Contacts of the helix formed by residues 319 - 341 (chain P) in PDB entry 3H1I


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 ARG 319 (chain P).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    103P  LEU      5.6     0.8    +      -       -      -
    106P  GLY      6.1     0.4    -      -       -      +
    108P  TYR*     5.1     5.1    +      -       -      -
    309P  HIS*     4.8     7.7    +      -       -      -
    310P  LYS      5.8     0.4    -      -       -      +
    311P  SER*     3.0    42.9    -      -       -      +
    313P  GLN*     3.7    13.4    +      -       -      +
    314P  ARG      4.1    12.0    +      -       -      -
    315P  THR      3.5    17.3    +      -       -      +
    316P  MET*     3.0    44.6    +      -       -      +
    317P  THR      3.5     0.6    +      -       -      -
    318P  PHE*     1.3    82.8    -      -       -      +
    320P  PRO*     1.3    71.2    -      -       -      +
    321P  LEU      2.8     4.0    +      -       -      -
    322P  SER*     2.9    27.7    +      -       -      -
    323P  GLN*     2.9    14.5    +      -       -      +
    367P  PHE      5.6     1.6    +      -       -      -
    371P  GLY*     4.7     4.4    -      -       -      -
    374P  GLU*     2.8    24.8    +      -       +      +
     20S  TYR*     3.4     4.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with PRO 320 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    318P  PHE*     3.7     5.8    -      -       -      +
    319P  ARG*     1.3    86.5    -      -       -      +
    321P  LEU*     1.3    73.9    +      -       +      +
    323P  GLN*     3.3    17.4    -      -       +      +
    324P  THR*     3.0    25.3    +      -       -      -
     19S  TRP*     6.2     2.9    -      -       +      -
     20S  TYR*     3.6    24.9    -      -       +      +
     23S  ALA*     4.2    22.4    -      -       +      +
     24S  ALA*     4.2    10.1    -      -       -      -
     47T  LYS*     4.2    23.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 321 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    319P  ARG      2.8     1.4    +      -       -      -
    320P  PRO*     1.3    85.6    -      -       +      +
    322P  SER*     1.3    68.8    +      -       -      +
    324P  THR*     3.2    10.5    +      -       +      +
    325P  LEU*     3.1    17.0    +      -       -      +
    370P  ILE*     3.4    33.9    -      -       +      +
    373P  LEU*     4.9     8.7    -      -       +      -
    374P  GLU*     3.3    16.6    -      -       +      +
    377P  MET*     4.4    23.1    -      -       +      -
     19S  TRP*     5.1    14.6    -      -       +      -
     20S  TYR*     4.1    13.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 322 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    316P  MET*     3.8    16.8    -      -       -      -
    319P  ARG*     2.9    38.1    +      -       -      -
    321P  LEU*     1.3    73.9    -      -       -      +
    323P  GLN*     1.3    65.2    +      -       -      +
    325P  LEU*     2.7    11.4    +      -       -      +
    326P  PHE*     2.7    21.5    +      -       -      +
    367P  PHE*     3.9     8.4    +      -       -      -
    370P  ILE*     3.9     8.8    -      -       -      +
    371P  GLY*     4.7     2.4    -      -       -      -
    374P  GLU*     2.8    27.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 323 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    104P  TYR*     3.0    30.4    +      -       +      -
    316P  MET*     3.1    32.1    +      -       +      +
    317P  THR      3.3    15.2    +      -       -      -
    319P  ARG      2.9     9.2    +      -       -      +
    320P  PRO*     3.3    17.6    -      -       +      +
    322P  SER*     1.3    75.3    -      -       -      +
    324P  THR*     1.3    64.5    +      -       -      +
    326P  PHE*     2.8    27.5    +      -       -      +
    327P  TRP*     3.0    18.8    +      -       +      -
   3007P  PEE      4.2     2.2    +      -       -      -
     44T  GLN*     3.5    17.7    +      -       -      -
     47T  LYS*     3.4    33.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with THR 324 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    320P  PRO      3.0     8.9    +      -       -      -
