Contacts of the helix formed by residues 451 - 478 (chain F) in PDB entry 5G04


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 ALA 451 (chain F).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    452F  PHE*     1.3    68.2    +      -       -      +
    453F  ASN*     3.3     4.3    -      -       -      +
    454F  LEU*     3.4    13.1    +      -       -      +
    455F  GLN*     3.4    23.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 452 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    451F  ALA*     1.3    78.9    -      -       -      +
    453F  ASN*     1.3    62.2    +      -       -      +
    455F  GLN*     3.7     5.7    +      -       -      +
    456F  LYS*     3.2    25.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 453 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    451F  ALA      3.3     3.0    -      -       -      +
    452F  PHE*     1.3    76.0    -      -       -      +
    454F  LEU*     1.3    60.3    +      -       -      +
    456F  LYS*     3.6     5.8    +      -       -      +
    457F  ALA*     3.1    30.5    +      -       -      +
    460F  GLU*     5.1     0.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 454 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    451F  ALA*     3.4    14.1    +      -       -      +
    453F  ASN*     1.3    80.1    -      -       -      +
    455F  GLN*     1.3    61.7    +      -       -      +
    457F  ALA*     3.8    14.3    +      -       -      +
    458F  ALA*     4.1     6.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 455 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    451F  ALA*     3.4    14.3    +      -       -      +
    452F  PHE*     4.1     6.1    -      -       -      +
    454F  LEU*     1.3    77.8    -      -       -      +
    456F  LYS*     1.3    65.5    +      -       -      +
    457F  ALA      3.4     0.5    +      -       -      -
    458F  ALA*     3.8     8.3    +      -       -      +
    459F  ALA      3.9     1.4    +      -       -      -
      5H  GLN*     4.1    30.5    +      -       -      +
      7H  PRO*     3.6    42.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 456 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    170F  PHE      5.0    15.7    -      -       -      +
    452F  PHE      3.2    19.4    +      -       -      +
    453F  ASN*     3.8     6.7    -      -       -      +
    455F  GLN*     1.3    77.1    -      -       -      +
    457F  ALA*     1.3    57.0    +      -       -      +
    459F  ALA*     3.3     8.6    +      -       -      +
    460F  GLU*     2.9    48.1    +      -       +      +
    463F  MET*     5.6     2.0    -      -       -      +
      7H  PRO*     5.4     0.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 457 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    453F  ASN      3.1    18.6    +      -       -      +
    454F  LEU*     3.8     9.2    -      -       -      +
    455F  GLN      3.3     0.6    -      -       -      -
    456F  LYS*     1.3    74.6    -      -       -      +
    458F  ALA*     1.3    61.7    +      -       -      +
    460F  GLU*     3.3    30.9    +      -       -      +
    461F  GLY      3.9     2.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 458 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    454F  LEU      4.1     5.7    +      -       -      +
    455F  GLN      3.8     7.2    +      -       -      +
    456F  LYS      3.5     0.2    -      -       -      -
    457F  ALA*     1.3    77.6    -      -       -      +
    459F  ALA*     1.3    61.0    +      -       -      +
    460F  GLU      3.6     0.2    +      -       -      -
    461F  GLY*     3.8     9.4    +      -       -      -
    462F  LEU      4.7     1.0    +      -       -      -
      5H  GLN*     5.4    13.2    -      -       +      -
      6H  GLU      5.4     1.1    -      -       -      +
      7H  PRO*     5.3     5.8    -      -       +      -
     34H  GLU*     5.7     0.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 459 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    147F  PHE*     4.0    20.7    -      -       +      -
    455F  GLN      3.9     1.6    +      -       -      +
    456F  LYS*     3.3     9.5    +      -       -      +
    458F  ALA*     1.3    75.0    -      -       -      +
    460F  GLU*     1.3    58.0    +      -       -      +
    461F  GLY      3.1     2.9    -      -       -      -
    462F  LEU*     2.9    24.7    +      -       -      +
    463F  MET*     3.0    17.2    +      -       +      +
