Contacts of the helix formed by residues 150 - 176 (chain O) in PDB entry 2FJC


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 150 (chain O).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     32O  ILE*     6.1     0.7    -      -       -      +
     35O  ILE*     3.7    26.3    -      -       +      +
     89O  ARG*     2.8    27.1    +      -       -      -
     93O  LEU*     4.0    13.6    -      -       -      +
    145O  ALA*     2.8    15.6    +      -       +      +
    146O  ALA*     5.7     0.2    -      -       -      -
    148O  SER*     3.3     5.1    +      -       -      +
    149O  GLY*     1.3    73.0    -      -       -      +
    151O  ALA*     1.3    59.7    +      -       -      +
    152O  VAL      3.6     1.4    +      -       -      -
    153O  THR*     2.7    30.1    +      -       -      -
    154O  ASP*     3.0    19.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 151 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    149O  GLY      2.8    14.1    +      -       -      +
    150O  ASP*     1.3    71.8    -      -       -      +
    152O  VAL*     1.3    64.7    +      -       +      +
    154O  ASP*     3.2     9.4    +      -       -      +
    155O  GLY*     2.9    21.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 152 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     89O  ARG*     3.5    37.7    -      -       -      +
     92O  GLN*     4.7     3.4    -      -       -      +
    150O  ASP*     3.3     1.4    +      -       -      -
    151O  ALA*     1.3    77.9    -      -       +      +
    153O  THR*     1.3    64.7    +      -       -      +
    155O  GLY*     3.2     3.3    +      -       -      -
    156O  ILE*     2.9    36.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 153 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     35O  ILE*     4.0    20.0    -      -       +      -
     39O  LEU*     4.2     8.5    -      -       +      -
     89O  ARG*     2.9    28.1    +      -       +      +
     93O  LEU*     4.1     3.8    -      -       -      +
    141O  THR*     4.4     3.4    -      -       +      -
    145O  ALA*     4.0    10.5    -      -       +      -
    150O  ASP*     2.7    33.3    +      -       -      -
    152O  VAL*     1.3    76.0    -      -       -      +
    154O  ASP*     1.3    63.4    +      -       -      +
    156O  ILE*     3.2     4.6    +      -       -      +
    157O  ILE*     2.9    42.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 154 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    142O  GLN*     2.8    26.5    -      -       -      +
    145O  ALA*     3.7    11.4    -      -       +      +
    146O  ALA*     3.4    26.8    -      -       -      +
    150O  ASP      3.0    15.0    +      -       -      +
    151O  ALA*     3.3    15.1    -      -       -      +
    153O  THR*     1.3    76.9    -      -       -      +
    155O  GLY*     1.3    58.9    +      -       -      +
    157O  ILE*     3.4     3.8    +      -       -      +
    158O  THR*     2.8    40.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 155 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    151O  ALA      2.9    14.0    +      -       -      -
    152O  VAL      3.7     2.7    -      -       -      -
    154O  ASP*     1.3    76.9    -      -       -      +
    156O  ILE*     1.3    63.4    +      -       -      +
    158O  THR*     3.8     4.8    -      -       -      -
    159O  ASP*     3.0    34.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 156 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     85O  THR*     4.1    29.6    -      -       -      +
     86O  ILE*     4.4     7.2    -      -       +      -
     89O  ARG*     3.8    38.8    -      -       +      -
     92O  GLN*     5.5     2.0    -      -       -      +
    152O  VAL*     2.9    26.4    +      -       +      +
    153O  THR*     3.2     4.9    +      -       -      +
    155O  GLY*     1.3    79.2    -      -       -      +
    157O  ILE*     1.3    72.4    +      -       +      +
    159O  ASP*     3.3     8.1    +      -       -      +
    160O  ILE*     3.3    27.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 157 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     39O  LEU*     4.1    15.3    -      -       +      -
     42O  HIS*     4.8     0.4    -      -       +      -
     86O  ILE*     4.8     7.4    -      -       +      -
