Contacts of the helix formed by residues 194 - 219 (chain B) in PDB entry 2AXT


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 194 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    184B  GLU*     3.5    22.9    +      -       -      +
    188B  ASP*     2.7    36.7    +      -       -      +
    189B  GLY*     4.8     0.7    -      -       -      -
    191B  ASN*     2.9    17.5    +      -       +      +
    192B  PRO      3.5     0.6    -      -       -      -
    193B  TYR*     1.3    77.8    -      -       -      +
    195B  PRO*     1.3    55.9    -      -       -      +
    196B  GLY*     2.6    36.9    +      -       -      -
    197B  GLY*     2.7    32.5    +      -       -      +
    198B  VAL*     3.7     3.6    +      -       -      +
    261B  ALA*     4.3     2.2    -      -       -      -
    512B  CLA      5.7     0.3    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with PRO 195 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    166B  MET*     4.1    16.8    -      -       +      +
    167B  TRP      5.5     0.4    -      -       -      +
    168B  VAL*     4.1    25.4    -      -       +      -
    181B  VAL*     3.7    20.0    -      -       +      -
    193B  TYR      3.1    11.6    -      -       -      +
    194B  ASN*     1.3    83.7    -      -       -      +
    196B  GLY*     1.3    55.6    +      -       -      +
    198B  VAL*     2.5    41.8    +      -       +      +
    199B  VAL*     3.1     7.8    +      -       -      +
    261B  ALA*     3.7    14.6    -      -       +      +
     65H  LEU*     6.4     2.7    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 196 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    181B  VAL*     3.5     9.2    -      -       -      +
    182B  ALA      3.3    22.7    -      -       -      -
    184B  GLU*     3.2    21.9    +      -       -      -
    194B  ASN*     2.6    19.2    +      -       -      -
    195B  PRO*     1.3    74.1    -      -       -      +
    197B  GLY*     1.3    54.2    -      -       -      -
    199B  VAL*     3.3     2.5    +      -       -      +
    200B  ALA*     2.9    23.7    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 197 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    189B  GLY*     3.1    30.9    -      -       -      -
    194B  ASN*     2.7    15.1    +      -       -      -
    196B  GLY*     1.3    76.6    -      -       -      +
    198B  VAL*     1.3    58.5    +      -       -      +
    199B  VAL      3.1     0.4    -      -       -      -
    201B  HIS*     3.1    30.7    +      -       -      +
    512B  CLA      3.5    16.8    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 198 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    158B  LEU*     3.5    12.3    -      -       +      +
    166B  MET*     4.1    12.3    -      -       +      -
    192B  PRO      5.6     2.5    -      -       -      +
    194B  ASN      4.4     2.5    -      -       -      +
    195B  PRO*     2.5    29.7    +      -       +      +
    197B  GLY*     1.3    73.7    -      -       -      +
    199B  VAL*     1.3    56.1    +      -       -      -
    201B  HIS*     4.1     2.2    -      -       -      +
    202B  HIS*     2.7    41.1    +      -       +      -
    261B  ALA*     4.7     8.3    -      -       +      -
    262B  THR*     4.3    13.7    -      -       -      +
    512B  CLA      4.4    12.8    -      -       +      -
    513B  CLA      3.8    37.5    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 199 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    154B  GLY*     3.7    22.2    -      -       -      +
    158B  LEU*     4.0    20.2    -      -       +      -
    159B  THR*     3.9     6.3    -      -       -      +
    166B  MET*     4.8     1.3    -      -       -      -
    181B  VAL*     3.3    44.0    -      -       +      +
    183B  PRO*     3.6    28.5    -      -       +      -
    195B  PRO      3.1     5.1    +      -       -      +
    196B  GLY      3.6     4.3    -      -       -      +
    197B  GLY      3.1     0.2    -      -       -      -
    198B  VAL*     1.3    77.7    -      -       -      +
    200B  ALA*     1.3    66.8    +      -       -      +
    201B  HIS      3.0     2.8    +      -       -      -
    202B  HIS*     3.2     4.7    +      -       -      +