      7H  PRO*     3.5    34.2    -      -       +      +
      8H  VAL*     4.4     8.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 460 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    168F  PHE      5.6     1.8    -      -       -      +
    170F  PHE      5.7     2.8    -      -       -      -
    453F  ASN      5.1     0.3    -      -       -      +
    456F  LYS*     2.9    39.0    +      -       +      +
    457F  ALA*     3.3    20.8    +      -       -      +
    459F  ALA*     1.3    72.8    -      -       -      +
    461F  GLY*     1.3    59.4    +      -       -      +
    463F  MET*     3.6    20.5    -      -       +      +
    464F  SER*     2.8    35.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 461 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    457F  ALA      3.9     3.4    +      -       -      -
    458F  ALA      3.8     8.0    +      -       -      -
    459F  ALA      3.1     1.6    -      -       -      -
    460F  GLU*     1.3    79.6    -      -       -      +
    462F  LEU*     1.3    60.3    +      -       -      +
    464F  SER*     3.4    16.4    -      -       -      -
    465F  LEU*     3.5     7.4    +      -       -      +
     34H  GLU*     4.3     6.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 462 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    147F  PHE*     4.7     2.7    -      -       +      -
    458F  ALA      4.7     1.2    +      -       -      -
    459F  ALA*     2.9    13.1    +      -       -      +
    461F  GLY*     1.3    71.6    -      -       -      +
    463F  MET*     1.3    60.9    +      -       -      +
    465F  LEU*     3.1    32.5    +      -       +      +
    466F  LEU*     2.9    40.6    +      -       +      +
    495F  HIS*     4.4     3.6    -      -       +      -
      8H  VAL*     3.6    42.0    -      -       +      -
     27H  LEU*     4.1    14.6    -      -       +      +
     30H  ARG*     4.3    19.3    -      -       +      +
     31H  LEU*     5.0     2.5    -      -       +      +
     34H  GLU*     3.6    31.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with MET 463 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    145F  ASN      5.2     2.2    -      -       -      +
    146F  PRO*     5.5     1.6    -      -       +      -
    147F  PHE*     3.7    41.2    -      -       +      +
    167F  THR      3.1    23.6    -      -       -      +
    168F  PHE      3.2    23.6    -      -       -      +
    169F  LYS      3.8    13.7    -      -       -      +
    170F  PHE      3.8    24.2    -      -       -      +
    456F  LYS*     5.6     1.6    -      -       -      +
    459F  ALA*     3.0    17.4    +      -       +      +
    460F  GLU*     3.6    21.3    -      -       +      +
    462F  LEU*     1.3    76.2    -      -       -      +
    464F  SER*     1.3    62.1    +      -       -      +
    466F  LEU*     3.2    16.5    +      -       +      +
    467F  ARG*     3.0    26.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 464 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    460F  GLU*     2.8    16.2    +      -       -      +
    461F  GLY*     3.4    12.7    -      -       -      -
    462F  LEU      3.2     0.2    -      -       -      -
    463F  MET*     1.3    75.6    -      -       -      +
    465F  LEU*     1.3    62.5    +      -       -      +
    467F  ARG*     3.2    39.7    +      -       -      +
    468F  GLU*     3.2    23.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 465 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    461F  GLY      3.5     7.2    +      -       -      +
    462F  LEU*     3.1    27.3    +      -       +      +
    464F  SER*     1.3    76.2    -      -       -      +
    466F  LEU*     1.3    66.9    +      -       +      +
    468F  GLU*     3.4     9.3    +      -       -      +
    469F  MET*     3.0    38.6    +      -       +      +
    491F  LEU*     3.7    24.0    -      -       +      -
    492F  PRO*     4.0    14.1    -      -       +      -
    495F  HIS*     3.3    55.6    -      -       +      +
     30H  ARG*     4.9     4.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 466 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    147F  PHE*     4.9    25.6    -      -       +      +
    148F  LEU      6.4     0.2    -      -       -      -
    149F  TRP*     3.9    34.0    -      -       +      -
    167F  THR*     4.3    20.0    +      -       +      +
    462F  LEU*     2.9    40.2    +      -       +      +
    463F  MET*     3.2    18.4    +      -       +      +
