Contacts of the helix formed by residues 844 - 865 (chain S) in PDB entry 1NVU


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 844 (chain S).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    842S  THR*     3.4     1.3    -      -       -      +
    843S  GLU*     1.3    76.8    -      -       -      +
    845S  LEU*     1.3    64.8    +      -       -      +
    846S  GLU*     3.2    14.9    +      -       -      +
    847S  GLU*     3.0    42.9    +      -       -      +
    848S  ARG*     2.9    23.5    +      -       -      +
   1027S  PHE*     2.8    30.0    +      -       -      +
   1028S  PRO      3.6    17.7    +      -       -      +
   1029S  LYS*     4.0    20.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 845 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    843S  GLU      3.2     4.4    +      -       -      -
    844S  ASN*     1.3    72.2    -      -       -      +
    846S  GLU*     1.3    60.1    +      -       -      +
    848S  ARG*     3.0    29.9    +      -       -      +
    849S  VAL*     2.9    35.8    +      -       +      +
    888S  HIS*     3.7    26.9    -      -       +      +
    889S  THR*     3.8    13.0    -      -       -      +
    892S  GLN*     3.4    27.8    -      -       -      +
   1017S  GLU*     4.1     0.7    -      -       -      +
   1024S  LEU*     4.4    21.8    -      -       +      -
   1027S  PHE*     5.6     1.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 846 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    844S  ASN*     3.2    11.2    +      -       -      +
    845S  LEU*     1.3    80.3    -      -       -      +
    847S  GLU*     1.3    64.1    +      -       +      +
    849S  VAL*     3.4     8.7    +      -       -      +
    850S  ALA*     3.2    19.6    +      -       -      +
    892S  GLN*     5.0     7.4    -      -       -      +
   1029S  LYS*     5.4    10.3    -      -       -      +
   1035S  LEU*     5.0     4.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 847 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    777S  LEU*     5.4     0.2    -      -       -      +
    842S  THR*     3.4    14.3    -      -       +      +
    844S  ASN*     3.0    24.9    +      -       -      +
    846S  GLU*     1.3    77.4    -      -       +      +
    848S  ARG*     1.3    57.1    +      -       -      +
    850S  ALA*     3.1     4.7    +      -       -      +
    851S  VAL*     2.9    29.5    +      -       -      +
   1028S  PRO      4.3     0.2    -      -       -      +
   1029S  LYS*     2.8    35.1    +      -       +      +
   1030S  LYS*     2.8    33.0    +      -       -      +
   1031S  TYR*     2.8    38.2    +      -       +      +
   1035S  LEU*     3.6    20.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 848 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    839S  ILE*     3.3    44.2    -      -       +      +
    842S  THR*     2.9    23.6    +      -       -      +
    843S  GLU*     2.8    30.3    +      -       -      +
    844S  ASN      2.9     9.1    +      -       -      +
    845S  LEU*     3.4    24.1    -      -       -      +
    847S  GLU*     1.3    73.8    -      -       -      +
    849S  VAL*     1.3    61.9    +      -       -      +
    851S  VAL*     3.0     3.6    +      -       -      +
    852S  VAL*     2.8    29.5    +      -       -      +
    886S  LEU*     4.1     2.8    -      -       -      +
    889S  THR*     2.9    22.4    +      -       +      -
   1016S  ILE*     3.7    28.1    +      -       -      +
   1017S  GLU*     2.9    34.6    +      -       -      +
   1024S  LEU*     5.4     1.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 849 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    845S  LEU*     2.9    26.4    +      -       +      +
    846S  GLU*     3.5     9.6    -      -       -      +
    847S  GLU      3.3     0.2    -      -       -      -
    848S  ARG*     1.3    75.3    -      -       -      +
    850S  ALA*     1.3    62.7    +      -       -      +
    852S  VAL      3.4     0.2    +      -       -      -
    853S  SER*     2.9    31.8    +      -       -      +
    889S  THR*     3.8    29.8    -      -       +      +
