Contacts of the helix formed by residues 167 - 191 (chain P) in PDB entry 5D4D


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 PRO 167 (chain P).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    406N  ASP*     4.7     1.6    -      -       -      +
    165P  SER      4.5     2.2    -      -       -      +
    166P  LEU*     1.3    93.4    -      -       +      +
    168P  LYS*     1.3    55.1    +      -       -      +
    169P  GLU*     3.3    23.8    -      -       -      +
    170P  HIS*     2.9    23.1    +      -       +      -
    171P  LYS      2.5    33.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 168 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    403N  PHE*     5.2     6.0    -      -       -      -
    404N  GLU      4.2     6.5    +      -       -      -
    405N  ASP*     3.9    31.4    +      -       -      +
    406N  ASP*     3.5    40.9    +      -       +      +
    442N  ASN*     5.3     8.4    -      -       -      +
    167P  PRO*     1.3    71.2    -      -       -      +
    169P  GLU*     1.3    63.5    +      -       -      +
    171P  LYS*     3.5     4.1    -      -       -      +
    172P  ARG*     2.9    28.1    +      -       -      +
    175P  HIS*     5.9     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 169 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    167P  PRO*     3.3    24.3    -      -       -      +
    168P  LYS*     1.3    81.9    +      -       -      +
    170P  HIS*     1.3    77.5    +      -       +      +
    172P  ARG*     3.3    25.2    -      -       -      +
    173P  TYR*     4.2    12.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with HIS 170 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    116P  LEU*     3.7    20.4    -      -       -      +
    119P  ILE*     3.6    46.3    -      -       +      +
    166P  LEU*     4.3    10.2    -      -       +      +
    167P  PRO*     2.9    29.2    +      -       +      +
    169P  GLU*     1.3    92.0    +      -       +      +
    171P  LYS*     1.3    60.3    +      -       -      +
    172P  ARG      3.1     6.5    +      -       -      -
    173P  TYR*     3.5    16.6    +      +       -      +
----------------------------------------------------------
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Residues in contact with LYS 171 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    406N  ASP*     3.5    19.6    +      -       -      +
    407N  VAL      2.4    32.1    +      -       -      -
    408N  GLU*     3.5    23.1    +      -       -      +
    409N  VAL      5.1     1.3    -      -       -      -
    163P  LEU      4.1    11.9    -      -       -      +
    164P  LYS*     3.5    37.4    +      -       -      +
    166P  LEU*     3.3    20.8    +      -       -      +
    167P  PRO      2.5    19.6    +      -       -      +
    168P  LYS*     3.5     6.5    -      -       -      +
    170P  HIS*     1.3    71.3    -      -       -      +
    172P  ARG*     1.3    57.0    +      -       -      +
    173P  TYR      3.3     0.4    -      -       -      -
    174P  LEU*     3.4    18.3    +      -       +      +
    175P  HIS*     2.7    42.3    +      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 172 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    354N  VAL*     6.2     2.2    -      -       -      +
    439N  LEU*     3.6    45.4    +      -       +      +
    168P  LYS      2.9    10.9    +      -       -      +
    169P  GLU*     3.3    19.1    -      -       -      +
    170P  HIS      3.1     0.2    -      -       -      -
    171P  LYS*     1.3    78.4    -      -       -      +
    173P  TYR*     1.3    67.5    +      -       +      +
    175P  HIS*     3.1    12.8    +      -       -      +
    176P  ILE*     3.0    43.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 173 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    112P  ALA*     3.4    23.9    -      -       +      +
    115P  LYS*     3.4    44.3    +      -       +      +
    116P  LEU*     3.6    23.6    -      -       +      +
    119P  ILE*     4.1    16.4    -      -       +      -
    169P  GLU      4.2    13.2    -      -       -      -
    170P  HIS*     3.8    14.4    -      +       -      +
    171P  LYS      3.3     0.2    -      -       -      -
    172P  ARG*     1.3    82.6    -      -       +      +
    174P  LEU*     1.3    59.3    +      -       -      +
    176P  ILE*     3.8    11.2    -      -       +      -
