Contacts of the helix formed by residues 277 - 301 (chain N) in PDB entry 4BOG


Residue contacts within the protein are derived with the CSU software (Sobolev V., Sorokine A., Prilusky J., Abola E.E. and Edelman M. (1999) Automated analysis of interatomic contacts in proteins. Bioinformatics, 15, 327-332). A short description of the analytical approach is given at the end of the page.
For CSU analysis of other PDB entry

Note:
Non-standard 3 letter residue codes indicate a heterogroup. To identify and analyse, use LPC software

Legend:
Dist - nearest distance (Å) between atoms of two residues
Surf - contact surface area (Å2) between two residues
HB   - hydrophilic-hydrophilic contact (hydrogen bond)
Arom - aromatic-aromatic contact
Phob - hydrophobic-hydrophobic contact
DC   - hydrophobic-hydrophilic contact (destabilizing contact)
+/-  - indicates presence/absence of a specific contacts
*    - indicates residues forming contacts  by their side chain
       (including CA atoms)
Residues in contact with TYR 277 (chain N).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    135N  PHE*     3.8    23.6    -      +       -      -
    136N  PRO*     3.3    27.7    -      -       +      +
    137N  PHE*     3.3    38.4    -      +       -      -
    138N  ASP*     4.7     0.9    +      -       -      -
    210N  ILE*     4.1     1.1    -      -       +      +
    273N  LEU*     4.5    11.7    -      -       +      -
    274N  ILE*     2.9    48.8    +      -       +      +
    275N  GLY      2.4     6.9    +      -       -      -
    276N  LYS*     1.3    70.2    -      -       -      +
    278N  MET*     1.3    53.3    +      -       -      +
    279N  LEU      2.9     4.9    -      -       -      -
    280N  PHE*     2.7    63.8    +      +       -      +
    281N  THR*     4.0     0.5    +      -       -      -
    431N  ILE*     4.8    10.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with MET 278 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    231M  ASN*     4.9     4.9    -      -       -      +
    261N  VAL*     5.0    10.3    -      -       +      -
    264N  ILE*     3.6    39.3    -      -       +      -
    268N  SER*     6.2     0.9    -      -       -      +
    273N  LEU*     5.5     9.0    -      -       +      +
    275N  GLY*     2.9    14.3    +      -       -      +
    277N  TYR*     1.3    75.3    -      -       -      +
    279N  LEU*     1.3    51.2    +      -       +      +
    281N  THR*     2.6    50.7    +      -       -      -
    282N  MET*     2.8    64.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 279 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    275N  GLY      3.7     9.6    -      -       -      +
    276N  LYS*     3.2    36.1    -      -       +      +
    278N  MET*     1.3    77.8    -      -       +      +
    280N  PHE*     1.3    68.4    +      -       +      +
    282N  MET*     3.2    24.8    -      -       +      +
    283N  ILE*     3.5    14.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 280 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    276N  LYS*     2.6    27.6    -      -       +      -
    277N  TYR*     2.7    49.2    +      +       -      +
    279N  LEU*     1.3    76.9    -      -       +      +
    281N  THR*     1.3    58.7    +      -       -      +
    284N  PHE*     2.6    64.0    +      +       +      -
    424N  SER      5.8     1.3    -      -       -      -
    427N  ALA*     5.6     7.6    -      -       +      -
    428N  GLY*     5.4    12.6    -      -       -      -
    431N  ILE*     4.0    24.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 281 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    218N  VAL*     4.0    27.8    -      -       +      -
    222N  CYS*     6.2     3.4    -      -       -      -
    260N  ILE*     6.5     0.4    -      -       +      -
    261N  VAL*     6.3     0.4    -      -       -      -
    264N  ILE*     5.5     6.5    -      -       +      -
    277N  TYR      4.3     0.5    +      -       -      -
    278N  MET*     2.6    46.1    +      -       -      -
    280N  PHE*     1.3    75.4    -      -       -      +
    282N  MET*     1.3    68.5    +      -       -      +
    284N  PHE*     4.0    10.5    -      -       +      -
    285N  VAL*     2.7    31.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with MET 282 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    231M  ASN*     3.9    26.5    -      -       -      +
