Contacts of the helix formed by residues 111 - 134 (chain P) in PDB entry 5A31


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 111 (chain P).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     79P  GLU*     3.7    29.4    +      -       -      +
     80P  ASP*     3.8    13.0    +      -       -      -
     83P  ASP*     3.2    25.5    +      -       -      -
    109P  CYS      3.6     0.4    -      -       -      -
    110P  ASN*     1.3    79.4    -      -       -      +
    112P  LYS*     1.3    61.9    +      -       -      +
    113P  LYS*     3.4    15.1    +      -       -      +
    114P  ALA*     3.7     8.7    -      -       -      +
    115P  TYR*     2.8    28.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 112 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46P  ARG*     5.5     3.1    -      -       -      +
     79P  GLU*     4.0    14.9    +      -       -      +
    110P  ASN      3.6     3.8    +      -       -      +
    111P  SER*     1.3    74.6    +      -       -      +
    113P  LYS*     1.3    62.5    +      -       -      +
    115P  TYR*     3.4     6.5    +      -       +      +
    116P  PHE*     3.1    23.4    +      -       -      +
    166P  GLU*     3.4    29.9    +      -       -      +
    167P  LEU*     5.5     0.9    -      -       -      -
    168P  ASP*     4.6    24.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 113 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45P  GLU*     2.9    37.4    +      -       -      +
     46P  ARG*     3.9    34.8    -      -       -      +
     80P  ASP*     5.4    15.1    -      -       -      +
     87P  TYR*     3.1    53.0    -      -       +      +
    111P  SER*     3.4     9.6    +      -       -      +
    112P  LYS*     1.3    78.7    -      -       +      +
    114P  ALA*     1.3    63.2    +      -       -      +
    116P  PHE*     3.4     6.0    +      -       -      +
    117P  LEU*     3.1    22.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 114 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     83P  ASP*     3.8    12.3    -      -       +      +
     87P  TYR*     4.2    16.4    -      -       +      -
    106P  LEU*     3.9    16.0    -      -       +      +
    109P  CYS*     3.7    28.0    -      -       +      -
    111P  SER*     3.3    11.9    +      -       -      +
    113P  LYS*     1.3    78.0    -      -       -      +
    115P  TYR*     1.3    60.7    +      -       -      +
    117P  LEU*     3.2     2.5    +      -       -      +
    118P  TYR*     2.8    31.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 115 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    109P  CYS      4.9    13.2    +      -       -      +
    110P  ASN*     5.3     3.4    -      -       -      +
    111P  SER      2.8    17.6    +      -       -      +
    112P  LYS*     3.6     8.5    -      -       +      +
    114P  ALA*     1.3    76.4    -      -       -      +
    116P  PHE*     1.3    68.4    +      -       -      +
    118P  TYR*     3.4    22.9    -      +       -      +
    119P  MET*     3.0    50.1    +      -       +      +
    157P  GLU*     4.6     5.6    +      -       -      +
    158P  LEU*     4.3    13.4    -      -       +      +
    161P  LEU*     2.7    42.0    -      -       +      +
    167P  LEU*     4.7    13.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 116 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46P  ARG*     3.6    42.0    -      -       +      +
     48P  LEU*     3.6    30.5    -      -       +      -
    112P  LYS      3.1    11.2    +      -       -      +
    113P  LYS*     3.6     9.4    -      -       -      +
    115P  TYR*     1.3    84.4    -      -       -      +
    117P  LEU*     1.3    62.6    +      -       -      +
    119P  MET*     3.1     5.1    +      -       +      +
    120P  TYR*     2.8    48.0    +      +       +      +
    170P  PHE*     3.7    28.9    -      -       +      -
    171P  GLY*     3.8    15.7    -      -       -      +
    173P  TYR*     5.0     2.5    -      +       -      -
    174P  LEU*     3.6    28.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 117 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46P  ARG*     4.1    16.8    -      -       -      +
     87P  TYR*     3.8    28.3    -      -       +      +
