Contacts of the helix formed by residues 260 - 285 (chain F) in PDB entry 5MGX


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 THR 260 (chain F).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    259F  MET*     1.3    76.5    -      -       -      +
    261F  PHE*     1.3    64.1    +      -       -      +
    262F  GLU*     3.8    16.4    +      -       -      +
    263F  GLU*     2.8    41.2    +      -       -      +
    264F  GLU*     3.1    22.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 261 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    260F  THR*     1.3    72.4    -      -       -      +
    262F  GLU*     1.3    77.7    +      -       +      +
    264F  GLU*     3.2    13.1    +      -       +      +
    265F  ALA*     2.9    42.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 262 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    260F  THR*     3.8    14.9    -      -       -      +
    261F  PHE*     1.3    99.7    +      -       +      +
    263F  GLU*     1.3    57.1    +      -       +      +
    265F  ALA*     3.7     5.3    +      -       -      +
    266F  GLN*     3.1    29.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 263 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    213F  THR*     5.3     1.4    +      -       -      -
    214F  GLY*     3.8    21.1    +      -       -      -
    215F  GLN*     3.8    28.0    +      -       +      +
    218F  VAL*     5.0     1.3    -      -       +      +
    259F  MET*     3.3    17.5    -      -       +      +
    260F  THR*     2.8    46.4    +      -       -      +
    261F  PHE      3.2     0.6    -      -       -      -
    262F  GLU*     1.3    76.1    -      -       +      +
    264F  GLU*     1.4    59.0    +      -       -      +
    266F  GLN*     3.4    13.5    +      -       -      +
    267F  LEU*     3.0    38.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 264 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    254F  SER*     5.0     2.6    +      -       -      -
    257F  VAL      5.4     0.9    -      -       -      +
    259F  MET*     3.2    40.5    +      -       +      +
    260F  THR      3.1    20.4    +      -       -      +
    261F  PHE*     3.2    13.9    +      -       +      +
    263F  GLU*     1.4    72.6    -      -       -      +
    265F  ALA*     1.4    56.9    +      -       -      +
    267F  LEU*     3.3     9.3    +      -       -      +
    268F  LEU*     3.0    37.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 265 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    261F  PHE*     2.9    33.6    +      -       +      +
    262F  GLU*     3.9     7.0    -      -       -      +
    264F  GLU*     1.4    72.8    -      -       -      +
    266F  GLN*     1.4    58.8    +      -       -      +
    268F  LEU*     3.1    13.8    +      -       -      +
    269F  GLN*     3.0    33.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 266 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    218F  VAL*     3.8    36.1    -      -       +      +
    222F  ASN*     5.9     0.2    -      -       -      +
    262F  GLU      3.1    19.6    +      -       -      +
    263F  GLU*     3.4    13.4    +      -       -      +
    265F  ALA*     1.4    74.2    -      -       -      +
    267F  LEU*     1.4    59.1    +      -       -      +
    269F  GLN*     3.4    10.1    +      -       -      +
    270F  LEU*     3.2    25.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 267 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    214F  GLY*     4.3     7.9    -      -       -      +
    217F  ARG*     3.9    39.0    -      -       +      +
    218F  VAL*     3.9    14.1    -      -       +      -
    251F  ILE*     3.6    43.4    -      -       +      +
    259F  MET*     3.8    30.7    -      -       +      -
    263F  GLU*     3.0    21.7    +      -       +      +
    264F  GLU*     3.7     6.1    -      -       -      +
    266F  GLN*     1.4    73.0    -      -       -      +
    268F  LEU*     1.4    59.4    +      -       -      +
    269F  GLN      3.4     0.2    -      -       -      -
    270F  LEU*     3.4     9.8    +      -       +      +
    271F  LYS*     3.0    28.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 268 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    264F  GLU*     3.0    21.4    +      -       +      +
    265F  ALA*     3.1    15.7    +      -       -      +
    267F  LEU*     1.4    71.9    -      -       -      +
    269F  GLN*     1.3    68.3    +      -       -      +
    271F  LYS*     3.3    21.6    +      -       -      +
    272F  VAL*     3.2    30.6    +      -       +      +
    301F  HIS*     3.6    34.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 269 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    265F  ALA*     3.0    19.2    +      -       +      +
    266F  GLN*     3.5    11.0    -      -       -      +
    268F  LEU*     1.3    80.1    -      -       -      +
    270F  LEU*     1.3    58.7    +      -       -      +
    272F  VAL*     3.8     6.5    +      -       -      +
    273F  LYS*     3.4    33.6    +      -       +      +
    302F  GLN*     3.7    26.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 270 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    218F  VAL*     3.9    15.7    -      -       +      +
    221F  ALA*     3.7    27.1    -      -       +      -
    222F  ASN*     3.5    40.8    -      -       -      +
    225F  ARG*     4.1    14.6    -      -       -      +
    251F  ILE*     4.0     8.7    -      -       +      -
