Contacts of the helix formed by residues 109 - 139 (chain C) in PDB entry 5X11


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 SER 109 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108C  LEU*     1.3    75.7    -      -       -      +
    110C  ARG*     1.3    61.1    +      -       -      +
    111C  GLN*     3.3     6.7    -      -       -      -
    112C  GLU*     3.6    21.1    -      -       -      +
    113C  ALA*     2.8    28.4    +      -       -      +
     81D  HIS*     6.3     0.4    -      -       -      -
    147D  PHE*     4.0     1.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 110 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    109C  SER*     1.3    74.4    -      -       -      +
    111C  GLN*     1.3    57.5    +      -       -      +
    113C  ALA*     3.7     1.7    -      -       -      +
    114C  SER*     3.0    28.6    +      -       -      -
    178C  MET      4.8     3.2    +      -       -      -
    179C  ILE*     2.9    33.7    +      -       +      +
    180C  ASP*     5.3     3.0    +      -       -      +
    146D  SER*     6.0     1.6    -      -       -      -
    147D  PHE*     3.6    55.1    -      -       +      +
    148D  SER*     4.9     7.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 111 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    109C  SER*     3.3     5.9    -      -       -      -
    110C  ARG*     1.3    77.6    -      -       -      +
    112C  GLU*     1.3    58.1    +      -       -      +
    114C  SER*     3.4     7.0    +      -       -      -
    115C  ASP*     3.0    36.1    +      -       -      -
----------------------------------------------------------
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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  LEU*     4.2    18.9    -      -       +      +
    109C  SER*     3.3    29.7    +      -       -      +
    111C  GLN*     1.3    75.1    -      -       -      +
    113C  ALA*     1.3    64.9    +      -       -      +
    115C  ASP*     3.4     6.9    +      -       -      +
    116C  LEU*     3.1    24.1    +      -       -      +
     81D  HIS*     5.6     4.0    -      -       +      -
     85D  ILE*     4.5    13.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 113 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    105C  ILE*     4.0    15.3    -      -       +      -
    108C  LEU*     4.4    11.1    -      -       +      +
    109C  SER      2.8    18.1    +      -       -      +
    110C  ARG      3.7     4.0    -      -       -      +
    112C  GLU*     1.3    72.1    -      -       -      +
    114C  SER*     1.3    60.0    +      -       -      +
    116C  LEU*     3.4     1.1    +      -       -      -
    117C  PHE*     2.9    39.6    +      -       +      +
    179C  ILE*     4.0    14.6    -      -       +      -
    147D  PHE*     3.9    21.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 114 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    110C  ARG      3.0    18.3    +      -       -      -
    111C  GLN*     3.6     9.0    -      -       -      -
    112C  GLU      3.3     0.2    -      -       -      -
    113C  ALA*     1.3    77.3    -      -       -      +
    115C  ASP*     1.3    54.5    +      -       -      +
    118C  THR*     2.7    47.6    +      -       -      -
    176C  LEU*     3.8    18.0    -      -       -      +
    179C  ILE*     4.3     8.0    -      -       -      +
    180C  ASP*     5.0     9.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 115 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    111C  GLN*     3.0    23.6    +      -       -      +
    112C  GLU*     3.9     6.1    -      -       -      +
    113C  ALA      3.4     0.2    -      -       -      -
    114C  SER*     1.3    76.2    -      -       -      +
    116C  LEU*     1.3    62.1    +      -       -      +
    118C  THR*     3.8     5.8    -      -       -      -
    119C  ASP*     3.1    25.6    +      -       -      +
     87D  HIS*     3.8    13.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 116 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98C  PHE*     4.0    15.5    -      -       +      -
    101C  LYS*     3.9    33.7    -      -       +      +
    108C  LEU*     4.2    17.5    -      -       +      -
    112C  GLU      3.1    16.2    +      -       -      +
    113C  ALA*     3.8     2.9    -      -       -      +
    115C  ASP*     1.3    77.2    -      -       -      +
    117C  PHE*     1.3    78.9    +      -       +      +
    119C  ASP*     3.6     2.9    +      -       -      +
    120C  GLN*     3.3    22.1    +      -       -      +
     84D  LEU      3.3    27.8    -      -       -      +
     85D  ILE*     4.9     4.5    -      -       -      -
     86D  ARG      4.2     6.1    -      -       -      +
     87D  HIS*     4.3    17.7    +      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 117 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98C  PHE*     4.0    22.2    -      +       -      -
    101C  LYS      5.8     0.2    -      -       -      -
    102C  ALA*     4.2    21.1    -      -       +      -
    105C  ILE*     4.1    27.6    -      -       +      -
    108C  LEU*     5.9     0.4    -      -       +      -
