Contacts of the helix formed by residues 923 - 945 (chain N) in PDB entry 4G7H


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 GLY 923 (chain N).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    918N  ALA      3.5     0.2    +      -       -      -
    919N  PHE*     3.1    22.9    +      -       -      -
    920N  LEU      4.6     0.8    +      -       -      -
    921N  ARG      3.6     1.4    -      -       -      -
    922N  LEU*     1.3    78.5    -      -       -      +
    924N  MET*     1.3    60.3    +      -       -      -
    925N  GLU      3.6     1.3    -      -       -      -
    927N  THR*     2.5    34.6    +      -       -      -
   1213N  ARG*     6.1     2.0    -      -       -      -
      7O  ASP*     3.8    12.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with MET 924 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    766N  ALA      4.6     9.6    -      -       -      +
    767N  HIS*     3.6    37.0    -      -       +      +
    769N  LEU*     4.0     4.2    -      -       -      +
    919N  PHE*     3.5    33.7    -      -       +      -
    923N  GLY*     1.3    69.0    -      -       -      +
    925N  GLU*     1.3    62.1    +      -       -      +
    927N  THR*     3.0     3.8    +      -       -      -
    928N  ALA*     2.8    30.3    +      -       -      +
   1211N  MET*     4.0    23.6    -      -       +      -
   1213N  ARG*     4.6     7.0    -      -       -      +
      2O  ALA*     5.1     0.9    -      -       +      -
      6O  ILE*     4.3    14.6    -      -       +      -
      7O  ASP*     3.1    17.8    +      -       -      +
     10O  PHE*     3.7    37.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 925 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    924N  MET*     1.3    77.8    -      -       -      +
    926N  LYS*     1.3    59.2    +      -       +      +
    928N  ALA*     3.3     4.6    +      -       -      +
    929N  ARG*     3.0    59.8    +      -       -      +
      2O  ALA*     3.9    25.1    -      -       +      +
      3O  GLU      3.7     9.7    -      -       -      +
      4O  PRO*     3.7    13.7    -      -       -      +
      5O  GLY*     3.1    28.0    +      -       -      -
      6O  ILE*     4.2     3.0    +      -       +      +
      7O  ASP*     3.5    12.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 926 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    889N  ALA      4.7     0.3    -      -       -      +
    890N  VAL*     3.0    38.7    +      -       +      +
    891N  GLU*     4.4    18.8    +      -       -      +
    892N  ASP*     4.8     4.2    +      -       -      +
    922N  LEU*     3.8    47.4    +      -       +      +
    923N  GLY      3.9     1.2    +      -       -      -
    924N  MET      3.3     0.6    -      -       -      -
    925N  GLU*     1.3    79.8    -      -       +      +
    927N  THR*     1.3    60.6    +      -       -      +
    929N  ARG*     3.2    27.9    +      -       -      +
    930N  LEU*     2.9    28.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 927 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    769N  LEU*     4.0    17.3    -      -       +      -
    890N  VAL*     5.9     0.2    -      -       -      -
    915N  VAL*     3.7    38.4    -      -       +      +
    918N  ALA*     3.2    26.4    +      -       +      -
    919N  PHE*     3.2     8.4    -      -       +      +
    923N  GLY      2.5    24.9    +      -       -      -
    924N  MET      3.0     4.6    +      -       -      -
    926N  LYS*     1.3    72.5    -      -       -      +
    928N  ALA*     1.3    60.6    +      -       -      +
    930N  LEU*     3.5     7.8    -      -       +      +
    931N  LEU*     2.9    31.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 928 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    639N  LEU*     4.3    11.8    -      -       +      +
    766N  ALA*     4.3    26.7    -      -       +      +
    769N  LEU*     4.3     1.9    -      -       +      +
    924N  MET      2.8    12.3    +      -       -      +
    925N  GLU*     3.4    12.1    -      -       -      +
    927N  THR*     1.3    76.5    -      -       -      +
    929N  ARG*     1.3    62.0    +      -       -      +
