Contacts of the helix formed by residues 133 - 160 (chain B) in PDB entry 5YWB


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 133 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132B  PHE*     1.3    91.3    -      -       +      +
    134B  LYS*     1.3    93.9    +      -       +      +
    136B  LEU*     4.1    10.0    +      -       +      +
    137B  ILE*     3.3    26.5    +      -       -      +
    194B  ARG*     3.5    29.4    -      -       +      +
    195B  TYR*     4.5     6.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 134 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132B  PHE*     3.4     8.2    -      -       +      +
    133B  PRO*     1.3   115.0    -      -       +      +
    135B  LEU*     1.3    72.3    +      -       +      +
    136B  LEU      3.1     2.0    -      -       -      -
    137B  ILE*     3.1    17.9    +      -       +      +
    138B  ALA*     2.9    20.3    +      -       -      +
    195B  TYR      5.5     2.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 135 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46B  ILE*     3.7    38.8    -      -       +      -
    123B  TYR*     4.1    14.9    -      -       +      -
    126B  ASN*     4.8    10.8    -      -       +      +
    127B  ILE*     3.5    35.8    -      -       +      +
    130B  SER*     5.8     0.2    -      -       -      +
    132B  PHE*     3.6    37.8    -      -       +      +
    134B  LYS*     1.3    78.5    -      -       +      +
    136B  LEU*     1.3    58.1    +      -       -      +
    138B  ALA*     3.0    12.5    +      -       +      +
    139B  LEU*     2.9    27.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 136 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     68B  PHE*     4.8    13.5    -      -       +      -
    124B  TYR*     4.5    15.9    -      -       +      -
    127B  ILE*     3.6    32.3    -      -       +      -
    132B  PHE      3.3    23.8    -      -       -      +
    133B  PRO*     4.2     9.9    -      -       +      +
    134B  LYS      3.1     0.4    -      -       -      -
    135B  LEU*     1.3    73.0    -      -       -      +
    137B  ILE*     1.3    61.2    +      -       +      +
    139B  LEU*     2.9    23.9    +      -       +      +
    140B  LEU*     2.9    14.7    +      -       -      +
    186B  GLU*     4.0    16.1    -      -       -      +
    189B  VAL*     4.0    27.4    -      -       +      -
    190B  ILE*     6.5     0.2    -      -       -      -
    193B  ARG*     5.2     6.3    -      -       -      -
    194B  ARG      6.5     0.4    -      -       -      -
    195B  TYR*     6.1     7.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 137 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133B  PRO      3.3    21.1    -      -       -      +
    134B  LYS*     3.1    19.0    +      -       +      +
    136B  LEU*     1.3    75.6    -      -       +      +
    138B  ALA*     1.3    62.8    +      -       -      +
    140B  LEU*     3.0    26.4    +      -       +      -
    141B  ILE*     3.0    16.5    +      -       +      +
    195B  TYR*     3.8    29.8    -      -       +      +
    196B  ILE*     4.8    11.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 138 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     38B  PHE*     5.7     3.1    -      -       -      -
     39B  LEU*     4.3     9.5    -      -       +      +
     42B  ILE*     5.3     9.6    -      -       +      -
     46B  ILE*     6.3     0.7    -      -       +      -
    123B  TYR*     4.7    16.2    -      -       +      +
    134B  LYS      2.9    12.6    +      -       -      +
    135B  LEU*     3.0    19.0    +      -       +      +
    137B  ILE*     1.3    76.7    -      -       -      +
    139B  LEU*     1.3    60.9    +      -       -      +
    141B  ILE*     3.9     5.6    +      -       -      +
    142B  TYR*     3.9    13.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 139 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     39B  LEU*     4.3    22.4    -      -       +      -
     74B  ARG*     4.8     2.2    -      -       -      +
    120B  SER*     3.9    38.1    -      -       -      +
    123B  TYR*     4.3    24.9    -      -       +      -
    124B  TYR*     4.5    17.5    -      -       +      -
    127B  ILE*     4.8     8.3    -      -       +      -
    135B  LEU      2.9     9.5    +      -       -      +
