Contacts of the helix formed by residues 133 - 159 (chain D) in PDB entry 3V5I


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 ALA 133 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    131D  GLY      3.9     1.2    +      -       -      -
    132D  GLN*     1.3    71.6    -      -       -      +
    134D  THR*     1.3    57.3    +      -       -      +
    136D  ILE*     3.3    11.7    +      -       -      +
    137D  GLU*     2.9    29.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 134 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132D  GLN*     3.3     4.0    -      -       -      +
    133D  ALA*     1.3    77.2    -      -       -      +
    135D  GLU*     1.3    63.0    +      -       -      +
    137D  GLU*     3.4    15.7    +      -       -      +
    138D  ILE*     3.1    30.5    +      -       +      +
    171E  ARG*     3.5    44.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 135 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    129D  ALA*     5.5     0.7    -      -       -      -
    130D  GLN      4.0    10.4    -      -       -      +
    131D  GLY*     3.6     7.4    -      -       -      -
    132D  GLN*     2.9    34.7    +      -       +      +
    134D  THR*     1.3    75.3    -      -       -      +
    136D  ILE*     1.3    63.6    +      -       -      +
    138D  ILE*     3.2    10.9    +      -       +      +
    139D  ALA*     3.1    21.0    +      -       -      +
    171E  ARG*     3.5    32.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 136 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    129D  ALA*     4.1    31.6    -      -       +      +
    130D  GLN      4.5     0.2    -      -       -      -
    131D  GLY      3.5    33.4    -      -       -      +
    132D  GLN      2.9    13.0    +      -       -      +
    133D  ALA*     3.7    10.3    -      -       -      +
    135D  GLU*     1.3    71.6    -      -       -      +
    137D  GLU*     1.3    61.0    +      -       -      +
    139D  ALA*     3.1     2.4    +      -       -      +
    140D  ALA*     2.8    33.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 137 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133D  ALA      2.9    17.0    +      -       -      +
    134D  THR*     3.5    15.1    +      -       -      +
    136D  ILE*     1.3    78.1    -      -       -      +
    138D  ILE*     1.3    65.3    +      -       +      +
    140D  ALA*     3.3     6.2    +      -       +      +
    141D  ASN*     3.0    44.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 138 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    134D  THR*     3.1    26.4    +      -       +      +
    135D  GLU*     3.2     8.7    +      -       +      +
    137D  GLU*     1.3    76.9    -      -       +      +
    139D  ALA*     1.3    64.2    +      -       -      +
    141D  ASN*     3.4     8.8    +      -       -      +
    142D  HIS*     3.0    21.3    +      -       -      +
    171E  ARG*     3.5    37.5    -      -       +      -
    172E  ASP*     3.6    33.7    -      -       +      +
    174E  PHE*     4.3    13.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 139 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128D  GLY      4.3     7.2    -      -       -      +
    129D  ALA*     3.5    31.2    -      -       +      -
    135D  GLU      3.1    11.4    +      -       -      +
    136D  ILE      3.1     2.4    +      -       -      +
    138D  ILE*     1.3    77.6    -      -       -      +
    140D  ALA*     1.3    63.9    +      -       -      +
    142D  HIS*     3.2     7.4    +      -       -      +
    143D  ILE*     3.0    25.6    +      -       -      +
    174E  PHE*     5.4     2.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 140 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    129D  ALA*     5.4     0.4    -      -       -      +
    136D  ILE*     2.8    22.3    +      -       +      +
    137D  GLU*     3.7     7.6    -      -       +      +
    139D  ALA*     1.3    77.1    -      -       -      +
    141D  ASN*     1.3    61.7    +      -       -      +
    143D  ILE*     3.4     9.1    -      -       -      +
    144D  LEU*     3.0    41.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 141 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    137D  GLU*     3.0    39.4    +      -       -      +
    138D  ILE*     3.7     8.8    -      -       -      +
    140D  ALA*     1.3    80.2    -      -       -      +
    142D  HIS*     1.3    61.6    +      -       -      +
    144D  LEU*     3.4    13.2    +      -       -      +
    145D  LYS*     2.9    25.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 142 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    138D  ILE      3.0    16.6    +      -       -      +
    139D  ALA*     3.2     6.4    +      -       -      +
    141D  ASN*     1.3    78.0    -      -       -      +
    143D  ILE*     1.3    59.7    +      -       -      +
    145D  LYS*     3.3     8.6    +      -       +      +
    146D  THR*     3.0    42.0    +      -       -      -
     95E  MET*     4.5     4.3    -      -       +      -
    119E  GLU*     2.9    33.7    +      -       -      -
    174E  PHE*     3.3    60.7    -      +       +      -
----------------------------------------------------------
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Residues in contact with ILE 143 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    125D  PRO*     4.0    24.2    -      -       +      +
