Contacts of the helix formed by residues 404 - 426 (chain K) in PDB entry 4UJ3


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 SER 404 (chain K).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    296E  GLU*     5.0     5.0    +      -       -      -
    379K  CYS*     4.0    18.1    -      -       -      +
    382K  THR*     4.1     4.4    +      -       -      -
    384K  GLN*     5.7     4.5    -      -       -      -
    386K  LYS*     5.4     7.2    -      -       -      -
    388K  CYS*     3.5    10.0    -      -       -      -
    403K  ILE*     1.3    78.0    -      -       -      +
    405K  PRO*     1.3    71.1    -      -       -      +
    406K  PHE*     3.8     7.2    +      -       -      +
    407K  CYS*     2.9    35.2    +      -       -      -
    408K  ARG*     2.9    26.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with PRO 405 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    296E  GLU*     5.5     0.7    -      -       -      +
    386K  LYS*     4.9    16.8    -      -       +      -
    387K  SER      4.0    20.9    -      -       -      +
    388K  CYS*     5.0     0.7    -      -       -      -
    389K  LYS      5.7     0.9    -      -       -      +
    390K  HIS*     5.3     8.9    -      -       +      -
    403K  ILE      3.9     0.6    -      -       -      +
    404K  SER*     1.3    88.4    -      -       -      +
    406K  PHE*     1.3    62.5    +      -       +      +
    408K  ARG*     3.3     9.2    +      -       +      +
    409K  TYR*     3.2    23.0    +      -       -      +
    456K  PHE*     4.0    15.3    -      -       +      -
    457K  LYS      4.8     1.7    -      -       -      +
    458K  GLU*     3.2    32.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 406 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    296E  GLU*     3.6    51.6    -      -       +      +
    297E  ALA      4.7     5.8    -      -       -      -
    298E  ASP*     4.7     5.8    -      -       +      -
    382K  THR*     5.4     8.1    -      -       +      -
    404K  SER*     3.2     4.2    -      -       -      +
    405K  PRO*     1.3    82.1    -      -       -      +
    407K  CYS*     1.3    71.1    +      -       -      +
    409K  TYR*     3.4     3.1    +      -       -      +
    410K  ARG*     3.2    67.6    +      -       +      +
    451K  ALA      3.9     3.6    -      -       -      -
    454K  GLY*     3.4    29.8    -      -       -      -
    456K  PHE*     3.5    36.3    -      +       +      -
----------------------------------------------------------
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Residues in contact with CYS 407 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    335K  PHE*     3.3    38.1    -      -       +      -
    379K  CYS*     3.7    20.4    -      -       -      -
    381K  LEU*     4.1     6.3    -      -       +      -
    382K  THR*     3.8    10.1    -      -       -      -
    403K  ILE*     3.3    19.3    -      -       +      -
    404K  SER*     2.9    27.1    +      -       -      +
    406K  PHE*     1.3    81.5    -      -       -      +
    408K  ARG*     1.3    63.9    +      -       -      +
    410K  ARG*     3.3     3.4    +      -       -      +
    411K  ILE*     2.9    28.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 408 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    130J  HIS      4.2    10.3    +      -       -      -
    131J  LEU*     4.9    12.9    +      -       -      +
    132J  ARG      5.5     2.6    +      -       -      -
    355K  ILE*     4.4    13.2    -      -       +      +
    390K  HIS*     3.3    54.5    +      -       +      -
    403K  ILE*     3.8     9.8    -      -       +      +
    404K  SER      2.9    12.0    +      -       -      +
    405K  PRO*     3.6    11.6    +      -       +      +
    406K  PHE      3.2     0.2    -      -       -      -
    407K  CYS*     1.3    77.0    -      -       -      +
    409K  TYR*     1.3    61.1    +      -       -      +
    411K  ILE*     3.2     4.3    +      -       -      +
    412K  THR*     2.8    63.4    +      -       +      +
    457K  LYS      5.7     4.4    +      -       -      -
    458K  GLU*     6.2     2.4    -      -       -      +
    459K  GLU      6.0     5.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 409 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    405K  PRO      3.2     8.7    +      -       -      +
    406K  PHE      3.8     3.6    -      -       -      +