     89O  ARG*     6.0     0.7    -      -       +      -
    138O  PHE*     3.3    46.7    -      -       +      +
    141O  THR*     4.0    13.2    -      -       +      -
    142O  GLN*     3.6    19.1    -      -       +      +
    153O  THR*     2.9    39.8    +      -       +      +
    154O  ASP      4.0     1.8    -      -       -      +
    156O  ILE*     1.3    88.4    -      -       +      +
    158O  THR*     1.3    60.3    +      -       -      +
    160O  ILE*     3.1     9.0    +      -       -      +
    161O  LEU*     2.7    34.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 158 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    151M  ALA*     3.6    42.5    -      -       +      +
    152M  VAL*     4.1     5.6    -      -       +      +
    155M  GLY*     5.0     8.7    -      -       -      -
    142O  GLN*     3.8     3.5    +      -       -      +
    154O  ASP*     2.8    37.7    +      -       -      -
    155O  GLY*     3.9     5.8    -      -       -      -
    157O  ILE*     1.3    77.8    -      -       -      +
    159O  ASP*     1.3    59.2    +      -       -      +
    161O  LEU*     3.1     9.5    +      -       -      +
    162O  ARG*     2.8    32.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 159 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    155O  GLY*     3.0    25.0    +      -       -      +
    156O  ILE*     3.6     8.5    -      -       -      +
    157O  ILE      3.2     0.2    -      -       -      -
    158O  THR*     1.3    77.6    -      -       -      +
    160O  ILE*     1.3    64.3    +      -       +      +
    162O  ARG*     3.2    30.7    +      -       -      +
    163O  THR*     3.2    18.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 160 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     82O  ALA*     3.7    30.7    -      -       +      -
     85O  THR*     4.3     2.9    -      -       -      +
     86O  ILE*     3.5    37.0    -      -       +      -
    138O  PHE*     3.8    30.7    -      -       +      -
    156O  ILE*     3.4    21.5    -      -       +      +
    157O  ILE*     3.1     9.3    +      -       -      +
    159O  ASP*     1.3    74.9    -      -       +      +
    161O  LEU*     1.3    67.1    +      -       -      +
    163O  THR*     3.1    13.0    +      -       -      +
    164O  LEU*     2.9    28.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 161 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    151M  ALA*     4.9     5.8    -      -       +      -
    152M  VAL*     3.8    19.0    -      -       +      +
    135O  SER*     3.6    29.9    +      -       -      +
    138O  PHE*     3.4    29.2    -      -       +      -
    139O  SER*     4.0    22.0    -      -       -      +
    142O  GLN*     4.1    13.0    -      -       +      -
    157O  ILE*     2.7    34.0    +      -       +      +
    158O  THR*     3.3    13.2    -      -       -      +
    160O  ILE*     1.3    73.9    -      -       -      +
    162O  ARG*     1.3    59.3    +      -       -      +
    164O  LEU*     3.7     4.5    -      -       +      +
    165O  GLY*     2.9    25.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 162 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     92M  GLN*     5.0     3.0    +      -       -      +
    152M  VAL*     3.8    25.9    +      -       +      +
    155M  GLY*     3.3    26.5    +      -       -      -
    156M  ILE*     3.9    28.8    -      -       +      +
    159M  ASP*     3.1    30.1    +      -       -      +
    158O  THR*     2.8    16.7    +      -       -      +
    159O  ASP*     3.4    24.8    +      -       -      +
    160O  ILE      3.1     0.2    -      -       -      -
    161O  LEU*     1.3    77.4    -      -       -      +
    163O  THR*     1.3    64.8    +      -       +      +
    165O  GLY*     3.3     2.4    +      -       -      -
    166O  LYS*     3.2    21.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 163 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     78O  SER*     4.5    14.8    +      -       -      +
    159O  ASP*     3.5    13.7    -      -       +      +
    160O  ILE*     3.1    18.3    +      -       -      +
    162O  ARG*     1.3    78.1    -      -       +      +
    164O  LEU*     1.3    64.4    +      -       -      +
    166O  LYS*     3.4     8.4    +      -       -      +
