Contacts of the helix formed by residues 55 - 78 (chain V) in PDB entry 1V7M


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 MET 55 (chain V).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     53V  THR      3.9    10.1    +      -       -      +
     54V  GLN*     1.3    76.2    -      -       -      +
     56V  GLU*     1.3    68.6    +      -       -      +
     57V  GLU*     3.3     3.8    -      -       +      +
     58V  THR*     3.0    28.1    +      -       -      +
     59V  LYS*     3.2    11.6    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 56 (chain V). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     54V  GLN      3.8     0.8    +      -       -      -
     55V  MET*     1.3    75.4    -      -       -      +
     57V  GLU*     1.3    63.2    +      -       +      +
     59V  LYS*     3.9    10.5    -      -       +      -
     60V  ALA*     3.8     4.0    +      -       -      +
    142V  LEU*     3.4    38.0    -      -       -      +
    145V  VAL*     3.2    34.9    -      -       -      +
    147V  GLY*     5.2     2.4    -      -       -      -
    148V  SER*     4.7    13.5    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 57 (chain V). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     30L  SER*     2.9    30.4    +      -       -      -
     31L  TYR*     3.0    29.9    -      -       +      +
     55V  MET*     3.3     2.9    -      -       +      +
     56V  GLU*     1.3    80.5    -      -       +      +
     58V  THR*     1.3    51.6    +      -       -      +
     60V  ALA*     2.8    10.4    +      -       -      +
     61V  GLN*     2.7    34.0    +      -       -      +
    107V  LEU      5.7     0.2    -      -       -      +
    108V  LEU*     4.1    22.6    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with THR 58 (chain V). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     31L  TYR*     3.2    18.4    +      -       +      -
     54V  GLN*     4.3    18.8    -      -       +      +
     55V  MET*     3.0    26.3    +      -       -      +
     57V  GLU*     1.3    75.8    -      -       -      +
     59V  LYS*     1.3    55.1    +      -       -      +
     61V  GLN*     2.6    26.5    +      -       -      -
     62V  ASP*     2.8    35.5    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 59 (chain V). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     51V  TRP*     3.3    40.4    +      -       +      +
     52V  LYS*     3.1    48.7    +      -       -      +
     54V  GLN*     3.3    23.6    -      -       +      +
     55V  MET      3.2    11.2    +      -       -      +
     56V  GLU*     3.9    16.2    -      -       +      +
     58V  THR*     1.3    75.8    -      -       -      +
     60V  ALA*     1.3    59.7    +      -       -      +
     62V  ASP*     3.5    10.5    +      -       -      +
     63V  ILE*     3.0    31.5    +      -       -      +
    141V  PHE      4.4    11.8    +      -       -      -
    142V  LEU*     3.7    24.9    -      -       +      -
    145V  VAL*     5.6     0.7    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 60 (chain V). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     56V  GLU      3.8     7.9    +      -       -      +
     57V  GLU*     2.8    13.2    +      -       -      +
     59V  LYS*     1.3    78.0    -      -       -      +
     61V  GLN*     1.3    57.8    +      -       -      +
     63V  ILE*     3.3     5.9    +      -       -      +
     64V  LEU*     3.0    27.9    +      -       -      +
    104V  LEU*     4.5     8.6    -      -       +      +
    107V  LEU*     4.7    11.2    -      -       +      -
    108V  LEU*     4.2    18.9    -      -       +      +
    142V  LEU*     3.8    25.3    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 61 (chain V). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     31L  TYR*     3.0    47.1    -      -       +      +
     33L  TYR*     3.4    19.6    +      -       -      -
     49L  SER*     2.6    31.5    +      -       -      +
     57V  GLU*     2.7     7.3    +      -       -      +
     58V  THR*     2.6    19.6    +      -       -      +
     60V  ALA*     1.3    70.8    -      -       -      +
     62V  ASP*     1.3    63.2    +      -       -      +
     64V  LEU*     3.6     2.3    +      -       -      +
     65V  GLY*     3.1    18.9    +      -       -      -
    108V  LEU*     3.4    27.0    +      -       +      +
