Contacts of the helix formed by residues 164 - 185 (chain B) 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 B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101B  LEU*     4.9     6.3    -      -       +      -
    104B  VAL*     3.6    23.2    -      -       +      +
    156B  CYS*     3.5    33.2    -      -       -      -
    161B  PHE*     3.1    30.7    +      +       +      +
    162B  LYS      3.5    11.0    +      -       -      -
    163B  GLY*     1.3    86.2    -      -       -      +
    165B  ALA*     1.3    63.6    +      -       -      +
    166B  LEU      3.4     2.7    -      -       -      -
    167B  TYR*     3.3    16.3    +      +       +      -
    168B  CYS*     2.9    30.7    +      -       -      -
    203B  GLN*     5.9     3.4    -      -       -      -
    206B  ALA*     3.7    28.0    -      -       +      -
    210B  SER*     3.1    25.6    +      -       -      -
    215B  MET*     4.1    23.8    -      -       +      +
    219B  LEU*     4.1    11.7    -      -       +      -
    408B   CL      4.5    10.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 165 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    177A  LEU*     3.7    13.4    -      -       +      +
    180A  VAL*     3.8    29.4    -      -       +      +
    184A  GLU*     4.9     2.0    -      -       -      +
    108B  PHE*     3.9    23.8    -      -       +      -
    111B  LEU*     3.9    17.0    -      -       +      +
    163B  GLY      3.5     4.0    +      -       -      -
    164B  TRP*     1.3    75.2    -      -       -      +
    166B  LEU*     1.3    62.4    +      -       -      +
    168B  CYS*     4.0     1.0    -      -       -      +
    169B  ALA*     3.0    27.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 166 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    129A  LEU*     3.8    22.4    -      -       +      -
    177A  LEU*     4.8     0.4    -      -       +      -
    101B  LEU      5.0     2.5    -      -       -      +
    102B  GLY*     5.2     6.5    -      -       -      -
    103B  ASP      5.4     4.5    -      -       -      +
    111B  LEU*     4.1    27.1    -      -       +      +
    116B  GLN*     4.9     7.0    -      -       -      +
    117B  VAL*     4.1    16.6    -      -       +      -
    120B  TYR*     3.3    46.1    -      -       +      -
    121B  TRP*     3.7    32.8    -      -       +      -
    164B  TRP      3.4     0.4    -      -       -      -
    165B  ALA*     1.3    79.7    -      -       -      +
    167B  TYR*     1.3    58.1    +      -       -      +
    169B  ALA*     3.9     0.9    -      -       -      +
    170B  GLY      2.9    24.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 167 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    100B  SER      3.5    22.9    -      -       -      -
    101B  LEU*     3.7    33.9    +      -       +      +
    104B  VAL*     5.5     0.2    -      -       +      -
    120B  TYR*     3.3     8.1    +      -       -      -
    124B  ASN*     5.9     0.2    -      -       -      -
    154B  SER*     3.8     3.3    -      -       -      -
    156B  CYS*     3.6    37.7    -      -       +      -
    164B  TRP*     3.3    17.8    +      +       +      +
    166B  LEU*     1.3    78.8    -      -       -      +
    168B  CYS*     1.3    61.4    +      -       -      +
    170B  GLY*     3.3     1.9    +      -       -      -
    171B  LYS*     3.0    44.0    +      -       +      +
    202B  MET*     4.0    12.7    -      -       -      -
    408B   CL      3.4    21.8    -      -       +      +
    802B  NAP      2.7    42.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with CYS 168 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    176A  MET*     3.5    22.4    -      -       +      +
    180A  VAL*     4.1     4.0    -      -       +      -
    156B  CYS*     3.5    30.2    -      -       -      +
    159B  GLN      3.7    20.4    -      -       -      -
    160B  PRO*     4.1     0.7    -      -       -      -
    161B  PHE*     3.8    19.1    -      -       -      -
    164B  TRP*     2.9    34.0    +      -       -      +
    165B  ALA      4.1     2.0    -      -       -      +
    167B  TYR*     1.3    72.9    -      -       -      +
    169B  ALA*     1.3    57.5    +      -       -      +
    171B  LYS      3.3     0.5    +      -       -      -
