Contacts of the helix formed by residues 164 - 185 (chain E) in PDB entry 1Z6Z


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 TRP 164 (chain E).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101E  LEU*     4.9     7.0    -      -       +      -
    104E  VAL*     3.6    22.9    -      -       +      +
    156E  CYS*     3.5    33.2    -      -       -      -
    161E  PHE*     3.1    31.5    +      +       +      +
    162E  LYS      3.5    12.4    +      -       -      -
    163E  GLY*     1.3    85.6    -      -       -      +
    165E  ALA*     1.3    64.9    +      -       -      +
    166E  LEU      3.4     2.5    -      -       -      -
    167E  TYR*     3.3    15.2    +      +       +      -
    168E  CYS*     2.9    28.9    +      -       -      +
    203E  GLN*     5.9     3.6    -      -       -      -
    206E  ALA*     3.7    29.6    -      -       +      -
    210E  SER*     3.1    24.9    +      -       -      -
    215E  MET*     5.5     7.4    -      -       +      +
    219E  LEU*     4.1    19.5    -      -       +      -
    410E   CL      4.6     9.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 165 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108E  PHE*     3.9    29.4    -      -       +      +
    111E  LEU*     3.9    17.0    -      -       +      +
    163E  GLY      3.4     4.2    +      -       -      -
    164E  TRP*     1.3    75.4    -      -       -      +
    166E  LEU*     1.3    58.2    +      -       -      +
    168E  CYS*     3.9     0.9    -      -       -      +
    169E  ALA*     3.0    32.4    +      -       -      +
    177F  LEU*     3.8    13.6    -      -       +      +
    180F  VAL*     3.9    22.2    -      -       +      +
    184F  GLU*     4.9     2.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 166 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101E  LEU      4.9     3.4    -      -       -      +
    102E  GLY*     5.2     7.0    -      -       -      -
    103E  ASP      5.3     4.0    -      -       -      +
    111E  LEU*     4.1    27.5    -      -       +      +
    116E  GLN*     5.0     7.2    -      -       -      +
    117E  VAL*     4.1    16.4    -      -       +      -
    120E  TYR*     3.3    47.4    -      -       +      -
    121E  TRP*     3.7    32.6    -      -       +      -
    164E  TRP      3.4     0.4    -      -       -      -
    165E  ALA*     1.3    78.0    -      -       -      +
    167E  TYR*     1.3    57.5    +      -       -      +
    169E  ALA*     3.9     0.9    -      -       -      +
    170E  GLY      2.9    24.8    +      -       -      -
    129F  LEU*     3.8    21.5    -      -       +      -
    177F  LEU*     5.0     0.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 167 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    100E  SER      3.5    23.6    -      -       -      -
    101E  LEU*     3.7    32.6    +      -       +      +
    104E  VAL*     5.6     0.2    -      -       +      -
    120E  TYR*     3.3     8.6    +      -       -      -
    154E  SER*     3.9     2.8    -      -       -      -
    156E  CYS*     3.6    30.3    -      -       +      -
    164E  TRP*     3.3    17.1    +      +       +      +
    166E  LEU*     1.3    78.6    -      -       -      +
    168E  CYS*     1.3    62.8    +      -       -      +
    170E  GLY*     3.3     1.7    +      -       -      -
    171E  LYS*     3.0    43.8    +      -       +      +
    202E  MET*     4.0    12.8    -      -       -      -
    410E   CL      2.9    33.9    -      -       +      +
    805E  NAP      2.7    38.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with CYS 168 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    156E  CYS*     3.5    33.7    -      -       -      +
    159E  GLN      3.6    22.2    -      -       -      -
    160E  PRO*     4.1     0.7    -      -       -      -
    161E  PHE*     3.8    19.3    -      -       -      -
    164E  TRP*     2.9    29.7    +      -       -      +
    165E  ALA      4.0     2.0    -      -       -      +
    167E  TYR*     1.3    74.4    -      -       -      +
    169E  ALA*     1.3    58.4    +      -       -      +
    171E  LYS      3.2     1.0    +      -       -      -
    172E  ALA*     2.9    30.5    +      -       -      +
    176F  MET*     3.6    17.3    -      -       +      -
