Contacts of the helix formed by residues 310 - 332 (chain A) in PDB entry 1JDN


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 310 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     21A  LEU*     2.9    41.0    +      -       -      +
     26A  ARG*     5.0     2.2    -      -       -      +
    247A  PHE*     3.3    16.8    -      -       +      +
    248A  ASN*     4.0     7.9    -      -       -      +
    249A  SER*     4.6     9.2    -      -       -      -
    307A  ASP*     4.9    10.2    +      -       +      +
    309A  VAL*     1.3    75.8    -      -       -      +
    311A  MET*     1.3    66.1    +      -       -      +
    312A  PHE*     2.6    39.5    +      -       -      +
    313A  VAL*     2.9    18.9    +      -       -      +
    314A  GLU*     3.1    27.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 311 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    112A  ALA*     4.1     1.7    -      -       -      +
    115A  LEU*     4.4     4.7    -      -       +      -
    133A  ALA*     3.7    18.5    -      -       +      +
    134A  PRO*     3.6    37.0    -      -       +      +
    247A  PHE*     3.1    58.2    +      -       +      -
    279A  LEU*     3.9    24.7    -      -       +      +
    310A  ASN*     1.3    74.5    -      -       -      +
    312A  PHE*     1.3    85.1    +      -       +      +
    314A  GLU*     3.9     4.9    -      -       -      +
    315A  GLY*     2.9    24.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 312 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     21A  LEU*     3.9    19.5    -      -       +      -
     22A  PHE*     3.7    44.2    -      +       +      -
     27A  VAL*     4.9     1.1    -      -       +      -
     90A  VAL*     4.1    16.2    -      -       +      -
    112A  ALA*     3.5    31.2    -      -       +      -
    115A  LEU*     4.3     6.5    -      -       +      -
    247A  PHE*     3.5    42.8    -      +       +      -
    310A  ASN*     2.6    19.4    +      -       -      +
    311A  MET*     1.3    92.7    -      -       +      +
    313A  VAL*     1.3    65.1    +      -       -      +
    315A  GLY*     3.0     9.5    +      -       -      -
    316A  PHE*     3.0    25.8    +      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 313 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     21A  LEU      4.5     4.9    -      -       -      +
     26A  ARG*     3.3    28.3    -      -       +      +
     27A  VAL*     4.5     8.7    -      -       +      +
     30A  ALA*     3.3    36.7    -      -       +      +
    290A  PHE*     3.9    14.9    -      -       +      -
    294A  VAL*     4.3     4.5    -      -       +      -
    308A  TYR      3.5    24.2    -      -       -      +
    309A  VAL*     4.3     2.0    -      -       -      -
    310A  ASN*     2.9    34.5    +      -       -      +
    312A  PHE*     1.3    77.1    -      -       -      +
    314A  GLU*     1.3    62.2    +      -       -      +
    316A  PHE*     3.8     1.2    +      -       -      +
    317A  HIS      3.6     7.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 314 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    248A  ASN*     5.6     0.5    -      -       -      +
    279A  LEU*     4.4     7.3    -      -       -      +
    287A  PHE*     3.3    25.2    -      -       +      -
    290A  PHE*     4.4    11.9    -      -       +      -
    309A  VAL*     4.2    10.8    -      -       +      +
    310A  ASN*     3.1    21.7    +      -       -      +
    311A  MET*     4.1     3.5    -      -       -      +
    313A  VAL*     1.3    75.0    -      -       -      +
    315A  GLY*     1.3    66.7    +      -       -      +
    317A  HIS*     3.4     2.6    +      -       -      +
    318A  ASP*     3.1    28.8    +      -       -      +
    355A  ILE*     4.1    13.9    -      -       +      -
    356A  ALA*     3.6    16.6    -      -       +      +
      1B  NAG      2.7    35.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 315 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    112A  ALA*     4.2     9.2    -      -       -      -
    132A  VAL*     3.3    28.4    -      -       -      +
    133A  ALA*     5.7     1.1    -      -       -      -
    311A  MET      2.9    18.3    +      -       -      -
    312A  PHE      3.0     4.2    +      -       -      -
    314A  GLU*     1.3    77.6    -      -       -      +
