Contacts of the helix formed by residues 308 - 334 (chain B) in PDB entry 4DJH


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 308 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    293B  PHE*     4.2    14.7    -      -       +      -
    305B  SER*     4.4    16.5    -      -       -      +
    306B  THR      3.3     1.6    -      -       -      +
    307B  ALA*     1.3    73.8    -      -       -      +
    309B  LEU*     1.3    55.2    +      -       -      +
    310B  SER      2.9     3.6    -      -       -      -
    311B  SER*     2.7    43.4    +      -       -      +
    312B  TYR      3.4     3.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 309 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    122B  ASN*     6.1     2.5    -      -       -      +
    293B  PHE*     5.8     0.2    -      -       -      -
    305B  SER      5.4     0.2    +      -       -      -
    306B  THR*     3.8    19.0    +      -       +      +
    307B  ALA*     3.0     1.9    -      -       -      -
    308B  ALA*     1.3    77.7    -      -       -      +
    310B  SER*     1.3    60.4    +      -       -      +
    312B  TYR*     3.5    17.3    +      -       +      +
    313B  TYR*     3.0    57.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 310 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    307B  ALA      3.6    12.1    +      -       -      -
    308B  ALA      2.9     0.6    +      -       -      -
    309B  LEU*     1.3    77.5    -      -       -      +
    311B  SER*     1.3    63.6    +      -       -      +
    313B  TYR*     3.5     9.0    +      -       -      +
    314B  PHE*     3.1    21.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 311 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    293B  PHE*     3.7    17.3    -      -       -      -
    308B  ALA*     2.7    26.5    +      -       -      +
    310B  SER*     1.3    69.6    -      -       -      +
    312B  TYR*     1.3    54.6    +      -       -      -
    313B  TYR      3.1     1.6    -      -       -      -
    314B  PHE*     2.9    10.3    +      -       -      +
    315B  CYS*     2.8    42.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 312 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    115B  GLN*     4.4     4.0    +      -       -      -
    290B  ILE*     4.5     5.6    -      -       +      -
    293B  PHE*     3.7    35.2    -      +       +      -
    294B  ILE*     4.5    15.9    -      -       +      -
    297B  GLU*     5.7     0.9    -      -       -      -
    308B  ALA      3.4     2.0    +      -       -      -
    309B  LEU*     3.6    18.4    -      -       +      +
    311B  SER*     1.3    78.0    -      -       -      +
    313B  TYR*     1.3    98.4    +      +       -      +
    315B  CYS*     3.3     5.6    +      -       -      +
    316B  ILE*     3.1    46.9    +      -       +      +
   1300B  JDC      3.9    33.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 313 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    115B  GLN*     3.7    21.1    +      -       +      -
    119B  TYR*     3.4    50.0    -      +       +      +
    309B  LEU*     3.0    51.0    +      -       +      +
    310B  SER*     3.8    10.3    -      -       -      +
    311B  SER      3.1     0.8    -      -       -      -
    312B  TYR*     1.3    94.1    -      +       -      +
    314B  PHE*     1.3    63.1    +      -       -      +
    316B  ILE*     3.2    20.1    -      -       +      +
    317B  ALA*     3.1    21.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 314 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    289B  PRO*     5.4     7.0    -      -       +      -
    310B  SER      3.1    12.9    +      -       -      +
    311B  SER*     2.9    11.3    +      -       -      +
    313B  TYR*     1.3    76.0    -      -       -      +
    315B  CYS*     1.3    75.1    +      -       -      +
    317B  ALA*     3.1    16.6    +      -       +      +
    318B  LEU*     3.2    43.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with CYS 315 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    286B  CYS      4.3     2.1    -      -       -      +
    289B  PRO*     3.7    34.5    -      -       -      -
    290B  ILE*     3.7    32.9    +      -       +      +
    293B  PHE*     4.1    15.5    -      -       +      -
    311B  SER*     2.8    23.1    +      -       -      +
    312B  TYR*     3.7     6.1    -      -       -      +
