Contacts of the helix formed by residues 587 - 615 (chain F) in PDB entry 6BAA


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 VAL 587 (chain F).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    470F  LEU*     4.9     8.1    -      -       +      +
    547F  ASN*     4.9    16.4    -      -       +      +
    550F  ILE*     5.9     4.3    -      -       +      -
    551F  PRO*     3.9    29.8    -      -       +      -
    583F  PHE      3.4    19.5    -      -       -      +
    584F  HIS*     4.6     7.9    -      -       -      +
    585F  ILE      3.0     2.2    +      -       -      -
    586F  LEU*     1.3    78.9    -      -       -      +
    588F  THR*     1.3    68.9    +      -       -      +
    590F  LEU*     3.2     9.3    +      -       -      +
    591F  PHE*     3.0    28.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 588 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    444F  GLN*     6.1     0.4    -      -       -      +
    584F  HIS      4.9     3.6    +      -       -      -
    585F  ILE      3.9     7.4    +      -       -      -
    587F  VAL*     1.3    76.7    -      -       -      +
    589F  PRO*     1.4    62.6    -      -       +      +
    591F  PHE*     4.7     3.6    -      -       -      +
    592F  LEU*     2.8    53.5    +      -       +      +
   1293F  ASN*     5.7     2.9    +      -       -      -
   1297F  TRP*     4.9    15.3    -      -       +      -
   2001F  GBM      3.7    20.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with PRO 589 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    441F  MET*     3.5    21.4    -      -       +      +
    444F  GLN*     3.5    25.8    -      -       +      +
    445F  ILE*     4.3    17.9    -      -       +      -
    585F  ILE*     3.4    17.3    -      -       +      +
    586F  LEU*     3.5    25.8    -      -       +      +
    587F  VAL      3.5     3.1    -      -       -      -
    588F  THR*     1.4    90.6    -      -       +      +
    590F  LEU*     1.3    60.5    -      -       +      +
    592F  LEU*     4.7     0.7    -      -       +      -
    593F  LEU*     2.8    31.7    +      -       -      +
   2001F  GBM      5.9     0.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 590 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    445F  ILE*     3.7    28.7    -      -       +      -
    467F  ILE*     3.6    38.4    -      -       +      +
    470F  LEU*     3.7    26.0    -      -       +      -
    471F  ALA*     4.6    14.7    -      -       +      +
    474F  GLN*     3.1    13.5    -      -       -      +
    586F  LEU*     3.2    24.2    -      -       +      +
    587F  VAL*     3.2     4.6    +      -       -      +
    589F  PRO*     1.3    76.2    -      -       +      +
    591F  PHE*     1.3    61.6    +      -       -      +
    593F  LEU*     3.0    22.6    +      -       +      +
    594F  SER*     3.1     9.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 591 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    474F  GLN*     3.5    21.8    -      -       +      +
    543F  SER*     6.1     0.7    -      -       -      -
    544F  ILE*     6.4     0.7    -      -       +      -
    547F  ASN*     3.2    41.3    -      -       -      +
    587F  VAL*     3.0    23.2    +      -       +      +
    588F  THR*     4.2     3.4    -      -       -      +
    590F  LEU*     1.3    76.6    -      -       -      +
    592F  LEU*     1.3    76.3    +      -       +      +
    594F  SER*     4.2     4.0    +      -       -      -
    595F  SER*     4.1     9.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 592 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    434F  LEU*     5.7     6.3    -      -       +      -
    437F  ASN*     4.5     8.7    -      -       -      +
    441F  MET*     5.1     0.4    -      -       -      -
    588F  THR*     2.8    40.0    +      -       +      +
    589F  PRO*     4.0     3.8    -      -       +      +
    591F  PHE*     1.3    96.9    -      -       +      +
    593F  LEU*     1.3    59.5    +      -       -      +
    595F  SER*     2.5    27.7    +      -       -      +
    596F  VAL*     3.0    15.9    +      -       +      +
   2001F  GBM      3.2    59.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 593 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    437F  ASN      4.9     1.6    -      -       -      +
    438F  LEU*     5.8     4.3    -      -       +      +
    441F  MET*     3.8    33.0    -      -       +      -
