Contacts of the helix formed by residues 102 - 124 (chain D) in PDB entry 2OCP


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 GLU 102 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98D  MET*     2.9    13.6    +      -       -      +
     99D  MET      3.7     2.2    -      -       -      -
    101D  ARG*     1.3    86.5    -      -       +      +
    103D  PRO*     1.3    61.2    -      -       -      +
    104D  ALA      3.2     2.5    -      -       -      -
    105D  ARG*     2.8    34.5    +      -       +      +
    106D  TRP*     2.9    27.6    +      -       +      -
----------------------------------------------------------
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Residues in contact with PRO 103 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99D  MET*     3.1    21.7    -      -       +      +
    100D  TYR      3.6    10.8    -      -       -      +
    101D  ARG      3.5     9.0    -      -       -      +
    102D  GLU*     1.3    87.3    -      -       -      +
    104D  ALA*     1.3    64.0    +      -       +      +
    105D  ARG      3.0     0.2    -      -       -      -
    107D  SER*     2.4    37.0    +      -       -      +
    155D  LEU*     5.3     0.4    -      -       +      -
    160D  SER*     3.2    23.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 104 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    105C  ARG*     3.0    19.6    +      -       -      -
    102D  GLU      3.2     1.4    +      -       -      -
    103D  PRO*     1.3    83.6    -      -       +      +
    105D  ARG*     1.3    57.7    +      -       -      +
    107D  SER      4.9     0.2    -      -       -      -
    159D  GLY      4.8     9.9    -      -       -      +
    160D  SER*     3.5    18.1    -      -       -      +
    165D  GLU*     4.6     2.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 105 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    104C  ALA      3.1    25.3    +      -       -      -
    105C  ARG*     3.0    52.1    +      -       -      +
    165C  GLU*     3.4    13.5    +      -       -      -
    102D  GLU*     2.8    28.5    +      -       +      +
    104D  ALA*     1.3    81.3    -      -       -      +
    106D  TRP*     1.3   116.0    +      -       -      +
    107D  SER      3.8     0.7    -      -       -      -
    108D  TYR*     5.4     1.1    +      -       -      +
    109D  THR*     4.3     5.9    +      -       -      -
    165D  GLU*     5.1     1.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with TRP 106 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    162C  SER*     4.4     9.2    -      -       -      -
    164C  ILE*     5.7     5.6    -      -       +      -
    165C  GLU*     3.8    23.3    -      -       +      -
     95D  LEU*     4.5     7.9    -      -       +      -
     98D  MET*     3.8    42.6    -      -       +      +
     99D  MET*     3.9    21.8    -      -       -      +
    102D  GLU*     2.9    22.2    +      -       +      -
    105D  ARG*     1.3   134.0    -      -       +      +
    107D  SER*     1.3    60.2    +      -       -      +
    108D  TYR      3.4     2.0    -      -       -      -
    109D  THR*     3.4    35.2    +      -       +      -
    110D  PHE*     2.8    32.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 107 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99D  MET*     3.9     7.4    -      -       -      +
    103D  PRO*     2.4    34.0    +      -       -      +
    104D  ALA      4.9     0.2    -      -       -      -
    105D  ARG      3.8     0.8    -      -       -      -
    106D  TRP*     1.3    75.9    -      -       -      +
    108D  TYR*     1.3    65.9    +      -       -      +
    110D  PHE*     3.1     7.3    +      -       -      +
    111D  GLN*     2.9    27.5    +      -       -      +
    155D  LEU*     3.8    23.4    -      -       -      +
    160D  SER*     3.4    23.4    -      -       -      -
    161D  LEU*     3.9     7.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 108 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108C  TYR*     4.2     9.0    -      +       -      -
    109C  THR*     3.6    30.1    -      -       +      -
    112C  THR*     2.7    31.6    +      -       -      -
    105D  ARG      5.4     1.1    +      -       -      +
