Contacts of the helix formed by residues 945 - 970 (chain A) in PDB entry 5IYB


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 945 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    941A  ASP      5.6     0.7    -      -       -      +
    942A  VAL*     3.6    11.3    +      -       +      +
    944A  SER*     1.3    79.1    +      -       -      +
    946A  ALA*     1.3    62.0    +      -       -      +
    947A  HIS*     2.6    39.7    +      -       -      +
    948A  ILE*     3.0    43.3    +      -       +      +
    949A  GLN*     2.9    27.6    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 946 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    944A  SER      3.3     6.3    +      -       -      +
    945A  ASN*     1.3    71.8    +      -       -      +
    947A  HIS*     1.3    60.1    +      -       -      +
    949A  GLN*     3.2    15.7    +      -       -      +
    950A  ASN*     3.0    26.4    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with HIS 947 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    945A  ASN*     2.6    21.2    +      -       -      +
    946A  ALA*     1.3    72.3    -      -       -      +
    948A  ILE*     1.3    61.6    +      -       +      -
    950A  ASN*     3.3    15.2    +      -       -      +
    951A  GLU*     2.9    48.6    +      -       +      +
   1007A  ILE*     6.3     0.7    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 948 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    922A  PHE*     6.3     0.7    -      -       +      -
    924A  TYR*     3.2     8.0    +      -       +      +
    942A  VAL*     3.7    36.1    -      -       +      +
    945A  ASN*     3.0    44.8    +      -       +      +
    946A  ALA      3.3     0.2    -      -       -      -
    947A  HIS*     1.3    78.6    -      -       +      +
    949A  GLN*     1.3    63.0    +      -       +      +
    951A  GLU*     3.8     1.1    -      -       -      +
    952A  LEU*     3.1    34.5    +      -       +      +
   1005A  HIS*     4.1    13.5    -      -       +      +
   1006A  PRO*     5.0     5.8    -      -       +      -
   1007A  ILE*     3.6    32.1    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 949 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    924A  TYR*     3.0    53.3    +      -       +      +
    942A  VAL      5.8     1.3    -      -       -      +
    943A  LEU      4.4    12.3    +      -       -      -
    944A  SER      4.4     4.6    +      -       -      -
    945A  ASN      2.9    25.3    +      -       -      +
    946A  ALA*     3.2    13.6    +      -       -      +
    948A  ILE*     1.3    78.4    -      -       +      +
    950A  ASN*     1.3    60.7    +      -       -      +
    953A  GLU*     3.2    30.3    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASN 950 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    946A  ALA      3.0    12.4    +      -       -      +
    947A  HIS*     3.3    19.4    +      -       -      +
    949A  GLN*     1.3    75.5    -      -       -      +
    951A  GLU*     1.3    58.7    +      -       -      +
    953A  GLU*     3.3     7.6    +      -       -      +
    954A  ARG*     2.3    76.3    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 951 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    947A  HIS*     2.9    37.9    +      -       +      +
    948A  ILE*     3.8     4.5    -      -       -      +
    950A  ASN*     1.3    78.5    +      -       -      +
    952A  LEU*     1.3    60.2    +      -       -      +
    954A  ARG*     3.1    18.9    -      -       -      +
    955A  GLU*     3.0    23.4    +      -       -      +
   1007A  ILE*     4.3    21.5    -      -       +      -
   1010A  VAL*     4.6    12.6    -      -       +      +
   1014A  LYS*     2.6    32.2    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 952 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    922A  PHE*     3.9    33.4    -      -       +      -
    924A  TYR*     3.1    28.7    -      -       +      +
    948A  ILE*     3.1    27.3    +      -       +      +
    951A  GLU*     1.3    72.6    -      -       -      +
    953A  GLU*     1.3    59.7    +      -       -      +
    954A  ARG      3.1     0.2    -      -       -      -
    955A  GLU*     2.9    29.3    +      -       -      +
    956A  PHE*     2.8    29.0    +      -       -      +
   1006A  PRO*     4.6    11.2    -      -       +      -
   1007A  ILE*     4.7     4.9    -      -       +      -
   1010A  VAL*     3.7    18.2    -      -       +      -
   1051A  SER*     3.7    13.5    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 953 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    921A  ARG*     3.9    29.3    +      -       -      +
    922A  PHE      5.5     0.7    -      -       -      +
    924A  TYR*     4.4    17.4    -      -       +      -
    949A  GLN*     3.2    20.8    +      -       +      +
    950A  ASN*     3.5     7.9    -      -       -      +
    952A  LEU*     1.3    76.4    -      -       -      +
    954A  ARG*     1.3    65.4    +      -       -      +
    956A  PHE*     4.5    14.4    -      -       -      +
    957A  GLU*     3.2    29.3    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 954 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    950A  ASN*     2.3    61.0    +      -       -      +
    951A  GLU*     3.1    28.7    -      -       -      +
    953A  GLU*     1.3    78.3    -      -       -      +
    955A  GLU*     1.3    59.0    +      -       -      +
