Contacts of the helix formed by residues 88 - 110 (chain C) in PDB entry 4QI1


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 TRP 88 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     71C  PHE*     4.0    26.0    -      +       -      -
     72C  GLY*     2.9    36.4    +      -       -      -
     73C  LEU      3.9     3.5    -      -       -      +
     74C  THR*     3.5    35.9    -      -       +      +
     86C  VAL*     3.2    17.0    +      -       +      -
     87C  TYR*     1.3    68.0    -      -       -      +
     89C  ALA*     1.3    73.7    +      -       +      +
     90C  ARG      3.1     2.2    -      -       -      -
     91C  TYR*     3.0    24.9    +      -       -      +
     92C  ALA*     3.6    13.2    +      -       +      +
    131C  LEU*     4.4    17.2    -      -       +      +
    135C  LEU*     4.8     9.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 89 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63C  SER*     3.2    13.1    +      -       -      +
     66C  SER*     4.0    13.0    -      -       -      +
     67C  MET*     3.7    25.8    -      -       +      -
     71C  PHE*     5.5     1.6    -      -       +      -
     72C  GLY*     3.3    19.6    +      -       -      -
     87C  TYR      3.3     0.8    -      -       -      -
     88C  TRP*     1.3    88.1    -      -       +      +
     90C  ARG*     1.3    60.4    +      -       -      +
     92C  ALA*     3.3    10.3    +      -       +      +
     93C  ASP      3.1    18.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 90 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     20C  LEU*     4.5     6.5    -      -       -      +
     63C  SER*     4.4     2.5    -      -       -      -
     64C  TYR*     3.3    29.9    +      -       -      -
     67C  MET*     3.9    19.6    -      -       +      +
     87C  TYR*     3.5    28.7    +      -       -      +
     88C  TRP      3.1     0.2    -      -       -      -
     89C  ALA*     1.3    78.2    -      -       -      +
     91C  TYR*     1.3    67.0    +      -       +      +
     93C  ASP*     3.4     8.4    -      -       -      +
     94C  TRP*     2.9    63.0    +      -       +      +
    202C  GLU*     6.2     0.2    -      -       -      -
    212C  GLU*     5.3     4.0    +      -       -      -
    213C  THR*     3.7    40.6    +      -       -      +
    216C  PHE*     3.6    29.2    -      -       -      +
    220C  ASP*     3.8     5.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 91 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     87C  TYR      4.4     5.8    -      -       -      -
     88C  TRP*     3.0    17.0    +      -       -      +
     90C  ARG*     1.3    88.2    -      -       +      +
     92C  ALA*     1.3    61.6    +      -       -      +
     94C  TRP*     4.0    22.9    -      +       -      -
     95C  LEU*     2.8    31.4    +      -       -      +
    127C  ILE*     3.8    16.9    -      -       +      +
    130C  GLY      3.5    20.8    +      -       -      -
    131C  LEU*     3.5    38.4    -      -       +      -
    134C  THR*     2.6    39.3    +      -       +      +
    197C  TRP*     3.6    16.3    -      -       -      -
    202C  GLU*     4.9     3.1    +      -       -      -
    216C  PHE*     6.0     0.9    -      -       -      -
    301C  RET      3.8    14.6    -      -       +      +
----------------------------------------------------------
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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
----------------------------------------------------------
    304A  MPG      5.9     7.4    -      -       +      -
     88C  TRP*     3.6     9.8    +      -       +      +
     89C  ALA*     3.3    17.0    +      -       +      +
     91C  TYR*     1.3    81.5    -      -       -      +
     93C  ASP*     1.3    64.4    +      -       -      +
     95C  LEU*     3.2    11.1    +      -       -      +
     96C  PHE*     3.2    25.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 93 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    304A  MPG      6.0     2.6    -      -       -      +
     59C  ILE*     4.2    11.4    -      -       +      -
     60C  ALA*     3.4    31.3    -      -       -      +
     63C  SER*     3.5    27.2    +      -       -      +
     64C  TYR*     4.5     9.4    -      -       -      -
     67C  MET*     5.7     0.3    -      -       -      +
