Contacts of the helix formed by residues 150 - 176 (chain J) in PDB entry 2FJC


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 150 (chain J).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     32J  ILE*     5.8     2.3    -      -       -      +
     35J  ILE*     3.8    14.1    -      -       +      +
     89J  ARG*     2.8    27.1    +      -       -      -
     93J  LEU*     4.1    13.1    -      -       -      +
    145J  ALA*     2.8    21.6    +      -       +      +
    148J  SER*     3.3    12.9    +      -       -      +
    149J  GLY*     1.3    72.3    -      -       -      +
    151J  ALA*     1.3    62.1    +      -       -      +
    152J  VAL      3.7     1.2    +      -       -      -
    153J  THR*     2.6    29.6    +      -       -      +
    154J  ASP*     3.0    19.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 151 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    142B  GLN*     3.6    39.0    -      -       +      +
    154B  ASP*     5.1     0.2    -      -       -      +
    158B  THR*     3.5    25.3    -      -       +      +
    161B  LEU*     4.7     7.0    -      -       +      -
    149J  GLY      2.8    10.5    +      -       -      +
    150J  ASP*     1.3    71.8    -      -       -      +
    152J  VAL*     1.3    58.1    +      -       -      +
    154J  ASP*     3.2     9.8    -      -       -      +
    155J  GLY      2.9    25.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 152 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    158B  THR*     4.4     6.1    -      -       -      +
    161B  LEU*     3.7    45.3    -      -       +      +
    162B  ARG*     3.7    20.8    +      -       +      +
    165B  GLY*     5.9     1.1    -      -       -      -
     89J  ARG*     3.5    37.0    -      -       -      +
     92J  GLN*     4.6     3.6    -      -       -      +
    150J  ASP*     3.3     1.2    +      -       -      -
    151J  ALA*     1.3    76.7    -      -       +      +
    153J  THR*     1.3    64.0    +      -       -      +
    155J  GLY*     3.2     2.6    +      -       -      -
    156J  ILE*     2.9    36.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 153 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     35J  ILE*     3.9    22.2    -      -       +      -
     39J  LEU*     4.3     8.7    -      -       +      -
     89J  ARG*     2.8    27.5    +      -       +      +
     93J  LEU*     4.1     2.9    -      -       -      +
    141J  THR*     4.4     2.7    -      -       +      -
    145J  ALA*     4.0     9.4    -      -       +      -
    150J  ASP*     2.6    34.1    +      -       -      -
    152J  VAL*     1.3    76.0    -      -       -      +
    154J  ASP*     1.3    63.7    +      -       -      +
    156J  ILE*     3.6     5.1    -      -       -      +
    157J  ILE*     2.9    42.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 154 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    142J  GLN*     2.8    28.1    -      -       -      +
    145J  ALA*     3.7    11.8    -      -       +      +
    146J  ALA*     3.6    25.0    -      -       -      +
    150J  ASP      3.0    15.1    +      -       -      +
    151J  ALA*     3.2    14.9    -      -       -      +
    153J  THR*     1.3    76.2    -      -       -      +
    155J  GLY*     1.3    58.4    +      -       -      +
    157J  ILE*     3.4     3.5    +      -       -      +
    158J  THR*     2.8    39.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 155 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    158B  THR*     4.9     5.8    -      -       -      -
    162B  ARG*     3.2    17.3    -      -       -      -
    151J  ALA      2.9    14.2    +      -       -      -
    152J  VAL      3.7     2.0    -      -       -      -
    154J  ASP*     1.3    77.2    -      -       -      +
    156J  ILE*     1.3    62.6    +      -       -      +
    158J  THR*     3.4     5.5    +      -       -      -
    159J  ASP*     3.0    31.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 156 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    162B  ARG*     4.0    32.1    -      -       +      +
     85J  THR*     4.0    27.8    -      -       -      +
     86J  ILE*     4.4     7.6    -      -       +      -
     89J  ARG*     3.9    28.3    -      -       +      -
     92J  GLN*     5.4     3.1    -      -       -      +
    152J  VAL*     2.9    37.5    +      -       +      +
    153J  THR*     3.3     4.7    +      -       -      +
    155J  GLY*     1.3    77.3    -      -       -      +
