Contacts of the helix formed by residues 710 - 736 (chain A) in PDB entry 1ZUC


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 THR 710 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    708A  PRO      3.8     4.8    +      -       -      +
    709A  ASP*     1.3    78.6    -      -       -      +
    711A  SER*     1.3    66.4    +      -       -      +
    712A  SER*     3.6    10.0    +      -       -      -
    713A  SER*     3.1    26.6    +      -       -      -
    714A  LEU*     3.0    26.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 711 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    710A  THR*     1.3    74.7    -      -       -      +
    712A  SER*     1.3    60.9    +      -       -      +
    714A  LEU*     3.8     8.1    -      -       -      +
    715A  LEU*     3.1    40.9    +      -       -      +
    791A  GLU*     4.3    24.5    -      -       -      +
    794A  PHE*     5.0     9.4    -      -       -      +
    890A  TYR*     5.3     1.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 712 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    710A  THR*     3.2     9.7    +      -       -      -
    711A  SER*     1.3    81.4    -      -       -      +
    713A  SER*     1.3    59.3    +      -       -      +
    715A  LEU*     3.4     2.3    +      -       -      +
    716A  THR*     2.9    33.8    +      -       -      -
    901A  LEU      3.2    26.5    -      -       -      -
    902A  SER*     3.8    18.8    +      -       -      -
    903A  VAL*     4.1     9.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 713 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    703A  HIS*     4.5     5.5    +      -       -      -
    704A  ASP*     6.1     1.6    -      -       -      -
    708A  PRO      4.8     1.5    +      -       -      -
    709A  ASP*     3.8     9.9    -      -       -      +
    710A  THR*     3.1    32.3    +      -       -      -
    712A  SER*     1.3    82.4    +      -       -      +
    714A  LEU*     1.3    59.7    +      -       -      +
    716A  THR*     3.6     7.7    +      -       -      +
    717A  SER*     3.0    30.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 714 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    703A  HIS*     4.9     6.5    -      -       -      +
    709A  ASP*     4.2    18.6    -      -       +      +
    710A  THR      3.0    16.8    +      -       -      +
    711A  SER*     3.8     7.2    -      -       -      +
    713A  SER*     1.3    76.8    +      -       -      +
    715A  LEU*     1.3    59.3    +      -       -      +
    717A  SER*     3.2     4.1    +      -       -      -
    718A  LEU*     3.0    34.8    +      -       +      +
    782A  LEU*     3.8    21.8    -      -       +      -
    784A  LEU*     3.8    30.5    -      -       +      -
    788A  ARG*     3.6    25.8    -      -       -      +
    794A  PHE*     3.9    28.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 715 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    201A  T98      3.9    35.2    -      -       +      +
    711A  SER*     3.1    29.6    +      -       -      +
    712A  SER*     3.9     2.2    -      -       -      +
    714A  LEU*     1.3    72.4    -      -       +      +
    716A  THR*     1.3    60.0    +      -       -      +
    718A  LEU*     3.2     6.8    +      -       +      +
    719A  ASN*     2.9    34.5    +      -       -      +
    794A  PHE*     4.0    19.1    -      -       +      -
    890A  TYR*     3.8    23.3    -      -       +      +
    894A  THR*     4.5    11.4    -      -       +      +
    901A  LEU*     5.9     2.5    -      -       +      -
    903A  VAL*     3.8    30.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 716 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    712A  SER      2.9    20.9    +      -       -      -
    713A  SER*     3.6     8.9    -      -       -      +
    715A  LEU*     1.3    75.7    -      -       -      +
    717A  SER*     1.3    58.9    +      -       -      +
    719A  ASN*     3.2     3.3    +      -       -      +
    720A  GLN*     3.0    28.8    +      -       +      +
    902A  SER      3.8     4.0    +      -       -      -
    903A  VAL*     3.6     4.1    -      -       -      +
    904A  GLU*     3.1    59.3    +      -       +      +
    906A  PRO*     5.6     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 717 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    701A  ALA*     4.0     6.5    +      -       -      +
    702A  GLY      5.2     0.5    +      -       -      -
    703A  HIS*     2.6    48.1    -      -       -      +
