Contacts of the helix formed by residues 108 - 129 (chain H) in PDB entry 4HHM


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 ASP 108 (chain H).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    334G  ARG*     2.8    52.6    +      -       -      +
    337G  GLN*     3.8     8.4    +      -       -      +
    365G  ALA      5.5     0.7    -      -       -      +
    368G  ARG*     3.8    23.0    +      -       -      -
    370G  MET*     3.7    10.4    -      -       -      +
    106H  ALA*     3.2     2.0    -      -       +      +
    107H  ASN*     1.3    75.1    -      -       -      +
    109H  ARG*     1.3    65.6    +      -       -      +
    110H  ASP*     3.3    17.9    -      -       -      +
    111H  VAL*     3.3    23.2    +      -       +      +
    112H  ARG*     3.3    15.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 109 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    337G  GLN*     3.0    23.2    -      -       +      +
    340G  GLU*     4.4    16.1    -      -       -      +
    341G  PRO      3.1    22.4    +      -       -      -
    342G  THR*     3.4    14.1    +      -       -      +
    343G  ALA*     4.8     0.4    -      -       -      +
    344G  ALA*     4.8     4.8    -      -       -      +
    345G  ASP*     4.2     8.9    +      -       -      +
    107H  ASN      3.3     2.0    +      -       -      -
    108H  ASP*     1.3    69.8    -      -       -      +
    110H  ASP*     1.3    66.5    +      -       -      +
    112H  ARG*     3.1    30.0    +      -       -      +
    113H  ARG*     3.1    58.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 110 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    337G  GLN*     4.7     1.7    -      -       -      +
    355G  THR      5.6     1.6    -      -       -      +
    356G  ALA*     5.5     1.4    -      -       -      -
    360G  PHE*     3.6    26.5    -      -       +      -
    368G  ARG*     3.2    31.0    +      -       -      -
    108H  ASP*     3.4     9.1    -      -       -      +
    109H  ARG*     1.3    78.7    -      -       -      +
    111H  VAL*     1.3    93.4    +      -       -      +
    113H  ARG*     3.4    11.0    +      -       -      +
    114H  TYR*     3.1    23.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 111 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    360G  PHE*     4.3     7.6    -      -       +      -
    365G  ALA*     4.7     1.6    -      -       +      +
    368G  ARG*     4.6     5.4    -      -       -      +
     98H  VAL*     3.4    38.4    -      -       +      +
     99H  PHE*     3.9    14.4    -      -       +      -
    102H  GLY      3.9     7.4    -      -       -      +
    103H  ALA      4.1     0.9    -      -       -      +
    106H  ALA*     3.8    19.1    -      -       +      -
    108H  ASP*     3.3    23.8    +      -       +      +
    109H  ARG      3.2     0.6    -      -       -      -
    110H  ASP*     1.3    91.5    +      -       -      +
    112H  ARG*     1.3    66.8    -      -       -      +
    114H  TYR*     3.3     3.3    +      -       +      +
    115H  ALA*     3.0    22.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 112 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    337G  GLN      3.0    14.8    +      -       -      -
    338G  LEU*     3.6     6.1    -      -       -      +
    340G  GLU      2.9    25.7    +      -       -      -
    341G  PRO      3.9     0.6    +      -       -      -
    342G  THR*     2.6    32.0    +      -       +      +
    103H  ALA      3.2    18.4    -      -       -      +
    104H  PHE*     3.2    22.8    -      -       -      +
    106H  ALA      2.9    36.8    +      -       -      +
    107H  ASN      2.9    20.6    +      -       -      -
    108H  ASP      3.4     2.9    -      -       -      +
    109H  ARG*     3.1    34.6    +      -       -      +
    111H  VAL*     1.3    77.2    -      -       -      +
    113H  ARG*     1.3    61.0    +      -       -      +
    115H  ALA*     3.5     3.6    +      -       -      +
    116H  LEU*     3.4    25.5    +      -       -      +
    157H  ARG*     3.4    16.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 113 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    342G  THR*     2.8    47.2    +      -       +      +
