Contacts of the helix formed by residues 225 - 250 (chain L) in PDB entry 1JH0


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 GLY 225 (chain L).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    173H  GLU*     5.3     3.6    -      -       -      -
    213L  ASP*     3.9    10.1    -      -       -      -
    223L  SER*     3.2     7.3    +      -       -      -
    224L  ILE*     1.3    81.7    -      -       -      +
    226L  THR*     1.3    56.7    +      -       -      -
    227L  LEU      3.1     3.4    -      -       -      -
    228L  GLY      2.7    22.7    +      -       -      -
    229L  ILE*     2.8    16.6    +      -       -      +
     44M  ASN*     3.4    15.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with THR 226 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    173H  GLU*     3.3    30.7    +      -       +      +
    177H  ARG*     5.0     0.2    +      -       -      -
    190L  HIS*     6.2     1.1    -      -       -      -
    209L  PRO*     4.5     9.6    -      -       +      +
    212L  GLU*     4.3    21.1    -      -       +      +
    213L  ASP*     4.8     6.0    +      -       -      +
    225L  GLY*     1.3    70.8    -      -       -      -
    227L  LEU*     1.3    59.6    +      -       -      +
    229L  ILE*     3.8     8.7    -      -       -      +
    230L  HIS*     2.9    31.6    +      -       -      -
    232M  GLU*     3.1    34.5    +      -       -      +
    233M  ARG*     4.9     1.0    -      -       -      -
    234M  GLU*     6.1     0.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 227 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    173H  GLU*     4.7     2.7    +      -       -      +
    175H  MET*     4.1    28.7    -      -       +      -
    194H  GLN*     6.0     0.2    -      -       -      +
    225L  GLY      3.1     0.6    -      -       -      -
    226L  THR*     1.3    80.7    +      -       -      +
    228L  GLY*     1.3    60.8    +      -       -      +
    230L  HIS*     3.9     3.0    +      -       -      +
    231L  ARG*     3.1    59.0    +      -       -      +
      5M  ASN*     3.4    24.5    -      -       -      +
      8M  SER*     5.3     1.1    -      -       -      +
     42M  PHE      5.1     0.2    -      -       -      -
    223M  ILE*     5.3     0.9    -      -       +      -
    224M  LEU*     4.1    12.8    -      -       +      -
    227M  SER*     4.6     2.0    -      -       -      -
    232M  GLU*     3.3    39.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 228 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    224L  ILE*     3.6    25.1    +      -       -      +
    225L  GLY*     2.7     9.1    +      -       -      -
    227L  LEU*     1.3    78.4    -      -       -      +
    229L  ILE*     1.3    57.7    +      -       -      -
    230L  HIS      3.1     1.8    -      -       -      -
    231L  ARG*     3.0     5.5    +      -       -      +
    232L  LEU*     2.8    28.9    +      -       -      +
     42M  PHE*     3.9    19.0    +      -       -      -
     43M  GLY*     5.1     0.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 229 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    186L  ALA*     5.0    10.1    -      -       +      +
    189L  LEU*     6.1     2.5    -      -       +      -
    190L  HIS*     3.5    42.0    -      -       +      +
    224L  ILE*     3.6    23.1    -      -       +      +
    225L  GLY      2.8    12.9    +      -       -      +
    226L  THR*     3.8    10.3    -      -       -      +
    228L  GLY*     1.3    71.9    -      -       -      +
    230L  HIS*     1.3    83.2    +      -       +      +
    232L  LEU*     3.6    18.2    -      -       +      +
    233L  GLY*     2.8    24.4    +      -       -      -
    216M  PHE*     3.8     8.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with HIS 230 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    190L  HIS*     3.1    19.5    -      +       -      -
    226L  THR*     2.9    26.2    +      -       -      +
    227L  LEU*     3.9     4.9    +      -       -      +
    228L  GLY      3.1     0.8    -      -       -      -
    229L  ILE*     1.3    87.2    -      -       +      +
    231L  ARG*     1.3    66.2    +      -       -      +
    233L  GLY      3.9     0.7    -      -       -      +
    234L  LEU*     3.3    21.1    +      -       -      +
    216M  PHE*     4.8     3.1    -      +       -      -
    219M  HIS*     2.9    17.9    +      +       -      -
    220M  GLY*     3.7    13.6    -      -       -      -
    223M  ILE*     3.2    43.2    -      -       +      +
    224M  LEU*     4.3     7.7    -      -       +      +
    232M  GLU      5.2     2.2    -      -       -      -
    234M  GLU*     2.8    18.2    +      -       +      -