    234M  THR*     5.3    11.0    -      -       +      -
    261N  VAL*     5.5     6.7    -      -       +      -
    278N  MET*     2.8    35.4    +      -       +      +
    279N  LEU*     3.2    23.6    -      -       +      +
    280N  PHE      3.2     0.2    -      -       -      -
    281N  THR*     1.3    79.3    -      -       -      +
    283N  ILE*     1.3    54.2    +      -       +      +
    285N  VAL*     3.9     6.6    -      -       +      +
    286N  ILE*     2.7    67.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 283 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    279N  LEU      3.6    14.1    -      -       -      +
    280N  PHE*     3.9     2.9    -      -       -      +
    282N  MET*     1.3    80.0    -      -       +      +
    284N  PHE*     1.3    70.9    +      -       +      +
    286N  ILE*     3.1    17.4    -      -       +      +
    287N  SER*     2.5    37.8    +      -       -      -
    290N  ILE*     4.8     1.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 284 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    222N  CYS*     6.0     8.7    -      -       -      -
    225N  PHE*     5.9     0.8    -      -       +      -
    280N  PHE*     2.6    58.2    +      +       +      +
    281N  THR*     3.8     9.2    -      -       +      +
    283N  ILE*     1.3    87.6    -      -       +      +
    285N  VAL*     1.3    60.2    +      -       +      +
    287N  SER*     2.6    27.4    +      -       -      -
    288N  SER*     3.3     5.0    +      -       -      -
    420N  ILE*     4.6    12.7    -      -       +      +
    423N  VAL*     5.3     5.8    -      -       +      -
    424N  SER*     2.9    51.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 285 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    222N  CYS*     5.3     0.7    -      -       -      -
    225N  PHE*     3.1    42.8    -      -       +      -
    257N  LEU*     4.2    29.1    -      -       +      +
    261N  VAL*     5.6     8.7    -      -       +      -
    281N  THR*     2.7    26.2    +      -       +      +
    282N  MET*     4.0     8.5    -      -       +      +
    284N  PHE*     1.3    72.6    -      -       +      +
    286N  ILE*     1.3    70.1    +      -       +      +
    287N  SER      2.6     5.4    -      -       -      -
    288N  SER*     2.8    18.4    +      -       -      +
    289N  ILE*     3.0    13.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 286 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    234M  THR*     5.7     6.3    -      -       +      -
    238M  LEU*     4.0    30.3    -      -       +      -
    282N  MET*     2.7    75.9    +      -       +      +
    283N  ILE*     3.1    19.1    -      -       +      +
    285N  VAL*     1.3    75.3    -      -       +      +
    287N  SER*     1.3    52.7    +      -       -      +
    289N  ILE*     3.0     7.5    +      -       +      -
    290N  ILE*     2.4    56.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 287 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    283N  ILE      2.5    12.3    +      -       -      -
    284N  PHE*     2.6    18.2    -      -       -      -
    285N  VAL      2.6     0.8    -      -       -      -
    286N  ILE*     1.3    76.5    -      -       -      +
    288N  SER*     1.3    55.3    +      -       -      -
    290N  ILE*     2.9    23.3    -      -       -      +
    291N  VAL*     2.7    47.7    +      -       -      +
    417N  ILE*     5.7     0.3    -      -       -      +
    420N  ILE*     3.1    29.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 288 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    225N  PHE*     5.2    10.2    -      -       -      -
    229N  THR*     3.1    31.2    -      -       -      +
    253N  LEU*     4.8     7.9    -      -       -      +
    257N  LEU*     5.4     7.3    -      -       -      +
    284N  PHE      3.3     3.9    +      -       -      -
    285N  VAL*     2.8    22.8    +      -       -      -
    287N  SER*     1.3    74.7    -      -       -      +
    289N  ILE*     1.3    57.6    +      -       -      +
    291N  VAL*     3.9     5.1    -      -       -      +
    292N  THR*     2.7    31.1    +      -       -      -
    417N  ILE*     6.0     5.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 289 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    238M  LEU*     3.6    36.3    -      -       +      -