    106D  TRP      3.4     0.4    -      -       -      -
    107D  SER*     1.3    77.0    -      -       -      +
    109D  THR*     1.3    69.9    +      -       -      +
    111D  GLN*     3.0    14.5    +      -       -      +
    112D  THR*     3.0    39.2    +      -       +      +
    161D  LEU*     3.2    15.8    -      -       +      +
    165D  GLU*     3.3    58.3    +      -       +      +
    168D  ILE*     3.0    17.8    -      -       +      +
    169D  TYR*     3.9    21.1    -      +       +      -
    172D  TRP*     4.3     4.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with THR 109 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108C  TYR*     3.8    23.8    -      -       +      -
    109C  THR*     5.7     0.2    +      -       -      -
    164C  ILE*     4.9     3.1    -      -       +      -
    165C  GLU*     4.6     4.1    +      -       +      -
    168C  ILE*     3.7    25.6    -      -       +      -
     95D  LEU*     4.4     7.9    -      -       +      -
    105D  ARG*     4.3     6.6    +      -       -      -
    106D  TRP*     3.4    42.6    +      -       +      +
    107D  SER      3.3     0.4    -      -       -      -
    108D  TYR*     1.3    83.1    -      -       -      +
    110D  PHE*     1.3    62.3    +      -       -      +
    112D  THR*     2.8    24.7    +      -       -      -
    113D  PHE*     3.2     7.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 110 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     75D  TRP*     4.1    38.4    -      +       +      -
     95D  LEU*     3.8    35.8    -      -       +      +
     96D  LEU*     3.7    31.0    -      -       +      -
     99D  MET*     4.0    14.8    -      -       +      -
    106D  TRP      2.8    21.4    +      -       -      +
    107D  SER*     3.4     5.2    -      -       -      +
    109D  THR*     1.3    72.7    -      -       -      +
    111D  GLN*     1.3    66.4    +      -       -      +
    113D  PHE*     2.9    14.8    +      +       -      +
    114D  SER*     2.9    20.2    +      -       -      -
    301D  DTP      3.3    51.8    -      +       -      -
----------------------------------------------------------
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Residues in contact with GLN 111 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    107D  SER      2.9    11.8    +      -       -      +
    108D  TYR*     3.5    11.4    -      -       +      +
    110D  PHE*     1.3    77.7    -      -       -      +
    112D  THR*     1.3    58.1    +      -       -      +
    114D  SER*     3.1     8.9    +      -       -      -
    115D  PHE*     2.8    33.7    +      -       -      +
    147D  ASP*     3.4     9.2    -      -       -      +
    151D  PHE*     3.8     0.3    -      -       -      +
    152D  ALA*     3.7    31.9    -      -       +      -
    155D  LEU*     3.1    31.8    -      -       +      +
    161D  LEU*     5.1     4.7    -      -       +      -
    169D  TYR*     3.7    20.0    -      -       +      -
    301D  DTP      2.8    43.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with THR 112 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108C  TYR*     2.8    26.8    +      -       +      +
    112C  THR*     5.3     2.5    -      -       +      -
    168C  ILE*     3.9     2.4    -      -       -      +
    172C  TRP*     3.2    28.7    +      -       -      +
    108D  TYR*     3.0    52.4    +      -       +      +
    109D  THR*     2.8    14.7    +      -       -      -
    110D  PHE      3.2     0.2    -      -       -      -
    111D  GLN*     1.3    77.7    -      -       +      +
    113D  PHE*     1.3    61.0    +      -       -      +
    115D  PHE*     4.6     4.3    -      -       -      -
    116D  LEU*     3.3    13.7    +      -       -      +
    169D  TYR*     5.2     5.2    -      -       +      -
    172D  TRP*     6.3     0.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 113 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    167C  HIS*     5.0    13.7    -      +       -      -
    168C  ILE*     3.8    33.0    -      -       +      -
    171C  ASP*     5.3     9.0    -      -       -      -
     71D  PRO*     5.8     0.2    -      -       +      -
     74D  THR*     3.9    25.8    -      -       +      -
