Contacts of the helix formed by residues 332 - 356 (chain D) in PDB entry 3U1K


Residue contacts within the protein are derived with the CSU software (Sobolev V., Sorokine A., Prilusky J., Abola E.E. and Edelman M. (1999) Automated analysis of interatomic contacts in proteins. Bioinformatics, 15, 327-332). A short description of the analytical approach is given at the end of the page.
For CSU analysis of other PDB entry

Note:
Non-standard 3 letter residue codes indicate a heterogroup. To identify and analyse, use LPC software

Legend:
Dist - nearest distance (Å) between atoms of two residues
Surf - contact surface area (Å2) between two residues
HB   - hydrophilic-hydrophilic contact (hydrogen bond)
Arom - aromatic-aromatic contact
Phob - hydrophobic-hydrophobic contact
DC   - hydrophobic-hydrophilic contact (destabilizing contact)
+/-  - indicates presence/absence of a specific contacts
*    - indicates residues forming contacts  by their side chain
       (including CA atoms)
Residues in contact with ASP 332 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    275D  LYS*     5.4    10.1    +      -       -      +
    277D  PHE*     5.6     6.1    -      -       -      -
    330D  GLU      3.5     2.9    +      -       -      -
    331D  ALA*     1.3    72.2    -      -       -      +
    333D  PRO*     1.3    81.8    -      -       -      +
    334D  TYR*     3.0    45.3    +      -       -      +
    335D  GLU*     2.7    44.0    +      -       +      +
    336D  ILE*     3.2     7.0    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with PRO 333 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    325D  LYS*     4.7    14.8    -      -       -      +
    331D  ALA      3.6     5.8    -      -       -      +
    332D  ASP*     1.3    93.7    -      -       -      +
    334D  TYR*     1.3    67.1    +      -       +      +
    336D  ILE*     3.2    13.2    +      -       +      +
    337D  ILE*     3.0    36.9    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with TYR 334 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     94D  GLN*     2.9    49.7    +      -       +      +
    277D  PHE*     6.2     5.4    -      +       +      -
    332D  ASP*     3.0    31.3    -      -       -      +
    333D  PRO*     1.3    83.0    -      -       +      +
    335D  GLU*     1.3    60.0    +      -       -      +
    337D  ILE*     3.2    17.1    +      -       +      +
    338D  GLU*     2.8    34.7    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 335 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    275D  LYS*     4.9    14.0    +      -       -      +
    278D  THR      4.0     5.0    -      -       -      +
    279D  PRO*     3.9    13.9    -      -       +      +
    280D  SER*     3.0    33.8    +      -       -      -
    283D  ILE*     3.8    23.6    -      -       +      +
    331D  ALA*     4.4     3.5    -      -       -      +
    332D  ASP*     2.7    35.7    +      -       +      +
    334D  TYR*     1.3    75.3    -      -       -      +
    336D  ILE*     1.3    56.1    +      -       +      +
    338D  GLU*     3.8     5.6    -      -       -      +
    339D  SER*     2.8    31.4    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 336 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    283D  ILE*     4.9     7.6    -      -       +      -
    321D  GLU*     3.5    38.1    -      -       +      +
    324D  LEU*     3.9    30.2    -      -       +      +
    325D  LYS*     4.5    18.6    -      -       +      +
    328D  PHE*     4.7     5.4    -      -       +      +
    331D  ALA*     3.7    32.1    -      -       +      +
    332D  ASP      3.2    18.1    +      -       -      +
    333D  PRO*     3.4    11.2    -      -       +      +
    335D  GLU*     1.3    76.7    -      -       +      +
    337D  ILE*     1.3    59.0    +      -       +      +
    339D  SER*     3.3     7.3    +      -       -      -
    340D  PHE*     3.0    26.2    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 337 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     94D  GLN*     5.6     0.9    -      -       -      +
    317D  ARG*     5.2     6.3    -      -       -      +
    321D  GLU*     3.3    28.5    -      -       -      +
    333D  PRO*     3.0    22.3    +      -       +      +
    334D  TYR*     3.2    19.9    +      -       +      +
    336D  ILE*     1.3    74.6    -      -       +      +
    338D  GLU*     1.3    66.1    +      -       -      +
    340D  PHE*     3.1     5.0    +      -       -      +