    957A  GLU*     3.1    26.9    +      -       -      +
    958A  ARG*     3.4    24.8    +      -       -      +
   1014A  LYS*     6.0     0.4    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 955 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    951A  GLU      3.0    11.5    +      -       -      +
    952A  LEU*     2.9    34.1    +      -       +      +
    954A  ARG*     1.3    75.5    -      -       -      +
    956A  PHE*     1.3    59.9    +      -       -      +
    958A  ARG*     3.3     9.9    +      -       -      +
    959A  MET*     2.9    41.5    +      -       +      +
   1010A  VAL*     3.3    23.1    -      -       +      +
   1046A  ARG*     4.5     2.0    -      -       -      +
   1049A  LEU      4.7     1.6    -      -       -      +
   1050A  CYS*     3.7    33.1    -      -       -      +
   1051A  SER*     3.8     6.5    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE 956 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    916A  PHE*     3.7    32.3    -      +       -      -
    917A  GLU*     4.1    20.4    -      -       +      -
    920A  PHE*     4.1    19.1    -      -       +      -
    921A  ARG*     3.5    51.6    -      -       +      -
    952A  LEU      2.8    16.0    +      -       -      +
    953A  GLU*     4.3    15.3    -      -       -      +
    954A  ARG      3.6     0.2    -      -       -      -
    955A  GLU*     1.3    71.5    -      -       -      +
    957A  GLU*     1.3    63.8    +      -       -      +
    959A  MET*     3.2     8.6    +      -       +      +
    960A  ARG*     2.8    38.9    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 957 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    953A  GLU*     3.2    20.3    +      -       -      +
    954A  ARG*     3.1    37.9    +      -       -      +
    956A  PHE*     1.3    80.4    -      -       +      +
    958A  ARG*     1.3    62.2    +      -       +      +
    960A  ARG*     3.4    14.9    +      -       -      +
    961A  GLU*     2.8    36.8    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 958 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    954A  ARG      3.4    11.8    +      -       -      +
    955A  GLU*     3.3    12.9    +      -       -      +
    956A  PHE      3.2     0.2    -      -       -      -
    957A  GLU*     1.3    84.7    -      -       +      +
    959A  MET*     1.3    53.8    +      -       -      +
    961A  GLU*     3.2     8.7    +      -       +      +
    962A  ASP*     2.7    49.9    +      -       -      +
   1014A  LYS*     6.3     1.0    -      -       -      +
   1046A  ARG*     4.3    19.5    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with MET 959 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    908A  THR*     4.6     9.2    -      -       +      +
    916A  PHE*     4.2    19.3    -      -       +      -
    920A  PHE*     5.0     7.2    -      -       +      -
    955A  GLU*     2.9    35.8    +      -       +      +
    956A  PHE*     3.2    14.6    +      -       +      +
    958A  ARG*     1.3    75.3    -      -       -      +
    960A  ARG*     1.3    56.6    +      -       -      +
    962A  ASP*     3.4     7.6    +      -       -      +
    963A  ARG*     2.8    30.5    +      -       -      +
   1043A  ILE*     4.6     2.2    -      -       -      +
   1046A  ARG*     3.5    45.8    -      -       +      +
   1047A  SER*     3.7    28.7    -      -       -      -
   1050A  CYS*     5.1     4.3    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 960 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    916A  PHE*     4.4    17.9    -      -       +      -
    956A  PHE*     2.8    27.7    +      -       +      +
    957A  GLU*     3.8    13.4    +      -       -      +
    959A  MET*     1.3    74.9    -      -       -      +
    961A  GLU*     1.3   101.7    +      -       -      +
    963A  ARG*     3.4    15.8    -      -       -      +
    964A  GLU*     3.2    63.4    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 961 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    957A  GLU*     2.8    25.5    +      -       +      +
    958A  ARG*     3.5     8.1    -      -       +      +
    960A  ARG*     1.3   110.8    +      -       -      +
    962A  ASP*     1.3    60.7    +      -       -      +
    964A  GLU*     3.1    10.4    +      -       -      +
    965A  VAL*     3.0    28.8    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASP 962 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    908A  THR*     5.9     1.8    -      -       +      -
    958A  ARG*     2.7    35.1    +      -       -      +
    959A  MET*     3.4     9.0    +      -       -      +
    961A  GLU*     1.3    69.9    -      -       -      +
    963A  ARG*     1.3    55.9    +      -       -      +
    965A  VAL*     3.1    11.4    +      -       -      +
    966A  LEU*     2.7    37.7    +      -       -      +
   1039A  LEU*     5.0     5.5    -      -       -      +
   1043A  ILE*     3.8    25.2    -      -       +      +
   1046A  ARG*     3.0    40.0    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 963 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    908A  THR*     3.1    39.2    +      -       +      +
    909A  LEU*     5.7     0.3    -      -       -      +
    910A  LYS*     2.7    28.3    +      -       -      +
    911A  PRO      3.7     2.8    +      -       -      -
    912A  SER      3.7     8.7    +      -       -      -
    913A  ASN*     3.9    12.3    +      -       -      +
