Contacts of the helix formed by residues 82 - 107 (chain B) in PDB entry 1T0R


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 VAL 82 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     70A  TYR*     5.6     2.7    -      -       -      +
    139A  GLN*     2.9    27.1    -      -       +      +
     27B  GLU*     4.3    18.4    -      -       -      +
     28B  TYR*     3.8    34.3    -      -       +      +
     31B  VAL*     3.8    16.8    -      -       +      -
     32B  SER*     4.3     1.1    -      -       -      +
     80B  GLN      4.1     3.6    -      -       -      +
     81B  LEU*     1.3    80.0    -      -       -      +
     83B  TYR*     1.3    65.2    +      -       -      +
     84B  ARG*     3.1    16.6    -      -       +      +
     85B  THR*     3.0    13.2    +      -       +      +
     86B  TYR*     2.8    20.4    +      -       -      +
    157B  TYR*     3.5    10.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 83 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     58A  TYR*     2.8    23.1    +      +       -      -
     62A  GLN*     2.9    33.2    +      -       +      +
     66A  ASP*     3.3    20.2    -      -       -      -
    132A  MET*     3.1    48.5    -      -       +      -
    133A  ASP*     4.4     0.2    +      -       -      -
    135A  ASN*     3.1    21.1    -      -       -      +
    136A  ARG*     3.6    34.3    -      -       +      -
    139A  GLN*     2.9    17.0    -      -       -      +
     82B  VAL*     1.3    71.0    -      -       -      +
     84B  ARG*     1.3    62.3    +      -       -      +
     86B  TYR*     3.3     2.8    +      -       -      +
     87B  ASN*     3.1    41.2    +      -       -      +
    157B  TYR*     3.1     9.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 84 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63A  ARG*     6.0     0.5    -      -       -      -
     66A  ASP*     3.7    28.5    -      -       +      +
     70A  TYR*     3.8    36.6    -      -       +      +
     27B  GLU*     3.1    35.8    +      -       -      +
     82B  VAL*     3.1    11.6    -      -       +      +
     83B  TYR*     1.3    82.8    -      -       -      +
     85B  THR*     1.3    75.7    +      -       +      +
     87B  ASN*     3.7     4.5    +      -       -      +
     88B  LEU*     3.5    44.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 85 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     27B  GLU*     4.4     9.6    -      -       -      +
     80B  GLN      4.2     3.8    +      -       -      +
     81B  LEU*     3.9    13.2    -      -       -      +
     82B  VAL*     3.0    26.2    +      -       +      +
     84B  ARG*     1.3   104.2    -      -       -      +
     86B  TYR*     1.3    65.1    +      -       -      +
     88B  LEU*     3.7    11.3    -      -       +      +
     89B  LEU*     3.2    24.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 86 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     55A  TYR*     2.8    28.5    +      +       -      -
     59A  VAL*     4.7     0.7    -      -       +      -
    132A  MET*     3.7    26.5    -      -       +      -
     81B  LEU*     3.9    22.2    -      -       +      -
     82B  VAL      2.8    17.4    +      -       -      +
     83B  TYR*     3.3     4.9    +      -       -      +
     85B  THR*     1.3    79.0    +      -       -      +
     87B  ASN*     1.3    70.6    +      -       -      +
     89B  LEU*     3.9     2.5    -      -       +      +
     90B  GLN*     3.0    42.2    +      -       +      +
    157B  TYR*     3.7    39.7    -      +       +      -
    160B  ALA*     3.3    18.1    -      -       +      +
    161B  ASP*     2.6    32.8    +      -       -      -
    263B  ARG*     4.3     5.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 87 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     58A  TYR*     4.5     8.7    -      -       -      -
     59A  VAL*     3.6    44.1    -      -       -      +
     62A  GLN*     3.7     7.0    -      -       -      +
     63A  ARG*     4.2    12.3    -      -       -      -
    132A  MET*     4.8     1.0    -      -       -      +
     83B  TYR*     3.1    48.0    +      -       -      +
