Contacts of the helix formed by residues 260 - 284 (chain C) in PDB entry 2GPV


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

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

Legend:
Dist - nearest distance (Å) between atoms of two residues
Surf - contact surface area (Å2) between two residues
HB   - hydrophilic-hydrophilic contact (hydrogen bond)
Arom - aromatic-aromatic contact
Phob - hydrophobic-hydrophobic contact
DC   - hydrophobic-hydrophilic contact (destabilizing contact)
+/-  - indicates presence/absence of a specific contacts
*    - indicates residues forming contacts  by their side chain
       (including CA atoms)
Residues in contact with SER 260 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    258C  PRO*     2.9    17.0    +      -       -      +
    259C  ASP*     1.3    75.4    -      -       -      +
    261C  ASP*     1.3    73.6    +      -       -      +
    262C  ILE      4.2     2.7    -      -       -      -
    263C  LYS*     3.2    16.7    +      -       -      +
    264C  ALA*     3.3    13.2    +      -       -      +
    339C  LEU*     4.5    11.4    -      -       -      +
    447C  HIS*     3.5    24.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 261 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    260C  SER*     1.3    77.2    -      -       -      +
    262C  ILE*     1.3    89.4    +      -       -      +
    264C  ALA*     3.4     3.1    +      -       -      +
    265C  LEU*     3.1    32.0    +      -       +      +
    339C  LEU      3.3    26.1    +      -       -      +
    340C  ALA*     3.9    17.2    -      -       -      +
    443C  LYS*     5.5     2.6    -      -       -      +
    447C  HIS*     5.7     0.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 262 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    260C  SER*     3.3     1.0    -      -       -      -
    261C  ASP*     1.3    98.2    +      -       -      +
    263C  LYS*     1.3    51.8    +      -       -      +
    265C  LEU*     3.7     9.5    -      -       +      +
    266C  THR*     2.5    53.4    +      -       -      +
    443C  LYS*     3.6    25.6    -      -       +      +
    444C  VAL*     3.8    32.1    -      -       +      +
    447C  HIS*     3.4    53.8    -      -       +      +
    448C  LYS*     6.0     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 263 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    253C  PRO*     4.6    11.7    -      -       +      +
    254C  ASP*     3.0    33.0    +      -       -      +
    255C  PRO*     4.1     7.3    +      -       -      +
    257C  VAL*     2.7    43.6    +      -       +      +
    258C  PRO      3.9     8.1    -      -       -      +
    259C  ASP*     3.8    23.8    +      -       -      +
    260C  SER*     3.2    22.6    +      -       -      +
    262C  ILE*     1.3    74.1    -      -       -      +
    264C  ALA*     1.3    70.1    +      -       -      +
    265C  LEU      2.8     1.2    +      -       -      -
    266C  THR*     2.8     7.1    +      -       -      -
    267C  THR*     2.6    34.6    +      -       -      +
    330C  TYR*     5.4     3.8    -      -       +      +
    447C  HIS*     4.6     2.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 264 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    260C  SER      3.3     7.7    +      -       -      +
    261C  ASP      3.6     3.8    -      -       -      +
    263C  LYS*     1.3    77.5    -      -       -      +
    265C  LEU*     1.3    57.0    +      -       +      +
    267C  THR*     3.4     2.1    +      -       -      -
    268C  LEU*     2.9    39.4    +      -       +      +
    330C  TYR*     2.9    26.0    -      -       -      +
    332C  MET*     4.5     7.0    -      -       +      -
    336C  GLN      5.4     0.2    -      -       -      +
    340C  ALA*     3.5    31.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 265 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    261C  ASP*     3.1    28.7    +      -       +      +
    262C  ILE*     3.7    13.9    -      -       +      +
    263C  LYS      2.8     3.4    +      -       -      -
    264C  ALA*     1.3    72.0    -      -       +      +
    266C  THR*     1.3    66.8    +      -       -      +
    267C  THR      3.1     0.2    +      -       -      -
    268C  LEU*     3.2     4.6    +      -       -      +
    269C  CYS*     2.8    29.0    +      -       -      +
