Contacts of the helix formed by residues 851 - 875 (chain B) in PDB entry 2XWU


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 VAL 851 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    801B  LEU*     5.9     0.7    -      -       +      -
    805B  PRO*     4.8    12.8    -      -       +      +
    806B  ASP*     5.9     0.4    -      -       -      -
    808B  PHE*     4.4    10.8    -      -       +      -
    809B  LEU*     3.8    30.3    -      -       +      -
    847B  ARG*     3.1    29.2    -      -       +      +
    849B  GLY*     4.4     4.0    +      -       -      -
    850B  GLU*     1.3    79.7    -      -       +      +
    852B  GLU*     1.3    66.3    +      -       -      +
    853B  SER*     3.9    11.9    -      -       -      +
    854B  VAL*     3.2    30.3    -      -       +      +
    855B  GLY*     3.2    14.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 852 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    809B  LEU*     4.6    11.4    -      -       +      +
    849B  GLY*     6.3     0.2    -      -       -      -
    850B  GLU      4.2     0.6    +      -       -      -
    851B  VAL*     1.3    73.3    -      -       -      +
    853B  SER*     1.3    64.0    +      -       -      +
    855B  GLY*     3.1     4.0    +      -       -      +
    856B  LYS*     3.0    23.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 853 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    808B  PHE      3.6    23.8    -      -       -      -
    809B  LEU*     4.6     6.8    -      -       -      +
    815B  VAL*     4.0    16.6    -      -       -      -
    851B  VAL*     3.3     7.4    -      -       -      +
    852B  GLU*     1.3    79.2    -      -       -      +
    854B  VAL*     1.3    62.5    +      -       -      +
    856B  LYS*     3.4     7.2    +      -       -      +
    857B  VAL*     3.2    30.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 854 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    801B  LEU*     4.6     5.2    -      -       +      -
    808B  PHE*     4.3    23.3    -      -       +      -
    815B  VAL*     4.9     4.5    -      -       +      -
    844B  LEU*     3.3    53.6    -      -       +      +
    847B  ARG      4.1     8.7    -      -       -      +
    848B  CYS*     4.3     1.5    -      -       -      +
    851B  VAL*     3.2    33.7    +      -       +      -
    852B  GLU      3.3     0.6    -      -       -      -
    853B  SER*     1.3    74.1    -      -       -      +
    855B  GLY*     1.3    61.3    +      -       -      +
    857B  VAL*     4.0     4.8    -      -       -      +
    858B  VAL*     3.0    29.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 855 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    847B  ARG      5.0     0.2    +      -       -      -
    848B  CYS*     4.7    11.4    -      -       -      -
    849B  GLY*     4.8     8.5    -      -       -      -
    851B  VAL      3.2     9.7    +      -       -      -
    852B  GLU*     3.1     7.4    +      -       -      -
    854B  VAL*     1.3    77.1    -      -       -      +
    856B  LYS*     1.3    64.6    +      -       -      +
    858B  VAL*     3.5     2.4    +      -       -      +
    859B  GLN*     3.0    25.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 856 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    852B  GLU      3.0    12.1    +      -       -      +
    853B  SER*     3.7     9.2    -      -       -      +
    855B  GLY*     1.3    76.1    -      -       -      +
    857B  VAL*     1.3    60.4    +      -       +      +
    859B  GLN*     3.3     4.5    +      -       -      +
    860B  GLU*     2.8    51.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 857 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    815B  VAL*     3.3    32.1    -      -       +      +
    816B  LYS*     4.3     7.9    -      -       +      +
    819B  PHE*     3.5    45.0    -      -       +      -
    844B  LEU*     6.4     0.2    -      -       +      -
    853B  SER      3.2    17.8    +      -       -      +
    854B  VAL*     4.3     3.8    -      -       -      +
    855B  GLY      3.3     0.2    -      -       -      -
    856B  LYS*     1.3    76.2    -      -       +      +
    858B  VAL*     1.3    60.4    +      -       +      +
    860B  GLU*     4.4     7.0    -      -       -      +
    861B  ASP*     2.8    38.5    +      -       -      +
    862B  GLY      3.6     2.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 858 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    819B  PHE*     4.7     6.3    -      -       +      -
    844B  LEU*     4.4    12.1    -      -       +      -
    845B  LEU*     3.9    17.5    -      -       +      -
    848B  CYS*     3.7    18.2    -      -       -      -
    854B  VAL*     3.0    27.5    +      -       +      +
    855B  GLY      4.0     3.1    -      -       -      +
    857B  VAL*     1.3    77.6    -      -       +      +
    859B  GLN*     1.3    57.5    +      -       -      +
    862B  GLY*     2.9    25.7    +      -       -      +
    865B  LEU*     6.2     0.7    -      -       +      -
    892B  LEU*     4.9     1.6    -      -       +      -
    896B  CYS*     4.0    24.9    -      -       -      -
    899B  LEU*     4.6     5.2    -      -       +      -
    903B  TRP*     2.9    29.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 859 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    855B  GLY      3.0    18.7    +      -       -      +
