Contacts of the helix formed by residues 185 - 212 (chain A) in PDB entry 4Y5U


Residue contacts within the protein are derived with the CSU software (Sobolev V., Sorokine A., Prilusky J., Abola E.E. and Edelman M. (1999) Automated analysis of interatomic contacts in proteins. Bioinformatics, 15, 327-332). A short description of the analytical approach is given at the end of the page.
For CSU analysis of other PDB entry

Note:
Non-standard 3 letter residue codes indicate a heterogroup. To identify and analyse, use LPC software

Legend:
Dist - nearest distance (Å) between atoms of two residues
Surf - contact surface area (Å2) between two residues
HB   - hydrophilic-hydrophilic contact (hydrogen bond)
Arom - aromatic-aromatic contact
Phob - hydrophobic-hydrophobic contact
DC   - hydrophobic-hydrophilic contact (destabilizing contact)
+/-  - indicates presence/absence of a specific contacts
*    - indicates residues forming contacts  by their side chain
       (including CA atoms)
Residues in contact with GLU 185 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    140A  ARG*     3.7    25.8    +      -       -      +
    182A  LEU*     2.9    47.6    -      -       -      +
    183A  LEU*     3.8     1.8    -      -       -      -
    184A  GLN*     1.3    58.3    +      -       -      +
    186A  THR*     1.3    65.7    +      -       -      +
    187A  THR*     3.0     5.4    +      -       -      -
    188A  GLY*     3.2     6.5    +      -       -      +
    189A  GLU*     3.0    26.9    +      -       -      +
    260A  ARG*     4.9     3.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 186 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    137A  LEU*     3.7     7.5    -      -       +      +
    140A  ARG*     3.3    38.0    +      -       +      +
    141A  VAL*     3.9    25.1    -      -       +      +
    144A  ILE*     5.2     3.1    -      -       +      -
    183A  LEU*     2.9    21.4    +      -       -      +
    184A  GLN*     2.9     8.1    -      -       +      +
    185A  GLU*     1.3    75.5    -      -       -      +
    187A  THR*     1.3    56.8    +      -       +      +
    189A  GLU*     3.1     8.5    -      -       -      +
    190A  LEU*     2.9    24.8    +      -       -      +
    238A  LEU*     3.8    24.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 187 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    184A  GLN*     2.9    33.9    -      -       +      +
    186A  THR*     1.3    75.4    -      -       +      +
    188A  GLY*     1.3    59.6    +      -       -      +
    189A  GLU      3.2     0.9    -      -       -      -
    190A  LEU*     3.5    10.0    +      -       -      +
    191A  GLU*     3.1    28.4    +      -       -      +
    238A  LEU*     3.9    20.9    -      -       +      -
    257A  LEU*     4.6    10.1    -      -       +      -
    260A  ARG*     2.3    36.3    +      -       -      +
    261A  LEU*     4.2    19.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 188 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    185A  GLU*     3.2    10.4    +      -       -      +
    187A  THR*     1.3    80.8    +      -       -      +
    189A  GLU*     1.3    57.4    +      -       -      +
    191A  GLU*     3.2    17.7    +      -       -      +
    192A  ALA*     3.0    27.9    +      -       -      +
    260A  ARG*     4.0     8.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 189 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    136A  ARG*     4.8    14.9    +      -       -      -
    137A  LEU*     4.1    22.6    +      -       +      +
    140A  ARG*     3.4    44.5    +      -       -      -
    185A  GLU*     3.0    13.2    +      -       +      +
    186A  THR*     3.1    14.5    -      -       -      +
    188A  GLY*     1.3    75.8    -      -       -      +
    190A  LEU*     1.3    58.4    +      -       -      +
    192A  ALA*     3.9     7.2    +      -       -      +
    193A  ALA*     3.4    20.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 190 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    137A  LEU*     4.1     9.8    -      -       +      +
    186A  THR      2.9    12.3    +      -       -      +
    187A  THR*     3.5     8.5    -      -       -      +
    188A  GLY      3.2     0.2    -      -       -      -
    189A  GLU*     1.3    75.4    -      -       -      +
    191A  GLU*     1.3    64.9    +      -       -      +
