalloprotease, since it is completely inhibited by o-phenanthroline and can be activated by addition of divalent metal cations, such as Mg²⁺ and Co²⁺. It is distinct from protease Ci, a cytoplasmic insulin degrading enzyme, since protease Pi is localized to the periplasm. Since protease Pi selectively degrades GTP cyclohydrolase I, it appears to play a role in the regulation of pteridine biosynthesis.
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목차

  1. Abstract
  2. 재료 및 방법
  3. 결과
  4. 고찰
  5. 요약
  6. REFERENCES

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UCI(KEPA) : I410-ECN-0101-2014-475-000547248