    704A  ASP*     4.2     4.7    +      -       -      -
    713A  SER      3.0    15.0    +      -       -      -
    714A  LEU*     3.2     5.8    +      -       -      -
    716A  THR*     1.3    76.1    -      -       -      +
    718A  LEU*     1.3    57.3    -      -       -      +
    720A  GLN*     3.2     7.4    +      -       -      +
    721A  LEU*     2.9    29.6    +      -       -      +
    782A  LEU*     4.0    11.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 718 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    201A  T98      3.5    49.0    -      -       +      +
    714A  LEU*     3.0    21.1    +      -       +      +
    715A  LEU*     3.2    11.2    +      -       +      +
    717A  SER*     1.3    73.3    -      -       -      +
    719A  ASN*     1.3    61.4    +      -       -      +
    721A  LEU*     4.2     3.8    -      -       +      -
    722A  GLY*     2.8    23.6    +      -       -      -
    778A  PHE*     3.3    48.5    -      -       +      -
    782A  LEU*     4.0    13.0    -      -       +      -
    784A  LEU*     5.3     0.4    -      -       +      -
    794A  PHE*     3.9    33.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 719 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    201A  T98      2.8    32.6    +      -       -      -
    715A  LEU      2.9    13.1    +      -       -      +
    716A  THR      3.2     1.8    +      -       -      +
    718A  LEU*     1.3    75.9    -      -       -      +
    720A  GLN*     1.3    53.6    +      -       -      +
    722A  GLY*     3.2     1.4    +      -       -      -
    723A  GLU      2.8    28.2    +      -       -      -
    903A  VAL*     3.3    24.7    -      -       -      +
    904A  GLU      3.1    28.8    +      -       -      +
    905A  PHE*     3.4    24.7    -      -       -      -
    906A  PRO*     3.7    19.8    -      -       +      +
    909A  MET*     3.7    12.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 720 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    701A  ALA      3.3    20.4    -      -       -      +
    702A  GLY      5.8     0.2    -      -       -      +
    716A  THR*     3.0    15.4    +      -       +      +
    717A  SER*     3.2    10.3    +      -       -      +
    719A  ASN*     1.3    71.5    -      -       -      +
    721A  LEU*     1.3    66.0    +      -       -      +
    723A  GLU*     3.1    16.3    +      -       -      +
    724A  ARG*     2.9    53.2    +      -       -      +
    906A  PRO*     3.9    21.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 721 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    201A  T98      4.0    12.3    -      -       -      +
    699A  ILE*     3.8    22.4    -      -       +      +
    700A  TYR      3.8     6.5    -      -       -      +
    701A  ALA*     3.7    33.8    +      -       +      +
    717A  SER      2.9    15.7    +      -       -      +
    718A  LEU*     3.7     4.9    -      -       +      +
    720A  GLN*     1.3    78.5    -      -       -      +
    722A  GLY*     1.3    55.7    +      -       -      +
    724A  ARG*     3.2     4.4    +      -       -      +
    725A  GLN*     2.9    51.6    +      -       -      +
    778A  PHE*     3.6    42.2    -      -       +      +
    779A  ALA*     4.0     5.2    -      -       +      -
    782A  LEU*     4.5     3.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 722 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    201A  T98      4.2     2.6    -      -       -      -
    718A  LEU      2.8    21.4    +      -       -      -
    719A  ASN      3.2     3.1    +      -       -      -
    720A  GLN      3.2     0.2    -      -       -      -
    721A  LEU*     1.3    73.2    -      -       -      +
    723A  GLU*     1.3    56.3    +      -       -      +
    726A  LEU*     2.9    27.9    +      -       -      +
    759A  MET*     3.2    29.6    -      -       -      +
    909A  MET*     3.5    15.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 723 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    719A  ASN      2.8    16.0    +      -       -      +
    720A  GLN*     3.1    15.4    +      -       -      +
    722A  GLY*     1.3    73.8    -      -       -      +
    724A  ARG*     1.3    62.5    +      -       +      +
    726A  LEU*     3.4     5.1    +      -       -      +
    727A  LEU*     3.3    17.0    +      -       -      +
    906A  PRO*     3.3    23.6    -      -       +      +
    907A  GLU*     3.4     8.1    +      -       -      +
    908A  MET*     2.8    53.0    +      -       +      +
