Contacts of the helix formed by residues 291 - 318 (chain D) in PDB entry 2DFD


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 291 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    192D  SER*     4.1    10.5    +      -       -      -
    205D  LEU*     6.0     0.7    -      -       -      +
    290D  VAL*     1.3    76.4    -      -       -      +
    292D  SER*     1.3    57.1    +      -       -      +
    293D  PHE*     3.4    11.5    +      -       -      +
    294D  GLU*     2.9    40.3    +      -       -      +
    295D  GLU*     2.9    27.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 292 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    290D  VAL      4.1     0.2    +      -       -      -
    291D  SER*     1.3    72.3    -      -       -      +
    293D  PHE*     1.3    62.2    +      -       -      +
    295D  GLU*     3.4     7.5    +      -       -      +
    296D  LYS*     3.0    25.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 293 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    202D  GLN*     3.7    37.5    -      -       -      +
    205D  LEU*     4.2    17.0    -      -       +      -
    206D  THR*     4.3    14.1    -      -       +      -
    209D  THR*     3.7    23.8    -      -       +      -
    291D  SER*     3.2    10.9    +      -       -      +
    292D  SER*     1.3    78.8    -      -       -      +
    294D  GLU*     1.3    61.2    +      -       +      +
    296D  LYS*     3.4     7.3    +      -       +      +
    297D  MET*     3.1    58.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 294 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    188D  ILE*     4.4     0.7    -      -       -      +
    189D  PRO      3.9     3.2    -      -       -      +
    190D  LEU*     3.3    26.9    -      -       +      -
    191D  ILE*     3.2    13.3    +      -       -      +
    192D  SER*     2.6    48.2    +      -       -      -
    290D  VAL*     3.6    11.1    -      -       +      +
    291D  SER*     2.9    33.4    +      -       -      +
    293D  PHE*     1.3    76.7    -      -       +      +
    295D  GLU*     1.3    59.4    +      -       -      +
    297D  MET*     3.2    23.8    +      -       +      +
    298D  ILE*     3.0    33.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 295 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    290D  VAL*     4.2    20.5    -      -       +      +
    291D  SER      2.9    17.0    +      -       -      +
    292D  SER*     3.7     8.5    -      -       -      +
    293D  PHE      3.4     0.2    -      -       -      -
    294D  GLU*     1.3    75.9    -      -       -      +
    296D  LYS*     1.3    56.3    +      -       -      +
    298D  ILE*     3.2    16.8    +      -       -      +
    299D  SER*     3.0    28.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 296 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    292D  SER      3.0    17.6    +      -       -      +
    293D  PHE*     3.7     7.2    -      -       +      +
    295D  GLU*     1.3    77.4    -      -       -      +
    297D  MET*     1.3    56.9    +      -       +      +
    299D  SER*     3.4     6.8    +      -       -      -
    300D  ASP*     2.8    54.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 297 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    185D  LYS*     4.6     4.6    -      -       +      +
    188D  ILE*     3.7    27.2    -      -       +      +
    189D  PRO*     4.3     7.0    -      -       -      +
    209D  THR*     3.6    27.4    -      -       +      -
    213D  GLN*     3.9    14.8    -      -       -      +
    293D  PHE*     3.1    47.2    +      -       +      +
    294D  GLU*     3.2    31.6    +      -       +      +
    296D  LYS*     1.3    75.6    -      -       +      +
    298D  ILE*     1.3    62.8    +      -       -      +
    300D  ASP*     3.4     6.5    +      -       -      +
    301D  ALA*     3.0    26.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 298 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    179D  ILE*     3.7    25.6    -      -       +      -
    188D  ILE*     3.6    20.6    -      -       +      -
    190D  LEU*     5.1     0.7    -      -       +      -
    265D  THR*     4.9     3.4    -      -       +      -
    270D  PHE*     4.3    19.9    -      -       +      -
    287D  ILE*     3.8    27.4    -      -       +      -
    290D  VAL*     4.6     8.1    -      -       +      -
    294D  GLU      3.0    21.2    +      -       -      +
    295D  GLU*     3.2    22.4    +      -       -      +
    297D  MET*     1.3    75.3    -      -       -      +
    299D  SER*     1.3    65.5    +      -       -      +
    301D  ALA*     3.1    12.3    +      -       -      +
    302D  ILE*     3.3    25.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 299 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    295D  GLU*     3.0    17.9    +      -       -      -
    296D  LYS*     3.6     7.4    -      -       -      -
    298D  ILE*     1.3    78.6    -      -       -      +
    300D  ASP*     1.3    67.5    +      -       -      +
    301D  ALA      3.2     0.7    +      -       -      -
    302D  ILE*     3.4    20.4    +      -       -      +
    303D  PRO*     3.6     8.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 300 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    185D  LYS*     6.4     2.2    -      -       +      -
    296D  LYS*     2.8    40.4    +      -       -      +
    297D  MET*     3.9     6.8    -      -       -      +
    299D  SER*     1.3    82.2    +      -       -      +
    301D  ALA*     1.3    58.9    +      -       -      +
