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Table 1 The tilt angles of transmembrane helices in SsTRIC and CeTRIC-B1/B2

From: Ion- and water-binding sites inside an occluded hourglass pore of a trimeric intracellular cation (TRIC) channel

Transmembrane helices

 

η angle (°)

 

SsTRIC

CeTRIC-B1

CeTRIC-B2

M1

26.9

31.5

34.8

M2a

46.0

64.1

66.9

M2b

41.5

63.0

61.7

M3

14.1

21.2

20.7

M4

19.0

46.7

46.2

M5a

51.8

54.6

55.6

M5b

37.8

59.4

60.4

M6

25.3

17.7

20.3

M7

4.7

13.2

19.9

  1. The tilt angle (η) is defined as the angle between the axis of each individual transmembrane helix and the central C3 axis (parallel with the membrane normal) of the SsTRIC trimer or CeTRIC-B1/B2 trimer