Contacts of the helix formed by residues 141 - 164 (chain C) in PDB entry 1F33


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 141 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133B  ARG*     4.2    12.3    -      -       -      +
     21C  VAL*     4.7     9.4    -      -       +      +
     25C  GLU*     3.4     9.3    +      -       -      +
     29C  THR*     3.9    17.4    +      -       -      +
     83C  ARG*     2.8    34.8    +      -       -      -
     87C  LEU*     4.3     5.9    -      -       +      +
    139C  ALA*     3.5     1.2    -      -       -      +
    140C  LYS*     1.3    76.7    -      -       -      +
    142C  ASP*     1.3    68.7    +      -       -      +
    143C  ASP      3.9     2.1    +      -       -      -
    144C  THR*     2.4    35.3    +      -       -      +
    145C  ALA*     2.9    21.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 142 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133B  ARG*     4.3     8.2    -      -       +      +
    136B  ILE*     3.7    43.5    -      -       +      +
    137B  GLY*     4.3     9.0    +      -       -      -
    149B  THR*     4.3     5.0    -      -       +      +
    140C  LYS      3.3     8.4    +      -       -      +
    141C  ASP*     1.3    72.9    +      -       -      +
    143C  ASP*     1.3    66.2    +      -       -      +
    145C  ALA*     3.0    10.8    +      -       -      +
    146C  ASP*     2.9    21.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 143 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133B  ARG*     4.0     3.5    -      -       -      -
    136B  ILE*     3.5    10.8    -      -       -      +
    149B  THR*     3.5    16.1    -      -       -      +
    152B  SER*     2.6    37.9    +      -       -      -
    153B  ARG*     3.7    20.0    +      -       -      +
    156B  ASP*     3.3     7.6    -      -       -      +
     83C  ARG*     3.3    36.2    +      -       -      +
    141C  ASP*     3.3     2.5    +      -       -      -
    142C  ASP*     1.3    77.4    -      -       -      +
    144C  THR*     1.3    62.1    +      -       -      +
    146C  ASP*     3.1     4.3    +      -       -      +
    147C  ILE*     3.0    28.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 144 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29C  THR*     3.1    23.6    -      -       +      +
     32C  LEU*     5.1     4.5    -      -       +      -
     33C  LEU*     3.5    31.0    -      -       +      -
     83C  ARG*     3.6     8.0    +      -       -      +
    139C  ALA*     4.4     7.6    -      -       +      -
    141C  ASP*     2.4    36.1    +      -       -      -
    143C  ASP*     1.3    72.7    -      -       -      +
    145C  ALA*     1.3    67.3    +      -       -      +
    147C  ILE*     3.2    10.3    +      -       -      +
    148C  LEU*     2.9    35.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 145 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    136C  ILE*     4.0    23.7    -      -       +      +
    139C  ALA*     3.9    17.0    -      -       +      +
    141C  ASP      2.9    12.4    +      -       -      +
    142C  ASP*     3.0    12.1    +      -       -      +
    144C  THR*     1.3    76.4    -      -       -      +
    146C  ASP*     1.3    54.6    +      -       -      +
    148C  LEU*     3.3     5.5    +      -       -      +
    149C  THR*     2.6    38.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 146 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    149B  THR*     3.7    26.8    -      -       +      +
    150B  ALA      5.2     0.5    +      -       -      -
    153B  ARG*     2.9    24.1    +      -       -      +
    142C  ASP      2.9     6.2    +      -       -      +
    143C  ASP      3.3     9.4    -      -       -      +
    144C  THR      3.1     0.2    -      -       -      -
    145C  ALA*     1.3    77.5    -      -       -      +
    147C  ILE*     1.3    64.9    +      -       -      +
    149C  THR*     2.9    18.8    +      -       -      -
    150C  ALA*     2.9    13.7    +      -       -      +
    603C  TRS      2.6    53.1    +      -       -      -
    146E  ASP*     4.3     1.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 147 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    153B  ARG*     3.4    35.4    -      -       +      +
     33C  LEU*     5.2     1.8    -      -       +      -
     76C  HIS*     4.8     3.2    +      -       -      +
     79C  THR*     3.8    24.5    -      -       +      -