    341D  ASN*     3.0    41.2    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 338 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     94D  GLN*     5.6     3.6    -      -       +      +
     95D  PHE*     6.5     1.1    -      -       -      -
    145D  GLY      5.8     0.3    +      -       -      -
    147D  PHE*     4.2    19.4    -      -       +      -
    277D  PHE*     3.6    22.3    -      -       +      +
    278D  THR*     5.7     0.7    -      -       -      +
    279D  PRO*     4.3    17.4    -      -       +      +
    334D  TYR*     2.8    22.4    +      -       +      +
    335D  GLU*     3.8     6.7    -      -       -      +
    337D  ILE*     1.3    72.4    -      -       -      +
    339D  SER*     1.3    63.9    +      -       -      +
    341D  ASN*     3.1    20.0    +      -       -      +
    342D  VAL*     2.9    26.4    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 339 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    279D  PRO*     3.7     9.4    -      -       -      +
    283D  ILE*     3.2    15.6    -      -       -      +
    284D  VAL*     3.2    25.6    +      -       -      +
    287D  THR*     3.1    18.7    +      -       -      -
    324D  LEU*     4.9     0.2    -      -       -      -
    335D  GLU      2.8    20.0    +      -       -      -
    336D  ILE      3.5     5.2    -      -       -      -
    337D  ILE      3.2     0.2    -      -       -      -
    338D  GLU*     1.3    77.6    -      -       -      +
    340D  PHE*     1.3    59.5    +      -       -      +
    342D  VAL*     2.8    25.7    -      -       -      +
    343D  VAL*     3.2    13.2    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE 340 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    287D  THR*     3.9    16.5    -      -       +      +
    291D  ALA*     4.2     7.2    -      -       +      -
    295D  LEU*     4.0    21.1    -      -       +      -
    313D  VAL*     3.9    17.0    -      -       +      -
    316D  ILE*     4.0     5.6    -      -       +      -
    317D  ARG*     3.4    70.7    -      -       +      -
    320D  THR*     3.3    29.8    -      -       +      +
    321D  GLU*     4.1    11.9    -      -       +      +
    324D  LEU*     5.4     0.7    -      -       +      -
    336D  ILE      3.0    12.8    +      -       -      +
    337D  ILE      3.1     6.7    +      -       -      +
    339D  SER*     1.3    75.3    -      -       -      +
    341D  ASN*     1.3    58.2    -      -       -      +
    343D  VAL*     3.1     3.3    +      -       -      +
    344D  ALA*     2.8    32.2    +      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ASN 341 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     95D  PHE*     6.0     5.7    -      -       -      -
    317D  ARG*     2.9    28.6    +      -       -      -
    337D  ILE*     3.0    35.1    +      -       -      +
    338D  GLU*     3.1    19.5    +      -       -      +
    340D  PHE*     1.3    77.2    -      -       -      +
    342D  VAL*     1.3    57.6    +      -       -      +
    344D  ALA*     3.3     4.5    +      -       -      +
    345D  LYS*     2.8    31.6    +      -       -      +
    540D  ASN*     5.2     0.2    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 342 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    279D  PRO*     3.6    21.3    -      -       +      -
    284D  VAL*     4.2    17.7    -      -       +      -
    338D  GLU*     2.9    16.7    +      -       -      +
    339D  SER*     2.8    33.0    -      -       -      +
    341D  ASN*     1.3    72.0    -      -       -      +
    343D  VAL*     1.3    57.5    +      -       -      +
    345D  LYS*     3.4     9.3    +      -       +      +
    346D  GLU*     3.0    34.8    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 343 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    284D  VAL*     3.5    30.3    -      -       +      +
    287D  THR*     3.4    24.9    -      -       +      +
    288D  HIS*     3.8    26.9    -      -       +      +
    291D  ALA*     4.8     1.3    -      -       +      -
    292D  MET      5.2     0.7    -      -       -      +
    295D  LEU*     3.8    19.5    -      -       +      -
    339D  SER      3.2    13.2    +      -       -      +
    340D  PHE*     3.1     8.6    +      -       +      +
    342D  VAL*     1.3    76.0    -      -       -      +
    344D  ALA*     1.3    66.7    +      -       -      +
