Contacts of the helix formed by residues 197 - 219 (chain C) in PDB entry 2OT0


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 197 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    195C  ASP      3.8     0.8    +      -       -      -
    196C  HIS*     1.3    81.7    -      -       -      +
    198C  LEU*     1.3    66.6    +      -       -      +
    199C  LYS*     3.7    17.7    -      -       -      +
    200C  ARG*     2.9    25.6    +      -       -      +
    201C  CYS*     3.2    15.9    +      -       -      +
    235C  PRO*     3.8     4.5    -      -       -      -
    239C  CYS*     3.8    14.8    -      -       -      -
    241C  GLN*     5.0     4.2    +      -       -      +
    243C  TYR*     3.4    16.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 198 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    197C  ASP*     1.3    76.0    -      -       -      +
    199C  LYS*     1.3    61.4    +      -       +      +
    201C  CYS*     3.2     3.6    +      -       -      +
    202C  GLN*     2.9    28.4    +      -       -      +
    233C  VAL*     3.4    31.9    -      -       +      +
    234C  THR*     3.6    15.5    -      -       -      -
    235C  PRO*     3.9    10.7    -      -       +      +
    243C  TYR*     3.5    40.8    +      -       +      -
    247C  GLU*     3.8    27.4    -      -       +      +
    248C  ILE*     4.6     7.2    -      -       +      -
    251C  ALA*     3.8    13.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 199 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      3B  SER*     5.5     2.6    -      -       -      -
    197C  ASP*     3.3    16.0    +      -       -      +
    198C  LEU*     1.3    79.5    -      -       +      +
    200C  ARG*     1.3    57.1    +      -       -      +
    202C  GLN*     3.3     8.0    +      -       -      +
    203C  TYR*     2.9    29.9    +      -       -      +
    243C  TYR*     5.8     1.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 200 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      1B  PRO*     2.7    30.3    +      -       -      +
      2B  HIS*     3.4    36.5    +      -       -      +
      3B  SER*     4.8     8.5    -      -       -      +
    153C  ILE*     3.6    19.8    -      -       +      +
    154C  GLY*     2.8    28.9    +      -       -      -
    157C  THR      3.6    10.9    +      -       -      -
    196C  HIS*     3.7    23.6    -      -       +      +
    197C  ASP*     2.9    21.6    +      -       -      +
    199C  LYS*     1.3    77.0    -      -       -      +
    201C  CYS*     1.3    63.8    +      -       -      +
    203C  TYR*     3.2     6.8    +      -       -      +
    204C  VAL*     3.0    32.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with CYS 201 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    153C  ILE*     4.0    18.2    -      -       +      -
    190C  ILE*     5.3     2.7    -      -       -      -
    191C  LEU      6.1     0.7    -      -       -      -
    192C  PRO*     6.6     0.2    -      -       -      -
    196C  HIS*     4.2     9.1    -      -       +      -
    197C  ASP      3.2     6.4    +      -       -      +
    198C  LEU      3.2     7.0    +      -       -      +
    200C  ARG*     1.3    79.1    -      -       -      +
    202C  GLN*     1.3    55.6    +      -       -      +
    204C  VAL*     3.9     0.7    -      -       -      +
    205C  THR*     2.7    48.6    +      -       -      -
    231C  ASN*     4.0    11.2    -      -       -      -
    232C  MET      4.2     0.4    -      -       -      -
    233C  VAL*     3.8     9.2    -      -       +      -
    234C  THR*     3.1    42.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 202 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    198C  LEU*     2.9    17.0    +      -       -      +
    199C  LYS*     3.6     8.9    -      -       -      +
    200C  ARG      3.2     0.2    -      -       -      -
    201C  CYS*     1.3    77.4    -      -       -      +
    203C  TYR*     1.3    63.1    +      -       -      +
    205C  THR*     3.4     3.1    +      -       -      -
    206C  GLU*     2.7    51.5    +      -       -      +
    233C  VAL*     3.4    12.7    -      -       +      +
    251C  ALA*     3.4    41.3    -      -       +      +
    254C  THR*     3.5    23.3    -      -       -      +
