Contacts of the helix formed by residues 60 - 83 (chain D) in PDB entry 3LOC


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 SER 60 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     40D  LEU*     4.8     4.3    -      -       -      -
     54D  LEU*     5.6     0.2    -      -       -      +
     55D  LEU*     4.3     4.7    -      -       -      -
     58D  PHE      2.9     7.5    +      -       -      +
     59D  PRO*     1.3    83.4    -      -       -      +
     61D  LYS*     1.3    59.3    +      -       -      +
     62D  GLU*     3.5    11.5    +      -       -      +
     63D  ALA*     3.0    22.2    +      -       -      +
     64D  LEU*     3.0    25.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 61 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     30D  PHE*     3.9    16.7    -      -       +      -
     35D  PHE*     2.7    58.6    +      -       +      +
     36D  HIS*     3.9    11.9    +      -       -      +
     38D  THR*     3.3    22.6    +      -       +      +
     39D  ARG*     5.4     1.1    -      -       -      +
     40D  LEU*     3.5    39.1    -      -       +      +
     60D  SER*     1.3    70.7    -      -       -      +
     62D  GLU*     1.3    66.8    +      -       -      +
     64D  LEU*     3.2     2.8    +      -       -      +
     65D  TYR*     2.9    26.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 62 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     35D  PHE*     3.8    15.7    -      -       +      -
     60D  SER*     3.3     9.3    +      -       -      +
     61D  LYS*     1.3    79.4    -      -       -      +
     63D  ALA*     1.3    61.6    +      -       -      +
     65D  TYR*     3.7     1.7    -      -       -      +
     66D  ILE*     3.0    45.3    +      -       +      +
    124D  LEU*     3.8    28.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 63 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     58D  PHE*     4.4     4.7    -      -       +      -
     59D  PRO*     3.8    26.7    -      -       +      -
     60D  SER*     3.0    22.9    +      -       -      +
     62D  GLU*     1.3    78.1    -      -       -      +
     64D  LEU*     1.3    57.1    +      -       -      +
     66D  ILE*     3.3    10.6    +      -       -      +
     67D  ALA*     2.8    30.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 64 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     22D  ILE*     4.1     6.3    -      -       +      -
     23D  LEU*     3.7    20.2    -      -       +      -
     26D  ALA*     3.7    28.5    -      -       +      -
     30D  PHE*     4.3     3.6    -      -       +      -
     40D  LEU*     4.5     3.4    -      -       +      -
     43D  ILE*     4.0    11.9    -      -       +      -
     54D  LEU*     4.0    37.2    -      -       +      -
     58D  PHE*     3.6    36.9    -      -       +      +
     60D  SER      3.0    12.3    +      -       -      +
     61D  LYS*     3.2     6.0    +      -       -      +
     63D  ALA*     1.3    75.5    -      -       -      +
     65D  TYR*     1.3    57.5    +      -       -      +
     67D  ALA*     3.1     5.4    +      -       -      +
     68D  VAL*     2.9    30.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 65 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     30D  PHE*     3.6    39.6    -      +       +      -
     35D  PHE*     3.7    36.5    -      +       +      +
     61D  LYS      2.9    17.1    +      -       -      +
     62D  GLU      3.7     2.2    -      -       -      +
     64D  LEU*     1.3    77.4    -      -       -      +
     66D  ILE*     1.3    65.3    +      -       +      +
     68D  VAL*     3.2     4.0    +      -       -      +
     69D  LEU*     3.0    40.7    +      -       +      +
    113D  LEU*     4.3    27.6    +      -       +      +
    116D  MSE      5.8     0.7    -      -       -      +
    117D  GLU*     2.6    47.6    +      -       -      +
    124D  LEU*     4.2    21.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 66 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     62D  GLU*     3.0    43.2    +      -       +      +
     63D  ALA*     3.6     8.3    -      -       -      +
     65D  TYR*     1.3    73.7    -      -       +      +
     67D  ALA*     1.3    69.8    +      -       -      +
     69D  LEU*     3.2     2.5    +      -       -      +
     70D  ARG*     2.8    25.4    +      -       +      +
    124D  LEU*     3.7    33.4    -      -       +      +
    125D  LEU*     4.5    13.8    -      -       +      +
    128D  GLU*     4.5    22.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 67 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     23D  LEU*     3.7    19.8    -      -       +      +
     58D  PHE*     3.7    20.2    -      -       +      -
     63D  ALA      2.8    14.2    +      -       -      +
     64D  LEU      3.1     9.4    +      -       -      +
     66D  ILE*     1.3    78.8    -      -       -      +
     68D  VAL*     1.3    63.4    +      -       -      +
     70D  ARG*     3.3     6.9    +      -       -      +
     71D  GLN*     3.1    25.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 68 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     23D  LEU*     3.8    20.0    -      -       +      +
     26D  ALA*     3.6    30.3    -      -       +      -
     27D  LEU*     4.1    25.1    -      -       +      +
     30D  PHE*     4.4     4.3    -      -       +      -
     64D  LEU      2.9    19.1    +      -       -      +
