Contacts of the helix formed by residues 220 - 244 (chain E) in PDB entry 5J0Z


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 SER 220 (chain E).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    221A  TYR*     4.9     4.9    -      -       -      -
    222A  GLU*     4.0    25.5    +      -       -      +
    277A  HIS*     4.9     7.2    -      -       -      -
    218E  SER*     3.2    10.9    +      -       -      -
    219E  THR*     1.3    76.5    -      -       -      +
    221E  TYR*     1.3    55.0    +      -       -      +
    222E  GLU*     3.2    15.4    +      -       -      +
    223E  ALA*     3.0    14.0    +      -       -      +
    224E  ASN*     2.7    36.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 221 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    214D  THR      3.6    10.7    +      -       -      -
    218D  SER*     3.2    29.2    -      -       -      -
    220D  SER*     4.8     2.5    -      -       -      -
    223D  ALA*     4.1    16.2    -      -       +      -
    227D  LEU*     3.2    22.0    -      -       +      +
    219E  THR      3.8     3.4    +      -       -      -
    220E  SER*     1.3    68.7    -      -       -      +
    222E  GLU*     1.3    72.7    +      -       -      +
    223E  ALA      2.9     0.9    +      -       -      -
    224E  ASN*     2.9     7.4    +      -       -      +
    225E  VAL*     2.8    49.8    +      -       +      +
    273E  VAL*     3.6    23.6    -      -       +      -
    274E  THR*     3.3    29.0    +      -       +      +
    277E  HIS*     3.4    52.3    -      +       +      +
----------------------------------------------------------
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Residues in contact with GLU 222 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    222A  GLU*     5.5     8.7    -      -       +      -
    220D  SER*     3.8    25.6    +      -       -      +
    222D  GLU*     5.5     6.7    -      -       +      -
    223D  ALA*     4.1    19.6    -      -       +      +
    226D  THR*     5.5     1.7    +      -       -      +
    219E  THR      5.1     0.5    -      -       -      +
    220E  SER*     3.5    16.9    +      -       -      +
    221E  TYR*     1.3    95.4    +      -       -      +
    223E  ALA*     1.3    54.9    +      -       -      +
    225E  VAL*     4.5     2.6    -      -       -      +
    226E  THR*     3.1    19.1    +      -       -      -
    277E  HIS*     5.1     6.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 223 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    221A  TYR*     4.0    24.2    -      -       +      -
    222A  GLU*     4.2    23.7    -      -       -      +
    225A  VAL*     4.2     8.6    -      -       +      +
    220E  SER*     3.0    21.4    +      -       -      +
    221E  TYR      2.9     0.2    +      -       -      -
    222E  GLU*     1.3    76.0    -      -       -      +
    224E  ASN*     1.3    60.6    +      -       -      +
    225E  VAL      3.3     1.6    -      -       -      -
    226E  THR*     3.1     9.9    +      -       -      -
    227E  LEU*     2.8    28.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 224 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    221A  TYR*     4.6     1.6    -      -       -      -
    215E  ALA*     3.2    33.2    +      -       +      +
    218E  SER*     2.7    39.3    +      -       -      -
    220E  SER      2.7    22.7    +      -       -      +
    221E  TYR*     2.9     3.7    +      -       -      +
    223E  ALA*     1.3    69.6    -      -       -      +
    225E  VAL*     1.3    68.0    +      -       -      +
    227E  LEU*     3.4     8.3    -      -       -      +
    228E  VAL*     2.8    28.9    +      -       -      +
    273E  VAL*     3.7    23.3    -      -       +      +
    276E  GLN*     3.5    14.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 225 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    223D  ALA*     4.0    10.5    -      -       +      +
    226D  THR*     4.0    10.1    -      -       +      -
    227D  LEU*     3.8    44.2    -      -       +      +
    221E  TYR*     2.8    58.3    +      -       +      +
    222E  GLU      4.5     3.6    -      -       -      +
    224E  ASN*     1.3    71.3    -      -       -      +
    226E  THR*     1.3    59.3    +      -       -      +
    228E  VAL*     5.1     1.3    -      -       -      -
    229E  VAL*     2.8    44.9    +      -       +      +
    273E  VAL*     4.7     3.6    -      -       +      -
    274E  THR*     5.8     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 226 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    222A  GLU      5.5     1.6    +      -       -      +
    225A  VAL*     4.0    17.0    -      -       +      -
    226A  THR*     4.1    23.8    +      -       +      +
    229A  VAL*     5.8     1.1    -      -       +      -
