Contacts of the helix formed by residues 66 - 88 (chain E) in PDB entry 3DOY


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 PRO 66 (chain E).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     54E  VAL*     3.5    33.4    -      -       +      -
     58E  HIS*     3.8    30.5    -      -       +      +
     64E  ILE      3.1     3.8    -      -       -      +
     65E  PHE*     1.3    96.8    -      -       +      +
     67E  GLY*     1.3    61.2    +      -       -      +
     68E  VAL*     4.2     5.8    -      -       +      -
     69E  LEU*     2.9    38.7    +      -       +      +
     70E  ILE*     3.2    10.4    +      -       -      +
   1005E   CL      4.2     0.2    -      -       +      -
     27F  MET*     4.0    16.8    -      -       +      -
     72F  GLU*     5.1     1.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 67 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65E  PHE      3.4     2.0    +      -       -      -
     66E  PRO*     1.3    71.8    -      -       -      +
     68E  VAL*     1.3    60.8    +      -       -      +
     70E  ILE*     3.0    18.5    +      -       -      +
     71E  VAL*     3.2     6.8    +      -       -      +
    109E  PHE*     3.1    43.5    -      -       -      -
   1005E   CL      3.3    22.4    -      -       -      +
     72F  GLU*     5.6     0.2    +      -       -      -
    101F  PHE*     5.0     1.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 68 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     66E  PRO*     4.2    11.9    -      -       +      -
     67E  GLY*     1.3    75.7    -      -       -      +
     69E  LEU*     1.3    64.6    +      -       +      +
     71E  VAL*     3.4    10.2    +      -       -      +
     72E  GLU*     3.0    20.4    +      -       -      +
    109E  PHE*     4.2     0.6    -      -       -      -
     27F  MET*     4.7     0.4    -      -       +      -
     68F  VAL*     3.5    42.2    -      -       +      +
     69F  LEU*     4.5     9.0    -      -       +      -
     71F  VAL*     4.7     3.4    -      -       +      -
     72F  GLU*     3.5    36.1    +      -       +      +
    101F  PHE*     3.7    21.9    -      -       +      -
    104F  ILE*     4.4    10.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 69 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     51C  ASN*     6.0     1.3    -      -       -      +
     26E  PRO      6.1     0.7    -      -       -      +
     27E  MET*     4.5    14.8    -      -       -      -
     29E  LEU*     3.5    29.2    -      -       +      +
     54E  VAL*     3.9    29.8    -      -       +      -
     65E  PHE*     3.7    25.8    -      -       +      -
     66E  PRO*     2.9    26.4    +      -       +      +
     68E  VAL*     1.3    82.4    -      -       +      +
     70E  ILE*     1.3    59.6    +      -       -      +
     72E  GLU*     3.7     3.4    -      -       +      -
     73E  GLY*     3.0    21.5    +      -       -      -
    121E  TYR*     4.5     0.5    +      -       -      -
     27F  MET*     5.1     4.0    -      -       -      -
     68F  VAL*     4.4    15.5    -      -       +      -
     69F  LEU*     4.7     9.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 70 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65E  PHE*     3.8    20.4    -      -       +      +
     66E  PRO      3.2    10.2    +      -       -      +
     67E  GLY*     3.0    19.8    +      -       -      +
     69E  LEU*     1.3    76.0    -      -       -      +
     71E  VAL*     1.3    63.7    +      -       +      +
     73E  GLY      3.2     1.2    +      -       -      -
     74E  MET*     3.0    26.2    +      -       -      +
    109E  PHE*     4.6    12.1    -      -       +      -
    111E  ILE      5.4     1.6    -      -       -      +
    113E  VAL*     3.5    32.1    -      -       +      +
    119E  LEU*     3.8    13.5    -      -       +      -
    121E  TYR*     3.6     3.6    -      -       -      -
    139E  ALA*     3.6    29.4    -      -       +      -
    146E  VAL*     4.9     0.7    -      -       +      +
    147E  ALA*     4.1    15.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 71 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     67E  GLY      3.2    10.0    +      -       -      +
     68E  VAL*     3.6    10.1    -      -       -      +
     70E  ILE*     1.3    76.5    -      -       +      +
     72E  GLU*     1.3    59.7    +      -       -      +
     74E  MET*     3.1    11.1    +      -       -      +
     75E  ALA*     2.9    26.9    +      -       -      +
