Date published: 2026-5-7

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cathepsin W Inhibitors

Cathepsin W inhibitors belong to a specific chemical class designed to modulate the activity of cathepsin W, an enzyme classified as a member of the cysteine protease family. Cathepsins are implicated in various physiological processes, primarily involved in protein degradation within lysosomes. Among them, cathepsin W stands out as a distinctive member due to its tissue-specific expression and unique substrate specificity. This enzyme is predominantly found in immune cells, including natural killer cells and cytotoxic T lymphocytes, suggesting a role in immune system function. The design and development of cathepsin W inhibitors are rooted in the recognition of its involvement in immune responses and cellular homeostasis. The inhibitors of cathepsin W are meticulously crafted molecules that specifically target and bind to the active site of the enzyme, hindering its proteolytic activity. Structurally, these inhibitors often feature a scaffold designed to mimic the natural substrates of cathepsin W, ensuring a high degree of specificity in their interaction. This targeted inhibition is crucial for minimizing off-target effects and enhancing the selectivity of these compounds. Researchers and medicinal chemists engage in a comprehensive process of structure-activity relationship studies to optimize the potency and pharmacokinetic properties of cathepsin W inhibitors. By modulating the activity of cathepsin W, these inhibitors contribute to the elucidation of the enzyme's physiological functions and pave the way for potential applications in various research areas related to cellular and immunological processes.
Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

E-64

66701-25-5sc-201276
sc-201276A
sc-201276B
5 mg
25 mg
250 mg
$281.00
$947.00
$1574.00
14
(0)

Irreversible epoxide inhibitor that can inhibit cysteine proteases including cathepsins.

Z-FA-FMK

197855-65-5sc-201303
sc-201303A
1 mg
5 mg
$128.00
$372.00
19
(1)

Fluoromethyl ketone-based inhibitor, can inhibit cysteine proteases including cathepsins.

K777

233277-99-1sc-507382
10 mg
$566.00
(0)

Reversible peptidyl diazomethyl ketone, known to inhibit various cathepsins.

Divinyl sulfone

77-77-0sc-255120
sc-255120A
10 g
50 g
$119.00
$271.00
(0)

Irreversible inhibitor, can modify the active site of cysteine proteases.

Leupeptin hemisulfate

103476-89-7sc-295358
sc-295358A
sc-295358D
sc-295358E
sc-295358B
sc-295358C
5 mg
25 mg
50 mg
100 mg
500 mg
10 mg
$73.00
$148.00
$316.00
$499.00
$1427.00
$101.00
19
(3)

A peptide aldehyde that can inhibit cysteine, serine, and threonine proteases.

MDL-28170

88191-84-8sc-201301
sc-201301A
sc-201301B
sc-201301C
10 mg
50 mg
100 mg
500 mg
$69.00
$241.00
$447.00
$2195.00
20
(2)

A broad-spectrum cysteine protease inhibitor, could affect cathepsin W activity.

VX-765

273404-37-8sc-475845
sc-475845A
sc-475845B
5 mg
10 mg
50 mg
$228.00
$302.00
$968.00
1
(0)

Originally a caspase-1 inhibitor, could alter protease activity through indirect pathways.