Contacts of the helix formed by residues 218 - 240 (chain B) in PDB entry 5M8N


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 PRO 218 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    217B  GLY*     1.3    82.5    -      -       -      +
    219B  ALA*     1.3    60.6    +      -       -      +
    220B  PHE      3.2     0.5    +      -       -      -
    221B  LEU      3.7     7.3    +      -       -      -
    222B  THR*     4.1     1.4    +      -       -      -
    342B  PHE*     3.7    17.5    -      -       +      -
    343B  ASP*     3.3    24.7    -      -       -      +
    347B  PHE*     3.8    16.6    -      -       +      +
    356B  ARG*     3.9     5.9    -      -       +      +
    425B  PHE*     3.6    32.2    -      -       +      -
    426B  PRO*     3.7    25.8    -      -       +      -
    430B  ALA*     4.5     0.2    -      -       +      -
    434B  HIS*     3.7    27.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 219 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    213B  PHE      4.1     9.0    -      -       -      +
    214B  SER      4.6     0.2    -      -       -      -
    218B  PRO*     1.3    76.7    -      -       -      +
    220B  PHE*     1.3    58.7    +      -       -      +
    221B  LEU      3.2     0.2    -      -       -      -
    222B  THR*     2.8    11.8    +      -       -      -
    223B  TRP*     2.7    37.7    +      -       +      +
    425B  PHE*     3.8     3.2    -      -       -      -
    433B  GLY      3.9    11.7    -      -       -      +
    434B  HIS*     3.0    29.9    +      -       +      +
    440B  MET*     5.5     0.7    -      -       +      -
    449B  ASN*     3.1    20.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 220 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    214B  SER      3.2    27.9    +      -       -      +
    215B  HIS*     3.9     7.2    -      +       -      -
    217B  GLY      3.1    19.0    +      -       -      +
    219B  ALA*     1.3    76.3    -      -       -      +
    221B  LEU*     1.3    87.9    +      -       +      +
    224B  HIS*     2.8    47.2    +      +       +      +
    356B  ARG*     4.1     5.2    -      -       -      -
    360B  GLU*     3.5    48.9    -      -       +      +
    377B  HIS*     3.3    50.3    -      +       +      -
    404B  HIS*     4.2     5.2    -      +       -      -
    407B  THR*     4.4     5.2    -      -       +      -
    434B  HIS*     4.0     1.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 221 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    218B  PRO      3.7     2.2    +      -       -      -
    219B  ALA      2.9     1.4    +      -       -      -
    220B  PHE*     1.3   104.3    -      -       +      +
    222B  THR*     1.3    61.2    +      -       -      +
    224B  HIS*     4.0     2.6    -      -       +      +
    225B  ARG*     3.0    28.8    +      -       -      +
    342B  PHE*     3.5    25.6    -      -       +      -
    355B  PHE*     3.7    16.4    -      -       +      -
    356B  ARG*     4.4     7.9    -      -       +      -
    359B  VAL*     4.1    12.8    -      -       +      -
    407B  THR*     4.0    17.7    -      -       +      +
    408B  ASP*     4.8     1.0    -      -       -      +
    411B  PHE*     3.5    54.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 222 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    218B  PRO      4.4     0.9    +      -       -      +
    219B  ALA*     2.8    17.5    +      -       -      -
    221B  LEU*     1.3    71.8    -      -       +      +
    223B  TRP*     1.3    62.6    +      -       -      -
    225B  ARG*     3.2     3.6    +      -       -      +
    226B  TYR      3.1    19.4    +      -       -      -
    342B  PHE*     5.6     0.4    -      -       +      -
    411B  PHE*     4.3    15.9    -      -       +      -
    425B  PHE*     4.1    16.6    -      -       +      -
    440B  MET*     3.6     5.9    -      -       -      +
    449B  ASN*     2.7    50.6    +      -       -      +
    452B  MET*     3.5    29.3    -      -       +      +
    453B  PHE*     4.4     4.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with TRP 223 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    191B  THR      3.6    10.8    -      -       -      -
    192B  HIS*     3.3    42.0    -      +       -      -
    195B  SER*     3.5    19.2    -      -       -      -
    213B  PHE      3.8    11.0    -      -       -      +
    214B  SER*     3.3    30.7    -      -       -      -
    219B  ALA*     2.7    22.6    +      -       +      +
    220B  PHE      4.2     1.6    -      -       -      +
