Contacts of the helix formed by residues 329 - 355 (chain G) in PDB entry 1SMK


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 ASN 329 (chain G).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    229G  LEU*     5.3     2.2    -      -       -      +
    230G  SER*     3.7    17.9    +      -       -      +
    243G  ILE*     4.9    14.5    -      -       -      +
    328G  LEU*     1.3    70.0    -      -       -      +
    330G  GLU*     1.3    65.7    +      -       -      +
    331G  TYR*     3.0    13.5    +      -       -      +
    332G  GLU*     2.8    49.8    +      -       -      +
    333G  ARG*     2.9    29.2    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 330 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    329G  ASN*     1.3    73.0    -      -       -      +
    331G  TYR*     1.3    55.9    +      -       -      +
    332G  GLU      2.7     2.1    +      -       -      -
    333G  ARG*     2.7    54.2    +      -       -      +
    334G  ILE*     2.8    41.7    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with TYR 331 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    226G  LEU*     5.0     1.5    -      -       +      +
    240G  GLN*     5.1    15.3    -      -       +      -
    243G  ILE*     3.2    32.1    -      -       +      -
    244G  SER*     3.1    38.7    +      -       -      -
    247G  THR*     3.1    37.2    -      -       +      +
    248G  ASP      5.2     0.2    +      -       -      -
    329G  ASN*     3.0    11.5    +      -       -      +
    330G  GLU*     1.3    78.2    -      -       -      +
    332G  GLU*     1.3    60.6    +      -       +      +
    334G  ILE*     4.2    10.7    -      -       +      +
    335G  GLY*     3.1    21.2    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 332 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    226G  LEU*     3.6    11.8    -      -       +      +
    227G  PRO      3.7     4.9    -      -       -      +
    228G  LEU*     2.9    18.9    -      -       +      -
    229G  LEU*     2.7    34.6    +      -       +      +
    230G  SER*     2.8    24.2    +      -       -      -
    243G  ILE*     6.2     0.4    -      -       +      -
    328G  LEU*     3.5    20.3    -      -       +      +
    329G  ASN*     2.8    41.7    +      -       -      +
    330G  GLU      2.7     0.4    +      -       -      -
    331G  TYR*     1.3    84.7    -      -       +      +
    333G  ARG*     1.3    59.5    +      -       -      +
    334G  ILE      3.2     1.1    -      -       -      -
    335G  GLY      3.6     1.1    -      -       -      +
    336G  LEU*     2.8    29.6    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 333 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    328G  LEU*     3.3    30.9    +      -       +      -
    329G  ASN*     2.9    18.1    +      -       -      +
    330G  GLU*     2.7    61.3    +      -       -      +
    332G  GLU*     1.3    72.8    -      -       -      +
    334G  ILE*     1.3    61.2    +      -       +      +
    336G  LEU*     3.7     7.0    -      -       -      +
    337G  GLU*     3.1    29.1    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 334 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    330G  GLU*     2.8    48.1    +      -       +      +
    331G  TYR*     4.2     9.9    -      -       +      +
    333G  ARG*     1.3    77.2    -      -       +      +
    335G  GLY*     1.3    63.3    +      -       -      +
    336G  LEU      3.1     0.7    +      -       -      -
    337G  GLU*     3.6     5.2    +      -       -      +
    338G  LYS*     3.4    34.1    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 335 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    223G  VAL      4.1     5.5    -      -       -      +
    226G  LEU*     4.0    16.1    -      -       -      +
    331G  TYR*     3.1    21.1    +      -       -      -
    332G  GLU      3.5     1.8    +      -       -      -
    334G  ILE*     1.3    80.2    -      -       -      +
    336G  LEU*     1.3    54.9    +      -       -      +
    338G  LYS*     3.8     5.2    +      -       -      +
    339G  ALA*     3.2    25.6    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 336 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    226G  LEU*     3.4    18.8    -      -       +      +
    308G  PHE*     3.6    31.9    -      -       +      -
    325G  LEU*     3.8    17.7    -      -       +      -
    328G  LEU*     3.7    25.8    -      -       +      -
    332G  GLU      2.8    18.3    +      -       -      +
    333G  ARG*     3.7     6.1    -      -       -      +
    335G  GLY*     1.3    74.2    -      -       -      +
    337G  GLU*     1.3    68.6    +      -       -      +
    338G  LYS      3.0     1.8    -      -       -      -
    339G  ALA*     2.9    14.9    +      -       +      +
    340G  LYS*     3.1    36.3    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 337 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    333G  ARG      3.1    14.7    +      -       -      +
    334G  ILE*     3.6     6.0    +      -       -      +
    336G  LEU*     1.3    81.1    -      -       -      +
    338G  LYS*     1.3    59.9    +      -       +      +
    340G  LYS*     3.8    23.5    +      -       -      +
    341G  LYS*     3.0    49.4    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 338 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    223G  VAL*     4.8    20.4    -      -       +      +
    334G  ILE*     3.4    25.4    +      -       +      +
    335G  GLY*     4.0     5.2    -      -       -      +
    336G  LEU      3.0     0.8    -      -       -      -
