Serine proteases are enzymes that cleave peptide bonds in proteins, in which serine serves as the nucleophilic amino acidat the active site. They are found ubiquitously in both eukaryotes and prokaryotes. Serine proteases fall into two broad categories based on their structure: chymotrypsin-like or subtilisin-like. In humans, serine proteases are responsible for co-ordinating various physiological functions, including digestion, immune response, blood coagulation and reproduction. Threnonine proteases are a family of proteolytic enzymes harbouring a threonine (Thr) residue within the active site. The prototype members of this class of enzymes are the catalytic subunits of the proteasome, however the acyltransferases convergently evolved the same active site geometry andmechanism.


Anti-infection >
Arenavirus Bacterial CMV Enterovirus Filovirus Fungal HBV HCV HIV HSV Influenza Virus Parasite Reverse Transcriptase RSV SARS-CoV
Antibody-drug Conjugate >
ADC Cytotoxin ADC Linker Drug-Linker Conjugates for ADC PROTAC-linker Conjugate for PAC
Apoptosis >
Apoptosis Bcl-2 Family c-Myc Caspase DAPK Ferroptosis IAP MDM-2/p53 PKD RIP kinase Survivin Thymidylate Synthase TNF Receptor
Autophagy >
Autophagy LRRK2 ULK Mitophagy
Cell Cycle/DNA Damage >
Antifolate APC ATM/ATR Aurora Kinase Casein Kinase CDK Checkpoint Kinase (Chk) CRISPR/Cas9 Deubiquitinase DNA Alkylator/Crosslinker DNA-PK DNA/RNA Synthesis Eukaryotic Initiation Factor (eIF) G-quadruplex Haspin Kinase HDAC HSP IRE1 Kinesin LIM Kinase (LIMK) Microtubule/Tubulin Mps1 Nucleoside Antimetabolite/Analog p97 PAK PARP PERK Polo-like Kinase (PLK) PPAR RAD51 ROCK Sirtuin SRPK Telomerase TOPK Topoisomerase Wee1
Cytoskeleton >
Arp2/3 Complex Dynamin Gap Junction Protein Integrin Kinesin Microtubule/Tubulin Mps1 Myosin PAK
Epigenetics >
AMPK Aurora Kinase DNA Methyltransferase Epigenetic Reader Domain HDAC Histone Acetyltransferase Histone Demethylase Histone Methyltransferase JAK MicroRNA PARP PKC Sirtuin Protein Arginine Deiminase
GPCR/G Protein >
5-HT Receptor Adenosine Receptor Adenylate Cyclase Adiponectin Receptor Adrenergic Receptor Angiotensin Receptor Bombesin Receptor Bradykinin Receptor Cannabinoid Receptor CaSR CCR CGRP Receptor Cholecystokinin Receptor CRFR CXCR Dopamine Receptor EBI2/GPR183 Endothelin Receptor GHSR Glucagon Receptor Glucocorticoid Receptor GNRH Receptor GPCR19 GPR109A GPR119 GPR120 GPR139 GPR40 GPR55 GPR84 Guanylate Cyclase Histamine Receptor Imidazoline Receptor Leukotriene Receptor LPL Receptor mAChR MCHR1 (GPR24) Melatonin Receptor mGluR Motilin Receptor Neurokinin Receptor Neuropeptide Y Receptor Neurotensin Receptor Opioid Receptor Orexin Receptor (OX Receptor) Oxytocin Receptor P2Y Receptor Prostaglandin Receptor Protease-Activated Receptor (PAR) Ras RGS Protein Sigma Receptor Somatostatin Receptor TSH Receptor Urotensin Receptor Vasopressin Receptor Melanocortin Receptor
Immunology/Inflammation >
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JAK/STAT Signaling >
EGFR JAK Pim STAT
MAPK/ERK Pathway >
ERK JNK KLF MAP3K MAP4K MAPKAPK2 (MK2) MEK Mixed Lineage Kinase MNK p38 MAPK Raf Ribosomal S6 Kinase (RSK)
Membrane Transporter/Ion Channel >
ATP Synthase BCRP Calcium Channel CFTR Chloride Channel CRAC Channel CRM1 EAAT2 GABA Receptor GlyT HCN Channel iGluR Monoamine Transporter Monocarboxylate Transporter Na+/Ca2+ Exchanger Na+/HCO3- Cotransporter Na+/K+ ATPase nAChR NKCC P-glycoprotein P2X Receptor Potassium Channel Proton Pump SGLT Sodium Channel TRP Channel URAT1
Metabolic Enzyme/Protease >
15-PGDH 5 alpha Reductase 5-Lipoxygenase Acetyl-CoA Carboxylase Acyltransferase Adenosine Deaminase Adenosine Kinase Aldehyde Dehydrogenase (ALDH) Aldose Reductase Aminopeptidase Angiotensin-converting Enzyme (ACE) ATGL ATP Citrate Lyase Carbonic Anhydrase Carboxypeptidase Cathepsin CETP COMT Cytochrome P450 Dipeptidyl Peptidase Dopamine β-hydroxylase E1/E2/E3 Enzyme Elastase Enolase FAAH FABP Factor Xa Farnesyl Transferase Fatty Acid Synthase (FAS) FXR Glucokinase GSNOR Gutathione S-transferase HCV Protease Hexokinase HIF/HIF Prolyl-Hydroxylase HIV Integrase HIV Protease HMG-CoA Reductase (HMGCR) HSP Indoleamine 2,3-Dioxygenase (IDO) Isocitrate Dehydrogenase (IDH) Lactate Dehydrogenase LXR MAGL Mineralocorticoid Receptor Mitochondrial Metabolism MMP Nampt NEDD8-activating Enzyme Neprilysin PAI-1 PDHK PGC-1α Phosphatase Phosphodiesterase (PDE) Phospholipase Procollagen C Proteinase Proteasome Pyruvate Kinase RAR/RXR Renin ROR Ser/Thr Protease SGK Stearoyl-CoA Desaturase (SCD) Thrombin Tryptophan Hydroxylase Tyrosinase Xanthine Oxidase
Neuronal Signaling >
5-HT Receptor AChE Adenosine Kinase Amyloid-β Beta-secretase CaMK CGRP Receptor COMT Dopamine Receptor Dopamine Transporter FAAH GABA Receptor GlyT iGluR Imidazoline Receptor mAChR Melatonin Receptor Monoamine Oxidase nAChR Neurokinin Receptor Opioid Receptor Serotonin Transporter γ-secretase
NF-κB >
NF-κB IKK Keap1-Nrf2 MALT1
PI3K/Akt/mTOR >
Akt AMPK ATM/ATR DNA-PK GSK-3 MELK mTOR PDK-1 PI3K PI4K PIKfyve PTEN
PROTAC >
PROTAC E3 Ligase Ligand-Linker Conjugate Ligand for E3 Ligase PROTAC Linker PROTAC-linker Conjugate for PAC
Protein Tyrosine Kinase/RTK >
Ack1 ALK Bcr-Abl BMX Kinase Btk c-Fms c-Kit c-Met/HGFR Discoidin Domain Receptor DYRK EGFR Ephrin Receptor FAK FGFR FLT3 IGF-1R Insulin Receptor IRAK Itk PDGFR PKA Pyk2 ROS Src Syk TAM Receptor Trk Receptor VEGFR
Stem Cell/Wnt >
Casein Kinase ERK Gli GSK-3 Hedgehog Hippo (MST) JAK Notch Oct3/4 PKA Porcupine ROCK sFRP-1 Smo STAT TGF-beta/Smad Wnt YAP β-catenin γ-secretase
TGF-beta/Smad >
TGF-beta/Smad PKC ROCK TGF-β Receptor
Vitamin D Related >
VD/VDR
Others >
Androgen Receptor Aromatase Estrogen Receptor/ERR Progesterone Receptor Thyroid Hormone Receptor Others

