Contacts of the helix formed by residues 87 - 114 (chain C) in PDB entry 4QYL


Residue contacts within the protein are derived with the CSU software (Sobolev V., Sorokine A., Prilusky J., Abola E.E. and Edelman M. (1999) Automated analysis of interatomic contacts in proteins. Bioinformatics, 15, 327-332). A short description of the analytical approach is given at the end of the page.
For CSU analysis of other PDB entry

Note:
Non-standard 3 letter residue codes indicate a heterogroup. To identify and analyse, use LPC software

Legend:
Dist - nearest distance (Å) between atoms of two residues
Surf - contact surface area (Å2) between two residues
HB   - hydrophilic-hydrophilic contact (hydrogen bond)
Arom - aromatic-aromatic contact
Phob - hydrophobic-hydrophobic contact
DC   - hydrophobic-hydrophilic contact (destabilizing contact)
+/-  - indicates presence/absence of a specific contacts
*    - indicates residues forming contacts  by their side chain
       (including CA atoms)
Residues in contact with THR 87 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     83C  ASN*     3.5    11.3    -      -       +      +
     84C  ALA*     2.7    40.2    +      -       +      +
     86C  ASP*     1.3    86.9    -      -       -      +
     88C  ILE*     1.3    65.8    +      -       -      +
     89C  PHE*     3.2     9.8    +      -       +      -
     90C  TYR*     3.2    14.4    +      -       -      +
     91C  ARG*     3.1    23.9    +      -       -      +
      8G  GLY*     3.4    16.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 88 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     27C  ILE*     4.7    10.0    -      -       +      +
     86C  ASP      3.9     0.4    +      -       -      -
     87C  THR*     1.3    72.8    -      -       -      +
     89C  PHE*     1.3    80.1    +      -       +      +
     91C  ARG*     3.7     8.7    -      -       -      +
     92C  ALA*     2.8    30.3    +      -       -      +
      7G  GLY      3.1    23.6    -      -       -      +
      8G  GLY*     2.9    25.9    +      -       -      +
      9G  LYS      4.1    10.5    -      -       -      +
     10G  ALA*     4.1    12.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 89 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     27C  ILE*     3.9    24.7    -      -       +      -
     28C  PHE*     4.3     0.2    -      -       -      -
     79C  CYS*     3.2    17.2    -      -       -      -
     83C  ASN*     3.8    25.8    -      -       -      +
     87C  THR*     3.1     6.8    -      -       +      +
     88C  ILE*     1.3    86.2    -      -       +      +
     90C  TYR*     1.4    65.1    +      -       -      +
     92C  ALA*     3.2     7.0    +      -       -      +
     93C  ALA      3.0    18.4    +      -       -      -
      5G  ALY      3.6    44.4    -      -       +      -
      6G  GLN      3.5    20.6    -      -       -      -
      7G  GLY*     3.9    11.4    -      -       -      -
      8G  GLY*     3.5    25.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 90 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     79C  CYS*     4.5     4.5    -      -       -      -
     80C  LEU*     3.5    45.4    -      -       +      +
     83C  ASN*     3.3    22.8    -      -       +      +
     84C  ALA      3.1    19.1    -      -       -      +
     85C  LYS*     3.6    56.4    +      -       +      +
     87C  THR*     3.2     7.4    +      -       -      +
     89C  PHE*     1.4    76.1    -      -       -      +
     91C  ARG*     1.3    67.4    +      -       +      +
     93C  ALA*     3.1     4.9    +      -       -      +
     94C  VAL*     3.0    36.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 91 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     85C  LYS      4.1    11.9    -      -       -      +
     86C  ASP*     4.3    10.9    +      -       -      +
     87C  THR      3.1    18.8    +      -       -      +
     88C  ILE*     3.8     7.6    -      -       -      +
     90C  TYR*     1.3    80.6    -      -       +      +
     92C  ALA*     1.3    62.4    +      -       -      +
     94C  VAL*     3.3     7.6    +      -       -      +
     95C  ARG*     3.1    35.4    +      -       -      +
    201C  SO4      2.8    45.5    +      -       -      +
     10G  ALA*     3.9    22.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 92 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     23C  ASP*     5.7     0.4    -      -       -      +
