Contacts of the helix formed by residues 221 - 245 (chain C) in PDB entry 4DQM


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 ASP 221 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    212C  ASN*     3.4    22.5    -      -       -      +
    213C  SER*     2.9    28.9    +      -       -      +
    218C  VAL*     3.4     9.2    -      -       +      +
    220C  LEU*     1.3    70.1    -      -       -      +
    222C  ILE*     1.3    58.5    +      -       -      +
    223C  ASP*     2.7    18.9    +      -       -      +
    224C  LEU*     3.2    14.2    +      -       +      -
    225C  TRP*     3.0    24.8    +      -       -      +
    299C  ASN*     2.9    20.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 222 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    220C  LEU*     3.5    11.2    +      -       +      +
    221C  ASP*     1.3    73.5    +      -       -      +
    223C  ASP*     1.3    63.8    +      -       +      +
    225C  TRP*     3.5    28.3    -      -       +      -
    226C  ASP*     2.9    39.1    +      -       -      +
    401C  GLU      5.2     1.8    -      -       -      +
    402C  ILE*     4.2     7.4    -      -       +      -
    403C  PRO*     3.4    37.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 223 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    212C  ASN*     3.1    24.9    +      -       -      +
    221C  ASP*     2.7    11.6    +      -       -      +
    222C  ILE*     1.3    80.0    -      -       -      +
    224C  LEU*     1.3    58.4    +      -       -      +
    226C  ASP*     3.3    14.4    +      -       -      +
    227C  LYS*     3.1    53.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 224 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    210C  THR*     4.6     7.2    -      -       +      -
    212C  ASN*     3.7    24.9    +      -       +      +
    213C  SER*     3.6    23.8    -      -       -      +
    221C  ASP*     3.2    16.2    +      -       +      +
    223C  ASP*     1.3    73.1    -      -       -      +
    225C  TRP*     1.3    60.0    +      -       -      +
    227C  LYS*     3.3    10.4    +      -       +      +
    228C  PHE*     2.8    34.9    +      -       -      +
    290C  LEU*     6.2     0.9    -      -       +      -
    292C  LEU*     3.8    33.9    -      -       +      -
    296C  GLN*     3.7    27.8    -      -       +      +
    299C  ASN*     3.9     6.1    -      -       +      +
    300C  ALA*     3.8    14.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with TRP 225 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    220C  LEU*     4.0     9.4    -      -       +      -
    221C  ASP      3.0    18.1    +      -       -      +
    222C  ILE*     3.5    29.4    -      -       +      +
    224C  LEU*     1.3    74.5    -      -       -      +
    226C  ASP*     1.3    73.0    +      -       -      +
    228C  PHE*     4.3     3.6    -      +       -      -
    229C  SER*     2.8    54.6    +      -       -      -
    300C  ALA*     3.5    29.6    -      -       -      +
    301C  GLY*     5.0     0.7    -      -       -      -
    398C  LEU*     3.7    27.1    -      -       +      -
    402C  ILE*     3.7    28.0    -      -       +      +
    403C  PRO*     5.2     1.9    -      -       +      +
    405C  SER      4.7     2.4    +      -       -      -
    406C  MET*     3.7    32.1    -      -       +      -
    407C  PRO*     4.2     9.4    -      -       +      -
    410C  ILE*     5.7     2.0    -      -       +      -
    501C  LUF      4.1    23.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 226 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    222C  ILE*     2.9    35.0    +      -       -      +
    223C  ASP*     3.5    18.1    -      -       -      +
    224C  LEU      3.3     0.4    -      -       -      -
    225C  TRP*     1.3    89.6    +      -       -      +
    227C  LYS*     1.3    66.9    +      -       +      +
    229C  SER*     3.2    13.3    +      -       -      -
    230C  GLU*     3.2    18.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 227 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    208C  TYR*     6.5     1.1    -      -       -      -
    210C  THR*     5.3    17.4    +      -       +      -
    212C  ASN*     4.9     4.2    +      -       -      +
    223C  ASP*     3.1    41.9    +      -       -      +