    157J  ILE*     1.3    74.3    +      -       +      +
    159J  ASP*     3.3     3.9    +      -       -      +
    160J  ILE*     3.3    28.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 157 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     39J  LEU*     4.3    10.3    -      -       +      -
     42J  HIS*     4.9     0.9    -      -       +      -
     86J  ILE*     4.8     8.3    -      -       +      -
     89J  ARG*     6.0     0.9    -      -       +      -
    138J  PHE*     3.3    46.7    -      -       +      +
    141J  THR*     4.0    18.8    -      -       +      -
    142J  GLN*     3.6    12.1    -      -       +      -
    153J  THR*     2.9    39.5    +      -       +      +
    154J  ASP      4.0     2.0    -      -       -      +
    156J  ILE*     1.3    87.5    -      -       +      +
    158J  THR*     1.3    59.2    +      -       -      +
    160J  ILE*     3.0     9.4    +      -       -      +
    161J  LEU*     2.7    40.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 158 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    151F  ALA*     3.4    44.3    -      -       +      +
    152F  VAL*     4.1     4.5    -      -       -      +
    155F  GLY*     4.8     9.6    -      -       -      -
    142J  GLN*     3.9     2.6    +      -       -      +
    154J  ASP*     2.8    36.5    +      -       -      -
    155J  GLY*     3.8     6.1    -      -       -      -
    157J  ILE*     1.3    76.6    -      -       -      +
    159J  ASP*     1.3    59.2    +      -       -      +
    161J  LEU*     3.1    10.3    +      -       -      +
    162J  ARG*     2.8    32.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 159 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    162B  ARG*     2.9    32.4    +      -       -      +
    155J  GLY      3.0    18.0    +      -       -      +
    156J  ILE*     3.5     6.1    -      -       -      +
    158J  THR*     1.3    77.4    -      -       -      +
    160J  ILE*     1.3    63.5    +      -       +      +
    162J  ARG*     3.3    29.0    +      -       -      +
    163J  THR*     3.3    20.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 160 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46J  LEU*     6.2     0.2    -      -       +      -
     82J  ALA*     3.6    30.3    -      -       +      -
     85J  THR*     4.3     7.4    -      -       -      +
     86J  ILE*     3.5    35.9    -      -       +      -
    138J  PHE*     3.9    30.3    -      -       +      -
    156J  ILE*     3.5    16.6    -      -       +      +
    157J  ILE*     3.0     9.5    +      -       -      +
    159J  ASP*     1.3    77.0    -      -       +      +
    161J  LEU*     1.3    65.2    +      -       -      +
    163J  THR*     3.0    12.8    +      -       -      +
    164J  LEU*     2.9    28.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 161 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    151F  ALA*     4.6     6.1    -      -       +      -
    152F  VAL*     3.5    20.5    -      -       +      +
    135J  SER*     3.6    31.7    +      -       -      +
    138J  PHE*     3.3    29.6    -      -       +      -
    139J  SER*     4.0    22.2    -      -       -      +
    142J  GLN*     4.2    12.3    -      -       +      -
    157J  ILE*     2.7    33.7    +      -       +      +
    158J  THR*     3.3    13.5    -      -       -      +
    160J  ILE*     1.3    73.4    -      -       -      +
    162J  ARG*     1.3    56.8    +      -       -      +
    164J  LEU*     3.3     4.3    +      -       +      +
    165J  GLY*     2.9    26.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 162 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     92F  GLN*     5.0     2.7    +      -       -      +
    152F  VAL*     3.5    26.7    +      -       +      +
    155F  GLY*     3.1    32.5    -      -       -      -
    156F  ILE*     3.9    31.0    -      -       +      +
    159F  ASP*     2.9    26.4    +      -       -      +
    158J  THR*     2.8    16.5    +      -       -      +
    159J  ASP*     3.4    24.0    +      -       -      +
    160J  ILE      3.1     0.2    -      -       -      -
    161J  LEU*     1.3    76.4    -      -       -      +
    163J  THR*     1.3    65.9    +      -       +      +
    165J  GLY*     3.2     2.8    +      -       -      -
    166J  LYS*     3.2    21.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 163 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     78J  SER*     4.4    14.6    +      -       -      +