    180F  VAL*     4.2     4.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 169 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121E  TRP*     3.9    12.3    -      -       +      -
    165E  ALA      3.0    19.5    +      -       -      +
    166E  LEU      3.9     2.7    -      -       -      +
    168E  CYS*     1.3    76.2    -      -       -      +
    170E  GLY*     1.3    58.7    +      -       -      +
    172E  ALA*     3.4     1.4    +      -       -      +
    173E  ALA*     2.9    30.7    +      -       -      +
    173F  ALA*     3.7    17.3    -      -       +      +
    176F  MET*     3.7    11.8    -      -       -      +
    177F  LEU*     3.8    29.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 170 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    120E  TYR*     4.8     7.2    -      -       -      -
    121E  TRP*     4.0     9.5    -      -       -      -
    124E  ASN*     5.3     3.1    -      -       -      -
    125E  LEU*     3.5    16.2    -      -       -      +
    166E  LEU      2.9    17.8    +      -       -      -
    167E  TYR      3.7     1.8    -      -       -      -
    169E  ALA*     1.3    76.3    -      -       -      +
    171E  LYS*     1.3    56.3    +      -       -      +
    173E  ALA      3.3     1.0    +      -       -      -
    174E  ARG*     2.9    38.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 171 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99E  GLY*     5.3     3.6    -      -       -      -
    124E  ASN*     5.5     2.4    +      -       -      -
    151E  ASN*     5.0     0.2    +      -       -      -
    152E  ILE      3.0    25.2    +      -       -      +
    153E  SER*     4.3    14.1    -      -       -      -
    154E  SER*     4.0    12.3    -      -       -      -
    156E  CYS*     4.2     1.1    -      -       +      -
    157E  ALA*     3.6    27.0    -      -       +      +
    167E  TYR*     3.0    41.0    +      -       +      +
    168E  CYS      3.2     2.0    +      -       -      +
    170E  GLY*     1.3    72.8    -      -       -      +
    172E  ALA*     1.3    65.3    +      -       -      +
    174E  ARG*     3.4    26.7    +      -       +      +
    175E  ASP*     3.0    26.7    +      -       -      +
    805E  NAP      3.0    37.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 172 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    157E  ALA*     3.6    24.0    -      -       -      +
    168E  CYS      2.9    17.6    +      -       -      +
    169E  ALA      3.7     3.6    -      -       -      +
    171E  LYS*     1.3    77.1    -      -       -      +
    173E  ALA*     1.3    61.2    +      -       -      +
    175E  ASP*     3.5     4.2    +      -       -      +
    176E  MET*     3.1    23.4    +      -       -      +
    172F  ALA*     4.2    16.4    -      -       +      +
    176F  MET*     4.0    21.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 173 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    125E  LEU*     3.6    28.0    -      -       +      -
    169E  ALA      2.9    17.4    +      -       -      +
    172E  ALA*     1.3    74.1    -      -       -      +
    174E  ARG*     1.3    60.3    +      -       -      +
    176E  MET*     3.2     2.6    +      -       -      +
    177E  LEU*     2.9    34.2    +      -       -      +
    169F  ALA*     3.5    34.2    -      -       +      +
    172F  ALA*     4.8     0.4    -      -       -      -
    173F  ALA*     4.1     7.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 174 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     96E  ASN*     3.2    26.9    +      -       -      +
     98E  ALA      3.8    17.3    +      -       -      -
    123E  LEU      5.1     1.0    +      -       -      -
    124E  ASN*     2.9    42.2    +      -       -      +
    125E  LEU*     3.9     5.4    -      -       +      -
    128E  MET*     3.5    32.2    -      -       +      +
    151E  ASN*     2.9    38.9    +      -       -      +
    152E  ILE      3.5     8.1    +      -       -      -
    170E  GLY      2.9    22.0    +      -       -      +
    171E  LYS*     3.6    31.5    -      -       +      +
    173E  ALA*     1.3    75.3    -      -       -      +
    175E  ASP*     1.3    62.5    +      -       -      +
    177E  LEU*     3.3    10.0    +      -       -      +
    178E  PHE*     3.1    26.5    +      -       -      +