    167O  ALA*     3.1    23.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 164 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    131O  PHE*     3.8    46.0    -      -       +      +
    134O  LEU*     4.1     6.7    -      -       +      -
    135O  SER*     3.9    22.7    -      -       -      +
    138O  PHE*     3.5    37.0    -      -       +      -
    160O  ILE*     2.9    25.4    +      -       +      +
    161O  LEU*     3.7     7.6    -      -       +      +
    163O  THR*     1.3    76.3    +      -       -      +
    165O  GLY*     1.3    60.6    +      -       -      +
    167O  ALA*     3.2     3.6    +      -       -      +
    168O  ILE*     2.8    41.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 165 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     89M  ARG*     5.2     3.8    -      -       -      -
     92M  GLN*     3.9    17.6    -      -       -      +
    152M  VAL*     6.0     0.7    -      -       -      -
    135O  SER*     5.7     1.3    +      -       -      -
    161O  LEU      2.9    16.7    +      -       -      -
    162O  ARG*     3.3     2.8    +      -       -      -
    164O  LEU*     1.3    77.4    -      -       -      +
    166O  LYS*     1.3    60.4    +      -       -      +
    168O  ILE*     3.5     9.6    +      -       -      +
    169O  TRP*     3.0    24.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 166 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     88M  GLU*     3.0    27.7    +      -       -      +
     92M  GLN*     3.7    18.2    +      -       -      +
     69N  HIS*     5.9     1.5    +      -       -      -
    162O  ARG*     3.2    13.4    +      -       +      +
    163O  THR*     3.7    11.0    -      -       -      +
    164O  LEU      3.2     0.4    -      -       -      -
    165O  GLY*     1.3    75.7    -      -       -      +
    167O  ALA*     1.3    58.1    +      -       -      +
    169O  TRP*     3.3     9.9    +      -       +      +
    170O  MET*     3.0    60.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 167 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     75O  TYR*     4.0    19.0    +      -       +      -
    131O  PHE*     3.7    26.7    -      -       +      -
    163O  THR      3.1    17.1    +      -       -      +
    164O  LEU*     3.7     4.9    -      -       +      +
    166O  LYS*     1.3    74.9    -      -       -      +
    168O  ILE*     1.3    59.9    -      -       -      +
    170O  MET*     3.3     9.0    +      -       -      +
    171O  LEU*     2.8    36.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 168 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128O  LYS*     3.7    13.0    -      -       +      +
    131O  PHE*     3.7    43.1    -      -       +      +
    132O  GLU*     3.8    34.5    -      -       +      +
    135O  SER*     4.0    14.6    -      -       -      +
    164O  LEU      2.8    29.3    +      -       -      +
    165O  GLY*     3.8     7.0    -      -       -      +
    167O  ALA*     1.3    71.9    -      -       -      +
    169O  TRP*     1.3    59.5    +      -       -      +
    171O  LEU*     3.7     7.0    -      -       -      +
    172O  GLY*     2.9    25.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with TRP 169 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     88M  GLU*     3.9    24.0    -      -       +      -
     91M  LEU*     3.4    51.7    -      -       +      +
     92M  GLN*     3.6    26.5    -      -       +      -
     58N  TRP      4.0     8.6    +      -       -      -
     65N  PHE*     3.8    18.6    -      +       -      -
     69N  HIS*     3.7    28.0    -      +       -      -
    165O  GLY      3.0    18.7    +      -       -      +
    166O  LYS*     3.8    11.7    -      -       +      -
    167O  ALA      3.2     0.2    -      -       -      -
    168O  ILE*     1.3    79.3    -      -       -      +
    170O  MET*     1.3    91.3    +      -       +      +
    172O  GLY*     3.2     2.7    +      -       -      -
    173O  ALA*     3.0    25.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with MET 170 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65N  PHE*     3.8    25.7    -      -       +      -
     66N  LYS*     5.1    20.2    -      -       +      -
     69N  HIS*     4.8    11.7    -      -       -      +
     75O  TYR*     5.2     4.5    -      -       -      +
    166O  LYS*     3.0    59.3    +      -       +      +