    101E  PHE*     3.9    21.8    -      -       +      -
    104E  ILE*     4.3    21.5    -      -       +      -
    107E  VAL*     4.6     9.9    -      -       +      -
    109E  PHE*     4.3    17.7    -      -       +      -
    147E  ALA*     6.5     0.2    -      -       +      -
    149E  ALA*     4.3    19.7    -      -       +      -
    151E  LEU*     4.0     7.5    -      -       +      +
     68F  VAL*     4.4     3.6    -      -       +      -
    104F  ILE*     5.1     4.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 72 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     23E  HIS*     3.5    18.4    +      -       -      -
     27E  MET*     3.8    19.5    -      -       +      +
     29E  LEU*     3.8    10.3    -      -       +      -
     68E  VAL      3.0    14.3    +      -       -      +
     69E  LEU*     3.6    12.8    -      -       -      +
     70E  ILE      3.3     0.2    -      -       -      -
     71E  VAL*     1.3    76.4    -      -       -      +
     73E  GLY*     1.3    57.9    +      -       -      +
     75E  ALA*     3.2     7.5    +      -       -      +
     76E  GLN*     2.9    57.0    +      -       -      +
    101E  PHE*     3.6    14.9    -      -       -      -
     58F  HIS*     4.5     7.5    +      -       -      -
     66F  PRO*     5.1     1.0    -      -       -      +
     67F  GLY      5.5     0.9    +      -       -      -
     68F  VAL*     3.5    28.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 73 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29E  LEU*     4.2    13.0    -      -       -      -
     30E  VAL*     3.7     6.2    -      -       -      +
     69E  LEU      3.0    12.5    +      -       -      -
     70E  ILE      3.6     1.6    -      -       -      -
     71E  VAL      3.1     0.4    -      -       -      -
     72E  GLU*     1.3    78.3    -      -       -      +
     74E  MET*     1.3    58.4    -      -       -      +
     76E  GLN*     3.5     3.4    +      -       -      -
     77E  SER*     3.1    24.3    +      -       -      -
    121E  TYR*     3.4    31.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with MET 74 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     70E  ILE*     3.0    20.7    +      -       -      +
     71E  VAL*     3.1    10.3    +      -       -      +
     73E  GLY*     1.3    74.1    -      -       -      +
     75E  ALA*     1.3    65.5    +      -       -      +
     77E  SER*     3.2     4.2    +      -       -      -
     78E  GLY*     3.0    18.2    +      -       -      -
    121E  TYR*     3.4    20.0    -      -       +      -
    123E  LEU*     3.5    32.6    -      -       +      +
    135E  VAL*     5.0     0.2    -      -       -      +
    137E  GLY      3.5    35.0    -      -       -      +
    138E  THR*     3.5    13.9    -      -       -      +
    139E  ALA*     4.2    13.7    -      -       +      -
    147E  ALA*     5.2     1.8    -      -       -      +
    148E  GLU      4.7     1.8    -      -       -      -
    149E  ALA*     3.8    27.6    -      -       +      +
    151E  LEU*     4.2     7.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 75 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     71E  VAL      2.9     6.3    +      -       -      +
     72E  GLU*     3.4    10.3    -      -       -      +
     74E  MET*     1.3    77.6    -      -       -      +
     76E  GLN*     1.3    52.3    +      -       +      +
     78E  GLY*     3.0     3.0    +      -       -      -
     79E  GLY*     2.7    32.1    +      -       -      -
     99E  VAL*     5.9     2.4    -      -       -      +
    101E  PHE*     3.5    38.8    -      -       +      -
    135E  VAL*     5.5     0.2    -      -       -      -
    151E  LEU*     3.6    21.9    -      -       +      +
    153E  ALA*     5.6     3.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 76 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     21E  LEU*     3.7    18.2    -      -       +      +
     23E  HIS*     3.5    30.8    -      -       +      +
     27E  MET      2.8    24.6    +      -       -      +
     28E  LEU*     3.6    12.8    -      -       -      +
     29E  LEU*     2.7    32.5    +      -       -      +
     30E  VAL*     3.7    15.9    +      -       +      +
     72E  GLU*     2.9    43.6    +      -       -      +
     73E  GLY      3.8     0.4    -      -       -      +
     74E  MET      3.3     0.2    -      -       -      -
     75E  ALA*     1.3    76.6    -      -       +      +
     77E  SER*     1.3    58.1    +      -       -      +
