Contacts of the helix formed by residues 146 - 168 (chain D) in PDB entry 1WNT


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 HIS 146 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    162B  VAL*     4.0     5.0    -      -       -      +
    166B  GLU*     4.2     0.4    +      -       -      -
     88D  LEU      5.7     0.7    -      -       -      -
     89D  LEU*     3.5    34.0    -      -       +      +
    138D  CYS*     4.6     6.3    -      -       +      -
    143D  VAL*     3.4    23.1    +      -       +      +
    144D  THR      2.7    23.1    +      -       -      -
    145D  ASN*     1.3    81.5    -      -       +      +
    147D  SER*     1.3    64.3    +      -       -      +
    148D  VAL      3.3     3.4    -      -       -      +
    149D  TYR*     3.7    36.0    -      +       +      +
    150D  CYS*     3.1    33.6    +      -       -      +
    190D  THR*     4.5    13.4    +      -       +      -
    191D  TRP*     4.3    18.3    +      +       -      -
----------------------------------------------------------
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Residues in contact with SER 147 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    112B  ILE*     5.7     1.6    -      -       -      -
    159B  LEU*     4.4     9.8    -      -       -      +
    162B  VAL*     3.7    22.3    -      -       -      +
    166B  GLU*     3.4    16.8    +      -       -      -
     90D  GLN      3.7     8.3    +      -       -      -
     92D  PHE*     3.5    36.2    -      -       -      -
     95D  VAL*     4.0     8.4    -      -       -      +
    145D  ASN      3.7     1.0    -      -       -      -
    146D  HIS*     1.3    75.8    -      -       -      +
    148D  VAL*     1.3    54.4    +      -       -      +
    151D  SER*     2.3    33.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 148 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    112B  ILE*     4.2     5.6    -      -       +      -
     88D  LEU      4.9     9.5    +      -       -      +
     95D  VAL*     4.0    25.0    -      -       +      +
     99D  ALA*     4.2     5.2    -      -       +      +
    100D  PHE*     3.7    34.1    -      -       +      +
    103D  SER*     3.3    30.3    -      -       -      +
    104D  PHE*     3.3    21.7    -      -       +      -
    146D  HIS      3.3     0.4    -      -       -      -
    147D  SER*     1.3    79.2    -      -       -      +
    149D  TYR*     1.3    57.2    +      -       -      +
    151D  SER*     3.1     6.7    +      -       -      -
    152D  THR*     2.8    32.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 149 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     86D  VAL      3.8    22.4    -      -       -      -
     87D  ALA*     4.1    11.0    -      -       +      -
     88D  LEU      5.0     5.4    +      -       -      +
     89D  LEU*     4.4    17.7    -      -       +      -
    103D  SER*     5.7     0.7    -      -       -      -
    107D  ASN*     3.9     8.5    -      -       -      +
    136D  SER*     4.3     6.5    -      -       -      -
    138D  CYS*     3.8    13.0    -      -       +      -
    146D  HIS*     3.7    31.1    +      +       +      +
    147D  SER      3.6     0.2    -      -       -      -
    148D  VAL*     1.3    80.3    -      -       -      +
    150D  CYS*     1.3    61.0    +      -       -      +
    152D  THR*     2.3    26.4    +      -       -      -
    153D  LYS*     2.8    39.2    +      -       +      +
    186D  MET*     2.9    34.5    -      -       +      +
   3245D  NAP      3.3    20.7    +      +       -      -
----------------------------------------------------------
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Residues in contact with CYS 150 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    158B  MET*     3.5    21.5    -      -       +      +
    162B  VAL*     4.2     4.9    -      -       +      -
    138D  CYS*     2.0    61.3    -      -       -      +
    141D  ARG      3.9     6.3    -      -       -      -
    142D  ALA*     4.4     0.2    -      -       -      -
    143D  VAL      4.1     8.5    -      -       -      -
    146D  HIS*     3.1    31.4    +      -       -      +
    149D  TYR*     1.3    78.3    -      -       -      +
    151D  SER*     1.3    51.7    +      -       -      +
    153D  LYS*     3.2     2.1    +      -       -      +
    154D  GLY*     2.5    35.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 151 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108B  LEU*     4.1     8.2    -      -       -      +
    112B  ILE*     5.9     0.7    -      -       -      +
    155B  ALA*     3.7    23.1    -      -       -      +
    158B  MET*     4.3     4.7    -      -       -      +
    159B  LEU*     3.6    18.7    -      -       -      +
