Contacts of the helix formed by residues 169 - 195 (chain C) in PDB entry 5E9W


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 ILE 169 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    167C  SER      5.2     1.3    -      -       -      +
    168C  ARG*     1.3    74.4    -      -       -      +
    170C  PHE*     1.3    65.7    +      -       -      +
    171C  TYR      3.3     3.1    -      -       -      -
    172C  LEU*     3.1    17.3    +      -       +      +
    173C  ARG*     2.9    49.2    +      -       +      +
    340C  ILE*     4.4    16.4    -      -       +      -
    362C  LEU*     4.4    23.6    -      -       +      +
    363C  GLU*     3.0    44.0    -      -       +      +
    460C  GLU*     5.8     0.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 170 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    167C  SER*     3.4    30.9    +      -       -      +
    168C  ARG      3.4     2.4    -      -       -      -
    169C  ILE*     1.3    77.7    -      -       -      +
    171C  TYR*     1.3   100.8    +      +       +      +
    173C  ARG*     3.5    24.5    +      -       -      +
    174C  ASN*     3.1    28.0    +      -       +      +
    415C  MET      4.7    13.2    -      -       -      -
    416C  GLN*     4.9     9.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 171 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    167C  SER      5.2     6.1    -      -       -      -
    168C  ARG      4.9     2.8    +      -       -      -
    169C  ILE      3.3     0.6    -      -       -      -
    170C  PHE*     1.3   105.6    -      +       +      +
    172C  LEU*     1.3    60.4    +      -       -      +
    174C  ASN*     3.4     6.0    +      -       -      +
    175C  PHE*     2.8    29.8    +      -       -      +
    416C  GLN*     4.5    26.7    +      -       +      -
    455C  THR      5.3     4.5    -      -       -      +
    456C  LEU*     4.0     8.3    -      -       +      +
    460C  GLU*     4.0    26.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 172 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    169C  ILE*     3.1    18.3    +      -       +      +
    171C  TYR*     1.3    75.8    -      -       -      +
    173C  ARG*     1.3    64.4    +      -       -      +
    175C  PHE*     3.3     4.8    +      -       +      +
    176C  ASN*     3.0    38.6    +      -       -      +
    340C  ILE*     3.7    33.9    -      -       +      -
    362C  LEU*     4.3    19.5    -      -       +      -
    456C  LEU*     4.6     7.7    -      -       +      +
    460C  GLU*     3.6    34.1    +      -       +      +
    463C  ALA*     4.0    10.8    -      -       +      -
    464C  THR*     3.8    22.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 173 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    167C  SER      4.4     8.7    -      -       -      +
    169C  ILE*     2.9    36.0    +      -       +      +
    170C  PHE*     3.8    38.5    -      -       -      +
    172C  LEU*     1.3    75.7    -      -       -      +
    174C  ASN*     1.3    66.0    +      -       -      +
    176C  ASN*     3.3    11.4    +      -       -      +
    177C  ASN*     3.0    36.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 174 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    170C  PHE*     3.1    27.0    +      -       +      +
    171C  TYR*     3.4    10.5    +      -       -      +
    172C  LEU      3.2     0.2    -      -       -      -
    173C  ARG*     1.3    81.9    -      -       +      +
    175C  PHE*     1.3    60.1    +      -       -      +
    177C  ASN*     3.3     9.1    +      -       -      +
    178C  TRP*     3.0    25.6    +      -       -      +
    412C  LEU*     4.4    10.1    -      -       -      +
    415C  MET*     2.9    36.8    -      -       -      +
    416C  GLN      2.6    36.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 175 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    171C  TYR      2.8    17.9    +      -       -      +
    172C  LEU*     3.6     5.6    -      -       +      +
    174C  ASN*     1.3    78.8    -      -       -      +
    176C  ASN*     1.3    62.2    +      -       -      +
    178C  TRP*     3.1    13.8    +      +       -      +
    179C  MET*     2.9    63.4    +      -       +      +
    395C  PHE*     4.4     4.3    -      +       +      -
    399C  TYR*     3.6    28.5    -      +       +      -
    412C  LEU*     4.5     7.4    -      -       +      -
    455C  THR*     4.3    12.3    -      -       +      -
    456C  LEU*     3.8    27.8    -      -       +      -
    461C  TRP*     3.6    26.7    -      +       -      -
