Contacts of the helix formed by residues 399 - 422 (chain A) in PDB entry 4PYP


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 PRO 399 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    254A  GLU*     4.8     0.2    -      -       -      +
    257A  VAL*     3.4    25.1    -      -       +      +
    262A  LEU*     3.8     7.8    -      -       +      +
    268A  TYR*     3.3    33.4    -      -       +      +
    395A  PHE*     3.7    23.1    -      -       +      -
    396A  SER*     3.1    28.0    -      -       -      +
    398A  GLY*     1.3    82.9    -      -       -      +
    400A  ARG*     1.3    62.9    +      -       -      +
    401A  PRO*     3.3     2.8    -      -       -      -
    402A  ALA*     3.3     4.6    +      -       -      +
    403A  ALA*     2.9    22.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 400 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    251A  MET*     5.3     8.5    -      -       -      -
    391A  VAL      4.2     1.3    -      -       -      +
    392A  ALA*     3.4    36.5    +      -       -      +
    395A  PHE*     2.9    32.0    +      -       +      +
    396A  SER*     3.0    15.4    +      -       -      +
    397A  GLN*     3.0    52.4    -      -       -      +
    399A  PRO*     1.3    77.9    -      -       -      +
    401A  PRO*     1.4    69.2    -      -       +      +
    403A  ALA*     3.3     3.5    -      -       -      +
    404A  ILE*     2.9    34.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with PRO 401 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    256A  LYS*     4.7    11.0    -      -       +      -
    257A  VAL      4.5     4.7    -      -       -      +
    397A  GLN      3.9     9.6    -      -       -      +
    398A  GLY      3.3    19.7    -      -       -      +
    399A  PRO      3.4     0.2    -      -       -      -
    400A  ARG*     1.4    93.2    -      -       +      +
    402A  ALA*     1.3    58.7    +      -       -      +
    404A  ILE*     2.8    29.4    +      -       +      +
    405A  ALA*     3.2    11.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 402 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    257A  VAL      3.1    24.2    +      -       -      +
    258A  THR*     3.4    24.7    -      -       -      +
    259A  ILE*     3.4    16.8    -      -       -      +
    262A  LEU*     4.0    10.5    -      -       +      -
    399A  PRO      3.3     7.1    +      -       -      +
    401A  PRO*     1.3    79.5    -      -       -      +
    403A  ALA*     1.3    59.7    +      -       -      +
    404A  ILE      3.3     0.7    +      -       -      -
    405A  ALA*     3.4     2.1    +      -       -      +
    406A  VAL*     3.0    28.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 403 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    262A  LEU*     3.7    11.8    -      -       -      +
    272A  ILE*     5.7     1.5    -      -       -      +
    275A  ALA*     5.5     1.7    -      -       -      +
    391A  VAL*     3.8    10.1    -      -       +      +
    395A  PHE*     3.4    41.5    -      -       +      -
    399A  PRO      2.9    13.6    +      -       -      +
    400A  ARG      3.3    10.8    -      -       -      +
    402A  ALA*     1.3    76.0    -      -       -      +
    404A  ILE*     1.3    57.9    +      -       -      +
    406A  VAL*     3.6     3.3    +      -       -      +
    407A  ALA*     3.0    26.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 404 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    388A  TRP*     4.2    24.0    -      -       +      +
    391A  VAL*     4.0    21.8    -      -       +      -
    392A  ALA*     4.9     8.1    -      -       +      +
    400A  ARG*     2.9    30.3    -      -       +      +
    401A  PRO*     2.8    16.8    +      -       +      +
    403A  ALA*     1.3    71.2    -      -       -      +
    405A  ALA*     1.3    59.2    +      -       -      +
    407A  ALA*     3.5     3.5    -      -       -      +
    408A  GLY*     2.8    29.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 405 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     80A  SER      5.6     6.3    -      -       -      +
     81A  PHE*     4.6    14.4    -      -       +      -
    259A  ILE*     3.5    29.8    -      -       +      -
    401A  PRO      3.2     9.2    +      -       -      +