    241M  PHE*     4.6     4.3    -      -       +      -
    253N  LEU*     5.7     4.3    -      -       +      -
    254N  THR*     4.7     8.3    -      -       -      +
    257N  LEU*     4.8    17.3    -      -       +      -
    258N  LEU*     4.6    20.2    -      -       +      -
    285N  VAL*     3.0    11.3    +      -       +      +
    286N  ILE*     3.4    13.5    -      -       +      +
    287N  SER      3.0     0.4    -      -       -      -
    288N  SER*     1.3    75.8    -      -       -      +
    290N  ILE*     1.3    58.1    +      -       +      +
    291N  VAL      3.0     0.3    +      -       -      -
    292N  THR*     3.0    10.8    +      -       +      +
    293N  VAL*     2.5    51.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 290 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    283N  ILE      4.8     1.3    -      -       -      +
    286N  ILE*     2.4    51.8    +      -       +      +
    287N  SER*     2.7    52.0    -      -       -      +
    289N  ILE*     1.3    66.6    -      -       +      +
    291N  VAL*     1.3    66.4    +      -       +      +
    293N  VAL*     2.8    29.9    -      -       -      +
    294N  VAL*     3.0    13.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 291 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    233N  PHE*     3.7     8.3    -      -       +      -
    287N  SER*     2.7    41.8    +      -       -      +
    288N  SER*     3.9     4.3    -      -       -      +
    290N  ILE*     1.3    79.6    -      -       +      +
    292N  THR*     1.3    57.0    +      -       -      +
    293N  VAL      2.9     1.2    +      -       -      -
    294N  VAL*     3.0     3.6    +      -       -      -
    295N  VAL*     2.4    67.6    +      -       +      +
    413N  VAL*     3.4    34.8    -      -       +      -
    417N  ILE*     5.1     5.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 292 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    241M  PHE*     6.1     0.9    -      -       +      -
    229N  THR*     6.5     0.9    -      -       -      -
    232N  VAL*     4.9     2.7    -      -       -      +
    250N  LEU*     2.5    39.5    -      -       +      +
    253N  LEU*     5.2     2.5    -      -       +      -
    288N  SER*     2.7    20.7    +      -       -      +
    289N  ILE*     3.2    20.9    -      -       +      +
    291N  VAL*     1.3    72.6    -      -       -      +
    293N  VAL*     1.3    69.2    -      -       +      +
    295N  VAL*     3.0    13.2    -      -       -      +
    296N  ILE*     2.7    52.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 293 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    241M  PHE*     2.9    46.9    -      -       +      -
    245M  LEU*     4.8     2.9    -      -       +      -
    289N  ILE*     2.5    38.9    +      -       +      +
    290N  ILE*     2.8    15.9    -      -       -      +
    292N  THR*     1.3    78.4    -      -       +      +
    294N  VAL*     1.3    60.8    +      -       +      +
    297N  ASN*     2.4    54.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 294 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    290N  ILE      3.0     9.7    +      -       -      +
    291N  VAL*     3.8     5.8    -      -       -      +
    293N  VAL*     1.3    86.2    -      -       +      +
    295N  VAL*     1.3    59.5    +      -       +      +
    297N  ASN*     4.1     3.4    -      -       -      -
    298N  THR*     2.3    60.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 295 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    232N  VAL*     4.0    23.6    -      -       +      -
    233N  PHE*     3.9    12.3    -      -       +      -
    291N  VAL*     2.4    65.9    +      -       +      +
    292N  THR*     3.0    17.0    -      -       -      +
    294N  VAL*     1.3    73.0    -      -       +      +
    296N  ILE*     1.3    62.5    +      -       +      +
    298N  THR*     3.1     6.4    -      -       -      -
    299N  HIS*     2.2    35.5    +      -       -      +
    409N  ILE*     4.4    20.9    -      -       +      +
    413N  VAL*     4.2     8.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 296 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    232N  VAL*     4.4     9.2    -      -       +      -
    246N  SER*     3.5    17.0    -      -       -      +
