Contacts of the helix formed by residues 339 - 364 (chain B) in PDB entry 3V4R


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 GLU 339 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65B  HIS*     3.6    25.1    -      -       +      +
     69B  LEU*     5.6     3.1    -      -       +      -
    338B  ASP*     1.4    72.5    -      -       +      +
    340B  SER*     1.3    54.2    +      -       -      +
    341B  HIS*     3.2    23.1    -      -       +      -
    342B  VAL*     2.8    27.4    +      -       +      +
    343B  THR*     3.1     9.9    +      -       -      -
    392B  VAL*     2.9    12.2    +      -       -      +
    393B  SER*     4.5     3.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 340 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    337B  VAL*     3.7    23.6    -      -       -      -
    338B  ASP      3.3     1.2    -      -       -      -
    339B  GLU*     1.3    74.2    -      -       -      +
    341B  HIS*     1.3    56.4    +      -       -      +
    342B  VAL      3.0     0.9    +      -       -      -
    343B  THR      4.3     0.2    -      -       -      +
    344B  ILE*     2.8    35.3    +      -       -      +
    391B  TYR*     3.6    27.5    -      -       -      +
    392B  VAL      3.1     7.0    +      -       -      -
    393B  SER*     3.4    16.2    -      -       -      -
    396B  PRO*     4.6     1.2    -      -       -      +
    400B  GLU*     2.8    29.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 341 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    339B  GLU*     3.8    13.2    -      -       +      -
    340B  SER*     1.3    74.6    +      -       -      +
    342B  VAL*     1.3    78.1    +      -       +      +
    345B  PRO*     3.5    19.6    -      -       -      +
    393B  SER*     2.7    23.9    +      -       -      +
    394B  ALA*     5.2     2.2    -      -       +      -
    395B  THR*     3.4    29.5    +      -       -      +
    397B  GLY*     3.6    16.6    -      -       -      +
    400B  GLU*     3.2     9.6    +      -       -      -
    532B  ARG*     3.7    28.6    -      -       +      +
    536B  GLN*     5.8     5.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 342 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65B  HIS*     3.4    37.0    -      -       +      +
    339B  GLU*     2.8    13.3    +      -       +      +
    341B  HIS*     1.3   114.3    -      -       +      +
    343B  THR*     1.3    62.7    +      -       -      +
    345B  PRO*     3.3    11.2    -      -       -      +
    346B  GLN*     3.4    15.7    +      -       +      +
      2C    A      5.4    11.4    -      -       -      +
      3C    C      5.8     6.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 343 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63B  ILE*     3.8    30.7    -      -       +      +
     64B  ALA      4.3     1.3    -      -       -      +
     65B  HIS*     3.2    30.4    +      -       +      +
    337B  VAL*     3.6    21.8    -      -       +      -
    338B  ASP      2.7    22.9    +      -       -      -
    339B  GLU      3.1     3.2    +      -       -      -
    342B  VAL*     1.3    73.1    -      -       -      +
    344B  ILE*     1.3    60.2    +      -       -      +
    346B  GLN*     3.0     9.0    +      -       -      +
    347B  VAL*     2.8    40.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 344 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    337B  VAL*     4.1    18.2    -      -       +      -
    340B  SER*     2.8    28.3    +      -       -      +
    343B  THR*     1.3    69.8    -      -       -      +
    345B  PRO*     1.4    64.2    -      -       +      +
    347B  VAL*     3.3     7.1    +      -       +      +
    348B  ARG*     3.0    33.5    +      -       -      +
    379B  PHE*     4.0    25.0    -      -       +      -
    382B  PHE*     4.7    11.7    -      -       +      -
    389B  ILE*     5.6     0.2    -      -       +      -
    391B  TYR*     3.9    35.0    -      -       +      -
    399B  TYR*     3.9    30.5    -      -       +      -
    400B  GLU*     4.5     7.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with PRO 345 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    340B  SER      3.6     2.2    -      -       -      +
