Contacts of the helix formed by residues 287 - 314 (chain F) in PDB entry 6C3P


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 ILE 287 (chain F).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    286F  ALA*     1.3    78.0    -      -       +      +
    288F  TRP*     1.3    69.4    +      -       +      +
    289F  GLN      3.1     2.7    -      -       -      -
    290F  ALA*     3.1    11.1    +      -       +      +
    291F  LEU*     2.9    27.8    +      -       +      +
    394F  LYS*     6.3     1.6    -      -       -      +
    607F  VAL*     3.6    30.1    -      -       +      -
    610F  LEU*     4.5    19.7    -      -       +      -
    611F  SER*     4.7    20.4    -      -       -      +
    614F  LEU*     5.7    12.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with TRP 288 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    286F  ALA*     4.9    11.4    -      -       +      +
    287F  ILE*     1.3    79.1    -      -       +      +
    289F  GLN*     1.3    60.2    +      -       +      +
    291F  LEU*     3.6    15.7    -      -       +      +
    292F  SER*     2.9    32.8    +      -       -      -
    432F  PHE*     6.6     0.2    -      +       -      -
    603F  ALA      5.4     0.2    -      -       -      -
    604F  LEU*     3.5    47.3    -      -       +      -
    607F  VAL*     3.2    41.2    -      -       +      +
    608F  GLN      5.9     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 289 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    272F  ALA*     5.4     3.8    -      -       +      -
    286F  ALA      3.6    31.6    +      -       -      +
    287F  ILE      3.1     0.4    -      -       -      -
    288F  TRP*     1.3    78.4    -      -       +      +
    290F  ALA*     1.3    57.4    +      -       -      +
    292F  SER*     2.6    22.3    +      -       -      -
    293F  HIS*     2.9    17.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 290 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    268F  GLU*     4.5     2.7    -      -       -      +
    269F  ALA*     4.5    18.4    -      -       +      +
    272F  ALA*     4.3    21.6    -      -       +      +
    286F  ALA      4.1     1.7    +      -       -      +
    287F  ILE*     3.1    14.9    +      -       +      +
    289F  GLN*     1.3    75.8    -      -       -      +
    291F  LEU*     1.3    67.0    +      -       -      +
    293F  HIS*     3.3     7.0    +      -       -      +
    294F  ALA*     2.9    26.1    +      -       -      +
    394F  LYS*     6.0     4.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 291 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    287F  ILE*     2.9    16.1    +      -       +      +
    288F  TRP*     3.6    19.7    -      -       +      +
    290F  ALA*     1.3    76.0    -      -       -      +
    292F  SER*     1.3    67.7    +      -       -      +
    294F  ALA*     3.0     6.4    +      -       -      +
    295F  PHE*     2.9    48.9    +      -       +      +
    299F  LEU*     5.2     2.7    -      -       +      -
    387F  LEU*     3.7    39.9    -      -       +      -
    391F  ILE*     5.8     1.6    -      -       +      -
    428F  LEU*     6.4     1.1    -      -       +      -
    432F  PHE*     4.1    22.9    -      -       +      -
    607F  VAL*     6.6     0.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 292 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    288F  TRP      2.9    17.3    +      -       -      -
    289F  GLN*     2.6    26.2    +      -       -      -
    291F  LEU*     1.3    79.5    -      -       -      +
    293F  HIS*     1.3    63.1    +      -       -      +
    295F  PHE      2.9     0.2    +      -       -      -
    296F  GLY*     2.9    31.7    +      -       -      +
    299F  LEU*     6.4     0.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with HIS 293 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    268F  GLU*     4.1    17.2    +      -       +      +
    271F  ASP*     3.7    28.0    -      -       +      +
    272F  ALA*     4.3    10.8    +      -       +      +
    275F  ARG*     6.4     1.1    -      -       +      -
    289F  GLN      2.9    16.0    +      -       -      +
    290F  ALA*     3.7     7.2    -      -       -      +
    292F  SER*     1.3    79.8    +      -       -      +
    294F  ALA*     1.3    59.4    +      -       -      +
    295F  PHE      3.7     0.2    +      -       -      -
    297F  ARG*     5.6     3.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 294 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    264F  GLN*     4.8     9.2    -      -       +      +
