Contacts of the helix formed by residues 136 - 160 (chain E) in PDB entry 6BAA


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 LEU 136 (chain E).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     68E  PHE*     5.3     8.1    -      -       +      -
     74E  ARG*     5.9     0.7    -      -       -      +
    123E  TYR*     4.4     1.6    -      -       -      -
    124E  TYR*     5.7     9.2    -      -       +      -
    127E  ILE*     3.6    18.7    -      -       +      +
    133E  PRO*     3.2    40.6    -      -       +      +
    135E  LEU*     1.3    74.6    -      -       -      +
    137E  ILE*     1.3    58.2    +      -       -      +
    138E  ALA      3.3     1.8    -      -       -      -
    139E  LEU*     3.1    25.9    +      -       +      +
    140E  LEU*     3.0    28.7    +      -       +      +
    186E  GLU*     4.4    23.3    -      -       +      -
    189E  VAL*     4.7    17.0    -      -       +      -
    190E  ILE*     5.0     7.4    -      -       +      -
    195E  TYR*     3.7    16.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 137 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133E  PRO      3.6     3.4    -      -       -      +
    134E  LYS*     3.5    32.5    -      -       +      +
    135E  LEU      3.2     1.4    -      -       -      -
    136E  LEU*     1.3    74.5    -      -       -      +
    138E  ALA*     1.3    66.6    +      -       -      +
    140E  LEU*     3.3    10.5    +      -       +      +
    141E  ILE*     3.0    36.5    +      -       +      +
    195E  TYR*     3.5    31.6    -      -       +      +
    196E  ILE*     5.5     4.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 138 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     38E  PHE*     5.0     1.2    -      -       +      -
     42E  ILE*     4.1    33.7    -      -       +      -
     43E  THR*     5.6     2.0    -      -       +      -
    123E  TYR*     4.2    15.7    -      -       +      +
    135E  LEU      4.0     2.3    +      -       -      +
    137E  ILE*     1.3    79.3    -      -       -      +
    139E  LEU*     1.3    58.3    +      -       -      +
    141E  ILE*     3.2    14.1    -      -       +      +
    142E  TYR*     2.8    32.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 139 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     39E  LEU*     6.4     0.7    -      -       -      -
     74E  ARG*     4.3    13.7    -      -       -      +
    120E  SER*     4.2    17.7    -      -       -      +
    123E  TYR*     3.7    32.2    -      -       +      -
    124E  TYR*     4.5    19.3    -      -       +      -
    127E  ILE*     5.8     0.7    -      -       +      -
    135E  LEU      4.5     0.4    +      -       -      -
    136E  LEU*     3.1    30.2    +      -       +      +
    138E  ALA*     1.3    78.9    -      -       -      +
    140E  LEU*     1.3    60.2    +      -       -      +
    142E  TYR*     3.1     9.3    +      -       +      +
    143E  TRP*     2.9    60.5    +      -       +      +
    186E  GLU*     4.2    16.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 140 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    136E  LEU*     3.0    16.9    +      -       +      +
    137E  ILE*     3.7    13.2    -      -       +      +
    139E  LEU*     1.3    76.8    -      -       -      +
    141E  ILE*     1.3    78.6    +      -       +      +
    143E  TRP      3.2     0.2    +      -       -      -
    144E  THR*     3.0    32.0    +      -       +      +
    183E  LEU*     3.7     7.7    -      -       +      +
    186E  GLU*     3.4    34.3    -      -       +      +
    187E  VAL*     4.9     9.2    -      -       +      -
    190E  ILE*     4.2    30.7    -      -       +      -
    195E  TYR*     5.1     1.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 141 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     38E  PHE*     4.0    28.9    -      -       +      -
     42E  ILE*     6.1     0.2    -      -       +      -
    137E  ILE*     3.0    26.9    +      -       +      +
    138E  ALA*     3.2    18.6    -      -       -      +
    140E  LEU*     1.3    90.9    -      -       +      +
    142E  TYR*     1.3    60.6    +      -       -      +
    144E  THR*     3.3    11.7    -      -       +      +
    145E  LEU*     2.9    39.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 142 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     35E  PRO*     3.2    44.2    -      -       +      -
     36E  HIS*     3.2    21.3    +      -       -      -
     38E  PHE*     4.8    11.9    -      +       +      -
     39E  LEU*     3.4    41.4    -      -       +      +
    113E  ALA      5.4     0.2    +      -       -      -
    116E  ALA*     4.0    11.8    -      -       -      +
    117E  ALA*     5.1     0.9    +      -       -      -
    138E  ALA      2.8    17.7    +      -       -      +
    139E  LEU*     3.4     9.2    -      -       +      +
    141E  ILE*     1.3    82.6    -      -       -      +
    143E  TRP*     1.3   104.0    +      +       -      +
    145E  LEU*     3.4     4.2    +      -       -      +
    146E  ALA*     3.0    28.9    +      -       +      +
    179E  TYR*     4.4     3.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with TRP 143 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     74E  ARG*     5.4     6.5    -      -       -      +
     78E  THR*     5.7     6.3    -      -       +      -
     81E  LEU*     4.8     9.9    -      -       +      -
    117E  ALA*     5.5     1.6    -      -       -      -