    113C  ALA*     2.9    29.0    +      -       +      +
    116C  LEU*     1.3    91.7    -      -       +      +
    118C  THR*     1.3    65.2    +      -       -      +
    119C  ASP      3.3     0.2    -      -       -      -
    120C  GLN*     3.4     6.4    +      -       -      +
    121C  LEU*     3.1    22.5    +      -       -      +
    171C  TRP*     4.2    13.0    -      +       -      -
    172C  LEU*     4.0    22.1    -      -       +      +
    175C  ILE*     3.6    32.5    -      -       +      -
    176C  LEU*     3.8    21.6    -      -       +      +
    179C  ILE*     4.2     4.5    -      -       +      -
    156D  LEU*     4.3     3.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 118 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    114C  SER*     2.7    33.9    +      -       -      -
    115C  ASP*     3.8     6.3    -      -       -      +
    117C  PHE*     1.3    73.2    -      -       -      +
    119C  ASP*     1.3    61.6    +      -       -      +
    121C  LEU*     3.3     7.3    +      -       +      +
    122C  LEU*     3.2    33.0    +      -       +      +
    176C  LEU*     3.8    20.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 119 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    115C  ASP      3.1    17.1    +      -       -      +
    116C  LEU      3.9     2.4    -      -       -      +
    118C  THR*     1.3    76.2    -      -       -      +
    120C  GLN*     1.3    67.9    +      -       -      +
    122C  LEU*     3.7     9.8    +      -       -      +
    123C  LYS*     3.3    34.4    +      -       -      +
     87D  HIS*     3.1    52.9    +      -       +      +
     88D  GLN      5.2     2.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 120 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98C  PHE*     3.4    51.0    -      -       +      +
    116C  LEU*     3.3    16.3    +      -       -      +
    117C  PHE      3.8     4.9    -      -       -      +
    118C  THR      3.3     0.4    -      -       -      -
    119C  ASP*     1.3    78.4    +      -       -      +
    121C  LEU*     1.3    65.9    +      -       -      +
    123C  LYS*     3.5     4.3    +      -       -      +
    124C  ARG*     3.0    55.3    +      -       +      +
    168C  TYR*     4.0     2.6    +      -       +      -
    172C  LEU*     3.7    18.4    -      -       +      -
     88D  GLN      4.4    11.3    +      -       -      +
     90D  ILE*     3.3    21.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 121 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    117C  PHE      3.1    13.2    +      -       -      +
    118C  THR*     3.3    11.2    -      -       +      +
    120C  GLN*     1.3    78.1    -      -       -      +
    122C  LEU*     1.3    57.9    +      -       +      +
    124C  ARG*     3.3     1.9    +      -       -      +
    125C  LYS*     2.9    53.6    +      -       +      +
    169C  VAL*     3.7    43.5    -      -       +      +
    172C  LEU*     3.8    18.1    -      -       +      +
    173C  GLU*     4.0    15.0    -      -       +      -
    176C  LEU*     3.9    20.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 122 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    118C  THR*     3.2    24.4    +      -       +      +
    119C  ASP*     4.1    10.3    -      -       -      +
    121C  LEU*     1.3    79.1    -      -       +      +
    123C  LYS*     1.3    59.5    +      -       +      +
    125C  LYS*     3.3    15.8    +      -       +      +
    126C  ALA*     3.0    30.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 123 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    119C  ASP*     3.3    29.2    +      -       -      +
    120C  GLN*     3.8     5.4    -      -       -      +
    121C  LEU      3.3     0.2    -      -       -      -
    122C  LEU*     1.3    79.0    -      -       +      +
    124C  ARG*     1.3    56.6    +      -       -      +
    126C  ALA*     3.5     7.0    +      -       -      +
    127C  LYS*     3.1    26.3    +      -       -      +
     88D  GLN      5.6     1.6    -      -       -      +
     89D  PRO*     5.4     7.0    -      -       +      -
     90D  ILE*     4.3    29.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 124 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     96C  ASP*     4.9     5.1    +      -       -      -
    120C  GLN*     3.0    46.2    +      -       +      +
    121C  LEU      3.6     4.3    -      -       -      +
    123C  LYS*     1.3    73.9    -      -       -      +
    125C  LYS*     1.3    54.9    +      -       -      +
    127C  LYS*     3.2     5.8    +      -       -      +
    128C  LEU*     2.7    35.0    +      -       -      +
    164C  ARG*     5.9     0.6    -      -       -      +
    165C  GLU*     3.4    34.4    +      -       -      +
    168C  TYR*     3.4    46.8    +      -       -      -
    169C  VAL*     3.8    18.1    -      -       +      +
    172C  LEU*     3.9    13.7    -      -       +      -
     90D  ILE*     3.5    32.1    -      -       +      +
     91D  PRO*     4.8     8.9    +      -       -      +
     94D  VAL*     6.2     3.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 125 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121C  LEU*     2.9    47.4    +      -       +      +
