DNA Topoisomerase I

(All numbering and residues are taken from first PDB file)

Bending Residue Dihedral Analysis

Residue
i
Residue
i+1
Distance of hinge axis to residue i in conformer 1
(A)
Distance of hinge axis to residue i in conformer 2
(A)
Change in psi (i)
(deg)
Change in phi (i+1)
(deg)
Angle of psi(i) axis to hinge axis conformer 1
(deg)
Angle of psi(i) axis to hinge axis conformer 2
(deg)
Percentage Progress
 THR-277   SER-278  12.9 12.6 -5.1 1.1 8.3 10.7 31.6
 SER-278   LYS-279  11.2 10.9 21.7 -16.6 96.3 92.8 14.1
 LYS-279   PRO-280  9.6 9.2 -0.1 0.7 40.0 35.7 8.3
 PRO-280   GLY-281  6.7 6.3 2.2 2.3 144.9 140.8 -46.8
 GLY-281   ALA-282  7.4 7.1 -0.4 3.0 81.0 81.8 -2.1

Downloading Image

Graph shows rotational transition at bending residues and can be used to identify hinge bending residues.
Probably only informative for interdomain rotations greater than 20 degrees


Residue
i
Residue
i+1
Distance of hinge axis to residue i in conformer 1
(A)
Distance of hinge axis to residue i in conformer 2
(A)
Change in psi (i)
(deg)
Change in phi (i+1)
(deg)
Angle of psi(i) axis to hinge axis conformer 1
(deg)
Angle of psi(i) axis to hinge axis conformer 2
(deg)
Percentage Progress
 GLN-402   MET-403  6.9 6.9 3.1 -3.6 150.2 151.8 2.4
 MET-403   THR-404  4.2 4.2 4.3 -7.1 109.1 109.6 9.8
 THR-404   PRO-405  5.3 5.1 -0.9 3.1 114.7 110.7 1.3
 PRO-405   ALA-406  7.3 7.1 -3.9 2.8 64.3 65.7 -4.0

Downloading Image

Graph shows rotational transition at bending residues and can be used to identify hinge bending residues.
Probably only informative for interdomain rotations greater than 20 degrees