    126D  LEU      3.7    10.3    -      -       -      +
    127D  GLY*     3.7    33.2    -      -       -      +
    139D  ALA      3.0    16.1    +      -       -      +
    140D  ALA*     3.4    15.9    -      -       -      +
    142D  HIS*     1.3    80.1    -      -       -      +
    144D  LEU*     1.3    69.7    +      -       +      +
    146D  THR*     3.2     8.5    +      -       +      -
    147D  ARG*     3.0    22.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 144 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    140D  ALA*     3.0    29.9    +      -       +      +
    141D  ASN*     3.8    11.9    -      -       -      +
    143D  ILE*     1.3    80.3    -      -       +      +
    145D  LYS*     1.3    63.1    +      -       -      +
    147D  ARG*     3.1    16.1    +      -       +      +
    148D  GLU*     3.1    29.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 145 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    141D  ASN      2.9    18.1    +      -       -      +
    142D  HIS*     3.6    10.1    -      -       +      +
    144D  LEU*     1.3    76.3    -      -       -      +
    146D  THR*     1.3    58.6    +      -       -      +
    148D  GLU*     3.3    17.4    +      -       -      +
    149D  LYS*     3.0    26.5    +      -       -      +
    174E  PHE      5.8     0.8    +      -       -      -
    176E  THR*     3.7    28.5    -      -       +      +
    179E  GLU*     3.9    16.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with THR 146 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     71D  VAL*     3.7    33.7    -      -       +      -
     75D  PHE*     5.2     3.4    -      -       +      -
    125D  PRO*     4.9     4.7    -      -       +      -
    142D  HIS*     3.0    28.2    +      -       -      -
    143D  ILE*     3.2    14.3    +      -       +      -
    145D  LYS*     1.3    73.2    -      -       -      +
    147D  ARG*     1.3    59.1    +      -       -      +
    149D  LYS*     3.2     8.1    +      -       +      +
    150D  LEU*     2.9    35.8    +      -       +      +
    119E  GLU*     3.5    21.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 147 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    124D  GLN*     3.5    36.6    +      -       -      +
    125D  PRO*     3.8    23.5    -      -       +      +
    143D  ILE      3.0    12.6    +      -       -      +
    144D  LEU*     3.1    19.1    +      -       +      +
    146D  THR*     1.3    77.4    -      -       -      +
    148D  GLU*     1.3    57.3    +      -       -      +
    150D  LEU*     3.3     3.2    +      -       +      +
    151D  ASN*     2.8    46.9    +      -       -      +
    166D  GLN*     2.9    62.0    +      -       -      +
    169D  THR*     3.0    28.9    +      -       -      -
    170D  ASP*     3.6     9.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 148 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    144D  LEU*     3.1    18.0    +      -       -      +
    145D  LYS*     3.3    20.3    +      -       -      +
    147D  ARG*     1.3    75.6    -      -       -      +
    149D  LYS*     1.3    58.5    +      -       -      +
    151D  ASN*     3.9     5.5    -      -       -      +
    152D  ARG*     2.8    36.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 149 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     75D  PHE*     3.6    35.1    -      -       +      -
    145D  LYS      3.0    13.4    +      -       -      +
    146D  THR*     3.2    11.4    +      -       -      +
    148D  GLU*     1.3    76.1    -      -       -      +
    150D  LEU*     1.3    63.6    +      -       -      +
    152D  ARG*     3.6    23.9    -      -       -      +
    153D  ILE*     3.1    26.1    +      -       +      +
    117E  ASN*     2.8    49.5    +      -       -      +
    118E  ALA      4.7     0.6    +      -       -      -
    119E  GLU*     3.3    32.6    +      -       -      +
    176E  THR*     6.1     3.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 150 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     71D  VAL*     4.3     4.7    -      -       +      -
     75D  PHE*     3.7    23.6    -      -       +      -
     99D  MET*     3.6    33.7    -      -       +      -
    102D  PHE*     3.6    31.5    -      -       +      -
    125D  PRO*     4.0    28.3    -      -       +      -
    146D  THR*     2.9    27.9    +      -       +      +
    147D  ARG*     3.7     4.5    -      -       +      +
    149D  LYS*     1.3    77.8    -      -       -      +
    151D  ASN*     1.3    60.6    +      -       -      +
    153D  ILE      3.3     0.3    +      -       -      -
    154D  LEU*     2.9    33.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 151 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    147D  ARG*     2.8    33.0    +      -       -      +
    148D  GLU*     3.9     5.5    -      -       -      +
    150D  LEU*     1.3    77.3    -      -       -      +
    152D  ARG*     1.3    57.4    +      -       -      +
    154D  LEU*     3.3     3.8    +      -       -      +
    155D  SER*     2.8    31.6    +      -       -      -
    162D  ILE*     4.3    15.1    +      -       +      +
    165D  ILE*     3.4    30.3    -      -       +      +
    166D  GLN*     2.9    43.0    +      -       -      +
