Contacts of the helix formed by residues 103 - 127 (chain E) in PDB entry 5SV1


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 ASP 103 (chain E).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108A  MLY      3.6    26.3    -      -       -      -
    225A  ASP*     3.6    19.4    -      -       -      +
    229A  SER*     4.0     2.4    +      -       -      +
    101E  SER*     3.3    13.5    +      -       -      +
    102E  ASP*     1.3    75.5    -      -       -      +
    104E  ASN*     1.3    63.0    +      -       -      +
    105E  GLU*     3.3    26.3    +      -       -      +
    106E  GLY      3.7    10.2    +      -       -      -
    107E  ILE*     3.7    16.1    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASN 104 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101E  SER      4.6     6.2    -      -       -      +
    102E  ASP      3.5     6.7    +      -       -      +
    103E  ASP*     1.3    70.9    +      -       -      +
    105E  GLU*     1.3    68.6    +      -       -      +
    106E  GLY      2.8     3.8    +      -       -      -
    107E  ILE*     2.9    32.8    +      -       -      +
    108E  MLY      3.3    27.1    +      -       -      +
    224E  LEU*     3.7    33.6    +      -       +      +
    225E  ASP*     5.5     1.3    +      -       -      +
    227E  GLU*     6.1     0.2    -      -       -      +
    228E  ALA*     3.6    28.9    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 105 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    105A  GLU*     5.4     4.9    -      -       -      +
    103E  ASP*     3.3    13.4    +      -       -      +
    104E  ASN*     1.3    77.6    -      -       -      +
    106E  GLY*     1.3    58.8    +      -       -      +
    108E  MLY      4.1    22.5    -      -       -      +
    109E  GLU*     3.5    30.8    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 106 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108A  MLY      4.2    11.2    -      -       -      -
    221A  SER*     5.6     0.2    -      -       -      -
    225A  ASP*     4.1    16.4    -      -       -      -
    103E  ASP*     3.6     8.2    +      -       -      -
    104E  ASN      2.8     1.8    +      -       -      -
    105E  GLU*     1.3    77.0    -      -       -      +
    107E  ILE*     1.3    65.2    +      -       -      +
    109E  GLU*     2.9    25.9    +      -       -      +
    110E  ARG*     3.0    18.5    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 107 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     94E  GLU*     4.5     7.1    -      -       +      +
     95E  LEU*     3.9    24.9    -      -       +      +
     98E  SER*     3.9    23.3    -      -       -      +
    101E  SER*     5.0     7.2    -      -       -      +
    103E  ASP      3.7    12.0    +      -       -      +
    104E  ASN*     2.9    31.5    +      -       -      +
    106E  GLY*     1.3    68.1    -      -       -      -
    108E  MLY      1.3    65.0    +      -       -      +
    110E  ARG*     3.0    28.7    +      -       -      +
    111E  THR*     3.0    24.0    +      -       -      +
    220E  GLN*     4.2     9.6    -      -       -      +
    224E  LEU*     3.6    21.8    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with MLY 108 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    103D  ASP*     3.7    13.7    -      -       -      -
    105D  GLU      5.5     0.2    -      -       -      -
    106D  GLY*     4.0    18.6    -      -       -      -
    109D  GLU*     3.7    22.9    -      -       -      +
    104E  ASN*     3.7    15.5    -      -       -      +
    105E  GLU*     4.1    31.0    -      -       -      +
    107E  ILE*     1.3    73.8    +      -       -      +
    109E  GLU*     1.3    66.7    +      -       +      +
    111E  THR*     3.0    12.3    +      -       -      -
    112E  SER*     3.1    13.4    +      -       -      -
    217E  LEU*     5.1     1.0    -      -       -      +
    220E  GLN*     4.4    10.5    -      -       -      +
    221E  SER*     3.4    42.8    -      -       -      +
    224E  LEU*     4.2    18.4    -      -       +      -
    225E  ASP*     2.8    29.4    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 109 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    105A  GLU*     4.9     8.9    -      -       -      +
