Contacts of the helix formed by residues 116 - 143 (chain B) in PDB entry 2Q7M


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 LYS 116 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    113B  ILE*     3.2    41.4    -      -       +      +
    114B  PHE      2.3    24.0    +      -       -      +
    115B  GLY*     1.3    65.0    -      -       -      -
    117B  ARG*     1.3    58.1    +      -       +      +
    119B  ILE*     2.8    22.8    -      -       -      +
    120B  LEU*     2.9    21.3    +      -       -      +
     31C  GLU*     6.0     1.0    -      -       -      +
    501C  2CS      3.1    68.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 117 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    115B  GLY*     2.9     3.0    +      -       -      +
    116B  LYS*     1.3    80.3    -      -       +      +
    118B  ILE*     1.3    56.7    +      -       -      +
    120B  LEU*     3.3     8.6    -      -       +      +
    121B  PHE*     2.8    31.9    +      -       -      +
    138F  PHE*     3.5    31.9    +      -       -      +
    139F  PHE*     3.8    26.3    -      -       +      -
    141F  SER*     3.7    24.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 118 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     67B  PHE*     4.9     0.4    -      -       +      -
     86B  ALA*     2.8    37.0    -      -       +      +
     89B  MET*     3.0    17.3    -      -       +      -
     90B  TYR*     2.9    53.4    -      -       +      +
     93B  VAL*     4.5     6.5    -      -       +      -
    115B  GLY*     2.8    15.7    +      -       -      +
    117B  ARG*     1.3    72.4    -      -       -      +
    119B  ILE*     1.3    64.7    +      -       +      +
    121B  PHE*     2.9    10.7    +      -       +      +
    122B  LEU*     2.8    41.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 119 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     66B  THR      4.4     4.9    -      -       -      +
     67B  PHE*     4.1    20.4    -      -       +      -
     70B  VAL*     3.9    24.8    -      -       +      +
     90B  TYR*     4.2    14.1    -      -       +      -
    115B  GLY      2.8    33.2    -      -       -      +
    116B  LYS*     2.8    27.6    -      -       -      +
    118B  ILE*     1.3    87.6    -      -       +      +
    120B  LEU*     1.3    61.5    +      -       -      +
    122B  LEU*     3.8     1.2    -      -       -      +
    123B  PHE*     2.8    27.3    +      -       -      +
    501C  2CS      3.0    44.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 120 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    116B  LYS      2.9    21.9    +      -       -      +
    117B  ARG*     3.3     6.7    -      -       +      +
    119B  ILE*     1.3    79.8    -      -       -      +
    121B  PHE*     1.3    66.6    +      -       -      +
    123B  PHE*     3.2     3.0    +      -       +      +
    124B  LEU*     3.0    51.9    +      -       +      +
    501C  2CS      3.1    49.6    -      -       +      +
    139F  PHE*     3.3    22.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 121 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     82B  PRO*     4.3    13.0    -      -       +      -
     86B  ALA*     3.0    37.2    -      -       +      -
    117B  ARG      2.8    12.3    +      -       -      +
    118B  ILE*     2.9    10.3    +      -       +      +
    120B  LEU*     1.3    74.6    -      -       -      +
    122B  LEU*     1.3    64.5    +      -       +      +
    124B  LEU*     2.6    31.0    +      -       +      +
    125B  MET*     3.1    41.3    +      -       +      -
    135F  LEU*     5.7     4.7    -      -       +      -
    139F  PHE*     3.0    47.8    -      +       +      -
----------------------------------------------------------
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Residues in contact with LEU 122 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     67B  PHE*     4.7     4.3    -      -       +      -
     70B  VAL*     3.4    36.8    -      -       +      +
     71B  LEU*     4.1     6.1    -      -       -      -
     74B  ALA*     2.8    26.9    -      -       +      +
     83B  ALA*     3.7    14.8    -      -       +      +
     86B  ALA*     3.9    16.2    -      -       +      -
     87B  GLY*     4.1    13.9    -      -       -      +
    118B  ILE*     2.8    37.0    +      -       +      +
    121B  PHE*     1.3    81.9    -      -       +      +
    123B  PHE*     1.3    62.3    +      -       -      +
    125B  MET*     3.0    37.5    +      -       +      -
