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Table 1 Inhibition of rPpAChE1 and rPpAChE1-G119S by different classes of AChE inhibitors

From: Acetylcholinesterase of the sand fly, Phlebotomus papatasi (Scopoli): construction, expression and biochemical properties of the G119S orthologous mutant

Compound

Inhibitor class

Wild type rPpAChE1

G119S rPpAChE1

Resistance Ratio

aIC50(95% CI)

aIC50(95% CI)

Paraoxon

acylation site

2.863 (1.862–4.401)

3,819 (3,205–4,550)

1336

Malaoxon

acylation site

4.361 (3.184–5.972)

1,972 (1,665–2,340)

452

Eserine

acylation site

3.2 (2.6–4.0)

86 (73–102)

27

Propoxur

acylation site

220 (147–329)

4,227,000 (−−)b

19,213

Carbofuran

acylation site

24 (17–33)

124,000 (−−)

5,200

1

acylation site

14 (10–19)

236,800 (7,404–7,575,000)

17,000

2

acylation site

36 (28–48)

123,100 (−−)

3,400

3

acylation site

13 (9.4–19)

235 (164–336)

18

4

acylation site

75 (36–152)

4,775 (3,048–7,482)

64

5

acylation site

76 (50–117)

2,128 (1,267–3,573)

28

Tacrine

choline binding site

67 (56–81)

388 (318–473)

5.8

6

bivalent

0.42 (0.35–0.52)

2.7 (2.3–3.2)

6.4

7

bivalent

14 (13–15)

35 (28–42)

2.5

Donepezil

bivalent

52 (39–70)

262 (202–341)

5.0

Tubocurarine

peripheral site

143,200 (94,630–216,700)

661,800 (290,000–1,511,000)

4.6

Ethidium Bromide

peripheral site

17,100 (13,890–21,060)

6,433 (4,380–9,448)

0.4

  1. aIC50 = inhibitor concentration producing 50% inhibition of activity (in nM), where (95% CI) = 95% confidence interval.
  2. b(−−) denotes wide confidence limits from incomplete inhibition of rPpAChE1-G119S.