Contacts of the helix formed by residues 1004 - 1026 (chain M) in PDB entry 3HOU


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 ASN1004 (chain M).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1002M  GLY*     3.2     4.8    +      -       -      -
   1003M  LYS*     1.3    80.8    -      -       -      +
   1005M  GLU*     1.3    64.2    +      -       -      +
   1006M  ILE*     3.1    10.6    +      -       -      +
   1007M  ILE*     3.0    34.7    +      -       -      +
   1008M  GLN*     2.8    33.2    +      -       -      +
    163Q  GLU*     5.2     1.8    -      -       -      +
    167Q  ARG*     3.0    51.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU1005 (chain M). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1004M  ASN*     1.3    73.9    -      -       -      +
   1006M  ILE*     1.3    69.1    +      -       +      +
   1008M  GLN*     4.2     9.2    -      -       -      +
   1009M  ASN*     2.5    46.4    +      -       -      +
   1012M  ARG*     3.6    22.7    +      -       -      -
    163Q  GLU*     5.8     1.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE1006 (chain M). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1004M  ASN*     3.1     4.1    +      -       -      +
   1005M  GLU*     1.3    80.2    -      -       +      +
   1007M  ILE*     1.3    61.3    +      -       -      +
   1009M  ASN*     3.5     6.6    +      -       -      +
   1010M  ALA*     3.1    19.8    +      -       -      +
    160Q  GLU      4.9     1.8    -      -       -      +
    163Q  GLU*     3.0    49.6    -      -       +      +
    164Q  LEU*     3.7    13.5    -      -       +      +
    167Q  ARG*     3.6    19.3    -      -       +      -
    168Q  TYR*     3.9    25.1    -      -       +      +
    211Q  TYR*     4.1    18.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE1007 (chain M). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1000M  LEU*     4.0    23.7    -      -       +      +
   1001M  ARG      4.4     0.7    -      -       -      +
   1002M  GLY*     3.9    32.3    -      -       -      +
   1004M  ASN*     3.0    29.7    +      -       -      +
   1006M  ILE*     1.3    74.8    -      -       -      +
   1008M  GLN*     1.3    61.4    +      -       -      +
   1010M  ALA*     3.0     8.3    +      -       -      +
   1011M  GLN*     2.8    26.5    +      -       -      +
    167Q  ARG*     3.8    23.8    -      -       +      +
    168Q  TYR*     4.2    24.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLN1008 (chain M). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1000M  LEU      5.5     0.6    +      -       -      -
   1001M  ARG*     3.2    14.3    +      -       -      +
   1002M  GLY      2.6    25.5    +      -       -      +
   1003M  LYS*     4.5     2.8    -      -       -      +
   1004M  ASN      2.8    34.1    +      -       -      +
   1005M  GLU*     3.8    17.0    -      -       -      +
   1007M  ILE*     1.3    74.8    -      -       -      +
   1009M  ASN*     1.3    63.1    +      -       -      +
   1011M  GLN*     3.2    18.0    -      -       -      +
   1012M  ARG*     3.1    29.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN1009 (chain M). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1005M  GLU*     2.5    53.2    +      -       -      +
   1006M  ILE*     3.6     6.3    -      -       -      +
   1008M  GLN*     1.3    70.3    -      -       -      +
   1010M  ALA*     1.3    67.4    +      -       -      +
   1012M  ARG*     2.7    49.0    +      -       -      +
   1013M  ASP*     2.9    21.5    +      -       -      +
    197Q  LYS*     5.5     9.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA1010 (chain M). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    867M  ILE*     4.7     5.7    -      -       +      +
   1000M  LEU*     3.5    19.4    -      -       +      +
   1006M  ILE      3.1    11.6    +      -       -      +
   1007M  ILE*     3.0    10.9    +      -       -      +