    892S  GLN*     3.8    43.5    -      -       +      +
    893S  ILE*     3.8    12.8    -      -       +      +
    894S  PRO*     5.6     0.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 850 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    777S  LEU*     4.2     6.2    -      -       +      +
    846S  GLU      3.2    12.8    +      -       -      +
    847S  GLU      3.1    10.6    +      -       -      +
    849S  VAL*     1.3    78.4    -      -       -      +
    851S  VAL*     1.3    61.1    +      -       +      +
    853S  SER*     3.9     6.5    -      -       -      -
    854S  ARG*     3.0    26.3    +      -       -      +
   1035S  LEU*     4.1    36.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 851 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    776S  LEU*     3.8    19.9    -      -       +      +
    777S  LEU*     4.0    24.9    -      -       +      -
    838S  CYS*     3.9    13.0    -      -       +      +
    839S  ILE*     3.9    24.9    -      -       +      -
    842S  THR*     3.6    19.7    -      -       -      +
    847S  GLU      2.9    17.2    +      -       -      +
    848S  ARG*     3.0     9.4    +      -       -      +
    850S  ALA*     1.3    74.9    -      -       -      +
    852S  VAL*     1.3    66.3    +      -       -      +
    854S  ARG*     3.2     3.6    +      -       -      +
    855S  ILE*     3.1    23.7    +      -       +      +
   1031S  TYR*     3.8    12.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 852 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    839S  ILE*     3.9    31.9    -      -       +      -
    848S  ARG      2.8    21.0    +      -       -      +
    849S  VAL      3.8     3.8    -      -       -      +
    851S  VAL*     1.3    73.1    -      -       -      +
    853S  SER*     1.3    63.0    +      -       -      +
    855S  ILE*     3.2     9.4    +      -       -      +
    856S  ILE*     3.0    29.0    +      -       +      +
    878S  MET*     4.2     7.4    -      -       +      -
    889S  THR*     3.8    17.5    -      -       +      -
    890S  PHE*     3.9    29.6    -      -       +      -
    893S  ILE*     3.6    19.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 853 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    849S  VAL*     2.9    23.4    +      -       -      +
    850S  ALA*     3.9     7.0    -      -       -      -
    851S  VAL      3.3     0.2    -      -       -      -
    852S  VAL*     1.3    74.0    -      -       -      +
    854S  ARG*     1.3    65.6    +      -       -      +
    856S  ILE*     3.2     2.5    +      -       -      -
    857S  GLU*     3.0    22.7    +      -       -      +
    893S  ILE*     3.2    13.5    -      -       -      +
    894S  PRO*     4.2     5.9    -      -       -      +
    897S  GLN*     3.0    37.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 854 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    764S  HIS*     4.1    11.7    +      -       -      -
    776S  LEU*     4.2    15.3    -      -       +      +
    777S  LEU*     3.0    58.8    +      -       +      +
    779S  LEU      4.3     5.1    +      -       -      -
    781S  PRO*     4.0    18.3    -      -       +      +
    850S  ALA      3.0    18.9    +      -       -      +
    851S  VAL      3.2     4.7    +      -       -      +
    853S  SER*     1.3    76.0    -      -       -      +
    855S  ILE*     1.3    57.9    +      -       -      +
    857S  GLU*     3.1    22.3    +      -       -      +
    858S  ILE*     3.0    34.3    +      -       +      +
   1034S  PRO      4.9     1.0    +      -       -      -
   1035S  LEU*     2.9    35.0    +      -       -      +
   1036S  LYS      3.8     2.6    +      -       -      -
   1037S  SER*     3.4    24.9    -      -       -      +
   1038S  PRO*     4.2     3.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 855 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    776S  LEU*     3.9    17.7    -      -       +      -
    835S  PHE*     3.9    42.0    -      -       +      +
    839S  ILE*     3.7    34.8    -      -       +      -
