Table 6 Selectivity of the bispecific inhibitor against different human proteases

From: An orally available Mpro/TMPRSS2 bispecific inhibitor with potent anti-coronavirus efficacy in vivo

Host protease

Inhibition (%)

STD (%)

Concentration (μM)

Type

SI for Mpro

SI for TMPRSS2

Calpain 1

4.89

8.63

100

Cys

323

>78

Caspase-2

21.67

5.64

100

Cys

323

>78

Chymotrypsin

-14.65

22.65

50

Ser

161

>39

Cathepsin L

19.89

2.69

100

Cys

323

>78

Cathepsin D

0.66

2.03

100

Aps

323

>78

Neutrophil Elastase

6.37

1.14

100

Ser

323

>78

Thrombin

30.86

2.12

100

Ser

323

>78

  1. Cys cysteine protease, Ser serine protease, Aps aspartic protease, STD standard deviation, SI selection index.