    100D  PHE*     5.8     0.2    -      -       -      -
    104D  PHE*     3.9    17.0    -      -       -      -
    147D  SER      2.3    27.4    +      -       -      -
    148D  VAL*     3.1     8.0    +      -       -      -
    150D  CYS*     1.3    72.6    -      -       -      +
    152D  THR*     1.3    62.4    +      -       -      +
    154D  GLY      4.3     0.4    -      -       -      +
    155D  ALA*     2.8    29.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 152 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    103D  SER*     3.8    22.7    -      -       -      +
    104D  PHE*     3.8    32.1    -      -       +      -
    107D  ASN*     3.4    31.5    +      -       +      +
    108D  LEU*     4.8     4.0    -      -       +      +
    148D  VAL      2.8    21.2    +      -       -      +
    149D  TYR*     2.3    30.8    +      -       -      -
    151D  SER*     1.3    73.6    -      -       -      +
    153D  LYS*     1.3    56.3    +      -       -      +
    155D  ALA*     2.8    11.1    +      -       -      +
    156D  LEU*     2.7    35.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 153 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     85D  ALA*     3.9     8.1    -      -       -      +
    107D  ASN*     4.9     5.6    -      -       +      +
    134D  VAL      3.4    16.2    +      -       -      -
    135D  SER*     3.2    31.5    +      -       -      -
    136D  SER*     3.5    12.8    -      -       -      +
    138D  CYS*     4.6     0.2    -      -       -      -
    139D  SER*     3.2    30.9    -      -       -      +
    149D  TYR*     2.8    39.6    +      -       +      +
    150D  CYS*     3.4     9.0    -      -       -      +
    152D  THR*     1.3    84.3    +      -       -      +
    154D  GLY*     1.3    64.3    +      -       -      +
    156D  LEU*     3.3    12.4    +      -       +      +
    157D  ASP      3.3    12.6    +      -       -      -
   3245D  NAP      2.8    32.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 154 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    154B  GLY*     4.2    13.0    -      -       -      +
    158B  MET*     4.0    11.0    -      -       -      -
    139D  SER*     3.5    20.8    -      -       -      -
    150D  CYS      2.5    20.5    +      -       -      -
    151D  SER      3.9     1.1    -      -       -      -
    153D  LYS*     1.3    69.4    -      -       -      +
    155D  ALA*     1.3    66.1    +      -       -      +
    157D  ASP*     3.4     6.4    +      -       -      +
    158D  MET*     3.4    17.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 155 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    104B  PHE*     4.5     0.9    -      -       +      -
    151B  SER*     3.8    26.3    +      -       -      +
    155B  ALA*     4.0     7.0    -      -       +      +
    104D  PHE*     5.1     0.2    -      -       +      -
    108D  LEU*     3.6    29.2    -      -       +      -
    151D  SER      2.8    15.5    +      -       -      +
    152D  THR*     2.9    14.4    -      -       -      +
    154D  GLY*     1.3    75.9    -      -       -      +
    156D  LEU*     1.3    49.5    +      -       -      +
    158D  MET*     3.0     5.9    +      -       -      +
    159D  LEU*     2.7    34.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 156 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     82D  ASN      5.6     1.3    -      -       -      +
    107D  ASN      4.2    11.9    -      -       -      +
    108D  LEU*     4.1    19.0    -      -       +      +
    111D  VAL*     4.2    15.7    -      -       +      -
    133D  ASN*     4.0    34.5    -      -       +      +
    134D  VAL      3.8    22.7    -      -       -      +
    135D  SER*     3.9    13.7    -      -       -      +
    152D  THR      2.7    15.1    +      -       -      +
    153D  LYS*     3.4    20.6    -      -       +      +
    154D  GLY      3.3     0.2    -      -       -      -
    155D  ALA*     1.3    72.4    -      -       -      +
    157D  ASP*     1.3    52.3    +      -       -      +
    159D  LEU*     3.1    10.7    +      -       +      +
    160D  THR*     2.7    38.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 157 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    135D  SER*     2.7    28.1    +      -       -      -
    139D  SER*     2.3    27.9    +      -       -      +
    140D  GLN*     2.9    20.9    +      -       -      +
    153D  LYS      3.3     4.4    +      -       -      -
    154D  GLY*     3.7     7.0    -      -       -      +
    155D  ALA      3.3     0.2    -      -       -      -
    156D  LEU*     1.3    74.8    -      -       -      +
    158D  MET*     1.3    62.0    +      -       -      +
    160D  THR*     3.3     8.5    +      -       -      -
    161D  LYS*     3.1    34.3    +      -       -      +
