Contacts of the helix formed by residues 28 - 50 (chain C) in PDB entry 1FTA


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 GLY 28 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18A  MET*     3.7    19.9    -      -       -      +
     22A  ARG*     4.3     6.1    -      -       -      -
     26C  GLY      3.2     4.2    +      -       -      -
     27C  THR*     1.3    80.2    -      -       -      +
     29C  GLU*     1.3    59.2    +      -       -      +
     30C  LEU      3.5     1.6    -      -       -      -
     31C  THR*     3.8    11.0    -      -       -      -
     32C  GLN*     3.0    35.2    +      -       -      +
    338C  AMP      2.8     4.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 29 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     22A  ARG*     3.8    23.9    +      -       -      +
     27C  THR*     3.6     5.1    -      -       -      +
     28C  GLY*     1.3    74.0    -      -       -      +
     30C  LEU*     1.3    68.7    +      -       -      +
     32C  GLN*     3.2     3.9    +      -       -      +
     33C  LEU      2.9    17.7    +      -       -      -
     89C  PHE      4.3     4.2    -      -       -      +
     90C  ALA*     3.4    31.8    -      -       +      +
    111C  GLY*     4.0     8.2    -      -       -      -
    112C  LYS*     3.0    49.9    +      -       -      +
    113C  TYR*     3.8     3.0    -      -       +      -
    338C  AMP      3.0    16.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 30 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29C  GLU*     1.3    79.9    -      -       -      +
     31C  THR*     1.3    64.3    +      -       -      +
     33C  LEU*     2.9    28.3    +      -       +      +
     34C  LEU*     2.8    35.9    +      -       +      +
    113C  TYR*     3.8    25.8    -      -       +      +
    138C  ILE*     4.1    18.8    -      -       +      -
    160C  VAL*     3.8    23.3    -      -       +      -
    161C  ALA*     5.3     3.4    -      -       +      -
    177C  MET*     5.3     3.8    -      -       -      -
    338C  AMP      3.4    51.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 31 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18A  MET*     3.9    25.6    -      -       +      -
     17C  VAL*     3.9    22.1    +      -       +      +
     18C  MET*     4.2    17.6    -      -       +      +
     21C  GLY*     4.0     6.6    -      -       -      -
     28C  GLY*     3.5    16.4    +      -       -      -
     29C  GLU      3.3     0.6    -      -       -      -
     30C  LEU*     1.3    76.4    -      -       -      +
     32C  GLN*     1.3    57.4    +      -       -      +
     34C  LEU*     3.3     1.9    +      -       -      +
     35C  ASN*     2.9    39.3    +      -       -      +
    338C  AMP      2.9    27.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 32 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     15A  ARG*     3.4    42.4    -      -       -      +
     18A  MET*     3.2    34.0    -      -       +      +
     19A  GLU*     3.8    19.1    -      -       -      +
     22A  ARG*     3.8    15.9    -      -       -      +
     28C  GLY      3.0    21.4    +      -       -      +
     29C  GLU*     3.5     4.9    -      -       -      +
     31C  THR*     1.3    74.4    -      -       -      +
     33C  LEU*     1.3    58.0    +      -       -      +
     35C  ASN*     3.3    12.3    +      -       -      +
     36C  SER*     3.0    32.4    +      -       -      +
     88C  SER*     4.1    19.6    -      -       -      +
     90C  ALA*     5.1     0.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 33 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29C  GLU      2.9    11.1    +      -       -      +
     30C  LEU*     2.9    21.8    +      -       +      +
     32C  GLN*     1.3    76.4    -      -       -      +
     34C  LEU*     1.3    56.3    +      -       -      +
     36C  SER*     3.3     2.3    +      -       -      -
     37C  LEU*     3.0    32.6    +      -       +      +
     85C  LEU*     3.4    26.9    -      -       +      -
     88C  SER*     4.2     9.8    -      -       -      +
     90C  ALA*     3.9     7.6    -      -       +      -
     91C  THR*     4.1     9.0    -      -       +      -
    113C  TYR*     3.5    39.5    -      -       +      -
    115C  VAL*     4.0    15.9    -      -       +      -
    138C  ILE*     4.2    15.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 34 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     13C  LEU*     4.7     5.5    -      -       +      +
