Contacts of the helix formed by residues 54 - 81 (chain C) in PDB entry 2YMB


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 ASP 54 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     52C  THR*     4.5     0.6    -      -       -      +
     53C  LYS*     1.3    76.4    -      -       -      +
     55C  ASN*     1.3    60.2    +      -       -      +
     56C  THR*     3.0    16.3    +      -       -      -
     57C  LYS*     2.8    59.1    +      -       +      +
     58C  ARG*     2.8    32.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 55 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     53C  LYS      3.3     6.7    +      -       -      -
     54C  ASP*     1.3    73.1    +      -       -      +
     56C  THR*     1.3    61.1    +      -       -      +
     58C  ARG*     3.8    23.4    +      -       -      +
     59C  CYS*     3.5    19.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 56 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     54C  ASP*     3.0    11.7    +      -       -      -
     55C  ASN*     1.3    78.1    -      -       -      +
     57C  LYS*     1.3    60.5    +      -       +      +
     58C  ARG      3.2     0.2    -      -       -      -
     59C  CYS*     3.2     6.1    +      -       -      +
     60C  ASN*     3.0    47.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 57 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     52C  THR*     4.8    18.4    -      -       +      -
     54C  ASP*     2.8    41.8    +      -       +      +
     56C  THR*     1.3    71.3    -      -       +      +
     58C  ARG*     1.3    65.8    +      -       -      +
     60C  ASN*     3.2    12.2    +      -       -      +
     61C  LEU*     3.0    35.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 58 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     49C  LEU*     3.6    16.6    -      -       +      +
     52C  THR*     3.5    34.7    +      -       -      +
     53C  LYS*     3.7    13.7    -      -       -      +
     54C  ASP      2.8    24.2    +      -       -      +
     55C  ASN*     3.8    21.4    +      -       -      +
     56C  THR      3.2     0.2    -      -       -      -
     57C  LYS*     1.3    76.2    -      -       -      +
     59C  CYS*     1.3    60.2    -      -       -      +
     62C  ARG      3.7     4.7    +      -       -      -
    183F  MET*     3.5    43.6    -      -       +      +
    184F  GLU*     3.6    29.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with CYS 59 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     55C  ASN      3.5    10.9    +      -       -      +
     56C  THR*     3.2     9.9    +      -       -      +
     57C  LYS      3.2     0.4    -      -       -      -
     58C  ARG*     1.3    77.8    -      -       -      +
     60C  ASN*     1.3    66.5    +      -       -      +
     61C  LEU      3.3     0.4    -      -       -      -
     62C  ARG*     3.5    16.1    +      -       -      +
     63C  GLU*     3.4    27.0    +      -       -      +
    183F  MET*     5.3     2.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 60 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     56C  THR*     3.0    40.1    +      -       -      +
     57C  LYS*     3.2    12.6    +      -       -      +
     59C  CYS*     1.3    78.7    -      -       -      +
     61C  LEU*     1.3    65.9    +      -       +      +
     63C  GLU*     3.4    22.3    +      -       -      +
     64C  LYS*     3.4    14.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 61 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45C  LEU*     4.3    16.6    -      -       +      +
     48C  VAL*     4.0    17.5    -      -       +      -
     49C  LEU*     3.7    48.5    -      -       +      +
     52C  THR*     4.1    12.6    -      -       +      +
     57C  LYS*     3.0    25.4    +      -       +      +
     59C  CYS      3.3     0.2    -      -       -      -
     60C  ASN*     1.3    81.8    -      -       +      +
     62C  ARG*     1.3    59.0    +      -       -      +
     64C  LYS*     3.3    12.3    +      -       +      +
     65C  ILE*     2.8    40.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 62 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     49C  LEU*     4.9     0.2    -      -       -      +
     58C  ARG      3.7     3.7    +      -       -      +
     59C  CYS*     3.5    16.1    +      -       -      +
     60C  ASN      3.3     0.6    -      -       -      -
     61C  LEU*     1.3    78.4    -      -       -      +
     63C  GLU*     1.3    75.5    +      -       -      +
     65C  ILE*     5.0     0.4    -      -       -      -
     66C  SER*     2.7    66.1    +      -       -      -
    183F  MET*     3.6    41.6    -      -       +      +
    187F  LEU*     3.8    29.9    -      -       +      +
    190F  ARG*     5.2     1.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 63 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     59C  CYS*     3.4    24.3    -      -       -      +
     60C  ASN*     3.4    13.2    +      -       -      +
     61C  LEU      3.2     0.2    -      -       -      -
     62C  ARG*     1.3   100.0    +      -       -      +
     64C  LYS*     1.3    63.4    +      -       +      +
     66C  SER*     4.4     2.0    -      -       -      -
     67C  LYS*     3.1    31.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 64 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     16C  ALA*     5.7     6.9    -      -       -      +
     19C  LEU*     5.1     4.0    -      -       -      +
     45C  LEU*     4.2    29.3    -      -       +      +
