Contacts of the helix formed by residues 653 - 684 (chain C) in PDB entry 5VEY


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 ASP 653 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    650C  GLY*     2.5    37.7    +      -       -      +
    651C  HIS      3.4     3.3    -      -       -      +
    652C  MET*     1.3    78.6    -      -       -      +
    654C  PRO*     1.3    68.0    -      -       -      +
    655C  VAL*     3.1    11.2    +      -       -      +
    656C  LEU*     3.5    41.5    +      -       +      +
    657C  ARG*     4.3     4.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with PRO 654 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    652C  MET*     3.2    24.2    -      -       +      +
    653C  ASP*     1.3    88.0    -      -       -      +
    655C  VAL*     1.3    71.3    +      -       +      +
    656C  LEU      3.2     0.2    -      -       -      -
    657C  ARG*     3.3    14.3    +      -       +      +
    658C  GLU*     3.0    38.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 655 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    653C  ASP*     3.1     4.4    -      -       -      -
    654C  PRO*     1.3    87.6    -      -       +      +
    656C  LEU*     1.3    53.6    +      -       +      +
    658C  GLU*     3.2    14.7    +      -       +      +
    659C  MET*     2.8    64.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 656 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    653C  ASP*     3.5    38.5    +      -       +      +
    654C  PRO      3.2     0.4    -      -       -      -
    655C  VAL*     1.3    77.7    -      -       +      +
    657C  ARG*     1.3    63.7    +      -       +      +
    659C  MET*     3.4    22.4    +      -       +      +
    660C  GLU*     3.1    36.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 657 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    652C  MET      5.6     3.2    +      -       -      -
    653C  ASP      4.9     5.4    -      -       -      +
    654C  PRO*     3.3    15.7    +      -       +      +
    656C  LEU*     1.3    77.6    -      -       +      +
    658C  GLU*     1.3    63.0    +      -       +      +
    660C  GLU*     3.4    15.5    +      -       -      +
    661C  GLN*     3.3    34.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 658 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    654C  PRO*     3.0    27.3    +      -       +      +
    655C  VAL*     3.6    15.2    -      -       +      +
    657C  ARG*     1.3    76.3    -      -       +      +
    659C  MET*     1.3    60.6    +      -       +      +
    661C  GLN*     3.4    10.2    +      -       -      +
    662C  LYS*     2.9    61.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with MET 659 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    655C  VAL*     2.8    47.0    +      -       +      +
    656C  LEU*     3.5    33.0    -      -       +      +
    657C  ARG      3.3     0.2    -      -       -      -
    658C  GLU*     1.3    75.8    -      -       +      +
    660C  GLU*     1.3    54.1    +      -       +      +
    662C  LYS*     3.9     7.4    -      -       +      +
    663C  LEU*     2.8    51.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 660 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    656C  LEU*     3.1    25.1    +      -       +      +
    657C  ARG*     3.7    16.0    +      -       -      +
    658C  GLU      3.3     0.2    -      -       -      -
    659C  MET*     1.3    77.6    -      -       +      +
    661C  GLN*     1.3    63.2    +      -       +      +
    663C  LEU*     3.7     9.8    -      -       +      +
    664C  GLN*     3.2    29.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 661 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    657C  ARG*     3.3    21.5    +      -       -      +
    658C  GLU*     3.8    10.9    -      -       -      +
    660C  GLU*     1.3    73.9    -      -       +      +
    662C  LYS*     1.3    67.4    +      -       +      +
    664C  GLN*     3.3     9.3    +      -       -      +
    665C  GLN*     3.3    30.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 662 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    658C  GLU*     2.9    48.2    +      -       -      +
    659C  MET*     3.9     7.0    -      -       +      +
    661C  GLN*     1.3    74.8    -      -       +      +
    663C  LEU*     1.3    56.1    +      -       +      +