    255C  ALA*     4.0     5.4    -      -       +      -
    258C  ARG*     3.5     7.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 203 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    117A  GLY      5.1     1.7    +      -       -      -
      1B  PRO*     4.1    20.9    -      -       +      -
      2B  HIS      3.7    20.7    +      -       -      -
      3B  SER*     3.4    43.0    -      -       -      +
      4B  HIS      4.8     2.8    +      -       -      -
    220B  HIS*     3.4    28.3    +      +       -      -
    199C  LYS      2.9    17.4    +      -       -      +
    200C  ARG*     3.5     7.0    -      -       -      +
    202C  GLN*     1.3    76.8    -      -       -      +
    204C  VAL*     1.3    65.9    +      -       +      +
    206C  GLU*     3.2    12.2    +      -       -      +
    207C  LYS*     3.1    57.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 204 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      1B  PRO*     3.8    23.8    -      -       +      +
    153C  ILE*     4.0    23.1    -      -       +      -
    158C  PRO*     3.7    33.4    -      -       +      -
    163C  ILE*     6.1     1.1    -      -       +      -
    190C  ILE*     3.7    16.8    -      -       +      -
    200C  ARG*     3.0    28.6    +      -       -      +
    201C  CYS      4.0     2.9    -      -       -      +
    203C  TYR*     1.3    78.4    -      -       +      +
    205C  THR*     1.3    63.8    +      -       -      +
    207C  LYS*     3.2     5.7    +      -       -      +
    208C  VAL*     2.9    26.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 205 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    190C  ILE*     3.4    15.8    -      -       +      +
    201C  CYS*     2.7    29.6    +      -       -      -
    202C  GLN      3.7     3.8    -      -       -      -
    204C  VAL*     1.3    76.2    -      -       -      +
    206C  GLU*     1.3    57.3    +      -       -      +
    208C  VAL*     3.5     0.5    +      -       -      +
    209C  LEU*     3.0    51.8    +      -       +      +
    230C  PRO*     5.7     2.0    -      -       +      -
    231C  ASN*     3.5    30.0    +      -       -      +
    233C  VAL*     4.0    19.1    -      -       +      +
    255C  ALA*     4.2     7.9    -      -       +      -
    256C  LEU*     5.8     1.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 206 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    217B  SER*     4.6     0.9    +      -       -      -
    202C  GLN*     2.7    51.5    +      -       -      +
    203C  TYR*     3.5     9.6    -      -       -      +
    204C  VAL      3.2     0.2    -      -       -      -
    205C  THR*     1.3    77.3    -      -       -      +
    207C  LYS*     1.3    69.0    +      -       +      +
    210C  ALA*     3.1    21.3    +      -       -      +
    255C  ALA*     3.8    23.3    -      -       -      +
    258C  ARG*     3.1    32.2    +      -       -      +
    259C  THR*     3.3    21.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 207 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      1B  PRO*     6.4     0.4    -      -       +      -
    214B  LYS*     5.7     0.3    -      -       -      -
    217B  SER*     2.7    39.7    +      -       -      +
    218B  ASP*     5.0     1.3    -      -       -      +
    220B  HIS*     3.1    24.1    -      -       -      +
    163C  ILE*     4.5    15.7    -      -       +      +
    203C  TYR*     3.1    55.6    +      -       +      +
    204C  VAL*     3.2     7.2    +      -       -      +
    206C  GLU*     1.3    79.1    -      -       +      +
    208C  VAL*     1.3    66.3    +      -       -      +
    210C  ALA*     3.5     5.4    +      -       -      +
    211C  ALA*     3.2    22.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 208 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    151C  LEU*     4.1    31.2    -      -       +      -
    158C  PRO*     4.7     0.4    -      -       +      -
    163C  ILE*     4.4    16.8    -      -       +      +
    188C  PRO*     4.2    26.9    -      -       +      +
    190C  ILE*     3.7    22.4    -      -       +      -
    204C  VAL*     2.9    30.2    +      -       +      +
    205C  THR      3.8     3.1    -      -       -      +