    110V  THR*     4.8     4.0    -      -       -      +
    112V  LEU*     4.0    19.9    -      -       +      +
    115V  GLN*     5.8     0.9    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ASP 62 (chain V). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     52L  ASN*     5.6     3.8    +      -       -      -
     51V  TRP*     3.6    25.3    +      -       +      +
     54V  GLN*     4.1    11.1    +      -       -      +
     58V  THR*     2.8    42.5    +      -       -      +
     59V  LYS*     3.6     8.0    -      -       -      +
     61V  GLN*     1.3    77.6    -      -       -      +
     63V  ILE*     1.3    58.5    +      -       +      +
     65V  GLY*     3.5     3.6    +      -       -      -
     66V  ALA*     3.0    25.9    +      -       -      +
    115V  GLN*     5.1    13.4    +      -       -      +
    116V  GLY*     6.0     0.5    -      -       -      -
    138V  LYS*     5.3     4.6    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 63 (chain V). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     51V  TRP*     3.6    15.5    -      -       +      -
     59V  LYS      3.0    21.0    +      -       -      +
     60V  ALA*     3.6     9.6    -      -       -      +
     61V  GLN      3.2     0.4    -      -       -      -
     62V  ASP*     1.3    75.6    -      -       -      +
     64V  LEU*     1.3    58.0    +      -       -      +
     65V  GLY      3.0     1.3    -      -       -      -
     66V  ALA*     2.5    25.1    +      -       -      +
     67V  VAL*     2.7    24.1    +      -       +      +
    104V  LEU*     3.7    20.2    -      -       +      -
    134V  LEU*     4.8     9.0    -      -       +      -
    138V  LYS*     3.4    39.0    -      -       +      +
    139V  VAL*     3.9    23.8    -      -       +      +
    142V  LEU*     4.2    11.7    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 64 (chain V). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     60V  ALA      3.0    15.7    +      -       -      +
     61V  GLN      3.8     5.6    -      -       -      +
     62V  ASP      3.6     0.2    -      -       -      -
     63V  ILE*     1.3    75.9    -      -       -      +
     65V  GLY*     1.3    56.2    +      -       -      +
     67V  VAL*     3.3     0.9    +      -       +      +
     68V  THR*     2.5    41.0    +      -       -      +
    101V  LEU*     4.3    10.3    -      -       +      +
    104V  LEU*     3.8    29.5    -      -       +      +
    105V  GLN*     3.8    27.1    -      -       +      +
    108V  LEU*     3.4    27.6    -      -       +      -
    110V  THR      3.7    18.6    -      -       -      +
    112V  LEU*     3.5    24.2    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 65 (chain V). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     61V  GLN      3.1    11.6    +      -       -      -
     62V  ASP*     3.7     6.5    -      -       -      -
     63V  ILE      3.0     0.6    -      -       -      -
     64V  LEU*     1.3    80.3    -      -       -      +
     66V  ALA*     1.3    59.0    +      -       -      +
     68V  THR*     3.9     1.1    -      -       -      -
     69V  LEU      3.5    10.9    +      -       -      -
    112V  LEU*     4.8     5.1    -      -       -      +
    113V  PRO      3.7    18.9    -      -       -      +
    115V  GLN*     3.2    33.2    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 66 (chain V). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     42V  PRO*     2.9    43.4    -      -       +      +
     62V  ASP      3.0    15.2    +      -       -      +
     63V  ILE*     2.5    17.6    +      -       -      +
     65V  GLY*     1.3    73.0    -      -       -      +
     67V  VAL*     1.3    57.8    +      -       -      +
     68V  THR      3.3     0.2    -      -       -      -
     69V  LEU*     3.6     1.6    +      -       -      +
     70V  LEU      3.2     7.4    +      -       -      -
    115V  GLN      4.1     9.0    -      -       -      +
    116V  GLY*     6.0     1.6    -      -       -      -
    134V  LEU*     4.3    14.6    -      -       +      -
    138V  LYS*     5.2     7.2    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 67 (chain V). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63V  ILE*     2.7    30.8    +      -       +      +
     64V  LEU      3.9     3.1    -      -       -      +
