Contacts of the helix formed by residues 210 - 230 (chain B) in PDB entry 3EHN


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 ASN 210 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    198B  SER*     4.2     3.8    +      -       -      +
    207B  TYR*     3.1    15.0    +      -       -      +
    208B  ASN*     2.8    11.5    +      -       +      +
    209B  GLY*     1.3    67.0    -      -       -      +
    211B  VAL*     1.3    60.4    +      -       -      +
    212B  GLN*     3.1    14.7    +      -       -      +
    213B  ASN*     2.9    51.8    +      -       -      +
    214B  TRP*     3.3    16.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 211 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    138B  ILE*     4.8     5.4    -      -       +      -
    192B  LEU*     3.3    48.0    -      -       +      +
    195B  ILE*     4.4    10.1    -      -       +      -
    196B  SER*     6.0     1.6    -      -       -      -
    197B  TYR      3.5    23.1    +      -       -      +
    198B  SER*     5.3     0.6    -      -       -      +
    199B  VAL*     3.5    20.9    -      -       +      -
    209B  GLY      2.7    17.0    +      -       -      +
    210B  ASN*     1.3    70.3    -      -       -      +
    212B  GLN*     1.3    68.9    +      -       -      +
    214B  TRP*     3.0    19.9    +      -       +      +
    215B  VAL*     3.0    12.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 212 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    192B  LEU      4.6     6.1    -      -       -      +
    193B  ASN*     5.3     4.3    -      -       -      +
    195B  ILE      4.9    10.0    +      -       -      +
    196B  SER*     5.1    10.3    +      -       -      +
    210B  ASN*     3.1    13.6    +      -       -      +
    211B  VAL*     1.3    80.8    -      -       -      +
    213B  ASN*     1.3    67.5    +      -       -      +
    215B  VAL*     2.8    34.1    +      -       +      +
    216B  LYS*     3.3    13.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 213 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    207B  TYR*     3.3    46.5    -      -       +      +
    210B  ASN*     2.9    31.4    +      -       -      +
    212B  GLN*     1.3    76.8    -      -       -      +
    214B  TRP*     1.3    64.0    +      -       -      +
    216B  LYS*     3.0    28.6    +      -       -      +
    217B  LEU      3.1     9.9    +      -       -      -
    257B  SER      5.1     4.3    +      -       -      +
    258B  SER*     4.2    24.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with TRP 214 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     43B  PHE*     4.0     5.4    -      +       -      -
     47B  GLN*     4.9     0.4    -      -       -      -
    138B  ILE*     3.7    46.2    -      -       +      +
    141B  ILE*     3.7    27.8    -      -       +      +
    142B  VAL*     3.5    34.3    -      -       +      -
    192B  LEU*     5.2     2.7    -      -       +      -
    204B  ASP*     3.0    41.0    +      -       -      -
    206B  ILE*     4.2    22.2    -      -       +      -
    207B  TYR*     3.6    16.2    -      +       +      +
    209B  GLY*     4.9     3.0    -      -       -      +
    210B  ASN      3.3    23.3    -      -       -      -
    211B  VAL*     3.0    17.3    +      -       +      +
    213B  ASN*     1.3    79.1    -      -       -      +
    215B  VAL*     1.3    54.6    +      -       -      +
    217B  LEU*     3.6    22.6    +      -       +      +
    218B  ALA*     3.0    26.5    +      -       -      +
    355B  TRP*     4.5     2.9    -      +       -      -
----------------------------------------------------------
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Residues in contact with VAL 215 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    189B  VAL*     3.9    12.6    -      -       +      +
    192B  LEU*     4.3    22.9    -      -       +      +
    193B  ASN*     3.3    28.9    -      -       -      +
    211B  VAL*     3.0    19.1    -      -       +      +
    212B  GLN*     2.8    26.8    +      -       +      +
    214B  TRP*     1.3    74.7    -      -       -      +
    216B  LYS*     1.3    65.5    +      -       +      +