    340C  ALA      3.7    16.6    -      -       -      +
    342C  LEU*     3.9    21.1    -      -       +      -
    434C  HIS*     5.4     3.1    -      -       -      +
    438C  ILE*     5.2    20.9    -      -       +      -
    444C  VAL*     5.2     9.2    -      -       +      -
    502C  OHT      3.8    29.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 266 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    262C  ILE*     2.5    43.3    +      -       -      +
    263C  LYS*     2.8     6.0    +      -       -      -
    265C  LEU*     1.3    72.6    -      -       -      +
    267C  THR*     1.3    63.0    +      -       -      +
    269C  CYS*     3.3     8.3    -      -       +      +
    270C  ASP*     3.2    22.7    +      -       +      +
    444C  VAL*     4.2    10.9    -      -       +      +
    447C  HIS*     5.3     1.2    -      -       -      -
    448C  LYS*     5.0    14.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 267 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    251C  ALA*     4.1    35.3    -      -       +      +
    253C  PRO*     4.1    18.1    -      -       +      +
    254C  ASP      5.0     1.2    +      -       -      -
    263C  LYS*     2.6    31.9    +      -       -      +
    264C  ALA*     3.6     6.1    -      -       -      -
    266C  THR*     1.3    72.3    -      -       -      +
    268C  LEU*     1.3    68.7    +      -       +      +
    269C  CYS      3.2     0.2    +      -       -      -
    270C  ASP*     3.3     6.4    +      -       -      +
    271C  LEU*     3.0    21.0    +      -       +      +
    330C  TYR*     4.1    23.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 268 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    264C  ALA      2.9    24.9    +      -       -      +
    265C  LEU*     3.9     3.1    -      -       -      +
    267C  THR*     1.3    74.6    -      -       -      +
    269C  CYS*     1.3    58.2    +      -       -      +
    271C  LEU*     3.2     9.5    +      -       +      +
    272C  ALA*     2.9    31.5    +      -       -      +
    326C  TYR*     3.5    44.4    -      -       +      -
    330C  TYR*     4.0    11.9    -      -       +      -
    332C  MET*     4.2    15.7    -      -       -      -
    342C  LEU*     3.8    28.5    -      -       +      -
    502C  OHT      3.7    38.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with CYS 269 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    265C  LEU      2.8    15.3    +      -       -      +
    266C  THR*     3.3    14.1    -      -       -      +
    268C  LEU*     1.3    77.6    -      -       -      +
    270C  ASP*     1.3    64.7    +      -       -      +
    272C  ALA*     3.1     1.7    +      -       -      +
    273C  ASP*     2.9    32.0    +      -       -      +
    435C  PHE*     3.8    21.8    -      -       -      -
    439C  LYS*     5.4     3.6    -      -       -      -
    502C  OHT      3.7    26.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 270 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    251C  ALA      5.9     0.9    -      -       -      +
    266C  THR*     3.2    10.8    +      -       +      +
    267C  THR*     3.8     8.1    -      -       -      +
    269C  CYS*     1.3    78.5    -      -       -      +
    271C  LEU*     1.3    61.9    +      -       -      +
    273C  ASP*     3.5     8.5    +      -       -      +
    274C  ARG*     2.9    61.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 271 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    249C  ILE*     4.1    19.1    -      -       +      +
    250C  TYR      3.8    24.5    -      -       -      +
    251C  ALA*     4.2    18.8    -      -       +      -
    267C  THR*     3.0    14.1    +      -       +      +
    268C  LEU*     3.4    15.5    -      -       +      +
    270C  ASP*     1.3    75.1    +      -       -      +
    272C  ALA*     1.3    59.8    +      -       -      +
    274C  ARG*     3.3    12.9    +      -       -      +
    275C  GLU*     2.9    44.7    +      -       +      +
    326C  TYR*     3.7    36.6    -      -       +      +
    327C  ALA*     4.4     1.1    -      -       +      -
    502C  OHT      4.3     7.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 272 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    268C  LEU      2.9    12.8    +      -       -      +
    269C  CYS      3.4     7.9    -      -       -      +
