Contacts of the helix formed by residues 158 - 181 (chain B) in PDB entry 6YB9


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 GLY 158 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    146B  ILE*     4.4     9.2    -      -       -      -
    156B  LEU*     3.3     8.5    +      -       -      -
    157B  ILE*     1.3    72.9    -      -       -      +
    159B  GLN*     1.3    67.0    +      -       -      -
    160B  THR      3.2     2.7    -      -       -      -
    161B  GLU*     2.9    17.3    +      -       -      -
    162B  VAL*     3.0    27.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 159 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    142B  GLU*     5.2     4.7    -      -       -      +
    146B  ILE*     3.9    35.5    -      -       +      +
    158B  GLY*     1.3    70.0    -      -       -      +
    160B  THR*     1.3    61.2    +      -       -      +
    162B  VAL*     3.3     2.1    +      -       -      +
    163B  ASP*     2.9    53.3    +      -       -      +
    414B  LYS*     3.5    13.9    -      -       -      +
    421B  ARG*     6.4     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 160 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    158B  GLY      3.2     0.6    -      -       -      -
    159B  GLN*     1.3    80.6    -      -       -      +
    161B  GLU*     1.3    74.6    +      -       -      +
    163B  ASP*     3.5     2.6    +      -       -      +
    164B  ILE*     3.0    50.9    +      -       +      +
    414B  LYS*     4.2    31.7    +      -       +      +
    415B  GLN*     4.4     7.9    -      -       -      +
    418B  LYS*     4.2    15.9    -      -       +      +
    421B  ARG*     3.5    27.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 161 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    155B  LEU*     4.1    15.6    -      -       +      +
    156B  LEU      3.4    17.5    -      -       -      +
    157B  ILE*     4.1     9.9    -      -       +      -
    158B  GLY*     2.9    38.2    +      -       -      +
    160B  THR*     1.3    87.0    -      -       -      +
    162B  VAL*     1.3    61.0    +      -       -      +
    164B  ILE*     3.3     9.7    +      -       +      +
    165B  MET*     3.0    34.1    +      -       -      +
    203B  ILE*     3.7    25.7    -      -       +      +
    415B  GLN*     5.1     3.3    +      -       -      +
    418B  LYS*     2.7    29.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 162 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98B  TRP*     3.9    11.0    -      -       +      -
    142B  GLU*     3.9    37.5    -      -       +      +
    145B  LEU*     3.7    37.5    -      -       +      -
    146B  ILE*     4.1    17.7    -      -       +      -
    157B  ILE*     3.9    13.7    -      -       +      +
    158B  GLY      3.0    14.6    +      -       -      +
    159B  GLN*     3.7     4.7    -      -       -      +
    161B  GLU*     1.3    74.3    -      -       -      +
    163B  ASP*     1.3    63.4    +      -       -      +
    165B  MET*     3.3     4.4    +      -       -      +
    166B  SER*     3.0    24.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 163 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    142B  GLU*     5.1     6.7    -      -       -      +
    159B  GLN*     2.9    33.3    +      -       -      +
    160B  THR      3.8     4.3    -      -       -      +
    162B  VAL*     1.3    76.8    -      -       -      +
    164B  ILE*     1.3    61.1    +      -       -      +
    166B  SER*     3.6     5.0    +      -       -      -
    167B  HIS*     3.0    54.1    +      -       -      +
    410B  TRP*     3.6    16.8    -      -       -      -
    414B  LYS*     2.9    25.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 164 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    160B  THR*     3.0    40.0    +      -       +      +
    161B  GLU*     3.6     9.6    -      -       +      +
    162B  VAL      3.2     0.4    -      -       -      -
    163B  ASP*     1.3    74.1    -      -       -      +
    165B  MET*     1.3    64.5    +      -       +      +
    167B  HIS*     3.5     1.9    +      -       -      +
    168B  ALA*     2.9    31.3    +      -       +      +
    203B  ILE*     5.2    15.7    -      -       +      +
    407B  LEU*     5.0     1.0    -      -       -      +
    410B  TRP*     4.0    19.5    -      -       +      -
    411B  ILE*     4.0    33.0    -      -       +      -
    414B  LYS*     4.5     8.7    -      -       +      -
