Contacts of the helix formed by residues 913 - 940 (chain C) in PDB entry 7CN9


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 GLN 913 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1089B  PHE*     4.2    14.2    -      -       +      -
   1090B  PRO*     4.8    14.2    +      -       +      +
   1092B  GLU*     3.2    12.8    +      -       -      +
   1107B  ARG*     3.0    32.5    +      -       -      +
    900C  MET*     4.1     3.1    -      -       -      +
    903C  ALA*     3.0    52.7    +      -       +      +
    904C  TYR*     3.7     9.2    +      -       -      +
    906C  PHE*     4.4     6.3    -      -       -      -
    907C  ASN*     4.3     8.0    -      -       +      +
    911C  VAL      3.4     1.9    +      -       -      -
    912C  THR*     1.3    74.9    -      -       +      +
    914C  ASN*     1.3    64.2    +      -       -      +
    915C  VAL      3.1     0.4    -      -       -      -
    916C  LEU*     2.9    22.5    +      -       -      +
    917C  TYR*     3.4     7.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 914 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1089B  PHE*     3.3    37.8    -      -       +      -
   1121B  PHE*     5.3     2.8    -      -       +      -
   1123B  SER*     3.3    17.4    +      -       -      -
    911C  VAL*     5.3     1.4    -      -       -      +
    912C  THR*     2.8    24.8    +      -       +      +
    913C  GLN*     1.3    76.9    -      -       -      +
    915C  VAL*     1.3    83.9    +      -       -      +
    917C  TYR*     3.0    12.3    +      -       -      +
    918C  GLU*     2.6    37.0    +      -       -      +
   1109C  PHE*     5.8     2.3    -      -       -      -
   1111C  GLU*     6.2     1.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 915 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    718C  PHE*     4.6    19.7    -      -       +      -
    906C  PHE*     3.9    12.8    -      -       +      -
    911C  VAL*     3.6    29.8    -      -       +      -
    912C  THR      3.1    17.7    -      -       -      +
    914C  ASN*     1.3    88.3    +      -       -      +
    916C  LEU*     1.3    70.7    +      -       -      +
    918C  GLU*     2.9    11.9    +      -       -      +
    919C  ASN*     2.8    34.1    +      -       +      +
   1109C  PHE*     5.2    20.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 916 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    899C  ALA*     4.3     5.2    -      -       +      +
    902C  MET*     3.5    25.6    -      -       +      -
    903C  ALA*     3.4    30.3    -      -       -      +
    906C  PHE*     3.4    31.6    -      -       +      -
    913C  GLN      2.9    14.8    +      -       -      +
    915C  VAL*     1.3    76.2    -      -       -      +
    917C  TYR*     1.3    61.4    +      -       +      +
    919C  ASN*     2.9     2.1    +      -       -      +
    920C  GLN*     2.6    50.4    +      -       +      +
    923C  ILE*     3.9    30.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 917 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1079B  PRO*     3.1    52.6    +      -       +      +
   1080B  ALA*     4.1     6.5    -      -       +      -
   1089B  PHE*     3.2    36.3    -      +       +      -
   1128B  VAL*     4.1     0.9    -      -       -      +
   1129B  VAL*     3.0    50.5    -      -       +      +
    899C  ALA*     4.3    16.4    -      -       +      -
    900C  MET*     3.2    22.7    -      -       -      +
    903C  ALA*     3.8    22.0    -      -       +      +
    913C  GLN*     3.4     8.7    +      -       -      -
    914C  ASN      3.0     3.9    +      -       -      +
    916C  LEU*     1.3    81.7    -      -       +      +
    918C  GLU*     1.3    58.1    +      -       +      +
    920C  GLN*     2.7    20.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 918 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1089B  PHE*     5.9     1.1    -      -       +      -
   1123B  SER*     3.6    10.0    +      -       -      +
   1127B  ASP*     5.4     5.6    -      -       -      +
   1128B  VAL*     4.5    14.3    -      -       +      +
   1129B  VAL*     5.2     3.8    -      -       +      -
    914C  ASN*     2.6    46.7    +      -       +      +
    915C  VAL*     2.9     7.3    +      -       -      +
    917C  TYR*     1.3    76.7    -      -       +      +
    919C  ASN*     1.3    58.3    +      -       +      +
    920C  GLN*     2.8    13.1    +      -       -      +
    921C  LYS*     5.5     0.5    -      -       -      +