    856M   FE      2.4    31.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 231 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    227L  LEU*     3.1    51.4    +      -       -      +
    228L  GLY      3.0     6.8    +      -       -      +
    230L  HIS*     1.3    75.5    -      -       -      +
    232L  LEU*     1.3    60.9    +      -       -      +
    234L  LEU*     3.3     4.6    +      -       -      +
    235L  LEU*     2.9    31.4    +      -       -      +
      3M  TYR*     4.0     1.4    +      -       -      -
      5M  ASN*     2.9    35.6    +      -       -      +
      6M  ILE*     3.1    25.2    +      -       +      +
      8M  SER*     3.7    22.0    +      -       -      +
     41M  TRP      3.3    19.8    +      -       -      -
     42M  PHE*     2.9    44.1    +      -       +      -
    224M  LEU*     4.0    20.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 232 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    186L  ALA*     5.2     4.5    -      -       +      -
    224L  ILE*     5.1    11.7    -      -       +      -
    228L  GLY      2.8    16.2    +      -       -      +
    229L  ILE*     3.6    24.2    -      -       +      +
    231L  ARG*     1.3    74.8    -      -       -      +
    233L  GLY*     1.3    58.6    +      -       -      +
    235L  LEU*     2.9     6.7    +      -       +      +
    236L  LEU*     2.7    63.3    +      -       +      +
     42M  PHE*     4.0    23.3    -      -       +      -
    216M  PHE*     6.4     0.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 233 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    183L  ASN*     3.5     3.4    -      -       -      +
    229L  ILE      2.8    11.7    +      -       -      -
    230L  HIS      4.3     0.2    -      -       -      -
    231L  ARG      3.3     0.2    -      -       -      -
    232L  LEU*     1.3    77.9    -      -       -      +
    234L  LEU*     1.3    62.8    +      -       -      +
    235L  LEU      3.2     0.2    +      -       -      -
    236L  LEU*     4.6     2.5    -      -       -      -
    237L  SER*     3.2    25.1    +      -       -      -
    216M  PHE*     3.5    45.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 234 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    116L  HIS*     4.9     7.0    -      -       +      +
    119L  PHE*     6.1     4.0    -      -       +      -
    120L  ALA*     4.0    18.2    -      -       +      -
    230L  HIS      3.3    18.2    +      -       -      +
    231L  ARG      3.3     5.7    +      -       -      +
    232L  LEU      3.2     0.2    -      -       -      -
    233L  GLY*     1.3    75.7    -      -       -      +
    235L  LEU*     1.3    62.4    +      -       +      +
    237L  SER*     3.7     1.2    -      -       -      -
    238L  LEU*     3.1    60.3    +      -       +      +
      6M  ILE*     4.4    13.0    -      -       +      -
    216M  PHE      4.7     4.9    -      -       -      -
    217M  ALA*     4.0    15.7    -      -       -      +
    220M  GLY*     4.6     1.8    -      -       -      -
    221M  ALA*     4.1    18.4    -      -       +      +
    224M  LEU*     3.6    25.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 235 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    179L  PHE*     5.8     0.4    -      -       -      -
    231L  ARG      2.9    17.8    +      -       -      +
    232L  LEU*     2.9    10.8    +      -       +      +
    234L  LEU*     1.3    83.7    -      -       +      +
    236L  LEU*     1.3    64.7    +      -       -      +
    237L  SER      3.1     1.6    -      -       -      -
    238L  LEU*     4.6     6.7    -      -       +      +
    239L  SER*     3.1    34.8    +      -       -      +
      6M  ILE*     4.6    20.4    -      -       +      -
      7M  PHE*     5.9     4.7    -      -       +      -
     42M  PHE*     3.8    23.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 236 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    179L  PHE*     3.8    31.1    -      -       +      +
    182L  THR*     3.3    36.1    -      -       +      -
    183L  ASN*     3.4    22.2    -      -       +      +
    186L  ALA*     3.8    25.6    -      -       +      -
    232L  LEU*     2.7    48.7    +      -       +      +
    233L  GLY*     4.9     0.9    -      -       -      -
    235L  LEU*     1.3    73.2    -      -       -      +
    237L  SER*     1.3    66.8    +      -       -      +
    239L  SER*     3.7     1.2    -      -       -      -
    240L  ALA*     3.0    21.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 237 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    183L  ASN*     2.8    22.7    +      -       -      -
    233L  GLY      3.2    12.2    +      -       -      -
    234L  LEU      3.7     4.5    -      -       -      -
    235L  LEU      3.1     0.6    -      -       -      -