    265F  ARG*     4.8     9.4    -      -       +      +
    268F  GLU*     3.4    25.1    -      -       +      +
    290F  ALA      2.9    17.6    +      -       -      +
    291F  LEU*     3.5     6.3    -      -       -      +
    293F  HIS*     1.3    76.7    -      -       -      +
    295F  PHE*     1.3    62.8    +      -       +      +
    297F  ARG*     5.6     5.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 295 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    291F  LEU*     2.9    34.6    +      -       +      +
    292F  SER      2.9     0.6    +      -       -      -
    294F  ALA*     1.3    84.2    -      -       +      +
    296F  GLY*     1.3    65.2    +      -       -      +
    297F  ARG*     3.1     7.0    +      -       -      -
    298F  ARG*     3.5    22.7    +      -       +      +
    299F  LEU*     3.8    30.2    +      -       +      -
    383F  THR*     3.2    54.3    -      -       +      -
    386F  ASN*     4.6    13.2    -      -       +      -
    387F  LEU*     4.8    15.9    -      -       +      -
    432F  PHE*     4.9     7.2    -      +       -      -
----------------------------------------------------------
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Residues in contact with GLY 296 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    292F  SER*     2.9    20.9    +      -       -      -
    293F  HIS      4.9     0.4    +      -       -      -
    295F  PHE*     1.3    77.1    -      -       -      +
    297F  ARG*     1.3    58.3    +      -       -      +
    298F  ARG      3.3     0.2    -      -       -      -
    299F  LEU*     3.3    12.8    +      -       -      +
    300F  VAL*     2.9    37.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 297 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    293F  HIS      5.6     3.4    +      -       -      -
    294F  ALA      5.6     5.3    +      -       -      +
    295F  PHE*     4.7     4.5    -      -       -      +
    296F  GLY*     1.3    77.5    -      -       -      +
    298F  ARG*     1.3    63.7    +      -       +      +
    300F  VAL*     3.1    13.1    -      -       +      +
    301F  LEU*     2.9    29.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 298 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    295F  PHE*     3.5    16.0    +      -       +      +
    296F  GLY      3.3     0.4    -      -       -      -
    297F  ARG*     1.3    85.9    -      -       +      +
    299F  LEU*     1.3    58.4    +      -       -      +
    301F  LEU*     3.2    12.0    +      -       +      +
    302F  SER      3.0    23.7    +      -       -      -
    379F  VAL*     3.5    18.7    -      -       +      +
    382F  GLU*     3.1    35.7    +      -       -      -
    383F  THR*     3.4    23.1    -      -       +      +
    386F  ASN*     4.5     7.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 299 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    291F  LEU*     5.2     3.6    -      -       +      -
    292F  SER*     6.4     0.9    -      -       -      -
    295F  PHE*     3.8    34.3    +      -       +      +
    296F  GLY*     3.3    12.9    +      -       -      +
    297F  ARG      3.3     0.4    -      -       -      -
    298F  ARG*     1.3    78.9    -      -       -      +
    300F  VAL*     1.3    59.3    +      -       +      +
    302F  SER*     3.2     6.2    +      -       -      -
    303F  SER*     2.8    32.4    +      -       -      +
    380F  ALA*     5.2     4.5    -      -       +      -
    383F  THR*     3.8    28.5    -      -       +      +
    432F  PHE*     4.0    15.9    -      -       +      +
    435F  CYS*     3.7    36.9    -      -       +      -
    436F  PRO*     4.8     2.2    -      -       +      +
    439F  TRP*     5.9     2.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 300 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    296F  GLY*     2.9    20.9    +      -       -      +
    297F  ARG*     3.1    22.2    -      -       +      +
    299F  LEU*     1.3    77.6    -      -       +      +
    301F  LEU*     1.3    52.7    +      -       -      +
    303F  SER*     3.6     9.4    -      -       -      +
    304F  THR*     2.6    40.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 301 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    297F  ARG      2.9    15.3    +      -       -      +
    298F  ARG*     3.3    13.9    -      -       +      +
    299F  LEU      3.1     0.2    -      -       -      -