    931N  LEU*     3.2    13.9    +      -       -      +
    932N  ASP*     3.0    28.6    +      -       -      +
      2O  ALA*     4.6     6.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 929 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    889N  ALA*     4.0    19.7    +      -       -      +
    891N  GLU*     4.6    17.6    +      -       -      -
    925N  GLU*     3.0    51.7    +      -       -      +
    926N  LYS*     3.2    31.6    +      -       -      +
    928N  ALA*     1.3    76.6    -      -       +      +
    930N  LEU*     1.3    56.2    +      -       -      +
    932N  ASP*     3.3     8.0    +      -       -      +
    933N  ALA*     3.0    29.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 930 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    886N  VAL*     4.1    25.4    -      -       +      -
    889N  ALA*     3.8    23.0    -      -       +      +
    890N  VAL*     4.0    15.0    -      -       +      -
    899N  LEU*     5.5     0.2    -      -       +      -
    914N  LEU*     4.4    19.1    -      -       +      +
    915N  VAL*     5.0     4.7    -      -       +      -
    918N  ALA*     3.7    30.5    -      -       +      -
    926N  LYS      2.9    19.3    +      -       -      +
    927N  THR*     3.5     9.2    -      -       +      +
    929N  ARG*     1.3    72.9    -      -       -      +
    931N  LEU*     1.3    59.1    +      -       +      +
    933N  ALA*     3.3     1.4    +      -       +      +
    934N  LEU*     2.9    48.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 931 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    639N  LEU*     4.4     9.9    -      -       +      -
    731N  LEU*     3.6    25.1    -      -       +      +
    769N  LEU*     4.0    29.2    -      -       +      -
    779N  ALA*     3.5    29.2    -      -       +      +
    780N  LYS*     4.2     0.2    -      -       -      -
    781N  PRO*     4.0    14.6    -      -       +      -
    915N  VAL*     3.7    24.9    -      -       +      -
    927N  THR*     2.9    30.5    +      -       +      +
    928N  ALA      3.5     4.7    -      -       -      +
    930N  LEU*     1.3    75.6    -      -       +      +
    932N  ASP*     1.3    61.5    +      -       -      +
    934N  LEU*     3.3     5.2    +      -       +      +
    935N  LYS*     2.9    29.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 932 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    637N  LEU      3.5     0.9    -      -       -      +
    638N  LYS*     3.6    28.1    +      -       +      +
    639N  LEU*     3.0    28.8    +      -       -      +
    640N  HIS*     5.5     0.3    +      -       -      -
    729N  HIS*     3.0    26.8    +      -       -      -
    731N  LEU*     5.2     0.4    -      -       -      -
    928N  ALA*     3.0    15.2    +      -       -      +
    929N  ARG*     3.7     8.9    -      -       -      +
    931N  LEU*     1.3    77.4    -      -       -      +
    933N  ALA*     1.3    57.9    +      -       -      +
    935N  LYS*     3.2    22.8    +      -       -      +
    936N  TYR*     2.9    27.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 933 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    885N  ILE*     4.5    11.4    -      -       +      +
    889N  ALA*     3.7    22.0    -      -       +      -
    929N  ARG      3.0    16.8    +      -       -      +
    930N  LEU*     3.6     5.4    -      -       +      +
    932N  ASP*     1.3    73.9    -      -       -      +
    934N  LEU*     1.3    66.1    +      -       -      +
    936N  TYR*     3.2     6.2    +      -       -      +
    937N  TYR*     2.9    39.2    +      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 934 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    781N  PRO*     4.0    28.0    -      -       +      -
    785N  ILE*     3.3    10.5    -      -       -      +
    789N  LEU*     3.7    26.6    -      -       +      +
    882N  PHE*     3.8    22.7    -      -       +      -
    885N  ILE*     4.6    12.1    -      -       +      -
    886N  VAL*     4.9     1.1    -      -       +      -
    911N  LEU*     4.3     8.5    -      -       +      -
    914N  LEU*     4.3     9.0    -      -       +      -
