Contacts of the helix formed by residues 181 - 206 (chain B) in PDB entry 4JDA


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 THR 181 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    176B  ILE*     4.4     1.8    -      -       -      -
    180B  ASN*     1.3    78.0    +      -       -      +
    182B  GLU*     1.3    64.4    +      -       -      +
    183B  GLU*     3.7     5.5    +      -       -      +
    184B  ASP*     3.0    38.3    +      -       -      +
    185B  THR*     3.0    26.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 182 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     49B  THR      4.1     6.1    -      -       -      +
     50B  CYS*     3.9    18.6    -      -       +      -
     51B  THR      5.8     0.7    -      -       -      -
    176B  ILE*     3.6    32.6    -      -       +      +
    181B  THR*     1.3    72.8    -      -       -      +
    183B  GLU*     1.3    60.8    +      -       -      +
    185B  THR*     3.1     3.6    +      -       -      -
    186B  ARG*     2.4    59.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 183 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    181B  THR*     3.5     6.1    +      -       -      +
    182B  GLU*     1.3    78.4    +      -       -      +
    184B  ASP*     1.3    63.9    +      -       -      +
    186B  ARG*     3.4    24.2    +      -       -      +
    187B  MET*     3.0    31.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 184 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    180B  ASN*     5.1     8.5    -      -       -      +
    181B  THR*     3.0    34.0    +      -       -      +
    182B  GLU      3.2     1.2    -      -       -      -
    183B  GLU*     1.3    81.7    -      -       -      +
    185B  THR*     1.3    59.7    +      -       -      +
    187B  MET*     3.4    31.2    -      -       -      +
    188B  PHE*     3.7    11.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 185 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     50B  CYS*     4.3     8.5    -      -       +      -
    141B  LEU*     4.4     8.5    -      -       +      -
    174B  VAL*     4.2    24.5    -      -       +      -
    175B  ASP      4.9     0.2    -      -       -      +
    176B  ILE*     4.4     4.0    -      -       -      +
    177B  PRO*     3.5    30.8    -      -       +      +
    180B  ASN*     4.1     5.9    -      -       -      +
    181B  THR      3.0    14.0    +      -       -      -
    182B  GLU*     3.1     9.0    +      -       -      -
    184B  ASP*     1.3    75.6    -      -       -      +
    186B  ARG*     1.3    64.3    +      -       -      +
    188B  PHE*     3.2     5.8    +      -       +      +
    189B  VAL*     3.0    31.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 186 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     50B  CYS*     3.6    11.6    -      -       -      -
     51B  THR      4.0     9.2    -      -       -      -
     52B  SER*     3.9    19.7    -      -       -      +
    172B  TYR*     3.5    17.7    -      -       -      +
    182B  GLU*     2.4    48.6    +      -       -      +
    183B  GLU*     3.8    21.6    +      -       -      +
    185B  THR*     1.3    76.5    -      -       -      +
    187B  MET*     1.3    62.4    +      -       -      +
    190B  ASP*     2.8    41.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 187 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     59A  ASP*     3.2    45.5    -      -       +      +
    205A  THR*     5.5     4.3    -      -       +      +
    183B  GLU      3.0    14.4    +      -       -      +
    184B  ASP*     3.4    35.9    -      -       -      +
    186B  ARG*     1.3    77.2    -      -       -      +
    188B  PHE*     1.3    61.0    +      -       +      +
    190B  ASP*     3.5     6.6    +      -       -      +
    191B  THR*     2.6    34.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 188 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    202A  VAL*     4.6    17.0    -      -       +      -
    205A  THR*     4.6    12.1    -      -       +      -
    206A  ALA      3.7    19.1    -      -       -      +
    207A  SER*     3.5    31.6    -      -       -      -
    111B  LEU*     5.3     5.4    -      -       +      -
    141B  LEU*     4.3    17.7    -      -       +      -
    184B  ASP      3.7    11.6    +      -       -      +
    185B  THR*     3.2     9.9    +      -       +      +
    187B  MET*     1.3    83.6    -      -       +      +
