Contacts of the helix formed by residues 4 - 32 (chain A) in PDB entry 6FWF


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 TYR 4 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      3A  GLN*     1.3    89.5    -      -       +      +
      5A  LYS*     1.3    62.9    +      -       -      +
      6A  LYS*     3.2    10.3    +      -       +      +
      7A  LEU*     3.5    37.8    +      -       +      +
      8A  TRP      4.0     1.0    +      -       -      -
    447A  VAL*     6.0     5.2    -      -       +      -
    448A  ASP*     3.1    18.9    +      -       -      +
    449A  LYS*     4.3     1.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 5 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      2A  GLY*     4.5    22.2    -      -       -      +
      3A  GLN      3.7     1.8    -      -       -      +
      4A  TYR*     1.3    73.2    -      -       -      +
      6A  LYS*     1.3    76.7    +      -       +      +
      7A  LEU      3.4     0.2    -      -       -      -
      8A  TRP*     3.4    13.5    -      -       +      +
      9A  TYR*     2.8    59.7    +      -       +      +
    448A  ASP*     3.5    12.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 6 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      4A  TYR*     3.2     7.9    -      -       +      +
      5A  LYS*     1.3    92.7    -      -       +      +
      7A  LEU*     1.3    55.7    +      -       +      +
      9A  TYR*     3.1    31.7    +      -       +      +
     10A  LEU*     2.8    37.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 7 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      4A  TYR*     3.5    32.4    +      -       +      +
      5A  LYS      3.4     0.2    -      -       -      -
      6A  LYS*     1.3    77.3    -      -       +      +
      8A  TRP*     1.3    61.6    +      -       -      +
     10A  LEU*     3.5    36.5    -      -       +      +
     11A  LEU*     3.9     3.5    +      -       -      +
    449A  LYS*     3.8    30.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with TRP 8 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      5A  LYS*     3.4    22.5    +      -       +      +
      7A  LEU*     1.3    77.9    -      -       -      +
      9A  TYR*     1.3    88.8    +      +       -      +
     11A  LEU*     3.3     6.2    +      -       +      +
     12A  PHE*     2.8    67.1    +      +       +      +
    448A  ASP*     4.2     7.2    -      -       +      +
    449A  LYS*     3.5    37.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 9 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      5A  LYS*     2.8    58.1    +      -       +      +
      6A  LYS*     3.1    35.0    +      -       +      +
      8A  TRP*     1.3    96.1    -      +       -      +
     10A  LEU*     1.3    58.3    +      -       -      +
     11A  LEU      3.4     0.2    -      -       -      -
     12A  PHE*     3.7    26.6    -      +       -      -
     13A  ALA*     2.8    32.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 10 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6A  LYS      2.8    20.9    +      -       -      +
      7A  LEU*     3.5    36.8    -      -       +      +
      8A  TRP      3.2     0.4    -      -       -      -
      9A  TYR*     1.3    75.6    -      -       -      +
     11A  LEU*     1.3    61.1    +      -       -      +
     13A  ALA*     3.9     3.1    -      -       -      +
     14A  VAL*     3.6    24.1    +      -       -      +
    529A  ALA*     5.7     2.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 11 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      7A  LEU      3.9     3.7    +      -       -      +
      8A  TRP*     3.3     6.3    +      -       +      +
     10A  LEU*     1.3    76.2    -      -       -      +
     12A  PHE*     1.3    57.0    +      -       -      +
     14A  VAL*     3.2    16.3    -      -       +      +
     15A  LEU*     2.8    53.8    +      -       +      +
    449A  LYS*     4.2    15.7    -      -       -      +
    454A  ILE*     4.1    26.7    -      -       +      -
    457A  ALA*     5.6     6.3    -      -       +      -
    528A  ALA*     5.7     4.5    -      -       +      +
    529A  ALA*     4.9    19.3    -      -       +      +
    532A  MET*     4.8    19.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 12 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8A  TRP*     2.8    59.0    +      +       +      +
      9A  TYR*     3.7    29.6    -      +       +      -
     10A  LEU      3.5     0.2    -      -       -      -
     11A  LEU*     1.3    73.2    -      -       -      +
     13A  ALA*     1.3    59.0    +      -       -      +
     15A  LEU*     4.0     9.4    -      -       +      +
     16A  ALA*     2.8    46.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 13 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      9A  TYR      2.8    22.8    +      -       -      +
     10A  LEU*     3.9     4.9    -      -       -      +
     12A  PHE*     1.3    74.2    -      -       -      +
     14A  VAL*     1.3    58.4    +      -       +      +
     16A  ALA*     3.3     3.5    +      -       -      +
     17A  VAL*     2.8    45.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 14 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     10A  LEU      3.6    14.1    +      -       -      +
     11A  LEU*     3.2    26.2    -      -       +      +
