Contacts of the helix formed by residues 154 - 176 (chain C) in PDB entry 4GCK


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 154 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    152C  THR      4.1     0.2    +      -       -      -
    153C  LEU*     1.3    73.5    -      -       -      +
    155C  GLU*     1.3    62.4    +      -       -      +
    156C  THR*     2.4    51.1    +      -       -      -
    157C  LEU*     3.2    16.3    +      -       +      +
    158C  LEU*     3.0    28.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 155 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    137C  ARG*     3.8    18.2    -      -       +      -
    140C  MET*     3.6    30.7    -      -       +      +
    141C  ARG*     3.5    37.1    -      -       +      +
    144C  LYS*     3.7    23.1    +      -       -      +
    151C  TYR*     4.3     8.4    +      -       +      +
    153C  LEU      4.1     9.2    -      -       -      +
    154C  ASP*     1.3    76.0    +      -       -      +
    156C  THR*     1.3    58.7    +      -       -      +
    158C  LEU*     3.7     7.4    -      -       -      -
    159C  ALA*     2.8    33.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 156 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133C  GLU*     4.4     4.0    -      -       -      +
    137C  ARG*     3.6    31.6    -      -       -      +
    154C  ASP*     2.4    34.7    +      -       -      -
    155C  GLU*     1.3    69.5    -      -       -      +
    157C  LEU*     1.3    57.8    +      -       -      -
    159C  ALA*     4.0     0.7    -      -       -      +
    160C  SER*     2.8    29.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 157 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    153C  LEU*     4.6    19.7    -      -       +      -
    154C  ASP*     3.2    18.8    +      -       +      +
    156C  THR*     1.3    80.1    -      -       -      +
    158C  LEU*     1.3    62.3    +      -       -      +
    160C  SER*     3.1     5.8    +      -       -      -
    161C  GLN*     3.0    25.8    +      -       -      +
    185D  ASP*     4.4    13.7    -      -       +      -
    188D  ALA*     4.0    28.5    -      -       +      +
    189D  ARG*     3.5    46.1    +      -       +      +
    192D  LEU*     4.1    16.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 158 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    140C  MET*     3.5    18.4    -      -       +      -
    151C  TYR*     3.7    33.2    -      -       +      -
    153C  LEU*     4.1    16.8    -      -       +      +
    154C  ASP      3.0    15.6    +      -       -      +
    155C  GLU*     3.8     1.6    -      -       -      +
    157C  LEU*     1.3    77.3    -      -       +      +
    159C  ALA*     1.3    56.8    +      -       -      +
    161C  GLN*     3.3     6.3    -      -       +      +
    162C  LEU*     3.0    30.1    +      -       -      +
    196C  GLN*     3.7    22.2    -      -       +      +
    197C  LEU*     4.2    10.7    -      -       +      +
    198C  GLN      3.5    22.7    -      -       -      +
    192D  LEU*     3.8    20.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 159 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133C  GLU*     3.8    31.4    -      -       +      +
    136C  LEU*     4.0    16.1    -      -       +      +
    137C  ARG*     4.0    10.8    -      -       +      +
    140C  MET*     3.6    10.7    -      -       -      -
    155C  GLU      2.8    21.8    +      -       -      +
    156C  THR      4.2     2.0    -      -       -      +
    158C  LEU*     1.3    71.7    -      -       -      +
    160C  SER*     1.3    60.3    +      -       -      +
    162C  LEU*     3.2     4.3    +      -       -      +
    163C  LEU*     2.9    28.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 160 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133C  GLU*     3.3    22.4    +      -       -      -
    156C  THR*     2.8    23.0    +      -       -      +
    157C  LEU*     3.1     3.3    +      -       -      -
    159C  ALA*     1.3    77.6    -      -       -      +
    161C  GLN*     1.3    53.1    +      -       -      +
    163C  LEU*     3.7     1.3    -      -       -      +
    164C  ALA*     2.8    35.7    +      -       -      +
    169D  MET*     5.4     0.2    -      -       -      +
    172D  ARG*     3.5    19.0    +      -       -      +
