Contacts of the helix formed by residues 57 - 80 (chain f) in PDB entry 5GJQ


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 PHE 57 (chain f).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      4f  PRO      3.7    11.0    -      -       -      -
      5f  TYR*     4.1     4.7    -      +       -      -
      6f  VAL*     3.2    47.6    -      -       +      +
      8f  ASN*     3.5     4.3    -      -       -      -
     55f  SER      4.2     0.4    -      -       -      -
     56f  GLY*     1.3    70.5    -      -       -      -
     58f  HIS*     1.3    66.2    +      -       -      +
     59f  GLY*     3.3    12.4    +      -       -      -
     60f  ASP*     3.2    40.4    +      -       -      +
     61f  CYS*     2.9    21.1    +      -       -      -
    105f  TYR*     2.8    33.7    +      -       +      +
    100g  ARG*     3.2    28.3    -      -       -      -
    128g  LEU*     3.5    26.5    -      -       +      -
    130g  VAL*     3.8     9.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with HIS 58 (chain f). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8f  ASN*     2.6    27.8    +      -       +      +
     29f  LEU*     3.6    35.2    -      -       +      +
     40f  SER*     4.0    18.1    +      -       -      -
     41f  PRO      5.8     0.4    -      -       -      -
     42f  LYS*     5.4     9.1    -      -       +      +
     44f  TYR*     4.2    13.0    -      -       -      -
     54f  CYS      5.8     0.4    +      -       -      -
     56f  GLY      3.4     2.5    +      -       -      -
     57f  PHE*     1.3    71.8    -      -       -      +
     59f  GLY*     1.3    58.0    +      -       -      +
     61f  CYS*     3.1    14.0    +      -       +      +
     62f  LEU*     2.9    64.6    +      -       +      +
    130g  VAL*     4.3    13.0    -      -       +      -
    131g  ALA      4.0    10.2    +      -       -      -
    132g  TYR*     5.5     0.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 59 (chain f). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     57f  PHE*     3.2    21.3    -      -       -      -
     58f  HIS*     1.3    79.4    -      -       -      +
     60f  ASP*     1.3    57.4    +      -       -      +
     62f  LEU*     3.4     3.0    +      -       -      +
     63f  THR*     2.9    31.9    +      -       -      -
     94g  ARG*     4.0     1.2    +      -       -      -
     97g  TYR*     3.8     8.5    -      -       -      -
    128g  LEU      4.3     1.6    -      -       -      -
    129g  GLY      3.7    25.1    -      -       -      +
    130g  VAL*     4.0     2.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 60 (chain f). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      5f  TYR*     3.7     1.2    -      -       -      -
     57f  PHE*     3.2    29.3    +      -       +      +
     59f  GLY*     1.3    74.0    -      -       -      +
     61f  CYS*     1.3    59.5    +      -       -      +
     63f  THR*     3.8     2.6    -      -       -      -
     64f  LEU*     2.9    32.2    +      -       -      +
     99f  ARG*     4.5     0.9    +      -       -      -
    103f  PRO      3.6     3.4    -      -       -      +
    104f  TYR*     3.4    18.0    -      -       +      -
    105f  TYR      3.0    21.1    +      -       -      +
    106f  VAL*     3.8    15.7    -      -       +      -
     97g  TYR*     3.0    14.7    +      -       -      -
    100g  ARG*     3.0    32.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with CYS 61 (chain f). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     44f  TYR*     5.1     4.5    -      -       -      +
     54f  CYS*     3.8    42.5    -      -       +      -
     55f  SER      4.1    10.1    -      -       -      -
     56f  GLY      4.2     1.3    -      -       -      -
     57f  PHE      2.9    24.0    +      -       -      -
     58f  HIS*     3.1    24.2    +      -       +      +
     60f  ASP*     1.3    75.3    -      -       -      +
     62f  LEU*     1.3    59.8    +      -       -      +
     64f  LEU*     3.6     3.5    -      -       -      +
     65f  THR*     2.8    33.1    +      -       -      -
    106f  VAL*     3.9    15.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 62 (chain f). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     44f  TYR*     4.1    18.6    -      -       +      +
