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Related Experiment Videos

Protein processing within the secretory pathway.

A Rehemtulla1, R J Kaufman

  • 1Genetics Institute, Cambridge, Massachusetts.

Current Opinion in Biotechnology
|October 1, 1992
PubMed
Summary

Proteolytic enzymes like PACE (furin) and related serine proteases cleave protein precursors at specific sites. This process is crucial for generating bioactive peptides, hormones, and factors involved in various biological functions.

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Enzymology

Background:

  • Endoproteolytic cleavage is essential for generating bioactive polypeptides from precursors.
  • This processing occurs at specific dibasic amino acid residues like Lys-Arg or Arg-Arg.

Purpose of the Study:

  • To investigate the enzymes responsible for endoproteolytic cleavage of hormone and neuropeptide precursors.
  • To characterize a newly discovered family of serine proteases involved in protein processing.

Main Methods:

  • Functional and structural characterization of newly identified serine proteases.
  • Analysis of endoproteolytic cleavage sites in protein precursors.

Main Results:

  • Identified a family of serine proteases related to bacterial subtilisins.
  • Demonstrated that these enzymes, including PACE (furin), PC1/PC3, PC2, and PACE4, cleave precursors at dibasic residues.
  • Established the functional and structural characteristics of these processing enzymes.

Conclusions:

  • A novel family of serine proteases, including PACE (furin), PC1/PC3, PC2, and PACE4, are key enzymes for generating bioactive polypeptides.
  • These enzymes play a critical role in the processing of hormones, neuropeptides, coagulation factors, and viral glycoproteins.

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