    343G  ALA*     3.4     8.1    -      -       -      +
    345G  ASP*     2.9    39.5    +      -       -      -
    350G  LEU*     3.6    29.7    -      -       +      +
    353G  ASP*     2.9    33.3    +      -       -      +
    355G  THR*     5.3     0.8    +      -       -      -
    356G  ALA*     4.1    11.2    -      -       +      +
    109H  ARG*     3.1    47.7    +      -       -      +
    110H  ASP*     3.8     9.0    -      -       -      +
    111H  VAL      3.2     0.2    -      -       -      -
    112H  ARG*     1.3    74.2    -      -       -      +
    114H  TYR*     1.3    64.8    +      -       -      +
    116H  LEU*     3.2     6.5    +      -       -      +
    117H  ARG*     3.1    26.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 114 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    356G  ALA*     3.3    21.2    +      -       -      +
    357G  TYR*     4.1    27.4    -      +       -      -
    360G  PHE*     3.4    34.5    -      +       +      -
    362G  VAL*     3.7    19.7    -      -       +      +
     61H  PHE*     3.0    34.7    -      +       -      -
     98H  VAL*     4.3     6.7    -      -       +      -
     99H  PHE*     3.5    35.7    -      +       -      -
    110H  ASP      3.1    16.9    +      -       -      +
    111H  VAL      3.7     3.6    -      -       -      +
    113H  ARG*     1.3    76.2    -      -       -      +
    115H  ALA*     1.3    56.7    +      -       -      +
    117H  ARG*     3.3     0.9    +      -       -      +
    118H  LYS*     2.9    41.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 115 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     93H  LEU*     4.1    12.9    -      -       +      +
     99H  PHE*     4.2     6.1    -      -       +      -
    103H  ALA*     3.7    32.1    -      -       +      -
    104H  PHE*     3.8    14.4    -      -       +      -
    111H  VAL      3.0    16.3    +      -       -      +
    112H  ARG      3.6     6.7    -      -       -      +
    113H  ARG      3.2     0.2    -      -       -      -
    114H  TYR*     1.3    76.4    -      -       -      +
    116H  LEU*     1.3    54.5    +      -       -      +
    118H  LYS*     3.4     2.8    +      -       -      +
    119H  THR*     2.8    37.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 116 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    342G  THR*     3.9    24.2    -      -       +      -
    350G  LEU*     4.0    17.9    -      -       +      -
    104H  PHE*     3.5    23.3    -      -       +      -
    112H  ARG      3.4     6.4    +      -       -      +
    113H  ARG*     3.2     7.1    +      -       -      +
    115H  ALA*     1.3    77.9    -      -       -      +
    117H  ARG*     1.3    60.3    +      -       -      +
    119H  THR*     3.2     3.1    +      -       -      -
    120H  ILE*     2.9    39.2    +      -       +      +
    161H  ALA*     3.6    32.1    -      -       +      +
    164H  LEU*     3.7    30.3    -      -       +      -
    165H  LEU*     3.8    16.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 117 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    350G  LEU*     3.0    36.1    +      -       +      -
    351G  LEU*     3.3    38.0    +      -       -      +
    353G  ASP      2.9    28.9    +      -       -      -
    356G  ALA*     3.5    25.1    -      -       +      +
    357G  TYR*     3.6    41.3    -      -       +      +
    358G  GLU*     4.1     9.1    +      -       -      -
    113H  ARG      3.1    18.3    +      -       -      +
    114H  TYR      3.7     2.7    -      -       -      +
    116H  LEU*     1.3    76.8    -      -       -      +
    118H  LYS*     1.3    61.2    +      -       -      +
    120H  ILE*     3.3     6.9    +      -       -      +
    121H  ARG*     3.1    23.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 118 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    357G  TYR*     4.3    12.7    -      -       +      -
     55H  ASP*     2.8    30.8    +      -       -      +
     56H  ASP*     2.9    27.6    +      -       -      -
     61H  PHE*     3.7    29.6    -      -       -      -
     91H  THR*     4.1     4.0    -      -       +      +
     92H  ASN      3.0    23.2    +      -       -      +
     93H  LEU*     3.9    11.0    -      -       +      -
