secretase
Noun: A type of enzyme that cleaves (cuts) specific transmembrane proteins. Its primary known function in medical research is to cut amyloid precursor protein (APP), producing fragments including amyloid-beta peptides. These peptides can aggregate into plaques in brain tissue, a pathological hallmark of Alzheimer's disease.
"Secretase" is a technical term used primarily in biochemistry, neuroscience, and medicine. It refers to the enzymatic activity responsible for proteolytic cleavage. It is often modified by a Greek letter prefix (e.g., β-secretase, γ-secretase) to specify which cleavage step or enzyme complex is being discussed.
Examples: * Researchers are developing drugs that inhibit secretase to potentially slow Alzheimer's progression. * The study focused on the role of γ-secretase in the Notch signaling pathway. * Beta-secretase activity is a key target for therapeutic intervention.
- "Secretase inhibitor": A compound or drug designed to block the activity of a secretase enzyme.
- The clinical trial tested a γ-secretase inhibitor for treating Alzheimer's disease.
- The term is often used in the context of "proteolytic processing" or "regulated intramembrane proteolysis (RIP)".
- β-secretase (BACE1): An enzyme that performs the first cut on APP.
- γ-secretase: A multi-protein complex enzyme that performs the final cut on APP, releasing amyloid-beta peptides.
- α-secretase: An enzyme that cuts APP within the amyloid-beta sequence, preventing the formation of the problematic peptides.
- Presenilin: The catalytic core component of the γ-secretase complex.
- Protease (in this specific context)
- Cleaving enzyme
- Processing enzyme
- Secretase complex: Refers to the assembly of proteins, particularly relevant for γ-secretase.
- Secretase activity: The measurable function of the enzyme in cutting its substrate.
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a set of enzymes believed to snip pieces off a longer protein producing fragments of amyloid protein that bunch up and create amyloid protein plaques in brain tissue (the pathological hallmark of Alzheimer's)
