Contacts of the helix formed by residues 342 - 366 (chain B) in PDB entry 2VF8


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 ARG 342 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    130B  TYR*     5.9     1.0    -      -       -      -
    338B  ARG*     2.7    28.2    +      -       -      +
    339B  VAL      3.1     4.1    -      -       -      +
    340B  LYS      3.1     1.6    -      -       -      -
    341B  ASN*     1.3    92.7    -      -       -      +
    343B  PRO*     1.4    62.3    -      -       -      +
    344B  GLU*     2.8    44.3    +      -       -      -
    345B  GLN*     3.5    37.2    +      -       +      +
    346B  ALA*     3.3    17.2    +      -       -      +
   1848B  SO4      2.6    32.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with PRO 343 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    339B  VAL*     3.0    18.2    -      -       +      +
    340B  LYS*     3.5    11.7    -      -       -      +
    341B  ASN      4.0     2.0    -      -       -      +
    342B  ARG*     1.4    85.4    -      -       -      +
    344B  GLU*     1.3    78.4    +      -       +      +
    345B  GLN      3.4     0.8    +      -       -      -
    346B  ALA*     4.6     1.1    -      -       +      +
    347B  ILE*     3.7    28.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 344 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    341B  ASN      4.8     0.5    -      -       -      +
    342B  ARG*     2.8    47.7    +      -       -      -
    343B  PRO*     1.3    92.1    -      -       +      +
    345B  GLN*     1.3    68.0    +      -       -      +
    347B  ILE*     4.2     2.8    +      -       -      +
    348B  ALA*     3.7    16.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 345 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    126B  ARG      4.5    11.4    -      -       -      +
    127B  ALA*     3.9    22.7    -      -       -      +
    128B  GLY      4.6     1.9    +      -       -      +
    338B  ARG*     3.0    37.6    +      -       -      +
    342B  ARG*     3.5    49.1    +      -       +      +
    344B  GLU*     1.3    86.1    +      -       -      +
    346B  ALA*     1.3    73.5    +      -       -      +
    347B  ILE      3.3     0.2    -      -       -      -
    348B  ALA*     3.1     8.2    +      -       -      +
    349B  LEU*     2.7    35.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 346 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    332B  GLU*     5.5     0.6    -      -       -      +
    335B  HIS*     5.1     5.1    +      -       +      +
    338B  ARG*     4.2     7.0    -      -       +      +
    339B  VAL*     3.5    32.3    -      -       +      +
    342B  ARG      3.3    20.0    +      -       -      +
    343B  PRO      3.9     2.0    +      -       -      +
    344B  GLU      3.6     0.2    -      -       -      -
    345B  GLN*     1.3    89.7    -      -       -      +
    347B  ILE*     1.3    62.3    +      -       +      +
    349B  LEU*     3.3    11.7    +      -       +      +
    350B  GLN*     3.2    23.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 347 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    339B  VAL*     5.9     3.8    -      -       +      -
    343B  PRO*     3.7    18.3    +      -       +      +
    344B  GLU      4.5     2.9    -      -       -      +
    345B  GLN      3.3     0.4    -      -       -      -
    346B  ALA*     1.3    78.3    -      -       +      +
    348B  ALA*     1.3    63.0    +      -       -      +
    349B  LEU      3.2     0.2    +      -       -      -
    350B  GLN*     4.1     5.0    -      -       -      +
    351B  ARG*     3.2    27.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 348 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    126B  ARG*     5.2     9.4    -      -       +      +
    127B  ALA*     5.7     0.9    -      -       +      -
    344B  GLU      3.7    13.5    +      -       -      +
    345B  GLN*     3.1    11.9    +      -       -      +
    347B  ILE*     1.3    77.8    -      -       -      +
    349B  LEU*     1.3    50.6    +      -       -      +
    351B  ARG*     4.0    17.3    -      -       -      +
    352B  MET*     2.8    56.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 349 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    123B  LEU*     4.5     7.6    -      -       +      -
    127B  ALA*     4.3    22.2    -      -       +      -
    304B  PHE*     3.9    30.3    -      -       +      -
    327B  TYR*     3.9    23.3    -      -       +      +
    332B  GLU*     3.5    24.7    -      -       -      +
    338B  ARG*     3.9    22.2    -      -       -      +
    345B  GLN*     2.7    20.0    +      -       -      +
    346B  ALA*     3.5    13.5    -      -       +      +
    347B  ILE      3.1     0.4    -      -       -      -
    348B  ALA*     1.3    72.0    -      -       -      +
    350B  GLN*     1.3    62.3    +      -       +      +
    352B  MET*     3.9     3.7    -      -       -      +
    353B  ALA*     3.0    29.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 350 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    327B  TYR      4.1    13.7    -      -       -      +
    328B  ALA      3.2    28.6    +      -       -      +
    330B  GLU*     3.6    31.7    -      -       +      +
    332B  GLU*     5.6     0.7    -      -       -      +
    335B  HIS*     6.2     0.2    -      -       -      +
    346B  ALA      3.2    15.0    +      -       -      +