    341B  HIS*     3.5    20.6    -      -       -      +
    342B  VAL*     3.3    17.3    -      -       -      +
    344B  ILE*     1.4    93.4    -      -       +      +
    346B  GLN*     1.4    50.2    +      -       -      +
    348B  ARG*     3.5    17.2    +      -       +      +
    349B  GLY*     2.9    30.0    +      -       -      -
    400B  GLU*     6.0     0.2    -      -       -      +
      2C    A      6.4     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 346 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     64B  ALA      4.2     2.3    -      -       -      +
     65B  HIS*     3.1    40.7    +      -       -      +
    142B  VAL*     3.4    26.7    -      -       +      +
    342B  VAL*     3.4    13.9    +      -       +      +
    343B  THR*     3.0    12.7    +      -       -      +
    345B  PRO*     1.4    74.1    -      -       -      +
    347B  VAL*     1.4    66.0    +      -       -      +
    349B  GLY*     3.1    10.4    +      -       -      -
    350B  MET*     3.2    34.3    +      -       +      +
      4C    T      2.7    29.1    +      -       -      -
      5C    G      3.2    14.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 347 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63B  ILE*     4.9     8.7    -      -       +      -
    142B  VAL*     3.6    25.8    -      -       +      -
    145B  ILE*     4.2    18.8    -      -       +      +
    343B  THR*     2.8    34.6    +      -       +      +
    344B  ILE*     3.7     8.1    -      -       +      +
    346B  GLN*     1.4    70.4    -      -       -      +
    348B  ARG*     1.3    62.4    +      -       -      +
    349B  GLY      3.3     0.9    +      -       -      -
    350B  MET*     3.3    18.3    +      -       -      +
    351B  PHE*     4.7     1.2    +      -       -      +
    377B  LEU      4.9     3.8    -      -       -      +
    379B  PHE*     3.9    20.5    +      -       +      +
    382B  PHE*     4.0    33.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 348 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    344B  ILE*     3.0    21.7    +      -       -      +
    345B  PRO*     3.6    14.6    -      -       -      +
    347B  VAL*     1.3    76.5    -      -       -      +
    349B  GLY*     1.3    57.7    +      -       -      +
    350B  MET      3.7     0.3    +      -       -      -
    351B  PHE*     4.6     4.9    +      -       -      +
    352B  ASN*     3.3    20.1    +      -       -      +
    379B  PHE*     3.8    48.4    +      -       +      +
    399B  TYR*     3.9    33.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 349 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    345B  PRO      2.9    15.1    +      -       -      -
    346B  GLN      3.1     5.7    +      -       -      -
    348B  ARG*     1.3    77.5    -      -       -      +
    350B  MET*     1.3    71.9    +      -       -      +
    351B  PHE      3.5     0.7    -      -       -      -
    352B  ASN*     3.6    10.2    +      -       -      +
    353B  GLY*     3.5    14.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with MET 350 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    142B  VAL*     4.3    20.6    -      -       +      -
    145B  ILE*     3.8    23.8    -      -       +      -
    146B  TYR*     3.8    19.9    +      -       +      +
    346B  GLN*     3.2    33.8    +      -       +      +
    347B  VAL*     3.3    13.5    +      -       -      +
    349B  GLY*     1.3    83.1    -      -       -      +
    351B  PHE*     1.3    65.5    +      -       -      +
    353B  GLY*     3.2     8.7    +      -       -      -
    354B  ASP*     3.3    12.6    +      -       -      +
    376B  PRO*     3.9    11.0    -      -       +      -
      5C    G      3.6    28.3    -      -       +      +
      6C    T      3.9    13.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 351 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    347B  VAL      4.7     0.8    +      -       -      +
    348B  ARG      4.6     4.1    +      -       -      +
    349B  GLY      3.5     0.2    -      -       -      -
    350B  MET*     1.3    77.0    -      -       -      +
    352B  ASN*     1.3    78.5    +      -       -      +
    354B  ASP*     3.4     2.1    +      -       -      +
    355B  GLN*     3.0    61.8    +      -       +      +