    203B  ILE*     3.1    22.9    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 200 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    183B  PRO*     4.0     6.2    -      -       +      +
    184B  GLU      3.3    35.2    -      -       -      +
    185B  TRP*     3.7    23.4    -      -       +      -
    196B  GLY      2.9    11.9    +      -       -      +
    199B  VAL*     1.3    76.7    -      -       -      +
    201B  HIS*     1.3    57.1    +      -       -      +
    203B  ILE*     3.3     1.6    +      -       -      +
    204B  ALA*     2.9    32.4    +      -       -      +
    512B  CLA      3.6    14.6    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with HIS 201 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    197B  GLY      3.1    18.9    +      -       -      +
    198B  VAL*     4.1     4.0    -      -       -      +
    199B  VAL      3.0     0.6    +      -       -      -
    200B  ALA*     1.3    77.3    -      -       -      +
    202B  HIS*     1.3    96.7    +      +       -      +
    203B  ILE      2.9     2.3    +      -       -      -
    204B  ALA      3.1     0.9    +      -       -      -
    205B  ALA*     2.8    42.9    +      -       +      +
    512B  CLA      2.1    84.0    +      +       +      -
    513B  CLA      3.1    41.7    -      +       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with HIS 202 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    150B  CYS*     3.2    38.5    -      -       -      +
    151B  PHE*     3.4     6.1    -      -       -      -
    153B  PHE*     3.8    24.5    -      +       -      -
    154B  GLY*     3.9    15.3    -      -       -      -
    158B  LEU*     4.1     0.6    -      -       -      +
    198B  VAL*     2.7    31.8    +      -       +      +
    199B  VAL      3.2     3.3    +      -       -      +
    201B  HIS*     1.3    86.8    -      +       -      +
    203B  ILE*     1.3    59.6    +      -       -      +
    206B  GLY      3.4    11.9    +      -       -      -
    513B  CLA      2.1    76.9    +      +       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 203 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    151B  PHE*     3.7    19.3    -      -       +      +
    154B  GLY      4.0     0.4    -      -       -      +
    155B  ALA*     3.8    35.4    -      -       +      +
    159B  THR*     4.8     0.9    -      -       -      +
    183B  PRO*     3.6    30.7    -      -       +      -
    185B  TRP*     3.2    27.6    -      -       +      -
    199B  VAL*     3.1    16.7    +      -       +      +
    200B  ALA      3.6     6.3    -      -       -      +
    201B  HIS      3.0     1.0    -      -       -      -
    202B  HIS*     1.3    76.5    -      -       -      +
    204B  ALA*     1.3    66.5    +      -       -      +
    206B  GLY      3.6     0.2    +      -       -      -
    207B  ILE*     3.3    28.7    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 204 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    185B  TRP*     4.5     6.7    -      -       +      -
    200B  ALA      2.9    17.0    +      -       -      +
    203B  ILE*     1.3    75.3    -      -       -      +
    205B  ALA*     1.3    57.8    +      -       -      +
    206B  GLY      2.8     6.9    +      -       -      -
    207B  ILE*     2.9     9.7    +      -       -      +
    208B  VAL*     2.8    29.6    +      -       +      +
    511B  CLA      4.4    13.2    -      -       +      +
    512B  CLA      3.6    38.6    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 205 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    150B  CYS*     4.4     3.8    -      -       -      -
    201B  HIS*     2.8    38.6    +      -       +      +
    204B  ALA*     1.3    73.3    -      -       -      +
    206B  GLY*     1.3    54.5    +      -       -      +
    208B  VAL*     3.9     0.8    -      -       -      -
    209B  GLY*     3.0    18.4    +      -       -      -
    512B  CLA      3.5    40.8    -      -       +      +
    513B  CLA      5.0     1.3    -      -       +      -
    515B  CLA      3.1    23.4    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 206 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    147B  GLY      3.4    18.8    -      -       -      +