    402A  ALA*     3.4     3.8    +      -       -      +
    404A  ILE*     1.3    77.1    -      -       -      +
    406A  VAL*     1.3    56.7    +      -       -      +
    408A  GLY*     3.7     1.7    +      -       -      -
    409A  PHE*     2.9    27.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 406 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    259A  ILE*     3.5    25.1    -      -       +      -
    262A  LEU*     4.1    13.0    -      -       +      -
    263A  PHE*     3.5    28.7    -      -       +      -
    272A  ILE*     4.2     4.5    -      -       +      -
    276A  VAL*     4.1    17.5    -      -       +      -
    402A  ALA      3.0    21.5    -      -       -      +
    403A  ALA      3.9     4.0    -      -       -      +
    404A  ILE      3.2     0.2    -      -       -      -
    405A  ALA*     1.3    73.8    -      -       -      +
    407A  ALA*     1.3    65.8    +      -       -      +
    409A  PHE*     3.0    14.1    +      -       +      +
    410A  SER*     3.0    26.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 407 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    275A  ALA*     5.1     3.4    -      -       +      +
    276A  VAL*     5.0     6.2    -      -       -      +
    279A  GLN*     3.2    34.0    -      -       -      +
    388A  TRP*     3.9    11.9    -      -       +      -
    391A  VAL*     4.4    14.1    -      -       +      -
    403A  ALA      3.0    15.4    +      -       -      +
    404A  ILE*     3.5     9.4    -      -       -      +
    406A  VAL*     1.3    75.5    -      -       -      +
    408A  GLY*     1.3    58.3    +      -       -      +
    410A  SER*     2.9    21.9    +      -       -      -
    411A  ASN      3.0     9.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 408 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     80A  SER*     5.7     5.6    -      -       -      -
    388A  TRP*     3.7    19.1    -      -       -      -
    404A  ILE*     2.8    19.4    +      -       -      -
    405A  ALA*     3.7     2.7    -      -       -      -
    407A  ALA*     1.3    72.7    -      -       -      +
    409A  PHE*     1.3    55.8    +      -       -      +
    411A  ASN*     3.7     4.4    -      -       -      +
    412A  TRP*     3.1    41.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 409 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     77A  MET*     3.5    28.0    -      -       +      -
     81A  PHE*     3.2    36.3    -      +       +      -
    405A  ALA      2.9    19.7    +      -       -      +
    406A  VAL*     3.5    15.3    -      -       +      +
    407A  ALA      3.0     0.6    -      -       -      -
    408A  GLY*     1.3    75.2    -      -       -      +
    410A  SER*     1.3    62.6    +      -       -      +
    412A  TRP*     3.8     3.2    +      -       -      -
    413A  THR*     2.3    55.8    +      -       +      -
----------------------------------------------------------
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Residues in contact with SER 410 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    276A  VAL*     3.4    29.9    -      -       -      +
    279A  GLN*     3.5    17.9    -      -       -      -
    280A  LEU*     4.0    12.6    -      -       -      +
    406A  VAL*     3.0    13.9    +      -       -      +
    407A  ALA      2.9     8.2    +      -       -      -
    409A  PHE*     1.3    79.2    -      -       -      +
    411A  ASN*     1.3    54.7    +      -       -      +
    413A  THR*     2.9     5.9    +      -       -      -
    414A  SER*     2.7    40.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 411 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    279A  GLN*     3.6    31.2    -      -       +      +
    282A  GLN*     2.6    29.6    +      -       -      +
    283A  GLN*     3.3    23.0    +      -       -      +
    388A  TRP*     3.9    13.5    -      -       +      +
    407A  ALA      3.0     6.0    +      -       -      +
    408A  GLY*     3.7    12.3    -      -       -      +
    410A  SER*     1.3    77.2    -      -       -      +
    412A  TRP*     1.3    63.5    +      -       +      +
    414A  SER*     3.9     5.2    -      -       -      -
    415A  ASN*     3.1    28.1    +      -       -      +
    601A  BNG      4.4     5.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with TRP 412 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     26A  PHE*     3.9    30.5    -      +       -      -
