Contacts of the helix formed by residues 6 - 29 (chain D) in PDB entry 5OA3


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

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

Legend:
Dist - nearest distance (Å) between atoms of two residues
Surf - contact surface area (Å2) between two residues
HB   - hydrophilic-hydrophilic contact (hydrogen bond)
Arom - aromatic-aromatic contact
Phob - hydrophobic-hydrophobic contact
DC   - hydrophobic-hydrophilic contact (destabilizing contact)
+/-  - indicates presence/absence of a specific contacts
*    - indicates residues forming contacts  by their side chain
       (including CA atoms)
Residues in contact with SER 6 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   15512    U      4.8     6.7    -      -       -      -
   15782    U      3.1    45.3    +      -       -      -
   15792    A      4.3    14.0    +      -       -      -
      5D  ILE*     1.3    80.8    -      -       -      +
      7D  LYS*     1.3    63.1    +      -       -      +
      8D  LYS*     3.3    13.0    +      -       -      +
      9D  ARG*     3.3    15.5    +      -       -      +
     10D  LYS*     2.8    26.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 7 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   15782    U      4.2     2.0    +      -       -      -
   15792    A      3.5    22.8    +      -       -      +
      5D  ILE      3.8     2.6    +      -       -      +
      6D  SER*     1.3    76.9    +      -       -      +
      8D  LYS*     1.3    66.5    +      -       +      +
     10D  LYS*     2.8    45.1    +      -       +      +
     11D  PHE*     2.9    36.3    +      -       +      -
     23U  THR*     5.7     1.1    -      -       -      -
     25U  THR*     3.4    41.8    +      -       +      +
     84U  ILE*     4.7     7.4    -      -       +      -
     86U  LYS*     5.5     6.7    -      -       +      +
    112U  VAL      6.3     0.2    -      -       -      -
    113U  GLU*     3.7    24.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 8 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   15492    U      2.8    36.2    +      -       -      -
   15502    G      4.0    18.3    +      -       -      +
   15792    A      5.9     5.3    +      -       -      -
      6D  SER*     3.3    10.3    -      -       -      +
      7D  LYS*     1.3    80.4    -      -       +      +
      9D  ARG*     1.3    60.9    +      -       +      +
     11D  PHE*     3.2     2.3    +      -       -      +
     12D  VAL*     2.9    34.1    +      -       -      +
     59U  LYS*     5.2    15.0    -      -       +      -
     60U  THR      5.4     1.5    +      -       -      +
     61U  LEU*     3.8    28.3    -      -       +      +
     84U  ILE*     4.2    13.0    -      -       +      +
     34d  TYR*     3.8    23.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 9 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   15502    G      5.0     5.3    +      -       -      -
   15512    U      2.5    44.3    +      -       -      -
   15782    U      6.0     0.7    -      -       -      -
      5D  ILE*     3.8    29.6    -      -       +      +
      6D  SER*     3.3    12.6    +      -       -      +
      8D  LYS*     1.3    81.2    -      -       +      +
     10D  LYS*     1.3    58.9    +      -       -      +
     12D  VAL*     3.7     7.8    -      -       -      +
     13D  ALA*     2.9    31.7    +      -       -      +
     33d  LYS      4.9     8.1    +      -       -      -
     34d  TYR*     3.4    30.8    +      -       +      +
     35d  GLY*     5.2     5.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 10 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      5D  ILE*     4.7    14.1    -      -       +      +
      6D  SER      2.8    14.6    +      -       -      +
      7D  LYS*     2.8    46.8    -      -       +      +
      8D  LYS      3.1     0.2    -      -       -      -
      9D  ARG*     1.3    77.5    -      -       -      +
     11D  PHE*     1.3    64.5    +      -       +      +
     13D  ALA*     3.3     6.7    +      -       -      +
     14D  ASP*     3.0    22.2    +      -       +      +
    111U  GLU*     3.6    32.5    +      -       -      +
    112U  VAL      5.5     5.1    +      -       -      -
    113U  GLU*     5.2     4.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 11 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      7D  LYS*     2.9    33.4    +      -       +      +
      8D  LYS      3.7     3.6    -      -       -      +
     10D  LYS*     1.3    78.6    -      -       +      +