    236L  LEU*     1.3    73.2    -      -       -      +
    238L  LEU*     1.3    59.5    +      -       -      -
    239L  SER      2.6    14.9    +      -       -      -
    240L  ALA*     2.7    19.7    +      -       -      +
    241L  VAL*     3.2     8.0    +      -       -      +
    855L  BPH      4.1     6.1    -      -       -      -
    213M  ALA*     3.2    28.7    +      -       -      +
    216M  PHE*     3.8     1.0    -      -       -      +
    217M  ALA*     3.4    21.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 238 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    119L  PHE*     4.7    13.9    -      -       +      -
    120L  ALA*     3.6    37.0    -      -       +      +
    123L  PHE*     3.6    36.6    -      -       +      -
    234L  LEU*     3.1    37.1    +      -       +      +
    235L  LEU*     4.6     7.2    -      -       +      +
    237L  SER*     1.3    78.3    -      -       -      +
    239L  SER*     1.3    55.1    +      -       -      +
    241L  VAL*     3.3     1.6    +      -       -      +
    242L  PHE*     2.8    28.5    +      -       -      +
    855L  BPH      3.4    28.5    -      -       +      -
    217M  ALA*     4.7     2.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 239 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    179L  PHE*     4.0    31.1    -      -       -      -
    235L  LEU*     3.1    26.7    +      -       -      +
    236L  LEU      3.7     3.1    -      -       -      -
    237L  SER      2.6     5.7    +      -       -      -
    238L  LEU*     1.3    70.1    -      -       -      +
    240L  ALA*     1.3    67.0    +      -       -      -
    241L  VAL      3.0     1.6    -      -       -      -
    242L  PHE*     2.8    20.2    +      -       -      +
    243L  PHE*     2.8    20.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 240 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    176L  ALA*     3.7     7.1    -      -       -      +
    179L  PHE*     3.4    29.3    -      -       +      +
    180L  PHE*     3.5    38.7    -      -       +      +
    183L  ASN*     5.6     0.7    -      -       +      -
    236L  LEU      3.0     8.6    +      -       -      +
    237L  SER*     2.7    16.0    +      -       -      +
    239L  SER*     1.3    71.3    -      -       -      +
    241L  VAL*     1.3    52.1    +      -       +      +
    244L  SER*     2.6    33.8    +      -       -      -
    213M  ALA*     5.7     0.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 241 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    123L  PHE*     3.2    33.0    -      -       +      +
    124L  ALA*     4.5     0.7    -      -       -      +
    126L  LEU*     6.5     0.2    -      -       +      -
    127L  ALA*     3.9    18.4    -      -       +      -
    180L  PHE*     4.6     7.0    -      -       +      -
    237L  SER      3.2     3.9    +      -       -      +
    238L  LEU*     3.7     6.3    -      -       -      +
    239L  SER      3.0     0.6    -      -       -      -
    240L  ALA*     1.3    78.4    -      -       -      +
    242L  PHE*     1.3    66.8    +      -       -      +
    244L  SER*     3.0     5.8    +      -       -      -
    245L  ALA*     2.9    23.5    +      -       +      +
    851L  BCL      4.5    11.7    -      -       -      -
    855L  BPH      3.5    48.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 242 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    123L  PHE*     4.6    19.7    -      +       +      -
    126L  LEU*     5.3    13.7    -      -       +      -
    238L  LEU      2.8    14.8    +      -       -      +
    239L  SER*     2.8    13.1    +      -       -      +
    241L  VAL*     1.3    78.3    -      -       -      +
    243L  PHE*     1.3    87.0    +      +       -      +
    245L  ALA*     3.3     5.9    +      -       +      +
    246L  LEU*     3.0    42.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 243 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    172L  ALA*     3.6     9.3    -      -       +      +
    175L  ILE*     3.3    28.3    -      -       +      -
    176L  ALA*     3.7    23.3    -      -       +      +
    179L  PHE*     3.5    33.4    -      +       -      -
    239L  SER*     2.8    19.4    +      -       -      +
    242L  PHE*     1.3    95.2    -      +       -      +
    244L  SER*     1.3    57.3    +      -       -      +
    246L  LEU*     3.5    23.3    -      -       +      +
    247L  CYS*     2.8    30.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 244 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    176L  ALA*     3.4     5.3    -      -       -      +
    180L  PHE*     3.5     3.6    -      -       -      -
    240L  ALA      2.6    24.1    +      -       -      -
    241L  VAL*     3.0     9.0    +      -       -      -
