Contacts of the helix formed by residues 784 - 810 (chain A) in PDB entry 4YOZ


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 ARG 784 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    496A  ILE*     5.9     6.1    -      -       -      +
    531A  PHE*     5.0     0.2    -      -       -      -
    532A  TYR*     3.3    45.6    +      -       -      +
    535A  LYS*     5.7     2.0    -      -       -      +
    577A  ALA*     3.6    31.6    -      -       +      +
    580A  VAL*     5.2     2.0    -      -       +      -
    783A  LYS*     1.3   119.6    -      -       +      +
    785A  THR*     1.3    54.4    +      -       -      +
    786A  GLY      3.3     2.0    -      -       -      -
    787A  SER*     3.5    15.7    +      -       -      -
    788A  LEU*     2.5    40.1    +      -       -      +
   1004A  SO4      3.2    27.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with THR 785 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    581A  SER*     4.4     7.1    +      -       -      -
    781A  ARG*     4.3    15.7    -      -       +      -
    782A  PRO*     2.6    43.6    +      -       +      +
    783A  LYS      3.1     2.6    +      -       -      -
    784A  ARG*     1.3    77.0    -      -       -      +
    786A  GLY*     1.3    59.4    +      -       -      +
    788A  LEU*     3.5     7.8    -      -       -      +
    789A  ALA*     2.9    30.3    +      -       +      +
   1004A  SO4      3.9     1.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 786 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    784A  ARG      3.3     0.6    -      -       -      -
    785A  THR*     1.3    79.8    -      -       -      +
    787A  SER*     1.3    57.2    +      -       -      +
    789A  ALA*     3.3     7.1    +      -       -      +
    790A  LEU*     3.0    30.0    +      -       -      +
   1004A  SO4      3.3    15.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 787 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    531A  PHE*     4.0    18.3    -      -       -      -
    532A  TYR*     5.4     0.9    -      -       -      -
    534A  TYR*     4.4     1.7    +      -       -      -
    535A  LYS*     3.9    23.3    -      -       -      +
    784A  ARG*     3.1    26.8    +      -       -      -
    786A  GLY*     1.3    73.7    -      -       -      +
    788A  LEU*     1.3    64.5    +      -       -      +
    790A  LEU*     4.1     3.8    -      -       -      +
    791A  PHE*     3.0    26.9    +      -       -      +
   1004A  SO4      3.2    28.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 788 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    531A  PHE*     4.4     2.5    -      -       +      -
    574A  LEU*     3.9    23.3    -      -       +      -
    577A  ALA*     3.7    25.1    -      -       +      +
    578A  LEU*     3.8    30.1    -      -       +      -
    581A  SER*     3.4    32.3    -      -       -      +
    584A  LYS      4.5     4.9    -      -       -      +
    586A  PRO*     4.6     9.2    -      -       +      -
    784A  ARG      2.5    21.4    +      -       -      +
    785A  THR*     3.5     6.1    -      -       -      +
    787A  SER*     1.3    71.9    -      -       -      +
    789A  ALA*     1.3    64.1    +      -       -      +
    791A  PHE*     3.9     0.8    -      -       -      +
    792A  TYR*     3.0    39.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 789 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    586A  PRO*     4.9     2.4    -      -       +      +
    591A  VAL*     3.5    26.8    -      -       +      +
    785A  THR*     2.9    19.7    +      -       +      +
    786A  GLY*     3.7     7.6    -      -       -      +
    787A  SER      3.3     0.2    -      -       -      -
    788A  LEU*     1.3    76.5    -      -       -      +
    790A  LEU*     1.3    58.1    +      -       -      +
    793A  ARG*     3.0    30.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 790 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    534A  TYR*     3.4    13.2    -      -       +      +
    535A  LYS*     3.5    34.8    -      -       +      -
    538A  GLU*     5.2     4.9    -      -       -      +
    786A  GLY      3.0    17.8    +      -       -      +
    787A  SER*     4.1     3.1    -      -       -      +
    789A  ALA*     1.3    73.2    -      -       -      +
    791A  PHE*     1.3    66.4    +      -       -      +
    793A  ARG*     3.2    36.3    +      -       -      +
