Contacts of the helix formed by residues 241 - 262 (chain L) in PDB entry 3FKS


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 ALA 241 (chain L).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     77L  LEU      3.8     4.3    -      -       -      +
     78L  PHE*     3.6    31.8    +      -       -      +
     79L  GLY      4.0    11.2    -      -       -      +
    240L  GLU*     1.3    78.5    -      -       -      +
    242L  ALA*     1.3    66.5    +      -       -      +
    243L  PRO*     3.3    12.6    -      -       +      -
    244L  LEU*     3.0    22.9    +      -       +      +
    245L  GLN*     3.3     6.2    +      -       -      +
    287O  THR*     5.1     2.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 242 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    240L  GLU      3.6     1.6    +      -       -      -
    241L  ALA*     1.3    69.9    -      -       -      +
    243L  PRO*     1.3    72.7    -      -       +      +
    245L  GLN*     3.0    10.6    +      -       -      +
    246L  TYR*     2.9    19.6    +      -       -      +
    279L  ALA*     3.7    15.6    -      -       +      +
    282L  GLN*     3.4    36.3    -      -       +      +
    283L  LEU*     3.5    18.2    -      -       +      -
    287O  THR*     4.1     9.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with PRO 243 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     39L  GLY*     5.4     2.0    -      -       -      +
     64L  MET*     6.1     0.4    -      -       -      -
     76L  VAL*     3.8    30.3    -      -       +      -
     77L  LEU      3.2    25.6    -      -       -      +
     78L  PHE*     4.0    17.3    -      -       +      -
    241L  ALA*     3.4     5.4    -      -       +      -
    242L  ALA*     1.3    96.6    -      -       +      +
    244L  LEU*     1.3    54.4    +      -       -      +
    246L  TYR*     3.1     9.4    +      -       +      +
    247L  LEU*     2.8    39.1    +      -       +      +
    283L  LEU*     3.6    14.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 244 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     78L  PHE*     3.3    49.8    -      -       +      +
    111L  ASP*     5.3     6.1    -      -       -      +
    112L  ALA*     3.2    29.3    -      -       +      +
    113L  LEU*     4.1    18.4    -      -       +      +
    236L  ALA*     4.0     2.5    -      -       +      -
    240L  GLU*     3.4    39.5    -      -       +      +
    241L  ALA*     3.0    14.1    +      -       +      +
    243L  PRO*     1.3    75.9    -      -       -      +
    245L  GLN*     1.3    60.0    +      -       -      +
    247L  LEU*     4.7     0.9    -      -       +      -
    248L  ALA*     2.9    27.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 245 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    208L  VAL*     3.7    17.2    -      -       +      +
    209L  GLY*     4.4    12.0    +      -       -      -
    236L  ALA*     3.7    24.9    -      -       +      +
    237L  THR      3.4    18.0    +      -       -      +
    238L  ALA*     3.7    16.0    +      -       -      +
    240L  GLU      3.6    13.6    +      -       -      +
    241L  ALA      3.3     8.5    +      -       -      +
    242L  ALA*     3.0     9.9    +      -       -      +
    244L  LEU*     1.3    76.3    -      -       +      +
    246L  TYR*     1.3    57.5    +      -       -      +
    249L  PRO*     3.2    22.3    -      -       -      +
    275L  LYS      3.8     9.7    -      -       -      +
    276L  GLN*     3.8     4.9    -      -       -      +
    279L  ALA*     3.3    25.0    -      -       +      +
    286O  ALA*     5.4     9.8    -      -       -      +
    287O  THR*     4.6     9.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 246 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     52L  GLU*     4.6     5.7    +      -       -      -
     64L  MET*     5.0    13.5    -      -       +      -
     66L  LEU*     5.2     8.4    -      -       +      +
    132L  GLN*     3.3    15.8    +      -       -      -
    242L  ALA      2.9    11.8    +      -       -      +
    243L  PRO*     3.1     9.6    +      -       +      +
    245L  GLN*     1.3    79.4    -      -       -      +