    172B  ALA*     2.9    30.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 169 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    173A  ALA*     3.6    27.8    -      -       +      +
    176A  MET*     3.7    11.3    -      -       -      +
    177A  LEU*     3.7    18.8    -      -       +      +
    121B  TRP*     3.8    14.6    -      -       +      -
    165B  ALA      3.0    19.1    +      -       -      +
    168B  CYS*     1.3    77.1    -      -       -      +
    170B  GLY*     1.3    58.8    +      -       -      +
    172B  ALA*     3.3     1.9    +      -       -      +
    173B  ALA*     3.0    30.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 170 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    120B  TYR*     4.7     6.5    -      -       -      -
    121B  TRP*     3.9    10.0    -      -       -      -
    124B  ASN*     5.3     2.7    -      -       -      -
    125B  LEU*     3.4    16.6    -      -       -      +
    166B  LEU      2.9    17.4    +      -       -      -
    167B  TYR      3.7     1.1    -      -       -      -
    169B  ALA*     1.3    78.4    -      -       -      +
    171B  LYS*     1.3    56.4    +      -       -      +
    174B  ARG*     2.9    38.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 171 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99B  GLY*     5.3     3.0    -      -       -      -
    124B  ASN*     5.5     2.7    +      -       -      -
    152B  ILE      3.0    21.8    +      -       -      +
    153B  SER*     4.2    12.3    -      -       -      -
    154B  SER*     4.0    12.8    -      -       -      -
    156B  CYS      4.2     0.7    -      -       -      -
    157B  ALA*     3.5    31.8    -      -       +      +
    167B  TYR*     3.0    41.0    +      -       +      +
    168B  CYS      3.9     1.3    -      -       -      +
    170B  GLY*     1.3    73.3    -      -       -      +
    172B  ALA*     1.3    66.8    +      -       -      +
    174B  ARG*     3.4    27.3    +      -       +      +
    175B  ASP*     3.0    20.4    +      -       -      +
    802B  NAP      2.9    44.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 172 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    172A  ALA*     4.0    25.3    -      -       +      +
    176A  MET*     4.1    10.8    -      -       +      -
    157B  ALA*     3.6    24.8    -      -       -      +
    168B  CYS      2.9    17.8    +      -       -      +
    169B  ALA      3.8     4.5    -      -       -      +
    171B  LYS*     1.3    76.8    -      -       -      +
    173B  ALA*     1.3    62.2    +      -       -      +
    175B  ASP*     3.5     4.3    +      -       -      +
    176B  MET*     3.1    22.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 173 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    169A  ALA*     3.5    36.7    -      -       +      +
    172A  ALA*     4.7     0.2    -      -       -      +
    173A  ALA*     4.0     6.5    -      -       +      +
    125B  LEU*     3.6    25.6    -      -       +      -
    169B  ALA      3.0    17.5    +      -       -      +
    172B  ALA*     1.3    74.7    -      -       -      +
    174B  ARG*     1.3    58.9    +      -       -      +
    176B  MET*     3.1     2.4    +      -       -      -
    177B  LEU*     2.8    34.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 174 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     96B  ASN*     3.3    28.1    +      -       -      +
     98B  ALA      3.8    18.5    +      -       -      -
     99B  GLY*     5.8     0.2    -      -       -      -
    123B  LEU      5.1     0.6    +      -       -      -
    124B  ASN*     2.8    41.0    +      -       -      +
    125B  LEU*     3.9     5.6    -      -       +      -
    128B  MET*     3.5    29.4    -      -       +      +
    151B  ASN*     2.9    39.7    +      -       -      +
    152B  ILE      3.4     8.9    +      -       -      -
    170B  GLY      2.9    24.2    +      -       -      +
    171B  LYS*     3.7    32.4    -      -       +      +
    172B  ALA      3.4     0.2    -      -       -      -
    173B  ALA*     1.3    76.2    -      -       -      +
    175B  ASP*     1.3    62.6    +      -       -      +
    177B  LEU*     3.4     9.8    +      -       -      +
    178B  PHE*     3.2    26.3    +      -       -      +
