Contacts of the helix formed by residues 329 - 353 (chain B) in PDB entry 4OG2


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 329 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     73B  GLU*     3.3    37.0    -      -       -      +
    283B  ASN      5.5     2.7    -      -       -      +
    284B  THR*     5.8     1.1    -      -       -      -
    285B  SER*     5.6     4.7    -      -       -      +
    304B  TYR*     4.2     1.1    -      -       -      -
    320B  TYR*     3.2    31.0    -      -       +      +
    327B  GLU      3.4     6.5    -      -       -      +
    328B  PRO*     1.3    86.9    -      -       +      +
    330B  GLN*     1.3    67.0    +      -       -      +
    331B  PHE      4.2     0.2    -      -       -      +
    332B  SER*     3.0    27.5    +      -       -      +
    333B  ALA*     3.1    12.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 330 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    176B  VAL*     5.5     1.7    -      -       -      +
    280B  ASP*     2.9    26.9    +      -       -      +
    283B  ASN*     3.2    28.1    +      -       -      +
    301B  ALA      4.1     0.7    -      -       -      +
    302B  GLN*     3.5    12.9    +      -       -      +
    303B  ALA*     2.9    27.7    +      -       -      +
    304B  TYR*     3.9    29.0    -      -       +      +
    328B  PRO      4.0     0.2    +      -       -      -
    329B  PRO*     1.3    71.7    -      -       -      +
    331B  PHE*     1.3    80.2    +      -       +      +
    333B  ALA*     3.1     3.6    +      -       -      +
    334B  GLN*     2.9    51.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 331 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     70B  LEU*     3.6    23.3    -      -       +      -
     73B  GLU*     3.6    21.5    -      -       +      +
     74B  GLN*     3.9    21.5    +      -       +      +
    153B  SER*     4.1    15.3    -      -       -      -
    280B  ASP*     3.3    45.5    -      -       -      -
    283B  ASN*     3.2    28.9    +      -       +      -
    329B  PRO*     3.2     2.2    -      -       -      +
    330B  GLN*     1.3    92.8    -      -       -      +
    332B  SER*     1.3    57.3    +      -       -      +
    334B  GLN*     3.5    16.1    -      -       -      +
    335B  ALA*     3.1    28.4    +      -       -      +
    501B  LEU*     3.5    22.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 332 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     73B  GLU*     2.7    33.5    +      -       -      +
     77B  GLY*     3.4    17.0    -      -       -      -
    316B  PHE*     3.8     7.9    -      -       -      -
    320B  TYR*     3.5    18.0    -      -       -      -
    329B  PRO*     3.0    31.2    +      -       -      +
    331B  PHE*     1.3    76.8    -      -       -      +
    333B  ALA*     1.3    59.3    +      -       -      +
    335B  ALA      3.4     0.9    +      -       -      -
    336B  PHE*     3.0    26.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 333 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    304B  TYR*     3.5    46.2    -      -       +      -
    316B  PHE*     3.6    18.3    -      -       +      -
    329B  PRO      3.1     6.0    +      -       -      +
    330B  GLN      3.5     7.4    -      -       -      +
    332B  SER*     1.3    76.3    -      -       -      +
    334B  GLN*     1.3    58.5    +      -       -      +
    336B  PHE*     3.4     3.8    +      -       -      +
    337B  ALA*     2.9    28.1    +      -       -      +
    379B  PRO*     4.1     6.3    -      -       +      +
    380B  LEU*     3.9     7.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 334 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    152B  PRO*     3.1    26.7    -      -       -      +
    153B  SER*     4.5     0.3    -      -       -      -
    155B  THR*     5.6     1.6    -      -       -      +
    169B  VAL*     3.5    15.0    +      -       +      +
    170B  SER*     3.7    25.7    -      -       -      +
    171B  ALA      4.3     1.8    +      -       -      +
