Contacts of the helix formed by residues 154 - 176 (chain D) in PDB entry 4GCK


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 ASP 154 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    153D  LEU*     1.3    75.1    -      -       -      +
    155D  GLU*     1.3    69.0    +      -       -      +
    156D  THR*     2.6    42.9    +      -       -      -
    157D  LEU*     3.0    25.2    +      -       +      +
    158D  LEU*     3.1    12.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 155 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    137D  ARG*     3.8    18.8    -      -       +      +
    140D  MET*     3.6    37.1    -      -       +      +
    141D  ARG*     3.8    32.4    +      -       +      +
    144D  LYS*     4.2    21.5    +      -       -      -
    151D  TYR*     4.7    14.5    +      -       +      +
    153D  LEU      3.5     8.1    +      -       -      +
    154D  ASP*     1.3    78.3    +      -       -      +
    156D  THR*     1.3    56.0    +      -       -      +
    158D  LEU*     4.4     3.1    -      -       -      +
    159D  ALA*     2.7    34.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 156 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133D  GLU*     4.4     4.0    -      -       -      +
    137D  ARG*     3.8    30.1    +      -       -      +
    141D  ARG*     4.8     5.0    +      -       -      -
    154D  ASP*     2.6    25.7    +      -       -      -
    155D  GLU*     1.3    73.1    -      -       -      +
    157D  LEU*     1.3    60.1    +      -       -      +
    159D  ALA*     4.3     0.5    -      -       -      +
    160D  SER*     3.1    24.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 157 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    185C  ASP*     4.2    12.1    -      -       +      +
    188C  ALA*     3.9    36.3    -      -       +      +
    189C  ARG*     3.6    41.9    +      -       +      +
    192C  LEU*     4.1    18.2    -      -       +      -
    153D  LEU*     4.3    23.1    -      -       +      -
    154D  ASP*     3.0    17.7    +      -       +      +
    156D  THR*     1.3    79.2    -      -       -      +
    158D  LEU*     1.3    54.9    -      -       -      +
    160D  SER*     3.0     7.9    +      -       -      -
    161D  GLN*     3.0    29.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 158 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    192C  LEU*     3.9    17.7    -      -       +      -
    140D  MET*     3.6    17.7    -      -       -      +
    151D  TYR*     3.6    46.0    -      -       +      -
    153D  LEU*     4.0    18.6    -      -       +      +
    154D  ASP      3.1    11.2    +      -       -      +
    155D  GLU*     3.9     4.0    -      -       -      +
    157D  LEU*     1.3    76.6    -      -       +      +
    159D  ALA*     1.3    61.3    +      -       -      +
    161D  GLN*     3.3     6.8    -      -       +      +
    162D  LEU*     3.0    25.8    +      -       -      +
    196D  GLN*     3.3    26.5    -      -       +      +
    197D  LEU*     4.2    11.4    -      -       +      +
    198D  GLN      3.7    10.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 159 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133D  GLU*     3.9    30.6    -      -       +      +
    136D  LEU*     3.9     9.2    -      -       +      +
    137D  ARG*     4.1    12.1    -      -       -      +
    140D  MET*     3.4    20.8    -      -       +      +
    155D  GLU      2.7    20.9    +      -       -      +
    156D  THR      4.3     0.7    -      -       -      +
    158D  LEU*     1.3    72.3    -      -       -      +
    160D  SER*     1.3    57.6    +      -       -      +
    162D  LEU*     3.2     4.8    +      -       -      +
    163D  LEU*     2.9    26.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 160 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    169C  MET*     6.4     0.4    -      -       -      -
    172C  ARG*     3.1    34.4    +      -       -      +
    189C  ARG*     2.9    39.0    +      -       -      -
    133D  GLU*     3.4    16.2    +      -       -      -
    156D  THR*     3.1    14.5    +      -       -      -
    157D  LEU      3.0     6.6    +      -       -      -
    159D  ALA*     1.3    73.6    -      -       -      +
    161D  GLN*     1.3    55.2    +      -       -      +
    163D  LEU      3.3     0.6    +      -       -      +
    164D  ALA*     2.8    34.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 161 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    165C  PHE*     3.5    15.4    -      -       -      -
    189C  ARG*     2.9    43.4    +      -       -      +
    192C  LEU*     4.3    15.6    -      -       +      +
    193C  VAL*     3.3    23.6    -      -       -      +