    218B  ALA*     3.0    15.8    +      -       -      +
    219B  ASN*     3.1    30.7    +      -       -      +
    249B  ASN      4.2     3.8    -      -       -      +
    250B  GLY*     4.2     7.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 216 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    212B  GLN*     3.3    12.3    +      -       -      +
    213B  ASN*     3.0    21.7    +      -       -      +
    215B  VAL*     1.3    77.7    -      -       +      +
    217B  LEU*     1.3    51.1    +      -       -      +
    219B  ASN*     3.1     2.1    +      -       -      -
    220B  SER*     2.5    41.5    +      -       -      -
    250B  GLY*     4.3    14.6    -      -       -      +
    251B  GLY      3.4    20.2    -      -       -      +
    252B  VAL      4.0    15.3    -      -       -      +
    253B  ILE*     3.9    15.0    -      -       +      +
    254B  GLU      6.0     0.6    -      -       -      +
    255B  ASP*     4.2    11.9    +      -       -      -
    258B  SER*     3.7    30.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 217 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    141B  ILE*     4.6     2.2    -      -       +      -
    145B  ILE*     3.7    31.9    -      -       +      -
    206B  ILE*     5.2     0.4    -      -       +      -
    207B  TYR*     3.8    28.9    -      -       +      +
    213B  ASN      3.1     8.5    +      -       -      +
    214B  TRP*     3.8    25.4    -      -       +      +
    216B  LYS*     1.3    72.5    -      -       -      +
    218B  ALA*     1.3    60.8    +      -       -      +
    220B  SER*     4.0     4.5    -      -       -      -
    221B  LEU*     2.9    36.8    +      -       +      +
    253B  ILE*     4.1     7.5    -      -       +      +
    260B  ALA*     3.9    17.7    -      -       +      -
    355B  TRP*     4.5     4.0    -      -       +      -
    356B  PHE*     3.9    31.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 218 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    141B  ILE*     3.4    25.3    -      -       +      +
    185B  LEU*     3.5    23.1    -      -       +      +
    188B  SER*     5.4     0.4    -      -       -      -
    189B  VAL*     3.7    22.2    -      -       +      -
    192B  LEU*     5.8     0.2    -      -       +      -
    214B  TRP      3.0    14.4    +      -       -      +
    215B  VAL*     3.0    13.1    +      -       -      +
    217B  LEU*     1.3    76.8    -      -       -      +
    219B  ASN*     1.3    58.8    +      -       -      +
    222B  MET*     3.4    23.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 219 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    189B  VAL*     3.2    29.5    -      -       -      +
    215B  VAL*     3.1    17.5    +      -       -      +
    218B  ALA*     1.3    75.8    -      -       -      +
    220B  SER*     1.3    52.6    +      -       -      +
    221B  LEU      3.1     2.0    -      -       -      -
    222B  MET*     2.9    15.4    +      -       -      +
    223B  LEU*     2.7    35.5    +      -       -      +
    243B  LYS      4.9     0.3    -      -       -      -
    244B  ALA*     3.7    19.9    +      -       -      +
    249B  ASN*     2.6    32.0    +      -       -      +
    251B  GLY      2.9    26.7    +      -       -      +
    252B  VAL*     3.6     7.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 220 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    216B  LYS      2.5    22.1    +      -       -      -
    217B  LEU*     3.8     7.6    -      -       -      -
    219B  ASN*     1.3    72.2    -      -       -      +
    221B  LEU*     1.3    60.5    +      -       -      +
    223B  LEU*     3.4     7.4    -      -       -      +
    224B  ARG      3.4    12.3    +      -       -      -
    252B  VAL*     3.2    11.9    -      -       -      +
    253B  ILE*     2.6    43.5    +      -       -      +
    356B  PHE*     3.2    37.8    -      -       -      -
    361B  THR*     5.1     0.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 221 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    141B  ILE*     4.5     4.3    -      -       +      +
    144B  ASN*     4.7     4.7    -      -       +      -
    145B  ILE*     3.2    45.1    -      -       +      +