    280B  ASP*     5.3     0.2    -      -       -      +
    303B  ALA*     3.7    25.9    -      -       -      +
    330B  GLN*     2.9    42.3    +      -       +      +
    331B  PHE*     3.5    16.7    -      -       -      +
    333B  ALA*     1.3    74.1    -      -       -      +
    335B  ALA*     1.3    60.1    +      -       -      +
    337B  ALA*     3.3     3.6    +      -       -      +
    338B  ALA*     3.0    23.7    +      -       -      +
    380B  LEU*     3.7    24.7    -      -       +      +
    393B  GLN*     5.5     0.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 335 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     61B  LEU*     5.5     2.0    -      -       +      -
     74B  GLN*     3.2    36.1    -      -       +      +
     78B  ALA*     4.0     8.5    -      -       +      +
    127B  VAL*     4.8     4.4    -      -       +      +
    152B  PRO*     4.1    16.0    -      -       +      +
    331B  PHE      3.1    18.1    +      -       -      +
    332B  SER      3.7     4.3    -      -       -      +
    334B  GLN*     1.3    73.9    -      -       -      +
    336B  PHE*     1.3    65.4    +      -       -      +
    338B  ALA*     3.2     4.0    +      -       -      +
    339B  VAL*     3.1    26.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 336 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     77B  GLY      3.8    11.1    +      -       -      +
     80B  ILE*     4.2     3.8    -      -       +      -
     81B  ALA*     3.5    36.9    -      -       +      +
     84B  TYR*     3.9    19.3    -      +       +      -
     85B  PHE*     3.7    18.6    -      +       -      -
    312B  ILE*     3.7    22.0    -      -       +      -
    316B  PHE*     3.4    37.5    -      +       +      -
    332B  SER      3.0    14.0    +      -       -      +
    333B  ALA*     3.5     8.7    -      -       -      +
    335B  ALA*     1.3    75.5    -      -       -      +
    337B  ALA*     1.3    57.8    +      -       -      +
    339B  VAL*     3.2     4.9    +      -       -      +
    340B  GLN*     2.8    42.8    +      -       -      -
    379B  PRO*     3.5    23.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 337 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    169B  VAL*     4.4     7.4    -      -       +      -
    333B  ALA      2.9    18.0    +      -       -      +
    334B  GLN      3.5     5.6    -      -       -      +
    335B  ALA      3.2     0.2    -      -       -      -
    336B  PHE*     1.3    78.9    -      -       -      +
    338B  ALA*     1.3    57.7    +      -       -      +
    340B  GLN*     3.3    10.8    +      -       -      +
    341B  VAL*     2.9    34.1    +      -       -      +
    378B  THR*     4.0    16.4    -      -       +      +
    379B  PRO*     4.6     0.9    -      -       +      -
    380B  LEU*     3.7    27.4    -      -       +      -
    383B  ILE*     4.8     0.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 338 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    127B  VAL*     3.7    28.3    -      -       +      -
    150B  VAL*     3.8    25.1    -      -       +      +
    152B  PRO*     4.4     4.9    -      -       +      -
    169B  VAL*     4.0     9.1    -      -       +      +
    334B  GLN      3.0    12.9    +      -       -      +
    335B  ALA      3.6     8.5    -      -       -      +
    336B  PHE      3.2     0.2    -      -       -      -
    337B  ALA*     1.3    76.7    -      -       -      +
    339B  VAL*     1.3    61.8    +      -       -      +
    341B  VAL*     3.3     5.1    +      -       -      +
    342B  TYR*     3.3    25.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 339 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     57B  ILE*     5.3     3.1    -      -       +      -
     59B  ILE*     4.2    25.6    -      -       +      -
     78B  ALA*     4.2    14.6    -      -       +      -
     81B  ALA*     3.7    23.1    -      -       +      -
     82B  GLU      4.7     0.7    -      -       -      +
     85B  PHE*     4.4     2.5    -      -       +      -
     96B  ILE*     4.1    25.1    -      -       +      -