    192A  ALA      3.1     0.4    -      -       -      -
    193A  ALA*     3.3     3.8    +      -       -      +
    194A  LYS*     3.1    19.4    +      -       -      +
    231A  LEU*     3.7    40.6    -      -       +      +
    234A  ILE*     4.1    10.8    -      -       +      -
    235A  TYR*     4.2    13.7    -      -       -      -
    238A  LEU*     4.1    13.0    -      -       +      -
    261A  LEU*     3.6    29.6    -      -       +      -
    264A  VAL*     3.9    21.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 191 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    187A  THR      3.1    20.0    +      -       -      +
    188A  GLY*     3.2     9.8    +      -       -      +
    190A  LEU*     1.3    75.9    -      -       -      +
    192A  ALA*     1.3    57.4    +      -       -      +
    194A  LYS*     3.2    12.8    +      -       -      +
    195A  ALA*     3.1    23.4    +      -       -      +
    260A  ARG*     3.3    51.0    +      -       -      +
    261A  LEU*     6.1     0.7    -      -       +      -
    264A  VAL*     3.7    24.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 192 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    188A  GLY      3.0    15.5    +      -       -      +
    189A  GLU*     3.9     8.7    -      -       -      +
    191A  GLU*     1.3    75.1    -      -       -      +
    193A  ALA*     1.3    64.0    +      -       -      +
    195A  ALA*     3.3     8.8    +      -       -      +
    196A  LEU*     3.1    26.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 193 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133A  GLY      6.3     0.9    -      -       -      -
    134A  LEU*     6.0     2.0    -      -       +      +
    137A  LEU*     4.3     9.0    -      -       +      -
    189A  GLU      3.4    11.9    +      -       -      +
    190A  LEU      3.3     9.5    +      -       -      +
    192A  ALA*     1.3    79.7    -      -       -      +
    194A  LYS*     1.3    61.1    +      -       -      +
    196A  LEU*     3.3    12.3    +      -       -      +
    197A  VAL*     3.2    26.5    +      -       -      +
    231A  LEU*     4.0    24.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 194 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    190A  LEU      3.1    12.1    +      -       -      +
    191A  GLU*     3.2    20.1    +      -       -      +
    193A  ALA*     1.3    75.7    -      -       -      +
    195A  ALA*     1.3    73.5    +      -       -      +
    197A  VAL*     3.4     3.1    +      -       -      +
    198A  LEU*     3.2    42.8    +      -       +      +
    231A  LEU*     4.0    11.6    -      -       +      +
    264A  VAL*     4.2    31.9    -      -       +      +
    267A  THR*     3.1    31.6    +      -       -      +
    268A  LEU*     4.1    19.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 195 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    191A  GLU      3.1    12.9    +      -       -      +
    192A  ALA*     3.5    11.9    -      -       -      +
    194A  LYS*     1.3    85.0    -      -       -      +
    196A  LEU*     1.3    66.3    +      -       +      +
    198A  LEU*     3.5     7.3    +      -       -      +
    199A  LYS*     3.2    24.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 196 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    130A  PHE*     4.7    22.4    -      -       -      +
    192A  ALA      3.1    15.7    +      -       -      +
    193A  ALA*     3.4    14.6    -      -       -      +
    194A  LYS      3.2     0.2    -      -       -      -
    195A  ALA*     1.3    82.3    -      -       +      +
    197A  VAL*     1.3    58.4    +      -       +      +
    199A  LYS*     3.3    24.2    -      -       +      +
    200A  ARG*     3.1    26.0    +      -       -      +
    227A  ARG*     4.8     3.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 197 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    193A  ALA      3.2    16.3    +      -       -      +
    194A  LYS*     3.4     6.5    +      -       -      +
    196A  LEU*     1.3    73.5    -      -       +      +
    198A  LEU*     1.3    59.6    +      -       -      +
    199A  LYS      3.2     0.2    -      -       -      -
    200A  ARG*     3.1     7.0    +      -       -      +
    201A  ILE*     2.9    36.3    +      -       +      +
    224A  LEU*     4.4    11.0    -      -       +      +