    313B  TYR      3.3     0.2    -      -       -      -
    314B  PHE*     1.3    87.1    -      -       -      +
    316B  ILE*     1.3    60.6    +      -       -      +
    318B  LEU*     3.3    14.4    +      -       -      +
    319B  GLY*     3.5     7.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 316 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    115B  GLN*     2.6    35.7    -      -       +      +
    290B  ILE*     3.5    21.3    -      -       +      -
    312B  TYR*     3.1    29.3    +      -       +      +
    313B  TYR*     3.2    30.5    -      -       +      +
    315B  CYS*     1.3    74.8    -      -       -      +
    317B  ALA*     1.3    60.8    +      -       -      +
    318B  LEU      3.2     0.2    -      -       -      -
    319B  GLY*     3.4     2.1    +      -       -      +
    320B  TYR*     3.0    44.2    +      -       +      -
   1300B  JDC      3.6    29.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 317 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    313B  TYR      3.1    15.1    +      -       -      +
    314B  PHE*     3.1    17.7    +      -       +      +
    316B  ILE*     1.3    79.3    -      -       -      +
    318B  LEU*     1.3    57.7    +      -       +      +
    320B  TYR*     3.8     7.3    -      -       -      +
    321B  THR*     2.6    40.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 318 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    285B  VAL*     5.1     4.9    -      -       +      +
    286B  CYS*     3.2    56.0    -      -       -      +
    289B  PRO*     4.7     9.0    -      -       +      -
    314B  PHE*     3.2    50.8    +      -       +      +
    315B  CYS*     3.5     7.6    -      -       -      +
    317B  ALA*     1.3    77.5    -      -       +      +
    319B  GLY*     1.3    59.5    +      -       -      +
    321B  THR*     3.6     9.1    -      -       +      +
    322B  ASN      3.0    23.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 319 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    286B  CYS      4.1     2.4    +      -       -      -
    287B  TRP*     4.1    21.3    +      -       -      -
    290B  ILE*     5.9     0.7    -      -       -      -
    315B  CYS      3.5     6.0    +      -       -      -
    316B  ILE      3.4     4.8    +      -       -      -
    317B  ALA      3.3     0.4    -      -       -      -
    318B  LEU*     1.3    75.6    -      -       -      +
    320B  TYR*     1.3    66.1    +      -       -      +
    322B  ASN*     3.3    12.0    +      -       -      +
    323B  SER*     3.4    14.4    +      -       -      -
   1300B  JDC      3.8    24.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 320 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     69B  VAL*     3.7    11.0    -      -       +      +
    108B  VAL*     3.3    24.2    -      -       +      -
    109B  THR*     4.8     2.8    +      -       -      -
    111B  THR*     2.7    23.4    +      -       -      -
    112B  MET*     3.2    52.1    -      -       +      +
    115B  GLN*     4.0    14.8    -      -       +      +
    316B  ILE*     3.0    34.9    +      -       +      +
    317B  ALA*     3.9     6.7    -      -       -      +
    319B  GLY*     1.3    74.2    -      -       -      +
    321B  THR*     1.3    62.8    +      -       -      +
    323B  SER*     3.1    21.5    +      -       -      -
    324B  SER      3.5     4.2    +      -       -      -
   1300B  JDC      3.4    51.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 321 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65B  VAL*     5.5     2.4    -      -       -      +
     69B  VAL*     3.9    19.4    -      -       +      +
    286B  CYS*     5.5     0.7    -      -       -      -
    317B  ALA*     2.6    27.1    +      -       -      +
    318B  LEU*     3.6    14.4    -      -       +      +
    319B  GLY      3.2     0.2    -      -       -      -
    320B  TYR*     1.3    78.7    -      -       -      +
    322B  ASN*     1.3    62.4    +      -       -      +
    324B  SER*     2.9    24.7    +      -       -      +
    325B  LEU*     3.0    30.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 322 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    105B  ASP*     4.5     4.4    +      -       -      -
    282B  VAL*     3.7     9.0    -      -       -      +
    283B  PHE*     3.1    54.7    +      -       -      +
