Contacts of the helix formed by residues 159 - 180 (chain A) in PDB entry 3J41


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

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

Legend:
Dist - nearest distance (Å) between atoms of two residues
Surf - contact surface area (Å2) between two residues
HB   - hydrophilic-hydrophilic contact (hydrogen bond)
Arom - aromatic-aromatic contact
Phob - hydrophobic-hydrophobic contact
DC   - hydrophobic-hydrophilic contact (destabilizing contact)
+/-  - indicates presence/absence of a specific contacts
*    - indicates residues forming contacts  by their side chain
       (including CA atoms)
Residues in contact with SER 159 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     57A  GLN*     3.6     5.0    +      -       -      +
    157A  LEU      3.7     4.2    +      -       -      +
    158A  GLY*     1.3    70.3    -      -       -      -
    160A  VAL*     1.3    61.3    +      -       -      +
    161A  ALA*     3.3    11.8    +      -       -      +
    162A  LEU*     3.1    32.1    +      -       -      +
    163A  ALA*     3.2    18.9    +      -       -      +
     57B  GLN*     4.7     0.2    +      -       -      -
    159B  SER*     4.7     3.9    -      -       -      -
    156D  ARG      3.5     6.7    -      -       -      -
    157D  LEU      3.0    21.8    +      -       -      -
    158D  GLY*     3.4     7.4    -      -       -      -
    159D  SER      4.7     3.4    -      -       -      -
    163D  ALA*     6.5     0.2    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 160 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     56A  VAL*     4.6     5.8    -      -       +      -
    148A  THR*     3.6    33.2    -      -       -      +
    149A  TYR*     4.2    23.8    -      -       +      -
    157A  LEU*     4.2    11.9    -      -       +      -
    158A  GLY      4.3     2.5    -      -       -      +
    159A  SER*     1.3    71.7    -      -       -      +
    161A  ALA*     1.3    64.4    +      -       -      +
    163A  ALA*     3.6     7.5    -      -       -      +
    164A  VAL*     3.0    35.7    +      -       -      +
     57B  GLN*     5.3     1.1    -      -       -      +
    154D  ASN*     5.7     4.3    -      -       -      +
    156D  ARG*     3.3    38.8    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 161 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     53A  ALA*     3.1    36.4    -      -       -      +
     56A  VAL*     3.6    26.1    -      -       +      +
     57A  GLN*     3.4    29.8    -      -       +      +
    159A  SER*     3.5     0.7    -      -       -      +
    160A  VAL*     1.3    82.6    -      -       +      +
    162A  LEU*     1.3    57.7    +      -       -      +
    164A  VAL*     3.6     2.9    +      -       -      +
    165A  GLY      2.9    21.8    +      -       -      -
    156D  ARG      4.9     0.6    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 162 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     50A  LEU*     4.3     3.1    -      -       +      -
     53A  ALA*     3.8    16.4    -      -       +      +
    159A  SER*     3.1    25.5    +      -       -      +
    161A  ALA*     1.3    75.0    -      -       -      +
    163A  ALA*     1.3    55.6    +      -       -      +
    166A  PHE*     2.7    83.7    +      -       +      +
    162B  LEU*     3.9    18.2    -      -       +      -
    162D  LEU*     3.9    26.5    -      -       +      -
    163D  ALA*     6.3     2.2    -      -       -      +
    166D  PHE*     3.9    19.7    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 163 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    144A  CYS*     3.9     6.6    -      -       -      -
    148A  THR*     4.1    12.3    -      -       +      -
    159A  SER      3.2    11.9    +      -       -      +
    160A  VAL*     3.6     8.1    -      -       -      +
    162A  LEU*     1.3    80.1    -      -       -      +
    164A  VAL*     1.3    57.5    +      -       -      +
    166A  PHE*     3.3     6.7    +      -       -      +
    167A  SER*     2.9    28.2    +      -       -      -
     54B  THR*     4.7     3.5    +      -       -      +
     57B  GLN*     3.8    34.1    -      -       +      +
    162B  LEU*     6.3     1.8    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 164 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     52A  LEU*     3.6    26.7    -      -       +      -
     56A  VAL*     4.5     8.5    -      -       +      -
    141A  PHE*     3.5    15.4    -      -       +      -