     80C  MET*     3.6    30.5    -      -       +      -
     83C  ARG*     3.7    41.1    -      -       +      -
    143C  ASP      3.0    17.2    +      -       -      +
    144C  THR*     3.5     9.0    -      -       +      +
    146C  ASP*     1.3    75.8    -      -       -      +
    148C  LEU*     1.3    64.0    +      -       +      +
    150C  ALA*     3.3     5.5    +      -       -      +
    151C  ALA*     3.1    20.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 148 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     32C  LEU*     4.3     7.4    -      -       +      -
     33C  LEU*     4.6     6.7    -      -       +      -
     36C  GLN*     4.0    10.5    -      -       +      -
     80C  MET*     3.8    28.5    -      -       +      -
    132C  VAL*     3.9    19.4    -      -       +      +
    135C  ALA*     3.8    32.8    -      -       +      +
    136C  ILE*     3.9    13.7    -      -       +      +
    139C  ALA*     4.1     7.4    -      -       +      -
    144C  THR*     2.9    35.8    +      -       +      +
    145C  ALA      3.7     3.8    -      -       -      +
    147C  ILE*     1.3    72.8    -      -       +      +
    149C  THR*     1.3    56.3    +      -       -      +
    151C  ALA*     3.7     3.1    -      -       -      +
    152C  SER*     2.7    36.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with THR 149 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    136C  ILE*     3.4    24.7    -      -       +      +
    145C  ALA      2.6    21.5    +      -       -      -
    146C  ASP*     2.9    11.7    +      -       -      -
    148C  LEU*     1.3    74.5    -      -       -      +
    150C  ALA*     1.3    61.0    +      -       -      +
    153C  ARG*     2.8    33.1    +      -       -      +
    142E  ASP*     4.2     5.0    -      -       +      +
    143E  ASP*     3.3    23.2    -      -       -      +
    146E  ASP*     3.7    36.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 150 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    153B  ARG*     4.8    10.8    -      -       -      +
     76C  HIS*     3.4    21.0    -      -       +      +
    146C  ASP      2.9    11.0    +      -       -      +
    147C  ILE*     3.5    10.8    -      -       -      +
    149C  THR*     1.3    79.1    -      -       -      +
    151C  ALA*     1.3    61.5    +      -       -      +
    153C  ARG*     3.4     8.9    -      -       -      +
    154C  ASP*     3.4    15.2    +      -       -      +
    603C  TRS      4.4    19.0    +      -       -      +
    146E  ASP*     5.3     0.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 151 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     40C  PHE*     3.9    22.9    -      -       +      -
     76C  HIS*     3.4    31.4    -      -       +      +
     80C  MET*     5.0     5.8    -      -       -      -
    132C  VAL*     4.6     2.7    -      -       +      -
    147C  ILE*     3.1    15.2    +      -       +      +
    148C  LEU*     3.7     7.0    -      -       -      +
    150C  ALA*     1.3    75.4    -      -       -      +
    152C  SER*     1.3    66.6    +      -       -      +
    154C  ASP*     3.1     4.2    +      -       -      +
    155C  LEU*     2.9    29.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 152 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132C  VAL*     4.0    20.1    -      -       -      +
    133C  ARG*     3.6    21.4    +      -       -      +
    136C  ILE*     3.7     9.2    -      -       -      -
    148C  LEU      2.7    22.5    +      -       -      -
    149C  THR      3.6     0.2    -      -       -      -
    151C  ALA*     1.3    71.1    -      -       -      +
    153C  ARG*     1.3    65.4    +      -       -      +
    154C  ASP      3.1     0.2    +      -       -      -
    155C  LEU*     3.1     1.7    +      -       -      -
    156C  ASP*     2.9    29.2    +      -       -      +
    143E  ASP*     2.6    32.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 153 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    149C  THR      2.8    16.6    +      -       -      +
    150C  ALA*     3.4     8.9    -      -       -      +
    152C  SER*     1.3    78.3    -      -       -      +
    154C  ASP*     1.3    62.3    +      -       -      +
    156C  ASP*     3.8     4.1    +      -       -      +
    157C  LYS*     3.4    19.2    +      -       -      +
    603C  TRS      4.1    14.3    +      -       -      -