    247L  LEU*     1.3    87.0    +      -       +      +
    249L  PRO*     3.6     0.2    -      -       -      +
    250L  PHE*     3.4    20.7    -      +       -      -
    276L  GLN*     3.6    14.1    +      -       -      -
    279L  ALA*     4.6     1.5    -      -       -      +
    280L  TYR*     3.6    42.2    -      +       +      +
    283L  LEU*     4.1    24.0    -      -       +      -
    303L  LEU*     3.6    22.2    -      -       +      -
    306L  ARG*     3.3    21.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 247 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     64L  MET*     4.3    12.3    -      -       +      -
     78L  PHE*     3.7    24.5    -      -       +      -
     97L  VAL*     3.4    34.3    -      -       +      -
    112L  ALA*     4.5     6.3    -      -       +      -
    113L  LEU*     4.2     9.2    -      -       +      -
    131L  ALA*     4.8     6.5    -      -       +      -
    243L  PRO*     2.8    26.8    +      -       +      +
    244L  LEU*     4.1     3.6    -      -       -      +
    246L  TYR*     1.3   103.9    -      -       +      +
    248L  ALA*     1.3    67.2    +      -       -      +
    250L  PHE*     2.8     9.3    +      -       +      -
    251L  THR*     2.8    39.3    +      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 248 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    112L  ALA*     3.9     9.6    -      -       +      +
    206L  VAL*     4.2     7.0    -      -       +      -
    208L  VAL*     3.8    11.7    -      -       +      -
    234L  VAL*     4.4     4.5    -      -       +      +
    236L  ALA*     3.4    24.9    -      -       +      +
    244L  LEU      2.9    17.5    +      -       -      +
    245L  GLN      3.9     1.1    -      -       -      +
    247L  LEU*     1.3    75.0    -      -       -      +
    249L  PRO*     1.3    71.7    -      -       +      +
    251L  THR*     3.2     6.4    +      -       -      -
    252L  ALA*     3.0    29.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with PRO 249 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    206L  VAL*     4.2     6.5    -      -       +      -
    208L  VAL*     3.7    17.3    -      -       +      -
    245L  GLN      3.2    15.5    -      -       -      +
    246L  TYR      3.6     4.0    -      -       -      +
    247L  LEU      3.5     3.4    -      -       -      -
    248L  ALA*     1.3    92.3    -      -       +      +
    250L  PHE*     1.3    59.1    +      -       -      +
    252L  ALA*     3.9     0.3    -      -       -      +
    253L  ALA      3.2    14.9    +      -       -      -
    270L  TYR*     3.2    29.1    -      -       +      -
    273L  LEU*     4.4     3.8    -      -       +      -
    276L  GLN*     3.3    33.7    -      -       +      +
    307L  LEU*     3.5    21.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 250 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    131L  ALA*     3.7    16.3    -      -       +      +
    132L  GLN*     3.2    33.0    -      -       -      +
    246L  TYR*     3.4    27.8    -      +       -      -
    247L  LEU*     2.8    10.9    +      -       +      +
    249L  PRO*     1.3    77.7    -      -       -      +
    251L  THR*     1.3    61.5    -      -       -      +
    253L  ALA*     2.8    25.3    +      -       -      +
    254L  SER      3.3     3.6    +      -       -      -
    276L  GLN*     3.8     8.3    -      -       -      -
    303L  LEU*     3.5    44.9    -      -       +      -
    306L  ARG*     3.6    28.0    -      -       +      -
    307L  LEU*     4.1    18.4    -      -       +      -
    310L  ARG*     3.7    22.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with THR 251 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     97L  VAL*     5.3     1.1    -      -       +      -
     99L  VAL*     3.5    28.2    -      -       +      +
    112L  ALA*     2.8    30.6    +      -       -      +
    131L  ALA*     3.8    25.8    -      -       +      +
    234L  VAL*     4.5     3.6    -      -       -      +
    247L  LEU*     2.8    28.3    +      -       +      +
    248L  ALA*     3.2    10.9    +      -       -      -
    250L  PHE*     1.3    72.0    -      -       -      +
    252L  ALA*     1.3    64.4    +      -       -      +
