Contacts of the helix formed by residues 890 - 918 (chain A) in PDB entry 3MPX


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 GLN 890 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      1A  UNX      3.9    11.6    -      -       -      -
    891A  SER*     1.3    62.2    +      -       -      +
    892A  ARG*     3.3    10.9    -      -       -      +
    893A  ALA*     3.8    13.1    -      -       -      +
    894A  LEU*     3.1    25.8    +      -       -      +
    970A  TRP*     4.8     4.3    +      -       -      -
    974A  GLN*     6.0     5.1    -      -       -      +
   1056A  ASN*     4.2    17.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 891 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      1A  UNX      3.4    14.8    -      -       -      -
    890A  GLN*     1.3    74.1    -      -       -      +
    892A  ARG*     1.3    59.9    +      -       -      +
    894A  LEU*     3.1    12.5    +      -       -      +
    895A  VAL*     2.9    36.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 892 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      1A  UNX      3.7    20.2    -      -       -      -
    890A  GLN      4.6     4.4    -      -       -      +
    891A  SER*     1.3    80.5    -      -       -      +
    893A  ALA*     1.4    59.7    +      -       -      +
    895A  VAL*     3.6     6.3    +      -       -      +
    896A  ILE*     3.2    29.8    +      -       +      +
   1056A  ASN*     3.3    33.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 893 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    890A  GLN*     3.6    12.9    +      -       -      +
    891A  SER      3.3     0.2    -      -       -      -
    892A  ARG*     1.4    75.5    -      -       -      +
    894A  LEU*     1.4    63.3    +      -       -      +
    896A  ILE*     3.4     6.4    +      -       -      +
    897A  ALA*     3.2    22.5    +      -       -      +
    970A  TRP*     4.6     6.0    -      -       +      -
   1053A  TYR*     3.8    30.0    -      -       +      -
   1056A  ASN*     4.0    21.6    -      -       +      +
   1057A  LEU*     4.4    13.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 894 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    890A  GLN      3.1    19.4    +      -       -      +
    891A  SER*     3.1    11.2    +      -       -      +
    893A  ALA*     1.4    76.0    -      -       -      +
    895A  VAL*     1.3    62.5    +      -       +      +
    897A  ALA*     3.3     3.3    +      -       -      +
    898A  GLN*     3.1    50.5    +      -       +      +
    967A  LEU*     4.3     7.2    -      -       +      +
    970A  TRP*     3.4    48.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 895 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    891A  SER*     2.9    19.7    +      -       -      +
    892A  ARG*     3.6     6.7    +      -       -      +
    893A  ALA      3.4     0.2    -      -       -      -
    894A  LEU*     1.3    76.9    -      -       +      +
    896A  ILE*     1.3    57.1    +      -       +      +
    898A  GLN*     3.4    21.6    +      -       -      +
    899A  GLU*     2.8    34.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 896 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    892A  ARG*     3.2    19.6    +      -       +      +
    893A  ALA*     3.8     7.2    -      -       -      +
    894A  LEU      3.3     0.8    -      -       -      -
    895A  VAL*     1.3    78.6    -      -       +      +
    897A  ALA*     1.4    54.6    +      -       -      +
    899A  GLU*     3.1    14.6    +      -       -      +
    900A  LEU*     2.8    32.9    +      -       +      +
   1049A  LEU*     3.5    38.0    -      -       +      +
   1052A  ASP*     3.3    39.0    -      -       +      +
   1053A  TYR*     3.9    15.9    -      -       +      +
   1056A  ASN*     3.5    11.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 897 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    893A  ALA      3.2    13.1    +      -       -      +
    894A  LEU      3.7     7.4    -      -       -      +
    896A  ILE*     1.4    73.7    -      -       -      +
    898A  GLN*     1.3    57.1    +      -       -      +
    900A  LEU*     3.2    13.2    +      -       -      +
    901A  LEU      2.8    24.1    +      -       -      -
    967A  LEU*     3.5    30.9    -      -       +      +
    970A  TRP*     4.2    20.4    -      -       +      -