    176D  ALA*     4.4     1.7    -      -       -      +
    178D  ASN*     3.2     7.3    +      -       -      -
    234D  THR*     3.8    20.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with MET 158 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    138B  CYS      3.1    20.2    -      -       -      +
    139B  SER      3.3    26.9    -      -       -      +
    140B  GLN*     3.6    15.3    -      -       -      +
    141B  ARG      3.6     0.4    -      -       -      -
    142B  ALA*     3.4    34.1    -      -       +      +
    150B  CYS*     3.7    30.5    -      -       +      +
    151B  SER*     4.4     2.2    -      -       -      -
    154B  GLY*     3.9     7.4    -      -       -      -
    154D  GLY      3.4     6.8    +      -       -      +
    155D  ALA      3.0     8.0    +      -       -      +
    157D  ASP*     1.3    80.1    -      -       -      +
    159D  LEU*     1.3    62.0    +      -       -      +
    161D  LYS*     3.2    18.0    +      -       +      -
    162D  VAL*     2.9    30.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 159 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     92B  PHE*     4.0    15.0    -      -       +      -
    147B  SER*     4.1    14.1    -      -       -      +
    151B  SER*     3.7    19.4    +      -       -      +
    108D  LEU*     3.1    33.0    -      -       +      +
    111D  VAL*     4.2     9.4    -      -       +      -
    112D  ILE*     3.7    36.1    -      -       +      -
    155D  ALA      2.7    16.3    +      -       -      +
    156D  LEU*     3.1    14.3    +      -       +      +
    158D  MET*     1.3    77.6    -      -       -      +
    160D  THR*     1.3    63.7    +      -       -      +
    162D  VAL*     3.2     4.1    +      -       -      -
    163D  MET*     2.9    34.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 160 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133D  ASN*     3.1    17.2    +      -       -      +
    156D  LEU      2.7    23.7    +      -       -      -
    157D  ASP*     3.4    11.0    -      -       -      -
    159D  LEU*     1.3    74.9    -      -       -      +
    161D  LYS*     1.3    58.9    +      -       -      +
    163D  MET*     3.4     2.6    +      -       -      +
    164D  ALA*     2.8    27.2    +      -       -      +
    174D  VAL*     3.4    28.8    -      -       +      +
    175D  ASN*     3.7    26.2    -      -       -      -
    176D  ALA*     3.8    16.1    -      -       -      +
    232D  GLY*     4.2     6.7    -      -       -      -
    233D  SER      4.3     3.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 161 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    242A  TRP      5.2     1.3    -      -       -      +
    243A  ALA*     3.8    37.5    -      -       +      +
    140B  GLN*     5.0     7.6    -      -       -      +
    142B  ALA*     3.8     6.3    -      -       +      +
    140D  GLN*     5.4     2.0    -      -       -      +
    157D  ASP*     3.1    25.3    +      -       -      +
    158D  MET*     3.2    20.8    +      -       +      +
    160D  THR*     1.3    76.3    -      -       -      +
    162D  VAL*     1.3    58.7    +      -       -      +
    164D  ALA*     3.5     8.2    -      -       -      +
    165D  LEU*     3.0    27.9    +      -       -      +
    232D  GLY*     3.4    24.8    +      -       -      +
    233D  SER*     4.7     1.4    -      -       -      +
    234D  THR*     3.7    26.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 162 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     92B  PHE*     5.9     0.2    -      -       -      -
    142B  ALA*     3.3    20.9    -      -       +      -
    143B  VAL      3.3    27.4    -      -       -      +
    147B  SER*     3.7    35.0    -      -       -      +
    150B  CYS*     4.1    14.6    -      -       +      -
    158D  MET      2.9    20.4    +      -       -      +
    159D  LEU*     3.9     4.5    -      -       -      +
    161D  LYS*     1.3    73.7    -      -       -      +
    163D  MET*     1.3    61.0    +      -       -      +
    165D  LEU*     3.3     2.7    +      -       +      +
    166D  GLU*     2.9    45.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with MET 163 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     92B  PHE*     3.5    44.2    -      -       +      -
    111D  VAL*     4.8     2.7    -      -       -      -
    115D  SER*     3.5    32.3    -      -       -      +
    131D  ILE*     3.7    22.4    -      -       +      -
    133D  ASN*     4.4     9.4    -      -       -      +
    159D  LEU*     2.9    34.8    +      -       +      +
    160D  THR      3.5     4.3    -      -       -      +
    162D  VAL*     1.3    75.8    -      -       -      +
    164D  ALA*     1.3    62.2    +      -       -      +