    157D  LEU*     3.0    12.8    +      -       -      +
    158D  LEU*     3.3    14.6    -      -       -      +
    160D  SER*     1.3    76.9    +      -       -      +
    162D  LEU*     1.3    65.1    +      -       +      +
    164D  ALA*     3.4     5.7    +      -       -      +
    165D  PHE*     3.2    21.0    +      -       -      +
    196D  GLN*     2.7    44.7    +      -       +      +
    197D  LEU*     6.2     0.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 162 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     88D  LEU*     4.3    23.1    -      -       +      -
     92D  VAL*     4.2    16.4    -      -       +      -
    136D  LEU*     4.1    13.9    -      -       +      -
    140D  MET*     3.4    30.1    -      -       +      -
    158D  LEU      3.0     7.8    +      -       -      +
    159D  ALA      3.2     8.3    +      -       -      +
    161D  GLN*     1.3    77.9    -      -       +      +
    163D  LEU*     1.3    66.1    +      -       -      +
    165D  PHE*     3.2     9.1    +      -       +      +
    166D  CYS*     3.1    24.5    +      -       -      -
    190D  TRP*     4.8     2.2    -      -       +      -
    193D  VAL*     3.5    29.6    -      -       +      +
    196D  GLN*     5.0     2.5    -      -       +      +
    197D  LEU*     3.9    27.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 163 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    172C  ARG*     4.1     6.1    -      -       -      +
    175C  ARG*     4.4     2.2    -      -       -      +
     95D  ILE*     5.1     4.3    -      -       +      -
    129D  PHE*     3.7    49.6    -      -       +      +
    132D  ILE*     4.4    15.5    -      -       +      -
    133D  GLU*     3.1    31.4    -      -       +      +
    136D  LEU*     4.5    10.0    -      -       +      +
    159D  ALA      2.9    13.7    +      -       -      +
    160D  SER      3.8     3.4    -      -       -      +
    162D  LEU*     1.3    76.7    -      -       -      +
    164D  ALA*     1.3    53.4    +      -       -      +
    166D  CYS*     3.0    15.9    +      -       +      +
    167D  GLU*     2.8    52.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 164 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    164C  ALA      3.9     2.1    -      -       -      +
    165C  PHE*     4.5    10.8    -      -       +      -
    168C  GLY*     3.2    22.3    -      -       -      -
    169C  MET*     3.9    30.1    -      -       +      +
    172C  ARG*     4.5     5.6    -      -       -      +
    160D  SER      2.8    22.0    +      -       -      +
    161D  GLN*     3.6     8.5    -      -       -      +
    162D  LEU      3.2     0.2    -      -       -      -
    163D  LEU*     1.3    72.0    -      -       -      +
    165D  PHE*     1.3    57.5    +      -       -      +
    167D  GLU*     4.5     2.0    -      -       -      +
    168D  GLY*     2.9    25.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 165 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    161C  GLN*     3.8    29.6    -      -       -      -
    164C  ALA*     4.6    14.3    -      -       +      +
    165C  PHE*     5.3     3.3    -      -       -      +
     92D  VAL*     3.8    30.7    -      -       +      -
     96D  LEU*     3.9    14.6    -      -       +      -
    161D  GLN      3.2     9.8    +      -       -      +
    162D  LEU*     3.2    11.5    +      -       -      +
    164D  ALA*     1.3    80.2    -      -       -      +
    166D  CYS*     1.3    59.6    +      -       -      +
    168D  GLY*     3.4     0.9    +      -       -      -
    169D  MET*     3.0    59.9    +      -       +      +
    186D  PHE*     4.9     6.1    -      +       -      -
    189D  ARG*     4.2    17.3    -      -       +      -
    190D  TRP*     5.5     0.2    -      +       -      -
    193D  VAL*     3.9    32.5    -      -       +      -
    196D  GLN*     5.5     2.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with CYS 166 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     92D  VAL*     3.9    42.6    -      -       -      -
     95D  ILE*     4.2    31.2    -      -       +      -
     96D  LEU*     4.3     9.4    -      -       +      -
    129D  PHE*     6.1     1.1    -      -       +      -
    136D  LEU*     6.2     0.9    -      -       -      -
    162D  LEU      3.1    16.9    +      -       -      -
    163D  LEU*     3.0    18.2    +      -       +      +
    165D  PHE*     1.3    75.1    -      -       -      +
    167D  GLU*     1.3    65.4    +      -       +      +
    169D  MET*     3.2     3.8    +      -       -      +
    170D  LEU*     3.0    29.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 167 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    168C  GLY*     4.2    11.0    -      -       -      +
