Contacts of the helix formed by residues 587 - 615 (chain H) 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 H).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    470H  LEU*     4.9     8.4    -      -       +      +
    547H  ASN*     4.9    16.4    -      -       +      +
    550H  ILE*     5.9     5.2    -      -       +      -
    551H  PRO*     3.9    30.3    -      -       +      -
    583H  PHE      3.4    18.6    -      -       -      +
    584H  HIS*     4.6     7.9    -      -       -      +
    585H  ILE      3.0     1.8    +      -       -      -
    586H  LEU*     1.3    79.6    -      -       -      +
    588H  THR*     1.3    67.4    +      -       -      +
    589H  PRO      3.4     0.2    -      -       -      -
    590H  LEU*     3.2     8.7    +      -       -      +
    591H  PHE*     3.0    29.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 588 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    444H  GLN*     6.1     0.4    -      -       -      +
    584H  HIS      4.9     3.6    +      -       -      -
    585H  ILE      3.9     7.9    +      -       -      -
    587H  VAL*     1.3    78.0    -      -       -      +
    589H  PRO*     1.4    66.3    -      -       +      +
    591H  PHE*     4.7     3.1    -      -       -      -
    592H  LEU*     2.8    49.3    +      -       +      +
   1293H  ASN*     5.7     3.1    +      -       -      -
   1297H  TRP*     4.9    15.2    -      -       +      -
   2001H  GBM      3.7    20.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with PRO 589 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    441H  MET*     3.5    22.3    -      -       +      +
    444H  GLN*     3.5    26.0    -      -       +      +
    445H  ILE*     4.3    17.7    -      -       +      -
    585H  ILE*     3.4    17.5    -      -       +      +
    586H  LEU*     3.5    26.5    -      -       +      +
    587H  VAL      3.5     3.1    -      -       -      -
    588H  THR*     1.4    88.9    -      -       +      +
    590H  LEU*     1.3    62.2    +      -       +      +
    592H  LEU*     3.7     0.8    -      -       +      -
    593H  LEU*     2.8    32.2    +      -       -      +
   2001H  GBM      5.9     0.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 590 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    445H  ILE*     3.7    28.5    -      -       +      -
    467H  ILE*     3.6    38.1    -      -       +      +
    470H  LEU*     3.7    25.8    -      -       +      -
    471H  ALA*     4.6    14.6    -      -       +      +
    474H  GLN*     3.1    12.6    -      -       -      +
    586H  LEU*     3.2    25.4    -      -       +      +
    587H  VAL      3.2     4.2    +      -       -      +
    589H  PRO*     1.3    78.5    -      -       +      +
    591H  PHE*     1.3    62.4    +      -       -      +
    593H  LEU*     3.0    23.0    +      -       +      +
    594H  SER*     3.1     8.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 591 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    474H  GLN*     3.5    21.9    -      -       +      +
    543H  SER*     6.1     0.9    -      -       -      -
    544H  ILE*     6.4     0.9    -      -       +      -
    547H  ASN*     3.2    40.8    -      -       -      +
    587H  VAL*     3.0    23.6    +      -       +      +
    588H  THR*     4.2     3.1    -      -       -      +
    590H  LEU*     1.3    77.2    -      -       -      +
    592H  LEU*     1.3    76.3    +      -       +      +
    594H  SER*     4.2     3.8    +      -       -      -
    595H  SER*     4.1    10.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 592 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    434H  LEU*     5.7     5.6    -      -       +      -
    437H  ASN*     4.5     9.0    -      -       -      +
    441H  MET*     5.1     0.7    -      -       -      -
    588H  THR*     2.8    40.6    +      -       +      +
    589H  PRO*     4.0     3.4    -      -       +      +
    591H  PHE*     1.3    95.8    -      -       +      +
    593H  LEU*     1.3    58.8    +      -       -      +
    594H  SER      3.3     0.4    -      -       -      -
    595H  SER*     2.5    27.4    +      -       -      +
    596H  VAL*     3.0    16.1    +      -       +      +
   2001H  GBM      3.2    59.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 593 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    437H  ASN      4.9     1.6    -      -       -      +
