Contacts of the helix formed by residues 283 - 309 (chain C) in PDB entry 5Q14


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 SER 283 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    282C  PHE*     1.3    74.9    -      -       -      +
    284C  ALA*     1.4    59.5    +      -       -      +
    285C  GLU*     3.5    11.5    +      -       -      +
    286C  GLU*     3.0    39.2    +      -       -      +
    287C  ASN*     2.9    28.8    +      -       -      -
    358C  ASN      5.9     0.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 284 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    283C  SER*     1.4    72.2    -      -       -      +
    285C  GLU*     1.4    57.3    +      -       +      +
    287C  ASN      3.5     0.2    +      -       -      -
    288C  PHE*     3.0    26.0    +      -       -      +
    358C  ASN      5.5     1.6    +      -       -      +
    359C  SER      3.3    22.2    -      -       -      +
    360C  GLY*     3.8    13.2    -      -       -      -
    458C  TRP*     3.4    10.6    +      -       -      -
    459C  ARG*     3.3    39.5    -      -       +      +
    460C  VAL*     5.1     0.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 285 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    283C  SER*     3.7    10.8    -      -       -      +
    284C  ALA*     1.4    75.8    -      -       +      +
    286C  GLU*     1.4    62.5    +      -       +      +
    288C  PHE*     3.5     4.0    +      -       -      +
    289C  LEU*     3.4    21.0    +      -       -      +
    459C  ARG      4.5     2.9    -      -       -      +
    460C  VAL*     3.4    36.1    -      -       -      +
    461C  ASN*     3.6    23.6    +      -       -      +
    462C  ASP      5.4     0.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 286 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    281C  ALA      5.0     0.2    -      -       -      +
    282C  PHE*     3.5    31.4    -      -       +      +
    283C  SER*     3.0    39.1    +      -       -      +
    285C  GLU*     1.4    76.1    -      -       +      +
    287C  ASN*     1.3    58.3    +      -       -      +
    289C  LEU*     3.3     8.4    +      -       -      +
    290C  ILE*     3.0    33.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 287 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    277C  ILE*     6.0     2.9    -      -       -      +
    282C  PHE*     3.5    33.5    +      -       -      +
    283C  SER      2.9    18.1    +      -       -      +
    286C  GLU*     1.3    74.8    -      -       -      +
    288C  PHE*     1.4    58.6    +      -       -      +
    290C  ILE*     3.6    14.2    -      -       -      +
    291C  LEU*     2.9    30.1    +      -       -      +
    355C  ARG      4.9     3.8    +      -       -      -
    358C  ASN      4.7     1.2    +      -       -      -
    359C  SER*     3.4    43.2    +      -       -      +
    458C  TRP*     4.5     2.5    -      -       +      -
    501C  9MM      3.8    21.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 288 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    284C  ALA      3.0    18.4    +      -       -      +
    285C  GLU      3.7     6.1    -      -       -      +
    286C  GLU      3.3     0.4    -      -       -      -
    287C  ASN*     1.4    75.3    -      -       -      +
    289C  LEU*     1.3    60.3    +      -       +      +
    291C  LEU*     3.4    14.7    +      -       +      +
    292C  THR*     3.0    37.0    +      -       +      +
    455C  LEU*     3.9    22.0    -      -       +      -
    458C  TRP*     3.7    33.4    -      +       +      +
    460C  VAL*     4.0    18.4    -      -       +      -
    462C  ASP      4.4     4.0    -      -       -      -
    463C  HIS*     3.8    13.7    -      +       +      -
    464C  LYS*     3.4    33.0    -      -       +      -
    465C  PHE*     3.7    31.4    -      +       -      -
----------------------------------------------------------
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Residues in contact with LEU 289 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    285C  GLU      3.4     8.8    +      -       -      +
    286C  GLU*     3.3    10.9    +      -       -      +
    288C  PHE*     1.3    78.8    -      -       +      +
    290C  ILE*     1.3    65.6    +      -       +      +
    292C  THR*     3.0    14.3    +      -       -      +
    293C  GLU*     3.0    26.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 290 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    276C  LYS*     4.2    22.2    -      -       +      +