    177P  ALA*     2.9    30.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 174 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    410N  SER*     3.7    17.7    -      -       -      +
    116P  LEU*     3.9    13.2    -      -       +      +
    131P  VAL*     4.6     7.4    -      -       +      -
    160P  ASP*     4.1     4.5    -      -       -      +
    163P  LEU*     3.8    46.4    -      -       +      +
    164P  LYS*     3.7    30.5    -      -       +      -
    170P  HIS      4.2     1.0    +      -       -      +
    171P  LYS*     3.4    23.3    +      -       +      +
    173P  TYR*     1.3    78.3    -      -       -      +
    175P  HIS*     1.3    57.1    +      -       +      +
    177P  ALA*     3.3     2.9    +      -       -      +
    178P  ARG*     2.9    53.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with HIS 175 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    406N  ASP*     5.2     0.9    -      -       -      -
    407N  VAL*     3.2    30.2    +      -       +      +
    409N  VAL      3.4     6.5    +      -       -      -
    410N  SER*     3.4    24.4    +      -       -      -
    411N  THR*     4.4     6.2    +      -       -      +
    437N  VAL*     3.4    34.3    -      -       +      +
    439N  LEU*     3.9    21.7    -      -       +      +
    171P  LYS*     2.7    47.9    +      -       +      -
    172P  ARG*     3.1     9.6    +      -       -      +
    174P  LEU*     1.3    72.9    -      -       +      +
    176P  ILE*     1.3    67.8    +      -       -      +
    178P  ARG*     3.4     3.2    +      -       -      +
    179P  GLU*     3.0    27.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 176 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    439N  LEU*     3.7    22.4    -      -       +      -
    105P  LYS      4.7     1.7    -      -       -      +
    108P  GLU*     3.3    41.7    -      -       +      +
    109P  GLY*     4.1     1.3    -      -       -      +
    112P  ALA*     3.6     5.6    -      -       +      -
    172P  ARG*     3.0    35.3    +      -       +      +
    173P  TYR*     3.7    16.2    -      -       +      +
    175P  HIS*     1.3    78.1    -      -       -      +
    177P  ALA*     1.3    57.5    +      -       -      +
    179P  GLU*     3.5     3.5    +      -       -      +
    180P  GLY*     2.9    25.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 177 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    109P  GLY*     4.0    14.3    -      -       -      +
    112P  ALA*     4.3     1.6    -      -       +      -
    113P  ILE*     3.9    29.0    -      -       +      +
    116P  LEU*     4.7     3.8    -      -       +      -
    131P  VAL*     3.7    20.3    -      -       +      +
    173P  TYR      2.9    18.5    +      -       -      +
    174P  LEU*     3.7     4.5    -      -       -      +
    176P  ILE*     1.3    74.2    -      -       -      +
    178P  ARG*     1.3    66.7    +      -       -      +
    180P  GLY*     2.9     2.8    +      -       -      -
    181P  GLU*     2.9    21.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 178 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    410N  SER*     3.5    17.7    -      -       -      +
    411N  THR*     2.5    48.3    +      -       -      +
    412N  GLY      4.2     0.4    -      -       -      -
    413N  ASP*     2.5    30.3    +      -       -      +
    131P  VAL*     3.6    29.9    +      -       +      +
    134P  LYS*     3.5    19.8    -      -       -      +
    135P  ILE*     3.4    16.1    -      -       +      +
    160P  ASP*     2.7    40.0    +      -       -      -
    164P  LYS*     4.0     6.9    -      -       -      +
    174P  LEU*     2.9    32.4    +      -       +      +
    175P  HIS      3.6     4.7    -      -       -      +
    177P  ALA*     1.3    74.2    -      -       -      +
    179P  GLU*     1.3    64.0    +      -       -      +
    180P  GLY      3.0     0.5    +      -       -      -
    181P  GLU      3.1     2.8    +      -       -      -
    182P  ALA      3.0    18.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 179 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    411N  THR*     4.5    17.2    +      -       +      +
    437N  VAL      4.5    11.9    -      -       -      +
    105P  LYS*     3.5    38.4    +      -       +      +
    175P  HIS      3.0    17.5    +      -       -      +
    176P  ILE*     4.1     3.5    -      -       -      +
    178P  ARG*     1.3    76.9    -      -       -      +
    180P  GLY*     1.3    58.2    +      -       -      +
    182P  ALA*     3.7    10.9    -      -       +      +