    108A  MLY      3.9    22.5    -      -       -      -
    221A  SER*     5.4     1.0    +      -       -      -
    105E  GLU*     3.5    26.2    -      -       -      +
    106E  GLY*     2.9    13.5    +      -       -      +
    108E  MLY      1.3    76.3    +      -       +      +
    110E  ARG*     1.3    66.7    +      -       +      +
    111E  THR      3.0     0.2    +      -       -      -
    112E  SER*     3.0    22.2    +      -       -      -
    113E  PHE*     3.1     7.9    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 110 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    218A  LEU*     3.9    25.0    -      -       +      +
    221A  SER*     3.1    26.8    +      -       -      +
    222A  ARG*     3.5    24.8    -      -       -      +
    225A  ASP*     2.6    44.5    +      -       -      +
     94E  GLU*     3.3    25.1    +      -       -      +
     98E  SER*     2.9    25.9    +      -       -      -
    101E  SER*     4.6     4.6    +      -       -      -
    103E  ASP      4.8     0.4    +      -       -      -
    106E  GLY*     3.0     4.8    +      -       -      +
    107E  ILE*     3.0    44.1    +      -       -      +
    109E  GLU*     1.3    80.1    -      -       +      +
    111E  THR*     1.3    62.8    +      -       -      +
    113E  PHE*     3.7     3.4    +      -       -      +
    114E  ARG*     3.1    28.2    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with THR 111 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     90E  GLU      5.6     0.4    -      -       -      -
     91E  ALA*     4.2    20.2    -      -       +      -
     94E  GLU*     3.7    14.8    -      -       +      +
    107E  ILE      3.0    10.7    +      -       -      -
    108E  MLY      3.0     8.0    +      -       -      -
    110E  ARG*     1.3    76.1    -      -       -      +
    112E  SER*     1.3    64.9    +      -       -      +
    114E  ARG*     3.0     9.4    +      -       +      +
    115E  LEU*     2.9    26.3    +      -       +      +
    216E  VAL*     5.6     0.2    -      -       +      -
    217E  LEU*     3.5    17.9    -      -       +      -
    220E  GLN*     2.8    43.0    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 112 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108E  MLY      3.1     8.8    +      -       -      -
    109E  GLU*     3.0    16.2    +      -       -      -
    111E  THR*     1.3    75.9    -      -       -      +
    113E  PHE*     1.3    74.1    +      -       -      +
    115E  LEU*     3.0     1.6    +      -       -      -
    116E  GLU*     2.9    34.1    +      -       -      +
    217E  LEU*     3.7    32.7    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE 113 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    116A  GLU*     5.2    11.2    -      -       -      -
    210A  GLY      5.5     0.2    -      -       -      -
    214A  ALA*     3.5    38.4    -      -       +      -
    217A  LEU*     4.4    19.5    -      -       +      -
    218A  LEU*     4.1    21.1    -      -       +      -
    109E  GLU      3.1     7.0    +      -       -      +
    110E  ARG*     3.9     8.3    -      -       -      +
    112E  SER*     1.3    83.6    +      -       -      +
    114E  ARG*     1.3    66.6    +      -       -      +
    116E  GLU*     5.2     2.5    -      -       +      -
    117E  ARG*     3.4    42.3    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 114 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    218A  LEU*     3.7    25.9    -      -       +      +
    222A  ARG*     4.4     4.5    -      -       -      +
     90E  GLU*     2.6    64.2    +      -       +      +
     93E  ASN*     3.3    27.7    +      -       -      -
     94E  GLU*     3.2    34.4    +      -       -      +
     97E  LEU*     4.7     1.2    -      -       -      +
    110E  ARG      3.1    14.8    -      -       -      +
    111E  THR*     3.0     7.9    +      -       +      +
    113E  PHE*     1.3    75.8    -      -       -      +
    115E  LEU*     1.3    67.8    +      -       +      +
    117E  ARG*     3.0    15.3    +      -       -      +
    118E  ARG*     3.0    12.6    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 115 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     87E  LEU*     3.8    40.2    -      -       +      +