     89C  ALA      3.1     2.0    +      -       -      -
     90C  ARG*     3.4    10.3    -      -       -      +
     92C  ALA*     1.3    77.3    -      -       -      +
     94C  TRP*     1.3    69.0    +      -       -      +
     96C  PHE*     3.1     5.5    +      -       -      +
     97C  THR*     2.9    50.4    +      -       -      +
    220C  ASP*     5.0     0.3    -      -       -      +
    224C  LYS*     3.9     7.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with TRP 94 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     90C  ARG*     2.9    49.2    +      -       +      +
     91C  TYR*     3.9    32.1    -      +       -      +
     92C  ALA      3.3     0.2    -      -       -      -
     93C  ASP*     1.3    82.3    +      -       -      +
     95C  LEU*     1.3    64.8    +      -       -      +
     97C  THR*     3.6     4.5    -      -       -      -
     98C  THR*     2.6    36.2    +      -       +      -
    127C  ILE*     3.9    16.2    -      -       +      -
    193C  TYR*     3.5    24.0    -      +       -      -
    216C  PHE*     3.8    28.7    -      +       -      -
    220C  ASP*     3.4    23.1    +      -       -      -
    224C  LYS*     4.0     0.7    -      -       -      -
    301C  RET      3.3    61.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 95 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     96B  PHE*     6.4     2.5    -      -       +      -
     91C  TYR      2.8    18.7    +      -       -      +
     92C  ALA*     3.4    10.1    -      -       -      +
     93C  ASP      3.2     0.4    -      -       -      -
     94C  TRP*     1.3    78.1    -      -       -      +
     96C  PHE*     1.3    81.1    +      -       +      +
     99C  PRO*     3.0    21.5    -      -       -      +
    123C  ASP*     5.0     0.2    -      -       -      +
    124C  ALA*     4.4    15.9    -      -       +      +
    127C  ILE*     4.0    23.7    -      -       +      +
    128C  VAL*     4.0    23.1    -      -       +      -
    302C  MPG      4.3     3.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 96 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     95A  LEU*     6.4     0.2    -      -       +      -
    128A  VAL*     6.2     1.6    -      -       +      -
    302A  MPG      3.6    36.3    -      -       -      -
    304A  MPG      3.9    40.8    -      -       +      -
     59C  ILE*     4.5     6.5    -      -       +      -
     92C  ALA*     3.2    27.6    -      -       +      -
     93C  ASP      3.1     4.5    +      -       -      +
     95C  LEU*     1.3   103.8    -      -       +      +
     97C  THR*     1.3    63.4    +      -       -      +
     98C  THR      3.5     0.7    -      -       -      -
     99C  PRO*     3.5     4.3    -      -       -      +
    100C  LEU*     3.3    28.5    +      -       -      +
    302C  MPG      3.3    26.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with THR 97 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     56C  ILE*     3.7    32.4    -      -       +      +
     59C  ILE*     3.6    23.3    -      -       +      -
     93C  ASP*     2.9    39.1    +      -       -      +
     94C  TRP*     3.6     5.5    -      -       -      -
     96C  PHE*     1.3    75.3    -      -       -      +
     98C  THR*     1.3    60.6    +      -       -      +
    100C  LEU*     3.3     7.6    +      -       -      +
    101C  LEU*     2.8    34.1    +      -       -      +
    224C  LYS*     3.2    20.9    +      -       -      +
    301C  RET      3.9     0.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 98 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     94C  TRP*     2.6    26.2    +      -       +      +
     97C  THR*     1.3    78.6    -      -       -      +
     99C  PRO*     1.4    62.5    -      -       -      +
    101C  LEU*     3.3     5.8    +      -       -      +
    102C  LEU*     3.0    28.9    +      -       -      +
    123C  ASP*     2.7    33.9    +      -       -      -
    127C  ILE*     3.7     7.6    -      -       +      +
    190C  TRP*     3.7    10.0    -      -       +      -
    301C  RET      3.5    50.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with PRO 99 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     94C  TRP      3.5     0.2    -      -       -      +
     95C  LEU      3.0    28.7    -      -       -      +
     96C  PHE      3.5     4.9    -      -       -      +
