Contacts of the helix formed by residues 232 - 256 (chain C) in PDB entry 3AG2


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 HIS 232 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     76C  GLN*     4.4     3.0    -      -       -      +
    148C  HIS*     3.6    20.6    +      +       -      -
    151C  LEU*     3.5    26.2    -      -       +      +
    152C  MET*     3.9    14.3    -      -       +      +
    227C  PHE*     3.5    26.9    -      -       +      -
    228C  THR      2.9    18.2    +      -       -      -
    229C  SER      3.3    25.6    -      -       -      -
    230C  ASN*     4.0     9.1    +      -       -      -
    231C  HIS*     1.3    75.3    -      -       -      +
    233C  PHE*     1.3    68.7    +      -       -      +
    234C  GLY      3.2     2.7    -      -       -      -
    235C  PHE*     3.2     6.2    +      +       +      -
    236C  GLU*     3.1    34.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 233 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     71C  HIS*     6.0     2.5    -      -       -      +
     76C  GLN*     3.6    23.0    -      -       +      +
     79C  LEU*     3.4    52.7    -      -       +      -
     80C  ARG*     3.6    36.8    -      -       +      -
     83C  MET*     4.0     9.6    -      -       +      -
    231C  HIS*     4.0     6.3    -      -       +      +
    232C  HIS*     1.3    77.7    -      -       -      +
    234C  GLY*     1.3    66.5    +      -       -      +
    236C  GLU*     3.0    13.2    +      -       +      -
    237C  ALA*     2.8    47.6    +      -       +      +
    240C  TRP*     3.8    15.7    -      +       -      -
----------------------------------------------------------
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Residues in contact with GLY 234 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    214C  PHE*     3.5    18.1    -      -       -      -
    218C  CYS*     3.6     7.5    -      -       -      -
    221C  ARG*     4.3    18.1    -      -       -      +
    227C  PHE*     4.5     2.6    -      -       -      -
    232C  HIS      3.2     0.6    -      -       -      -
    233C  PHE*     1.3    82.0    -      -       -      +
    235C  PHE*     1.3    55.9    +      -       -      +
    237C  ALA*     3.5     4.2    +      -       -      -
    238C  ALA*     3.0    25.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 235 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    144C  ILE*     3.8    25.5    -      -       +      +
    147C  ALA*     3.9    11.0    -      -       +      -
    148C  HIS*     3.4    60.3    -      +       +      -
    151C  LEU*     4.2    10.3    -      -       +      -
    159C  MET*     3.7    25.6    -      -       +      -
    163C  LEU*     4.4    10.3    -      -       +      -
    215C  LEU*     5.4     2.2    -      -       +      -
    218C  CYS*     3.7    20.9    -      -       +      -
    227C  PHE*     3.9    20.2    -      -       +      -
    232C  HIS*     3.2    14.8    +      +       +      +
    233C  PHE      3.2     0.6    -      -       -      -
    234C  GLY*     1.3    74.6    -      -       -      +
    236C  GLU*     1.3    67.7    +      -       -      +
    238C  ALA*     3.3     1.9    +      -       -      +
    239C  ALA*     3.0    25.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 236 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     76C  GLN*     4.1     1.9    +      -       -      -
     80C  ARG*     2.6    44.6    +      -       -      -
    148C  HIS*     4.1    20.1    +      -       +      +
    230C  ASN      5.8     0.5    -      -       -      +
    232C  HIS*     3.1    33.3    +      -       +      +
    233C  PHE*     3.0    20.1    +      -       +      +
    235C  PHE*     1.3    78.7    -      -       -      +
    237C  ALA*     1.3    58.0    +      -       -      +
    239C  ALA*     3.1     5.2    +      -       -      +
    240C  TRP*     2.9    49.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 237 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     83C  MET*     3.7    27.8    -      -       +      +
    214C  PHE*     3.9    12.1    -      -       +      -
    233C  PHE*     2.8    43.0    +      -       +      +
    234C  GLY*     3.8     4.5    -      -       -      +
    236C  GLU*     1.3    73.3    -      -       -      +
    238C  ALA*     1.3    63.4    +      -       -      +