    316A  PHE*     1.3    56.8    +      -       -      +
    318A  ASP*     3.1     4.5    +      -       -      -
    319A  ALA*     2.8    24.9    +      -       -      +
    367A  ARG*     5.9     2.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 316 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     14A  LEU*     3.8    27.8    -      -       +      -
     22A  PHE*     4.9     0.4    -      -       +      -
     27A  VAL*     3.5    35.0    -      -       +      -
     31A  ILE*     3.8    14.0    -      -       +      +
     87A  LEU*     4.2    20.2    -      -       +      +
     88A  GLY*     3.8    23.8    -      -       -      -
     90A  VAL*     3.8    18.6    -      -       +      -
    110A  LEU      4.0     2.2    -      -       -      -
    111A  SER*     4.0     4.0    -      -       -      -
    112A  ALA*     3.6    35.0    -      -       +      -
    312A  PHE*     3.0    25.2    +      -       +      +
    313A  VAL      4.5     1.8    -      -       -      +
    315A  GLY*     1.3    72.3    -      -       -      +
    317A  HIS*     1.3    68.1    +      -       -      +
    319A  ALA*     3.2    15.0    +      -       +      +
    320A  ILE*     3.4    16.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 317 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     30A  ALA*     3.6    18.5    +      -       -      +
     31A  ILE*     4.7     0.2    -      -       -      +
     33A  TYR*     3.5    33.9    -      +       -      -
     34A  ALA*     3.4    20.2    -      -       +      +
     37A  SER*     4.6     3.4    +      -       -      -
    286A  GLU*     5.4     2.0    +      -       -      -
    290A  PHE*     3.5    22.4    -      +       +      -
    313A  VAL      3.6     8.7    +      -       -      +
    314A  GLU      3.4     8.2    +      -       -      +
    315A  GLY      3.2     0.6    -      -       -      -
    316A  PHE*     1.3    78.5    -      -       -      +
    318A  ASP*     1.3    74.3    +      -       -      +
    320A  ILE*     3.2    16.6    +      -       -      +
    321A  LEU*     3.5    34.9    +      -       +      +
    355A  ILE*     3.2    26.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 318 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132A  VAL*     4.5     9.9    -      -       +      -
    314A  GLU*     3.1    13.3    +      -       -      +
    315A  GLY*     3.1     9.7    +      -       -      +
    317A  HIS*     1.3    91.7    +      -       -      +
    319A  ALA*     1.3    58.3    +      -       -      +
    320A  ILE      3.3     0.2    -      -       -      -
    321A  LEU*     3.5     5.8    +      -       -      +
    322A  LEU*     3.0    27.7    +      -       -      +
    352A  PHE*     3.5    14.6    -      -       +      -
    354A  GLY*     3.4    22.5    -      -       -      -
    355A  ILE*     3.0    21.4    +      -       -      +
    356A  ALA*     4.8     2.1    +      -       -      +
    357A  GLY      4.7     1.2    -      -       -      +
    359A  VAL*     3.8    13.1    -      -       +      +
    367A  ARG*     4.9     6.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 319 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     87A  LEU*     4.8     8.4    -      -       +      +
    110A  LEU*     3.5    26.3    -      -       +      +
    111A  SER      6.0     0.2    -      -       -      -
    132A  VAL*     3.9    24.0    -      -       +      -
    315A  GLY      2.8    18.9    +      -       -      +
    316A  PHE*     3.6    21.1    -      -       +      +
    317A  HIS      3.2     0.4    -      -       -      -
    318A  ASP*     1.3    71.9    -      -       -      +
    320A  ILE*     1.3    61.6    +      -       -      +
    322A  LEU*     3.4     0.8    +      -       -      -
    323A  TYR*     3.0    26.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 320 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     10A  VAL*     5.4     3.1    -      -       +      -
     31A  ILE*     4.1    17.3    -      -       +      +
     34A  ALA*     3.6    25.1    -      -       +      -
     35A  LEU*     4.1    27.4    -      -       +      -
     38A  VAL*     3.8    19.3    -      -       +      -
     54A  PHE*     5.1     8.7    -      -       +      -
     85A  LEU*     4.8    10.1    -      -       +      -
     87A  LEU*     3.8    23.6    -      -       +      -
    316A  PHE      3.4    11.4    +      -       -      +