CRA-2059

CRA-2059 is a highly specific and selective tryptase inhibitor, with a Ki of 620 pM for recombinant human tryptase-β (rHTβ)[1][2].

  • CAS Number: 256649-36-2
  • MF: C34H46N12O8
  • MW: 750.80
  • Catalog: Ser/Thr Protease
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

BC11 hydrobromide

BC-11 hydrobromide is a selective TMPRSS2 inhibitor (TMPRSS2 is a key host cellular factor for viral entry and SARS-CoV-2 pathogenesis), and a selective urokinase (uPA) inhibitor (IC50=8.2 μM). BC-11 hydrobromide is cytotoxic to triple-negative MDA-MB231 breast cancer cells. BC-11 hydrobromide is used in research on viral infections and cancer[1][2][3].

  • CAS Number: 443776-49-6
  • MF: C8H12BBrN2O2S
  • MW: 290.97
  • Catalog: SARS-CoV
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Leupeptin

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[1][2][3].

  • CAS Number: 55123-66-5
  • MF: C40H78N12O12S
  • MW: 951.18600
  • Catalog: Cathepsin
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Plasma kallikrein-IN-4

Plasma kallikrein-IN-4 (Example 153) is a plasma kallikrein inhibitor with an IC50 of 0.016 μM against human plasma kallikrein[1].

  • CAS Number: 1357954-34-7
  • MF: C22H23N7O
  • MW: 401.46
  • Catalog: Ser/Thr Protease
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Boc-Gln-Ala-Arg-AMC · HCl

Boc-Gln-Ala-Arg-AMC hydrochloride is a fluorogenic substrate for trypsin. Boc-Gln-Ala-Arg-AMC hydrochloride can also be used for measuring the proteolytic activity of TMPRSS2[1][2].