     98B  LEU*     4.3    10.1    -      -       +      -
    127B  VAL*     4.4     7.6    -      -       +      -
    335B  ALA      3.1    13.4    +      -       -      +
    336B  PHE      3.6     6.1    -      -       -      +
    338B  ALA*     1.3    75.0    -      -       -      +
    340B  GLN*     1.3    57.8    +      -       -      +
    342B  TYR*     3.1     7.2    +      -       -      +
    343B  VAL*     2.9    30.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 340 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     85B  PHE*     3.4    25.3    -      -       +      -
    312B  ILE*     3.5    14.7    -      -       -      +
    336B  PHE*     2.8    16.1    +      -       +      +
    337B  ALA      3.4     8.3    -      -       -      +
    339B  VAL*     1.3    76.5    -      -       -      +
    341B  VAL*     1.3    57.2    +      -       -      +
    343B  VAL*     4.4     0.9    -      -       -      +
    344B  GLU*     2.9    62.5    +      -       -      +
    376B  TYR*     5.1     1.3    -      -       +      -
    377B  ASN      2.9    28.2    +      -       -      +
    378B  THR*     3.3    30.8    -      -       +      +
    379B  PRO*     3.5    10.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 341 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    150B  VAL*     4.5     9.9    -      -       +      -
    169B  VAL*     3.9    19.7    -      -       +      -
    337B  ALA      2.9    18.6    +      -       -      +
    338B  ALA*     3.6     9.4    -      -       -      +
    339B  VAL      3.3     0.4    -      -       -      -
    340B  GLN*     1.3    74.1    -      -       +      +
    342B  TYR*     1.3    59.0    +      -       -      +
    345B  SER*     2.8    35.7    +      -       -      -
    371B  LEU*     4.0    16.8    -      -       +      -
    376B  TYR*     3.8    46.8    -      -       +      +
    378B  THR*     5.3     0.7    -      -       +      -
    383B  ILE*     4.7     3.6    -      -       +      -
    385B  PHE*     4.0    17.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 342 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     57B  ILE*     4.0    25.6    -      -       +      -
    124B  VAL*     5.4     1.1    -      -       +      -
    125B  GLY*     3.9     8.7    -      -       -      -
    126B  ILE      2.9    36.3    +      -       -      -
    127B  VAL*     3.6    20.4    -      -       +      -
    148B  PRO*     3.0    27.9    +      -       +      +
    150B  VAL*     3.5    19.4    +      -       +      +
    338B  ALA      3.3    16.2    +      -       -      -
    339B  VAL*     3.1     8.9    +      -       -      +
    341B  VAL*     1.3    78.8    -      -       -      +
    343B  VAL*     1.3    56.9    +      -       -      +
    345B  SER*     3.8     1.9    -      -       -      -
    346B  LEU*     2.8    37.6    +      -       +      +
    367B  LEU*     3.8    29.8    -      -       +      +
    371B  LEU*     3.8    22.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 343 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     57B  ILE*     4.9     1.6    -      -       +      -
     85B  PHE*     3.8    41.3    -      -       +      -
     90B  GLY      4.0    23.8    -      -       -      +
     91B  VAL*     4.3     2.6    -      -       +      +
     96B  ILE*     3.8    35.7    -      -       +      -
    339B  VAL*     2.9    23.6    +      -       +      +
    340B  GLN      3.9     3.1    -      -       -      +
    342B  TYR*     1.3    72.9    -      -       -      +
    344B  GLU*     1.3    60.6    +      -       +      +
    346B  LEU*     3.3     7.5    +      -       -      +
    347B  LYS*     2.9    37.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 344 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     85B  PHE*     4.3    13.1    -      -       +      -
    312B  ILE*     5.0     1.4    -      -       -      +
    340B  GLN*     2.9    53.7    +      -       +      +
    343B  VAL*     1.3    74.6    -      -       +      +
    345B  SER*     1.3    57.3    +      -       -      +
    347B  LYS*     3.4    17.5    +      -       +      +
