Contacts of the helix formed by residues 133 - 159 (chain F) in PDB entry 3V5I


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 ALA 133 (chain F).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    131F  GLY      3.9     1.0    +      -       -      -
    132F  GLN*     1.3    71.9    -      -       -      +
    134F  THR*     1.3    57.7    +      -       -      +
    136F  ILE*     3.3    11.2    +      -       -      +
    137F  GLU*     3.0    29.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 134 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132F  GLN*     4.3     4.7    -      -       -      +
    133F  ALA*     1.3    76.4    -      -       -      +
    135F  GLU*     1.3    57.4    +      -       -      +
    137F  GLU*     3.3    16.3    +      -       -      +
    138F  ILE*     3.1    34.9    +      -       +      +
    171G  ARG*     3.7    43.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 135 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    129F  ALA*     5.0     0.8    -      -       -      +
    130F  GLN      4.0     9.6    -      -       -      +
    131F  GLY*     3.5     8.0    -      -       -      -
    132F  GLN*     2.8    40.6    +      -       +      +
    134F  THR*     1.3    72.5    -      -       -      +
    136F  ILE*     1.3    64.9    +      -       -      +
    138F  ILE*     3.4    10.9    +      -       +      +
    139F  ALA*     3.1    22.0    +      -       -      +
    171G  ARG*     3.7    32.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 136 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    129F  ALA*     4.1    33.9    -      -       +      +
    130F  GLN*     4.5     1.1    -      -       -      -
    131F  GLY      3.5    28.9    -      -       -      +
    132F  GLN      2.9    15.9    +      -       -      +
    133F  ALA*     3.7    10.8    -      -       -      +
    135F  GLU*     1.3    69.7    -      -       -      +
    137F  GLU*     1.3    61.1    +      -       -      +
    139F  ALA*     3.1     3.1    +      -       -      +
    140F  ALA*     2.8    33.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 137 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133F  ALA      3.0    13.4    +      -       -      +
    134F  THR*     3.4    18.0    +      -       -      +
    136F  ILE*     1.3    75.7    -      -       -      +
    138F  ILE*     1.3    65.5    +      -       +      +
    140F  ALA*     3.3     7.2    +      -       +      +
    141F  ASN*     2.9    45.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 138 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    134F  THR*     3.1    30.9    +      -       +      +
    135F  GLU*     3.7    10.8    -      -       +      +
    136F  ILE      3.3     0.2    -      -       -      -
    137F  GLU*     1.3    79.0    -      -       +      +
    139F  ALA*     1.3    60.2    +      -       -      +
    141F  ASN*     3.5     8.3    +      -       -      +
    142F  HIS*     3.1    21.8    +      -       -      +
    171G  ARG*     3.8    29.8    -      -       +      -
    172G  ASP*     3.8    32.5    -      -       +      +
    174G  PHE*     4.4    13.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 139 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128F  GLY      4.4     6.7    -      -       -      +
    129F  ALA*     3.5    31.2    -      -       +      -
    135F  GLU      3.1    10.7    +      -       -      +
    136F  ILE      3.1     3.6    +      -       -      +
    138F  ILE*     1.3    74.7    -      -       -      +
    140F  ALA*     1.3    66.2    +      -       -      +
    142F  HIS*     3.3     7.3    +      -       -      +
    143F  ILE*     3.0    25.0    +      -       -      +
    174G  PHE*     5.6     2.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 140 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    129F  ALA*     5.3     0.6    -      -       -      +
    136F  ILE*     2.8    24.2    +      -       +      +
    137F  GLU*     3.7     7.9    -      -       -      +
    139F  ALA*     1.3    73.5    -      -       -      +
    141F  ASN*     1.3    64.8    +      -       -      +
    143F  ILE*     3.3     9.3    +      -       -      +
    144F  LEU*     3.0    35.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 141 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    137F  GLU*     2.9    39.6    +      -       -      +
    138F  ILE*     3.8     7.9    -      -       -      +
