Contacts of the helix formed by residues 163 - 184 (chain C) in PDB entry 1ORR


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 SER 163 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    178A  ASP*     2.6    20.1    +      -       -      +
    182A  ILE*     3.8    13.7    -      -       -      +
     86C  MET*     3.7    37.6    -      -       -      +
     90C  ILE*     4.9     0.9    -      -       -      -
    127C  LYS*     5.2     0.2    -      -       -      +
    162C  HIS*     1.3    83.9    +      -       -      +
    164C  PRO*     1.3    76.9    -      -       -      +
    165C  TYR*     3.5    10.6    +      -       -      +
    166C  GLY      2.9    21.3    +      -       -      -
    167C  CYS*     3.0     9.9    +      -       -      -
    300C  GLU*     5.6     0.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with PRO 164 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    175A  TYR*     3.7    11.5    +      -       +      +
    178A  ASP*     3.5     9.2    -      -       -      +
    179A  TYR*     5.0     3.4    -      -       +      -
    182A  ILE*     4.2     5.8    -      -       +      -
    183A  PHE*     4.1    24.2    -      -       +      -
     89C  SER*     3.5    33.9    -      -       -      +
     90C  ILE*     4.0    12.6    -      -       +      -
     93C  PRO*     4.1    13.2    -      -       +      -
     96C  ASP*     3.0    12.4    -      -       -      +
    163C  SER*     1.3    87.5    -      -       -      +
    165C  TYR*     1.3    54.9    +      -       -      +
    167C  CYS*     3.2     7.8    +      -       +      +
    168C  SER*     2.9    26.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 165 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     83C  GLN*     3.2    29.4    -      -       -      -
     84C  VAL*     3.7    23.9    +      -       -      -
     85C  ALA      4.3     0.4    -      -       -      -
     86C  MET*     4.0    17.0    -      -       +      -
     89C  SER*     3.0    22.2    +      -       -      +
     96C  ASP*     3.6    14.4    -      -       -      -
    100C  ASN*     4.2     0.2    -      -       -      -
    125C  THR*     2.8    42.7    -      -       +      +
    127C  LYS*     4.0    23.8    -      -       +      -
    163C  SER*     3.6     7.6    -      -       -      +
    164C  PRO*     1.3    77.1    -      -       -      +
    166C  GLY*     1.3    63.5    +      -       -      +
    168C  SER*     3.3     0.9    +      -       -      -
    169C  LYS*     3.0    42.2    +      -       +      +
   1400C  NAD      3.3    17.0    +      -       -      -
   1401C  CDP      6.0     1.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 166 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    125C  THR*     5.5     0.2    -      -       -      -
    127C  LYS*     4.3    17.0    -      -       -      -
    128C  VAL*     4.4     2.4    -      -       -      +
    161C  PHE*     3.6    12.6    -      -       -      +
    162C  HIS      3.3    16.8    -      -       -      -
    163C  SER*     2.9    11.3    +      -       -      -
    165C  TYR*     1.3    83.6    -      -       -      +
    167C  CYS*     1.3    55.6    +      -       -      +
    169C  LYS*     4.3     2.2    -      -       -      +
    170C  GLY*     2.8    27.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with CYS 167 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    171A  ALA*     5.7     0.5    -      -       -      +
    174A  GLN*     3.7    20.0    -      -       +      -
    175A  TYR*     3.6    30.4    -      -       +      -
    178A  ASP*     3.5    33.2    -      -       -      -
    161C  PHE*     3.6    24.4    -      -       +      -
    163C  SER      3.0    11.5    +      -       -      -
    164C  PRO      3.6     7.2    -      -       -      +
    166C  GLY*     1.3    78.7    -      -       -      +
    168C  SER*     1.3    58.9    +      -       -      +
    171C  ALA*     3.0    29.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 168 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    175A  TYR*     3.1    13.2    -      -       -      -
     96C  ASP*     2.6    32.6    +      -       -      -
    100C  ASN*     3.0    24.7    +      -       -      +
    101C  VAL*     3.4    26.5    -      -       -      +
