Contacts of the helix formed by residues 130 - 151 (chain E) in PDB entry 4O9U


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 ASP 130 (chain E).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    500B  NAP      4.3     2.6    -      -       -      -
    120E  ILE*     4.5    13.7    -      -       -      +
    121E  PRO      5.0     1.5    -      -       -      +
    122E  ARG*     3.4    28.6    +      -       -      +
    126E  ALA      2.6    15.4    +      -       -      +
    127E  GLN*     3.3    32.0    +      -       +      +
    128E  SER      3.7     0.2    -      -       -      -
    129E  MET*     1.3    68.7    -      -       -      +
    131E  ALA*     1.3    64.1    +      -       -      +
    132E  LEU*     3.7    20.1    -      -       -      +
    133E  SER*     3.3    32.9    +      -       -      +
    134E  SER*     3.3    12.6    +      -       -      -
    329E  ASN*     4.1     3.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 131 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     94E  PHE*     4.4    19.0    -      -       +      -
    117E  MET*     3.7    33.9    +      -       +      +
    120E  ILE*     5.5     1.6    -      -       -      +
    129E  MET      2.8     6.5    +      -       -      -
    130E  ASP*     1.3    69.8    +      -       -      +
    132E  LEU*     1.3    65.2    +      -       -      +
    133E  SER      3.2     0.7    -      -       -      -
    134E  SER*     2.9    22.3    +      -       -      +
    135E  GLN*     3.1    17.5    +      -       +      +
    326E  TYR*     4.7    11.4    -      -       +      -
    329E  ASN*     3.6     9.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 132 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     94E  PHE*     5.0     9.7    -      -       +      -
    117E  MET      5.1     4.1    +      -       -      +
    118E  GLU*     3.7    37.5    -      -       +      +
    120E  ILE*     4.5    11.4    -      -       +      +
    122E  ARG*     3.3    36.3    -      -       -      +
    130E  ASP*     3.7     7.2    +      -       -      +
    131E  ALA*     1.3    78.7    -      -       -      +
    133E  SER*     1.3    59.3    +      -       -      +
    135E  GLN*     5.1     0.6    -      -       -      +
    136E  ALA*     3.3    26.5    +      -       -      +
    177E  VAL*     3.9     4.6    -      -       -      +
    500E  NAD      3.4    25.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 133 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    338B  PRO*     4.1    19.3    -      -       -      -
    500B  NAP      4.3    14.9    +      -       -      -
    122E  ARG*     4.5     6.1    +      -       -      -
    127E  GLN      5.8     0.2    -      -       -      -
    130E  ASP*     3.3    32.5    +      -       -      -
    131E  ALA      3.2     0.8    -      -       -      -
    132E  LEU*     1.3    77.3    -      -       -      +
    134E  SER*     1.3    57.3    +      -       -      +
    137E  THR*     2.6    35.8    +      -       -      -
    177E  VAL*     3.2    17.2    -      -       -      +
    161F  ALA*     6.5     0.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with SER 134 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    338B  PRO*     5.6     1.1    -      -       -      -
    130E  ASP      3.3     5.2    +      -       -      -
    131E  ALA*     2.9    11.0    +      -       -      -
    133E  SER*     1.3    79.8    -      -       -      +
    135E  GLN*     1.3    83.6    +      -       -      +
    137E  THR*     3.3    17.5    -      -       -      -
    138E  VAL*     3.5    14.0    +      -       -      +
    325E  MET*     3.7    30.7    -      -       -      +
    329E  ASN*     2.9    26.1    +      -       -      -
    162F  ALA*     4.7     4.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 135 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     16E  ARG*     3.7    22.9    +      -       -      +
     94E  PHE*     4.5    18.6    -      -       +      -
    131E  ALA      3.1    15.2    +      -       -      +
    132E  LEU*     5.1     0.7    -      -       -      +
    134E  SER*     1.3    99.1    +      -       -      +
    136E  ALA*     1.3    61.5    +      -       -      +