    148B  LEU*     3.6    27.6    -      -       +      -
    181B  MET*     5.8     0.2    -      -       -      -
    185B  LEU*     4.1    24.7    -      -       +      -
    217B  LEU*     2.9    22.1    +      -       +      +
    218B  ALA      4.2     3.1    -      -       -      +
    220B  SER*     1.3    75.5    -      -       -      +
    222B  MET*     1.3    66.4    +      -       -      +
    223B  LEU      3.2     0.2    -      -       -      -
    224B  ARG*     3.1    29.7    +      -       -      +
    225B  ILE*     3.0    30.9    +      -       +      +
    356B  PHE*     4.4     4.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 222 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    182B  LEU*     4.4     5.8    -      -       +      +
    185B  LEU*     3.5    26.4    -      -       +      +
    186B  SER*     3.3    40.2    -      -       -      +
    189B  VAL*     3.5    18.2    -      -       +      -
    218B  ALA      3.4    13.6    +      -       -      +
    219B  ASN*     2.9    23.3    +      -       -      +
    221B  LEU*     1.3    80.4    -      -       -      +
    223B  LEU*     1.3    57.2    -      -       -      +
    225B  ILE*     3.4     5.2    +      -       -      +
    226B  VAL*     2.9    28.4    +      -       -      +
    240B  TYR*     3.8    42.8    -      -       +      +
    243B  LYS*     4.6     5.6    -      -       +      -
    244B  ALA*     4.0     9.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 223 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    219B  ASN      2.7    11.2    +      -       -      +
    220B  SER*     3.4    11.0    -      -       -      +
    221B  LEU      3.2     0.2    -      -       -      -
    222B  MET*     1.3    74.6    -      -       -      +
    224B  ARG*     1.3    68.2    +      -       -      +
    226B  VAL*     2.9    24.1    -      -       -      +
    227B  VAL*     3.1    20.8    +      -       +      +
    241B  ILE*     4.3    22.9    -      -       +      -
    244B  ALA*     4.3    10.0    -      -       +      +
    245B  LEU*     4.5    22.2    -      -       +      -
    252B  VAL*     4.8     6.7    -      -       +      -
    356B  PHE*     5.7     0.7    -      -       +      -
    361B  THR*     4.3    20.6    -      -       +      +
    364B  LEU*     3.7    31.9    -      -       +      +
    365B  LYS*     4.7     5.6    -      -       +      +
    368B  ALA*     6.0     0.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 224 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    145B  ILE*     5.3     7.5    -      -       -      +
    148B  LEU*     4.8     5.9    -      -       +      +
    220B  SER      3.4     7.5    +      -       -      +
    221B  LEU*     3.1    32.2    +      -       +      +
    223B  LEU*     1.3    81.3    -      -       -      +
    225B  ILE*     1.3    67.4    +      -       +      +
    226B  VAL      2.9     0.3    +      -       -      -
    227B  VAL*     3.1     3.5    +      -       -      +
    228B  ARG*     3.0    37.0    +      -       -      +
    355B  TRP      3.5    21.6    +      -       -      -
    356B  PHE*     3.3    16.7    -      -       -      +
    360B  GLU*     2.4    50.6    +      -       -      +
    364B  LEU*     3.7    19.8    -      -       +      +
    455B  LYS*     5.0     1.3    -      -       -      +
    459B  LEU*     5.0     1.0    -      -       -      +
    462B  ASN*     5.2     2.4    -      -       -      +
    465B  GLU*     2.8    35.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 225 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    148B  LEU*     4.1    19.7    -      -       +      -
    178B  TYR*     3.3    37.0    -      -       +      +
    181B  MET*     4.0    25.6    -      -       +      -
    182B  LEU*     3.5    24.5    -      -       +      -
    185B  LEU*     3.5    31.2    -      -       +      -
    221B  LEU*     3.0    16.1    +      -       +      +
    222B  MET      3.6     5.4    -      -       -      +
    224B  ARG*     1.3    74.6    -      -       -      +
    226B  VAL*     1.3    66.1    +      -       -      +
    228B  ARG*     3.2    20.7    +      -       -      +