    976A  VAL*     4.5    13.5    -      -       +      -
   1053A  TYR*     4.8     2.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 898 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    894A  LEU*     3.1    34.5    +      -       -      +
    895A  VAL*     3.5    27.0    -      -       -      +
    897A  ALA*     1.3    75.5    -      -       -      +
    899A  GLU*     1.4    50.3    +      -       -      +
    901A  LEU*     3.2     7.0    +      -       +      +
    902A  SER*     2.8    37.2    +      -       -      -
    967A  LEU*     3.7    17.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 899 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    895A  VAL*     2.8    21.0    +      -       +      +
    896A  ILE*     3.1    19.3    +      -       -      +
    898A  GLN*     1.4    71.0    -      -       -      +
    900A  LEU*     1.3    53.3    +      -       -      +
    902A  SER*     3.3    14.9    +      -       -      +
    903A  SER*     2.7    29.7    +      -       -      -
   1049A  LEU*     3.6    27.2    -      -       +      +
   1099A  HIS*     5.1    13.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 900 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    896A  ILE*     2.8    14.5    +      -       +      +
    897A  ALA*     3.2    10.3    +      -       -      +
    899A  GLU*     1.3    76.0    -      -       -      +
    901A  LEU*     1.4    58.9    +      -       -      +
    903A  SER*     3.1     4.3    +      -       -      -
    904A  GLU*     2.9    27.6    +      -       -      +
    963A  LEU*     4.0    27.6    -      -       +      -
    976A  VAL*     4.7    13.7    -      -       +      -
    980A  PHE*     3.9    24.7    -      -       +      -
   1042A  ARG*     3.2    17.4    +      -       -      +
   1046A  TYR*     3.8    31.4    -      -       +      -
   1049A  LEU*     3.9    22.9    -      -       +      +
   1050A  LEU*     5.2     6.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 901 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    897A  ALA      2.8    16.2    +      -       -      +
    898A  GLN*     3.7     5.8    -      -       -      +
    900A  LEU*     1.4    74.0    -      -       -      +
    902A  SER*     1.3    59.1    +      -       -      +
    904A  GLU*     3.2     5.9    +      -       -      +
    905A  LYS*     3.0    52.9    +      -       -      +
    960A  LEU*     3.7    26.5    -      -       +      -
    963A  LEU*     3.7    11.8    -      -       +      +
    964A  GLU*     3.5    37.9    -      -       +      +
    967A  LEU*     3.7    28.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 902 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    898A  GLN      2.8    18.8    +      -       -      -
    899A  GLU*     3.3    15.8    +      -       -      +
    901A  LEU*     1.3    74.8    -      -       -      +
    903A  SER*     1.4    57.5    +      -       -      +
    905A  LYS*     3.4    19.0    -      -       -      +
    906A  ALA*     3.3    21.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 903 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    899A  GLU*     2.7    23.3    +      -       -      -
    900A  LEU*     3.1     3.8    +      -       -      -
    902A  SER*     1.4    76.4    +      -       -      +
    904A  GLU*     1.3    63.9    +      -       -      +
    906A  ALA*     3.5     8.0    +      -       -      +
    907A  TYR*     3.1    22.9    +      -       -      +
   1042A  ARG*     2.9    38.0    +      -       -      -
   1045A  GLN*     5.2     1.3    -      -       -      -
   1049A  LEU*     4.3     4.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 904 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    900A  LEU      2.9    19.9    +      -       -      +
    901A  LEU      3.2     5.1    +      -       -      +
    903A  SER*     1.3    73.9    -      -       -      +
    905A  LYS*     1.4    58.8    +      -       -      +
    907A  TYR*     3.0     8.4    +      -       -      +
    908A  VAL*     2.9    28.8    +      -       +      +
    956A  HIS*     2.8    38.7    +      -       -      +
    959A  ILE*     3.6    21.9    -      -       +      +
    960A  LEU*     4.2    18.4    -      -       +      +
    963A  LEU*     4.1    12.1    -      -       +      +
   1042A  ARG*     3.1    21.5    +      -       -      +