     65D  TYR*     3.6     9.0    -      -       -      +
     66D  ILE      3.2     0.4    -      -       -      -
     67D  ALA*     1.3    78.1    -      -       -      +
     69D  LEU*     1.3    63.6    +      -       -      +
     71D  GLN*     3.3    22.1    +      -       -      +
     72D  ILE*     3.5    11.4    +      -       +      +
    113D  LEU*     3.8    26.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 69 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65D  TYR*     3.0    47.7    +      -       +      +
     68D  VAL*     1.3    75.6    -      -       -      +
     70D  ARG*     1.3    63.0    +      -       -      +
     72D  ILE*     3.3    25.2    +      -       +      +
     73D  LEU*     3.1    26.6    +      -       -      +
    113D  LEU*     4.0    17.3    -      -       +      -
    114D  PHE*     3.7    30.0    -      -       +      +
    117D  GLU*     3.8    21.5    -      -       +      -
    125D  LEU*     3.7    31.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 70 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     66D  ILE*     2.8    24.6    +      -       +      +
     67D  ALA*     3.3     8.5    +      -       -      +
     69D  LEU*     1.3    69.3    -      -       -      +
     71D  GLN*     1.3    59.6    +      -       -      +
     73D  LEU*     3.3    18.7    +      -       -      +
     74D  ASP*     2.9    61.9    +      -       -      +
     77D  LEU*     5.9     2.2    -      -       -      +
    125D  LEU*     4.9     1.0    -      -       +      +
    128D  GLU*     3.1    31.3    +      -       +      +
    132D  ASP*     4.6    20.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 71 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     20D  LYS*     5.0    13.1    -      -       -      +
     23D  LEU*     3.5    48.3    -      -       +      +
     24D  SER*     5.6     0.4    -      -       -      +
     27D  LEU*     5.6     5.9    -      -       -      +
     67D  ALA      3.1    13.1    +      -       -      +
     68D  VAL*     3.4    15.0    -      -       -      +
     69D  LEU      3.3     0.2    -      -       -      -
     70D  ARG*     1.3    76.3    -      -       -      +
     72D  ILE*     1.3    63.3    +      -       +      +
     74D  ASP*     3.1     9.5    +      -       -      +
     75D  ILE*     3.1    35.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 72 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     27D  LEU*     5.2     1.6    -      -       +      -
     68D  VAL*     3.5    24.0    +      -       +      +
     69D  LEU*     3.3    29.3    +      -       +      +
     71D  GLN*     1.3    76.7    -      -       +      +
     73D  LEU*     1.3    58.4    +      -       -      +
     75D  ILE*     3.3    10.8    +      -       +      +
     76D  TRP*     2.8    68.8    +      -       +      +
    103D  VAL*     5.8     2.7    -      -       +      -
    107D  TYR*     6.2     0.4    -      -       +      -
    110D  ALA*     3.2    52.5    -      -       +      +
    111D  SER      4.6     0.2    -      -       -      +
    113D  LEU*     4.8     1.8    -      -       +      -
    114D  PHE*     4.6     2.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 73 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    178C  GLN*     4.8     1.1    -      -       -      +
     69D  LEU      3.1    17.5    +      -       -      +
     70D  ARG*     3.5    28.7    -      -       -      +
     72D  ILE*     1.3    80.2    -      -       -      +
     74D  ASP*     1.3    64.2    +      -       -      +
     76D  TRP*     3.0     5.6    +      -       +      -
     77D  LEU*     2.9    37.9    +      -       +      +
    114D  PHE*     3.6    27.6    -      -       +      -
    125D  LEU*     4.6    12.3    -      -       +      -
    128D  GLU*     4.8     8.1    -      -       +      +
    129D  LEU*     4.7     7.9    -      -       +      -
    133D  LEU*     4.6    15.3    -      -       +      -
    212D  URA      3.5    32.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 74 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     70D  ARG*     2.9    58.6    +      -       -      +
     71D  GLN*     3.1     9.0    +      -       -      +
     73D  LEU*     1.3    74.9    -      -       -      +
     75D  ILE*     1.3    62.1    +      -       +      +
     77D  LEU*     4.9     2.4    -      -       -      +
     78D  ALA*     3.1    25.6    +      -       -      +
     81D  LYS*     3.7    18.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 75 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     71D  GLN*     3.1    32.0    +      -       +      +
     72D  ILE*     3.6     9.6    -      -       +      +
     74D  ASP*     1.3    79.0    -      -       +      +
     76D  TRP*     1.3    63.6    +      -       -      +
     77D  LEU      3.4     0.2    +      -       -      -
     78D  ALA*     3.7     9.2    +      -       -      +
     79D  PRO*     3.7     8.8    -      -       -      +
    103D  VAL*     3.8    35.9    -      -       +      +
    107D  TYR*     4.6    33.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with TRP 76 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    175C  PHE*     5.9     0.2    -      +       -      -
     72D  ILE*     2.8    38.5    +      -       +      +
     73D  LEU*     3.0    11.2    +      -       +      +
     75D  ILE*     1.3    72.7    -      -       -      +
     77D  LEU*     1.3    61.7    +      -       -      +