    915N  VAL*     4.7    10.5    -      -       +      -
    930N  LEU*     2.9    44.1    +      -       +      +
    931N  LEU*     3.6     6.7    -      -       -      +
    933N  ALA*     1.3    75.1    -      -       -      +
    935N  LYS*     1.3    57.1    +      -       -      +
    937N  TYR*     4.8     1.3    -      -       -      +
    938N  GLY*     2.9    25.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 935 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    635N  PRO      2.7    29.8    +      -       -      +
    636N  GLN*     4.2     2.6    +      -       -      +
    637N  LEU      2.7    23.8    +      -       -      -
    638N  LYS*     5.2     5.4    -      -       -      +
    729N  HIS*     3.9    20.0    -      -       +      +
    730N  PRO*     4.4     5.2    -      -       +      -
    731N  LEU*     4.8     5.6    -      -       +      -
    785N  ILE*     3.9    23.1    -      -       +      +
    931N  LEU      2.9    14.1    +      -       -      +
    932N  ASP*     3.2    28.7    +      -       -      +
    934N  LEU*     1.3    76.7    -      -       -      +
    936N  TYR*     1.3    74.5    +      -       -      +
    938N  GLY*     3.7     0.2    -      -       -      -
    939N  PHE*     2.9    50.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 936 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    179L  PHE      4.5     8.3    +      -       -      -
    180L  GLN*     4.0    35.6    -      -       +      +
    932N  ASP      2.9    14.0    +      -       -      +
    933N  ALA*     3.5     9.9    -      -       -      +
    935N  LYS*     1.3    86.5    -      -       -      +
    937N  TYR*     1.3    92.0    +      +       -      +
    939N  PHE*     3.7     4.8    -      -       -      +
    940N  THR*     2.5    50.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 937 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    176L  ARG*     5.5     4.5    +      -       -      -
    198L  ARG*     4.7    12.0    +      -       -      -
    789N  LEU*     4.7     2.9    -      -       +      -
    881N  LEU*     6.0     3.4    -      -       +      -
    885N  ILE*     3.5    53.4    -      -       +      -
    888N  GLU*     5.2     4.2    +      -       -      -
    933N  ALA*     2.9    37.9    +      -       +      +
    934N  LEU      4.5     0.9    -      -       -      +
    936N  TYR*     1.3   100.9    -      +       -      +
    938N  GLY*     1.3    64.0    +      -       -      +
    940N  THR*     3.3     6.1    +      -       +      -
    941N  PHE*     2.9    52.2    +      +       +      -
----------------------------------------------------------
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Residues in contact with GLY 938 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    784N  ASP      3.7     0.2    -      -       -      +
    785N  ILE*     3.7    26.7    -      -       -      -
    788N  GLY*     3.4     6.1    -      -       -      -
    789N  LEU*     3.9    13.1    -      -       -      +
    934N  LEU      2.9    19.7    +      -       -      -
    935N  LYS      3.7     0.4    -      -       -      -
    937N  TYR*     1.3    77.6    -      -       -      +
    939N  PHE*     1.3    56.3    +      -       -      +
    942N  SER*     2.9    30.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 939 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    680M  ASP*     3.9     7.3    -      -       -      +
    681M  GLY*     3.5    34.8    -      -       -      +
    684M  PHE*     3.9    13.5    -      +       -      -
    635N  PRO*     3.9    18.4    -      -       +      -
    730N  PRO*     3.8    29.2    -      -       +      -
    784N  ASP*     3.5    30.1    -      -       +      -
    785N  ILE*     3.6    20.2    -      -       +      +
    935N  LYS*     2.9    40.9    +      -       +      +
    936N  TYR*     3.7     5.2    -      -       -      +
    938N  GLY*     1.3    73.3    -      -       -      +
    940N  THR*     1.3    64.4    +      -       -      +
    942N  SER*     2.5    22.4    +      -       -      -
    943N  THR*     3.0    12.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 940 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    680M  ASP*     4.2    10.7    +      -       -      +