    286B  CYS*     3.7    11.9    -      -       +      -
    287B  TRP*     4.2     8.7    -      -       -      +
    318B  LEU      3.0    18.1    +      -       -      +
    319B  GLY      3.6     5.8    +      -       -      +
    320B  TYR      3.2     0.4    -      -       -      -
    321B  THR*     1.3    76.4    -      -       -      +
    323B  SER*     1.3    65.9    +      -       -      +
    325B  LEU*     3.2    18.7    +      -       -      +
    326B  ASN*     3.3    31.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 323 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     73B  GLY*     4.5     0.7    -      -       -      -
     77B  ASN*     2.8    24.6    +      -       -      -
    105B  ASP*     3.5    41.3    +      -       -      +
    108B  VAL*     3.3    20.2    -      -       -      +
    109B  THR*     3.9     9.2    -      -       -      -
    141B  ASN*     4.7     0.9    +      -       -      -
    287B  TRP*     5.7     1.7    +      -       -      -
    319B  GLY      3.4    11.1    +      -       -      -
    320B  TYR*     3.1    11.8    +      -       -      -
    322B  ASN*     1.3    79.5    +      -       -      +
    324B  SER*     1.3    58.8    +      -       -      +
    327B  PRO*     3.3     9.2    -      -       -      +
   1300B  JDC      5.5     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 324 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     69B  VAL*     3.2    47.7    +      -       -      +
     72B  VAL*     3.4    24.0    -      -       -      +
     73B  GLY*     3.4    18.2    -      -       -      -
    320B  TYR      3.5     0.8    +      -       -      -
    321B  THR*     2.9    15.9    +      -       -      +
    323B  SER*     1.3    77.7    -      -       -      +
    325B  LEU*     1.3    64.4    +      -       -      +
    327B  PRO*     3.5     6.5    -      -       -      +
    328B  ILE*     3.9     6.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 325 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    282B  VAL*     3.7    30.5    -      -       +      -
    286B  CYS*     4.6     4.3    -      -       -      -
    321B  THR*     3.0    36.3    +      -       +      +
    322B  ASN*     3.2    10.7    +      -       -      +
    324B  SER*     1.3    79.3    -      -       -      +
    326B  ASN*     1.3    68.0    +      -       -      +
    328B  ILE*     2.9    27.6    +      -       +      +
    329B  LEU*     2.9    25.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 326 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     77B  ASN*     4.7     0.2    -      -       -      +
    101B  LEU*     3.8    16.2    -      -       -      +
    105B  ASP*     2.5    31.0    +      -       -      +
    279B  VAL*     3.9    19.6    -      -       -      +
    282B  VAL*     5.6     0.5    -      -       -      +
    283B  PHE*     5.6     1.6    -      -       -      +
    322B  ASN*     3.3    28.9    +      -       -      +
    325B  LEU*     1.3    75.2    -      -       -      +
    327B  PRO*     1.3    72.3    -      -       +      +
    329B  LEU*     2.8    26.4    +      -       -      +
    330B  TYR*     2.9    38.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with PRO 327 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     72B  VAL*     4.2     7.0    -      -       +      +
     76B  GLY*     3.6    31.9    -      -       -      +
     77B  ASN*     3.3    30.7    -      -       -      +
     80B  VAL*     4.6     1.6    -      -       +      -
    323B  SER      3.3    12.8    -      -       -      +
    324B  SER      3.5     8.5    -      -       -      +
    325B  LEU      3.5     3.1    -      -       -      -
    326B  ASN*     1.3    95.7    -      -       +      +
    328B  ILE*     1.3    60.2    +      -       +      +
    330B  TYR*     3.5    16.4    +      -       +      +
    331B  ALA*     3.4    19.1    +      -       -      +
    341B  PHE*     4.0     7.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 328 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     72B  VAL*     4.0    24.9    -      -       +      -
    324B  SER      3.9    11.9    -      -       -      +
    325B  LEU*     2.9    21.5    +      -       +      +
    327B  PRO*     1.3    73.9    -      -       +      +
    329B  LEU*     1.3    69.1    +      -       +      +
    331B  ALA*     3.3     8.1    +      -       -      +