    140F  ALA*     1.3    76.6    -      -       -      +
    142F  HIS*     1.3    62.6    +      -       -      +
    144F  LEU*     3.3    12.6    +      -       -      +
    145F  LYS*     2.9    24.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 142 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     72F  THR*     6.0     1.3    -      -       +      -
    138F  ILE      3.1    17.9    +      -       -      +
    139F  ALA*     3.6     6.0    +      -       -      +
    140F  ALA      3.1     0.2    -      -       -      -
    141F  ASN*     1.3    79.8    -      -       -      +
    143F  ILE*     1.3    60.6    +      -       -      +
    145F  LYS*     3.2     8.0    +      -       +      +
    146F  THR*     3.0    40.5    +      -       -      -
     95G  MET*     4.7     2.5    -      -       +      -
    119G  GLU*     3.1    33.3    +      -       -      -
    174G  PHE*     3.5    58.7    -      +       +      -
----------------------------------------------------------
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Residues in contact with ILE 143 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    125F  PRO*     4.0    24.9    -      -       +      +
    126F  LEU      3.6    10.8    -      -       -      +
    127F  GLY*     3.6    32.8    -      -       -      +
    139F  ALA      3.0    14.9    +      -       -      +
    140F  ALA*     3.4    15.0    -      -       -      +
    142F  HIS*     1.3    77.5    -      -       -      +
    144F  LEU*     1.3    70.2    +      -       +      +
    146F  THR*     3.3     8.1    +      -       +      -
    147F  ARG*     2.9    27.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 144 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    124F  GLN*     6.3     0.9    -      -       -      +
    140F  ALA*     3.0    29.8    +      -       +      +
    141F  ASN*     3.8    11.2    -      -       -      +
    143F  ILE*     1.3    80.8    -      -       +      +
    145F  LYS*     1.3    64.7    +      -       -      +
    147F  ARG*     3.1    16.0    +      -       +      +
    148F  GLU*     3.1    27.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 145 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    141F  ASN      2.9    17.7    +      -       -      +
    142F  HIS*     3.6    10.5    -      -       +      +
    143F  ILE      3.2     0.2    -      -       -      -
    144F  LEU*     1.3    78.5    -      -       -      +
    146F  THR*     1.3    55.5    +      -       -      +
    148F  GLU*     3.2    20.5    +      -       -      +
    149F  LYS*     3.0    27.8    +      -       -      +
    176G  THR*     3.8    22.7    -      -       +      +
    179G  GLU*     3.8    22.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with THR 146 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     71F  VAL*     3.7    32.5    -      -       +      -
     75F  PHE*     5.2     3.4    -      -       +      -
    125F  PRO*     4.9     4.9    -      -       +      -
    142F  HIS*     3.0    26.4    +      -       -      -
    143F  ILE*     3.5    13.9    -      -       +      -
    145F  LYS*     1.3    74.6    -      -       -      +
    147F  ARG*     1.3    59.5    +      -       -      +
    149F  LYS*     3.3     8.9    +      -       +      +
    150F  LEU*     2.9    35.7    +      -       +      +
    119G  GLU*     3.7    20.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 147 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    124F  GLN*     3.5    36.3    +      -       -      +
    125F  PRO*     3.8    24.1    -      -       +      +
    143F  ILE      2.9    12.4    +      -       -      +
    144F  LEU*     3.1    20.2    +      -       +      +
    146F  THR*     1.3    77.9    -      -       -      +
    148F  GLU*     1.3    55.4    +      -       -      +
    150F  LEU*     3.2     3.2    +      -       +      +
    151F  ASN*     2.9    47.3    +      -       -      +
    166F  GLN*     3.0    53.6    +      -       -      +
    169F  THR*     2.9    39.0    +      -       -      -
    170F  ASP*     3.7     8.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 148 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    144F  LEU*     3.1    18.5    +      -       -      +
    145F  LYS*     3.2    22.1    +      -       +      +
    147F  ARG*     1.3    75.0    -      -       -      +
    149F  LYS*     1.3    58.4    +      -       -      +
    151F  ASN*     3.8     6.4    -      -       -      +
