Contacts of the helix formed by residues 157 - 180 (chain B) in PDB entry 6DWN


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 CYS 157 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    146B  SER      3.6    13.0    -      -       -      -
    147B  ILE*     3.0    30.3    -      -       -      +
    148B  ALA      3.0     9.2    -      -       -      +
    149B  SER*     4.0     3.1    -      -       -      +
    150B  ASP*     3.9     5.2    -      -       -      +
    156B  SER*     1.3    76.9    -      -       -      +
    158B  TYR*     1.3    67.5    +      -       -      +
    159B  LEU*     4.4     0.9    -      -       -      -
    160B  GLU*     3.4    24.3    +      -       -      -
    161B  GLU*     3.0    22.2    +      -       -      +
    359B  LEU*     4.2    16.6    -      -       -      -
    465B  TRP*     5.3     2.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 158 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    144B  SER      4.0    13.9    -      -       -      -
    145B  PHE*     3.6    49.7    -      +       +      +
    146B  SER      3.9     0.9    -      -       -      +
    148B  ALA*     3.1    24.4    +      -       +      -
    149B  SER      3.8    15.7    -      -       -      -
    150B  ASP*     3.3    25.6    +      -       +      +
    151B  PRO*     3.0    25.4    -      -       +      +
    157B  CYS*     1.3    74.7    -      -       -      +
    159B  LEU*     1.3    64.2    +      -       -      +
    161B  GLU*     3.1     5.9    +      -       -      +
    162B  HIS*     2.9    51.1    +      +       -      +
    278B  ILE      5.3     3.5    +      -       -      -
    279B  ARG      5.2     6.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 159 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    146B  SER*     2.8    29.0    +      -       -      +
    147B  ILE*     5.7     0.7    -      -       +      -
    157B  CYS*     4.4     3.4    -      -       -      -
    158B  TYR*     1.3    73.2    -      -       -      +
    160B  GLU*     1.3    64.9    +      -       -      +
    162B  HIS*     3.8     5.3    -      -       -      +
    163B  VAL*     3.0    46.9    +      -       +      +
    197B  VAL*     4.1    15.3    -      -       +      -
    201B  ILE*     4.2     9.2    -      -       +      -
    359B  LEU*     5.0     2.7    -      -       +      -
    462B  ILE*     4.0    40.4    -      -       +      +
    465B  TRP*     3.9    37.9    -      -       +      -
    466B  GLU*     4.3     8.1    -      -       +      +
    469B  LEU*     5.7     2.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 160 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    156B  SER*     3.7    13.7    +      -       -      +
    157B  CYS*     3.4    19.3    +      -       -      +
    158B  TYR      3.3     0.6    -      -       -      -
    159B  LEU*     1.3    79.0    -      -       -      +
    161B  GLU*     1.3    58.2    +      -       -      +
    164B  SER*     2.5    40.4    +      -       -      +
    357B  PRO      4.4     0.8    -      -       -      +
    358B  ARG*     3.1    50.2    +      -       -      +
    359B  LEU*     3.1    47.9    +      -       +      +
    360B  SER      5.4     0.4    +      -       -      -
    469B  LEU*     3.9    15.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 161 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    150B  ASP*     4.1    19.0    -      -       +      +
    153B  SER*     4.0    21.4    +      -       -      -
    155B  THR*     5.3     0.5    +      -       -      -
    156B  SER*     3.1    27.4    +      -       -      -
    157B  CYS      3.0    15.3    +      -       -      +
    158B  TYR*     3.5     4.5    -      -       -      +
    160B  GLU*     1.3    78.4    -      -       -      +
    162B  HIS*     1.3    66.0    +      -       +      +
    164B  SER*     3.5     6.4    +      -       -      -
    165B  LYS*     3.2    23.9    +      -       -      +
    356B  ARG*     5.9     1.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with HIS 162 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    145B  PHE      5.1     0.4    +      -       -      -