    665C  GLN*     3.3    13.4    +      -       -      +
    666C  GLU*     2.7    37.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 663 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    659C  MET*     2.8    41.4    +      -       +      +
    660C  GLU*     3.7    10.5    -      -       +      +
    661C  GLN      3.3     0.2    -      -       -      -
    662C  LYS*     1.3    74.4    -      -       +      +
    664C  GLN*     1.3    60.9    +      -       +      +
    666C  GLU*     3.6    21.7    -      -       -      +
    667C  GLU*     2.8    45.9    +      -       -      +
    670C  ARG*     4.2    11.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 664 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    660C  GLU      3.2    16.8    +      -       -      +
    661C  GLN*     3.6    10.3    -      -       -      +
    662C  LYS      3.3     0.2    -      -       -      -
    663C  LEU*     1.3    79.5    -      -       -      +
    665C  GLN*     1.3    63.7    +      -       +      +
    667C  GLU*     4.0    17.1    +      -       -      +
    668C  GLU*     3.2    22.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 665 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    661C  GLN*     3.3    21.5    +      -       -      +
    662C  LYS*     3.3    12.9    +      -       -      +
    663C  LEU      3.3     0.2    -      -       -      -
    664C  GLN*     1.3    76.3    -      -       +      +
    666C  GLU*     1.3    66.2    +      -       -      +
    668C  GLU*     3.3    17.1    +      -       -      +
    669C  ASP*     3.2    28.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 666 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6B  LYS*     2.7    43.7    +      -       -      +
     66B  THR*     5.2     6.1    -      -       +      +
     68B  HIS*     3.4    27.6    +      -       +      +
    662C  LYS*     2.7    23.7    +      -       -      +
    663C  LEU*     3.6    18.9    -      -       -      +
    665C  GLN*     1.3    73.2    -      -       -      +
    667C  GLU*     1.3    57.4    +      -       -      +
    669C  ASP*     3.2     2.3    +      -       -      -
    670C  ARG*     2.9    47.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 667 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    663C  LEU*     2.8    29.7    +      -       -      +
    664C  GLN*     4.0    18.0    +      -       -      +
    666C  GLU*     1.3    73.4    -      -       -      +
    668C  GLU*     1.3    60.2    -      -       -      +
    670C  ARG*     3.2    31.9    +      -       -      +
    671C  GLN*     2.8    49.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 668 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46B  ALA      4.5    10.6    -      -       -      +
     47B  GLY*     5.0     2.0    -      -       -      -
    664C  GLN      3.2    14.1    +      -       -      +
    665C  GLN*     3.3    21.5    -      -       -      +
    666C  GLU      3.2     0.2    -      -       -      -
    667C  GLU*     1.3    77.4    -      -       -      +
    669C  ASP*     1.3    67.2    +      -       -      +
    671C  GLN*     3.8    12.3    +      -       -      +
    672C  LEU*     3.2    22.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 669 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     44B  ILE*     4.9     4.1    -      -       +      +
     46B  ALA*     2.9    20.7    +      -       -      +
     47B  GLY*     2.6    37.5    +      -       -      +
     66B  THR*     4.6     7.8    -      -       -      +
     68B  HIS*     3.4    34.9    +      -       +      +
    665C  GLN*     3.2    14.3    +      -       -      +
    666C  GLU*     3.7     4.2    -      -       -      +
    668C  GLU*     1.3    77.8    -      -       -      +
    670C  ARG*     1.3    56.0    +      -       -      +
    672C  LEU*     3.4     2.8    +      -       -      +
    673C  ALA*     2.8    36.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 670 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6B  LYS*     3.3    28.0    -      -       -      +
      7B  THR      5.4     3.1    -      -       -      -
      8B  LEU*     3.9    18.5    -      -       +      +
     10B  GLY*     5.8     2.0    -      -       -      -
     68B  HIS*     3.1    29.6    -      -       +      +
    663C  LEU*     4.2     9.5    -      -       -      +
    666C  GLU*     2.9    35.4    +      -       -      +
    667C  GLU*     3.2    36.3    +      -       -      +