    271C  LEU*     1.3    76.2    -      -       -      +
    273C  ASP*     1.3    63.8    +      -       -      +
    275C  GLU*     2.9    10.3    +      -       -      +
    276C  LEU*     2.8    28.7    +      -       +      +
    309C  LEU*     3.8    11.3    -      -       +      +
    502C  OHT      3.5    46.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 273 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    269C  CYS*     2.9    20.8    +      -       -      +
    270C  ASP*     3.7     8.6    -      -       -      +
    272C  ALA*     1.3    76.1    -      -       -      +
    274C  ARG*     1.3    60.0    +      -       +      +
    276C  LEU*     3.5    20.2    -      -       -      +
    277C  VAL*     3.5    13.5    +      -       -      +
    502C  OHT      2.8    40.8    +      -       -      +
   1323I  ILE*     3.9    16.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 274 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    249C  ILE*     3.6    24.6    -      -       +      +
    250C  TYR      3.1    28.8    +      -       -      +
    251C  ALA      3.4    18.0    +      -       -      -
    252C  MET*     3.3    27.0    -      -       -      +
    270C  ASP*     2.9    34.3    +      -       -      +
    271C  LEU*     3.7    18.5    -      -       -      +
    272C  ALA      3.2     0.8    -      -       -      -
    273C  ASP*     1.3    78.0    -      -       +      +
    275C  GLU*     1.3    64.8    +      -       -      +
    277C  VAL*     3.3    18.7    +      -       +      +
    278C  VAL*     3.5    15.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 275 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    249C  ILE*     3.9    24.2    -      -       +      -
    271C  LEU*     2.9    40.6    +      -       +      +
    272C  ALA      2.9     4.6    +      -       -      +
    274C  ARG*     1.3    72.3    -      -       -      +
    276C  LEU*     1.3    53.4    +      -       -      +
    278C  VAL*     3.2     5.5    -      -       +      +
    279C  ILE*     2.6    44.4    +      -       +      +
    309C  LEU*     3.2    27.9    -      -       +      +
    312C  GLY*     5.7     0.7    -      -       -      -
    316C  ARG*     4.0    19.0    +      -       -      -
    326C  TYR      4.3     0.5    -      -       -      +
    502C  OHT      2.7    28.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 276 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    272C  ALA      2.8    18.8    +      -       -      +
    273C  ASP*     3.5     7.9    -      -       -      +
    275C  GLU*     1.3    76.7    -      -       -      +
    277C  VAL*     1.3    53.6    +      -       -      +
    279C  ILE*     4.0    11.2    -      -       +      +
    280C  ILE*     2.6    47.7    +      -       +      +
    305C  TRP*     3.7    41.1    -      -       +      -
    309C  LEU*     4.6    11.9    -      -       +      -
    502C  OHT      3.7    31.0    -      -       -      -
   1320I  LEU*     4.6     8.3    -      -       +      -
   1323I  ILE*     3.8    26.2    -      -       +      -
   1324I  ILE*     5.7     2.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 277 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    273C  ASP      3.7    13.9    -      -       -      +
    274C  ARG*     3.3    12.6    +      -       +      +
    276C  LEU*     1.3    77.6    -      -       -      +
    278C  VAL*     1.3    64.1    +      -       +      +
    280C  ILE*     3.7    10.5    +      -       -      +
    281C  GLY*     3.3    19.1    +      -       -      -
   1323I  ILE*     4.2    14.4    -      -       +      -
   1327I  ALA*     4.8    10.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 278 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    246C  PRO*     4.2    24.1    -      -       +      +
    249C  ILE*     3.5    30.1    -      -       +      -
    274C  ARG      3.5     6.9    +      -       -      +
    275C  GLU*     3.2    14.6    -      -       +      +
    277C  VAL*     1.3    80.6    -      -       +      +
    279C  ILE*     1.3    68.1    +      -       +      +
    280C  ILE      3.2     1.1    -      -       -      -
    281C  GLY*     3.7     2.5    -      -       -      +
    282C  TRP*     2.9    23.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 279 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    246C  PRO*     5.3     4.3    -      -       +      -
