Contacts of the helix formed by residues 281 - 308 (chain C) in PDB entry 5TIN


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 LYS 281 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    142C  LEU*     3.3    39.0    -      -       +      +
    143C  LYS      3.2     7.2    -      -       -      -
    145C  PHE*     4.2     9.9    -      -       +      +
    271C  ARG*     3.9    22.8    -      -       -      +
    274C  LEU*     3.8    30.5    -      -       +      -
    275C  PRO      5.4     0.6    +      -       -      -
    277C  VAL*     3.6    26.8    +      -       +      +
    279C  TYR*     3.7    13.8    +      -       +      +
    280C  VAL*     1.3    81.6    -      -       -      +
    282C  ALA*     1.3    65.4    +      -       -      +
    283C  ILE*     3.3     6.7    -      -       +      +
    284C  ASP*     3.0    41.6    +      -       -      +
    285C  ILE*     3.2    11.8    +      -       -      +
    345C  TYR*     5.0     0.7    -      -       -      -
    222D  TYR*     6.1     0.2    -      -       -      -
    225D  ILE*     5.2     2.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 282 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    143C  LYS      2.9     7.9    +      -       -      +
    144C  ASN      3.7    12.8    -      -       -      +
    145C  PHE      3.3    12.2    +      -       -      +
    147C  MET*     4.0     5.2    -      -       +      -
    281C  LYS*     1.3    72.4    -      -       -      +
    283C  ILE*     1.3    62.2    +      -       -      +
    285C  ILE*     3.3     3.1    +      -       -      +
    286C  TRP      3.2    13.5    +      -       -      -
    341C  TYR*     2.8    25.9    +      -       -      +
    345C  TYR*     3.5    42.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 283 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    145C  PHE*     3.0    34.8    +      -       +      +
    146C  PRO*     4.1     6.9    -      -       +      +
    227C  MET*     4.0    25.6    -      -       +      -
    228C  TYR*     3.6    37.2    -      -       +      +
    270C  SER*     3.9    30.1    -      -       -      +
    271C  ARG*     5.4     0.2    -      -       +      -
    281C  LYS*     4.3    10.8    -      -       +      -
    282C  ALA*     1.3    76.3    -      -       -      +
    284C  ASP*     1.3    70.5    +      -       -      +
    286C  TRP*     3.5     2.6    +      -       +      +
    287C  MET*     3.0    37.6    +      -       +      +
    341C  TYR*     3.9     2.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 284 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    270C  SER*     4.5     0.9    +      -       -      -
    271C  ARG*     3.0    39.2    +      -       -      +
    279C  TYR      4.0     0.5    -      -       -      +
    280C  VAL*     3.9    12.6    -      -       +      -
    281C  LYS*     3.0    52.5    +      -       -      +
    283C  ILE*     1.3    80.0    -      -       -      +
    285C  ILE*     1.3    59.8    +      -       -      +
    287C  MET*     3.3     5.6    +      -       -      +
    288C  ALA*     2.9    32.5    +      -       -      +
    225D  ILE*     4.4    13.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 285 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    280C  VAL*     3.5    21.5    -      -       +      -
    281C  LYS      3.2    12.9    +      -       -      +
    282C  ALA      3.3     7.4    +      -       -      +
    284C  ASP*     1.3    76.5    -      -       -      +
    286C  TRP*     1.3    58.8    +      -       -      +
    288C  ALA*     3.6     4.8    -      -       +      +
    289C  VAL*     3.0    40.6    +      -       +      +
    337C  PHE*     4.7     4.5    -      -       +      -
    341C  TYR*     4.3    17.5    -      -       +      -
    345C  TYR*     4.0    16.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with TRP 286 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    228C  TYR*     3.4    42.7    -      +       +      -
    231C  SER*     2.8    24.2    +      -       -      -
    232C  LEU*     4.8     9.4    -      -       +      -
    282C  ALA      3.2     2.6    +      -       -      -
    283C  ILE*     3.6     8.3    -      -       +      +
    285C  ILE*     1.3    80.1    -      -       -      +
    287C  MET*     1.3    74.1    +      -       +      +
    289C  VAL*     3.4     2.1    +      -       -      +
    290C  CYS*     2.9    46.6    +      -       -      +
    334C  PHE*     4.3     8.7    -      +       -      -
    337C  PHE*     3.7    25.1    -      +       -      -
    338C  ASN*     3.6    37.9    -      -       -      -
    341C  TYR*     3.7    38.8    -      +       +      +
    342C  TRP*     4.1    14.4    -      +       -      -