    465F  LEU*     1.3    79.8    -      -       +      +
    467F  ARG*     1.3    52.7    +      -       -      +
    469F  MET*     3.2     8.8    +      -       -      +
    470F  GLY*     2.8    33.6    +      -       -      -
     26H  PHE*     4.2    16.6    -      -       +      -
     27H  LEU*     5.6     5.4    -      -       +      -
     30H  ARG*     5.8     3.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 467 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    164F  PRO*     3.8    25.4    -      -       +      +
    165F  ASP*     4.6     4.5    -      -       -      +
    167F  THR*     4.0    11.6    +      -       -      +
    168F  PHE*     3.3    42.4    +      -       +      +
    463F  MET*     3.0     7.9    +      -       -      +
    464F  SER*     3.2    39.7    +      -       -      +
    466F  LEU*     1.3    74.5    -      -       -      +
    468F  GLU*     1.3    80.6    +      -       -      +
    470F  GLY*     3.2     1.6    +      -       -      -
    471F  LYS*     3.1    30.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 468 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    464F  SER*     3.2    21.6    +      -       -      +
    465F  LEU*     3.7     8.7    -      -       +      +
    466F  LEU      3.3     0.2    -      -       -      -
    467F  ARG*     1.3    94.9    +      -       -      +
    469F  MET*     1.3    61.7    +      -       -      +
    471F  LYS*     3.4    37.7    +      -       -      +
    487F  ILE*     3.5    18.4    -      -       +      +
    490F  HIS*     6.3     2.5    -      -       +      -
    491F  LEU*     4.4    16.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with MET 469 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    149F  TRP*     4.4     4.0    -      -       +      -
    465F  LEU*     3.0    36.3    +      -       +      +
    466F  LEU*     3.4    12.3    -      -       -      +
    468F  GLU*     1.3    73.9    -      -       -      +
    470F  GLY*     1.3    60.2    +      -       -      +
    472F  GLY*     3.1     5.2    +      -       -      -
    473F  TYR*     3.0    26.2    +      -       -      +
    488F  LEU*     4.6     8.3    -      -       +      +
    491F  LEU*     3.7    36.3    -      -       +      +
    495F  HIS*     4.5     0.4    -      -       +      -
    500F  TRP*     3.5    31.8    -      -       +      -
    501F  VAL*     4.0     9.9    -      -       +      -
     26H  PHE*     3.6    21.5    -      -       -      -
     30H  ARG*     3.8    23.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 470 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    149F  TRP*     3.5    21.1    -      -       -      -
    152F  PHE*     3.8    17.9    -      -       -      -
    164F  PRO*     5.0     2.2    -      -       -      -
    167F  THR*     5.2     2.2    -      -       -      -
    466F  LEU      2.8    20.8    +      -       -      -
    467F  ARG      3.2     2.4    +      -       -      -
    469F  MET*     1.3    71.6    -      -       -      +
    471F  LYS*     1.3    62.7    +      -       -      +
    473F  TYR*     3.3     0.5    +      -       -      -
    474F  LEU*     3.0    25.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 471 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    164F  PRO*     3.3    34.9    -      -       +      +
    467F  ARG*     3.1    24.0    +      -       -      +
    468F  GLU*     3.4    30.0    +      -       -      +
    470F  GLY*     1.3    74.0    -      -       -      +
    472F  GLY*     1.3    58.2    +      -       -      +
    474F  LEU*     3.4    10.1    +      -       +      +
    475F  ALA*     3.0    29.6    +      -       -      +
    487F  ILE*     3.9    20.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 472 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    468F  GLU      3.6     2.8    +      -       -      -
    469F  MET      3.1     7.6    +      -       -      -
    471F  LYS*     1.3    77.6    -      -       -      +
    473F  TYR*     1.3    57.4    +      -       -      +
    475F  ALA*     3.2     6.2    +      -       -      +
    476F  LEU*     2.8    31.2    +      -       -      +
    484F  ALA*     3.7    13.1    -      -       -      +
    487F  ILE*     3.6    20.3    -      -       -      +
    488F  LEU*     4.7    11.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 473 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    149F  TRP*     3.8    22.9    -      +       +      -