    240C  TRP*     3.4     7.1    +      -       -      +
    241C  TYR*     3.0    25.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 238 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    211C  GLY*     5.4     1.6    -      -       -      +
    214C  PHE*     3.5    36.9    -      -       +      +
    215C  LEU*     3.9    20.5    -      -       +      +
    218C  CYS*     3.8    13.0    -      -       -      -
    234C  GLY      3.0    18.6    +      -       -      +
    235C  PHE      3.8     3.1    -      -       -      +
    236C  GLU      3.3     0.2    -      -       -      -
    237C  ALA*     1.3    76.5    -      -       -      +
    239C  ALA*     1.4    56.4    +      -       -      +
    241C  TYR*     3.5     3.2    +      -       -      +
    242C  TRP*     2.9    30.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 239 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    144C  ILE*     3.6    27.7    -      -       +      +
    148C  HIS*     5.9     2.7    -      -       +      +
    235C  PHE*     3.0    24.7    +      -       +      +
    236C  GLU*     3.1    11.2    +      -       -      +
    238C  ALA*     1.4    74.6    -      -       -      +
    240C  TRP*     1.3    62.2    +      -       +      +
    242C  TRP*     3.2     1.9    +      -       -      +
    243C  HIS*     2.9    44.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with TRP 240 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     80C  ARG*     3.7    53.2    -      -       +      -
     83C  MET*     3.9    18.8    -      -       +      -
     84C  ILE*     3.7    22.4    -      -       +      -
     87C  ILE*     3.8    15.8    -      -       +      +
    233C  PHE*     3.8    23.6    -      +       -      -
    236C  GLU*     2.9    33.0    +      -       +      +
    237C  ALA*     3.8     5.6    -      -       -      +
    239C  ALA*     1.3    78.6    -      -       +      +
    241C  TYR*     1.3    59.4    +      -       -      +
    243C  HIS*     3.3    12.7    +      +       -      +
    244C  PHE*     2.9    27.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 241 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     83C  MET*     3.8    21.8    -      -       +      -
     86C  PHE*     3.9    13.3    -      +       -      -
     87C  ILE*     3.9    12.5    -      -       +      +
     90C  GLU*     3.3    18.4    +      -       +      -
    207C  HIS*     2.9    48.6    -      +       -      -
    210C  ILE*     3.7    22.5    -      -       +      +
    211C  GLY*     3.8    24.0    -      -       -      -
    214C  PHE*     4.7     8.1    -      +       +      -
    237C  ALA      3.0    17.7    +      -       -      +
    238C  ALA*     3.6     6.7    -      -       -      +
    240C  TRP*     1.3    76.4    -      -       -      +
    242C  TRP*     1.3    56.7    +      -       -      +
    244C  PHE*     3.3    17.3    +      +       -      +
    245C  VAL*     2.9    38.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with TRP 242 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    137C  LEU*     4.0    13.6    +      -       +      +
    140C  SER*     2.7    48.6    +      -       -      -
    141C  GLY*     4.6     3.8    -      -       -      -
    144C  ILE*     4.2    17.0    -      -       +      -
    166C  THR*     3.9    10.6    -      -       +      +
    170C  GLY*     3.7    23.3    -      -       -      -
    208C  VAL*     3.7    21.3    -      -       +      -
    211C  GLY*     3.8    14.1    -      -       -      -
    212C  SER*     3.6    36.8    -      -       -      -
    215C  LEU*     3.8    22.2    -      -       +      -
    238C  ALA      2.9    19.2    +      -       -      +
    239C  ALA      3.2     5.6    +      -       -      +
    241C  TYR*     1.3    78.0    -      -       -      +
    243C  HIS*     1.3    58.2    +      -       -      +
    245C  VAL*     3.2    11.9    +      -       +      +
    246C  ASP*     3.0    29.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with HIS 243 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    141C  GLY*     3.7    31.8    -      -       -      -
    144C  ILE*     3.9    17.5    -      -       +      +
    145C  THR*     4.0     9.6    +      -       -      -
    239C  ALA*     2.9    30.5    +      -       +      +
    240C  TRP*     3.3    13.4    +      +       -      +
    242C  TRP*     1.3    73.1    -      -       -      +
    244C  PHE*     1.3    60.4    +      -       -      +