    266F  GLN*     3.2    13.2    +      -       +      +
    267F  LEU*     3.5    16.2    -      -       +      +
    268F  LEU      3.2     0.4    -      -       -      -
    269F  GLN*     1.3    76.7    -      -       -      +
    271F  LYS*     1.3    58.9    +      -       -      +
    273F  LYS*     3.3    12.7    +      -       +      +
    274F  CYS*     3.0    36.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 271 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    248F  ILE*     4.9     9.4    -      -       +      -
    251F  ILE*     3.7    23.1    -      -       +      +
    252F  THR*     3.9    30.0    -      -       +      +
    267F  LEU      3.0    17.7    +      -       -      +
    268F  LEU*     3.3    28.3    +      -       +      +
    270F  LEU*     1.3    74.9    -      -       -      +
    272F  VAL*     1.4    52.7    +      -       -      +
    274F  CYS*     3.3     4.2    +      -       -      +
    275F  LEU*     2.8    54.2    +      -       +      +
    297F  LEU*     6.4     0.2    -      -       -      +
    301F  HIS*     4.5    14.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 272 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    268F  LEU      3.2    18.9    +      -       -      +
    269F  GLN*     4.0     6.3    -      -       -      +
    270F  LEU      3.4     0.2    -      -       -      -
    271F  LYS*     1.4    72.3    -      -       +      +
    273F  LYS*     1.3    61.4    +      -       +      +
    275F  LEU*     3.4     7.3    +      -       +      -
    276F  ASN*     3.0    29.9    +      -       -      +
    298F  VAL*     3.5    33.4    -      -       +      +
    301F  HIS*     3.7    35.0    -      -       +      +
    302F  GLN*     3.7    32.5    -      -       -      +
    305F  ASN*     4.5     2.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 273 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    709A  ASP*     4.2    39.9    +      -       +      +
    225F  ARG*     4.6    12.6    -      -       -      +
    269F  GLN*     3.4    20.8    +      -       -      +
    270F  LEU*     3.3    21.4    +      -       +      +
    272F  VAL*     1.3    78.5    -      -       +      +
    274F  CYS*     1.4    56.1    +      -       -      +
    276F  ASN*     3.5     5.3    +      -       -      +
    277F  ASN*     3.1    36.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with CYS 274 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    221F  ALA      4.8     1.8    -      -       -      -
    225F  ARG*     3.9    25.1    -      -       -      -
    244F  TYR*     3.8    12.2    -      -       +      +
    247F  ALA*     3.8    23.6    -      -       -      -
    248F  ILE*     3.8    21.1    -      -       +      -
    251F  ILE*     4.4     7.9    -      -       -      -
    270F  LEU*     3.0    29.4    +      -       -      +
    271F  LYS*     3.3     5.1    +      -       -      +
    273F  LYS*     1.4    72.6    -      -       -      +
    275F  LEU*     1.3    55.3    +      -       -      +
    277F  ASN*     3.4     8.8    +      -       -      +
    278F  LEU*     2.8    32.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 275 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    248F  ILE*     3.9    24.0    -      -       +      -
    271F  LYS*     2.8    43.5    +      -       +      +
    272F  VAL*     3.8     2.9    -      -       +      +
    274F  CYS*     1.3    68.4    -      -       -      +
    276F  ASN*     1.3    60.5    -      -       -      +
    278F  LEU*     3.4     9.4    +      -       +      +
    279F  ALA*     3.0    22.2    +      -       -      +
    294F  SER*     3.5    26.8    -      -       -      +
    297F  LEU*     4.1    41.5    -      -       +      +
    298F  VAL*     3.6    18.8    -      -       +      -
    301F  HIS*     5.6     4.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 276 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    709A  ASP*     4.7    10.4    +      -       -      +
    272F  VAL      3.0    16.8    +      -       -      +
    273F  LYS*     3.8     6.7    -      -       -      +
    275F  LEU*     1.3    74.7    -      -       -      +
    277F  ASN*     1.4    60.2    +      -       -      +
    279F  ALA*     3.2     8.1    +      -       -      +
    280F  ALA      2.9    23.9    +      -       -      -
    295F  CYS*     5.9     0.2    -      -       -      -
    298F  VAL*     3.5    13.6    -      -       +      +
    305F  ASN*     2.9    40.4    +      -       -      +
    307F  LYS*     3.8     6.3    -      -       -      +
    308F  ALA*     3.6    19.4    +      -       -      +
    311F  ARG*     3.1    36.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 277 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    708A  VAL*     3.3    16.2    -      -       -      +
    709A  ASP*     2.8    47.9    +      -       -      +
    225F  ARG*     4.1     6.7    -      -       -      +
    229F  ASN*     3.1    16.8    +      -       -      -
    244F  TYR*     3.4    25.4    -      -       +      -
    273F  LYS      3.1    23.2    +      -       -      +
    274F  CYS      3.5     5.8    -      -       -      +
    276F  ASN*     1.4    75.2    -      -       -      +
    278F  LEU*     1.3    62.0    +      -       -      +
    280F  ALA*     3.5     5.0    +      -       -      +
    281F  SER*     3.0    27.9    +      -       -      -
    311F  ARG*     5.0     1.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 278 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    241F  ALA*     3.4    40.8    -      -       +      +