     66V  ALA*     1.3    70.1    -      -       -      +
     68V  THR*     1.3    60.0    +      -       -      +
     70V  LEU*     3.6    10.0    -      -       +      +
     71V  LEU*     2.9    28.2    +      -       -      +
     97V  VAL*     3.7    25.6    -      -       +      +
    100V  LEU*     3.5    36.6    -      -       +      -
    101V  LEU*     4.1    16.7    -      -       +      +
    104V  LEU*     3.7    16.4    -      -       +      -
    131V  PHE*     5.6     0.2    -      -       +      -
    134V  LEU*     5.0     7.0    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with THR 68 (chain V). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101H  TRP*     2.9    46.7    -      -       +      +
     64V  LEU*     2.5    34.6    +      -       -      +
     65V  GLY*     3.9     5.8    -      -       -      -
     67V  VAL*     1.3    79.3    -      -       -      +
     69V  LEU*     1.3    62.0    +      -       -      +
     71V  LEU*     3.6     5.3    +      -       +      +
     72V  GLU*     3.1    23.0    +      -       -      +
    101V  LEU*     3.9     9.6    -      -       +      +
    105V  GLN*     5.1     0.2    -      -       -      +
    112V  LEU      3.8    12.0    +      -       -      +
    113V  PRO      4.3     5.2    -      -       -      -
    114V  PRO*     4.4    11.3    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 69 (chain V). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     40V  LEU*     4.6    24.3    -      -       +      +
     41V  LEU      4.7     1.6    -      -       -      -
     42V  PRO*     4.4    14.1    -      -       +      -
     65V  GLY      3.5    15.4    +      -       -      +
     66V  ALA*     3.9     4.9    -      -       -      +
     67V  VAL      3.3     0.4    -      -       -      -
     68V  THR*     1.3    75.2    -      -       -      +
     70V  LEU*     1.3    55.6    +      -       -      +
     72V  GLU*     3.0    31.5    -      -       +      +
     73V  GLY*     2.7    31.4    +      -       -      -
    114V  PRO*     4.2    13.1    -      -       +      +
    115V  GLN*     4.1    17.9    -      -       -      +
    116V  GLY      4.8     0.2    -      -       -      +
    118V  THR*     3.3    34.1    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 70 (chain V). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41V  LEU*     4.6     7.6    -      -       +      -
     42V  PRO*     3.5    23.0    -      -       +      +
     66V  ALA      3.2     7.6    +      -       -      +
     67V  VAL*     3.6     9.9    -      -       +      +
     68V  THR      3.3     0.4    -      -       -      -
     69V  LEU*     1.3    74.2    -      -       -      +
     71V  LEU*     1.3    59.6    +      -       -      +
     73V  GLY*     2.6    24.6    +      -       -      -
     74V  VAL*     2.9    21.3    +      -       +      +
     93V  LEU*     5.5     0.7    -      -       +      -
     97V  VAL*     3.7    25.8    -      -       +      -
    127V  ILE      4.2    12.1    -      -       -      +
    130V  SER*     3.8    22.2    -      -       -      +
    131V  PHE*     3.5    39.3    -      -       +      +
    134V  LEU*     4.5     7.9    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 71 (chain V). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     28H  THR*     6.0     1.1    -      -       -      -
     31H  ASP*     3.8    17.9    -      -       +      +
    101H  TRP*     5.0    14.1    -      -       +      -
     67V  VAL      2.9    16.1    +      -       -      +
     68V  THR*     4.0     6.7    -      -       +      +
     70V  LEU*     1.3    74.4    -      -       -      +
     72V  GLU*     1.3    66.0    +      -       +      +
     74V  VAL*     3.5     7.9    +      -       -      +
     75V  MET*     3.1    42.3    +      -       +      +
     94V  SER*     4.7     3.6    -      -       -      +
     97V  VAL*     3.6    27.4    -      -       +      -
     98V  ARG*     3.5    43.3    -      -       +      +
    101V  LEU*     4.9    10.8    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 72 (chain V). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    105H  TYR*     5.6     1.7    +      -       -      -
     68V  THR      3.1    15.3    +      -       -      +
     69V  LEU*     3.0    32.2    -      -       +      +
     71V  LEU*     1.3    83.3    -      -       +      +
     73V  GLY*     1.3    61.7    +      -       -      +