    277C  ILE*     5.6     2.5    -      -       +      -
    282C  PHE*     3.7    39.9    -      -       +      -
    286C  GLU*     3.0    24.6    +      -       +      +
    287C  ASN*     3.3    15.7    +      -       -      +
    289C  LEU*     1.3    74.9    -      -       +      +
    291C  LEU*     1.3    58.6    +      -       -      +
    293C  GLU*     3.6     6.0    -      -       -      +
    294C  MET*     3.0    58.1    +      -       +      +
    501C  9MM      3.7    16.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 291 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    287C  ASN      2.9    17.7    +      -       -      +
    288C  PHE*     3.5    13.7    -      -       +      +
    289C  LEU      3.2     0.2    -      -       -      -
    290C  ILE*     1.3    77.2    -      -       -      +
    292C  THR*     1.4    54.0    +      -       +      +
    294C  MET*     3.4     2.2    +      -       -      +
    295C  ALA*     2.8    39.8    +      -       +      +
    332C  MET*     4.9     6.3    -      -       +      -
    455C  LEU*     4.0    24.2    -      -       +      -
    458C  TRP*     3.6    33.0    -      -       +      -
    473C  TRP*     4.8     5.6    -      -       +      -
    501C  9MM      3.6    61.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with THR 292 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    288C  PHE*     3.0    32.0    +      -       +      +
    289C  LEU*     3.0    26.2    +      -       -      +
    291C  LEU*     1.4    76.4    -      -       +      +
    293C  GLU*     1.4    52.1    +      -       -      +
    295C  ALA*     4.4     0.4    -      -       -      -
    296C  THR*     2.7    39.2    +      -       -      -
    464C  LYS      3.8    22.5    +      -       -      +
    465C  PHE*     4.2     7.9    -      -       +      -
    466C  THR*     5.2     9.9    -      -       -      +
    469C  LEU*     3.4    21.9    -      -       +      +
    473C  TRP*     4.9     3.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 293 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    268C  ARG*     2.8    43.1    +      -       -      -
    289C  LEU*     3.0    20.7    +      -       +      +
    290C  ILE*     3.6     7.0    -      -       -      +
    292C  THR*     1.4    77.0    +      -       -      +
    294C  MET*     1.3    64.0    +      -       -      +
    296C  THR*     3.4     6.4    +      -       -      -
    297C  ASN*     3.0    25.6    +      -       -      +
    466C  THR*     6.1     0.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with MET 294 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    268C  ARG*     3.8    21.0    +      -       -      +
    273C  ILE*     4.4    22.2    -      -       +      +
    276C  LYS*     4.2    24.5    -      -       +      +
    277C  ILE*     5.2     3.4    -      -       +      -
    290C  ILE*     3.0    42.0    +      -       +      +
    291C  LEU*     3.8     2.9    -      -       +      +
    293C  GLU*     1.3    82.9    -      -       -      +
    295C  ALA*     1.4    56.3    +      -       -      +
    297C  ASN*     3.4     3.3    +      -       -      +
    298C  HIS*     2.9    29.2    +      -       -      +
    501C  9MM      3.7    54.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 295 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    291C  LEU*     2.8    22.8    +      -       +      +
    292C  THR      3.9     2.2    -      -       -      +
    294C  MET*     1.4    69.4    -      -       -      +
    296C  THR*     1.4    64.9    +      -       -      +
    298C  HIS*     3.4     2.6    +      -       -      +
    299C  VAL*     3.1    27.7    +      -       -      +
    332C  MET*     3.8    19.6    -      -       +      +
    469C  LEU*     3.8     6.1    -      -       +      -
    473C  TRP*     3.3    39.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 296 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    292C  THR      2.7    22.6    +      -       -      -
    293C  GLU*     3.7     6.3    -      -       -      -
    295C  ALA*     1.4    75.0    -      -       -      +
    297C  ASN*     1.3    63.5    +      -       -      +
    299C  VAL*     3.4     6.0    +      -       -      +
    300C  GLN*     3.2    46.4    +      -       -      +
    466C  THR*     3.1    37.0    +      -       +      +
    468C  LEU*     4.1    11.1    -      -       +      +
    469C  LEU*     3.3    11.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 297 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    268C  ARG*     3.6    48.3    +      -       -      +