    321P  LEU*     3.6    14.4    -      -       +      +
    323P  GLN*     1.3    78.8    -      -       -      +
    325P  LEU*     1.3    67.2    +      -       +      +
    327P  TRP*     3.8     1.9    +      -       -      +
    328P  LEU*     3.1    23.5    +      -       +      +
     46T  PHE      4.9     1.9    +      -       -      -
     47T  LYS*     4.0    31.3    +      -       -      +
     50T  PRO*     5.9     1.2    -      -       -      +
     51T  PRO*     4.9     5.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 325 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    321P  LEU      3.1    10.0    +      -       -      +
    322P  SER*     2.7    15.7    +      -       -      +
    324P  THR*     1.3    77.2    -      -       +      +
    326P  PHE*     1.3    63.2    +      -       -      +
    328P  LEU*     2.9    34.1    +      -       +      +
    329P  LEU*     2.9    11.6    +      -       -      +
    362P  ILE*     3.7    21.8    -      -       +      -
    366P  LEU*     3.3    43.5    -      -       +      -
    367P  PHE*     3.8    21.3    -      -       +      +
    370P  ILE*     3.7    24.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 326 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    100P  GLY*     4.1     3.4    -      -       -      -
    103P  LEU*     3.9    28.9    -      -       +      -
    104P  TYR*     3.6    32.3    -      +       +      -
    316P  MET*     3.7    29.8    -      -       +      -
    322P  SER      2.7    13.6    +      -       -      +
    323P  GLN*     2.8     9.6    +      -       -      +
    325P  LEU*     1.3    70.3    -      -       -      +
    327P  TRP*     1.3    85.9    +      +       -      +
    329P  LEU*     2.7    28.0    +      -       +      +
    330P  VAL*     2.9    29.7    +      -       +      +
    367P  PHE*     3.7    11.3    -      -       -      -
   3007P  PEE      3.8    44.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with TRP 327 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    104P  TYR*     4.7     9.1    -      -       -      -
    323P  GLN*     3.0    36.4    +      -       +      +
    324P  THR      4.1     1.6    -      -       -      +
    326P  PHE*     1.3    82.9    -      +       -      +
    328P  LEU*     1.3    67.5    +      -       -      +
    330P  VAL*     3.1    23.2    +      -       +      +
    331P  ALA*     2.9    24.9    +      -       -      +
   3007P  PEE      3.3    93.0    +      -       +      -
     44T  GLN*     5.0     2.0    -      -       -      +
     47T  LYS*     4.0    17.7    -      -       +      +
     48T  VAL*     3.5    24.1    -      -       +      +
     51T  PRO*     3.9    18.1    -      -       +      +
     52T  PHE*     3.9    22.8    -      +       +      -
----------------------------------------------------------
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Residues in contact with LEU 328 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    324P  THR*     3.1    16.6    +      -       +      +
    325P  LEU*     2.9    31.1    +      -       +      +
    327P  TRP*     1.3    77.0    -      -       -      +
    329P  LEU*     1.3    49.9    +      -       -      +
    331P  ALA*     3.3     3.3    +      -       +      +
    332P  ASN*     2.6    35.9    +      -       +      +
    358P  SER*     5.8     2.0    -      -       -      +
    362P  ILE*     4.3    11.9    -      -       +      -
    366P  LEU*     5.7     2.5    -      -       +      -
     51T  PRO*     3.5    28.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 329 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    103P  LEU*     3.8    29.4    -      -       +      -
    325P  LEU      2.9     9.7    +      -       -      +
    326P  PHE*     2.7    21.1    +      -       +      +
    328P  LEU*     1.3    68.7    -      -       -      +
    330P  VAL*     1.3    68.5    +      -       +      +
    332P  ASN*     3.0    17.1    +      -       -      +
    333P  LEU*     3.0    17.3    +      -       +      +
    359P  TYR*     4.1    26.7    -      -       +      +
    362P  ILE*     3.7    32.7    -      -       +      +