    856B  LYS*     3.7     5.2    -      -       -      +
    858B  VAL*     1.3    81.5    -      -       -      +
    860B  GLU*     1.3    63.9    +      -       +      +
    899B  LEU*     4.1    21.6    -      -       +      +
    903B  TRP*     3.8    12.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 860 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    816B  LYS*     3.9    19.0    +      -       -      +
    856B  LYS*     2.8    38.9    +      -       -      +
    857B  VAL*     4.0     3.8    -      -       -      +
    859B  GLN*     1.3    77.3    -      -       +      +
    861B  ASP*     1.3    74.1    +      -       -      +
    863B  ARG*     5.2     2.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 861 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    816B  LYS*     3.0    42.3    +      -       -      +
    819B  PHE*     3.5    24.3    -      -       +      -
    820B  GLN*     5.7     4.3    -      -       -      +
    857B  VAL*     2.8    22.1    +      -       -      +
    860B  GLU*     1.3    82.9    -      -       -      +
    862B  GLY*     1.3    64.7    +      -       -      +
    863B  ARG*     3.2     3.6    -      -       -      -
    864B  MET*     3.0    41.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 862 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    819B  PHE*     4.1    13.0    -      -       -      -
    857B  VAL      3.6     2.0    +      -       -      -
    858B  VAL*     2.9    26.6    +      -       -      -
    860B  GLU      3.7     1.2    -      -       -      -
    861B  ASP*     1.3    77.7    -      -       -      +
    863B  ARG*     1.3    62.5    +      -       -      +
    865B  LEU*     3.0    15.8    +      -       -      +
    866B  LEU*     3.0    10.6    +      -       -      +
    892B  LEU*     6.0     0.2    -      -       -      +
    903B  TRP*     3.3    19.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 863 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    860B  GLU      5.2     1.7    +      -       -      +
    861B  ASP*     3.2     2.3    +      -       -      -
    862B  GLY*     1.3    74.7    -      -       -      +
    864B  MET*     1.3    58.0    +      -       -      +
    866B  LEU*     3.2     5.1    +      -       -      +
    867B  ILE*     2.9    43.7    +      -       +      +
    903B  TRP*     3.6    38.0    -      -       +      +
    906B  GLU*     6.1     0.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with MET 864 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    819B  PHE*     5.1     1.6    -      -       +      -
    820B  GLN*     3.8    29.8    -      -       -      +
    823B  VAL*     3.9    20.4    -      -       +      +
    861B  ASP*     3.0    31.1    +      -       +      +
    863B  ARG*     1.3    81.8    -      -       -      +
    865B  LEU*     1.3    58.2    +      -       -      +
    867B  ILE*     3.6    10.6    +      -       -      +
    868B  ALA*     3.2    22.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 865 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    819B  PHE*     3.7    23.7    -      -       +      -
    823B  VAL*     4.2     9.2    -      -       +      +
    826B  LEU*     3.9    12.1    -      -       +      -
    841B  PHE*     3.5    55.4    -      -       +      -
    845B  LEU*     4.9     6.5    -      -       +      -
    858B  VAL*     6.2     0.4    -      -       +      -
    861B  ASP      3.6     1.0    +      -       -      -
    862B  GLY*     3.0    10.6    +      -       -      +
    864B  MET*     1.3    77.5    -      -       -      +
    866B  LEU*     1.3    66.5    -      -       -      +
    868B  ALA*     3.1     5.5    +      -       -      +
    869B  VAL*     3.0    31.0    +      -       +      +
    888B  ILE*     4.2    19.5    -      -       +      -
    892B  LEU*     4.5    19.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 866 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    862B  GLY      3.0     8.8    +      -       -      +
    863B  ARG*     3.6     9.4    -      -       -      +
    865B  LEU*     1.3    80.8    -      -       -      +
    867B  ILE*     1.3    58.8    +      -       +      +
    869B  VAL*     3.1     7.5    +      -       +      +
    870B  LEU*     2.9    38.9    +      -       +      +
    889B  LEU*     3.8    27.8    -      -       +      -
    892B  LEU*     4.1    11.2    -      -       +      +
    900B  LEU*     3.9    18.2    -      -       +      -
    903B  TRP*     3.7    34.8    -      -       +      +
    904B  ILE*     3.8    20.0    -      -       +      +
    907B  ALA*     4.3    12.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 867 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    863B  ARG*     2.9    31.7    +      -       +      +
    864B  MET*     3.8     9.6    -      -       -      +
    866B  LEU*     1.3    77.2    -      -       +      +
    868B  ALA*     1.3    57.3    +      -       -      +
    870B  LEU*     3.3     8.1    +      -       -      +
    871B  GLU*     2.9    46.8    +      -       -      +
    907B  ALA*     4.6    19.3    -      -       +      -
    913B  PHE*     3.8    19.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 868 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    823B  VAL*     3.9    25.6    -      -       +      +
    826B  LEU*     4.6    11.5    -      -       +      +
    827B  LYS*     6.4     2.7    -      -       +      -
