Contacts of the helix formed by residues 434 - 461 (chain l) in PDB entry 6QX2


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 THR 434 (chain l).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    398j  ILE*     3.5    33.9    -      -       +      +
    399j  ARG      4.6     0.4    -      -       -      -
    401j  SER      3.6     7.0    -      -       -      +
    402j  ASP      4.2     6.9    +      -       -      -
    403j  THR      4.2    19.8    -      -       -      +
    404j  ASP*     4.6     4.4    +      -       -      +
    407j  ALA*     4.3     7.2    -      -       +      -
    426j  LEU*     5.2     0.4    -      -       +      -
    431l  ARG*     3.4    16.1    +      -       -      +
    432l  ARG      3.4     0.9    -      -       -      +
    433l  LEU*     1.3    83.5    -      -       -      +
    435l  GLY*     1.3    64.1    +      -       -      +
    437l  GLU*     2.7    40.4    +      -       -      +
    438l  ARG*     3.7     7.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 435 (chain l). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    399j  ARG      4.1     6.7    +      -       -      -
    401j  SER      3.2    13.3    +      -       -      -
    402j  ASP*     4.1     6.1    -      -       -      -
    434l  THR*     1.3    70.9    -      -       -      +
    436l  LEU*     1.3    65.5    +      -       -      +
    437l  GLU      3.3     0.5    +      -       -      -
    438l  ARG*     3.5    14.5    +      -       -      +
    439l  ASP*     3.8    14.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 436 (chain l). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    402j  ASP*     3.1    20.4    +      -       +      +
    403j  THR*     3.9    26.7    -      -       +      -
    434l  THR      3.5     0.2    -      -       -      -
    435l  GLY*     1.3    75.3    -      -       -      +
    437l  GLU*     1.3    67.4    +      -       -      +
    439l  ASP*     3.4    14.2    +      -       +      +
    440l  LYS*     3.0    36.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 437 (chain l). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    402j  ASP      5.0     0.2    -      -       -      +
    403j  THR*     5.5     0.3    -      -       -      -
    404j  ASP*     5.2     7.1    +      -       -      +
    431l  ARG*     3.7    19.6    -      -       +      +
    432l  ARG*     3.4    28.7    -      -       +      +
    434l  THR*     2.7    30.5    +      -       -      +
    435l  GLY      3.2     1.0    -      -       -      -
    436l  LEU*     1.3    82.8    -      -       -      +
    438l  ARG*     1.3    63.1    +      -       -      +
    440l  LYS*     3.5    21.5    +      -       +      +
    441l  ILE*     3.2    30.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 438 (chain l). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    385l  ARG*     3.7    24.4    -      -       -      +
    388l  LEU*     3.8    26.8    -      -       +      +
    389l  ASP*     3.1    38.9    +      -       -      +
    432l  ARG      4.7     2.8    +      -       -      +
    434l  THR      3.7     7.2    +      -       -      +
    435l  GLY*     3.5    10.6    +      -       -      +
    436l  LEU      3.4     0.4    -      -       -      -
    437l  GLU*     1.3    77.4    -      -       -      +
    439l  ASP*     1.3    64.9    +      -       -      +
    441l  ILE*     3.5    10.0    +      -       -      +
    442l  GLU*     3.2    47.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 439 (chain l). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    435l  GLY      3.8    11.8    +      -       -      +
    436l  LEU*     3.4    17.2    +      -       +      +
    437l  GLU      3.3     0.4    -      -       -      -
    438l  ARG*     1.3    77.9    -      -       -      +
    440l  LYS*     1.3    55.9    +      -       -      +
    442l  GLU*     3.2     7.0    +      -       -      +
    443l  ALA*     2.9    35.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 440 (chain l). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    436l  LEU*     3.0    25.8    +      -       +      +
    437l  GLU*     3.6    24.9    -      -       +      +
    438l  ARG      3.4     0.2    -      -       -      -
    439l  ASP*     1.3    75.9    -      -       -      +
    441l  ILE*     1.3    57.4    +      -       +      +
    443l  ALA*     3.6     7.1    -      -       -      +
    444l  GLU*     3.1    29.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 441 (chain l). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    377l  ARG*     6.0     1.1    -      -       -      +
    381l  LEU*     4.0    26.8    -      -       +      +
    384l  LEU*     4.2    28.9    -      -       +      +
    385l  ARG*     3.9    26.9    -      -       +      +
    388l  LEU*     5.8     4.3    -      -       +      -