    159J  ASP      3.4    13.5    -      -       -      +
    160J  ILE*     3.0    19.3    +      -       -      +
    162J  ARG*     1.3    78.2    -      -       +      +
    164J  LEU*     1.3    63.7    +      -       -      +
    166J  LYS*     3.4     6.3    +      -       -      +
    167J  ALA*     3.1    23.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 164 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     79J  VAL*     6.4     0.4    -      -       +      -
    131J  PHE*     3.8    45.1    -      -       +      +
    134J  LEU*     4.0     7.6    -      -       +      -
    135J  SER*     3.9    23.3    -      -       -      +
    138J  PHE*     3.5    37.0    -      -       +      -
    160J  ILE*     2.9    23.9    +      -       +      +
    161J  LEU*     3.6     8.7    -      -       +      +
    163J  THR*     1.3    77.6    +      -       -      +
    165J  GLY*     1.3    59.3    +      -       -      +
    167J  ALA*     3.2     3.6    +      -       +      +
    168J  ILE*     2.8    41.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 165 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     89F  ARG*     5.0     5.4    -      -       -      -
     92F  GLN*     3.7    18.2    -      -       -      +
    152F  VAL*     5.8     0.9    -      -       -      -
    135J  SER*     5.5     2.0    +      -       -      -
    161J  LEU      2.9    16.0    +      -       -      -
    162J  ARG      3.2     2.2    +      -       -      -
    164J  LEU*     1.3    77.5    -      -       -      +
    166J  LYS*     1.3    61.1    +      -       -      +
    168J  ILE*     3.9     9.0    -      -       -      +
    169J  TRP*     3.0    25.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 166 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     88F  GLU*     4.0    22.3    +      -       +      +
     92F  GLN*     3.6    19.1    +      -       -      +
     69G  HIS*     5.7     3.1    -      -       -      -
    162J  ARG*     3.2    12.3    +      -       +      +
    163J  THR*     3.8    10.3    -      -       -      +
    164J  LEU      3.2     0.4    -      -       -      -
    165J  GLY*     1.3    75.5    -      -       -      +
    167J  ALA*     1.3    58.7    +      -       -      +
    169J  TRP*     3.4    11.9    +      -       +      +
    170J  MET*     3.0    57.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 167 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     75J  TYR*     4.0    19.3    -      -       +      +
    131J  PHE*     3.8    27.4    -      -       +      -
    163J  THR      3.1    17.0    +      -       -      +
    164J  LEU*     3.7     4.7    -      -       +      +
    166J  LYS*     1.3    75.4    -      -       -      +
    168J  ILE*     1.3    60.7    +      -       -      +
    170J  MET*     3.3     8.1    +      -       -      +
    171J  LEU*     2.8    36.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 168 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128J  LYS*     3.8    11.0    -      -       +      +
    131J  PHE*     3.6    44.2    -      -       +      +
    132J  GLU*     3.8    34.1    -      -       +      +
    135J  SER*     4.0    14.6    -      -       -      +
    164J  LEU*     2.8    27.1    +      -       +      +
    165J  GLY*     3.9     7.0    -      -       -      +
    167J  ALA*     1.3    72.8    -      -       -      +
    169J  TRP*     1.3    59.5    +      -       -      +
    171J  LEU*     3.4     7.9    +      -       -      +
    172J  GLY*     2.9    26.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with TRP 169 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     88F  GLU*     3.9    22.7    -      -       +      -
     91F  LEU*     3.3    53.7    -      -       +      +
     92F  GLN*     3.5    27.8    -      -       +      -
     58G  TRP      4.0     8.5    +      -       -      -
     65G  PHE*     3.8    17.9    -      +       -      -
     69G  HIS*     3.6    28.9    -      +       -      -
    165J  GLY      3.0    17.0    +      -       -      +
    166J  LYS*     3.6    13.5    -      -       +      +
    168J  ILE*     1.3    80.4    -      -       -      +
    170J  MET*     1.3    88.9    +      -       +      +
    172J  GLY*     3.2     2.5    +      -       -      -
    173J  ALA*     3.0    25.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with MET 170 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65G  PHE*     3.7    24.0    -      -       +      -
     66G  LYS*     4.9    22.0    -      -       +      -