    227A  ARG*     4.3    31.6    -      -       +      +
    228A  CYS*     3.8    28.5    -      -       -      -
    231A  LEU*     4.3    15.0    -      -       +      -
    268A  LEU*     4.4     7.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 198 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    194A  LYS*     3.2    48.2    +      -       +      +
    195A  ALA*     3.7     7.2    -      -       -      +
    197A  VAL*     1.3    77.3    -      -       -      +
    199A  LYS*     1.3    56.8    +      -       -      +
    201A  ILE*     3.8     9.1    +      -       +      +
    202A  GLN*     3.2    28.2    +      -       -      +
    267A  THR*     4.5     8.1    -      -       -      +
    268A  LEU*     4.4    13.0    -      -       +      -
    271A  SER*     3.5    35.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 199 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    195A  ALA      3.2    12.0    +      -       -      +
    196A  LEU*     3.3    29.7    -      -       +      +
    198A  LEU*     1.3    79.8    -      -       -      +
    200A  ARG*     1.3    58.2    +      -       -      +
    202A  GLN*     3.4     6.3    -      -       +      +
    203A  ILE*     2.9    46.8    +      -       +      +
    435A  MET*     5.5     6.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 200 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    196A  LEU      3.1     9.2    +      -       -      +
    197A  VAL      3.1     9.3    +      -       -      +
    199A  LYS*     1.3    77.9    -      -       -      +
    201A  ILE*     1.3    64.6    +      -       -      +
    202A  GLN      3.2     1.1    -      -       -      -
    203A  ILE*     3.0    39.6    +      -       -      +
    204A  TRP*     3.1    37.5    +      -       -      +
    207A  GLN*     4.0     6.3    +      -       -      +
    219A  GLU*     3.8    18.6    +      -       -      -
    220A  SER      5.8     0.4    +      -       -      -
    224A  LEU*     3.7    33.0    -      -       +      +
    227A  ARG*     3.3    35.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 201 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    197A  VAL*     2.9    41.2    +      -       +      +
    198A  LEU*     4.0    10.5    -      -       +      +
    200A  ARG*     1.3    71.2    -      -       -      +
    202A  GLN*     1.3    62.3    +      -       -      +
    204A  TRP*     3.2     7.8    +      -       -      +
    205A  LYS*     3.1    34.8    +      -       +      +
    221A  LEU*     6.0     0.4    -      -       +      -
    224A  LEU*     4.3    16.2    -      -       +      -
    228A  CYS*     4.8     9.9    -      -       -      -
    268A  LEU*     5.7     1.1    -      -       +      +
    271A  SER*     3.9    27.8    -      -       -      +
    272A  CYS*     5.1     0.9    -      -       -      +
    274A  LEU*     3.7    39.0    -      -       +      -
    296A  LEU*     4.8     5.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 202 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    198A  LEU      3.2    17.6    +      -       -      +
    199A  LYS*     3.4    10.3    -      -       +      +
    201A  ILE*     1.3    77.5    -      -       -      +
    203A  ILE*     1.3    64.8    +      -       -      +
    205A  LYS*     3.2    29.2    +      -       -      +
    206A  ARG*     3.3    20.4    +      -       -      +
    435A  MET*     3.6    49.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 203 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    199A  LYS*     2.9    33.6    +      -       +      +
    200A  ARG*     3.0    30.7    -      -       -      +
    201A  ILE      3.3     0.2    -      -       -      -
    202A  GLN*     1.3    77.2    -      -       -      +
    204A  TRP*     1.3    60.2    +      -       -      +
    206A  ARG*     3.5     6.4    +      -       -      +
    207A  GLN*     3.3    32.0    +      -       +      +
    435A  MET*     3.9    24.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with TRP 204 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    200A  ARG*     3.1    33.5    +      -       -      +
    201A  ILE*     3.6     7.2    -      -       -      +
    202A  GLN      3.2     0.2    -      -       -      -
    203A  ILE*     1.3    74.5    -      -       -      +
    205A  LYS*     1.3    73.2    +      -       +      +
    207A  GLN*     3.3    11.5    +      -       -      +