    348B  ALA*     3.0    28.1    +      -       -      +
    375B  LYS      4.5     2.8    -      -       -      +
    376B  TYR*     3.5    32.1    -      -       +      +
    377B  ASN      4.7     1.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 345 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    341B  VAL      2.8    19.2    +      -       -      -
    342B  TYR*     3.9     0.4    -      -       -      -
    344B  GLU*     1.3    73.0    -      -       -      +
    346B  LEU*     1.3    61.0    +      -       -      +
    348B  ALA*     3.3     1.7    +      -       -      -
    349B  LEU*     2.8    31.7    +      -       -      +
    367B  LEU*     3.8    14.1    -      -       -      -
    370B  GLN*     3.4    14.1    +      -       -      +
    371B  LEU*     3.1    25.9    -      -       -      +
    376B  TYR*     2.8    28.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 346 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     55B  ILE*     4.0    34.3    -      -       +      -
     57B  ILE*     4.1    17.0    -      -       +      -
     91B  VAL*     3.7    23.9    -      -       +      +
    124B  VAL*     4.4     7.2    -      -       +      -
    342B  TYR*     2.8    27.7    +      -       +      +
    343B  VAL*     3.6     4.5    -      -       -      +
    345B  SER*     1.3    78.0    -      -       -      +
    347B  LYS*     1.3    56.4    +      -       -      +
    349B  LEU*     3.8     3.4    -      -       +      +
    350B  ASP*     2.8    33.1    +      -       -      +
    355B  VAL*     4.5     8.5    -      -       +      +
    363B  LEU*     4.5    20.2    -      -       +      -
    367B  LEU*     3.8    25.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 347 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     85B  PHE*     6.3     0.2    -      -       +      -
     90B  GLY      3.8    14.1    -      -       -      +
     91B  VAL*     3.8    17.9    -      -       -      -
     92B  ASN*     3.2    30.5    +      -       -      +
    343B  VAL*     2.9    30.2    +      -       +      +
    344B  GLU*     3.6    17.8    -      -       +      +
    345B  SER      3.2     0.2    -      -       -      -
    346B  LEU*     1.3    77.3    -      -       -      +
    348B  ALA*     1.3    56.5    +      -       -      +
    351B  THR*     2.8    34.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 348 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    344B  GLU      3.0    17.4    +      -       -      +
    345B  SER*     3.3     1.5    +      -       -      +
    347B  LYS*     1.3    73.1    -      -       -      +
    349B  LEU*     1.3    65.5    +      -       -      +
    351B  THR*     3.4     7.3    +      -       -      -
    352B  LYS*     3.4    30.1    +      -       -      +
    370B  GLN*     3.4    27.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 349 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    345B  SER      2.8    18.1    +      -       -      +
    346B  LEU*     3.8     3.6    -      -       +      +
    348B  ALA*     1.3    76.4    -      -       -      +
    350B  ASP*     1.3    52.8    +      -       -      +
    352B  LYS*     3.0     9.0    +      -       +      +
    353B  ASN*     2.8    48.1    +      -       +      +
    355B  VAL*     3.9     9.4    -      -       +      -
    358B  ILE*     4.6     7.4    -      -       +      -
    363B  LEU*     3.6    30.5    -      -       +      -
    366B  GLU*     4.0    28.3    -      -       +      +
    367B  LEU*     3.9    27.6    -      -       +      +
    370B  GLN*     4.1    16.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 350 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91B  VAL*     4.1     9.7    -      -       +      +
     92B  ASN*     2.9    33.2    +      -       -      +
    346B  LEU      2.8    19.5    +      -       -      +
    349B  LEU*     1.3    77.3    -      -       -      +
    351B  THR*     1.3    61.3    +      -       -      +
    352B  LYS      3.4     0.2    +      -       -      -
    353B  ASN      3.4     6.7    -      -       -      -