    222B  THR*     1.3    74.5    +      -       -      +
    224B  HIS*     1.3    68.9    +      +       -      +
    226B  TYR      3.5     0.3    +      -       -      -
    227B  HIS*     2.9    53.3    +      +       +      -
    440B  MET*     3.6    29.1    -      -       +      -
    441B  VAL      2.5    30.3    +      -       -      -
    442B  PRO*     4.5     0.4    -      -       +      -
    443B  PHE*     3.6    17.8    -      +       -      -
----------------------------------------------------------
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Residues in contact with HIS 224 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    192B  HIS*     3.3     2.6    +      -       -      -
    214B  SER      3.2    16.2    +      -       -      -
    215B  HIS*     3.1    16.4    -      +       -      -
    220B  PHE*     2.8    34.3    +      +       +      +
    221B  LEU*     4.3     2.7    -      -       +      +
    223B  TRP*     1.3    94.5    -      +       -      +
    225B  ARG*     1.3    65.0    +      -       -      +
    227B  HIS*     3.3     4.8    -      -       -      +
    228B  LEU*     3.1    30.1    +      -       +      +
    400B  PHE*     3.9    11.7    -      +       -      -
    404B  HIS*     3.1    37.1    -      +       -      +
    407B  THR*     6.5     0.2    -      -       +      -
    408B  ASP*     6.1     0.2    -      -       -      -
    513B   ZN      1.9    37.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 225 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    130B  ARG*     5.3     0.3    +      -       -      -
    221B  LEU      3.0    19.5    +      -       -      +
    222B  THR*     3.4     6.5    -      -       -      +
    224B  HIS*     1.3    77.4    -      -       -      +
    226B  TYR*     1.3    56.4    +      -       -      +
    228B  LEU*     3.4     6.6    +      -       -      +
    229B  LEU*     3.0    24.8    +      -       +      +
    408B  ASP*     2.7    37.6    +      -       -      +
    411B  PHE*     3.5    15.1    -      -       -      -
    412B  ASP*     2.9    45.7    +      -       -      +
    415B  LEU*     3.8     1.8    -      -       -      +
    452B  MET*     3.2    40.7    +      -       +      -
    454B  VAL      2.8    27.3    +      -       -      -
    456B  ALA*     3.8     2.4    -      -       -      +
    460B  LEU*     3.5    12.7    -      -       -      +
    462B  TYR*     3.2    17.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 226 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    115B  PRO*     6.2     2.2    -      -       +      -
    222B  THR      3.1     7.5    +      -       -      +
    225B  ARG*     1.3    73.8    -      -       -      +
    227B  HIS*     1.3    66.3    +      -       -      +
    229B  LEU*     3.9    16.4    -      -       +      -
    230B  ARG*     2.9    45.4    +      -       +      +
    440B  MET*     3.7    15.5    -      -       +      -
    443B  PHE*     3.5    44.6    -      +       +      -
    444B  TRP      4.0    16.0    +      -       -      -
    445B  PRO*     4.7     5.0    +      -       -      +
    447B  VAL*     3.9    25.0    -      -       +      +
    452B  MET*     3.5    30.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with HIS 227 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    188B  PHE*     2.5    72.3    +      +       -      -
    191B  THR*     3.1    18.1    +      -       -      -
    192B  HIS*     3.9    14.5    -      +       +      +
    223B  TRP*     2.9    39.5    +      +       +      +
    224B  HIS*     3.3    12.4    -      -       -      +
    226B  TYR*     1.3    78.5    -      -       -      +
    228B  LEU*     1.3    61.9    +      -       -      +
    230B  ARG*     3.6     4.0    +      -       +      +
    231B  LEU*     3.2    19.6    +      -       -      +
    395B  PRO*     4.4     0.7    -      -       +      -
    400B  PHE*     3.7    17.4    -      +       -      -
    443B  PHE*     3.6    12.4    -      +       -      -
----------------------------------------------------------
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Residues in contact with LEU 228 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    130B  ARG*     4.2    10.5    -      -       -      +
    188B  PHE*     4.2    20.4    -      -       +      -
    224B  HIS      3.1    17.7    +      -       -      +
    225B  ARG      3.7     5.8    -      -       -      +
    227B  HIS*     1.3    76.1    -      -       +      +
    229B  LEU*     1.3    61.2    +      -       -      +
    231B  LEU*     3.2     2.5    +      -       -      +