    317A  HIS      3.2     8.9    +      -       -      +
    319A  ALA*     1.3    75.0    -      -       -      +
    321A  LEU*     1.3    67.7    +      -       -      +
    323A  TYR*     3.1    15.9    +      -       +      +
    324A  VAL*     3.1    16.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 321 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     34A  ALA*     4.5     5.4    -      -       +      -
     37A  SER*     4.5     6.3    -      -       -      +
     38A  VAL*     3.5    26.5    -      -       +      -
    317A  HIS*     3.5    38.1    -      -       +      +
    318A  ASP*     3.5     9.3    +      -       -      +
    319A  ALA      3.4     0.2    -      -       -      -
    320A  ILE*     1.3    75.7    -      -       -      +
    322A  LEU*     1.3    64.6    +      -       -      +
    324A  VAL*     3.3     6.6    +      -       -      +
    325A  LEU*     2.9    34.1    +      -       +      +
    352A  PHE*     4.0    15.0    -      -       +      -
    353A  GLU      4.1    20.2    -      -       -      +
    354A  GLY*     4.6     1.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 322 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    110A  LEU*     4.0    13.5    -      -       +      -
    130A  THR*     4.2     5.4    -      -       -      +
    132A  VAL*     4.1    15.7    -      -       +      -
    318A  ASP      3.0    16.8    +      -       -      +
    319A  ALA      3.7     4.9    -      -       -      +
    321A  LEU*     1.3    76.4    -      -       -      +
    323A  TYR*     1.3    62.8    +      -       -      +
    325A  LEU*     3.5     4.1    +      -       +      +
    326A  ALA*     3.1    22.5    +      -       -      +
    347A  THR*     2.9    41.1    -      -       -      +
    350A  ARG*     4.0    23.6    -      -       +      -
    352A  PHE*     3.8    24.7    -      -       +      -
    359A  VAL*     5.7     0.2    -      -       +      -
    361A  ILE*     4.1    22.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 323 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8A  ILE*     3.8    26.5    -      -       +      +
     54A  PHE*     4.4    18.6    -      +       -      -
     84A  ASP*     3.6    15.2    +      -       -      +
     85A  LEU*     4.0    28.5    -      -       +      -
    108A  PRO*     4.1    11.4    -      -       +      -
    110A  LEU*     4.7    10.1    -      -       +      -
    319A  ALA      3.0    14.4    +      -       -      +
    320A  ILE*     3.1    11.2    +      -       +      +
    322A  LEU*     1.3    76.3    -      -       -      +
    324A  VAL*     1.3    60.5    +      -       -      +
    326A  ALA*     3.1     6.3    +      -       -      +
    327A  LEU*     2.8    47.6    +      -       +      +
    337A  LYS*     4.0    16.3    -      -       -      +
    343A  ILE*     3.6    42.7    -      -       +      +
    347A  THR*     5.2     0.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 324 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     38A  VAL*     3.5    31.6    -      -       +      -
     48A  LEU      3.7    27.8    -      -       -      +
     49A  PRO*     4.1    14.6    -      -       +      -
     54A  PHE*     4.2    18.4    -      -       +      -
    320A  ILE*     3.1    12.0    +      -       +      +
    321A  LEU*     3.6     8.5    -      -       -      +
    323A  TYR*     1.3    80.5    -      -       +      +
    325A  LEU*     1.3    74.3    +      -       +      +
    326A  ALA      3.0     0.3    +      -       -      -
    327A  LEU*     3.0     9.7    +      -       +      +
    328A  HIS*     3.0    26.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 325 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    321A  LEU*     2.9    29.9    +      -       +      +
    322A  LEU*     3.7     7.9    -      -       -      +
    324A  VAL*     1.3    82.0    -      -       +      +
    326A  ALA*     1.3    64.2    +      -       -      +
    328A  HIS*     3.6     7.1    -      -       -      +
    329A  GLU*     3.4    19.6    +      -       -      +
    350A  ARG*     4.4    25.2    +      -       -      +
    351A  THR      5.2     0.4    -      -       -      +
    352A  PHE*     3.7    40.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 326 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    322A  LEU*     3.1    15.0    +      -       +      +