     90E  GLU*     3.8    18.2    -      -       +      -
     91E  ALA      4.8     1.1    -      -       -      +
    111E  THR*     2.9    22.8    +      -       +      +
    112E  SER*     3.8     2.0    -      -       -      +
    114E  ARG*     1.3    76.9    -      -       +      +
    116E  GLU*     1.3    66.0    +      -       +      +
    118E  ARG*     2.9    17.4    +      -       +      +
    119E  VAL*     3.0    15.9    +      -       -      +
    213E  ALA*     4.1    21.1    -      -       +      +
    216E  VAL*     3.8    26.5    -      -       +      -
    217E  LEU*     3.7    31.4    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 116 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    113D  PHE*     3.9    23.6    -      -       -      -
    117D  ARG*     5.6     3.3    +      -       -      -
    112E  SER*     2.9    29.1    +      -       -      +
    113E  PHE*     4.7     3.1    -      -       +      +
    115E  LEU*     1.3    72.9    -      -       -      +
    117E  ARG*     1.3    65.5    +      -       +      +
    119E  VAL*     3.0    19.6    +      -       -      +
    120E  ALA*     2.8    20.9    +      -       -      +
    210E  GLY*     5.2     9.1    -      -       -      +
    213E  ALA*     5.0     9.6    -      -       -      +
    214E  ALA      5.4     0.5    +      -       -      -
    217E  LEU*     4.3     8.7    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 117 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    206A  LYS      5.0     0.2    +      -       -      -
    207A  ALA*     3.4    21.2    +      -       -      +
    210A  GLY*     3.6    21.9    +      -       -      -
    211A  ASP*     2.5    32.6    +      -       -      +
    214A  ALA*     3.9    13.2    -      -       -      -
    113E  PHE*     3.4    44.4    +      -       +      +
    114E  ARG*     3.0     5.1    +      -       -      +
    116E  GLU*     1.3    79.7    -      -       +      +
    118E  ARG*     1.3    52.3    +      -       -      +
    120E  ALA*     3.0    11.6    +      -       +      +
    121E  ALA*     2.7    36.0    +      -       -      +
    124E  ARG*     4.5    14.0    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 118 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     83E  LEU*     5.9     2.8    -      -       -      +
     86E  HIS*     3.8    41.2    +      -       -      +
     87E  LEU*     4.1    21.3    -      -       +      -
     90E  GLU*     3.3    39.3    +      -       +      +
    114E  ARG      3.0    10.1    +      -       -      +
    115E  LEU*     2.9    13.6    +      -       +      +
    117E  ARG*     1.3    74.1    -      -       -      +
    119E  VAL*     1.3    63.8    +      -       -      +
    121E  ALA*     3.0    11.2    +      -       -      +
    122E  VAL*     2.9    33.0    +      -       +      +
    209E  LEU*     5.7     0.2    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 119 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     87E  LEU*     5.1     5.4    -      -       +      -
    115E  LEU      3.0    11.4    +      -       -      +
    116E  GLU*     3.0    16.9    +      -       -      +
    118E  ARG*     1.3    74.5    -      -       -      +
    120E  ALA*     1.3    65.2    +      -       -      +
    122E  VAL*     2.9     5.0    +      -       -      +
    123E  GLY*     2.8    19.9    +      -       -      -
    206E  LYS*     4.1    34.5    -      -       +      +
    209E  LEU*     4.0    34.1    -      -       +      +
    210E  GLY*     4.5     5.6    -      -       -      +
    213E  ALA*     4.2    22.2    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 120 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    116E  GLU      2.8    15.0    +      -       -      +
    117E  ARG*     3.0    16.1    +      -       +      +
    119E  VAL*     1.3    73.6    -      -       -      +
    121E  ALA*     1.3    65.2    +      -       -      +
    123E  GLY*     3.0    12.8    +      -       -      +
    124E  ARG*     3.0    33.8    +      -       -      +
    206E  LYS*     5.7     7.9    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 121 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    211A  ASP*     5.1     7.2    -      -       -      +
    117E  ARG      2.7    16.6    +      -       -      +