    208A  GLN*     3.1    53.0    +      -       -      +
    217A  PHE*     3.8    17.0    -      +       -      -
    219A  GLU*     3.5    40.9    +      -       +      +
    220A  SER      4.2     5.5    +      -       -      -
    221A  LEU*     3.5    46.1    -      -       +      +
    224A  LEU*     4.5    10.5    -      -       +      -
    274A  LEU*     4.6    11.4    -      -       +      -
    275A  VAL      4.5     7.9    -      -       -      -
    276A  GLU*     4.5     6.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 205 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    201A  ILE*     3.1    28.1    +      -       +      +
    202A  GLN*     3.2    32.7    +      -       -      +
    204A  TRP*     1.3    89.5    -      -       +      +
    206A  ARG*     1.3    58.8    +      -       -      +
    207A  GLN      3.3     0.2    -      -       -      -
    208A  GLN*     3.5     9.6    +      -       -      +
    209A  GLN*     3.0    27.8    +      -       -      +
    274A  LEU*     4.7    13.5    -      -       +      +
    408A  LEU*     5.3     2.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 206 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    202A  GLN      3.3    10.5    +      -       -      +
    203A  ILE*     3.6    10.3    -      -       -      +
    204A  TRP      3.3     0.2    -      -       -      -
    205A  LYS*     1.3    76.9    -      -       -      +
    207A  GLN*     1.3    58.9    +      -       +      +
    209A  GLN*     3.0    26.0    +      -       -      +
    210A  LEU*     3.1    48.2    +      -       +      +
    430A  ASN      2.6    28.7    +      -       -      -
    431A  ALA      3.0    23.2    +      -       -      -
    432A  PHE*     4.6     0.2    -      -       -      +
    433A  SER      3.6    26.1    +      -       -      +
    434A  GLU      5.8     0.2    -      -       -      -
    435A  MET*     4.0    30.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 207 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    200A  ARG*     4.0     7.4    +      -       -      +
    203A  ILE*     3.3    25.2    +      -       +      +
    204A  TRP*     3.4    17.3    -      -       -      +
    205A  LYS      3.3     0.4    -      -       -      -
    206A  ARG*     1.3    80.2    -      -       +      +
    208A  GLN*     1.3    59.3    +      -       -      +
    210A  LEU*     3.4     7.9    +      -       +      +
    211A  ALA*     3.2    22.3    +      -       -      +
    215A  ALA*     5.3     0.9    -      -       -      +
    217A  PHE*     3.6    19.6    +      -       +      +
    219A  GLU*     3.2    33.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 208 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    204A  TRP*     3.1    30.8    +      -       +      +
    205A  LYS*     3.7    10.3    -      -       -      +
    207A  GLN*     1.3    72.6    -      -       -      +
    209A  GLN*     1.3    64.7    +      -       -      +
    211A  ALA*     3.6     3.2    +      -       -      +
    212A  GLY*     3.6    14.2    +      -       -      -
    217A  PHE*     3.5    31.4    -      -       +      -
    275A  VAL      3.2    16.5    +      -       -      +
    276A  GLU      3.0    28.3    +      -       -      -
    278A  GLN*     3.3    34.0    +      -       +      +
    408A  LEU*     4.5     5.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 209 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    205A  LYS      3.0    17.0    +      -       -      +
    206A  ARG*     3.0    35.0    +      -       -      +
    208A  GLN*     1.3    77.7    -      -       -      +
    210A  LEU*     1.3    61.8    +      -       -      +
    212A  GLY      3.3     8.7    +      -       -      -
    408A  LEU*     3.9    34.2    -      -       +      +
    429A  ASP*     3.8     4.6    +      -       -      -
    430A  ASN*     3.5    40.9    +      -       -      +
    433A  SER*     3.6    21.6    +      -       -      -
    434A  GLU      5.6     0.7    -      -       -      +
    437A  ARG*     3.9    14.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 210 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    206A  ARG*     3.1    50.3    +      -       +      +
    207A  GLN*     3.4     8.3    +      -       +      +
    208A  GLN      3.3     0.2    -      -       -      -
    209A  GLN*     1.3    76.3    -      -       -      +
    211A  ALA*     1.3    54.3    -      -       -      +