    408K  ARG*     1.3    84.3    -      -       -      +
    410K  ARG*     1.3    58.4    +      -       -      +
    412K  THR*     3.3     7.0    +      -       -      -
    413K  SER*     2.7    48.0    +      -       -      -
    447K  GLU*     2.2    42.7    +      -       -      -
    450K  LEU*     5.2     4.6    -      -       +      +
    451K  ALA*     3.8    20.6    -      -       +      -
    455K  TYR      4.1     8.2    +      -       -      -
    456K  PHE*     3.5    26.2    -      -       +      -
    457K  LYS*     3.0    62.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 410 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    298E  ASP*     3.2    26.2    +      -       -      +
    331K  PRO      2.7    30.3    +      -       -      -
    332K  CYS*     3.0    31.1    +      -       -      +
    333K  LEU*     5.2     0.7    -      -       -      -
    334K  THR      3.7    15.6    +      -       -      -
    335K  PHE*     4.2    14.8    -      -       +      -
    382K  THR*     5.7     2.0    -      -       -      +
    406K  PHE*     3.2    54.9    +      -       +      +
    407K  CYS      3.7     6.1    -      -       -      +
    409K  TYR*     1.3    80.4    -      -       +      +
    411K  ILE*     1.3    62.1    +      -       -      +
    413K  SER*     3.7     2.6    -      -       -      -
    414K  VAL*     3.2    27.9    +      -       -      +
    451K  ALA*     3.6    33.8    +      -       +      +
    452K  LYS      4.0     8.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 411 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    333K  LEU*     4.5    14.4    -      -       +      -
    335K  PHE*     4.4    11.2    -      -       +      -
    344K  VAL*     4.5     8.3    -      -       +      -
    348K  VAL*     4.7     6.7    -      -       +      -
    353K  LEU*     3.3    31.6    -      -       +      -
    355K  ILE*     4.2     8.3    -      -       +      -
    381K  LEU*     3.7    27.1    -      -       +      -
    392K  ILE*     4.4    25.4    -      -       +      -
    403K  ILE*     5.1     1.6    -      -       +      -
    407K  CYS*     2.9    22.8    +      -       +      +
    408K  ARG*     3.8     4.5    -      -       -      +
    410K  ARG*     1.3    75.2    -      -       -      +
    412K  THR*     1.3    67.1    +      -       -      +
    414K  VAL*     3.1     5.9    +      -       -      +
    415K  CYS*     3.1    22.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with THR 412 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    130J  HIS*     4.0    20.0    -      -       +      +
    131J  LEU*     4.2    15.3    -      -       +      -
    355K  ILE*     4.0    15.7    -      -       +      -
    408K  ARG*     2.8    56.5    +      -       +      +
    409K  TYR*     3.3    12.0    +      -       -      -
    411K  ILE*     1.3    73.0    -      -       -      +
    413K  SER*     1.3    61.8    +      -       -      +
    415K  CYS*     3.2     3.8    +      -       -      +
    416K  ASN*     2.9    38.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 413 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    409K  TYR*     2.7    42.8    +      -       -      -
    410K  ARG*     3.7     6.5    -      -       -      -
    411K  ILE      3.2     0.2    -      -       -      -
    412K  THR*     1.3    81.9    +      -       -      +
    414K  VAL*     1.3    61.1    +      -       -      +
    416K  ASN*     3.6    12.8    +      -       -      +
    417K  PHE*     3.4    14.2    +      -       -      +
    444K  LEU*     4.7     4.5    -      -       -      +
    447K  GLU*     4.3     9.3    +      -       -      +
    448K  MET*     3.7    33.8    -      -       -      +
    451K  ALA*     4.8     1.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 414 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    329K  ILE*     3.7    20.6    -      -       +      +
    332K  CYS*     3.8    24.2    -      -       +      -
    333K  LEU*     4.1    18.2    -      -       +      -
    348K  VAL*     4.4     8.1    -      -       +      -
    410K  ARG      3.2    17.0    -      -       -      +
    411K  ILE      3.1     5.7    +      -       -      +
    413K  SER*     1.3    73.9    -      -       -      +
    415K  CYS*     1.3    66.6    +      -       -      +
    417K  PHE*     3.0    12.6    +      -       -      +
    418K  PHE*     3.2    41.2    +      -       +      -
