| MERID |
Inhibitor |
Inhibitor name |
Ki |
Conditions |
Reference |
| I02.036 |
FhKT1 (Fasciola hepatica) |
|
1.6 nm |
|
Smith et al., 2016 |
| I02.056 |
HWTI trypsin inhibitor (Ornithoctonus huwena) |
|
|
|
Kodama et al., 2020 |
| I03.012 |
cruzipain inhibitor (Bauhinia bauhinioides) |
|
0.22 nM |
|
De Oliveira et al., 2001 |
| I03.016 |
Bauhinia trypsin/plasma kallikrein inhibitor |
|
0.2 nM |
|
Valois et al., 2020 |
| I04.004 |
protein C inhibitor |
|
|
|
Fortenberry et al., 2010 |
| I04.008 |
squamous cell carcinoma antigen 1 |
|
0.064 nM |
|
Takeda et al., 1995 |
| I04.017 |
serpin B13 |
|
|
|
Jayakumar et al., 2003 |
| I04.033 |
myeloid and erythroid nuclear termination stage-specific protein (Gallus gallus) |
|
|
|
|
| I04.036 |
colligin 2 |
|
|
|
Siavash et al., 2002 |
| I04.041 |
serpin srp-2 (Caenorhabditis elegans) |
|
|
|
Pak et al., 2002 |
| I04.042 |
serpinb3b (Mus musculus) |
|
|
|
Sakata et al., 2004 |
| I04.048 |
endopin 2C |
|
|
|
Hwang et al., 2005 |
| I04.081 |
serpin SRP-6 (Caenorhabditis elegans) |
|
|
|
Luke et al., 2007 |
| I25.001 |
cystatin A |
|
1.3 nM |
|
Barrett et al., 1986 |
| I25.003 |
cystatin B |
|
0.23 nM |
|
Barrett et al., 1986 |
| I25.004 |
cystatin C |
|
<0.005 nM |
|
Abrahamson, 1994 |
| I25.005 |
cystatin D |
|
25 nM |
|
Abrahamson, 1994 |
| I25.006 |
cystatin 6 |
|
1.78 nM |
|
Cheng et al., 2006 |
| I25.007 |
cystatin F |
|
0.31 nM |
|
Ni et al., 1998 |
| I25.011 |
ovocystatin |
|
0.019 nM |
|
Barrett et al., 1986 |
| I25.014 |
phytocystatin |
CaneCPI-2 |
0.17 nM |
|
Shibao et al., 2020 |
| I25.014 |
phytocystatin |
CaneCPI-3 |
0.6 nM |
|
Shibao et al., 2020 |
| I25.014 |
phytocystatin |
CaneCPI-5 |
0.34 nM |
|
Shibao et al., 2020 |
| I25.014 |
phytocystatin |
CaneCPI-6 |
6.94 nM |
|
Shibao et al., 2020 |
| I25.014 |
phytocystatin |
CPI-2 ({Citrus sinensis}) |
0.018 nM |
|
Schneider et al., 2020 |
| I25.016 |
kininogen inhibitor unit 2 |
|
0.14 nM |
|
Barrett et al., 1986 |
| I25.017 |
kininogen inhibitor unit 3 |
|
0.005 nM |
|
Barrett et al., 1986 |
| I25.018 |
T-kininogen inhibitor unit 2 |
|
|
|
Moreau et al., 1988 |
| I25.019 |
T-kininogen inhibitor unit 3 |
|
|
|
Moreau et al., 1988 |
| I25.022 |
histidine-rich glycoprotein inhibitor unit 1 |
|
0.1 nM |
|
Marks et al., 1988 |
| I25.033 |
phytocystatin (Actinidia sp.) |
|
0.001 nM |
|
Rassam & Laing, 2004 |
| I25.045 |
caneCPI cystatin (Saccharum sp.) |
|
0.021 nM |
|
Gianotti et al., 2008 |
| I25.045 |
caneCPI cystatin (Saccharum sp.) |
CaneCPI-4 |
0.021 nM |
|
Shibao et al., 2020 |
| I25.049 |
sialostatin L (Ixodes scapularis) |
|
|
|
Kotsyfakis et al., 2006 |
| I25.049 |
sialostatin L (Ixodes scapularis) |
cystatin 2b ({Rhipicephalus microplus}) |
2.48 nM |
|
<%Parizi et al., 2015%> |
| I25.049 |
sialostatin L (Ixodes scapularis) |
cystatin 2a ({Ixodes ovatus}) |
4.39 nM |
|
<%Parizi et al., 2015%> |
| I25.049 |