    293C  GLU*     3.0    18.2    +      -       -      +
    294C  MET      3.7     4.0    -      -       -      +
    296C  THR*     1.3    75.6    -      -       -      +
    298C  HIS*     1.3    63.3    +      -       -      +
    300C  GLN*     3.3    17.0    +      -       -      +
    301C  VAL*     3.0    40.1    +      -       -      +
    501C  9MM      4.2     6.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 298 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    267C  GLN*     4.5     6.7    +      -       -      -
    294C  MET      2.9    18.2    +      -       -      +
    295C  ALA      3.6     5.6    +      -       -      +
    296C  THR      3.3     0.2    -      -       -      -
    297C  ASN*     1.3    78.9    +      -       -      +
    299C  VAL*     1.4    57.9    +      -       -      +
    301C  VAL*     3.4     6.2    +      -       +      +
    302C  LEU*     2.8    46.8    +      -       +      +
    328C  ALA*     3.9     8.1    +      -       -      -
    331C  ALA*     3.8    16.3    +      -       +      +
    332C  MET*     3.4    56.0    +      -       +      +
    335C  ARG*     4.1     8.8    -      -       +      +
    501C  9MM      3.1    32.8    -      +       +      +
----------------------------------------------------------
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Residues in contact with VAL 299 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    295C  ALA*     3.1    17.0    +      -       +      +
    296C  THR      3.7     6.1    -      -       -      +
    297C  ASN      3.3     0.2    -      -       -      -
    298C  HIS*     1.4    75.1    -      -       -      +
    300C  GLN*     1.3    60.0    +      -       -      +
    302C  LEU*     3.2     9.4    +      -       +      +
    303C  VAL*     2.9    39.7    +      -       +      +
    324C  LEU*     6.2     0.7    -      -       +      -
    328C  ALA*     5.0     7.6    -      -       +      -
    332C  MET*     6.3     0.7    -      -       -      -
    468C  LEU*     4.0    17.9    -      -       +      -
    469C  LEU*     4.1    12.1    -      -       +      -
    472C  ILE*     3.6    51.4    -      -       +      -
    473C  TRP*     5.4     2.0    -      -       -      +
    749D  LEU*     5.4     0.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 300 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    296C  THR*     3.2    34.0    +      -       -      +
    297C  ASN*     3.3    20.0    +      -       -      +
    299C  VAL*     1.3    76.1    -      -       -      +
    301C  VAL*     1.3    62.5    +      -       +      +
    303C  VAL*     3.4     3.3    +      -       -      +
    304C  GLU*     3.3    25.7    +      -       -      +
    468C  LEU*     3.7    18.0    -      -       +      +
    752D  LEU*     4.6    19.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 301 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    266C  LYS*     4.4    14.6    -      -       +      +
    267C  GLN*     3.6    40.6    -      -       +      +
    268C  ARG      5.6     1.1    -      -       -      +
    297C  ASN*     3.0    39.1    +      -       -      +
    298C  HIS*     3.8     6.5    -      -       +      +
    300C  GLN*     1.3    72.2    -      -       +      +
    302C  LEU*     1.3    60.8    +      -       -      +
    304C  GLU*     3.2     9.1    +      -       +      +
    305C  PHE*     3.0    29.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 302 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    298C  HIS*     2.8    32.0    +      -       +      +
    299C  VAL*     3.2     8.0    +      -       +      +
    301C  VAL*     1.3    76.6    -      -       -      +
    303C  VAL*     1.3    53.4    +      -       -      +
    305C  PHE*     3.3     8.9    +      -       +      +
    306C  THR*     2.7    43.0    +      -       -      +
    324C  LEU*     4.4    11.7    -      -       +      -
    327C  SER*     4.7     4.3    -      -       -      +
    328C  ALA*     3.6    36.1    -      -       +      +
    331C  ALA*     3.7    22.9    -      -       +      -
    390C  THR*     4.3     8.3    -      -       +      -
    394C  ILE*     3.7    25.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 303 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    299C  VAL*     2.9    25.7    +      -       +      +
    300C  GLN      3.8     5.2    -      -       -      +
    302C  LEU*     1.3    73.9    -      -       -      +
    304C  GLU*     1.4    59.7    +      -       -      +
    306C  THR*     3.3     1.8    +      -       -      -
    307C  LYS*     2.9    36.2    +      -       +      +