     60C  ASN*     3.4    13.4    +      -       +      +
     61C  LEU*     3.3    15.8    +      -       +      +
     63C  GLU*     1.3    76.8    -      -       +      +
     65C  ILE*     1.3    63.4    +      -       -      +
     67C  LYS*     3.2    10.1    +      -       -      +
     68C  TYR*     3.0    48.6    +      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 65 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     42C  ILE*     4.2    13.2    -      -       +      +
     45C  LEU*     3.5    48.2    -      -       +      +
     46C  LEU*     4.0     8.1    -      -       +      +
     49C  LEU*     3.9    26.2    -      -       +      -
     61C  LEU*     2.8    27.4    +      -       +      +
     62C  ARG      4.0     2.0    -      -       -      +
     64C  LYS*     1.3    73.0    -      -       -      +
     66C  SER*     1.3    52.5    +      -       -      +
     68C  TYR*     3.3     6.8    +      -       -      +
     69C  MET*     2.7    57.3    +      -       +      +
    187F  LEU*     3.6    20.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 66 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     62C  ARG*     2.7    52.4    +      -       -      -
     63C  GLU*     4.4     1.8    -      -       -      -
     65C  ILE*     1.3    76.5    -      -       -      +
     67C  LYS*     1.3    58.7    +      -       -      +
     69C  MET*     3.7     7.5    -      -       -      +
     70C  ASP*     2.9    37.2    +      -       -      +
    187F  LEU*     4.5     4.3    -      -       -      -
    190F  ARG*     3.2    19.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 67 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63C  GLU*     3.1    24.7    +      -       -      +
     64C  LYS*     3.4    10.0    -      -       -      +
     65C  ILE      3.1     0.2    -      -       -      -
     66C  SER*     1.3    76.0    -      -       -      +
     68C  TYR*     1.3    76.3    +      -       +      +
     70C  ASP*     3.2    17.3    +      -       -      +
     71C  ARG*     3.3    13.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 68 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     19C  LEU*     3.6    42.8    -      -       +      +
     23C  VAL*     4.2    16.3    -      -       +      +
     38C  TYR*     3.7    33.3    -      +       +      -
     42C  ILE*     3.8    19.4    -      -       +      +
     45C  LEU*     4.8     2.9    -      -       +      -
     64C  LYS*     3.0    49.8    +      -       +      +
     65C  ILE*     3.9     3.4    -      -       -      +
     67C  LYS*     1.3    84.6    -      -       +      +
     69C  MET*     1.3    59.6    +      -       -      +
     71C  ARG*     3.4     6.2    +      -       +      +
     72C  ALA*     2.9    31.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 69 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     42C  ILE*     3.6    39.0    -      -       +      +
     65C  ILE*     2.7    33.4    +      -       +      +
     66C  SER*     3.7     7.2    -      -       -      +
     67C  LYS      3.2     0.2    -      -       -      -
     68C  TYR*     1.3    77.4    -      -       -      +
     70C  ASP*     1.3    55.5    -      -       -      +
     72C  ALA*     3.9     1.0    -      -       -      +
     73C  GLU*     3.0    42.3    +      -       -      +
    187F  LEU*     3.3    31.4    -      -       +      +
    190F  ARG*     3.4    51.6    -      -       +      +
    191F  LEU      4.1     1.8    -      -       -      +
    194F  LEU*     4.3     8.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 70 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     66C  SER*     2.9    25.8    +      -       -      +
     67C  LYS*     3.2    10.8    +      -       -      +
     69C  MET*     1.3    77.6    -      -       -      +
     71C  ARG*     1.3    61.4    +      -       -      +
     73C  GLU*     4.0     6.2    -      -       -      +
     74C  ASN*     2.8    37.2    +      -       -      +
    190F  ARG*     2.9    22.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 71 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     26C  ASP*     2.8    42.6    +      -       -      +
     31C  TYR*     3.4    15.4    -      -       -      -
     38C  TYR*     3.7    19.3    -      -       +      +
     67C  LYS      3.3     8.9    +      -       -      +
     68C  TYR*     3.4    10.7    +      -       +      +
     70C  ASP*     1.3    80.4    -      -       -      +
     72C  ALA*     1.3    61.5    +      -       -      +
     74C  ASN*     3.3    12.3    +      -       -      +
     75C  ILE*     3.1    39.8    +      -       -      +
     78C  TYR*     4.6     6.1    -      -       -      -
     88C  TYR*     3.1    30.0    +      -       -      -
     91C  GLN*     3.1    32.9    +      -       -      +
     93C  LYS*     5.9     6.2    -      -       -      +
    239C  ASP*     3.8     2.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 72 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     35C  LEU*     3.3    24.2    -      -       +      +
     38C  TYR*     3.9    21.5    -      -       +      -
     42C  ILE*     4.3     2.5    -      -       +      -
     68C  TYR      2.9    17.7    +      -       -      +
     69C  MET      3.9     2.0    -      -       -      +
     71C  ARG*     1.3    77.1    -      -       -      +
     73C  GLU*     1.3    62.7    +      -       -      +
     75C  ILE*     3.2     3.0    +      -       -      -
     76C  LYS      3.2    17.3    +      -       -      -
    194F  LEU*     3.7    30.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 73 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     69C  MET*     3.0    24.2    +      -       +      +