    851S  VAL*     3.1    23.3    +      -       +      +
    852S  VAL      3.2     6.5    +      -       -      +
    854S  ARG*     1.3    76.3    -      -       -      +
    856S  ILE*     1.3    62.5    +      -       -      +
    858S  ILE*     3.2     9.7    +      -       -      +
    859S  LEU*     3.1    19.9    +      -       -      +
    874S  VAL*     3.8    18.1    -      -       +      +
    878S  MET*     3.5    18.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 856 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    852S  VAL*     3.0    31.3    +      -       +      +
    853S  SER*     3.2     7.8    +      -       -      +
    855S  ILE*     1.3    75.3    -      -       -      +
    857S  GLU*     1.3    60.5    +      -       -      +
    859S  LEU*     3.3     9.6    +      -       +      +
    860S  GLN*     3.0    25.0    +      -       -      +
    874S  VAL*     5.1     1.6    -      -       +      -
    878S  MET*     4.3    11.4    -      -       +      -
    890S  PHE*     5.0     0.9    -      -       +      -
    893S  ILE*     4.1    22.0    -      -       +      -
    897S  GLN*     3.8    39.3    -      -       +      +
    898S  LYS*     5.6     0.2    -      -       -      -
    900S  ILE*     3.9    18.4    -      -       +      -
    901S  LEU*     4.3    27.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 857 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    781S  PRO*     4.3     6.8    -      -       +      +
    853S  SER*     3.0    19.7    +      -       -      +
    854S  ARG*     3.1    18.4    +      -       -      +
    856S  ILE*     1.3    75.0    -      -       -      +
    858S  ILE*     1.3    63.8    +      -       -      +
    860S  GLN*     3.1    14.5    +      -       -      +
    861S  VAL*     3.1    25.3    +      -       -      +
    897S  GLN*     3.4    15.4    +      -       -      +
   1037S  SER*     2.5    38.1    +      -       -      -
   1039S  GLY*     4.2     9.5    -      -       -      -
   1040S  VAL*     3.5    25.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 858 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    776S  LEU*     3.8    27.8    -      -       +      -
    781S  PRO*     3.9    27.4    -      -       +      +
    784S  ILE*     3.6    31.4    -      -       +      -
    785S  ALA*     3.9     9.8    -      -       +      +
    835S  PHE*     4.6    13.2    -      -       +      -
    854S  ARG*     3.0    19.7    +      -       +      +
    855S  ILE*     3.5    11.2    -      -       -      +
    856S  ILE      3.2     0.2    -      -       -      -
    857S  GLU*     1.3    76.7    -      -       -      +
    859S  LEU*     1.3    62.6    +      -       -      +
    861S  VAL*     3.1     5.6    +      -       -      +
    862S  PHE*     2.9    48.7    +      -       +      -
    874S  VAL*     5.1     0.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 859 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    855S  ILE      3.1    12.5    +      -       -      +
    856S  ILE*     3.4    10.3    -      -       -      +
    857S  GLU      3.2     0.2    -      -       -      -
    858S  ILE*     1.3    76.5    -      -       -      +
    860S  GLN*     1.3    60.6    +      -       -      +
    862S  PHE*     3.0    14.9    +      -       -      +
    863S  GLN*     2.9    40.4    +      -       +      +
    871S  VAL*     4.3    16.2    -      -       +      +
    874S  VAL*     3.6    32.7    -      -       +      +
    875S  VAL*     4.3     0.4    -      -       +      -
    900S  ILE*     3.5    26.9    -      -       +      -
    901S  LEU*     4.2    15.9    -      -       +      -
    904S  ALA*     3.8    26.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 860 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    856S  ILE      3.0    11.8    +      -       -      +
    857S  GLU*     3.1    22.4    +      -       -      +
    859S  LEU*     1.3    83.5    -      -       -      +
    861S  VAL*     1.3    60.2    +      -       -      +
    863S  GLN*     3.4     6.8    +      -       -      +
    864S  GLU*     3.2    34.1    +      -       +      +
    897S  GLN*     5.4     3.2    -      -       -      +
