Contacts of the helix formed by residues 467 - 490 (chain C) in PDB entry 1NYE


Residue contacts within the protein are derived with the CSU software (Sobolev V., Sorokine A., Prilusky J., Abola E.E. and Edelman M. (1999) Automated analysis of interatomic contacts in proteins. Bioinformatics, 15, 327-332). A short description of the analytical approach is given at the end of the page.
For CSU analysis of other PDB entry

Note:
Non-standard 3 letter residue codes indicate a heterogroup. To identify and analyse, use LPC software

Legend:
Dist - nearest distance (Å) between atoms of two residues
Surf - contact surface area (Å2) between two residues
HB   - hydrophilic-hydrophilic contact (hydrogen bond)
Arom - aromatic-aromatic contact
Phob - hydrophobic-hydrophobic contact
DC   - hydrophobic-hydrophilic contact (destabilizing contact)
+/-  - indicates presence/absence of a specific contacts
*    - indicates residues forming contacts  by their side chain
       (including CA atoms)
Residues in contact with ASN 467 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    442C  VAL*     6.6     0.4    -      -       -      -
    454C  TYR*     4.8     4.7    -      -       -      -
    458C  THR*     4.1    10.1    -      -       -      +
    459C  ARG*     4.5     8.7    -      -       +      -
    465C  GLY      3.1    15.4    -      -       -      +
    466C  THR*     1.3    79.0    -      -       -      +
    468C  PRO*     1.3    76.6    -      -       +      +
    469C  GLU*     3.3    13.0    +      -       -      +
    470C  GLU*     2.9    50.6    +      -       -      +
    471C  LEU*     3.2    17.5    +      -       -      +
    625D  LYS*     2.9    39.6    +      -       -      +
    645D  GLU*     4.6     0.3    -      -       -      +
    678D  ALA*     5.8     0.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with PRO 468 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    454C  TYR*     4.8     8.7    -      -       +      -
    459C  ARG*     3.1    41.3    -      -       -      +
    467C  ASN*     1.3    86.2    -      -       +      +
    469C  GLU*     1.3    64.4    +      -       -      +
    471C  LEU*     3.1     5.8    +      -       +      +
    472C  ILE*     3.0    27.6    +      -       -      +
    675D  ALA*     3.6    17.0    -      -       +      +
    678D  ALA*     4.1     9.4    -      -       +      -
    679D  CYS*     3.6    33.7    -      -       +      +
    747D  VAL*     4.1     6.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 469 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    459C  ARG*     2.5    41.3    +      -       -      +
    467C  ASN*     3.2    11.4    +      -       -      +
    468C  PRO*     1.3    78.2    -      -       -      +
    470C  GLU*     1.3    58.7    +      -       -      +
    472C  ILE*     3.3     4.4    +      -       -      +
    473C  GLY      2.9    25.1    +      -       -      -
    504C  VAL*     3.5    32.9    -      -       +      +
    506C  LEU*     3.7    34.1    -      -       +      +
    515C  ILE*     3.6    20.0    -      -       +      +
    623D  ILE*     5.8     2.0    -      -       +      -
    625D  LYS*     3.7    17.3    -      -       +      -
    746D  PRO*     4.7     2.1    -      -       -      +
    747D  VAL*     5.2     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 470 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    465C  GLY      3.7     0.2    -      -       -      +
    466C  THR*     2.9    29.7    -      -       -      +
    467C  ASN*     2.9    29.7    -      -       -      +
    469C  GLU*     1.3    72.4    -      -       -      +
    471C  LEU*     1.3    63.6    +      -       +      +
    473C  GLY*     3.3     1.9    +      -       -      -
    474C  ALA*     3.0    22.7    +      -       -      +
    625D  LYS*     3.8    10.5    -      -       +      +
    626D  LYS      3.9    16.2    -      -       -      +
    627D  GLY*     4.1     3.3    -      -       -      -
    644D  THR*     2.8    31.9    +      -       -      +
    645D  GLU*     3.5     7.3    -      -       -      +
    646D  SER*     2.7    46.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 471 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    442C  VAL*     4.6     8.7    -      -       +      -
    449C  LEU*     4.3    17.7    -      -       +      -
    466C  THR*     3.5    33.7    -      -       +      -
    467C  ASN      3.2     8.6    +      -       -      +
    468C  PRO      3.1     7.9    +      -       -      +
    470C  GLU*     1.3    81.7    -      -       -      +
    472C  ILE*     1.3    66.8    +      -       -      +
    474C  ALA*     3.2     5.4    +      -       -      +
    475C  ALA*     3.0    22.7    +      -       -      +
    644D  THR*     4.1     7.9    -      -       +      +
