Contacts of the helix formed by residues 72 - 96 (chain A) in PDB entry 5JRE


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 72 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     15A  LEU*     3.4    36.3    -      -       +      -
     18A  LYS*     4.9     1.3    -      -       +      -
     19A  LYS*     3.7    34.1    -      -       +      -
     22A  ILE*     3.9    15.2    -      -       +      +
     66A  LEU*     3.5     7.3    -      -       -      +
     69A  TYR*     2.9    24.4    +      +       +      +
     71A  MET*     1.3   108.5    -      -       +      +
     73A  TYR*     1.3    65.3    +      -       -      +
     74A  SER      3.2     2.2    -      -       -      -
     75A  ASN*     3.0    37.4    +      -       +      +
     76A  GLY      3.4     7.3    +      -       -      -
    109B  TRP*     3.9    35.0    -      +       -      -
----------------------------------------------------------
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Residues in contact with TYR 73 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     66A  LEU*     3.9    33.4    -      -       +      +
     69A  TYR      3.9     1.0    +      -       -      -
     70A  PRO*     3.1    21.2    +      -       +      +
     71A  MET      3.5     0.4    -      -       -      -
     72A  PHE*     1.3    76.3    -      -       -      +
     74A  SER*     1.3    66.2    +      -       -      +
     76A  GLY*     3.1    12.6    +      -       -      -
     77A  PHE*     3.1    37.6    +      +       -      +
     80A  LEU*     5.9     1.1    -      -       +      -
    107A  ASP*     2.7    36.7    +      -       -      -
    109A  TRP*     5.0     0.7    -      +       -      -
    110A  VAL*     3.6    14.0    +      -       +      +
     70B  PRO*     3.8    24.5    -      -       +      +
     71B  MET*     3.5    44.0    -      -       +      +
     73B  TYR*     5.6     0.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 74 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     71A  MET      4.5     6.8    +      -       -      -
     73A  TYR*     1.3    85.9    -      -       -      +
     75A  ASN*     1.3    69.1    +      -       -      +
     76A  GLY      3.4     0.7    +      -       -      -
     77A  PHE*     3.5    16.8    +      -       -      +
     78A  ILE*     4.8     5.2    +      -       -      +
     74B  SER*     5.8     9.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 75 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     19A  LYS*     3.9    21.0    -      -       +      +
     22A  ILE*     4.0    10.0    -      -       +      +
     23A  VAL*     3.8    29.9    -      -       +      +
     26A  SER*     3.7    17.8    +      -       -      -
     71A  MET      4.4     1.4    +      -       -      -
     72A  PHE*     3.0    42.2    +      -       +      +
     74A  SER*     1.3    83.4    +      -       -      +
     76A  GLY*     1.3    57.5    +      -       -      +
     77A  PHE      3.5     0.2    -      -       -      -
     78A  ILE*     5.2     0.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 76 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     22A  ILE*     3.8    14.6    -      -       -      +
     26A  SER*     3.9     4.2    +      -       -      -
     62A  GLN*     3.8    14.3    +      -       -      -
     66A  LEU*     4.3    11.7    -      -       -      -
     72A  PHE      3.4     3.8    +      -       -      -
     73A  TYR      3.1     7.1    +      -       -      -
     75A  ASN*     1.3    77.7    -      -       -      +
     77A  PHE*     1.3    67.0    +      -       -      +
     78A  ILE      3.4     2.2    +      -       -      -
     79A  GLY*     3.4     2.9    +      -       -      -
     80A  LEU*     3.3    22.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 77 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     66A  LEU*     5.4     0.4    -      -       -      -
     73A  TYR*     3.1    37.1    +      +       -      +
     74A  SER*     3.5    18.4    +      -       -      +
     75A  ASN      3.5     0.2    -      -       -      -
     76A  GLY*     1.3    77.2    -      -       -      +
     78A  ILE*     1.3    64.1    +      -       +      +
     80A  LEU*     3.1     7.2    +      -       -      +
     81A  GLN*     2.9    48.3    +      -       +      +
    109A  TRP*     3.7    17.3    -      +       -      -
    110A  VAL*     3.3    30.0    -      -       +      +
    113A  PHE*     3.7    43.1    -      +       +      -
----------------------------------------------------------
