Contacts of the helix formed by residues 45 - 69 (chain E) in PDB entry 1JT6


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 THR 45 (chain E).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     39E  LEU*     5.3     2.2    -      -       -      -
     40E  TYR*     4.5     4.0    -      -       -      -
     43E  PHE*     4.0     4.3    -      -       -      +
     44E  LYS*     1.3    95.2    -      -       +      +
     46E  LYS*     1.3    65.1    +      -       -      +
     47E  GLU*     3.1    21.6    +      -       -      +
     48E  ASN*     3.0    22.4    +      -       -      +
     49E  LEU*     2.9    23.3    +      -       -      +
    249E  SO4      3.3    13.7    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 46 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     15E  PHE*     4.1    14.7    -      -       +      -
     20E  TYR*     3.3    50.2    +      -       +      +
     21E  ASN*     4.0     8.1    +      -       -      +
     23E  THR*     2.6    30.6    +      -       -      -
     24E  THR*     4.6     4.4    -      -       -      +
     25E  THR*     5.2    11.9    -      -       -      +
     28E  ILE*     5.6     4.0    -      -       +      -
     39E  LEU*     5.6     1.6    -      -       -      -
     40E  TYR*     4.8     0.8    -      -       -      -
     45E  THR*     1.3    73.3    -      -       -      +
     47E  GLU*     1.3    57.3    +      -       -      +
     49E  LEU*     3.1    12.6    +      -       +      +
     50E  PHE*     2.8    27.2    +      -       -      +
    249E  SO4      2.7    36.8    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 47 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     20E  TYR*     3.4    17.4    +      -       -      +
     45E  THR*     3.1    19.4    +      -       -      +
     46E  LYS*     1.3    81.6    -      -       -      +
     48E  ASN*     1.3    80.9    +      -       -      +
     50E  PHE*     3.2     3.2    +      -       -      +
     51E  LEU*     3.0    27.8    +      -       +      +
    102E  PHE*     3.8    15.6    -      -       +      -
    106E  TYR*     3.9    19.0    +      -       +      +
    112E  ILE*     3.2    40.0    -      -       +      +
    249E  SO4      5.0     0.4    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ASN 48 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     42E  HIS      5.1     0.4    +      -       -      -
     43E  PHE*     3.9     8.1    -      -       -      +
     44E  LYS*     3.6    39.1    +      -       +      +
     45E  THR*     3.0    25.7    +      -       -      +
     47E  GLU*     1.3    84.5    +      -       -      +
     49E  LEU*     1.3    67.4    +      -       -      +
     51E  LEU*     3.3    12.2    +      -       -      +
     52E  GLU*     3.0    41.8    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 49 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      7E  ILE*     4.2    15.3    -      -       +      -
      8E  LEU*     3.8    15.7    -      -       +      -
     11E  ALA*     3.9    14.1    -      -       +      -
     15E  PHE*     4.7     3.8    -      -       +      -
     28E  ILE*     3.8    28.7    -      -       +      -
     39E  LEU*     4.4    11.7    -      -       +      -
     43E  PHE*     3.5    44.8    -      -       +      +
     45E  THR      2.9    12.6    +      -       -      +
     46E  LYS*     3.2    13.2    -      -       -      +
     48E  ASN*     1.3    77.0    -      -       -      +
     50E  PHE*     1.3    63.9    +      -       -      +
     52E  GLU*     3.2     2.9    +      -       -      +
     53E  ILE*     3.1    25.0    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE 50 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     15E  PHE*     3.5    37.9    -      +       +      -
     20E  TYR*     3.8    17.5    -      +       +      -
     46E  LYS      2.8    13.3    +      -       -      +
     47E  GLU      3.6     7.9    -      -       -      +
     48E  ASN      3.2     0.2    -      -       -      -
     49E  LEU*     1.3    77.4    -      -       -      +
     51E  LEU*     1.3    56.1    +      -       -      +
     53E  ILE*     3.3     7.2    +      -       +      +
