Contacts of the helix formed by residues 192 - 216 (chain A) in PDB entry 7A62


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 GLU 192 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    187A  ALA*     3.0    15.2    +      -       -      +
    190A  MET*     3.7    29.0    -      -       +      +
    191A  GLN*     1.3    74.5    -      -       -      +
    193A  ARG*     1.3    65.4    +      -       -      +
    194A  ASP*     3.3     3.0    -      -       -      +
    195A  THR*     3.4    24.1    +      -       +      +
    196A  LEU*     3.1    22.8    +      -       -      +
    319A  PHE*     5.9     1.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 193 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    191A  GLN      3.7     5.6    +      -       -      +
    192A  GLU*     1.3    73.9    -      -       -      +
    194A  ASP*     1.3    88.7    +      -       -      +
    196A  LEU*     3.4     8.6    +      -       -      +
    197A  LEU*     3.1    36.0    +      -       -      +
    319A  PHE*     6.1     3.1    -      -       +      -
    325A  ASP*     2.7    42.9    +      -       -      +
    327A  GLY*     3.7    17.0    -      -       -      +
    328A  LEU*     4.1    16.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 194 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    192A  GLU*     3.3     1.0    +      -       -      +
    193A  ARG*     1.3   106.7    +      -       -      +
    195A  THR*     1.3    58.3    +      -       -      +
    197A  LEU*     3.2     6.8    +      -       -      +
    198A  LYS*     2.9    30.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 195 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    183A  THR*     4.0    24.9    -      -       +      -
    187A  ALA*     4.0    10.8    -      -       +      -
    192A  GLU*     3.4    28.2    +      -       +      +
    193A  ARG      3.4     0.4    -      -       -      -
    194A  ASP*     1.3    77.9    -      -       -      +
    196A  LEU*     1.3    59.3    +      -       -      +
    198A  LYS*     3.3     7.2    +      -       -      +
    199A  ALA*     2.8    28.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 196 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    184A  VAL*     3.8    37.9    -      -       +      +
    187A  ALA*     3.7    12.5    -      -       +      +
    188A  MET*     4.2     9.2    -      -       +      +
    192A  GLU      3.1    16.6    +      -       -      +
    193A  ARG*     3.7     4.7    -      -       -      +
    194A  ASP      3.3     0.2    -      -       -      -
    195A  THR*     1.3    76.8    -      -       -      +
    197A  LEU*     1.3    58.3    +      -       -      +
    199A  ALA*     3.3     3.8    +      -       -      +
    200A  LEU*     2.9    43.6    +      -       +      +
    316A  VAL*     5.3     2.5    -      -       +      -
    319A  PHE*     3.5    38.6    -      -       +      -
    320A  VAL*     5.0     3.6    -      -       +      -
    328A  LEU*     4.1    20.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 197 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    193A  ARG*     3.1    33.8    +      -       -      +
    194A  ASP*     3.7     7.0    -      -       -      +
    196A  LEU*     1.3    75.7    -      -       -      +
    198A  LYS*     1.3    69.4    +      -       +      +
    200A  LEU*     3.3     5.2    +      -       -      +
    201A  LEU*     3.1    41.2    +      -       +      +
    327A  GLY*     3.2    42.6    -      -       -      +
    328A  LEU*     3.7    15.5    -      -       +      +
    331A  ALA*     4.0     7.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 198 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    194A  ASP      2.9    16.7    +      -       -      +
    195A  THR*     3.7     6.5    -      -       -      +
    197A  LEU*     1.3    80.5    -      -       +      +
    199A  ALA*     1.3    64.8    +      -       -      +
    201A  LEU*     3.3    16.4    +      -       +      +
    202A  GLU*     2.9    39.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 199 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    180A  VAL*     3.6    22.9    -      -       +      +
    183A  THR*     4.3    15.3    -      -       +      -
    184A  VAL*     3.8    15.7    -      -       +      +
    195A  THR      2.8    17.5    +      -       -      +
    196A  LEU*     3.6     7.6    -      -       -      +
    198A  LYS*     1.3    77.2    -      -       -      +
    200A  LEU*     1.3    62.3    +      -       -      +