    909A  MET*     2.8    36.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 724 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    699A  ILE*     3.7    18.3    -      -       +      +
    700A  TYR*     3.0    34.9    +      -       -      +
    701A  ALA      3.9    11.5    +      -       -      -
    702A  GLY*     3.8    16.6    -      -       -      +
    720A  GLN*     2.9    41.2    +      -       -      +
    721A  LEU*     3.6     5.4    -      -       -      +
    723A  GLU*     1.3    76.5    -      -       +      +
    725A  GLN*     1.3    63.6    +      -       -      +
    727A  LEU*     3.4    10.2    +      -       -      +
    728A  SER*     3.2    19.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 725 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    201A  T98      3.1    29.6    +      -       -      -
    699A  ILE*     4.0    21.3    +      -       +      +
    721A  LEU*     2.9    39.7    +      -       +      +
    724A  ARG*     1.3    74.9    -      -       -      +
    726A  LEU*     1.3    59.5    +      -       -      +
    728A  SER*     3.0    10.1    +      -       -      +
    729A  VAL*     2.9    33.5    +      -       +      +
    759A  MET*     3.2    41.3    -      -       +      +
    766A  ARG*     3.4    17.5    +      -       -      +
    778A  PHE      4.0     1.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 726 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    722A  GLY      2.9    16.5    +      -       -      +
    723A  GLU      3.5     6.3    -      -       -      +
    724A  ARG      3.3     0.4    -      -       -      -
    725A  GLN*     1.3    75.9    -      -       -      +
    727A  LEU*     1.3    62.9    +      -       -      +
    729A  VAL*     3.2     8.7    +      -       +      +
    730A  VAL*     3.1    31.5    +      -       +      +
    751A  ILE*     4.2    22.9    -      -       +      -
    755A  TRP*     3.7    27.1    -      -       +      -
    759A  MET*     3.8     4.4    -      -       +      +
    908A  MET*     3.7    44.2    -      -       +      +
    909A  MET*     3.7    11.9    -      -       +      +
    912A  VAL*     3.9    17.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 727 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    723A  GLU      3.3     9.6    +      -       -      +
    724A  ARG*     3.6    12.1    -      -       -      +
    725A  GLN      3.3     0.2    -      -       -      -
    726A  LEU*     1.3    77.9    -      -       -      +
    728A  SER*     1.3    58.9    +      -       -      +
    730A  VAL*     3.4     9.0    +      -       +      +
    731A  LYS*     2.9    62.7    +      -       +      +
    908A  MET*     4.4    21.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 728 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    696A  PRO*     4.0    22.2    -      -       -      +
    699A  ILE*     3.5    31.0    -      -       -      +
    724A  ARG      3.2     6.3    +      -       -      -
    725A  GLN*     3.0    12.3    +      -       -      +
    727A  LEU*     1.3    77.4    -      -       -      +
    729A  VAL*     1.3    62.3    +      -       -      +
    731A  LYS*     3.8     7.4    -      -       -      +
    732A  TRP*     2.8    32.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 729 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    696A  PRO*     6.1     0.2    -      -       -      -
    725A  GLN*     2.9    21.4    +      -       +      +
    726A  LEU*     3.2    12.3    +      -       +      +
    728A  SER*     1.3    76.7    +      -       -      +
    730A  VAL*     1.3    61.0    +      -       -      +
    732A  TRP*     3.4    15.8    +      -       +      +
    733A  SER*     2.9    28.6    +      -       -      -
    751A  ILE*     4.0    30.1    -      -       +      +
    755A  TRP*     5.7     4.9    -      -       -      +
    758A  LEU*     3.8    38.8    -      -       +      -
    759A  MET*     5.6     7.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 730 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    726A  LEU*     3.1    21.2    +      -       +      +
    727A  LEU*     3.9    10.8    -      -       +      +
    729A  VAL*     1.3    73.9    -      -       -      +
    731A  LYS*     1.3    65.7    +      -       +      +
    733A  SER*     2.8    24.3    +      -       -      +
    734A  LYS*     3.2    29.6    -      -       +      +
    751A  ILE*     4.1    30.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 731 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    727A  LEU*     2.9    53.1    +      -       +      +
    728A  SER*     3.8     6.7    -      -       -      +
