Contacts of the helix formed by residues 2 - 25 (chain F) in PDB entry 6C4Z


Residue contacts within the protein are derived with the CSU software (Sobolev V., Sorokine A., Prilusky J., Abola E.E. and Edelman M. (1999) Automated analysis of interatomic contacts in proteins. Bioinformatics, 15, 327-332). A short description of the analytical approach is given at the end of the page.
For CSU analysis of other PDB entry

Note:
Non-standard 3 letter residue codes indicate a heterogroup. To identify and analyse, use LPC software

Legend:
Dist - nearest distance (Å) between atoms of two residues
Surf - contact surface area (Å2) between two residues
HB   - hydrophilic-hydrophilic contact (hydrogen bond)
Arom - aromatic-aromatic contact
Phob - hydrophobic-hydrophobic contact
DC   - hydrophobic-hydrophilic contact (destabilizing contact)
+/-  - indicates presence/absence of a specific contacts
*    - indicates residues forming contacts  by their side chain
       (including CA atoms)
Residues in contact with LYS 2 (chain F).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     16D  LYS*     5.8     1.6    -      -       -      +
     19D  GLU*     6.3     2.2    -      -       +      -
     20D  LEU*     3.4    28.6    -      -       +      +
     23D  LYS*     3.8    40.1    -      -       +      +
      1F  SER*     1.3    78.0    -      -       -      +
      3F  LEU*     1.3    60.6    +      -       -      +
      4F  LEU      3.3     0.2    -      -       -      -
      5F  GLU*     3.6    17.5    +      -       -      +
      6F  LEU*     3.2    25.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 3 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     20D  LEU*     4.1    25.3    -      -       +      +
     24D  TRP*     4.4    14.8    -      -       +      -
      3E  LEU*     3.8    28.3    -      -       +      -
      4E  LEU*     3.5    32.3    -      -       +      -
      7E  LEU*     3.6    31.2    -      -       +      -
      1F  SER      3.3     6.1    -      -       -      +
      2F  LYS*     1.3    78.1    -      -       -      +
      4F  LEU*     1.3    59.8    +      -       +      +
      6F  LEU*     3.6     2.7    +      -       +      +
      7F  LEU*     3.0    28.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 4 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      3E  LEU*     3.6    29.4    -      -       +      -
      1F  SER*     3.7    27.3    +      -       -      +
      2F  LYS      3.3     0.4    -      -       -      -
      3F  LEU*     1.3    74.9    -      -       -      +
      5F  GLU*     1.3    60.2    +      -       -      +
      7F  LEU*     3.1    13.4    +      -       +      +
      8F  ARG*     2.9    30.1    +      -       -      +
     24G  TRP*     4.1    16.6    -      -       +      -
     18H  ILE*     4.8     3.2    -      -       +      +
     21H  LEU*     4.7     7.2    -      -       +      -
     22H  GLU*     3.9    37.7    -      -       +      +
     25H  GLY*     4.1    30.7    -      -       -      -
     26H  NH2      4.4     1.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 5 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     16D  LYS*     3.4    38.9    -      -       +      +
      1F  SER      3.3    13.0    +      -       -      +
      2F  LYS*     3.6    19.5    -      -       -      +
      4F  LEU*     1.3    77.9    -      -       -      +
      6F  LEU*     1.3    62.3    +      -       -      +
      8F  ARG*     3.3    24.9    +      -       -      +
      9F  LYS*     3.1    27.7    +      -       +      +
     22H  GLU*     3.8    11.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 6 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     14C  LEU*     5.2     1.3    -      -       +      -
     18C  ILE*     5.9     1.8    -      -       +      -
     21C  LEU*     3.8    23.6    -      -       +      -
     13D  ALA*     3.6    28.5    -      -       -      +
     16D  LYS*     4.6    13.1    -      -       +      +
     17D  ALA*     4.0    15.9    -      -       +      +
     20D  LEU*     4.3    12.6    -      -       +      -
      7E  LEU*     3.8    22.9    -      -       +      -
      2F  LYS      3.2    14.8    +      -       -      +
      3F  LEU*     3.8     4.0    -      -       +      +
      5F  GLU*     1.3    75.5    -      -       -      +
      7F  LEU*     1.3    67.3    +      -       -      +
      9F  LYS*     3.4     6.1    +      -       -      +