    226D  THR*     4.0    20.6    +      -       +      +
    222E  GLU      3.1    15.8    +      -       -      -
    223E  ALA*     3.1    11.2    +      -       -      -
    225E  VAL*     1.3    77.6    -      -       -      +
    227E  LEU*     1.3    62.6    +      -       -      +
    229E  VAL*     5.1     0.4    -      -       -      -
    230E  SER*     2.7    42.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 227 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    221A  TYR*     3.1    35.7    -      -       +      +
    225A  VAL*     3.8    22.6    -      -       +      +
    229A  VAL*     4.7     5.8    -      -       +      +
    270A  VAL*     5.0     3.1    -      -       +      -
    211E  ILE*     3.4    34.3    -      -       +      +
    212E  SER*     4.7     1.3    -      -       -      -
    214E  THR*     3.1    22.7    -      -       -      +
    215E  ALA*     4.0    21.1    -      -       +      +
    223E  ALA      2.8    14.5    +      -       -      +
    224E  ASN*     3.4    11.7    -      -       -      +
    226E  THR*     1.3    75.0    -      -       -      +
    228E  VAL*     1.3    52.7    +      -       +      +
    230E  SER*     4.2     1.2    -      -       -      -
    231E  THR*     2.7    37.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 228 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    212E  SER*     3.8    24.2    -      -       -      +
    215E  ALA*     4.3     9.6    -      -       +      -
    224E  ASN      2.8    21.0    +      -       -      +
    225E  VAL*     4.2     2.0    -      -       -      +
    227E  LEU*     1.3    73.6    -      -       -      +
    229E  VAL*     1.3    62.4    +      -       +      +
    231E  THR*     2.8    17.6    +      -       -      -
    232E  LEU*     3.1    13.0    +      -       +      +
    266E  TYR*     3.8    20.5    -      -       +      +
    269E  ALA*     4.3    16.4    -      -       +      -
    270E  VAL*     3.3    35.7    -      -       +      +
    273E  VAL*     4.6     9.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 229 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    211D  ILE*     4.4    20.2    -      -       +      -
    226D  THR*     4.9     1.3    -      -       +      +
    227D  LEU*     4.5     7.6    -      -       +      +
    230D  SER*     3.2    36.6    -      -       -      +
    231D  THR*     4.3    15.0    -      -       +      +
    234D  ALA*     6.4     0.4    -      -       +      -
    225E  VAL*     2.8    40.9    +      -       +      +
    226E  THR*     4.5     1.1    -      -       -      +
    228E  VAL*     1.3    74.3    -      -       +      +
    230E  SER*     1.3    57.9    +      -       -      +
    232E  LEU*     3.2    13.5    +      -       +      +
    233E  ILE*     3.0    27.8    +      -       +      +
    270E  VAL*     4.8     9.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 230 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    229A  VAL*     3.2    26.6    -      -       -      +
    233A  ILE*     3.6    14.4    -      -       -      +
    226D  THR*     6.0     0.7    -      -       -      +
    226E  THR*     2.7    37.4    +      -       -      +
    229E  VAL*     1.3    74.0    -      -       -      +
    231E  THR*     1.3    62.0    +      -       -      +
    233E  ILE*     3.1    13.9    +      -       -      +
    234E  ALA*     2.9    24.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 231 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    229A  VAL*     4.4    11.2    -      -       +      -
    232A  LEU*     5.6     2.9    -      -       +      -
    208E  ILE*     3.4    30.8    -      -       +      +
    211E  ILE*     3.6    26.2    -      -       +      -
    212E  SER*     3.6     6.2    -      -       -      +
    227E  LEU      2.7    23.8    +      -       -      +
    228E  VAL*     2.8    16.3    +      -       -      -
    230E  SER*     1.3    78.4    -      -       -      +
    232E  LEU*     1.3    54.5    +      -       -      +
    234E  ALA*     3.4     9.6    +      -       +      +
    235E  HIS*     2.9    27.7    +      -       -      +
    266E  TYR*     3.4    12.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 232 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    208D  ILE*     4.1    16.6    -      -       +      -
    211D  ILE*     3.8    30.7    -      -       +      -
    231D  THR*     5.5     3.1    -      -       +      -
    234D  ALA*     5.4     4.7    -      -       +      -
    228E  VAL*     3.1    17.4    +      -       +      +
    229E  VAL*     3.3    18.2    -      -       +      +
    230E  SER      3.2     0.2    -      -       -      -
    231E  THR*     1.3    71.7    +      -       -      +
    233E  ILE*     1.3    62.0    +      -       -      +
    235E  HIS*     3.4     6.3    +      -       +      +
