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Related Experiment Videos

Human ADAM33: protein maturation and localization.

Charles G Garlisi1, Jun Zou, Kristine E Devito

  • 1Allergy, Schering-Plough Research Institute, 2015 Galloping Hill Road, Kenilworth, NJ 07033, USA. charles.garlisi@spcorp.com

Biochemical and Biophysical Research Communications
|January 22, 2003
PubMed
Summary

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ADAM33, a novel asthma gene, is expressed and processed in cells. Its catalytic activity is confirmed, and it is found in lung tissues, suggesting a role in asthma.

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Immunology

Background:

  • ADAM33 (a disintegrin and metalloprotease) is identified as a novel asthma susceptibility gene.
  • Understanding ADAM33 expression and processing is crucial for elucidating its role in asthma pathophysiology.

Purpose of the Study:

  • To investigate the expression, processing, and enzymatic activity of ADAM33.
  • To determine the cellular localization and potential role of ADAM33 in asthma.

Main Methods:

  • Domain-specific antibodies were utilized to study ADAM33 expression and processing.
  • Stable and transient transfections were performed to analyze protein forms and mutations.
  • Catalytic activity was assessed using an alpha(2)-macroglobulin complex formation assay.
  • Cellular localization was determined through immunodetection techniques.

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Main Results:

  • ADAM33 pro-domain is cleaved at a putative furin site, and the catalytic domain exhibits enzymatic activity.
  • Mutation of the catalytic site (E346A) abolished activity, while it did not significantly affect protein processing.
  • Alternate glycosylation was observed within the catalytic domain.
  • ADAM33 was detected on the cell surface and intracellularly, with endogenous protein found in bronchus tissue and specific cell types.

Conclusions:

  • ADAM33 undergoes specific processing and possesses catalytic activity relevant to its function.
  • The localization and presence of ADAM33 in lung tissues support its involvement in asthma.
  • Further research into ADAM33's role in asthma pathophysiology is warranted.