    244F  TYR*     3.8    10.9    -      -       +      -
    245F  ASP*     4.5    11.4    -      -       +      +
    248F  ILE*     3.8    22.9    -      -       +      -
    274F  CYS      2.8    17.1    +      -       -      +
    275F  LEU*     3.5    12.3    -      -       +      +
    277F  ASN*     1.3    75.1    -      -       -      +
    279F  ALA*     1.4    51.6    +      -       -      +
    281F  SER*     3.1     4.0    +      -       -      -
    282F  GLN*     2.8    60.0    +      -       -      +
    294F  SER*     4.0    12.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 279 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    275F  LEU      3.0    14.1    +      -       -      +
    276F  ASN*     3.4    13.7    -      -       -      +
    278F  LEU*     1.4    72.3    -      -       -      +
    280F  ALA*     1.4    59.8    +      -       -      +
    281F  SER      3.2     0.2    +      -       -      -
    282F  GLN*     3.3    11.9    +      -       -      +
    283F  LEU*     2.9    33.6    +      -       -      +
    291F  ALA*     3.8    11.9    -      -       -      +
    294F  SER*     3.8     4.9    -      -       -      -
    295F  CYS*     3.8    30.5    -      -       -      +
    311F  ARG*     4.7     4.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 280 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    708A  VAL*     4.7     2.5    -      -       +      -
    232F  TYR*     3.8    25.5    +      -       +      +
    276F  ASN      2.9     8.4    +      -       -      +
    277F  ASN*     3.5    13.2    -      -       -      +
    279F  ALA*     1.4    75.3    -      -       -      +
    281F  SER*     1.3    59.5    +      -       -      +
    283F  LEU*     3.9     6.7    +      -       -      +
    284F  LYS*     3.3    28.1    +      -       -      +
    311F  ARG*     3.6    37.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 281 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    232F  TYR*     3.5    16.9    -      -       -      -
    237F  PHE*     3.8    23.1    -      -       -      +
    240F  ALA*     3.7     4.1    -      -       -      +
    241F  ALA*     4.1    12.6    -      -       -      -
    244F  TYR*     3.4    17.0    -      -       -      -
    277F  ASN      3.0    13.2    +      -       -      -
    278F  LEU*     3.1    10.0    +      -       -      -
    280F  ALA*     1.3    73.9    -      -       -      +
    282F  GLN*     1.3    64.0    +      -       -      +
    284F  LYS*     3.3    13.5    +      -       -      +
    285F  LEU*     3.3    19.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 282 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    241F  ALA*     5.2     4.7    -      -       +      -
    278F  LEU*     2.8    48.3    +      -       +      +
    281F  SER*     1.3    71.0    -      -       -      +
    283F  LEU*     1.4    55.7    +      -       -      +
    285F  LEU*     3.0    19.2    +      -       +      +
    287F  HIS*     2.9    40.2    +      -       +      +
    290F  ALA*     3.2    32.1    -      -       +      +
    291F  ALA*     3.4    18.7    -      -       +      -
    294F  SER*     2.7    26.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 283 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    706A  GLU*     5.6     1.3    -      -       -      +
    279F  ALA      2.9    16.9    +      -       -      +
    280F  ALA*     4.0     6.3    -      -       -      +
    282F  GLN*     1.4    73.8    -      -       -      +
    284F  LYS*     1.3    72.3    +      -       -      +
    286F  ASP*     3.2    19.1    +      -       -      +
    287F  HIS      4.9     1.3    -      -       -      +
    288F  TYR*     4.2     4.8    -      -       +      -
    291F  ALA*     3.9     5.7    -      -       +      +
    310F  PHE*     6.0     0.4    -      -       +      -
    311F  ARG*     4.0    34.5    -      -       +      +
    314F  LYS*     4.0    23.1    -      -       +      +
    315F  VAL*     3.5    28.9    -      -       +      +
    318F  GLN*     3.6    29.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 284 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    706A  GLU*     3.0    40.2    +      -       -      +
    232F  TYR*     4.4     8.3    +      -       -      +
    237F  PHE*     3.6    47.7    -      -       +      -
    280F  ALA      3.3    14.8    +      -       -      +
    281F  SER      3.3    10.5    +      -       -      +
    282F  GLN      3.3     0.6    -      -       -      -
    283F  LEU*     1.3    87.1    -      -       -      +
    285F  LEU*     1.3    59.5    +      -       -      +
    286F  ASP*     3.4     6.6    +      -       -      +
    314F  LYS*     4.7     5.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 285 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    237F  PHE*     3.7    39.7    -      -       +      +
    238F  VAL*     3.7    27.8    -      -       +      +
    241F  ALA*     4.9     6.3    -      -       +      -
    281F  SER      3.3    13.2    +      -       -      +
    282F  GLN*     3.0    12.7    +      -       +      +
    284F  LYS*     1.3    76.6    -      -       -      +
    286F  ASP*     1.4    68.8    +      -       -      +
    287F  HIS*     3.1     9.7    +      -       +      +
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


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

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

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