    150B  CYS*     3.9     8.5    -      -       -      -
    151B  PHE*     3.9     6.1    -      -       -      -
    202B  HIS      3.4    21.5    +      -       -      -
    203B  ILE      4.0     1.1    -      -       -      -
    204B  ALA      2.8     1.4    +      -       -      -
    205B  ALA*     1.3    77.6    -      -       -      +
    207B  ILE*     1.3    57.5    +      -       -      +
    209B  GLY*     3.0     2.3    +      -       -      -
    210B  ILE*     2.8    32.9    +      -       -      +
    515B  CLA      4.3     0.2    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 207 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    151B  PHE*     3.8    23.8    -      -       +      -
    203B  ILE*     3.3    21.0    +      -       +      +
    204B  ALA*     2.9     9.5    +      -       -      +
    206B  GLY*     1.3    69.7    -      -       -      +
    208B  VAL*     1.3    61.0    +      -       +      +
    209B  GLY      2.8     4.3    -      -       -      -
    210B  ILE*     2.7    31.4    +      -       +      +
    211B  ILE*     2.9    32.3    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 208 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    204B  ALA*     2.8    14.5    +      -       +      +
    207B  ILE*     1.3    80.3    -      -       +      +
    209B  GLY*     1.3    59.0    +      -       -      +
    211B  ILE*     4.2    10.4    -      -       +      +
    212B  ALA*     3.4    21.5    +      -       -      +
    511B  CLA      4.9     4.5    -      -       -      +
    512B  CLA      3.3    53.8    -      -       +      -
    519B  CLA      3.8    21.9    -      -       +      +
    107H  BCR      4.5     6.7    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 209 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    143B  LEU*     3.3    23.9    -      -       -      +
    147B  GLY*     4.1     5.4    -      -       -      -
    205B  ALA      3.0    14.1    +      -       -      -
    206B  GLY      3.0     8.4    +      -       -      -
    207B  ILE      2.8     1.2    -      -       -      -
    208B  VAL*     1.3    79.0    -      -       -      +
    210B  ILE*     1.3    61.0    +      -       -      +
    212B  ALA*     3.9     1.1    +      -       -      -
    213B  GLY*     3.3    13.5    +      -       -      -
    515B  CLA      4.0    19.5    -      -       -      -
    519B  CLA      5.7     0.7    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 210 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    144B  PHE*     3.7    31.2    -      -       +      +
    147B  GLY      4.4     1.1    -      -       -      +
    148B  LEU*     3.7    42.8    -      -       +      +
    151B  PHE*     4.5    15.0    -      -       +      -
    206B  GLY      2.8    18.3    +      -       -      +
    207B  ILE*     2.7    14.6    +      -       +      +
    209B  GLY*     1.3    74.9    -      -       -      +
    211B  ILE*     1.3    70.7    +      -       +      +
    213B  GLY*     3.2     8.8    +      -       -      -
    214B  LEU*     3.4    19.1    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 211 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    207B  ILE*     2.9    35.7    +      -       +      +
    208B  VAL*     4.3     8.1    -      -       +      +
    210B  ILE*     1.3    81.8    -      -       +      +
    212B  ALA*     1.3    65.2    +      -       -      +
    213B  GLY      3.0     1.2    +      -       -      -
    214B  LEU*     3.2    21.0    +      -       +      +
    215B  PHE*     3.2    11.8    +      -       +      +
    519B  CLA      4.5    15.9    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 212 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    143B  LEU*     4.1    11.0    -      -       +      -
    208B  VAL      3.4    18.6    +      -       -      +
    209B  GLY*     4.1     2.9    -      -       -      +
    210B  ILE      3.4     0.2    -      -       -      -
    211B  ILE*     1.3    81.5    -      -       -      +
    213B  GLY*     1.3    61.9    +      -       -      +
    215B  PHE*     3.3     7.2    -      -       -      +
    216B  HIS*     3.0    30.4    +      -       -      -
    519B  CLA      3.5    42.8    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 213 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    140B  GLY*     3.5    21.6    -      -       -      +