    120E  SER*     3.6    35.2    -      -       -      -
    139E  LEU*     2.9    50.6    +      -       +      +
    140E  LEU      3.2     0.6    +      -       -      -
    142E  TYR*     1.3   101.9    -      +       -      +
    144E  THR*     1.3    60.5    +      -       -      +
    146E  ALA*     3.5     2.1    +      -       -      +
    147E  PHE*     2.9    28.8    +      -       -      +
    179E  TYR*     3.8    47.8    -      +       -      +
    182E  LEU*     3.4    31.7    -      -       +      +
    183E  LEU*     3.7    13.6    -      -       +      +
    186E  GLU*     3.3    30.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 144 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    140E  LEU*     3.0    20.4    +      -       +      +
    141E  ILE*     3.3    20.6    -      -       +      +
    143E  TRP*     1.3    77.5    -      -       -      +
    145E  LEU*     1.3    60.3    +      -       -      +
    147E  PHE*     3.4     4.4    +      -       -      +
    148E  ILE*     2.9    37.6    +      -       -      +
    183E  LEU*     3.6    25.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 145 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     34E  VAL*     4.7     9.6    -      -       +      -
     35E  PRO*     3.7    29.4    -      -       +      -
     38E  PHE*     6.5     1.8    -      -       +      -
    141E  ILE*     2.9    28.6    +      -       +      +
    142E  TYR*     4.0     4.7    -      -       -      +
    144E  THR*     1.3    77.1    -      -       +      +
    146E  ALA*     1.3    59.4    +      -       -      +
    148E  ILE*     3.2     9.2    +      -       +      +
    149E  THR*     3.0    40.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 146 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     35E  PRO*     3.7    20.7    -      -       +      +
     36E  HIS*     4.6     4.5    -      -       +      -
    142E  TYR*     3.0    26.4    +      -       +      +
    143E  TRP*     3.9     1.3    -      -       -      +
    145E  LEU*     1.3    76.1    -      -       -      +
    147E  PHE*     1.3    57.6    +      -       -      +
    149E  THR*     2.7    21.5    +      -       -      -
    150E  LYS*     3.0    21.2    +      -       +      +
    179E  TYR*     3.6    29.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 147 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    143E  TRP      2.9    19.7    +      -       -      +
    144E  THR*     3.5     9.4    -      -       -      +
    146E  ALA*     1.3    77.1    -      -       -      +
    148E  ILE*     1.3    65.6    +      -       +      +
    150E  LYS*     3.8     3.1    -      -       -      +
    151E  THR*     2.3    51.8    +      -       +      -
    176E  VAL*     3.2    44.1    -      -       +      +
    177E  ILE*     4.9     2.7    -      -       +      -
    179E  TYR*     4.2    10.7    -      -       +      -
    180E  GLY*     3.6    22.7    -      -       -      -
    183E  LEU*     4.6    13.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 148 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    144E  THR*     2.9    28.4    +      -       -      +
    145E  LEU*     3.2     8.9    +      -       +      +
    147E  PHE*     1.3    88.9    -      -       +      +
    149E  THR*     1.3    62.4    +      -       +      +
    151E  THR*     3.2     9.3    +      -       +      +
    152E  ILE*     2.9    39.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 149 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     28E  VAL*     5.3     1.9    -      -       -      +
     31E  LEU*     3.7    34.9    -      -       +      +
     32E  ASN*     3.1    20.6    +      -       -      +
     34E  VAL*     5.6     0.2    -      -       +      -
     35E  PRO*     3.7    11.9    -      -       +      +
     36E  HIS*     6.1     0.3    -      -       -      -
    145E  LEU*     3.0    27.2    +      -       +      +
    146E  ALA*     2.7    25.3    +      -       -      -
    148E  ILE*     1.3    80.5    -      -       +      +
    150E  LYS*     1.3    55.8    +      -       -      +
    152E  ILE*     3.2     8.9    +      -       -      +
    153E  LYS*     3.0    25.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 150 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     32E  ASN*     3.3    19.5    -      -       -      +
     36E  HIS*     6.1     4.9    -      -       +      +
    146E  ALA*     3.0     9.4    +      -       +      +
    147E  PHE*     4.3     1.8    -      -       -      +
    149E  THR*     1.3    79.6    +      -       -      +
    151E  THR*     1.3    60.5    +      -       -      +
    153E  LYS*     3.3    11.6    +      -       +      +
    154E  PHE*     2.8    29.5    +      -       -      +
    172E  THR*     4.4     4.2    -      -       +      +
    175E  LEU*     2.7    65.7    +      -       +      +
    176E  VAL*     3.6    16.8    -      -       +      +
    179E  TYR*     3.2    43.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 151 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    147E  PHE*     2.3    51.0    +      -       +      -
    148E  ILE*     3.3    13.2    -      -       +      -
    149E  THR      3.2     0.2    -      -       -      -
    150E  LYS*     1.3    77.2    -      -       -      +
    152E  ILE*     1.3    62.1    +      -       +      +
    154E  PHE*     3.2     6.2    +      -       +      +
    155E  VAL*     2.9    40.8    +      -       +      +