   1009M  ASN*     1.3    77.4    -      -       -      +
   1011M  GLN*     1.3    62.7    +      -       -      +
   1013M  ASP*     3.1    14.9    +      -       -      +
   1014M  ALA*     2.9    23.6    +      -       -      +
    168Q  TYR*     3.9    17.7    -      -       -      +
    209Q  ALA*     6.2     0.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN1011 (chain M). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    994M  GLN      5.9     0.6    +      -       -      -
    997M  LEU      3.7     5.4    +      -       -      -
    998M  LEU*     3.4    11.3    -      -       +      +
    999M  VAL*     2.9    28.7    +      -       -      -
   1000M  LEU*     3.4    27.7    +      -       +      +
   1007M  ILE*     2.8    10.8    +      -       +      +
   1008M  GLN*     3.2    24.7    -      -       -      +
   1010M  ALA*     1.3    75.8    -      -       -      +
   1012M  ARG*     1.3    67.9    +      -       +      +
   1014M  ALA*     2.9    15.8    +      -       -      +
   1015M  VAL*     2.7    43.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG1012 (chain M). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1005M  GLU*     3.6    21.4    +      -       -      -
   1008M  GLN*     3.1    19.0    +      -       -      +
   1009M  ASN*     2.7    39.8    +      -       -      +
   1011M  GLN*     1.3    86.1    -      -       +      +
   1013M  ASP*     1.3    60.0    +      -       -      +
   1015M  VAL*     3.5     3.4    +      -       -      +
   1016M  THR*     2.8    24.3    +      -       -      -
    207Q  ARG*     5.4     5.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP1013 (chain M). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1009M  ASN*     2.9    26.3    +      -       -      +
   1010M  ALA*     3.3    15.9    -      -       -      +
   1012M  ARG*     1.3    77.0    -      -       -      +
   1014M  ALA*     1.3    65.3    +      -       -      +
   1015M  VAL      2.8     1.1    +      -       -      -
   1016M  THR*     2.7    23.3    +      -       -      -
    197Q  LYS*     5.6     2.3    +      -       -      -
    205Q  SER      3.2    11.1    -      -       -      +
    207Q  ARG*     3.1    48.2    +      -       -      +
    208Q  TYR*     4.8     4.7    -      -       +      -
    209Q  ALA*     4.3    20.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA1014 (chain M). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    867M  ILE*     4.9     7.2    -      -       +      -
    870M  GLU      4.6     4.0    -      -       -      -
    871M  ASP*     4.2    18.1    -      -       -      +
    873M  MET*     5.1     4.7    -      -       -      +
    999M  VAL*     4.2    24.7    -      -       +      -
   1000M  LEU*     5.2     2.0    -      -       +      -
   1010M  ALA      2.9    12.4    +      -       -      +
   1011M  GLN*     3.2    14.4    -      -       -      +
   1013M  ASP*     1.3    76.4    -      -       -      +
   1015M  VAL*     1.3    61.5    +      -       +      +
   1016M  THR      3.5     0.2    -      -       -      -
   1018M  PHE*     5.5     1.7    +      -       -      +
    205Q  SER*     3.6    24.3    -      -       -      -
    207Q  ARG      5.1     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with VAL1015 (chain M). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    873M  MET*     6.4     0.2    -      -       -      -
    994M  GLN      5.6     1.3    -      -       -      +
    997M  LEU*     3.4    29.6    -      -       +      +
    999M  VAL*     4.3     3.1    -      -       +      -
   1011M  GLN*     2.7    36.8    +      -       -      +
   1012M  ARG*     3.9     4.5    -      -       -      +
   1013M  ASP      3.0     1.0    -      -       -      -
   1014M  ALA*     1.3    82.8    -      -       +      +
   1016M  THR*     1.3    65.1    -      -       -      +
   1017M  LEU      3.4     2.5    -      -       -      -
   1018M  PHE*     3.1    17.2    +      -       +      -