    144A  CYS*     4.4     3.8    -      -       -      +
    145A  ILE*     3.9    25.1    -      -       +      +
    148A  THR*     3.6    21.1    -      -       -      +
    149A  TYR*     4.1    14.8    -      -       +      +
    160A  VAL      3.0    21.8    +      -       -      +
    161A  ALA*     3.8     4.7    -      -       -      +
    163A  ALA*     1.3    73.7    -      -       -      +
    165A  GLY*     1.3    64.6    +      -       -      +
    167A  SER*     3.1    10.4    +      -       -      -
    168A  LEU      3.0    17.8    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 165 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     49A  GLY*     3.1    37.8    -      -       -      -
     52A  LEU*     4.2     7.2    -      -       -      +
     53A  ALA*     4.1     6.1    -      -       -      -
    161A  ALA      2.9    16.6    +      -       -      -
    162A  LEU      3.5     2.7    -      -       -      -
    164A  VAL*     1.3    77.7    -      -       -      +
    166A  PHE*     1.3    57.5    +      -       -      +
    168A  LEU*     3.0     3.1    +      -       -      +
    169A  THR      2.9    22.0    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE 166 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46A  LEU*     4.2    20.2    -      -       +      -
     50A  LEU*     4.3     9.9    -      -       +      -
    162A  LEU*     2.7    57.9    +      -       +      +
    163A  ALA*     3.8     5.6    -      -       -      +
    165A  GLY*     1.3    69.6    -      -       -      -
    167A  SER*     1.3    60.7    -      -       -      +
    169A  THR*     3.4    10.7    -      -       -      -
    170A  LEU*     2.9    27.7    +      -       -      +
     50B  LEU*     3.7    38.5    -      -       +      +
     53B  ALA*     6.1     2.7    -      -       +      -
     54B  THR*     4.4     4.5    -      -       -      +
    162B  LEU*     3.9    27.4    -      -       +      -
    166B  PHE*     4.1    15.0    -      +       -      -
    166D  PHE*     4.1    15.9    -      +       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 167 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    140A  GLN*     2.6    40.5    +      -       -      +
    141A  PHE*     3.3    20.5    -      -       -      -
    144A  CYS*     4.0    12.8    -      -       -      -
    163A  ALA      2.9    14.4    +      -       -      -
    164A  VAL      3.1    11.4    +      -       -      -
    166A  PHE*     1.3    75.2    -      -       -      +
    168A  LEU*     1.3    58.6    +      -       -      +
    170A  LEU*     3.2     3.5    +      -       -      +
    171A  GLY      3.0    23.0    +      -       -      -
     54B  THR*     3.6    16.1    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 168 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     23A  TYR*     3.2    30.3    -      -       +      +
     45A  ALA      4.9     0.2    -      -       -      -
     48A  PHE*     3.5    29.2    -      -       +      +
     49A  GLY*     4.3     0.4    -      -       -      -
     52A  LEU*     3.5    20.6    -      -       +      -
    141A  PHE*     3.9    17.4    -      -       +      -
    164A  VAL      3.0    12.2    +      -       -      +
    165A  GLY      3.3     9.2    -      -       -      +
    167A  SER*     1.3    76.7    -      -       -      +
    169A  THR*     1.3    57.7    +      -       -      +
    171A  GLY*     3.1     2.9    +      -       -      -
    172A  HIS*     2.8    51.8    +      -       +      -
    183A  MET*     3.6    31.6    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with THR 169 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     42A  LEU*     6.2     0.2    -      -       +      -
     45A  ALA*     2.8    40.7    +      -       +      +
     46A  LEU*     3.9    17.6    -      -       +      +
     49A  GLY*     3.2    15.9    -      -       -      -
    165A  GLY      2.9     8.4    +      -       -      -
    166A  PHE*     3.4    18.7    -      -       -      -
    167A  SER      3.2     0.2    -      -       -      -
    168A  LEU*     1.3    75.5    -      -       -      +
    170A  LEU*     1.3    52.5    +      -       -      +
    172A  HIS*     3.1     4.0    +      -       -      +
    173A  LEU*     2.8    41.5    +      -       +      +
     50B  LEU*     3.7    19.3    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 170 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    140A  GLN*     4.0    23.6    -      -       +      +