     90P  ALA      5.1     0.2    -      -       -      +
     91P  LYS*     3.9    32.5    -      -       +      +
     94P  PHE*     3.5    32.8    -      -       +      -
    102P  ALA*     4.9     2.5    -      -       +      -
    106P  LEU*     3.7    20.0    -      -       +      -
    113P  LYS      3.1    11.6    +      -       -      +
    114P  ALA      3.2     6.0    +      -       -      +
    116P  PHE*     1.3    85.0    -      -       +      +
    118P  TYR*     1.3    57.1    +      -       -      +
    120P  TYR*     4.5     2.7    -      -       -      -
    121P  SER*     2.8    31.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 118 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    103P  ALA*     3.4    30.5    -      -       +      -
    106P  LEU*     3.5    26.0    -      -       +      +
    107P  HIS*     4.2    34.4    +      +       +      -
    114P  ALA      2.8    17.3    +      -       -      +
    115P  TYR*     3.4    26.2    -      +       -      +
    117P  LEU*     1.3    72.3    -      -       -      +
    119P  MET*     1.3    74.0    +      -       -      +
    121P  SER*     2.7    20.5    +      -       -      -
    122P  ARG*     2.9    50.2    +      -       -      +
    157P  GLU*     4.3     7.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with MET 119 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    115P  TYR*     3.0    36.9    +      -       +      +
    116P  PHE*     3.1     5.6    +      -       +      +
    118P  TYR*     1.3    89.7    -      -       -      +
    120P  TYR*     1.3    60.4    +      -       -      +
    122P  ARG*     3.1    36.6    +      -       -      +
    123P  TYR*     2.9    27.2    +      -       -      +
    154P  LEU*     4.1    13.8    -      -       +      +
    157P  GLU*     3.5    33.9    -      -       +      +
    158P  LEU*     3.8    28.5    -      -       +      -
    174P  LEU*     4.0    15.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 120 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      1M  MET      3.7    26.6    +      -       -      -
      2M  ASP*     4.7     7.6    -      -       +      -
     46P  ARG      4.3     3.6    -      -       -      -
     47P  GLY      3.9     9.3    +      -       -      -
     48P  LEU*     3.6    26.2    -      -       +      -
     49P  LEU*     5.7     1.9    +      -       -      +
     94P  PHE*     3.8    20.6    -      +       -      -
    116P  PHE*     2.8    41.7    +      +       +      +
    117P  LEU*     4.0     2.7    -      -       -      +
    119P  MET*     1.3    73.4    -      -       -      +
    121P  SER*     1.3    56.2    +      -       -      +
    123P  TYR*     3.1    22.6    +      +       -      +
    124P  LEU*     2.9    61.8    +      -       +      +
    173P  TYR*     5.3     6.3    -      +       -      -
    174P  LEU*     3.6    23.0    -      -       +      +
    177P  VAL*     6.6     0.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 121 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     94P  PHE*     4.0    25.8    -      -       -      -
     99P  TYR*     3.5    29.5    -      -       -      +
    102P  ALA*     4.6     0.7    -      -       -      -
    103P  ALA*     3.3    19.6    -      -       -      +
    117P  LEU*     2.8    23.3    +      -       -      +
    118P  TYR*     2.7    22.3    +      -       -      -
    120P  TYR*     1.3    73.2    -      -       -      +
    122P  ARG*     1.3    61.5    +      -       -      +
    124P  LEU      3.2     0.7    +      -       -      +
    125P  SER*     3.0    21.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 122 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    248J  LYS*     5.0     9.5    -      -       -      +
    103P  ALA*     4.7     9.0    -      -       +      -
    118P  TYR*     2.9    38.2    +      -       -      +
    119P  MET*     3.2    45.0    -      -       -      +
    121P  SER*     1.3    83.8    +      -       -      +
    123P  TYR*     1.3    59.5    +      -       -      +
    125P  SER*     2.8    23.7    +      -       -      +
    126P  GLY*     3.3     6.6    +      -       -      -
    153P  GLU*     4.1    29.7    +      -       -      +
    154P  LEU*     3.8    20.7    -      -       +      +