    126B  SER*     3.1     2.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 123 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     70B  VAL*     3.8    15.9    -      -       +      +
    119B  ILE      2.8    18.9    +      -       -      +
    120B  LEU      3.2     4.5    -      -       -      +
    122B  LEU*     1.3    76.4    -      -       -      +
    124B  LEU*     1.3    77.0    +      -       +      +
    126B  SER*     3.6     4.6    -      -       -      -
    127B  VAL*     3.0    34.0    +      -       +      +
     17C  LEU*     3.3    31.1    -      -       +      +
     20C  VAL*     3.4    20.0    -      -       +      -
     21C  VAL*     3.2    28.3    -      -       +      -
    501C  2CS      3.7    22.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 124 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    120B  LEU*     3.0    48.2    +      -       +      +
    121B  PHE*     2.6    21.0    +      -       +      +
    123B  PHE*     1.3    99.4    -      -       +      +
    125B  MET*     1.3    58.5    +      -       -      -
    127B  VAL*     2.9    27.8    -      -       +      +
    128B  ALA*     2.9    15.1    +      -       -      +
    131F  PHE*     4.8     5.1    -      -       +      -
    135F  LEU*     4.3    28.0    -      -       +      +
    139F  PHE*     4.3     5.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 125 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     74B  ALA*     2.9    35.9    -      -       +      +
     77B  LEU      3.7     0.2    -      -       -      +
     78B  CYS*     3.2    25.3    -      -       +      +
     79B  SER*     4.6     3.1    -      -       -      -
     82B  PRO*     3.6    20.9    -      -       -      -
     83B  ALA*     3.0    23.6    -      -       +      -
    121B  PHE*     3.2    41.1    -      -       +      +
    122B  LEU*     3.0    23.3    +      -       +      -
    124B  LEU*     1.3    74.7    -      -       -      +
    126B  SER*     1.3    63.5    +      -       -      +
    128B  ALA*     3.0    23.2    +      -       -      +
    129B  GLY      3.1     7.4    +      -       -      -
    135F  LEU*     5.9     2.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 126 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     70B  VAL*     4.0     3.6    +      -       -      -
     73B  SER*     2.8    30.3    -      -       -      -
     74B  ALA*     2.7    29.0    +      -       -      +
     77B  LEU*     4.1     2.7    -      -       -      +
    122B  LEU      3.1     7.5    +      -       -      -
    123B  PHE*     3.6    12.3    -      -       -      -
    125B  MET*     1.3    74.0    -      -       -      +
    127B  VAL*     1.3    61.5    +      -       -      +
    128B  ALA      3.0     4.0    -      -       -      -
    130B  ILE*     3.0    31.4    +      -       -      +
     17C  LEU*     4.0    17.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 127 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    123B  PHE*     3.0    22.8    +      -       +      +
    124B  LEU*     2.9    52.5    -      -       +      +
    126B  SER*     1.3    76.4    -      -       -      +
    128B  ALA*     1.3    63.2    +      -       -      +
    130B  ILE*     4.1    10.3    -      -       +      +
    131B  PHE*     3.5    17.5    +      -       +      +
     17C  LEU*     4.9     5.3    -      -       +      +
    131F  PHE*     5.6     4.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 128 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     78B  CYS*     4.6     7.9    -      -       -      -
    124B  LEU      2.9    17.2    +      -       -      +
    125B  MET*     3.0    15.0    -      -       -      +
    126B  SER      3.0     1.0    -      -       -      -
    127B  VAL*     1.3    76.1    -      -       -      +
    129B  GLY*     1.3    61.2    +      -       -      +
    131B  PHE*     2.8    28.1    +      -       -      +
    132B  ASN*     2.8    14.3    +      -       -      +
    131F  PHE*     4.9    17.0    -      -       +      -
    135F  LEU*     5.7     1.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 129 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     77B  LEU*     2.9    25.5    +      -       -      -
     78B  CYS*     4.5     1.9    -      -       -      +
    125B  MET      3.1     6.5    +      -       -      -
    128B  ALA*     1.3    78.6    -      -       -      +
    130B  ILE*     1.3    54.4    +      -       -      +
    132B  ASN*     3.4    14.6    -      -       -      +
    133B  TYR*     2.7    37.0    +      -       -      +