    448K  MET*     3.7    20.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with CYS 415 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    130J  HIS*     3.5    35.4    -      -       +      +
    348K  VAL*     3.6    29.8    -      -       -      -
    353K  LEU*     3.7    28.7    -      -       -      -
    411K  ILE*     3.1    16.9    +      -       -      +
    412K  THR      3.6     3.1    -      -       -      +
    414K  VAL*     1.3    77.1    -      -       -      +
    416K  ASN*     1.3    50.3    +      -       -      +
    418K  PHE*     3.3     3.9    +      -       -      +
    419K  THR*     2.7    41.6    +      -       -      -
    422K  ARG*     4.9     0.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 416 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    130J  HIS*     3.1    20.3    +      -       -      -
    131J  LEU*     3.8    15.9    -      -       -      +
    412K  THR*     2.9    28.5    +      -       -      +
    413K  SER*     3.7     9.0    +      -       -      +
    414K  VAL      3.2     0.2    -      -       -      -
    415K  CYS*     1.3    73.2    -      -       -      +
    417K  PHE*     1.3    64.9    +      -       -      +
    419K  THR*     3.4     7.8    +      -       -      +
    420K  TYR*     3.0    23.7    +      -       -      +
    444K  LEU*     3.5    23.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 417 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    320K  PHE*     4.3     0.2    -      +       -      -
    321K  LEU*     3.8    19.1    -      -       +      -
    324K  ILE*     3.8    38.6    -      -       +      -
    325K  TYR*     5.9     0.4    -      +       -      -
    329K  ILE*     4.3    16.6    -      -       +      -
    413K  SER      3.4     4.7    +      -       -      +
    414K  VAL      3.0     9.4    +      -       -      +
    416K  ASN*     1.3    79.8    -      -       -      +
    418K  PHE*     1.3    78.1    +      +       -      +
    420K  TYR*     3.2     4.7    +      +       -      +
    421K  ILE*     2.9    58.5    +      -       +      +
    441K  VAL*     4.2    13.5    -      -       +      -
    444K  LEU*     3.8    24.1    -      -       +      +
    445K  ARG*     4.9     1.8    -      -       +      -
    448K  MET*     4.1    25.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 418 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    314K  MET*     4.2    24.7    -      -       +      -
    321K  LEU*     6.1     3.4    -      -       +      -
    325K  TYR*     3.3    36.8    -      +       -      -
    329K  ILE*     4.0    15.5    -      -       +      -
    333K  LEU*     6.2     0.2    -      -       +      -
    345K  LEU*     5.2     1.3    -      -       +      -
    348K  VAL*     3.6    23.6    -      -       +      +
    349K  GLU*     3.9    24.7    -      -       +      -
    414K  VAL*     3.2    41.6    +      -       +      -
    415K  CYS*     3.6     7.9    -      -       -      +
    417K  PHE*     1.3    90.4    -      +       -      +
    419K  THR*     1.3    57.2    +      -       -      +
    421K  ILE*     3.2     5.0    +      -       +      +
    422K  ARG*     2.8    50.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 419 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128J  LEU*     4.8     8.7    -      -       +      +
    130J  HIS*     3.4    21.5    -      -       +      +
    415K  CYS      2.7    26.1    +      -       -      -
    416K  ASN*     3.4    11.0    -      -       -      +
    417K  PHE      3.2     0.2    -      -       -      -
    418K  PHE*     1.3    74.3    -      -       -      +
    420K  TYR*     1.3    57.2    +      -       -      +
    422K  ARG*     4.0    18.3    +      -       -      +
    423K  TYR*     3.1    66.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 420 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     38J  LEU*     6.1     2.0    -      -       +      -
    416K  ASN      3.0    15.3    +      -       -      +
    417K  PHE*     3.8     4.0    -      +       +      +
    419K  THR*     1.3    75.6    -      -       +      +
    421K  ILE*     1.3    68.8    +      -       +      +
    423K  TYR*     3.2    16.4    +      +       +      +
    424K  ILE*     3.0    52.8    +      -       +      +
    429K  VAL*     4.4     8.5    -      -       +      +
    432K  GLN*     2.9    25.6    +      -       -      -
    437K  MET*     3.4    33.1    -      -       -      +