    922C  LEU*     6.1     0.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 919 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    718C  PHE*     3.2    38.6    -      -       -      -
    915C  VAL*     2.8    22.5    +      -       +      +
    916C  LEU*     4.1     0.7    -      -       -      +
    918C  GLU*     1.3    76.3    -      -       +      +
    920C  GLN*     1.3    70.0    +      -       -      +
    921C  LYS*     2.8     4.8    +      -       -      -
    922C  LEU*     2.9    30.4    +      -       -      +
    923C  ILE*     3.0    17.7    +      -       +      +
    926C  GLN*     4.6     3.8    +      -       -      +
      1X  NAG      4.7    18.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 920 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1128B  VAL*     4.9    10.3    +      -       -      +
   1129B  VAL*     5.8     1.1    -      -       +      -
   1130B  ILE*     4.6    14.3    -      -       +      +
    798C  GLY      5.3     8.7    -      -       -      +
    899C  ALA*     6.4     1.6    -      -       +      -
    916C  LEU*     2.6    28.6    +      -       +      +
    917C  TYR*     2.7    21.8    +      -       +      +
    918C  GLU      4.0     5.3    +      -       -      -
    919C  ASN*     1.3    81.5    +      -       -      +
    921C  LYS*     1.3    94.6    +      -       +      +
    923C  ILE*     2.7    12.6    -      -       -      +
    924C  ALA*     2.2    40.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 921 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1128B  VAL*     5.1     6.3    +      -       -      -
   1130B  ILE*     3.8    26.9    -      -       -      +
    798C  GLY      5.4     2.9    -      -       -      +
    918C  GLU      5.5     0.7    -      -       -      +
    919C  ASN      2.8     4.2    +      -       -      +
    920C  GLN*     1.3    97.9    -      -       +      +
    922C  LEU*     1.3    62.5    +      -       +      +
    924C  ALA*     2.6    12.9    -      -       -      +
    925C  ASN*     2.5    35.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 922 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    918C  GLU      6.1     0.4    -      -       -      +
    919C  ASN*     2.9    20.1    +      -       -      +
    921C  LYS*     1.3    86.6    -      -       +      +
    923C  ILE*     1.3    58.4    +      -       -      +
    925C  ASN*     4.0    14.6    -      -       +      +
    926C  GLN*     2.3    55.8    +      -       +      +
      1X  NAG      5.8     5.6    -      -       +      +
      2X  NAG      4.0    30.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 923 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    718C  PHE*     3.6    23.8    -      -       +      -
    720C  ILE*     3.7    16.7    -      -       +      +
    800C  PHE*     5.2    10.8    -      -       +      -
    902C  MET*     5.9     3.4    -      -       +      -
    906C  PHE*     4.9     8.1    -      -       +      -
    916C  LEU*     3.9    22.0    -      -       +      -
    919C  ASN*     3.0    46.5    +      -       +      +
    920C  GLN*     2.7    15.5    +      -       -      +
    922C  LEU*     1.3    73.1    -      -       -      +
    924C  ALA*     1.3    52.7    +      -       -      +
    926C  GLN*     2.9    11.2    +      -       -      +
    927C  PHE*     2.5    44.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 924 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    798C  GLY      4.1     4.3    -      -       -      +
    799C  GLY*     3.2    36.3    -      -       -      +
    800C  PHE*     4.9     7.2    -      -       +      -
    920C  GLN      2.2    26.4    +      -       -      +
    921C  LYS*     2.6    20.6    -      -       -      +
    923C  ILE*     1.3    68.9    -      -       -      +
    925C  ASN*     1.3    50.1    +      -       -      +
    927C  PHE*     2.9     5.1    +      -       -      +
    928C  ASN*     2.4    42.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 925 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    921C  LYS      2.5    14.8    +      -       -      +
    922C  LEU*     3.5    18.8    -      -       +      +
    924C  ALA*     1.3    71.3    -      -       -      +
    926C  GLN*     1.3    56.7    +      -       -      +
    928C  ASN*     2.9     8.9    +      -       -      +
    929C  SER*     2.6    48.6    +      -       -      -
      2X  NAG      3.9    29.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 926 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    717C  ASN*     5.8     0.4    +      -       -      -
    718C  PHE*     4.4    16.7    +      -       -      -
    719C  THR*     5.2     4.1    -      -       -      +