    254L  SER*     3.0    15.9    +      -       -      +
    255L  ILE*     3.1    18.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 252 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    204L  VAL*     3.7    11.6    -      -       +      +
    206L  VAL*     3.4    30.7    -      -       +      -
    234L  VAL*     4.0    19.7    -      -       +      -
    248L  ALA      3.0    19.8    +      -       -      +
    249L  PRO      3.9     2.7    -      -       -      +
    251L  THR*     1.3    77.8    +      -       -      +
    253L  ALA*     1.3    60.9    +      -       -      +
    255L  ILE*     3.4    14.3    +      -       -      +
    256L  GLY*     3.4    15.2    +      -       -      -
    268L  ILE*     4.4     4.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 253 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    249L  PRO      3.2     9.2    +      -       -      +
    250L  PHE      2.8    14.6    +      -       -      +
    252L  ALA*     1.3    76.4    -      -       -      +
    254L  SER*     1.3    57.3    +      -       -      +
    256L  GLY*     3.3     2.3    +      -       -      -
    257L  GLU*     2.9    32.6    +      -       +      +
    268L  ILE*     5.3     1.8    -      -       -      -
    270L  TYR*     3.4    25.4    -      -       -      +
    307L  LEU*     4.1     6.3    -      -       +      +
    310L  ARG*     3.6    24.0    -      -       +      +
    323L  LEU*     4.1     8.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 254 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99L  VAL*     4.3     6.3    -      -       -      -
    101L  VAL*     3.4    22.0    -      -       -      +
    129L  SER*     4.2     9.2    +      -       -      -
    130L  ARG      2.8    27.7    +      -       -      -
    131L  ALA*     4.1     0.9    +      -       -      -
    133L  VAL*     3.6     3.3    -      -       -      +
    250L  PHE      3.3     3.4    +      -       -      -
    251L  THR      3.0    10.0    +      -       -      -
    253L  ALA*     1.3    76.9    -      -       -      +
    255L  ILE*     1.3    66.1    +      -       -      +
    257L  GLU*     3.2    16.9    +      -       -      +
    258L  TRP      3.3     9.7    +      -       -      -
    310L  ARG*     2.9    20.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 255 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99L  VAL*     4.1    11.2    -      -       +      -
    100L  PRO*     3.5    24.9    -      -       +      +
    101L  VAL*     3.9    10.9    -      -       +      +
    102L  GLY      5.3     1.2    +      -       -      -
    105L  LEU*     3.5    25.4    -      -       +      -
    110L  VAL*     6.1     1.6    -      -       +      -
    114L  GLY*     6.2     2.9    -      -       -      -
    204L  VAL*     4.5     6.3    -      -       +      -
    232L  ILE*     3.8    31.9    -      -       +      -
    234L  VAL*     4.4    11.0    -      -       +      -
    251L  THR*     3.1    18.4    -      -       -      +
    252L  ALA*     3.5    15.7    -      -       -      +
    253L  ALA      3.3     0.2    -      -       -      -
    254L  SER*     1.3    78.8    -      -       -      +
    256L  GLY*     1.3    59.4    +      -       -      +
    258L  TRP*     3.7     9.2    -      -       -      +
    259L  PHE*     3.4    16.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 256 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    204L  VAL*     4.1    14.3    -      -       -      +
    252L  ALA      3.4     6.3    +      -       -      -
    253L  ALA      3.3     6.3    +      -       -      -
    254L  SER      3.2     0.2    -      -       -      -
    255L  ILE*     1.3    76.0    -      -       -      +
    257L  GLU*     1.3    64.1    +      -       -      +
    258L  TRP      3.2     2.7    -      -       -      -
    259L  PHE*     3.3    17.8    +      -       -      +
    260L  ARG*     3.3    16.6    +      -       -      +
    266L  ALA*     3.8     7.0    -      -       -      +
    268L  ILE*     5.9     0.4    -      -       -      -
    323L  LEU*     4.1    19.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 257 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    129L  SER*     5.9     0.5    -      -       -      -