   1019M  CYS*     3.0    40.8    +      -       -      -
   1053M  PHE*     4.3    10.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR1016 (chain M). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    942M  PHE*     3.9    31.6    -      -       +      -
   1012M  ARG      2.8    15.2    +      -       -      -
   1013M  ASP*     2.7    26.7    +      -       -      -
   1014M  ALA      3.5     0.2    -      -       -      -
   1015M  VAL*     1.3    76.3    -      -       -      +
   1017M  LEU*     1.3    63.3    +      -       -      +
   1019M  CYS*     3.5     5.5    +      -       -      +
   1020M  CYS*     3.4    22.6    +      -       -      -
   1023M  ARG*     5.2     1.9    +      -       -      +
    205Q  SER      3.6     6.1    -      -       -      -
    206Q  GLY*     4.7     0.2    -      -       -      -
    207Q  ARG*     4.1    19.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU1017 (chain M). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    883M  LEU*     3.5    28.9    -      -       +      -
    942M  PHE*     5.3     0.2    -      -       -      -
    943M  LEU*     3.8    19.1    -      -       +      -
    946M  VAL*     6.2     0.7    -      -       +      -
    947M  PHE*     4.0    17.0    -      -       +      -
    954M  TRP*     5.4     1.3    -      -       +      -
    956M  LEU*     3.6    20.0    -      -       +      -
   1015M  VAL      3.4     0.4    -      -       -      -
   1016M  THR*     1.3    76.4    -      -       -      +
   1018M  PHE*     1.3    68.1    +      -       -      +
   1020M  CYS*     3.2    12.9    +      -       -      +
   1021M  LEU*     3.3     8.5    +      -       -      +
    202Q  SER      4.3     0.2    -      -       -      +
    203Q  GLU      3.7    17.0    -      -       -      +
    204Q  THR      3.5    21.3    -      -       -      +
    205Q  SER*     3.4     8.1    +      -       -      +
    206Q  GLY*     3.2    26.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE1018 (chain M). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    873M  MET*     6.1     1.1    -      -       +      -
    956M  LEU*     4.3    11.8    -      -       +      +
    957M  PRO*     3.3    42.4    -      -       +      -
    958M  VAL*     4.1    17.9    -      -       +      -
    960M  ILE*     4.3    14.6    -      -       +      -
    997M  LEU*     3.5    35.0    -      -       +      -
   1014M  ALA      5.5     1.3    +      -       -      +
   1015M  VAL*     3.1    17.0    +      -       +      +
   1017M  LEU*     1.3    78.0    -      -       -      +
   1019M  CYS*     1.3    60.7    +      -       -      +
   1021M  LEU*     2.8    41.7    +      -       +      +
   1022M  LEU*     2.8    18.6    +      -       +      -
   1049M  ILE*     4.4     9.0    -      -       +      -
   1053M  PHE*     3.8    23.6    -      +       +      -
    204Q  THR      5.6     0.2    +      -       -      -
    205Q  SER*     5.6     0.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with CYS1019 (chain M). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    994M  GLN*     4.3    28.9    -      -       -      -
    997M  LEU*     4.4     8.3    -      -       -      -
   1015M  VAL*     3.0    41.4    +      -       -      +
   1016M  THR*     3.9     4.5    -      -       -      +
   1018M  PHE*     1.3    72.2    -      -       -      +
   1020M  CYS*     1.3    67.5    +      -       -      +
   1022M  LEU*     2.9     9.3    +      -       -      +
   1023M  ARG*     2.8    50.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with CYS1020 (chain M). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    883M  LEU*     4.9     0.9    -      -       +      -
    885M  THR*     4.8     1.8    +      -       -      -
    939M  ASP*     3.9    37.2    -      -       +      +
    942M  PHE*     4.4    13.5    -      -       -      -
    943M  LEU*     3.9    36.6    -      -       +      -
   1016M  THR*     3.4    17.2    +      -       -      -