     27C  ILE*     3.5    28.3    -      -       +      -
     28C  PHE*     4.0    13.2    -      -       +      -
     88C  ILE      2.8    18.6    +      -       -      +
     89C  PHE      3.2     5.8    +      -       -      +
     91C  ARG*     1.3    78.1    -      -       -      +
     93C  ALA*     1.3    56.4    +      -       -      +
     95C  ARG*     3.4    12.0    +      -       -      +
     96C  LEU*     2.9    28.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 93 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     28C  PHE*     3.8     9.9    -      -       +      -
     76C  VAL*     3.9    11.4    -      -       -      +
     79C  CYS*     3.7    24.7    -      -       +      -
     80C  LEU*     3.7    20.9    -      -       +      -
     89C  PHE      3.0    13.2    +      -       -      +
     90C  TYR      3.1     8.0    +      -       -      +
     92C  ALA*     1.3    73.8    -      -       -      +
     94C  VAL*     1.3    60.3    +      -       -      +
     96C  LEU*     3.6     3.7    -      -       -      +
     97C  ARG*     2.8    31.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 94 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     80C  LEU*     3.8     9.2    -      -       +      -
     90C  TYR*     3.0    37.8    +      -       +      +
     91C  ARG*     3.3    10.3    +      -       -      +
     93C  ALA*     1.3    75.1    -      -       -      +
     95C  ARG*     1.3    62.6    +      -       +      +
     97C  ARG*     3.3    29.3    +      -       -      +
     98C  GLU*     3.1    37.7    +      -       -      +
    201C  SO4      5.9     2.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 95 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     22C  LYS      5.9     1.8    -      -       -      +
     24C  THR*     5.3     6.9    +      -       -      -
     91C  ARG*     3.1    22.6    +      -       -      +
     92C  ALA*     3.6    12.1    -      -       -      +
     93C  ALA      3.3     0.2    -      -       -      -
     94C  VAL*     1.3    79.5    -      -       +      +
     96C  LEU*     1.3    61.4    +      -       -      +
     98C  GLU*     3.4    16.3    +      -       -      +
     99C  GLN*     3.0    48.2    +      -       -      +
    201C  SO4      2.9    42.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 96 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     19C  LEU*     3.9    10.8    -      -       -      +
     22C  LYS*     3.8    28.7    +      -       +      +
     23C  ASP*     4.2    13.0    -      -       +      +
     28C  PHE*     3.5    34.5    -      -       +      -
     50C  PHE*     4.2     8.7    -      -       +      -
     72C  PHE*     3.6    28.1    -      -       +      -
     75C  ILE*     4.2     5.6    -      -       +      -
     76C  VAL*     4.1    11.2    -      -       +      -
     92C  ALA      2.9    17.2    +      -       -      +
     93C  ALA*     3.6     5.4    -      -       -      +
     95C  ARG*     1.3    76.7    -      -       -      +
     97C  ARG*     1.3    59.1    +      -       -      +
     99C  GLN*     4.9     1.8    -      -       -      -
    100C  GLY*     2.8    29.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 97 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     72C  PHE*     4.6     6.5    -      -       +      -
     76C  VAL*     3.7    24.8    -      -       +      +
     80C  LEU*     3.4    24.3    -      -       -      +
     93C  ALA      2.8    18.4    +      -       -      +
     94C  VAL*     3.3    27.9    +      -       -      +
     96C  LEU*     1.3    75.3    -      -       -      +
     98C  GLU*     1.3    64.5    +      -       -      +
    100C  GLY      4.0     0.2    -      -       -      -
    101C  GLY*     3.0    21.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 98 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     94C  VAL*     3.1    28.9    +      -       -      +
     95C  ARG*     3.5    24.7    +      -       -      +
     97C  ARG*     1.3    81.2    -      -       -      +
     99C  GLN*     1.3    70.4    +      -       +      +
    101C  GLY*     3.7     5.4    +      -       -      -
    102C  ALA*     4.0     8.7    +      -       -      +
    201C  SO4      5.3     1.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 99 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     22C  LYS*     3.4    54.4    +      -       +      +