    900S  ILE*     3.7    33.0    -      -       +      +
   1040S  VAL*     3.8    27.9    -      -       +      +
   1041S  ARG*     5.0     5.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 861 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    781S  PRO      4.6     1.3    -      -       -      +
    782S  ILE*     4.2    32.5    -      -       +      +
    785S  ALA*     3.4    26.2    -      -       +      -
    786S  ARG*     5.1     1.3    -      -       +      -
    857S  GLU      3.1    13.8    +      -       -      +
    858S  ILE      3.1     3.6    +      -       -      +
    860S  GLN*     1.3    73.2    -      -       -      +
    862S  PHE*     1.3    66.9    +      -       -      +
    864S  GLU*     3.1    17.8    +      -       -      +
    865S  LEU*     2.9    33.9    +      -       +      +
   1040S  VAL*     3.8    27.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 862 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    785S  ALA*     3.5    30.7    -      -       +      -
    788S  LEU*     4.0    26.2    -      -       +      -
    789S  THR*     3.6    11.9    -      -       -      -
    835S  PHE*     4.9     4.0    -      +       -      -
    858S  ILE*     2.9    32.5    +      -       +      -
    859S  LEU*     3.0    16.1    +      -       -      +
    861S  VAL*     1.3    76.5    -      -       -      +
    863S  GLN*     1.3    60.3    +      -       -      +
    865S  LEU*     3.2     3.6    +      -       -      +
    866S  ASN      3.0     3.5    +      -       -      -
    867S  ASN*     2.9    48.2    +      -       -      +
    870S  GLY*     3.3    35.7    -      -       -      -
    871S  VAL*     3.8    13.5    -      -       +      -
    873S  GLU*     4.3     7.2    -      -       -      -
    874S  VAL*     4.2     8.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 863 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    859S  LEU*     2.9    28.5    +      -       +      +
    860S  GLN*     3.6     9.2    -      -       -      +
    861S  VAL      3.2     0.2    -      -       -      -
    862S  PHE*     1.3    73.3    -      -       -      +
    864S  GLU*     1.3    67.5    +      -       +      +
    866S  ASN*     3.1    20.7    +      -       -      +
    868S  PHE*     4.6     5.5    -      -       -      -
    871S  VAL*     3.5    21.8    -      -       +      +
    900S  ILE*     4.9     3.2    +      -       -      +
    903S  GLU*     5.1     4.2    -      -       -      +
    904S  ALA*     4.1    27.9    -      -       -      +
    907S  LEU*     4.2    10.7    -      -       -      +
    918S  LYS*     2.6    37.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 864 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    860S  GLN*     3.2    29.1    +      -       +      +
    861S  VAL*     3.1    21.4    +      -       -      +
    863S  GLN*     1.3    78.0    -      -       +      +
    865S  LEU*     1.3    63.4    +      -       +      +
    866S  ASN*     3.2     8.2    +      -       -      +
   1040S  VAL*     4.6     8.9    -      -       -      +
   1041S  ARG*     3.2    35.1    +      -       -      -
   1042S  PRO*     5.6     1.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 865 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    785S  ALA*     4.0     8.5    -      -       +      +
    786S  ARG*     4.0    15.9    -      -       +      -
    789S  THR*     3.4    32.5    -      -       +      +
    861S  VAL*     2.9    32.8    +      -       +      +
    862S  PHE*     3.7     4.5    -      -       -      +
    863S  GLN      3.1     0.4    -      -       -      -
    864S  GLU*     1.3    79.0    -      -       +      +
    866S  ASN*     1.3    62.5    +      -       -      +
    867S  ASN      3.1     1.1    -      -       -      +
    925S  PRO      3.7     1.7    -      -       -      +
    979S  TYR*     2.7    44.5    +      -       +      -
    981S  LEU*     4.2    24.2    -      -       +      -
----------------------------------------------------------
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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