Contacts of the helix formed by residues 309 - 336 (chain B) in PDB entry 4WLU


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 309 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    210B  SER*     4.1    11.0    +      -       -      -
    223B  LEU*     5.9     1.0    -      -       -      +
    308B  VAL*     1.3    75.8    -      -       -      +
    310B  SER*     1.3    58.9    +      -       -      +
    311B  PHE*     3.4    11.1    +      -       -      +
    312B  GLU*     2.9    39.9    +      -       -      +
    313B  GLU*     2.8    28.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 310 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    309B  SER*     1.3    74.2    -      -       -      +
    311B  PHE*     1.3    63.3    +      -       -      +
    313B  GLU*     3.2     8.8    +      -       -      +
    314B  LYS*     3.0    24.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 311 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    220B  GLN*     3.5    29.2    -      -       -      +
    223B  LEU*     3.9    27.8    -      -       +      -
    224B  THR*     4.5    18.2    -      -       +      -
    227B  THR*     3.6    24.0    -      -       +      -
    309B  SER*     3.4    10.2    +      -       -      +
    310B  SER*     1.3    80.8    -      -       -      +
    312B  GLU*     1.3    64.3    +      -       +      +
    314B  LYS*     3.4     6.1    +      -       +      +
    315B  MET*     3.3    59.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 312 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    206B  ILE*     4.4     1.3    -      -       +      +
    207B  PRO      4.3     4.7    -      -       -      +
    208B  LEU*     3.9    23.0    -      -       +      +
    209B  ILE*     3.1     9.9    +      -       -      +
    210B  SER*     2.6    48.2    +      -       -      -
    223B  LEU*     6.1     1.4    -      -       -      +
    308B  VAL*     3.4    16.6    -      -       +      +
    309B  SER*     2.9    29.7    +      -       -      +
    311B  PHE*     1.3    77.5    -      -       +      +
    313B  GLU*     1.3    65.1    +      -       -      +
    315B  MET*     3.3    21.9    +      -       +      +
    316B  ILE*     3.1    29.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 313 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    308B  VAL*     4.1    15.9    -      -       +      +
    309B  SER      2.8    17.0    +      -       -      +
    310B  SER*     3.2    10.1    +      -       -      +
    312B  GLU*     1.3    77.3    -      -       -      +
    314B  LYS*     1.3    60.7    +      -       -      +
    316B  ILE*     3.3    17.7    +      -       -      +
    317B  SER*     3.1    26.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 314 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    310B  SER      3.0    12.4    +      -       -      +
    311B  PHE*     3.7    10.8    -      -       +      +
    312B  GLU      3.3     0.2    -      -       -      -
    313B  GLU*     1.3    78.0    -      -       -      +
    315B  MET*     1.3    59.0    +      -       +      +
    317B  SER*     3.1     8.9    +      -       -      -
    318B  ASP*     2.9    49.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 315 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    203B  LYS      4.6     3.0    -      -       -      +
    206B  ILE*     3.7    25.4    -      -       +      +
    207B  PRO*     4.7     5.8    -      -       +      +
    227B  THR*     3.7    27.6    -      -       +      +
    231B  GLN*     4.1    12.8    -      -       -      +
    311B  PHE*     3.3    55.0    +      -       +      +
    312B  GLU*     3.3    21.5    +      -       +      +
    314B  LYS*     1.3    78.1    -      -       +      +
    316B  ILE*     1.3    62.9    +      -       -      +
    318B  ASP*     3.4     7.9    +      -       -      +
    319B  ALA*     3.0    27.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 316 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    197B  ILE*     3.9    23.6    -      -       +      -
    206B  ILE*     3.6    21.5    -      -       +      -
    283B  THR*     5.1     2.9    -      -       +      -
    288B  PHE*     4.7    15.8    -      -       +      -
    305B  ILE*     4.0    23.8    -      -       +      -
    308B  VAL*     4.4    11.2    -      -       +      -
    312B  GLU*     3.1    22.8    +      -       +      +
    313B  GLU*     3.5    20.4    -      -       -      +
    314B  LYS      3.2     0.2    -      -       -      -
    315B  MET*     1.3    78.1    -      -       -      +
    317B  SER*     1.3    62.4    +      -       -      +
    319B  ALA*     3.4     2.1    +      -       -      +
    320B  ILE*     3.3    35.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 317 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    313B  GLU*     3.1    18.3    +      -       -      -
    314B  LYS*     3.1    14.2    +      -       -      -
    316B  ILE*     1.3    79.4    -      -       -      +
    318B  ASP*     1.3    65.7    +      -       -      +
    319B  ALA      3.3     0.2    +      -       -      -
    320B  ILE*     3.5    11.5    +      -       -      +
    321B  PRO*     3.3    18.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 318 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    203B  LYS*     5.7     9.4    -      -       +      +
    314B  LYS*     2.9    42.6    +      -       -      +
    315B  MET*     3.9     7.5    -      -       -      +
    317B  SER*     1.3    81.5    +      -       -      +