  • CAS Number: 201849-55-0
  • MF: C29H43ClN8O8
  • MW: 667.154
  • Catalog: Ser/Thr Protease
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

PCSK9-IN-1

PCSK9-IN-1 is a novel and highly potent cyclic peptide PCSK9 inhibitor with a Ki value of 1.46 nM.

  • CAS Number: 2730022-10-1
  • MF: C65H80FN11O12S2
  • MW: 1290.53
  • Catalog: Ser/Thr Protease
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

PCSK9-IN-16

PCSK9-IN-16 is a potent PCSK9 inhibitor. PCSK9-IN-16 is extracted from patent WO2020150474, example 87, has the potential for hypercholesterolemia and other cardiovascular diseases research[1].

  • CAS Number: 2455424-51-6
  • MF: C16H20N6O2S3
  • MW: 424.56
  • Catalog: Ser/Thr Protease
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

TAO Kinase inhibitor 2

TAO Kinase inhibitor 2 (Example 49) is a TAO Kinase inhibitor (IC50=between 50 and 500 nM). TAO Kinase inhibitor 2 also inhibits KIAA1361 and JIK with IC50s of 50-500 nM[1].

  • CAS Number: 850467-77-5
  • MF: C25H24N2O3
  • MW: 400.47
  • Catalog: Ser/Thr Protease
  • Density: 1.3±0.1 g/cm3
  • Boiling Point: 665.5±55.0 °C at 760 mmHg
  • Melting Point: N/A
  • Flash Point: 356.3±31.5 °C

4-Aminobenzamidine dihydrochloride

4-Aminobenzamidine (p-Aminobenzamidine) dihydrochloride is a strong trypsin inhibitor, also acting as a relatively weak urokinase type plasminogen activator (uPA) inhibitor (Ki=82 μM). 4-Aminobenzamidine can inhibit growth of a human prostate tumor in SCID mice[1][2].

  • CAS Number: 2498-50-2
  • MF: C7H11Cl2N3
  • MW: 208.088
  • Catalog: Ser/Thr Protease
  • Density: 1.26g/cm3
  • Boiling Point: 289.8ºC at 760 mmHg
  • Melting Point: >300 °C(lit.)
  • Flash Point: 129ºC

Kallikrein-IN-1

Kallikrein-IN-1 (Formula A) is a Kallikrein inhibitor[1].

  • CAS Number: 1933514-53-4
  • MF: C28H26FN5O4
  • MW: 515.54
  • Catalog: Ser/Thr Protease
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

PPACKII (trifluoroacetate salt)

PPACK II diTFA is an irreversible and specific glandular and plasma kallikreins inhibitor[1].

  • CAS Number: 649748-23-2
  • MF: C29H35ClF6N6O7
  • MW: 729.068
  • Catalog: Ser/Thr Protease
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Recombinant Kex2 protease

Recombinant Kex2 protease is a membrane-bound, Ca2+-dependent serine protease. Recombinant Kex2 protease specifically recognize and cleave the carboxyl-terminal peptide bonds of dibasic amino acids[1].

  • CAS Number: 99676-46-7
  • MF:
  • MW:
  • Catalog: Ser/Thr Protease
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

PCSK9-IN-18

PCSK9-IN-18 (compound 188) is a potent PCSK9 inhibitor with a KD value of <200 nM[1].

  • CAS Number: 2455425-15-5
  • MF: C15H20N6O2S
  • MW: 348.42
  • Catalog: Ser/Thr Protease
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

APC-6860

APC-6860 is a trypsin-like serine proteases inhibitor with ki values of 0.21 and 0.44 μM for uPA and trypsin, respectively. APC-6860 has a selectivity ratio for tPA versus uPA of 80. APC-6860 has ki values of 0.1 and 0.082 μM for human and murine urokinases, respectively. APC-6860 can be used for the research of cancer[1][2].

  • CAS Number: 154628-42-9
  • MF: C9H7IN2S
  • MW: 302.13500
  • Catalog: Ser/Thr Protease
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

DCLK1-IN-2

DCLK1-IN-2 (compound I-5) is a potent DCLK1 inhibitor with an IC50 of 171.3  nM. DCLK1-IN-2 shows remarkable antiproliferative effects on SW1990 cell lines (IC50 of 0.6 μM) and in vivo antitumor potency[1].

  • CAS Number: 2978517-43-8
  • MF: C26H32N8O3S
  • MW: 536.65
  • Catalog: Ser/Thr Protease
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Benzoyl-D-arginine 4-nitroanilide hydrochloride

Bz-D-Arg-pNA hydrochloride is a competitive trypsin inhibitor[1].