     10F  LEU*     3.1    42.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 7 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      3E  LEU*     4.0    29.8    -      -       +      -
      6E  LEU*     3.9    23.8    -      -       +      -
      7E  LEU*     3.7    30.3    -      -       +      -
     10E  LEU*     3.5    31.6    -      -       +      +
      3F  LEU*     3.0    25.5    +      -       +      +
      4F  LEU*     3.1    19.3    +      -       +      +
      6F  LEU*     1.3    75.8    -      -       -      +
      8F  ARG*     1.3    63.8    +      -       -      +
     10F  LEU*     3.2     8.2    +      -       +      +
     11F  GLY*     3.0    17.8    +      -       -      -
     18H  ILE*     3.8    15.4    -      -       +      +
     21H  LEU*     5.5     3.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 8 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      4F  LEU      2.9    11.9    +      -       -      +
      5F  GLU*     3.5    34.6    +      -       -      +
      6F  LEU      3.3     0.2    -      -       -      -
      7F  LEU*     1.3    74.3    -      -       -      +
      9F  LYS*     1.3    80.8    +      -       -      +
     11F  GLY*     2.7    24.1    +      -       -      -
     12F  GLU*     2.8    34.4    +      -       +      +
     15H  HIS*     4.8     2.5    -      -       +      +
     18H  ILE*     3.5    14.9    -      -       +      +
     19H  GLU*     4.0    28.9    -      -       +      +
     22H  GLU*     2.8    41.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 9 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      9D  LYS*     4.6     6.1    -      -       +      +
     12D  GLU*     3.4    46.8    +      -       +      +
     13D  ALA*     4.0    23.2    -      -       -      +
     16D  LYS*     4.7    19.7    -      -       +      +
      5F  GLU*     3.1    17.7    +      -       +      +
      6F  LEU*     3.6     8.7    -      -       -      +
      8F  ARG*     1.3    97.7    -      -       -      +
     10F  LEU*     1.3    56.5    +      -       -      +
     12F  GLU*     3.3    25.1    +      -       -      +
     13F  ALA*     2.9    29.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 10 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     14C  LEU*     3.7    36.3    -      -       +      -
     18C  ILE*     4.5    13.7    -      -       +      -
     13D  ALA*     4.0    10.8    -      -       +      -
      7E  LEU*     4.4    20.9    -      -       +      +
     10E  LEU*     4.2    27.0    -      -       +      +
     11E  GLY      5.2     3.1    -      -       -      +
     14E  LEU*     4.2    14.1    -      -       +      +
      6F  LEU*     3.1    38.9    +      -       +      +
      7F  LEU*     3.4     7.2    -      -       -      +
      9F  LYS*     1.3    74.6    -      -       -      +
     11F  GLY*     1.3    57.8    +      -       -      +
     13F  ALA*     3.4     4.5    +      -       -      +
     14F  LEU*     2.9    31.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 11 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     10E  LEU*     4.7     3.8    -      -       -      +
      7F  LEU      3.0     9.8    +      -       -      -
      8F  ARG      2.7    13.7    +      -       -      -
     10F  LEU*     1.3    71.2    -      -       -      +
     12F  GLU*     1.3    54.7    +      -       -      -
     14F  LEU*     3.5     5.9    +      -       -      +
     15F  HIS*     2.9    30.0    +      -       -      +
     11H  GLY      5.2     0.3    -      -       -      +
     14H  LEU*     5.8     1.1    -      -       -      -
     15H  HIS*     4.1    17.5    -      -       -      +
     18H  ILE*     4.2    19.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 12 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      9D  LYS*     2.9    39.1    +      -       +      +
      8F  ARG*     2.8    46.1    +      -       +      +
      9F  LYS*     3.6    25.2    +      -       -      +
     11F  GLY*     1.3    72.5    -      -       -      +
     13F  ALA*     1.3    61.3    +      -       -      +
     15F  HIS*     3.5     6.1    +      -       -      +
     16F  LYS*     3.1    30.8    +      -       -      +
     15H  HIS*     3.3    27.7    +      -       +      +
     19H  GLU*     4.5     2.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 13 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6D  LEU*     3.3    13.1    -      -       +      +
      9D  LYS*     3.9    27.7    -      -       +      +