    794A  LYS*     3.0    38.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 791 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    531A  PHE*     3.5    27.8    -      +       +      -
    534A  TYR*     3.1    24.6    +      +       -      +
    562A  ILE*     5.2     0.9    -      -       +      -
    563A  LEU*     3.7    27.4    -      -       +      -
    567A  ALA*     3.6    32.3    -      -       +      -
    568A  TRP*     3.6    37.9    -      +       -      -
    574A  LEU*     4.0    13.9    -      -       +      -
    787A  SER      3.0    19.0    +      -       -      +
    788A  LEU      3.9     2.0    -      -       -      +
    790A  LEU*     1.3    75.0    -      -       -      +
    792A  TYR*     1.3    72.4    +      +       -      +
    794A  LYS*     3.1     6.6    +      -       -      +
    795A  VAL*     2.9    42.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 792 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    568A  TRP*     3.6    33.9    -      +       -      -
    574A  LEU*     4.2     3.5    -      -       +      +
    578A  LEU*     3.6    20.5    -      -       +      +
    585A  VAL*     3.5    31.4    -      -       +      +
    586A  PRO*     3.6    30.7    -      -       +      -
    591A  VAL*     4.6     1.8    -      -       +      -
    788A  LEU*     3.0    44.4    +      -       +      +
    789A  ALA      4.2     1.3    -      -       -      +
    791A  PHE*     1.3    86.5    -      +       -      +
    793A  ARG*     1.3    61.0    +      -       -      +
    795A  VAL*     3.6    10.9    -      -       +      +
    796A  TYR*     2.8    59.2    +      +       +      -
    828A  LEU*     4.6    13.3    +      -       +      -
    832A  PRO*     4.9     1.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 793 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    538A  GLU*     4.6    12.1    +      -       -      -
    591A  VAL*     3.7    33.7    -      -       +      +
    592A  ILE*     4.8    11.8    -      -       +      +
    789A  ALA      3.0    20.3    +      -       -      +
    790A  LEU*     3.2    32.2    +      -       -      +
    792A  TYR*     1.3    77.6    -      -       -      +
    794A  LYS*     1.3    75.8    +      -       -      +
    796A  TYR*     4.0     2.3    -      -       -      +
    797A  HIS*     2.9    38.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 794 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    534A  TYR*     3.7    23.0    +      -       +      -
    535A  LYS*     5.8     1.4    -      -       -      +
    538A  GLU*     3.9    26.2    +      -       -      +
    559A  GLU*     3.3    36.7    +      -       -      -
    563A  LEU*     3.7    22.9    -      -       +      +
    790A  LEU*     3.0    28.1    +      -       +      +
    791A  PHE      3.1     6.7    +      -       -      +
    793A  ARG*     1.3    95.9    -      -       -      +
    795A  VAL*     1.3    61.2    +      -       -      +
    797A  HIS*     3.4    10.3    +      -       +      +
    798A  LEU*     2.9    30.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 795 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    563A  LEU*     4.2    15.7    -      -       +      +
    568A  TRP*     4.0     7.6    -      -       +      -
    791A  PHE*     2.9    52.9    +      -       +      +
    792A  TYR*     3.6    12.1    -      -       +      +
    794A  LYS*     1.3    74.3    -      -       -      +
    796A  TYR*     1.3    60.2    +      -       -      +
    798A  LEU*     3.3     5.4    +      -       -      +
    799A  ALA*     2.9    29.8    +      -       -      +
    824A  PHE*     5.2     0.9    -      -       +      -
    828A  LEU*     3.9    26.7    -      -       +      -
    840A  LEU*     4.0    24.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 796 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    585A  VAL*     4.5     0.2    -      -       -      +
    586A  PRO      2.9    29.1    +      -       -      -
    587A  THR      3.6     1.6    -      -       -      -
    588A  CYS*     3.3    45.4    +      -       +      -
    591A  VAL*     3.7    11.0    -      -       +      -
    592A  ILE*     4.8     3.6    -      -       +      -
    792A  TYR*     2.8    37.1    +      +       +      +
    793A  ARG*     4.0     4.0    -      -       -      +
    795A  VAL*     1.3    73.2    -      -       +      +
    797A  HIS*     1.3    61.6    +      -       -      +
    799A  ALA*     4.7     0.7    -      -       -      -
    800A  SER*     3.1    21.3    +      -       -      -
    821A  TRP*     3.2    30.5    -      +       -      -
    824A  PHE*     4.8     1.8    -      +       -      -
