Contacts of the helix formed by residues 346 - 368 (chain B) in PDB entry 4P3N


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 LEU 346 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    419A  MET*     3.7    31.9    -      -       +      +
    422A  HIS*     4.3    20.6    -      -       +      +
    425A  ARG*     4.9     8.7    -      -       -      +
    434A  LEU*     6.3     0.7    -      -       +      -
    327B  GLY      5.6     0.2    -      -       -      +
    331B  GLU*     3.5    41.1    -      -       +      +
    332B  LEU      2.7    16.5    +      -       -      +
    333B  TYR      4.8     1.6    -      -       -      +
    334B  PHE*     4.0    22.4    -      -       +      -
    344B  PHE      3.6     1.0    +      -       -      -
    345B  PHE*     1.3    71.7    -      -       -      +
    347B  PRO*     1.4    70.2    -      -       +      +
    348B  LYS      2.8    13.8    +      -       -      -
    349B  GLY      2.9     3.6    +      -       -      -
    350B  ALA      2.9    17.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with PRO 347 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    370A  GLN*     3.6    48.7    -      -       +      +
    371A  GLU      3.2    16.8    -      -       -      +
    372A  VAL*     3.6    16.6    -      -       +      -
    434A  LEU*     4.5     7.9    -      -       +      -
    346B  LEU*     1.4    93.2    -      -       +      +
    348B  LYS*     1.3    60.6    +      -       +      +
    350B  ALA*     3.6     2.2    -      -       -      +
    351B  TYR*     2.9    26.0    +      -       -      +
    647B  MET*     5.0     4.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 348 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    370A  GLN*     5.2    10.7    -      -       -      +
    330B  GLN      4.0     3.8    -      -       -      +
    331B  GLU*     3.9    13.4    +      -       +      +
    332B  LEU*     3.8    10.3    -      -       +      -
    346B  LEU*     2.8     5.7    +      -       -      +
    347B  PRO*     1.3    74.4    -      -       +      +
    349B  GLY*     1.3    63.7    +      -       -      +
    350B  ALA      3.1     1.1    -      -       -      -
    351B  TYR*     3.0     8.7    +      -       -      +
    352B  ILE*     3.0    26.5    +      -       -      +
    618B  PRO*     3.5    29.5    +      -       +      +
    619B  ARG*     3.1    54.3    -      -       -      +
    647B  MET*     4.9     9.4    -      -       +      +
    649B  ASP*     4.8    11.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 349 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    332B  LEU*     3.6    29.7    +      -       -      +
    333B  TYR*     5.0     0.4    -      -       -      -
    345B  PHE*     3.7    19.2    -      -       -      -
    346B  LEU      2.9     6.2    +      -       -      -
    348B  LYS*     1.3    78.4    -      -       -      +
    350B  ALA*     1.3    56.1    +      -       -      +
    352B  ILE*     3.2    12.9    +      -       -      +
    353B  TYR*     2.9    26.5    +      -       -      +
    601B  ILE*     4.5     0.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 350 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    371A  GLU*     3.3    28.0    -      -       +      +
    372A  VAL*     3.7    19.5    -      -       -      -
    373A  VAL*     4.0     7.2    -      -       +      +
    345B  PHE*     3.8     5.4    -      -       -      +
    346B  LEU      2.9    13.3    +      -       -      +
    347B  PRO      3.6     0.7    -      -       -      +
    349B  GLY*     1.3    75.2    -      -       -      +
    351B  TYR*     1.3    58.9    +      -       -      +
    353B  TYR*     3.2     9.5    +      -       -      +
    354B  ASN*     2.9    40.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 351 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    347B  PRO      2.9    16.1    +      -       -      +
    348B  LYS*     3.2    12.1    -      -       -      +
    350B  ALA*     1.3    77.1    -      -       -      +
    352B  ILE*     1.3    57.6    +      -       -      +
    354B  ASN*     3.5     5.8    +      -       +      +
    355B  ALA*     2.9    33.9    +      -       +      +