    189D  ARG*     3.0    38.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 161 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    157C  LEU      3.0    17.1    +      -       -      +
    158C  LEU*     3.3    10.3    -      -       +      +
    160C  SER*     1.3    78.6    +      -       -      +
    162C  LEU*     1.3    62.3    +      -       +      +
    164C  ALA*     3.4     5.2    +      -       -      +
    165C  PHE*     3.3    19.9    +      -       -      +
    196C  GLN*     2.3    50.6    -      -       +      +
    165D  PHE*     3.8    15.0    -      -       -      -
    169D  MET*     5.4     0.2    -      -       -      +
    189D  ARG*     2.9    43.7    +      -       -      +
    192D  LEU*     4.4    11.9    -      -       +      -
    193D  VAL*     3.4    23.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 162 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     88C  LEU*     3.9    24.9    -      -       +      -
     92C  VAL*     4.3    13.7    -      -       +      -
    136C  LEU*     4.4    15.3    -      -       +      -
    140C  MET*     3.3    27.8    -      -       +      -
    158C  LEU      3.0    15.4    +      -       -      +
    159C  ALA      3.2     6.7    +      -       -      +
    161C  GLN*     1.3    73.6    -      -       +      +
    163C  LEU*     1.3    63.2    +      -       -      +
    165C  PHE*     3.2     7.5    +      -       -      +
    166C  CYS*     3.1    25.5    +      -       -      -
    190C  TRP*     4.2    11.9    -      -       +      -
    193C  VAL*     3.3    33.4    -      -       +      +
    196C  GLN*     5.9     1.8    -      -       +      +
    197C  LEU*     4.3    13.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 163 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     95C  ILE*     4.8     6.5    -      -       +      -
    129C  PHE*     3.7    33.0    -      -       +      +
    132C  ILE*     4.3    19.3    -      -       +      -
    133C  GLU*     3.1    31.6    -      -       +      +
    136C  LEU*     4.7     6.0    -      -       +      +
    159C  ALA      2.9    17.0    +      -       -      +
    160C  SER*     3.8     1.8    -      -       -      +
    162C  LEU*     1.3    77.1    -      -       -      +
    164C  ALA*     1.3    58.6    +      -       -      +
    166C  CYS*     3.2    13.5    +      -       +      +
    167C  GLU*     2.9    37.0    +      -       +      +
    172D  ARG*     3.1    28.0    -      -       -      +
    175D  ARG*     4.3     2.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 164 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    160C  SER      2.8    22.9    +      -       -      +
    161C  GLN*     3.7     7.6    -      -       -      +
    162C  LEU      3.2     0.2    -      -       -      -
    163C  LEU*     1.3    73.6    -      -       -      +
    165C  PHE*     1.3    57.3    +      -       -      +
    167C  GLU*     4.6     0.4    -      -       -      -
    168C  GLY*     2.8    25.5    +      -       -      -
    164D  ALA      3.9     2.4    -      -       -      +
    165D  PHE*     4.6    11.0    -      -       +      +
    168D  GLY*     3.2    16.6    -      -       -      -
    169D  MET*     4.0    28.7    -      -       +      +
    172D  ARG*     4.1    14.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 165 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     92C  VAL*     4.0    28.7    -      -       +      -
     96C  LEU*     4.0    14.1    -      -       +      -
    161C  GLN      3.3     8.7    +      -       -      +
    162C  LEU*     3.2    11.6    +      -       -      +
    163C  LEU      3.2     0.2    -      -       -      -
    164C  ALA*     1.3    76.8    -      -       -      +
    166C  CYS*     1.3    67.3    +      -       -      +
    168C  GLY*     3.2     1.2    +      -       -      -
    169C  MET*     2.9    57.0    +      -       +      +
    186C  PHE*     5.3     4.5    -      +       -      -
    189C  ARG*     4.2    15.5    -      -       +      -
    190C  TRP*     5.7     0.9    -      +       -      -
    193C  VAL*     3.9    29.4    -      -       +      -
    196C  GLN*     5.7     3.6    -      -       -      +
    161D  GLN*     3.5    36.1    -      -       -      -
    164D  ALA*     4.5    16.1    -      -       +      +
    165D  PHE*     5.3     3.5    -      -       +      +