    212A  GLY      3.1     1.3    -      -       -      -
    213A  ASN*     3.1    23.5    +      -       +      +
    215A  ALA*     3.2    26.6    +      -       +      +
    430A  ASN*     3.6    16.6    -      -       -      +
    431A  ALA*     4.1    14.1    -      -       +      +
    454A  THR*     6.1     0.2    -      -       -      +
    457A  LEU*     5.6     2.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 211 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    207A  GLN      3.2    16.7    +      -       -      +
    208A  GLN      3.6     8.1    -      -       -      +
    210A  LEU*     1.3    70.0    -      -       -      +
    212A  GLY*     1.3    58.6    +      -       -      +
    213A  ASN      3.2     1.6    -      -       -      -
    214A  GLY*     3.0    16.7    +      -       -      -
    215A  ALA*     3.6    24.2    -      -       -      +
    217A  PHE*     3.8    23.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 212 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    208A  GLN      3.6     6.7    +      -       -      -
    209A  GLN*     3.3    11.6    +      -       -      -
    210A  LEU      3.1     0.8    -      -       -      -
    211A  ALA*     1.3    77.9    -      -       -      +
    213A  ASN*     1.3    65.3    +      -       -      +
    214A  GLY      3.5     0.2    -      -       -      -
    281A  GLN*     4.5     7.7    -      -       -      +
    408A  LEU*     5.8     0.4    -      -       -      -
    426A  ILE*     5.7     1.6    -      -       -      +
    430A  ASN*     3.8    10.6    +      -       -      -
    458A  LYS*     5.1     5.2    +      -       -      -
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


   I  Hydrophilic      - N and O that can donate and accept hydrogen bonds
                         (e.g., oxygen of hydroxyl group of Ser. or Thr)
  II  Acceptor         - N or O that can only accept a hydrogen bond
 III  Donor            - N that can only donate a hydrogen bond
  IV  Hydrophobic      - Cl, Br, I and all C atoms that are not in
                         aromatic rings and do not have a covalent bond to
                         a N or O atom
   V  Aromatic         - C in aromatic rings irrespective of any other 
                         bonds formed by the atom
  VI  Neutral          - C atoms that have a covalent bond to at least one
                         atom of class I or two or more atoms from class II
                         or III; atoms; S, F, P, and metal atoms in all cases
 VII  Neutral-donor    - C atoms that have a covalent bond with only one
                         atom of class III
VIII  Neutral-acceptor - C atoms that have a covalent bond with only 
                         one atom of class II
For each pair of contacts the state of legitimacy is shown below:

Legend:
+, legitimate
-, illegitimate
------------------------------------------------------------
  Atomic class           I  II  III   IV   V   VI  VII  VIII
------------------------------------------------------------
   I  (Hydrophilic)      +   +    +    -   +   +    +    +
  II  (Acceptor)         +   -    +    -   +   +    +    -
 III  (Donor)            +   +    -    -   +   +    -    +
  IV  (Hydrophobic)      -   -    -    +   +   +    +    +
   V  (Aromatic)         +   +    +    +   +   +    +    +
  VI  (Neutral)          +   +    +    +   +   +    +    +
 VII  (Neutral-donor)    +   +    -    +   +   +    -    +
VIII  (Neutral-acceptor) +   -    +    +   +   +    +    -
------------------------------------------------------------
Warning!
Atom classes for heterogroups are automatically assigned based on the atomic coordinates. However, in three cases (see below) the automatic assignment is currently ambiguous. In these cases, the user is advised to manually analyse the full list of contacts using LPC software.
1. Carbon atoms belonging to a 4-, 5- or 6-member ring are 
   considered "aromatic" (Class V) if the ring is approximately
   planar, and "hydrophobic" (Class IV) or "neutral" (Classes
   VI, VII, VIII) if the ring is non-planar.
2. The oxygen atom of a carbonyl or hydroxy group is considered
   "hydroxy" (Class I) if the CO bond is longer than 1.29 Å, and
   "carbonyl" (Class II) if shorter.
3. All nitrogen atoms are considered "hydrophilic" (Class I).

Please E-mail any questions and/or suggestions concerning this page to Vladimir.Sobolev@weizmann.ac.il