    176E  VAL*     4.1     8.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 152 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     28E  VAL*     4.1    20.2    -      -       +      -
     31E  LEU*     4.8    10.8    -      -       +      -
    148E  ILE*     2.9    29.7    +      -       +      +
    149E  THR*     3.5     9.4    -      -       -      +
    151E  THR*     1.3    79.7    -      -       +      +
    153E  LYS*     1.3    64.4    +      -       -      +
    155E  VAL*     3.3    12.0    -      -       +      +
    156E  LYS*     3.0    37.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 153 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     28E  VAL*     4.4    19.4    -      -       +      +
     29E  ASP*     3.6    20.5    +      -       -      +
     32E  ASN*     3.2    27.6    +      -       -      +
    109E  PRO*     5.8     5.9    -      -       -      +
    149E  THR      3.0    13.6    +      -       -      +
    150E  LYS*     3.5    13.4    -      -       +      +
    152E  ILE*     1.3    77.6    -      -       -      +
    154E  PHE*     1.3    56.8    +      -       -      +
    156E  LYS*     3.5     2.2    +      -       -      +
    157E  PHE*     2.9    66.8    +      -       +      -
    168E  ARG*     5.0     8.1    -      -       -      +
    172E  THR*     4.3    15.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 154 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    150E  LYS      2.8    17.0    +      -       -      +
    151E  THR*     3.8     5.2    -      -       +      +
    153E  LYS*     1.3    73.8    -      -       -      +
    155E  VAL*     1.3    70.8    +      -       +      +
    157E  PHE*     3.2     8.1    +      -       +      +
    158E  TYR*     2.9    27.5    +      +       +      +
    169E  PHE*     3.2    58.1    -      +       -      -
    170E  CYS*     5.4     0.4    -      -       -      -
    172E  THR*     4.1     9.0    -      -       +      -
    173E  GLY*     3.5    28.9    -      -       -      -
    176E  VAL*     4.3    11.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 155 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    151E  THR*     2.9    30.5    +      -       +      +
    152E  ILE*     3.3    28.5    -      -       +      +
    154E  PHE*     1.3    85.2    -      -       +      +
    156E  LYS*     1.3    65.0    +      -       +      +
    158E  TYR*     3.2     9.5    +      -       +      +
    159E  ASP*     2.8    34.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 156 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     21E  VAL*     5.4     6.6    -      -       -      +
     23E  ASN*     3.8    47.0    -      -       +      +
     28E  VAL*     4.8     8.5    -      -       +      -
    152E  ILE*     3.0    34.5    +      -       +      +
    153E  LYS*     4.0     3.8    -      -       -      +
    155E  VAL*     1.3    79.0    -      -       +      +
    157E  PHE*     1.3    64.0    +      -       +      +
    159E  ASP*     3.2    22.0    +      -       +      +
    160E  HIS*     3.0    36.5    +      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 157 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     25E  GLY      6.0     0.9    -      -       -      -
     28E  VAL*     5.6     5.8    -      -       +      -
     29E  ASP*     5.3     2.2    -      -       -      -
    153E  LYS*     2.9    55.2    +      -       +      -
    154E  PHE*     3.3     9.6    -      -       -      +
    156E  LYS*     1.3    79.0    -      -       +      +
    158E  TYR*     1.3    58.0    +      -       -      +
    160E  HIS*     3.1     8.7    -      -       +      +
    161E  ALA*     3.0    26.7    +      -       -      +
    166E  GLN*     3.8    12.3    +      -       -      +
    168E  ARG*     4.1    22.2    -      -       +      -
    169E  PHE*     3.6    24.5    -      +       +      -
    172E  THR*     3.6    30.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 158 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    154E  PHE*     2.9    18.7    +      +       +      +
    155E  VAL*     3.6    10.8    -      -       +      +
    157E  PHE*     1.3    74.1    -      -       -      +
    159E  ASP*     1.3    71.1    +      -       -      +
    161E  ALA*     3.3    22.1    +      -       +      +
    169E  PHE*     3.7    25.7    -      +       +      -
----------------------------------------------------------
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Residues in contact with ASP 159 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     23E  ASN*     5.8     0.9    -      -       +      -
    155E  VAL*     2.8    23.7    +      -       -      +
    156E  LYS*     3.2    37.1    +      -       +      +
    158E  TYR*     1.3    83.7    -      -       -      +
    160E  HIS*     1.3    70.0    +      -       +      +
    161E  ALA      3.8     0.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with HIS 160 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     23E  ASN*     3.7    27.0    -      -       +      +
    156E  LYS*     3.0    28.2    +      -       +      +
    157E  PHE*     3.1     8.3    +      -       +      +
    159E  ASP*     1.3    86.2    +      -       +      +
    161E  ALA*     1.3    62.9    +      -       -      +
    162E  ILE*     3.8     4.0    +      -       -      +
    166E  GLN*     3.5    10.4    +      -       -      -
----------------------------------------------------------
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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