    375B  ARG*     3.5    35.0    -      -       +      -
    376B  PRO*     3.8    17.6    -      -       +      +
    377B  LEU      3.5    18.7    +      -       -      +
    378B  ARG*     3.3    60.3    -      -       +      -
    379B  PHE      5.3     0.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 352 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    348B  ARG*     3.3    25.1    +      -       -      +
    349B  GLY*     4.1     8.3    -      -       -      +
    350B  MET      3.3     1.0    -      -       -      -
    351B  PHE*     1.3    92.9    -      -       -      +
    353B  GLY*     1.3    61.3    +      -       -      +
    355B  GLN*     3.7     3.6    +      -       -      +
    356B  ALA*     3.1    24.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 353 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    349B  GLY      3.5     6.4    +      -       -      -
    350B  MET      3.2     7.0    +      -       -      -
    352B  ASN*     1.3    75.6    -      -       -      +
    354B  ASP*     1.3    64.2    +      -       -      +
    356B  ALA*     3.3     7.8    +      -       -      +
    357B  ARG*     3.1    30.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 354 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    146B  TYR*     5.2     4.7    -      -       +      +
    350B  MET      3.3     9.1    +      -       -      +
    351B  PHE      3.6     7.9    -      -       -      +
    353B  GLY*     1.3    74.2    -      -       -      +
    355B  GLN*     1.3    59.6    +      -       -      +
    357B  ARG*     3.5    22.2    +      -       -      +
    358B  LYS*     2.9    45.3    +      -       -      +
    376B  PRO*     3.7    29.4    -      -       +      -
      7C    T      5.4     2.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 355 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    351B  PHE*     3.0    58.8    +      -       +      +
    352B  ASN*     4.0     4.0    -      -       -      +
    354B  ASP*     1.3    75.8    -      -       -      +
    356B  ALA*     1.4    52.3    +      -       -      +
    358B  LYS*     3.3     8.5    +      -       -      -
    359B  GLN*     2.7    41.3    +      -       +      +
    372B  LEU*     3.1    49.3    +      -       +      +
    375B  ARG*     3.6    14.4    -      -       -      +
    378B  ARG*     5.6     1.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 356 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    352B  ASN      3.1    20.2    +      -       -      +
    353B  GLY*     3.4     8.7    -      -       -      +
    355B  GLN*     1.4    76.1    -      -       -      +
    357B  ARG*     1.4    60.4    +      -       -      +
    359B  GLN*     3.3     5.6    +      -       -      +
    360B  VAL*     3.1    25.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 357 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98B  PRO*     3.7    27.8    -      -       -      +
     99B  GLU      3.4    25.7    +      -       -      +
    100B  ALA*     4.2    14.1    -      -       +      -
    101B  TYR      5.8     0.3    +      -       -      -
    146B  TYR*     5.8     1.0    +      -       -      -
    353B  GLY      3.1    18.0    +      -       -      +
    354B  ASP*     3.9    21.3    +      -       -      +
    356B  ALA*     1.4    74.3    -      -       -      +
    358B  LYS*     1.3    69.2    +      -       +      +
    359B  GLN      3.4     0.2    +      -       -      -
    360B  VAL*     3.4    12.6    +      -       -      +
    361B  LEU*     3.4    24.5    +      -       +      +
      7C    T      2.8    34.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 358 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    308B  ASN*     4.1    12.8    -      -       -      +
    354B  ASP*     2.9    32.3    +      -       -      +
    355B  GLN*     3.8    15.4    +      -       -      -
    357B  ARG*     1.3    84.7    -      -       +      +
    359B  GLN*     1.3    57.9    +      -       -      +
    361B  LEU*     3.4    18.5    +      -       +      +
    362B  VAL*     3.0    31.4    +      -       -      +
    367B  ARG*     5.8     1.6    -      -       +      -
    371B  ALA*     3.2    36.9    +      -       +      +
    372B  LEU*     3.8    16.2    -      -       +      +