    157P  GLU*     3.3    26.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 123 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      2M  ASP*     3.3    38.7    +      -       +      +
    119P  MET      2.9    12.9    +      -       -      +
    120P  TYR*     3.3    23.3    -      +       -      +
    122P  ARG*     1.3    73.6    -      -       -      +
    124P  LEU*     1.3    82.5    +      -       +      +
    126P  GLY*     3.2     3.7    +      -       -      -
    127P  GLU*     2.9    53.8    +      -       +      +
    151P  LEU*     3.6    27.3    -      -       +      +
    154P  LEU*     3.6    15.0    -      -       +      +
    174P  LEU*     4.4     7.6    -      -       +      -
    177P  VAL*     3.6    18.0    -      -       +      +
    178P  VAL*     3.9     8.1    -      -       +      -
    181P  LYS*     3.5    15.8    +      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 124 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      1M  MET      5.4     0.7    -      -       -      +
      2M  ASP      5.1     0.7    -      -       -      +
      5M  VAL*     3.8    41.6    -      -       +      +
     94P  PHE*     3.9     4.7    -      -       +      -
     99P  TYR*     3.8    41.5    -      -       +      +
    120P  TYR*     2.9    63.1    +      -       +      +
    121P  SER      3.9     0.4    -      -       -      +
    123P  TYR*     1.3    89.2    -      -       +      +
    125P  SER*     1.3    67.1    +      -       -      +
    127P  GLU*     2.9    14.2    +      -       -      +
    128P  LYS*     2.9    15.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 125 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99P  TYR*     4.0    12.5    -      -       -      +
    100P  ASP*     3.4    36.6    +      -       -      +
    121P  SER      3.0    13.6    +      -       -      -
    122P  ARG*     2.8    25.6    +      -       -      +
    124P  LEU*     1.3    77.5    -      -       -      +
    126P  GLY*     1.3    60.6    +      -       -      +
    128P  LYS*     3.6     5.2    +      -       -      +
    129P  LYS*     3.2    36.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 126 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    122P  ARG      3.3     5.1    +      -       -      -
    123P  TYR*     3.2     7.6    +      -       -      -
    124P  LEU      3.1     1.2    -      -       -      -
    125P  SER*     1.3    84.4    +      -       -      +
    127P  GLU*     1.3    57.3    +      -       -      +
    129P  LYS*     3.5    11.1    +      -       -      +
    130P  LYS*     3.0    26.7    +      -       -      +
    150P  ALA*     4.6    21.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 127 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      5M  VAL*     4.3    22.7    -      -       +      -
    123P  TYR*     2.9    57.4    +      -       +      +
    124P  LEU*     2.9     8.8    +      -       -      +
    126P  GLY*     1.3    75.4    -      -       -      +
    128P  LYS*     1.3    65.4    +      -       -      +
    130P  LYS*     3.2    24.9    +      -       -      +
    131P  ASP*     3.0    29.9    +      -       -      +
    151P  LEU*     4.3    10.2    -      -       -      +
    181P  LYS*     3.6    23.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 128 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    326C  ILE      6.1     0.4    -      -       -      +
    327C  ASP*     6.2     0.2    -      -       -      +
      5M  VAL*     3.7    27.0    -      -       +      +
      6M  GLN*     4.2    16.0    +      -       -      +
      7M  ARG*     4.3    18.4    -      -       -      +
     97P  LYS*     5.1    10.4    -      -       -      +
     99P  TYR*     4.3    22.4    -      -       +      -
    100P  ASP*     6.1     0.4    -      -       -      +
    124P  LEU      2.9    12.9    +      -       -      +
    125P  SER*     3.7     9.9    -      -       -      +
    126P  GLY      3.4     0.2    -      -       -      -
    127P  GLU*     1.3    74.8    -      -       -      +
    129P  LYS*     1.3    59.9    +      -       +      +
    131P  ASP*     3.2     8.7    +      -       -      +
    132P  ASP*     2.9    45.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 129 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    325C  GLU*     3.6    32.7    +      -       +      +