    169D  THR*     4.3     6.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 152 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    148D  GLU*     2.8    25.0    +      -       -      +
    149D  LYS*     3.6    36.7    -      -       -      +
    151D  ASN*     1.3    72.6    -      -       -      +
    153D  ILE*     1.3    71.1    +      -       -      +
    155D  SER*     3.2     6.4    +      -       -      -
    156D  GLU*     3.2    39.3    +      -       +      +
    162D  ILE*     4.3    21.7    -      -       +      +
    117E  ASN*     3.9    22.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 153 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     75D  PHE*     3.8    19.3    -      -       +      -
     78D  TYR*     3.1    34.3    -      -       +      +
    102D  PHE*     3.8    13.9    -      -       +      -
    149D  LYS*     3.1    17.4    +      -       +      +
    150D  LEU      4.0     2.2    -      -       -      +
    152D  ARG*     1.3    87.1    -      -       -      +
    154D  LEU*     1.3    62.3    +      -       -      +
    156D  GLU*     3.3    19.0    +      -       -      +
    157D  ARG*     3.2    26.3    +      -       -      +
    117E  ASN*     3.5    38.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 154 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    102D  PHE*     4.0    27.9    -      -       +      +
    105D  ALA*     4.3    15.0    -      -       +      -
    122D  ILE*     5.1    14.1    -      -       +      -
    150D  LEU*     2.9    18.4    +      -       +      +
    151D  ASN*     3.6     7.4    -      -       -      +
    153D  ILE*     1.3    75.5    -      -       -      +
    155D  SER*     1.3    62.7    -      -       -      +
    157D  ARG*     3.1     4.0    +      -       +      +
    158D  THR*     2.8    36.7    +      -       +      +
    165D  ILE*     4.0    28.3    -      -       +      -
    169D  THR*     5.3     5.8    -      -       +      -
    183D  TYR*     5.9     0.9    -      -       +      -
    185D  LEU*     4.2    23.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 155 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    151D  ASN      2.8    13.6    +      -       -      -
    152D  ARG      3.2    10.8    -      -       -      -
    154D  LEU*     1.3    76.2    -      -       -      +
    156D  GLU*     1.3    57.8    +      -       -      +
    158D  THR*     3.9     1.8    -      -       -      -
    159D  GLY*     2.9    31.7    +      -       -      -
    160D  GLN      2.7    25.1    +      -       -      +
    161D  SER*     3.9     1.4    -      -       -      -
    162D  ILE*     3.6    28.4    +      -       -      +
    165D  ILE*     4.5     3.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 156 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     78D  TYR*     5.2     1.6    +      -       -      -
    109D  LYS*     3.7    11.0    +      -       -      -
    152D  ARG*     3.2    34.6    +      -       +      +
    153D  ILE*     3.5    25.1    -      -       -      +
    154D  LEU      3.2     0.4    -      -       -      -
    155D  SER*     1.3    79.2    -      -       -      +
    157D  ARG*     1.3    63.6    +      -       +      +
    159D  GLY*     4.4     2.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 157 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     78D  TYR*     3.3    29.6    +      -       -      -
     82D  GLN*     3.6    31.8    -      -       -      +
    102D  PHE      5.8     0.2    -      -       -      -
    105D  ALA*     3.6    36.3    +      -       +      +
    106D  ALA*     4.1     9.3    +      -       -      +
    107D  GLY      3.7    14.8    +      -       -      -
    108D  ALA*     5.7     0.6    -      -       -      +
    109D  LYS*     3.7    36.8    +      -       -      +
    112D  ARG*     3.1    25.0    +      -       -      +
    153D  ILE*     3.2    18.6    -      -       +      +
    154D  LEU*     3.1     7.5    +      -       +      +
    156D  GLU*     1.3    82.5    -      -       +      +
    158D  THR*     1.3    61.5    +      -       -      +
    184D  GLY      3.3     2.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 158 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    105D  ALA*     5.0     0.9    -      -       +      -
    154D  LEU*     2.8    31.0    +      -       +      +
    155D  SER*     3.6     1.4    +      -       -      -
    157D  ARG*     1.3    79.5    -      -       +      +
    159D  GLY*     1.3    61.6    +      -       -      +
    160D  GLN*     3.2    22.0    +      -       -      +
    165D  ILE*     4.1     2.6    -      -       -      +
    183D  TYR*     3.6    27.0    -      -       +      +
    184D  GLY*     3.3    26.7    -      -       -      +
    185D  LEU*     3.8    29.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 159 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    155D  SER      2.9    11.7    +      -       -      -
    156D  GLU      4.3     2.8    +      -       -      -
    157D  ARG      3.6     1.8    -      -       -      +
    158D  THR*     1.3    77.4    -      -       -      +
    160D  GLN*     1.3    64.5    +      -       -      +
    161D  SER      4.0     0.5    +      -       -      -
----------------------------------------------------------
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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