   1017M  LEU*     3.2    11.1    +      -       +      +
   1019M  CYS*     1.3    75.6    -      -       -      +
   1021M  LEU*     1.3    65.0    +      -       -      +
   1023M  ARG*     3.9     4.3    -      -       -      +
   1024M  SER*     2.8    26.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU1021 (chain M). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    881M  GLN*     3.6    34.3    -      -       +      +
    882M  SER      3.7     2.9    -      -       -      +
    883M  LEU*     3.3    32.4    -      -       +      +
    956M  LEU*     4.1    11.4    -      -       +      -
    960M  ILE*     4.3    11.2    -      -       +      -
   1017M  LEU      3.3     3.1    +      -       -      +
   1018M  PHE*     2.8    36.9    +      -       +      +
   1020M  CYS*     1.3    78.1    -      -       -      +
   1022M  LEU*     1.3    63.5    +      -       -      +
   1024M  SER*     2.8    20.3    +      -       -      -
   1025M  ARG*     3.0    47.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU1022 (chain M). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    960M  ILE*     3.8    23.3    -      -       +      +
    990M  VAL*     4.2     7.6    -      -       +      -
    993M  LEU*     3.4    30.5    -      -       +      -
    994M  GLN*     3.7    28.0    -      -       +      -
    997M  LEU*     4.0    14.4    -      -       +      -
   1018M  PHE*     2.8    12.7    +      -       +      +
   1019M  CYS*     2.9    15.5    +      -       +      +
   1021M  LEU*     1.3    74.6    -      -       -      +
   1023M  ARG*     1.3    58.5    +      -       +      +
   1025M  ARG*     2.9     6.1    +      -       -      +
   1026M  LEU*     2.8    59.8    +      -       +      +
   1049M  ILE*     3.9     7.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG1023 (chain M). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    935M  GLN*     3.1    30.2    -      -       -      +
    936M  LEU*     3.9    22.6    -      -       +      +
    939M  ASP*     2.6    49.7    +      -       -      +
    990M  VAL*     4.9    11.2    -      -       +      -
    994M  GLN*     3.1    33.8    +      -       -      +
   1016M  THR*     5.2     2.0    +      -       -      +
   1019M  CYS*     2.8    38.8    +      -       -      +
   1020M  CYS*     4.0     8.0    -      -       -      +
   1022M  LEU*     1.3    69.9    -      -       -      +
   1024M  SER*     1.3    65.8    +      -       -      +
   1025M  ARG      3.1     0.7    +      -       -      -
   1026M  LEU      3.5     9.7    +      -       -      +
   1027M  ALA*     3.5    17.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER1024 (chain M). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    883M  LEU*     4.1     3.8    -      -       -      -
    884M  ASP*     3.5    18.2    +      -       -      +
    885M  THR*     3.2    39.3    +      -       -      -
    897M  TYR*     3.1    10.1    -      -       -      -
    936M  LEU*     5.7     0.9    -      -       -      -
   1020M  CYS      2.8    14.7    +      -       -      -
   1021M  LEU*     2.8    18.8    +      -       -      -
   1023M  ARG*     1.3    77.4    -      -       -      +
   1025M  ARG*     1.3    59.8    +      -       -      +
   1030M  ARG*     2.8    26.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG1025 (chain M). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    881M  GLN*     4.2     8.8    +      -       -      +
    882M  SER*     2.7    40.2    +      -       -      +
    884M  ASP*     3.1    28.0    +      -       -      -
    960M  ILE*     4.3    23.8    -      -       +      +
    961M  ARG*     3.8    42.4    -      -       -      +
    964M  ILE*     5.6     0.2    -      -       +      -
   1021M  LEU*     3.4    30.2    -      -       +      +
   1022M  LEU      2.9     6.0    +      -       -      +
   1024M  SER*     1.3    81.3    +      -       -      +
   1026M  LEU*     1.3    60.3    +      -       +      +