    137E  THR      3.1     1.8    -      -       -      -
    138E  VAL*     3.3     6.6    +      -       -      +
    139E  ALA*     3.1    25.6    +      -       -      +
    315E  PRO*     3.8    15.5    -      -       +      +
    322E  ALA*     3.3    42.7    +      -       -      +
    325E  MET*     4.2     2.2    -      -       -      +
    326E  TYR*     3.7    23.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 136 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132E  LEU      3.3    20.9    +      -       -      +
    135E  GLN*     1.3    75.0    -      -       -      +
    137E  THR*     1.3    59.3    +      -       -      +
    139E  ALA*     3.9     7.9    -      -       -      -
    140E  GLY*     3.1    22.2    +      -       -      -
    177E  VAL*     3.6    19.5    -      -       +      -
    178E  ALA*     3.2    27.2    -      -       +      +
    284E  LEU*     5.7     0.7    -      -       +      -
    500E  NAD      4.3    10.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 137 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    338B  PRO*     3.5    19.2    -      -       +      +
    133E  SER      2.6    22.7    +      -       -      -
    134E  SER*     3.3    11.0    -      -       -      +
    136E  ALA*     1.3    75.7    -      -       -      +
    138E  VAL*     1.3    65.4    +      -       -      +
    141E  TYR*     3.2     8.5    +      -       -      +
    177E  VAL*     4.0     2.9    -      -       -      +
    181E  MET*     2.9    58.1    -      -       +      +
    325E  MET*     4.6    11.0    -      -       +      -
    154F  PHE*     4.5    14.6    -      -       +      -
    158F  LEU*     5.2     6.5    -      -       +      -
    160F  THR*     5.3     2.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 138 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    134E  SER      3.5    14.8    +      -       -      +
    135E  GLN*     3.3    10.2    +      -       -      +
    137E  THR*     1.3    75.2    -      -       -      +
    139E  ALA*     1.3    62.8    +      -       -      +
    141E  TYR*     3.4     5.7    -      -       -      +
    142E  LEU*     3.3    21.2    +      -       +      +
    314E  LEU      4.4     1.8    -      -       -      +
    315E  PRO*     3.8    20.9    -      -       +      -
    318E  LEU*     3.6    33.2    -      -       +      -
    322E  ALA*     3.9    27.6    -      -       +      -
    325E  MET*     4.3     6.3    -      -       -      -
    154F  PHE*     3.9    23.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 139 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    135E  GLN      3.1    15.7    +      -       -      +
    136E  ALA*     3.9     6.5    -      -       -      +
    138E  VAL*     1.3    74.9    -      -       -      +
    140E  GLY*     1.3    54.7    +      -       -      +
    141E  TYR      3.2     0.2    +      -       -      -
    142E  LEU*     3.3     3.5    +      -       -      +
    143E  ALA*     2.8    34.5    +      -       -      +
    284E  LEU*     3.4    32.9    -      -       +      +
    314E  LEU*     3.6    26.7    -      -       +      +
    315E  PRO*     4.9     4.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 140 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    136E  ALA      3.1    14.0    +      -       -      -
    139E  ALA*     1.3    76.2    -      -       -      +
    141E  TYR*     1.3    63.2    +      -       -      +
    143E  ALA*     3.4    15.9    -      -       -      +
    144E  ALA*     3.4     1.9    +      -       -      +
    178E  ALA*     3.4    29.0    -      -       -      +
    181E  MET*     3.8     8.2    -      -       -      +
    182E  ALA*     3.3    20.8    -      -       -      -
    255E  THR*     6.2     0.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 141 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    137E  THR      3.2    12.9    +      -       -      +
    138E  VAL      3.4     7.9    -      -       -      +
    139E  ALA      3.1     0.6    -      -       -      -
    140E  GLY*     1.3    74.3    -      -       -      +
    142E  LEU*     1.3    77.3    +      -       +      +