     17C  VAL*     3.8    37.2    -      -       +      -
     30C  LEU*     2.8    35.6    +      -       +      +
     31C  THR      3.8     3.8    -      -       -      +
     33C  LEU*     1.3    69.3    -      -       -      +
     35C  ASN*     1.3    66.6    +      -       -      +
     37C  LEU*     3.4    14.9    +      -       +      +
     38C  CYS*     3.0    23.7    +      -       -      +
    136C  PHE*     5.0     1.8    -      -       +      -
    138C  ILE*     3.8    28.5    -      -       +      -
    161C  ALA*     5.1     2.5    -      -       +      -
    175C  LEU*     4.6    19.3    -      -       +      -
    177C  MET*     4.5    20.0    -      -       -      -
    338C  AMP      4.5     3.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 35 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     14A  THR*     4.2    20.5    -      -       +      +
     15A  ARG*     5.5     5.4    -      -       +      -
     18A  MET*     4.1     5.5    -      -       -      +
     13C  LEU*     5.8     2.2    -      -       -      +
     14C  THR*     4.0    31.3    +      -       -      +
     17C  VAL*     4.9     7.1    -      -       -      +
     31C  THR*     2.9    33.5    +      -       -      +
     32C  GLN*     3.6    25.0    +      -       -      +
     34C  LEU*     1.3    77.3    -      -       -      +
     36C  SER*     1.3    61.1    +      -       -      +
     38C  CYS*     3.2    18.0    +      -       -      +
     39C  THR*     3.2    16.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 36 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     15A  ARG*     3.0    27.0    +      -       -      +
     32C  GLN      3.0    15.0    +      -       -      -
     33C  LEU*     3.5     8.7    -      -       -      -
     35C  ASN*     1.3    76.0    -      -       -      +
     37C  LEU*     1.3    62.0    +      -       -      +
     39C  THR*     3.3     3.3    +      -       -      -
     40C  ALA*     3.1    18.2    +      -       -      +
     84C  MET*     3.3    41.4    -      -       -      +
     85C  LEU*     4.5     4.5    -      -       -      -
     88C  SER*     3.2    12.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 37 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     33C  LEU*     3.0    20.8    +      -       +      +
     34C  LEU*     3.7    17.7    -      -       +      +
     35C  ASN      3.3     0.2    -      -       -      -
     36C  SER*     1.3    73.7    -      -       -      +
     38C  CYS*     1.3    67.9    +      -       -      +
     40C  ALA*     3.3     5.9    +      -       +      +
     41C  VAL*     3.0    36.4    +      -       +      +
     81C  VAL*     3.9    28.3    -      -       +      -
     85C  LEU*     4.1    14.8    -      -       +      +
    115C  VAL*     5.6     2.7    -      -       +      -
    117C  PHE*     6.2     0.4    -      -       +      -
    134C  THR*     6.0     2.5    -      -       +      -
    136C  PHE*     3.7    52.0    -      -       +      -
    138C  ILE*     4.6     6.5    -      -       +      -
    173C  LEU*     6.1     1.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with CYS 38 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    192A  GLU*     5.1     1.6    -      -       -      -
     13C  LEU*     3.6    28.9    -      -       +      -
     14C  THR*     4.7    11.9    -      -       -      -
     34C  LEU      3.0    13.9    +      -       -      +
     35C  ASN*     3.3    14.1    -      -       -      +
     37C  LEU*     1.3    76.7    -      -       -      +
     39C  THR*     1.3    62.9    +      -       -      +
     41C  VAL*     3.2     6.0    +      -       -      +
     42C  LYS*     3.1    38.2    +      -       -      +
    173C  LEU*     5.7     3.8    -      -       -      -
    193C  PHE*     3.8    23.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with THR 39 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     12A  THR*     4.2    10.4    +      -       +      +
    190A  ILE*     4.4     1.9    -      -       +      +
    192A  GLU*     2.7    43.8    +      -       +      +
     59B  ILE*     4.0    20.6    -      -       +      -
     35C  ASN      3.2    10.8    +      -       -      -
     36C  SER      3.3     6.9    +      -       -      -
     38C  CYS*     1.3    75.6    -      -       -      +
     40C  ALA*     1.3    64.8    +      -       -      +