    171C  SER*     4.3    12.0    +      -       -      -
    172C  ARG*     3.1    21.7    -      -       -      +
    175C  ARG*     2.7    53.1    +      -       -      +
    110D  THR*     5.3     0.5    -      -       -      +
    129D  PHE*     4.0    25.9    -      -       +      -
    163D  LEU*     2.8    33.2    +      -       +      +
    164D  ALA      4.0     2.5    -      -       -      +
    166D  CYS*     1.3    71.4    -      -       -      +
    168D  GLY*     1.3    57.1    +      -       -      +
    170D  LEU*     3.3     8.3    +      -       -      +
    171D  SER*     2.8    32.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 168 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    164C  ALA*     3.2    27.1    -      -       -      -
    167C  GLU*     4.1     5.6    -      -       -      +
    168C  GLY*     3.5    11.4    -      -       -      -
    164D  ALA      2.9    12.3    +      -       -      -
    165D  PHE      3.8     0.9    -      -       -      -
    167D  GLU*     1.3    76.8    -      -       -      +
    169D  MET*     1.3    61.2    +      -       -      +
    171D  SER*     3.5     1.8    +      -       -      -
    172D  ARG*     3.1    33.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 169 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    160C  SER*     5.4     0.4    -      -       -      +
    164C  ALA*     4.0    15.7    -      -       +      -
     96D  LEU*     3.8    16.4    -      -       +      -
    165D  PHE*     3.0    51.5    +      -       +      +
    166D  CYS      3.2     4.9    +      -       -      +
    168D  GLY*     1.3    76.7    -      -       -      +
    170D  LEU*     1.3    57.8    +      -       -      +
    172D  ARG*     3.5    13.3    +      -       -      +
    173D  PHE*     3.1    25.8    +      -       -      +
    180D  TYR      4.6     1.9    -      -       -      +
    181D  ARG      4.6     4.3    -      -       -      +
    182D  PRO*     3.2    36.1    -      -       +      +
    184D  ASP      4.7     1.3    -      -       -      +
    189D  ARG*     3.7    35.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 170 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     95D  ILE*     4.2    21.1    -      -       +      +
     96D  LEU*     4.2    11.0    -      -       +      -
     99D  GLY*     4.3    13.9    -      -       -      -
    106D  THR*     4.1    15.2    -      -       +      +
    109D  LEU*     4.1    27.4    -      -       +      -
    110D  THR*     3.9    15.3    -      -       +      -
    129D  PHE*     5.3     9.9    -      -       +      -
    166D  CYS*     3.0    23.9    +      -       +      +
    167D  GLU*     3.8     6.5    -      -       -      +
    169D  MET*     1.3    73.8    -      -       -      +
    171D  SER*     1.3    65.7    +      -       -      +
    173D  PHE*     3.1     7.0    +      -       -      +
    174D  VAL*     3.0    25.3    +      -       -      +
    182D  PRO*     3.9    22.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 171 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    110C  THR*     4.8    11.1    +      -       -      +
    167C  GLU*     3.4    18.1    +      -       -      +
    171C  SER*     3.7    20.7    +      -       -      -
    110D  THR*     4.0    12.9    -      -       -      +
    112D  HIS*     5.2     6.5    -      -       -      -
    167D  GLU      2.8    18.4    +      -       -      -
    168D  GLY*     3.6     7.4    -      -       -      -
    170D  LEU*     1.3    76.5    -      -       -      +
    172D  ARG*     1.3    56.8    +      -       -      +
    174D  VAL*     3.2     5.9    +      -       -      +
    175D  ARG*     2.9    33.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 172 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133C  GLU*     2.9    29.9    +      -       -      -
    160C  SER*     3.5    22.0    +      -       -      -
    163C  LEU*     3.1    29.5    -      -       -      +
    164C  ALA*     4.1    18.2    -      -       -      +
    167C  GLU*     3.0    41.0    +      -       -      +
    168D  GLY      3.1    22.5    +      -       -      +
    169D  MET*     3.7    14.3    -      -       -      +
    171D  SER*     1.3    73.3    -      -       -      +
    173D  PHE*     1.3    66.9    +      -       -      +
    175D  ARG*     3.4    19.5    -      -       -      +
    176D  SER*     2.8    29.2    +      -       -      -
    180D  TYR*     4.2    30.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 173 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99D  GLY      3.4    22.9    -      -       -      -
    100D  GLU*     3.8    24.5    -      -       +      -
