Contacts of the helix formed by residues 905 - 928 (chain A) in PDB entry 3U3F


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 905 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    901A  LEU*     4.3     9.2    -      -       -      +
    902A  PRO*     2.7    20.4    +      -       -      +
    904A  GLU*     1.3    70.0    -      -       -      +
    906A  TYR*     1.3    61.8    +      -       -      -
    907A  VAL      3.0     5.8    -      -       -      -
    908A  VAL*     2.9    22.2    +      -       -      +
    909A  VAL*     3.5    12.3    +      -       -      +
    897C  GLU*     6.1     0.7    -      -       -      -
    901C  LEU*     4.2    23.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 906 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    898A  LEU*     3.7    37.4    +      -       +      -
    901A  LEU*     3.6    30.3    +      -       +      -
    902A  PRO      3.9     5.6    -      -       -      -
    903A  PRO*     3.6    39.3    -      -       +      +
    904A  GLU      3.3     1.2    -      -       -      -
    905A  GLY*     1.3    76.8    -      -       -      +
    907A  VAL*     1.3    60.8    +      -       -      +
    909A  VAL*     3.2    22.6    -      -       -      +
    910A  VAL*     3.4    13.2    +      -       -      +
    957A  MET*     3.8    19.3    -      -       +      +
    960A  ALA*     4.4    28.5    -      -       +      -
    961A  GLN*     4.5     6.7    -      -       +      -
    973A  LYS*     3.6    27.1    +      -       +      +
    976A  MET*     4.1     9.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 907 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    904A  GLU      3.3    12.8    -      -       -      +
    905A  GLY      2.9     0.4    +      -       -      -
    906A  TYR*     1.3    80.3    -      -       -      +
    908A  VAL*     1.3    57.6    +      -       -      +
    910A  VAL*     3.6     1.9    +      -       -      +
    911A  LYS*     2.9    54.4    +      -       -      +
    957A  MET*     4.2     7.4    -      -       +      -
    958A  ARG*     4.2    11.2    -      -       -      +
    961A  GLN*     3.0    30.5    -      -       -      +
    274E  LEU*     4.4    21.2    -      -       +      +
----------------------------------------------------------
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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      4.8     0.2    +      -       -      -
    905A  GLY*     2.9    13.1    +      -       -      +
    907A  VAL*     1.3    76.2    -      -       -      +
    909A  VAL*     1.3    66.3    +      -       -      +
    911A  LYS*     3.0    14.2    +      -       +      +
    912A  ASN*     2.9    18.4    +      -       -      +
    897C  GLU*     4.4    17.7    +      -       -      +
    901C  LEU*     5.8     2.0    -      -       +      -
    908C  VAL*     3.6    20.0    -      -       +      -
    909C  VAL*     4.9     8.5    -      -       +      -
    912C  ASN*     3.5    15.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 909 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    894A  LEU*     4.2    18.8    -      -       +      -
    897A  GLU*     3.7    25.4    -      -       +      +
    898A  LEU*     4.5     7.9    -      -       +      -
    901A  LEU*     3.4    32.5    -      -       +      -
    905A  GLY      4.0     2.7    -      -       -      +
    906A  TYR*     3.2    20.2    -      -       +      +
    908A  VAL*     1.3    76.3    -      -       -      +
    910A  VAL*     1.3    77.3    +      -       +      +
    912A  ASN*     2.9    28.0    +      -       -      +
    913A  VAL*     3.0    11.6    +      -       -      +
    976A  MET*     4.8     0.7    -      -       +      -
    908C  VAL*     4.0    15.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 910 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    894A  LEU*     4.3     2.9    -      -       +      -
    906A  TYR      3.4    16.2    +      -       -      +
    907A  VAL      4.1     2.0    -      -       -      +
    908A  VAL      3.3     0.2    -      -       -      -
    909A  VAL*     1.3    81.6    -      -       +      +
    911A  LYS*     1.3    57.4    +      -       -      +
    913A  VAL*     3.1     7.5    +      -       -      +
    914A  GLY*     2.7    33.4    +      -       -      -
    950A  LEU*     4.4     4.3    -      -       +      -
    953A  LEU*     3.8    29.2    -      -       +      -
    954A  ILE*     3.9    28.3    -      -       +      -
    957A  MET*     4.1    15.5    -      -       +      -
    976A  MET*     3.7    24.7    -      -       +      -
    271E  MET*     4.5     0.2    -      -       -      +
    274E  LEU*     4.4     6.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 911 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    907A  VAL*     2.9    31.6    +      -       +      +