    133L  VAL*     3.5    20.0    -      -       -      +
    135L  ALA*     5.6     0.2    -      -       -      -
    253L  ALA      2.9    17.7    +      -       -      +
    254L  SER*     3.2     9.3    +      -       -      +
    256L  GLY*     1.3    76.0    -      -       -      +
    258L  TRP*     1.3    59.3    +      -       -      +
    260L  ARG*     3.2    33.9    +      -       -      +
    261L  ASP*     2.8    43.3    +      -       -      +
    310L  ARG*     2.7    58.5    +      -       +      +
    323L  LEU*     4.1    11.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with TRP 258 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101L  VAL*     3.8    34.3    -      -       +      -
    102L  GLY*     3.9    15.3    -      -       -      +
    103L  PRO*     3.2    40.1    -      -       +      +
    126L  ALA*     4.6    11.4    +      -       +      +
    254L  SER      3.3     5.8    +      -       -      -
    255L  ILE      3.7    12.6    -      -       -      +
    256L  GLY      3.2     0.4    -      -       -      -
    257L  GLU*     1.3    76.9    -      -       -      +
    259L  PHE*     1.3   110.8    +      +       -      +
    261L  ASP*     3.4     4.2    +      -       -      +
    262L  ASN*     3.1    54.6    +      -       +      +
    264L  LYS*     3.9    25.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 259 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    102L  GLY      5.2     2.9    -      -       -      -
    103L  PRO*     5.1     6.5    -      -       +      -
    106L  LEU*     4.0    16.4    -      -       +      -
    202L  TYR*     3.6    42.0    -      +       +      -
    204L  VAL*     4.7     3.1    -      -       +      -
    232L  ILE*     3.9    28.0    -      -       +      -
    255L  ILE      3.4    22.9    -      -       -      -
    256L  GLY*     3.6    13.7    -      -       -      +
    258L  TRP*     1.3   104.9    -      +       +      +
    260L  ARG*     1.3    63.0    +      -       -      +
    262L  ASN      3.1     5.9    +      -       -      -
    264L  LYS*     2.8    46.0    +      -       +      +
    265L  HIS      4.4     0.2    -      -       -      +
    266L  ALA*     3.8    20.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 260 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133L  VAL*     5.2     6.5    -      -       -      +
    134L  LYS      5.7     1.6    +      -       -      -
    136L  PRO*     3.5    27.6    -      -       -      +
    256L  GLY      3.3     5.9    +      -       -      +
    257L  GLU*     3.1    44.4    +      -       -      +
    259L  PHE*     1.3    79.7    -      -       -      +
    261L  ASP*     1.3    93.9    +      -       -      +
    263L  GLY      3.8     1.2    +      -       -      -
    264L  LYS      3.6     8.5    +      -       -      -
    310L  ARG      2.9    28.6    +      -       -      -
    312L  ALA*     4.5     5.6    -      -       -      +
    314L  LEU*     3.2    36.7    -      -       +      +
    318L  GLU      4.7     0.3    -      -       -      +
    321L  GLY*     3.2    15.4    +      -       -      -
    322L  SER*     3.9    25.5    +      -       -      +
    323L  LEU*     4.0    10.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 261 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    257L  GLU*     2.8    28.2    +      -       -      +
    258L  TRP*     4.1     5.1    -      -       -      +
    260L  ARG*     1.3   110.4    +      -       -      +
    262L  ASN*     1.3    64.9    +      -       -      +
    263L  GLY      3.4     3.0    +      -       -      -
    314L  LEU*     3.9    10.3    -      -       -      +
    318L  GLU*     4.1    11.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 262 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    258L  TRP*     3.1    67.4    +      -       +      +
    259L  PHE      3.1     1.9    +      -       -      +
    261L  ASP*     1.3    84.1    -      -       -      +
    263L  GLY*     1.3    61.7    +      -       -      +
    264L  LYS*     2.8    24.0    +      -       +      +
----------------------------------------------------------
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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