    648D  VAL*     6.1     0.2    -      -       +      -
    649D  LEU*     4.9    12.1    -      -       +      -
    671D  LEU*     3.9    19.2    -      -       +      +
    674D  ALA*     4.1    21.3    -      -       +      +
    675D  ALA*     3.8    19.5    -      -       +      +
    678D  ALA*     5.6     0.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 472 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    468C  PRO      3.0    15.1    +      -       -      +
    469C  GLU*     3.8     6.5    -      -       -      +
    471C  LEU*     1.3    74.1    -      -       -      +
    473C  GLY*     1.3    65.6    +      -       -      +
    475C  ALA*     3.1     2.8    +      -       -      +
    476C  HIS*     2.8    22.7    +      -       +      +
    504C  VAL*     4.9     4.5    -      -       +      -
    515C  ILE*     4.0    18.6    -      -       +      -
    518C  ILE*     4.5    21.3    -      -       +      -
    551C  LEU*     4.5    18.6    -      -       +      -
    672D  ILE*     4.2    27.5    -      -       +      +
    675D  ALA*     3.7    12.3    -      -       +      -
    747D  VAL*     3.9    35.4    -      -       +      -
    750D  VAL*     5.7     2.9    -      -       +      -
    751D  LEU*     6.1     2.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 473 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    469C  GLU      2.9    11.1    +      -       -      -
    470C  GLU      3.6     3.1    -      -       -      -
    472C  ILE*     1.3    77.3    -      -       -      +
    474C  ALA*     1.3    55.9    +      -       -      +
    476C  HIS*     3.3     3.4    +      -       -      +
    477C  ALA*     2.8    25.5    +      -       -      +
    502C  ALA*     2.9    26.7    -      -       -      +
    504C  VAL*     3.6    21.7    -      -       -      +
    627D  GLY*     4.0     4.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 474 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    470C  GLU      3.0    13.6    +      -       -      +
    471C  LEU*     3.6     9.4    -      -       -      +
    472C  ILE      3.2     0.2    -      -       -      -
    473C  GLY*     1.3    72.7    -      -       -      +
    475C  ALA*     1.3    67.2    +      -       -      +
    477C  ALA*     3.2     2.4    +      -       -      +
    478C  ALA*     2.8    27.1    +      -       -      +
    627D  GLY*     3.7    11.8    -      -       -      -
    628D  GLN      4.4     3.8    -      -       -      +
    629D  ALA*     4.7     0.3    -      -       -      +
    642D  VAL*     4.4     4.9    -      -       +      +
    643D  SER      4.0    18.4    -      -       -      +
    644D  THR*     4.4     7.0    -      -       -      +
    649D  LEU*     4.5    15.5    -      -       +      -
    671D  LEU*     4.4     6.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 475 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    471C  LEU      3.0     6.9    +      -       -      +
    472C  ILE      3.5     7.4    -      -       -      +
    474C  ALA*     1.3    76.1    -      -       -      +
    476C  HIS*     1.3    53.5    +      -       -      +
    478C  ALA*     3.3     2.6    -      -       -      +
    479C  CYS*     2.8    36.2    +      -       -      +
    547C  VAL*     4.5     2.0    -      -       +      -
    668D  PRO*     3.5    35.1    -      -       +      +
    671D  LEU*     3.5    22.1    -      -       +      +
    672D  ILE*     3.6    18.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with HIS 476 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    472C  ILE*     2.8    17.1    +      -       +      +
    473C  GLY*     3.5     7.6    -      -       -      +
    475C  ALA*     1.3    75.2    -      -       -      +
    477C  ALA*     1.3    67.6    +      -       -      +
    479C  CYS      3.3     0.2    +      -       -      -
    480C  PHE*     2.9    23.0    +      -       +      +
    502C  ALA*     4.7     2.5    -      -       +      -
    518C  ILE*     3.7    16.5    -      -       +      +
    520C  LEU*     3.8    18.3    -      -       +      +
    545C  CYS*     4.1     6.3    -      -       -      -
    547C  VAL*     3.7    26.4    -      -       +      +
    548C  SER*     2.6    31.1    +      -       -      -
    551C  LEU*     3.5    25.4    -      -       +      +
    555C  ILE*     3.8    26.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 477 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    473C  GLY      2.8    19.4    +      -       -      +
    474C  ALA      3.8     2.7    -      -       -      +
    476C  HIS*     1.3    73.3    -      -       -      +
    478C  ALA*     1.3    64.3    +      -       -      +
    480C  PHE*     3.7     4.0    -      -       -      +
    481C  SER*     2.9    27.5    +      -       -      -
    500C  THR*     3.5    19.4    +      -       -      +