    164C  PRO      2.9    12.0    +      -       -      -
    165C  TYR      3.3     3.3    +      -       -      -
    167C  CYS*     1.3    70.3    -      -       -      +
    169C  LYS*     1.3    67.8    +      -       -      +
    171C  ALA      3.4     0.3    +      -       -      -
    172C  ALA*     3.1    21.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 169 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     81C  ALA      5.4     0.6    +      -       -      -
     82C  GLY*     5.0     0.4    -      -       -      -
     83C  GLN      4.9     0.2    -      -       -      +
    100C  ASN*     3.8    22.7    +      -       -      +
    122C  TYR*     3.3    23.1    +      -       -      +
    123C  SER*     2.9    24.3    +      -       -      -
    124C  SER*     4.0    12.1    +      -       -      +
    125C  THR*     3.4    21.5    -      -       -      +
    128C  VAL*     4.4     2.0    -      -       +      -
    165C  TYR*     3.0    41.6    +      -       +      +
    166C  GLY      4.3     1.6    -      -       -      +
    168C  SER*     1.3    75.1    +      -       -      +
    170C  GLY*     1.3    61.1    +      -       -      +
    172C  ALA*     3.3     2.1    +      -       -      +
    173C  ASP*     2.9    29.9    +      -       -      +
   1400C  NAD      2.6    44.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 170 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128C  VAL*     3.6    15.4    -      -       -      +
    161C  PHE*     3.3    23.6    -      -       -      -
    166C  GLY      2.8    19.8    +      -       -      -
    169C  LYS*     1.3    78.2    -      -       -      +
    171C  ALA*     1.3    61.1    +      -       -      +
    173C  ASP*     3.2     3.5    -      -       -      +
    174C  GLN*     3.0    28.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 171 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    161A  PHE*     5.4     1.1    -      -       -      -
    167A  CYS      5.8     0.4    -      -       -      -
    171A  ALA*     3.6    31.2    -      -       +      -
    175A  TYR*     5.2     1.3    -      -       +      -
    101C  VAL*     4.2    19.7    -      -       +      -
    161C  PHE*     3.6     6.3    -      -       +      -
    167C  CYS      3.0    19.1    +      -       -      +
    168C  SER      3.9     3.4    -      -       -      +
    169C  LYS      3.3     0.2    -      -       -      -
    170C  GLY*     1.3    76.6    -      -       -      +
    172C  ALA*     1.3    64.8    +      -       -      +
    174C  GLN*     3.4     4.3    +      -       -      +
    175C  TYR*     3.0    32.8    +      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 172 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    100C  ASN      3.5    20.9    -      -       -      +
    101C  VAL*     4.7     2.5    -      -       -      +
    104C  THR*     3.7    14.9    -      -       +      +
    105C  LEU*     5.1     2.9    -      -       -      -
    122C  TYR*     3.2    32.1    -      -       +      +
    168C  SER      3.1    12.5    +      -       -      +
    169C  LYS      3.7     0.7    -      -       -      +
    170C  GLY      3.3     0.2    -      -       -      -
    171C  ALA*     1.3    77.5    -      -       -      +
    173C  ASP*     1.3    55.7    +      -       -      +
    175C  TYR*     3.3     6.2    +      -       -      +
    176C  MET*     2.9    33.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 173 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    122C  TYR*     3.9    11.4    -      -       -      -
    124C  SER*     2.8    27.2    +      -       -      +
    128C  VAL*     4.1     6.9    -      -       -      +
    159C  LEU*     6.1     0.4    -      -       -      -
    161C  PHE*     6.0     0.4    -      -       -      -
    169C  LYS      2.9    18.1    +      -       -      +
    170C  GLY*     3.2     8.5    -      -       -      +
    172C  ALA*     1.3    75.8    -      -       -      +
    174C  GLN*     1.3    70.4    +      -       -      +
    176C  MET*     3.1     6.9    +      -       -      +
    177C  LEU*     3.1    26.5    +      -       -      +
    189C  VAL*     3.5     8.4    -      -       -      +
    191C  ARG*     2.9    45.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 174 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    160A  ASP*     3.7    12.3    -      -       -      +