    166A  PHE      2.9    14.0    +      -       -      +
    167A  SER*     3.3     9.9    -      -       -      +
    169A  THR*     1.3    77.1    -      -       -      +
    171A  GLY*     1.3    62.5    +      -       -      +
    173A  LEU*     3.2     8.4    +      -       +      +
    174A  PHE*     3.1    22.3    +      -       +      +
     26B  PHE*     4.0    39.0    -      -       +      +
     47B  ALA*     3.6    32.3    -      -       +      +
     50B  LEU*     4.0     6.3    -      -       +      +
     51B  ALA*     3.8    29.4    -      -       +      +
     54B  THR*     4.6     3.8    -      -       +      +
     55B  LEU*     6.5     0.4    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 171 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    137A  LEU*     3.5    16.3    -      -       -      +
    140A  GLN*     3.8    12.2    +      -       -      -
    167A  SER      3.0    11.1    +      -       -      -
    168A  LEU      3.1     5.3    +      -       -      -
    170A  LEU*     1.3    76.2    -      -       -      +
    172A  HIS*     1.3    52.5    +      -       -      +
    175A  GLY*     2.8    32.9    +      -       -      -
    181A  ALA*     4.0     2.3    -      -       -      +
    183A  MET*     3.7    21.1    -      -       -      -
     26B  PHE*     4.9     2.0    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with HIS 172 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     23A  TYR*     5.1     0.9    -      -       -      -
     41A  VAL*     3.8     1.6    -      -       -      +
     44A  VAL*     4.3     1.6    -      -       +      -
     45A  ALA*     3.5    20.4    -      -       +      -
     48A  PHE*     3.4    43.2    -      +       +      -
    168A  LEU*     2.8    52.4    +      -       +      -
    169A  THR      3.1     7.7    +      -       -      +
    171A  GLY*     1.3    73.6    -      -       -      +
    173A  LEU*     1.3    68.1    +      -       -      +
    174A  PHE      3.0     3.0    +      -       -      -
    176A  MET*     3.0    43.2    +      -       +      +
    180A  GLY      4.5     1.8    -      -       -      -
    181A  ALA*     3.9    30.4    +      -       +      -
    182A  GLY      5.0     3.1    +      -       -      -
    183A  MET*     3.9    10.3    -      -       +      -
    187A  ARG*     5.3     0.2    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 173 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41A  VAL*     3.8    14.1    -      -       +      +
     42A  LEU*     4.0    20.0    -      -       +      -
     45A  ALA*     3.6    18.1    -      -       +      +
    169A  THR*     2.8    34.8    +      -       +      +
    170A  LEU*     3.2    10.5    +      -       -      +
    172A  HIS*     1.3    71.7    -      -       -      +
    174A  PHE*     1.3    60.2    +      -       -      +
    177A  TYR*     4.5     9.7    -      -       -      -
     30B  ALA*     4.0    12.7    -      -       +      +
     43B  GLN*     3.9    29.1    -      -       +      +
     46B  LEU*     4.0    10.5    -      -       +      +
     47B  ALA*     3.6    44.9    -      -       +      +
     50B  LEU*     4.5     2.2    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE 174 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133A  VAL*     3.6    28.5    -      -       +      -
    137A  LEU*     3.3    16.6    -      -       +      -
    170A  LEU*     3.1    14.5    +      -       +      +
    171A  GLY      4.1     0.4    -      -       -      +
    172A  HIS      3.0     0.2    -      -       -      -
    173A  LEU*     1.3    81.1    -      -       -      +
    175A  GLY*     1.3    75.3    +      -       -      +
    176A  MET      3.6     1.4    +      -       -      -
    177A  TYR*     4.0    10.0    +      -       -      -
    178A  TYR*     3.4    44.2    -      +       -      -
     25B  PHE*     3.4    37.2    -      +       -      -
     26B  PHE*     3.8    25.4    -      +       +      +
     29B  GLY*     3.5    37.7    -      -       -      +
     30B  ALA*     3.8     6.7    -      -       +      +
    104B  LEU*     3.9     7.6    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 175 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133A  VAL*     4.6     1.6    -      -       -      -
    137A  LEU*     4.1    12.6    -      -       -      -
    171A  GLY      2.8    21.9    +      -       -      -
    174A  PHE*     1.3    82.9    -      -       -      +
    176A  MET*     1.3    65.0    +      -       -      +
    177A  TYR      3.1     3.1    -      -       -      -