     42C  LYS*     3.0     9.2    +      -       -      +
     43C  ALA*     2.9    20.1    +      -       -      +
     84C  MET*     3.8    23.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 40 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     59B  ILE*     6.1     0.2    -      -       -      -
     36C  SER      3.1    14.4    +      -       -      +
     37C  LEU*     3.5    11.7    -      -       +      +
     39C  THR*     1.3    73.7    -      -       -      +
     41C  VAL*     1.3    53.9    +      -       +      +
     43C  ALA*     3.0    11.6    +      -       -      +
     44C  ILE*     2.8    38.0    +      -       -      +
     80C  LEU*     3.9    24.4    -      -       +      +
     81C  VAL*     4.0    23.3    -      -       +      -
     84C  MET*     4.2     9.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 41 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     37C  LEU*     3.0    29.5    +      -       +      +
     38C  CYS*     3.5     5.2    -      -       -      +
     39C  THR      3.1     0.2    -      -       -      -
     40C  ALA*     1.3    74.8    -      -       +      +
     42C  LYS*     1.3    66.4    +      -       -      +
     43C  ALA      3.2     0.3    +      -       -      -
     44C  ILE*     3.2     5.0    +      -       +      +
     45C  SER*     2.9    22.9    +      -       -      -
     81C  VAL*     6.0     0.2    -      -       +      -
    134C  THR*     4.8    13.2    -      -       +      -
    136C  PHE*     5.6     2.7    -      -       +      -
    165C  ALA*     3.8    27.8    -      -       +      -
    167C  TYR*     3.9    19.0    +      -       +      +
    171C  THR*     5.1     1.6    -      -       +      -
    173C  LEU*     4.2    10.5    -      -       +      -
    193C  PHE*     3.6    25.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 42 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     42A  LYS*     4.5     1.6    -      -       -      +
    189A  ALA      4.9     0.9    -      -       -      +
    190A  ILE*     3.3    33.3    +      -       +      +
    191A  GLY      3.5     7.3    +      -       -      -
    192A  GLU*     3.0    29.3    +      -       -      -
     38C  CYS*     3.1    18.6    +      -       -      +
     39C  THR*     3.0    11.7    +      -       -      +
     41C  VAL*     1.3    74.1    -      -       -      +
     43C  ALA*     1.3    61.7    +      -       -      +
     45C  SER*     3.5     8.4    -      -       -      -
     46C  SER*     3.2    22.0    +      -       -      -
    186C  LEU*     4.0    21.3    -      -       +      +
    191C  GLY*     2.9    29.7    +      -       -      +
    193C  PHE*     3.7    24.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 43 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    190A  ILE*     3.8    17.8    -      -       +      +
     55B  HIS*     5.4     7.2    -      -       +      -
     59B  ILE*     4.6    11.0    -      -       +      -
     39C  THR      2.9    12.4    +      -       -      +
     40C  ALA*     3.0    10.1    +      -       -      +
     42C  LYS*     1.3    72.9    -      -       -      +
     44C  ILE*     1.3    65.8    +      -       -      +
     46C  SER*     3.4     5.1    +      -       -      -
     47C  ALA*     3.1    21.0    +      -       -      +
     80C  LEU*     3.6    32.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 44 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     40C  ALA*     2.8    25.7    +      -       +      +
     41C  VAL*     3.2     7.2    +      -       +      +
     43C  ALA*     1.3    70.8    -      -       -      +
     45C  SER*     1.3    64.2    +      -       -      +
     47C  ALA*     3.1     6.1    +      -       +      +
     48C  VAL*     2.8    29.8    +      -       +      +
     77C  SER*     3.2    34.1    -      -       -      +
     80C  LEU*     4.0    15.9    -      -       +      -
     81C  VAL*     3.6    30.7    -      -       +      -
    119C  PRO      4.2     1.6    -      -       -      +
    120C  LEU*     3.6    23.6    -      -       +      -
    134C  THR*     3.9    16.2    -      -       +      +
    167C  TYR*     3.8    11.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 45 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41C  VAL      2.9    17.5    +      -       -      -
     42C  LYS*     3.5    10.1    -      -       -      -
     44C  ILE*     1.3    72.5    -      -       -      +
     46C  SER*     1.3    63.7    +      -       -      +