    122C  LEU*     3.7    15.8    -      -       +      +
    124C  ARG*     1.3    76.9    -      -       -      +
    126C  ALA*     1.3    57.7    +      -       -      +
    128C  LEU*     3.3    12.5    +      -       +      +
    129C  SER*     3.0    28.6    +      -       -      -
    169C  VAL*     4.1    17.5    -      -       +      -
    173C  GLU*     4.0    20.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 126 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    122C  LEU      3.0    16.3    +      -       -      +
    123C  LYS*     3.6     8.1    -      -       -      +
    124C  ARG      3.2     0.2    -      -       -      -
    125C  LYS*     1.3    74.3    -      -       -      +
    127C  LYS*     1.3    63.5    +      -       -      +
    129C  SER*     3.3     7.2    +      -       -      -
    130C  ASP*     3.1    22.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 127 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    123C  LYS      3.1    14.1    +      -       -      +
    124C  ARG      3.5     7.4    -      -       -      +
    126C  ALA*     1.3    75.6    -      -       -      +
    128C  LEU*     1.3    61.6    +      -       -      +
    130C  ASP*     3.4     7.1    +      -       -      +
    131C  LEU*     3.1    31.3    +      -       +      +
    165C  GLU*     3.9    18.4    -      -       +      +
     90D  ILE*     4.1    14.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 128 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    124C  ARG      2.7    19.0    +      -       -      +
    125C  LYS*     3.5    10.5    -      -       +      +
    126C  ALA      3.3     0.2    -      -       -      -
    127C  LYS*     1.3    74.8    -      -       -      +
    129C  SER*     1.3    57.7    -      -       -      +
    131C  LEU*     3.4     2.9    +      -       +      +
    132C  GLN*     2.8    43.6    +      -       -      +
    162C  LEU*     3.9    31.0    -      -       +      +
    165C  GLU*     4.1    22.8    -      -       +      +
    166C  LYS*     4.0    21.5    -      -       +      -
    169C  VAL*     4.4    22.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 129 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    125C  LYS      3.0    17.2    +      -       -      -
    126C  ALA*     3.3     8.0    +      -       -      -
    128C  LEU*     1.3    73.9    -      -       -      +
    130C  ASP*     1.3    59.4    +      -       -      +
    132C  GLN*     4.2     5.2    -      -       -      +
    133C  GLY*     3.0    24.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 130 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    126C  ALA      3.1    12.6    +      -       -      +
    127C  LYS*     3.6    11.4    -      -       -      +
    129C  SER*     1.3    75.7    -      -       -      +
    131C  LEU*     1.3    58.6    +      -       +      +
    133C  GLY*     3.4     1.8    +      -       -      -
    134C  SER*     2.9    29.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 131 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     32C  GLN*     4.0    30.1    -      -       +      +
    127C  LYS*     3.1    18.3    +      -       +      +
    128C  LEU*     3.8     3.8    -      -       -      +
    130C  ASP*     1.3    77.4    -      -       +      +
    132C  GLN*     1.3    59.5    +      -       -      +
    134C  SER*     3.3     7.8    +      -       -      -
    135C  TYR*     2.8    27.5    +      -       -      +
    158C  LEU*     4.4    23.8    -      -       +      +
    161C  ALA*     3.3    39.0    -      -       +      +
    162C  LEU*     4.1    13.0    -      -       +      +
    165C  GLU*     3.7    19.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 132 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128C  LEU*     2.8    39.2    +      -       +      +
    129C  SER*     4.2     5.2    -      -       -      +
    131C  LEU*     1.3    72.3    -      -       -      +
    133C  GLY*     1.3    57.3    +      -       -      +
    135C  TYR*     3.1    14.4    +      -       +      +
    136C  GLU*     3.0    48.3    +      -       +      +
    162C  LEU*     4.3    21.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 133 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    129C  SER      3.0    17.7    +      -       -      -
    130C  ASP      3.8     1.3    -      -       -      -
    132C  GLN*     1.3    74.8    -      -       -      +
    134C  SER*     1.3    61.4    +      -       -      +
    136C  GLU*     3.3    14.2    +      -       -      +
    137C  LYS*     3.3    21.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 134 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    130C  ASP      2.9    18.2    +      -       -      -
    131C  LEU*     3.4    11.9    -      -       -      -
    133C  GLY*     1.3    76.3    -      -       -      +
    135C  TYR*     1.3    60.0    +      -       -      +
    137C  LYS*     3.6     7.2    +      -       -      +
    138C  LEU*     3.3    16.6    +      -       -      +
    158C  LEU*     3.8    23.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 135 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    131C  LEU      2.8    13.9    +      -       -      +