    615B  TRP      3.3    17.2    +      -       -      -
    616B  LEU      3.7    17.3    -      -       -      -
    617B  SER      3.2    27.4    -      -       -      -
    618B  PRO*     3.9     8.1    -      -       +      -
    620B  GLN*     3.4    18.0    +      -       -      -
    645B  LYS      5.4     4.7    +      -       -      -
    647B  MET*     3.8    34.5    -      -       +      -
    712B  LYS*     5.6     1.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 352 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    332B  LEU*     3.9    13.9    -      -       +      -
    333B  TYR*     6.1     0.2    -      -       +      -
    348B  LYS      3.0    12.1    +      -       -      +
    349B  GLY*     3.2    11.4    +      -       -      +
    351B  TYR*     1.3    74.8    -      -       -      +
    353B  TYR*     1.3    65.3    +      -       -      +
    355B  ALA*     3.2     6.4    +      -       -      +
    356B  LEU*     2.9    35.5    +      -       +      +
    601B  ILE*     4.4    13.0    -      -       +      -
    612B  TRP*     3.8    41.1    -      -       +      -
    616B  LEU*     3.6    33.2    -      -       +      +
    618B  PRO*     3.7    21.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 353 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    373A  VAL*     4.1    19.1    -      -       +      -
    345B  PHE*     3.7    30.1    -      +       -      -
    349B  GLY      2.9    11.0    +      -       -      +
    350B  ALA*     3.2    13.7    -      -       -      +
    352B  ILE*     1.3    77.2    -      -       -      +
    354B  ASN*     1.3    68.3    +      -       -      +
    356B  LEU*     3.2     2.9    +      -       -      +
    357B  ILE*     3.0    50.7    +      -       +      +
    457B  ARG*     3.2    12.7    +      -       -      -
    459B  GLN*     3.4    25.4    -      -       -      +
    597B  VAL*     3.6    27.6    -      -       +      +
    598B  GLU*     2.6    33.3    +      -       -      -
    601B  ILE*     3.8    16.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 354 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    361A  ARG*     3.5    28.8    +      -       -      +
    371A  GLU*     3.6    32.6    +      -       -      +
    373A  VAL*     5.4     4.3    -      -       -      +
    350B  ALA*     2.9    20.6    +      -       -      +
    351B  TYR*     4.0     5.6    -      -       +      +
    353B  TYR*     1.3    89.0    -      -       -      +
    355B  ALA*     1.3    56.5    +      -       -      +
    357B  ILE*     3.8    10.9    -      -       -      +
    358B  GLU*     2.9    30.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 355 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    351B  TYR*     2.9    29.1    +      -       +      +
    352B  ILE*     3.4     6.5    -      -       -      +
    353B  TYR      3.2     0.2    -      -       -      -
    354B  ASN*     1.3    74.1    -      -       -      +
    356B  LEU*     1.3    59.4    +      -       -      +
    358B  GLU*     3.3     6.9    +      -       -      +
    359B  PHE*     2.9    28.1    +      -       -      +
    615B  TRP*     4.0    23.8    -      -       +      +
    616B  LEU*     4.0    15.5    -      -       +      -
    715B  ARG*     4.9     1.2    +      -       -      -
----------------------------------------------------------
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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
----------------------------------------------------------
    352B  ILE*     2.9    20.3    +      -       +      +
    353B  TYR      3.6     5.8    -      -       -      +
    355B  ALA*     1.3    75.8    -      -       -      +
    357B  ILE*     1.3    65.3    +      -       -      +
    359B  PHE*     3.1     9.1    +      -       +      +
    360B  ILE*     3.0    27.0    +      -       -      +
    490B  PHE*     3.7    32.5    -      -       +      -
    594B  LEU*     4.3    15.2    -      -       +      +
    597B  VAL*     4.4    16.4    -      -       +      +
    600B  MET*     4.6     8.5    -      -       +      -
    601B  ILE*     3.7    29.8    -      -       +      -
    604B  LEU*     4.2    11.7    -      -       +      -