    464C  THR*     3.6    29.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 176 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    172C  LEU*     3.0    27.5    +      -       -      +
    173C  ARG*     3.5    11.7    -      -       -      +
    174C  ASN      3.3     0.2    -      -       -      -
    175C  PHE*     1.3    75.5    -      -       -      +
    177C  ASN*     1.3    57.5    +      -       -      +
    179C  MET*     3.4     8.8    +      -       -      +
    180C  LYS*     3.1    34.9    +      -       -      +
    285C  PHE*     4.0    33.0    -      -       +      -
    362C  LEU*     6.0     3.8    -      -       -      +
    395C  PHE*     4.0     6.2    -      -       -      -
    464C  THR*     3.6    20.3    +      -       -      -
    467C  TYR*     5.5     6.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 177 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    173C  ARG*     3.0    30.6    +      -       -      +
    174C  ASN*     3.4    11.5    -      -       -      +
    175C  PHE      3.2     0.2    -      -       -      -
    176C  ASN*     1.3    74.8    -      -       -      +
    178C  TRP*     1.3    59.2    +      -       -      +
    180C  LYS*     3.4    12.9    +      -       -      +
    181C  SER*     2.8    33.0    +      -       -      -
    210C  GLY*     4.1     4.0    +      -       -      +
    214C  LYS*     2.6    34.6    +      -       -      +
    415C  MET*     3.7    14.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with TRP 178 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    174C  ASN      3.0    13.6    +      -       -      +
    175C  PHE*     3.1    10.7    +      +       -      +
    177C  ASN*     1.3    73.4    -      -       -      +
    179C  MET*     1.3    93.4    +      -       +      +
    181C  SER*     3.3     3.4    +      -       -      -
    182C  VAL*     3.1    43.5    +      -       +      +
    398C  PHE*     5.5     0.4    -      +       -      -
    399C  TYR*     4.0    27.1    -      +       -      -
    402C  LYS*     4.0    22.7    -      -       +      -
    403C  ILE*     4.4    11.7    -      -       +      -
    408C  ASN*     2.9    39.2    +      -       +      -
    411C  LEU*     3.7    16.7    -      -       +      +
    412C  LEU*     3.3    48.9    -      -       +      +
    415C  MET*     3.7    11.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with MET 179 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    175C  PHE*     2.9    52.0    +      -       +      +
    176C  ASN*     3.5     8.7    -      -       -      +
    177C  ASN      3.3     0.2    -      -       -      -
    178C  TRP*     1.3    90.4    -      -       +      +
    180C  LYS*     1.3    61.9    +      -       +      +
    182C  VAL      3.4     0.3    +      -       -      -
    183C  LEU*     3.0    25.2    +      -       -      +
    317C  THR*     5.9     1.3    -      -       +      -
    395C  PHE*     3.4    63.7    -      -       +      +
    398C  PHE*     3.5    38.8    -      -       +      -
    399C  TYR*     4.5     1.6    -      -       -      -
    469C  VAL*     4.1     2.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 180 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    176C  ASN*     3.1    21.5    +      -       -      +
    177C  ASN*     3.7    22.8    +      -       -      +
    179C  MET*     1.3    76.7    -      -       +      +
    181C  SER*     1.3    55.0    +      -       -      +
    183C  LEU*     3.3     7.0    +      -       -      +
    184C  ILE*     2.8    43.6    +      -       +      +
    210C  GLY*     4.7     2.8    -      -       -      -
    211C  ASP*     2.7    34.0    +      -       -      +
    214C  LYS*     4.0     8.5    -      -       +      -
    284C  GLN*     3.6    34.1    -      -       +      +
    285C  PHE*     3.9    16.3    -      -       +      -
    317C  THR*     5.0     3.4    -      -       +      +
    501C  SAH      2.6    32.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 181 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    177C  ASN      2.8    21.9    +      -       -      -
    178C  TRP*     3.4     9.6    -      -       -      -
    180C  LYS*     1.3    76.9    -      -       -      +
    182C  VAL*     1.3    53.5    +      -       -      +
    184C  ILE*     3.7     2.7    -      -       -      +
    185C  GLY*     2.7    32.1    +      -       -      -
    214C  LYS*     3.4    25.1    -      -       -      +
    411C  LEU*     4.4    18.8    -      -       -      +
    415C  MET*     4.5     8.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 182 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    178C  TRP*     3.1    48.0    +      -       +      +