    319B  ALA*     1.3    60.4    +      -       -      +
    320B  ILE      3.5     0.2    -      -       -      -
    321B  PRO*     3.5    13.7    -      -       -      +
    322B  GLU*     4.8     2.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 319 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    203B  LYS*     3.7    24.5    -      -       -      +
    204B  THR*     3.8    18.2    -      -       +      -
    206B  ILE*     4.1     9.2    -      -       +      -
    288B  PHE*     6.3     0.2    -      -       +      -
    315B  MET      3.0    17.7    +      -       -      +
    316B  ILE      3.9     3.4    -      -       -      +
    317B  SER      3.2     0.2    -      -       -      -
    318B  ASP*     1.3    77.3    -      -       -      +
    320B  ILE*     1.3    65.7    +      -       -      +
    321B  PRO      3.3     0.2    -      -       -      -
    322B  GLU*     3.1    10.3    +      -       -      +
    323B  LEU*     3.1    28.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 320 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    283B  THR*     5.0     7.4    -      -       -      +
    284B  GLU*     3.8    31.6    -      -       +      +
    285B  CYS*     3.8    20.4    -      -       -      -
    288B  PHE*     5.2     4.5    -      -       +      -
    316B  ILE*     3.3    33.2    +      -       +      +
    317B  SER*     3.8     9.2    -      -       -      +
    319B  ALA*     1.3    77.5    -      -       -      +
    321B  PRO*     1.3    72.5    -      -       +      +
    323B  LEU*     3.3     6.1    +      -       +      +
    324B  LYS*     3.0    50.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with PRO 321 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    317B  SER      3.3    16.4    -      -       -      +
    318B  ASP*     3.5    13.9    -      -       -      +
    319B  ALA      3.5     0.2    -      -       -      -
    320B  ILE*     1.3    95.3    -      -       +      +
    322B  GLU*     1.3    62.4    +      -       -      +
    324B  LYS*     3.5     7.5    +      -       +      +
    325B  ALA*     3.1    22.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 322 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    145B  ASN*     4.9     0.7    +      -       -      -
    201B  ALA*     3.9    20.9    -      -       -      +
    202B  GLY*     5.5     0.6    -      -       -      -
    203B  LYS*     4.7    15.6    +      -       -      +
    204B  THR*     3.7    22.1    -      -       +      +
    318B  ASP      4.8     2.1    +      -       -      +
    319B  ALA*     3.1    12.0    +      -       -      +
    321B  PRO*     1.3    75.7    -      -       -      +
    323B  LEU*     1.3    61.8    +      -       -      +
    325B  ALA*     3.2     7.9    +      -       +      +
    326B  SER*     2.9    40.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 323 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    145B  ASN*     3.6    32.0    -      -       +      +
    198B  GLY*     4.3     6.7    -      -       -      -
    199B  GLY*     3.9     9.0    -      -       -      -
    204B  THR*     3.8    13.9    -      -       +      -
    277B  PHE*     4.1    13.2    -      -       +      -
    285B  CYS*     3.8    15.5    -      -       +      -
    287B  TYR      5.1     0.4    -      -       -      +
    288B  PHE*     4.0    32.3    -      -       +      -
    319B  ALA*     3.1    30.9    +      -       +      +
    320B  ILE*     3.3     7.2    +      -       +      +
    322B  GLU*     1.3    74.8    -      -       -      +
    324B  LYS*     1.3    52.2    +      -       -      +
    326B  SER*     3.2     5.4    +      -       -      -
    327B  ILE*     2.8    45.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 324 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    284B  GLU*     2.6    54.8    +      -       -      +
    285B  CYS*     4.1    12.8    -      -       -      -
    320B  ILE*     3.0    29.5    +      -       +      +
    321B  PRO*     3.8     6.5    -      -       +      +
    323B  LEU*     1.3    75.1    -      -       -      +
    325B  ALA*     1.3    57.4    +      -       -      +
    327B  ILE*     3.3     9.1    +      -       +      +
    328B  LYS*     2.8    33.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 325 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    321B  PRO      3.1    12.8    +      -       -      +
    322B  GLU*     3.4    11.2    -      -       +      +
    324B  LYS*     1.3    77.2    -      -       -      +
    326B  SER*     1.3    58.4    +      -       -      +
    328B  LYS*     3.5     6.8    +      -       -      +
    329B  LYS*     3.0    30.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 326 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    111B  ASP*     5.6     2.6    +      -       -      -
    145B  ASN*     3.6    28.5    +      -       -      +
    146B  SER*     2.7    32.3    +      -       -      -
    322B  GLU*     2.9    28.0    +      -       -      +
    323B  LEU*     3.6     4.5    -      -       -      -
    325B  ALA*     1.3    74.1    -      -       -      +
    327B  ILE*     1.3    65.5    +      -       -      +
    329B  LYS*     3.4     4.7    +      -       -      +
    330B  GLY      3.2    12.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 327 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    145B  ASN      4.1     9.9    -      -       -      +
    149B  PRO*     3.7    10.7    -      -       +      +
    277B  PHE*     4.6     3.4    -      -       +      -
