Table 5.
EF-hand angles determined using the vector geometry mapping (VGM) method
N-terminal coordinate of second helix |
Θ (°) | Φ (°) | Ω (°) | |||
---|---|---|---|---|---|---|
Pseudo-EF hand | ||||||
Ca2+-S100Ba,b | 8.2 | −0.2 | −6.8 | 50 | 87 | 109 |
Zn2+,Ca2+-S100Ba | 8.2 | 0.0 | −6.4 | 50 | 87 | 108 |
Pnt-Ca2+-S100Ba | 8.3 | −0.1 | −6.5 | 51 | 91 | 107 |
Pnt-Zn2+,Ca2+-S100Ba | 8.2 | 0.0 | −6.7 | 51 | 90 | 105 |
Typical EF hand | ||||||
Ca2+-S100Ba,b | 8.9 | 0.3 | −6.6 | 74 | 102 | 75 |
Zn2+,Ca2+-S100Ba | 8.8 | −0.2 | −6.8 | 76 | 104 | 75 |
Pnt-Ca2+-S100Ba | 8.8 | 0.4 | −6.5 | 74 | 104 | 69 |
Pnt-Zn2+,Ca2+-S100Ba | 8.8 | 0.3 | −6.5 | 75 | 105 | 70 |
VGM angles were calculated by way of VGM software (K. Yap, University of Toronto) using the helices and structures indicated.
The residues used for the VGM calculations were as follows: helix I, residues 10–17; helix II, residues 29–39; helix III, residues 53–60; and helix IV, residues 70–80.
Calculated using PDB entry 1MHO.