    438H  LEU*     5.8     3.6    -      -       +      +
    441H  MET*     3.8    32.5    -      -       +      -
    442H  PRO*     5.7     1.8    -      -       +      -
    445H  ILE*     4.5    15.7    -      -       +      -
    471H  ALA*     5.6     7.4    -      -       +      -
    589H  PRO      2.8    19.5    +      -       -      +
    590H  LEU*     3.0    12.3    +      -       +      +
    592H  LEU*     1.3    76.5    -      -       -      +
    594H  SER*     1.3    59.2    +      -       -      +
    596H  VAL*     3.4    17.7    -      -       +      +
    597H  VAL*     2.9    41.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 594 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    471H  ALA*     3.4    14.0    +      -       -      +
    474H  GLN*     2.5    47.4    +      -       -      +
    475H  TYR*     4.4    15.7    -      -       -      +
    478H  ALA*     6.0     4.1    -      -       -      +
    590H  LEU      3.1     5.6    +      -       -      -
    591H  PHE      4.6     3.1    -      -       -      -
    592H  LEU      3.3     0.2    -      -       -      -
    593H  LEU*     1.3    77.8    -      -       -      +
    595H  SER*     1.3    61.8    +      -       -      +
    597H  VAL*     3.2     9.3    +      -       -      +
    598H  ARG*     3.1    22.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 595 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    434H  LEU*     4.2    12.3    -      -       -      +
    591H  PHE      4.1     5.4    +      -       -      -
    592H  LEU*     2.5    34.3    +      -       -      +
    594H  SER*     1.3    74.7    -      -       -      +
    596H  VAL*     1.3    54.4    +      -       -      +
    598H  ARG*     3.4    23.5    +      -       -      +
    599H  SER*     2.4    40.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 596 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    434H  LEU*     3.7    42.6    -      -       +      +
    437H  ASN*     4.4    20.2    -      -       +      +
    438H  LEU*     5.0    15.0    -      -       +      +
    592H  LEU*     3.0    17.6    +      -       +      +
    593H  LEU*     3.2    23.7    +      -       +      +
    595H  SER*     1.3    82.2    +      -       -      +
    597H  VAL*     1.3    58.4    +      -       +      +
    599H  SER*     3.1     7.4    +      -       -      -
    600H  THR*     2.9    39.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 597 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    475H  TYR*     3.9    26.5    -      -       +      -
    593H  LEU*     2.9    32.5    +      -       +      +
    594H  SER*     3.2    10.5    +      -       -      +
    596H  VAL*     1.3    77.7    -      -       +      +
    598H  ARG*     1.3    63.0    +      -       -      +
    600H  THR*     2.6    23.1    +      -       -      +
    601H  VAL*     3.1    16.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 598 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    475H  TYR*     5.2     8.7    -      -       +      -
    478H  ALA*     3.4    42.6    +      -       +      +
    481H  LEU*     4.5    13.3    -      -       -      +
    482H  SER*     5.8     6.1    -      -       -      -
    594H  SER      3.1    16.0    +      -       -      +
    595H  SER*     3.8    20.4    +      -       -      +
    597H  VAL*     1.3    77.1    -      -       -      +
    599H  SER*     1.3    57.4    +      -       -      +
    601H  VAL*     3.3     9.9    +      -       +      +
    602H  LYS*     3.0    63.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 599 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    427H  GLN*     5.3     2.2    -      -       -      +
    430H  TRP*     5.9     2.3    -      -       -      +
    431H  PHE*     4.0    24.0    -      -       -      +
    434H  LEU*     4.1    15.4    -      -       -      +
    595H  SER*     2.4    25.5    +      -       -      -
    596H  VAL*     3.1     9.7    +      -       -      -
    598H  ARG*     1.3    77.9    +      -       -      +
    600H  THR*     1.3    57.7    +      -       -      +
    602H  LYS*     3.3    12.5    +      -       -      +
    603H  ALA*     2.8    26.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 600 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    431H  PHE*     3.4    25.6    -      -       +      -
    438H  LEU*     4.8    17.7    -      -       +      -
    596H  VAL*     2.9    25.2    +      -       +      +
