Contacts of the helix formed by residues 120 - 145 (chain E) in PDB entry 3BVI


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 LEU 120 (chain E).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     10E  LEU*     4.4    14.8    -      -       +      -
     57E  LEU*     4.5     2.2    -      -       +      -
    101E  ILE*     5.3     2.0    -      -       +      +
    104E  ILE*     3.7    33.0    -      -       +      +
    105E  VAL*     3.9    30.5    -      -       +      +
    108E  ALA*     5.1     0.7    -      -       +      -
    116E  THR*     2.9    33.1    +      -       +      +
    117E  PHE*     3.7     7.4    -      -       -      +
    118E  ASN      3.3     0.6    -      -       -      -
    119E  PHE*     1.3    89.7    -      -       +      +
    121E  GLN*     1.3    58.3    +      -       -      +
    122E  TRP      3.5     0.9    -      -       -      -
    123E  TYR*     3.0    32.3    +      -       +      +
    124E  VAL*     2.9    30.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 121 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121D  GLN*     5.5     1.8    -      -       -      +
    105E  VAL*     4.5     9.3    -      -       -      +
    117E  PHE*     3.0    57.1    +      -       +      +
    118E  ASN*     3.7    15.7    -      -       -      +
    119E  PHE      3.2     2.4    -      -       -      -
    120E  LEU*     1.3    74.1    -      -       -      +
    122E  TRP*     1.3    67.0    +      -       -      +
    123E  TYR      3.0     1.3    -      -       -      -
    124E  VAL*     3.3    17.5    +      -       -      +
    125E  ALA*     3.1    24.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with TRP 122 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     53E  HIS*     3.6    24.7    -      +       -      -
     56E  LYS*     3.5    47.3    -      -       +      -
     57E  LEU*     4.9     3.1    -      -       +      -
    118E  ASN      4.9     0.6    +      -       -      -
    119E  PHE*     2.8    58.4    +      +       -      -
    121E  GLN*     1.3    76.9    -      -       -      +
    123E  TYR*     1.3    88.9    +      +       +      +
    125E  ALA*     3.6     5.2    +      -       -      +
    126E  GLU*     3.0    65.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 123 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     13E  GLN*     2.9    33.6    +      -       +      +
     17E  GLU*     2.5    37.3    +      -       -      +
     53E  HIS*     4.0    21.1    -      +       +      -
     57E  LEU*     4.2    16.8    -      -       +      -
    101E  ILE*     3.5    34.1    -      -       +      +
    104E  ILE*     5.5     0.9    -      -       +      -
    120E  LEU*     3.0    32.3    +      -       +      +
    121E  GLN      3.0     0.4    -      -       -      -
    122E  TRP*     1.3   115.1    -      +       +      +
    124E  VAL*     1.3    64.5    +      -       -      +
    126E  GLU*     4.5     0.4    -      -       -      +
    127E  GLN*     3.0    28.5    +      -       +      +
   1006E   FE      4.2     1.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 124 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101E  ILE*     3.8    24.9    -      -       +      -
    102E  ASN*     5.1    10.3    -      -       -      +
    105E  VAL*     3.8    18.6    -      -       +      -
    120E  LEU      2.9    20.4    +      -       -      +
    121E  GLN*     3.8    20.2    -      -       -      +
    123E  TYR*     1.3    77.2    -      -       -      +
    125E  ALA*     1.3    62.5    +      -       -      +
    127E  GLN*     3.5     3.0    +      -       -      +
    128E  HIS*     3.1    25.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 125 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121E  GLN      3.1    15.6    +      -       -      +
    122E  TRP*     3.9     5.8    -      -       -      +
    124E  VAL*     1.3    77.0    -      -       -      +
    126E  GLU*     1.3    65.9    +      -       +      +
    128E  HIS*     3.4     7.8    +      -       -      +
    129E  GLU*     3.2    22.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 126 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     49E  GLU*     4.1     5.8    -      -       -      +
     53E  HIS*     3.2    28.8    +      -       +      +
     56E  LYS*     4.1    11.3    +      -       -      -
    122E  TRP*     3.0    44.8    +      -       +      +
    123E  TYR*     4.3     2.0    -      -       -      +
    125E  ALA*     1.3    77.4    -      -       +      +
    127E  GLN*     1.3    63.1    +      -       -      +
    129E  GLU*     3.4    10.6    +      -       -      +
    130E  GLU*     3.1    31.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 127 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     53E  HIS*     5.4     1.1    -      -       -      -
     94E  GLU*     2.8    46.3    +      -       -      +
     97E  ILE*     3.6    11.0    -      -       -      +
     98E  SER*     3.3    21.9    +      -       -      +
    101E  ILE*     3.5    22.2    -      -       +      +
    123E  TYR*     3.0    22.7    +      -       +      +
    124E  VAL*     3.9     3.4    -      -       -      +
    126E  GLU*     1.3    76.2    -      -       -      +
    128E  HIS*     1.3    57.9    +      -       -      +
    130E  GLU*     3.1     4.6    +      -       -      +
    131E  GLU*     2.8    27.3    +      -       -      +