    161A  PHE*     3.1    61.3    +      -       +      +
    167A  CYS*     3.6     4.9    -      -       +      -
    159C  LEU*     3.6    17.3    -      -       -      +
    161C  PHE*     3.9    10.7    -      -       +      -
    170C  GLY      3.0    15.9    +      -       -      +
    171C  ALA      3.9     3.4    -      -       -      +
    173C  ASP*     1.3    97.3    +      -       -      +
    175C  TYR*     1.3    58.4    +      -       -      +
    177C  LEU*     3.2    12.0    +      -       -      +
    178C  ASP*     2.8    31.4    +      -       -      +
    181C  ARG*     5.5     1.8    +      -       -      -
    191C  ARG*     3.4    15.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 175 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     93A  PRO*     5.1     2.2    +      -       +      -
     96A  ASP*     4.2     1.2    +      -       -      -
     97A  PHE*     3.6    36.4    -      +       +      +
    101A  VAL*     4.8     2.0    -      -       +      -
    164A  PRO*     3.8    15.6    +      -       +      -
    167A  CYS*     3.5    37.2    -      -       +      -
    168A  SER*     3.3    28.7    +      -       -      -
    101C  VAL*     5.1     2.0    -      -       +      -
    105C  LEU*     3.7    34.5    -      -       +      -
    108C  LEU*     4.0     6.7    -      -       +      -
    171C  ALA*     3.0    32.3    +      -       +      +
    172C  ALA      3.6     4.7    -      -       -      +
    174C  GLN*     1.3    73.0    -      -       -      +
    176C  MET*     1.3    67.7    +      -       -      +
    178C  ASP*     5.5     0.2    -      -       +      -
    179C  TYR*     2.9    53.0    +      +       -      -
----------------------------------------------------------
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Residues in contact with MET 176 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     79C  HIS*     4.1     9.2    -      -       +      -
    104C  THR*     3.6    25.4    -      -       +      -
    107C  LEU*     4.7     3.4    -      -       +      -
    108C  LEU*     4.0    21.1    -      -       +      +
    120C  ILE*     4.1    18.2    -      -       +      +
    122C  TYR*     3.8    39.3    -      -       +      -
    172C  ALA      2.9    18.8    +      -       -      +
    173C  ASP      3.3     8.5    -      -       -      +
    175C  TYR*     1.3    79.2    -      -       -      +
    177C  LEU*     1.3    61.9    +      -       -      +
    179C  TYR*     3.5     0.5    +      -       -      +
    180C  ALA      3.4     8.7    +      -       -      -
    187C  THR*     2.8    46.6    +      -       -      +
    188C  VAL      5.1     0.2    -      -       -      +
    189C  VAL*     3.6    13.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 177 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    160A  ASP*     6.0     0.2    -      -       -      +
    173C  ASP*     3.1    27.4    +      -       -      +
    174C  GLN*     3.8    14.8    -      -       -      +
    176C  MET*     1.3    81.8    -      -       -      +
    178C  ASP*     1.3    63.2    +      -       -      +
    180C  ALA*     3.3    13.8    +      -       -      +
    181C  ARG*     3.4    35.2    +      -       -      +
    187C  THR*     4.4     3.6    -      -       -      +
    189C  VAL*     3.9    13.5    -      -       +      +
    191C  ARG*     3.8    14.1    -      -       -      +
    261C  GLY*     3.5    27.8    -      -       -      +
    262C  ASN*     3.5    23.6    -      -       -      +
    263C  ALA*     3.7     8.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 178 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    161A  PHE      4.0     0.2    -      -       -      -
    162A  HIS*     3.5     0.7    -      -       -      -
    163A  SER*     2.8    48.5    +      -       -      -
    164A  PRO*     3.2     7.6    -      -       -      +
    167A  CYS*     3.5    14.4    -      -       -      -
    174C  GLN      2.8    16.4    +      -       -      +
    175C  TYR*     4.0     2.5    -      -       -      +
    177C  LEU*     1.3    74.4    -      -       -      +
    179C  TYR*     1.3    63.3    +      -       +      +