     13A  ALA*     1.3    79.1    -      -       +      +
     15A  LEU*     1.3    56.8    +      -       -      +
     17A  VAL*     3.3    10.0    -      -       +      +
     18A  CYS*     2.8    38.5    +      -       -      +
    529A  ALA*     4.2    20.4    -      -       +      +
    532A  MET*     5.2     2.2    -      -       +      -
    533A  LEU*     3.7    40.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 15 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     11A  LEU*     2.8    33.6    +      -       +      +
     12A  PHE*     4.0     9.9    -      -       +      +
     14A  VAL*     1.3    72.7    -      -       -      +
     16A  ALA*     1.3    59.7    +      -       -      +
     18A  CYS*     3.3    11.2    -      -       -      -
     19A  PHE*     2.8    74.2    +      -       +      +
    532A  MET*     4.2    26.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 16 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     12A  PHE*     2.8    41.9    +      -       +      +
     13A  ALA*     3.8     3.4    -      -       -      +
     15A  LEU*     1.3    72.2    -      -       -      +
     17A  VAL*     1.3    56.4    +      -       +      +
     19A  PHE*     3.7     4.9    -      -       -      +
     20A  THR*     2.7    39.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 17 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     13A  ALA*     2.8    29.6    +      -       +      +
     14A  VAL*     3.3    14.6    -      -       +      +
     16A  ALA*     1.3    72.2    -      -       +      +
     18A  CYS*     1.3    62.1    +      -       -      +
     20A  THR*     3.7     6.0    -      -       -      -
     21A  ILE*     2.8    45.4    +      -       +      +
    533A  LEU*     4.1    14.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with CYS 18 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     14A  VAL      2.8    22.9    +      -       -      +
     15A  LEU*     3.3    22.2    -      -       -      -
     17A  VAL*     1.3    75.0    -      -       +      +
     19A  PHE*     1.3    66.9    +      -       -      +
     21A  ILE*     3.8     8.9    -      -       -      +
     22A  LEU*     2.8    33.1    +      -       -      +
    532A  MET      3.6    18.4    -      -       -      +
    533A  LEU*     4.9     3.8    -      -       +      +
    536A  VAL*     3.4    24.6    -      -       +      +
    537A  PRO*     3.9    20.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 19 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     15A  LEU*     2.8    59.5    +      -       +      +
     16A  ALA*     4.0     4.5    -      -       -      +
     18A  CYS*     1.3    78.5    -      -       -      +
     20A  THR*     1.3    60.8    +      -       -      +
     22A  LEU*     4.7     1.1    -      -       +      -
     23A  GLY*     2.8    28.4    +      -       -      +
    465A  PHE*     3.6    38.8    -      +       -      -
    487A  TRP*     4.4    19.5    -      +       -      -
    491A  LEU*     6.1     0.7    -      -       +      -
    532A  MET*     6.4     0.7    -      -       -      -
    536A  VAL*     4.2    17.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 20 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     16A  ALA*     2.7    29.7    +      -       -      +
     17A  VAL*     3.7     7.7    -      -       -      -
     18A  CYS      3.3     0.2    -      -       -      -
     19A  PHE*     1.3    70.4    -      -       -      +
     21A  ILE*     1.3    62.3    +      -       +      +
     24A  TYR*     2.8    45.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 21 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     17A  VAL*     2.8    38.0    +      -       +      +
     18A  CYS*     3.8     7.2    -      -       -      +
     20A  THR*     1.3    73.7    -      -       +      +
     22A  LEU*     1.3    58.0    +      -       -      +
     24A  TYR*     5.2     0.9    -      -       -      -
     25A  MET*     2.8    44.0    +      -       +      +
    533A  LEU*     6.2     0.4    -      -       +      -
    537A  PRO*     3.8    10.3    -      -       +      -
    540A  LEU*     5.9     0.2    -      -       +      -
    555A  ILE*     3.4    44.2    -      -       +      -
    559A  PHE*     3.7    28.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 22 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18A  CYS      2.8    21.5    +      -       -      +
     19A  PHE*     4.7     2.5    -      -       +      +
     21A  ILE*     1.3    75.4    -      -       -      +
     23A  GLY*     1.3    56.8    +      -       -      +
     25A  MET*     4.9     2.2    -      -       -      -
     26A  GLY*     2.8    24.0    +      -       -      +
    483A  TYR*     3.7    10.5    +      -       +      -
    487A  TRP*     3.3    32.8    -      -       +      +
    491A  LEU*     3.5    27.8    -      -       +      -
    536A  VAL*     3.1    37.9    -      -       +      +
    537A  PRO*     4.4     5.6    -      -       +      -
    539A  THR*     4.1     4.7    -      -       +      -
    540A  LEU*     4.1    24.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 23 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     19A  PHE      2.8    26.0    +      -       -      -
     20A  THR*     5.0     0.2    -      -       -      -
     22A  LEU*     1.3    74.5    -      -       -      +
     24A  TYR*     1.3    52.0    +      -       -      +
