transmembrane serine protease 2 | S1: Chymotrypsin | IUPHAR/BPS Guide to PHARMACOLOGY

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transmembrane serine protease 2

Target not currently curated in GtoImmuPdb

Target id: 2421

Nomenclature: transmembrane serine protease 2

Family: S1: Chymotrypsin

Annotation status:  image of a grey circle Awaiting annotation/under development. Please contact us if you can help with annotation.  » Email us

Gene and Protein Information
Species TM AA Chromosomal Location Gene Symbol Gene Name Reference
Human - 492 21q22.3 TMPRSS2 transmembrane serine protease 2
Mouse - 490 16 C2 Tmprss2 transmembrane protease, serine 2
Rat - 490 11q12 Tmprss2 transmembrane serine protease 2
Previous and Unofficial Names
epitheliasin | PRSS10 | plasmic transmembrane protein X | transmembrane protease, serine 2 | transmembrane protease
Database Links
Specialist databases
MEROPS S01.247 (Hs)
Other databases
ChEMBL Target
Ensembl Gene
Entrez Gene
Human Protein Atlas
KEGG Enzyme
RefSeq Nucleotide
RefSeq Protein
Enzyme Reaction
EC Number: 3.4.21.-

Download all structure-activity data for this target as a CSV file

Key to terms and symbols View all chemical structures Click column headers to sort
Ligand Sp. Action Value Parameter Reference
I-432 Hs Inhibition 9.1 pKi 4
pKi 9.1 (Ki 9x10-10 M) [4]
compound 5 [PMID: 21741839] Hs Inhibition 7.7 pKi 5
pKi 7.7 (Ki 2x10-8 M) [5]
nafamostat Hs Inhibition 7.0 pIC50 6
pIC50 7.0 (IC50 1x10-7 M) [6]
Description: Inhibition of TMPRSS2-dependent MERS-S-mediated membrane fusion in an in vitro reporter assay.
camostat Hs Inhibition 6.0 pIC50 6
pIC50 6.0 (IC50 1x10-6 M) [6]
Description: Inhibition of TMPRSS2-dependent MERS-S-mediated membrane fusion in an in vitro reporter assay.
Immuno Process Associations
Immuno Process:  Barrier integrity
GO Annotations:  Associated to 1 GO processes
GO:0046598 positive regulation of viral entry into host cell IDA
Immuno Process:  Antigen presentation
GO Annotations:  Associated to 1 GO processes, IEA only
click arrow to show/hide IEA associations
GO:0005044 scavenger receptor activity IEA
General Comments
TMPRSS2 is expressed on the epithelial cells of human lungs, and it is involved in the activation of viral glycoproteins/viral entry across a range of viruses, including influenza A virus, metapneumovirus, and some coronaviruses (e.g. SARS-CoV [1]). Emerging data suggest that the novel coronavirus SARS-CoV-2 (formerly referred to as 2019-nCoV) uses the same entry receptor (ACE2) that is used by SARS-CoV. Like SARS-CoV, SARS-CoV-2 exploits host TMPRSS2 for spike protein priming [2]. In this study in vitro SARS-CoV-2 entry was partially blocked by the protease inhibitor camostat (which has inhibitory action against TMPRSS2 [3]).


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1. Bertram S, Glowacka I, Müller MA, Lavender H, Gnirss K, Nehlmeier I, Niemeyer D, He Y, Simmons G, Drosten C et al.. (2011) Cleavage and activation of the severe acute respiratory syndrome coronavirus spike protein by human airway trypsin-like protease. J. Virol., 85 (24): 13363-72. [PMID:21994442]

2. Hoffmann M, Kleine-Weber H, Schroeder S, Krüger N, Herrler T, Erichsen S, Schiergens TS, Herrler G, Wu NH, Nitsche A et al.. (2020) SARS-CoV-2 Cell Entry Depends on ACE2 and TMPRSS2 and Is Blocked by a Clinically Proven Protease Inhibitor. Cell, 181 (2): 271-280.e8. [PMID:32142651]

3. Kawase M, Shirato K, van der Hoek L, Taguchi F, Matsuyama S. (2012) Simultaneous treatment of human bronchial epithelial cells with serine and cysteine protease inhibitors prevents severe acute respiratory syndrome coronavirus entry. J. Virol., 86 (12): 6537-45. [PMID:22496216]

4. Pászti-Gere E, Czimmermann E, Ujhelyi G, Balla P, Maiwald A, Steinmetzer T. (2016) In vitro characterization of TMPRSS2 inhibition in IPEC-J2 cells. J Enzyme Inhib Med Chem, 31 (sup2): 123-129. [PMID:27277342]

5. Sielaff F, Böttcher-Friebertshäuser E, Meyer D, Saupe SM, Volk IM, Garten W, Steinmetzer T. (2011) Development of substrate analogue inhibitors for the human airway trypsin-like protease HAT. Bioorg. Med. Chem. Lett., 21 (16): 4860-4. [PMID:21741839]

6. Yamamoto M, Matsuyama S, Li X, Takeda M, Kawaguchi Y, Inoue JI, Matsuda Z. (2016) Identification of Nafamostat as a Potent Inhibitor of Middle East Respiratory Syndrome Coronavirus S Protein-Mediated Membrane Fusion Using the Split-Protein-Based Cell-Cell Fusion Assay. Antimicrob. Agents Chemother., 60 (11): 6532-6539. [PMID:27550352]

How to cite this page

S1: Chymotrypsin: transmembrane serine protease 2. Last modified on 30/03/2020. Accessed on 13/08/2020. IUPHAR/BPS Guide to PHARMACOLOGY,