sialostatin L (Ixodes scapularis) |
cystatin 2c ({Rhipicephalus microplus}) |
28.45 nM |
|
<%Parizi et al., 2015%> |
| I25.049 |
sialostatin L (Ixodes scapularis) |
ricistatin ({Ixodes ricinus}) |
8.43 nM |
|
Martins et al., 2023 |
| I25.051 |
cystatin Hv-CPI1 (Hordeum vulgare) |
CaneCPI-1 |
0.6 nM |
|
Shibao et al., 2020 |
| I25.054 |
cystatin Hv-CPI5 (Hordeum vulgare) |
CPI-1 ({Citrus clementina}) |
0.19 nM |
|
Schneider et al., 2020 |
| I25.064 |
cystatin RHcyst-1 (Rhipicephalus haemaphysaloides) |
Rhcyst-1 |
|
|
<%Wang et al., 2015%> |
| I25.068 |
TK-cystatin (Thelohanellus kitauei) |
|
|
|
<%Zhang et al., 2020%> |
| I25.UPA |
subfamily I25A unassigned peptidase inhibitors |
FhCyLS-2 ({Fasciola hepatica}) |
|
|
Busa et al., 2023 |
| I25.UPB |
subfamily I25B unassigned peptidase inhibitors |
CPI-1 ({Citrus sinensis}) |
0.028 nM |
|
Schneider et al., 2020 |
| I25.UPB |
subfamily I25B unassigned peptidase inhibitors |
CPI-2 ({Citrus clementina}) |
0.006 nM |
|
Schneider et al., 2020 |
| I25.UPB |
subfamily I25B unassigned peptidase inhibitors |
CPI-3 ({Citrus clementina}) |
0.1 nM |
|
Schneider et al., 2020 |
| I29.001 |
cathepsin L propeptide |
|
0.12 nM |
|
Guay et al., 2000 |
| I29.002 |
cytotoxic T-lymphocyte antigen-2 alpha |
|
24 nM |
|
Delaria et al., 1994 |
| I29.004 |
cathepsin S propeptide |
|
0.46 nM |
|
Guay et al., 2000 |
| I29.005 |
Bombyx-type cysteine peptidase inhibitor |
|
0.036 nM |
|
Kurata et al., 2001 |
| I29.007 |
cathepsin K propeptide |
|
3.6-6.3 nM |
|
Guay et al., 2000 |
| I29.008 |
cytotoxic T-lymphocyte antigen-2 beta |
|
25 nM |
|
Delaria et al., 1994 |
| I29.009 |
crammer peptidase inhibitor |
|
0.43 nM |
|
Deshapriya et al., 2007 |
| I29.010 |
cathepsin V propeptide |
|
9.8 nM |
|
Burden et al., 2007 |
| I29.UPW |
family I29 unassigned peptidase inhibitors |
cathepsin L3 propeptide ({Fasciola hepatica}) |
|
|
Pritsch et al., 2020 |
| I31.002 |
MHC II invariant chain p41 form |
|
1.7 pM |
|
Bevec et al., 1996 |
| I31.006 |
testican-1 |
|
0.7 nM |
|
Bocock et al., 2003 |
| I31.UPW |
family I31 unassigned peptidase inhibitors |
thyropin ({Ixodes ricinus}) |
|
|
Matouskova et al., 2024 |
| I31.UPW |
family I31 unassigned peptidase inhibitors |
EpCAM (Epithelial cell adhesion molecule) |
|
|
Sankpal %etla, 2021 |
| I39.001 |
alpha-2-macroglobulin |
|
|
|
Barrett, 1981 |
| I48.001 |
clitocypin |
|
0.41 nM |
|
Brzin et al., 2000 |
| I71.001 |
falstatin |
|
0.032 nM |
|
Pandey et al., 2006 |
| I81.001 |
toxostatin-1 (Toxoplasma gondii) |
|
|
|
Huang et al., 2009 |
| I85.001 |
macrocypin 1 |
|
3.81 nm |
natural inhibitor |
Sabotic et al., 2009 |
| I85.002 |
macrocypin 3 |
|
0.31 nm |
recombinant form |
Sabotic et al., 2009 |
| I85.003 |
macrocypin 4 |
|
2.76 nm |
recombinant form |
Sabotic et al., 2009 |
|
calpain inhibitor IV |
|
|
|
Angliker et al., 1992 |
|
CLIK-071 |
|
|
|