    143B  LEU*     4.1     6.9    -      -       -      +
    144B  PHE*     4.0    10.1    -      -       -      -
    209B  GLY      3.3    10.5    +      -       -      -
    210B  ILE      3.2     6.8    +      -       -      -
    211B  ILE      3.0     1.2    +      -       -      -
    212B  ALA*     1.3    76.3    -      -       -      +
    214B  LEU*     1.3    64.1    +      -       -      +
    216B  HIS*     3.1     5.0    +      -       -      -
    217B  ILE*     2.8    25.3    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 214 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    144B  PHE*     3.7    29.1    -      -       +      -
    210B  ILE*     3.4    18.9    +      -       +      +
    211B  ILE*     3.2    12.5    +      -       +      +
    213B  GLY*     1.3    71.6    -      -       -      +
    215B  PHE*     1.3    52.5    +      -       -      +
    217B  ILE*     2.7    19.9    +      -       +      +
    218B  LEU*     2.7    51.6    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE 215 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    211B  ILE*     3.2     9.5    +      -       +      +
    212B  ALA*     3.3    14.6    -      -       -      +
    214B  LEU*     1.3    76.5    -      -       -      +
    216B  HIS*     1.3    67.5    +      +       -      +
    218B  LEU*     2.7    11.6    +      -       -      +
    219B  VAL*     2.5    73.3    +      -       +      +
    519B  CLA      3.5    72.0    -      +       +      -
     27H  THR*     3.9    12.1    -      -       +      -
     30H  LEU*     4.8     7.2    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with HIS 216 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    136B  PRO*     3.6    18.4    -      -       +      +
    137B  LYS*     4.2     3.6    -      -       -      -
    139B  PHE*     3.8    21.7    -      +       -      -
    140B  GLY*     3.6    24.0    -      -       -      +
    143B  LEU*     4.6     1.9    -      -       +      +
    212B  ALA      3.0    20.4    +      -       -      +
    213B  GLY      3.1     3.3    +      -       -      +
    215B  PHE*     1.3    88.6    -      +       -      +
    217B  ILE*     1.3    61.8    +      -       -      +
    218B  LEU      3.1     0.2    -      -       -      -
    219B  VAL      3.7    13.8    -      -       -      +
    519B  CLA      2.4    98.8    +      +       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 217 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    137B  LYS*     4.1    23.1    -      -       +      +
    140B  GLY*     3.4    25.8    -      -       -      +
    141B  ILE*     3.6    22.4    -      -       +      +
    144B  PHE*     4.1    18.4    -      -       +      -
    213B  GLY      2.8    14.1    +      -       -      +
    214B  LEU*     2.7    24.5    +      -       +      +
    216B  HIS*     1.3    78.2    -      -       -      +
    218B  LEU*     1.3    76.2    +      -       +      +
     14H  LEU*     6.5     1.1    -      -       +      -
     17H  GLU*     5.6     0.9    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 218 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    214B  LEU*     2.7    29.2    +      -       +      +
    215B  PHE*     2.7     3.8    +      -       -      +
    216B  HIS      4.5     0.2    -      -       -      -
    217B  ILE*     1.3    99.3    -      -       +      +
    219B  VAL*     1.3    67.7    +      -       +      +
    220B  ARG*     3.6     7.1    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 219 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    136B  PRO*     6.0     0.7    -      -       -      +
    215B  PHE*     2.5    51.9    +      -       +      +
    216B  HIS      3.7    13.3    -      -       -      +
    218B  LEU*     1.3    76.8    -      -       +      +
    220B  ARG*     1.3    76.1    +      -       -      +
    221B  PRO*     4.5     0.5    -      -       -      +
    519B  CLA      3.7    11.8    -      -       -      +
     22H  ALA*     5.7     1.8    -      -       +      -
     27H  THR*     3.6    21.8    -      -       +      +
----------------------------------------------------------
 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