    246C  ASP*     3.1     9.6    +      -       -      +
    247C  VAL*     2.8    39.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 244 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     87C  ILE*     3.8    19.3    -      -       +      -
     90C  GLU*     3.5    24.7    -      -       +      -
     91C  VAL*     3.7    37.5    -      -       +      -
     94C  PHE*     4.0    13.9    -      +       -      -
    207C  HIS*     3.9    23.8    -      +       +      -
    240C  TRP      2.9    13.6    +      -       -      +
    241C  TYR*     3.3    27.1    -      +       -      +
    243C  HIS*     1.3    76.5    -      -       -      +
    245C  VAL*     1.3    72.8    +      -       +      +
    247C  VAL*     3.2     6.1    +      -       +      +
    248C  VAL*     2.9    49.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 245 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    137C  LEU*     4.6     5.6    -      -       +      -
    204C  HIS*     2.9    29.9    +      -       +      +
    207C  HIS*     3.8    29.8    -      -       +      +
    208C  VAL*     3.4    35.4    -      -       +      +
    241C  TYR*     2.9    27.2    +      -       +      +
    242C  TRP*     3.2    22.6    +      -       +      +
    244C  PHE*     1.3    87.4    -      -       +      +
    246C  ASP*     1.3    61.4    +      -       -      +
    248C  VAL*     4.7     3.1    -      -       -      -
    249C  TRP*     3.1     8.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 246 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    137C  LEU*     3.6    43.5    -      -       +      +
    138C  LEU*     3.7    27.0    +      -       -      +
    141C  GLY*     4.7     7.7    -      -       -      -
    242C  TRP*     3.0    16.6    +      -       +      +
    243C  HIS*     3.3    16.9    +      -       -      +
    245C  VAL*     1.3    77.7    -      -       -      +
    247C  VAL*     1.3    66.2    +      -       +      +
    249C  TRP*     3.2     5.2    +      -       -      +
    250C  LEU*     3.0    26.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 247 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    243C  HIS*     2.8    26.4    +      -       +      +
    244C  PHE*     3.9     6.5    -      -       +      +
    246C  ASP*     1.3    73.4    -      -       +      +
    248C  VAL*     1.3    67.1    +      -       +      +
    250C  LEU*     3.1    24.1    +      -       +      +
    251C  PHE*     3.1    36.4    +      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 248 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91C  VAL*     5.8     1.3    -      -       +      -
     94C  PHE*     3.8    36.8    -      -       +      -
     98C  PHE*     4.6     5.6    -      -       +      -
    204C  HIS*     3.6    18.6    -      -       +      -
    244C  PHE*     2.9    51.7    +      -       +      +
    245C  VAL*     3.9     4.5    -      -       -      +
    247C  VAL*     1.3    76.9    -      -       +      +
    249C  TRP*     1.3    62.7    +      -       -      +
    251C  PHE*     3.2     8.6    +      -       -      +
    252C  LEU*     2.9    30.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with TRP 249 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    130C  PRO*     3.8    11.2    -      -       +      -
    133C  ASN*     3.7    21.3    -      -       +      -
    134C  THR*     2.8    41.5    +      -       +      +
    137C  LEU*     3.5    28.9    -      -       +      -
    173C  PHE*     3.7    20.9    -      +       -      -
    177C  GLN*     3.4    24.9    -      -       -      -
    201C  THR*     4.8     1.6    -      -       +      -
    204C  HIS*     3.6    18.0    +      +       -      +
    245C  VAL      3.1     7.7    +      -       -      +
    246C  ASP*     3.2     9.4    +      -       -      +
    248C  VAL*     1.3    75.4    -      -       -      +
    250C  LEU*     1.3    64.5    +      -       +      +
    252C  LEU*     3.1    13.1    +      -       +      +
    253C  TYR*     2.8    41.3    +      +       +      +
    257C  TYR*     3.4    36.1    -      +       -      -
----------------------------------------------------------
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Residues in contact with LEU 250 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    134C  THR*     3.9    28.0    -      -       +      -