    415B  GLN*     3.9    22.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with MET 165 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     94B  ILE*     3.8    37.9    -      -       +      -
     98B  TRP*     2.9    54.5    -      -       +      +
    145B  LEU*     5.5     0.4    -      -       +      -
    157B  ILE*     5.0     6.7    -      -       -      -
    161B  GLU      3.0    23.2    +      -       -      +
    162B  VAL*     3.3     1.5    +      -       -      -
    164B  ILE*     1.3    75.3    -      -       -      +
    166B  SER*     1.3    54.0    +      -       -      +
    168B  ALA*     4.3     1.3    -      -       -      -
    169B  THR*     2.6    38.5    +      -       -      -
    194B  PHE*     3.5    42.3    -      -       +      -
    203B  ILE*     3.9    18.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 166 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98B  TRP*     3.8    15.8    -      -       -      -
    126B  VAL*     3.7    28.0    -      -       -      +
    128B  LEU*     5.5     0.9    -      -       -      +
    142B  GLU*     3.6    21.2    +      -       -      -
    162B  VAL      3.0    17.9    +      -       -      -
    163B  ASP*     3.7     6.5    -      -       -      -
    165B  MET*     1.3    74.8    -      -       -      +
    167B  HIS*     1.3    67.5    +      -       -      +
    169B  THR*     3.4     4.2    +      -       -      -
    170B  GLN*     3.4    16.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 167 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    163B  ASP*     3.0    43.1    +      -       -      +
    164B  ILE      4.0     1.1    -      -       -      +
    166B  SER*     1.3    79.6    -      -       -      +
    168B  ALA*     1.3    65.7    +      -       -      +
    170B  GLN*     3.4    12.9    +      -       -      +
    171B  ALA*     3.1    22.5    +      -       -      +
    403B  ARG*     4.8     2.1    +      -       -      -
    407B  LEU*     3.9    12.5    -      -       +      +
    410B  TRP*     3.5    47.7    +      +       +      -
----------------------------------------------------------
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Residues in contact with ALA 168 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     73B  ILE*     6.3     0.2    -      -       +      -
    164B  ILE*     2.9    23.0    +      -       +      +
    165B  MET*     3.8     4.0    -      -       -      +
    167B  HIS*     1.3    74.3    -      -       -      +
    169B  THR*     1.3    60.6    +      -       -      +
    171B  ALA*     3.3     0.7    +      -       -      +
    172B  ILE*     2.9    41.6    +      -       +      +
    194B  PHE*     3.9    20.6    -      -       +      -
    407B  LEU*     3.9    24.8    -      -       +      +
    411B  ILE*     5.4     1.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 169 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98B  TRP*     3.4    34.3    -      -       +      +
     99B  VAL      4.3     5.8    -      -       -      +
    100B  CYS*     4.0    19.5    -      -       +      -
    126B  VAL*     4.1    14.8    -      -       +      -
    165B  MET      2.6    22.8    +      -       -      -
    166B  SER      3.6     6.1    -      -       -      -
    167B  HIS      3.3     0.4    -      -       -      -
    168B  ALA*     1.3    76.6    -      -       -      +
    170B  GLN*     1.3    62.1    +      -       -      +
    172B  ILE*     3.5     0.3    +      -       -      +
    173B  PHE*     3.0    22.9    +      -       -      +
    190B  MET*     3.7     5.2    -      -       +      +
    192B  ILE*     4.0    16.6    -      -       +      -
    194B  PHE*     3.5     7.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 170 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    100B  CYS*     4.1     8.7    -      -       -      -
    123B  PRO*     3.9    24.8    -      -       -      +
    124B  PRO*     2.9    36.5    +      -       +      +
    126B  VAL*     4.2    11.2    -      -       +      +
    166B  SER      3.4     9.7    +      -       -      +
    167B  HIS*     3.7    14.5    -      -       -      +
    168B  ALA      3.3     0.4    -      -       -      -
    169B  THR*     1.3    77.8    -      -       -      +
    171B  ALA*     1.3    55.1    +      -       -      +
    173B  PHE*     3.3     3.8    +      -       -      +
    174B  GLU*     2.9    50.9    +      -       -      +