    332B  PHE*     3.2    39.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 329 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    275B  LEU*     4.3     2.0    -      -       -      -
    278B  VAL*     4.2    19.3    -      -       +      -
    279B  VAL*     4.2    26.7    -      -       +      -
    282B  VAL*     4.1    27.1    -      -       +      -
    325B  LEU*     2.9    26.6    +      -       +      +
    326B  ASN*     2.8    23.1    +      -       -      +
    328B  ILE*     1.3    72.1    -      -       +      +
    330B  TYR*     1.3    65.7    +      -       -      +
    332B  PHE*     3.2     5.2    +      -       +      +
    333B  LEU*     2.9    41.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 330 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     77B  ASN*     4.6     5.2    -      -       -      -
     80B  VAL*     3.6    21.1    -      -       +      -
     98B  ILE*     3.8    43.6    +      -       +      +
    101B  LEU*     3.2    31.9    -      -       +      +
    102B  ALA*     4.6     2.6    +      -       +      -
    105B  ASP*     4.6     0.2    +      -       -      -
    152B  MET*     5.3     0.9    -      -       +      -
    275B  LEU*     4.1    16.6    -      -       +      -
    279B  VAL*     4.1    20.4    -      -       +      -
    326B  ASN*     2.9    39.8    +      -       +      +
    327B  PRO*     3.5    17.7    -      -       +      +
    328B  ILE      3.3     0.2    -      -       -      -
    329B  LEU*     1.3    74.8    -      -       -      +
    331B  ALA*     1.3    56.9    +      -       -      +
    334B  ASP*     3.0    35.5    +      -       -      +
    337B  PHE*     3.6    25.0    -      +       +      +
    341B  PHE*     4.6     2.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 331 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    346A  PHE*     4.6    13.5    -      -       +      -
    327B  PRO      3.4     5.4    +      -       -      +
    328B  ILE*     3.3    11.4    +      -       +      +
    329B  LEU      3.1     0.4    -      -       -      -
    330B  TYR*     1.3    79.7    -      -       -      +
    332B  PHE*     1.3    70.0    +      -       +      +
    334B  ASP      3.4     4.5    +      -       -      +
    338B  LYS*     3.2    35.9    -      -       -      +
    341B  PHE*     3.7    29.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 332 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    345A  CYS      5.4     7.6    -      -       -      -
    346A  PHE*     6.3     1.6    -      +       -      -
    274B  ARG*     4.8     3.6    +      -       -      -
    328B  ILE*     3.2    30.3    +      -       +      +
    329B  LEU*     3.2     7.4    +      -       +      +
    331B  ALA*     1.3    89.1    -      -       +      +
    333B  LEU*     1.3    68.7    +      -       +      +
    334B  ASP      3.5     0.6    -      -       -      -
    338B  LYS*     4.5    18.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 333 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    271B  ARG*     3.7    30.2    -      -       -      +
    274B  ARG*     3.9    36.9    +      -       +      +
    275B  LEU*     3.4    30.8    -      -       +      +
    278B  VAL*     3.7    39.0    -      -       +      -
    329B  LEU*     2.9    27.2    +      -       +      +
    332B  PHE*     1.3    87.4    -      -       +      +
    334B  ASP*     1.3    60.4    +      -       -      +
    335B  GLU      4.3     0.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 334 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     90B  MET*     4.9     1.0    -      -       -      +
     95B  ASN*     4.9     3.3    +      -       -      +
    271B  ARG*     4.6     6.2    -      -       -      +
    272B  ILE*     4.3    19.3    -      -       -      +
    275B  LEU*     4.3    13.0    -      -       +      -
    330B  TYR      3.0    14.6    +      -       -      +
    331B  ALA      3.4     9.0    -      -       -      +
    332B  PHE      3.5     1.2    -      -       -      -
    333B  LEU*     1.3    81.7    -      -       -      +
    335B  GLU*     1.3    69.3    +      -       -      +
    336B  ASN*     3.6    17.5    +      -       -      +
    337B  PHE*     3.0    37.9    +      -       +      -
    338B  LYS*     3.1    18.3    +      -       -      -
----------------------------------------------------------
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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