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Residues in contact with ILE 78 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     26A  SER*     4.5     3.8    -      -       -      +
     30A  SER*     5.6     3.6    -      -       -      -
     74A  SER      4.8     3.9    +      -       -      +
     75A  ASN      5.2     0.8    +      -       -      +
     76A  GLY      3.4     0.6    -      -       -      -
     77A  PHE*     1.3    81.0    -      -       +      +
     79A  GLY*     1.3    59.2    +      -       -      +
     81A  GLN*     3.3    18.8    +      -       +      +
     82A  GLU*     2.9    48.5    +      -       +      +
    163F  ARG*     6.0     7.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 79 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     26A  SER*     3.0    39.6    +      -       -      -
     29A  MET*     3.4    23.5    -      -       -      +
     30A  SER*     4.7     1.8    -      -       -      -
     76A  GLY      3.4     1.8    +      -       -      -
     77A  PHE      3.3     0.6    -      -       -      -
     78A  ILE*     1.3    77.8    -      -       -      +
     80A  LEU*     1.3    57.8    +      -       -      +
     82A  GLU*     3.4     6.6    +      -       -      +
     83A  TYR*     3.0    21.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 80 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29A  MET*     3.8    20.4    -      -       +      -
     59A  ALA*     4.3     4.7    -      -       +      +
     62A  GLN*     4.3     9.6    -      -       +      -
     63A  ILE*     3.8    35.2    -      -       +      -
     66A  LEU*     3.6    31.6    -      -       +      -
     73A  TYR*     5.9     1.6    -      -       +      -
     76A  GLY      3.3     8.7    +      -       -      +
     77A  PHE*     3.1     8.5    +      -       -      +
     79A  GLY*     1.3    73.4    -      -       -      +
     81A  GLN*     1.3    65.9    +      -       -      +
     83A  TYR*     3.2    15.1    +      -       +      +
     84A  VAL*     3.0    26.9    +      -       -      +
    106A  VAL*     4.4     4.7    -      -       +      -
    110A  VAL*     4.1    24.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 81 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     77A  PHE*     2.9    37.1    +      -       +      +
     78A  ILE*     3.4    19.8    -      -       -      +
     80A  LEU*     1.3    77.6    -      -       -      +
     82A  GLU*     1.3    60.8    +      -       +      +
     84A  VAL*     3.3     1.6    +      -       -      -
     85A  GLU*     3.1    24.0    +      -       -      +
    110A  VAL*     4.5     9.5    -      -       -      +
    113A  PHE*     3.5    18.6    +      -       -      +
    114A  GLY*     3.6    25.5    -      -       -      +
    117A  ASP*     2.6    28.3    +      -       -      +
    165A  LYS*     3.8    12.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 82 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     30A  SER*     3.3    24.4    +      -       -      +
     33A  SER*     3.0    25.5    +      -       -      +
     34A  LYS*     2.8    34.5    +      -       -      +
     37A  ILE*     5.2     0.2    -      -       -      +
     78A  ILE*     2.9    35.8    +      -       +      +
     79A  GLY      3.8     3.8    -      -       -      +
     80A  LEU      3.2     0.2    -      -       -      -
     81A  GLN*     1.3    76.8    -      -       +      +
     83A  TYR*     1.3    60.4    +      -       -      +
     85A  GLU*     3.6    18.4    -      -       -      +
     86A  ALA*     3.0    24.8    +      -       -      +
    163F  ARG*     5.8     0.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 83 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29A  MET*     3.7    10.8    -      -       +      -
     33A  SER*     3.5     7.8    +      -       -      -
     55A  LEU*     3.8    15.3    -      -       +      -
     56A  THR*     4.1    19.0    -      -       -      +
     59A  ALA*     3.6    30.6    -      -       +      +
     63A  ILE*     4.8     0.7    -      -       +      -
     79A  GLY      3.0    15.1    +      -       -      +
     80A  LEU*     3.2    19.3    +      -       +      +
     82A  GLU*     1.3    74.1    -      -       -      +
     84A  VAL*     1.3    67.4    +      -       +      +
     86A  ALA*     3.4     0.5    +      -       -      +
     87A  LEU*     3.0    57.2    +      -       +      +
    103A  GLU      5.0     0.3    +      -       -      -
    104A  LEU*     2.7    45.3    +      -       +      +