    179C  MET      4.0     2.5    -      -       -      +
    181C  SER*     1.3    73.0    -      -       -      +
    183C  LEU*     1.3    61.4    +      -       -      +
    185C  GLY*     4.3     1.8    -      -       -      +
    186C  GLU*     2.8    28.6    +      -       +      +
    398C  PHE*     4.4     4.7    -      -       +      -
    402C  LYS*     3.4    36.1    -      -       +      -
    408C  ASN*     3.6    26.5    -      -       -      +
    411C  LEU*     4.2     9.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 183 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    179C  MET      3.0    18.8    +      -       -      +
    180C  LYS*     3.6     4.3    -      -       -      +
    182C  VAL*     1.3    74.9    -      -       -      +
    184C  ILE*     1.3    66.0    +      -       -      +
    186C  GLU*     3.1    11.7    +      -       -      +
    187C  PHE*     3.2    40.2    +      -       +      -
    284C  GLN*     4.0    28.3    -      -       -      +
    315C  ILE*     4.2    11.0    -      -       +      -
    316C  GLY      4.1    23.8    -      -       -      +
    317C  THR*     4.5     7.2    -      -       +      -
    391C  TYR*     3.4    28.9    -      -       +      +
    398C  PHE*     4.0    16.0    -      -       +      -
    469C  VAL*     4.6     7.6    -      -       +      -
    470C  PHE      4.8     3.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 184 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    180C  LYS*     2.8    26.0    +      -       +      +
    181C  SER*     3.9     3.8    -      -       -      +
    183C  LEU*     1.3    73.8    -      -       +      +
    185C  GLY*     1.3    58.0    +      -       -      +
    187C  PHE*     3.4     1.0    +      -       -      +
    188C  LEU*     2.9    40.3    +      -       +      +
    211C  ASP*     4.2    14.1    -      -       -      +
    214C  LYS*     4.1    30.3    -      -       +      +
    215C  TRP*     3.5    55.6    -      -       +      +
    280C  ILE*     5.1     0.9    -      -       -      +
    282C  SER*     4.4     5.2    -      -       -      +
    284C  GLN*     4.8     4.7    -      -       -      +
    315C  ILE*     4.2    17.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 185 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    181C  SER      2.7    23.5    +      -       -      -
    182C  VAL*     3.7     2.9    -      -       -      -
    184C  ILE*     1.3    75.2    -      -       -      +
    186C  GLU*     1.3    61.0    +      -       -      +
    188C  LEU*     3.6     6.5    +      -       -      +
    189C  GLU*     3.4    22.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 186 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    182C  VAL*     2.8    17.8    +      -       +      +
    183C  LEU      3.1     5.6    +      -       -      +
    185C  GLY*     1.3    77.3    -      -       -      +
    187C  PHE*     1.3    63.0    +      -       +      +
    189C  GLU*     3.6     6.5    +      -       -      +
    190C  LYS*     3.3    48.3    +      -       +      +
    391C  TYR*     2.8    41.0    +      -       -      -
    398C  PHE*     4.1     2.8    -      -       -      -
    402C  LYS*     3.7    26.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 187 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    183C  LEU*     3.2    31.7    +      -       +      +
    184C  ILE      4.4     1.1    -      -       -      +
    186C  GLU*     1.3    84.4    -      -       -      +
    188C  LEU*     1.3    66.0    +      -       -      +
    189C  GLU      3.1     1.3    -      -       -      -
    190C  LYS*     3.7    23.8    -      -       +      +
    191C  VAL*     3.0    28.9    +      -       -      +
    280C  ILE*     3.9    13.7    -      -       +      -
    313C  TYR*     3.7    35.6    -      +       +      -
    315C  ILE*     3.9    17.7    -      -       +      -
    390C  VAL*     4.2     8.5    -      -       +      -
    391C  TYR*     3.3    36.8    -      +       -      -
    471C  ALA*     3.3    29.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 188 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    184C  ILE*     2.9    36.2    +      -       +      +
    185C  GLY*     4.0     6.5    -      -       -      +
    187C  PHE*     1.3    76.6    -      -       -      +
    189C  GLU*     1.3    58.3    +      -       -      +
    191C  VAL*     3.5     3.8    +      -       +      +
    192C  ARG*     3.1    42.7    +      -       -      +
    199C  ILE*     3.8    17.9    -      -       +      -
    214C  LYS      4.7     1.1    -      -       -      +