    825A  GLU*     3.8    15.7    -      -       +      +
    828A  LEU*     3.6    31.5    -      -       +      +
    829A  VAL*     3.3    22.0    -      -       -      +
    967A  PRO*     4.9     1.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with HIS 797 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    592A  ILE*     5.9     2.2    -      -       +      +
    793A  ARG*     2.9    28.7    +      -       +      +
    794A  LYS*     3.7    11.9    -      -       +      +
    796A  TYR*     1.3    77.9    -      -       -      +
    798A  LEU*     1.3    63.1    -      -       -      +
    800A  SER*     2.7    22.7    +      -       -      -
    801A  VAL*     3.3    28.2    -      -       +      +
    967A  PRO*     5.3     8.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 798 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    560A  GLU*     3.8    36.6    -      -       +      +
    563A  LEU*     4.0    29.8    -      -       +      -
    564A  GLU      4.6     0.9    -      -       -      +
    794A  LYS      2.9    18.8    +      -       -      +
    795A  VAL      3.3     4.0    +      -       -      +
    797A  HIS*     1.3    80.7    -      -       +      +
    799A  ALA*     1.3    63.5    +      -       -      +
    801A  VAL*     3.3    10.1    +      -       +      +
    802A  ARG*     3.1    62.5    +      -       +      +
    840A  LEU*     4.5    11.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 799 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    795A  VAL      2.9    17.1    +      -       -      +
    796A  TYR      4.1     0.2    -      -       -      +
    798A  LEU*     1.3    78.0    -      -       -      +
    800A  SER*     1.3    57.0    +      -       -      +
    802A  ARG*     3.4     6.5    +      -       -      +
    803A  LEU*     2.8    30.1    +      -       -      +
    821A  TRP*     3.9     7.4    -      -       +      -
    824A  PHE*     3.5    37.2    -      -       +      -
    840A  LEU*     4.3    10.1    -      -       +      +
    844A  LEU*     3.7    12.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 800 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    796A  TYR      3.1    14.6    +      -       -      -
    797A  HIS*     2.7    27.4    +      -       -      -
    799A  ALA*     1.3    75.8    -      -       -      +
    801A  VAL*     1.3    60.5    +      -       -      +
    804A  ARG*     2.9    33.2    +      -       -      +
    821A  TRP*     3.6     9.1    -      -       -      -
    966A  PHE*     3.5    26.4    -      -       -      -
    967A  PRO*     3.8    25.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 801 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    797A  HIS*     3.3    35.9    -      -       +      +
    798A  LEU*     3.3    11.8    +      -       +      +
    800A  SER*     1.3    79.6    +      -       -      +
    802A  ARG*     1.3    65.1    +      -       +      +
    804A  ARG*     3.5     9.1    +      -       -      +
    805A  ASP*     3.2    22.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 802 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    560A  GLU*     3.3    25.3    +      -       -      +
    564A  GLU*     2.8    40.4    +      -       -      +
    798A  LEU*     3.1    40.6    +      -       +      +
    799A  ALA*     3.8     9.0    -      -       -      +
    801A  VAL*     1.3    78.5    -      -       +      +
    803A  LEU*     1.3    64.3    +      -       -      +
    805A  ASP*     3.3     1.8    +      -       -      -
    806A  LEU*     3.1    21.4    +      -       +      +
    840A  LEU*     4.9     2.8    -      -       -      +
    841A  ASP*     2.8    38.9    +      -       -      -
    844A  LEU*     4.0    11.9    -      -       +      -
    871A  GLN*     3.2    29.5    +      -       -      +
    873A  GLN*     3.3    29.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 803 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    799A  ALA      2.8    18.5    +      -       -      +
    800A  SER*     3.9     4.9    -      -       -      +
    802A  ARG*     1.3    75.6    -      -       -      +
    804A  ARG*     1.3    57.6    +      -       -      +
    806A  LEU*     3.4     4.1    +      -       +      -
    807A  CYS*     2.9    45.7    +      -       -      -
    817A  ARG*     3.8    12.8    -      -       +      +
    820A  ILE*     3.7    20.2    -      -       +      -
    821A  TRP*     3.8    42.8    -      -       +      +
    844A  LEU*     3.9    20.1    -      -       +      +