    300F  VAL*     1.3    76.6    -      -       -      +
    302F  SER*     1.3    67.4    +      -       -      +
    304F  THR*     3.2     7.8    +      -       -      -
    305F  PHE*     3.0    60.0    +      -       +      -
    379F  VAL*     3.8    18.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 302 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    298F  ARG      3.0     8.6    +      -       -      -
    299F  LEU*     3.6     9.4    -      -       -      -
    301F  LEU*     1.3    75.4    -      -       -      +
    303F  SER*     1.3    63.8    +      -       -      +
    305F  PHE*     3.2     8.7    +      -       -      +
    306F  ARG      3.0     6.6    +      -       -      -
    376F  SER*     2.1    56.4    +      -       -      -
    379F  VAL*     3.5    24.5    -      -       -      -
    380F  ALA*     3.5    16.9    +      -       -      +
    436F  PRO*     4.0     5.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 303 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    299F  LEU*     2.8    20.9    +      -       -      +
    300F  VAL*     3.6    11.2    -      -       -      -
    301F  LEU      3.2     0.2    -      -       -      -
    302F  SER*     1.3    75.2    -      -       -      +
    304F  THR*     1.3    55.2    +      -       -      +
    306F  ARG*     2.6    25.7    +      -       -      +
    307F  ILE*     2.8    28.3    +      -       -      +
    435F  CYS*     5.7     0.3    -      -       -      -
    436F  PRO*     3.4    32.0    +      -       -      +
    439F  TRP*     4.6    14.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 304 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    300F  VAL*     2.6    27.6    +      -       -      +
    301F  LEU*     3.2     7.9    +      -       -      -
    303F  SER*     1.3    71.5    -      -       -      +
    305F  PHE*     1.3    68.2    +      -       +      +
    307F  ILE*     3.9     8.6    -      -       +      +
    308F  LEU*     2.9    33.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 305 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    301F  LEU*     3.0    47.5    +      -       +      -
    302F  SER*     3.2     7.9    -      -       -      +
    304F  THR*     1.3    82.3    -      -       +      +
    306F  ARG*     1.3    57.7    -      -       -      +
    308F  LEU*     3.9     4.9    -      -       +      +
    309F  ALA*     2.9    30.5    +      -       -      +
    372F  PHE*     4.0    12.5    -      +       +      +
    375F  ALA*     3.4    36.1    -      -       +      -
    376F  SER*     3.5    15.5    -      -       -      +
    379F  VAL*     3.7    13.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 306 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    302F  SER      3.0     6.3    +      -       -      +
    303F  SER*     2.6    17.4    +      -       -      +
    305F  PHE*     1.3    72.5    -      -       -      +
    307F  ILE*     1.3    56.3    +      -       -      +
    309F  ALA*     3.5     2.9    -      -       -      +
    310F  ASP*     2.9    40.7    +      -       -      +
    373F  LEU*     3.9    22.8    +      -       -      +
    376F  SER*     2.9    34.2    +      -       -      +
    377F  TYR*     4.1    26.9    -      -       -      +
    433F  PHE      5.2     2.6    +      -       -      -
    436F  PRO*     3.8    16.8    -      -       +      +
    437F  ASN*     3.6    35.1    +      -       -      +
    440F  ALA*     3.5    24.0    -      -       +      -
    592F  LEU*     5.6     3.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 307 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    303F  SER*     2.8    46.5    +      -       -      +
    304F  THR*     3.9     9.2    -      -       +      +
    306F  ARG*     1.3    69.4    -      -       -      +
    308F  LEU*     1.3    68.8    +      -       -      +
    310F  ASP*     2.5    22.4    -      -       -      +
    311F  LEU*     2.9    22.9    +      -       +      +
    439F  TRP*     4.6     5.4    -      -       +      +
    440F  ALA*     4.0    29.6    -      -       +      +
    443F  VAL*     4.2    32.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 308 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    304F  THR*     2.9    24.8    +      -       +      +
    305F  PHE*     3.9     6.1    -      -       +      +
    307F  ILE*     1.3    77.8    -      -       -      +
    309F  ALA*     1.3    67.5    +      -       -      +
    311F  LEU*     3.8     5.4    -      -       -      +
