Contacts of the helix formed by residues 56 - 78 (chain X) in PDB entry 6CP3


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 56 (chain X).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     57U  ASP      4.9     2.2    -      -       -      -
     58U  GLY*     3.7    16.0    -      -       -      -
     47X  THR      5.3     4.0    -      -       -      -
     49X  ASN*     2.4    43.1    +      -       -      -
     52X  LYS*     4.7     6.2    -      -       -      +
     54X  ILE*     3.9     1.5    -      -       -      +
     55X  GLY*     1.3    77.4    +      -       -      +
     57X  ARG*     1.3    59.6    +      -       -      +
     58X  TRP*     3.2     4.9    -      -       -      -
     59X  LEU*     2.7    30.8    +      -       -      +
     60X  ILE*     3.0     7.7    +      -       -      +
     85Z  MET*     3.7    11.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 57 (chain X). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     58U  GLY*     5.0     7.6    +      -       -      +
     59U  ASP      4.9     1.2    +      -       -      -
     60U  ASN      3.9     9.1    +      -       -      -
     61U  ALA*     3.4    47.9    +      -       +      +
     62U  SER*     5.0     2.2    +      -       -      +
     56X  SER*     1.3    76.4    -      -       -      +
     58X  TRP*     1.3    64.1    +      -       +      +
     59X  LEU      3.4     0.2    +      -       -      -
     60X  ILE*     3.6    16.0    +      -       -      +
     77Z  TYR*     3.3    43.8    +      -       +      -
     78Z  LYS*     3.0    55.5    +      -       -      +
     81Z  ALA*     3.7    25.6    -      -       +      +
     82Z  ASP*     4.9    10.5    -      -       -      +
     85Z  MET*     4.0     8.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with TRP 58 (chain X). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     55U  TYR      3.8     1.6    +      -       -      -
     56U  PHE*     3.6    51.0    -      +       +      -
     57U  ASP      4.5     4.3    -      -       -      -
     61U  ALA*     3.4    34.6    -      -       +      +
     62U  SER      3.2    24.9    -      -       -      -
     63U  GLY*     3.9     7.6    -      -       -      -
     65U  PRO*     4.5     1.6    -      -       +      -
     66U  LEU*     3.6    44.2    -      -       +      -
     43X  LEU      4.5     3.1    -      -       -      +
     47X  THR*     3.3    37.7    +      -       +      +
     56X  SER*     3.2     1.9    -      -       -      -
     57X  ARG*     1.3    78.3    -      -       +      +
     59X  LEU*     1.3    59.7    +      -       -      +
     60X  ILE      3.5     0.2    -      -       -      -
     61X  SER*     3.8    18.5    -      -       -      -
     62X  GLN*     4.5     1.6    +      -       -      +
     77Z  TYR*     6.5     0.4    -      +       -      -
----------------------------------------------------------
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Residues in contact with LEU 59 (chain X). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     348  MET*     5.5     5.4    -      -       +      -
     358  ILE*     5.2    11.4    -      -       +      -
     388  LEU*     3.7    30.5    -      -       +      -
     43X  LEU      5.3     0.2    -      -       -      +
     44X  TYR*     5.2    10.8    -      -       +      +
     47X  THR*     3.6    20.3    +      -       +      +
     48X  ASN*     4.7    20.2    -      -       +      +
     49X  ASN*     5.6     2.5    -      -       -      +
     52X  LYS      5.0     3.4    -      -       -      +
     55X  GLY*     3.8    21.8    -      -       -      -
     56X  SER*     2.7    17.4    +      -       -      +
     58X  TRP*     1.3    76.5    -      -       -      +
     60X  ILE*     1.3    58.4    +      -       -      +
     61X  SER      3.1     2.9    +      -       -      -
     62X  GLN*     3.3    11.7    +      -       +      +
     63X  GLU*     2.9    31.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 60 (chain X). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    1707  LEU*     4.5    14.8    -      -       +      -
     55X  GLY      3.4     9.4    -      -       -      +
     56X  SER      3.0     8.3    +      -       -      +
     57X  ARG*     3.8    12.1    -      -       -      +
     58X  TRP      3.5     0.4    -      -       -      -
     59X  LEU*     1.3    74.5    -      -       -      +
     61X  SER*     1.3    58.8    +      -       -      +