    615B  TRP*     4.1     4.3    -      -       +      -
    616B  LEU*     3.9    18.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 357 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    353B  TYR*     3.0    45.5    +      -       +      +
    354B  ASN*     3.8    12.3    -      -       -      +
    356B  LEU*     1.3    74.5    -      -       -      +
    358B  GLU*     1.3    56.0    +      -       -      +
    360B  ILE*     3.3     4.5    +      -       -      +
    361B  ARG*     2.9    61.7    +      -       -      +
    437B  PHE*     3.8    30.7    -      -       +      -
    459B  GLN*     3.9    13.0    -      -       -      +
    594B  LEU*     6.0     0.2    -      -       -      -
    597B  VAL*     4.0    17.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 358 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    354B  ASN      2.9    18.5    +      -       -      +
    355B  ALA*     3.6     7.0    -      -       -      +
    357B  ILE*     1.3    73.4    -      -       -      +
    359B  PHE*     1.3    61.2    +      -       -      +
    361B  ARG*     4.3    14.8    +      -       -      +
    362B  SER*     2.9    28.2    +      -       -      -
    365B  ARG*     2.9    38.6    +      -       -      -
    715B  ARG*     4.2     9.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 359 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    355B  ALA      2.9    13.0    +      -       -      +
    356B  LEU*     3.2    11.9    -      -       +      +
    358B  GLU*     1.3    74.0    -      -       -      +
    360B  ILE*     1.3    71.0    +      -       +      +
    362B  SER*     2.3    25.5    +      -       -      -
    363B  GLU*     3.0    26.8    +      -       +      +
    485B  THR*     5.3     0.9    -      -       +      -
    486B  VAL*     3.6    44.6    -      -       +      -
    489B  VAL*     3.5    33.7    -      -       +      -
    490B  PHE*     4.4    11.4    -      +       -      -
    594B  LEU*     5.8     0.4    -      -       +      -
    615B  TRP*     4.1    14.8    -      +       +      -
    715B  ARG*     3.2    46.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 360 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    356B  LEU      3.0    16.1    +      -       -      +
    357B  ILE*     3.6     6.5    -      -       -      +
    359B  PHE*     1.3    79.0    -      -       +      +
    361B  ARG*     1.3    56.6    +      -       -      +
    363B  GLU*     3.2     8.6    +      -       -      +
    364B  TYR*     2.9    61.6    +      -       +      +
    437B  PHE*     3.6    14.6    -      -       +      -
    461B  ASP*     3.9    15.9    -      -       +      +
    482B  PHE*     5.0     5.4    -      -       +      -
    486B  VAL*     4.6    22.2    -      -       +      -
    593B  ILE*     5.0     3.4    -      -       +      -
    594B  LEU*     3.6    37.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 361 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    354A  ASN*     3.6    27.0    +      -       -      +
    361A  ARG*     5.1    10.5    -      -       -      +
    357B  ILE*     2.9    34.8    +      -       -      +
    358B  GLU*     3.7    18.3    +      -       -      +
    360B  ILE*     1.3    73.6    -      -       -      +
    362B  SER*     1.3    60.8    +      -       -      +
    364B  TYR*     3.0    11.6    +      -       +      +
    365B  ARG*     2.9    50.3    +      -       +      +
    371B  GLU*     2.8    40.5    +      -       -      +
    437B  PHE*     3.5    26.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 362 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    358B  GLU*     2.9    16.3    +      -       -      -
    359B  PHE*     2.3    35.2    +      -       -      -
    361B  ARG*     1.3    75.2    -      -       -      +
    363B  GLU*     1.3    64.1    +      -       -      +
    365B  ARG*     3.7    25.8    +      -       -      +
    366B  LYS*     3.5    27.7    +      -       -      +
    715B  ARG*     3.7    17.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 363 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    359B  PHE*     3.0    33.0    +      -       +      +
    360B  ILE*     3.6     5.8    -      -       -      +