     79E  THR*     3.6    18.8    -      -       -      +
     83E  ARG*     5.2     2.9    -      -       -      +
     86E  GLN*     4.3     4.0    +      -       -      +
    143E  ASP*     3.7    26.9    +      -       +      +
    146E  ASP*     3.0    27.6    +      -       -      -
    147E  ILE*     3.5    44.1    -      -       +      +
    150E  ALA*     4.9     7.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 154 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     72C  ALA*     4.2     8.4    -      -       -      +
     76C  HIS*     2.6    37.0    +      -       +      +
    150C  ALA      3.4     3.9    +      -       -      -
    151C  ALA      3.1     4.7    +      -       -      +
    153C  ARG*     1.3    79.8    -      -       -      +
    155C  LEU*     1.3    61.8    +      -       +      +
    157C  LYS*     2.9    12.7    +      -       -      +
    158C  PHE*     2.8    58.6    +      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 155 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     40C  PHE*     3.2    37.5    -      -       +      -
     43C  LEU*     3.8    20.4    -      -       +      -
     73C  LEU*     4.2    14.8    -      -       +      -
     76C  HIS*     5.4     1.1    -      -       +      -
    125C  TYR*     4.2    10.2    -      -       +      +
    128C  VAL*     3.5    30.3    -      -       +      -
    129C  ALA*     3.9    22.0    -      -       +      +
    132C  VAL*     4.7     2.5    -      -       +      -
    151C  ALA*     2.9    26.1    +      -       -      +
    152C  SER*     3.8     5.4    -      -       -      +
    154C  ASP*     1.3    78.9    -      -       +      +
    156C  ASP*     1.3    57.4    +      -       -      +
    158C  PHE*     3.2     7.0    +      -       +      +
    159C  LEU*     2.8    31.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 156 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    129C  ALA*     3.7    11.6    -      -       -      +
    133C  ARG*     2.6    33.6    +      -       -      -
    152C  SER*     2.9    18.7    +      -       -      +
    153C  ARG      4.1     1.6    -      -       -      +
    155C  LEU*     1.3    76.2    -      -       -      +
    157C  LYS*     1.3    61.2    +      -       -      +
    159C  LEU*     3.8     6.4    -      -       -      +
    160C  TRP*     3.1    23.0    +      -       -      +
     19E  ASN*     3.3    18.0    +      -       -      +
     83E  ARG*     2.7    40.0    +      -       -      +
     86E  GLN*     3.7    10.5    -      -       +      +
    143E  ASP*     3.5     4.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 157 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    153C  ARG      3.4    12.0    +      -       -      +
    154C  ASP*     2.9    17.3    +      -       -      +
    156C  ASP*     1.3    77.1    -      -       -      +
    158C  PHE*     1.3    74.7    +      -       +      +
    160C  TRP*     3.3    11.5    +      -       +      +
    161C  PHE*     2.9    55.9    +      -       +      +
     82E  GLU*     4.0    20.2    +      -       -      +
     86E  GLN*     3.8    23.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 158 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     68C  GLY      5.3     0.4    -      -       -      -
     69C  PHE*     3.3    53.1    -      +       +      -
     72C  ALA*     3.6    32.5    -      -       +      -
     73C  LEU*     4.1    12.8    -      -       +      -
     76C  HIS*     5.7     0.4    -      +       -      -
    125C  TYR*     3.7    24.5    -      +       +      -
    154C  ASP*     2.8    45.9    +      -       +      +
    155C  LEU*     3.7     7.4    -      -       -      +
    157C  LYS*     1.3    89.5    -      -       +      +
    159C  LEU*     1.3    66.0    +      -       -      +
    161C  PHE*     2.9     3.7    +      +       -      +
    162C  ILE*     2.7    29.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 159 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    122C  ALA*     3.5    31.0    -      -       -      +
    125C  TYR*     4.2    10.4    -      -       +      -
    126C  ALA*     3.9    22.2    -      -       +      +
    129C  ALA*     4.4    10.1    -      -       +      -
    155C  LEU      2.8    20.5    +      -       -      +
    156C  ASP*     3.8     5.8    -      -       -      +
    158C  PHE*     1.3    73.2    -      -       -      +
    160C  TRP*     1.3    59.2    +      -       -      +
    162C  ILE*     3.1     4.5    +      -       -      +
