Table 2 The remaining percent activity of enzyme in the presence of protease inhibitor.

From: Chikungunya nsP2 protease is not a papain-like cysteine protease and the catalytic dyad cysteine is interchangeable with a proximal serine

nsP2 pro

AGA

AGC

AGG

Leupeptin

 Wild Type

91.25 ± 2.58

100.2 ± 10.2

106.2 ± 9.7

 Cys478Ala

98.86 ± 8.11

102.5 ± 10.7

105.5 ± 7.0

 Ser482Ala

96.85 ± 5.39

98.42 ± 16.22

99.97 ± 8.02

 Trp549Ala

95.37 ± 11.19

93.77 ± 6.50

92.81 ± 8.45

 Trp549Phe

92.70 ± 3.56

91.84 ± 8.04

90.53 ± 3.80

E-64

 Wild Type

93.09 ± 2.66

104.1 ± 5.6

108.0 ± 6.0

 Cys478Ala

98.73 ± 8.81

104.7 ± 8.3

107.4 ± 1.4

 Ser482Ala

109.9 ± 13.9

95.98 ± 5.48

105.2 ± 8.4

 Trp549Ala

102.0 ± 8.10

98.57 ± 7.27

95.43 ± 8.44

 Trp549Phe

105.1 ± 5.20

96.35 ± 4.93

107.1 ± 6.15

Chymostatin

 Wild Type

84.03 ± 7.77

87.43 ± 0.09

90.42 ± 8.16

 Cys478Ala

98.57 ± 9.98

67.11 ± 26.39

63.78 ± 30.29

 Ser482Ala

123.2 ± 7.1

60.90 ± 17.90

51.57 ± 11.61

 Trp549Ala

87.88 ± 2.77

92.60 ± 4.00

105 ± 13.85

 Trp549Phe

81.29 ± 3.97

83.72 ± 2.54

80.79 ± 14.51

PMSF

 Wild Type

107.7 ± 4.3

93.07 ± 4.26

71.30 ± 6.67

 Cys478Ala

113.89 ± 63.3

70.82 ± 14.22

50.87 ± 28.14

 Ser482Ala

102.8 ± 8.3

87.56 ± 28.71

88.37 ± 6.57

 Trp549Ala

95.24 ± 4.27

100.32 ± 7.86

91.34 ± 8.85

 Trp549Phe

100.12 ± 3.61

83.05 ± 7.79

95.13 ± 4.31

  1. Percent remaining activity of protease compared to protease control with no inhibitor present. Values are means ± S.D. with n ≥ 3.