     48C  VAL*     3.0     6.8    +      -       -      +
     49C  ARG*     2.9    31.8    +      -       -      +
    167C  TYR*     3.7    24.0    -      -       -      -
    171C  THR*     3.2    28.0    +      -       -      +
    186C  LEU*     3.8    11.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 46 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    189A  ALA*     3.1    33.3    +      -       -      +
    190A  ILE*     4.5     6.1    -      -       -      -
     42C  LYS      3.2    10.3    +      -       -      -
     43C  ALA      3.6     8.7    -      -       -      -
     45C  SER*     1.3    76.0    -      -       -      +
     47C  ALA*     1.3    63.4    +      -       -      +
     49C  ARG*     3.1    15.4    +      -       -      +
     50C  LYS      3.4     0.2    +      -       -      -
     51C  ALA*     3.3    32.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 47 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     55B  HIS*     6.4     1.3    -      -       +      -
     43C  ALA      3.1     9.4    +      -       -      +
     44C  ILE*     3.1    13.5    +      -       +      +
     46C  SER*     1.3    78.5    -      -       -      +
     48C  VAL*     1.3    63.4    +      -       +      +
     50C  LYS*     3.2    18.9    +      -       -      +
     51C  ALA      5.1     4.5    -      -       -      +
     73C  LEU*     3.7    29.7    -      -       +      +
     76C  LEU*     3.8    22.0    -      -       +      -
     77C  SER*     5.5     0.9    -      -       -      +
     80C  LEU*     5.4     0.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 48 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     44C  ILE*     2.8    22.7    +      -       +      +
     45C  SER*     3.3     9.4    -      -       -      +
     47C  ALA*     1.3    71.7    -      -       -      +
     49C  ARG*     1.3    58.0    +      -       -      +
     50C  LYS*     2.8    24.2    +      -       -      +
     73C  LEU*     3.9    17.1    -      -       +      +
    120C  LEU*     3.8    29.6    -      -       +      -
    126C  ILE*     4.1     7.1    -      -       +      +
    132C  VAL*     3.6    22.9    -      -       +      -
    167C  TYR*     4.1    12.6    -      -       +      -
    169D  SER*     3.8    26.8    +      -       -      +
    170D  ALA*     3.9     3.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 49 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45C  SER*     2.9    28.4    +      -       -      +
     46C  SER*     3.1     7.8    +      -       -      +
     48C  VAL*     1.3    73.9    -      -       -      +
     50C  LYS*     1.3    68.7    +      -       -      +
     51C  ALA*     3.3     2.9    +      -       +      +
    167C  TYR*     4.0     6.8    -      -       -      +
    168C  GLY      2.7    37.0    +      -       -      +
    170C  ALA*     3.7     7.5    +      -       -      +
    171C  THR*     3.1    30.0    +      -       -      +
    186C  LEU*     5.6     1.8    -      -       -      +
    188C  PRO*     6.1     3.6    -      -       -      +
     49D  ARG*     3.6    41.3    +      -       +      +
    169D  SER*     3.0    21.7    +      -       -      +
    170D  ALA*     4.2     6.8    -      -       -      +
    171D  THR      5.3     0.9    +      -       -      -
    186D  LEU      4.1     1.4    -      -       -      +
    188D  PRO*     3.3    26.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 50 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     47C  ALA      3.2    15.9    +      -       -      +
     48C  VAL      2.8    23.3    +      -       -      +
     49C  ARG*     1.3    79.7    -      -       -      +
     51C  ALA*     1.3    68.3    +      -       -      +
     52C  GLY      3.2     0.3    +      -       -      -
     53C  ILE*     3.1    49.5    +      -       +      +
     73C  LEU*     4.3    21.7    -      -       -      +
    126C  ILE*     5.4     7.4    -      -       +      -
    129C  LEU*     6.2     1.6    -      -       +      -
    170D  ALA*     4.3     8.7    -      -       +      -
    185D  MET*     4.0    35.7    -      -       +      -
    186D  LEU      4.3     2.0    -      -       -      +
    187D  ASP*     4.0     4.7    -      -       -      +
    188D  PRO*     4.3     1.1    -      -       -      -
----------------------------------------------------------
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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