     75D  TRP*     3.1    39.0    -      +       -      -
     78D  ILE*     4.5    12.8    -      -       +      -
     95D  LEU*     3.9    25.4    -      -       +      -
    109D  THR      3.2     3.6    +      -       -      +
    110D  PHE*     2.9     9.6    +      +       -      +
    112D  THR*     1.3    82.0    +      -       -      +
    114D  SER*     1.3    62.4    -      -       -      +
    116D  LEU*     3.9     9.9    -      -       +      +
    117D  SER*     3.2    25.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 114 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     75D  TRP*     4.3    17.9    -      -       -      +
    110D  PHE*     2.9    28.7    +      -       -      -
    111D  GLN*     3.1    19.2    +      -       -      -
    113D  PHE*     1.3    75.9    -      -       -      +
    115D  PHE*     1.3    62.0    +      -       -      +
    117D  SER*     3.3     6.2    +      -       -      -
    118D  ARG*     2.9    43.6    +      -       -      +
    147D  ASP*     2.5    25.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 115 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    172C  TRP*     3.8    27.4    -      +       -      -
    111D  GLN      2.8    19.0    +      -       -      +
    112D  THR*     4.2     3.1    -      -       -      +
    114D  SER*     1.3    77.9    +      -       -      +
    116D  LEU*     1.3    62.2    +      -       -      +
    118D  ARG*     3.3     2.1    +      -       -      -
    119D  LEU*     2.9    31.5    +      -       +      +
    144D  VAL*     3.7    29.4    -      -       +      -
    147D  ASP*     3.5    19.5    -      -       +      +
    169D  TYR*     4.3     9.2    -      +       +      -
    172D  TRP*     4.6     4.7    -      -       +      -
    173D  HIS*     3.3    56.8    -      +       -      -
    176D  LEU*     4.2    11.4    -      -       +      -
    177D  LEU*     4.2    14.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 116 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    168C  ILE*     5.5     0.4    -      -       +      -
    171C  ASP*     3.4    33.0    -      -       +      +
    172C  TRP*     3.5    52.0    -      -       +      +
    175C  PHE*     3.8    33.4    -      -       +      -
    112D  THR      3.3    16.7    +      -       -      +
    113D  PHE*     3.9    14.8    -      -       +      +
    115D  PHE*     1.3    78.1    -      -       -      +
    117D  SER*     1.3    58.4    +      -       -      +
    119D  LEU*     3.2     5.5    +      -       +      +
    120D  LYS*     2.8    40.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 117 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     70D  GLU*     5.2     0.2    +      -       -      -
     71D  PRO*     3.0    37.5    -      -       -      +
     75D  TRP*     4.7     4.9    -      -       -      -
    113D  PHE*     3.2    22.8    +      -       -      -
    114D  SER*     3.5     7.0    -      -       -      -
    116D  LEU*     1.3    81.8    -      -       -      +
    118D  ARG*     1.3    63.4    +      -       -      +
    120D  LYS*     3.2    11.4    +      -       -      +
    121D  VAL*     3.2    22.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 118 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     70D  GLU*     3.0    40.5    +      -       -      +
     75D  TRP*     3.9    11.6    -      -       +      -
    114D  SER*     2.9    25.4    +      -       -      +
    115D  PHE*     3.8     3.6    -      -       -      +
    117D  SER*     1.3    74.6    -      -       -      +
    119D  LEU*     1.3    60.7    +      -       -      +
    121D  VAL*     3.0    27.6    -      -       +      +
    122D  GLN*     3.2    14.1    +      -       -      +
    142D  ARG*     3.8    22.3    -      -       -      +
    143D  SER*     3.4    24.7    +      -       -      +
    144D  VAL*     3.9    17.3    -      -       +      +
    147D  ASP*     2.8    38.7    +      -       -      +
    151D  PHE*     4.8     0.2    -      -       -      -
    301D  DTP      2.8    47.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 119 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    172C  TRP*     5.1     3.6    -      -       +      -
    175C  PHE*     4.5    12.1    -      -       +      -