    167O  ALA*     3.8     8.1    -      -       -      +
    169O  TRP*     1.3    92.5    -      -       +      +
    171O  LEU*     1.3    60.5    +      -       +      +
    173O  ALA*     3.1     3.1    +      -       -      +
    174O  THR*     2.7    36.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 171 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     71O  LEU*     4.5     5.6    -      -       +      -
     75O  TYR*     3.4    21.3    -      -       +      +
    124O  LEU*     3.9    41.1    -      -       +      +
    127O  VAL*     3.4    27.4    -      -       +      -
    128O  LYS*     3.7    29.2    -      -       +      -
    131O  PHE*     3.8    13.0    -      -       +      -
    167O  ALA      2.8    20.8    +      -       -      +
    168O  ILE*     3.7     4.3    -      -       -      +
    170O  MET*     1.3    74.8    -      -       -      +
    172O  GLY*     1.3    63.6    +      -       -      +
    174O  THR*     3.2     6.8    +      -       +      +
    175O  LEU*     2.9    29.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 172 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128O  LYS*     3.5    22.8    -      -       -      +
    168O  ILE      2.9    12.0    +      -       -      -
    169O  TRP*     3.2     4.0    +      -       -      -
    170O  MET      3.2     0.2    -      -       -      -
    171O  LEU*     1.3    77.6    -      -       -      +
    173O  ALA*     1.3    56.3    +      -       -      +
    175O  LEU*     3.7     2.7    -      -       -      +
    176O  LYS*     2.9    31.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 173 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     60N  ILE      4.5     5.2    -      -       -      +
     61N  TYR*     3.5     9.3    -      -       +      +
     62N  GLY      3.0    22.4    +      -       -      -
     65N  PHE*     3.8    33.0    -      -       +      -
    169O  TRP*     3.0    21.7    +      -       +      +
    170O  MET*     3.1     9.2    +      -       -      +
    172O  GLY*     1.3    78.4    -      -       -      +
    174O  THR*     1.3    59.5    +      -       -      +
    176O  LYS*     3.7     9.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with THR 174 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     62N  GLY*     3.1    29.8    -      -       -      -
     63N  ILE*     3.3    23.5    +      -       -      +
     65N  PHE*     3.7    18.8    -      -       +      -
     66N  LYS*     4.7     7.2    -      -       +      +
     71O  LEU*     6.2     3.4    -      -       +      -
    121O  VAL*     6.1     0.2    -      -       -      +
    124O  LEU*     3.8    23.5    -      -       +      +
    170O  MET*     2.7    31.1    +      -       +      +
    171O  LEU*     3.2    10.6    +      -       +      +
    173O  ALA*     1.3    75.2    -      -       -      +
    175O  LEU*     1.3    62.7    +      -       -      +
    176O  LYS      3.8     0.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 175 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63N  ILE*     6.1     0.7    -      -       +      -
    121O  VAL*     3.7    42.0    -      -       +      +
    124O  LEU*     3.8    19.1    -      -       +      +
    125O  ALA*     3.4    35.4    -      -       +      +
    128O  LYS*     4.3    15.0    -      -       +      -
    171O  LEU*     2.9    20.3    +      -       +      +
    172O  GLY*     3.7     3.8    -      -       -      +
    174O  THR*     1.3    84.2    -      -       -      +
    176O  LYS*     1.3    66.2    +      -       -      +
    177O  ALA*     3.4     5.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 176 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     59N  HIS      5.8     0.2    +      -       -      -
     61N  TYR*     3.7    40.2    -      -       +      +
     62N  GLY*     4.3    10.0    -      -       -      -
    117N  GLU*     2.8    45.6    +      -       -      +
    172O  GLY      2.9    17.0    +      -       -      +
    173O  ALA*     3.7    11.4    -      -       -      +
    174O  THR      3.4     1.5    -      -       -      +
    175O  LEU*     1.3    78.8    -      -       -      +
    177O  ALA*     1.3    70.8    +      -       -      +
----------------------------------------------------------
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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