     12D  VAL*     1.3    62.9    +      -       +      +
     14D  ASP*     3.1    11.5    +      -       -      +
     15D  GLY*     2.9    19.9    +      -       -      -
     25U  THR*     3.8    20.6    -      -       -      -
     26U  SER*     3.8    25.4    -      -       -      -
     27U  ARG*     3.9    43.8    +      -       +      +
     61U  LEU*     5.8     0.2    -      -       +      -
     82U  MET*     5.1    10.4    -      -       -      +
     84U  ILE*     4.0    32.3    -      -       +      -
    109U  GLY      5.5     2.5    -      -       -      -
    111U  GLU*     3.5    33.2    -      -       -      -
     50d  ILE      5.1     1.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 12 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8D  LYS      2.9    24.2    +      -       -      +
      9D  ARG*     3.7     6.7    -      -       -      +
     11D  PHE*     1.3    75.6    -      -       -      +
     13D  ALA*     1.3    59.0    +      -       -      +
     15D  GLY*     3.0     5.0    +      -       -      -
     16D  ILE*     2.9    37.1    +      -       +      +
     61U  LEU*     4.5    17.0    -      -       +      -
     82U  MET*     5.6     4.9    -      -       +      -
     34d  TYR*     4.1    29.8    -      -       +      +
     35d  GLY      5.2     0.9    -      -       -      -
     36d  LEU*     3.5    33.0    -      -       +      +
     50d  ILE*     4.9     6.0    -      -       +      +
     52d  PHE*     5.0    10.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 13 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      5D  ILE*     6.2     3.6    -      -       +      -
      9D  ARG      2.9    19.7    +      -       -      +
     10D  LYS*     3.6     5.2    -      -       -      +
     12D  VAL*     1.3    76.7    -      -       -      +
     14D  ASP*     1.3    57.3    +      -       -      +
     16D  ILE*     3.3    15.4    +      -       +      +
     17D  PHE*     2.9    27.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 14 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     10D  LYS*     3.0    14.5    +      -       +      +
     11D  PHE*     3.2    17.1    -      -       -      +
     13D  ALA*     1.3    75.3    -      -       -      +
     15D  GLY*     1.3    65.2    +      -       -      +
     17D  PHE*     3.1    20.2    +      -       -      +
     18D  LYS*     2.9    41.9    +      -       -      +
     39D  VAL*     5.9     0.2    -      -       -      +
     41D  VAL*     5.6     5.8    -      -       -      +
     27U  ARG*     5.7     3.9    +      -       -      -
    111U  GLU*     3.3    23.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 15 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     11D  PHE      2.9    12.2    +      -       -      -
     12D  VAL      3.0     4.5    +      -       -      -
     14D  ASP*     1.3    76.7    -      -       -      +
     16D  ILE*     1.3    56.5    +      -       -      +
     18D  LYS*     3.1     7.9    +      -       -      +
     19D  ALA*     2.9    29.5    +      -       -      +
     27U  ARG*     5.0     4.9    -      -       -      +
     49d  ASP      4.0     5.3    -      -       -      +
     50d  ILE*     3.6    32.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 16 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     12D  VAL*     2.9    29.8    +      -       +      +
     13D  ALA*     3.6    13.0    -      -       -      +
     15D  GLY*     1.3    74.8    -      -       -      +
     17D  PHE*     1.3    58.4    +      -       -      +
     19D  ALA*     3.9     5.5    -      -       -      +
     20D  GLU*     2.9    37.0    +      -       -      +
     77D  PHE*     5.3     0.2    -      -       -      -
     64K  TRP*     3.7    28.7    -      -       +      -
     22d  ARG*     3.5    46.4    -      -       -      +
     35d  GLY      4.9     0.4    -      -       -      +
     36d  LEU*     3.9    16.2    -      -       +      -
     38d  MET*     5.5     2.2    -      -       -      -
     50d  ILE*     4.9     6.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 17 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     13D  ALA      2.9    14.7    +      -       -      +
     14D  ASP*     3.1    24.5    -      -       -      +
     16D  ILE*     1.3    77.3    -      -       -      +
     18D  LYS*     1.3    78.4    +      -       +      +
     20D  GLU*     3.9     0.3    -      -       -      -
     21D  LEU*     2.9    43.1    +      -       +      +
     39D  VAL*     3.8    36.1    -      -       +      -
     41D  VAL*     6.0     0.7    -      -       +      -