----------------------------------------------------------
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Residues in contact with MET 287 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    227C  MET*     3.7    45.1    -      -       +      +
    231C  SER*     4.1     0.7    -      -       -      -
    263C  MET*     3.4    26.6    -      -       -      +
    266C  GLN*     4.0    24.2    -      -       +      +
    267C  SER*     4.0    30.7    -      -       -      +
    270C  SER*     4.0    10.1    -      -       -      +
    271C  ARG*     5.8     0.2    -      -       -      +
    283C  ILE*     3.0    26.3    +      -       +      +
    284C  ASP*     3.9     5.4    -      -       -      +
    286C  TRP*     1.3    90.4    -      -       +      +
    288C  ALA*     1.3    57.3    +      -       -      +
    290C  CYS*     3.5     3.1    +      -       -      +
    291C  LEU*     2.9    30.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 288 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    284C  ASP      2.9    18.8    +      -       -      +
    285C  ILE*     3.6     6.5    -      -       +      +
    287C  MET*     1.3    77.6    -      -       -      +
    289C  VAL*     1.3    58.7    +      -       +      +
    291C  LEU*     3.2    11.0    +      -       -      +
    292C  LEU*     2.9    30.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 289 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    285C  ILE*     3.0    26.4    +      -       +      +
    286C  TRP      3.9     0.2    -      -       -      +
    288C  ALA*     1.3    73.3    -      -       +      +
    290C  CYS*     1.3    66.8    +      -       -      +
    292C  LEU*     3.1    14.8    +      -       +      +
    293C  PHE*     2.9    43.0    +      -       +      -
    334C  PHE*     5.1     0.7    -      -       +      -
    337C  PHE*     3.5    53.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with CYS 290 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    231C  SER*     4.3     7.4    -      -       -      -
    235C  VAL*     3.8    24.6    -      -       +      +
    263C  MET*     3.7    22.0    -      -       +      -
    286C  TRP*     2.9    54.2    +      -       -      +
    287C  MET      3.7     0.7    -      -       -      +
    289C  VAL*     1.3    78.5    -      -       -      +
    291C  LEU*     1.3    61.7    +      -       -      +
    293C  PHE*     3.4     5.1    +      -       -      +
    294C  VAL*     3.1    27.5    +      -       -      +
    334C  PHE*     4.1    11.2    -      -       -      -
    337C  PHE*     5.5     0.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 291 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    260C  VAL*     3.8    25.4    -      -       +      +
    263C  MET*     3.7    30.7    -      -       +      +
    264C  THR*     4.1    18.6    -      -       +      -
    267C  SER*     5.6     5.8    -      -       -      -
    287C  MET      2.9    18.8    +      -       -      +
    288C  ALA*     3.4     9.6    -      -       -      +
    290C  CYS*     1.3    76.5    -      -       -      +
    292C  LEU*     1.3    57.1    +      -       -      +
    294C  VAL*     3.4     1.5    +      -       -      -
    295C  PHE*     2.9    35.2    +      -       +      +
    230D  PRO*     6.1     0.7    -      -       +      -
    233D  LEU*     3.3    33.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 292 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    288C  ALA      2.9    15.4    +      -       -      +
    289C  VAL*     3.1    19.7    +      -       +      +
    291C  LEU*     1.3    76.9    -      -       -      +
    293C  PHE*     1.3    55.9    +      -       +      +
    295C  PHE*     3.3     6.9    +      -       +      +
    296C  SER*     2.8    48.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 293 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    235C  VAL*     4.5    12.8    -      -       +      -
    238C  SER*     4.6     1.8    +      -       -      -
    239C  TRP*     4.8     5.2    -      -       -      +
    289C  VAL*     2.9    46.0    +      -       +      +
    290C  CYS*     3.7     7.0    -      -       -      +
    291C  LEU      3.4     0.2    -      -       -      -
    292C  LEU*     1.3    78.2    -      -       +      +
    294C  VAL*     1.3    57.8    +      -       -      +
    296C  SER*     3.5     4.8    +      -       -      -
    297C  ALA*     3.1    23.6    +      -       -      +
    330C  PHE*     3.5    40.7    -      +       +      -
    333C  ALA*     3.7    18.4    -      -       +      -
    334C  PHE*     3.5    54.3    -      +       +      -