    908A  VAL*     3.1    18.6    -      -       +      +
    910A  VAL*     1.3    77.2    -      -       -      +
    912A  ASN*     1.3    54.2    +      -       -      +
    914A  GLY      3.4     0.5    +      -       -      -
    915A  LEU*     3.0    36.2    +      -       +      +
    893C  GLU*     3.0    37.9    +      -       -      +
    912C  ASN*     3.6    15.5    -      -       -      +
    271E  MET*     3.5    13.3    -      -       +      +
    274E  LEU*     3.4    45.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 912 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    890A  ALA*     5.0     6.1    -      -       +      -
    897A  GLU*     5.7     0.5    -      -       -      +
    908A  VAL      2.9     6.8    +      -       -      +
    909A  VAL*     2.9    11.7    +      -       -      +
    911A  LYS*     1.3    71.0    -      -       -      +
    913A  VAL*     1.3    63.2    +      -       +      +
    914A  GLY      3.1     1.3    -      -       -      -
    915A  LEU*     2.9    17.9    +      -       -      +
    916A  THR*     2.9    20.6    +      -       +      +
    908C  VAL*     3.3    34.0    -      -       -      +
    911C  LYS*     4.0    13.6    -      -       -      +
    912C  ASN*     3.2    30.9    +      -       -      +
    915C  LEU*     3.2    26.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 913 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    887A  LEU*     4.3     4.4    -      -       +      +
    890A  ALA*     3.7    31.2    -      -       +      +
    891A  VAL*     4.5    13.0    -      -       +      +
    894A  LEU*     3.9    20.2    -      -       +      -
    909A  VAL      3.0    12.7    +      -       -      +
    910A  VAL*     3.1     8.0    +      -       -      +
    912A  ASN*     1.3    79.5    -      -       +      +
    914A  GLY*     1.3    62.9    +      -       -      +
    916A  THR*     3.3     9.0    +      -       -      +
    917A  LEU*     3.1    23.7    +      -       -      +
    950A  LEU*     4.8     1.1    -      -       +      -
    953A  LEU*     4.3    11.0    -      -       +      -
    980A  SER*     5.8     0.7    -      -       -      -
    983A  LEU*     3.7    30.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 914 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    910A  VAL      2.7    12.7    +      -       -      -
    913A  VAL*     1.3    79.3    -      -       -      +
    915A  LEU*     1.3    55.3    +      -       -      +
    917A  LEU*     3.2     6.6    +      -       -      +
    918A  ARG*     3.0    25.8    +      -       -      +
    950A  LEU*     4.1    19.7    -      -       -      +
    267E  LEU*     4.5     1.7    -      -       -      +
    271E  MET*     3.3    29.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 915 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    911A  LYS*     3.0    23.1    +      -       +      +
    912A  ASN      2.9     5.6    +      -       -      +
    914A  GLY*     1.3    72.8    -      -       -      +
    916A  THR*     1.3    64.9    +      -       -      +
    917A  LEU      3.1     1.1    -      -       -      -
    918A  ARG*     3.1    20.1    +      -       +      +
    919A  LYS*     3.2    12.0    +      -       -      +
    912C  ASN*     3.9    15.9    -      -       +      +
    915C  LEU*     4.2    26.2    -      -       +      +
    916C  THR*     3.6    30.1    -      -       +      -
    919C  LYS*     4.0    31.2    -      -       -      +
    271E  MET*     4.5    13.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 916 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    883A  ASN*     4.7     5.0    -      -       -      +
    886A  GLU*     4.4    18.4    -      -       +      +
    887A  LEU*     4.0    21.2    -      -       -      +
    890A  ALA*     3.8    18.4    -      -       +      +
    912A  ASN*     2.9    18.2    +      -       +      +
    913A  VAL*     3.3    10.7    +      -       -      -
    915A  LEU*     1.3    74.9    -      -       -      +
    917A  LEU*     1.3    62.9    +      -       -      +
    919A  LYS*     3.3    11.3    +      -       -      +
    920A  LEU*     3.1    21.0    +      -       -      +
    911C  LYS*     5.9     4.7    -      -       -      +
    915C  LEU*     3.6    29.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 917 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    887A  LEU*     3.4    23.1    -      -       +      -
    913A  VAL      3.1    19.4    +      -       -      +
    914A  GLY      3.2     5.4    -      -       -      +
    915A  LEU      3.1     0.8    -      -       -      -
    916A  THR*     1.3    76.5    +      -       -      +