    347B  ILE*     4.1     5.1    -      -       -      +
    349B  LEU*     1.3    73.3    -      -       +      +
    351B  ARG*     1.3    83.2    +      -       -      +
    352B  MET      3.0     1.6    -      -       -      -
    353B  ALA*     2.9     2.5    +      -       -      +
    354B  ALA*     2.7    53.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 351 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    122B  MET*     5.4     6.3    -      -       -      +
    347B  ILE*     3.2    18.2    +      -       +      +
    348B  ALA*     4.1    13.3    +      -       -      +
    350B  GLN*     1.3    93.4    +      -       -      +
    352B  MET*     1.3    93.2    +      -       -      +
    354B  ALA*     4.3     2.1    -      -       -      +
    355B  ASP*     3.5    21.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 352 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    119B  LEU*     4.9    11.8    -      -       +      +
    122B  MET*     3.4    40.4    -      -       +      +
    123B  LEU*     3.8    26.2    -      -       +      +
    126B  ARG*     4.8    16.2    -      -       +      -
    127B  ALA*     5.4     1.3    -      -       -      -
    348B  ALA*     2.8    33.6    +      -       +      +
    349B  LEU*     3.9     5.4    -      -       -      +
    351B  ARG*     1.3   109.3    -      -       -      +
    353B  ALA*     1.3    69.1    +      -       -      +
    355B  ASP*     3.6     6.5    +      -       -      +
    356B  LEU*     3.6    23.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 353 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    123B  LEU*     4.4     4.7    -      -       +      +
    324B  LEU*     3.9    27.8    -      -       +      +
    327B  TYR*     4.3     5.4    -      -       +      -
    328B  ALA*     3.5    26.2    -      -       +      +
    349B  LEU*     3.0    20.5    +      -       +      +
    350B  GLN*     2.9     4.2    +      -       -      +
    352B  MET*     1.3    76.5    -      -       -      +
    354B  ALA*     1.3    54.8    +      -       -      +
    356B  LEU*     2.8    28.2    +      -       -      +
    357B  VAL*     3.1    11.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 354 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    328B  ALA*     3.6    15.5    -      -       +      +
    350B  GLN*     2.7    39.3    +      -       -      +
    351B  ARG*     4.3     3.4    -      -       -      +
    353B  ALA*     1.3    73.4    -      -       -      +
    355B  ASP*     1.3    56.2    +      -       -      +
    357B  VAL*     4.0     7.1    -      -       +      +
    358B  LYS*     3.1    28.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 355 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    119B  LEU*     3.9    16.6    -      -       +      +
    351B  ARG*     3.5    17.3    +      -       -      +
    352B  MET*     3.8     7.6    -      -       -      +
    353B  ALA      3.0     1.0    +      -       -      -
    354B  ALA*     1.3    75.2    -      -       -      +
    356B  LEU*     1.3    61.3    +      -       -      +
    358B  LYS*     3.6    15.4    -      -       -      +
    359B  ARG*     3.1    70.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 356 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    116B  LEU*     4.1    31.0    -      -       +      +
    119B  LEU*     3.6    39.3    -      -       +      +
    120B  LEU*     4.3    25.6    -      -       +      -
    123B  LEU*     4.3    16.8    -      -       +      -
    320B  VAL*     6.4     0.4    -      -       +      -
    324B  LEU*     4.3    20.0    -      -       +      -
    352B  MET*     3.6    17.5    +      -       +      +
    353B  ALA      2.8    10.3    +      -       -      +
    355B  ASP*     1.3    71.8    -      -       -      +
    357B  VAL*     1.3    57.3    +      -       -      +
    359B  ARG*     3.3     4.4    +      -       -      +
    360B  LEU*     2.8    43.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 357 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    321B  SER*     4.4    13.2    -      -       -      +
    324B  LEU*     4.3     7.4    -      -       +      -
    325B  ARG*     3.7    53.2    -      -       +      +
    328B  ALA*     4.5     6.7    -      -       +      -
    353B  ALA      3.1    14.1    +      -       -      +
    354B  ALA*     4.0    10.5    -      -       -      +
    356B  LEU*     1.3    75.4    -      -       -      +
    358B  LYS*     1.3    55.2    +      -       -      +
    360B  LEU*     2.9     7.9    +      -       -      -
    361B  ASP*     2.8    51.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 358 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    354B  ALA      3.1    20.6    +      -       -      +
    355B  ASP*     3.6    20.0    -      -       -      +
    357B  VAL*     1.3    78.9    -      -       -      +
    359B  ARG*     1.3    64.6    +      -       +      +
    361B  ASP*     3.3    15.4    +      -       -      +
    362B  VAL*     3.7    13.3    +      -       -      +
    395B  TYR*     5.2     5.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 359 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    115B  THR*     4.2    11.0    +      -       -      +
    116B  LEU*     3.6    25.8    -      -       +      -
    119B  LEU*     4.5    15.2    -      -       -      +
    355B  ASP*     3.1    58.6    +      -       -      +