    207C  LYS*     1.3    76.6    -      -       -      +
    209C  LEU*     1.3    59.9    +      -       +      +
    211C  ALA*     3.2     7.9    +      -       -      +
    212C  VAL*     2.9    33.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 209 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    188C  PRO*     3.9    28.9    -      -       +      +
    190C  ILE*     6.2     0.2    -      -       +      -
    205C  THR*     3.0    39.6    +      -       +      +
    208C  VAL*     1.3    75.1    -      -       +      +
    210C  ALA*     1.3    64.6    +      -       -      +
    212C  VAL*     4.2     4.3    -      -       +      -
    213C  TYR*     3.0    36.4    +      -       +      -
    228C  LEU*     4.1    19.3    -      -       +      -
    230C  PRO*     4.6     7.6    -      -       +      -
    255C  ALA      4.8     1.8    -      -       -      +
    256C  LEU*     3.9    23.8    -      -       +      -
    259C  THR*     3.4    29.6    -      -       -      +
    260C  VAL*     4.3     4.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 210 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    213B  TYR      5.6     0.4    -      -       -      +
    214B  LYS*     3.8    13.5    -      -       +      +
    217B  SER*     3.3    30.7    -      -       -      +
    206C  GLU      3.1    19.7    +      -       -      +
    207C  LYS      3.7     4.3    -      -       -      +
    208C  VAL      3.2     0.2    -      -       -      -
    209C  LEU*     1.3    78.5    -      -       -      +
    211C  ALA*     1.3    62.9    +      -       -      +
    213C  TYR*     4.0     3.2    -      -       -      +
    214C  LYS*     3.1    23.2    +      -       -      +
    259C  THR*     4.2    12.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 211 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    214B  LYS*     3.8    19.0    -      -       -      +
    163C  ILE*     3.4    32.5    -      -       +      +
    164C  MET*     5.4     1.6    -      -       -      +
    167C  ALA*     3.7    11.3    -      -       +      +
    207C  LYS      3.2     6.5    +      -       -      +
    208C  VAL      3.2     7.1    +      -       -      +
    210C  ALA*     1.3    77.7    -      -       -      +
    212C  VAL*     1.3    66.3    +      -       -      +
    214C  LYS*     3.3     1.9    +      -       -      +
    215C  ALA*     3.0    24.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 212 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    167C  ALA*     3.9    17.7    -      -       +      +
    170C  LEU*     4.4     9.0    -      -       +      -
    186C  VAL*     3.9    27.4    -      -       +      -
    188C  PRO*     3.9    29.2    -      -       +      -
    208C  VAL*     2.9    26.8    +      -       +      +
    209C  LEU*     3.3     8.7    +      -       +      +
    211C  ALA*     1.3    76.5    -      -       -      +
    213C  TYR*     1.4    66.7    +      -       +      +
    215C  ALA*     3.2     4.4    +      -       -      +
    216C  LEU*     2.9    44.1    +      -       +      +
    228C  LEU*     5.1     1.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 213 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    210B  ALA*     5.6     0.3    -      -       -      +
    186C  VAL*     5.7     1.0    -      -       -      +
    209C  LEU*     3.0    32.6    +      -       +      +
    210C  ALA*     4.4     2.9    -      -       -      +
    212C  VAL*     1.4    80.3    -      -       +      +
    214C  LYS*     1.3    63.5    +      -       -      +
    216C  LEU*     3.5    27.9    -      -       +      +
    217C  SER*     3.2    21.7    +      -       -      -
    223C  LEU*     4.1    13.9    -      -       +      +
    226C  THR*     5.4     1.8    +      -       -      -
    227C  LEU      5.4     0.7    -      -       -      -
    228C  LEU*     3.4    38.8    -      -       +      +
    259C  THR      3.8    14.8    -      -       -      +
    260C  VAL*     3.8    20.4    -      -       +      +
    261C  PRO*     3.8    22.4    -      -       +      -
    264C  VAL*     3.5    32.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 214 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    207B  LYS      5.6     0.2    -      -       -      -
    210B  ALA*     3.9    24.0    -      -       +      +