     63X  GLU*     3.3     9.3    -      -       +      +
     64X  ALA*     2.9    29.7    +      -       +      +
     77Z  TYR*     4.2     8.1    -      -       +      +
     80Z  PHE*     4.7    19.7    -      -       +      -
     81Z  ALA*     3.7    30.7    -      -       +      +
     84Z  ARG*     4.8    16.8    -      -       +      -
     85Z  MET*     3.7    27.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 61 (chain X). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     43X  LEU*     5.4     3.1    -      -       -      +
     57X  ARG      4.9     0.2    -      -       -      -
     58X  TRP*     3.8    16.3    +      -       -      -
     60X  ILE*     1.3    79.0    -      -       -      +
     62X  GLN*     1.3    67.0    +      -       -      +
     64X  ALA*     3.2     4.1    +      -       -      +
     65X  ILE*     3.0    44.0    +      -       -      +
     77Z  TYR*     3.7    18.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 62 (chain X). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     358  ILE*     4.4     9.5    -      -       +      +
     43X  LEU*     3.7    44.4    -      -       +      +
     44X  TYR*     2.4    53.3    +      -       +      -
     58X  TRP      5.0     2.7    -      -       -      +
     59X  LEU*     3.3    10.9    +      -       +      +
     61X  SER*     1.3    80.0    +      -       -      +
     63X  GLU*     1.3    59.1    +      -       -      +
     65X  ILE*     3.5    26.0    -      -       -      +
     66X  TYR*     2.8    30.7    +      -       -      +
     90X  PHE*     4.1     7.7    -      -       +      -
     94X  MET*     3.8    11.8    -      -       -      +
     97X  PHE*     5.8     1.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 63 (chain X). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    1637  TYR*     4.0     7.3    +      -       -      -
    1707  LEU*     3.7    25.7    -      -       +      +
     358  ILE*     3.6    22.0    -      -       -      +
     388  LEU*     5.1     6.9    -      -       -      +
     398  TYR*     2.8    36.0    +      -       -      +
     428  ARG*     4.4    14.4    +      -       -      +
     59X  LEU*     2.9    18.6    +      -       -      +
     60X  ILE*     3.3    16.2    -      -       +      +
     61X  SER      3.2     0.2    -      -       -      -
     62X  GLN*     1.3    77.1    -      -       -      +
     64X  ALA*     1.3    58.4    +      -       -      +
     66X  TYR*     3.3     6.4    +      -       -      +
     67X  ASP*     3.0    35.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 64 (chain X). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    1707  LEU*     3.7    27.1    -      -       +      +
    1717  ASN*     3.9     6.7    -      -       -      +
    1727  VAL*     5.6     5.8    -      -       +      +
     60X  ILE*     2.9    20.5    +      -       +      +
     61X  SER*     3.7     4.7    -      -       -      +
     63X  GLU*     1.3    73.7    -      -       -      +
     65X  ILE*     1.3    59.4    +      -       +      +
     67X  ASP*     3.4     3.0    +      -       -      +
     68X  THR*     2.9    32.4    +      -       -      +
     80Z  PHE*     5.9     3.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 65 (chain X). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     61X  SER*     3.0    28.7    +      -       -      +
     62X  GLN*     3.5    32.5    -      -       -      +
     64X  ALA*     1.3    75.2    -      -       +      +
     66X  TYR*     1.3    64.7    +      -       -      +
     68X  THR*     3.3     8.7    -      -       +      +
     69X  ILE*     3.0    44.9    +      -       +      +
     90X  PHE*     3.9    13.2    -      -       +      -
     93X  PHE*     4.4     8.3    -      -       +      -
     94X  MET*     4.0    14.6    -      -       +      -
     97X  PHE*     4.7    20.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 66 (chain X). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    1587  TRP*     3.2    42.7    +      +       -      +
    1607  VAL*     6.4     0.7    -      -       +      -
     328  LEU*     4.5    20.6    -      -       +      -
     358  ILE*     4.9    16.2    -      -       +      -
     368  LEU*     4.1     8.1    -      -       +      +
     398  TYR*     3.3    41.7    -      +       -      +
     62X  GLN      2.8    19.3    +      -       -      +
     63X  GLU*     3.4     6.1    -      -       -      +
     65X  ILE*     1.3    76.9    -      -       -      +
