Contacts of the helix formed by residues 238 - 260 (chain C) in PDB entry 5H1C


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 LEU 238 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    273B  VAL*     4.9     1.6    -      -       +      -
    232C  TYR*     4.6     0.8    -      -       -      +
    234C  GLY*     4.2     6.8    -      -       -      -
    235C  ARG*     3.5    36.3    -      -       +      +
    237C  GLU*     1.3    75.1    -      -       -      +
    239C  SER*     1.3    54.7    +      -       -      +
    240C  ALA      3.0     0.7    -      -       -      -
    241C  ARG*     2.7    46.3    +      -       -      +
    242C  GLN*     2.7    22.3    +      -       -      +
      6D    T      3.4    50.0    -      -       +      +
      7D    T      3.7    39.5    -      -       +      +
      8D    T      4.8     6.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 239 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    236C  GLY      5.3     0.3    -      -       -      -
    237C  GLU      2.2    27.3    +      -       -      -
    238C  LEU*     1.3    71.2    -      -       -      +
    240C  ALA*     1.3    56.1    +      -       -      +
    242C  GLN*     4.5     1.1    -      -       -      +
    243C  MET*     3.2    23.9    +      -       -      +
      5D    T      4.0    17.9    -      -       -      -
      6D    T      3.5    32.6    +      -       -      +
      4E    A      5.1     1.8    -      -       -      -
      5E    A      4.5    14.6    +      -       -      -
      6E    A      5.2     6.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 240 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    232C  TYR*     4.9    14.3    -      -       +      -
    237C  GLU*     3.4    15.3    +      -       +      +
    238C  LEU      3.0     0.4    -      -       -      -
    239C  SER*     1.3    82.7    +      -       -      +
    241C  ARG*     1.3    59.3    +      -       -      +
    243C  MET*     3.1    15.8    +      -       -      +
    244C  HIS*     2.9    28.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 241 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    228C  TYR*     3.3    40.7    -      -       +      +
    229C  ARG*     5.3     1.7    -      -       -      +
    232C  TYR*     3.5    37.9    +      -       +      -
    238C  LEU*     2.7    29.3    +      -       -      +
    240C  ALA*     1.3    79.6    -      -       -      +
    242C  GLN*     1.3    85.2    +      -       -      +
    244C  HIS*     3.1     4.3    +      -       -      +
    245C  LEU*     2.9    36.6    +      -       +      +
    287C  ILE*     4.1    11.3    -      -       -      +
    288C  GLY*     3.8    18.8    -      -       -      +
      7D    T      3.5     5.1    +      -       -      -
      8D    T      3.2    36.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 242 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    238C  LEU      2.7    17.8    +      -       -      +
    239C  SER      4.5     1.1    -      -       -      +
    241C  ARG*     1.3   103.8    -      -       -      +
    243C  MET*     1.3    57.1    +      -       -      +
    245C  LEU*     3.8     7.3    -      -       -      +
    246C  ALA*     3.0    33.1    +      -       -      +
    288C  GLY*     2.9    24.5    +      -       -      +
    291C  ILE*     3.3    26.3    -      -       +      +
      6D    T      2.8    20.4    -      -       -      +
      7D    T      2.0    54.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 243 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    233B  SER*     3.4    47.4    -      -       -      +
    234B  GLY      5.3     4.3    -      -       -      +
    239C  SER      3.2    18.1    +      -       -      +
    240C  ALA*     3.1    19.5    -      -       -      +
    241C  ARG      3.1     0.2    -      -       -      -
    242C  GLN*     1.3    80.7    -      -       -      +
    244C  HIS*     1.3    58.1    +      -       -      +
    246C  ALA*     4.0     4.8    +      -       -      +
    247C  ARG*     3.8    32.5    +      -       -      +
      6D    T      5.8     2.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with HIS 244 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    197C  THR      3.8    15.9    -      -       -      -