   1006E   FE      2.9    12.3    -      -       -      -
   1007E   FE      2.5    23.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with HIS 128 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98E  SER*     5.2     0.2    -      -       -      -
    124E  VAL*     3.1    19.8    +      -       +      +
    125E  ALA*     3.7     7.2    -      -       -      +
    127E  GLN*     1.3    77.2    -      -       -      +
    129E  GLU*     1.3    64.2    +      -       +      +
    131E  GLU*     3.2    15.4    +      -       -      +
    132E  VAL*     3.0    48.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 129 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    125E  ALA      3.2    12.1    +      -       -      +
    126E  GLU*     3.6    13.0    -      -       -      +
    128E  HIS*     1.3    82.9    -      -       +      +
    130E  GLU*     1.3    58.9    +      -       +      +
    132E  VAL*     3.5     6.7    +      -       -      +
    133E  LEU*     3.0    27.5    +      -       -      +
    165E  ARG*     3.5    32.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 130 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46E  HIS*     3.4    22.9    -      -       +      +
     49E  GLU*     3.9    12.8    -      -       -      +
     50E  GLU*     2.9     6.4    -      -       -      +
     53E  HIS*     2.9    28.8    +      -       -      -
     94E  GLU*     4.2     2.7    -      -       -      +
    126E  GLU*     3.1    18.4    +      -       -      +
    127E  GLN*     3.4     8.9    -      -       -      +
    129E  GLU*     1.3    78.6    -      -       +      +
    131E  GLU*     1.3    61.2    +      -       -      +
    133E  LEU*     3.3     7.9    +      -       +      +
    134E  PHE*     3.1    32.7    +      -       -      -
    165E  ARG*     5.6     4.5    -      -       -      +
   1007E   FE      2.1    38.0    -      -       -      -
   1010E  GOL      4.6     6.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 131 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91E  TYR*     3.6    20.7    +      -       +      -
     94E  GLU*     4.2    21.5    -      -       +      -
     95E  GLN*     3.4    24.2    -      -       -      +
     98E  SER*     2.6    35.1    +      -       -      +
    127E  GLN*     2.8    21.2    +      -       -      +
    128E  HIS*     3.2    14.2    +      -       -      +
    130E  GLU*     1.3    73.5    -      -       -      +
    132E  VAL*     1.3    58.5    +      -       +      +
    134E  PHE*     3.5     0.9    +      -       -      -
    135E  LYS*     3.1    26.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 132 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128E  HIS*     3.0    48.5    +      -       +      +
    129E  GLU*     3.8     6.3    -      -       -      +
    131E  GLU*     1.3    74.1    -      -       +      +
    133E  LEU*     1.3    61.4    +      -       -      +
    135E  LYS*     3.3    23.2    +      -       -      +
    136E  ASP*     2.8    42.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 133 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     42E  PHE*     3.6    31.4    -      -       +      -
    129E  GLU      3.0    18.3    +      -       -      +
    130E  GLU*     3.3     8.9    +      -       -      +
    132E  VAL*     1.3    76.5    -      -       -      +
    134E  PHE*     1.3    60.3    +      -       +      +
    136E  ASP*     3.2    12.1    +      -       +      +
    137E  ILE*     2.9    37.4    +      -       +      +
    161E  ILE*     3.9    29.4    -      -       +      -
    165E  ARG*     3.8    35.9    -      -       -      +
   1010E  GOL      4.1     8.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 134 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     24E  TYR*     3.9     8.3    -      +       -      -
     42E  PHE*     3.6    32.1    -      +       -      -
     43E  LEU*     4.1     4.5    -      -       +      -
     46E  HIS*     3.5    46.0    -      +       -      -
     87E  PHE*     3.9    21.0    -      +       -      +
     90E  ALA*     3.6    33.4    -      -       +      -
     91E  TYR*     4.3    19.6    -      -       +      +
     94E  GLU*     3.9    14.6    -      -       +      -
    130E  GLU      3.1    28.3    +      -       -      +
    131E  GLU      4.0     3.8    -      -       -      +
    132E  VAL      3.3     0.2    -      -       -      -
    133E  LEU*     1.3    76.3    -      -       +      +
    135E  LYS*     1.3    60.6    +      -       -      +
    137E  ILE*     4.0     4.3    -      -       -      +
    138E  LEU*     2.9    31.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 135 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91E  TYR*     3.6    37.5    -      -       +      +
    131E  GLU      3.1    14.8    +      -       -      +
    132E  VAL*     3.4    24.9    -      -       -      +
    134E  PHE*     1.3    76.2    -      -       -      +
    136E  ASP*     1.3    79.1    +      -       -      +
    138E  LEU*     3.7     3.4    -      -       -      +
    139E  ASP*     2.9    49.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 136 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132E  VAL*     2.8    31.9    +      -       -      +
    133E  LEU*     3.4    15.2    -      -       +      +
    135E  LYS*     1.3   104.2    +      -       -      +
    137E  ILE*     1.3    59.0    +      -       +      +
    139E  ASP*     3.6     7.3    +      -       -      +