    805E  NAP      4.5     1.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 175 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    151E  ASN*     3.1    14.4    +      -       -      -
    153E  SER*     2.6    25.9    +      -       -      -
    157E  ALA*     3.7    12.2    -      -       +      +
    158E  LEU*     4.7     5.1    -      -       +      +
    171E  LYS      3.0    11.7    +      -       -      +
    172E  ALA*     3.7     5.4    -      -       -      +
    173E  ALA      3.3     0.2    -      -       -      -
    174E  ARG*     1.3    76.1    -      -       -      +
    176E  MET*     1.3    58.1    +      -       -      +
    178E  PHE      3.4     0.7    +      -       -      -
    179E  GLN*     2.9    39.7    +      -       -      +
    192E  ASN*     3.4    19.7    +      -       -      +
    252E  HIS*     2.8    32.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 176 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    172E  ALA      3.1    17.2    +      -       -      +
    173E  ALA      3.2     3.3    +      -       -      +
    175E  ASP*     1.3    75.8    -      -       -      +
    177E  LEU*     1.3    65.1    +      -       -      +
    179E  GLN*     3.2    16.2    +      -       -      +
    180E  VAL*     3.0    23.1    +      -       -      +
    156F  CYS      3.7     7.0    -      -       -      +
    157F  ALA      3.5    24.9    -      -       -      +
    158F  LEU      3.7    22.9    -      -       -      +
    159F  GLN      3.9     2.2    -      -       -      +
    160F  PRO*     3.9    29.4    -      -       +      -
    168F  CYS*     3.6    35.7    -      -       +      +
    169F  ALA*     3.7     3.1    -      -       -      +
    172F  ALA*     4.0     9.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 177 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    125E  LEU*     4.6     9.6    -      -       +      +
    128E  MET*     4.1    22.4    -      -       -      -
    129E  LEU*     4.1    36.6    -      -       +      -
    173E  ALA      2.9    19.3    +      -       -      +
    174E  ARG*     3.5    10.1    -      -       -      +
    176E  MET*     1.3    73.7    -      -       -      +
    178E  PHE*     1.3    65.2    +      -       +      +
    180E  VAL*     3.2     8.8    +      -       -      +
    181E  LEU      3.0    22.3    +      -       -      -
    108F  PHE*     3.6    14.8    -      -       +      -
    121F  TRP*     4.8     9.4    -      -       +      -
    165F  ALA*     3.7    36.1    -      -       +      +
    166F  LEU      4.6     0.4    -      -       -      +
    169F  ALA*     3.7    10.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 178 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     96E  ASN*     3.4    23.6    -      -       -      -
    128E  MET*     3.7    21.1    -      -       +      -
    132E  THR*     3.6    30.1    -      -       +      -
    149E  VAL*     3.7    17.5    -      -       +      -
    150E  VAL      3.7     3.8    -      -       -      -
    151E  ASN*     3.6    33.4    -      -       +      -
    174E  ARG      3.1    11.1    +      -       -      +
    175E  ASP      3.8     0.7    -      -       -      +
    177E  LEU*     1.3    85.9    -      -       +      +
    179E  GLN*     1.3    59.1    +      -       -      +
    181E  LEU*     3.4     6.8    +      -       +      +
    182E  ALA*     2.9    24.9    +      -       -      +
    190E  VAL*     3.4    32.6    -      -       +      +
    191E  LEU      4.2     2.0    -      -       -      -
    192E  ASN*     3.4    22.0    -      -       -      +
    250E  GLY*     5.1     0.2    -      -       -      -
    108F  PHE*     4.5     5.6    -      +       -      -
----------------------------------------------------------
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Residues in contact with GLN 179 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    175E  ASP*     2.9    31.9    +      -       -      +
    176E  MET*     3.2    23.9    +      -       -      +
    178E  PHE*     1.3    75.5    -      -       -      +
    180E  VAL*     1.3    62.2    +      -       -      +
    182E  ALA*     3.5     7.8    +      -       -      +
    183E  LEU*     3.4    24.4    +      -       -      +
    192E  ASN*     4.4     1.1    -      -       -      +
    250E  GLY*     3.6    22.4    -      -       -      +
    158F  LEU      5.0     2.5    +      -       -      +