    224C  LEU*     3.8     9.4    -      -       +      +
    226C  ASP*     1.3    80.8    -      -       +      +
    228C  PHE*     1.3    64.2    +      -       -      +
    230C  GLU*     3.2     9.1    +      -       -      +
    231C  LEU*     3.0    28.4    +      -       +      +
    290C  LEU*     4.2    26.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 228 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    224C  LEU      2.8    21.2    +      -       -      +
    225C  TRP*     3.9     4.7    -      +       -      +
    227C  LYS*     1.3    68.6    -      -       -      +
    229C  SER*     1.3    66.8    +      -       -      +
    230C  GLU      2.9     6.3    +      -       -      -
    231C  LEU*     3.2    10.8    +      -       -      +
    232C  SER*     2.9    43.5    +      -       -      -
    286C  PHE*     3.5    34.8    -      +       +      -
    290C  LEU*     5.2     1.3    -      -       +      +
    292C  LEU*     5.5     4.5    -      -       +      -
    300C  ALA*     3.6    34.8    -      -       +      -
    302C  PHE*     3.5    30.5    -      +       -      -
    501C  LUF      3.2    50.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 229 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    225C  TRP*     2.8    66.3    +      -       -      -
    226C  ASP*     3.2    10.4    +      -       -      -
    228C  PHE*     1.3    79.3    -      -       -      +
    230C  GLU*     1.3    57.4    +      -       -      +
    232C  SER*     4.2     4.7    -      -       -      -
    233C  THR*     3.2    23.4    +      -       -      -
    407C  PRO*     4.4    15.6    -      -       -      +
    410C  ILE*     3.5    11.5    -      -       -      +
    501C  LUF      6.0     0.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 230 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    226C  ASP*     3.3    18.7    -      -       -      +
    227C  LYS*     3.3     7.2    -      -       -      +
    228C  PHE      2.9     1.2    -      -       -      -
    229C  SER*     1.3    79.2    +      -       -      +
    231C  LEU*     1.3    65.5    +      -       +      +
    232C  SER      3.0     1.3    -      -       -      -
    233C  THR*     2.9    20.1    +      -       -      +
    234C  LYS*     3.5    29.3    +      -       -      +
    407C  PRO*     6.0     0.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 231 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    227C  LYS*     3.0    20.5    +      -       +      +
    228C  PHE*     3.5     8.3    -      -       -      +
    230C  GLU*     1.3    75.1    -      -       -      +
    232C  SER*     1.3    61.0    +      -       -      +
    234C  LYS*     3.2    19.1    +      -       +      +
    235C  CYS      3.1     9.4    +      -       -      -
    286C  PHE*     3.7    36.6    -      -       +      -
    287C  SER*     5.9     0.7    -      -       -      -
    288C  ASP*     3.5    36.1    -      -       +      +
    290C  LEU*     3.3    34.3    -      -       +      -
    501C  LUF      2.8    22.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 232 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    228C  PHE*     2.9    40.1    +      -       -      -
    229C  SER*     3.6     9.6    -      -       -      -
    230C  GLU      3.0     0.4    -      -       -      -
    231C  LEU*     1.3    74.4    -      -       -      +
    233C  THR*     1.3    67.5    +      -       -      +
    235C  CYS*     3.0     9.4    -      -       -      +
    236C  ILE*     3.0    28.0    +      -       -      +
    410C  ILE*     4.0    13.7    -      -       -      -
    501C  LUF      3.5    25.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 233 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    229C  SER      3.2    13.5    +      -       -      -
    230C  GLU*     2.9    12.3    +      -       -      -
    232C  SER*     1.3    78.8    -      -       -      +
    234C  LYS*     1.3    65.2    +      -       +      +
    236C  ILE*     3.4     1.2    +      -       -      -
    237C  ILE*     3.2    28.0    +      -       +      +
    407C  PRO*     4.1    11.4    -      -       +      +
    408C  PRO*     6.1     2.5    -      -       +      -
    409C  LEU*     3.8    33.5    -      -       +      +
    410C  ILE*     4.0    14.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 234 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    230C  GLU*     3.5    30.5    +      -       -      +