    247N  ILE*     4.4    14.6    -      -       +      -
    250N  LEU*     3.0    30.3    -      -       +      -
    292N  THR*     2.7    49.4    +      -       +      +
    293N  VAL      4.7     0.2    -      -       -      +
    295N  VAL*     1.3    77.4    -      -       -      +
    297N  ASN*     1.3    61.6    +      -       -      +
    299N  HIS*     2.9    30.4    -      -       +      +
    300N  HIS*     2.4    50.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 297 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    241M  PHE*     5.1     0.6    -      -       -      -
    245M  LEU*     3.0    45.6    -      -       -      +
    249M  LEU*     4.3    15.8    -      -       -      +
    252M  GLU*     5.1     1.7    -      -       -      +
    292N  THR      4.3     0.8    +      -       -      -
    293N  VAL*     2.4    41.0    +      -       -      +
    294N  VAL*     3.4     4.3    -      -       -      +
    296N  ILE*     1.3    78.5    -      -       -      +
    298N  THR*     1.3    51.8    +      -       -      +
    300N  HIS*     3.1     6.5    +      -       -      +
    301N  ARG*     2.7    31.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 298 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    294N  VAL*     2.3    59.8    +      -       +      +
    295N  VAL*     3.4     7.4    -      -       -      +
    297N  ASN*     1.3    67.8    -      -       -      +
    299N  HIS*     1.3    61.6    +      -       -      -
    301N  ARG*     2.6    74.5    +      -       +      +
    405N  VAL*     5.7     2.0    -      -       +      -
    409N  ILE*     5.0    13.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with HIS 299 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    232N  VAL*     3.6     9.9    +      -       -      +
    235N  LEU*     5.4     0.2    -      -       +      -
    236N  PRO*     2.8    56.2    -      -       +      +
    240N  GLY*     5.0     0.4    -      -       -      -
    243N  MET*     4.4    19.3    -      -       +      +
    246N  SER*     3.9    18.1    +      -       -      -
    295N  VAL      2.2    30.0    +      -       -      +
    296N  ILE*     2.7    34.5    +      -       +      +
    298N  THR*     1.3    72.6    -      -       -      +
    300N  HIS*     1.3    54.7    +      +       -      +
    301N  ARG*     4.2    10.5    +      -       -      +
    302N  SER*     5.6     0.2    +      -       -      -
    306N  HIS      2.3    22.8    -      -       -      +
    406N  ILE*     4.5     7.4    -      -       +      +
    409N  ILE*     6.5     1.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with HIS 300 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    249M  LEU*     6.0     7.6    -      -       +      -
    252M  GLU*     3.1    17.9    -      -       +      +
    253M  SER*     4.8     3.1    -      -       -      -
    256M  LYS*     3.9    33.3    -      -       +      +
    243N  MET*     3.6    38.5    +      -       +      +
    244N  THR*     4.6     1.3    -      -       -      -
    247N  ILE*     3.9    22.6    -      -       +      +
    296N  ILE*     2.4    49.9    +      -       +      +
    297N  ASN*     3.5     4.9    -      -       -      +
    299N  HIS*     1.3    68.7    -      +       +      -
    301N  ARG*     1.3    48.9    +      -       -      +
    302N  SER      2.6    18.6    +      -       -      +
    306N  HIS*     2.6    44.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 301 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    252M  GLU*     2.9    25.1    -      -       -      +
    297N  ASN      2.7     9.0    +      -       -      +
    298N  THR*     2.6    65.3    +      -       +      +
    299N  HIS*     4.2     6.0    +      -       -      +
    300N  HIS*     1.3    69.5    -      -       -      +
    302N  SER*     1.3    67.9    +      -       -      +
    303N  PRO*     4.0     3.5    -      -       -      +
    400N  LYS      5.5     4.4    +      -       -      -
    401N  TYR*     6.4     0.2    -      -       -      +
    402N  VAL*     5.9     3.4    -      -       -      +
    405N  VAL*     3.2    45.1    -      -       -      +
    406N  ILE*     3.9    22.6    -      -       -      +
    409N  ILE*     5.3     1.8    -      -       -      +
----------------------------------------------------------
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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