    232B  GLU*     2.8    31.2    +      -       -      +
    246B  LEU*     3.6    23.9    -      -       +      +
    401B  VAL*     3.9    22.7    -      -       +      +
    404B  HIS*     3.3    42.2    -      -       +      +
    405B  THR*     3.6     8.3    -      -       +      +
    408B  ASP*     4.2    10.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 229 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    115B  PRO*     4.2    26.2    -      -       +      -
    130B  ARG*     3.7    11.2    -      -       -      +
    225B  ARG      3.0    13.6    +      -       -      +
    226B  TYR*     3.1    18.8    +      -       +      +
    228B  LEU*     1.3    75.4    -      -       -      +
    230B  ARG*     1.3    58.7    +      -       -      +
    232B  GLU*     3.3     9.0    +      -       -      +
    233B  LYS*     2.9    30.9    +      -       -      +
    452B  MET*     3.6    28.9    -      -       +      -
    460B  LEU*     4.3    14.1    -      -       +      +
    462B  TYR*     3.6    33.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 230 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    158B  LEU*     4.6     7.6    -      -       -      +
    159B  PHE*     3.7    35.5    -      -       -      -
    187B  TYR*     3.9    18.6    -      -       +      +
    188B  PHE*     6.4     0.7    -      -       +      -
    226B  TYR*     2.9    42.4    +      -       +      +
    227B  HIS*     3.9     4.7    -      -       +      +
    229B  LEU*     1.3    78.2    -      -       -      +
    231B  LEU*     1.3    60.2    +      -       -      +
    233B  LYS*     3.1    35.3    -      -       -      +
    234B  ASP*     2.9    62.3    +      -       -      +
    237B  GLU*     4.4     3.2    +      -       -      -
    443B  PHE*     5.1     6.5    -      -       +      -
    444B  TRP      4.4     7.3    +      -       -      -
    445B  PRO*     5.7     2.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 231 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    148B  LEU*     5.0     0.9    -      -       +      -
    151B  ALA*     5.2     0.2    -      -       +      -
    184B  ILE*     4.2    16.6    -      -       +      +
    185B  TYR*     4.3    17.9    -      -       +      -
    188B  PHE*     3.6    39.7    -      -       +      -
    227B  HIS      3.2     7.3    +      -       -      +
    228B  LEU      3.2     6.2    +      -       -      +
    230B  ARG*     1.3    75.6    -      -       -      +
    232B  GLU*     1.3    59.5    +      -       -      +
    234B  ASP*     3.2     7.3    +      -       -      +
    235B  MET*     2.9    56.5    +      -       +      +
    246B  LEU*     4.3    10.8    -      -       +      -
    401B  VAL*     3.8    38.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 232 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128B  ILE*     3.5    19.7    -      -       -      +
    130B  ARG*     2.7    43.7    +      -       -      -
    228B  LEU      2.8    16.1    +      -       -      +
    229B  LEU*     3.5    12.4    -      -       -      +
    231B  LEU*     1.3    76.7    -      -       -      +
    233B  LYS*     1.3    58.2    +      -       -      +
    235B  MET*     3.1     3.3    +      -       -      +
    236B  GLN*     2.8    48.9    +      -       -      +
    244B  PHE*     3.9     8.4    -      -       +      +
    245B  SER*     3.3     5.4    -      -       -      -
    246B  LEU*     2.9    38.1    +      -       +      +
    462B  TYR*     4.8     1.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 233 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    112B  THR*     2.5    46.4    +      -       -      +
    113B  CYS*     4.2     7.4    +      -       -      +
    118B  ARG*     5.6     5.9    -      -       -      +
    229B  LEU      2.9    17.5    +      -       -      +
    230B  ARG*     3.1    29.2    -      -       -      +
    232B  GLU*     1.3    72.0    -      -       -      +
    234B  ASP*     1.3    66.8    +      -       -      +
    236B  GLN*     3.2    21.4    +      -       +      +
    237B  GLU*     3.1    51.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 234 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    156B  HIS*     2.9    34.2    +      -       -      +
    157B  PRO*     6.0     0.6    -      -       +      +
    184B  ILE*     3.8    26.6    -      -       +      +
    187B  TYR*     4.2     4.0    -      -       -      -
    230B  ARG*     2.9    55.0    +      -       -      +
    231B  LEU*     3.6     5.6    -      -       -      +
    233B  LYS*     1.3    76.0    -      -       -      +