    144E  ALA*     2.9    22.3    +      -       -      +
    145E  ILE*     3.1    42.3    +      -       +      +
    181E  MET*     3.6     5.5    -      -       +      +
    185E  THR*     4.2    24.1    +      -       +      +
    318E  LEU*     3.7    40.4    -      -       +      -
    148F  ALA*     3.9     5.8    +      -       -      +
    153F  ARG      3.7     3.2    +      -       -      -
    154F  PHE*     3.4    28.7    -      +       +      -
    155F  PHE*     3.5    31.2    +      -       -      +
    156F  PRO*     4.1    17.0    -      -       +      -
    189F  LEU*     4.9     2.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 142 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    138E  VAL      3.3     6.3    +      -       -      +
    139E  ALA      3.3     6.6    +      -       -      +
    141E  TYR*     1.3    87.0    -      -       +      +
    143E  ALA*     1.3    55.8    +      -       -      +
    145E  ILE*     3.9     8.7    -      -       +      -
    146E  HIS*     2.8    57.1    +      -       +      +
    314E  LEU*     3.3    35.0    -      -       +      +
    317E  GLU*     3.8    17.9    -      -       +      +
    318E  LEU*     3.7    39.9    -      -       +      -
    148F  ALA      4.3     7.0    -      -       -      +
    149F  ARG*     4.1    19.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 143 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    139E  ALA      2.8    18.2    +      -       -      +
    140E  GLY*     3.4    13.9    -      -       -      +
    141E  TYR      3.1     0.2    -      -       -      -
    142E  LEU*     1.3    77.6    -      -       -      +
    144E  ALA*     1.3    59.5    +      -       -      +
    146E  HIS*     4.3     3.1    -      -       -      +
    147E  ALA*     3.4    19.4    +      -       -      +
    182E  ALA*     4.5     2.0    -      -       +      -
    253E  ILE*     4.1    23.4    -      -       +      +
    255E  THR*     6.1     0.7    -      -       +      -
    282E  VAL*     3.8    19.0    -      -       +      +
    284E  LEU*     3.9    17.9    -      -       +      -
    314E  LEU*     5.0     2.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 144 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    140E  GLY      3.4     3.7    +      -       -      +
    141E  TYR      2.9     9.6    +      -       -      +
    143E  ALA*     1.3    77.3    -      -       -      +
    145E  ILE*     1.3    66.9    +      -       -      +
    146E  HIS      3.3     0.4    -      -       -      -
    147E  ALA*     3.1     8.3    +      -       -      +
    148E  ALA*     3.1    22.9    +      -       -      +
    155E  PHE*     4.8     2.9    -      -       +      -
    182E  ALA*     4.0    15.3    -      -       -      +
    185E  THR*     3.6    28.0    -      -       +      -
    186E  ALA*     4.3     8.1    -      -       +      +
    189E  LEU*     4.5     6.8    -      -       +      +
    253E  ILE*     4.5     6.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 145 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    141E  TYR*     3.1    48.1    +      -       +      +
    142E  LEU*     3.1    11.2    +      -       +      +
    144E  ALA*     1.3    77.0    -      -       -      +
    146E  HIS*     1.3    56.7    +      -       -      +
    148E  ALA*     3.3     3.9    +      -       -      -
    149E  ARG*     3.0    26.0    +      -       -      +
    185E  THR*     4.4     4.7    -      -       +      -
    189E  LEU*     5.7     2.7    -      -       +      -
    145F  ILE*     3.5    16.3    -      -       +      +
    148F  ALA*     3.6    10.1    -      -       +      +
    149F  ARG*     3.3    39.5    -      -       +      +
    189F  LEU*     3.7    30.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with HIS 146 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    142E  LEU*     2.8    44.1    +      -       +      +
    143E  ALA*     4.3     4.3    -      -       -      +
    145E  ILE*     1.3    76.5    -      -       -      +
    147E  ALA*     1.3    53.9    +      -       -      +
    149E  ARG*     4.0     8.5    -      -       -      +
    150E  LEU*     2.8    52.0    +      -       +      +
    282E  VAL*     5.7     3.8    -      -       +      -