     69G  HIS*     4.7    11.4    -      -       +      -
     75J  TYR*     5.1     4.5    -      -       -      +
    166J  LYS*     3.0    58.3    +      -       +      +
    167J  ALA*     3.3     7.6    +      -       -      +
    169J  TRP*     1.3    90.9    -      -       +      +
    171J  LEU*     1.3    58.7    +      -       -      +
    173J  ALA*     3.1     2.6    +      -       -      +
    174J  THR*     2.6    38.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 171 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     71J  LEU*     4.6     5.2    -      -       +      -
     75J  TYR*     3.5    18.6    -      -       +      +
    124J  LEU*     3.9    41.7    -      -       +      +
    127J  VAL*     3.3    26.5    -      -       +      -
    128J  LYS*     3.7    28.9    -      -       +      +
    131J  PHE*     3.8    15.0    -      -       +      -
    167J  ALA      2.8    21.6    +      -       -      +
    168J  ILE*     3.8     3.8    -      -       -      +
    170J  MET*     1.3    75.8    -      -       -      +
    172J  GLY*     1.3    58.7    +      -       -      +
    174J  THR*     3.2     6.5    +      -       +      +
    175J  LEU*     2.9    35.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 172 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128J  LYS*     3.5    23.7    -      -       -      +
    168J  ILE      2.9    11.8    +      -       -      -
    169J  TRP*     3.6     4.3    -      -       -      -
    170J  MET      3.2     0.2    -      -       -      -
    171J  LEU*     1.3    79.1    -      -       -      +
    173J  ALA*     1.3    55.0    +      -       -      +
    175J  LEU*     3.8     2.5    -      -       -      +
    176J  LYS*     2.9    31.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 173 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     60G  ILE      4.4     5.4    -      -       -      +
     61G  TYR*     3.4     9.3    -      -       +      +
     62G  GLY      2.9    23.5    +      -       -      -
     65G  PHE*     3.7    35.0    -      -       +      -
    169J  TRP*     3.0    21.7    +      -       +      +
    170J  MET      3.1     7.6    +      -       -      +
    172J  GLY*     1.3    78.1    -      -       -      +
    174J  THR*     1.3    57.8    -      -       -      +
    175J  LEU      3.5     0.2    +      -       -      -
    176J  LYS*     3.7     7.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with THR 174 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     62G  GLY*     3.0    31.5    -      -       -      -
     63G  ILE*     3.2    24.8    +      -       -      +
     65G  PHE*     3.7    18.8    -      -       +      -
     66G  LYS*     4.7     6.5    -      -       +      +
     71J  LEU*     6.2     3.4    -      -       +      -
    124J  LEU*     3.8    23.3    -      -       +      +
    170J  MET*     2.6    32.0    +      -       +      +
    171J  LEU*     3.7     9.6    +      -       +      +
    173J  ALA*     1.3    76.5    -      -       -      +
    175J  LEU*     1.3    62.8    +      -       -      +
    176J  LYS      4.4     0.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 175 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63G  ILE*     6.0     0.9    -      -       +      -
    121J  VAL*     3.8    40.6    -      -       +      +
    124J  LEU*     3.8    18.2    -      -       +      +
    125J  ALA*     3.5    34.8    -      -       +      +
    128J  LYS*     4.2    15.3    -      -       +      -
    171J  LEU*     2.9    19.8    +      -       +      +
    172J  GLY*     4.1     3.8    -      -       -      +
    174J  THR*     1.3    84.5    -      -       -      +
    176J  LYS*     1.3    65.9    +      -       -      +
    177J  ALA*     3.4     5.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 176 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     59G  HIS      5.4     0.6    +      -       -      -
     61G  TYR*     3.5    42.1    -      -       +      +
     62G  GLY*     4.1    10.7    -      -       -      -
    117G  GLU*     2.8    50.7    +      -       -      +
    172J  GLY      2.9    18.1    +      -       -      +
    173J  ALA*     3.8    11.2    -      -       -      +
    174J  THR      3.4     1.1    -      -       -      +
    175J  LEU*     1.3    78.8    -      -       -      +
    177J  ALA*     1.3    67.4    +      -       -      +
----------------------------------------------------------
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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