    196D  GLN*     5.3     1.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with CYS 166 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     92C  VAL*     3.9    40.6    -      -       -      -
     95C  ILE*     4.1    23.6    -      -       +      -
     96C  LEU*     3.9    19.9    -      -       +      +
    129C  PHE*     6.3     0.4    -      -       +      -
    136C  LEU*     6.4     0.9    -      -       -      -
    162C  LEU      3.1    16.9    +      -       -      -
    163C  LEU*     3.2    16.6    +      -       +      +
    165C  PHE*     1.3    80.4    -      -       -      +
    167C  GLU*     1.3    63.0    +      -       +      +
    169C  MET*     3.2     2.9    +      -       -      +
    170C  LEU*     3.0    31.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 167 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    110C  THR*     5.1     1.1    -      -       -      +
    129C  PHE*     3.9    25.4    -      -       +      -
    163C  LEU*     2.9    21.0    +      -       +      +
    164C  ALA      3.9     3.6    -      -       -      +
    166C  CYS*     1.3    76.8    -      -       +      +
    168C  GLY*     1.3    56.2    +      -       -      +
    170C  LEU*     3.8     6.7    -      -       +      +
    171C  SER*     2.9    34.6    +      -       -      -
    168D  GLY*     4.1    10.1    -      -       -      +
    171D  SER*     3.4    16.2    +      -       -      +
    172D  ARG*     3.0    29.4    +      -       -      +
    175D  ARG*     2.6    50.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 168 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    164C  ALA      2.8    11.2    +      -       -      -
    165C  PHE      3.6     1.6    -      -       -      -
    166C  CYS      3.1     0.2    -      -       -      -
    167C  GLU*     1.3    75.5    -      -       -      +
    169C  MET*     1.3    63.3    +      -       -      +
    171C  SER*     3.5     2.8    +      -       -      -
    172C  ARG*     3.2    26.3    +      -       -      +
    164D  ALA*     3.2    31.4    -      -       -      -
    167D  GLU*     4.2     6.0    -      -       -      +
    168D  GLY*     3.5    10.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with MET 169 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     96C  LEU*     4.4    14.1    -      -       +      -
    165C  PHE*     2.9    47.6    +      -       +      +
    166C  CYS*     3.8     4.0    -      -       -      +
    168C  GLY*     1.3    72.5    -      -       -      +
    170C  LEU*     1.3    62.2    +      -       -      +
    172C  ARG*     3.3    13.5    +      -       -      +
    173C  PHE*     3.0    27.3    +      -       -      +
    180C  TYR      4.6     2.6    -      -       -      +
    181C  ARG      4.7     4.0    -      -       -      +
    182C  PRO*     3.4    33.1    -      -       +      +
    184C  ASP      4.9     0.7    -      -       -      +
    189C  ARG*     3.6    37.0    -      -       -      +
    160D  SER      5.5     0.7    -      -       -      +
    164D  ALA*     3.9    16.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 170 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     95C  ILE*     4.2    24.0    -      -       +      +
     96C  LEU*     4.7     4.5    -      -       +      -
     99C  GLY*     4.2    15.0    -      -       -      -
    106C  THR*     3.8    17.4    -      -       +      +
    109C  LEU*     4.0    28.3    -      -       +      -
    110C  THR*     3.8    15.7    -      -       +      -
    129C  PHE*     5.3     7.6    -      -       +      -
    166C  CYS*     3.0    23.7    +      -       +      +
    167C  GLU*     3.9     6.3    -      -       -      +
    169C  MET*     1.3    73.6    -      -       -      +
    171C  SER*     1.3    67.1    +      -       -      +
    173C  PHE*     3.2     4.1    +      -       -      +
    174C  VAL*     2.9    27.2    +      -       -      +
    182C  PRO*     4.2    24.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 171 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    110C  THR*     3.9    15.3    -      -       -      +
    112C  HIS*     5.1     8.2    -      -       -      -
    167C  GLU      2.9    22.4    +      -       -      -
    168C  GLY*     3.7     7.4    -      -       -      -
    169C  MET      3.3     0.2    -      -       -      -
    170C  LEU*     1.3    75.6    -      -       -      +