    243L  PHE*     1.3    73.5    -      -       -      +
    245L  ALA*     1.3    66.5    +      -       -      +
    247L  CYS*     3.3    14.9    +      -       -      -
    248L  MET      3.4     1.6    +      -       -      -
    851L  BCL      2.8    73.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 245 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    126L  LEU*     5.1    10.3    -      -       +      -
    127L  ALA*     4.3    16.4    -      -       -      +
    130L  THR*     3.7    27.1    -      -       -      +
    241L  VAL*     2.9    16.1    +      -       +      +
    242L  PHE*     3.7     6.1    -      -       +      +
    244L  SER*     1.3    74.6    -      -       -      +
    246L  LEU*     1.3    63.2    +      -       -      +
    248L  MET*     3.3     1.9    +      -       -      -
    249L  ILE*     3.1    24.0    +      -       -      +
    851L  BCL      3.6    12.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 246 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    172L  ALA*     4.4    15.3    -      -       +      -
    242L  PHE*     3.0    35.7    +      -       +      +
    243L  PHE*     3.5    22.0    -      -       +      +
    244L  SER      3.2     0.2    -      -       -      -
    245L  ALA*     1.3    73.9    -      -       -      +
    247L  CYS*     1.3    57.9    +      -       -      +
    248L  MET      2.9    10.6    +      -       -      -
    249L  ILE*     3.2    25.3    +      -       +      +
    250L  ILE*     3.3    23.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with CYS 247 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    167L  PHE*     4.4     0.9    -      -       -      -
    170L  ASN*     2.8    32.3    +      -       -      +
    172L  ALA*     3.4    28.4    -      -       +      +
    173L  HIS*     3.4    32.5    -      -       -      +
    176L  ALA*     5.8     0.2    -      -       -      -
    243L  PHE      2.8    16.5    +      -       -      +
    244L  SER*     3.3    12.5    +      -       -      -
    246L  LEU*     1.3    71.0    -      -       -      +
    248L  MET*     1.3    70.1    +      -       -      +
    250L  ILE*     3.8     5.6    -      -       -      +
    251L  THR*     3.1     9.5    +      -       -      -
    851L  BCL      3.4    14.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with MET 248 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    130L  THR*     4.6     2.2    -      -       +      -
    131L  LEU*     4.1    16.4    -      -       +      -
    135L  ARG*     3.3    35.4    -      -       -      +
    156L  TRP*     4.0    15.7    -      -       +      -
    160L  THR*     4.2    10.8    -      -       +      -
    167L  PHE*     3.6    33.2    -      -       -      -
    244L  SER      4.0     0.2    -      -       -      +
    245L  ALA      3.3     7.3    +      -       -      +
    246L  LEU      3.0     0.6    -      -       -      -
    247L  CYS*     1.3    79.1    -      -       -      +
    249L  ILE*     1.3    64.8    +      -       -      +
    250L  ILE      3.2     2.0    -      -       -      -
    251L  THR*     3.2    14.5    +      -       +      +
    851L  BCL      3.1    66.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 249 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    130L  THR*     4.4    16.1    -      -       +      +
    134L  PHE*     4.4    23.8    -      -       +      -
    135L  ARG*     5.0     7.7    -      -       -      +
    138L  MET*     4.2    23.6    -      -       +      +
    245L  ALA      3.1    13.2    +      -       -      +
    246L  LEU*     3.2    27.3    +      -       +      +
    248L  MET*     1.3    78.2    -      -       -      +
    250L  ILE*     1.3    62.8    +      -       +      +
    251L  THR      3.6     0.2    +      -       -      -
    253L  THR*     2.5    34.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 250 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    170L  ASN*     4.2     9.2    -      -       -      +
    171L  PRO*     5.3     4.5    -      -       +      -
    172L  ALA*     4.6    10.8    -      -       +      -
    246L  LEU*     3.5    29.4    -      -       +      +
    247L  CYS      3.8     7.2    -      -       -      +
    249L  ILE*     1.3    88.1    -      -       +      +
    251L  THR*     1.3    61.2    +      -       -      +
    252L  GLY      3.4     0.3    +      -       -      -
    253L  THR*     3.5     5.6    -      -       -      -
    254L  ILE*     3.5    32.2    +      -       +      +
    255L  TRP*     3.4    27.2    +      -       -      +
    259L  TRP*     3.5    29.2    -      -       +      -
----------------------------------------------------------
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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