    354B  LYS*     3.4    31.6    +      -       -      +
    355B  VAL*     2.9    41.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 351 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     92B  ASN*     3.6    11.7    +      -       -      +
    347B  LYS      2.8    21.7    +      -       -      -
    348B  ALA*     3.6     9.4    -      -       -      -
    349B  LEU      3.2     0.2    -      -       -      -
    350B  ASP*     1.3    77.5    -      -       -      +
    352B  LYS*     1.3    64.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 352 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    348B  ALA*     3.5    16.6    -      -       -      +
    349B  LEU*     3.0    10.2    +      -       +      +
    351B  THR*     1.3    84.0    -      -       +      +
    353B  ASN*     1.3    79.0    +      -       -      +
    370B  GLN*     2.8    33.9    +      -       -      +
    373B  THR*     5.4     1.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 353 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    349B  LEU*     2.8    25.9    +      -       +      +
    350B  ASP*     3.4     4.9    -      -       -      -
    352B  LYS*     1.3    98.6    +      -       -      +
    354B  LYS*     1.3    67.9    +      -       -      +
    355B  VAL*     3.1     3.1    +      -       -      -
    358B  ILE*     3.9    18.9    -      -       +      +
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


   I  Hydrophilic      - N and O that can donate and accept hydrogen bonds
                         (e.g., oxygen of hydroxyl group of Ser. or Thr)
  II  Acceptor         - N or O that can only accept a hydrogen bond
 III  Donor            - N that can only donate a hydrogen bond
  IV  Hydrophobic      - Cl, Br, I and all C atoms that are not in
                         aromatic rings and do not have a covalent bond to
                         a N or O atom
   V  Aromatic         - C in aromatic rings irrespective of any other 
                         bonds formed by the atom
  VI  Neutral          - C atoms that have a covalent bond to at least one
                         atom of class I or two or more atoms from class II
                         or III; atoms; S, F, P, and metal atoms in all cases
 VII  Neutral-donor    - C atoms that have a covalent bond with only one
                         atom of class III
VIII  Neutral-acceptor - C atoms that have a covalent bond with only 
                         one atom of class II
For each pair of contacts the state of legitimacy is shown below:

Legend:
+, legitimate
-, illegitimate
------------------------------------------------------------
  Atomic class           I  II  III   IV   V   VI  VII  VIII
------------------------------------------------------------
   I  (Hydrophilic)      +   +    +    -   +   +    +    +
  II  (Acceptor)         +   -    +    -   +   +    +    -
 III  (Donor)            +   +    -    -   +   +    -    +
  IV  (Hydrophobic)      -   -    -    +   +   +    +    +
   V  (Aromatic)         +   +    +    +   +   +    +    +
  VI  (Neutral)          +   +    +    +   +   +    +    +
 VII  (Neutral-donor)    +   +    -    +   +   +    -    +
VIII  (Neutral-acceptor) +   -    +    +   +   +    +    -
------------------------------------------------------------
Warning!
Atom classes for heterogroups are automatically assigned based on the atomic coordinates. However, in three cases (see below) the automatic assignment is currently ambiguous. In these cases, the user is advised to manually analyse the full list of contacts using LPC software.
1. Carbon atoms belonging to a 4-, 5- or 6-member ring are 
   considered "aromatic" (Class V) if the ring is approximately
   planar, and "hydrophobic" (Class IV) or "neutral" (Classes
   VI, VII, VIII) if the ring is non-planar.
2. The oxygen atom of a carbonyl or hydroxy group is considered
   "hydroxy" (Class I) if the CO bond is longer than 1.29 Å, and
   "carbonyl" (Class II) if shorter.
3. All nitrogen atoms are considered "hydrophilic" (Class I).

Please E-mail any questions and/or suggestions concerning this page to Vladimir.Sobolev@weizmann.ac.il