    346D  GLU*     3.2     6.1    +      -       -      +
    347D  VAL*     3.0    30.0    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 344 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    295D  LEU*     3.9    22.0    -      -       +      -
    299D  PHE*     3.7    11.7    -      -       +      -
    313D  VAL*     4.9     5.4    -      -       +      -
    340D  PHE*     2.8    36.8    +      -       +      +
    341D  ASN*     3.8     5.8    -      -       -      +
    343D  VAL*     1.3    73.7    -      -       -      +
    345D  LYS*     1.3    62.9    +      -       -      +
    347D  VAL*     3.5     0.4    +      -       -      -
    348D  PHE*     3.0    26.5    +      -       -      +
    540D  ASN*     4.9     3.8    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 345 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    341D  ASN      2.8    19.4    +      -       -      +
    342D  VAL*     3.6     8.3    -      -       -      +
    344D  ALA*     1.3    77.6    -      -       -      +
    346D  GLU*     1.3    57.4    +      -       -      +
    348D  PHE*     3.6     1.4    +      -       -      +
    349D  ARG*     3.0    58.7    +      -       -      +
    539D  TYR      4.6     5.5    +      -       -      +
    540D  ASN*     3.6    49.1    +      -       -      +
    541D  GLY      4.7     6.4    +      -       -      -
    542D  ASP*     5.1     2.4    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 346 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    288D  HIS*     5.6     9.3    -      -       +      +
    342D  VAL*     3.0    23.2    +      -       +      +
    343D  VAL*     3.2     6.9    +      -       -      +
    345D  LYS*     1.3    73.4    -      -       -      +
    347D  VAL*     1.3    67.5    +      -       +      +
    349D  ARG*     3.2    15.4    +      -       -      +
    350D  SER*     2.9    29.9    +      -       -      -
    353D  LEU*     6.0     1.7    -      -       -      +
    516D  LYS*     5.5     8.9    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 347 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    288D  HIS*     4.7    10.3    -      -       +      -
    292D  MET*     4.2    22.2    -      -       +      +
    295D  LEU*     4.1    22.2    -      -       +      -
    296D  TYR*     3.8    37.0    -      -       +      +
    299D  PHE*     4.2     6.7    -      -       +      -
    343D  VAL*     3.0    23.5    +      -       +      +
    344D  ALA      4.0     2.9    -      -       -      +
    346D  GLU*     1.3    74.7    -      -       -      +
    348D  PHE*     1.3    66.2    +      -       -      +
    350D  SER*     2.6    26.6    +      -       -      +
    351D  ILE*     3.3    11.2    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE 348 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    299D  PHE*     3.7    32.6    -      +       +      -
    344D  ALA      3.0    18.6    +      -       -      +
    345D  LYS      3.6     3.6    -      -       -      +
    347D  VAL*     1.3    78.6    -      -       -      +
    349D  ARG*     1.3    69.6    +      -       +      +
    351D  ILE*     3.5    16.2    +      -       -      +
    352D  VAL*     3.7    18.8    +      -       +      +
    359D  CYS*     3.6    32.8    -      -       +      -
    514D  VAL*     5.6     6.1    -      -       +      -
    530D  LEU*     6.0     0.4    -      -       +      -
    536D  ILE*     3.7    29.8    -      -       +      -
    537D  GLU*     3.7    34.3    -      -       +      -
    540D  ASN*     3.6    28.7    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 349 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    345D  LYS*     3.0    41.3    +      -       -      +
    346D  GLU*     3.2    15.9    +      -       -      +
    348D  PHE*     1.3    83.6    -      -       +      +
    350D  SER*     1.3    65.6    +      -       -      +
    352D  VAL*     3.1     8.6    +      -       -      +
    353D  LEU*     3.0    29.4    +      -       +      +
    514D  VAL*     3.7    22.6    -      -       +      +
    515D  THR*     3.1    33.0    +      -       -      +
    540D  ASN      2.8    38.9    +      -       -      +
    541D  GLY*     3.7     5.1    -      -       -      -
    542D  ASP*     2.9    41.1    +      -       -      -
    563D  LEU*     5.2     1.8    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 350 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    296D  TYR*     5.6     1.9    -      -       -      -