    864B  MET      3.2    11.2    +      -       -      +
    865B  LEU*     3.1     9.5    +      -       -      +
    867B  ILE*     1.3    78.9    -      -       -      +
    869B  VAL*     1.3    57.2    +      -       -      +
    871B  GLU*     3.2    17.1    +      -       -      +
    872B  ALA*     3.1    26.9    +      -       -      +
    885B  PHE*     4.9     2.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 869 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    826B  LEU*     4.6     2.9    -      -       +      -
    865B  LEU*     3.0    20.5    +      -       +      +
    866B  LEU*     3.4    12.3    -      -       +      +
    868B  ALA*     1.3    74.3    -      -       -      +
    870B  LEU*     1.3    65.2    +      -       +      +
    872B  ALA*     3.3     3.1    +      -       -      +
    873B  ILE*     3.1    31.3    +      -       +      +
    885B  PHE*     4.0    24.9    -      -       +      +
    888B  ILE*     4.0    35.0    -      -       +      -
    889B  LEU*     4.0    32.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 870 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    866B  LEU*     2.9    34.8    +      -       +      +
    867B  ILE*     3.3     4.7    +      -       -      +
    869B  VAL*     1.3    76.1    -      -       +      +
    871B  GLU*     1.3    60.6    +      -       -      +
    873B  ILE*     3.7    10.9    -      -       +      +
    874B  GLY      2.7    24.9    +      -       -      -
    889B  LEU*     5.5     4.3    -      -       +      -
    904B  ILE*     5.4     2.5    -      -       +      +
    907B  ALA*     3.9    27.6    -      -       +      -
    908B  LEU*     4.2    21.8    -      -       +      -
    913B  PHE*     4.3     9.4    -      -       +      -
    914B  PRO*     3.3    27.3    -      -       +      +
    926B  PHE*     4.2    26.0    -      -       +      -
    930B  ILE*     5.8     0.2    -      -       +      -
    947B  PHE*     5.0     2.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 871 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    867B  ILE*     2.9    33.5    +      -       -      +
    868B  ALA*     3.5    17.2    -      -       -      +
    869B  VAL      3.2     0.2    -      -       -      -
    870B  LEU*     1.3    76.8    -      -       -      +
    872B  ALA*     1.3    60.3    +      -       -      +
    874B  GLY*     3.5     2.6    +      -       -      +
    875B  GLY      3.3     5.9    +      -       -      -
    876B  GLN*     3.0    61.6    +      -       -      +
    913B  PHE*     3.7    26.1    -      -       +      -
    914B  PRO*     5.0     2.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 872 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    826B  LEU      5.6     0.9    -      -       -      +
    868B  ALA      3.1    10.0    +      -       -      +
    869B  VAL      3.5     8.1    -      -       -      +
    871B  GLU*     1.3    78.5    -      -       -      +
    873B  ILE*     1.3    61.5    +      -       -      +
    875B  GLY      3.1     9.4    +      -       -      -
    876B  GLN*     4.3     2.0    -      -       -      -
    877B  ALA*     3.3    30.6    +      -       +      +
    882B  MET*     4.3     2.3    -      -       -      +
    885B  PHE*     3.4    40.8    -      -       +      -
    952B  ARG*     3.4     8.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 873 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    869B  VAL*     3.1    25.6    +      -       +      +
    870B  LEU*     4.0     9.0    -      -       +      +
    872B  ALA*     1.3    71.0    -      -       -      +
    874B  GLY*     1.3    66.2    +      -       -      +
    875B  GLY*     3.0     2.3    +      -       -      -
    882B  MET*     3.1    25.4    -      -       +      -
    885B  PHE*     4.3    12.8    -      -       +      +
    889B  LEU*     3.9    25.8    -      -       +      -
    926B  PHE*     4.8     4.3    -      -       +      -
    944B  VAL*     3.6    24.2    -      -       +      -
    947B  PHE*     3.5    31.0    -      -       +      -
    948B  THR*     2.7    31.3    +      -       -      +
    951B  CYS*     4.0     1.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 874 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    870B  LEU      2.7    21.7    +      -       -      -
    871B  GLU      3.5     3.8    +      -       -      -
    872B  ALA      3.2     0.4    -      -       -      -
    873B  ILE*     1.3    73.1    -      -       -      +
    875B  GLY*     1.3    56.0    +      -       -      +
    914B  PRO*     3.8    18.9    -      -       -      +
    915B  SER*     4.3     4.5    +      -       -      -
    947B  PHE*     5.3     0.2    -      -       -      -
    951B  CYS*     3.1    39.7    -      -       -      +
    952B  ARG*     4.3     1.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 875 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    871B  GLU      3.3     0.2    +      -       -      -
    872B  ALA      3.1     0.4    +      -       -      -
    873B  ILE      3.0     4.0    -      -       -      -
    874B  GLY*     1.3    82.7    -      -       -      +
    876B  GLN*     1.3    60.1    +      -       -      +
    877B  ALA      3.1    11.2    +      -       -      +
    952B  ARG*     3.2    36.3    +      -       -      -
----------------------------------------------------------
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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