    118E  ARG*     3.4    15.5    -      -       -      +
    120E  ALA*     1.3    71.0    -      -       -      +
    122E  VAL*     1.3    64.5    +      -       +      +
    124E  ARG*     3.0    25.6    +      -       -      +
    125E  GLN*     2.9    24.8    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 122 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     83E  LEU*     4.5    21.5    -      -       +      -
    118E  ARG*     2.9    24.9    +      -       +      +
    119E  VAL      3.5     6.5    -      -       -      +
    121E  ALA*     1.3    74.6    -      -       +      +
    123E  GLY*     1.3    64.6    +      -       -      +
    125E  GLN*     2.9    20.5    +      -       +      +
    126E  MET*     2.8    42.5    +      -       +      +
    205E  PHE*     4.6     8.1    -      -       +      -
    209E  LEU*     3.9    26.7    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 123 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    119E  VAL      2.8    16.6    +      -       -      -
    120E  ALA*     3.0     6.0    +      -       -      -
    122E  VAL*     1.3    72.7    -      -       -      +
    124E  ARG*     1.3    57.6    +      -       -      +
    126E  MET*     2.9    25.6    +      -       -      +
    127E  GLY*     3.2    10.0    +      -       -      -
    202E  ILE*     5.0     7.0    -      -       -      +
    206E  LYS*     5.0    20.0    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 124 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    203A  GLY      5.0     2.9    -      -       -      -
    204A  GLY*     4.9     9.4    -      -       -      +
    207A  ALA*     3.4    36.2    -      -       -      +
    211A  ASP*     4.6     9.3    +      -       -      -
    117E  ARG*     4.5    16.0    +      -       -      +
    120E  ALA*     3.0    28.7    +      -       -      +
    121E  ALA*     3.0    33.9    +      -       -      +
    123E  GLY*     1.3    74.9    -      -       -      +
    125E  GLN*     1.3    61.6    +      -       -      +
    126E  MET      3.5     0.5    +      -       -      -
    127E  GLY*     3.6     9.0    +      -       -      +
    128E  ARG*     3.7    27.8    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 125 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     44E  LYS*     4.6     6.4    +      -       -      -
     47E  GLU*     5.7     1.0    -      -       -      +
    121E  ALA*     2.9    14.4    +      -       -      +
    122E  VAL*     2.9    22.5    +      -       +      +
    124E  ARG*     1.3    76.0    -      -       -      +
    126E  MET*     1.3    61.9    +      -       -      +
    128E  ARG*     3.9    37.2    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with MET 126 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     44E  LYS*     3.6    24.0    -      -       -      +
     47E  GLU*     6.1     1.1    -      -       -      +
     48E  PHE*     3.9    25.4    -      -       +      -
     51E  GLN*     6.5     0.4    -      -       -      -
    122E  VAL*     2.8    29.4    +      -       +      +
    123E  GLY*     2.9    10.9    +      -       -      +
    125E  GLN*     1.3    76.8    -      -       -      +
    127E  GLY*     1.3    56.3    +      -       -      +
    128E  ARG      3.2     5.9    +      -       -      -
    130E  ASN*     4.6     1.7    +      -       -      -
    202E  ILE*     3.6    40.3    -      -       +      +
    205E  PHE*     3.4    42.8    -      -       +      -
    206E  LYS*     6.1     1.6    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 127 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    200A  ARG*     5.3     3.8    +      -       -      -
    123E  GLY      3.2     8.5    +      -       -      -
    124E  ARG*     3.6     5.9    +      -       -      -
    125E  GLN      3.5     0.2    -      -       -      -
    126E  MET*     1.3    77.6    -      -       -      +
    128E  ARG*     1.3    62.8    +      -       -      +
    129E  GLY      3.3     0.7    +      -       -      -
    130E  ASN*     3.1    24.8    +      -       -      +
    131E  GLY      4.1     3.6    +      -       -      -
    202E  ILE*     3.7    14.3    -      -       -      +
----------------------------------------------------------
 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