     84B  ARG*     3.7     4.9    +      -       -      +
     86B  TYR*     1.3    89.6    -      -       -      +
     88B  LEU*     1.3    58.6    +      -       -      +
     91B  ASP*     2.8    34.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 88 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63A  ARG*     3.5    44.9    +      -       +      +
     67A  SER*     5.5     3.1    -      -       -      +
     84B  ARG*     3.5    36.6    +      -       +      +
     85B  THR*     3.7    15.0    -      -       +      +
     86B  TYR      3.3     0.4    -      -       -      -
     87B  ASN*     1.3    76.7    -      -       -      +
     89B  LEU*     1.3    67.3    +      -       -      +
     91B  ASP*     3.8     3.7    -      -       -      +
     92B  GLY*     3.0    18.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 89 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     79B  ASP*     6.0     0.7    -      -       -      +
     81B  LEU*     4.5    18.2    -      -       +      -
     85B  THR      3.2    13.3    +      -       -      +
     86B  TYR*     3.9     4.3    -      -       +      +
     88B  LEU*     1.3    78.9    -      -       -      +
     90B  GLN*     1.3    74.6    +      -       +      +
     92B  GLY*     3.0     6.1    +      -       -      -
     93B  GLN*     3.0    40.2    +      -       +      +
    259B  ARG*     6.1     0.7    -      -       -      +
    263B  ARG*     4.1    30.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 90 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     55A  TYR*     3.1    26.0    +      -       +      +
     59A  VAL*     4.3    11.7    -      -       +      -
     86B  TYR*     3.0    35.2    +      -       +      +
     87B  ASN      4.4     0.2    -      -       -      +
     89B  LEU*     1.3    92.4    -      -       +      +
     91B  ASP*     1.3    56.8    +      -       -      +
     92B  GLY      2.9     2.2    -      -       -      -
     93B  GLN*     3.1    11.7    +      -       -      +
     94B  GLU*     2.7    38.4    +      -       -      +
    161B  ASP*     3.0    25.0    +      -       -      -
    164B  ARG*     3.7    15.8    -      -       -      +
    260B  ASP*     3.2    18.4    +      -       -      +
    263B  ARG*     3.9     5.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 91 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     56A  PRO      4.7     0.2    -      -       -      +
     59A  VAL*     3.9    16.5    -      -       +      +
     60A  SER*     3.4    33.8    +      -       -      -
     63A  ARG*     2.9    40.0    +      -       -      +
     87B  ASN      2.8    25.4    +      -       -      +
     88B  LEU      3.8     3.1    -      -       -      +
     90B  GLN*     1.3    72.7    -      -       -      +
     92B  GLY*     1.3    62.1    +      -       -      +
     94B  GLU*     3.9     3.6    -      -       -      +
     95B  SER*     3.1    31.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 92 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63A  ARG*     4.9     3.3    -      -       -      +
     88B  LEU      3.0     8.7    +      -       -      -
     89B  LEU      3.0     8.7    +      -       -      -
     90B  GLN      2.9     0.8    -      -       -      -
     91B  ASP*     1.3    78.4    -      -       -      +
     93B  GLN*     1.3    65.8    -      -       -      +
     95B  SER*     3.1    17.8    +      -       -      -
     96B  TYR*     3.2    11.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 93 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     89B  LEU*     3.0    28.6    +      -       +      +
     90B  GLN*     3.6    22.0    -      -       -      +
     92B  GLY*     1.3    77.7    -      -       -      +
     94B  GLU*     1.3    57.2    +      -       -      +
     96B  TYR*     3.0    19.5    +      -       -      +
     97B  VAL*     2.9    28.9    +      -       -      +
    164B  ARG*     3.4    22.1    +      -       -      +
    256B  ALA*     5.0     3.3    -      -       -      +
    259B  ARG*     3.2    45.0    +      -       +      +
    260B  ASP*     5.6     1.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 94 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     55A  TYR*     3.7    27.4    -      -       +      -