    160F  PRO*     3.9    30.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 180 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    176E  MET      3.0    19.0    +      -       -      +
    177E  LEU      3.5     7.0    -      -       -      +
    179E  GLN*     1.3    74.3    -      -       -      +
    181E  LEU*     1.3    66.8    +      -       -      +
    183E  LEU*     3.1     7.1    +      -       -      +
    184E  GLU*     3.0    39.6    +      -       -      +
    108F  PHE*     5.1     0.4    -      -       +      -
    160F  PRO*     3.8    25.4    -      -       +      -
    161F  PHE      3.4    22.4    -      -       -      +
    163F  GLY      4.2     0.4    -      -       -      +
    165F  ALA*     3.9    27.1    -      -       +      +
    168F  CYS*     4.0    19.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 181 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132E  THR*     3.9    19.3    -      -       +      -
    136E  LEU*     3.8    13.9    -      -       +      -
    149E  VAL*     3.7    30.3    -      -       +      -
    177E  LEU      3.0    13.4    +      -       -      +
    178E  PHE*     3.7    13.0    -      -       +      +
    180E  VAL*     1.3    77.1    -      -       -      +
    182E  ALA*     1.3    57.1    +      -       -      +
    184E  GLU*     4.4     4.0    -      -       -      -
    185E  GLU*     2.8    56.4    +      -       +      +
    188E  VAL*     4.9     0.7    -      -       +      -
    190E  VAL*     4.0     9.0    -      -       +      -
    108F  PHE*     3.6    38.1    -      -       +      -
    109F  VAL*     5.3     0.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 182 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    178E  PHE      2.9    17.8    +      -       -      +
    179E  GLN      3.7     6.1    -      -       -      +
    180E  VAL      3.3     0.4    -      -       -      -
    181E  LEU*     1.3    76.2    -      -       -      +
    183E  LEU*     1.3    62.3    +      -       +      +
    185E  GLU      3.9    14.1    -      -       -      +
    186E  PRO*     4.0     6.9    -      -       -      +
    190E  VAL*     3.8    11.2    -      -       +      +
    249E  SER*     3.6    28.2    +      -       -      +
    250E  GLY*     3.7    20.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 183 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    179E  GLN      3.4     8.9    +      -       -      +
    180E  VAL      3.1     9.2    +      -       -      +
    182E  ALA*     1.3    80.9    -      -       +      +
    184E  GLU*     1.3    61.9    +      -       -      +
    186E  PRO*     4.1    11.3    -      -       -      +
    160F  PRO*     3.5    42.6    -      -       +      +
    161F  PHE*     4.4     6.7    -      -       +      +
    162F  LYS*     3.6    34.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 184 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    180E  VAL*     3.0    28.5    +      -       -      +
    181E  LEU*     3.8     4.7    -      -       -      +
    183E  LEU*     1.3    77.5    -      -       -      +
    185E  GLU*     1.3    75.9    +      -       +      +
    186E  PRO*     3.3     8.4    -      -       -      +
    107F  GLY*     3.5     8.7    -      -       -      -
    108F  PHE*     3.1    37.4    +      -       +      +
    162F  LYS*     3.7    16.8    -      -       +      +
    163F  GLY*     2.8    38.8    +      -       -      +
    165F  ALA*     4.9     1.0    -      -       -      +
    211F  VAL*     5.9     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 185 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    136E  LEU*     5.3     0.7    -      -       +      -
    147E  ARG*     3.8    17.4    +      -       -      -
    181E  LEU*     2.8    32.1    +      -       +      +
    182E  ALA      3.9     6.0    -      -       -      +
    184E  GLU*     1.3    92.2    -      -       +      +
    186E  PRO*     1.3    60.9    -      -       -      +
    187E  ASN*     3.1     5.6    +      -       -      +
    188E  VAL*     2.8    43.1    +      -       +      +
    108F  PHE*     5.8     0.4    -      -       +      -
    109F  VAL*     4.1    23.8    -      -       +      +
----------------------------------------------------------
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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