     75V  MET*     3.6     5.4    +      -       -      +
     76V  ALA*     3.3    23.5    +      -       +      +
    114V  PRO*     3.5    26.8    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 73 (chain V). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     39V  VAL*     3.7    26.1    -      -       -      +
     40V  LEU      4.0     9.0    -      -       -      -
     41V  LEU*     4.5     5.8    -      -       -      -
     69V  LEU      2.7    11.0    +      -       -      -
     70V  LEU      2.6    13.9    +      -       -      -
     72V  GLU*     1.3    69.6    -      -       -      +
     74V  VAL*     1.3    63.7    +      -       -      +
     76V  ALA*     3.2     3.5    +      -       -      -
     77V  ALA*     3.2    21.1    +      -       -      +
    127V  ILE*     4.9     0.7    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 74 (chain V). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41V  LEU*     5.1     0.4    -      -       -      +
     70V  LEU*     2.9    25.5    +      -       +      +
     71V  LEU*     3.7    12.1    -      -       -      +
     73V  GLY*     1.3    70.1    -      -       -      +
     75V  MET*     1.3    60.9    +      -       +      +
     77V  ALA*     4.0     0.9    -      -       -      +
     78V  ARG*     2.9    33.0    +      -       +      +
     90V  LEU*     3.9    21.4    -      -       +      +
     93V  LEU*     4.0    18.8    -      -       +      -
     94V  SER*     3.1    30.3    -      -       -      +
     97V  VAL*     4.5     6.7    -      -       +      -
    127V  ILE*     3.8    27.2    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with MET 75 (chain V). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     28H  THR*     3.6    24.7    -      -       -      +
     71V  LEU*     3.1    31.1    +      -       +      +
     72V  GLU*     3.9     6.7    -      -       -      +
     73V  GLY      3.2     0.6    -      -       -      -
     74V  VAL*     1.3    77.9    -      -       +      +
     76V  ALA*     1.3    52.2    +      -       -      +
     78V  ARG*     3.4    24.5    -      -       +      +
     79V  GLY*     2.8    29.6    +      -       -      -
     94V  SER*     4.2    15.3    -      -       -      -
     98V  ARG*     3.9    20.2    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 76 (chain V). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     39V  VAL*     4.3    11.2    -      -       +      -
     72V  GLU*     3.3    15.5    +      -       +      +
     73V  GLY*     3.2     6.3    +      -       -      +
     75V  MET*     1.3    76.9    -      -       -      +
     77V  ALA*     1.3    58.7    +      -       -      +
     79V  GLY*     3.4     4.1    -      -       -      -
     80V  GLN*     3.2    30.4    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 77 (chain V). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     35V  LEU*     3.7    34.7    -      -       +      +
     39V  VAL*     3.9     8.2    -      -       +      +
     73V  GLY      3.2    15.5    +      -       -      +
     74V  VAL*     4.1     3.1    -      -       -      +
     76V  ALA*     1.3    71.9    -      -       -      +
     78V  ARG*     1.3    57.6    +      -       -      +
     79V  GLY      3.0     4.3    -      -       -      -
     80V  GLN*     3.0    26.8    +      -       -      +
     81V  LEU*     3.4    21.2    -      -       -      +
     90V  LEU*     4.7     8.1    -      -       +      -
    127V  ILE*     5.2     6.3    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 78 (chain V). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     74V  VAL      2.9    16.6    +      -       -      +
     75V  MET*     3.4    32.6    -      -       +      +
     77V  ALA*     1.3    75.7    -      -       -      +
     79V  GLY*     1.3    55.1    +      -       -      +
     80V  GLN      3.6     0.2    -      -       -      -
     81V  LEU*     3.0    23.3    -      -       -      +
     87V  SER*     3.2    41.0    +      -       -      +
     88V  SER*     4.3     5.9    +      -       -      +
     90V  LEU*     3.4    27.9    +      -       +      +
     91V  GLY*     3.1    31.9    +      -       -      -
     94V  SER*     5.1     0.6    +      -       -      -
----------------------------------------------------------
 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