    326C  ILE      5.1     4.3    -      -       -      +
    328C  LYS*     5.5     0.3    +      -       -      -
    100P  ASP*     4.0    18.5    +      -       -      +
    125P  SER*     3.2    25.8    +      -       -      +
    126P  GLY*     3.7     9.6    -      -       -      +
    127P  GLU      3.2     0.2    -      -       -      -
    128P  LYS*     1.3    77.6    -      -       +      +
    130P  LYS*     1.3    67.2    +      -       -      +
    132P  ASP*     3.4     6.6    +      -       -      +
    133P  GLU*     2.9    25.6    +      -       -      +
    150P  ALA*     5.8     5.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 130 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    126P  GLY      3.0    17.1    +      -       -      +
    127P  GLU*     3.2    23.7    +      -       -      +
    129P  LYS*     1.3    77.4    -      -       -      +
    131P  ASP*     1.3    78.7    +      -       -      +
    133P  GLU*     3.2    15.2    +      -       -      +
    134P  THR*     3.0    36.2    +      -       -      +
    147P  LYS      5.9     5.2    -      -       -      +
    151P  LEU*     6.5     0.9    -      -       +      -
    181P  LYS*     5.0    11.0    -      -       -      +
    362P  PRO*     4.5    18.4    -      -       -      +
    363P  ARG*     5.8     5.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 131 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      5M  VAL      4.8     5.9    -      -       -      +
      6M  GLN*     5.1     0.3    -      -       -      -
      7M  ARG*     3.1    58.9    +      -       +      +
     20M  ARG*     3.5     3.1    +      -       -      -
    127P  GLU*     3.0    20.7    +      -       -      +
    128P  LYS*     3.8    10.4    +      -       -      +
    130P  LYS*     1.3    99.3    +      -       -      +
    132P  ASP*     1.3    63.5    +      -       -      +
    134P  THR*     3.5    10.5    +      -       -      -
    359P  LYS      4.9     1.2    -      -       -      +
    360P  LEU      4.9     3.3    -      -       -      +
    361P  ASN      4.5     4.3    -      -       -      +
    362P  PRO*     4.3    19.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 132 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    326C  ILE      5.8     0.5    -      -       -      +
    327C  ASP*     6.0     0.5    -      -       -      -
    328C  LYS*     4.0    25.9    +      -       -      +
    329C  TYR*     3.4    36.6    -      -       +      -
      7M  ARG*     5.2     3.5    -      -       -      +
     11M  ILE*     5.7     1.4    -      -       -      +
     20M  ARG*     3.5    31.8    +      -       -      +
    128P  LYS*     2.9    35.3    +      -       -      +
    129P  LYS*     3.9     6.8    -      -       -      +
    131P  ASP*     1.3    77.8    -      -       -      +
    133P  GLU*     1.3    64.7    +      -       -      +
    134P  THR      3.4     4.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 133 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    328C  LYS*     4.3    10.0    -      -       -      +
     20M  ARG      5.1     3.9    -      -       -      +
     21M  GLU*     5.3     3.5    -      -       -      +
     23M  LYS*     5.8     9.7    +      -       -      -
    129P  LYS      2.9    17.1    +      -       -      +
    130P  LYS*     3.5    13.3    -      -       -      +
    132P  ASP*     1.3    75.8    -      -       -      +
    134P  THR*     1.3    64.1    +      -       -      +
    147P  LYS*     4.9    22.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 134 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      7M  ARG*     4.5    11.2    -      -       -      +
     17M  ASP*     4.5     4.3    -      -       -      +
     20M  ARG*     4.5    12.1    -      -       -      -
     21M  GLU*     3.2    27.4    -      -       -      +
    130P  LYS*     3.0    26.3    +      -       -      +
    131P  ASP*     3.8    15.3    -      -       -      -
    132P  ASP      3.3     7.7    -      -       -      -
    133P  GLU*     1.3    82.0    -      -       -      +
----------------------------------------------------------
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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