    363P  LEU*     3.8    22.2    -      -       +      -
    367P  PHE*     4.3     5.8    -      -       +      -
   3007P  PEE      4.9    13.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 330 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    326P  PHE*     2.9    47.3    +      -       +      +
    327P  TRP*     3.1    17.9    +      -       +      +
    329P  LEU*     1.3    74.8    -      -       +      +
    331P  ALA*     1.3    57.8    +      -       -      +
    333P  LEU*     2.8    34.8    +      -       -      +
    334P  LEU*     2.9    10.8    +      -       +      +
   3007P  PEE      4.0    48.7    -      -       +      +
     52T  PHE*     3.9    20.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 331 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    327P  TRP      2.9    13.4    +      -       -      +
    328P  LEU*     3.5     5.6    -      -       +      +
    330P  VAL*     1.3    80.5    -      -       -      +
    332P  ASN*     1.3    58.1    +      -       -      +
    334P  LEU*     3.0    11.7    +      -       +      +
    335P  ILE*     2.7    37.8    +      -       +      +
     51T  PRO*     4.3    18.2    -      -       +      +
     52T  PHE*     3.4    25.8    -      -       +      -
     55T  ALA*     4.7     7.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 332 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    328P  LEU*     2.6    20.1    +      -       +      +
    329P  LEU*     3.0    16.7    +      -       -      +
    331P  ALA*     1.3    73.3    -      -       -      +
    333P  LEU*     1.3    54.2    +      -       -      +
    335P  ILE*     3.3    12.1    -      -       -      +
    336P  LEU*     3.0    27.3    +      -       -      +
    355P  ALA*     3.1    19.3    +      -       -      +
    358P  SER*     3.0    22.6    +      -       -      +
    359P  TYR*     2.7    48.3    -      -       -      +
    362P  ILE*     3.9     6.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 333 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    277P  PHE*     4.7    20.1    -      -       +      +
    281P  ILE*     6.2     0.4    -      -       +      -
    329P  LEU*     3.0    20.6    +      -       +      +
    330P  VAL*     2.8     9.2    +      -       -      +
    332P  ASN*     1.3    73.0    -      -       -      +
    334P  LEU*     1.3    65.0    +      -       -      +
    335P  ILE      2.8     5.6    +      -       -      -
    336P  LEU*     2.9    12.0    +      -       +      +
    337P  THR*     2.8    27.0    +      -       -      -
    359P  TYR*     3.5    34.8    -      -       +      -
   3007P  PEE      3.5    71.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 334 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    330P  VAL*     2.9     7.2    +      -       +      +
    331P  ALA*     3.3    15.5    -      -       +      +
    333P  LEU*     1.3    76.7    -      -       -      +
    335P  ILE*     1.3    62.3    +      -       +      +
    337P  THR*     3.7     8.0    -      -       +      +
    338P  TRP*     3.5    15.4    +      -       -      +
   3007P  PEE      4.6    39.3    -      -       +      +
     52T  PHE*     4.3    27.6    -      -       +      -
     55T  ALA*     6.0     4.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 335 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    331P  ALA*     2.7    20.4    +      -       +      +
    332P  ASN*     3.3    18.2    -      -       -      +
    333P  LEU      2.8     0.4    +      -       -      -
    334P  LEU*     1.3    75.3    -      -       -      +
    336P  LEU*     1.3    68.7    +      -       -      +
    337P  THR      2.9     1.1    -      -       -      -
    338P  TRP*     2.7    43.5    +      -       +      +
    339P  ILE*     3.1    10.7    +      -       +      +
    351P  ILE*     4.9     7.6    -      -       +      -
    355P  ALA*     4.2    17.3    -      -       +      -
     55T  ALA*     3.6    34.1    -      -       +      -
     58T  LEU*     4.6    16.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 336 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    277P  PHE*     4.2    13.2    -      -       +      +
    280P  ALA*     3.3    25.8    -      -       +      +