     96H  HIS*     6.1     0.4    -      -       -      -
     99H  PHE*     4.0    13.2    -      -       +      -
    114H  TYR*     2.9    33.8    +      -       +      +
    115H  ALA*     3.7     5.6    -      -       -      +
    116H  LEU      3.3     0.2    -      -       -      -
    117H  ARG*     1.3    76.1    -      -       -      +
    119H  THR*     1.3    60.8    +      -       -      +
    121H  ARG*     3.7     5.3    +      -       -      +
    122H  ASN*     3.5    19.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 119 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91H  THR*     3.5    22.6    +      -       -      +
     93H  LEU*     3.6    13.2    -      -       +      +
    104H  PHE*     3.6    17.0    -      -       +      -
    115H  ALA      2.8    21.7    +      -       -      -
    116H  LEU      3.6     4.0    -      -       -      -
    118H  LYS*     1.3    73.1    -      -       -      +
    120H  ILE*     1.3    61.9    +      -       -      +
    122H  ASN      3.2     3.5    +      -       -      -
    123H  ILE*     3.0    35.4    +      -       +      +
    134H  TYR*     3.7    16.2    +      -       +      -
    165H  LEU*     3.8    27.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 120 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    347G  LEU*     4.2    18.8    -      -       +      -
    350G  LEU*     5.1     5.4    -      -       +      -
    351G  LEU*     3.8    28.5    -      -       +      -
    116H  LEU*     2.9    29.3    +      -       +      +
    117H  ARG*     3.7     8.3    -      -       -      +
    119H  THR*     1.3    76.9    -      -       -      +
    121H  ARG*     1.3    62.7    +      -       -      +
    123H  ILE*     3.0    19.1    +      -       +      +
    124H  ASP*     3.1    16.0    +      -       -      +
    164H  LEU*     6.0     0.7    -      -       +      -
    165H  LEU*     3.7    21.3    -      -       +      -
    168H  TYR*     3.6    38.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 121 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    357G  TYR*     2.9    47.4    +      -       +      +
     63H  ALA      5.7     1.8    +      -       -      -
     65H  ASP*     3.4    31.3    +      -       -      -
     68H  ARG*     3.4    48.2    +      -       -      +
    117H  ARG      3.1    16.2    +      -       -      +
    118H  LYS*     3.8     7.0    -      -       -      +
    120H  ILE*     1.3    77.7    -      -       -      +
    122H  ASN*     1.3    60.2    +      -       +      +
    124H  ASP*     3.5    15.9    +      -       -      +
    125H  LEU*     3.5    17.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 122 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     53H  PHE*     3.6    10.3    -      -       -      -
     55H  ASP*     3.2    35.1    -      -       +      +
     68H  ARG*     5.4     3.5    +      -       -      +
     89H  ALA*     4.3     1.0    -      -       -      +
     90H  THR      2.9    29.7    +      -       -      +
     91H  THR*     4.8     0.2    -      -       -      +
    118H  LYS      3.5     7.3    +      -       -      +
    119H  THR      3.2     4.1    +      -       -      +
    121H  ARG*     1.3    78.6    -      -       +      +
    123H  ILE*     1.3    60.7    +      -       -      +
    124H  ASP      3.2     0.4    -      -       -      -
    125H  LEU*     3.6    23.8    -      -       -      +
    126H  ALA*     3.0    26.5    +      -       -      +
    134H  TYR*     3.0    23.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 123 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    119H  THR*     3.0    30.1    +      -       +      +
    120H  ILE*     3.0    13.2    +      -       +      +
    122H  ASN*     1.3    75.7    -      -       -      +
    124H  ASP*     1.3    66.9    +      -       -      +
    126H  ALA*     3.3     2.9    +      -       -      +
    127H  VAL*     3.2    22.7    +      -       +      +
    134H  TYR*     3.9    24.0    -      -       +      -
    165H  LEU*     4.0    13.9    -      -       +      +
    168H  TYR*     4.6     7.0    -      -       +      -
    169H  VAL*     4.2    20.9    -      -       +      -
    174H  TYR*     4.2    15.9    -      -       +      -
    176H  ILE*     4.4    11.2    -      -       +      -
