Table 1 Binding affinities (Kd) of Ang II and ARBs to AT1 WT and mutants receptors

From: Unique binding behavior of the recently approved angiotensin II receptor blocker azilsartan compared with that of candesartan

Receptor

[Sar 1 , Ile 8 ]Ang II

Candesartan

Azilsartan

Azilsartan-7H

WT

0.7±0.1 (1.0)

2.6±0.5 (1.0)

3.1±0.2 (1.0)

49±9 (1.0)

S105A

0.5±0.3 (0.7)

5.4±2.0 (2.1)

12±3 (3.9)

33±5 (0.7)

S109A

1.4±0.1 (2.0)

5.6±0.7 (2.2)

11±3 (3.5)

29±9 (0.6)

N111G

0.8±0.5 (1.0)

15±5 (5.8)

48±6 (15)

2362±756 (48)

N111G/

1.3±0.9 (1.9)

241±41 (93)

754±54 (243)

13654±667 (279)

K199Q

    

N111G/

1.0±0.2 (1.4)

64±18 (25)

71±27 (15)

4477±437 (91)

Q257A

    

Y113A

1.0±0.4 (1.4)

173±45 (67)

232±96 (75)

14794±482 (302)

Y113F

1.8±1.0 (2.6)

7.9±3.6 (3.0)

14±0.3 (4.5)

523±128 (11)

V116A

1.0±0.4 (1.4)

7.4±2.7 (2.8)

9.6±0.8 (3.1)

76±23 (1.6)

F182A

0.6±0.2 (0.9)

3.2±0.5 (1.2)

7.1±0.9 (2.3)

23±5 (0.5)

Y184A

1.0±0.4 (1.4)

2.0±0.7 (1.2)

4.8±1.3 (2.3)

24±9 (0.5)

K199A

3.3±0.5 (4.7)

53±5 (20)

103±7 (33)

2059±344 (42)

F208A

0.7±0.3 (1.0)

3.6±1.2 (1.4)

7.5±1.9 (2.4)

30±12 (0.6)

W253A

2.2±0.8 (3.1)

13±2 (5.0)

25±4 (8.1)

40±7 (0.8)

H256A

0.8±0.3 (1.1)

4.3±1.6 (1.7)

5.6±2.4 (1.8)

54±11 (1.1)

Q257A

2.5±0.2 (3.6)

37±8 (14)

309±22 (100)

5028±1216 (103)

T287A

1.3±0.2 (1.9)

15±5 (5.8)

30±7 (9.7)

741±35 (15)

Y292A

1.7±0.8 (2.4)

4.6±1.4 (1.8)

18±5 (5.8)

22±4 (0.4)

N295A

6.4±2.1 (9.3)

99±16 (38)

212±97 (68)

2291±861 (47)

  1. Abbreviations: Ang II, angiotensin II; ARB, AT1 receptor blocker; AT1, angiotensin II type 1; WT, wild type.
  2. Numbers in parentheses show ratio of Kd (mutant)/Kd (WT).