    229B  VAL*     3.2    11.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 226 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    182B  LEU*     4.7     4.2    -      -       +      +
    222B  MET      2.9    31.3    +      -       -      +
    223B  LEU*     2.9    12.5    +      -       -      +
    224B  ARG      2.9     0.4    +      -       -      -
    225B  ILE*     1.3    74.6    -      -       -      +
    227B  VAL*     1.3    56.7    +      -       -      +
    229B  VAL*     2.8    38.8    +      -       -      +
    230B  HIS      3.3     4.5    +      -       -      -
    236B  LEU      5.6     0.2    -      -       -      +
    237B  ALA*     3.3    32.2    -      -       +      +
    240B  TYR*     4.2    10.5    -      -       +      -
    241B  ILE*     3.3    51.6    -      -       +      +
    373B  LEU*     5.1     1.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 227 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    223B  LEU*     3.5    15.7    -      -       +      +
    224B  ARG      3.1     5.3    +      -       -      +
    226B  VAL*     1.3    77.9    -      -       +      +
    228B  ARG*     1.3    62.2    +      -       -      +
    229B  VAL      3.0     1.4    +      -       -      -
    230B  HIS*     3.2    24.9    +      -       +      +
    241B  ILE*     5.2     0.2    -      -       +      -
    364B  LEU*     3.4    44.9    -      -       +      +
    367B  GLU*     3.3    43.3    -      -       +      +
    368B  ALA*     5.1     8.1    -      -       +      +
    373B  LEU*     5.7     0.7    -      -       -      -
    469B  GLU*     5.3     0.4    -      -       -      +
    472B  ARG*     3.5    16.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 228 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    148B  LEU*     4.7     7.3    -      -       -      +
    152B  ASP*     3.1    27.3    +      -       -      -
    178B  TYR*     3.0    31.7    +      -       +      +
    224B  ARG*     3.0    24.5    +      -       -      +
    225B  ILE*     3.2    15.0    -      -       -      +
    226B  VAL      3.0     0.4    +      -       -      -
    227B  VAL*     1.3    76.6    -      -       -      +
    229B  VAL*     1.3    56.4    +      -       +      +
    231B  PHE*     5.1     2.4    +      -       -      +
    465B  GLU*     3.5    25.3    +      -       -      -
    468B  THR*     3.3    14.5    -      -       -      +
    469B  GLU*     2.8    27.7    +      -       -      -
    472B  ARG*     3.4    29.5    +      -       -      +
    535B  TRP*     3.3    45.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 229 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    178B  TYR*     4.1    12.8    -      -       +      -
    182B  LEU*     5.7     2.7    -      -       +      -
    225B  ILE*     3.2    13.0    -      -       +      +
    226B  VAL*     2.8    31.2    +      -       -      +
    228B  ARG*     1.3    83.7    -      -       +      +
    230B  HIS*     1.3    50.0    +      -       -      +
    231B  PHE      2.7    17.7    +      -       -      -
    232B  ILE*     2.9     5.7    +      -       +      +
    233B  ASP*     2.9    28.9    +      -       +      +
    236B  LEU*     4.7    12.6    -      -       +      -
    237B  ALA*     4.1    15.5    -      -       +      +
    534B  TRP*     3.3    42.0    -      -       +      -
    535B  TRP*     5.2     2.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with HIS 230 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    226B  VAL      3.3     4.7    +      -       -      +
    227B  VAL*     3.2    27.0    +      -       +      +
    229B  VAL*     1.3    73.4    -      -       -      +
    231B  PHE*     1.3    96.5    +      +       -      +
    232B  ILE      3.6     0.2    -      -       -      -
    233B  ASP      4.0    12.1    -      -       -      -
    234B  GLU*     4.5    16.1    +      -       +      +
    237B  ALA*     4.1     9.6    -      -       +      -
    367B  GLU*     2.7    37.3    +      -       +      +
    371B  TYR*     3.6    22.8    -      +       +      +
    373B  LEU*     4.1    28.3    -      -       +      -
----------------------------------------------------------
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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