    198C  ASP*     3.6    22.0    +      -       -      -
    201C  THR*     3.8    24.3    -      -       +      +
    228C  TYR*     2.7    38.4    +      +       +      -
    232C  TYR*     4.5    13.2    -      -       -      +
    240C  ALA      2.9    11.6    +      -       -      +
    241C  ARG*     3.1     7.8    +      -       -      +
    243C  MET*     1.3    77.9    -      -       -      +
    245C  LEU*     1.3    67.0    +      -       -      +
    246C  ALA      3.2     1.6    -      -       -      -
    247C  ARG*     3.1    12.5    +      -       +      +
    248C  PHE*     3.0    22.8    +      +       +      +
----------------------------------------------------------
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Residues in contact with LEU 245 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    224C  ALA*     4.8     3.1    -      -       +      +
    225C  THR*     5.3     9.9    -      -       +      -
    228C  TYR*     3.4    40.8    -      -       +      +
    241C  ARG*     2.9    45.3    +      -       +      +
    242C  GLN*     3.3    12.3    +      -       -      +
    244C  HIS*     1.3    77.5    -      -       -      +
    246C  ALA*     1.3    62.8    +      -       -      +
    248C  PHE*     3.1    13.4    +      -       +      +
    249C  LEU*     2.9    40.4    +      -       +      +
    287C  ILE*     5.8     0.2    -      -       +      -
    288C  GLY*     4.4    13.9    -      -       -      -
    291C  ILE*     5.1     4.3    -      -       +      -
    292C  ILE*     4.6    11.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 246 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    229B  ARG*     5.1     6.7    -      -       +      +
    230B  THR*     3.4    36.7    -      -       +      +
    242C  GLN      3.0    17.0    +      -       -      +
    243C  MET*     4.2     6.7    -      -       -      +
    244C  HIS      3.2     0.2    -      -       -      -
    245C  LEU*     1.3    76.8    -      -       -      +
    247C  ARG*     1.3    58.7    +      -       +      +
    249C  LEU*     3.6     3.1    +      -       -      +
    250C  ARG*     3.0    22.5    +      -       -      +
    291C  ILE*     4.0    24.6    -      -       +      +
      6D    T      5.8     1.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 247 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    230B  THR      4.1    18.2    +      -       -      +
    231B  ASP      5.3     3.0    +      -       -      -
    233B  SER*     2.3    41.6    +      -       -      +
    237B  GLU*     5.4     2.2    +      -       -      -
    243C  MET*     3.8    24.3    +      -       -      +
    244C  HIS*     3.1    13.2    +      -       +      +
    246C  ALA*     1.3    74.2    -      -       +      +
    248C  PHE*     1.3    67.0    +      -       -      +
    250C  ARG*     3.2     7.7    +      -       -      +
    251C  MET*     2.9    31.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 248 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    160C  ILE*     6.4     0.4    -      -       +      -
    200C  GLN*     3.9    39.3    -      -       +      -
    201C  THR*     5.2     7.0    -      -       +      -
    204C  LEU*     3.6    32.5    -      -       +      -
    221C  VAL*     5.0    11.0    -      -       +      -
    224C  ALA*     3.8    26.7    -      -       +      -
    228C  TYR*     4.3    11.2    -      +       -      +
    244C  HIS*     3.0    14.8    +      -       +      +
    245C  LEU*     3.4    17.7    -      -       +      +
    247C  ARG*     1.3    76.9    -      -       -      +
    249C  LEU*     1.3    73.6    +      -       +      +
    251C  MET*     3.0     9.9    +      -       -      +
    252C  LEU*     3.0    54.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 249 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    122C  ILE*     4.3     5.5    -      -       +      +
    245C  LEU*     2.9    25.8    +      -       +      +
    246C  ALA*     4.0     3.1    -      -       -      +
    248C  PHE*     1.3    87.8    -      -       +      +
    250C  ARG*     1.3    67.4    +      -       -      +
    252C  LEU*     3.1    18.4    +      -       +      +
    253C  LEU*     2.9    27.3    +      -       -      +
    265C  ILE*     4.3    18.6    -      -       +      -