    132C  GLN*     3.1    16.6    +      -       +      +
    134C  SER*     1.3    73.4    -      -       -      +
    136C  GLU*     1.3    68.5    +      -       +      +
    137C  LYS      3.1     1.8    -      -       -      -
    138C  LEU*     3.1     6.9    +      -       +      +
    139C  MET*     3.0    40.8    +      -       +      +
    155C  TYR*     4.1    34.8    +      +       -      -
    158C  LEU*     4.1    23.3    -      -       +      +
    159C  THR*     4.4    10.7    -      -       +      +
    162C  LEU*     3.9    25.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 136 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132C  GLN*     3.0    44.8    +      -       -      +
    133C  GLY*     3.3    10.0    +      -       -      +
    135C  TYR*     1.3    85.9    -      -       +      +
    137C  LYS*     1.3    60.0    +      -       -      +
    139C  MET*     3.6    21.0    -      -       -      +
    140C  ALA*     4.8     1.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 137 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133C  GLY      3.3    11.6    +      -       -      +
    134C  SER*     3.8    11.4    -      -       -      +
    135C  TYR      3.1     0.4    -      -       -      -
    136C  GLU*     1.3    76.0    -      -       -      +
    138C  LEU*     1.3    62.8    +      -       -      +
    140C  ALA*     3.6    16.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 138 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    134C  SER      3.3    11.1    +      -       -      +
    135C  TYR*     3.1    10.1    +      -       +      +
    137C  LYS*     1.3    75.4    -      -       -      +
    139C  MET*     1.3    53.0    +      -       -      +
    140C  ALA      2.6    27.1    +      -       -      +
    145C  MET*     5.3     7.7    -      -       +      +
    151C  ASP*     3.8    27.4    -      -       +      +
    154C  HIS*     3.6    44.2    -      -       +      +
    155C  TYR*     3.9    27.6    -      -       +      +
    158C  LEU*     3.9    14.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 139 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    135C  TYR*     3.0    32.1    +      -       +      +
    136C  GLU*     3.6    14.7    -      -       -      +
    137C  LYS      3.3     0.6    -      -       -      -
    138C  LEU*     1.3    73.8    -      -       -      +
    140C  ALA*     1.3    59.6    +      -       -      +
    145C  MET*     6.6     0.2    -      -       -      -
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


   I  Hydrophilic      - N and O that can donate and accept hydrogen bonds
                         (e.g., oxygen of hydroxyl group of Ser. or Thr)
  II  Acceptor         - N or O that can only accept a hydrogen bond
 III  Donor            - N that can only donate a hydrogen bond
  IV  Hydrophobic      - Cl, Br, I and all C atoms that are not in
                         aromatic rings and do not have a covalent bond to
                         a N or O atom
   V  Aromatic         - C in aromatic rings irrespective of any other 
                         bonds formed by the atom
  VI  Neutral          - C atoms that have a covalent bond to at least one
                         atom of class I or two or more atoms from class II
                         or III; atoms; S, F, P, and metal atoms in all cases
 VII  Neutral-donor    - C atoms that have a covalent bond with only one
                         atom of class III
VIII  Neutral-acceptor - C atoms that have a covalent bond with only 
                         one atom of class II
For each pair of contacts the state of legitimacy is shown below:

Legend:
+, legitimate
-, illegitimate
------------------------------------------------------------
  Atomic class           I  II  III   IV   V   VI  VII  VIII
------------------------------------------------------------
   I  (Hydrophilic)      +   +    +    -   +   +    +    +
  II  (Acceptor)         +   -    +    -   +   +    +    -
 III  (Donor)            +   +    -    -   +   +    -    +
  IV  (Hydrophobic)      -   -    -    +   +   +    +    +
   V  (Aromatic)         +   +    +    +   +   +    +    +
  VI  (Neutral)          +   +    +    +   +   +    +    +
 VII  (Neutral-donor)    +   +    -    +   +   +    -    +
VIII  (Neutral-acceptor) +   -    +    +   +   +    +    -
------------------------------------------------------------
Warning!
Atom classes for heterogroups are automatically assigned based on the atomic coordinates. However, in three cases (see below) the automatic assignment is currently ambiguous. In these cases, the user is advised to manually analyse the full list of contacts using LPC software.
1. Carbon atoms belonging to a 4-, 5- or 6-member ring are 
   considered "aromatic" (Class V) if the ring is approximately
   planar, and "hydrophobic" (Class IV) or "neutral" (Classes
   VI, VII, VIII) if the ring is non-planar.
2. The oxygen atom of a carbonyl or hydroxy group is considered
   "hydroxy" (Class I) if the CO bond is longer than 1.29 Å, and
   "carbonyl" (Class II) if shorter.
3. All nitrogen atoms are considered "hydrophilic" (Class I).

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