    202A  GLU*     3.3     5.8    +      -       -      +
    203A  ILE*     3.1    27.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 200 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    184A  VAL*     4.5    15.9    -      -       +      -
    196A  LEU*     2.9    41.8    +      -       +      +
    197A  LEU      3.8     3.6    -      -       -      +
    198A  LYS      3.3     0.4    -      -       -      -
    199A  ALA*     1.3    76.3    -      -       -      +
    201A  LEU*     1.3    62.8    +      -       -      +
    203A  ILE*     3.2     7.2    +      -       +      -
    204A  ALA*     3.0    18.7    +      -       -      +
    276A  LEU*     5.6     2.5    -      -       +      -
    277A  LEU*     5.1     7.4    -      -       +      -
    316A  VAL*     4.6    15.3    -      -       +      -
    320A  VAL*     4.6     9.9    -      -       +      -
    328A  LEU*     4.5     7.0    -      -       +      +
    331A  ALA*     3.9    19.7    -      -       +      +
    332A  TYR*     4.2    25.4    -      -       +      +
    335A  CYS*     3.1    23.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 201 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    197A  LEU*     3.1    36.5    +      -       +      +
    198A  LYS*     3.5    19.3    -      -       +      +
    200A  LEU*     1.3    76.3    -      -       -      +
    202A  GLU*     1.3    58.4    +      -       -      +
    204A  ALA*     3.3     5.7    +      -       +      +
    205A  SER*     2.9    29.5    +      -       -      -
    330A  GLU*     5.3     0.9    -      -       +      -
    331A  ALA*     3.7    26.0    -      -       +      -
    334A  ALA*     4.4    12.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 202 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    176A  SER*     4.9     2.6    +      -       -      +
    180A  VAL*     3.8    24.0    -      -       +      +
    198A  LYS*     2.9    32.9    +      -       +      +
    199A  ALA*     3.5     7.6    -      -       -      +
    200A  LEU      3.2     0.2    -      -       -      -
    201A  LEU*     1.3    76.6    -      -       -      +
    203A  ILE*     1.3    57.1    +      -       -      +
    205A  SER*     3.2     9.5    +      -       -      -
    206A  CYS*     2.9    48.6    +      -       -      -
    209A  LYS*     5.3     3.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 203 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    177A  ALA*     3.7    20.5    -      -       +      +
    180A  VAL*     3.7    30.7    -      -       +      -
    181A  ILE*     4.6     4.9    -      -       +      -
    184A  VAL*     4.0    17.7    -      -       +      -
    199A  ALA      3.1    14.5    +      -       -      +
    200A  LEU*     3.5    11.4    -      -       +      +
    202A  GLU*     1.3    75.1    -      -       -      +
    204A  ALA*     1.3    57.3    +      -       -      +
    206A  CYS*     3.2     2.3    +      -       -      +
    207A  LEU*     2.8    36.8    +      -       +      +
    273A  PHE*     3.9    24.0    -      -       +      -
    276A  LEU*     4.2    19.3    -      -       +      -
    335A  CYS*     3.7    15.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 204 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    200A  LEU      3.0    11.5    +      -       -      +
    201A  LEU*     3.7     7.9    -      -       +      +
    203A  ILE*     1.3    77.1    -      -       -      +
    205A  SER*     1.3    58.4    +      -       -      +
    207A  LEU*     3.3     6.1    +      -       -      +
    208A  GLU*     2.8    35.3    +      -       +      +
    334A  ALA*     3.5    44.6    -      -       +      +
    335A  CYS*     3.6     9.9    -      -       -      +
    338A  ALA*     4.0     1.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 205 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    201A  LEU      2.9    17.2    +      -       -      -
    202A  GLU*     3.5    11.8    +      -       -      -
    204A  ALA*     1.3    77.6    -      -       -      +
    206A  CYS*     1.3    59.0    +      -       -      +
    208A  GLU*     3.1     9.5    +      -       -      +
    209A  LYS*     2.9    52.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with CYS 206 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    173A  ALA      4.5     6.2    -      -       -      +
    174A  ALA*     6.0     0.2    -      -       -      -
    176A  SER*     3.7    34.3    -      -       -      -
    177A  ALA*     3.8    20.0    -      -       +      +
    202A  GLU*     2.9    42.6    +      -       -      +