     24C  THR*     5.8     2.5    -      -       -      +
     95C  ARG*     3.0    39.8    +      -       -      +
     98C  GLU*     1.3    82.0    +      -       +      +
    100C  GLY*     1.3    65.5    +      -       -      +
    102C  ALA*     3.4    14.9    +      -       -      +
    103C  VAL*     3.5    14.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 100 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     19C  LEU*     3.7    21.8    -      -       -      -
     22C  LYS*     4.6     4.3    -      -       -      +
     72C  PHE*     3.9     5.8    -      -       -      -
     96C  LEU*     2.8    19.0    +      -       -      -
     99C  GLN*     1.3    75.0    -      -       -      +
    101C  GLY*     1.3    66.7    +      -       -      +
    103C  VAL*     3.1     5.7    +      -       -      +
    104C  LEU*     2.9    31.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 101 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     72C  PHE*     4.8     1.0    -      -       -      -
     97C  ARG      3.0    17.2    +      -       -      -
     98C  GLU*     4.1     3.6    -      -       -      -
     99C  GLN      3.3     0.6    -      -       -      -
    100C  GLY*     1.3    76.9    -      -       -      +
    102C  ALA*     1.3    55.0    +      -       -      +
    104C  LEU*     3.5     8.9    +      -       -      +
    105C  ARG*     3.0    37.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 102 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98C  GLU      4.0     6.6    +      -       -      +
     99C  GLN*     3.4    10.4    +      -       -      +
    100C  GLY      3.2     0.6    -      -       -      -
    101C  GLY*     1.3    74.8    -      -       -      +
    103C  VAL*     1.3    66.3    +      -       +      +
    105C  ARG*     3.4     9.6    +      -       -      +
    106C  GLN*     3.2    23.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 103 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     15C  THR*     4.0     9.0    -      -       +      +
     18C  GLN*     3.6    43.5    -      -       +      +
     19C  LEU*     3.7    23.3    -      -       +      -
     22C  LYS*     3.8    21.8    -      -       +      -
     99C  GLN      3.5    13.4    +      -       -      +
    100C  GLY*     3.1     8.2    +      -       -      +
    102C  ALA*     1.3    78.9    -      -       +      +
    104C  LEU*     1.3    62.0    +      -       -      +
    106C  GLN*     3.5     5.7    +      -       -      +
    107C  ALA*     3.1    22.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 104 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     15C  THR*     4.5     2.0    -      -       +      -
     19C  LEU*     4.2    13.5    -      -       +      -
     65C  PHE*     3.9    27.1    -      -       +      -
     68C  PHE*     4.2    19.5    -      -       +      -
     69C  GLU*     4.0    37.7    -      -       +      +
     72C  PHE*     3.5    34.3    -      -       +      -
     73C  ASN*     4.7     2.2    -      -       -      +
    100C  GLY      2.9    22.2    +      -       -      +
    101C  GLY*     3.9     6.5    -      -       -      +
    103C  VAL*     1.3    70.1    -      -       -      +
    105C  ARG*     1.3    62.0    +      -       +      +
    107C  ALA*     4.5     2.5    -      -       -      -
    108C  ARG*     2.9    32.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 105 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101C  GLY      3.0    23.2    +      -       -      +
    102C  ALA*     3.7     8.3    -      -       -      +
    103C  VAL      3.3     0.2    -      -       -      -
    104C  LEU*     1.3    77.7    -      -       +      +
    106C  GLN*     1.3    62.0    +      -       -      +
    108C  ARG*     3.5     4.7    +      -       -      +
    109C  ARG*     3.3    27.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 106 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     11C  LEU*     5.7     1.2    -      -       -      +
     18C  GLN*     4.8    10.0    +      -       -      +
    102C  ALA      3.2    14.0    +      -       -      +
    103C  VAL*     3.8     5.4    -      -       -      +
    105C  ARG*     1.3    77.3    -      -       -      +
    107C  ALA*     1.3    72.3    +      -       -      +
    109C  ARG*     3.3    26.2    +      -       -      +
    110C  GLN*     3.0    52.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 107 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     11C  LEU*     3.7     8.8    -      -       +      +