    303D  PRO*     3.6    11.9    -      -       -      +
    304D  GLU*     5.1     2.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 301 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    180D  GLY*     6.1     0.2    -      -       -      -
    185D  LYS*     3.9    20.4    -      -       -      +
    186D  THR*     3.9    18.1    -      -       +      +
    188D  ILE*     4.0    10.3    -      -       +      -
    270D  PHE*     6.1     1.8    -      -       +      -
    297D  MET      3.0    16.6    +      -       -      +
    298D  ILE      3.1     4.9    +      -       -      +
    300D  ASP*     1.3    77.7    -      -       -      +
    302D  ILE*     1.3    65.3    +      -       +      +
    303D  PRO*     3.4     2.1    -      -       -      -
    304D  GLU*     3.4     6.9    +      -       -      +
    305D  LEU*     3.1    27.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 302 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    265D  THR*     4.8    11.2    -      -       +      +
    266D  GLU*     3.7    45.3    -      -       +      +
    267D  CYS*     4.0    22.4    -      -       -      -
    270D  PHE*     5.2     3.6    -      -       +      -
    298D  ILE*     3.3    28.2    +      -       +      +
    299D  SER*     3.4    12.8    +      -       -      +
    301D  ALA*     1.3    77.4    -      -       -      +
    303D  PRO*     1.3    67.7    -      -       +      +
    305D  LEU*     3.2     3.2    +      -       -      +
    306D  LYS*     2.9    35.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with PRO 303 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    299D  SER      3.6     7.6    -      -       -      +
    300D  ASP*     3.6    13.5    -      -       -      +
    301D  ALA      3.5     3.8    -      -       -      -
    302D  ILE*     1.3    97.6    -      -       +      +
    304D  GLU*     1.3    61.4    +      -       -      +
    306D  LYS*     3.3     7.1    +      -       +      +
    307D  ALA*     3.0    24.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 304 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    127D  ASN*     4.8     1.4    +      -       -      +
    183D  ALA*     3.9    22.9    -      -       -      +
    184D  GLY*     5.5     0.6    -      -       -      -
    185D  LYS*     4.9     7.6    +      -       -      +
    186D  THR*     3.4    26.4    +      -       +      +
    300D  ASP      5.1     1.7    +      -       -      +
    301D  ALA*     3.4     9.1    +      -       -      +
    302D  ILE      3.4     0.6    -      -       -      -
    303D  PRO*     1.3    79.0    -      -       -      +
    305D  LEU*     1.3    64.0    +      -       -      +
    307D  ALA*     3.4     8.0    +      -       -      +
    308D  SER*     3.0    29.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 305 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    127D  ASN*     3.4    37.0    -      -       +      +
    180D  GLY*     4.0    12.6    -      -       -      +
    181D  GLY*     3.9    11.7    -      -       -      -
    186D  THR*     4.1     9.6    -      -       +      -
    259D  PHE*     4.1    10.3    -      -       +      -
    267D  CYS*     3.8    13.0    -      -       -      -
    269D  TYR      4.2     5.8    -      -       -      +
    270D  PHE*     3.4    37.9    -      -       +      -
    301D  ALA*     3.1    18.5    +      -       +      +
    302D  ILE*     3.7     7.0    -      -       -      +
    304D  GLU*     1.3    75.5    -      -       -      +
    306D  LYS*     1.3    65.0    +      -       -      +
    308D  SER*     3.2     4.5    +      -       -      -
    309D  ILE*     2.9    31.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 306 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    266D  GLU*     3.4    53.6    -      -       -      +
    267D  CYS*     4.3    12.8    -      -       -      +
    268D  THR*     6.3     1.8    -      -       +      -
    302D  ILE*     2.9    26.1    +      -       +      +
    303D  PRO*     3.7     7.2    -      -       +      +
    305D  LEU*     1.3    75.0    -      -       -      +
    307D  ALA*     1.3    57.1    +      -       -      +
    309D  ILE*     3.2    10.7    +      -       +      +
    310D  LYS*     2.9    30.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 307 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    303D  PRO      3.0    17.0    +      -       -      +
    304D  GLU*     3.7     7.6    -      -       -      +
    306D  LYS*     1.3    76.1    -      -       -      +
    308D  SER*     1.3    56.9    +      -       -      +
    310D  LYS*     3.3     5.8    +      -       -      +
    311D  LYS*     2.9    30.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 308 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     93D  ASP*     4.6    14.1    +      -       -      -
    127D  ASN*     3.7    32.2    +      -       -      +
    128D  SER*     2.7    29.2    +      -       -      -
    304D  GLU*     3.0    25.9    +      -       -      +
    305D  LEU*     3.7     4.3    -      -       -      -
    307D  ALA*     1.3    74.8    -      -       -      +
    309D  ILE*     1.3    62.7    +      -       -      +
    311D  LYS*     3.4     6.3    +      -       -      +
    312D  GLY      3.2    11.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 309 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    127D  ASN      4.0    10.5    -      -       -      +
    131D  PRO*     3.8    10.4    -      -       +      +
    259D  PHE*     4.6     3.1    -      -       +      -
    267D  CYS*     4.2     5.6    -      -       +      -
