Definition of proteolysis in English:

Share this entry


Pronunciation: /ˌprōdēˈäləsəs/


The breakdown of proteins or peptides into amino acids by the action of enzymes.
Example sentences
  • As a cheese ages, fats and proteins break down through proteolysis, into simplified units via bacterial or fungal actions.
  • A protein resistant to heat and proteolysis that inhibits serine proteases was isolated from wheat leaf apoplasts.
  • Chapter 5 focuses on the catabolism of proteoglycans, detailing mainly proteolysis and the host of proteases involved.



Pronunciation: /ˌprōdēəˈlidik/
Example sentences
  • Most notably, there are the proteolytic enzymes trypsin and chymotrypsin, which our bodies make.
  • The biochemical degradation of proteins through hydrolysis of peptide bonds is caused by the action of proteolytic enzymes or proteases.
  • Fibrinogen and its proteolytic cleavage product, fibrin, are critical plasma proteins with multiple functions in blood clotting.


Pronunciation: /-əˈlitik(ə)lē/
Example sentences
  • All 3 proteins are proteolytically regulated by sterols.
  • The proteolytically modified actins were used within 1 day.
  • We therefore developed proteogest, a program that generates basic descriptive statistics for both the intact and proteolytically processed proteome.


Late 19th century: modern Latin, from protein + -lysis.

For editors and proofreaders

Syllabification: pro·te·ol·y·sis

Share this entry

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.