    136B  LEU*     2.9    12.2    +      -       +      +
    138B  ALA*     1.3    75.1    -      -       -      +
    140B  LEU*     1.3    65.8    +      -       -      +
    142B  TYR*     3.1     9.0    +      -       +      +
    143B  TRP*     3.0    31.1    +      -       -      +
    186B  GLU*     3.6    22.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 140 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    136B  LEU      2.9    13.0    +      -       -      +
    137B  ILE*     3.0    20.1    +      -       +      +
    139B  LEU*     1.3    76.4    -      -       -      +
    141B  ILE*     1.3    64.3    +      -       -      +
    143B  TRP*     3.2     7.0    +      -       -      +
    144B  THR*     3.0    29.5    +      -       +      -
    183B  LEU*     3.7    27.4    -      -       +      +
    186B  GLU*     4.1    23.1    -      -       +      -
    187B  VAL*     4.8    11.4    -      -       +      -
    190B  ILE*     5.5    15.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 141 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     38B  PHE*     5.2    12.3    -      -       +      -
    137B  ILE*     3.0    16.5    +      -       +      +
    138B  ALA*     4.2     6.7    -      -       -      +
    139B  LEU      3.2     0.2    -      -       -      -
    140B  LEU*     1.3    77.5    -      -       -      +
    142B  TYR*     1.3    61.9    +      -       -      +
    144B  THR*     2.5    23.4    +      -       -      -
    145B  LEU*     3.0    20.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 142 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     35B  PRO*     3.5    33.2    -      -       +      -
     36B  HIS*     2.8    41.9    +      +       -      -
     38B  PHE*     5.4     8.4    -      +       +      -
     39B  LEU*     3.5    41.1    -      -       +      -
    113B  ALA*     4.7     0.7    +      -       -      -
    116B  ALA*     3.2    17.4    -      -       +      +
    117B  ALA*     4.9     1.0    +      -       -      -
    120B  SER*     5.6     0.9    -      -       -      -
    138B  ALA      3.9     3.0    +      -       -      +
    139B  LEU*     3.1    11.2    +      -       +      +
    141B  ILE*     1.3    79.0    -      -       -      +
    143B  TRP*     1.3   101.4    +      +       -      +
    145B  LEU*     3.3     6.7    +      -       -      -
    146B  ALA*     2.9    25.6    +      -       +      +
    179B  TYR*     3.5    10.6    +      +       -      -
----------------------------------------------------------
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Residues in contact with TRP 143 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     74B  ARG*     4.1     4.3    -      -       -      +
     78B  THR*     6.0     1.6    -      -       -      -
     81B  LEU*     4.3     9.6    -      -       +      -
    117B  ALA*     5.8     3.6    -      -       -      -
    120B  SER*     3.8    26.2    -      -       -      -
    139B  LEU*     3.0    29.7    +      -       +      +
    140B  LEU*     3.2     3.8    +      -       -      +
    142B  TYR*     1.3    95.7    -      +       -      +
    144B  THR*     1.3    63.6    +      -       -      +
    146B  ALA*     3.8     1.6    -      -       -      +
    147B  PHE*     3.0    24.3    +      -       -      +
    179B  TYR*     3.3    47.6    -      +       -      -
    182B  LEU*     3.6    43.9    -      -       +      +
    183B  LEU*     3.5    27.1    -      -       +      +
    186B  GLU*     3.2    42.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 144 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    140B  LEU*     3.0    25.2    +      -       +      +
    141B  ILE*     2.5    26.3    +      -       -      -
    143B  TRP*     1.3    74.2    -      -       -      +
    145B  LEU*     1.3    67.9    +      -       -      +
    147B  PHE*     3.3     7.4    +      -       -      +
    148B  ILE*     3.0    31.8    +      -       -      +
    183B  LEU*     3.6    20.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 145 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     35B  PRO*     4.2    21.8    -      -       +      -
     38B  PHE*     5.3    15.0    -      -       +      -
    141B  ILE*     3.0    22.4    +      -       +      +
    142B  TYR*     3.9     5.8    -      -       -      +
    144B  THR*     1.3    81.0    -      -       -      +
    146B  ALA*     1.3    63.1    +      -       -      +