      6C  VAL*     6.1     0.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 130 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     77B  LEU*     3.1    29.9    +      -       +      +
    126B  SER      3.0    17.7    +      -       -      +
    127B  VAL*     4.1    11.2    -      -       +      +
    129B  GLY*     1.3    75.6    -      -       -      +
    131B  PHE*     1.3    63.1    +      -       +      +
    133B  TYR*     3.9     6.1    -      -       -      +
    134B  TYR*     3.9    22.5    -      -       +      -
      6C  VAL*     6.3     0.2    -      -       -      -
     10C  VAL*     3.5    19.9    -      -       +      +
     13C  ALA*     3.6    14.4    -      -       +      -
     14C  ILE*     3.0    43.3    -      -       +      +
     17C  LEU*     3.9     9.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 131 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    127B  VAL*     3.5    11.6    +      -       +      +
    128B  ALA*     2.8    15.6    +      -       -      +
    130B  ILE*     1.3    80.8    -      -       +      +
    132B  ASN*     1.3    75.6    +      -       +      -
    133B  TYR      2.7     4.7    +      -       -      -
    134B  TYR*     2.6    40.0    +      -       +      +
    135B  LEU*     3.4    29.1    +      -       +      -
    124F  LEU*     4.7    19.5    -      -       +      -
    127F  VAL*     5.9     2.7    -      -       +      -
    128F  ALA*     4.7    17.3    -      -       +      -
    131F  PHE*     5.8    10.8    -      +       -      -
----------------------------------------------------------
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Residues in contact with ASN 132 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128B  ALA      2.8    15.2    +      -       -      +
    129B  GLY*     3.4    14.4    -      -       -      +
    131B  PHE*     1.3    96.2    -      -       +      +
    133B  TYR*     1.3    65.1    +      -       -      +
    135B  LEU*     3.3     9.3    +      -       -      +
    136B  ILE*     3.0    40.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 133 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    129B  GLY      2.7    16.9    +      -       -      +
    130B  ILE*     3.9     5.4    -      -       -      +
    131B  PHE      2.7     1.0    +      -       -      -
    132B  ASN*     1.3    80.6    +      -       -      +
    134B  TYR*     1.3    96.3    +      +       -      +
    135B  LEU      3.0     2.2    -      -       -      -
    136B  ILE*     3.2     8.3    +      -       +      -
    137B  PHE*     2.9    40.7    +      +       +      +
      3C  GLN*     3.1    55.7    +      -       -      -
      6C  VAL*     3.9    20.0    -      -       +      -
      7C  GLY*     2.9    28.5    -      -       -      -
     10C  VAL*     3.9    14.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 134 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    130B  ILE*     3.9    10.8    -      -       +      -
    131B  PHE*     2.6    20.5    +      -       +      +
    133B  TYR*     1.3   105.7    -      +       -      +
    135B  LEU*     1.3    62.8    +      -       +      +
    137B  PHE*     3.4    14.7    -      +       -      +
    138B  PHE*     3.2    37.7    +      +       +      +
     10C  VAL*     3.1    31.2    -      -       +      +
     11C  LEU*     4.2     7.6    -      -       -      +
     14C  ILE*     4.5     7.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 135 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    131B  PHE*     3.4    26.0    +      -       +      -
    132B  ASN*     3.3    16.8    +      -       -      +
    133B  TYR      3.0     0.4    -      -       -      -
    134B  TYR*     1.3    80.2    -      -       +      +
    136B  ILE*     1.3    56.1    +      -       +      +
    137B  PHE      2.8     5.4    +      -       -      -
    138B  PHE*     2.8    23.2    +      -       +      -
    139B  PHE*     3.3    33.8    +      -       +      +
    140B  GLY*     3.1    12.7    +      -       -      -
    121F  PHE*     3.7    21.3    -      -       +      -
    124F  LEU*     4.2    29.4    -      -       +      +
    125F  MET*     5.8     0.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 136 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132B  ASN*     3.0    48.4    +      -       -      +
    133B  TYR*     3.2     8.7    +      -       -      +
    135B  LEU*     1.3    76.0    -      -       +      +
    137B  PHE*     1.3    57.5    +      -       -      +
    140B  GLY*     3.2    27.2    -      -       -      -
    141B  SER*     3.7     1.2    +      -       -      -