    152F  PHE*     4.9     0.7    -      -       +      -
    153F  GLU*     3.7    33.5    +      -       +      +
    156F  CYS*     3.8    25.6    -      -       -      -
    157F  GLU*     3.5    18.6    +      -       +      -
    469F  MET      3.0    10.7    +      -       -      +
    470F  GLY      3.9     4.5    -      -       -      +
    472F  GLY*     1.3    75.2    -      -       -      +
    474F  LEU*     1.3    57.9    +      -       -      +
    476F  LEU*     3.1    12.1    +      -       +      +
    477F  CYS*     2.9    42.7    +      -       +      +
    488F  LEU*     5.4     2.1    -      -       +      +
    500F  TRP*     3.6    27.1    -      +       +      -
    504F  GLN*     3.6    26.2    -      -       +      -
     22H  ARG*     6.0     0.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 474 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    152F  PHE*     4.5     8.9    -      -       +      -
    156F  CYS*     4.3    15.5    -      -       +      +
    161F  LYS*     3.7    39.7    -      -       +      -
    162F  PRO*     3.5    28.3    -      -       +      +
    163F  ASP*     5.1     0.2    -      -       -      -
    164F  PRO*     4.0    22.2    -      -       +      -
    470F  GLY      3.0    14.5    +      -       -      +
    471F  LYS*     3.6     9.4    -      -       +      +
    473F  TYR*     1.3    76.0    -      -       -      +
    475F  ALA*     1.3    59.6    +      -       +      +
    477F  CYS*     3.4     2.6    +      -       -      +
    478F  SER*     3.0    30.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 475 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    471F  LYS      3.0    17.7    +      -       -      +
    472F  GLY*     3.5     6.3    -      -       -      +
    474F  LEU*     1.3    77.1    -      -       -      +
    476F  LEU*     1.3    63.1    +      -       -      +
    478F  SER*     3.2     9.2    +      -       -      -
    479F  TYR      3.1     5.4    +      -       -      -
    480F  ASN*     2.9    44.1    +      -       +      +
    483F  GLU*     4.9     9.0    -      -       +      +
    484F  ALA*     4.1    11.7    -      -       +      +
    487F  ILE*     6.2     1.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 476 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    472F  GLY      2.8    13.9    +      -       -      +
    473F  TYR*     3.4    17.9    -      -       +      +
    475F  ALA*     1.3    76.1    -      -       -      +
    477F  CYS*     1.3    60.5    +      -       +      +
    479F  TYR*     2.9    26.9    +      -       -      -
    480F  ASN      4.8     2.5    -      -       -      +
    481F  CYS*     5.0     4.6    -      -       -      +
    484F  ALA*     3.9    10.5    -      -       +      +
    488F  LEU*     4.9     6.5    -      -       +      -
    504F  GLN*     3.3    50.7    -      -       +      +
    507F  ARG*     3.8    31.6    -      -       -      +
    508F  ALA*     3.8    28.0    -      -       +      +
    511F  GLU*     5.3     3.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with CYS 477 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    156F  CYS*     4.4    11.0    -      -       -      +
    157F  GLU*     3.5    45.3    -      -       -      -
    473F  TYR*     2.9    30.4    +      -       +      +
    474F  LEU*     3.8     5.6    -      -       -      +
    476F  LEU*     1.3    81.0    -      -       -      +
    478F  SER*     1.3    58.8    +      -       -      +
    479F  TYR*     3.1    24.7    +      -       -      -
    507F  ARG*     5.6     8.3    -      -       -      +
    633F  ARG*     3.6    14.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 478 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    161F  LYS*     3.6    32.0    +      -       -      +
    474F  LEU*     3.0    18.3    +      -       -      -
    475F  ALA*     3.4    10.7    +      -       -      -
    477F  CYS*     1.3    74.0    -      -       -      +
    479F  TYR*     1.3    68.7    +      -       -      +
    480F  ASN*     4.5     8.7    +      -       -      +
    633F  ARG*     4.2    12.2    +      -       -      +
    664F  ILE      4.0     6.2    -      -       -      +
    666F  PRO*     4.3     8.5    -      -       -      +
----------------------------------------------------------
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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
------------------------------------------------------------
  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