   1027M  ALA      3.4     6.1    +      -       -      -
   1030M  ARG*     3.8     9.3    -      -       -      +
   1035M  TYR*     2.8    44.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU1026 (chain M). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    932M  GLU*     4.9     1.4    -      -       -      +
    960M  ILE*     5.1     1.3    -      -       +      -
    964M  ILE*     4.3    20.6    -      -       +      -
    986M  ILE*     3.9     2.9    -      -       -      +
    990M  VAL*     3.6    33.0    -      -       +      +
   1022M  LEU*     2.8    45.5    +      -       +      +
   1023M  ARG*     3.5     4.9    +      -       -      -
   1025M  ARG*     1.3    88.6    -      -       +      +
   1027M  ALA*     1.3    59.9    +      -       -      +
   1028M  THR      3.6     1.7    +      -       -      -
   1031M  VAL*     3.4    18.1    -      -       +      +
   1035M  TYR*     4.4     3.4    -      -       +      -
   1037M  LEU*     5.8     1.6    -      -       +      -
   1042M  PHE*     4.9     8.5    -      -       +      -
   1045M  VAL*     4.9     9.2    -      -       +      -
   1046M  LEU*     4.0    20.6    -      -       +      -
   1049M  ILE*     4.0    13.7    -      -       +      -
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


   I  Hydrophilic      - N and O that can donate and accept hydrogen bonds
                         (e.g., oxygen of hydroxyl group of Ser. or Thr)
  II  Acceptor         - N or O that can only accept a hydrogen bond
 III  Donor            - N that can only donate a hydrogen bond
  IV  Hydrophobic      - Cl, Br, I and all C atoms that are not in
                         aromatic rings and do not have a covalent bond to
                         a N or O atom
   V  Aromatic         - C in aromatic rings irrespective of any other 
                         bonds formed by the atom
  VI  Neutral          - C atoms that have a covalent bond to at least one
                         atom of class I or two or more atoms from class II
                         or III; atoms; S, F, P, and metal atoms in all cases
 VII  Neutral-donor    - C atoms that have a covalent bond with only one
                         atom of class III
VIII  Neutral-acceptor - C atoms that have a covalent bond with only 
                         one atom of class II
For each pair of contacts the state of legitimacy is shown below:

Legend:
+, legitimate
-, illegitimate
------------------------------------------------------------
  Atomic class           I  II  III   IV   V   VI  VII  VIII
------------------------------------------------------------
   I  (Hydrophilic)      +   +    +    -   +   +    +    +
  II  (Acceptor)         +   -    +    -   +   +    +    -
 III  (Donor)            +   +    -    -   +   +    -    +
  IV  (Hydrophobic)      -   -    -    +   +   +    +    +
   V  (Aromatic)         +   +    +    +   +   +    +    +
  VI  (Neutral)          +   +    +    +   +   +    +    +
 VII  (Neutral-donor)    +   +    -    +   +   +    -    +
VIII  (Neutral-acceptor) +   -    +    +   +   +    +    -
------------------------------------------------------------
Warning!
Atom classes for heterogroups are automatically assigned based on the atomic coordinates. However, in three cases (see below) the automatic assignment is currently ambiguous. In these cases, the user is advised to manually analyse the full list of contacts using LPC software.
1. Carbon atoms belonging to a 4-, 5- or 6-member ring are 
   considered "aromatic" (Class V) if the ring is approximately
   planar, and "hydrophobic" (Class IV) or "neutral" (Classes
   VI, VII, VIII) if the ring is non-planar.
2. The oxygen atom of a carbonyl or hydroxy group is considered
   "hydroxy" (Class I) if the CO bond is longer than 1.29 Å, and
   "carbonyl" (Class II) if shorter.
3. All nitrogen atoms are considered "hydrophilic" (Class I).

Please E-mail any questions and/or suggestions concerning this page to Vladimir.Sobolev@weizmann.ac.il