    374B  ASN*     3.1    28.5    +      -       -      -
    375B  ARG*     4.4     1.8    -      -       -      +
      7C    T      5.7     2.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 359 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    355B  GLN*     2.7    24.0    +      -       +      +
    356B  ALA*     3.7     6.7    -      -       -      +
    358B  LYS*     1.3    69.7    -      -       -      +
    360B  VAL*     1.4    59.5    +      -       -      +
    362B  VAL*     3.1    16.2    +      -       -      +
    363B  ASP*     2.9    63.7    +      -       -      +
    369B  PRO*     5.9     0.4    -      -       -      +
    372B  LEU*     3.5    31.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 360 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101B  TYR*     3.9    42.8    -      -       +      +
    103B  PRO*     4.3    11.2    -      -       +      -
    356B  ALA      3.1    17.7    -      -       -      +
    357B  ARG*     3.5    13.9    -      -       -      +
    358B  LYS      3.4     0.2    -      -       -      -
    359B  GLN*     1.4    73.5    -      -       -      +
    361B  LEU*     1.4    62.1    +      -       -      +
    363B  ASP*     3.2    11.4    +      -       -      +
    364B  HIS*     3.0    37.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 361 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99B  GLU*     3.5    39.7    -      -       +      +
    100B  ALA*     4.0    26.0    -      -       -      -
    101B  TYR*     4.0     5.6    -      -       +      +
    108B  PHE*     4.1     5.8    -      -       +      -
    357B  ARG*     3.4    20.7    +      -       +      +
    358B  LYS*     3.6    20.9    -      -       +      +
    359B  GLN      3.3     0.4    -      -       -      -
    360B  VAL*     1.4    75.8    -      -       -      +
    362B  VAL*     1.4    59.1    +      -       -      +
    364B  HIS*     3.5     1.0    +      -       -      -
    365B  GLY      3.3     2.9    +      -       -      -
    366B  PHE*     2.8    61.9    +      -       +      +
    367B  ARG*     4.0    12.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 362 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    270B  GLN*     4.4     6.8    +      -       -      +
    274B  MET*     4.3     8.7    -      -       -      +
    358B  LYS      3.0    20.0    +      -       -      +
    359B  GLN*     3.1    21.1    +      -       -      +
    361B  LEU*     1.4    74.4    -      -       -      +
    363B  ASP*     1.4    64.1    +      -       -      +
    365B  GLY*     3.0    15.9    +      -       -      -
    367B  ARG*     3.5    20.5    -      -       +      +
    368B  LEU      3.6    20.0    -      -       -      +
    369B  PRO*     4.0    25.1    -      -       +      -
    371B  ALA*     4.8     3.1    -      -       +      -
    372B  LEU*     4.0    19.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 363 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    274B  MET*     5.2     0.9    -      -       -      +
    279B  LYS*     3.8    31.9    +      -       -      +
    282B  GLU*     4.0     6.8    -      -       -      +
    359B  GLN*     2.9    45.7    +      -       -      +
    360B  VAL*     3.4    12.5    +      -       -      +
    362B  VAL*     1.4    73.1    -      -       -      +
    364B  HIS*     1.3    69.8    +      -       +      +
    365B  GLY      3.4     0.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with HIS 364 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101B  TYR*     3.5    35.0    +      +       +      -
    103B  PRO*     4.3    13.6    -      -       +      +
    282B  GLU*     3.5    24.8    +      -       -      +
    285B  ARG*     2.8    33.8    +      -       -      +
    360B  VAL*     3.0    32.5    +      -       +      +
    361B  LEU      3.5     0.2    +      -       -      -
    362B  VAL      3.2     0.4    -      -       -      -
    363B  ASP*     1.3    85.5    -      -       +      +
    365B  GLY*     1.3    61.1    +      -       -      +
    366B  PHE*     3.4    21.5    -      -       +      -
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


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

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

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