    291C  ILE*     3.8    30.3    -      -       +      +
    292C  ILE*     3.8    27.4    -      -       +      -
    295C  ALA*     4.1    18.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 250 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    195B  PHE*     3.1    26.7    +      -       -      +
    196B  ASN*     4.2    10.5    +      -       -      +
    227B  LEU*     3.5    23.8    -      -       -      +
    230B  THR*     3.0    38.7    +      -       +      +
    231B  ASP*     3.0    28.6    +      -       -      -
     54C  TYR      4.6     5.3    +      -       -      -
     56C  PRO*     4.7     6.5    -      -       -      +
    246C  ALA      3.0    19.1    +      -       -      +
    247C  ARG*     3.2     6.9    +      -       -      +
    249C  LEU*     1.3    76.3    -      -       -      +
    251C  MET*     1.3    63.4    +      -       +      +
    253C  LEU*     3.1    16.3    +      -       +      +
    254C  ARG*     2.9    35.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with MET 251 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     59C  GLU*     5.8     0.2    -      -       -      +
    204C  LEU*     3.8    26.9    -      -       +      -
    205C  TYR*     4.5    30.1    -      -       +      +
    208C  SER*     6.4     2.2    -      -       -      -
    247C  ARG*     2.9    21.6    +      -       +      +
    248C  PHE*     3.4     7.6    -      -       -      +
    250C  ARG*     1.3    77.4    -      -       -      +
    252C  LEU*     1.3    62.8    +      -       -      +
    254C  ARG*     2.8    72.4    +      -       +      +
    255C  LEU*     3.0    22.9    +      -       +      +
----------------------------------------------------------
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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
----------------------------------------------------------
    122C  ILE*     4.0    11.7    -      -       +      -
    204C  LEU*     3.8    28.5    -      -       +      -
    219C  LEU*     4.7     6.7    -      -       +      -
    221C  VAL*     5.6     9.2    -      -       +      -
    248C  PHE*     3.0    46.3    +      -       +      +
    249C  LEU*     3.1    21.5    +      -       +      +
    251C  MET*     1.3    75.8    -      -       -      +
    253C  LEU*     1.3    59.8    +      -       -      +
    255C  LEU*     3.3    11.2    +      -       +      +
    256C  ALA*     2.9    29.9    +      -       -      +
    263C  VAL*     4.3    26.1    -      -       +      +
    265C  ILE*     4.4    11.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 253 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    163B  GLU*     5.4    17.7    -      -       +      +
    193B  ARG*     5.5     2.7    -      -       -      +
    120C  GLY      6.0     0.9    -      -       -      +
    121C  SER*     6.1     1.1    -      -       -      -
    122C  ILE*     3.9    24.0    -      -       +      -
    249C  LEU      2.9    18.2    +      -       -      +
    250C  ARG*     3.1    18.4    +      -       +      +
    252C  LEU*     1.3    75.0    -      -       -      +
    254C  ARG*     1.3    58.9    +      -       -      +
    256C  ALA*     4.4     3.8    -      -       +      +
    257C  ASP*     2.9    56.1    +      -       -      +
    295C  ALA*     5.1    17.5    -      -       +      +
    297C  THR*     5.8     6.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 254 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45C  GLY      6.1     0.4    -      -       -      -
     46C  PHE*     3.2    30.6    -      -       -      -
     51C  ALA*     5.0    14.3    +      -       +      -
     54C  TYR*     5.2    14.3    +      -       +      -
     55C  ALA*     5.1     1.5    -      -       -      +
     56C  PRO*     4.4    12.3    -      -       -      +
     59C  GLU*     2.9    31.9    +      -       -      -
    205C  TYR*     5.0     5.1    +      -       -      -
    208C  SER*     6.6     0.2    -      -       -      -
    250C  ARG*     2.9    21.3    +      -       +      +
    251C  MET*     2.8    51.6    +      -       -      +
    253C  LEU*     1.3    76.9    -      -       -      +
    255C  LEU*     1.3    61.6    +      -       +      +
    257C  ASP*     4.6     1.7    -      -       -      +