    281P  ILE*     3.6    22.4    -      -       +      -
    332P  ASN*     3.0    28.8    +      -       -      +
    333P  LEU*     2.9    17.9    +      -       +      +
    335P  ILE*     1.3    80.6    -      -       -      +
    337P  THR*     1.3    61.8    -      -       -      +
    339P  ILE*     3.4     6.9    +      -       -      +
    340P  GLY      3.1    16.8    +      -       -      -
    352P  GLY*     4.8     2.7    -      -       -      +
    355P  ALA*     3.6    27.4    -      -       +      +
    356P  SER*     3.6    27.8    -      -       -      +
    359P  TYR*     4.1    12.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 337 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    273P  TRP*     4.8     6.9    +      -       +      +
    276P  LEU*     3.9    21.5    -      -       +      +
    277P  PHE*     3.7    28.6    +      -       -      +
    333P  LEU      2.8    13.9    +      -       -      -
    334P  LEU*     3.7    13.7    -      -       +      +
    335P  ILE      2.8     0.6    +      -       -      -
    336P  LEU*     1.3    73.4    -      -       -      +
    338P  TRP*     1.3    72.3    +      -       -      +
    340P  GLY*     2.8    13.9    +      -       -      -
    341P  SER*     3.2     7.0    +      -       -      -
   3007P  PEE      3.9    20.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with TRP 338 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    334P  LEU      3.5     9.0    +      -       -      +
    335P  ILE*     2.7    24.7    +      -       +      +
    337P  THR*     1.3    76.9    -      -       -      +
    339P  ILE*     1.3    84.9    +      -       +      +
    341P  SER*     2.6    43.0    +      -       -      -
    342P  GLN*     3.3    26.4    +      -       +      +
    348P  PHE*     3.4    28.0    -      +       -      -
    351P  ILE*     4.0    19.3    -      -       +      -
     58T  LEU*     3.6    27.4    -      -       +      -
     59T  TYR*     2.9    55.9    -      +       +      -
     62T  GLY*     4.4     1.8    -      -       -      -
     63T  THR*     4.0     4.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 339 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    280P  ALA*     4.6     8.7    -      -       +      +
    283P  ARG*     2.7    32.4    +      -       -      +
    284P  SER*     5.7     1.6    -      -       -      +
    335P  ILE*     3.1    15.2    +      -       +      +
    336P  LEU*     3.4    10.8    -      -       -      +
    338P  TRP*     1.3   113.4    -      -       +      +
    340P  GLY*     1.3    51.7    +      -       -      +
    342P  GLN*     2.6    29.7    +      -       -      +
    348P  PHE*     3.9    37.0    -      -       +      +
    349P  ILE*     5.8     0.9    -      -       -      -
    351P  ILE*     3.9    10.8    -      -       +      -
    352P  GLY*     4.2    19.5    -      -       -      -
    355P  ALA*     5.7     0.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 340 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    270P  LYS*     3.5     8.8    -      -       -      +
    276P  LEU*     4.2    13.9    -      -       -      -
    279P  TYR*     3.4    36.9    -      -       -      -
    280P  ALA*     4.2     4.7    -      -       -      +
    283P  ARG*     3.8     8.7    +      -       -      -
    336P  LEU      3.1     6.8    +      -       -      -
    337P  THR      2.8    15.7    +      -       -      -
    339P  ILE*     1.3    75.3    -      -       -      +
    341P  SER*     1.3    55.5    +      -       -      -
    342P  GLN      3.0     5.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 341 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    270P  LYS*     3.9    21.9    -      -       -      +
    276P  LEU*     4.1    19.8    -      -       -      +
    337P  THR*     3.2     3.7    +      -       -      -
    338P  TRP*     2.6    27.0    +      -       -      -
    340P  GLY*     1.3    70.1    -      -       -      -
    342P  GLN*     1.3    73.7    +      -       -      -
    343P  PRO*     4.2     0.7    -      -       -      +
----------------------------------------------------------
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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