    203A  ILE      3.8     2.9    -      -       -      +
    205A  SER*     1.3    76.7    -      -       -      +
    207A  LEU*     1.3    60.7    +      -       -      +
    209A  LYS*     3.1    18.8    +      -       -      +
    210A  ALA*     2.8    27.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 207 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    174A  ALA*     5.2     7.4    -      -       +      -
    177A  ALA*     4.3     5.4    -      -       +      -
    203A  ILE*     2.8    35.7    +      -       +      +
    204A  ALA*     3.7     4.7    -      -       -      +
    206A  CYS*     1.3    76.9    -      -       -      +
    208A  GLU*     1.3    58.3    +      -       -      +
    210A  ALA*     3.3    10.2    +      -       +      +
    211A  LEU*     3.1    24.6    +      -       -      +
    269A  VAL*     5.3     3.4    -      -       +      -
    273A  PHE*     4.1    40.8    -      -       +      -
    277A  LEU*     6.0     0.9    -      -       +      -
    335A  CYS*     4.3    12.1    -      -       +      +
    338A  ALA*     3.8    22.1    -      -       +      +
    339A  LEU*     4.5    10.3    -      -       +      +
    342A  LEU*     4.1    23.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 208 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    204A  ALA*     2.8    18.5    +      -       +      +
    205A  SER*     3.1    11.0    +      -       -      +
    207A  LEU*     1.3    76.0    -      -       -      +
    209A  LYS*     1.3    65.2    +      -       +      +
    211A  LEU*     3.2    35.7    +      -       -      +
    212A  GLN*     3.4    19.4    +      -       -      +
    337A  LYS*     4.9     0.5    -      -       -      +
    338A  ALA*     3.6    26.8    +      -       +      +
    341A  SER*     3.9    10.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 209 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    173A  ALA*     4.8     3.4    -      -       +      -
    202A  GLU*     5.3     4.0    +      -       -      -
    205A  SER*     2.9    35.9    +      -       -      +
    206A  CYS*     3.6    19.4    -      -       -      +
    208A  GLU*     1.3    74.3    -      -       +      +
    210A  ALA*     1.3    65.2    +      -       -      +
    212A  GLN*     3.1    17.8    +      -       -      +
    213A  VAL*     3.2    19.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 210 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    170A  VAL*     4.5    14.3    -      -       +      +
    173A  ALA*     3.7    23.7    -      -       +      +
    174A  ALA*     4.4    12.3    -      -       +      +
    206A  CYS      2.8    13.7    +      -       -      +
    207A  LEU*     3.5    15.9    -      -       +      +
    208A  GLU      3.2     0.2    -      -       -      -
    209A  LYS*     1.3    78.1    -      -       -      +
    211A  LEU*     1.3    60.0    +      -       -      +
    213A  VAL*     3.3     4.2    +      -       -      +
    214A  PHE*     3.2    20.3    +      -       -      +
    342A  LEU*     4.3    11.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 211 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    207A  LEU      3.1    12.4    +      -       -      +
    208A  GLU*     3.4    28.3    -      -       -      +
    209A  LYS      3.2     0.4    -      -       -      -
    210A  ALA*     1.3    77.4    -      -       -      +
    212A  GLN*     1.3    68.3    +      -       -      +
    214A  PHE*     3.2    13.0    +      -       +      +
    215A  HIS*     2.8    26.8    +      -       +      -
    338A  ALA      5.8     0.2    -      -       -      +
    341A  SER*     3.8    27.8    -      -       -      +
    342A  LEU*     3.7    20.1    -      -       +      +
    345A  TYR*     3.5    39.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 212 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    208A  GLU*     3.7    13.9    +      -       -      +
    209A  LYS*     3.1    11.0    +      -       -      +
    211A  LEU*     1.3    87.5    -      -       -      +
    213A  VAL*     1.3    69.4    +      -       +      +
    215A  HIS*     2.9    47.7    +      -       -      +
    216A  GLN*     4.1     3.3    +      -       -      +
    222D  ASN*     5.9     2.6    -      -       -      +
    223D  PRO*     5.5     6.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 213 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    166A  VAL*     4.2     4.5    -      -       +      +
    169A  LEU*     3.6    36.8    -      -       +      +