     54E  LEU*     3.0    61.0    +      -       +      +
     95E  LEU*     4.6     5.6    -      -       +      -
     98E  ALA*     3.7    38.4    -      -       +      -
     99E  ILE*     4.0     6.7    -      -       +      -
    102E  PHE*     3.4    44.4    -      +       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 51 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     47E  GLU*     3.0    29.5    +      -       -      +
     48E  ASN*     3.5    12.8    -      -       -      +
     50E  PHE*     1.3    75.5    -      -       -      +
     52E  GLU*     1.3    59.8    +      -       -      +
     54E  LEU*     3.3    11.0    +      -       +      +
     55E  ASN*     2.9    39.0    +      -       -      +
    102E  PHE*     3.7    27.6    -      -       +      -
    112E  ILE*     4.3    19.3    -      -       +      +
    115E  LYS*     4.7    22.4    -      -       +      -
    116E  MET*     4.2    13.9    -      -       +      +
    119E  LEU*     5.1     6.5    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 52 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      4E  LYS*     4.3    11.8    -      -       -      +
      8E  LEU*     4.5    10.3    -      -       +      -
     42E  HIS      4.3     3.4    -      -       -      +
     43E  PHE*     2.8    39.5    -      -       +      -
     48E  ASN*     3.0    29.0    +      -       -      +
     49E  LEU      3.7     7.4    -      -       -      +
     51E  LEU*     1.3    72.3    -      -       -      +
     53E  ILE*     1.3    66.7    +      -       -      +
     55E  ASN*     3.2     7.8    +      -       +      +
     56E  ILE*     3.0    34.5    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 53 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8E  LEU*     3.5    24.9    -      -       +      +
     11E  ALA*     3.7    16.8    -      -       +      -
     12E  LYS*     3.6    32.3    -      -       +      +
     15E  PHE*     3.7    20.6    -      -       +      -
     49E  LEU*     3.1    15.8    +      -       +      +
     50E  PHE*     3.5     8.5    -      -       +      +
     52E  GLU*     1.3    75.4    -      -       -      +
     54E  LEU*     1.3    60.7    +      -       +      +
     56E  ILE*     3.2     4.1    +      -       -      +
     57E  GLU*     3.0    28.1    +      -       +      +
     95E  LEU*     4.1    25.4    -      -       +      -
    399E  SO4      3.7    16.6    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 54 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     50E  PHE*     3.0    53.1    +      -       +      +
     51E  LEU*     3.6    12.3    -      -       +      +
     52E  GLU      3.2     0.4    -      -       -      -
     53E  ILE*     1.3    77.1    -      -       +      +
     55E  ASN*     1.3    65.3    +      -       -      +
     57E  GLU*     3.4     5.4    +      -       +      +
     58E  GLU*     3.1    24.6    +      -       -      +
     92E  TYR*     6.1     1.8    -      -       +      -
     95E  LEU*     4.1    18.2    -      -       +      -
     99E  ILE*     3.9    25.1    -      -       +      -
    116E  MET*     3.4    33.0    -      -       +      -
    119E  LEU*     3.8    17.5    -      -       +      +
    123E  TYR*     4.3     4.5    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASN 55 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     51E  LEU*     2.9    27.2    +      -       -      +
     52E  GLU*     3.2     8.7    +      -       +      +
     54E  LEU*     1.3    77.3    -      -       -      +
     56E  ILE*     1.3    64.8    +      -       +      +
     58E  GLU*     3.6     5.3    +      -       -      +
     59E  SER*     3.3    21.5    +      -       -      -
    115E  LYS*     6.1     0.9    -      -       -      +
    119E  LEU*     4.1    25.7    -      -       -      +
    122E  LYS*     6.2     0.4    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 56 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8E  LEU*     4.0    22.2    -      -       +      -
     52E  GLU*     3.0    20.4    +      -       +      +
     53E  ILE      3.6     6.3    -      -       -      +
     54E  LEU      3.1     0.2    -      -       -      -