    323A  TYR*     3.4     8.5    -      -       -      +
    325A  LEU*     1.3    74.3    -      -       -      +
    327A  LEU*     1.3    66.9    +      -       -      +
    329A  GLU*     2.9    16.0    +      -       -      +
    330A  VAL*     2.9    18.1    +      -       -      +
    343A  ILE*     3.5    33.0    -      -       +      +
    346A  GLN*     3.9    21.5    -      -       +      +
    347A  THR*     4.2     5.6    -      -       -      +
    350A  ARG*     4.7     1.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 327 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8A  ILE*     4.2    19.7    -      -       +      -
     49A  PRO*     5.1    19.1    -      -       +      -
     50A  PRO*     5.9     0.7    -      -       +      -
     52A  THR*     6.0     0.9    -      -       +      -
     54A  PHE*     6.0     0.9    -      -       +      -
    323A  TYR*     2.8    47.7    +      -       +      +
    324A  VAL*     3.4     7.0    -      -       +      +
    326A  ALA*     1.3    71.4    -      -       -      +
    328A  HIS*     1.3    64.8    +      -       -      +
    330A  VAL*     2.9     9.8    +      -       +      +
    331A  LEU*     2.9    52.3    +      -       +      +
    336A  SER      4.9     0.4    -      -       -      -
    337A  LYS*     4.0    26.0    -      -       +      -
    343A  ILE*     4.4     8.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with HIS 328 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48A  LEU*     3.5    43.1    +      -       +      +
     49A  PRO*     5.9     3.8    -      -       +      -
    324A  VAL*     3.0    15.0    +      -       +      +
    325A  LEU*     3.6    13.0    -      -       -      +
    327A  LEU*     1.3    77.1    -      -       -      +
    329A  GLU*     1.3    70.0    +      -       -      +
    331A  LEU*     3.7    11.4    -      -       -      +
    332A  ARG*     3.3    40.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 329 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    325A  LEU      3.4     9.2    +      -       -      +
    326A  ALA*     2.9    11.0    +      -       -      +
    328A  HIS*     1.3    88.9    -      -       -      +
    330A  VAL*     1.3    61.4    +      -       -      +
    332A  ARG*     3.5    33.1    +      -       -      +
    333A  ALA*     3.6    17.2    +      -       -      +
    346A  GLN*     3.6    36.6    +      -       +      +
    350A  ARG*     4.6    11.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 330 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    326A  ALA      2.9    22.2    -      -       -      +
    327A  LEU*     2.9     6.2    +      -       +      +
    329A  GLU*     1.3    76.2    -      -       -      +
    331A  LEU*     1.3    70.7    +      -       +      +
    333A  ALA*     3.0    15.0    +      -       -      +
    334A  GLY      3.3     0.2    +      -       -      -
    335A  TYR*     3.1    45.9    +      -       +      -
    336A  SER      4.4     9.2    -      -       -      +
    342A  LYS*     3.9    20.6    -      -       +      +
    343A  ILE*     3.7    29.8    -      -       +      -
    346A  GLN*     3.9    13.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 331 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     49A  PRO*     5.8     1.1    -      -       +      -
     50A  PRO*     4.3    28.7    -      -       +      -
    327A  LEU*     2.9    50.7    +      -       +      +
    328A  HIS*     3.7     9.6    -      -       -      +
    330A  VAL*     1.3    75.2    -      -       +      +
    332A  ARG*     1.3    56.0    +      -       +      +
    334A  GLY*     2.6    30.3    +      -       -      -
    335A  TYR      3.4    19.2    -      -       -      +
    336A  SER*     4.2     8.7    -      -       -      -
    337A  LYS      4.4     1.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 332 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    328A  HIS*     3.3    36.7    +      -       +      +
    329A  GLU*     3.5    28.0    +      -       -      +
    331A  LEU*     1.3    79.3    -      -       +      +
    333A  ALA*     1.3    58.5    +      -       -      +
    334A  GLY*     3.2     1.0    +      -       -      -
----------------------------------------------------------
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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