    324C  LEU*     3.9    36.3    -      -       +      -
    749D  LEU*     4.0    14.8    -      -       +      +
    752D  LEU*     3.6    50.0    -      -       +      +
    753D  LEU*     4.1     4.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 304 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    300C  GLN      3.3    12.7    +      -       -      +
    301C  VAL*     3.2    11.3    +      -       +      +
    303C  VAL*     1.4    81.1    -      -       -      +
    305C  PHE*     1.3    61.9    +      -       -      +
    307C  LYS*     3.6    24.6    +      -       -      +
    308C  LYS*     3.4    41.0    +      -       -      +
    752D  LEU*     3.9     6.9    -      -       -      +
    755D  LYS*     3.5    35.4    +      -       -      +
    756D  ASP      5.4     2.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 305 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    260C  ILE*     3.7    17.5    -      -       +      -
    263C  SER*     3.8    17.7    -      -       -      +
    264C  TYR*     3.7    44.9    -      +       +      -
    267C  GLN*     6.6     0.2    -      -       +      -
    301C  VAL*     3.0    15.9    +      -       +      +
    302C  LEU*     3.5    13.0    -      -       +      +
    304C  GLU*     1.3    76.5    -      -       -      +
    306C  THR*     1.3    58.5    +      -       -      +
    308C  LYS*     3.2    16.9    +      -       -      +
    309C  LEU*     3.3    33.6    +      -       +      +
    387C  ALA      3.9    17.3    -      -       -      -
    390C  THR*     4.1     9.9    -      -       +      -
    391C  ALA*     4.0    11.7    -      -       +      -
    394C  ILE*     3.7    31.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 306 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    302C  LEU*     2.7    24.4    +      -       -      +
    303C  VAL      3.6     4.5    -      -       -      -
    305C  PHE*     1.3    72.5    -      -       -      +
    307C  LYS*     1.3    56.3    +      -       -      +
    309C  LEU*     3.0    25.5    +      -       -      +
    312C  PHE*     3.4    53.0    -      -       +      +
    324C  LEU*     3.6    22.6    -      -       +      +
    394C  ILE*     3.4    33.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 307 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    303C  VAL*     2.9    22.3    +      -       +      +
    304C  GLU*     3.8    25.4    +      -       -      +
    305C  PHE      3.4     0.2    -      -       -      -
    306C  THR*     1.3    73.9    -      -       -      +
    308C  LYS*     1.3    60.7    +      -       +      +
    309C  LEU      3.4     4.2    -      -       -      +
    312C  PHE*     4.2     8.8    -      -       -      +
    313C  GLN*     3.7    34.7    +      -       -      +
    752D  LEU      2.7    27.8    +      -       -      +
    753D  LEU*     3.2    37.2    -      -       +      +
    755D  LYS*     3.6     6.9    -      -       -      +
    756D  ASP*     3.1    34.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 308 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    259C  PHE*     3.0    36.3    -      -       +      -
    263C  SER*     3.5    33.8    +      -       -      +
    266C  LYS*     4.1    33.5    -      -       -      +
    304C  GLU*     3.4    28.8    +      -       -      +
    305C  PHE*     3.2     9.9    +      -       -      +
    306C  THR      3.2     0.8    -      -       -      -
    307C  LYS*     1.3    77.2    -      -       +      +
    309C  LEU*     1.4    65.7    +      -       -      +
    310C  PRO*     3.3     1.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 309 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    260C  ILE*     3.5    28.0    -      -       +      -
    305C  PHE*     3.3    21.0    +      -       +      +
    306C  THR*     3.0    27.4    +      -       +      +
    307C  LYS      4.3     2.1    -      -       -      +
    308C  LYS*     1.4    77.1    -      -       -      +
    310C  PRO*     1.4    72.7    -      -       +      +
    311C  GLY      3.2     0.7    +      -       -      -
    312C  PHE*     3.0    23.6    +      -       +      +
    313C  GLN      4.8     0.2    +      -       -      -
    391C  ALA*     3.6    20.2    -      -       +      +
    394C  ILE*     4.0    30.7    -      -       +      -
    395C  LEU*     4.0    26.9    -      -       +      -
    415C  LEU*     4.9     2.5    -      -       +      -
----------------------------------------------------------
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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