    231C  LEU*     3.2    19.0    +      -       +      +
    232C  SER      3.1     0.8    -      -       -      -
    233C  THR*     1.3    78.5    -      -       +      +
    235C  CYS*     1.3    53.7    +      -       -      +
    237C  ILE*     2.9    16.4    +      -       +      +
    238C  LYS*     2.8    40.7    +      -       +      +
    287C  SER*     6.6     0.4    -      -       -      -
    501C  LUF      5.7     1.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with CYS 235 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    199C  PHE*     5.3     2.0    -      -       -      -
    231C  LEU      3.1     4.9    +      -       -      -
    232C  SER*     3.0    11.7    -      -       -      +
    234C  LYS*     1.3    77.3    -      -       -      +
    236C  ILE*     1.3    57.3    -      -       +      +
    238C  LYS*     3.2    10.5    +      -       -      +
    239C  THR*     2.9    32.0    +      -       -      -
    269C  LEU*     3.8    16.3    -      -       +      +
    272C  ARG*     4.2     4.2    +      -       -      -
    501C  LUF      1.5    89.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 236 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    232C  SER*     3.0    17.3    +      -       -      +
    233C  THR*     3.8     4.5    -      -       -      +
    234C  LYS      3.2     0.2    -      -       -      -
    235C  CYS*     1.3    80.2    -      -       -      +
    237C  ILE*     1.3    57.0    +      -       -      +
    239C  THR*     3.0     9.0    +      -       -      -
    240C  VAL*     2.9    34.5    +      -       +      +
    265C  CYS*     4.1    10.8    -      -       -      -
    269C  LEU*     3.9    23.1    -      -       +      -
    409C  LEU*     4.0    18.4    -      -       +      -
    410C  ILE*     3.9    35.2    -      -       +      +
    413C  MET*     3.8    39.7    -      -       +      -
    414C  LEU*     6.2     0.4    -      -       +      -
    501C  LUF      5.7     1.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 237 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    233C  THR*     3.2    18.5    +      -       +      +
    234C  LYS*     2.9    18.1    +      -       +      +
    236C  ILE*     1.3    77.2    -      -       -      +
    238C  LYS*     1.3    58.7    +      -       +      +
    239C  THR      3.1     0.2    +      -       -      -
    240C  VAL*     3.2     8.9    +      -       -      +
    241C  GLU*     2.8    48.8    +      -       +      +
    409C  LEU*     3.7    18.4    -      -       +      -
   1438D  LEU*     3.9    26.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 238 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    197C  GLU      4.3    13.3    +      -       -      -
    198C  THR*     3.4    35.5    +      -       -      +
    199C  PHE*     6.0     0.2    -      -       +      -
    200C  PRO*     6.1     2.2    -      -       -      +
    234C  LYS*     2.8    23.9    +      -       +      +
    235C  CYS*     3.2    10.7    +      -       -      +
    237C  ILE*     1.3    76.1    -      -       -      +
    239C  THR*     1.3    57.3    +      -       -      +
    241C  GLU*     3.3    23.9    +      -       -      +
    242C  PHE*     2.8    29.3    +      -       -      +
    272C  ARG*     3.8     5.6    -      -       -      +
    287C  SER*     6.0     3.1    -      -       -      +
    501C  LUF      6.4     0.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 239 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    235C  CYS      2.9    14.7    +      -       -      -
    236C  ILE*     3.0    12.3    +      -       -      +
    238C  LYS*     1.3    74.5    -      -       -      +
    240C  VAL*     1.3    62.7    +      -       -      +
    242C  PHE*     3.2     9.0    -      -       +      +
    243C  ALA*     2.9    26.5    +      -       -      +
    261C  LEU*     4.4    11.0    -      -       +      -
    265C  CYS*     3.9    22.2    -      -       +      -
    268C  ILE*     4.2    25.7    -      -       +      +
    269C  LEU*     3.3    16.3    -      -       -      +
    272C  ARG*     3.4    16.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 240 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    236C  ILE*     2.9    28.4    +      -       +      +