    178H  PHE*     3.7    30.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 124 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    120H  ILE*     3.1    13.5    +      -       -      +
    121H  ARG*     3.7    17.0    -      -       -      +
    122H  ASN      3.2     0.2    -      -       -      -
    123H  ILE*     1.3    77.2    -      -       -      +
    125H  LEU*     1.3    57.7    +      -       -      +
    127H  VAL*     3.3     5.4    +      -       -      +
    128H  GLU*     2.9    28.7    +      -       -      +
    168H  TYR*     2.7    29.3    +      -       -      -
    174H  TYR*     2.9    30.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 125 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     53H  PHE*     3.9    17.0    -      -       +      -
     55H  ASP*     5.8     0.2    -      -       -      -
     58H  LEU*     4.1     7.6    -      -       +      -
     59H  ILE*     3.8    26.5    -      -       +      -
     68H  ARG*     4.8     4.5    -      -       -      +
     72H  VAL*     3.7    32.1    -      -       +      -
    121H  ARG      3.5    11.0    +      -       -      +
    122H  ASN*     3.6    23.8    -      -       -      +
    123H  ILE      3.3     0.2    -      -       -      -
    124H  ASP*     1.3    79.0    -      -       -      +
    126H  ALA*     1.3    53.3    +      -       -      +
    128H  GLU*     3.0    21.3    +      -       -      +
    129H  LEU*     2.8    47.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 126 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     53H  PHE*     5.1     2.4    -      -       -      -
     89H  ALA*     3.8    25.1    -      -       +      -
    122H  ASN      3.0    15.2    +      -       -      +
    123H  ILE*     3.3    10.8    -      -       -      +
    124H  ASP      3.2     0.2    -      -       -      -
    125H  LEU*     1.3    77.9    -      -       -      +
    127H  VAL*     1.3    56.0    +      -       -      +
    129H  LEU*     3.2     6.0    +      -       -      +
    130H  GLY      3.1     4.3    +      -       -      -
    131H  ALA*     2.8    41.3    +      -       +      +
    134H  TYR*     3.9    12.3    -      -       +      -
    176H  ILE*     4.4     7.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 127 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    123H  ILE*     3.2    16.7    +      -       +      +
    124H  ASP      3.6     6.3    -      -       -      +
    126H  ALA*     1.3    72.5    -      -       -      +
    128H  GLU*     1.3    60.1    +      -       -      +
    130H  GLY*     2.8    23.5    +      -       -      +
    131H  ALA      4.2     8.3    -      -       -      +
    174H  TYR*     3.7    52.7    -      -       +      -
    175H  ASP      5.3     4.5    -      -       -      +
    176H  ILE*     4.8    12.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 128 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     72H  VAL*     3.8    18.9    -      -       -      +
     76H  ARG*     3.2    34.1    +      -       -      +
    124H  ASP      2.9    14.4    +      -       -      +
    125H  LEU*     3.0    27.8    +      -       +      +
    127H  VAL*     1.3    77.3    -      -       -      +
    129H  LEU*     1.3    59.7    +      -       +      +
    130H  GLY      3.5     0.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 129 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     53H  PHE*     3.8    34.1    -      -       +      -
     58H  LEU*     4.4    11.2    -      -       +      -
     72H  VAL*     4.8     5.8    -      -       +      -
     75H  PHE*     4.6    10.3    -      -       +      -
     76H  ARG*     4.4    31.0    -      -       +      +
     79H  LEU*     4.5    18.8    -      -       +      +
     86H  VAL*     4.1    25.1    +      -       +      +
    125H  LEU*     2.8    33.7    +      -       +      +
    126H  ALA*     3.8     4.7    -      -       -      +
    127H  VAL      3.0     0.4    -      -       -      -
    128H  GLU*     1.3    78.4    -      -       +      +
    130H  GLY*     1.3    61.3    +      -       -      +
    131H  ALA      3.4     1.5    +      -       -      +
----------------------------------------------------------
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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