     46D  THR*     4.9     8.1    -      -       +      -
     48D  ILE*     4.5     9.2    -      -       +      -
     73D  VAL*     4.8     2.7    -      -       +      -
     77D  PHE*     3.5    51.3    -      +       +      -
     79D  PHE*     4.7    13.5    -      +       -      -
----------------------------------------------------------
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Residues in contact with LYS 18 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     14D  ASP*     2.9    35.7    +      -       -      +
     15D  GLY*     3.1     8.0    +      -       -      +
     17D  PHE*     1.3    89.0    -      -       +      +
     19D  ALA*     1.3    58.2    +      -       -      +
     21D  LEU*     3.8     4.0    -      -       -      +
     22D  ASN*     2.9    32.9    +      -       -      +
     37D  VAL*     5.4     2.4    -      -       -      +
     39D  VAL*     4.5    33.8    +      -       +      +
     41D  VAL*     6.1     1.8    -      -       -      -
     27U  ARG*     4.4    19.5    -      -       -      +
    109U  GLY*     6.2     2.4    -      -       -      -
     49d  ASP*     4.5    14.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 19 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     15D  GLY      2.9    16.7    +      -       -      +
     16D  ILE*     3.9     7.0    -      -       -      +
     18D  LYS*     1.3    75.8    -      -       -      +
     20D  GLU*     1.3    60.0    +      -       -      +
     22D  ASN*     3.5     3.9    +      -       -      +
     23D  GLU*     2.9    30.0    +      -       -      +
     64K  TRP*     4.5    14.9    +      -       +      -
     46d  TYR*     4.7    12.9    -      -       +      -
     49d  ASP*     4.1    27.5    -      -       +      +
     50d  ILE*     4.7     8.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 20 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     16D  ILE*     2.9    25.2    +      -       -      +
     17D  PHE      4.0     1.8    -      -       -      +
     19D  ALA*     1.3    74.1    -      -       -      +
     21D  LEU*     1.3    60.2    +      -       -      +
     23D  GLU*     3.5     5.0    -      -       -      +
     24D  PHE*     2.9    31.4    +      -       +      +
     76D  ARG*     3.2    40.5    +      -       +      +
     77D  PHE*     4.5    15.9    -      -       +      -
     63K  ALA*     4.5     3.1    -      -       +      +
     64K  TRP*     3.1    60.1    -      -       +      +
     66K  HIS*     4.5     0.2    -      -       -      -
     68K  TYR*     5.1     3.3    +      -       -      +
     22d  ARG*     4.7     1.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 21 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     17D  PHE*     2.9    25.6    +      -       +      +
     18D  LYS*     3.8     3.1    -      -       -      +
     20D  GLU*     1.3    74.9    -      -       -      +
     22D  ASN*     1.3    65.9    +      -       -      +
     24D  PHE*     3.2    11.2    +      -       +      +
     25D  LEU*     2.9    42.1    +      -       +      +
     37D  VAL*     3.7    29.8    -      -       +      -
     39D  VAL*     4.1    10.8    -      -       +      -
     48D  ILE*     3.7    26.7    -      -       +      -
     73D  VAL*     4.4    22.7    -      -       +      -
     77D  PHE*     4.3    17.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 22 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18D  LYS      2.9    20.2    +      -       -      +
     19D  ALA*     3.7     6.5    -      -       -      +
     21D  LEU*     1.3    76.2    -      -       -      +
     23D  GLU*     1.3    53.3    +      -       -      +
     26D  THR*     2.7    39.4    +      -       -      -
     34D  TYR*     2.2    41.2    +      -       -      -
     35D  SER      5.1     0.3    -      -       -      +
     36D  GLY*     4.0     5.9    -      -       -      -
     37D  VAL*     3.9    24.4    +      -       +      +
     49d  ASP*     4.3    22.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 23 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     19D  ALA      2.9    19.5    +      -       -      +
     20D  GLU      3.5     4.7    -      -       -      +
     21D  LEU      3.1     0.2    -      -       -      -
     22D  ASN*     1.3    75.3    -      -       -      +
     24D  PHE*     1.3    60.1    +      -       -      +
     26D  THR*     3.0    20.4    +      -       -      +
     27D  ARG*     2.9    62.5    +      -       +      +
     63K  ALA*     4.8     0.9    -      -       +      -
     64K  TRP*     3.4    33.9    -      -       +      +