    337C  PHE*     4.7     5.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 294 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    234C  ILE*     3.9    19.5    -      -       +      +
    235C  VAL*     3.9    13.0    -      -       +      -
    238C  SER*     3.7    27.5    -      -       -      +
    256C  GLY*     4.8     1.0    -      -       -      +
    259C  THR*     3.3    16.5    +      -       -      +
    260C  VAL*     3.2    44.0    -      -       +      +
    263C  MET*     4.6     5.2    -      -       +      -
    290C  CYS      3.1    17.2    +      -       -      +
    291C  LEU*     3.9     4.3    -      -       -      +
    293C  PHE*     1.3    76.4    -      -       -      +
    295C  PHE*     1.3    64.3    +      -       -      +
    297C  ALA*     3.5     4.6    +      -       -      +
    298C  LEU*     3.5    15.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 295 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    260C  VAL*     3.8    32.5    -      -       +      -
    291C  LEU*     2.9    22.7    +      -       +      +
    292C  LEU*     3.7     9.2    -      -       +      +
    294C  VAL*     1.3    74.3    -      -       -      +
    296C  SER*     1.3    61.5    +      -       -      +
    298C  LEU*     3.2    13.8    +      -       +      +
    299C  LEU*     3.0    55.3    +      -       +      +
    233D  LEU*     3.8    40.8    -      -       +      -
    236D  ILE*     4.3    24.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 296 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    292C  LEU*     2.8    34.2    +      -       -      +
    293C  PHE*     3.6     8.3    -      -       -      -
    295C  PHE*     1.3    77.8    -      -       -      +
    297C  ALA*     1.3    51.5    +      -       -      +
    299C  LEU*     3.3    13.6    +      -       -      +
    300C  GLU*     2.8    34.0    +      -       -      +
    330C  PHE*     3.7    17.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 297 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    238C  SER*     4.0    26.5    -      -       -      +
    241C  SER*     5.2     4.9    +      -       -      -
    242C  PHE*     3.8    22.4    -      -       +      -
    256C  GLY*     6.3     1.1    -      -       -      -
    293C  PHE      3.1    13.4    +      -       -      +
    294C  VAL      3.7     9.6    -      -       -      +
    295C  PHE      3.2     0.4    -      -       -      -
    296C  SER*     1.3    74.2    -      -       -      +
    298C  LEU*     1.3    64.8    +      -       -      +
    300C  GLU*     3.3     8.9    -      -       -      +
    301C  TYR*     3.2    18.9    +      -       -      +
    330C  PHE*     3.6    10.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 298 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    252C  ARG      4.7     2.7    -      -       -      +
    253C  VAL*     4.4    29.2    -      -       +      +
    256C  GLY*     4.0    39.4    -      -       -      +
    257C  ILE*     4.4     9.2    -      -       +      +
    260C  VAL*     4.6     8.1    -      -       +      -
    294C  VAL      3.5     7.0    +      -       -      +
    295C  PHE*     3.2    20.5    +      -       +      +
    297C  ALA*     1.3    76.2    -      -       -      +
    299C  LEU*     1.3    68.2    +      -       +      +
    301C  TYR*     3.0     9.6    +      -       +      -
    302C  ALA*     3.0    21.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 299 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    295C  PHE*     3.0    44.7    +      -       +      +
    296C  SER*     3.3    15.5    +      -       -      +
    298C  LEU*     1.3    74.8    -      -       +      +
    300C  GLU*     1.3    66.3    +      -       -      +
    302C  ALA*     3.2    13.4    +      -       +      +
    303C  ALA*     3.0    22.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 300 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    242C  PHE*     3.6    17.8    -      -       +      -
    252C  ARG*     3.9     5.0    +      -       -      -
    296C  SER      2.8    18.0    +      -       -      +
    297C  ALA*     3.3    13.3    -      -       -      +
    298C  LEU      3.2     0.4    -      -       -      -
    299C  LEU*     1.3    73.2    -      -       -      +
    301C  TYR*     1.3    62.7    +      -       -      +
    303C  ALA*     3.2     8.7    +      -       -      +
    304C  VAL*     3.0    25.5    +      -       -      +
    322C  ILE*     3.5    20.4    -      -       +      +
    323C  ASP*     2.8    27.2    -      -       -      +
    326C  SER*     3.0    31.9    +      -       -      +
    330C  PHE*     4.4     7.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 301 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    241C  SER*     4.9     1.3    -      -       -      +