    936N  TYR*     2.5    47.7    +      -       +      +
    937N  TYR*     3.5    10.5    -      -       +      -
    939N  PHE*     1.3    77.1    -      -       -      +
    941N  PHE*     1.3    72.5    +      -       +      +
    943N  THR*     3.1    20.4    +      -       -      +
    944N  THR*     3.7    14.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 941 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    788N  GLY*     4.0    11.2    -      -       -      +
    789N  LEU*     4.9     3.1    -      -       +      -
    791N  TYR*     4.7     2.2    -      -       +      -
    792N  ILE*     3.5    49.8    -      -       +      -
    860N  LEU*     4.9     7.2    -      -       +      -
    881N  LEU*     3.5    28.3    -      -       +      -
    885N  ILE*     4.2     4.3    -      -       +      -
    937N  TYR*     2.9    52.2    +      +       +      +
    938N  GLY      4.1     1.3    -      -       -      +
    940N  THR*     1.3    83.9    -      -       +      +
    942N  SER*     1.3    68.3    +      -       -      +
    944N  THR*     3.4    10.6    +      -       -      -
    945N  SER*     2.9    26.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 942 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    678M  PRO*     3.5    32.1    -      -       -      +
    680M  ASP      5.1     1.2    +      -       -      -
    681M  GLY      5.1     0.7    +      -       -      -
    784N  ASP*     3.5    25.5    +      -       -      +
    787N  LEU*     4.8     5.4    -      -       -      -
    788N  GLY*     3.7    11.4    -      -       -      +
    938N  GLY      2.9    16.6    +      -       -      -
    939N  PHE*     2.5    23.8    +      -       -      -
    941N  PHE*     1.3    77.6    -      -       -      +
    943N  THR*     1.3    58.7    +      -       -      +
    945N  SER*     2.5    24.7    +      -       -      -
    947N  ILE*     4.7     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 943 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    677M  MET*     3.4    26.0    -      -       -      +
    678M  PRO*     3.3    25.2    +      -       -      +
    679M  PHE*     3.7     8.8    -      -       -      -
    680M  ASP*     3.2    38.1    -      -       -      +
    976M  ASP*     6.0     0.3    -      -       -      -
    978M  ARG*     4.5     8.2    +      -       -      +
    983M  ILE*     3.7     8.3    -      -       -      +
    939N  PHE      3.1    16.2    -      -       -      +
    940N  THR      3.1    13.5    -      -       -      +
    942N  SER*     1.3    80.0    +      -       -      +
    944N  THR*     1.3    63.5    +      -       +      +
    945N  SER      3.5     0.2    +      -       -      -
    946N  GLY*     4.0     2.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with THR 944 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    976M  ASP*     5.1    10.8    -      -       +      +
    978M  ARG*     5.8     1.8    -      -       -      +
    982M  PRO      5.6     2.2    -      -       -      +
    983M  ILE*     3.4    14.3    -      -       +      +
    984M  GLU*     3.0    45.7    +      -       -      +
    791N  TYR*     5.6     0.7    -      -       -      -
    940N  THR*     3.7    14.9    +      -       +      +
    941N  PHE*     3.4    16.9    +      -       -      -
    943N  THR*     1.3    78.0    -      -       +      +
    945N  SER*     1.3    66.7    +      -       -      +
    946N  GLY      3.1     3.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 945 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    984M  GLU*     4.2     4.0    -      -       -      +
    985M  GLY*     4.4     2.1    +      -       -      -
    791N  TYR*     3.1    62.7    +      -       -      -
    941N  PHE      2.9    16.1    +      -       -      -
    942N  SER*     2.5    26.2    +      -       -      -
    944N  THR*     1.3    77.3    +      -       -      +
    946N  GLY*     1.3    61.8    +      -       -      +
    947N  ILE*     3.1    19.8    +      -       -      +
----------------------------------------------------------
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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