     70C  ASP*     4.0     5.0    -      -       -      +
     72C  ALA*     1.3    76.6    -      -       -      +
     74C  ASN*     1.3    62.5    +      -       -      +
     76C  LYS*     3.4     4.7    +      -       -      +
     77C  LYS*     3.1    35.7    +      -       +      +
    190F  ARG*     2.9    58.8    +      -       -      +
    193F  ALA*     6.0     1.4    -      -       -      +
    194F  LEU*     3.8    19.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 74 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     70C  ASP*     2.8    27.8    +      -       -      +
     71C  ARG*     3.6    16.5    -      -       -      +
     73C  GLU*     1.3    75.1    -      -       -      +
     75C  ILE*     1.3    60.6    +      -       -      +
     77C  LYS*     3.2    31.6    +      -       -      +
     78C  TYR*     2.9    55.4    +      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 75 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     26C  ASP*     3.8    11.4    -      -       -      +
     31C  TYR*     3.9    29.8    -      -       +      +
     34C  ALA*     4.9     3.8    -      -       +      -
     35C  LEU*     4.2    12.6    -      -       +      -
     38C  TYR*     3.8    21.1    -      -       +      -
     71C  ARG*     3.1    47.9    +      -       -      +
     72C  ALA*     3.2     7.8    +      -       -      +
     74C  ASN*     1.3    75.3    -      -       -      +
     76C  LYS*     1.3    58.8    +      -       -      +
     78C  TYR*     3.3     8.9    +      -       -      +
     79C  LEU*     3.0    48.1    +      -       +      +
     88C  TYR*     4.6     3.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 76 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     35C  LEU*     4.0    18.6    -      -       +      +
     72C  ALA      3.2    12.1    +      -       -      +
     73C  GLU*     3.6    10.1    -      -       -      +
     75C  ILE*     1.3    77.8    -      -       -      +
     77C  LYS*     1.3    63.5    +      -       +      +
     79C  LEU*     3.3     4.3    +      -       -      +
     80C  ASP*     2.8    50.3    +      -       -      +
    193F  ALA      3.5    25.1    -      -       -      +
    194F  LEU*     4.2    18.8    -      -       +      +
    196F  ASN*     2.8    34.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 77 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     73C  GLU*     3.1    21.4    +      -       +      +
     74C  ASN*     3.2    31.7    +      -       -      +
     76C  LYS*     1.3    79.6    -      -       +      +
     78C  TYR*     1.3    62.0    +      -       +      +
     80C  ASP*     3.6     5.4    +      -       -      +
     81C  GLN*     2.9    45.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 78 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     71C  ARG*     4.6     2.0    -      -       -      -
     74C  ASN*     2.9    40.7    +      -       +      +
     75C  ILE*     3.6     5.2    -      -       -      +
     77C  LYS*     1.3    83.5    -      -       +      +
     79C  LEU*     1.3    61.3    +      -       -      +
     81C  GLN*     3.1    28.0    +      -       +      +
     82C  GLU*     3.6     9.2    +      -       -      +
     87C  LYS      5.4     0.2    +      -       -      -
     88C  TYR*     3.3    46.1    +      +       +      -
    206C  LYS*     4.5    23.6    -      -       +      +
    239C  ASP*     3.5    24.4    +      -       +      +
    241C  PHE*     3.5    35.7    -      +       +      -
----------------------------------------------------------
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Residues in contact with LEU 79 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     31C  TYR*     4.5    14.4    -      -       +      -
     32C  PRO*     4.4    30.5    -      -       +      -
     35C  LEU*     4.3    15.5    -      -       +      -
     75C  ILE*     3.0    38.0    +      -       +      +
     76C  LYS*     3.9     4.3    -      -       -      +
     78C  TYR*     1.3    77.8    -      -       +      +
     80C  ASP*     1.3    64.1    +      -       -      +
     82C  GLU*     3.4    37.2    -      -       -      +
     87C  LYS*     6.1     0.9    -      -       -      +
     88C  TYR*     5.0    11.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 80 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     76C  LYS*     2.8    42.3    +      -       -      +
     77C  LYS*     3.9     7.0    -      -       -      +
     78C  TYR      3.2     0.4    -      -       -      -
     79C  LEU*     1.3    79.5    -      -       -      +
     81C  GLN*     1.3    61.1    +      -       -      +
     82C  GLU*     3.0    11.4    +      -       -      +
     83C  LYS*     3.1    33.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 81 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     77C  LYS*     2.9    35.9    +      -       -      +
     78C  TYR*     3.1    19.7    +      -       +      +
     80C  ASP*     1.3    77.9    -      -       -      +
     82C  GLU*     1.3    54.2    +      -       -      +
     83C  LYS*     3.0    31.6    +      -       +      +
     85C  ASP*     2.9    37.5    -      -       -      +
     86C  GLY*     2.9    11.9    +      -       -      -
    206C  LYS*     5.1    12.8    +      -       -      +
    241C  PHE*     5.7     2.5    -      -       +      -
----------------------------------------------------------
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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