2. Signaling Pathways
  3. Metabolic Enzyme/Protease
  4. Cathepsin

Cathepsin

Cathepsin

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Cathepsins are protease enzymes, categorized into multiple families. Cathepsins can be serine protease, cysteine protease, or aspartyl protease. There are about 15 classes of cathepsins in humans (Cathepsin A, B, C, D, E, F, G, H, K, L, O, S, V, W, and Z). Cathepsins are active in the low pH milieu of lysosomes and are versatile in their functions. Like other enzymes, they are vital for the normal physiological functions such as digestion, blood coagulation, bone resorption, ion channel activity, innate immunity, complement activation, apoptosis, vesicular trafficking, autophagy, angiogenesis, proliferation, and metastasis, among scores of others.

Numerous pathologies have been attributed to the dysregulated cathepsins, some of which include arthritis, periodontitis, pancreatitis, macular degeneration, muscular dystrophy, atherosclerosis, obesity, stroke, Alzheimer's disease, schizophrenia, tuberculosis, and Ebola.

Cathepsin Isoform Specific Products:

Cathepsin Isoform Comparison
Cat. No. Product Name Effect Purity Chemical Structure
  • HY-50887
    L-873724
    		Inhibitor 98.93%
    L-873724 is a potent, orally bioavailable, selective and reversible non-basic cathepsin K inhibitor, with IC50s of 0.2, 178, 264, and 5239 nM for cathepsin K, cathepsin S, cathepsin L, cathepsin B, respectively. L-873724 also exhibits an IC50 of 0.5 nM for rabbit cathepsin K. L-873724 inhibits bone resorption.
    L-873724
  • HY-129116
    SSAA09E1
    		Inhibitor 99.54%
    SSAA09E1 is a cathepsin L blocker (IC50: 5.33 μM).SSAA09E1 inhibits stages of viral entry. SSAA09E1 can be used for SARS-CoV infection research
    SSAA09E1
  • HY-P4306
    Z-Phe-Phe-Diazomethylketone
    		Inhibitor 98%
    Z-Phe-Phe-Diazomethylketone is a selective inhibitor of cathepsin L.
    Z-Phe-Phe-Diazomethylketone
  • HY-P4787A
    Ac-Glu-Asp(EDANS)-Lys-Pro-Ile-Leu-Phe-Phe-Arg-Leu-Gly-Lys(DABCYL)-Glu-NH2 acetate
    		Substrate 99.44%
    Ac-Glu-Asp(EDANS)-Lys-Pro-Ile-Leu-Phe-Phe-Arg-Leu-Gly-Lys(DABCYL)-Glu-NH2 acetate is a Cathepsin D substrate, that can be used for cathepsin D FRET assay.
    Ac-Glu-Asp(EDANS)-Lys-Pro-Ile-Leu-Phe-Phe-Arg-Leu-Gly-Lys(DABCYL)-Glu-NH2 acetate
  • HY-170772
    Dual Cathepsin L/JAK-IN-1
    		Inhibitor 98.47%
    Dual Cathepsin L/JAK-IN-1 (Compound A8) is a dual inhibitor of Cathepsin L (CTSL) and JAK, with IC50 values of 0.68 μM, 337.1 nM, 5.251 nM, 27.29 nM, and 172.6 nM for CTSL, JAK1/2/3, and TYK2, respectively. Dual Cathepsin L/JAK-IN-1 effectively blocks the activation of the MAPK, NF-κB, and JAK/STAT signaling pathways, leading to significant anti-inflammatory therapeutic effects. Dual Cathepsin L/JAK-IN-1 can be used in research on acute lung injury (ALI).
    Dual Cathepsin L/JAK-IN-1
  • HY-118959A
    S2160 hydrochloride
    		Substrate
    S2160 hydrochloride is a substrate of Cathepsin B that can be utilized in the calorimetric assay for the measurement of cathepsin B.
    S2160 hydrochloride
  • HY-147774
    Cathepsin K inhibitor 6
    		Inhibitor 98.18%
    Cathepsin K inhibitor 6 (compound 19) is an inhibitor of cathepsin K (Cat K) with an IC50 of 17 nM. Cathepsin K inhibitor 6 also has inhibitory effects on other isoforms, with IC50s of 0.05 μM (Cat L) and 0.3 μM (Cat B), respectively.
    Cathepsin K inhibitor 6
  • HY-169171
    Cathepsin L-IN-5
    		Inhibitor
    Cathepsin L-IN-5 (D6-3) is a potent Cathepsin L (CatL) inhibitor with an IC50 of 0.27 nM. Cathepsin L-IN-5 effectively blocks the CatL function and substantially hinders the entry of the SARS-CoV-2 pseudovirus to cells by inhibiting the cleavage of the spike protein. Cathepsin L-IN-5 can be utilized in SARS-CoV-2 research.
    Cathepsin L-IN-5
  • HY-W596474I
    Poly-L-glutamic acid sodium salt (MW 120000)
    		Substrate
    Poly-L-glutamic acid sodium salt (MW 120000) is a synthetic polypeptide with biocompatibility, biodegradability and non-immunogenicity. Poly-L-glutamic acid sodium salt is an ideal tumor-targeting polymer carrier. Poly-L-glutamic acid sodium salt can be hydrolyzed by cathepsin B during metabolic decomposition.
    Poly-L-glutamic acid sodium salt (MW 120000)
  • HY-158307
    Z-Arg-Arg-βNA acetate
    		99.77%
    Z-Arg-Arg-βNA acetate is a sensitive dipeptide substrate of the protease Cathepsin B and resistant to proteases H and L. Z-Arg-Arg-βNA acetate can serve as an important tool for distinguishing non-Cathepsin B type proteins.
    Z-Arg-Arg-βNA acetate
  • HY-RS03340
    CTSL Human Pre-designed siRNA Set A
    		Inhibitor