    403B  ARG*     4.5     6.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 171 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     73B  ILE*     4.8     4.7    -      -       +      -
    167B  HIS      3.1    15.0    +      -       -      +
    168B  ALA      3.3     4.2    +      -       -      +
    170B  GLN*     1.3    72.8    -      -       -      +
    172B  ILE*     1.3    66.3    +      -       -      +
    174B  GLU*     3.3     1.7    +      -       -      +
    175B  ILE*     3.0    32.1    +      -       +      +
    403B  ARG*     3.6    39.1    -      -       +      +
    407B  LEU*     4.0    23.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 172 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     68B  LEU*     4.1    25.7    -      -       +      +
     73B  ILE*     3.9    35.7    -      -       +      -
    168B  ALA*     2.9    27.6    +      -       +      +
    169B  THR      3.8     3.1    -      -       -      +
    171B  ALA*     1.3    76.4    -      -       -      +
    173B  PHE*     1.3    62.3    +      -       -      +
    175B  ILE*     3.4     3.0    +      -       -      +
    176B  LEU*     3.0    25.9    +      -       +      +
    190B  MET*     3.7    20.6    -      -       +      -
    192B  ILE*     3.9    22.0    -      -       +      -
    194B  PHE*     4.3    12.3    -      -       +      -
    205B  LEU*     4.2    11.7    -      -       +      -
    209B  ILE*     4.4     8.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 173 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    100B  CYS*     3.6    24.2    -      -       +      -
    102B  ARG*     3.6    23.6    -      -       +      -
    124B  PRO*     4.1    16.8    -      -       +      -
    169B  THR      3.0    18.1    +      -       -      +
    170B  GLN      3.5     3.8    -      -       -      +
    172B  ILE*     1.3    77.0    -      -       -      +
    174B  GLU*     1.3    55.4    +      -       -      +
    176B  LEU*     3.3     2.7    +      -       -      +
    177B  GLU*     2.7    62.0    +      -       +      +
    187B  LEU*     3.6    35.7    -      -       +      -
    188B  VAL      4.0     0.2    -      -       -      -
    189B  ASP*     3.8    22.9    -      -       -      -
    190B  MET*     3.5    34.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 174 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    317A  GLU*     4.9    14.5    -      -       -      +
    506A  EDO      4.7     1.0    +      -       -      -
    102B  ARG*     4.7     3.8    -      -       -      +
    123B  PRO*     5.7     0.7    -      -       -      +
    124B  PRO*     4.2    23.0    -      -       +      +
    170B  GLN*     2.9    33.9    +      -       -      +
    171B  ALA      3.3     3.8    +      -       -      +
    173B  PHE*     1.3    75.8    -      -       +      +
    175B  ILE*     1.3    56.9    +      -       -      +
    177B  GLU*     3.5    14.1    -      -       -      +
    178B  LYS*     2.8    31.7    +      -       -      +
    399B  TRP*     3.9    21.0    -      -       +      -
    403B  ARG*     3.1    41.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 175 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     67B  LEU*     5.0     6.7    -      -       +      -
     68B  LEU*     3.8    18.4    -      -       +      -
     71B  ALA*     4.6     5.2    -      -       +      -
     73B  ILE*     3.9    33.4    -      -       +      -
    171B  ALA      3.0    21.5    +      -       -      +
    172B  ILE      3.7     3.4    -      -       -      +
    174B  GLU*     1.3    76.2    -      -       -      +
    176B  LEU*     1.3    56.5    +      -       +      +
    178B  LYS*     3.4     2.4    +      -       -      +
    179B  SER*     2.6    40.4    +      -       -      +
    399B  TRP*     4.0    10.8    -      -       +      -
    400B  SER*     3.6    38.0    +      -       -      +
    403B  ARG*     4.0    16.2    -      -       +      -
    404B  ALA*     4.2     7.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 176 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     64B  ILE*     3.8    38.1    -      -       +      -
     67B  LEU*     4.0    18.2    -      -       +      -
     68B  LEU*     3.9    17.3    -      -       +      -
    172B  ILE*     3.0    19.7    +      -       +      +
    173B  PHE*     3.8     0.9    -      -       -      +
    175B  ILE*     1.3    72.1    -      -       -      +
    177B  GLU*     1.3    65.7    +      -       -      +
    179B  SER*     3.2     4.7    +      -       -      -
    180B  TRP*     3.1    32.8    +      -       +      -