    337G  GLU*     1.3    76.8    -      -       +      +
    339G  ALA*     1.3    65.9    +      -       -      +
    341G  LYS*     3.2    38.3    +      -       -      +
    342G  GLU*     3.2    14.6    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 339 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    218G  GLY*     5.1     5.2    -      -       -      -
    223G  VAL*     3.4    25.5    +      -       -      +
    224G  THR*     3.9    22.3    -      -       -      +
    226G  LEU*     4.9     5.2    -      -       +      -
    308G  PHE*     5.3     0.9    -      -       +      -
    335G  GLY      3.2    11.6    +      -       -      +
    336G  LEU*     2.9    18.1    +      -       +      +
    338G  LYS*     1.3    78.7    -      -       -      +
    340G  LYS*     1.3    56.7    +      -       +      +
    342G  GLU*     3.5     1.2    +      -       -      -
    343G  LEU*     2.9    32.2    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 340 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    303G  THR*     4.0    21.8    +      -       +      +
    304G  GLU*     3.7    27.7    +      -       -      +
    305G  LEU*     4.1    13.0    -      -       +      +
    308G  PHE*     4.4    10.3    -      -       +      -
    325G  LEU*     5.8     0.4    -      -       -      -
    336G  LEU*     3.1    44.8    +      -       +      +
    337G  GLU*     3.8    25.9    +      -       -      +
    339G  ALA*     1.3    77.6    -      -       -      +
    341G  LYS*     1.3    65.3    +      -       +      +
    343G  LEU*     2.8    17.8    +      -       -      +
    344G  ALA*     2.8    17.6    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 341 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    337G  GLU*     3.0    41.3    -      -       -      +
    338G  LYS*     3.2    35.7    +      -       +      +
    340G  LYS*     1.3    78.8    -      -       +      +
    342G  GLU*     1.3    61.6    +      -       -      +
    344G  ALA*     3.6    11.0    +      -       -      +
    345G  GLY*     3.8     6.1    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 342 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    221G  ALA*     3.6    12.5    -      -       -      +
    222G  GLY*     4.9     0.7    -      -       -      -
    223G  VAL*     3.2    26.1    +      -       +      +
    224G  THR*     3.2    21.3    -      -       +      +
    338G  LYS      3.2     8.4    +      -       -      +
    339G  ALA      4.0     5.4    -      -       -      +
    341G  LYS*     1.3    79.9    -      -       -      +
    343G  LEU*     1.3    62.6    +      -       -      +
    345G  GLY*     3.3    10.3    +      -       -      -
    346G  SER*     3.5    15.1    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 343 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    165G  ASN*     3.5    36.6    -      -       +      +
    218G  GLY      4.0    13.0    -      -       -      +
    219G  GLY*     4.1     5.4    -      -       -      +
    224G  THR*     4.5     6.5    -      -       +      -
    297G  PHE*     4.0    12.1    -      -       +      -
    305G  LEU*     3.5    13.5    -      -       +      -
    307G  PHE      3.9     7.9    -      -       -      +
    308G  PHE*     3.3    38.4    -      -       +      -
    339G  ALA      2.9    17.7    +      -       -      +
    340G  LYS      2.8     6.0    +      -       -      +
    342G  GLU*     1.3    73.3    -      -       -      +
    344G  ALA*     1.3    66.2    +      -       -      +
    345G  GLY      3.0     1.8    -      -       -      -
    346G  SER*     3.0     5.3    +      -       -      +
    347G  ILE*     2.9    29.1    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 344 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    305G  LEU*     4.0    20.1    -      -       +      +
    340G  LYS      2.8    18.1    +      -       -      +
    341G  LYS*     3.9     7.0    -      -       -      +
    343G  LEU*     1.3    73.1    -      -       -      +
    345G  GLY*     1.3    57.4    +      -       -      +
    347G  ILE*     3.9     6.6    -      -       -      +
    348G  GLU*     3.1    27.9    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 345 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    341G  LYS      3.8     4.9    +      -       -      -
    342G  GLU*     3.3     7.9    +      -       -      -
    343G  LEU      3.0     1.2    -      -       -      -
    344G  ALA*     1.3    77.6    -      -       -      +
    346G  SER*     1.3    54.4    +      -       -      +
    348G  GLU*     3.1     6.4    +      -       -      +
    349G  LYS*     2.6    36.9    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 346 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    165G  ASN*     3.5    28.2    +      -       -      +
    166G  SER*     2.9    30.0    +      -       -      -
    224G  THR*     5.5     1.4    -      -       -      +
    342G  GLU*     3.5    15.5    +      -       -      +
    343G  LEU*     3.0    10.7    +      -       -      -
    345G  GLY*     1.3    74.1    -      -       -      +
    347G  ILE*     1.3    66.2    +      -       -      +
    349G  LYS*     3.0     7.5    +      -       -      +
    350G  GLY      2.9    15.6    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 347 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    165G  ASN      3.7    12.3    +      -       -      +
    169G  PRO*     4.0    10.7    -      -       +      +
    297G  PHE*     4.5     2.2    -      -       +      -
    305G  LEU*     3.9    17.7    -      -       +      -