    140E  LYS*     3.1    30.1    +      -       -      +
    157E  TYR*     5.2     4.7    +      -       +      +
    161E  ILE*     6.1     1.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 137 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     42E  PHE*     3.2    46.9    -      -       +      -
     87E  PHE*     3.6    27.4    -      -       +      -
    133E  LEU*     2.9    26.9    +      -       +      +
    134E  PHE*     4.0     4.7    -      -       -      +
    136E  ASP*     1.3    71.5    -      -       -      +
    138E  LEU*     1.3    65.8    +      -       -      +
    140E  LYS*     3.1     8.0    +      -       -      +
    141E  ILE*     2.9    28.4    +      -       +      +
    157E  TYR*     5.1     2.7    -      -       +      -
    158E  VAL*     3.6    24.9    -      -       +      -
    161E  ILE*     3.9    24.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 138 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     84E  THR*     4.2    10.1    -      -       +      +
     87E  PHE*     3.7    20.1    -      -       +      +
     88E  GLN*     3.9    42.2    -      -       +      +
     91E  TYR*     4.0    24.2    -      -       +      -
    134E  PHE      2.9    19.0    +      -       -      +
    135E  LYS*     3.7     4.9    -      -       -      +
    137E  ILE*     1.3    76.9    -      -       -      +
    139E  ASP*     1.3    64.8    +      -       -      +
    141E  ILE*     3.3    10.3    +      -       +      +
    142E  GLU*     3.0    48.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 139 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    135E  LYS*     2.9    38.5    +      -       -      +
    136E  ASP*     3.6     8.1    -      -       -      +
    138E  LEU*     1.3    77.4    -      -       -      +
    140E  LYS*     1.3    59.5    -      -       +      +
    142E  GLU*     3.5    12.4    +      -       -      +
    143E  LEU*     2.9    28.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 140 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    136E  ASP      3.1    14.3    +      -       -      +
    137E  ILE*     3.1     9.8    +      -       +      +
    139E  ASP*     1.3    74.5    -      -       +      +
    141E  ILE*     1.3    62.1    +      -       +      +
    143E  LEU*     3.2    28.7    +      -       -      +
    144E  ILE*     2.9    45.9    +      -       +      +
    157E  TYR*     3.6    52.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 141 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     83E  LEU*     4.1    24.5    -      -       +      +
     84E  THR*     3.4    35.0    -      -       +      +
     87E  PHE*     3.4    46.0    -      -       +      -
    137E  ILE*     2.9    27.1    +      -       +      +
    138E  LEU*     3.7     7.0    -      -       +      +
    140E  LYS*     1.3    75.7    -      -       +      +
    142E  GLU*     1.3    63.6    +      -       +      +
    144E  ILE*     3.3     1.6    +      -       -      +
    145E  GLY*     3.1    23.9    +      -       -      +
    151E  LEU*     6.0     1.6    -      -       +      -
    154E  ALA*     4.4    18.0    -      -       +      +
    158E  VAL*     4.9     4.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 142 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     84E  THR*     4.1    20.7    -      -       +      +
     88E  GLN*     4.1    15.1    +      -       -      +
    138E  LEU*     3.0    45.1    +      -       +      +
    139E  ASP*     3.9    12.4    -      -       -      +
    141E  ILE*     1.3    78.0    -      -       -      +
    143E  LEU*     1.3    60.6    +      -       -      +
    144E  ILE      3.6     0.2    +      -       -      -
    145E  GLY*     3.8     8.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 143 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    139E  ASP      2.9    18.9    +      -       -      +
    140E  LYS*     3.2    35.6    +      -       +      +
    142E  GLU*     1.3    78.8    -      -       -      +
    144E  ILE*     1.3    66.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 144 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    140E  LYS*     2.9    39.0    +      -       +      +
    141E  ILE*     3.9     3.8    -      -       +      +
    143E  LEU*     1.3    81.2    -      -       +      +
    145E  GLY*     1.3    63.3    +      -       -      +
    147E  GLU*     5.5     0.7    +      -       -      +
    150E  GLY*     3.2    34.5    -      -       -      +
    153E  LEU*     4.1    19.7    -      -       +      +
    154E  ALA*     3.6    29.2    -      -       +      +
    157E  TYR*     4.7     8.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 145 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    141E  ILE*     3.1    15.4    +      -       -      +
    142E  GLU      3.8     6.9    +      -       -      -
    143E  LEU      3.5     2.0    -      -       -      -
    144E  ILE*     1.3    80.1    -      -       -      +
    146E  ASN*     1.3    60.1    +      -       -      +
    147E  GLU*     3.7     3.8    -      -       -      -
    150E  GLY*     3.6    20.6    -      -       -      +
    151E  LEU*     3.9     1.9    +      -       -      +
    154E  ALA*     5.5     1.4    -      -       -      +
----------------------------------------------------------
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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