    918A  ARG*     1.3    59.5    +      -       -      +
    920A  LEU*     3.2     4.9    +      -       +      -
    921A  ILE*     2.9    52.4    +      -       +      +
    946A  LEU*     4.0    29.2    -      -       +      +
    950A  LEU*     4.2    22.9    -      -       +      -
    983A  LEU*     4.6    12.3    -      -       +      -
    267E  LEU*     4.1    21.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 918 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    914A  GLY      3.0    10.5    +      -       -      +
    915A  LEU*     3.1    15.2    +      -       +      +
    917A  LEU*     1.3    76.2    -      -       -      +
    919A  LYS*     1.3    58.3    +      -       -      +
    921A  ILE*     3.6     2.2    +      -       -      +
    922A  GLY*     2.9    26.7    +      -       -      -
    879C  LEU*     5.6    11.7    -      -       -      +
    882C  LEU*     6.2     1.8    -      -       -      +
    883C  ASN*     5.3     1.8    -      -       -      +
    886C  GLU*     5.5     0.6    +      -       -      -
    919C  LYS*     3.7    47.7    -      -       -      +
    264E  THR*     4.5    20.1    -      -       +      +
    267E  LEU*     3.5    27.8    -      -       +      -
    268E  ASP*     2.7    42.3    +      -       -      +
    271E  MET*     5.7     4.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 919 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    883A  ASN*     2.9    30.7    -      -       -      +
    886A  GLU*     2.8    43.9    +      -       -      +
    915A  LEU      3.2     7.6    +      -       -      +
    916A  THR*     3.4    11.8    +      -       -      +
    918A  ARG*     1.3    78.4    -      -       -      +
    920A  LEU*     1.3    64.5    +      -       -      +
    922A  GLY*     3.3     1.5    +      -       -      -
    923A  SER*     3.0    26.0    +      -       -      -
    915C  LEU*     4.4    15.3    -      -       +      -
    918C  ARG*     3.1    45.3    -      -       -      +
    268G  ASP*     6.0     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 920 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    880A  VAL*     4.0    11.2    -      -       +      +
    883A  ASN*     3.6    19.2    -      -       +      +
    884A  VAL*     3.6    40.4    -      -       +      -
    887A  LEU*     4.2    18.6    -      -       +      -
    916A  THR      3.1    12.2    +      -       -      +
    917A  LEU*     3.2    10.1    +      -       +      +
    919A  LYS*     1.3    71.3    -      -       -      +
    921A  ILE*     1.3    65.2    +      -       +      +
    922A  GLY      2.9     5.2    +      -       -      -
    923A  SER*     3.0    16.5    +      -       -      +
    924A  VAL*     3.0    16.7    +      -       +      +
    946A  LEU*     4.4     7.6    -      -       +      -
    987A  ALA*     4.4    11.4    -      -       +      -
    990A  LEU*     3.7    26.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 921 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    917A  LEU*     2.9    41.1    +      -       +      +
    918A  ARG*     4.0     4.5    -      -       -      +
    920A  LEU*     1.3    76.6    -      -       +      +
    922A  GLY*     1.3    57.0    +      -       -      +
    924A  VAL*     4.0     1.6    -      -       -      -
    925A  ASP*     3.1    23.4    +      -       -      +
    943A  GLN*     3.3    35.1    +      -       +      +
    946A  LEU*     4.5     8.1    -      -       +      -
    947A  ASN*     3.2    31.4    -      -       -      +
    990A  LEU*     5.8     0.4    -      -       +      -
    263E  ALA*     3.5    27.4    -      -       +      -
    264E  THR*     4.0    15.5    -      -       +      +
    267E  LEU*     4.5     4.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 922 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    918A  ARG      2.9    18.1    +      -       -      -
    919A  LYS      3.3     1.5    +      -       -      -
    920A  LEU      2.9     0.2    -      -       -      -
    921A  ILE*     1.3    76.3    -      -       -      +
    923A  SER*     1.3    62.2    +      -       -      +
    924A  VAL      3.2     0.2    -      -       -      -
    925A  ASP*     3.3     6.2    +      -       -      +
    926A  ASP*     3.1    31.1    +      -       -      +
    264E  THR*     4.2    13.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with SER 923 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    879A  LEU*     4.5    19.5    -      -       -      -
    880A  VAL*     3.9    18.0    -      -       -      +
    883A  ASN*     2.7    28.8    +      -       -      -
    919A  LYS*     3.0     6.3    +      -       -      -
    920A  LEU*     3.0    11.4    +      -       -      -
    922A  GLY*     1.3    73.2    -      -       -      +