    152F  ARG*     2.9    35.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 149 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     75F  PHE*     3.5    35.1    -      -       +      -
    145F  LYS      3.0    12.8    +      -       -      +
    146F  THR*     3.5    13.5    -      -       -      +
    147F  ARG      3.2     0.2    -      -       -      -
    148F  GLU*     1.3    75.9    -      -       -      +
    150F  LEU*     1.3    63.8    +      -       -      +
    152F  ARG*     3.3    28.9    +      -       -      +
    153F  ILE*     3.2    24.7    +      -       +      +
    117G  ASN*     2.8    44.1    +      -       -      +
    118G  ALA      4.6     0.8    +      -       -      -
    119G  GLU*     3.5    30.5    +      -       -      +
    176G  THR*     6.2     4.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 150 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     71F  VAL*     4.3     2.7    -      -       +      -
     75F  PHE*     3.6    28.9    -      -       +      -
     99F  MET*     3.6    34.3    -      -       +      -
    102F  PHE*     3.7    24.5    -      -       +      -
    125F  PRO*     4.0    30.7    -      -       +      -
    146F  THR*     2.9    29.2    +      -       +      +
    147F  ARG*     3.2     4.5    +      -       +      +
    149F  LYS*     1.3    78.3    -      -       -      +
    151F  ASN*     1.3    68.5    +      -       -      +
    153F  ILE*     3.2     1.0    +      -       -      -
    154F  LEU*     2.9    26.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 151 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    147F  ARG*     2.9    32.4    +      -       -      +
    148F  GLU*     3.9     6.1    -      -       -      +
    150F  LEU*     1.3    79.5    -      -       -      +
    152F  ARG*     1.3    58.0    +      -       -      +
    154F  LEU*     3.3     3.7    +      -       -      +
    155F  SER*     2.8    31.4    +      -       -      -
    162F  ILE*     4.3    14.2    +      -       +      +
    165F  ILE*     3.6    29.3    -      -       +      +
    166F  GLN*     3.0    43.8    +      -       -      +
    169F  THR*     4.3     6.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 152 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    148F  GLU*     2.9    20.7    +      -       -      +
    149F  LYS*     3.7    36.1    -      -       -      +
    151F  ASN*     1.3    78.2    -      -       -      +
    153F  ILE*     1.3    71.1    +      -       -      +
    155F  SER*     3.2     3.6    +      -       -      -
    156F  GLU*     3.2    39.2    +      -       +      +
    162F  ILE*     4.3    23.0    -      -       +      +
    117G  ASN*     4.0    21.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 153 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     75F  PHE*     3.8    17.5    -      -       +      -
     78F  TYR*     3.3    33.2    -      -       +      +
    102F  PHE*     3.7    14.6    -      -       +      -
    149F  LYS*     3.2    18.1    +      -       +      +
    150F  LEU      3.9     3.1    -      -       -      +
    152F  ARG*     1.3    89.0    -      -       -      +
    154F  LEU*     1.3    62.3    +      -       -      +
    156F  GLU*     3.2    17.1    +      -       -      +
    157F  ARG*     3.2    27.5    +      -       +      +
    117G  ASN*     3.4    39.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 154 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101F  SER*     6.1     0.2    -      -       -      +
    102F  PHE*     3.9    28.2    -      -       +      -
    105F  ALA*     4.2    14.6    -      -       +      -
    122F  ILE*     5.0    14.8    -      -       +      -
    150F  LEU*     2.9    18.6    +      -       +      +
    151F  ASN*     3.7     7.0    -      -       -      +
    153F  ILE*     1.3    76.3    -      -       -      +
    155F  SER*     1.3    63.1    +      -       -      +
    157F  ARG*     3.2     3.2    +      -       +      +
    158F  THR*     2.8    40.4    +      -       +      +
    165F  ILE*     4.1    27.4    -      -       +      -
    169F  THR*     5.3     5.6    -      -       +      -
    183F  TYR*     5.8     0.7    -      -       +      -
    185F  LEU*     4.2    23.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 155 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    151F  ASN      2.8    17.3    +      -       -      -
    152F  ARG      3.3     6.1    -      -       -      -
    154F  LEU*     1.3    76.5    -      -       -      +