    187B  LEU*     3.6    15.5    -      -       +      -
    190B  MET*     4.2    19.1    -      -       -      -
    209B  ILE*     4.1    15.0    -      -       +      -
    214B  TRP*     4.1    17.7    -      -       +      -
    259B  LEU*     5.5     0.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 177 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    318A  GLY      4.7     0.5    -      -       -      +
    506A  EDO      3.6    23.6    +      -       -      -
    102B  ARG*     2.7    60.8    +      -       -      +
    173B  PHE*     2.7    35.4    +      -       +      +
    174B  GLU*     3.5    10.6    -      -       -      +
    176B  LEU*     1.3    74.1    -      -       -      +
    178B  LYS*     1.3    61.5    +      -       -      +
    180B  TRP*     3.4     9.4    +      -       -      +
    181B  LEU*     3.4    17.8    +      -       +      +
    185B  CYS      4.9     1.0    -      -       -      +
    186B  THR*     6.0     0.5    -      -       -      +
    187B  LEU*     3.4    27.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 178 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    317A  GLU      4.5     1.8    +      -       -      -
    320A  GLY*     5.4     1.0    -      -       -      -
    345A  TYR*     3.1    31.3    +      -       -      -
    506A  EDO      3.1    30.6    +      -       -      +
    174B  GLU      2.8    19.7    +      -       -      +
    175B  ILE      3.8     4.0    -      -       -      +
    177B  GLU*     1.3    73.3    -      -       -      +
    179B  SER*     1.3    61.8    +      -       -      +
    181B  LEU*     3.4    16.6    -      -       +      +
    182B  PRO*     3.3    17.3    -      -       -      +
    392B  GLY      5.6     2.2    -      -       -      +
    396B  HIS*     4.1    20.8    -      -       +      +
    399B  TRP*     3.4    53.2    -      -       +      +
    400B  SER*     5.2     0.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 179 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     67B  LEU*     3.8    19.8    -      -       -      +
    175B  ILE*     2.6    23.5    +      -       -      +
    176B  LEU*     3.6     6.1    -      -       -      -
    177B  GLU      3.2     0.4    -      -       -      -
    178B  LYS*     1.3    76.3    -      -       -      +
    180B  TRP*     1.3    57.2    +      -       -      +
    181B  LEU      3.4     0.2    -      -       -      -
    182B  PRO*     3.4    14.0    -      -       -      +
    183B  GLN*     4.7     1.9    +      -       -      +
    259B  LEU*     3.5    32.9    -      -       -      +
    396B  HIS*     3.3    32.0    +      -       -      -
    400B  SER*     4.1     6.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with TRP 180 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     64B  ILE*     4.9     0.2    -      -       -      +
    176B  LEU*     3.1    27.5    +      -       +      +
    177B  GLU      3.4     4.2    +      -       -      +
    178B  LYS      3.3     0.2    -      -       -      -
    179B  SER*     1.3    74.4    -      -       -      +
    181B  LEU*     1.3    65.3    +      -       -      +
    182B  PRO*     3.4     1.6    -      -       -      -
    183B  GLN*     3.0    33.3    +      -       +      +
    185B  CYS*     3.4    42.5    +      -       +      +
    187B  LEU*     4.3    14.1    -      -       +      -
    214B  TRP*     3.6    38.7    -      +       -      -
    216B  LEU*     3.7    39.5    -      -       +      +
    251B  TRP*     4.9     2.2    -      +       -      -
    252B  VAL*     4.0    16.2    -      -       +      -
    255B  ARG*     4.3    12.6    -      -       +      -
    256B  VAL*     4.2    20.0    -      -       +      -
    259B  LEU*     3.7    31.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 181 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    320A  GLY*     4.3    21.1    -      -       -      +
    506A  EDO      4.1    28.7    -      -       -      +
    177B  GLU*     3.4    12.6    +      -       +      +
    178B  LYS*     3.4    18.8    -      -       +      +
    180B  TRP*     1.3    76.2    -      -       -      +
    182B  PRO*     1.4    64.6    -      -       +      +
    184B  ASN*     2.8    28.3    +      -       -      -
    185B  CYS      4.0    11.9    -      -       -      +
    186B  THR*     5.6     3.8    -      -       -      +
----------------------------------------------------------
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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