    178A  TYR*     2.8    17.9    +      -       -      +
    179A  THR*     2.9    13.3    +      -       -      -
    180A  GLY      3.4     0.3    +      -       -      -
    181A  ALA      3.7     7.1    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with MET 176 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     31A  SER*     5.3     1.1    -      -       -      +
     40A  HIS*     3.8    27.8    -      -       +      +
     41A  VAL*     3.9    33.9    -      -       +      +
     44A  VAL*     3.3    44.0    -      -       +      -
    120A  THR      5.2     0.2    -      -       -      +
    172A  HIS*     3.0    37.2    +      -       +      +
    174A  PHE      3.6     0.2    -      -       -      -
    175A  GLY*     1.3    71.4    -      -       -      +
    177A  TYR*     1.3    61.3    +      -       -      +
    178A  TYR      4.2     0.2    -      -       -      -
    180A  GLY*     2.9    44.1    +      -       -      +
    181A  ALA*     3.9     1.8    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with TYR 177 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     36A  PRO      3.6    10.3    -      -       -      -
     37A  GLY*     2.6    49.9    +      -       -      -
     38A  PRO*     3.6     2.9    -      -       -      +
     41A  VAL*     3.6    11.0    -      -       +      -
    122A  HIS*     3.3    30.7    +      -       +      +
    173A  LEU      4.5    10.5    -      -       -      -
    174A  PHE      4.3    13.7    -      -       -      +
    175A  GLY      3.0     1.0    +      -       -      -
    176A  MET*     1.3    77.8    -      -       -      +
    178A  TYR*     1.3    65.5    +      +       +      +
     29B  GLY      5.4     6.5    -      -       -      -
     30B  ALA*     5.2     3.6    -      -       -      -
     32B  LEU      5.2     4.0    -      -       -      -
     33B  ARG*     4.3    25.2    +      -       -      -
     43B  GLN*     3.3    17.9    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with TYR 178 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    120A  THR      4.4     0.7    -      -       -      -
    121A  LEU*     3.5     2.1    -      -       -      +
    122A  HIS*     2.9    31.0    +      -       -      +
    125A  VAL*     3.9    21.5    -      -       +      +
    133A  VAL*     4.1    20.0    -      -       +      -
    174A  PHE*     3.4    50.4    -      +       -      -
    175A  GLY      2.8     6.7    +      -       -      +
    177A  TYR*     1.3    86.3    -      +       +      +
    179A  THR*     1.3    70.9    +      -       +      +
    180A  GLY      3.8     0.2    -      -       -      -
     29B  GLY      4.7     4.3    -      -       -      -
     32B  LEU*     3.6    11.4    -      -       +      +
    104B  LEU*     3.6    16.0    -      -       +      +
    107B  VAL*     3.7    22.7    -      -       +      -
    108B  THR*     3.5    27.8    +      -       -      -
    109B  PRO*     4.0     7.2    -      -       +      -
    112B  VAL*     5.8     2.7    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with THR 179 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    119A  ASN*     3.5     0.7    -      -       -      +
    120A  THR      3.0    20.7    +      -       -      +
    121A  LEU*     3.2    22.2    -      -       +      -
    130A  ALA*     3.5    28.9    -      -       +      +
    133A  VAL*     4.5     3.5    -      -       +      +
    134A  GLU*     2.6    26.6    +      -       +      +
    137A  LEU*     4.3     4.3    -      -       -      +
    175A  GLY      2.9     6.4    +      -       -      -
    178A  TYR*     1.3    82.0    -      -       +      +
    180A  GLY*     1.3    59.9    +      -       -      +
    181A  ALA*     2.9     9.4    +      -       -      -
    204A  TYR*     2.9    29.7    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 180 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48A  PHE*     6.0     0.3    -      -       -      -
    119A  ASN*     3.3     7.6    -      -       -      +
    120A  THR      3.6     7.0    +      -       -      -
    172A  HIS*     4.5     2.9    -      -       -      -
    175A  GLY      3.4     0.4    +      -       -      -
    176A  MET*     2.9    39.6    +      -       -      +
    179A  THR*     1.3    75.7    -      -       -      +
    181A  ALA*     1.3    73.7    +      -       -      +
    187A  ARG*     4.7     5.5    +      -       -      -
----------------------------------------------------------
 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