    138C  LEU*     4.1    29.8    -      -       +      -
    246C  ASP*     3.0    25.4    +      -       -      +
    247C  VAL*     3.1    19.5    +      -       +      +
    249C  TRP*     1.3    79.2    -      -       +      +
    251C  PHE*     1.3    61.1    +      -       +      +
    253C  TYR*     3.5     5.7    +      -       +      +
    254C  VAL*     3.0    38.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 251 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98C  PHE*     3.6    25.8    -      +       +      -
    247C  VAL*     3.1    41.7    +      -       +      -
    248C  VAL*     3.6     7.2    -      -       -      +
    250C  LEU*     1.3    76.3    -      -       +      +
    252C  LEU*     1.3    61.6    +      -       -      +
    254C  VAL*     4.0     3.7    -      -       +      +
    255C  SER*     2.9    40.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 252 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     94C  PHE*     5.6     0.9    -      -       +      -
     98C  PHE*     3.6    22.2    -      -       +      -
    200C  ALA*     3.8    32.5    -      -       +      +
    201C  THR*     4.3     9.9    -      -       +      +
    204C  HIS*     3.4    40.6    -      -       +      -
    248C  VAL*     2.9    20.9    +      -       +      +
    249C  TRP*     3.5    20.9    -      -       +      +
    251C  PHE*     1.3    77.2    -      -       -      +
    253C  TYR*     1.3    57.0    +      -       -      +
    256C  ILE*     2.8    45.1    +      -       +      +
    257C  TYR*     3.3    10.5    +      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 253 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    126C  PRO*     2.7    43.2    +      -       +      +
    127C  LEU*     4.6     6.4    -      -       -      +
    130C  PRO*     3.6    30.5    -      -       +      -
    131C  LEU*     3.8    20.8    -      -       +      +
    134C  THR*     3.3    24.7    -      -       +      +
    249C  TRP*     2.8    34.9    +      +       +      +
    250C  LEU*     3.8     7.6    -      -       +      +
    252C  LEU*     1.3    74.1    -      -       -      +
    254C  VAL*     1.3    73.7    +      -       +      +
    257C  TYR*     3.4    12.9    +      -       +      +
    258C  TRP*     2.9    45.2    +      +       +      +
----------------------------------------------------------
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Residues in contact with VAL 254 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    102C  TYR*     5.5     1.6    -      -       -      +
    250C  LEU*     3.0    23.7    +      -       +      +
    251C  PHE*     4.0     4.7    -      -       +      +
    253C  TYR*     1.3    82.4    -      -       +      +
    255C  SER*     1.3    60.7    +      -       -      +
    258C  TRP*     3.5    29.9    -      -       +      +
    259C  TRP*     2.8    33.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 255 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98C  PHE*     3.9    17.7    -      -       -      -
    101C  PHE*     3.4    15.9    -      -       -      -
    102C  TYR*     2.7    40.2    +      -       -      -
    251C  PHE*     2.9    25.0    +      -       -      +
    252C  LEU      4.2     0.2    -      -       -      -
    254C  VAL*     1.3    79.6    -      -       -      +
    256C  ILE*     1.3    60.9    +      -       -      +
    259C  TRP*     3.5     3.5    -      -       -      -
    260C  GLY      2.9    24.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 256 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98C  PHE*     5.3     3.1    -      -       +      -
    101C  PHE*     3.8    44.3    -      -       +      -
    193C  TYR*     4.8    10.3    +      -       +      +
    196C  THR*     4.2     9.0    -      -       -      +
    197C  PHE*     3.8    36.3    -      -       +      +
    200C  ALA*     4.0    17.3    -      -       +      -
    201C  THR*     5.1     2.5    -      -       +      -
    252C  LEU*     2.8    42.4    +      -       +      +
    255C  SER*     1.3    78.6    -      -       -      +
    257C  TYR*     1.3    67.6    +      -       +      +
    260C  GLY*     3.6    20.4    -      -       -      +
    261C  SER*     4.8     0.5    -      -       -      -
----------------------------------------------------------
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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