    597H  VAL*     2.6    26.3    +      -       -      +
    599H  SER*     1.3    74.0    -      -       -      +
    601H  VAL*     1.3    63.8    +      -       -      +
    603H  ALA*     3.3     7.6    -      -       -      +
    604H  LEU*     3.0    31.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 601 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    475H  TYR*     5.2    10.1    -      -       +      +
    597H  VAL*     3.1    23.1    +      -       +      +
    598H  ARG*     3.3    11.6    +      -       +      +
    600H  THR*     1.3    76.8    +      -       -      +
    602H  LYS*     1.3    63.9    +      -       +      +
    604H  LEU*     3.2     9.9    +      -       -      +
    605H  VAL*     3.1    30.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 602 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    424H  ASP*     5.3     0.5    -      -       -      +
    427H  GLN*     3.3    41.2    +      -       +      +
    598H  ARG*     3.0    50.4    +      -       +      +
    599H  SER*     3.6     9.6    -      -       -      +
    601H  VAL*     1.3    78.8    -      -       +      +
    603H  ALA*     1.3    56.6    +      -       -      +
    605H  VAL*     3.3    11.2    +      -       +      +
    606H  SER*     2.8    31.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 603 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    288H  TRP*     5.6     0.6    +      -       -      -
    427H  GLN*     6.0     2.5    -      -       -      -
    428H  LEU*     5.4     6.1    -      -       +      +
    431H  PHE*     3.7    29.6    -      -       +      -
    599H  SER      2.8    14.6    +      -       -      +
    600H  THR*     3.3    14.8    -      -       -      +
    601H  VAL      3.2     0.2    -      -       -      -
    602H  LYS*     1.3    74.0    -      -       -      +
    604H  LEU*     1.3    72.4    +      -       +      +
    606H  SER*     3.1     7.8    +      -       -      +
    607H  VAL*     3.0    25.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 604 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    288H  TRP*     4.0    27.4    -      -       +      -
    600H  THR*     3.0    19.4    +      -       -      +
    601H  VAL*     3.6     9.6    -      -       -      +
    603H  ALA*     1.3    81.3    -      -       +      +
    605H  VAL*     1.3    57.9    +      -       +      +
    607H  VAL*     3.2     8.0    -      -       -      +
    608H  GLN*     2.9    43.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 605 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    424H  ASP*     5.0     7.4    -      -       -      +
    601H  VAL*     3.1    22.8    +      -       +      +
    602H  LYS*     3.4    11.0    -      -       -      +
    603H  ALA      3.1     0.4    -      -       -      -
    604H  LEU*     1.3    78.0    -      -       +      +
    606H  SER*     1.3    58.9    +      -       -      +
    608H  GLN*     3.2    14.8    +      -       -      +
    609H  LYS*     2.9    51.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 606 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    420H  LEU*     5.4     0.2    -      -       -      +
    424H  ASP*     3.0    54.3    +      -       -      +
    427H  GLN*     3.8     6.6    -      -       -      +
    428H  LEU*     4.3    18.4    -      -       -      -
    602H  LYS      2.8    16.7    +      -       -      -
    603H  ALA*     3.1     6.7    +      -       -      -
    605H  VAL*     1.3    76.2    -      -       -      +
    607H  VAL*     1.3    57.1    +      -       -      +
    609H  LYS*     3.3     1.7    +      -       -      +
    610H  LEU*     2.9    30.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 607 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    284H  ALA      5.5     4.7    -      -       -      +
    287H  ILE*     4.8    18.2    -      -       +      -
    288H  TRP*     3.4    55.0    -      -       +      +
    291H  LEU*     5.9     0.9    -      -       +      -
    428H  LEU*     5.5     4.2    -      -       +      +
    603H  ALA      3.0    14.1    +      -       -      +
    604H  LEU*     3.2    16.8    -      -       -      +
    606H  SER*     1.3    77.8    -      -       -      +
    608H  GLN*     1.3    60.2    +      -       +      +
    610H  LEU*     3.8     6.7    -      -       +      +
    611H  SER*     2.8    44.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 608 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    604H  LEU*     2.9    34.7    +      -       -      +