    211B  ALA*     3.8    28.5    -      -       -      +
    214B  LYS*     3.7    31.2    -      -       +      -
    210C  ALA      3.1    19.5    +      -       -      +
    211C  ALA      3.3     4.2    +      -       -      +
    213C  TYR*     1.3    75.7    -      -       -      +
    215C  ALA*     1.3    58.5    +      -       -      +
    217C  SER*     3.2     5.8    +      -       -      -
    218C  ASP*     2.8    66.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 215 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    167C  ALA*     3.5    34.1    -      -       +      +
    168C  ASN*     4.3     5.2    -      -       -      +
    171C  ALA*     4.0     5.6    -      -       +      -
    211C  ALA      3.0    17.1    +      -       -      +
    212C  VAL      3.5     3.4    -      -       -      +
    214C  LYS*     1.3    75.3    -      -       -      +
    216C  LEU*     1.3    65.1    +      -       -      +
    218C  ASP*     3.2     8.8    +      -       -      +
    219C  HIS*     2.9    32.8    +      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 216 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    167C  ALA      5.4     0.4    -      -       -      +
    170C  LEU*     4.5     2.7    -      -       +      +
    171C  ALA*     3.9    21.5    -      -       -      +
    174C  ALA*     4.3     9.9    -      -       +      -
    186C  VAL*     4.6    17.5    -      -       +      -
    212C  VAL*     2.9    31.9    +      -       +      +
    213C  TYR*     3.5    37.9    -      -       +      +
    215C  ALA*     1.3    76.9    -      -       -      +
    217C  SER*     1.3    61.7    +      -       -      +
    220C  HIS      3.2     4.3    +      -       -      -
    221C  ILE*     2.9    57.2    +      -       +      +
    223C  LEU*     3.9    16.8    -      -       +      -
    226C  THR*     5.3     2.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 217 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    206B  GLU      4.6     1.4    +      -       -      -
    207B  LYS*     2.8    42.4    +      -       -      +
    210B  ALA*     3.4    30.6    -      -       -      +
    259B  THR*     5.9     0.2    -      -       -      +
    213C  TYR      3.2    14.4    +      -       -      -
    214C  LYS*     3.3     9.4    -      -       -      -
    215C  ALA      3.1     0.4    -      -       -      -
    216C  LEU*     1.3    74.5    -      -       -      +
    218C  ASP*     1.3    67.4    +      -       -      +
    220C  HIS*     3.0     5.4    +      -       -      +
    221C  ILE      4.9     2.7    -      -       -      +
    223C  LEU*     5.8     0.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 218 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    207B  LYS*     5.1     1.9    -      -       -      +
    214C  LYS*     2.8    56.7    +      -       -      +
    215C  ALA*     3.2     8.1    +      -       -      +
    217C  SER*     1.3    78.7    +      -       -      +
    219C  HIS*     1.3    66.7    -      -       +      +
    220C  HIS*     3.5    12.6    +      -       -      -
    161D  LEU*     3.5    22.6    -      -       +      +
    164D  MET*     4.6    16.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with HIS 219 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    168C  ASN*     2.8    32.5    +      -       -      -
    171C  ALA*     3.4    27.4    +      -       +      +
    172C  ARG*     3.7    39.0    +      -       +      -
    175C  SER*     4.3    11.1    +      -       -      -
    215C  ALA*     2.9    29.3    +      -       -      +
    216C  LEU      3.4     2.7    +      -       -      +
    217C  SER      3.1     0.2    -      -       -      -
    218C  ASP*     1.3    80.5    -      -       +      +
    220C  HIS*     1.3    73.9    +      -       -      +
    221C  ILE*     3.4    10.2    +      -       +      +
    115D  LEU*     5.4     2.0    -      -       +      +
    116D  ALA*     4.4     4.3    -      -       -      +
    161D  LEU*     3.7    31.9    -      -       +      +
    164D  MET*     3.9     2.5    -      -       +      +
    165D  GLU*     4.1     6.7    -      -       +      -
----------------------------------------------------------
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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