    189B  VAL*     1.3    72.0    +      -       +      +
    191B  THR*     3.3     8.7    +      -       -      -
    192B  VAL*     3.2    41.7    +      -       +      +
    301B  A9S      4.1    25.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 189 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    141B  LEU*     3.8    32.8    -      -       +      -
    144B  TYR*     3.9     6.5    -      -       +      -
    172B  TYR*     3.4    45.1    -      -       +      +
    174B  VAL*     4.8     1.8    -      -       +      -
    185B  THR*     3.0    18.0    +      -       +      +
    188B  PHE*     1.3    80.8    -      -       +      +
    190B  ASP*     1.3    59.4    +      -       -      +
    191B  THR      3.1     1.8    -      -       -      -
    192B  VAL*     2.9     7.2    +      -       -      +
    193B  VAL*     2.8    29.0    +      -       +      +
    301B  A9S      3.6    20.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 190 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     52B  SER*     2.8    19.5    +      -       -      -
     54B  ILE*     4.3    20.2    -      -       +      +
    172B  TYR*     2.7    30.1    +      -       -      -
    186B  ARG*     2.8    24.6    +      -       -      +
    187B  MET*     3.7     6.8    -      -       -      +
    189B  VAL*     1.3    75.5    -      -       -      +
    191B  THR*     1.3    57.1    -      -       -      +
    193B  VAL*     3.8     1.5    -      -       -      +
    194B  LYS*     2.9    31.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 191 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    198A  GLN*     4.4    10.1    -      -       -      +
    201A  ALA*     4.3    15.3    -      -       +      +
    202A  VAL*     3.3    31.1    -      -       +      +
    205A  THR*     5.1     5.5    -      -       +      +
    187B  MET*     2.6    23.3    +      -       -      +
    188B  PHE*     3.4    10.0    -      -       +      -
    189B  VAL      3.1     0.6    -      -       -      -
    190B  ASP*     1.3    77.0    -      -       -      +
    192B  VAL*     1.3    57.8    +      -       -      +
    194B  LYS*     4.1     4.1    -      -       -      +
    195B  SER*     3.1    26.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 192 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    202A  VAL*     4.3    15.0    -      -       +      -
     81B  PHE*     5.0     5.6    -      -       +      -
    188B  PHE*     3.2    41.7    +      -       +      +
    189B  VAL*     2.9     7.9    +      -       -      +
    191B  THR*     1.3    77.8    -      -       -      +
    193B  VAL*     1.3    61.3    +      -       -      +
    195B  SER*     3.1     5.4    +      -       -      -
    196B  ASN*     2.9    37.9    +      -       -      +
    301B  A9S      3.7    52.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 193 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     54B  ILE*     4.3    19.5    -      -       +      -
    144B  TYR*     4.0    20.9    -      -       -      +
    170B  GLU*     3.4    44.0    -      -       +      +
    172B  TYR*     4.4     8.5    -      -       +      -
    189B  VAL*     2.8    28.8    +      -       +      +
    190B  ASP      4.2     1.8    -      -       -      +
    192B  VAL*     1.3    76.1    -      -       -      +
    194B  LYS*     1.3    57.5    +      -       -      +
    196B  ASN*     3.2     8.0    +      -       -      +
    197B  LEU*     2.9    36.4    +      -       +      +
    301B  A9S      4.2    10.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 194 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    198A  GLN*     3.1    33.7    -      -       -      +
     54B  ILE*     4.5    19.2    -      -       +      +
     56B  HIS*     5.4    10.8    -      -       +      -
    190B  ASP      2.9    20.4    +      -       -      +
    191B  THR*     4.3     1.3    -      -       -      +
    193B  VAL*     1.3    77.7    -      -       -      +
    195B  SER*     1.3    60.7    +      -       -      +
    197B  LEU*     3.6     4.1    +      -       -      +
    198B  GLN*     3.3    23.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 195 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    195A  SER*     6.0     0.2    -      -       -      -
    198A  GLN*     3.7    25.0    +      -       -      +
    199A  ASN*     2.5    31.9    +      -       -      -
    202A  VAL*     4.2     4.3    -      -       -      -
     80B  HIS*     5.3     0.2    -      -       -      +