    916A  PHE*     3.0    65.3    -      -       -      +
    959A  MET      2.8    16.7    +      -       -      +
    960A  ARG*     3.4    13.6    -      -       -      +
    962A  ASP*     1.3    76.1    -      -       -      +
    964A  GLU*     1.3    64.9    +      -       +      +
    966A  LEU*     3.5     7.1    +      -       -      +
    967A  ARG*     2.9    54.4    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 964 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    960A  ARG*     3.2    42.5    +      -       -      +
    961A  GLU*     3.1    12.5    +      -       -      +
    962A  ASP      3.1     0.6    -      -       -      -
    963A  ARG*     1.3    83.2    -      -       +      +
    965A  VAL*     1.3    62.2    +      -       +      +
    967A  ARG*     3.4    19.9    +      -       -      +
    968A  VAL*     3.5    15.7    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 965 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    961A  GLU      3.0    17.6    +      -       -      +
    962A  ASP*     3.1    13.2    +      -       -      +
    964A  GLU*     1.3    77.0    -      -       +      +
    966A  LEU*     1.3    62.2    +      -       -      +
    968A  VAL*     3.1    12.6    +      -       +      +
    969A  ILE*     3.1    37.4    +      -       +      +
   1039A  LEU*     4.6    17.5    -      -       +      -
   1043A  ILE*     6.3     2.5    -      -       +      -
    202E  ARG*     4.9    14.6    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 966 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    906A  LEU*     4.1    12.1    -      -       +      -
    908A  THR*     4.2    22.4    -      -       +      +
    909A  LEU*     3.8    30.3    -      -       +      +
    962A  ASP      2.7    18.4    +      -       -      +
    963A  ARG*     3.8     6.5    -      -       -      +
    964A  GLU      3.4     0.2    -      -       -      -
    965A  VAL*     1.3    73.6    -      -       -      +
    967A  ARG*     1.3    61.5    +      -       -      +
    969A  ILE*     3.3    13.3    +      -       +      -
    970A  PHE*     3.1    50.8    +      -       +      +
   1040A  LEU*     4.2     7.6    -      -       +      -
   1043A  ILE*     3.8    29.6    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 967 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    908A  THR      5.1     0.9    -      -       -      -
    909A  LEU*     4.1    26.1    +      -       +      +
    910A  LYS      3.2     7.5    +      -       -      -
    911A  PRO*     4.7     0.6    +      -       -      +
    913A  ASN*     4.5     2.8    +      -       -      -
    963A  ARG*     2.9    65.1    +      -       -      +
    964A  GLU*     3.8    15.9    +      -       -      +
    965A  VAL      3.3     0.8    -      -       -      -
    966A  LEU*     1.3    73.1    -      -       -      +
    968A  VAL*     1.3    66.0    +      -       +      +
    970A  PHE      3.7    16.0    -      -       -      +
    971A  PRO*     3.7     6.9    -      -       -      +
   1322A  ILE*     3.9    15.1    -      -       -      +
   1326A  GLY*     3.2    25.6    +      -       -      -
   1327A  GLU*     5.1     0.8    -      -       -      +
   1328A  PHE*     3.7    41.7    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 968 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    964A  GLU      3.5    15.7    -      -       -      +
    965A  VAL*     3.1    11.1    +      -       +      +
    967A  ARG*     1.3    77.1    -      -       +      +
    969A  ILE*     1.3    65.3    +      -       +      +
    970A  PHE      3.5     0.2    +      -       -      -
    971A  PRO*     3.6    14.5    -      -       -      +
    196E  PRO*     5.6     1.9    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 969 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    965A  VAL*     3.1    33.3    +      -       +      +
    966A  LEU*     3.3    21.0    +      -       +      +
    968A  VAL*     1.3    76.8    -      -       +      +
    970A  PHE*     1.3    90.2    +      -       +      +
    971A  PRO*     3.1     9.2    -      -       -      +
   1039A  LEU*     4.5    12.3    -      -       +      -
   1040A  LEU*     5.3     5.2    -      -       +      -
   1043A  ILE*     5.5     2.9    -      -       +      -
    196E  PRO*     4.8    15.1    -      -       +      +
    197E  SER      3.9    16.4    -      -       -      +
    201E  GLY*     4.3    25.1    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE 970 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    906A  LEU*     3.9     7.2    -      -       +      -
    909A  LEU*     4.3     9.0    -      -       +      +
    966A  LEU*     3.1    40.5    +      -       +      +
    967A  ARG*     3.7     7.2    -      -       -      +
    969A  ILE*     1.3    98.7    -      -       +      +
    971A  PRO*     1.3    56.8    -      -       -      +
    972A  THR*     3.0    13.2    -      -       -      +
    973A  GLY*     2.8    20.6    +      -       -      +
    974A  ASP*     3.8    24.2    -      -       +      +
    977A  VAL*     3.5    32.8    -      -       +      -
   1040A  LEU*     4.1    13.9    -      -       +      -
   1328A  PHE*     4.4     4.5    -      -       -      -
    197E  SER      4.2     9.0    -      -       -      -
    198E  GLU*     4.5    16.2    -      -       +      -
----------------------------------------------------------
 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