    924A  VAL*     1.3    64.5    +      -       -      +
    926A  ASP*     3.5    23.0    +      -       -      +
    927A  LEU*     3.8     6.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 924 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    880A  VAL*     3.7    32.1    -      -       +      -
    920A  LEU*     3.0    17.9    +      -       +      +
    921A  ILE*     4.6     0.2    -      -       -      -
    923A  SER*     1.3    74.4    -      -       -      +
    925A  ASP*     1.3    51.7    +      -       -      +
    926A  ASP      2.6    15.8    +      -       -      -
    927A  LEU*     2.7    20.9    +      -       +      +
    928A  LEU*     2.9    23.0    +      -       +      +
    939A  ILE*     4.3    12.6    -      -       +      -
    943A  GLN*     3.2    29.4    -      -       +      +
    990A  LEU*     3.8    23.3    -      -       +      -
    994A  VAL*     4.6     9.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 925 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    921A  ILE      3.1    17.6    +      -       -      +
    922A  GLY*     3.3     9.2    +      -       -      +
    924A  VAL*     1.3    77.8    -      -       -      +
    926A  ASP*     1.3    62.4    +      -       -      +
    927A  LEU      3.4     0.2    -      -       -      -
    928A  LEU*     3.5    15.4    +      -       -      +
    929A  PRO*     3.9    10.7    -      -       -      +
    940A  GLU*     5.9     1.4    -      -       -      +
    943A  GLN*     3.7    17.0    +      -       -      +
    262E  SER*     4.0    10.8    +      -       -      -
    263E  ALA*     3.6    29.6    +      -       -      +
    264E  THR*     3.9    11.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 926 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    922A  GLY      3.1    17.8    -      -       -      +
    923A  SER*     3.5    17.6    -      -       -      +
    924A  VAL      2.6     6.3    +      -       -      -
    925A  ASP*     1.3    76.4    -      -       -      +
    927A  LEU*     1.3    60.1    +      -       +      +
    929A  PRO*     3.1    20.3    -      -       -      +
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Residues in contact with LEU 927 (chain A). Click here for Legend to table.
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                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
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    880A  VAL*     4.1    14.6    -      -       +      -
    923A  SER      4.2     9.6    -      -       -      +
    924A  VAL*     2.7    16.0    +      -       +      +
    926A  ASP*     1.3    71.8    -      -       +      +
    928A  LEU*     1.3    67.1    +      -       +      +
    929A  PRO*     2.8     7.8    -      -       -      +
    930A  SER*     2.9    32.3    +      -       -      +
    931A  LEU*     4.4    11.4    -      -       +      +
    994A  VAL*     3.9    20.2    -      -       +      -
    998A  LYS*     3.6    34.5    -      -       +      +
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Residues in contact with LEU 928 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    924A  VAL*     2.9    50.0    -      -       +      +
    925A  ASP*     3.5    19.7    -      -       -      +
    926A  ASP      3.5     0.2    -      -       -      -
    927A  LEU*     1.3    79.0    -      -       +      +
    929A  PRO*     1.4    71.0    -      -       +      +
    930A  SER      3.1     0.9    +      -       -      -
    931A  LEU*     3.4    15.2    +      -       +      +
    936A  ARG*     3.3    55.2    +      -       +      +
    939A  ILE*     3.8    28.5    -      -       +      -
    940A  GLU*     4.7    13.0    -      -       +      +
    943A  GLN*     4.6     1.8    -      -       -      +
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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) +   -    +    +   +   +    +    -
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Warning!
Atom classes for heterogroups are automatically assigned based on the atomic coordinates. However, in three cases (see below) the automatic assignment is currently ambiguous. In these cases, the user is advised to manually analyse the full list of contacts using LPC software.
1. Carbon atoms belonging to a 4-, 5- or 6-member ring are 
   considered "aromatic" (Class V) if the ring is approximately
   planar, and "hydrophobic" (Class IV) or "neutral" (Classes
   VI, VII, VIII) if the ring is non-planar.
2. The oxygen atom of a carbonyl or hydroxy group is considered
   "hydroxy" (Class I) if the CO bond is longer than 1.29 Å, and
   "carbonyl" (Class II) if shorter.
3. All nitrogen atoms are considered "hydrophilic" (Class I).

Please E-mail any questions and/or suggestions concerning this page to Vladimir.Sobolev@weizmann.ac.il