    802B  NAP      4.5     1.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 175 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    151B  ASN*     3.1    14.7    +      -       -      -
    153B  SER*     2.7    25.0    +      -       -      -
    157B  ALA*     3.8    11.8    -      -       +      +
    158B  LEU*     4.7     5.1    -      -       +      +
    171B  LYS      3.0    14.0    +      -       -      +
    172B  ALA*     3.7     5.4    -      -       -      +
    173B  ALA      3.3     0.2    -      -       -      -
    174B  ARG*     1.3    75.8    -      -       -      +
    176B  MET*     1.3    57.1    +      -       -      +
    178B  PHE      3.4     1.4    +      -       -      -
    179B  GLN*     2.9    41.4    +      -       -      +
    192B  ASN*     3.4    19.6    +      -       -      +
    252B  HIS*     2.8    32.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 176 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    156A  CYS      3.6    16.8    -      -       -      +
    157A  ALA      3.6    18.2    -      -       -      +
    158A  LEU      3.7    21.1    -      -       -      +
    159A  GLN      3.8     2.7    -      -       -      +
    160A  PRO*     3.7    24.5    -      -       +      -
    168A  CYS*     3.4    40.4    -      -       +      +
    169A  ALA*     3.6     2.5    -      -       -      +
    172A  ALA*     4.0    10.1    -      -       +      -
    172B  ALA      3.1    15.8    +      -       -      +
    173B  ALA      3.1     5.8    +      -       -      +
    175B  ASP*     1.3    74.4    -      -       -      +
    177B  LEU*     1.3    66.1    +      -       -      +
    179B  GLN*     3.2    14.6    +      -       -      +
    180B  VAL*     3.0    22.6    +      -       -      +
----------------------------------------------------------
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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
----------------------------------------------------------
    108A  PHE*     3.6    15.1    -      -       +      -
    121A  TRP*     4.7     9.6    -      -       +      -
    165A  ALA*     3.6    36.1    -      -       +      +
    166A  LEU      4.4     0.7    -      -       -      +
    169A  ALA*     3.6    12.3    -      -       +      +
    125B  LEU*     4.6     8.7    -      -       +      +
    128B  MET*     4.1    22.4    -      -       -      -
    129B  LEU*     4.1    35.9    -      -       +      -
    173B  ALA      2.8    18.7    +      -       -      +
    174B  ARG*     3.4    10.1    +      -       -      +
    176B  MET*     1.3    74.6    -      -       -      +
    178B  PHE*     1.3    63.8    +      -       +      +
    180B  VAL*     3.1     9.4    +      -       -      +
    181B  LEU      2.9    23.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 178 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108A  PHE*     4.3     9.4    -      +       -      -
     96B  ASN*     3.5    22.9    -      -       -      -
    128B  MET*     3.7    21.3    -      -       +      -
    132B  THR*     3.6    28.5    -      -       +      -
    149B  VAL*     3.6    18.4    -      -       +      -
    150B  VAL      3.7     4.0    -      -       -      -
    151B  ASN*     3.5    33.7    -      -       +      -
    174B  ARG      3.2    10.8    +      -       -      +
    175B  ASP      3.9     0.7    -      -       -      +
    177B  LEU*     1.3    83.1    -      -       +      +
    179B  GLN*     1.3    61.1    +      -       -      +
    181B  LEU*     3.4     5.0    +      -       +      +
    182B  ALA*     2.9    24.6    +      -       -      +
    190B  VAL*     3.4    32.2    -      -       +      +
    191B  LEU      4.1     2.0    -      -       -      -
    192B  ASN*     3.4    22.9    -      -       -      +
    250B  GLY*     5.1     0.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 179 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    158A  LEU      4.9     2.8    +      -       -      +
    160A  PRO*     3.6    39.7    -      -       +      +
    175B  ASP*     2.9    34.3    +      -       -      +
    176B  MET*     3.2    19.1    +      -       -      +
    178B  PHE*     1.3    76.9    -      -       -      +
    180B  VAL*     1.3    60.4    -      -       -      +
    182B  ALA*     3.5     8.2    +      -       -      +
    183B  LEU*     3.4    19.6    +      -       -      +
    192B  ASN*     4.4     1.1    -      -       -      +