     56A  PRO*     3.6    16.7    -      -       +      +
     59A  VAL*     4.2    10.3    -      -       +      -
     90B  GLN      2.7    22.2    +      -       -      +
     91B  ASP*     4.1     8.7    -      -       -      +
     93B  GLN*     1.3    70.0    -      -       -      +
     95B  SER*     1.3    59.3    +      -       -      +
     97B  VAL*     4.2     2.0    -      -       -      +
     98B  GLN*     2.6    68.0    +      -       +      +
    164B  ARG*     2.7    39.0    +      -       -      +
    167B  THR*     5.8     0.7    -      -       -      +
    168B  HIS*     3.0    15.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with SER 95 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91B  ASP*     3.1    20.2    +      -       -      -
     92B  GLY*     3.1    13.3    +      -       -      -
     94B  GLU*     1.3    75.8    -      -       -      +
     96B  TYR*     1.3    57.3    +      -       -      +
     98B  GLN*     4.0     4.1    -      -       -      +
     99B  GLY*     3.0    24.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 96 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     92B  GLY      3.2     7.7    +      -       -      +
     93B  GLN*     3.0    22.6    +      -       -      +
     94B  GLU      3.0     0.6    -      -       -      -
     95B  SER*     1.3    77.2    -      -       -      +
     97B  VAL*     1.3    75.9    +      -       +      +
     99B  GLY*     3.0    10.6    +      -       -      -
    100B  LEU*     3.1    46.1    +      -       +      +
    252B  LEU*     3.9    24.1    +      -       -      +
    256B  ALA*     4.3    20.0    -      -       +      -
    259B  ARG*     6.4     1.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 97 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     93B  GLN      2.9    13.8    +      -       -      +
     94B  GLU*     4.1     8.5    -      -       -      +
     96B  TYR*     1.3    78.8    -      -       +      +
     98B  GLN*     1.3    59.1    +      -       -      +
    100B  LEU*     3.1     9.6    +      -       +      +
    101B  PHE*     3.0    56.7    +      -       +      -
    164B  ARG*     3.6    24.9    -      -       -      +
    168B  HIS*     3.8    17.3    -      -       +      +
    253B  LEU*     3.9    11.4    -      -       +      -
    256B  ALA*     3.8    24.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 98 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      3A  MET*     3.4    29.9    -      -       +      +
     56A  PRO*     4.0    22.1    -      -       +      +
     94B  GLU*     2.6    63.7    +      -       +      +
     95B  SER*     4.3     4.5    -      -       -      +
     97B  VAL*     1.3    72.7    -      -       -      +
     99B  GLY*     1.3    55.8    +      -       -      +
    101B  PHE*     3.8    23.9    -      -       -      -
    102B  ASP*     3.0    30.0    +      -       -      +
    167B  THR*     6.1     1.4    -      -       -      +
    168B  HIS*     4.3     6.7    +      -       -      -
    171B  TYR*     5.6     3.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 99 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     95B  SER      3.0    17.4    +      -       -      -
     96B  TYR*     3.0     5.1    +      -       -      -
     98B  GLN*     1.3    76.0    -      -       -      +
    100B  LEU*     1.3    64.9    +      -       -      +
    102B  ASP*     3.5     3.7    +      -       -      +
    103B  GLN*     3.0    38.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 100 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     96B  TYR*     3.1    43.2    +      -       +      +
     97B  VAL*     3.1    11.2    +      -       +      +
     99B  GLY*     1.3    74.3    -      -       -      +
    101B  PHE*     1.3    71.3    +      -       +      +
    103B  GLN*     5.2     1.1    -      -       -      -
    104B  LEU*     2.8    47.8    +      -       +      +
    249B  LEU*     4.8     5.2    -      -       +      +
    252B  LEU*     3.5    45.5    -      -       +      -
    253B  LEU*     4.6     8.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 101 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      2A  SER      4.6     1.1    -      -       -      -