    361B  ARG      3.1     0.2    -      -       -      -
    362B  SER*     1.3    84.1    +      -       -      +
    364B  TYR*     1.3    59.5    +      -       -      +
    366B  LYS*     3.2    30.6    +      -       -      +
    367B  ARG*     2.9    63.1    +      -       -      +
    482B  PHE*     3.3    27.8    -      -       +      -
    485B  THR*     3.9    17.5    -      -       -      +
    486B  VAL*     4.7     3.8    -      -       +      -
    715B  ARG*     5.6     0.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 364 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    360B  ILE*     2.9    38.0    +      -       +      +
    361B  ARG*     3.0    18.8    +      -       +      +
    363B  GLU*     1.3    76.8    -      -       -      +
    365B  ARG*     1.3    62.3    +      -       +      +
    367B  ARG      3.2     0.2    +      -       -      -
    368B  GLY*     3.1     6.9    +      -       -      -
    369B  PHE*     3.0    61.0    +      +       +      +
    371B  GLU*     5.2     5.4    -      -       +      +
    435B  ALA*     3.4    27.0    -      -       +      +
    436B  ASP      5.5     0.4    -      -       -      -
    437B  PHE*     3.9    16.8    -      +       -      -
    461B  ASP*     4.0    16.5    +      -       -      +
    462B  ASP      4.1     2.3    +      -       -      -
    463B  ALA*     4.2     3.1    -      -       +      +
    482B  PHE*     3.7    27.8    -      +       -      -
    591B  ARG*     3.8    23.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 365 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    639A  GLN*     5.8     0.7    +      -       -      -
    642A  HIS*     3.3    42.3    +      -       +      +
    643A  ASP*     5.0     2.3    -      -       -      +
    645A  LYS*     4.6    27.5    -      -       -      +
    358B  GLU*     2.9    30.5    +      -       -      -
    361B  ARG*     2.9    30.8    +      -       +      +
    362B  SER*     3.7    23.1    -      -       -      +
    363B  GLU      3.3     0.4    -      -       -      -
    364B  TYR*     1.3    76.7    -      -       +      +
    366B  LYS*     1.3    62.2    +      -       +      +
    368B  GLY*     4.3     2.6    +      -       -      -
    369B  PHE      4.9     3.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 366 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    639A  GLN*     4.8    10.0    +      -       -      +
    643A  ASP*     4.6    21.5    -      -       +      +
    362B  SER*     3.5    16.8    -      -       -      +
    363B  GLU*     3.2    35.4    +      -       -      +
    364B  TYR      3.1     0.6    -      -       -      -
    365B  ARG*     1.3    80.1    -      -       +      +
    367B  ARG*     1.3    65.8    +      -       +      +
    368B  GLY      3.5     0.6    +      -       -      -
    485B  THR*     6.2     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 367 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    363B  GLU*     2.9    41.2    +      -       -      +
    364B  TYR      3.2     0.6    +      -       -      -
    366B  LYS*     1.3    84.5    -      -       +      +
    368B  GLY*     1.3    60.9    +      -       -      +
    369B  PHE*     3.5    24.1    -      -       +      -
    433B  ARG*     4.1    11.1    +      -       -      -
    478B  GLY*     4.0     5.5    +      -       -      -
    481B  ASP*     2.5    33.3    +      -       -      +
    482B  PHE*     3.4    47.4    -      -       -      +
    485B  THR*     3.0    28.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 368 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    642A  HIS*     5.8     5.2    -      -       -      -
    364B  TYR      3.1     3.5    +      -       -      -
    365B  ARG      4.3     3.4    +      -       -      -
    366B  LYS      3.5     3.4    +      -       -      -
    367B  ARG*     1.3    78.2    -      -       -      +
    369B  PHE*     1.3    61.4    +      -       -      +
    370B  GLN*     4.0     6.6    +      -       -      +
    433B  ARG*     3.2    33.2    +      -       -      +
----------------------------------------------------------
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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