  • CAS Number: 21653-41-8
  • MF: C19H23ClN6O4
  • MW: 434.87700
  • Catalog: Ser/Thr Protease
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Ralpancizumab

Ralpancizumab is a selective PCSK9 inhibitor with potential application in hemorrhagic stroke[1].

  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Ebronucimab

Ebronucimab (AK102) is an IgG1-λ2 antibody targeting PCSK9 and is primarily expressed by CHO DG44 (Chinese Hamster Ovary) cells[1].

  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Suc-Ala-Ala-Pro-Arg-pNA acetate salt

Suc-AAPR-pNA is a substrate of trypsin acyl-enzymes. Suc-AAPR-pNA can be used to test trypsin acyl-enzymes activity[1][2].

  • CAS Number: 131068-47-8
  • MF: C27H39N9O9
  • MW: 633.65
  • Catalog: Ser/Thr Protease
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

NBI-961

NBI-961 is a potent NEK2 inhibitor that inhibits proteasomal degradation. NBI-961 induces G2/mitosis arrest and apoptosis in diffuse large B cell lymphoma (DLBCL) cells[1].

  • CAS Number: 2225902-98-5
  • MF: C28H27F3N6O2S
  • MW: 568.61
  • Catalog: Apoptosis
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Plasma kallikrein-IN-3

Plasma kallikrein-IN-3 is a plasma kallikrein inhibitor (IC50: 0.15 μM). Plasma kallikrein-IN-3 can be used for hereditary angioedema, diabetic macular edema, and diabetic retinopathy research[1].

  • CAS Number: 1357950-47-0
  • MF: C20H23N5O2
  • MW: 365.43
  • Catalog: Ser/Thr Protease
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Frovocimab

Frovocimab (LY 3015014) is a humanized IgG4 monoclonal antibody (mAb) that neutralizes PCSK9. Frovocimab inhibits PCSK9 binding to LDL receptor (LDLR) while permitting the normal proteolytic cleavage of the bound intact PCSK9[1].

  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Tilpisertib

Tilpisertib is a serine/threonine kinase inhibitor (WO2017007689)[1].

  • CAS Number: 2065153-41-3
  • MF: C33H33ClN8O
  • MW: 593.12
  • Catalog: Ser/Thr Protease
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

ACK

GGACK (H-Glu-Gly-Arg-CMK) is an irreversible substrate-like serine protease urokinase-type plasminogen activator (uPA) inhibitor[1].

  • CAS Number: 65113-67-9
  • MF: C14H25ClN6O5
  • MW: 392.83900
  • Catalog: PAI-1
  • Density: 1.52g/cm3
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

PF-06815345 hydrochloride

PF-06815345 hydrochloride is an orally active and potent inhibitor of proprotein convertase subtilisin/kexin type 9 (PCSK9) with an IC50 value of 13.4 μM. PF-06815345 hydrochloride significantly decreases the PCSK9 level in vivo in mouse[1][2].

  • CAS Number: 2334434-49-8
  • MF: C27H30Cl2FN9O4
  • MW: 634.49
  • Catalog: Ser/Thr Protease
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Bococizumab

Bococizumab (PF-04950615) is an anti-human PCSK9 inhibitory antibody that reduces LDL cholesterol levels. Bococizumab can be used in the research of hypercholesterolemia[1][2].

  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

ZK824190

ZK824190 is an orally available and selective urokinase plasminogen activator (uPA) inhibitor as a potential treatment for multiple sclerosis. IC50s of 237, 1600 and 1850 nM for uPA, tPA, and Plasmin, respectively[1].

  • CAS Number: 2254001-81-3
  • MF: C22H20F2N2O4
  • MW: 428.44
  • Catalog: PAI-1
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

TMPRSS6-IN-1

TMPRSS6-IN-1 (compound 8) is a potent inhibitor of TMPRSS6 (Matriptase-2), belonging to TTSPs (transmembrane serine protease). TMPRSS6, is a type II TTSP, the genetic reduction of which will improve symptoms of hemochromatosis and beta thalassemia in mice[1].

  • CAS Number: 2088415-78-3
  • MF: C33H40N8O4S2
  • MW: 676.85
  • Catalog: Ser/Thr Protease
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Ongericimab

Ongericimab (JS002) is a humanized anti-PCSK9 monoclonal antibody. Ongericimab has lipid-lowering efficacy. Ongericimab can be used in research of hypercholesteremia and hyperlipidemia[1].

  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Trypsin inhibitor

Trypsin Inhibitor, soybean is a potent and reversible inhibitor of trypsin[1].

  • CAS Number: 9035-81-8
  • MF:
  • MW: 12500
  • Catalog: Ser/Thr Protease
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A