     26A  GLY*     3.5     1.6    -      -       -      -
     27A  SER*     2.8    28.6    +      -       -      -
    483A  TYR*     4.3     8.3    +      -       -      -
    487A  TRP*     5.2     5.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 24 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     20A  THR*     2.8    32.6    +      -       +      +
     21A  ILE*     4.4     0.9    -      -       -      +
     23A  GLY*     1.3    69.4    -      -       -      +
     25A  MET*     1.3    66.0    +      -       +      +
     26A  GLY      3.1     0.9    -      -       -      -
     27A  SER*     3.2    17.1    +      -       -      +
     28A  GLU*     2.8    37.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with MET 25 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     21A  ILE*     2.8    30.7    +      -       +      +
     22A  LEU      4.7     0.2    -      -       -      +
     24A  TYR*     1.3    76.5    -      -       +      +
     26A  GLY*     1.3    52.0    +      -       -      +
     28A  GLU*     3.3    18.5    -      -       -      +
     29A  VAL*     2.8    38.1    +      -       -      +
    540A  LEU*     4.4    15.0    -      -       +      -
    551A  ALA*     3.8    29.6    -      -       +      -
    552A  SER*     3.7    13.0    -      -       -      +
    555A  ILE*     4.0    35.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 26 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     22A  LEU*     2.8    23.8    +      -       -      +
     23A  GLY      3.5     3.4    -      -       -      -
     24A  TYR      3.1     0.2    -      -       -      -
     25A  MET*     1.3    75.1    -      -       -      +
     27A  SER*     1.3    53.9    +      -       -      +
     29A  VAL*     3.5     5.3    -      -       -      +
     30A  TYR*     2.8    33.3    +      -       -      +
    483A  TYR*     3.3    29.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with SER 27 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     23A  GLY      2.8    16.3    +      -       -      -
     24A  TYR*     3.2    25.1    +      -       -      -
     26A  GLY*     1.3    72.6    -      -       -      +
     28A  GLU*     1.3    54.5    -      -       -      +
     30A  TYR*     3.6    11.6    -      -       -      +
     31A  LYS*     2.8    42.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 28 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     24A  TYR*     2.8    27.8    +      -       +      +
     25A  MET*     3.3    26.7    -      -       -      +
     26A  GLY      3.3     0.2    -      -       -      -
     27A  SER*     1.3    76.2    -      -       -      +
     29A  VAL*     1.3    57.4    +      -       -      +
     31A  LYS*     4.6    11.6    +      -       -      +
     32A  LYS*     2.8    68.0    +      -       -      +
    549A  THR*     3.6    25.4    +      -       +      +
    551A  ALA*     4.9     4.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 29 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     25A  MET      2.8    22.9    +      -       -      +
     26A  GLY      3.5    12.1    -      -       -      +
     28A  GLU*     1.3    72.5    -      -       -      +
     30A  TYR*     1.3    59.9    +      -       -      +
     32A  LYS      4.0    11.4    -      -       -      +
    479A  ALA*     4.0    18.8    -      -       +      +
    480A  VAL*     4.0    11.0    +      -       -      +
    483A  TYR*     3.6    36.3    -      -       +      -
    540A  LEU*     5.6     4.0    -      -       +      -
    543A  LEU*     5.0     7.9    -      -       +      -
    547A  GLY      5.1     2.0    -      -       -      +
    548A  SER*     3.7    32.3    -      -       -      +
    549A  THR      4.8     1.6    -      -       -      +
    552A  SER*     3.7    14.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 30 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     26A  GLY      2.8    18.7    +      -       -      +
     27A  SER*     3.6    13.0    -      -       -      +
     28A  GLU      3.3     0.2    -      -       -      -
     29A  VAL*     1.3    76.8    -      -       -      +
     31A  LYS*     1.3    64.5    +      -       +      +
    480A  VAL*     3.7    42.3    -      -       +      +
    483A  TYR*     5.8     3.1    -      +       +      -
    484A  TRP*     5.4     3.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 31 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     27A  SER*     2.8    24.3    +      -       -      +
     28A  GLU*     4.1     9.4    +      -       -      +
     30A  TYR*     1.3    82.4    -      -       +      +
     32A  LYS*     1.3    78.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 32 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     28A  GLU*     2.8    58.4    +      -       -      +
     29A  VAL*     4.0    11.6    -      -       -      +
     31A  LYS*     1.3    93.0    -      -       +      +
     35A  PRO*     6.5     1.1    -      -       -      -
    204A  ARG*     5.8     8.5    -      -       -      +
    211A  TYR*     6.1     5.2    -      -       -      -
    479A  ALA*     5.5     3.4    -      -       -      +
    547A  GLY      3.0    24.8    -      -       -      +
    549A  THR*     4.1    26.6    +      -       -      +
----------------------------------------------------------
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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