    669C  ASP*     1.3    74.5    -      -       -      +
    671C  GLN*     1.3    56.4    +      -       +      +
    673C  ALA*     3.3     6.8    +      -       -      +
    674C  LEU*     2.7    35.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 671 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    667C  GLU*     2.8    39.2    +      -       +      +
    668C  GLU*     3.8    12.7    -      -       -      +
    670C  ARG*     1.3    71.5    -      -       +      +
    672C  LEU*     1.3    63.8    +      -       -      +
    674C  LEU*     3.3    12.0    +      -       +      +
    675C  GLN*     3.2    27.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 672 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     44B  ILE*     3.9     9.6    -      -       +      -
     47B  GLY*     3.2    32.8    -      -       -      +
     48B  LYS*     5.3     0.9    -      -       -      -
     49B  GLN      5.3     1.1    -      -       -      +
    668C  GLU*     3.2    15.1    +      -       +      +
    669C  ASP      3.8     3.6    -      -       -      +
    671C  GLN*     1.3    78.8    -      -       -      +
    673C  ALA*     1.3    64.1    +      -       -      +
    675C  GLN*     3.1    33.7    +      -       +      +
    676C  LEU*     3.2    37.2    +      -       +      +
    679C  MET*     6.1     0.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 673 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8B  LEU*     3.8    16.6    -      -       +      -
     44B  ILE*     3.8    10.8    -      -       +      -
     68B  HIS*     4.8     6.7    -      -       +      -
     70B  VAL*     3.3    39.0    -      -       +      +
    669C  ASP      2.8    19.5    +      -       -      +
    670C  ARG*     3.5     5.8    -      -       -      +
    672C  LEU*     1.3    77.2    -      -       -      +
    674C  LEU*     1.3    56.7    +      -       -      +
    676C  LEU*     3.2     2.6    +      -       -      +
    677C  GLN*     3.0    24.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 674 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8B  LEU*     4.5    12.8    -      -       +      +
    670C  ARG      2.7    21.9    +      -       -      +
    671C  GLN*     3.4    11.4    -      -       +      +
    673C  ALA*     1.3    73.3    -      -       -      +
    675C  GLN*     1.3    58.2    +      -       +      +
    677C  GLN*     3.2    12.4    +      -       +      +
    678C  ARG*     2.8    73.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 675 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    671C  GLN*     3.2    11.8    +      -       -      +
    672C  LEU*     3.1    35.9    +      -       +      +
    674C  LEU*     1.3    77.8    -      -       +      +
    676C  LEU*     1.3    57.6    +      -       -      +
    678C  ARG*     3.2    11.0    +      -       -      +
    679C  MET*     2.8    45.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 676 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     42B  ARG*     3.0    33.7    -      -       -      +
     44B  ILE*     3.5    32.3    -      -       +      -
     49B  GLN*     3.7    14.8    -      -       +      +
     70B  VAL*     4.1     8.1    -      -       +      -
    672C  LEU*     3.2    23.8    +      -       +      +
    673C  ALA      3.2     7.0    +      -       -      +
    675C  GLN*     1.3    76.2    -      -       -      +
    677C  GLN*     1.3    57.8    +      -       -      +
    679C  MET*     3.3    25.2    +      -       +      +
    680C  PHE*     2.9    37.9    +      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 677 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8B  LEU*     4.3    13.6    -      -       +      +
     70B  VAL*     3.3     5.8    -      -       +      +
     71B  LEU*     2.9    58.1    +      -       -      +
     73B  LEU*     4.0     9.1    -      -       -      +
    673C  ALA      3.0    13.2    +      -       -      +
    674C  LEU*     3.5    16.8    -      -       +      +
    676C  LEU*     1.3    77.9    -      -       -      +
    678C  ARG*     1.3    61.2    +      -       +      +
    680C  PHE*     3.6     2.7    +      -       -      +
    681C  ASP*     2.9    49.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 678 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    674C  LEU*     2.8    55.4    +      -       +      +
    675C  GLN*     3.2     9.8    +      -       -      +