Katunuma et al., 1999 |
|
CLIK-195 |
CLIK-195 |
|
|
Katunuma et al., 2003 |
|
CLIK-195 |
|
|
|
Kihara et al., 2002 |
|
KGP94 |
|
|
|
Chavarria et al., 2012 |
|
gallinamide A |
|
9000 |
|
Miller et al., 2014 |
|
small-molecule inhibitors of cysteine peptidases |
Z-Phe-Gly-NHO-Bz |
|
|
|
|
small-molecule inhibitors of cysteine peptidases |
vinyl ester compound 23 |
|
|
Shah et al., 2010 |
|
small-molecule inhibitors of cysteine peptidases |
gallinamide A |
9000 M-1s-1 |
|
Miller et al., 2014 |
|
small-molecule inhibitors of cysteine peptidases |
ortho-benzyloxyl phenylacetyl derivative 1 |
|
|
Yuan et al., 2018 |
|
small-molecule inhibitors of cysteine peptidases |
p-toluenesulfonyl derivative 3 |
|
|
Yuan et al., 2018 |
|
small-molecule inhibitors of cysteine peptidases |
Caffeic acid |
|
|
Ulcakar & Novinec, 2020 |
|
small-molecule inhibitors of cysteine peptidases |
azanitrile 8 |
|
|
Breidenbach et al., 2021 |
|
small-molecule inhibitors of cysteine peptidases |
Z-Tyr-Ala-CHN(2) |
|
|
Doijen et al., 2023 |
|
small-molecule inhibitors of cysteine peptidases |
CV11 |
|
|
Ciaglia et al., 2024 |
|
small-molecule inhibitors of cysteine peptidases |
RI175 |
|
|
Meewan et al., 2022 |
|
small-molecule inhibitors of cysteine peptidases |
RI173 |
|
|
Meewan et al., 2022 |
|
small-molecule inhibitors of cysteine peptidases |
RI172 |
|
|
Meewan et al., 2022 |
|
small-molecule inhibitors of cysteine peptidases |
Z-Phe-Tyr-CHO |
|
|
Zhou et al., 2024 |
|
small-molecule inhibitors of cysteine peptidases |
IMB 8015 |
|
|
Zhou et al., 2024 |
|
small-molecule inhibitors of cysteine peptidases |
SM141 |
|
|
Mondal et al., 2022 |
|
small-molecule inhibitors of cysteine peptidases |
SM142 |
|
|
Mondal et al., 2022 |
|
small-molecule inhibitors of cysteine peptidases |
Teicoplanin |
|
|
Yu et al., 2022 |
|
small-molecule inhibitors of cysteine peptidases |
daptomycin |
|
|
Yang et al., 2022 |
|
small-molecule inhibitors of cysteine peptidases |
peptide R(S) 1A |
|
|
Phan et al., 2021 |
|
small-molecule inhibitors of cysteine peptidases |
VPC285786 |
|
|
Smith et al., 2026 |
|
leupeptin |
|
|
|
Kirschke et al., 1976 |
|
leupeptin |
leupeptin hemisulfate |
|
|
Yang et al., 2022 |
|
boceprevir |
|
|
|
Hu et al., 2021 |
|
aldehyde, ketone, glyoxal, or semicarbazone inhibitors of cysteine peptidases |
peptidomimetic alpha-ketoamide compound 14a |
|
|
Xie et al., 2024 |
|
aldehyde, ketone, glyoxal, or semicarbazone inhibitors of cysteine peptidases |
peptidomimetic alpha-ketoamide compound 14b |
|
|
Xie et al., 2024 |
|
aldehyde, ketone, glyoxal, or semicarbazone inhibitors of cysteine peptidases |
tripeptide aldehyde D6-3 |
|
|
Deng et al., 2024 |
|
SJA6017 |
|
|
|
Inoue et al., 2003 |
|
ALLN |
|
0.5 nM |
|
Sasaki et al., 1990 |
|
ALLN |
|
|
|
Yang et al., 2022 |
|
ALLM |
|
0.6 nM |
|
Sasaki et al., 1990 |
|
ALLM |
|
|
|
Hu et al., 2021 |