     79E  GLY*     3.2     3.3    +      -       -      +
     80E  PHE*     2.9    24.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 77 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     30E  VAL*     4.0     7.7    -      -       -      +
     42E  ILE*     3.4    24.3    -      -       -      +
     44E  ALA*     3.6    16.8    -      -       -      +
     73E  GLY      3.1    14.3    +      -       -      -
     74E  MET      3.4     9.2    -      -       -      -
     75E  ALA      3.1     0.4    -      -       -      -
     76E  GLN*     1.3    72.3    -      -       -      +
     78E  GLY*     1.3    66.0    +      -       -      +
     80E  PHE*     3.3     4.4    +      -       -      +
     81E  LEU*     3.1    17.8    +      -       -      +
    121E  TYR*     3.4    20.1    -      -       -      +
    123E  LEU*     3.9    17.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 78 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     42E  ILE*     4.7     1.6    -      -       -      -
     74E  MET      3.0    13.2    +      -       -      -
     75E  ALA      3.5     3.1    -      -       -      -
     77E  SER*     1.3    76.4    -      -       -      +
     79E  GLY*     1.3    52.0    +      -       -      +
     81E  LEU*     3.1     9.2    +      -       -      +
     82E  ALA*     2.6    37.6    +      -       -      +
    123E  LEU*     4.3     4.9    -      -       -      +
    133E  TRP*     5.5     1.2    -      -       -      -
    135E  VAL*     4.4    27.2    -      -       -      +
    151E  LEU*     6.3     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 79 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     21E  LEU*     4.1    10.3    -      -       -      +
     75E  ALA      2.7    14.7    +      -       -      -
     76E  GLN*     3.2     4.9    +      -       -      -
     77E  SER      3.2     0.2    -      -       -      -
     78E  GLY*     1.3    76.3    -      -       -      +
     80E  PHE*     1.3    56.6    +      -       -      +
     82E  ALA*     3.2     7.7    +      -       -      +
     83E  PHE*     2.9    30.7    +      -       -      +
     99E  VAL*     5.2    17.3    -      -       -      -
    153E  ALA*     6.2     2.0    -      -       -      -
    155E  ILE*     4.3     4.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 80 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     12E  PHE*     3.7    25.4    -      +       -      -
     16E  HIS      4.1     1.1    -      -       -      -
     17E  ILE*     4.0    20.4    -      -       +      -
     20E  ILE*     3.7    36.6    -      -       +      -
     21E  LEU*     3.8    16.0    -      -       +      +
     30E  VAL*     6.4     1.1    -      -       +      -
     33E  ILE*     3.4    35.7    -      -       +      -
     36E  LEU*     3.8    17.5    -      -       +      -
     42E  ILE*     4.0    10.8    -      -       +      -
     76E  GLN      2.9    12.4    +      -       -      +
     77E  SER*     3.6    10.1    -      -       -      +
     78E  GLY      3.3     0.2    -      -       -      -
     79E  GLY*     1.3    75.2    -      -       -      +
     81E  LEU*     1.3    62.1    +      -       -      +
     83E  PHE*     3.5     0.5    +      -       -      -
     84E  THR*     2.9    51.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 81 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     36E  LEU*     3.2    27.4    -      -       +      -
     37E  GLN      3.5    14.6    -      -       -      +
     38E  ALA*     4.4     0.2    -      -       -      -
     39E  ASN      4.1     1.8    -      -       -      +
     40E  GLN      4.3     0.2    -      -       -      +
     41E  LYS*     3.5    20.2    -      -       -      +
     42E  ILE*     3.7    23.6    -      -       +      -
     77E  SER      3.1     9.4    +      -       -      +
     78E  GLY*     3.1    12.3    +      -       -      +
     80E  PHE*     1.3    80.9    -      -       -      +
     82E  ALA*     1.3    59.2    +      -       -      +
     84E  THR*     3.5     4.6    +      -       -      +
     85E  SER*     2.8    42.8    +      -       -      +
    123E  LEU      4.5     3.1    -      -       -      +
    125E  VAL*     3.5    31.2    -      -       +      +
    133E  TRP*     4.9     1.3    -      -       +      -
    135E  VAL*     5.0     4.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 82 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     78E  GLY      2.6    20.8    +      -       -      +
     79E  GLY*     3.5     8.1    -      -       -      +