     55E  ASN*     1.3    75.9    -      -       +      +
     57E  GLU*     1.3    66.6    +      -       -      +
     59E  SER*     3.0     7.4    +      -       -      +
     60E  LYS*     2.9    39.4    +      -       +      +
    399E  SO4      3.4    41.1    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 57 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     12E  LYS*     2.8    44.3    +      -       -      +
     53E  ILE*     3.0    22.3    +      -       +      +
     54E  LEU*     3.9     6.7    -      -       +      +
     56E  ILE*     1.3    76.5    -      -       -      +
     58E  GLU*     1.3    58.0    +      -       -      +
     60E  LYS*     3.2     5.2    +      -       -      +
     61E  TRP*     2.8    30.7    +      -       -      +
     90E  GLU      3.6     1.4    -      -       -      +
     91E  TYR*     3.2    19.4    -      -       -      +
     92E  TYR*     3.0    32.6    +      -       +      +
     94E  PRO*     5.2     0.5    -      -       -      +
     95E  LEU*     3.8    23.5    -      -       +      +
    123E  TYR*     3.7     5.8    -      -       -      +
    399E  SO4      3.5    11.8    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 58 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     54E  LEU      3.1    12.6    +      -       -      +
     55E  ASN*     4.0     7.6    -      -       -      +
     57E  GLU*     1.3    75.4    -      -       -      +
     59E  SER*     1.3    68.1    +      -       -      +
     61E  TRP*     3.7     2.1    -      -       -      +
     62E  GLN*     2.6    59.1    +      -       -      +
    119E  LEU*     3.5    24.9    -      -       +      -
    122E  LYS*     3.5    34.8    +      -       +      +
    123E  TYR*     2.8    40.7    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 59 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     55E  ASN      3.3    13.0    +      -       -      -
     56E  ILE*     3.0    10.5    +      -       -      +
     58E  GLU*     1.3    87.4    -      -       -      +
     60E  LYS*     1.3    64.7    +      -       -      +
     62E  GLN*     3.8     4.9    -      -       -      +
     63E  GLU*     2.9    30.1    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 60 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    699A  SO4      3.7    29.8    +      -       -      -
     56E  ILE*     2.9    36.7    +      -       +      +
     57E  GLU      3.8     1.1    -      -       -      +
     59E  SER*     1.3    80.3    +      -       -      +
     61E  TRP*     1.3    57.6    +      -       -      +
     63E  GLU*     3.4     5.1    +      -       +      +
     64E  GLN*     2.9    30.8    +      -       -      +
     91E  TYR*     3.6    46.1    +      -       +      +
    399E  SO4      5.3     2.9    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with TRP 61 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     57E  GLU      2.8    17.5    +      -       -      +
     58E  GLU*     3.7     5.4    -      -       -      +
     60E  LYS*     1.3    75.6    -      -       -      +
     62E  GLN*     1.3    62.8    +      -       +      +
     64E  GLN*     2.9    35.7    -      -       +      -
     65E  TRP*     3.0    32.0    +      -       +      +
     82E  TYR*     3.2    47.8    +      +       -      -
     85E  LEU*     4.1    24.7    -      -       +      -
     86E  SER*     4.0    13.2    -      -       -      -
     89E  THR*     3.5    24.2    -      -       +      -
     91E  TYR*     4.1    13.6    -      -       +      -
     92E  TYR*     4.7     4.0    -      -       +      -
     93E  TYR*     3.9    15.3    -      +       -      -
    123E  TYR*     3.4    32.0    -      +       +      +
    126E  ALA*     5.6     2.0    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 62 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     58E  GLU*     2.6    57.2    +      -       -      +
     59E  SER*     3.8     5.5    -      -       -      +
     61E  TRP*     1.3    81.3    -      -       +      +
     63E  GLU*     1.3    58.6    +      -       -      +
     65E  TRP*     3.3     6.1    +      -       -      +