    156F  GLU*     1.3    59.2    +      -       -      +
    158F  THR*     3.9     2.0    -      -       -      -
    159F  GLY*     2.9    31.7    +      -       -      -
    160F  GLN      2.7    24.6    +      -       -      -
    161F  SER*     4.1     1.1    -      -       -      -
    162F  ILE*     3.6    29.2    +      -       -      +
    165F  ILE*     4.5     4.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 156 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     78F  TYR*     5.3     1.7    +      -       -      -
    109F  LYS*     3.7    11.0    +      -       -      -
    152F  ARG*     3.2    33.6    +      -       +      +
    153F  ILE*     3.4    22.9    -      -       -      +
    154F  LEU      3.2     0.4    -      -       -      -
    155F  SER*     1.3    78.3    -      -       -      +
    157F  ARG*     1.3    61.9    +      -       +      +
    159F  GLY*     4.3     3.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 157 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     78F  TYR*     3.2    28.5    +      -       -      -
     82F  GLN*     3.6    31.9    -      -       -      +
    102F  PHE*     5.7     0.9    -      -       -      -
    105F  ALA*     3.5    36.7    +      -       +      +
    106F  ALA*     4.0     8.9    +      -       -      +
    107F  GLY      3.7    16.2    +      -       -      -
    109F  LYS*     3.8    36.1    +      -       -      +
    112F  ARG*     3.0    27.5    +      -       -      +
    153F  ILE*     3.2    20.2    -      -       +      +
    154F  LEU*     3.2     6.3    +      -       -      +
    156F  GLU*     1.3    82.4    +      -       +      +
    158F  THR*     1.3    62.3    +      -       -      +
    184F  GLY      3.4     2.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 158 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    105F  ALA*     5.1     1.1    -      -       +      -
    154F  LEU*     2.8    32.1    +      -       +      +
    155F  SER      3.6     0.7    +      -       -      -
    157F  ARG*     1.3    78.8    -      -       +      +
    159F  GLY*     1.3    62.1    +      -       -      +
    160F  GLN*     3.1    22.6    +      -       -      +
    165F  ILE*     4.1     1.7    -      -       -      +
    183F  TYR*     3.6    27.5    -      -       +      +
    184F  GLY*     3.4    25.4    -      -       -      +
    185F  LEU*     3.8    28.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 159 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    155F  SER      2.9    12.0    +      -       -      -
    156F  GLU      4.3     3.6    +      -       -      -
    157F  ARG      3.6     1.2    -      -       -      -
    158F  THR*     1.3    77.6    -      -       -      +
    160F  GLN*     1.3    64.0    +      -       -      +
    161F  SER      4.1     0.2    +      -       -      -
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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
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  Atomic class           I  II  III   IV   V   VI  VII  VIII
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   I  (Hydrophilic)      +   +    +    -   +   +    +    +
  II  (Acceptor)         +   -    +    -   +   +    +    -
 III  (Donor)            +   +    -    -   +   +    -    +
  IV  (Hydrophobic)      -   -    -    +   +   +    +    +
   V  (Aromatic)         +   +    +    +   +   +    +    +
  VI  (Neutral)          +   +    +    +   +   +    +    +
 VII  (Neutral-donor)    +   +    -    +   +   +    -    +
VIII  (Neutral-acceptor) +   -    +    +   +   +    +    -
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Warning!
Atom classes for heterogroups are automatically assigned based on the atomic coordinates. However, in three cases (see below) the automatic assignment is currently ambiguous. In these cases, the user is advised to manually analyse the full list of contacts using LPC software.
1. Carbon atoms belonging to a 4-, 5- or 6-member ring are 
   considered "aromatic" (Class V) if the ring is approximately
   planar, and "hydrophobic" (Class IV) or "neutral" (Classes
   VI, VII, VIII) if the ring is non-planar.
2. The oxygen atom of a carbonyl or hydroxy group is considered
   "hydroxy" (Class I) if the CO bond is longer than 1.29 Å, and
   "carbonyl" (Class II) if shorter.
3. All nitrogen atoms are considered "hydrophilic" (Class I).

Please E-mail any questions and/or suggestions concerning this page to Vladimir.Sobolev@weizmann.ac.il