     79D  PRO*     3.5    10.2    -      -       -      +
     96D  TYR*     4.0     9.2    +      -       -      -
    100D  LYS*     3.2    42.6    +      -       +      +
    103D  VAL*     3.5    31.0    -      -       +      +
    104D  SER*     5.6     2.4    +      -       -      +
    111D  SER*     3.7    27.5    +      -       -      -
    114D  PHE*     3.3    51.1    -      +       +      -
    170D  GLN*     3.6    20.0    -      -       +      +
    212D  URA      3.3    38.8    -      +       +      +
----------------------------------------------------------
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Residues in contact with LEU 77 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     70D  ARG*     5.9     2.2    -      -       -      +
     73D  LEU*     2.9    33.3    +      -       +      +
     74D  ASP*     5.1     2.5    -      -       -      +
     76D  TRP*     1.3    72.6    -      -       -      +
     78D  ALA*     1.3    67.3    +      -       -      +
     79D  PRO*     3.2     4.7    -      -       -      -
     80D  LEU*     2.6    25.5    +      -       +      -
     81D  LYS*     2.7    26.1    +      -       -      +
     96D  TYR*     5.0     0.9    -      -       -      +
    133D  LEU*     3.9    28.3    -      -       +      -
    136D  LEU*     3.8    28.5    -      -       +      -
    137D  ILE*     4.6     3.8    -      -       +      -
    166D  TRP*     4.3     8.5    -      -       +      -
    212D  URA      3.7    26.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 78 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     74D  ASP      3.1    19.1    +      -       -      +
     75D  ILE*     4.0     6.1    -      -       -      +
     77D  LEU*     1.3    73.4    -      -       -      +
     79D  PRO*     1.3    69.8    -      -       +      +
     81D  LYS*     3.1    17.5    +      -       -      +
     82D  ALA*     3.0    22.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with PRO 79 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     75D  ILE      3.7     7.4    -      -       -      +
     76D  TRP      3.5    12.8    -      -       -      +
     77D  LEU      3.2     5.6    -      -       -      -
     78D  ALA*     1.3    94.9    -      -       +      +
     80D  LEU*     1.3    60.8    +      -       -      +
     82D  ALA*     3.1    22.6    +      -       +      +
     83D  PHE*     3.3    16.0    -      -       +      -
     96D  TYR*     3.7    23.6    -      -       +      -
     99D  LEU*     4.3    34.8    -      -       +      -
    100D  LYS*     5.7     1.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 80 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     77D  LEU*     2.6    24.0    +      -       +      +
     79D  PRO*     1.3    73.7    -      -       -      +
     81D  LYS*     1.3    64.0    +      -       -      +
     82D  ALA      3.3     0.3    +      -       -      -
     83D  PHE*     3.3    43.6    +      -       +      +
     96D  TYR*     3.6    40.2    -      -       +      +
    136D  LEU*     5.3     3.4    -      -       +      -
    137D  ILE*     3.7    29.2    -      -       +      -
    140D  LYS*     3.6    28.6    -      -       +      -
    144D  ILE*     5.0     6.5    -      -       +      -
    162D  ILE*     4.5    14.1    -      -       +      -
    166D  TRP*     4.9     0.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 81 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     74D  ASP*     3.7    24.4    +      -       -      +
     77D  LEU*     2.7    22.8    +      -       -      +
     78D  ALA*     3.4    31.1    -      -       -      +
     80D  LEU*     1.3    73.0    -      -       -      +
     82D  ALA*     1.3    52.9    +      -       -      +
     83D  PHE      3.3     0.7    +      -       -      -
     84D  ARG*     2.7    31.7    +      -       -      -
    136D  LEU*     3.7    31.8    -      -       +      +
    140D  LYS*     3.6    12.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 82 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     78D  ALA      3.0    12.2    +      -       -      +
     79D  PRO*     3.2    16.4    -      -       +      +
     80D  LEU      3.1     0.2    -      -       -      -
     81D  LYS*     1.3    74.1    -      -       -      +
     83D  PHE*     1.3    67.3    +      -       +      +
     84D  ARG*     3.5    17.1    +      -       -      +
     87D  PHE*     3.3    18.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 83 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     79D  PRO      3.3    17.5    -      -       -      -
     80D  LEU*     3.5    30.1    -      -       +      +
     81D  LYS      3.2     1.2    -      -       -      -
     82D  ALA*     1.3    75.9    -      -       +      +
     84D  ARG*     1.3    76.6    +      -       -      +
     87D  PHE*     3.7     8.7    -      +       -      -
     92D  ALA*     4.0    41.3    -      -       +      -
     93D  ILE*     4.2    17.0    -      -       +      -
     96D  TYR*     4.1    25.8    -      +       +      -
    140D  LYS*     3.2    25.4    +      -       +      -
    143D  LEU*     4.1    19.5    -      -       +      +
    144D  ILE*     4.6    18.4    -      -       +      -
    147D  TRP*     5.0     7.6    -      +       -      -
----------------------------------------------------------
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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