    730A  VAL*     1.3    76.2    -      -       +      +
    732A  TRP*     1.3    62.4    +      -       -      +
    734A  LYS*     3.1    25.7    +      -       +      +
    735A  SER*     3.7     8.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with TRP 732 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    691A  LEU*     5.1     3.6    +      -       +      +
    694A  ILE*     3.5    51.6    -      -       +      +
    695A  GLU*     4.2     8.1    +      -       -      -
    696A  PRO*     4.5    11.7    -      -       +      -
    728A  SER      2.8    21.6    +      -       -      +
    729A  VAL*     3.5    23.3    -      -       +      +
    731A  LYS*     1.3    72.4    -      -       -      +
    733A  SER*     1.3    70.4    +      -       -      +
    735A  SER*     3.1    17.4    +      -       -      -
    736A  LEU*     3.2    28.6    +      -       +      +
    758A  LEU*     4.1    18.4    -      -       +      -
    819A  LEU      5.6     0.2    -      -       -      -
    822A  LYS*     3.6    44.7    -      -       +      +
    823A  VAL*     4.1    22.0    -      -       +      -
    826A  LEU*     3.9    24.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 733 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    729A  VAL      2.9    15.7    +      -       -      -
    730A  VAL*     2.8    18.9    +      -       -      +
    732A  TRP*     1.3    87.4    -      -       -      +
    734A  LYS*     1.3    63.8    +      -       -      +
    736A  LEU*     3.3    17.8    +      -       -      +
    739A  PHE*     3.5    45.6    -      -       -      +
    740A  ARG      4.5     2.3    +      -       -      -
    747A  GLN*     5.4     1.4    +      -       -      -
    751A  ILE*     3.6    20.7    -      -       -      +
    826A  LEU*     5.1     1.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 734 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    730A  VAL*     3.2    29.4    -      -       +      +
    731A  LYS*     3.4    15.3    -      -       +      +
    732A  TRP      3.1     0.8    -      -       -      -
    733A  SER*     1.3    78.8    -      -       -      +
    735A  SER*     1.3    60.8    +      -       -      +
    736A  LEU      5.2     0.4    -      -       -      -
    740A  ARG*     4.4    24.7    -      -       -      +
    747A  GLN*     5.7     9.5    -      -       -      +
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Residues in contact with SER 735 (chain A). Click here for Legend to table.
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                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
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    203A  SO4      5.2     2.0    +      -       -      -
    690A  LEU*     3.9     7.1    -      -       -      +
    694A  ILE*     3.8    30.4    -      -       -      +
    731A  LYS      3.7     6.7    +      -       -      -
    732A  TRP*     3.1     9.2    +      -       -      -
    734A  LYS*     1.3    80.8    +      -       -      +
    736A  LEU*     1.3    60.5    +      -       -      +
    737A  PRO*     3.4    10.2    -      -       -      +
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Residues in contact with LEU 736 (chain A). Click here for Legend to table.
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                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
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    203A  SO4      4.4     1.6    +      -       -      -
    691A  LEU*     3.5    31.0    -      -       +      -
    694A  ILE*     3.9     6.1    -      -       +      -
    732A  TRP*     3.2    24.7    +      -       +      +
    733A  SER*     3.3    14.9    +      -       -      +
    735A  SER*     1.3    75.2    -      -       -      +
    737A  PRO*     1.4    70.5    -      -       -      +
    738A  GLY      3.2     0.5    +      -       -      -
    739A  PHE*     3.0    20.4    +      -       +      +
    740A  ARG*     4.3     3.5    +      -       -      +
    823A  VAL*     3.6    19.3    -      -       +      -
    826A  LEU*     3.2    34.3    -      -       +      -
    844A  MET*     3.9    17.5    -      -       +      -
    848A  TYR*     3.5    15.9    -      -       +      +
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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
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  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) +   -    +    +   +   +    +    -
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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