    275C  GLU*     2.6    27.7    +      -       +      +
    276C  LEU*     3.5    13.9    -      -       +      +
    278C  VAL*     1.3    75.1    -      -       +      +
    280C  ILE*     1.3    65.4    +      -       +      +
    282C  TRP*     3.1    19.7    +      -       +      +
    283C  ALA*     3.0    18.9    +      -       -      +
    301C  LEU*     4.6    10.3    -      -       +      -
    305C  TRP*     4.9     3.6    -      -       -      +
    308C  ILE*     3.5    47.6    -      -       +      +
    309C  LEU*     3.7    35.4    -      -       +      +
    370C  LYS*     6.1     2.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 280 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    276C  LEU*     2.6    29.5    +      -       +      +
    277C  VAL*     3.8     4.5    -      -       -      +
    279C  ILE*     1.3    74.8    -      -       +      +
    281C  GLY*     1.3    63.4    +      -       -      +
    283C  ALA*     3.1    21.8    +      -       -      +
    284C  LYS*     3.6    12.0    +      -       -      +
    301C  LEU*     4.2    20.4    -      -       +      -
   1323I  ILE*     3.7    14.8    -      -       +      +
   1324I  ILE*     3.7    36.6    -      -       +      -
   1327I  ALA*     3.4    33.0    -      -       +      +
   1328I  LEU*     4.2    23.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 281 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    277C  VAL      3.3    11.5    +      -       -      -
    278C  VAL*     3.4     5.5    +      -       -      -
    279C  ILE      3.3     0.2    -      -       -      -
    280C  ILE*     1.3    80.7    -      -       -      +
    282C  TRP*     1.3    59.8    +      -       -      +
    284C  LYS*     3.9    24.9    -      -       -      +
    285C  HIS*     3.3    19.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with TRP 282 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    241C  LEU*     4.6    14.8    +      -       +      +
    244C  ALA*     3.3    32.1    -      -       +      +
    245C  GLU*     4.8     2.4    +      -       -      -
    246C  PRO*     3.8    21.8    -      -       +      -
    278C  VAL      2.9    13.2    +      -       -      +
    279C  ILE*     3.3    30.1    -      -       +      +
    280C  ILE      3.1     0.2    -      -       -      -
    281C  GLY*     1.3    77.0    -      -       -      +
    283C  ALA*     1.3    67.0    +      -       +      +
    284C  LYS      3.1     2.2    -      -       -      -
    285C  HIS*     2.9    32.4    +      -       -      +
    286C  ILE*     3.5    32.9    +      -       +      +
    308C  ILE*     4.3    17.9    -      -       +      -
    367C  VAL*     4.3     7.6    +      -       -      +
    370C  LYS*     3.8    33.2    -      -       +      +
    371C  ALA*     3.8    26.2    -      -       +      -
    374C  LEU*     4.0    12.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 283 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    279C  ILE      3.0    10.8    +      -       -      +
    280C  ILE*     3.1    11.8    +      -       -      +
    282C  TRP*     1.3    86.4    -      -       +      +
    284C  LYS*     1.3    61.9    +      -       -      +
    286C  ILE*     3.2    17.6    +      -       -      +
    289C  PHE*     3.1    44.0    -      -       +      +
    301C  LEU*     4.3    10.5    -      -       +      -
    374C  LEU*     3.9    16.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 284 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    280C  ILE*     3.8    15.0    -      -       -      +
    281C  GLY*     3.9    18.4    -      -       -      +
    282C  TRP      3.1     0.2    -      -       -      -
    283C  ALA*     1.3    78.0    -      -       -      +
    285C  HIS*     1.3    61.8    +      -       +      +
    286C  ILE      3.4     8.3    +      -       -      +
    289C  PHE*     4.1     5.8    -      -       +      -
    290C  SER*     3.2    30.6    +      -       -      +
    297C  GLN*     5.5     2.5    -      -       -      +
   1327I  ALA*     3.2    13.9    +      -       -      +
   1328I  LEU*     4.3    26.9    -      -       +      +
   1330I  GLY      2.6    38.2    +      -       -      +
----------------------------------------------------------
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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