    148B  ILE*     3.2    21.2    +      -       +      +
    149B  THR*     3.0    28.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 146 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     35B  PRO*     4.6     5.3    -      -       +      +
     36B  HIS*     5.0     5.2    -      -       +      -
    142B  TYR*     2.9    28.6    +      -       +      +
    143B  TRP      3.8     0.4    -      -       -      +
    145B  LEU*     1.3    76.5    -      -       -      +
    147B  PHE*     1.3    63.2    +      -       -      +
    149B  THR*     2.7    22.3    +      -       -      -
    150B  LYS*     3.0    18.2    +      -       +      +
    179B  TYR*     3.3    37.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 147 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    143B  TRP      3.0    14.0    +      -       -      +
    144B  THR*     3.5     9.6    -      -       -      +
    146B  ALA*     1.3    77.2    -      -       -      +
    148B  ILE*     1.3    69.2    +      -       +      +
    150B  LYS*     3.3     5.8    +      -       -      +
    151B  THR*     2.9    42.1    +      -       +      -
    176B  VAL*     3.7    38.6    -      -       +      -
    179B  TYR*     4.7     8.2    -      -       +      -
    180B  GLY*     4.5    10.1    -      -       -      -
    183B  LEU*     3.8    23.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 148 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    144B  THR*     3.0    20.4    +      -       -      +
    145B  LEU*     3.2    27.1    +      -       +      +
    147B  PHE*     1.3    83.3    -      -       +      +
    149B  THR*     1.3    65.9    +      -       +      +
    151B  THR*     3.2     6.8    +      -       -      -
    152B  ILE*     3.0    37.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 149 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     28B  VAL*     6.2     0.2    -      -       -      -
     31B  LEU*     3.4    38.6    -      -       +      +
     32B  ASN*     3.4    35.7    +      -       -      +
     35B  PRO*     4.1    11.9    -      -       +      +
    145B  LEU*     3.0    12.5    +      -       +      +
    146B  ALA*     2.7    26.7    +      -       -      -
    148B  ILE*     1.3    79.5    -      -       +      +
    150B  LYS*     1.3    60.8    +      -       -      +
    152B  ILE*     3.2     9.5    +      -       -      +
    153B  LYS*     3.0    18.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 150 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     32B  ASN*     3.4    25.3    -      -       -      +
     36B  HIS*     5.6     5.9    +      -       -      -
     88B  GLU*     3.6     8.7    +      -       -      -
    109B  PRO*     5.4     6.9    -      -       -      +
    146B  ALA*     3.0    22.7    +      -       -      +
    147B  PHE*     3.8     4.9    -      -       -      +
    149B  THR*     1.3    77.1    +      -       -      +
    151B  THR*     1.3    58.3    +      -       -      +
    153B  LYS*     3.2    18.3    +      -       +      +
    154B  PHE*     2.9    27.9    +      -       -      +
    172B  THR*     5.3     6.9    -      -       -      +
    175B  LEU*     2.7    41.8    -      -       +      +
    176B  VAL*     3.3    27.8    -      -       +      +
    179B  TYR*     4.4    25.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 151 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    147B  PHE*     2.9    38.6    +      -       +      -
    148B  ILE*     3.5    10.5    -      -       -      -
    150B  LYS*     1.3    77.0    -      -       -      +
    152B  ILE*     1.3    69.1    +      -       +      +
    154B  PHE*     3.2     8.3    +      -       +      +
    155B  VAL*     3.0    34.4    +      -       +      +
    176B  VAL*     4.5     6.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 152 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     28B  VAL*     3.6    24.5    -      -       +      -
     31B  LEU*     4.9    15.5    -      -       +      -
    148B  ILE*     3.0    34.1    +      -       +      +
    149B  THR*     3.6     7.6    -      -       -      +
    151B  THR*     1.3    82.9    -      -       +      +
    153B  LYS*     1.3    65.4    +      -       -      +
    155B  VAL*     3.3     6.6    +      -       +      +