    236E  ILE*     2.9    42.2    +      -       +      +
    263E  TYR*     4.6    18.4    -      -       +      +
    266E  TYR*     3.4    33.4    -      -       +      -
    270E  VAL*     6.1     0.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 233 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    233A  ILE*     3.6    22.2    -      -       +      -
    402A  LMT      4.1    20.4    -      -       +      -
    403A  LMT      5.8     2.7    -      -       +      -
    230D  SER*     3.5    32.5    -      -       -      +
    233D  ILE*     3.7    19.5    -      -       +      -
    234D  ALA*     4.1    19.7    -      -       +      +
    403D  LMT      4.8     8.9    -      -       +      +
    229E  VAL*     3.0    15.8    +      -       +      +
    230E  SER*     3.1    11.0    +      -       -      +
    232E  LEU*     1.3    74.0    -      -       +      +
    234E  ALA*     1.3    67.2    +      -       -      +
    236E  ILE*     2.9    19.6    +      -       -      +
    237E  ALA*     3.0    10.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 234 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    229A  VAL*     6.3     0.7    -      -       +      -
    232A  LEU*     5.3     4.9    -      -       +      -
    233A  ILE*     4.1    13.2    -      -       +      -
    236A  ILE*     3.7    25.1    -      -       +      -
    403A  LMT      5.5     0.9    -      -       -      -
    208E  ILE*     4.0    12.3    -      -       +      -
    230E  SER      2.9    12.6    +      -       -      +
    231E  THR*     3.5    13.2    -      -       -      +
    233E  ILE*     1.3    77.9    -      -       -      +
    235E  HIS*     1.3    61.1    +      -       -      +
    237E  ALA*     3.1    22.5    -      -       -      +
    238E  PHE*     3.4    12.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with HIS 235 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    205E  MET*     3.8    37.8    +      -       +      +
    208E  ILE*     3.2    22.6    -      -       +      +
    231E  THR      2.9    14.0    +      -       -      +
    232E  LEU*     3.6     9.0    -      -       +      +
    233E  ILE      3.2     0.2    -      -       -      -
    234E  ALA*     1.3    71.9    -      -       -      +
    236E  ILE*     1.3    65.7    +      -       -      +
    238E  PHE*     3.1     8.8    +      -       -      +
    239E  ASN*     3.0    18.2    +      -       +      +
    259E  ILE*     3.9     8.3    +      -       +      +
    262E  ILE*     3.1    36.9    -      -       +      +
    263E  TYR*     3.4    40.6    -      +       -      -
    266E  TYR*     3.8    13.6    -      +       +      +
----------------------------------------------------------
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Residues in contact with ILE 236 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    208D  ILE*     4.1    15.5    -      -       +      -
    234D  ALA*     3.5    31.4    -      -       +      -
    237D  ALA*     3.7    21.5    -      -       +      -
    238D  PHE*     3.5    30.1    -      -       +      -
    403D  LMT      4.0     9.6    -      -       +      +
    232E  LEU*     2.9    23.1    +      -       +      +
    233E  ILE*     2.9    10.1    +      -       -      +
    235E  HIS*     1.3    76.5    -      -       -      +
    237E  ALA*     1.3    60.9    +      -       -      +
    239E  ASN*     3.1    11.1    +      -       -      +
    240E  ILE*     3.2    15.4    +      -       +      +
    263E  TYR*     3.5    26.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 237 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    236A  ILE*     3.7    14.6    -      -       +      -
    240A  ILE*     3.3    16.4    -      -       +      +
    403A  LMT      3.1    36.6    -      -       +      -
    403D  LMT      3.3    27.1    -      -       -      +
    233E  ILE      3.0     6.9    +      -       -      +
    234E  ALA      3.1    17.9    -      -       -      +
    236E  ILE*     1.3    76.2    -      -       -      +
    238E  PHE*     1.3    55.8    +      -       +      +
    241E  LEU      3.4     9.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 238 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    236A  ILE*     3.5    35.2    -      -       +      -
    239A  ASN*     4.4     3.8    -      -       -      -
    240A  ILE*     4.4     7.9    -      -       +      -
    263A  TYR*     3.5    30.1    -      +       -      -
    200E  ASN      3.9    15.5    -      -       -      -
    201E  ILE*     4.3    17.8    -      -       +      +
    204E  PRO*     3.8    20.4    -      -       +      -
    205E  MET*     3.3    34.6    -      -       +      +
    208E  ILE*     5.5     4.5    -      -       +      -
    234E  ALA      3.4    13.5    -      -       -      -
    235E  HIS*     3.1     8.3    +      -       -      +