    250B  GLY*     3.6    23.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 180 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    160A  PRO*     3.9    18.4    -      -       +      -
    161A  PHE      3.3    25.1    -      -       -      +
    163A  GLY      4.1     0.4    -      -       -      +
    165A  ALA*     3.7    32.3    -      -       +      +
    168A  CYS*     4.0    18.2    -      -       +      -
    176B  MET      3.0    18.3    +      -       -      +
    177B  LEU      3.4     7.6    -      -       -      +
    179B  GLN*     1.3    73.9    -      -       -      +
    181B  LEU*     1.3    65.6    +      -       -      +
    183B  LEU*     3.1     8.3    +      -       -      +
    184B  GLU*     3.0    39.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 181 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108A  PHE*     3.5    49.1    -      -       +      -
    109A  VAL*     5.2     0.7    -      -       +      -
    132B  THR*     4.0     8.5    -      -       +      -
    136B  LEU*     3.9    13.0    -      -       +      -
    149B  VAL*     3.7    30.5    -      -       +      -
    177B  LEU      2.9    12.7    +      -       -      +
    178B  PHE*     3.7    12.3    -      -       +      +
    179B  GLN      3.4     0.2    -      -       -      -
    180B  VAL*     1.3    77.6    -      -       -      +
    182B  ALA*     1.3    57.3    +      -       -      +
    184B  GLU*     3.1     4.2    +      -       -      -
    185B  GLU*     2.8    56.4    +      -       +      +
    188B  VAL*     4.9     0.9    -      -       +      -
    190B  VAL*     4.0     9.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 182 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    178B  PHE      2.9    17.5    +      -       -      +
    179B  GLN      3.7     5.8    -      -       -      +
    180B  VAL      3.2     0.2    -      -       -      -
    181B  LEU*     1.3    76.1    -      -       -      +
    183B  LEU*     1.3    63.2    +      -       +      +
    185B  GLU      3.9    13.7    -      -       -      +
    186B  PRO*     4.0     6.9    -      -       -      +
    190B  VAL*     3.8    10.7    -      -       +      +
    249B  SER*     3.7    23.3    +      -       -      +
    250B  GLY*     3.6    26.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 183 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    160A  PRO*     3.5    43.7    -      -       +      +
    161A  PHE*     4.1     9.4    -      -       +      -
    162A  LYS*     3.4    44.0    +      -       +      +
    179B  GLN      3.4     8.2    +      -       -      +
    180B  VAL      3.1     9.9    +      -       -      +
    182B  ALA*     1.3    82.2    -      -       +      +
    184B  GLU*     1.3    61.6    +      -       -      +
    186B  PRO*     4.1    10.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 184 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    107A  GLY*     3.2    10.7    -      -       -      -
    108A  PHE*     3.0    36.1    +      -       +      +
    162A  LYS*     3.7    18.3    -      -       +      +
    163A  GLY*     2.8    39.8    +      -       -      +
    165A  ALA*     4.9     1.4    +      -       -      +
    211A  VAL*     5.6     1.0    -      -       -      +
    180B  VAL*     3.0    24.0    +      -       -      +
    181B  LEU*     3.1     6.5    +      -       -      +
    183B  LEU*     1.3    77.5    -      -       -      +
    185B  GLU*     1.3    77.4    +      -       +      +
    186B  PRO*     3.2     9.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 185 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108A  PHE*     5.7     0.7    -      -       +      -
    109A  VAL*     4.0    24.3    -      -       +      +
    136B  LEU*     5.3     0.2    -      -       +      -
    147B  ARG*     3.9    17.5    +      -       -      -
    181B  LEU*     2.8    32.6    +      -       +      +
    182B  ALA*     3.9     6.4    -      -       -      +
    184B  GLU*     1.3    92.7    -      -       +      +
    186B  PRO*     1.3    61.0    -      -       -      +
    187B  ASN*     3.1     5.0    -      -       -      +
    188B  VAL*     2.8    42.2    +      -       +      +
----------------------------------------------------------
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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