   1046A  TYR*     2.6    23.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 905 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    901A  LEU*     3.0    45.7    +      -       -      +
    902A  SER*     3.4    15.8    -      -       -      +
    903A  SER      3.4     0.2    -      -       -      -
    904A  GLU*     1.4    71.8    -      -       -      +
    906A  ALA*     1.3    57.4    +      -       -      +
    908A  VAL*     3.2     3.6    +      -       -      +
    909A  GLU*     3.0    30.1    +      -       -      +
    960A  LEU*     3.6    27.4    -      -       +      +
    964A  GLU*     5.8     3.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 906 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    902A  SER      3.3     9.8    +      -       -      +
    903A  SER*     3.7    11.9    -      -       -      +
    905A  LYS*     1.3    78.9    -      -       -      +
    907A  TYR*     1.4    55.8    +      -       -      +
    909A  GLU*     3.6     9.9    -      -       -      +
    910A  MSE      3.2    25.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 907 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      7A  UNX      3.7    11.0    -      -       -      -
    903A  SER      3.1    13.2    +      -       -      +
    904A  GLU*     3.0    15.0    +      -       -      +
    906A  ALA*     1.4    73.2    -      -       -      +
    908A  VAL*     1.3    56.1    -      -       -      +
    910A  MSE      3.3    32.3    +      -       +      +
    911A  LEU*     2.8    55.7    +      -       +      +
    952A  ILE*     4.2     0.3    -      -       -      +
    956A  HIS*     3.4    35.4    +      +       +      -
    990A  HIS*     3.6    15.9    +      -       -      -
   1038A  ARG      3.7     7.2    -      -       -      -
   1039A  VAL*     2.7    26.4    +      -       -      +
   1042A  ARG*     3.4    36.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 908 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    904A  GLU*     2.9    21.7    +      -       -      +
    905A  LYS      3.7     4.0    -      -       -      +
    907A  TYR*     1.3    72.1    -      -       -      +
    909A  GLU*     1.3    58.7    +      -       -      +
    911A  LEU*     3.3     7.9    +      -       -      +
    912A  GLN*     3.0    34.0    +      -       -      +
    953A  HIS*     4.0     5.0    -      -       +      +
    956A  HIS*     3.5    39.5    -      -       +      +
    957A  GLN*     3.9    26.7    -      -       +      +
    960A  LEU*     3.8    26.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 909 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    905A  LYS      3.0    16.9    +      -       -      +
    906A  ALA*     3.6    10.8    -      -       -      +
    908A  VAL*     1.3    75.1    -      -       -      +
    910A  MSE      1.3    59.9    +      -       -      +
    912A  GLN*     3.2    15.3    -      -       -      +
    913A  HIS*     2.8    53.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with MSE 910 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      7A  UNX      3.9     4.5    -      -       -      -
    906A  ALA      3.2    16.1    +      -       -      +
    907A  TYR*     3.3    33.0    +      -       +      +
    909A  GLU*     1.3    76.2    -      -       -      +
    911A  LEU*     1.3    72.1    +      -       +      +
    913A  HIS*     3.6     4.6    +      -       -      +
    914A  LEU*     3.1    28.2    +      -       -      +
   1035A  ARG      5.1     3.4    -      -       -      +
   1038A  ARG*     3.4    52.0    -      -       +      +
   1039A  VAL*     3.9    10.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 911 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    907A  TYR*     2.8    61.3    +      -       +      +
    908A  VAL*     3.3     2.2    +      -       -      +
    910A  MSE      1.3    72.1    -      -       -      +
    912A  GLN*     1.4    61.8    +      -       -      +
    914A  LEU*     3.5     8.8    -      -       +      +
    915A  ASN*     2.8    35.7    +      -       -      +
    949A  LEU*     5.6     2.7    -      -       +      +
    952A  ILE*     3.8    23.6    -      -       +      -
    953A  HIS*     3.8    25.4    -      -       +      +
    956A  HIS*     3.8    17.0    -      -       +      -
   1039A  VAL*     3.8    28.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 912 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    908A  VAL*     3.0    18.1    +      -       -      +