     58f  HIS*     2.9    43.2    +      -       +      +
     59f  GLY      3.8     4.0    -      -       -      +
     61f  CYS*     1.3    73.5    -      -       -      +
     63f  THR*     1.3    67.7    +      -       -      +
     65f  THR*     3.1     8.7    +      -       +      +
     66f  LYS*     3.0    27.8    +      -       +      +
     93g  THR*     5.0     0.9    -      -       +      -
     94g  ARG*     4.0    15.9    -      -       -      +
    129g  GLY      4.4     6.1    -      -       -      +
    131g  ALA*     3.6    37.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with THR 63 (chain f). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     97G  PHE*     4.6     9.1    -      -       +      -
     59f  GLY      2.9    14.0    +      -       -      -
     60f  ASP      3.8     3.1    -      -       -      -
     62f  LEU*     1.3    78.3    -      -       -      +
     64f  LEU*     1.3    64.3    +      -       -      +
     66f  LYS*     3.2     5.3    +      -       -      +
     67f  ILE*     3.0    40.5    +      -       +      +
     99f  ARG*     5.2     0.4    -      -       -      +
    104f  TYR*     4.2     5.4    -      -       +      +
     94g  ARG*     2.3    35.4    +      -       -      +
     97g  TYR*     2.9    41.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 64 (chain f). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     54f  CYS*     4.8     4.0    -      -       -      -
     60f  ASP      2.9    19.1    +      -       -      +
     61f  CYS      3.6     3.8    -      -       -      +
     63f  THR*     1.3    77.0    -      -       -      +
     65f  THR*     1.3    63.3    +      -       -      +
     67f  ILE*     3.2     5.2    +      -       +      +
     68f  ILE*     3.0    38.0    +      -       +      +
     92f  LEU*     4.2     9.2    -      -       +      -
     95f  ILE*     4.0    26.5    -      -       +      -
     96f  LEU*     4.1    18.6    -      -       +      -
    104f  TYR*     4.1    18.2    -      -       +      +
    106f  VAL*     3.8    15.7    -      -       +      -
    108f  ASN*     3.6    36.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 65 (chain f). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     44f  TYR*     3.8    49.0    -      -       +      +
     46f  LEU*     5.6     3.6    -      -       +      +
     52f  ILE*     5.1     3.1    -      -       -      +
     54f  CYS*     4.2     9.3    -      -       -      -
     61f  CYS      2.8    19.3    +      -       -      -
     62f  LEU*     3.1     9.8    +      -       +      +
     64f  LEU*     1.3    76.2    -      -       -      +
     66f  LYS*     1.3    61.6    +      -       +      +
     68f  ILE*     3.2     9.7    +      -       -      +
     69f  GLU*     3.0    45.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 66 (chain f). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     96G  ARG      3.6     8.3    -      -       -      -
     97G  PHE*     2.7    51.8    +      -       +      +
    100G  ASP*     4.0    21.6    -      -       -      +
     62f  LEU*     3.0    16.9    +      -       +      +
     63f  THR*     3.8     4.7    -      -       -      +
     65f  THR*     1.3    79.0    -      -       +      +
     67f  ILE*     1.3    64.0    +      -       -      +
     69f  GLU*     3.3    19.5    +      -       -      +
     70f  ALA*     3.0    23.7    +      -       -      +
     90g  SER*     3.6    18.4    +      -       -      +
     94g  ARG*     4.2    26.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 67 (chain f). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     97G  PHE*     3.9    16.8    -      -       +      -
     63f  THR*     3.0    26.9    +      -       +      +
     64f  LEU*     3.5     9.2    -      -       -      +
     66f  LYS*     1.3    75.1    -      -       -      +
     68f  ILE*     1.3    64.5    +      -       -      +
     70f  ALA*     3.4     6.6    +      -       -      +
     71f  ARG*     3.0    31.0    +      -       +      +
     95f  ILE*     4.1    31.0    -      -       +      -
    104f  TYR*     3.2    28.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 68 (chain f). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46f  LEU*     3.9    32.5    -      -       +      -
     52f  ILE*     3.8    21.3    -      -       +      -