    356B  LEU*     3.3     4.5    +      -       -      +
    358B  LYS*     1.3    78.7    -      -       +      +
    360B  LEU*     1.3    59.1    +      -       -      +
    362B  VAL*     3.5     1.6    -      -       -      +
    363B  LEU*     3.1    22.8    +      -       -      +
    395B  TYR*     3.2    75.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 360 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    116B  LEU*     3.7    15.7    -      -       +      -
    317B  LEU*     3.4    53.8    -      -       +      +
    320B  VAL*     4.0    16.6    -      -       +      -
    321B  SER*     3.6    32.3    -      -       -      -
    324B  LEU*     4.6     2.7    -      -       +      -
    356B  LEU*     2.8    36.7    +      -       +      +
    357B  VAL*     2.9     5.3    +      -       -      +
    359B  ARG*     1.3    73.3    -      -       -      +
    361B  ASP*     1.3    60.6    +      -       -      +
    363B  LEU*     3.2     8.9    +      -       +      +
    364B  LEU*     2.7    31.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 361 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    321B  SER*     4.4     8.0    +      -       -      -
    325B  ARG*     3.7    22.7    +      -       -      -
    357B  VAL*     2.8    33.9    +      -       -      +
    358B  LYS*     3.3     7.6    +      -       -      +
    359B  ARG      3.3     0.2    -      -       -      -
    360B  LEU*     1.3    75.3    -      -       -      +
    362B  VAL*     1.3    60.9    +      -       -      +
    364B  LEU*     2.8    10.4    +      -       +      +
    365B  HIS*     2.5    54.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 362 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    358B  LYS      3.7    11.1    +      -       -      +
    359B  ARG      3.5     7.8    +      -       -      +
    361B  ASP*     1.3    78.1    -      -       -      +
    363B  LEU*     1.3    67.1    +      -       -      +
    364B  LEU      2.9     0.2    +      -       -      -
    365B  HIS*     3.4    10.0    +      -       -      +
    366B  LEU*     3.5    17.8    +      -       +      +
    391B  ALA*     3.2    32.8    -      -       -      +
    394B  LEU*     3.7    29.6    -      -       +      -
    395B  TYR*     4.2    17.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 363 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    114B  THR*     3.7    18.4    -      -       +      -
    116B  LEU*     5.0     3.4    -      -       +      -
    317B  LEU*     4.2    19.7    -      -       +      -
    359B  ARG      3.1    13.6    +      -       -      +
    360B  LEU*     3.2    15.9    -      -       +      +
    361B  ASP      3.1     0.8    -      -       -      -
    362B  VAL*     1.3    79.6    -      -       -      +
    364B  LEU*     1.3    52.9    +      -       +      +
    366B  LEU      2.6    23.7    -      -       -      +
    368B  LEU*     3.0    35.6    -      -       +      +
    369B  GLY      4.9     0.2    -      -       -      -
    388B  LEU*     3.5    28.7    -      -       +      -
    391B  ALA*     3.9    16.2    -      -       +      -
    392B  THR      4.8     0.2    -      -       -      +
    395B  TYR*     3.4    27.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 364 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    317B  LEU*     3.9    25.6    -      -       +      +
    318B  ALA*     4.0     9.6    -      -       +      +
    321B  SER*     4.3    15.7    -      -       -      +
    322B  GLU*     6.3     0.7    -      -       +      -
    325B  ARG*     5.3     5.6    -      -       -      +
    360B  LEU*     2.7    27.6    +      -       +      +
    361B  ASP*     2.8    15.9    +      -       +      +
    363B  LEU*     1.3    68.8    -      -       -      +
    365B  HIS*     1.3    62.8    +      -       +      +
    366B  LEU      2.6    16.3    -      -       -      +
    367B  GLY*     3.7     1.7    -      -       -      -
    369B  GLY*     3.8    18.6    -      -       -      -
   1849B  SO4      2.8    38.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 365 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    361B  ASP*     2.5    45.2    +      -       +      +
    362B  VAL*     4.2     4.3    -      -       -      +
    364B  LEU*     1.3    74.3    -      -       +      +
    366B  LEU*     1.3    62.2    +      -       +      +
    367B  GLY*     3.4     3.3    +      -       -      -
    419B  ALA*     3.8    13.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 366 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    362B  VAL*     3.5    26.5    -      -       +      +
    363B  LEU      2.6    11.2    -      -       -      +
    364B  LEU      2.6    11.8    -      -       -      +
    365B  HIS*     1.3    73.0    -      -       +      +
    367B  GLY*     1.3    52.2    +      -       -      +
    368B  LEU*     2.4    33.7    +      -       +      -
    387B  ARG*     3.4    49.6    -      -       +      +
    390B  LEU*     4.3     6.5    -      -       +      -
    391B  ALA*     4.6     3.8    -      -       +      +
    394B  LEU*     4.7     2.2    -      -       +      -
    419B  ALA*     4.1    17.9    -      -       -      +
    420B  LEU*     5.1     3.6    -      -       -      -
    423B  ALA*     3.7    32.5    -      -       +      -
----------------------------------------------------------
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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