    346D  GLU*     2.9    21.7    +      -       -      -
    347D  VAL*     2.6    25.9    +      -       -      +
    349D  ARG*     1.3    76.6    -      -       -      +
    351D  ILE*     1.3    59.8    +      -       -      +
    353D  LEU*     3.1     8.6    +      -       -      -
    354D  ASN*     2.8    51.5    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 351 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    296D  TYR*     4.2    24.0    -      -       +      +
    299D  PHE*     3.4    39.0    -      -       +      +
    300D  THR*     3.9    27.1    -      -       +      -
    302D  TYR*     6.2     0.2    -      -       -      +
    347D  VAL*     3.4    16.2    -      -       +      +
    348D  PHE      3.6     6.7    -      -       -      +
    350D  SER*     1.3    78.4    +      -       -      +
    352D  VAL*     1.3    59.1    +      -       +      +
    354D  ASN*     5.1     0.4    -      -       -      -
    355D  GLU*     2.9    50.3    +      -       +      +
    356D  TYR      3.7     0.7    +      -       -      -
    357D  LYS*     3.9    16.6    -      -       +      +
    358D  ARG      5.5     3.6    -      -       -      +
    359D  CYS      5.8     0.2    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 352 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    348D  PHE*     3.7    29.6    -      -       +      +
    349D  ARG*     3.1     8.9    +      -       -      +
    351D  ILE*     1.3    76.5    -      -       +      +
    353D  LEU*     1.3    62.4    +      -       -      +
    356D  TYR*     3.2    17.5    +      -       -      -
    357D  LYS      3.4    17.9    -      -       -      +
    358D  ARG*     4.7    11.9    -      -       +      -
    359D  CYS      5.6     0.7    -      -       -      +
    364D  LEU*     4.3     6.5    -      -       +      -
    514D  VAL*     4.3    16.6    -      -       +      -
    528D  ARG*     3.2    33.0    +      -       +      -
    530D  LEU*     4.0    20.4    -      -       +      -
    537D  GLU*     5.5     0.7    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 353 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    346D  GLU*     6.0     1.6    -      -       -      +
    349D  ARG*     3.0    26.3    +      -       +      +
    350D  SER*     3.7     7.6    -      -       -      +
    352D  VAL*     1.3    78.7    -      -       -      +
    354D  ASN*     1.3    68.3    +      -       -      +
    356D  TYR*     3.7     2.4    -      -       -      -
    514D  VAL*     3.9    24.0    -      -       +      +
    515D  THR      3.9    22.9    -      -       -      +
    516D  LYS*     4.2    24.2    -      -       +      +
    526D  ASP*     4.3     7.6    -      -       -      +
    527D  TYR*     4.5     6.1    -      -       -      +
    528D  ARG*     2.1    60.5    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASN 354 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    350D  SER*     2.8    38.3    +      -       -      +
    353D  LEU*     1.3    80.7    -      -       -      +
    355D  GLU*     1.3    69.1    +      -       +      +
    356D  TYR*     3.7     9.2    -      -       -      -
    516D  LYS*     5.8     1.6    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 355 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    296D  TYR*     2.6    38.1    +      -       -      -
    300D  THR*     5.0     3.6    -      -       -      +
    302D  TYR*     5.4     2.6    +      -       -      -
    351D  ILE*     2.9    28.1    +      -       +      +
    354D  ASN*     1.3    87.2    -      -       +      +
    356D  TYR*     1.3    74.3    +      -       -      +
    357D  LYS*     2.9    20.2    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with TYR 356 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    352D  VAL      3.2    16.1    +      -       -      -
    353D  LEU      3.7     4.7    -      -       -      -
    354D  ASN      4.2     8.3    -      -       -      -
    355D  GLU*     1.3    81.0    -      -       -      +
    357D  LYS*     1.3    60.5    +      -       -      +
    363D  ASP*     4.2    11.6    -      -       -      +
    364D  LEU*     4.0    30.0    +      -       +      +
    526D  ASP*     4.5     0.9    +      -       -      -
    528D  ARG*     3.0    53.0    +      -       -      -
----------------------------------------------------------
 Back to top of page


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