Contacts of the helix formed by residues 147 - 171 (chain B) in PDB entry 1JS6


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 SER 147 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    352A  PRO*     3.7     9.4    -      -       -      +
    354A  GLY      5.3     2.9    -      -       -      -
    145B  GLN*     3.3     3.2    -      -       -      +
    146B  GLY*     1.3    79.4    -      -       -      +
    148B  ALA*     1.3    61.8    +      -       -      +
    149B  SER*     3.7     2.3    +      -       -      -
    150B  GLU*     2.8    34.6    +      -       -      +
    151B  ALA*     2.9    26.7    +      -       -      +
    302B  HIS*     4.0     3.1    -      -       -      -
    309B  PHE*     4.7     8.5    -      -       -      -
    312B  SER*     3.5    13.0    +      -       -      -
    602B  PLP      3.1    21.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 148 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    147B  SER*     1.3    72.3    -      -       -      +
    149B  SER*     1.3    58.0    +      -       -      +
    151B  ALA*     3.2     1.7    +      -       -      +
    152B  THR*     2.9    34.1    +      -       -      -
    194B  SER*     5.1     1.3    -      -       -      -
    271B  ASP*     4.7     3.1    -      -       -      +
    273B  ALA*     3.9     6.1    -      -       +      -
    298B  ASN*     3.4    22.6    -      -       -      +
    300B  ASN*     3.3    25.5    +      -       -      +
    312B  SER*     3.4     4.1    +      -       -      -
    602B  PLP      2.8    31.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 149 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    351A  LEU      5.3     2.7    -      -       -      -
    352A  PRO*     4.6     4.0    -      -       -      -
    353A  LEU*     3.1    29.8    -      -       -      +
    147B  SER*     3.1     5.5    -      -       -      -
    148B  ALA*     1.3    79.1    -      -       -      +
    150B  GLU*     1.3    61.8    +      -       -      +
    152B  THR*     3.7     2.5    +      -       -      -
    153B  LEU*     3.2    21.3    +      -       -      +
    194B  SER*     3.1    35.6    -      -       -      +
    197B  ARG*     5.8     1.1    -      -       -      -
    602B  PLP      2.9    23.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 150 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    150A  GLU*     4.4    13.2    -      -       -      +
    351A  LEU*     5.3     2.4    -      -       +      +
    352A  PRO*     3.3    33.8    -      -       +      +
    145B  GLN*     4.6    10.5    -      -       -      +
    146B  GLY*     3.3    15.6    +      -       -      +
    147B  SER*     2.8    37.7    +      -       -      +
    149B  SER*     1.3    74.6    -      -       -      +
    151B  ALA*     1.3    67.1    +      -       -      +
    153B  LEU*     3.1     7.8    +      -       +      +
    154B  VAL*     2.8    30.0    +      -       +      +
    309B  PHE*     6.0     0.2    -      -       -      -
    351B  LEU*     4.9    15.3    -      -       +      +
    352B  PRO*     5.1     9.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 151 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    145B  GLN*     4.1    13.3    -      -       +      +
    147B  SER      2.9    12.0    +      -       -      +
    148B  ALA      3.5     2.7    -      -       -      +
    150B  GLU*     1.3    77.1    -      -       -      +
    152B  THR*     1.3    63.2    +      -       -      +
    154B  VAL*     3.2     3.4    +      -       -      +
    155B  ALA*     3.0    23.0    +      -       -      +
    269B  HIS*     4.6     2.2    -      -       -      -
    298B  ASN*     3.3    40.4    -      -       +      +
    314B  MET*     3.8    23.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 152 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    148B  ALA      2.9    17.0    +      -       -      -
    149B  SER*     3.8     6.7    -      -       -      -
    151B  ALA*     1.3    76.3    -      -       -      +
    153B  LEU*     1.3    61.9    +      -       -      +
    155B  ALA*     3.2     4.3    +      -       -      +
    156B  LEU*     3.0    21.5    +      -       -      +
    194B  SER*     4.3     8.5    +      -       -      +
    195B  VAL*     4.4    19.0    -      -       +      +
    198B  ALA*     4.1    17.3    -      -       +      -