    501C  THR      4.5     0.4    -      -       -      -
    502C  ALA*     4.0    13.6    -      -       +      +
    520C  LEU*     4.7     4.0    -      -       -      -
    627D  GLY      4.2     0.9    -      -       -      +
    628D  GLN      3.9     4.7    -      -       -      -
    629D  ALA*     3.3    26.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 478 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    474C  ALA      2.8    18.1    +      -       -      +
    475C  ALA*     3.3     6.3    -      -       -      +
    477C  ALA*     1.3    79.3    -      -       -      +
    479C  CYS*     1.3    67.7    +      -       -      +
    482C  MET*     3.2     7.3    +      -       -      +
    629D  ALA*     3.1     5.7    -      -       -      +
    642D  VAL*     3.3    26.5    -      -       +      -
    654D  TYR*     2.7    38.0    +      -       +      -
    667D  ASN      5.8     0.2    -      -       -      -
    668D  PRO*     4.3     8.7    -      -       +      -
    671D  LEU*     5.3     1.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with CYS 479 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    475C  ALA      2.8    12.9    +      -       -      +
    476C  HIS      3.8     1.8    -      -       -      +
    478C  ALA*     1.3    69.9    -      -       -      +
    480C  PHE*     1.3    63.8    +      -       -      +
    482C  MET*     2.8    17.2    +      -       -      +
    483C  ALA*     2.9    11.8    +      -       -      -
    545C  CYS*     3.5    12.3    -      -       -      -
    546C  PRO*     3.4    33.4    -      -       -      -
    547C  VAL*     3.3    33.7    -      -       +      -
    659D  ARG*     3.6    20.4    -      -       -      +
    668D  PRO*     3.8    13.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 480 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    476C  HIS*     2.9    25.0    +      -       +      +
    477C  ALA*     3.7     3.4    -      -       -      +
    479C  CYS*     1.3    74.0    -      -       -      +
    481C  SER*     1.3    60.5    +      -       -      +
    483C  ALA*     3.4     1.2    +      -       -      +
    484C  LEU*     2.8    46.0    +      -       +      +
    500C  THR*     4.1    25.1    -      -       +      -
    520C  LEU*     4.2    18.4    -      -       +      -
    522C  SER*     4.4     9.2    -      -       -      -
    538C  ILE*     3.8    26.9    -      -       +      -
    541C  ALA*     3.0    33.0    -      -       +      -
    542C  LYS*     3.5    24.0    -      -       +      -
    545C  CYS*     4.0    18.3    -      -       -      -
    557C  LEU*     4.6    12.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 481 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    477C  ALA      2.9    20.8    +      -       -      -
    478C  ALA      3.6     4.5    -      -       -      -
    480C  PHE*     1.3    76.8    -      -       -      +
    482C  MET*     1.3    63.4    +      -       -      +
    484C  LEU*     3.4     3.3    +      -       -      +
    485C  SER*     3.1    22.3    +      -       -      -
    498C  ILE*     3.7    19.4    -      -       -      +
    500C  THR*     3.2    27.9    +      -       -      +
    629D  ALA*     3.9    10.7    +      -       -      +
    630D  HIS      4.8     0.4    -      -       -      -
    631D  TRP*     4.2    13.0    -      -       -      -
    654D  TYR*     3.8     9.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with MET 482 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    478C  ALA      3.2     6.9    +      -       -      +
    479C  CYS*     2.8    15.1    +      -       -      +
    481C  SER*     1.3    71.2    -      -       -      +
    483C  ALA*     1.3    67.8    +      -       -      +
    485C  SER*     3.0     5.9    +      -       -      -
    486C  LEU*     2.9    21.8    +      -       +      +
    631D  TRP*     3.6    34.1    -      -       +      -
    635D  ILE*     4.8    11.0    -      -       +      +
    654D  TYR*     3.6    26.8    +      -       +      -
    655D  GLY      3.7    24.0    -      -       -      +
    656D  PHE*     3.9     7.0    -      -       +      +
    659D  ARG*     3.6    38.6    -      -       +      +
    660D  PHE*     4.2    12.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 483 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    479C  CYS*     2.9     7.3    +      -       -      +
    480C  PHE      3.6     5.2    -      -       -      +
    482C  MET*     1.3    75.8    -      -       -      +
    484C  LEU*     1.3    64.5    +      -       -      +
    486C  LEU*     3.0    12.0    +      -       -      +
    487C  MET*     2.8    27.4    +      -       +      +
    541C  ALA*     4.0    10.5    -      -       +      -
    545C  CYS*     3.6    34.1    -      -       +      -