    677C  GLN*     1.3    75.5    -      -       +      +
    679C  MET*     1.3    60.7    +      -       +      +
    681C  ASP*     3.3     8.1    +      -       -      +
    682C  ASN*     3.0    38.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 679 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    672C  LEU*     6.1     0.7    -      -       +      -
    675C  GLN*     2.8    34.1    +      -       +      +
    676C  LEU*     3.3    37.4    +      -       +      +
    678C  ARG*     1.3    70.7    -      -       +      +
    680C  PHE*     1.3    67.0    +      -       +      +
    682C  ASN*     3.1    22.9    +      -       -      +
    683C  GLU*     3.2    19.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 680 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     42B  ARG*     3.0    61.5    -      -       -      -
     70B  VAL*     5.1     0.4    -      -       +      -
     71B  LEU      3.7    14.8    -      -       -      +
     72B  ARG*     4.2    15.9    -      -       +      -
     73B  LEU*     3.5    55.1    -      -       +      +
     74B  ARG*     4.8    10.1    -      -       +      -
    676C  LEU*     2.9    29.2    +      -       +      +
    677C  GLN      3.8     2.9    -      -       -      +
    679C  MET*     1.3    77.6    -      -       +      +
    681C  ASP*     1.3    62.5    +      -       -      +
    683C  GLU*     3.3    25.1    +      -       +      +
    684C  ARG*     3.8     4.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 681 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     73B  LEU*     3.1    19.4    -      -       -      +
    677C  GLN*     2.9    31.6    +      -       -      +
    678C  ARG*     3.6    11.4    -      -       -      +
    679C  MET      3.2     0.2    -      -       -      -
    680C  PHE*     1.3    76.2    -      -       -      +
    682C  ASN*     1.3    66.3    +      -       -      +
    684C  ARG*     3.1    32.7    +      -       -      +
    686C  THR      3.7    14.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 682 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    678C  ARG*     3.0    29.5    +      -       -      +
    679C  MET*     3.1    17.1    +      -       -      +
    681C  ASP*     1.3    75.0    -      -       -      +
    683C  GLU*     1.3    59.0    +      -       +      +
    685C  ARG*     2.8    29.3    +      -       -      +
    686C  THR      5.2     2.0    -      -       -      -
    687C  VAL*     4.2    23.0    -      -       -      +
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Residues in contact with GLU 683 (chain C). Click here for Legend to table.
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                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
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     73B  LEU      5.3     5.4    -      -       -      +
    679C  MET      3.2    14.8    +      -       -      +
    680C  PHE*     3.3    20.2    -      -       +      +
    681C  ASP      3.2     0.2    -      -       -      -
    682C  ASN*     1.3    78.0    -      -       -      +
    684C  ARG*     1.3    63.0    +      -       +      +
    685C  ARG*     3.0    14.7    +      -       -      +
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Residues in contact with ARG 684 (chain C). Click here for Legend to table.
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                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
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    101A  ALA*     4.8    11.3    -      -       -      +
    102A  SER*     4.5    31.1    +      -       -      +
     73B  LEU*     3.7    32.7    -      -       +      +
     74B  ARG      5.3     1.4    -      -       -      +
    680C  PHE      3.9     7.4    -      -       -      +
    681C  ASP*     3.1    38.5    +      -       -      +
    682C  ASN      3.1     0.4    -      -       -      -
    683C  GLU*     1.3    75.4    -      -       +      +
    685C  ARG*     1.4    67.9    +      -       -      +
    686C  THR*     3.1    22.5    +      -       -      +
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


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

Legend:
+, legitimate
-, illegitimate
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  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) +   -    +    +   +   +    +    -
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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