     54f  CYS*     5.9     0.2    -      -       -      -
     64f  LEU*     3.0    27.1    +      -       +      +
     65f  THR*     3.6     7.9    -      -       -      +
     67f  ILE*     1.3    75.0    -      -       +      +
     69f  GLU*     1.3    66.6    +      -       -      +
     71f  ARG*     3.2     5.0    +      -       -      +
     72f  LEU*     3.1    29.6    +      -       +      +
     88f  ILE*     4.9     4.3    -      -       +      -
     91f  MET*     4.8     8.5    -      -       +      +
     92f  LEU*     3.6    30.1    -      -       +      -
     95f  ILE*     4.2    19.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 69 (chain f). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     96G  ARG*     5.4     6.8    -      -       -      +
    100G  ASP*     4.8    10.1    -      -       -      +
     46f  LEU*     5.4     7.9    -      -       +      -
     65f  THR*     3.0    33.2    +      -       +      +
     66f  LYS*     3.5    20.9    -      -       -      +
     68f  ILE*     1.3    76.0    -      -       -      +
     70f  ALA*     1.3    63.3    +      -       -      +
     72f  LEU*     3.1    21.6    +      -       -      +
     73f  LYS*     3.2    26.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 70 (chain f). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     93G  LEU*     3.9    28.8    -      -       +      +
     97G  PHE*     5.3     8.5    -      -       +      -
     66f  LYS      3.0     9.4    +      -       -      +
     67f  ILE*     3.6    11.0    -      -       -      +
     69f  GLU*     1.3    80.3    -      -       -      +
     71f  ARG*     1.3    60.4    +      -       +      +
     73f  LYS*     3.3     5.4    +      -       -      +
     74f  MET*     3.0    38.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 71 (chain f). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    102F  THR*     3.8     8.7    +      -       -      +
    103F  TYR*     2.3    39.4    +      -       -      -
     67f  ILE*     3.0    23.6    +      -       +      +
     68f  ILE      4.0     2.5    -      -       -      +
     70f  ALA*     1.3    77.9    -      -       +      +
     72f  LEU*     1.3    64.8    +      -       -      +
     74f  MET*     3.5    32.0    +      -       +      +
     75f  TYR*     3.2    21.0    +      -       -      +
     91f  MET*     3.5    39.4    -      -       +      +
     94f  THR*     4.2     6.5    +      -       -      -
     95f  ILE*     3.9    21.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 72 (chain f). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46f  LEU*     3.8    47.8    -      -       +      +
     47f  THR*     4.4     6.7    -      -       +      -
     68f  ILE*     3.1    24.1    +      -       +      +
     69f  GLU*     3.4    10.5    -      -       -      +
     71f  ARG*     1.3    78.2    -      -       -      +
     73f  LYS*     1.3    63.4    +      -       +      +
     75f  TYR*     3.3     5.4    +      -       -      +
     76f  LYS*     3.1    25.1    +      -       -      +
     83f  MET*     3.4    36.2    -      -       +      +
     88f  ILE*     3.5    20.2    -      -       +      -
     91f  MET*     5.0     2.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 73 (chain f). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     67G  ASP*     3.9     8.8    +      -       -      +
     68G  ASN*     3.9    22.1    -      -       -      +
     93G  LEU*     4.2    21.7    -      -       +      +
     96G  ARG*     3.1    40.6    -      -       -      +
     69f  GLU*     3.2    20.2    +      -       -      +
     70f  ALA      3.7     6.5    -      -       -      +
     72f  LEU*     1.3    78.7    -      -       +      +
     74f  MET*     1.3    59.0    +      -       -      +
     76f  LYS*     3.6     9.0    -      -       +      +
     77f  HIS*     3.0    39.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with MET 74 (chain f). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    103F  TYR*     6.0     0.4    -      -       -      +
     90G  GLN*     4.9    13.0    -      -       -      +
     93G  LEU*     3.9    17.3    -      -       +      -
     70f  ALA*     3.0    24.6    +      -       -      +
     71f  ARG*     3.6    38.6    -      -       +      +
     72f  LEU      3.2     0.2    -      -       -      -