    106A  VAL*     3.8    15.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 84 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     80A  LEU      3.0    18.0    +      -       -      +
     81A  GLN      3.3     6.9    +      -       -      +
     83A  TYR*     1.3    76.0    -      -       +      +
     85A  GLU*     1.3    58.6    +      -       -      +
     87A  LEU*     4.2     0.3    -      -       -      +
     88A  ALA*     2.9    29.6    +      -       -      +
    104A  LEU*     3.9    24.5    -      -       +      +
    106A  VAL*     3.9    22.2    -      -       +      -
    110A  VAL*     3.9    21.8    -      -       +      +
    111A  TYR*     3.9    28.5    -      -       +      +
    114A  GLY*     4.0     3.4    -      -       -      -
    115A  ILE*     4.0    17.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 85 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     37A  ILE*     3.9     9.9    -      -       +      +
     81A  GLN*     3.1    16.8    +      -       -      +
     82A  GLU*     3.6    21.4    -      -       -      +
     84A  VAL*     1.3    77.8    -      -       -      +
     86A  ALA*     1.3    61.6    +      -       -      +
     88A  ALA*     3.7     2.3    -      -       -      +
     89A  LEU*     3.1    22.5    +      -       -      +
    114A  GLY      3.8    14.3    +      -       -      +
    117A  ASP*     3.7    39.3    -      -       +      +
    118A  ILE*     3.9     8.5    -      -       +      +
    121A  GLU*     2.9    40.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 86 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     33A  SER*     3.8    32.8    -      -       -      +
     36A  LEU*     4.0    17.6    -      -       +      +
     37A  ILE*     3.9    15.9    -      -       +      +
     40A  MET*     5.9     0.2    -      -       -      +
     55A  LEU*     4.1     2.2    -      -       +      -
     82A  GLU      3.0    17.7    +      -       -      +
     83A  TYR      3.9     2.5    -      -       -      +
     84A  VAL      3.3     0.2    -      -       -      -
     85A  GLU*     1.3    75.3    -      -       -      +
     87A  LEU*     1.3    61.7    +      -       -      +
     89A  LEU*     3.3     4.3    +      -       -      +
     90A  TYR*     2.9    26.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 87 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     36A  LEU*     4.0    11.2    -      -       +      -
     52A  LYS*     4.5    17.3    -      -       +      -
     55A  LEU*     3.8    18.4    -      -       +      -
     56A  THR*     4.0    15.9    -      -       +      +
     83A  TYR*     3.0    48.9    +      -       +      +
     84A  VAL      4.2     0.4    -      -       -      +
     86A  ALA*     1.3    73.9    -      -       -      +
     88A  ALA*     1.3    61.4    +      -       -      +
     90A  TYR*     3.2     4.6    +      -       +      +
     91A  TYR*     2.9    47.7    +      -       +      -
     99A  PRO*     4.4     0.9    -      -       -      -
    104A  LEU*     3.5    32.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 88 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     84A  VAL*     2.9    19.5    +      -       +      +
     87A  LEU*     1.3    77.5    -      -       -      +
     89A  LEU*     1.3    58.8    +      -       -      +
     91A  TYR      3.5     0.5    +      -       -      -
     92A  TYR*     2.8    29.9    +      -       -      +
     97A  ARG      4.0     3.5    -      -       -      +
     98A  ILE*     4.1     8.2    -      -       +      +
     99A  PRO*     3.6    21.9    -      -       +      +
    115A  ILE*     4.1    14.4    -      -       +      -
    118A  ILE*     3.6    25.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 89 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     37A  ILE*     3.7    43.3    -      -       +      +
     40A  MET*     4.7     3.1    -      -       +      -
     41A  ILE*     4.4     7.2    -      -       +      -
     85A  GLU      3.1    15.1    +      -       -      +
     86A  ALA*     3.6     7.4    -      -       -      +
     87A  LEU      3.3     0.2    -      -       -      -
     88A  ALA*     1.3    72.7    -      -       -      +
     90A  TYR*     1.3    69.0    +      -       -      +
     92A  TYR*     3.2     5.3    +      -       +      +
     93A  ILE*     3.0    50.7    +      -       +      +
    118A  ILE*     4.9     4.2    -      -       +      +
    121A  GLU*     3.9    37.2    -      -       +      +
    122A  ILE*     4.2    17.0    -      -       +      +