     81E  LEU*     1.3    74.6    -      -       -      +
     83E  PHE*     1.3    62.8    +      -       -      +
     85E  SER*     3.7     2.4    -      -       -      -
     86E  LEU*     3.2    25.9    +      -       -      +
    133E  TRP*     3.6    45.9    -      -       +      -
    155E  ILE*     3.8    16.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 83 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     20E  ILE*     3.9    29.4    -      -       +      -
     21E  LEU*     6.2     0.4    -      -       +      -
     79E  GLY      2.9    15.8    +      -       -      +
     82E  ALA*     1.3    77.8    -      -       -      +
     84E  THR*     1.3    62.0    +      -       +      +
     86E  LEU*     3.2     5.3    +      -       -      +
     87E  TRP*     3.0    59.1    +      +       +      -
     88E  GLY      3.5    19.1    -      -       -      -
     90E  ASP      3.5    16.4    -      -       -      -
     93E  ILE*     3.9     7.4    -      -       +      -
     94E  ALA*     3.3    44.4    -      -       +      -
     97E  LYS*     4.0    13.2    -      -       +      -
    155E  ILE*     3.7    13.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with THR 84 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      9E  GLN*     5.9     5.1    +      -       -      -
     12E  PHE*     5.4     2.5    -      -       +      -
     20E  ILE*     4.4     6.5    -      -       +      -
     36E  LEU*     3.6    21.5    -      -       +      +
     38E  ALA*     5.9     0.4    -      -       -      -
     80E  PHE*     2.9    42.1    +      -       +      +
     81E  LEU*     3.5     4.0    +      -       -      -
     83E  PHE*     1.3    81.5    -      -       +      +
     85E  SER*     1.3    63.3    +      -       -      +
     86E  LEU      3.2     0.2    -      -       -      -
     88E  GLY*     2.8    47.3    +      -       -      +
     89E  PHE*     4.5     9.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 85 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     38E  ALA*     3.6    15.3    -      -       -      +
     39E  ASN*     2.8    52.0    +      -       -      +
     81E  LEU*     2.8    25.9    +      -       -      +
     82E  ALA      3.7     0.7    -      -       -      -
     83E  PHE      3.2     0.2    -      -       -      -
     84E  THR*     1.3    78.6    +      -       -      +
     86E  LEU*     1.3    64.7    +      -       -      +
     88E  GLY      4.8     0.2    +      -       -      -
    133E  TRP*     3.5    12.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 86 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     39E  ASN*     5.5     0.9    -      -       -      +
     82E  ALA      3.2    13.0    +      -       -      +
     83E  PHE      3.4     7.0    -      -       -      +
     84E  THR      3.2     0.2    -      -       -      -
     85E  SER*     1.3    82.8    -      -       -      +
     87E  TRP*     1.3    89.0    +      -       +      +
     88E  GLY      3.6     0.4    -      -       -      -
    128E  HIS*     5.6     2.0    -      -       +      +
    130E  GLY*     4.0     7.2    -      -       -      +
    131E  MET*     3.8    32.1    -      -       +      -
    133E  TRP*     3.4    41.1    -      -       +      +
    155E  ILE*     4.2     9.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with TRP 87 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     83E  PHE*     3.0    55.3    +      +       +      +
     86E  LEU*     1.3   106.9    -      -       +      +
     88E  GLY*     1.3    62.8    +      -       -      +
     89E  PHE      3.9     0.3    +      -       -      -
     90E  ASP*     4.0    11.4    -      -       +      +
     93E  ILE*     3.8    36.5    -      -       +      +
     97E  LYS*     3.6    29.4    -      -       -      -
    131E  MET*     3.8    33.2    -      -       +      -
    155E  ILE*     4.2     8.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 88 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      9E  GLN*     5.9     3.8    -      -       -      -
     83E  PHE*     3.5     9.7    -      -       -      -
     84E  THR*     2.8    41.0    +      -       -      +
     86E  LEU      3.6     1.0    -      -       -      -
     87E  TRP*     1.3    81.5    -      -       -      +
     89E  PHE*     1.3    58.5    +      -       -      -
     90E  ASP      3.1     6.4    +      -       -      -
----------------------------------------------------------
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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