    312F  LEU*     2.9    28.7    +      -       +      +
    372F  PHE*     3.6    35.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 309 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    305F  PHE      2.9    19.0    +      -       -      +
    306F  ARG      3.5     3.8    -      -       -      +
    307F  ILE      3.2     0.2    -      -       -      -
    308F  LEU*     1.3    76.3    -      -       -      +
    310F  ASP*     1.3    57.7    +      -       -      +
    312F  LEU*     2.8    17.9    +      -       -      -
    369F  GLN*     2.2    52.5    +      -       -      +
    372F  PHE*     3.8    14.8    -      -       +      -
    373F  LEU*     3.6    17.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 310 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    306F  ARG*     2.9    23.9    +      -       -      +
    307F  ILE*     2.5    33.4    -      -       -      +
    309F  ALA*     1.3    73.6    -      -       -      +
    311F  LEU*     1.3    62.3    +      -       -      +
    313F  GLY*     3.7     1.2    -      -       -      -
    314F  PHE*     2.8    28.8    +      -       -      +
    369F  GLN*     3.5     8.2    +      -       -      +
    373F  LEU*     5.4     2.5    -      -       +      -
    440F  ALA*     4.1    17.3    -      -       -      +
    443F  VAL*     6.0     0.7    -      -       -      +
    444F  GLN*     3.4    47.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 311 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    307F  ILE*     2.9    24.3    +      -       +      +
    308F  LEU*     3.8     4.7    -      -       -      +
    310F  ASP*     1.3    82.1    +      -       -      +
    312F  LEU*     1.3    66.8    +      -       -      +
    314F  PHE*     3.1    20.5    -      -       +      +
    315F  ALA*     3.7     3.1    +      -       -      +
    443F  VAL*     6.1     4.7    -      -       +      -
    444F  GLN*     6.4     1.8    -      -       -      +
    447F  VAL*     3.6    40.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 312 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    308F  LEU*     2.9    17.9    +      -       +      +
    309F  ALA      2.8    13.1    +      -       -      +
    311F  LEU*     1.3    67.9    -      -       -      +
    313F  GLY*     1.3    52.4    +      -       -      +
    314F  PHE      3.0     3.6    -      -       -      -
    315F  ALA*     2.6    42.3    +      -       +      +
    365F  ALA*     3.7    38.5    -      -       +      +
    368F  LEU*     4.0    23.8    -      -       +      -
    369F  GLN*     4.1     8.5    -      -       -      +
    372F  PHE*     4.8    10.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 313 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    309F  ALA      2.9     2.6    +      -       -      -
    310F  ASP*     3.7     4.3    -      -       -      -
    312F  LEU*     1.3    69.7    -      -       -      +
    314F  PHE*     1.3    55.1    +      -       -      +
    315F  ALA      3.0     0.2    -      -       -      -
    316F  GLY*     2.9    23.0    +      -       -      -
    317F  PRO*     4.2     2.1    -      -       -      +
    365F  ALA*     5.8     2.7    -      -       -      -
    366F  LEU*     5.0    10.8    -      -       -      +
    369F  GLN*     2.8    37.3    -      -       -      +
    370F  ARG*     5.8     0.2    -      -       -      -
    585F  ILE*     4.9     9.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 314 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    310F  ASP      2.8    16.1    +      -       -      +
    311F  LEU*     3.1    18.8    -      -       +      +
    312F  LEU      2.9     0.4    +      -       -      -
    313F  GLY*     1.3    71.5    -      -       -      +
    315F  ALA*     1.3    55.6    +      -       -      +
    316F  GLY      3.0     8.9    +      -       -      -
    317F  PRO*     3.3    15.7    -      -       +      +
    318F  LEU*     4.8     6.0    -      -       +      +
    444F  GLN*     5.0    13.5    -      -       +      -
    447F  VAL*     3.4    28.5    -      -       +      -
    448F  GLY*     3.3    35.0    -      -       -      -
    451F  LEU*     3.3    36.6    -      -       +      +
    582F  LEU*     4.0    23.5    -      -       +      +
    585F  ILE*     5.4    13.2    -      -       +      -
    586F  LEU*     6.1     2.7    -      -       +      -
----------------------------------------------------------
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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