     45d  GLN*     5.6     0.5    +      -       -      -
     46d  TYR*     3.6    23.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 24 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     20D  GLU*     2.9    18.3    +      -       +      +
     21D  LEU*     3.8    10.1    -      -       +      +
     23D  GLU*     1.3    75.1    -      -       -      +
     25D  LEU*     1.3    67.6    +      -       +      +
     27D  ARG*     3.0     4.9    +      -       -      +
     28D  GLU*     3.0    33.7    +      -       -      +
     69D  LEU*     3.5    24.5    -      -       +      -
     72D  VAL*     3.8    15.5    -      -       +      -
     61K  GLN*     3.5    26.2    -      -       +      -
     63K  ALA*     3.7    28.9    -      -       +      +
     68K  TYR*     3.5    38.4    -      +       +      +
     70K  TYR*     3.2    22.2    -      +       -      -
----------------------------------------------------------
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Residues in contact with LEU 25 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     21D  LEU*     2.9    31.1    +      -       +      +
     24D  PHE*     1.3    86.9    -      -       +      +
     26D  THR*     1.3    59.4    +      -       -      +
     28D  GLU*     4.5     2.2    -      -       -      +
     29D  LEU*     2.9    54.3    +      -       +      +
     34D  TYR*     3.5    24.9    -      -       +      -
     37D  VAL*     3.5    19.5    -      -       +      -
     50D  ILE*     3.5    33.7    -      -       +      -
     69D  LEU*     4.2    19.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 26 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     22D  ASN*     2.7    23.6    +      -       -      -
     23D  GLU*     3.0    24.4    +      -       -      +
     25D  LEU*     1.3    77.3    -      -       -      +
     27D  ARG*     1.3    62.8    +      -       -      +
     30D  ALA*     3.4    20.3    +      -       -      +
     34D  TYR*     3.2    20.2    -      -       +      -
    103D  GLU*     6.0     1.8    -      -       +      +
    106D  ARG*     6.3     1.3    -      -       -      +
    173D  ARG*     3.6    33.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 27 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   14972    G      3.8     7.4    +      -       -      -
   14982    A      2.4    46.5    +      -       -      -
     23D  GLU*     2.9    42.4    +      -       -      +
     24D  PHE      3.0     5.8    +      -       -      +
     26D  THR*     1.3    80.4    -      -       -      +
     28D  GLU*     1.3    62.2    +      -       -      +
     30D  ALA*     3.7    10.6    -      -       -      +
     61K  GLN*     3.1    25.6    +      -       +      +
     62K  PHE      3.3    20.8    +      -       -      +
     63K  ALA*     3.6    19.3    -      -       +      +
     64K  TRP*     4.0    20.0    -      -       -      +
     23d  VAL*     5.5     2.2    -      -       -      +
     46d  TYR*     5.3     2.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 28 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     24D  PHE*     3.0    15.7    +      -       +      +
     25D  LEU*     4.7     1.9    -      -       -      +
     27D  ARG*     1.3    75.3    -      -       -      +
     29D  LEU*     1.3    70.4    +      -       +      +
     30D  ALA*     3.2     8.0    +      -       -      +
     31D  GLU*     4.5     5.0    +      -       -      +
     32D  ASP*     5.6     0.2    -      -       -      -
     65D  ARG*     4.0    34.8    +      -       -      +
     69D  LEU*     3.3    23.7    -      -       -      +
     61K  GLN*     3.4    28.9    -      -       +      +
     70K  TYR*     3.3    37.8    +      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 29 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     25D  LEU*     2.9    42.8    +      -       +      +
     28D  GLU*     1.3    88.6    -      -       +      +
     30D  ALA*     1.3    63.6    +      -       -      +
     31D  GLU      3.1     3.4    -      -       -      -
     32D  ASP*     2.9    39.9    +      -       +      +
     34D  TYR*     3.5    30.1    +      -       +      +
     50D  ILE*     4.0    24.2    -      -       +      -
     58D  VAL*     4.1    19.1    -      -       +      +
     65D  ARG*     4.1     9.9    -      -       -      +
     69D  LEU*     4.7    11.2    -      -       +      -
----------------------------------------------------------
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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