Target intelligence / Profile preview

Cathepsin L

Molecular classification: Enzyme, Protease, Cysteine protease, Lysosomal protease, Peptidase C1 family, Papain-like family

Overview

Cathepsin L is a lysosomal cysteine protease involved in intracellular protein degradation, antigen processing, and extracellular matrix remodeling. It plays roles in various diseases including cancer, inflammation, and viral infections, making it a potential therapeutic target. However, its broad substrate specificity and involvement in essential cellular processes pose significant safety concerns.

Mechanism of action

Inhibition of cysteine protease activity, prevention of substrate cleavage

Biological functions

Intracellular protein degradationAntigen processingBone resorptionRegulation of cell growthApoptosisExtracellular matrix degradation

Disease associations

CancerMyofibril necrosisMyocardial ischemiaRenal diseaseInflammationViral infection

Safety considerations

Potential for off-target effects due to broad substrate specificityDisruption of normal protein turnover and cellular homeostasisComplicated role in tumor progression (both promoting and suppressing effects reported)Potential for immune-related adverse events

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