     66E  LYS*     2.9    31.8    +      -       +      +
    122E  LYS*     4.0    16.0    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 63 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     59E  SER      2.9    17.9    +      -       -      +
     60E  LYS*     3.7     7.2    -      -       +      +
     62E  GLN*     1.3    74.7    -      -       -      +
     64E  GLN*     1.3    65.7    +      -       -      +
     66E  LYS*     3.2    33.1    +      -       -      +
     67E  LYS*     3.2    37.9    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 64 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     60E  LYS      2.9    17.9    +      -       -      +
     61E  TRP*     2.9    29.9    -      -       +      +
     63E  GLU*     1.3    77.1    -      -       -      +
     65E  TRP*     1.3    57.7    +      -       -      +
     67E  LYS*     3.1     9.3    +      -       -      +
     68E  GLU*     3.0    34.8    +      -       -      +
     85E  LEU*     5.3     8.0    -      -       +      +
     89E  THR*     2.4    37.1    +      -       -      -
     90E  GLU*     5.2     2.3    +      -       -      +
     91E  TYR*     3.8    17.1    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with TRP 65 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     61E  TRP*     3.0    26.1    +      -       +      +
     62E  GLN*     3.9     4.9    -      -       -      +
     64E  GLN*     1.3    75.4    -      -       -      +
     66E  LYS*     1.3    67.3    +      -       -      +
     68E  GLU*     4.3     1.1    -      -       -      +
     69E  GLN*     3.0    72.3    +      -       +      +
     78E  LYS*     3.1    33.9    -      -       +      -
     81E  LEU*     4.2     7.4    -      -       +      -
     82E  TYR*     3.4    54.4    -      +       +      -
     85E  LEU*     3.6    23.8    -      -       +      -
    126E  ALA*     4.2    17.7    +      -       +      +
    130E  ILE*     3.9    17.2    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 66 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     62E  GLN*     2.9    18.8    +      -       +      +
     63E  GLU*     3.4    24.8    +      -       -      +
     65E  TRP*     1.3    77.8    -      -       -      +
     67E  LYS*     1.3    61.5    +      -       +      +
     69E  GLN*     3.9    12.2    -      -       -      +
     70E  ILE*     3.9    19.9    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 67 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63E  GLU*     3.2    35.3    +      -       +      +
     64E  GLN*     3.1    10.6    +      -       -      +
     65E  TRP      3.1     0.4    -      -       -      -
     66E  LYS*     1.3    81.7    -      -       +      +
     68E  GLU*     1.3    63.6    +      -       -      +
     69E  GLN      3.5     0.2    -      -       -      -
     70E  ILE*     3.9    15.3    +      -       -      +
     71E  LYS*     4.5     8.8    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 68 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     64E  GLN*     3.0    22.4    +      -       -      +
     65E  TRP*     3.3     2.9    +      -       +      +
     67E  LYS*     1.3    78.4    -      -       -      +
     69E  GLN*     1.3    64.7    +      -       -      +
     70E  ILE      3.1     2.9    -      -       -      -
     71E  LYS*     2.8    58.2    +      -       -      +
     81E  LEU*     3.5    14.7    -      -       +      +
     85E  LEU*     3.3    43.0    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 69 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65E  TRP*     3.0    69.5    +      -       +      +
     66E  LYS*     3.9     9.2    -      -       -      +
     68E  GLU*     1.3    75.4    -      -       -      +
     70E  ILE*     1.3    81.3    +      -       +      +
     71E  LYS      3.0     0.2    -      -       -      -
     72E  ALA*     3.1    22.2    +      -       -      +
     78E  LYS*     3.4    29.5    -      -       -      +
     81E  LEU*     4.6     1.8    -      -       -      -
    129E  VAL*     5.5     9.7    -      -       -      +
----------------------------------------------------------
 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