    238B  PHE*     4.0     3.9    -      -       +      -
    240B  VAL*     4.4    20.2    -      -       +      -
    269B  HIS*     3.6    23.5    +      -       +      -
    271B  ASP*     4.6    11.1    +      -       -      +
    298B  ASN*     5.2     0.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 153 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    153A  LEU*     6.1     1.1    -      -       +      -
    201A  ILE*     6.1     0.7    -      -       +      -
    351A  LEU*     5.0     9.4    -      -       +      +
    149B  SER      3.2    12.2    +      -       -      +
    150B  GLU*     3.1     9.7    +      -       +      +
    152B  THR*     1.3    78.6    -      -       -      +
    154B  VAL*     1.3    64.1    +      -       -      +
    156B  LEU*     3.3     4.3    +      -       +      +
    157B  LEU*     3.0    43.5    +      -       +      +
    198B  ALA*     3.8    38.3    -      -       +      +
    201B  ILE*     3.8    36.3    -      -       +      -
    202B  GLY      4.6     2.0    -      -       -      +
    351B  LEU*     3.5    26.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 154 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    145B  GLN*     3.9    20.4    -      -       -      +
    150B  GLU*     2.8    20.7    +      -       +      +
    151B  ALA*     3.5     6.3    -      -       -      +
    153B  LEU*     1.3    75.3    -      -       -      +
    155B  ALA*     1.3    63.8    +      -       -      +
    157B  LEU*     3.2     5.1    +      -       -      +
    158B  ALA*     2.9    22.3    +      -       -      +
    314B  MET*     4.5     9.0    -      -       +      -
    322B  LEU*     3.6    31.2    -      -       +      -
    326B  PHE*     4.0    12.3    -      -       +      -
    349B  TRP      3.7    10.3    -      -       -      +
    351B  LEU*     3.9    31.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 155 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    151B  ALA      3.0    10.0    +      -       -      +
    152B  THR      3.2     8.5    +      -       -      +
    154B  VAL*     1.3    76.5    -      -       -      +
    156B  LEU*     1.3    57.1    +      -       -      +
    158B  ALA*     3.1     9.3    +      -       -      +
    159B  ALA*     2.8    28.6    +      -       -      +
    238B  PHE*     3.9    13.6    -      -       +      -
    267B  TRP*     4.1     7.0    -      -       -      +
    269B  HIS*     3.7    15.0    -      -       -      +
    296B  SER*     3.6    24.0    -      -       -      +
    314B  MET*     3.9     8.7    -      -       +      -
    322B  LEU*     6.3     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 156 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    152B  THR      3.0     9.8    +      -       -      +
    153B  LEU*     3.7    10.5    -      -       +      +
    155B  ALA*     1.3    75.6    -      -       -      +
    157B  LEU*     1.3    58.7    +      -       +      +
    159B  ALA*     3.2     1.7    +      -       -      +
    160B  ARG*     2.7    36.2    +      -       +      +
    185B  ALA*     4.7     4.3    -      -       +      -
    195B  VAL*     5.1     2.7    -      -       +      +
    198B  ALA*     4.0     8.7    -      -       +      +
    199B  GLY*     3.9    27.6    -      -       -      +
    202B  GLY*     4.1    25.8    -      -       -      -
    204B  VAL*     4.4    11.9    -      -       +      -
    237B  PHE*     3.9    15.9    -      -       +      -
    238B  PHE*     3.6    41.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 157 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    201A  ILE*     3.6    29.8    -      -       +      -
    153B  LEU*     3.0    36.4    +      -       +      +
    154B  VAL      3.7     4.0    -      -       -      +
    156B  LEU*     1.3    76.8    -      -       +      +
    158B  ALA*     1.3    63.0    +      -       -      +
    160B  ARG*     3.6    39.9    +      -       -      +
    161B  THR*     3.0    28.2    +      -       -      -
    201B  ILE*     5.6     0.9    -      -       +      -
    202B  GLY*     4.4    14.1    -      -       -      -
    325B  ALA*     3.7     4.6    -      -       +      +
    326B  PHE*     4.4    13.9    -      -       +      -
    351B  LEU*     3.7    24.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 158 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    154B  VAL      2.9    13.4    +      -       -      +