    180C  ALA      3.1     2.0    -      -       -      -
    181C  ARG*     2.7    32.7    +      -       -      +
    182C  ILE*     2.8    50.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 179 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     93A  PRO*     3.5    16.6    -      -       +      +
    164A  PRO*     5.1     2.7    -      -       +      -
    105C  LEU*     3.9     9.8    -      -       +      +
    108C  LEU*     3.7    35.2    -      -       +      -
    109C  GLU*     2.6    34.4    +      -       -      +
    112C  ARG*     3.9    11.0    -      -       -      -
    175C  TYR*     2.9    47.2    +      +       -      +
    176C  MET      4.0     4.0    -      -       -      +
    178C  ASP*     1.3    78.6    -      -       +      +
    180C  ALA*     1.3    58.5    +      -       -      +
    183C  PHE*     3.0    50.0    +      +       -      +
    185C  LEU*     3.1    42.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 180 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    176C  MET      3.4     2.8    +      -       -      -
    177C  LEU      3.3    10.4    +      -       -      +
    178C  ASP      3.1     0.4    -      -       -      -
    179C  TYR*     1.3    78.9    -      -       -      +
    181C  ARG*     1.3    58.4    +      -       -      +
    184C  GLY*     2.9    19.6    +      -       -      -
    185C  LEU*     3.2    25.5    -      -       -      +
    187C  THR*     3.3    18.6    +      -       -      +
    260C  ARG*     3.0    17.7    +      -       -      +
    261C  GLY*     3.6    22.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 181 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    160A  ASP*     3.3    20.2    +      -       -      -
    161A  PHE      3.2    17.6    +      -       -      -
    162A  HIS*     3.3    30.4    +      -       -      -
    300A  GLU*     4.7     3.6    -      -       -      +
    301A  SER*     5.9     0.9    -      -       -      -
    174C  GLN*     4.9     2.0    +      -       -      -
    177C  LEU*     3.4    32.0    +      -       -      +
    178C  ASP*     2.7    46.8    +      -       -      +
    180C  ALA*     1.3    80.6    -      -       -      +
    182C  ILE*     1.3    69.5    +      -       +      +
    184C  GLY*     4.4     1.6    +      -       -      -
    261C  GLY      5.5     3.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 182 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     90A  ILE*     4.1    26.0    -      -       +      +
    163A  SER*     4.1    18.6    -      -       -      +
    164A  PRO*     4.4     0.9    -      -       +      -
    300A  GLU*     3.2    32.4    -      -       +      +
    301A  SER*     4.4    13.7    -      -       -      +
    178C  ASP*     2.8    40.4    +      -       -      +
    181C  ARG*     1.3    81.4    -      -       +      +
    183C  PHE*     1.3    96.5    +      -       +      +
    184C  GLY      3.5     0.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 183 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     90A  ILE*     3.5    30.7    -      -       +      -
     93A  PRO*     3.9    13.9    -      -       +      -
    164A  PRO*     4.1    14.6    -      -       +      -
    112C  ARG*     3.7    42.8    -      -       +      -
    116C  SER*     5.6     2.3    -      -       -      -
    178C  ASP*     5.8     0.2    -      -       -      -
    179C  TYR*     3.0    44.9    +      +       -      +
    182C  ILE*     1.3   105.1    -      -       +      +
    184C  GLY*     1.3    64.1    +      -       -      +
    185C  LEU*     3.3    11.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 184 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    116C  SER      4.8     2.9    -      -       -      +
    180C  ALA      2.9    16.9    +      -       -      -
    181C  ARG      4.3     1.4    +      -       -      -
    182C  ILE      3.5     2.2    -      -       -      -
    183C  PHE*     1.3    78.7    -      -       -      +
    185C  LEU*     1.3    67.1    +      -       -      +
    186C  ASN*     3.7     8.1    +      -       -      +
    260C  ARG*     3.5     9.7    +      -       -      -
----------------------------------------------------------
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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