     72A  PHE*     4.2    19.3    -      +       -      -
     73A  SER*     3.1    44.1    -      -       -      +
     76A  GLY*     3.0    38.3    +      -       -      -
     77A  MET*     3.4    29.4    -      -       +      +
     80A  SER*     2.9    25.9    +      -       -      -
    130A  GLY      4.6     0.4    -      -       -      -
    133A  CYS      4.5     0.7    -      -       -      -
    134A  GLY*     3.6    17.3    -      -       -      -
    137A  THR*     4.2     5.1    +      -       +      +
    408A  GLY*     3.1    32.1    +      -       -      +
    409A  PHE      4.4     2.2    -      -       -      +
    411A  ASN*     1.3    77.6    -      -       +      +
    413A  THR*     1.3    61.7    +      -       -      +
    415A  ASN*     3.7     9.7    -      -       +      +
    416A  PHE*     3.3    16.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 413 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     77A  MET*     4.9     5.9    -      -       +      +
    280A  LEU*     6.0     0.9    -      -       -      -
    409A  PHE*     2.3    52.1    +      -       +      -
    410A  SER*     2.9     8.3    +      -       -      -
    412A  TRP*     1.3    76.4    -      -       -      +
    414A  SER*     1.3    64.6    +      -       -      +
    415A  ASN      3.0     4.3    -      -       -      -
    416A  PHE*     3.1    17.3    +      -       +      +
    417A  ILE*     3.1    27.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 414 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    279A  GLN      3.8     3.3    +      -       -      -
    280A  LEU*     3.6    26.1    -      -       -      +
    283A  GLN*     3.2    27.8    -      -       -      +
    284A  LEU*     3.8    17.2    -      -       -      +
    410A  SER      2.7    23.9    +      -       -      -
    413A  THR*     1.3    73.8    -      -       -      +
    415A  ASN*     1.3    59.7    +      -       -      +
    417A  ILE*     3.6    15.4    +      -       -      +
    418A  VAL*     3.3    26.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 415 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     30A  THR*     6.2     0.8    -      -       -      +
     73A  SER*     3.4    19.7    +      -       -      +
    283A  GLN*     2.3    30.9    +      -       -      +
    288A  ASN*     3.1    14.8    +      -       -      +
    292A  TYR*     2.7    28.0    +      -       -      -
    411A  ASN*     3.1    22.7    +      -       -      +
    412A  TRP*     3.7     8.7    -      -       -      +
    413A  THR      3.0     0.2    -      -       -      -
    414A  SER*     1.3    76.2    +      -       -      +
    416A  PHE*     1.3    65.9    +      -       -      +
    417A  ILE      3.1     0.5    +      -       -      -
    418A  VAL*     3.3     4.6    +      -       -      +
    419A  GLY*     2.9    21.5    +      -       -      -
    601A  BNG      3.9     6.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 416 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     67A  LEU*     5.0     7.0    -      -       +      -
     70A  ALA*     4.1    28.2    -      -       +      +
     71A  ILE*     4.7     1.6    -      -       -      -
     73A  SER*     4.1     8.9    -      -       -      -
     74A  VAL*     3.5    35.7    -      -       +      +
     77A  MET*     6.1     2.5    -      -       +      -
    412A  TRP      3.3    10.8    +      -       -      +
    413A  THR*     3.1    12.6    +      -       +      +
    415A  ASN*     1.3    77.5    -      -       -      +
    417A  ILE*     1.3    61.9    +      -       +      +
    419A  GLY*     4.7     0.7    -      -       -      +
    420A  MET*     2.7    68.4    +      -       +      +
    421A  CYS*     5.7     1.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 417 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    280A  LEU*     6.3     0.4    -      -       +      -
    284A  LEU*     4.6    18.2    -      -       +      -
    413A  THR*     3.1    28.3    -      -       +      +
    414A  SER*     3.7    17.9    -      -       -      +
    415A  ASN      3.1     0.8    -      -       -      -
    416A  PHE*     1.3    82.6    -      -       +      +
    418A  VAL*     1.3    60.3    +      -       -      +