      3A  MET*     4.2     4.0    -      -       -      -
     97B  VAL*     3.0    39.4    +      -       +      -
     98B  GLN*     3.6    28.7    -      -       -      +
    100B  LEU*     1.3    82.0    -      -       +      +
    102B  ASP*     1.3    64.4    +      -       -      +
    104B  LEU*     4.5     0.5    -      -       -      +
    105B  ASN*     3.2    23.0    +      -       -      +
    168B  HIS*     4.3    18.8    -      -       +      -
    171B  TYR*     3.3    48.9    -      +       +      -
    172B  ARG*     3.9    31.6    -      -       +      -
    175B  GLU*     4.6     5.3    -      -       -      +
    249B  LEU*     4.2    21.9    -      -       +      +
    253B  LEU*     4.4     7.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 102 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      2A  SER*     2.7    54.3    +      -       -      -
      3A  MET*     3.4    23.5    -      -       -      -
     98B  GLN      3.0    15.0    +      -       -      +
     99B  GLY*     3.8     5.4    -      -       -      +
    100B  LEU      3.3     0.2    -      -       -      -
    101B  PHE*     1.3    81.1    -      -       -      +
    103B  GLN*     1.3    67.5    +      -       +      +
    106B  ASP*     3.2    18.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 103 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99B  GLY*     3.0    22.1    +      -       -      +
    100B  LEU*     4.5     1.6    -      -       -      +
    102B  ASP*     1.3    83.0    +      -       -      +
    104B  LEU*     1.3    67.5    +      -       +      +
    105B  ASN      3.1     1.8    -      -       -      -
    106B  ASP*     3.0    28.7    +      -       +      +
    107B  ARG*     3.3    10.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 104 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    100B  LEU*     2.8    41.2    +      -       +      +
    103B  GLN*     1.3    74.8    -      -       +      +
    105B  ASN*     1.3    59.9    +      -       -      +
    107B  ARG*     3.4    47.4    +      -       +      +
    109B  HIS*     3.1    42.3    +      -       +      +
    248B  THR*     4.3     5.6    -      -       -      +
    249B  LEU*     3.6    48.5    -      -       +      +
    252B  LEU*     5.3     2.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 105 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      2A  SER*     2.7    50.2    +      -       -      +
    101B  PHE      3.2    20.1    +      -       -      +
    102B  ASP      3.4     3.1    -      -       -      +
    103B  GLN      3.1     0.4    -      -       -      -
    104B  LEU*     1.3    78.4    -      -       -      +
    106B  ASP*     1.3    62.9    +      -       -      +
    108B  GLY*     3.0    15.9    +      -       -      -
    109B  HIS*     4.9     1.6    -      -       -      +
    110B  ASP*     6.1     1.3    -      -       -      +
    175B  GLU*     3.7    17.4    -      -       -      +
    249B  LEU*     5.8     0.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 106 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      2A  SER*     2.8    32.8    +      -       -      -
    102B  ASP*     3.2    16.5    +      -       -      +
    103B  GLN*     3.0    23.3    +      -       +      +
    105B  ASN*     1.3    82.6    +      -       -      +
    107B  ARG*     1.3    55.8    +      -       +      +
    108B  GLY      3.6     1.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 107 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    103B  GLN      3.3    10.2    +      -       -      +
    104B  LEU*     3.5    35.5    -      -       +      +
    105B  ASN      3.2     1.2    -      -       -      -
    106B  ASP*     1.3    77.6    -      -       -      +
    108B  GLY*     1.3    64.4    +      -       -      +
    109B  HIS*     3.4    11.3    +      -       -      +
    112B  MET*     4.7    22.6    -      -       -      +
    248B  THR*     4.7     8.7    +      -       -      +
----------------------------------------------------------
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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