    115D  PHE*     2.9    24.9    +      -       +      +
    116D  LEU*     3.6     4.9    -      -       +      +
    118D  ARG*     1.3    75.4    -      -       -      +
    120D  LYS*     1.3    67.0    +      -       -      +
    122D  GLN*     3.2     2.4    +      -       -      -
    123D  LEU*     3.1    40.2    +      -       +      +
    144D  VAL*     3.6    18.1    -      -       +      +
    176D  LEU*     4.0    23.8    -      -       +      -
    177D  LEU*     4.2     9.2    -      -       +      -
    180D  PHE*     4.0    28.3    -      -       +      -
    184D  ILE*     3.9    26.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 120 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    171C  ASP*     2.7    32.0    +      -       -      -
    175C  PHE*     4.0    48.7    -      -       +      +
    116D  LEU*     2.8    29.2    +      -       +      +
    117D  SER*     3.5     8.7    -      -       -      +
    119D  LEU*     1.3    76.2    -      -       -      +
    121D  VAL*     1.3    63.4    +      -       -      +
    123D  LEU*     2.9    14.5    +      -       -      +
    124D  GLU*     3.1    20.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 121 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     68D  ALA*     3.6    29.4    -      -       +      -
     69D  THR*     4.8    11.7    -      -       +      +
     70D  GLU*     6.1     0.9    -      -       -      +
     71D  PRO*     6.4     1.8    -      -       +      -
    117D  SER      3.2     7.4    +      -       -      +
    118D  ARG*     3.0    24.7    -      -       +      +
    120D  LYS*     1.3    79.6    -      -       -      +
    122D  GLN*     1.3    66.3    +      -       +      +
    123D  LEU      3.4     0.7    +      -       -      -
    124D  GLU*     3.5    34.5    +      -       -      +
    138D  GLN*     5.6     1.9    +      -       -      -
    140D  PHE*     3.6    22.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 122 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     40D  ARG*     2.9    34.9    +      -       -      +
    118D  ARG*     3.5    14.3    -      -       -      +
    119D  LEU*     3.2     6.8    +      -       -      +
    120D  LYS      3.2     0.8    -      -       -      -
    121D  VAL*     1.3    81.5    -      -       -      +
    123D  LEU*     1.3    60.4    +      -       -      +
    124D  GLU      3.5     3.1    -      -       -      +
    140D  PHE*     3.8    24.9    -      -       +      -
    142D  ARG      4.9     0.5    -      -       -      +
    143D  SER*     4.1     5.6    -      -       -      -
    144D  VAL*     3.4    35.8    +      -       -      +
    145D  TYR*     4.5     3.6    -      -       -      -
    183D  ARG      3.3     9.0    -      -       -      +
    184D  ILE*     3.2    35.6    +      -       +      +
    186D  LEU*     3.8    25.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 123 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    175C  PHE*     3.9    27.8    -      -       +      -
    179C  GLU*     4.7     3.1    -      -       -      +
    119D  LEU*     3.1    19.9    +      -       +      +
    120D  LYS*     2.9     8.7    +      -       -      +
    122D  GLN*     1.3    77.6    -      -       -      +
    124D  GLU*     1.3    66.9    +      -       -      +
    125D  PRO*     3.7     4.3    -      -       -      +
    180D  PHE*     3.9    39.0    -      -       +      -
    183D  ARG*     3.7    52.4    +      -       +      +
    184D  ILE*     3.6    27.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 124 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     40D  ARG*     5.5     1.2    +      -       -      -
    120D  LYS*     3.1    15.6    +      -       +      +
    121D  VAL*     3.5    39.0    +      -       +      +
    122D  GLN      4.3     4.3    -      -       -      +
    123D  LEU*     1.3    81.0    -      -       -      +
    125D  PRO*     1.3    79.3    -      -       +      +
    126D  PHE*     4.0     5.9    +      -       -      -
    138D  GLN*     5.4     3.1    +      -       -      +
----------------------------------------------------------
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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