    163C  GLU*     2.8    58.1    +      -       +      +
     17E  THR*     4.4     1.3    -      -       -      +
     18E  ARG*     4.1     1.3    -      -       +      -
     19E  ASN*     3.7    40.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with TRP 160 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    156C  ASP      3.1    11.4    +      -       -      +
    157C  LYS*     3.3    11.2    -      -       +      +
    159C  LEU*     1.3    80.4    -      -       -      +
    161C  PHE*     1.3    85.8    +      +       -      +
    163C  GLU*     3.5     8.9    +      -       -      +
    164C  SER*     2.7    65.7    +      -       -      -
     17E  THR*     5.7     1.3    -      -       -      -
     82E  GLU*     3.9    30.7    -      -       +      -
     85E  VAL*     3.3    38.0    -      -       +      +
     86E  GLN*     3.6    40.6    -      -       +      +
     52F  TRP*     3.9    13.2    +      -       -      -
     54F  MET      5.2     1.4    +      -       -      -
     55F  ARG*     4.1    15.0    -      -       -      +
     59F  PHE*     4.2    14.9    -      +       -      -
     63F  HIS*     4.0    13.7    -      +       -      -
----------------------------------------------------------
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Residues in contact with PHE 161 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65C  MET*     4.0     5.8    -      -       +      -
     69C  PHE*     3.7    30.1    -      +       +      -
    157C  LYS*     2.9    37.6    +      -       +      +
    158C  PHE      2.9     7.4    +      -       -      +
    160C  TRP*     1.3   112.2    -      +       -      +
    162C  ILE*     1.3    65.0    +      -       -      +
    164C  SER*     3.5     2.4    +      -       -      -
    165C  ASN*     2.8    30.6    +      -       -      -
     82E  GLU*     5.7     0.9    -      -       -      -
     59F  PHE*     3.7    13.6    -      +       -      -
     60F  ILE*     3.5    30.7    -      -       +      -
     63F  HIS*     3.9    20.6    -      +       -      -
     64F  GLU*     4.9     4.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 162 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65C  MET*     4.4    10.3    -      -       +      -
     66C  LEU*     4.8     5.8    -      -       +      -
     69C  PHE*     3.7    15.7    -      -       +      -
    118C  LEU*     3.3    40.2    -      -       +      +
    121C  LEU*     4.1    10.3    -      -       +      -
    122C  ALA*     3.8    12.6    -      -       +      +
    125C  TYR*     3.5    54.1    -      -       +      -
    158C  PHE      2.7    18.5    +      -       -      +
    159C  LEU*     3.5     6.3    -      -       -      +
    161C  PHE*     1.3    72.0    -      -       -      +
    163C  GLU*     1.3    65.5    +      -       -      +
    165C  ASN*     2.9    18.8    +      -       -      +
    166C  ILE*     3.6     7.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 163 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    122C  ALA*     4.3     4.7    -      -       +      -
    159C  LEU*     2.8    35.1    +      -       +      +
    160C  TRP*     3.9     7.6    -      -       -      +
    162C  ILE*     1.3    73.2    -      -       -      +
    164C  SER*     1.3    57.3    +      -       -      +
    166C  ILE*     2.9    36.6    +      -       +      +
     16E  TYR*     4.2     4.2    -      -       -      +
     17E  THR*     2.8    30.6    +      -       -      -
     18E  ARG*     2.8    60.7    +      -       -      +
     55F  ARG*     4.7    12.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 164 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    160C  TRP*     2.7    47.6    +      -       -      -
    161C  PHE      3.9     0.7    -      -       -      -
    162C  ILE      3.1     0.4    +      -       -      -
    163C  GLU*     1.3    75.5    -      -       -      +
    165C  ASN*     1.3    56.5    +      -       -      +
    166C  ILE      3.4     0.2    -      -       -      -
     55F  ARG*     3.7    23.4    +      -       -      +
     56F  GLY      2.8    26.4    +      -       -      +
     59F  PHE*     3.0    41.2    -      -       -      +
----------------------------------------------------------
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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
------------------------------------------------------------
  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