    150B  ASP*     5.6     2.0    -      -       -      -
    158B  TYR*     2.9    50.1    +      +       +      +
    159B  LEU*     3.8     4.0    -      -       -      +
    161B  GLU*     1.3    80.0    -      -       +      +
    163B  VAL*     1.3    63.1    +      -       -      +
    165B  LYS*     3.0    32.1    +      -       -      +
    166B  GLU*     3.0    20.2    +      -       +      +
    197B  VAL*     4.1    19.7    -      -       +      -
    200B  ALA*     4.1    27.7    +      -       +      +
    201B  ILE*     4.0    26.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 163 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    159B  LEU*     3.0    24.7    +      -       +      +
    162B  HIS*     1.3    75.3    -      -       -      +
    164B  SER*     1.3    58.3    +      -       -      +
    166B  GLU*     4.1     0.6    -      -       -      +
    167B  ALA*     2.8    29.5    +      -       -      +
    197B  VAL*     3.9    20.4    -      -       +      -
    466B  GLU*     3.9    24.7    -      -       +      -
    469B  LEU*     3.6    36.3    -      -       +      -
    470B  PHE*     3.7    29.6    -      -       +      +
    473B  ILE*     4.8     2.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 164 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    160B  GLU*     2.5    31.7    +      -       -      +
    161B  GLU*     3.7     8.0    -      -       -      -
    163B  VAL*     1.3    78.3    -      -       -      +
    165B  LYS*     1.3    64.0    +      -       -      +
    167B  ALA*     3.7     1.6    -      -       -      +
    168B  GLU*     3.3    25.6    +      -       -      +
    356B  ARG*     3.5    28.5    +      -       -      +
    357B  PRO      5.4     2.3    +      -       -      -
    469B  LEU*     4.8     2.4    -      -       -      +
    473B  ILE*     4.1    18.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 165 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    161B  GLU*     3.2     9.9    +      -       -      +
    162B  HIS*     3.0    27.6    +      -       -      +
    164B  SER*     1.3    78.9    -      -       -      +
    166B  GLU*     1.3    71.2    +      -       -      +
    168B  GLU*     3.2    16.6    +      -       -      +
    169B  VAL*     3.2    20.9    +      -       +      +
    200B  ALA*     5.7     4.4    -      -       -      +
    206B  ARG*     3.7    37.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 166 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    162B  HIS*     3.0    15.3    +      -       +      +
    163B  VAL      4.1     2.0    -      -       -      +
    165B  LYS*     1.3    82.5    +      -       -      +
    167B  ALA*     1.3    60.5    +      -       -      +
    169B  VAL*     3.2     7.1    +      -       -      +
    170B  LEU*     2.7    32.2    +      -       -      +
    193B  SER*     3.8    22.8    +      -       -      +
    196B  ASN*     3.3    26.9    +      -       +      +
    197B  VAL*     3.6    22.9    -      -       +      +
    206B  ARG*     2.9    48.0    +      -       -      +
    209B  HIS*     5.3     0.2    +      -       -      -
    470B  PHE*     4.4     4.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 167 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    163B  VAL*     2.8    23.2    +      -       +      +
    164B  SER      3.7     5.2    -      -       -      +
    165B  LYS      3.3     0.2    -      -       -      -
    166B  GLU*     1.3    74.5    -      -       -      +
    168B  GLU*     1.3    56.4    +      -       -      +
    170B  LEU*     3.3     6.6    +      -       -      +
    171B  ILE*     3.0    35.3    +      -       -      +
    470B  PHE*     4.2    14.0    -      -       +      -
    473B  ILE*     3.6    36.6    -      -       +      -
    474B  LEU*     4.3     8.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 168 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    164B  SER      3.3    13.9    +      -       -      +
    165B  LYS*     3.2    10.3    +      -       -      +
    167B  ALA*     1.3    75.6    -      -       +      +
    169B  VAL*     1.3    68.0    +      -       +      +
    171B  ILE*     3.1     7.2    +      -       -      +