    268D  THR*     3.5    25.4    -      -       +      +
    269D  TYR*     3.5    55.0    -      -       +      +
    305D  LEU*     2.9    26.6    +      -       +      +
    306D  LYS*     3.5    10.1    -      -       +      +
    308D  SER*     1.3    77.4    -      -       -      +
    310D  LYS*     1.3    63.6    +      -       -      +
    312D  GLY*     3.3     3.1    +      -       -      -
    313D  GLU*     3.1    44.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 310 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    306D  LYS      2.9    16.0    +      -       -      +
    307D  ALA*     3.9     6.5    -      -       -      +
    309D  ILE*     1.3    76.7    -      -       -      +
    311D  LYS*     1.3    57.3    +      -       -      +
    313D  GLU*     3.7    13.2    -      -       -      +
    314D  ASP*     2.7    69.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 311 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     93D  ASP*     4.4    25.4    +      -       -      +
     96D  PHE*     3.4    57.4    -      -       +      -
     97D  ASN*     5.7     0.6    +      -       -      -
    128D  SER*     4.2     5.2    -      -       -      +
    307D  ALA      2.9    18.4    +      -       -      +
    308D  SER*     3.6     7.4    -      -       -      +
    309D  ILE      3.2     0.2    -      -       -      -
    310D  LYS*     1.3    76.3    -      -       -      +
    312D  GLY*     1.3    62.0    +      -       -      +
    314D  ASP*     3.6     6.5    +      -       -      +
    315D  PHE      3.1    17.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 312 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     96D  PHE*     4.0     8.4    -      -       -      -
    128D  SER      3.8    11.7    -      -       -      -
    131D  PRO*     4.6     0.4    -      -       -      -
    132D  ILE*     3.4    32.2    -      -       -      +
    308D  SER      3.2    11.1    +      -       -      -
    309D  ILE      3.3     2.4    +      -       -      -
    311D  LYS*     1.3    74.7    -      -       -      +
    313D  GLU*     1.3    64.9    +      -       -      +
    315D  PHE*     3.1     9.2    +      -       -      +
    316D  VAL*     3.1    12.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 313 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    131D  PRO*     4.4     7.7    -      -       +      +
    135D  GLU*     4.1    36.6    -      -       +      +
    268D  THR*     4.3     5.7    +      -       -      +
    269D  TYR*     3.9    11.3    +      -       -      -
    309D  ILE*     3.1    36.9    +      -       -      +
    310D  LYS*     3.7    17.0    -      -       -      +
    312D  GLY*     1.3    73.0    -      -       -      +
    314D  ASP*     1.3    67.6    +      -       -      +
    316D  VAL*     3.3     5.0    +      -       -      +
    317D  LYS*     3.3    33.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 314 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    310D  LYS*     2.7    57.4    +      -       -      +
    311D  LYS*     3.8     6.1    -      -       -      +
    313D  GLU*     1.3    76.0    -      -       -      +
    315D  PHE*     1.3    66.3    +      -       -      +
    317D  LYS*     3.4    33.1    +      -       -      +
    318D  THR*     3.6    11.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 315 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     96D  PHE*     3.6    28.7    -      +       +      -
     97D  ASN*     5.3     1.8    -      -       -      -
    100D  ALA*     3.5    41.7    -      -       +      -
    101D  THR*     3.5    28.5    -      -       -      -
    104D  ALA*     3.8    10.8    -      -       +      -
    132D  ILE*     4.0     8.3    -      -       +      -
    311D  LYS      3.1     8.3    +      -       -      +
    312D  GLY      3.1     4.2    +      -       -      +
    314D  ASP*     1.3    72.9    -      -       -      +
    316D  VAL*     1.4    69.6    +      -       +      +
    318D  THR*     2.7    37.5    +      -       +      -
    319D  LEU*     3.6    32.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 316 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132D  ILE*     3.5    50.5    -      -       +      +
    135D  GLU*     3.7    29.6    -      -       +      +
    136D  VAL*     3.9    19.5    -      -       +      -
    139D  LYS*     5.5     4.5    -      -       +      -
    312D  GLY      3.1     7.0    +      -       -      +
    313D  GLU      3.3     5.3    +      -       -      +
    315D  PHE*     1.4    75.4    -      -       +      +
    317D  LYS*     1.3    62.5    +      -       +      +
    319D  LEU*     3.2    28.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 317 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    135D  GLU*     5.0    10.1    +      -       -      -
    313D  GLU*     3.3    20.7    +      -       -      +
    314D  ASP*     3.6    27.1    -      -       -      +
    315D  PHE      3.1     0.6    +      -       -      -
    316D  VAL*     1.3    80.0    -      -       +      +
    318D  THR*     1.4    58.3    +      -       +      +
    319D  LEU      3.2     7.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 318 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    314D  ASP      3.6    14.8    -      -       -      +
    315D  PHE*     2.7    30.8    +      -       +      +
    317D  LYS*     1.4    71.9    -      -       +      +
    319D  LEU*     1.3    67.7    +      -       -      +
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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