    909A  GLU*     3.2    16.3    -      -       -      +
    911A  LEU*     1.4    74.0    -      -       -      +
    913A  HIS*     1.4    68.6    +      -       +      +
    915A  ASN*     3.0    21.1    +      -       -      +
    916A  LEU*     3.1    14.2    +      -       +      +
    953A  HIS*     3.2    34.9    +      -       -      -
    957A  GLN*     4.0    10.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 913 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    909A  GLU*     2.8    55.8    +      -       -      +
    910A  MSE      4.2     4.4    -      -       -      +
    912A  GLN*     1.4    85.2    -      -       +      +
    914A  LEU*     1.3    58.9    +      -       -      +
    916A  LEU*     3.9    16.4    -      -       +      +
    917A  ASP*     2.9    48.1    +      -       -      +
   1021A  PHE*     5.0     1.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 914 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    910A  MSE      3.1    23.4    +      -       -      +
    911A  LEU*     3.5    13.9    -      -       +      +
    912A  GLN      3.2     0.2    -      -       -      -
    913A  HIS*     1.3    76.8    -      -       -      +
    915A  ASN*     1.3    56.1    +      -       -      +
    918A  PHE*     2.7    42.7    +      -       +      +
    919A  HIS*     3.0     8.8    +      -       -      -
    949A  LEU*     4.2    17.7    -      -       +      -
   1021A  PHE*     3.6    33.4    -      -       +      -
   1035A  ARG*     4.8     7.0    -      -       +      +
   1036A  LEU*     3.8    18.6    -      -       +      -
   1039A  VAL*     3.5    31.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 915 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    911A  LEU*     2.8    26.8    +      -       -      +
    912A  GLN*     3.0    10.8    +      -       -      +
    914A  LEU*     1.3    80.3    -      -       -      +
    916A  LEU*     1.3    53.3    +      -       -      +
    919A  HIS*     3.6    14.8    -      -       +      +
    920A  GLY*     2.8    30.0    +      -       -      -
    949A  LEU*     3.6    18.4    +      -       -      +
    950A  PRO*     3.2    36.9    -      -       -      +
    953A  HIS*     3.6    26.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 916 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    912A  GLN*     3.1    13.8    +      -       +      +
    913A  HIS*     4.2    16.4    -      -       +      +
    914A  LEU      3.3     0.2    -      -       -      -
    915A  ASN*     1.3    80.4    -      -       -      +
    917A  ASP*     1.3    74.2    +      -       -      +
    918A  PHE      3.6     0.2    -      -       -      -
    920A  GLY*     3.8     3.1    -      -       -      -
    921A  ALA      3.8     5.0    +      -       -      -
    924A  ARG*     3.8    21.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 917 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    913A  HIS*     2.9    31.9    +      -       -      +
    916A  LEU*     1.3    99.6    -      -       -      +
    918A  PHE*     1.3    58.7    +      -       -      +
    921A  ALA*     3.4    19.4    -      -       -      +
    924A  ARG*     5.5     0.9    -      -       -      +
   1020A  GLU      5.2     2.9    -      -       -      +
   1021A  PHE*     3.4    31.9    +      -       +      +
   1024A  SER      4.6    13.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 918 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    914A  LEU*     2.7    27.3    +      -       +      +
    917A  ASP*     1.3    74.5    -      -       -      +
    919A  HIS*     1.3    66.2    +      -       -      -
    921A  ALA      3.4     0.9    +      -       -      -
    922A  VAL*     2.9    40.0    +      -       +      +
    946A  LEU*     3.4    26.0    -      -       +      -
    949A  LEU*     3.6    19.3    -      -       +      -
   1000A  TYR*     4.6     3.8    -      +       -      -
   1001A  LEU*     4.4     1.8    -      -       +      -
   1004A  LEU*     3.5    33.2    -      -       +      -
   1018A  VAL*     4.9     4.3    -      -       +      -
   1021A  PHE*     3.4    42.6    -      +       +      -
   1032A  ALA*     4.1    11.9    -      -       +      -
   1036A  LEU*     3.6    24.2    -      -       +      -
----------------------------------------------------------
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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