    237E  ALA*     1.3    79.1    -      -       +      +
    239E  ASN*     1.3    63.2    +      -       -      +
    241E  LEU*     4.0    19.0    -      -       +      +
    242E  VAL*     3.5    21.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 239 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    199D  PRO      5.4     2.4    +      -       -      -
    200D  ASN*     4.5    14.1    +      -       -      +
    204D  PRO*     4.8     3.6    -      -       -      +
    238D  PHE*     4.3     9.9    -      -       -      -
    205E  MET*     4.5     0.6    -      -       -      +
    235E  HIS*     3.0    10.6    +      -       +      +
    236E  ILE      3.1     4.0    +      -       -      +
    238E  PHE*     1.3    75.8    -      -       -      +
    240E  ILE*     1.3    63.0    +      -       +      +
    242E  VAL*     3.3     2.1    +      -       -      +
    243E  GLU*     3.0    40.4    +      -       -      +
    259E  ILE*     3.7    28.5    -      -       +      +
    263E  TYR*     2.7    44.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 240 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    237D  ALA*     3.2    40.6    -      -       +      +
    238D  PHE*     4.2    17.3    -      -       +      -
    241D  LEU*     3.6    35.2    -      -       +      -
    402D  LMT      3.6    30.3    -      -       +      -
    403D  LMT      4.1    20.4    -      -       +      +
    236E  ILE*     3.2    12.6    +      -       +      +
    239E  ASN*     1.3    76.6    -      -       +      +
    241E  LEU*     1.4    54.2    +      -       -      +
    243E  GLU*     4.2     7.2    -      -       -      +
    244E  THR*     2.5    34.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 241 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    240A  ILE*     3.4    36.1    -      -       +      -
    243A  GLU*     3.6    31.0    -      -       -      +
    244A  THR*     4.8    13.5    -      -       +      -
    403D  LMT      3.9    18.7    -      -       +      +
    201E  ILE*     4.8    17.9    -      -       +      -
    237E  ALA      3.4    18.6    +      -       -      +
    238E  PHE*     4.3    14.8    -      -       +      +
    239E  ASN      3.3     1.2    -      -       -      -
    240E  ILE*     1.4    78.1    -      -       -      +
    242E  VAL*     1.4    51.7    -      -       -      +
    244E  THR*     4.2     2.3    +      -       -      -
    245E  ASN*     2.7    40.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 242 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    119E  TYR*     5.1     6.5    -      -       +      -
    201E  ILE*     3.7    43.1    -      -       +      -
    238E  PHE      3.5    15.2    +      -       -      +
    239E  ASN*     3.3     3.6    +      -       -      +
    241E  LEU*     1.4    73.6    -      -       +      +
    243E  GLU*     1.3    69.4    +      -       +      +
    244E  THR      3.2     3.7    +      -       -      -
    245E  ASN*     3.5    24.8    +      -       -      +
    246E  LEU*     3.9    17.9    +      -       +      +
    255E  THR*     4.1    18.6    -      -       +      -
    256E  GLY*     5.8     2.7    -      -       -      +
    259E  ILE*     3.6    24.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 243 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    200D  ASN*     3.8    43.1    -      -       -      +
    201D  ILE*     4.7     5.6    -      -       -      +
    238D  PHE*     5.5     0.5    -      -       -      -
    241D  LEU*     3.2    37.1    -      -       -      +
    239E  ASN*     3.0    40.1    +      -       -      +
    240E  ILE*     4.2     5.7    -      -       -      +
    241E  LEU      3.7     0.2    -      -       -      -
    242E  VAL*     1.3    80.5    -      -       +      +
    244E  THR*     1.3    59.3    +      -       -      +
    246E  LEU*     3.5    20.7    -      -       -      +
    247E  PRO      5.5     0.9    -      -       -      +
    248E  LYS*     5.6     8.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 244 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    241D  LEU*     4.5    20.6    -      -       +      -
    245D  ASN*     6.0     0.9    -      -       -      +
    402D  LMT      5.6     7.8    -      -       +      +
     33E  LYS*     3.3    34.2    -      -       -      +
    240E  ILE*     2.5    29.0    +      -       +      +
    241E  LEU*     4.2     3.9    +      -       -      -
    242E  VAL      3.2     0.4    -      -       -      -
    243E  GLU*     1.3    82.4    -      -       -      +
    245E  ASN*     1.3    62.5    +      -       -      +
    246E  LEU      3.2     3.4    -      -       -      -
----------------------------------------------------------
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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