    156B  LYS*     3.0    38.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 153 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     25B  GLY      4.6     1.8    +      -       -      -
     28B  VAL*     3.5    21.0    -      -       +      +
     29B  ASP*     3.5    31.4    -      -       -      +
     32B  ASN*     3.4    39.0    -      -       -      +
    109B  PRO*     5.0     6.7    -      -       -      +
    149B  THR      3.0     7.7    +      -       -      +
    150B  LYS*     3.2    22.0    +      -       +      +
    152B  ILE*     1.3    77.4    -      -       -      +
    154B  PHE*     1.3    62.3    +      -       -      +
    156B  LYS*     3.4     3.7    +      -       -      +
    157B  PHE*     2.9    24.9    +      -       -      +
    168B  ARG*     5.7     8.2    -      -       -      +
    172B  THR*     5.1    17.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 154 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    150B  LYS      2.9    14.0    +      -       -      +
    151B  THR*     3.2    12.5    +      -       +      +
    153B  LYS*     1.3    75.0    -      -       -      +
    155B  VAL*     1.3    65.9    +      -       +      +
    157B  PHE*     3.3     5.8    +      -       -      +
    158B  TYR*     2.9    41.4    +      +       +      +
    169B  PHE*     3.4    43.7    -      +       -      -
    172B  THR*     5.1    11.8    -      -       -      +
    173B  GLY*     5.1    18.4    -      -       -      -
    176B  VAL*     5.1     8.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 155 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    151B  THR*     3.0    31.8    +      -       +      +
    152B  ILE*     3.8     6.7    -      -       +      +
    154B  PHE*     1.3    83.9    -      -       +      +
    156B  LYS*     1.3    77.6    +      -       +      +
    158B  TYR*     3.0    16.4    +      -       -      +
    159B  ASP*     3.0    24.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 156 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     28B  VAL*     5.0    13.9    -      -       +      -
    152B  ILE*     3.0    31.0    +      -       +      +
    153B  LYS*     4.0     4.5    -      -       -      +
    155B  VAL*     1.3    87.4    -      -       +      +
    157B  PHE*     1.3    58.7    +      -       -      +
    159B  ASP*     3.7    15.4    +      -       +      +
    160B  HIS*     2.9    34.0    +      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 157 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    153B  LYS      2.9    17.8    +      -       -      +
    154B  PHE*     3.6     7.0    -      -       -      +
    155B  VAL      3.1     0.2    -      -       -      -
    156B  LYS*     1.3    75.9    -      -       -      +
    158B  TYR*     1.3    66.9    +      -       -      +
    160B  HIS*     3.0    34.7    +      -       +      +
    167B  LEU      5.8     1.8    -      -       -      -
    168B  ARG*     3.8    29.2    -      -       +      -
    169B  PHE*     3.7    48.0    -      +       +      -
    172B  THR*     5.8     4.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 158 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    154B  PHE*     2.9    37.7    +      +       +      +
    155B  VAL*     3.0     7.6    +      -       -      +
    157B  PHE*     1.3    79.3    -      -       -      +
    159B  ASP*     1.3    72.6    +      -       -      +
    160B  HIS      3.1     5.9    +      -       -      -
    169B  PHE*     5.2    11.2    -      +       +      -
----------------------------------------------------------
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Residues in contact with ASP 159 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    155B  VAL*     3.0    26.5    +      -       -      +
    156B  LYS*     4.0    17.6    +      -       +      +
    157B  PHE      3.2     0.4    -      -       -      -
    158B  TYR*     1.3    86.6    -      -       -      +
    160B  HIS*     1.3    66.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with HIS 160 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    156B  LYS*     2.9    29.9    +      -       +      +
    157B  PHE*     3.0    30.2    +      -       +      +
    158B  TYR      3.9     5.2    -      -       -      -
    159B  ASP*     1.3    87.6    -      -       +      +
----------------------------------------------------------
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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