    605H  VAL*     3.2    15.5    +      -       +      +
    607H  VAL*     1.3    80.9    -      -       +      +
    609H  LYS*     1.3    61.1    +      -       +      +
    611H  SER*     3.4     6.6    +      -       -      -
    612H  GLU*     3.0    34.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 609 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    420H  LEU*     3.9    12.2    -      -       +      +
    424H  ASP*     3.8    21.8    -      -       -      +
    605H  VAL*     2.9    36.0    +      -       +      +
    606H  SER      4.0     1.3    -      -       -      +
    608H  GLN*     1.3    77.1    -      -       -      +
    610H  LEU*     1.3    60.8    +      -       -      +
    612H  GLU*     3.2    34.0    +      -       -      +
    613H  PHE*     2.9    27.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 610 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    287H  ILE*     4.7    25.8    -      -       +      -
    291H  LEU*     6.3     0.9    -      -       +      -
    391H  ILE*     4.6    23.6    -      -       +      -
    394H  LYS*     6.2     4.7    -      -       +      -
    395H  ILE*     4.2    27.8    -      -       +      -
    420H  LEU*     4.6     8.2    -      -       +      +
    428H  LEU*     5.6     6.1    -      -       +      -
    606H  SER      2.9    17.7    +      -       -      +
    607H  VAL*     4.0     7.2    -      -       +      +
    609H  LYS*     1.3    74.2    -      -       -      +
    611H  SER*     1.3    60.2    +      -       -      +
    613H  PHE*     4.3    11.7    -      -       +      +
    614H  LEU*     2.9    37.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 611 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    287H  ILE*     4.4    16.8    -      -       -      +
    607H  VAL*     2.8    33.5    +      -       -      +
    608H  GLN*     3.6     7.1    -      -       -      -
    610H  LEU*     1.3    76.2    -      -       -      +
    612H  GLU*     1.3    65.6    +      -       -      +
    614H  LEU*     4.0     1.1    -      -       -      -
    615H  SER*     3.2    21.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 612 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    608H  GLN*     3.0    21.6    +      -       -      +
    609H  LYS*     3.3    41.6    +      -       -      +
    610H  LEU      3.2     0.2    -      -       -      -
    611H  SER*     1.3    79.3    -      -       -      +
    613H  PHE*     1.3    62.6    +      -       -      +
    615H  SER*     3.3    19.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 613 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    395H  ILE*     3.8    26.2    -      -       +      -
    398H  LYS*     2.6    55.3    +      -       +      -
    399H  ILE*     3.8    25.6    -      -       +      -
    402H  MET*     5.4     9.6    -      -       +      -
    417H  ILE*     4.6    24.5    -      -       +      -
    420H  LEU*     3.9    26.5    -      -       +      -
    609H  LYS      2.9    15.6    +      -       -      +
    610H  LEU*     3.3    12.1    +      -       +      +
    612H  GLU*     1.3    77.4    -      -       -      +
    614H  LEU*     1.3    53.1    +      -       +      +
    615H  SER      2.9     4.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 614 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    270H  PHE*     6.3     2.5    -      -       +      -
    287H  ILE*     4.8    13.7    -      -       +      -
    394H  LYS*     6.0     8.7    -      -       +      -
    398H  LYS*     3.2    24.6    +      -       +      +
    610H  LEU*     2.9    27.0    +      -       +      +
    611H  SER      4.0     2.0    -      -       -      +
    613H  PHE*     1.3    75.0    -      -       +      +
    615H  SER*     1.3    60.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 615 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    398H  LYS*     2.5    25.8    +      -       -      -
    402H  MET*     5.6     0.5    -      -       -      +
    611H  SER      3.2    12.5    +      -       -      -
    612H  GLU*     3.3    17.7    -      -       -      +
    613H  PHE      2.9     6.9    -      -       -      +
    614H  LEU*     1.3    79.2    -      -       -      +
----------------------------------------------------------
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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