    306G  PRO*     3.4    40.4    -      -       +      -
    307G  PHE*     3.5    37.0    -      -       +      +
    343G  LEU*     2.9    23.3    +      -       +      +
    344G  ALA*     3.9     5.6    -      -       -      +
    346G  SER*     1.3    75.1    -      -       -      +
    348G  GLU*     1.3    58.9    +      -       -      +
    350G  GLY*     3.3     1.2    +      -       -      -
    351G  VAL*     3.0    38.7    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 348 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    344G  ALA      3.1    19.8    +      -       -      +
    345G  GLY*     3.3     7.6    -      -       -      +
    346G  SER      3.1     0.6    -      -       -      -
    347G  ILE*     1.3    73.8    -      -       -      +
    349G  LYS*     1.3    64.8    +      -       -      +
    350G  GLY      2.9     6.6    +      -       -      -
    351G  VAL*     4.6     7.3    -      -       -      +
    352G  SER*     3.0    45.9    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 349 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    130G  ARG      4.7     4.0    +      -       -      -
    131G  ASP*     3.3    36.5    +      -       -      +
    134G  PHE*     3.3    45.3    -      -       +      +
    166G  SER*     4.3     5.8    -      -       -      +
    345G  GLY      2.6    20.3    +      -       -      +
    346G  SER*     3.4    10.3    -      -       -      +
    348G  GLU*     1.3    74.5    -      -       -      +
    350G  GLY*     1.3    60.5    +      -       -      +
    352G  SER*     4.0     4.9    -      -       -      -
    353G  PHE*     3.7     8.8    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 350 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    134G  PHE*     4.3     4.0    -      -       -      -
    166G  SER*     3.9     9.6    -      -       -      -
    170G  ILE*     3.7    29.7    -      -       -      +
    346G  SER      2.9    11.4    +      -       -      -
    347G  ILE      3.7     2.7    -      -       -      -
    348G  GLU      2.9     1.8    -      -       -      -
    349G  LYS*     1.3    75.7    -      -       -      +
    351G  VAL*     1.3    65.1    +      -       -      +
    352G  SER      2.9     3.4    +      -       -      -
    353G  PHE*     2.9    19.2    +      -       -      +
    354G  ILE*     3.5     4.3    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 351 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    169G  PRO*     4.0    17.0    -      -       +      +
    173G  GLU*     3.6    28.5    -      -       +      +
    306G  PRO*     5.9     0.9    -      -       +      -
    307G  PHE*     5.2     4.5    -      -       +      -
    347G  ILE*     3.0    28.9    +      -       +      +
    348G  GLU*     4.3     8.1    -      -       -      +
    350G  GLY*     1.3    70.9    -      -       -      +
    352G  SER*     1.3    62.8    +      -       -      +
    354G  ILE*     3.4     2.1    +      -       -      +
    355G  ARG*     3.1    49.3    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 352 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    348G  GLU*     3.0    35.3    +      -       -      -
    349G  LYS*     4.0     6.7    -      -       -      -
    350G  GLY      2.9     1.0    +      -       -      -
    351G  VAL*     1.3    79.6    -      -       -      +
    353G  PHE*     1.3    65.0    +      -       -      -
    354G  ILE      2.8     2.3    +      -       -      -
    355G  ARG*     3.1     9.7    +      -       -      -
    356G  SER*     3.2    25.6    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE 353 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    134G  PHE*     4.2    15.5    -      +       +      -
    135G  LYS*     5.0     4.9    -      -       +      -
    138G  ALA*     3.3    44.0    -      -       +      -
    139G  GLY*     4.1    12.1    -      -       -      -
    142G  LYS*     4.5    10.1    -      -       +      -
    170G  ILE*     4.3     9.0    -      -       +      -
    349G  LYS      3.7    10.4    +      -       -      +
    350G  GLY      2.9     9.9    +      -       -      +
    352G  SER*     1.3    79.2    +      -       -      +
    354G  ILE*     1.3    77.1    +      -       +      +
    356G  SER*     4.4     9.3    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 354 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    142G  LYS*     4.3    15.7    -      -       +      -
    170G  ILE*     3.4    46.9    -      -       +      +
    173G  GLU*     3.4    34.8    -      -       +      +
    174G  VAL*     3.6    16.4    -      -       +      +
    177G  LYS*     5.0    19.6    +      -       +      -
    350G  GLY      4.3     2.7    -      -       -      +
    351G  VAL      3.4     3.7    +      -       -      +
    352G  SER      2.8     4.6    +      -       -      -
    353G  PHE*     1.3    83.4    -      -       +      +
    355G  ARG*     1.3    61.6    +      -       +      +
    356G  SER      2.8    19.0    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 355 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    173G  GLU*     2.8    32.9    +      -       +      +
    176G  LYS*     4.4    12.5    -      -       -      +
    177G  LYS*     6.1     1.3    -      -       -      +
    351G  VAL*     3.1    29.3    +      -       -      +
    352G  SER*     3.6     1.6    -      -       -      +
    354G  ILE*     1.3    76.4    -      -       +      +
    356G  SER*     1.3    64.9    +      -       -      +
----------------------------------------------------------
 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