    285B  CYS*     3.9    12.1    -      -       +      -
    286B  THR*     4.0    10.8    -      -       -      +
    287B  TYR*     3.6    59.0    -      -       +      +
    323B  LEU*     2.8    32.4    +      -       +      +
    324B  LYS*     3.6     7.9    -      -       +      +
    326B  SER*     1.3    73.6    -      -       -      +
    328B  LYS*     1.3    62.5    +      -       -      +
    330B  GLY      3.3     2.1    +      -       -      -
    331B  GLU*     3.1    44.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 328 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    324B  LYS      2.8    21.9    +      -       -      +
    325B  ALA*     3.8     6.5    -      -       -      +
    327B  ILE*     1.3    73.5    -      -       -      +
    329B  LYS*     1.3    53.5    +      -       -      +
    331B  GLU*     3.3    13.4    +      -       -      +
    332B  ASP*     2.7    66.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 329 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    111B  ASP*     2.9    38.3    +      -       -      +
    114B  PHE*     3.7    41.2    -      -       +      +
    115B  ASN*     5.8     0.4    -      -       -      -
    146B  SER*     4.3     3.6    -      -       -      +
    325B  ALA      3.0    18.4    +      -       -      +
    326B  SER*     3.5     9.0    -      -       -      +
    328B  LYS*     1.3    76.8    -      -       -      +
    330B  GLY*     1.3    57.2    +      -       -      +
    332B  ASP*     3.4     8.9    +      -       -      +
    333B  PHE*     3.0    29.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 330 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    114B  PHE*     4.2     6.0    -      -       -      -
    146B  SER*     3.7    12.1    -      -       -      -
    149B  PRO*     4.4     3.1    -      -       -      -
    150B  ILE*     3.3    36.5    -      -       -      +
    326B  SER      3.2     7.7    +      -       -      -
    327B  ILE      3.3     3.3    +      -       -      -
    329B  LYS*     1.3    79.0    -      -       -      +
    331B  GLU*     1.3    62.1    +      -       -      +
    333B  PHE*     3.4     1.7    +      -       -      +
    334B  VAL*     3.3    18.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 331 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    149B  PRO*     4.3     8.7    -      -       +      +
    153B  GLU*     4.2    35.6    -      -       +      +
    286B  THR*     4.6     8.0    +      -       -      +
    287B  TYR*     3.8    12.4    +      -       +      -
    327B  ILE*     3.1    31.0    +      -       -      +
    328B  LYS*     3.6    19.1    -      -       +      +
    330B  GLY*     1.3    73.9    -      -       -      +
    332B  ASP*     1.3    67.7    +      -       -      +
    334B  VAL*     3.3    13.2    +      -       -      +
    335B  LYS*     3.4    16.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 332 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    328B  LYS*     2.7    61.4    +      -       -      +
    329B  LYS*     3.6     7.5    -      -       -      +
    331B  GLU*     1.3    73.7    -      -       -      +
    333B  PHE*     1.3    63.6    +      -       -      +
    335B  LYS*     3.0    38.4    +      -       +      +
    336B  THR*     3.6    10.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 333 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    114B  PHE*     3.7    19.5    -      +       +      -
    115B  ASN*     5.8     1.8    -      -       -      -
    118B  ALA*     3.6    29.8    -      -       +      -
    119B  THR*     3.5    34.1    -      -       -      -
    122B  ALA*     3.8    14.8    -      -       +      -
    150B  ILE*     3.9    17.5    -      -       +      -
    329B  LYS      3.0    17.8    +      -       -      +
    330B  GLY      3.6     4.3    -      -       -      +
    332B  ASP*     1.3    76.1    -      -       -      +
    334B  VAL*     1.3    65.0    +      -       +      +
    336B  THR*     2.6    34.6    +      -       -      -
    337B  LEU*     3.9    22.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 334 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    150B  ILE*     3.8    39.3    -      -       +      +
    153B  GLU*     3.7    28.0    -      -       +      +
    154B  VAL*     4.4     7.6    -      -       +      +
    157B  LYS*     4.2    27.0    +      -       +      +
    330B  GLY      3.3    13.4    +      -       -      +
    331B  GLU      3.3     8.2    +      -       -      +
    332B  ASP      3.2     0.4    -      -       -      -
    333B  PHE*     1.3    78.3    -      -       +      +
    335B  LYS*     1.3    63.4    +      -       -      +
    336B  THR      3.3     0.2    +      -       -      -
    337B  LEU*     3.4    29.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 335 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    331B  GLU      3.6     8.7    -      -       -      +
    332B  ASP*     3.0    34.8    +      -       +      +
    334B  VAL*     1.3    79.0    -      -       -      +
    336B  THR*     1.3    61.7    +      -       +      +
    337B  LEU      3.4     4.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 336 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    332B  ASP      3.7    13.7    -      -       -      +
    333B  PHE*     2.6    27.8    +      -       -      +
    335B  LYS*     1.3    77.1    -      -       +      +
    337B  LEU*     1.3    66.3    +      -       -      +
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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