    720C  ILE*     4.6    18.3    -      -       +      +
    919C  ASN*     4.6     4.0    +      -       -      +
    922C  LEU*     2.3    57.5    +      -       +      +
    923C  ILE*     2.9    19.9    +      -       -      +
    925C  ASN*     1.3    68.3    -      -       +      +
    927C  PHE*     1.3    53.5    +      -       -      +
    929C  SER*     3.5     4.1    -      -       -      -
    930C  ALA*     2.5    40.7    +      -       -      +
      1X  NAG      4.5    28.3    +      -       -      +
      2X  NAG      5.8     5.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 927 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    720C  ILE*     4.6    19.6    -      -       +      +
    722C  VAL*     5.6     4.5    -      -       +      -
    800C  PHE*     3.4    44.0    -      +       +      -
    801C  ASN      5.8     0.9    -      -       -      -
    802C  PHE*     4.2     7.6    -      +       -      -
    898C  PHE*     6.1     0.4    -      +       -      -
    902C  MET*     5.8     7.6    -      -       +      -
    923C  ILE*     2.5    23.7    +      -       +      +
    924C  ALA*     3.0    12.3    -      -       -      +
    926C  GLN*     1.3    72.6    -      -       -      +
    928C  ASN*     1.3    55.7    +      -       -      +
    930C  ALA*     2.9     7.7    +      -       -      +
    931C  ILE*     2.5    66.4    +      -       +      +
   1052C  PHE*     4.2    26.0    -      +       -      -
   1065C  VAL*     4.1    25.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 928 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    799C  GLY      2.3    29.9    +      -       -      +
    800C  PHE*     3.4     2.1    -      -       -      +
    801C  ASN*     2.9    41.3    +      -       +      +
    924C  ALA*     2.4    38.6    +      -       -      +
    925C  ASN*     3.5    10.0    -      -       -      +
    927C  PHE*     1.3    74.6    -      -       -      +
    929C  SER*     1.3    65.1    +      -       -      +
    931C  ILE*     2.9    26.2    +      -       -      +
    932C  GLY      3.2     3.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 929 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    925C  ASN*     2.6    32.0    +      -       -      -
    926C  GLN*     3.6     4.5    -      -       -      -
    928C  ASN*     1.3    71.9    -      -       -      +
    930C  ALA*     1.3    64.8    +      -       -      +
    931C  ILE      2.9     0.5    +      -       -      -
    932C  GLY*     3.0     4.6    +      -       -      -
    933C  LYS*     2.7    33.0    +      -       -      +
      2X  NAG      6.1     0.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 930 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    720C  ILE*     3.7    24.2    -      -       +      +
    721C  SER*     5.1     0.2    -      -       -      -
    722C  VAL*     3.2    29.5    -      -       +      +
    926C  GLN*     2.5    21.5    +      -       +      +
    927C  PHE*     3.1    10.5    -      -       -      +
    929C  SER*     1.3    71.3    -      -       -      +
    931C  ILE*     1.3    63.9    +      -       -      +
    933C  LYS*     2.7    27.2    -      -       -      +
    934C  ILE      3.5     0.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 931 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    722C  VAL*     4.5    16.4    -      -       +      -
    801C  ASN      4.5    16.6    -      -       -      +
    802C  PHE*     5.7     2.7    -      -       +      -
    804C  GLN*     3.5    23.3    -      -       +      +
    805C  ILE*     5.3    19.1    -      -       +      -
    927C  PHE*     2.5    56.8    +      -       +      +
    928C  ASN*     2.9    16.3    +      -       -      +
    930C  ALA*     1.3    74.5    -      -       -      +
    932C  GLY*     1.3    63.1    +      -       -      +
    934C  ILE*     2.9    24.8    +      -       +      +
    935C  GLN*     5.1     0.3    -      -       -      +
   1052C  PHE*     5.8     3.6    -      -       +      -
   1063C  LEU*     6.3     2.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 932 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    804C  GLN*     3.9    19.9    +      -       -      -
    928C  ASN      3.2     4.0    +      -       -      -
    929C  SER      3.0     7.5    +      -       -      -
    931C  ILE*     1.3    78.3    -      -       -      +
    933C  LYS*     1.3    49.1    +      -       -      +
    934C  ILE      2.5    13.2    +      -       -      -
    935C  GLN*     2.9    11.4    +      -       -      +