     10D  LEU*     4.3    15.9    -      -       +      -
     13D  ALA*     5.3     1.3    -      -       +      -
     14E  LEU*     4.1    17.0    -      -       +      -
      9F  LYS      2.9    16.6    +      -       -      +
     10F  LEU*     3.7     5.8    -      -       -      +
     12F  GLU*     1.3    72.9    -      -       -      +
     14F  LEU*     1.3    60.1    +      -       -      +
     16F  LYS*     3.3     2.0    +      -       -      +
     17F  ALA*     2.9    25.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 14 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     10E  LEU*     4.1    15.5    -      -       +      +
     13E  ALA*     3.9    18.8    -      -       +      -
     14E  LEU*     3.9    36.9    -      -       +      +
     17E  ALA*     4.3    11.4    -      -       +      -
     10F  LEU      2.9    17.7    +      -       -      +
     11F  GLY*     3.8     4.5    -      -       -      +
     13F  ALA*     1.3    73.0    -      -       -      +
     15F  HIS*     1.3    65.7    +      -       -      +
     17F  ALA*     3.4     2.1    +      -       -      +
     18F  ILE*     3.0    46.8    +      -       +      +
      6G  LEU*     4.8     2.0    -      -       +      -
     10G  LEU*     3.7    22.9    -      -       +      -
     11H  GLY*     5.8     1.6    -      -       -      -
     14H  LEU*     3.8    17.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with HIS 15 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     11F  GLY      2.9    19.2    +      -       -      +
     12F  GLU*     3.5     8.7    -      -       -      +
     14F  LEU*     1.3    77.3    -      -       -      +
     16F  LYS*     1.3    70.0    +      -       +      +
     18F  ILE*     3.4     8.6    +      -       -      +
     19F  GLU*     2.7    54.9    +      -       +      +
      8H  ARG*     4.7     5.2    +      -       +      +
     11H  GLY*     4.3     5.3    -      -       -      +
     12H  GLU*     3.3    46.3    +      -       +      +
     15H  HIS*     4.5    27.7    +      +       +      -
----------------------------------------------------------
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Residues in contact with LYS 16 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      2D  LYS      5.5     1.8    -      -       -      +
      5D  GLU*     3.1    42.7    +      -       +      +
      6D  LEU*     4.3    18.6    -      -       +      +
      8D  ARG*     5.9     0.7    -      -       -      +
      9D  LYS*     4.4    26.5    -      -       +      +
     12F  GLU*     3.1    17.8    +      -       -      +
     13F  ALA      3.3     6.7    +      -       -      +
     15F  HIS*     1.3    79.7    -      -       +      +
     17F  ALA*     1.3    67.4    +      -       -      +
     19F  GLU*     3.0    24.7    +      -       -      +
     20F  LEU*     2.9    23.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 17 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6D  LEU*     3.9    27.7    -      -       +      +
     14E  LEU*     4.1     9.0    -      -       +      -
     17E  ALA*     4.0    22.0    -      -       +      -
     18E  ILE*     5.5     0.4    -      -       +      -
     21E  LEU*     4.1     7.0    -      -       +      +
     13F  ALA      2.9    17.6    +      -       -      +
     14F  LEU      3.5     5.2    -      -       -      +
     16F  LYS*     1.3    76.1    -      -       -      +
     18F  ILE*     1.3    57.0    +      -       -      +
     20F  LEU*     3.4     4.1    +      -       -      +
     21F  LEU*     3.0    32.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 18 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     17E  ALA*     5.1     1.1    -      -       +      -
     14F  LEU*     3.0    39.4    +      -       +      +
     15F  HIS*     3.8     4.9    -      -       -      +
     17F  ALA*     1.3    73.6    -      -       +      +
     19F  GLU*     1.3    66.5    +      -       -      +
     21F  LEU*     3.2    17.8    +      -       +      +
     22F  GLU*     2.9    22.8    +      -       +      +
      6G  LEU*     4.8     7.2    -      -       +      -
     10G  LEU*     3.8    33.0    -      -       +      -
      4H  LEU*     4.7     3.3    -      -       +      +
      7H  LEU*     3.9    12.3    -      -       +      +
      8H  ARG*     3.6    35.2    -      -       +      +
     11H  GLY*     4.1    16.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 19 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     15F  HIS*     2.7    52.6    +      -       +      +