      3C  GLN*     3.4    35.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 137 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133B  TYR*     2.9    41.6    +      +       +      +
    134B  TYR*     3.4    15.5    -      +       -      +
    135B  LEU      2.8     0.8    +      -       -      -
    136B  ILE*     1.3    80.9    -      -       -      +
    138B  PHE*     1.3    93.9    +      +       -      +
    141B  SER*     3.7    15.2    +      -       -      -
      3C  GLN*     3.6    12.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 138 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    134B  TYR*     3.2    23.2    +      +       +      +
    135B  LEU*     2.8     9.7    +      -       +      -
    137B  PHE*     1.3   123.1    -      +       +      +
    139B  PHE*     1.3    76.0    +      +       +      +
    140B  GLY      2.6    14.6    +      -       -      -
    141B  SER*     2.7    25.0    +      -       -      -
    142B  ASP*     3.7     4.5    +      -       -      +
    117F  ARG*     4.6    14.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 139 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    135B  LEU*     3.3    21.2    +      -       +      -
    138B  PHE*     1.3    85.5    -      +       +      +
    140B  GLY*     1.3    57.2    +      -       -      +
    141B  SER      4.4     4.6    -      -       -      +
    142B  ASP*     4.8     6.9    -      -       -      +
    143B  PHE*     5.0     5.9    +      -       -      +
    117F  ARG*     3.8    44.0    -      -       +      -
    120F  LEU*     3.0    38.6    -      -       +      -
    121F  PHE*     3.0    62.8    -      +       +      -
    124F  LEU*     3.6    11.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 140 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    135B  LEU      3.1     5.6    +      -       -      -
    136B  ILE*     3.2    28.7    -      -       -      -
    138B  PHE      2.6     7.9    +      -       -      -
    139B  PHE*     1.3    72.8    -      -       -      +
    141B  SER*     1.3    63.4    +      -       -      +
    143B  PHE*     4.4    10.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 141 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    136B  ILE      3.7     3.9    +      -       -      -
    137B  PHE      3.7    13.5    +      -       -      -
    138B  PHE*     2.7    10.9    +      -       -      -
    139B  PHE      4.4     0.2    -      -       -      +
    140B  GLY*     1.3    81.0    -      -       -      +
    142B  ASP*     1.3    93.5    +      -       -      +
    143B  PHE*     2.6    26.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 142 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    138B  PHE*     3.9     7.4    -      -       -      +
    139B  PHE*     4.8     5.8    -      -       -      -
    141B  SER*     1.3    87.1    +      -       -      +
    143B  PHE*     1.3    61.2    +      -       -      +
    144B  GLU*     2.3    43.8    +      -       -      +
     89F  MET*     5.9     1.3    -      -       +      -
    117F  ARG*     2.3    52.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 143 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    139B  PHE      5.0     6.8    +      -       -      +
    140B  GLY      4.4     8.7    -      -       -      +
    141B  SER*     2.6    27.4    +      -       -      +
    142B  ASP*     1.3    89.9    -      -       -      +
    144B  GLU*     1.3    71.1    +      -       -      +
    145B  ASN*     3.3    33.9    +      -       -      +
     85F  PHE*     4.1    27.8    -      +       +      -
     89F  MET*     4.6    10.8    -      -       -      +
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


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

Legend:
+, legitimate
-, illegitimate
------------------------------------------------------------
  Atomic class           I  II  III   IV   V   VI  VII  VIII
------------------------------------------------------------
   I  (Hydrophilic)      +   +    +    -   +   +    +    +
  II  (Acceptor)         +   -    +    -   +   +    +    -
 III  (Donor)            +   +    -    -   +   +    -    +
  IV  (Hydrophobic)      -   -    -    +   +   +    +    +
   V  (Aromatic)         +   +    +    +   +   +    +    +
  VI  (Neutral)          +   +    +    +   +   +    +    +
 VII  (Neutral-donor)    +   +    -    +   +   +    -    +
VIII  (Neutral-acceptor) +   -    +    +   +   +    +    -
------------------------------------------------------------
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