    258C  GLU*     3.0    48.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 255 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    204C  LEU*     4.4    22.2    -      -       +      +
    207C  ALA*     4.7     9.6    -      -       +      -
    208C  SER*     3.9    31.4    -      -       -      -
    211C  MET*     4.7    12.8    -      -       +      -
    219C  LEU*     3.5    32.5    -      -       +      -
    251C  MET*     3.0    21.7    +      -       +      +
    252C  LEU*     3.8     8.1    -      -       +      +
    254C  ARG*     1.3    84.6    -      -       +      +
    256C  ALA*     1.3    60.2    +      -       -      +
    258C  GLU*     3.1    13.2    +      -       -      +
    259C  PHE*     3.0    35.2    +      -       +      +
    260C  GLY      4.7     0.8    -      -       -      +
    263C  VAL*     6.1     0.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 256 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    120C  GLY*     3.3    36.7    -      -       -      +
    121C  SER*     4.2     2.5    -      -       -      +
    122C  ILE*     5.2     2.2    -      -       +      -
    252C  LEU      2.9    17.8    +      -       -      +
    253C  LEU*     4.2     5.6    -      -       +      +
    255C  LEU*     1.3    78.5    -      -       -      +
    257C  ASP*     1.3    62.7    +      -       -      +
    258C  GLU      3.1     1.1    +      -       -      -
    260C  GLY      3.6    18.9    +      -       -      +
    263C  VAL*     3.4    26.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 257 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    163B  GLU      5.5     0.3    -      -       -      +
    193B  ARG*     2.6    31.8    +      -       -      -
    195B  PHE*     3.5    23.0    -      -       +      -
     50C  GLU*     5.2     0.3    -      -       -      +
     54C  TYR*     4.6    11.4    +      -       +      -
    120C  GLY      4.1    10.0    -      -       -      +
    253C  LEU*     2.9    44.7    +      -       -      +
    254C  ARG*     4.6     3.3    -      -       -      +
    256C  ALA*     1.3    78.6    -      -       -      +
    258C  GLU*     1.3    63.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 258 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     22C  PRO*     4.7     5.9    -      -       -      +
     48C  THR*     3.9     4.5    +      -       -      -
     50C  GLU*     4.2    16.0    -      -       -      +
     51C  ALA*     3.1    39.3    -      -       -      +
     54C  TYR*     4.0    21.2    -      -       +      -
    254C  ARG*     3.0    30.9    -      -       -      +
    255C  LEU*     3.1     9.0    +      -       -      +
    257C  ASP*     1.3    83.7    -      -       -      +
    259C  PHE*     1.3   100.6    +      -       +      +
    260C  GLY      3.5     2.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 259 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     22C  PRO*     3.6    32.3    -      -       +      -
     48C  THR*     3.4    31.4    -      -       +      -
     50C  GLU*     4.7     1.6    -      -       +      -
    208C  SER*     5.1     3.8    -      -       -      -
    211C  MET*     3.4    59.9    -      -       +      -
    212C  VAL*     6.0     0.2    -      -       -      -
    215C  ARG*     5.7     8.9    +      -       -      +
    255C  LEU*     3.0    15.9    +      -       +      +
    258C  GLU*     1.3   113.9    -      -       +      +
    260C  GLY*     1.3    68.2    +      -       -      +
    261C  VAL*     2.9    13.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 260 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    119C  THR*     4.2     5.2    -      -       -      -
    120C  GLY*     3.5    27.6    +      -       -      -
    255C  LEU      4.7     0.5    -      -       -      +
    256C  ALA*     3.6    15.6    +      -       -      -
    258C  GLU      3.5     4.2    +      -       -      -
    259C  PHE*     1.3    77.7    -      -       -      +
    261C  VAL*     1.3    69.3    +      -       -      +
    262C  ALA*     3.1     6.7    +      -       -      -
    263C  VAL*     5.6     0.2    -      -       -      +
----------------------------------------------------------
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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