    309E  TYR*     3.9    33.9    +      +       +      -
    314E  LEU*     4.8     6.3    -      -       +      +
    317E  GLU*     3.0    26.8    +      -       -      -
    149F  ARG*     3.3    47.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 147 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    143E  ALA      3.4    16.4    +      -       -      +
    144E  ALA*     3.1    14.6    +      -       -      +
    146E  HIS*     1.3    80.6    -      -       -      +
    148E  ALA*     1.3    56.7    +      -       -      +
    151E  SER*     2.9    29.6    +      -       -      -
    155E  PHE*     3.2    18.6    -      -       +      -
    251E  VAL*     3.9    21.4    -      -       +      +
    253E  ILE*     4.3     4.7    -      -       +      -
    280E  VAL*     4.6     6.2    -      -       -      +
    282E  VAL*     4.2     9.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 148 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    144E  ALA      3.1     6.1    +      -       -      +
    145E  ILE*     3.9     3.1    -      -       -      +
    147E  ALA*     1.3    74.6    -      -       -      +
    149E  ARG*     1.3    65.3    +      -       -      +
    150E  LEU      3.3     0.4    -      -       -      -
    151E  SER*     3.9    12.0    -      -       -      +
    155E  PHE*     3.6    11.7    -      -       +      -
    189E  LEU*     3.7    30.5    -      -       +      -
    141F  TYR*     4.0    12.1    +      -       -      +
    142F  LEU*     3.9    13.2    -      -       -      +
    145F  ILE*     3.5    26.8    -      -       +      +
    318F  LEU*     4.9     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 149 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    145E  ILE      3.0    17.4    +      -       -      +
    146E  HIS*     3.1    15.2    +      -       -      +
    148E  ALA*     1.3    79.3    -      -       -      +
    150E  LEU*     1.3    82.7    +      -       +      +
    151E  SER      4.6     1.7    -      -       -      +
    142F  LEU*     5.2     5.7    -      -       -      +
    145F  ILE*     3.2    13.8    -      -       +      +
    146F  HIS*     3.2    36.7    +      -       +      -
    149F  ARG*     2.8    54.3    -      -       +      +
    309F  TYR*     4.7     7.7    +      -       -      -
    317F  GLU*     4.7    16.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 150 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    146E  HIS*     2.8    25.9    +      -       +      +
    149E  ARG*     1.3   109.8    -      -       +      +
    151E  SER*     1.3    66.4    +      -       -      +
    152E  PRO*     3.4     2.8    -      -       -      +
    280E  VAL*     4.5    19.4    -      -       +      +
    282E  VAL*     6.3     1.8    -      -       +      -
    300E  VAL*     5.5    15.7    -      -       +      -
    307E  ARG*     3.5    38.7    +      -       +      +
    309E  TYR*     4.2    34.3    -      -       +      -
    149F  ARG*     5.6     0.4    -      -       -      +
    317F  GLU      5.3     0.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 151 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    147E  ALA      2.9    23.1    +      -       -      -
    148E  ALA*     3.9     7.0    -      -       -      +
    149E  ARG      3.6     2.3    -      -       -      +
    150E  LEU*     1.3    77.4    -      -       -      +
    152E  PRO*     1.3    66.2    -      -       -      +
    153E  ARG*     2.9    31.4    +      -       -      +
    155E  PHE*     3.3    20.1    -      -       -      -
    168E  ALA*     4.9     1.0    -      -       -      +
    250E  ASP*     5.5     1.2    -      -       -      +
    251E  VAL*     4.4     4.1    -      -       -      +
    278E  GLY      5.2     0.3    +      -       -      -
    280E  VAL*     3.7    12.3    -      -       -      +
    142F  LEU*     5.2     0.5    -      -       -      +
    317F  GLU      4.4     2.6    -      -       -      +
    318F  LEU*     3.3    14.9    -      -       -      +
----------------------------------------------------------
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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