     67X  ASP*     1.3    59.9    +      -       -      +
     69X  ILE*     3.4     3.0    +      -       -      +
     70X  MET*     2.9    48.6    +      -       +      +
     86X  PHE*     3.4    31.2    -      +       -      -
     90X  PHE*     4.7    13.9    -      +       +      -
----------------------------------------------------------
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Residues in contact with ASP 67 (chain X). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    1637  TYR*     5.4     2.5    -      -       -      -
    1687  GLY      4.6     0.9    -      -       -      +
    1697  ASN*     2.9    35.1    -      -       -      +
    1707  LEU*     3.8    10.0    -      -       -      +
    1717  ASN*     3.2    13.2    +      -       +      +
     398  TYR*     2.6    33.6    +      -       -      -
     63X  GLU*     3.0    19.4    +      -       -      +
     64X  ALA*     4.0     4.0    -      -       -      +
     65X  ILE      3.3     0.2    -      -       -      -
     66X  TYR*     1.3    80.9    -      -       -      +
     68X  THR*     1.3    58.7    +      -       -      +
     70X  MET*     3.8    13.2    -      -       -      +
     71X  ASN*     2.9    31.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 68 (chain X). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    1717  ASN*     3.4    19.1    -      -       -      +
    1727  VAL*     4.5     9.6    +      -       +      +
    1737  MET*     3.3    38.2    +      -       -      +
     64X  ALA      2.9    18.2    +      -       -      +
     65X  ILE*     3.3    21.3    -      -       +      +
     67X  ASP*     1.3    76.5    -      -       -      +
     69X  ILE*     1.3    64.0    +      -       +      +
     72X  MET*     3.3     7.3    -      -       -      +
     93X  PHE*     6.1     3.8    -      -       +      -
    232X  TYR*     4.3    13.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 69 (chain X). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65X  ILE*     3.0    24.4    +      -       +      +
     66X  TYR      4.1     2.7    -      -       -      +
     68X  THR*     1.3    84.6    -      -       +      +
     70X  MET*     1.3    60.5    +      -       -      +
     72X  MET*     3.3    19.8    -      -       +      +
     73X  THR*     2.9    30.7    +      -       -      +
     86X  PHE*     3.8    18.8    -      -       +      -
     89X  ILE*     4.5    16.8    -      -       +      +
     90X  PHE*     3.6    29.4    -      -       +      -
     93X  PHE*     3.7    38.8    -      -       +      -
    232X  TYR*     5.7     3.8    -      -       +      -
    235X  ALA*     6.3     0.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 70 (chain X). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    1587  TRP*     4.0     5.4    -      -       +      +
    1597  ASP*     3.4    41.3    -      -       -      +
    1607  VAL*     3.9    10.3    -      -       +      +
    1637  TYR*     6.1     4.3    -      -       +      -
     398  TYR*     5.4     3.8    -      -       +      -
     66X  TYR*     2.9    35.4    +      -       +      +
     67X  ASP*     3.3    22.0    +      -       -      +
     69X  ILE*     1.3    77.1    -      -       -      +
     71X  ASN*     1.3    66.4    +      -       -      +
     73X  THR      3.9     0.2    -      -       -      -
     74X  LYS*     3.0    35.8    +      -       +      +
     82X  TRP*     4.0    15.1    -      -       +      -
     86X  PHE*     3.8    17.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 71 (chain X). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    1647  LYS*     5.8     1.7    +      -       -      -
    1697  ASN*     3.7    27.5    -      -       -      +
    1717  ASN*     3.0    28.6    +      -       -      +
    1737  MET*     3.7    12.4    -      -       +      +
     67X  ASP*     2.9    18.9    +      -       -      +
     70X  MET*     1.3    81.0    -      -       -      +
     72X  MET*     1.3    65.6    +      -       -      +
     74X  LYS*     4.3    19.7    +      -       -      +
     75X  GLY*     4.0     9.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with MET 72 (chain X). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    1737  MET*     3.3     9.4    -      -       +      +
     68X  THR      3.3    19.5    -      -       -      +
     69X  ILE*     3.3    21.4    +      -       +      +
     70X  MET      3.1     0.4    -      -       -      -
     71X  ASN*     1.3    81.6    -      -       -      +