    183P  ALA*     2.9    28.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 180 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    105P  LYS      3.7    22.2    -      -       -      -
    106P  VAL*     3.9     7.6    -      -       -      +
    109P  GLY*     4.3     6.3    -      -       -      -
    176P  ILE      2.9    11.7    +      -       -      -
    177P  ALA      2.9    10.4    +      -       -      -
    179P  GLU*     1.3    76.0    -      -       -      +
    181P  GLU*     1.3    56.9    +      -       -      -
    183P  ALA*     3.2     3.6    +      -       -      +
    184P  ARG*     2.9    28.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 181 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    113P  ILE*     4.3     6.4    -      -       -      +
    128P  ARG*     3.6    25.6    -      -       -      +
    131P  VAL*     3.6    25.8    -      -       +      -
    132P  ARG*     3.7    27.2    +      -       +      +
    135P  ILE*     3.8    17.5    -      -       +      -
    177P  ALA      2.9    10.7    +      -       -      +
    178P  ARG      3.1     6.0    +      -       -      +
    180P  GLY*     1.3    70.6    -      -       -      +
    182P  ALA*     1.3    63.3    +      -       -      +
    184P  ARG*     3.1    40.0    +      -       -      +
    185P  GLN*     3.0    30.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 182 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    411N  THR*     5.4     3.8    -      -       +      -
    434N  ARG*     5.3     4.7    -      -       -      +
    135P  ILE*     4.0    24.1    -      -       +      +
    178P  ARG      3.0    12.5    +      -       -      +
    179P  GLU*     3.7    17.3    -      -       +      +
    181P  GLU*     1.3    76.5    -      -       -      +
    183P  ALA*     1.3    61.9    +      -       -      +
    185P  GLN*     3.2     6.8    +      -       -      +
    186P  HIS*     3.0    22.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 183 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    102P  LEU*     3.7    34.1    -      -       +      +
    105P  LYS*     3.6    28.9    -      -       +      -
    106P  VAL*     4.0     2.2    -      -       +      -
    179P  GLU      2.9    19.0    +      -       -      +
    180P  GLY      3.5     4.7    -      -       -      +
    182P  ALA*     1.3    76.2    -      -       -      +
    184P  ARG*     1.3    57.8    +      -       -      +
    186P  HIS*     3.3     1.5    +      -       -      -
    187P  LEU*     2.9    29.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 184 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    560N  GLN      2.7    30.5    +      -       -      -
    561N  GLY      3.6     6.7    +      -       -      -
    106P  VAL*     3.6    23.7    -      -       +      +
    132P  ARG*     3.7    19.0    -      -       -      +
    180P  GLY      2.9    12.8    +      -       -      +
    181P  GLU*     3.1    36.1    +      -       -      +
    183P  ALA*     1.3    74.3    -      -       -      +
    185P  GLN*     1.3    87.6    +      -       -      +
    187P  LEU*     3.1     4.7    +      -       -      +
    188P  ILE*     2.9    45.8    +      -       +      +
    221P  ILE*     4.6     2.4    -      -       -      +
    224P  VAL*     3.9    16.1    -      -       +      +
    225P  GLU*     3.4    31.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 185 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    561N  GLY      3.2    21.5    +      -       -      +
    563N  PRO*     3.4    33.4    -      -       -      +
    564N  GLU      4.9     0.3    +      -       -      -
    132P  ARG*     4.9     2.0    -      -       -      +
    135P  ILE*     4.5     6.0    -      -       +      +
    136P  LEU*     3.7    30.7    -      -       +      +
    181P  GLU*     3.0    23.6    +      -       -      +
    182P  ALA*     3.2     9.6    +      -       -      +
    184P  ARG*     1.3    97.7    -      -       -      +
    186P  HIS*     1.3    59.4    +      -       -      +
    188P  ILE*     4.0     2.3    -      -       -      +
    189P  GLU*     3.0    41.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 186 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91P  VAL*     4.0    25.0    -      -       +      +
     92P  PRO*     5.3     5.6    -      -       +      -
     94P  LEU*     4.4    17.4    -      -       +      +
     98P  GLU*     5.8     0.4    +      -       -      -
    102P  LEU*     4.1    24.7    -      -       +      -