     81B  PHE*     4.1     7.8    -      -       -      -
    191B  THR      3.1    20.4    +      -       -      -
    192B  VAL*     3.1     8.0    +      -       -      -
    193B  VAL      3.1     0.2    -      -       -      -
    194B  LYS*     1.3    75.1    -      -       -      +
    196B  ASN*     1.3    66.7    +      -       -      +
    198B  GLN*     3.4     3.2    +      -       -      +
    199B  ASN*     3.1    28.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 196 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     78B  TYR*     3.6    23.7    -      -       +      -
     79B  LYS*     3.5    35.2    -      -       -      +
     80B  HIS      4.3     3.5    +      -       -      -
     81B  PHE*     5.1     4.9    -      -       -      -
     82B  ILE*     5.9     0.4    -      -       -      +
    170B  GLU*     4.8     3.4    +      -       -      +
    192B  VAL*     2.9    25.0    +      -       -      +
    193B  VAL*     3.5    10.5    -      -       -      +
    195B  SER*     1.3    78.5    +      -       -      +
    197B  LEU*     1.3    67.0    +      -       +      +
    198B  GLN      3.3     0.2    +      -       -      -
    199B  ASN*     3.3     3.1    +      -       -      +
    200B  LEU*     3.0    22.5    +      -       -      +
    301B  A9S      3.4    34.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 197 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     54B  ILE*     4.1    22.0    -      -       +      +
     56B  HIS*     3.3    41.9    +      -       +      +
     58B  VAL*     4.9     0.9    -      -       -      +
     78B  TYR*     5.2     3.4    -      -       +      -
    148B  THR*     5.1     1.1    -      -       +      -
    168B  VAL*     3.9    35.4    -      -       +      +
    170B  GLU*     4.0    30.3    -      -       +      +
    193B  VAL*     2.9    21.7    +      -       +      +
    194B  LYS*     3.6     5.1    +      -       -      +
    195B  SER      3.3     0.2    -      -       -      -
    196B  ASN*     1.3    79.7    -      -       +      +
    198B  GLN*     1.3    57.8    +      -       -      +
    200B  LEU*     3.4    16.2    -      -       +      +
    201B  ALA*     3.0    21.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 198 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    191A  THR*     3.7    29.3    +      -       -      +
    194A  LYS*     3.9    20.4    -      -       +      +
    195A  SER*     3.5    30.7    -      -       -      +
    198A  GLN*     4.7    11.2    -      -       +      +
     56B  HIS*     3.2    29.4    +      -       -      +
    194B  LYS*     3.3    18.7    +      -       +      +
    195B  SER*     3.9     5.6    -      -       -      +
    196B  ASN      3.3     0.2    -      -       -      -
    197B  LEU*     1.3    73.2    -      -       -      +
    199B  ASN*     1.3    66.1    +      -       -      +
    201B  ALA*     3.2    11.3    +      -       -      +
    202B  VAL*     3.2    16.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 199 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     80A  HIS*     3.7    21.2    +      -       -      +
     81A  PHE*     3.5    11.5    -      -       -      -
    195A  SER*     2.6    30.8    +      -       -      -
    199A  ASN*     3.2    24.9    +      -       -      -
     78B  TYR*     3.2    27.3    +      -       -      +
     80B  HIS*     3.8    15.6    -      -       -      +
    195B  SER*     3.1    19.0    +      -       -      -
    196B  ASN*     3.6     1.8    -      -       -      +
    198B  GLN*     1.3    74.7    -      -       -      +
    200B  LEU*     1.3    64.0    +      -       -      +
    202B  VAL      3.2     1.6    +      -       -      -
    203B  ILE*     3.1    24.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 200 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     58B  VAL*     5.7     1.1    -      -       +      -
     65B  ILE*     3.8    25.8    -      -       +      -
     68B  PHE*     3.8    25.8    -      -       +      -
     69B  VAL*     3.9    15.7    -      -       +      -
     78B  TYR*     3.7    21.5    -      -       +      -
    148B  THR*     6.0     0.2    -      -       +      -
    168B  VAL*     4.4    12.1    -      -       +      -
    196B  ASN      3.0    16.7    +      -       -      +
    197B  LEU*     3.4    25.8    -      -       +      +
    198B  GLN      3.1     0.2    -      -       -      -
    199B  ASN*     1.3    77.7    -      -       -      +