    440K  GLU*     3.1    47.2    -      -       +      +
    441K  VAL*     4.0    11.2    -      -       +      -
    444K  LEU*     4.4    13.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 421 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    308K  TRP*     3.3    40.0    -      -       +      -
    314K  MET*     3.7    24.5    -      -       +      -
    320K  PHE*     3.8    21.1    -      -       +      -
    321K  LEU*     4.8     7.0    -      -       +      -
    417K  PHE*     2.9    47.9    +      -       +      +
    418K  PHE*     3.6     7.0    -      -       +      +
    420K  TYR*     1.3    81.0    -      -       +      +
    422K  ARG*     1.3    58.4    +      -       -      +
    424K  ILE*     2.9    26.8    +      -       +      +
    425K  GLN*     3.0    11.6    +      -       -      +
    441K  VAL*     5.0     4.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 422 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    130J  HIS*     5.9     0.2    -      -       -      -
    314K  MET*     3.6    28.2    -      -       +      +
    348K  VAL      4.9     2.6    +      -       -      -
    349K  GLU      4.5    11.9    +      -       -      -
    351K  ASN*     3.4    45.6    +      -       -      +
    415K  CYS      4.9     0.6    +      -       -      -
    418K  PHE*     2.8    31.1    +      -       -      +
    419K  THR*     4.0    26.6    +      -       -      +
    421K  ILE*     1.3    68.4    -      -       -      +
    423K  TYR*     1.3    75.7    +      -       -      +
    424K  ILE      3.0     1.7    +      -       -      -
    425K  GLN*     3.1    10.6    +      -       -      +
    426K  GLN*     2.9    46.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 423 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     38J  LEU*     3.9    37.9    -      -       +      -
    127J  ASP*     3.3    22.3    +      -       -      -
    128J  LEU*     3.4    16.7    -      -       +      +
    156J  LEU*     4.0    21.3    -      -       +      -
    200J  GNP      3.5     5.9    +      -       -      -
    419K  THR*     3.1    43.5    +      -       +      +
    420K  TYR*     3.2    18.4    +      +       +      +
    422K  ARG*     1.3    85.2    -      -       +      +
    424K  ILE*     1.3    57.6    +      -       -      +
    426K  GLN*     4.3    15.7    -      -       -      -
    427K  GLY*     2.7    25.8    +      -       -      -
    428K  LEU*     3.2    14.7    -      -       +      +
    429K  VAL*     3.5     9.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 424 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    305K  PHE*     4.7     7.9    -      -       +      -
    308K  TRP*     3.6    30.3    -      -       +      -
    309K  LYS*     5.0     7.2    -      -       +      +
    312K  PRO*     4.6    11.3    -      -       +      +
    420K  TYR*     3.1    45.8    -      -       +      +
    421K  ILE*     2.9    14.8    +      -       +      +
    423K  TYR*     1.3    78.4    -      -       -      +
    425K  GLN*     1.3    61.5    +      -       -      +
    427K  GLY*     3.0    14.9    +      -       -      -
    429K  VAL*     4.0    12.5    -      -       +      +
    437K  MET*     3.3    31.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 425 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    308K  TRP*     5.0     1.8    -      -       +      -
    312K  PRO*     3.9    38.0    +      -       +      +
    313K  THR*     5.3     0.9    -      -       -      +
    314K  MET*     4.2    26.6    -      -       +      +
    421K  ILE      3.0    11.6    +      -       -      +
    422K  ARG*     3.1    12.3    +      -       -      +
    424K  ILE*     1.3    76.5    -      -       -      +
    426K  GLN*     1.3    68.1    +      -       -      +
    427K  GLY      3.1     1.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 426 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    156J  LEU*     5.7     3.8    -      -       -      +
    422K  ARG*     2.9    43.9    +      -       -      +
    423K  TYR*     4.5     8.9    -      -       -      -
    425K  GLN*     1.3    83.7    -      -       -      +
    427K  GLY*     1.3    64.1    +      -       -      +
    428K  LEU*     3.1    33.6    +      -       +      +
----------------------------------------------------------
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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