    172B  SER*     2.9    28.1    +      -       -      +
    356B  ARG*     3.7    29.6    +      -       -      +
    473B  ILE*     5.0     3.1    -      -       -      +
    477B  ARG*     2.7    35.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 169 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    165B  LYS*     3.2    19.0    +      -       +      +
    166B  GLU*     3.2    11.5    +      -       -      +
    168B  GLU*     1.3    77.8    -      -       +      +
    170B  LEU*     1.3    54.1    +      -       -      +
    172B  SER*     3.4     6.9    +      -       -      -
    173B  THR*     2.7    40.7    +      -       -      +
    206B  ARG*     3.7    29.6    -      -       -      +
    209B  HIS*     3.4    27.1    -      -       +      +
    208C  ASP*     5.3    11.7    -      -       -      +
    210C  ASN*     6.4     1.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 170 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    166B  GLU      2.7    20.1    +      -       -      +
    167B  ALA*     3.6     4.9    -      -       -      +
    169B  VAL*     1.3    74.3    -      -       -      +
    171B  ILE*     1.3    61.7    +      -       -      +
    173B  THR*     3.3     4.2    +      -       -      -
    174B  LEU*     3.0    45.2    +      -       +      +
    189B  TYR*     3.8    31.6    -      -       +      +
    190B  VAL*     4.4    18.6    -      -       +      +
    193B  SER*     3.4    28.0    +      -       -      +
    209B  HIS*     4.4     2.9    -      -       +      -
    326B  ILE*     6.3     1.1    -      -       +      -
    470B  PHE*     4.5    12.3    -      -       +      -
    474B  LEU*     4.0    30.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 171 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    167B  ALA      3.0    18.8    +      -       -      +
    168B  GLU*     3.1     6.9    +      -       -      +
    170B  LEU*     1.3    74.8    -      -       -      +
    172B  SER*     1.3    63.7    +      -       -      +
    174B  LEU*     3.3     8.1    +      -       +      +
    175B  GLN*     3.0    48.9    +      -       +      +
    473B  ILE*     4.1    22.0    -      -       +      +
    474B  LEU*     4.1    19.7    -      -       +      -
    477B  ARG*     3.4    43.5    -      -       +      +
    478B  VAL*     4.6    18.4    -      -       +      -
    508B  MET*     4.4     1.9    -      -       +      +
    510B  LEU*     5.6     0.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 172 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    168B  GLU*     2.9    17.5    +      -       -      +
    169B  VAL*     3.8     7.4    -      -       -      -
    171B  ILE*     1.3    77.8    -      -       -      +
    173B  THR*     1.3    62.7    +      -       -      +
    175B  GLN*     3.2    15.3    +      -       -      +
    176B  GLU*     3.2    29.1    +      -       -      +
    208C  ASP*     4.2    28.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with THR 173 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    169B  VAL*     2.7    26.0    +      -       -      +
    170B  LEU*     3.3     5.3    +      -       -      -
    172B  SER*     1.3    76.8    -      -       -      +
    174B  LEU*     1.3    61.3    +      -       -      +
    176B  GLU*     3.7    17.4    +      -       -      +
    177B  LEU*     3.3    22.2    +      -       +      +
    189B  TYR*     3.6    26.2    -      -       +      -
    209B  HIS*     3.5    40.9    +      -       +      +
    210B  ASN*     6.2     0.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 174 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    170B  LEU*     3.0    39.4    +      -       +      +
    171B  ILE*     3.8     3.8    -      -       +      +
    172B  SER      3.2     0.2    -      -       -      -
    173B  THR*     1.3    76.8    -      -       -      +
    175B  GLN*     1.3    64.2    +      -       -      +
    176B  GLU      3.2     0.4    -      -       -      -
    177B  LEU*     3.2    23.3    +      -       +      +
    178B  MET*     3.2    17.8    +      -       -      +
    184B  PHE*     3.4    37.5    -      -       +      -