     73X  THR*     1.3    77.3    +      -       -      +
     74X  LYS      3.2     0.5    +      -       -      -
     75X  GLY      3.3     1.2    +      -       -      -
     76X  GLN*     2.9    42.3    +      -       +      +
     89X  ILE*     3.9    28.5    -      -       +      -
    232X  TYR*     3.3    29.6    -      -       +      +
    235X  ALA*     4.2    18.6    -      -       +      +
    236X  ILE*     3.7    19.7    -      -       +      -
    239X  ALA*     4.0     7.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with THR 73 (chain X). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     69X  ILE      2.9    23.2    +      -       -      +
     70X  MET      4.0     0.2    -      -       -      +
     72X  MET*     1.3    87.0    -      -       -      +
     74X  LYS*     1.3    65.6    +      -       -      +
     76X  GLN*     3.7     7.0    -      -       -      +
     77X  ILE*     3.3    40.2    +      -       -      +
     82X  TRP*     3.6    13.7    +      -       +      -
     85X  TYR      5.9     0.3    -      -       -      -
     86X  PHE*     3.5    29.3    +      -       +      -
     89X  ILE*     4.5    15.0    -      -       +      +
    239X  ALA*     4.7     4.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 74 (chain X). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    1597  ASP*     3.8    27.9    +      -       -      +
     70X  MET*     3.0    21.6    +      -       +      +
     71X  ASN*     4.7    17.3    +      -       -      +
     73X  THR*     1.3    77.9    -      -       -      +
     75X  GLY*     1.3    63.2    +      -       -      +
     77X  ILE*     4.7     0.2    -      -       -      +
     78X  GLY*     3.0    31.9    +      -       -      -
     82X  TRP*     3.6    38.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 75 (chain X). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45T  ASP*     4.3    25.5    -      -       -      +
     71X  ASN      4.0     6.9    +      -       -      -
     72X  MET      3.3     5.9    +      -       -      -
     74X  LYS*     1.3    80.5    -      -       -      +
     76X  GLN*     1.3    71.9    +      -       -      +
     78X  GLY*     4.5     2.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 76 (chain X). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45T  ASP*     5.3     2.3    -      -       -      +
     48T  PHE*     3.4    34.6    -      -       -      -
     52T  ILE*     5.6     2.0    -      -       -      +
     72X  MET*     2.9    40.0    +      -       +      +
     73X  THR*     3.8     8.3    -      -       -      -
     74X  LYS      3.2     0.8    -      -       -      -
     75X  GLY*     1.3    84.3    -      -       -      +
     77X  ILE*     1.3    66.1    +      -       +      +
    236X  ILE*     3.6    25.5    +      -       +      +
    239X  ALA*     4.1    14.1    -      -       +      -
    240X  SER*     4.7    12.9    -      -       -      +
    243X  LYS*     3.2    30.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 77 (chain X). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     73X  THR*     3.3    29.8    +      -       -      +
     76X  GLN*     1.3    78.2    -      -       +      +
     78X  GLY*     1.3    64.3    +      -       -      +
     79X  GLY*     3.1     4.6    +      -       -      +
     81X  ASN      5.1     0.9    -      -       -      +
     82X  TRP*     3.3    40.4    -      -       +      +
     85X  TYR*     5.1    13.2    -      -       +      -
     86X  PHE      5.8     0.2    -      -       -      +
    239X  ALA*     3.4    29.4    -      -       -      +
    242X  LEU*     4.7     9.0    -      -       +      -
    243X  LYS*     3.7    33.9    -      -       +      +
    247X  TYR*     4.3    10.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 78 (chain X). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     74X  LYS      3.0    21.2    +      -       -      -
     75X  GLY*     5.1     2.2    -      -       -      -
     76X  GLN      3.5     1.5    -      -       -      -
     77X  ILE*     1.3    78.9    -      -       -      +
     79X  GLY*     1.3    64.1    +      -       -      +
     80X  LYS      3.8     0.9    +      -       -      -
     82X  TRP*     5.0     1.6    -      -       -      -
    247X  TYR*     4.9     1.4    -      -       -      -
----------------------------------------------------------
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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