Date published: 2026-2-5

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cathepsin A Inhibitors

The chemical class of Cathepsin A inhibitors comprises a diverse group of compounds, primarily targeting cysteine proteases. These inhibitors vary in their specificity and mode of action. Some, like E-64 and Z-Phe-Phe-DMK, are selective towards cysteine proteases and bind covalently to the active site, leading to irreversible inhibition. Others, such as Leupeptin, exhibit broader specificity, inhibiting both serine and cysteine proteases. The primary mechanism of these inhibitors involves the formation of a stable complex with the protease, thereby preventing it from interacting with its substrates. This interaction can be either competitive, as seen with Cystatin, or non-competitive, as observed in the case of irreversible inhibitors like E-64. Some of these inhibitors, while not directly targeting Cathepsin A, can influence its activity by modulating related pathways. For example, Pepstatin A, an aspartic protease inhibitor, and Nitroxoline, an antibiotic with metalloprotease inhibitory activity, can indirectly affect Cathepsin A by altering the proteolytic environment within the cell. Similarly, Calpeptin, primarily a calpain inhibitor, can indirectly impact Cathepsin A's function due to the interconnected nature of proteolytic pathways.

Items 1 to 10 of 14 total

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Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

Lactacystin

133343-34-7sc-3575
sc-3575A
200 µg
1 mg
$188.00
$575.00
60
(2)

Lactacystin is a potent inhibitor of cathepsin A, exhibiting selective binding to the enzyme's active site. This interaction disrupts the proteolytic activity by stabilizing the enzyme-substrate complex, thereby altering the kinetics of substrate turnover. The compound's unique structural features allow it to modulate the enzyme's conformation, impacting its catalytic efficiency. Additionally, Lactacystin's ability to form transient covalent bonds enhances its specificity, making it a critical tool in studying proteolytic pathways.

Chymostatin

9076-44-2sc-202541
sc-202541A
sc-202541B
sc-202541C
sc-202541D
5 mg
10 mg
25 mg
50 mg
100 mg
$156.00
$260.00
$640.00
$1186.00
$2270.00
3
(1)

Chymostatin is a selective inhibitor of cathepsin A, characterized by its ability to interact with the enzyme through non-covalent interactions that stabilize the enzyme-substrate complex. This stabilization leads to a significant reduction in proteolytic activity, effectively altering the reaction kinetics. Its unique molecular structure allows for specific binding, influencing the enzyme's conformational dynamics and catalytic properties, thereby providing insights into proteolytic mechanisms.

E-64

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

E-64 is a potent, irreversible inhibitor of cysteine proteases, which can inhibit Cathepsin A activity.

Antipain, Dihydrochloride

37682-72-7sc-291907
sc-291907A
5 mg
25 mg
$63.00
$214.00
2
(1)

Antipain, Dihydrochloride, acts as a potent inhibitor of cathepsin A, exhibiting unique binding characteristics that disrupt the enzyme's active site. Its structural conformation facilitates specific interactions with key amino acid residues, modulating the enzyme's catalytic efficiency. This compound influences the dynamics of substrate recognition and processing, providing a distinct pathway for understanding proteolytic regulation and enzyme inhibition mechanisms.

clasto-Lactacystin β-Lactone

154226-60-5sc-202105
100 µg
$225.00
3
(1)

Clasto-Lactacystin β-Lactone functions as a selective inhibitor of cathepsin A, characterized by its ability to form covalent bonds with the enzyme's active site. This interaction alters the enzyme's conformation, impacting substrate affinity and turnover rates. The compound's unique lactone structure enhances its reactivity, allowing for specific modulation of proteolytic activity. Its kinetic profile reveals a distinct mechanism of action, contributing to insights into enzyme regulation and protease activity.

clasto-Lactacystin β-lactone

155975-72-7sc-202106
100 µg
$254.00
1
(1)

Clasto-Lactacystin β-lactone exhibits a remarkable ability to selectively target cathepsin A through a unique mechanism of covalent modification. Its lactone ring facilitates nucleophilic attack, leading to the formation of stable enzyme adducts. This interaction not only disrupts the enzyme's catalytic function but also influences its stability and folding dynamics. The compound's specificity and reactivity provide valuable insights into the intricate regulatory networks governing proteolytic processes.

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)

Leupeptin inhibits serine and cysteine proteases, including Cathepsin A, by forming a stable complex.

Calpeptin

117591-20-5sc-202516
sc-202516A
10 mg
50 mg
$121.00
$456.00
28
(1)

Calpeptin is a calpain inhibitor that can indirectly influence Cathepsin A activity.

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)

MDL 28170 is a broad-spectrum cysteine protease inhibitor, potentially reducing Cathepsin A activity.

CA-074

134448-10-5sc-202513
1 mg
$321.00
(0)

CA-074 selectively inhibits Cathepsin B, but can also reduce Cathepsin A activity indirectly.