     16F  LYS*     3.0    28.1    +      -       -      +
     18F  ILE*     1.3    75.2    -      -       -      +
     20F  LEU*     1.3    62.0    +      -       -      +
     22F  GLU*     3.2    11.6    +      -       -      +
     23F  LYS*     3.1    21.4    +      -       -      +
      8H  ARG*     4.4    19.6    -      -       +      +
     12H  GLU*     5.0     1.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 20 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      2D  LYS*     3.9    29.8    -      -       +      +
      3D  LEU*     4.1    29.6    -      -       +      +
      6D  LEU*     4.2     6.3    -      -       +      -
     21E  LEU*     3.5    30.3    -      -       +      -
     16F  LYS      2.9    12.1    +      -       -      +
     17F  ALA*     3.5     8.5    -      -       -      +
     19F  GLU*     1.3    73.4    -      -       -      +
     21F  LEU*     1.3    65.2    +      -       -      +
     23F  LYS*     3.0    12.9    +      -       +      +
     24F  TRP*     2.9    61.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 21 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     17E  ALA*     4.0    19.5    -      -       +      +
     20E  LEU*     3.6    28.7    -      -       +      -
     21E  LEU*     3.7    25.5    -      -       +      +
     24E  TRP*     3.4    26.3    -      -       +      -
     17F  ALA      3.0    18.7    +      -       -      +
     18F  ILE*     3.2    15.2    +      -       +      +
     20F  LEU*     1.3    74.7    -      -       -      +
     22F  GLU*     1.3    53.1    +      -       -      +
     24F  TRP*     4.8     0.9    -      -       -      -
     25F  GLY*     2.8    33.1    +      -       -      -
      3G  LEU*     5.5     2.5    -      -       +      -
      6G  LEU*     4.0    27.1    -      -       +      -
      4H  LEU*     4.0    12.0    -      -       +      +
      7H  LEU*     5.8     1.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 22 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18F  ILE      2.9    11.8    +      -       -      +
     19F  GLU*     3.3    11.4    -      -       -      +
     20F  LEU      3.1     0.4    -      -       -      -
     21F  LEU*     1.3    75.0    -      -       -      +
     23F  LYS*     1.3    63.2    +      -       -      +
     25F  GLY      3.1     2.1    +      -       -      -
     26F  NH2      3.0    21.5    +      -       -      -
      1H  SER      5.2     1.8    -      -       -      +
      4H  LEU*     3.9    32.0    -      -       +      +
      5H  GLU*     3.9    13.4    +      -       -      +
      8H  ARG*     3.0    46.9    +      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 23 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      2D  LYS*     5.0    13.7    -      -       +      +
     19F  GLU      3.1     8.9    +      -       -      +
     20F  LEU*     3.0    18.7    +      -       +      +
     22F  GLU*     1.3    79.7    +      -       -      +
     24F  TRP*     1.3    73.3    +      -       +      +
     26F  NH2      3.7     4.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with TRP 24 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      4C  LEU*     4.1    25.1    -      -       +      -
      3D  LEU*     4.5    11.2    -      -       +      -
     21E  LEU*     3.5    29.8    -      -       +      -
     24E  TRP*     4.4    18.7    -      +       +      +
     25E  GLY*     3.4    37.0    -      -       -      -
     20F  LEU*     2.9    50.3    +      -       +      +
     21F  LEU*     4.2     2.5    -      -       -      +
     23F  LYS*     1.3    87.3    -      -       +      +
     25F  GLY*     1.3    64.6    +      -       -      +
     26F  NH2      3.4     1.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 25 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     24E  TRP*     3.4    22.1    -      -       -      -
     21F  LEU      2.8    24.7    +      -       -      -
     22F  GLU      3.6     0.9    -      -       -      -
     24F  TRP*     1.3    74.1    -      -       -      +
     26F  NH2      1.3    45.3    +      -       -      -
      1H  SER*     4.9     7.0    -      -       -      -
      4H  LEU*     3.8    15.2    -      -       -      +
----------------------------------------------------------
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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