    848A  PHE*     3.8    15.5    -      -       +      -
    966A  PHE*     3.9    10.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 804 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    800A  SER*     2.9    17.0    +      -       -      +
    801A  VAL*     3.7     8.3    -      -       -      +
    802A  ARG      3.3     0.2    -      -       -      -
    803A  LEU*     1.3    78.4    -      -       -      +
    805A  ASP*     1.3    62.8    +      -       -      +
    807A  CYS*     3.6     6.2    +      -       -      +
    808A  LEU*     3.1    24.4    +      -       -      +
    817A  ARG*     3.7    36.7    +      -       -      +
    966A  PHE*     3.2    33.2    +      -       +      -
    967A  PRO      4.0    12.6    +      -       -      -
   1003A  SO4      4.3     7.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 805 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    801A  VAL*     3.2    13.8    +      -       +      +
    802A  ARG*     3.7     8.3    -      -       -      +
    803A  LEU      3.3     0.2    -      -       -      -
    804A  ARG*     1.3    74.3    -      -       -      +
    806A  LEU*     1.3    59.8    +      -       -      +
    808A  LEU*     3.1    11.7    +      -       -      +
    809A  LYS*     2.9    55.6    +      -       -      +
    867A  SER      4.9     0.5    -      -       -      +
    871A  GLN*     3.1    32.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 806 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    802A  ARG*     3.1    15.0    +      -       +      +
    803A  LEU*     3.7     5.4    -      -       -      +
    805A  ASP*     1.3    77.2    -      -       -      +
    807A  CYS*     1.3    57.1    +      -       -      +
    809A  LYS*     3.2     3.0    +      -       -      +
    810A  LEU*     2.8    40.1    +      -       +      +
    844A  LEU*     4.7    15.7    -      -       +      -
    845A  LEU*     3.5    26.5    -      -       +      -
    848A  PHE*     4.0    23.3    -      -       +      -
    864A  ILE*     3.9    10.5    -      -       +      +
    867A  SER*     3.9    12.3    -      -       -      +
    868A  TYR*     3.7    36.8    -      -       +      +
    871A  GLN*     3.5    14.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with CYS 807 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    803A  LEU*     2.9    37.8    +      -       -      +
    804A  ARG      3.8     4.3    -      -       -      +
    806A  LEU*     1.3    76.0    -      -       -      +
    808A  LEU*     1.3    57.8    +      -       -      +
    811A  ASP*     2.8    21.7    +      -       -      -
    812A  VAL*     2.8    35.9    +      -       +      +
    817A  ARG*     3.5    45.1    -      -       +      +
    820A  ILE*     4.7     1.6    -      -       -      -
    848A  PHE*     3.8    12.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 808 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    804A  ARG      3.1    14.8    +      -       -      +
    805A  ASP*     3.3    15.0    -      -       -      +
    806A  LEU      3.1     0.2    -      -       -      -
    807A  CYS*     1.3    77.1    -      -       -      +
    809A  LYS*     1.3    70.6    +      -       +      +
    811A  ASP*     3.0    20.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 809 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    805A  ASP*     2.9    43.1    +      -       -      +
    806A  LEU*     4.0     3.6    -      -       -      +
    808A  LEU*     1.3    84.9    -      -       +      +
    810A  LEU*     1.3    59.3    +      -       -      +
    811A  ASP*     3.3     1.7    +      -       -      +
    867A  SER*     4.1    31.1    +      -       -      +
    870A  ASN*     3.3    41.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 810 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    806A  LEU*     2.8    23.3    +      -       +      +
    809A  LYS*     1.3    75.7    -      -       -      +
    811A  ASP*     1.3    63.2    +      -       -      +
    812A  VAL*     3.8    12.8    -      -       +      -
    848A  PHE*     3.5    31.0    -      -       +      -
    859A  ARG*     2.3    44.9    +      -       +      +
    863A  GLU*     3.6    31.4    -      -       +      +
    864A  ILE*     4.0    18.8    -      -       +      -
    867A  SER*     3.3    26.9    -      -       -      +
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


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

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

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