     73f  LYS*     1.3    74.7    -      -       -      +
     75f  TYR*     1.3    62.6    +      -       -      +
     77f  HIS*     3.5    10.7    +      -       +      +
     78f  SER*     3.1    24.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 75 (chain f). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99F  HIS*     3.8    17.7    -      +       -      -
    103F  TYR*     4.1    29.8    +      +       -      +
    105F  GLU*     2.7    35.5    +      -       -      -
     71f  ARG      3.2    10.8    +      -       -      +
     72f  LEU      3.6     8.1    -      -       -      +
     73f  LYS      3.3     0.2    -      -       -      -
     74f  MET*     1.3    76.9    -      -       -      +
     76f  LYS*     1.3    61.8    +      -       -      +
     78f  SER*     4.6     1.1    -      -       -      -
     79f  ASN*     2.7    58.4    +      -       +      +
     81f  LYS*     3.7    30.9    +      -       +      -
     82f  ALA*     4.0     4.9    +      -       -      -
     83f  MET*     3.3    46.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 76 (chain f). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65G  HIS*     3.7    31.1    +      -       +      +
     72f  LEU      3.1    13.9    +      -       -      +
     73f  LYS*     3.6    13.5    -      -       +      +
     74f  MET      3.2     0.2    -      -       -      -
     75f  TYR*     1.3    75.3    -      -       -      +
     77f  HIS*     1.3    63.4    +      -       -      +
     80f  ASN*     2.7    52.8    +      -       -      +
     81f  LYS*     3.3    24.2    -      -       -      +
     82f  ALA*     4.6     7.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with HIS 77 (chain f). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    114F  GLN*     4.8     6.4    +      -       -      +
     65G  HIS*     3.5    27.1    +      +       -      +
     66G  VAL      3.0    29.6    +      -       -      -
     67G  ASP*     5.2     0.4    -      -       -      -
     89G  ARG*     3.1    68.3    +      -       +      +
     93G  LEU*     5.0     9.7    -      -       +      +
     73f  LYS*     3.0    24.2    +      -       +      +
     74f  MET*     3.7    12.1    -      -       +      +
     76f  LYS*     1.3    81.2    +      -       +      +
     78f  SER*     1.3    62.3    +      -       -      +
     80f  ASN*     4.1    13.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 78 (chain f). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99F  HIS*     6.2     0.3    -      -       -      -
    111F  SER*     2.5    35.0    +      -       -      -
    114F  GLN*     3.9    21.2    +      -       -      +
     89G  ARG*     5.8     0.7    -      -       -      +
     74f  MET      3.1    16.0    +      -       -      -
     75f  TYR*     4.6     0.7    -      -       -      -
     76f  LYS      3.2     0.4    -      -       -      -
     77f  HIS*     1.3    80.5    -      -       -      +
     79f  ASN*     1.3    64.8    +      -       -      +
     80f  ASN*     4.6     3.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 79 (chain f). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99F  HIS*     3.8    19.9    +      -       -      -
    108F  THR*     3.8    17.7    +      -       -      +
    110F  GLU*     5.5     1.2    -      -       -      +
    111F  SER*     3.0    20.2    +      -       -      -
     75f  TYR*     2.7    59.5    +      -       +      +
     78f  SER*     1.3    89.7    +      -       -      +
     80f  ASN*     1.3    74.9    +      -       -      +
     81f  LYS*     3.1    26.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 80 (chain f). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    110F  GLU*     4.3    23.5    +      -       -      +
    114F  GLN*     5.9     3.2    -      -       -      +
    149F  LYS*     6.0     3.8    -      -       -      +
     61G  LYS*     4.2    18.1    +      -       -      +
     76f  LYS*     2.7    36.8    +      -       -      +
     77f  HIS*     4.1    12.0    +      -       -      +
     78f  SER      4.6     2.6    +      -       -      -
     79f  ASN*     1.3    77.5    +      -       -      +
     81f  LYS*     1.3    57.4    +      -       -      +
----------------------------------------------------------
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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