|
calpeptin |
|
|
|
Yang et al., 2022 |
|
nitrile inhibitors of cysteine peptidases |
compound 35 |
9.3 (pKi) |
|
Ribeiro et al., 2020 |
|
nitrile inhibitors of cysteine peptidases |
compound 36 |
9.8 (pKi) |
|
Ribeiro et al., 2020 |
|
NapSul-Ile-Trp-CHO |
|
|
|
Rebbaa et al., 2009 |
|
Z-FY-CHO |
|
0.6nM |
|
Shenoy & Sivaraman, 2011 |
|
peptidyl cyclopropenone inhibitor of cysteine peptidase |
compound 8f |
|
|
Ando et al., 1999 |
|
GC376 |
|
|
|
Hu et al., 2021 |
|
calpain inhibitor XII |
|
|
|
|
|
calpain inhibitor XII |
|
|
|
Hu et al., 2021 |
|
proteasome inhibitor aldehydes |
|
|
|
Falke et al., 2024 |
|
MG132 |
|
|
|
Yang et al., 2022 |
|
E64 |
|
|
half-time: 0.7s at 10 microM inhibitor |
Salvesen & Nagase, 2001 |
|
E64d |
|
|
|
Tamai et al., 1986 |
|
CLIK148 |
|
|
|
Tsuge et al., 1999 |
|
CLIK148 |
CLIK-148 |
|
|
Katunuma et al., 2003 |
|
CAA0225 |
|
|
|
Takahashi et al., 2009 |
|
AM4299 |
AM4299A |
|
|
Morishita et al., 1994 |
|
AM4299 |
AM4299B |
|
|
Morishita et al., 1994 |
|
CLIK-066 |
|
|
|
Katunuma et al., 1999 |
|
CLIK-088 |
|
|
|
Katunuma et al., 1999 |
|
CLIK-112 |
|
|
|
Katunuma et al., 1999 |
|
CLIK-121 |
|
|
|
Katunuma et al., 1999 |
|
CLIK-181 |
|
|
|
Katunuma et al., 1999 |
|
CLIK-185 |
|
|
|
Katunuma et al., 1999 |
|
CLIK-187 |
|
|
|
Katunuma et al., 1999 |
|
Z-Phe-Tyr(OBut)-CHN(2) |
|
|
|
Shaw et al., 1993 |
|
BIL-DMK diazomethane inhibitor of cysteine peptidases |
|
|
|
Falgueyret et al., 2004 |
|
BIL-DMK diazomethane inhibitor of cysteine peptidases |
Z-Phe-Ala fluoromethyl ketone |
|
|
|
|
Z-Leu-Leu-Tyr-FMK |
|
|
|
Angliker et al., 1992 |
|
Z-FA-FMK |
|
|
|
Yang et al., 2022 |
|
Z-DEVD-FMK |
z-DEVD-cmk |
|
k2/K1 = 36000 M-1s-1 |
Rozman-Pungercar et al., 2003 |
|
Ac-YVAD-CMK |
|
|
k2/K1 = 1900 M-1s-1 |
Rozman-Pungercar et al., 2003 |
|
Z-Phe-Phe-fluoromethane |
|
|
|
Wang et al., 2013 |
|
peptide isostere cysteine peptidase inhibitors |
omicsynin B4 |
|
|
Li et al., 2023 |
|
K777 |
|
|
|
Jacobsen et al., 2000 |
|
peptide inhibitors of cysteine peptidases |
propeptide-based inhibitor biphenyl-4-yl-acetaldehyde-Cys-D-Arg-Tyr-2-phenylethylamine |
|
|
Chowdhury et al., 2002 |
|
peptide inhibitors of cysteine peptidases |
peptide SnuCalCpI03 ({Calotropis procera}) |
|
|
Kwon et al., 2022 |
|
peptide inhibitors of cysteine peptidases |
peptide SnuCalCpI15 ({Calotropis procera}) |
|
|
Kwon et al., 2022 |
|
allicin |
|
|
|
Waag et al., 2010 |
|
resveratrol |
miyabenol C |
|
|
Wang et al., 2023 |
|
resveratrol |
trans-epsilon-viniferin |
|
|
Wang et al., 2023 |
|
metal-containing inhibitor of threonine peptidase (general) |
zinc pyrithione |
|
|
Kladnik et al., 2022 |
| LI25.002 |
kininogen |
|
0.017 nM |
|
Barrett et al., 1986 |
| LI25.003 |
T-kininogen |
|
0.18 nM |
|
Moreau et al., 1988 |
| LI31.001 |
equistatin |
|
0.051 nM |
|
Lenarcic et al., 1997 |
| S60.001 |
lactoferrin |
|
|
|
|