    546C  PRO*     5.0     5.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 484 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    480C  PHE*     2.8    34.2    +      -       +      +
    481C  SER*     3.5     6.3    -      -       -      +
    482C  MET      3.1     0.2    +      -       -      -
    483C  ALA*     1.3    71.6    -      -       -      +
    485C  SER*     1.3    65.9    +      -       -      +
    487C  MET*     2.9    14.6    +      -       -      +
    488C  LEU*     3.0    23.1    +      -       +      +
    498C  ILE*     3.5    23.6    -      -       +      -
    524C  VAL*     3.7    19.7    -      -       +      -
    534C  PHE*     5.3     0.2    -      -       +      -
    537C  ILE*     3.7    15.7    -      -       +      -
    538C  ILE*     3.3    48.9    -      -       +      -
    541C  ALA*     3.7    10.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 485 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    481C  SER      3.1     7.4    +      -       -      -
    482C  MET      3.0     8.6    +      -       -      -
    484C  LEU*     1.3    78.3    -      -       -      +
    486C  LEU*     1.3    57.2    +      -       -      +
    488C  LEU*     3.3     4.3    +      -       -      +
    489C  GLY      3.0    18.4    +      -       -      -
    493C  PHE      4.9     0.2    -      -       -      +
    495C  PRO*     4.0    18.9    -      -       -      +
    498C  ILE*     4.1     1.3    -      -       -      +
    631D  TRP*     3.2    27.5    +      -       -      -
    633D  GLY      2.9    23.7    +      -       -      -
    635D  ILE*     2.9    25.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 486 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    482C  MET*     2.9    12.2    +      -       +      +
    483C  ALA*     3.1    15.0    -      -       -      +
    485C  SER*     1.3    77.5    -      -       -      +
    487C  MET*     1.3    68.4    +      -       -      +
    489C  GLY*     2.9    17.0    +      -       -      -
    490C  GLU*     3.1    41.0    +      -       +      +
    635D  ILE*     3.2    36.3    -      -       +      +
    656D  PHE*     5.9     1.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 487 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    483C  ALA*     2.8    22.8    +      -       +      +
    484C  LEU*     2.9     3.8    +      -       -      +
    486C  LEU*     1.3    78.9    -      -       -      +
    488C  LEU*     1.3    63.1    +      -       -      +
    490C  GLU*     3.3    30.4    +      -       -      +
    491C  ALA*     3.3    12.0    +      -       -      +
    537C  ILE*     3.4    28.8    -      -       +      +
    540C  LYS*     3.1    48.2    -      -       +      +
    541C  ALA*     3.7    18.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 488 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    484C  LEU*     3.0    29.4    +      -       +      +
    485C  SER      3.6     5.8    -      -       -      +
    487C  MET*     1.3    76.0    -      -       -      +
    489C  GLY*     1.3    58.4    +      -       -      +
    491C  ALA*     3.0    17.4    +      -       +      +
    492C  GLY      3.0     0.2    +      -       -      -
    493C  PHE*     2.9    37.4    +      -       +      +
    495C  PRO*     3.6    36.1    -      -       +      -
    498C  ILE*     4.6     1.3    -      -       +      -
    524C  VAL*     4.8     0.2    -      -       +      -
    526C  VAL*     3.9    14.6    -      -       +      -
    529C  ILE*     4.0    22.4    -      -       +      -
    534C  PHE*     4.3    10.5    -      -       +      -
    537C  ILE*     3.4    30.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 489 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    485C  SER      3.0    10.6    +      -       -      -
    486C  LEU      2.9     9.5    +      -       -      -
    488C  LEU*     1.3    73.3    -      -       -      +
    490C  GLU*     1.3    57.7    +      -       -      +
    491C  ALA      2.9     8.7    +      -       -      -
    492C  GLY*     3.2    13.3    +      -       -      -
    493C  PHE      3.5     9.2    +      -       -      -
    494C  THR*     5.7     0.9    -      -       -      -
    634D  ASP*     6.1     1.3    -      -       -      -
    635D  ILE*     4.4    10.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 490 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    486C  LEU*     3.1    37.8    +      -       +      +
    487C  MET*     3.3    22.9    +      -       -      +
    489C  GLY*     1.3    75.2    -      -       -      +
    491C  ALA*     1.3    57.8    +      -       -      +
----------------------------------------------------------
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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