    246C  MET*     2.9    26.3    +      -       -      -
    249C  ALA*     3.1    28.2    -      -       +      +
    252C  ARG*     3.0    55.2    -      -       +      +
    253C  VAL*     3.9    31.2    -      -       +      -
    297C  ALA      3.2     6.5    +      -       -      +
    298C  LEU*     3.0    13.6    +      -       +      +
    300C  GLU*     1.3    81.3    +      -       -      +
    302C  ALA*     1.3    62.3    +      -       -      +
    304C  VAL*     3.1    18.1    +      -       +      -
    305C  ASN*     2.8    58.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 302 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    298C  LEU*     3.0    13.9    +      -       +      +
    299C  LEU*     3.4    20.2    -      -       +      +
    301C  TYR*     1.3    77.4    -      -       -      +
    303C  ALA*     1.3    58.1    +      -       -      +
    305C  ASN*     3.8     5.5    -      -       -      +
    306C  PHE*     2.9    31.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 303 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    299C  LEU      3.0    12.1    +      -       -      +
    300C  GLU*     3.4    11.9    -      -       -      +
    301C  TYR      3.1     0.2    -      -       -      -
    302C  ALA*     1.3    74.4    -      -       -      +
    304C  VAL*     1.3    59.0    +      -       -      +
    306C  PHE*     4.4     4.3    -      -       -      -
    307C  VAL*     2.8    41.2    +      -       +      +
    322C  ILE*     4.6    15.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 304 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    246C  MET*     3.8    30.5    -      -       +      -
    300C  GLU*     3.0    20.7    +      -       -      +
    301C  TYR*     3.1    19.3    +      -       +      +
    303C  ALA*     1.3    76.4    -      -       -      +
    305C  ASN*     1.3    53.4    +      -       -      +
    307C  VAL*     4.3     5.8    -      -       -      -
    308C  SER*     2.7    35.5    +      -       -      -
    319C  ALA*     3.7    20.5    -      -       +      +
    322C  ILE*     3.7    24.7    -      -       +      -
    323C  ASP*     3.7    24.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 305 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    246C  MET      4.8     2.7    +      -       -      -
    249C  ALA*     4.1    10.7    -      -       -      +
    301C  TYR*     2.8    55.3    +      -       +      +
    302C  ALA*     3.8     5.4    -      -       -      +
    304C  VAL*     1.3    75.1    -      -       -      +
    306C  PHE*     1.3    62.8    +      -       -      +
    308C  SER*     3.5    12.2    +      -       -      -
    309C  ARG*     3.6    16.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 306 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    302C  ALA      2.9    20.4    +      -       -      +
    303C  ALA*     3.2     5.1    +      -       -      +
    305C  ASN*     1.3    75.0    +      -       -      +
    307C  VAL*     1.3    73.0    +      -       +      +
    308C  SER      3.2     2.3    +      -       -      -
    309C  ARG*     3.0    75.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 307 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    303C  ALA*     2.8    31.3    +      -       +      +
    306C  PHE*     1.3    82.2    -      -       +      +
    308C  SER*     1.3    60.2    +      -       -      +
    309C  ARG*     3.4     1.8    +      -       -      +
    310C  ALA      5.0     0.9    +      -       -      +
    315C  PHE*     3.4    35.6    -      -       +      +
    318C  ARG*     4.5     5.8    -      -       +      -
    319C  ALA*     3.6    36.1    -      -       +      +
    322C  ILE*     4.2    15.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 308 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    246C  MET*     4.3    10.5    +      -       -      +
    304C  VAL*     2.7    22.1    +      -       -      +
    305C  ASN*     3.5     9.2    +      -       -      -
    306C  PHE      3.2     0.4    -      -       -      -
    307C  VAL*     1.3    78.5    -      -       -      +
    309C  ARG*     1.3    64.3    +      -       -      +
    310C  ALA      3.4    13.2    +      -       -      +
    311C  GLY*     4.2     1.6    +      -       -      -
    315C  PHE      4.2     5.8    -      -       -      -
    316C  ILE*     4.1    23.4    -      -       -      +
    319C  ALA*     3.8    16.8    -      -       -      -
----------------------------------------------------------
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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