    155B  ALA*     3.4     9.0    -      -       -      +
    157B  LEU*     1.3    76.8    -      -       -      +
    159B  ALA*     1.3    63.6    +      -       -      +
    161B  THR*     3.8     2.1    -      -       -      +
    162B  LYS*     3.0    25.1    +      -       -      +
    267B  TRP*     3.7    16.6    -      -       +      -
    321B  ASP      3.5    22.3    -      -       -      +
    322B  LEU*     4.2    15.0    -      -       +      +
    325B  ALA*     3.5    15.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 159 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    155B  ALA      2.8    13.4    +      -       -      +
    156B  LEU      3.4     7.6    -      -       -      +
    158B  ALA*     1.3    75.1    -      -       -      +
    160B  ARG*     1.3    66.0    +      -       -      +
    162B  LYS*     3.1     4.9    +      -       -      +
    163B  VAL*     3.0    24.1    +      -       -      +
    237B  PHE*     3.9    13.9    -      -       +      +
    238B  PHE*     3.8    12.1    -      -       +      -
    267B  TRP*     3.6    39.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 160 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    160A  ARG*     4.9     2.0    -      -       -      +
    180A  LEU*     6.3     0.2    -      -       -      +
    200A  LEU      3.7     8.9    +      -       -      -
    201A  ILE*     2.8    33.5    +      -       -      +
    202A  GLY      4.9     5.1    +      -       -      -
    203A  GLY*     4.5     5.8    -      -       -      +
    156B  LEU*     2.7    21.9    +      -       +      +
    157B  LEU*     3.6    22.7    +      -       -      +
    159B  ALA*     1.3    73.1    -      -       -      +
    161B  THR*     1.3    71.5    +      -       -      +
    163B  VAL*     3.1     6.6    -      -       -      +
    164B  VAL*     3.1    29.1    +      -       +      +
    176B  GLN*     5.4     7.5    +      -       -      -
    180B  LEU*     3.6    33.5    -      -       +      +
    183B  LEU*     4.0     8.5    -      -       +      -
    201B  ILE      4.6     1.0    +      -       -      -
    202B  GLY*     2.8    45.8    +      -       -      -
    204B  VAL*     4.5     3.8    -      -       +      -
    237B  PHE*     3.5    16.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 161 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    157B  LEU      3.0    18.4    +      -       -      -
    158B  ALA      3.8     3.6    -      -       -      +
    160B  ARG*     1.3    85.6    +      -       -      +
    162B  LYS*     1.3    63.4    +      -       -      +
    164B  VAL*     3.3     6.7    +      -       -      +
    165B  ARG*     3.1    57.8    +      -       +      +
    324B  GLY      4.1     0.7    -      -       -      +
    325B  ALA*     3.8    26.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 162 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    158B  ALA      3.0    18.5    +      -       -      +
    159B  ALA*     3.6     5.6    -      -       -      +
    161B  THR*     1.3    79.2    -      -       -      +
    163B  VAL*     1.3    57.0    +      -       -      +
    165B  ARG*     3.5    13.4    +      -       -      +
    166B  ARG*     3.2    42.2    +      -       -      +
    265B  ASP*     5.9     1.2    +      -       -      -
    267B  TRP*     4.4    13.1    -      -       +      -
    295B  ASP*     4.9     8.3    +      -       -      -
    318B  ARG*     5.0     4.0    -      -       -      +
    321B  ASP*     3.0    44.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 163 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    159B  ALA      3.0    13.8    +      -       -      +
    160B  ARG*     3.1    20.2    -      -       -      +
    162B  LYS*     1.3    75.1    -      -       -      +
    164B  VAL*     1.3    70.1    +      -       -      +
    166B  ARG*     3.5    31.1    -      -       -      +
    167B  LEU*     3.1    40.1    +      -       +      +
    183B  LEU*     4.0    23.6    -      -       +      -
    235B  ILE*     4.6    11.4    -      -       +      -
    236B  PRO      5.3     0.7    -      -       -      +
    237B  PHE*     4.2    22.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 164 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    160B  ARG*     3.1    32.7    +      -       +      +
    161B  THR*     3.7     7.2    -      -       -      +