    172C  ARG*     1.3    57.8    +      -       -      +
    174C  VAL*     3.3     4.1    +      -       -      +
    175C  ARG*     2.9    34.2    +      -       -      +
    110D  THR      6.0     1.8    -      -       -      -
    112D  HIS*     6.1     0.5    -      -       -      -
    167D  GLU*     4.3    16.6    +      -       -      -
    171D  SER*     3.7    22.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 172 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    168C  GLY      3.2    10.6    +      -       -      +
    169C  MET*     3.6    15.8    -      -       -      +
    170C  LEU      3.2     0.4    -      -       -      -
    171C  SER*     1.3    76.2    -      -       -      +
    173C  PHE*     1.3    57.6    +      -       -      +
    175C  ARG*     3.3    15.8    -      -       -      +
    176C  SER*     2.7    37.9    +      -       -      -
    180C  TYR*     3.3    41.4    -      -       +      +
    189C  ARG*     6.0     0.4    -      -       -      -
    130D  GLU*     5.0     0.4    +      -       -      -
    133D  GLU*     3.2    31.9    +      -       -      -
    160D  SER*     3.1    44.9    +      -       -      +
    163D  LEU*     4.1     4.9    -      -       -      +
    164D  ALA*     4.9     9.1    -      -       -      +
    167D  GLU*     3.1    28.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 173 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99C  GLY      3.4    23.6    -      -       -      -
    100C  GLU*     3.7    25.6    -      -       +      -
    103C  PRO*     4.1     9.4    -      -       +      -
    106C  THR*     4.1    17.9    -      -       +      -
    169C  MET      3.0    12.9    +      -       -      +
    170C  LEU      3.3     8.5    -      -       -      +
    172C  ARG*     1.3    77.2    -      -       -      +
    174C  VAL*     1.3    56.1    +      -       -      +
    176C  SER*     3.1     5.0    +      -       -      -
    178C  PHE*     2.7    87.0    +      +       +      -
    180C  TYR      3.2    25.0    +      -       -      +
    181C  ARG*     3.9    12.6    -      -       -      -
    182C  PRO*     3.6    22.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 174 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    106C  THR*     3.7    20.2    -      -       +      -
    107C  ARG*     4.1    29.2    +      -       +      +
    110C  THR*     3.5    20.4    -      -       +      +
    112C  HIS*     3.8    30.5    -      -       +      +
    170C  LEU      2.9    15.7    +      -       -      +
    171C  SER*     3.6     7.6    -      -       -      +
    173C  PHE*     1.3    77.1    -      -       -      +
    175C  ARG*     1.3    57.9    +      -       -      +
    177C  GLU*     2.8    34.5    +      -       -      +
    178C  PHE*     4.1    12.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 175 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    112C  HIS*     6.5     0.4    -      -       +      -
    171C  SER*     2.9    32.1    +      -       -      +
    172C  ARG*     3.3    26.7    +      -       -      +
    174C  VAL*     1.3    74.7    -      -       -      +
    176C  SER*     1.3    60.5    +      -       -      +
    177C  GLU*     3.3     9.7    +      -       -      +
    180C  TYR*     4.3    11.9    -      -       -      -
    109D  LEU      5.3     1.8    -      -       -      -
    110D  THR      5.7     6.3    -      -       -      +
    122D  GLN*     4.0    24.4    -      -       -      +
    126D  ASN*     2.8    61.5    +      -       -      +
    129D  PHE*     3.6    38.9    -      -       -      +
    130D  GLU*     4.7     7.5    +      -       -      -
    163D  LEU*     4.4     4.9    -      -       -      +
    167D  GLU*     2.7    40.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 176 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    172C  ARG      2.7    20.5    +      -       -      -
    173C  PHE      3.1     6.1    +      -       -      -
    175C  ARG*     1.3    79.6    -      -       -      +
    177C  GLU*     1.3    68.9    +      -       -      +
    179C  LYS*     3.3    19.7    +      -       -      +
    180C  TYR*     3.1    49.6    +      -       -      +
    126D  ASN*     4.5     6.7    -      -       -      +
----------------------------------------------------------
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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