     15C  THR*     3.3    35.9    -      -       +      +
     18C  GLN*     5.2     2.2    -      -       -      +
     65C  PHE*     3.7    13.0    -      -       +      -
    103C  VAL      3.1    17.3    +      -       -      +
    106C  GLN*     1.3    82.4    +      -       -      +
    108C  ARG*     1.3    67.0    +      -       -      +
    110C  GLN*     3.1     9.2    +      -       -      +
    111C  ALA*     2.9    21.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 108 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65C  PHE*     3.7    34.7    -      -       +      +
     66C  ASP*     2.8    36.3    +      -       -      +
     69C  GLU*     2.8    31.1    +      -       -      +
    104C  LEU      2.9    19.7    +      -       -      +
    105C  ARG*     3.9     5.6    -      -       -      +
    107C  ALA*     1.3    77.0    -      -       -      +
    109C  ARG*     1.3    58.5    +      -       -      +
    111C  ALA*     3.0     5.0    +      -       +      +
    112C  GLU*     2.9    49.0    +      -       +      +
    117C  ASP*     4.8    11.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 109 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    105C  ARG*     3.3    18.8    +      -       -      +
    106C  GLN*     3.5    32.2    -      -       -      +
    107C  ALA      3.2     0.2    -      -       -      -
    108C  ARG*     1.3    79.8    -      -       -      +
    110C  GLN*     1.3    75.4    +      -       -      +
    112C  GLU*     3.4    16.8    +      -       -      +
    113C  LYS*     3.0    37.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 110 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     11C  LEU*     4.2    17.5    -      -       +      -
    106C  GLN*     3.0    48.2    +      -       -      +
    107C  ALA*     3.1     8.2    +      -       -      +
    109C  ARG*     1.3    97.6    -      -       -      +
    111C  ALA*     1.3    62.5    +      -       -      +
    113C  LYS*     3.3    30.2    +      -       -      +
    114C  MET*     3.1    27.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 111 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8C  PHE*     5.1     2.5    -      -       +      -
     11C  LEU*     3.6    21.9    -      -       +      +
     65C  PHE*     4.0    21.1    -      -       +      -
    107C  ALA      2.9    10.1    +      -       -      +
    108C  ARG*     3.0     9.8    +      -       +      +
    110C  GLN*     1.3    74.6    -      -       -      +
    112C  GLU*     1.3    62.3    +      -       -      +
    114C  MET*     3.2    21.9    -      -       -      +
    115C  GLY      3.2     3.8    +      -       -      -
    116C  ILE      4.4     3.1    -      -       -      +
    117C  ASP*     3.0    28.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 112 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108C  ARG*     2.9    37.9    +      -       +      +
    109C  ARG*     3.6    20.4    +      -       -      +
    111C  ALA*     1.3    79.2    -      -       -      +
    113C  LYS*     1.3    61.3    +      -       +      +
    115C  GLY*     3.1    13.2    +      -       -      +
    117C  ASP*     3.6    29.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 113 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    109C  ARG*     3.0    36.4    +      -       +      +
    110C  GLN*     3.3    30.4    +      -       -      +
    112C  GLU*     1.3    76.5    -      -       +      +
    114C  MET*     1.3    59.0    +      -       -      +
    115C  GLY      3.8     0.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with MET 114 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      7C  PRO*     3.6    32.1    -      -       +      +
      8C  PHE*     3.9    32.3    -      -       -      -
     11C  LEU*     4.0    22.4    -      -       +      -
    110C  GLN*     3.1    12.7    +      -       +      +
    111C  ALA*     3.2    20.9    -      -       -      +
    112C  GLU      3.1     0.2    -      -       -      -
    113C  LYS*     1.3    78.1    -      -       -      +
    115C  GLY*     1.3    67.9    +      -       -      +
    116C  ILE      4.4     0.4    -      -       -      +
----------------------------------------------------------
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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