    215C  TRP*     3.9    20.9    -      -       +      -
    218C  GLY*     3.5    31.2    -      -       -      -
    220C  ILE*     3.6    23.1    -      -       +      -
    280C  ILE*     4.0     9.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 189 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    185C  GLY      3.4    14.3    +      -       -      +
    186C  GLU*     3.8     6.7    -      -       -      +
    187C  PHE      3.1     0.6    -      -       -      -
    188C  LEU*     1.3    79.6    -      -       -      +
    190C  LYS*     1.3    60.2    +      -       +      +
    192C  ARG*     3.2    10.0    +      -       +      +
    193C  GLN*     2.9    28.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 190 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    186C  GLU*     3.3    39.8    +      -       -      +
    187C  PHE*     3.4    32.7    +      -       +      +
    189C  GLU*     1.3    79.1    -      -       +      +
    191C  VAL*     1.3    63.8    +      -       -      +
    193C  GLN*     3.3    16.1    +      -       -      +
    194C  LYS*     3.5    12.5    +      -       -      +
    313C  TYR*     4.0    25.1    +      -       +      +
    390C  VAL*     5.4     5.6    -      -       +      -
    391C  TYR*     5.7     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 191 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    187C  PHE      3.0    21.5    +      -       -      +
    188C  LEU*     3.5     5.8    -      -       -      +
    190C  LYS*     1.3    76.5    -      -       -      +
    192C  ARG*     1.3    58.0    +      -       -      +
    194C  LYS*     3.0    24.5    +      -       -      +
    195C  LYS*     2.8    29.8    +      -       +      +
    199C  ILE*     3.6    29.6    -      -       +      -
    279C  ASP*     4.0    23.1    -      -       +      +
    280C  ILE*     3.8    24.7    -      -       +      -
    313C  TYR*     3.9    16.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 192 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    188C  LEU*     3.1    37.2    +      -       -      +
    189C  GLU*     3.2    10.2    +      -       +      +
    191C  VAL*     1.3    75.4    -      -       -      +
    193C  GLN*     1.3    62.1    +      -       -      +
    194C  LYS      3.4     0.3    +      -       -      -
    195C  LYS      4.2     0.7    -      -       -      -
    196C  LYS*     3.6    31.7    +      -       -      +
    197C  ARG      5.5     0.6    +      -       -      +
    199C  ILE*     3.8    32.0    -      -       +      +
    218C  GLY*     2.6    24.7    +      -       -      -
    219C  ARG*     2.7    36.0    +      -       -      +
    220C  ILE*     3.9     0.8    -      -       -      +
    221C  ASN*     5.4     0.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 193 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    189C  GLU*     2.9    13.9    +      -       +      +
    190C  LYS*     3.6    13.0    -      -       -      +
    191C  VAL      3.2     0.2    -      -       -      -
    192C  ARG*     1.3    76.9    -      -       -      +
    194C  LYS*     1.3    60.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 194 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    190C  LYS      3.5     6.1    +      -       -      +
    191C  VAL*     3.0    37.1    +      -       -      +
    192C  ARG      4.2     0.7    -      -       -      -
    193C  GLN*     1.3    81.0    -      -       -      +
    195C  LYS*     1.3    83.0    +      -       +      +
    196C  LYS*     4.8     1.8    -      -       -      +
    279C  ASP*     4.1    13.7    +      -       -      +
    309C  SER*     5.8     2.3    -      -       -      -
    310C  PRO      4.0    10.8    -      -       -      -
    311C  GLY*     3.7    36.0    +      -       -      +
    312C  GLY*     4.3     4.4    -      -       -      +
    313C  TYR*     5.5     2.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 195 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    191C  VAL*     2.8    22.4    +      -       +      +
    194C  LYS*     1.3    84.4    -      -       +      +
    196C  LYS*     1.3    71.4    +      -       -      +
    197C  ARG*     3.2    61.0    -      -       +      +
    198C  ASP*     2.6    29.0    +      -       -      +
    199C  ILE*     4.6     3.1    -      -       +      -
    200C  THR*     4.7     3.0    +      -       -      +
    279C  ASP*     2.8    34.3    +      -       -      +
    309C  SER*     5.7     1.9    +      -       -      -
----------------------------------------------------------
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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