    235B  MET*     1.3    59.7    +      -       -      +
    237B  GLU*     3.4    11.5    +      -       -      +
    238B  MET*     3.0    27.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 235 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    144B  PHE*     4.9     1.6    -      -       +      -
    147B  ALA*     3.6    37.2    -      -       +      +
    148B  LEU*     3.7    22.0    -      -       +      +
    151B  ALA*     4.4    12.8    -      -       +      -
    184B  ILE*     4.5     2.5    -      -       +      -
    231B  LEU*     2.9    46.3    +      -       +      +
    232B  GLU      3.8     0.7    -      -       -      +
    233B  LYS      3.1     0.2    -      -       -      -
    234B  ASP*     1.3    74.8    -      -       -      +
    236B  GLN*     1.3    67.7    +      -       -      +
    238B  MET*     4.2     8.5    -      -       +      -
    239B  LEU*     3.0    31.6    +      -       +      +
    244B  PHE*     3.3    40.8    -      -       +      -
    246B  LEU*     4.2     5.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 236 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    118B  ARG*     4.0    17.9    +      -       -      +
    128B  ILE*     3.9    11.3    -      -       -      +
    232B  GLU*     2.8    31.2    +      -       -      +
    233B  LYS*     3.2    26.0    +      -       -      +
    235B  MET*     1.3    77.9    -      -       -      +
    237B  GLU*     1.3    58.6    +      -       +      +
    240B  GLN*     2.8    24.9    +      -       -      -
    241B  GLU      3.0    24.5    +      -       -      +
    242B  PRO*     3.1    24.8    +      -       -      +
    244B  PHE*     2.9    28.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 237 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    112B  THR*     5.0     2.9    +      -       -      -
    118B  ARG*     5.9     2.9    -      -       -      +
    156B  HIS*     6.1     0.3    -      -       -      -
    157B  PRO*     5.5     8.4    -      -       +      +
    230B  ARG*     4.4     2.4    +      -       -      -
    233B  LYS*     3.1    47.2    +      -       +      +
    234B  ASP*     3.9    17.5    -      -       -      +
    236B  GLN*     1.3    76.7    -      -       +      +
    238B  MET*     1.3    64.4    +      -       -      +
    240B  GLN*     3.2    22.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 238 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    147B  ALA*     3.5    23.8    -      -       -      +
    150B  MET*     3.9    29.9    -      -       +      +
    151B  ALA*     3.7    30.7    -      -       +      -
    154B  THR*     4.3    11.2    -      -       +      -
    184B  ILE*     3.9    21.3    -      -       +      -
    234B  ASP      3.0    17.9    +      -       -      +
    235B  MET*     3.9    11.4    -      -       +      +
    237B  GLU*     1.3    78.1    -      -       -      +
    239B  LEU*     1.3    84.0    +      -       +      +
    240B  GLN*     3.4     5.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 239 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    143B  HIS*     4.1    18.2    -      -       +      +
    147B  ALA*     3.9    13.2    -      -       +      -
    150B  MET*     4.2    20.9    -      -       +      -
    235B  MET*     3.0    19.5    +      -       +      +
    238B  MET*     1.3    89.6    -      -       +      +
    240B  GLN*     1.3    69.9    +      -       -      +
    241B  GLU*     3.1    20.9    +      -       +      +
    244B  PHE*     3.6    40.8    -      -       +      -
    203C  VAL*     3.8    13.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 240 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    236B  GLN      2.8     8.6    +      -       -      -
    237B  GLU*     3.2    17.0    +      -       -      +
    238B  MET      4.2     4.5    -      -       -      +
    239B  LEU*     1.3    78.7    -      -       -      +
    241B  GLU*     1.3    51.4    +      -       -      +
    242B  PRO*     3.8     4.0    -      -       -      -
     84C  ARG*     6.0     1.0    -      -       -      +
    165C  ARG*     2.9    28.6    +      -       -      -
    167C  GLU*     2.9    29.8    +      -       -      +
    168C  GLU*     4.8    11.8    -      -       -      +
    200C  PHE*     4.9     5.6    -      -       +      -
    202C  GLY*     3.2     8.1    -      -       -      -
    203C  VAL*     2.7    37.6    +      -       +      +
----------------------------------------------------------
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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