    201B  ALA*     1.3    57.7    +      -       -      +
    203B  ILE*     3.1    10.8    -      -       +      +
    204B  SER*     2.8    50.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 201 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    191A  THR*     5.2     3.1    -      -       +      +
     56B  HIS*     3.6    12.3    -      -       +      -
     57B  ARG      4.8     0.2    -      -       -      +
     58B  VAL*     3.6    40.4    -      -       +      -
    197B  LEU      3.0    14.0    +      -       -      +
    198B  GLN*     3.2    12.5    +      -       -      +
    200B  LEU*     1.3    78.0    -      -       -      +
    202B  VAL*     1.3    55.5    +      -       -      +
    204B  SER*     4.2     0.2    -      -       -      -
    205B  THR*     2.7    35.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 202 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     81A  PHE*     3.3    41.5    -      -       +      -
    111A  LEU*     4.8    11.2    -      -       +      -
    188A  PHE*     4.8     8.9    -      -       +      -
    191A  THR*     3.0    43.7    -      -       +      +
    192A  VAL*     4.5    13.0    -      -       +      +
    195A  SER*     4.3     3.6    -      -       -      -
    198B  GLN      3.2    12.5    +      -       -      +
    199B  ASN      3.2     1.3    +      -       -      +
    200B  LEU      3.1     0.6    -      -       -      -
    201B  ALA*     1.3    76.0    -      -       -      +
    203B  ILE*     1.3    63.8    +      -       -      +
    205B  THR*     3.4     3.3    +      -       -      -
    206B  ALA*     3.1    24.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 203 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     81A  PHE*     3.6    22.9    -      -       +      -
    108A  VAL*     5.8     1.3    -      -       +      -
    110A  GLY*     4.4    23.1    -      -       -      +
    111A  LEU*     5.5     0.7    -      -       +      -
     68B  PHE*     3.4    57.8    -      -       +      -
     77B  LYS*     4.0    13.0    -      -       +      +
     78B  TYR*     3.5    26.5    -      -       +      -
    199B  ASN      3.1    16.1    +      -       -      +
    200B  LEU*     3.1    14.6    -      -       +      +
    202B  VAL*     1.3    77.5    -      -       -      +
    204B  SER*     1.3    60.4    +      -       -      +
    205B  THR      3.5     0.2    +      -       -      -
    206B  ALA*     3.5    18.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 204 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     58B  VAL*     4.4     0.2    -      -       -      -
     60B  ALA*     3.8    12.6    -      -       -      +
     61B  PRO*     5.4     0.5    -      -       -      +
     64B  ALA*     3.9    15.5    -      -       -      +
     65B  ILE*     3.3    42.5    -      -       -      +
     68B  PHE*     3.7    11.1    -      -       -      -
    200B  LEU*     2.8    34.9    +      -       -      +
    201B  ALA*     4.0     6.1    -      -       -      -
    203B  ILE*     1.3    77.7    -      -       -      +
    205B  THR*     1.3    60.6    +      -       -      +
    206B  ALA      4.9     1.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with THR 205 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    187A  MET*     6.4     2.0    -      -       -      -
    188A  PHE*     5.7     9.6    -      -       +      -
     58B  VAL*     4.0     4.3    -      -       -      +
     59B  ASP*     3.3    25.6    +      -       +      +
     60B  ALA*     3.9     9.0    -      -       -      +
    201B  ALA*     2.7    21.9    +      -       -      +
    202B  VAL*     4.0     3.8    -      -       -      -
    204B  SER*     1.3    76.6    -      -       -      +
    206B  ALA*     1.3    64.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 206 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    110A  GLY      4.7     6.3    -      -       -      +
    111A  LEU*     3.6    29.2    -      -       +      -
    112A  PRO*     4.7    13.8    -      -       +      +
    188A  PHE*     5.1    10.9    -      -       +      -
    202B  VAL      3.1    18.5    +      -       -      +
    203B  ILE*     3.5    12.3    +      -       -      +
    204B  SER      3.5     1.7    -      -       -      -
    205B  THR*     1.3    82.1    -      -       -      +
----------------------------------------------------------
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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