    125A  LYS*     4.9     1.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 90 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     36A  LEU*     4.0    16.6    -      -       +      -
     40A  MET*     3.7    40.5    -      -       +      +
     45A  TYR*     5.9     1.3    -      +       -      -
     48A  ALA*     4.7     1.6    -      -       +      -
     49A  ASP*     2.7    28.5    +      -       -      -
     52A  LYS*     3.4    45.2    +      -       +      +
     86A  ALA      2.9    14.8    +      -       -      +
     87A  LEU*     3.3    12.8    -      -       -      +
     89A  LEU*     1.3    76.8    -      -       -      +
     91A  TYR*     1.3    77.5    +      +       -      +
     94A  LYS*     2.9    72.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 91 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     52A  LYS*     3.4    34.9    +      -       -      -
     87A  LEU*     2.9    37.5    +      -       +      +
     90A  TYR*     1.3    87.2    -      +       -      +
     92A  TYR*     1.3    61.5    +      -       -      +
     94A  LYS*     5.6     0.9    -      -       -      -
     95A  GLU*     2.9    51.4    +      -       +      +
     96A  ASN      3.1     6.6    +      -       -      -
     97A  ARG*     3.1    45.8    +      -       +      +
     99A  PRO*     4.0    25.6    -      -       +      -
    103A  GLU*     4.3    12.4    +      -       +      +
    104A  LEU*     5.1     2.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 92 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     88A  ALA      2.8    19.1    +      -       -      +
     89A  LEU*     3.6     9.2    -      -       +      +
     91A  TYR*     1.3    76.0    -      -       -      +
     93A  ILE*     1.3    64.2    +      -       +      +
     96A  ASN*     3.1    31.9    +      -       -      +
     97A  ARG      3.0    15.6    +      -       -      +
     98A  ILE*     4.2    18.2    -      -       +      -
    122A  ILE*     4.0    38.8    -      -       +      -
    125A  LYS*     5.9     0.4    -      -       +      -
    137A  TYR*     3.6    25.7    -      +       -      -
    140A  LYS*     4.2     5.5    +      -       -      +
    141A  ALA*     3.6    16.6    +      -       -      +
    144A  ASP*     2.6    44.8    +      -       +      +
      1B  MET*     4.5     8.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 93 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     40A  MET*     3.8    35.2    -      -       +      +
     41A  ILE*     4.7     0.7    -      -       -      +
     45A  TYR*     3.8    24.0    -      -       +      +
     89A  LEU*     3.0    47.4    +      -       +      +
     92A  TYR*     1.3    79.2    -      -       +      +
     94A  LYS*     1.3    64.0    +      -       -      +
     96A  ASN      4.5     1.0    +      -       -      -
    125A  LYS*     4.0    31.2    -      -       +      -
    137A  TYR*     4.0    20.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 94 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     40A  MET*     4.5     8.3    -      -       +      -
     45A  TYR*     5.5     9.6    -      -       +      -
     49A  ASP*     5.1     1.9    +      -       -      -
     90A  TYR*     2.9    56.9    +      -       +      +
     91A  TYR*     4.6     1.4    -      -       -      +
     93A  ILE*     1.3    82.7    -      -       -      +
     95A  GLU*     1.3    83.5    +      -       +      +
     96A  ASN      3.7     0.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 95 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91A  TYR*     2.9    32.9    +      -       +      +
     94A  LYS*     1.3   102.3    +      -       +      +
     96A  ASN*     1.3    72.9    +      -       -      +
     97A  ARG*     2.8    44.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 96 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91A  TYR      3.1     3.0    +      -       -      -
     92A  TYR*     3.1    24.6    +      -       -      +
     93A  ILE      4.5     0.8    -      -       -      +
     94A  LYS      3.7     1.0    -      -       -      -
     95A  GLU*     1.3    78.7    -      -       -      +
     97A  ARG*     1.3    60.2    +      -       -      +
    140A  LYS*     2.6    39.1    +      -       -      +
    144A  ASP*     4.2     2.8    -      -       -      +
      1B  MET*     5.7     4.5    -      -       -      +
----------------------------------------------------------
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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