    166D  GLU*     5.0     2.0    -      -       -      -
    167D  LEU*     2.9    39.4    +      -       +      +
    174D  VAL*     3.8    19.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 164 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    205A  PRO*     4.0     5.7    -      -       +      +
    243A  ALA*     5.1     3.4    -      -       +      -
    160D  THR      2.8    21.2    +      -       -      +
    161D  LYS      3.5     5.2    -      -       -      +
    162D  VAL      3.3     0.2    -      -       -      -
    163D  MET*     1.3    72.7    -      -       -      +
    165D  LEU*     1.3    57.3    +      -       -      +
    167D  LEU      3.8     0.2    -      -       -      -
    168D  GLY*     2.8    30.7    +      -       -      -
    172D  ILE      4.7     1.9    -      -       -      +
    174D  VAL*     3.7    12.7    -      -       -      +
    231D  THR*     3.7    16.7    +      -       +      +
    232D  GLY*     3.5    31.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 165 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    205A  PRO*     3.8    24.9    -      -       +      +
    243A  ALA*     5.7     0.9    -      -       +      +
    244A  CYS*     4.2    26.2    -      -       +      -
    142B  ALA*     3.8    27.6    -      -       +      +
    143B  VAL*     4.1     1.8    -      -       -      -
    144B  THR*     4.0    30.1    -      -       -      +
    161D  LYS      3.0    16.6    +      -       -      +
    162D  VAL*     3.9     3.4    -      -       +      +
    164D  ALA*     1.3    76.1    -      -       -      +
    166D  GLU*     1.3    68.0    +      -       +      +
    168D  GLY*     3.6     5.5    +      -       -      -
    169D  PRO*     3.6     9.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 166 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91B  PRO*     3.5     9.7    -      -       -      +
     92B  PHE*     2.9    34.5    +      -       +      +
    144B  THR*     3.8    23.8    -      -       +      +
    145B  ASN*     2.9    27.4    +      -       -      +
    147B  SER*     3.4    18.0    +      -       -      -
    162D  VAL*     2.9    28.7    +      -       +      +
    163D  MET      4.3     0.7    -      -       -      +
    165D  LEU*     1.3    76.2    -      -       +      +
    167D  LEU*     1.3    61.2    +      -       +      +
    168D  GLY      3.1     0.4    -      -       -      -
    169D  PRO*     3.0    21.5    -      -       -      +
    170D  HIS*     4.1     7.6    +      -       -      -
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Residues in contact with LEU 167 (chain D). Click here for Legend to table.
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                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
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     92B  PHE*     4.4    13.0    -      -       +      -
     93B  LEU*     4.5    12.6    -      -       +      -
    119D  ALA*     4.2    24.7    -      -       +      -
    123D  ILE*     4.0    27.4    -      -       +      -
    131D  ILE*     4.4     9.4    -      -       +      -
    163D  MET*     2.9    43.5    +      -       +      +
    164D  ALA      3.8     0.2    -      -       -      -
    166D  GLU*     1.3    77.9    -      -       +      +
    168D  GLY*     1.3    59.0    +      -       -      +
    169D  PRO*     3.4     0.7    -      -       -      -
    170D  HIS*     2.8    29.7    +      -       +      +
    172D  ILE*     3.5    29.9    +      -       +      +
    174D  VAL*     4.4     4.5    -      -       +      -
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Residues in contact with GLY 168 (chain D). Click here for Legend to table.
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                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
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    205A  PRO*     3.1    22.1    -      -       -      +
    206A  LEU*     3.9    14.1    -      -       -      +
    164D  ALA      2.8    20.7    +      -       -      -
    165D  LEU      3.6     1.5    +      -       -      -
    166D  GLU      3.1     0.4    -      -       -      -
    167D  LEU*     1.3    74.9    -      -       -      +
    169D  PRO*     1.3    65.1    -      -       -      +
    170D  HIS      3.1     4.3    +      -       -      -
    171D  LYS*     3.1    16.5    +      -       -      +
    172D  ILE      4.1     7.0    -      -       -      -
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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
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  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) +   -    +    +   +   +    +    -
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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