    170A  VAL*     3.8     7.9    -      -       +      +
    173A  ALA*     3.9    16.6    -      -       +      -
    209A  LYS*     3.2    15.3    +      -       +      +
    210A  ALA*     3.5     9.2    -      -       -      +
    212A  GLN*     1.3    75.6    -      -       +      +
    214A  PHE*     1.3    64.4    +      -       -      +
    216A  GLN*     3.0    44.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 214 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    166A  VAL*     4.5     2.6    -      -       +      +
    170A  VAL*     4.0    17.7    -      -       +      +
    210A  ALA      3.2    10.9    +      -       -      +
    211A  LEU*     3.3    15.0    -      -       -      +
    212A  GLN      3.1     0.2    -      -       -      -
    213A  VAL*     1.3    77.7    -      -       -      +
    215A  HIS*     1.3    60.4    +      -       -      +
    216A  GLN      3.1     1.2    +      -       -      -
    217A  ILE*     3.3    25.5    +      -       +      +
    270A  PHE*     5.0     6.1    -      +       -      -
    342A  LEU*     4.5    18.6    -      -       +      -
    345A  TYR*     3.9    21.1    -      +       +      -
    346A  HIS*     4.0    26.0    -      +       +      -
    349A  ILE*     3.9    22.2    -      -       +      -
    502A  HEM      3.6    55.0    -      +       +      -
----------------------------------------------------------
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Residues in contact with HIS 215 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    211A  LEU*     2.8    35.3    +      -       +      -
    212A  GLN*     2.9    40.2    +      -       -      +
    214A  PHE*     1.3    77.5    -      -       -      +
    216A  GLN*     1.3    58.2    +      -       +      +
    217A  ILE      2.9     6.5    +      -       -      -
    218A  HIS*     3.1    24.7    +      -       +      +
    219A  ASP*     4.5     1.6    +      -       -      +
    345A  TYR*     3.3    43.0    -      +       -      +
    218D  HIS*     4.3    19.1    -      -       +      +
    219D  ASP*     4.5     3.4    -      -       -      +
    222D  ASN*     6.5     1.1    -      -       +      -
    352D  LYS*     5.5     8.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 216 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    145A  TYR*     4.4    11.1    -      -       -      +
    166A  VAL*     4.2    11.6    -      -       +      +
    169A  LEU*     3.9    23.4    -      -       -      +
    212A  GLN      4.6     2.0    -      -       -      +
    213A  VAL*     3.0    43.2    +      -       -      +
    215A  HIS*     1.3    75.0    -      -       -      +
    217A  ILE*     1.3    63.0    +      -       -      +
    218A  HIS      3.1     0.7    -      -       -      -
    219A  ASP*     3.1    24.0    +      -       -      +
    220A  HIS*     3.4    25.8    +      -       +      +
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


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

Legend:
+, legitimate
-, illegitimate
------------------------------------------------------------
  Atomic class           I  II  III   IV   V   VI  VII  VIII
------------------------------------------------------------
   I  (Hydrophilic)      +   +    +    -   +   +    +    +
  II  (Acceptor)         +   -    +    -   +   +    +    -
 III  (Donor)            +   +    -    -   +   +    -    +
  IV  (Hydrophobic)      -   -    -    +   +   +    +    +
   V  (Aromatic)         +   +    +    +   +   +    +    +
  VI  (Neutral)          +   +    +    +   +   +    +    +
 VII  (Neutral-donor)    +   +    -    +   +   +    -    +
VIII  (Neutral-acceptor) +   -    +    +   +   +    +    -
------------------------------------------------------------
Warning!
Atom classes for heterogroups are automatically assigned based on the atomic coordinates. However, in three cases (see below) the automatic assignment is currently ambiguous. In these cases, the user is advised to manually analyse the full list of contacts using LPC software.
1. Carbon atoms belonging to a 4-, 5- or 6-member ring are 
   considered "aromatic" (Class V) if the ring is approximately
   planar, and "hydrophobic" (Class IV) or "neutral" (Classes
   VI, VII, VIII) if the ring is non-planar.
2. The oxygen atom of a carbonyl or hydroxy group is considered
   "hydroxy" (Class I) if the CO bond is longer than 1.29 Å, and
   "carbonyl" (Class II) if shorter.
3. All nitrogen atoms are considered "hydrophilic" (Class I).

Please E-mail any questions and/or suggestions concerning this page to Vladimir.Sobolev@weizmann.ac.il