    442F  PRO*     5.7     1.3    -      -       +      -
    445F  ILE*     4.5    16.4    -      -       +      -
    471F  ALA*     5.6     7.2    -      -       +      -
    589F  PRO      2.8    18.4    +      -       -      +
    590F  LEU*     3.0    12.1    +      -       +      +
    592F  LEU*     1.3    76.6    -      -       -      +
    594F  SER*     1.3    60.1    +      -       -      +
    596F  VAL*     3.2    17.6    +      -       +      +
    597F  VAL*     2.9    42.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 594 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    471F  ALA*     3.4    14.0    +      -       -      +
    474F  GLN*     2.5    46.8    +      -       -      +
    475F  TYR*     4.4    15.9    -      -       -      +
    478F  ALA*     6.0     3.8    -      -       -      +
    590F  LEU      3.1     4.5    +      -       -      -
    591F  PHE      4.6     3.6    -      -       -      -
    592F  LEU      3.3     0.2    -      -       -      -
    593F  LEU*     1.3    76.9    -      -       -      +
    595F  SER*     1.3    61.9    +      -       -      +
    597F  VAL*     3.2     9.6    +      -       -      +
    598F  ARG*     3.1    22.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 595 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    434F  LEU*     4.2    11.8    -      -       -      +
    591F  PHE      4.1     5.6    +      -       -      -
    592F  LEU*     2.5    33.2    +      -       -      +
    594F  SER*     1.3    76.1    -      -       -      +
    596F  VAL*     1.3    55.0    +      -       -      +
    598F  ARG*     3.4    24.5    +      -       -      +
    599F  SER*     2.4    40.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 596 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    431F  PHE*     6.4     0.4    -      -       +      -
    434F  LEU*     3.7    43.3    -      -       +      +
    437F  ASN*     4.4    19.7    -      -       +      +
    438F  LEU*     5.0    14.4    -      -       +      +
    592F  LEU*     3.0    18.1    +      -       +      +
    593F  LEU*     3.2    21.7    +      -       +      +
    595F  SER*     1.3    83.2    +      -       -      +
    597F  VAL*     1.3    56.4    +      -       +      +
    599F  SER*     3.1     8.4    +      -       -      -
    600F  THR*     2.9    39.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 597 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    475F  TYR*     3.9    27.6    -      -       +      -
    593F  LEU*     2.9    33.3    +      -       +      +
    594F  SER*     3.5    10.1    -      -       -      +
    596F  VAL*     1.3    76.2    -      -       +      +
    598F  ARG*     1.3    61.6    +      -       -      +
    600F  THR*     2.6    22.5    +      -       -      +
    601F  VAL*     3.1    15.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 598 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    475F  TYR*     5.2     9.1    -      -       +      -
    478F  ALA*     3.4    42.6    +      -       +      +
    481F  LEU*     4.5    13.5    -      -       -      +
    482F  SER*     5.8     6.1    -      -       -      -
    594F  SER      3.1    15.2    +      -       -      +
    595F  SER*     3.8    20.6    +      -       -      +
    597F  VAL*     1.3    76.9    -      -       -      +
    599F  SER*     1.3    57.7    +      -       -      +
    601F  VAL*     3.3    10.2    +      -       +      +
    602F  LYS*     3.0    63.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 599 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    427F  GLN*     5.3     2.2    -      -       -      +
    430F  TRP*     5.9     2.3    -      -       -      +
    431F  PHE*     4.0    23.6    -      -       -      +
    434F  LEU*     4.1    15.1    -      -       -      +
    595F  SER*     2.4    24.5    +      -       -      -
    596F  VAL*     3.3    10.2    -      -       -      -
    598F  ARG*     1.3    78.1    +      -       -      +
    600F  THR*     1.3    57.3    +      -       -      +
    602F  LYS*     3.3    12.0    +      -       -      +
    603F  ALA*     2.8    26.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 600 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    431F  PHE*     3.4    26.0    -      -       +      -
    438F  LEU*     4.8    17.3    -      -       +      -
    596F  VAL*     2.9    26.0    +      -       +      +