    237C  ILE*     3.5     8.5    -      -       -      +
    239C  THR*     1.3    75.1    -      -       -      +
    241C  GLU*     1.3    68.3    +      -       +      +
    243C  ALA*     3.2     7.5    +      -       -      +
    244C  LYS*     2.9    27.2    +      -       +      +
    261C  LEU*     4.4    20.4    -      -       +      -
    265C  CYS*     6.1     0.2    -      -       -      -
    409C  LEU*     6.2     0.2    -      -       +      -
    413C  MET*     5.6     4.0    -      -       +      -
   1435D  LEU*     5.3     6.7    -      -       +      +
   1438D  LEU*     4.0    32.8    -      -       +      +
   1439D  LEU*     3.9    27.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 241 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    198C  THR*     3.9    13.3    -      -       +      +
    237C  ILE*     2.8    38.5    +      -       +      +
    238C  LYS*     3.3    31.9    +      -       -      +
    240C  VAL*     1.3    80.5    -      -       +      +
    242C  PHE*     1.3    64.0    +      -       -      +
    244C  LYS*     3.2    21.6    +      -       -      +
    245C  GLN*     3.4    16.6    +      -       -      +
   1438D  LEU*     5.7     2.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 242 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    191C  VAL      4.4     2.0    -      -       -      -
    194C  ALA*     3.6    28.3    -      -       +      -
    195C  HIS*     3.6    28.7    -      -       +      -
    198C  THR*     3.4    15.3    -      -       -      +
    238C  LYS      2.8    17.7    +      -       -      +
    239C  THR*     3.2    13.9    -      -       -      +
    241C  GLU*     1.3    70.5    -      -       -      +
    243C  ALA*     1.3    69.6    +      -       +      +
    245C  GLN*     3.1    18.3    +      -       -      +
    246C  LEU*     3.6    32.8    +      -       +      +
    268C  ILE*     4.8    12.1    -      -       +      -
    272C  ARG*     3.8    10.5    -      -       -      +
    327C  GLY*     3.5    26.0    -      -       -      -
    330C  SER*     3.9    22.4    -      -       -      -
    331C  ALA*     4.4     1.8    -      -       -      -
    334C  LEU*     4.9     3.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 243 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    239C  THR      2.9    16.7    +      -       -      +
    240C  VAL*     3.4     8.5    -      -       -      +
    242C  PHE*     1.3    74.4    -      -       -      +
    244C  LYS*     1.3    57.9    +      -       -      +
    246C  LEU*     2.8    29.0    +      -       -      +
    249C  PHE*     3.5    28.4    -      -       +      +
    261C  LEU*     4.1    11.9    -      -       +      -
    334C  LEU*     3.7    30.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 244 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    240C  VAL*     2.9    24.9    +      -       +      +
    241C  GLU*     3.2    15.2    +      -       -      +
    243C  ALA*     1.3    72.2    -      -       -      +
    245C  GLN*     1.3    59.8    +      -       +      +
    246C  LEU      3.2     4.5    +      -       -      +
    249C  PHE*     4.0     9.9    -      -       +      -
    250C  THR*     3.6    31.4    +      -       +      +
    257C  GLN*     5.1     0.9    -      -       -      +
   1438D  LEU      2.9    25.6    +      -       -      +
   1439D  LEU*     3.6    41.7    +      -       +      +
   1441D  GLU      3.8    18.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 245 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    190C  LYS*     4.6    12.6    +      -       -      +
    193C  LYS*     4.4    10.1    -      -       -      +
    194C  ALA*     3.5    33.5    -      -       +      +
    197C  GLU*     3.2    27.1    +      -       -      +
    198C  THR*     4.0    19.3    -      -       -      +
    241C  GLU*     3.4     9.0    +      -       -      +
    242C  PHE      3.1    11.0    +      -       -      +
    243C  ALA      2.8     1.0    +      -       -      -
    244C  LYS*     1.3    78.5    -      -       +      +
    246C  LEU*     1.3    60.1    +      -       -      +
    247C  PRO*     3.8     5.9    -      -       -      +
----------------------------------------------------------
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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