    103D  PRO*     4.1    12.3    -      -       +      -
    106D  THR*     4.0    18.2    -      -       +      -
    169D  MET      3.1    13.6    +      -       -      +
    170D  LEU      3.1     8.3    +      -       -      +
    172D  ARG*     1.3    73.8    -      -       -      +
    174D  VAL*     1.3    56.7    +      -       -      +
    176D  SER*     3.1     7.5    +      -       -      -
    178D  PHE*     2.8    84.7    +      +       +      -
    180D  TYR      3.2    25.9    +      -       -      +
    181D  ARG*     4.0     9.2    -      -       +      -
    182D  PRO*     3.5    23.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 174 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    106D  THR*     3.8    15.5    -      -       +      +
    107D  ARG*     4.4    24.2    +      -       +      +
    110D  THR*     3.6    25.1    -      -       +      +
    112D  HIS*     3.9    30.7    -      -       +      +
    170D  LEU      3.0    13.4    +      -       -      +
    171D  SER      3.5     7.2    -      -       -      +
    172D  ARG      3.2     0.2    -      -       -      -
    173D  PHE*     1.3    74.2    -      -       -      +
    175D  ARG*     1.3    66.8    +      -       -      +
    177D  GLU*     3.0    14.9    +      -       -      -
    178D  PHE*     4.2    16.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 175 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    109C  LEU      5.3     2.0    -      -       -      -
    110C  THR      5.5     6.5    -      -       -      +
    122C  GLN*     4.3    20.6    -      -       -      +
    126C  ASN*     2.9    58.4    +      -       -      +
    129C  PHE*     3.6    43.9    -      -       -      +
    130C  GLU*     4.8     7.7    +      -       -      -
    133C  GLU*     4.8     1.4    +      -       -      -
    163C  LEU*     4.3     1.0    -      -       -      +
    167C  GLU*     2.6    43.1    +      -       -      +
    112D  HIS*     6.0     1.8    +      -       -      +
    171D  SER*     2.9    33.1    +      -       -      +
    172D  ARG*     3.4    27.6    -      -       -      +
    174D  VAL*     1.3    75.1    -      -       -      +
    176D  SER*     1.3    58.7    +      -       -      +
    177D  GLU*     3.2     9.2    +      -       -      +
    180D  TYR*     4.9    10.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with SER 176 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    126C  ASN*     4.6     4.7    -      -       -      +
    172D  ARG      2.8    19.3    +      -       -      -
    173D  PHE      3.1     5.5    +      -       -      -
    175D  ARG*     1.3    78.0    -      -       -      +
    177D  GLU*     1.3    73.2    +      -       -      +
    179D  LYS*     3.1    28.7    +      -       -      +
    180D  TYR*     3.0    49.1    +      -       -      +
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


   I  Hydrophilic      - N and O that can donate and accept hydrogen bonds
                         (e.g., oxygen of hydroxyl group of Ser. or Thr)
  II  Acceptor         - N or O that can only accept a hydrogen bond
 III  Donor            - N that can only donate a hydrogen bond
  IV  Hydrophobic      - Cl, Br, I and all C atoms that are not in
                         aromatic rings and do not have a covalent bond to
                         a N or O atom
   V  Aromatic         - C in aromatic rings irrespective of any other 
                         bonds formed by the atom
  VI  Neutral          - C atoms that have a covalent bond to at least one
                         atom of class I or two or more atoms from class II
                         or III; atoms; S, F, P, and metal atoms in all cases
 VII  Neutral-donor    - C atoms that have a covalent bond with only one
                         atom of class III
VIII  Neutral-acceptor - C atoms that have a covalent bond with only 
                         one atom of class II
For each pair of contacts the state of legitimacy is shown below:

Legend:
+, legitimate
-, illegitimate
------------------------------------------------------------
  Atomic class           I  II  III   IV   V   VI  VII  VIII
------------------------------------------------------------
   I  (Hydrophilic)      +   +    +    -   +   +    +    +
  II  (Acceptor)         +   -    +    -   +   +    +    -
 III  (Donor)            +   +    -    -   +   +    -    +
  IV  (Hydrophobic)      -   -    -    +   +   +    +    +
   V  (Aromatic)         +   +    +    +   +   +    +    +
  VI  (Neutral)          +   +    +    +   +   +    +    +
 VII  (Neutral-donor)    +   +    -    +   +   +    -    +
VIII  (Neutral-acceptor) +   -    +    +   +   +    +    -
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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