    597F  VAL*     2.6    26.0    +      -       -      +
    599F  SER*     1.3    74.9    -      -       -      +
    601F  VAL*     1.3    63.7    +      -       -      +
    603F  ALA*     3.3     8.0    -      -       -      +
    604F  LEU*     3.0    31.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 601 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    475F  TYR*     5.2     9.4    -      -       +      +
    597F  VAL*     3.1    22.6    +      -       +      +
    598F  ARG*     3.5    10.8    -      -       +      +
    600F  THR*     1.3    77.0    +      -       -      +
    602F  LYS*     1.3    64.6    +      -       +      +
    604F  LEU*     3.2    10.2    +      -       -      +
    605F  VAL*     3.1    30.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 602 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    424F  ASP*     5.3     0.2    -      -       -      +
    427F  GLN*     3.3    41.0    +      -       +      +
    598F  ARG*     3.0    50.5    +      -       +      +
    599F  SER*     3.5    10.1    -      -       -      +
    601F  VAL*     1.3    77.6    -      -       +      +
    603F  ALA*     1.3    57.9    +      -       -      +
    605F  VAL*     3.3    10.4    +      -       -      +
    606F  SER*     2.8    31.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 603 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    288F  TRP*     5.6     1.0    +      -       +      -
    427F  GLN*     6.0     2.2    -      -       -      -
    428F  LEU*     5.4     6.1    -      -       +      +
    431F  PHE*     3.7    31.4    -      -       +      -
    599F  SER      2.8    14.8    +      -       -      +
    600F  THR*     3.3    15.3    -      -       -      +
    601F  VAL      3.2     0.2    -      -       -      -
    602F  LYS*     1.3    74.9    -      -       -      +
    604F  LEU*     1.3    72.2    +      -       +      +
    606F  SER*     3.1     7.2    +      -       -      +
    607F  VAL*     3.0    24.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 604 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    288F  TRP*     4.0    26.9    -      -       +      -
    600F  THR*     3.0    19.4    +      -       -      +
    601F  VAL*     3.6     8.7    -      -       +      +
    603F  ALA*     1.3    81.9    -      -       +      +
    605F  VAL*     1.3    59.6    +      -       +      +
    607F  VAL*     3.2     8.7    -      -       -      +
    608F  GLN*     2.9    42.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 605 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    424F  ASP*     5.0     6.5    -      -       -      +
    601F  VAL*     3.1    21.9    +      -       +      +
    602F  LYS*     3.4    11.4    -      -       +      +
    603F  ALA      3.1     0.6    -      -       -      -
    604F  LEU*     1.3    78.1    -      -       +      +
    606F  SER*     1.3    58.3    +      -       -      +
    608F  GLN*     3.2    14.2    +      -       -      +
    609F  LYS*     2.9    51.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 606 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    420F  LEU*     5.4     0.3    -      -       -      +
    424F  ASP*     3.0    53.5    +      -       -      +
    427F  GLN*     3.8     6.7    -      -       -      +
    428F  LEU*     4.3    19.9    -      -       -      +
    602F  LYS      2.8    17.4    +      -       -      -
    603F  ALA*     3.1     6.5    +      -       -      -
    605F  VAL*     1.3    76.6    -      -       -      +
    607F  VAL*     1.3    57.3    +      -       -      +
    609F  LYS*     3.3     1.7    +      -       -      +
    610F  LEU*     2.9    29.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 607 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    284F  ALA      5.5     5.2    -      -       -      +
    287F  ILE*     4.8    17.7    -      -       +      -
    288F  TRP*     3.4    55.2    -      -       +      +
    291F  LEU*     5.9     0.4    -      -       +      -
    428F  LEU*     5.5     4.6    -      -       +      +
    603F  ALA      3.0    15.7    +      -       -      +
    604F  LEU*     3.2    16.4    -      -       -      +
    606F  SER*     1.3    76.1    -      -       -      +
    608F  GLN*     1.3    59.6    +      -       +      +
    610F  LEU*     3.8     6.6    -      -       +      -
    611F  SER*     2.8    44.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 608 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    604F  LEU*     2.9    34.9    +      -       -      +