    421A  CYS*     2.9    52.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 418 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    283A  GLN      3.2    27.1    -      -       -      +
    284A  LEU*     4.0    15.0    -      -       +      -
    286A  GLY*     4.5     8.3    -      -       -      -
    288A  ASN*     4.3    11.4    -      -       +      +
    289A  ALA*     3.8    35.2    -      -       +      +
    293A  TYR*     5.9     0.2    -      -       +      -
    414A  SER      3.3    12.7    +      -       -      +
    415A  ASN*     3.9     4.5    -      -       -      +
    417A  ILE*     1.3    78.3    -      -       -      +
    419A  GLY*     1.3    59.9    +      -       -      +
    422A  PHE*     2.8    41.0    +      -       +      +
    437A  PHE*     4.6    11.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 419 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     66A  SER*     4.1     7.8    +      -       -      +
     69A  VAL*     4.3     0.8    -      -       -      +
     70A  ALA*     4.2    11.2    -      -       -      -
    292A  TYR*     3.9    27.6    -      -       -      -
    293A  TYR*     3.2    23.1    +      -       -      -
    415A  ASN      2.9    15.4    +      -       -      -
    416A  PHE      3.9     0.4    -      -       -      -
    418A  VAL*     1.3    79.1    -      -       -      +
    420A  MET*     1.3    60.7    +      -       -      +
    422A  PHE      4.3     1.2    +      -       -      -
    423A  GLN      5.2     0.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with MET 420 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63A  THR*     3.9    26.2    -      -       -      +
     66A  SER*     3.4    29.0    +      -       -      -
     67A  LEU*     3.9    23.1    -      -       +      -
     70A  ALA*     3.8    12.4    -      -       +      +
    416A  PHE*     2.7    49.3    +      -       +      +
    419A  GLY*     1.3    74.1    -      -       -      +
    421A  CYS*     1.3    68.1    +      -       -      +
    422A  PHE      3.7     0.2    -      -       -      -
    423A  GLN      4.7     0.5    +      -       -      -
    424A  TYR*     4.8     5.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with CYS 421 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    416A  PHE*     5.7     1.8    -      -       -      -
    417A  ILE*     2.9    36.9    +      -       +      +
    420A  MET*     1.3    92.9    -      -       -      +
    422A  PHE*     1.3    63.4    +      -       -      +
    423A  GLN      3.2     2.7    -      -       -      -
    424A  TYR*     3.2    20.9    +      -       +      +
    425A  VAL*     3.2    31.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 422 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    289A  ALA*     3.6    22.9    -      -       +      -
    293A  TYR*     3.5    34.1    -      +       +      -
    297A  ILE*     3.5    31.9    -      -       +      -
    417A  ILE      4.1     0.2    +      -       -      -
    418A  VAL*     2.8    25.9    +      -       +      +
    419A  GLY      4.3     0.4    +      -       -      -
    420A  MET      3.7     0.6    -      -       -      -
    421A  CYS*     1.3    79.4    -      -       -      +
    423A  GLN*     1.3    61.0    -      -       +      +
    425A  VAL*     3.3     6.0    +      -       +      -
    426A  GLU*     3.0    48.2    +      -       +      +
    433A  VAL*     4.4    19.1    -      -       +      -
    434A  PHE*     4.7     6.5    -      +       -      -
    437A  PHE*     3.6    27.8    -      +       +      -
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


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

Legend:
+, legitimate
-, illegitimate
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  Atomic class           I  II  III   IV   V   VI  VII  VIII
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   I  (Hydrophilic)      +   +    +    -   +   +    +    +
  II  (Acceptor)         +   -    +    -   +   +    +    -
 III  (Donor)            +   +    -    -   +   +    -    +
  IV  (Hydrophobic)      -   -    -    +   +   +    +    +
   V  (Aromatic)         +   +    +    +   +   +    +    +
  VI  (Neutral)          +   +    +    +   +   +    +    +
 VII  (Neutral-donor)    +   +    -    +   +   +    -    +
VIII  (Neutral-acceptor) +   -    +    +   +   +    +    -
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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