     98C  THR*     1.4    94.8    -      -       -      +
    100C  LEU*     1.3    54.5    +      -       -      +
    102C  LEU*     3.2     8.1    +      -       +      +
    103C  LEU*     2.8    28.6    +      -       -      +
    120C  VAL*     3.9    29.3    -      -       +      +
    123C  ASP*     3.4    10.3    -      -       +      +
    124C  ALA*     5.6     3.4    -      -       +      +
    302C  MPG      3.5    35.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 100 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    304A  MPG      3.8    48.0    -      -       +      -
     52C  ILE*     3.5    21.8    -      -       +      +
     55C  LEU*     3.8    23.6    -      -       +      -
     56C  ILE*     3.7    24.7    -      -       +      -
     59C  ILE*     3.9    14.8    -      -       +      -
     96C  PHE      3.3    16.7    +      -       -      +
     97C  THR*     3.3     8.1    +      -       -      +
     99C  PRO*     1.3    78.4    -      -       -      +
    101C  LEU*     1.3    57.1    +      -       -      +
    103C  LEU*     3.3     9.7    +      -       +      +
    104C  ASP*     2.9    24.8    +      -       -      +
    302C  MPG      4.3     8.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 101 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     56C  ILE*     3.8    24.0    -      -       +      -
     97C  THR      2.8    26.4    +      -       -      +
     98C  THR      3.6     4.5    -      -       -      +
    100C  LEU*     1.3    71.7    -      -       -      +
    102C  LEU*     1.3    59.5    +      -       -      +
    104C  ASP*     3.3     4.8    +      -       -      +
    105C  ILE*     3.1    29.0    +      -       -      +
    186C  ILE*     5.4     1.8    -      -       +      -
    190C  TRP*     4.1    16.4    -      -       +      +
    223C  ALA      3.5    26.9    -      -       -      +
    224C  LYS*     4.3     5.4    -      -       +      +
    227C  PHE*     3.6    33.9    -      -       +      -
    301C  RET      3.8    37.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 102 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98C  THR      3.0    18.8    +      -       -      +
     99C  PRO*     3.6     8.7    -      -       +      +
    101C  LEU*     1.3    74.2    -      -       -      +
    103C  LEU*     1.3    59.2    +      -       -      +
    105C  ILE*     3.5     7.6    -      -       +      +
    106C  GLY*     2.8    27.5    +      -       -      -
    116C  ILE*     4.7     4.1    -      -       +      +
    119C  LEU*     3.9    37.7    -      -       +      +
    120C  VAL*     4.5     7.2    -      -       +      -
    123C  ASP*     3.6    35.9    -      -       +      +
    156C  LEU*     4.4    12.6    -      -       +      -
    160C  LEU*     4.8     3.8    -      -       +      -
    164C  PHE*     3.7     7.6    -      -       +      -
    186C  ILE*     4.7    13.2    -      -       +      -
    190C  TRP*     3.9    20.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 103 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    304A  MPG      4.9    11.4    -      -       +      -
     48C  GLU*     5.1     3.1    -      -       -      +
     52C  ILE*     3.8    22.0    -      -       +      -
     99C  PRO      2.8    16.4    +      -       -      +
    100C  LEU*     3.6    14.1    -      -       +      +
    102C  LEU*     1.3    75.3    -      -       -      +
    104C  ASP*     1.3    59.4    +      -       -      +
    107C  LEU*     2.8    63.9    +      -       +      +
    116C  ILE*     4.3    15.1    -      -       +      +
    302C  MPG      4.0    48.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 104 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     49C  PHE*     3.4    31.3    -      -       -      +
     52C  ILE*     3.5    29.6    -      -       -      +
     53C  THR*     2.7    31.2    +      -       -      +
     56C  ILE*     4.0     6.6    -      -       -      +
    100C  LEU      2.9    11.1    +      -       -      +
    101C  LEU*     3.3     9.6    +      -       -      +
    103C  LEU*     1.3    76.8    -      -       -      +
    105C  ILE*     1.3    63.0    +      -       -      +
    107C  LEU      3.4     0.2    +      -       -      -
    108C  LEU*     3.1    18.9    +      -       -      +
    227C  PHE*     3.9    16.6    -      -       +      -