    182P  ALA      3.0    13.3    +      -       -      +
    183P  ALA*     3.8     7.2    -      -       -      +
    184P  ARG      3.2     0.2    -      -       -      -
    185P  GLN*     1.3    77.1    -      -       -      +
    187P  LEU*     1.3    56.9    +      -       -      +
    189P  GLU*     4.4     9.0    +      -       -      +
    190P  ALA*     2.9    25.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 187 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     94P  LEU*     3.8    20.0    -      -       +      -
     99P  GLU*     4.6    14.6    -      -       +      +
    102P  LEU*     4.0    15.4    -      -       +      +
    103P  ALA*     4.3    26.5    -      -       +      +
    106P  VAL*     4.6     4.7    -      -       +      -
    183P  ALA      2.9    17.2    +      -       -      +
    184P  ARG*     3.1     5.6    +      -       -      +
    186P  HIS*     1.3    74.1    -      -       -      +
    188P  ILE*     1.3    65.5    +      -       -      +
    190P  ALA*     3.4     1.6    +      -       -      +
    191P  ASN*     2.8    48.7    +      -       -      +
    224P  VAL*     3.8    31.6    -      -       +      +
    227P  PHE*     5.3     1.6    -      -       +      -
    235P  PHE*     4.5    13.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 188 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    561N  GLY      5.0     0.9    -      -       -      +
    563N  PRO*     3.6    33.9    -      -       +      -
    566N  ILE*     4.2    11.2    -      -       +      -
    184P  ARG*     2.9    45.2    +      -       +      +
    185P  GLN*     4.8     1.3    -      -       -      -
    187P  LEU*     1.3    74.1    -      -       -      +
    189P  GLU*     1.3    63.9    +      -       -      +
    190P  ALA      3.2     0.9    +      -       -      -
    191P  ASN      3.3     9.2    +      -       -      -
    192P  LEU*     3.6    11.3    +      -       +      +
    220P  LEU*     3.6    19.4    -      -       +      +
    221P  ILE*     3.8    33.2    -      -       +      -
    224P  VAL*     3.8    23.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 189 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    563N  PRO*     3.5    29.6    -      -       +      +
    564N  GLU*     3.6    15.6    +      -       -      +
    565N  ILE*     3.8    29.2    -      -       +      +
     88P  ILE*     5.5     1.2    -      -       -      +
     91P  VAL*     3.9    24.9    -      -       +      +
    185P  GLN*     3.0    24.6    +      -       -      +
    186P  HIS*     4.0     9.4    +      -       -      +
    188P  ILE*     1.3    77.2    -      -       -      +
    190P  ALA*     1.3    61.1    +      -       -      +
    191P  ASN      3.6     0.3    +      -       -      -
    192P  LEU*     3.7    24.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 190 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91P  VAL*     4.0    11.4    -      -       -      +
     92P  PRO      4.4     7.1    -      -       -      +
     93P  LEU*     3.4    23.6    -      -       -      +
     94P  LEU*     3.6    41.7    -      -       +      -
    186P  HIS*     2.9    24.0    +      -       -      +
    187P  LEU      3.8     3.1    -      -       -      +
    188P  ILE      3.2     0.2    -      -       -      -
    189P  GLU*     1.3    79.5    -      -       -      +
    191P  ASN*     1.3    60.1    +      -       -      +
    192P  LEU      3.4     0.7    +      -       -      -
    193P  ARG*     4.6     5.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 191 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     93P  LEU*     5.2     0.7    -      -       -      +
     94P  LEU*     4.7     4.5    -      -       -      +
     99P  GLU*     4.9     1.6    -      -       -      +
    187P  LEU*     2.8    35.9    +      -       -      +
    188P  ILE      3.3     3.0    +      -       -      -
    190P  ALA*     1.3    80.9    -      -       -      +
    192P  LEU*     1.3    61.5    +      -       -      +
    193P  ARG      3.0     5.6    +      -       -      -
    194P  LEU*     3.1    20.0    +      -       +      +
    195P  VAL      3.9     0.3    +      -       -      -
    220P  LEU*     3.5    28.4    -      -       +      +
    235P  PHE*     3.2    33.3    -      -       +      +
      6S    T      2.9    38.6    +      -       -      +
----------------------------------------------------------
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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