    163B  VAL*     1.3    78.9    -      -       +      +
    165B  ARG*     1.3    64.3    +      -       +      +
    167B  LEU*     3.6     2.5    +      -       -      +
    168B  GLN*     3.1    44.9    +      -       +      +
    176B  GLN*     4.2    36.1    -      -       +      +
    179B  VAL*     4.0    26.9    -      -       +      -
    180B  LEU*     4.7     3.8    -      -       +      -
    183B  LEU*     4.8     0.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 165 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    161B  THR*     3.1    41.2    +      -       +      +
    162B  LYS*     3.7    13.3    -      -       -      +
    164B  VAL*     1.3    76.9    -      -       +      +
    166B  ARG*     1.3    60.9    +      -       -      +
    168B  GLN*     3.1    12.0    +      -       -      +
    169B  ALA*     2.8    29.3    +      -       -      +
    320B  THR      5.5     1.4    +      -       -      -
    324B  GLY*     2.8    41.8    +      -       -      -
    327B  LYS*     4.2     6.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 166 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    162B  LYS*     3.2    35.4    +      -       -      +
    163B  VAL*     3.5    29.9    -      -       -      +
    165B  ARG*     1.3    78.5    -      -       -      +
    167B  LEU*     1.3    72.7    +      -       +      +
    169B  ALA*     3.0     9.7    +      -       +      +
    170B  ALA*     3.0    24.9    +      -       +      +
    265B  ASP*     3.3    36.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 167 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    163B  VAL*     3.1    34.3    +      -       +      +
    164B  VAL      4.0     4.3    -      -       -      +
    165B  ARG      3.3     0.2    -      -       -      -
    166B  ARG*     1.3    88.5    -      -       +      +
    168B  GLN*     1.3    56.8    +      -       -      +
    170B  ALA*     3.8     7.5    -      -       +      +
    171B  SER*     3.2    17.2    +      -       -      -
    174B  LEU*     2.9    32.9    -      -       +      +
    179B  VAL*     3.4    35.7    -      -       +      -
    235B  ILE*     3.9    25.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 168 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    164B  VAL*     3.1    33.7    +      -       +      +
    165B  ARG*     3.1     9.1    +      -       -      +
    166B  ARG      3.1     0.8    -      -       -      -
    167B  LEU*     1.3    76.9    -      -       +      +
    169B  ALA*     1.3    62.2    +      -       -      +
    170B  ALA      2.9     6.0    +      -       -      -
    171B  SER      4.2     6.5    -      -       -      +
    172B  PRO*     3.1    29.2    -      -       +      +
    173B  GLY      5.3     0.9    -      -       -      +
    174B  LEU*     2.6    37.4    +      -       +      +
    175B  THR*     4.1     0.8    -      -       -      +
    176B  GLN*     3.9    15.8    -      -       -      +
    179B  VAL*     5.4     1.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 169 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    165B  ARG      2.8    16.2    +      -       -      +
    166B  ARG*     3.0    11.4    +      -       +      +
    168B  GLN*     1.3    77.3    -      -       -      +
    170B  ALA*     1.3    59.4    +      -       -      +
    172B  PRO*     4.3     8.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 170 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    166B  ARG*     3.0    15.8    +      -       +      +
    167B  LEU*     3.8     9.9    -      -       +      +
    168B  GLN      2.9     1.4    -      -       -      -
    169B  ALA*     1.3    77.6    -      -       -      +
    171B  SER*     1.3    58.4    +      -       -      +
    172B  PRO*     2.7    20.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 171 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    167B  LEU      3.2    10.1    +      -       -      -
    168B  GLN      3.5     3.4    -      -       -      +
    170B  ALA*     1.3    80.4    +      -       -      +
    172B  PRO*     1.3    67.5    -      -       -      +
    173B  GLY      2.9     4.3    +      -       -      -
    174B  LEU*     3.1    29.3    +      -       -      +
----------------------------------------------------------
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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