    936C  ASP*     2.6    28.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 933 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    722C  VAL*     5.1     2.5    -      -       +      -
    929C  SER*     2.7    26.0    +      -       -      +
    930C  ALA*     2.7    23.1    -      -       -      +
    932C  GLY*     1.3    70.3    -      -       -      +
    934C  ILE*     1.3    47.8    -      -       -      +
    936C  ASP*     2.6    16.0    +      -       -      +
    937C  SER*     2.2    30.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 934 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    722C  VAL*     3.9    26.0    -      -       +      +
    723C  THR*     5.5     0.4    -      -       -      -
    724C  THR*     3.5    37.9    -      -       +      +
    818C  ILE*     5.1     7.9    -      -       +      -
    930C  ALA      3.5     0.2    +      -       -      -
    931C  ILE*     2.9    20.9    +      -       -      +
    932C  GLY      2.5     7.3    +      -       -      -
    933C  LYS*     1.3    73.8    -      -       -      +
    935C  GLN*     1.3    67.3    +      -       +      +
    936C  ASP*     3.1     0.7    -      -       -      -
    937C  SER*     2.6    14.2    +      -       -      +
    938C  LEU*     2.6    55.2    +      -       +      +
   1063C  LEU*     5.8     6.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 935 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    804C  GLN*     4.8    16.9    +      -       +      +
    817C  PHE*     3.9    18.3    -      -       +      -
    818C  ILE*     3.6    17.3    -      -       +      -
    821C  LEU*     3.4    37.7    -      -       +      +
    931C  ILE      5.1     0.2    -      -       -      +
    932C  GLY*     2.9    11.3    +      -       -      +
    934C  ILE*     1.3    80.7    -      -       +      +
    936C  ASP*     1.3    76.2    +      -       -      +
    938C  LEU*     2.8     7.9    +      -       +      +
    939C  SER*     2.3    49.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 936 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    932C  GLY      2.6    24.2    +      -       -      +
    933C  LYS*     2.6    31.7    +      -       -      +
    935C  GLN*     1.3    85.8    +      -       -      +
    937C  SER*     1.3    75.8    +      -       -      -
    939C  SER*     2.9     5.4    +      -       -      +
    940C  SER*     2.6    43.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 937 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    933C  LYS*     2.2    31.0    +      -       -      -
    934C  ILE*     2.6    20.6    +      -       -      +
    936C  ASP*     1.3    86.6    +      -       -      -
    938C  LEU*     1.3    61.9    +      -       -      +
    940C  SER*     4.3     4.9    -      -       -      -
    941C  THR*     2.4    31.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 938 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    724C  THR*     4.7     9.6    -      -       +      +
    818C  ILE*     5.6     8.7    -      -       +      -
    825C  LYS*     3.1    21.4    +      -       -      +
    934C  ILE*     2.6    43.8    +      -       +      +
    935C  GLN*     3.3     8.7    -      -       -      +
    937C  SER*     1.3    82.0    -      -       -      +
    939C  SER*     1.3    63.8    +      -       -      +
    940C  SER      3.2     1.6    -      -       -      -
    941C  THR*     2.7    20.9    -      -       -      +
    944C  ALA*     3.6    31.2    -      -       +      -
    945C  LEU*     6.6     0.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 939 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    821C  LEU*     5.5     9.7    -      -       -      +
    825C  LYS*     5.2     8.4    -      -       -      +
    935C  GLN*     2.3    46.6    +      -       -      -
    936C  ASP*     3.8     4.5    -      -       -      -
    938C  LEU*     1.3    69.6    -      -       -      +
    940C  SER*     1.3    66.3    +      -       -      +
    941C  THR      4.6     0.5    -      -       -      -
    942C  ALA*     4.9     1.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 940 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    936C  ASP*     2.6    26.9    +      -       -      +
    937C  SER*     4.7     2.9    -      -       -      -
    939C  SER*     1.3    77.6    +      -       -      +
    941C  THR*     1.3    66.7    +      -       -      +
    942C  ALA*     3.5     2.9    +      -       -      +
----------------------------------------------------------
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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