    231C  LEU*     3.4    16.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 105 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101C  LEU      3.1    13.6    +      -       -      +
    102C  LEU*     3.5    13.7    -      -       -      +
    104C  ASP*     1.3    77.0    -      -       -      +
    106C  GLY*     1.3    62.9    +      -       -      +
    108C  LEU*     3.3     5.9    +      -       +      +
    109C  ALA*     2.9    27.2    +      -       -      +
    160C  LEU*     4.1    11.0    -      -       +      -
    164C  PHE*     3.9    15.0    -      -       +      -
    179C  PHE*     3.7    31.2    -      -       +      -
    182C  LEU*     3.8    23.3    -      -       +      -
    183C  ARG*     3.7    29.6    -      -       -      +
    186C  ILE*     4.1    14.6    -      -       +      -
    227C  PHE*     4.2    10.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 106 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    102C  LEU      2.8    19.5    +      -       -      -
    103C  LEU      3.8     0.4    -      -       -      -
    105C  ILE*     1.3    78.3    -      -       -      +
    107C  LEU*     1.3    57.7    +      -       -      +
    109C  ALA*     3.3     1.2    +      -       -      -
    110C  GLY      3.0    22.5    +      -       -      -
    111C  ALA*     3.0    14.5    +      -       -      +
    116C  ILE*     4.0    14.4    -      -       -      +
    164C  PHE*     3.6    22.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 107 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45C  ARG*     3.3    17.8    +      -       -      +
     48C  GLU*     3.6    30.5    -      -       +      +
     49C  PHE*     3.8    17.5    -      -       +      -
     52C  ILE*     3.6    31.0    -      -       +      -
    103C  LEU*     2.8    35.7    +      -       +      +
    104C  ASP      3.8     3.4    -      -       -      +
    106C  GLY*     1.3    76.1    -      -       -      +
    108C  LEU*     1.3    63.3    +      -       -      +
    110C  GLY*     3.3    12.0    +      -       -      -
    111C  ALA      5.7     0.9    -      -       -      +
    116C  ILE*     4.2     2.4    -      -       +      +
    302C  MPG      4.3    26.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 108 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45C  ARG*     4.6     6.9    +      -       -      +
     49C  PHE*     3.6    10.6    -      -       +      -
    104C  ASP      3.1    13.4    +      -       -      +
    105C  ILE*     3.5     8.5    -      -       +      +
    107C  LEU*     1.3    78.7    -      -       -      +
    109C  ALA*     1.3    60.7    +      -       -      +
    110C  GLY      3.3     1.2    +      -       -      -
    175C  THR*     3.4    26.7    -      -       +      +
    178C  THR*     3.7     5.4    -      -       +      -
    179C  PHE*     3.6    39.9    -      -       +      +
    182C  LEU*     3.7    23.1    -      -       +      -
    231C  LEU*     4.5     4.9    -      -       +      -
    236C  ALA*     4.1    26.9    -      -       +      +
    237C  ILE*     4.2    18.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 109 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    105C  ILE      2.9    17.2    +      -       -      +
    106C  GLY*     3.3     5.3    +      -       -      +
    108C  LEU*     1.3    76.6    -      -       -      +
    110C  GLY*     1.3    60.9    +      -       -      +
    111C  ALA      4.3     2.9    -      -       -      +
    164C  PHE*     3.7    30.1    -      -       +      +
    167C  ALA*     3.3    25.2    -      -       +      +
    168C  VAL*     3.3    15.4    +      -       +      -
    179C  PHE*     3.9    18.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 110 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45C  ARG*     6.0     0.2    -      -       -      -
    106C  GLY      3.0     4.5    +      -       -      -
    107C  LEU*     3.3     8.6    +      -       -      -
    108C  LEU      3.2     5.8    +      -       -      -
    109C  ALA*     1.3    78.7    -      -       -      +
    111C  ALA*     1.3    65.3    +      -       -      +
    112C  SER      3.8     0.5    +      -       -      -
    167C  ALA*     4.0     7.9    -      -       -      +
----------------------------------------------------------
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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