    CTSL Human Pre-designed siRNA Set A contains three designed siRNAs for CTSL gene (Human), as well as a negative control, a positive control, and a FAM-labeled negative control.
    CTSL Human Pre-designed siRNA Set A
  • HY-129578R
    Asperphenamate (Standard)
    		Inhibitor
    Asperphenamate (Standard) is the analytical standard of Asperphenamate. This product is intended for research and analytical applications. Asperphenamate, a fungal metabolite of Aspergillus flatiipes with anti-cancer effect, exhibits IC50 values of 92.3 μM, 96.5 μM and 97.9 μM in T47D, MDA-MB-231 and HL-60 cells, respectively[1][2].
    Asperphenamate (Standard)
  • HY-18234
    Leupeptin
    		Inhibitor
    Leupeptin is a broad-spectrum, membrane-permeable protease inhibitor. Leupeptin potently inhibits serine, cysteine and threonine proteases. Leupeptin inhibits Mpro (the main protease of SARS-CoV-2) and also has anti-inflammatory activity.
    Leupeptin
  • HY-P0109
    (S,S)-Z-FA-FMK
    		Inhibitor
    (S,S)-Z-FA-FMK is a cell-permeable, irreversible cathepsin B inhibitor. (S,S)-Z-FA-FMK blocks LPS-induced production of IL-1α and IL-1β. (S,S)-Z-FA-FMK can be used as a negative control for caspase-1 and caspase-2 inhibitors because it lacks an aspartic acid residue at the P1 position.
    (S,S)-Z-FA-FMK
  • HY-P2498
    Cathepsin D and E FRET Substrate
    Cathepsin D and E FRET Substrate is a fluorogenic substrate for cathepsins D and E and not for B, H or L. The cleavage occurs at the Phe-Phe amide bond resul. Cathepsin D and E FRET Substrate is a valuable tool for routine assays and for mechanistic studies on cathepsins E and D.
    Cathepsin D and E FRET Substrate
  • HY-161721
    Cathepsin Inhibitor 4
    		Inhibitor
    Cathepsin Inhibitor 4 (Compound 45) is a selective inhibitor for Cathepsin S with Ki of 0.04 nM.
    Cathepsin Inhibitor 4
  • HY-149069
    TSC25
    		Inhibitor
    TSC25 is a potent cruzipain (CZP) inhibitor, with an IC50 of 3.34 nM and a pIC50 of 8.48.
    TSC25
  • HY-P4583
    Suc-Val-Pro-Phe-SBzl
    Suc-Val-Pro-Phe-SBzl (succinyl-valine-proline-phenylalanine thiobenzyl ester) is an inhibitor of CatG enzymes with IC50 values of 111-225 mM.
    Suc-Val-Pro-Phe-SBzl
  • HY-P4787
    Ac-Glu-Asp(EDANS)-Lys-Pro-Ile-Leu-Phe-Phe-Arg-Leu-Gly-Lys(DABCYL)-Glu-NH2
    Ac-Glu-Asp(EDANS)-Lys-Pro-Ile-Leu-Phe-Phe-Arg-Leu-Gly-Lys(DABCYL)-Glu-NH2 is a cathepsin D substrate, that can be used for cathepsin D FRET assay.
    Ac-Glu-Asp(EDANS)-Lys-Pro-Ile-Leu-Phe-Phe-Arg-Leu-Gly-Lys(DABCYL)-Glu-NH2
  • HY-181655
    Cathepsin D degrader 1
    		Degrader
    Anti-hepatic fibrosis agent 3 is an orally active anti-hepatic fibrosis compound targeting Cathepsin D. Anti-hepatic fibrosis agent 3 shows an IC50 of 53.18 μM against COL1A1-promoter and a Kd of 8.86 μM for binding to Cathepsin D. Anti-hepatic fibrosis agent 3 directly binds to and promotes the degradation of Cathepsin D, with no significant effect on Cathepsin B or Cathepsin L. Anti-hepatic fibrosis agent 3 inhibits hepatic stellate cell activation and reduces extracellular matrix deposition and inflammatory cytokine expression. Anti-hepatic fibrosis agent 3 exhibits remarkable anti-fibrotic activity in rat BDL and mouse CDAHFD-induced hepatic fibrosis models. Anti-hepatic fibrosis agent 3 can be used for the study of hepatic fibrosis.
    Cathepsin D degrader 1
Cat. No. Product Name / Synonyms Species Source
Cat. No. Product Name / Synonyms Application Reactivity
Cathepsin Isoform Comparison

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