    186B  PRO*     5.5     1.1    -      -       +      -
    189B  TYR*     4.5    15.9    -      -       +      -
    190B  VAL*     6.5     0.4    -      -       +      -
    474B  LEU*     5.3     2.9    -      -       +      -
    480B  PHE*     4.2    20.6    -      -       +      -
    508B  MET*     3.7    28.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 175 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    171B  ILE*     3.0    34.5    +      -       -      +
    172B  SER*     3.2    16.0    +      -       -      +
    174B  LEU*     1.3    76.6    -      -       -      +
    176B  GLU*     1.3    62.9    +      -       +      +
    178B  MET*     3.3     5.8    +      -       -      +
    179B  ALA*     3.1    20.8    +      -       -      +
    508B  MET*     3.6    17.5    -      -       +      -
    510B  LEU*     4.0    29.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 176 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    172B  SER*     3.2    19.6    +      -       -      +
    173B  THR*     3.7    16.6    +      -       -      +
    174B  LEU      3.2     0.4    -      -       -      -
    175B  GLN*     1.3    77.5    -      -       +      +
    177B  LEU*     1.3    62.3    +      -       +      +
    179B  ALA*     3.1    17.8    +      -       -      +
    180B  GLY*     3.3     9.7    +      -       -      -
    181B  PRO*     4.7     0.7    -      -       -      +
    205C  ARG*     4.8     5.0    +      -       -      +
    206C  ARG      4.9     6.7    -      -       -      +
    207C  TYR*     4.2    18.1    -      -       +      -
    208C  ASP*     4.5    11.1    +      -       -      +
    211C  HIS*     3.0    42.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 177 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    173B  THR*     3.3    18.1    +      -       +      +
    174B  LEU*     3.2    16.0    +      -       +      +
    176B  GLU*     1.3    79.4    -      -       +      +
    178B  MET*     1.3    60.1    +      -       -      +
    181B  PRO*     3.2    23.5    -      -       +      +
    182B  GLY*     2.9    22.7    +      -       -      -
    183B  HIS      4.1     3.4    +      -       -      +
    184B  PHE*     3.7    24.9    -      -       +      -
    189B  TYR*     3.2    55.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with MET 178 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    174B  LEU      3.2    13.6    +      -       -      +
    175B  GLN*     3.8     8.5    -      -       -      +
    176B  GLU      3.3     0.2    -      -       -      -
    177B  LEU*     1.3    75.2    -      -       -      +
    179B  ALA*     1.3    65.3    +      -       -      +
    180B  GLY      3.5     0.7    +      -       -      +
    182B  GLY*     3.3    43.5    -      -       -      +
    184B  PHE*     4.1    11.0    -      -       +      -
    507B  GLN*     4.0    14.4    -      -       +      -
    508B  MET*     3.3    55.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 179 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    175B  GLN      3.1    11.4    +      -       -      +
    176B  GLU*     3.1    14.6    +      -       -      +
    178B  MET*     1.3    78.8    -      -       -      +
    180B  GLY*     1.3    58.8    +      -       -      +
    204C  GLY      6.0     0.4    -      -       -      +
    205C  ARG*     3.4    38.8    +      -       +      +
    268C  GLU*     5.3     3.1    -      -       -      +
    272C  THR*     5.4     4.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 180 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    176B  GLU      3.3     8.6    +      -       -      -
    178B  MET      3.3     0.7    -      -       -      +
    179B  ALA*     1.3    82.1    -      -       -      +
    181B  PRO*     1.3    74.7    -      -       -      +
    182B  GLY*     3.1     2.2    +      -       -      -
    205C  ARG*     4.0     1.1    -      -       -      +
    268C  GLU*     3.7    33.0    -      -       -      +
    272C  THR*     4.4    15.6    -      -       -      +
----------------------------------------------------------
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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