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Partial purification and identification of hormone-sensitive lipase from chicken adipose tissue

På svenska

Author

Summary, in English

HSL from chicken adipose tissue exhibits remarkable activation upon phosphorylation with cAMP-dependent protein kinase (cAMP-PK) compared to HSL from rat and human adipose tissue. In order to characterize the chicken HSL enzyme, it was purified 3500 fold from a chicken adipose tissue homogenate using pH 5.2 precipitation and anion-exchange chromatography. The purified chicken HSL was identified as an 86 kDa protein using Western blot analysis. The HSL diacylglycerol lipase activity was inhibited by 98% upon incubation with anti-rat HSL antiserum, and the specific activity of chicken HSL was estimated to be approximately the same as for the rat enzyme. Furthermore, the 86 kDa polypeptide was phosphorylated by cAMP-PK to about the same stoichiometry as for the recombinant rat enzyme. Hence, our results demonstrate that HSL from chicken adipose tissue is comparable in size and specific activity to HSL from mammalian species, and not a smaller 42 kDa polypeptide with 1000-fold lower specific activity as previously reported.

Publishing year

1997

Language

English

Pages

94-99

Publication/Series

Biochemical and Biophysical Research Communications

Volume

236

Issue

1

Document type

Journal article

Publisher

Elsevier

Topic

  • Biological Sciences

Status

Published

Research group

  • Insulin Signal Transduction
  • Molecular Endocrinology

ISBN/ISSN/Other

  • ISSN: 1090-2104