    605F  VAL*     3.5    15.0    -      -       +      +
    607F  VAL*     1.3    80.8    -      -       +      +
    609F  LYS*     1.3    61.9    +      -       +      +
    611F  SER*     3.4     6.5    +      -       -      -
    612F  GLU*     3.0    35.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 609 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    420F  LEU*     3.9    12.2    -      -       +      +
    424F  ASP*     3.8    21.8    -      -       -      +
    605F  VAL*     2.9    36.2    +      -       +      +
    606F  SER      4.0     1.3    -      -       -      +
    608F  GLN*     1.3    77.7    -      -       +      +
    610F  LEU*     1.3    60.8    +      -       -      +
    612F  GLU*     3.2    32.4    +      -       -      +
    613F  PHE*     2.9    27.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 610 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    287F  ILE*     4.7    25.8    -      -       +      -
    291F  LEU*     6.3     0.2    -      -       +      -
    391F  ILE*     4.6    23.1    -      -       +      -
    394F  LYS*     6.2     4.9    -      -       +      -
    395F  ILE*     4.2    27.4    -      -       +      -
    420F  LEU*     4.6     8.4    -      -       +      +
    428F  LEU*     5.6     6.5    -      -       +      -
    606F  SER      2.9    17.9    +      -       -      +
    607F  VAL*     4.0     6.7    -      -       +      +
    609F  LYS*     1.3    74.4    -      -       -      +
    611F  SER*     1.3    60.6    +      -       -      +
    613F  PHE*     4.6    11.7    -      -       +      -
    614F  LEU*     2.9    37.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 611 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    287F  ILE*     4.4    16.0    -      -       -      +
    607F  VAL*     2.8    33.2    +      -       -      +
    608F  GLN*     3.6     7.4    -      -       -      -
    610F  LEU*     1.3    76.6    -      -       -      +
    612F  GLU*     1.3    64.7    +      -       -      +
    614F  LEU*     4.0     1.1    -      -       -      +
    615F  SER*     3.2    21.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 612 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    608F  GLN*     3.0    22.6    +      -       -      +
    609F  LYS*     3.3    41.6    +      -       -      +
    610F  LEU      3.2     0.2    -      -       -      -
    611F  SER*     1.3    79.7    -      -       -      +
    613F  PHE*     1.3    62.6    +      -       -      +
    615F  SER*     3.3    19.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 613 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    395F  ILE*     3.8    25.1    -      -       +      -
    398F  LYS*     2.6    55.3    +      -       +      -
    399F  ILE*     3.8    25.1    -      -       +      -
    402F  MET*     5.4     9.9    -      -       +      -
    417F  ILE*     4.6    25.1    -      -       +      -
    420F  LEU*     3.9    23.8    -      -       +      -
    609F  LYS      2.9    16.0    +      -       -      +
    610F  LEU*     3.3    12.8    +      -       +      +
    612F  GLU*     1.3    77.2    -      -       -      +
    614F  LEU*     1.3    52.8    +      -       +      +
    615F  SER      2.9     4.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 614 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    270F  PHE*     6.3     2.5    -      -       +      -
    287F  ILE*     4.8    14.4    -      -       +      -
    394F  LYS*     6.0     8.5    -      -       +      -
    398F  LYS*     3.2    24.9    +      -       +      +
    610F  LEU*     2.9    26.7    +      -       +      +
    611F  SER      4.0     2.0    -      -       -      +
    613F  PHE*     1.3    75.7    -      -       +      +
    615F  SER*     1.3    62.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 615 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    398F  LYS*     2.5    26.8    +      -       -      -
    402F  MET*     5.6     0.2    -      -       -      +
    611F  SER      3.2    11.7    +      -       -      -
    612F  GLU*     3.3    16.8    -      -       -      +
    613F  PHE      2.9     6.1    -      -       -      +
    614F  LEU*     1.3    79.1    -      -       -      +
----------------------------------------------------------
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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