    428l  MET*     5.6     6.1    -      -       -      -
    432l  ARG*     5.3    11.7    -      -       +      +
    437l  GLU*     3.2    23.1    +      -       +      +
    438l  ARG*     3.7    12.3    -      -       -      +
    439l  ASP      3.2     0.4    -      -       -      -
    440l  LYS*     1.3    76.1    -      -       +      +
    442l  GLU*     1.3    60.1    +      -       -      +
    444l  GLU*     3.5     8.8    +      -       -      +
    445l  TYR*     3.0    24.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 442 (chain l). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    385l  ARG*     2.5    44.5    +      -       -      -
    438l  ARG*     3.2    31.3    +      -       -      +
    439l  ASP*     3.2     9.4    +      -       -      +
    441l  ILE*     1.3    75.8    -      -       -      +
    443l  ALA*     1.3    63.0    +      -       -      +
    445l  TYR*     3.3     6.4    +      -       -      +
    446l  ASN*     2.8    54.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 443 (chain l). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    439l  ASP      2.9    16.9    +      -       -      +
    440l  LYS*     3.6     9.4    -      -       -      +
    442l  GLU*     1.3    76.8    -      -       -      +
    444l  GLU*     1.3    61.0    -      -       -      +
    446l  ASN*     3.3     6.1    +      -       -      +
    447l  GLU*     3.2    23.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 444 (chain l). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    377l  ARG*     2.8    48.8    +      -       -      +
    381l  LEU*     3.7    12.0    -      -       +      +
    440l  LYS      3.1    15.6    +      -       -      +
    441l  ILE*     3.8     7.4    -      -       -      +
    442l  GLU      3.4     0.2    -      -       -      -
    443l  ALA*     1.3    78.3    -      -       -      +
    445l  TYR*     1.3    56.7    +      -       -      +
    447l  GLU*     3.6     6.0    +      -       -      +
    448l  LEU*     3.1    30.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 445 (chain l). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    378l  ALA*     3.6    18.4    -      -       +      -
    381l  LEU*     3.7    27.4    -      -       +      -
    382l  GLU*     2.8    43.7    +      -       +      +
    385l  ARG*     3.8    37.9    +      -       -      -
    441l  ILE      3.0    18.0    +      -       -      +
    442l  GLU*     3.6    14.1    -      -       -      +
    443l  ALA      3.2     0.4    -      -       -      -
    444l  GLU*     1.3    76.5    -      -       -      +
    446l  ASN*     1.3    64.0    +      -       -      +
    448l  LEU*     3.4     4.8    -      -       +      +
    449l  LEU*     3.2    55.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 446 (chain l). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    442l  GLU*     2.8    50.2    +      -       -      +
    443l  ALA*     3.3     6.2    +      -       -      +
    445l  TYR*     1.3    76.6    -      -       -      +
    447l  GLU*     1.3    63.3    +      -       -      +
    449l  LEU*     3.2    25.8    +      -       -      +
    450l  ASN*     3.3    19.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 447 (chain l). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    443l  ALA      3.2    15.9    +      -       -      +
    444l  GLU*     3.9     7.2    -      -       -      +
    446l  ASN*     1.3    74.5    -      -       -      +
    448l  LEU*     1.3    56.5    +      -       -      +
    450l  ASN*     3.3    20.5    +      -       -      +
    451l  TYR*     2.9    28.2    +      -       -      +
    454l  GLU*     5.7     0.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 448 (chain l). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    374l  ALA*     3.4    35.9    -      -       +      +
    377l  ARG*     3.6    19.1    -      -       +      -
    378l  ALA*     3.4    41.3    -      -       +      +
    381l  LEU*     4.1    11.0    -      -       +      -
    444l  GLU*     3.1    20.0    +      -       +      +
    445l  TYR*     3.4     7.4    -      -       -      +
    447l  GLU*     1.3    76.3    -      -       -      +
    449l  LEU*     1.3    52.0    +      -       -      +
    451l  TYR*     3.3    13.7    +      -       +      +
    452l  ILE*     2.8    42.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 449 (chain l). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    378l  ALA*     5.3     2.7    -      -       +      -
    382l  GLU*     5.4     0.9    -      -       -      +
    445l  TYR*     3.2    56.6    +      -       +      +
    446l  ASN*     3.2    17.4    +      -       -      +
    448l  LEU*     1.3    74.2    -      -       +      +
    450l  ASN*     1.3    63.9    -      -       -      +
    452l  ILE*     3.4    17.8    +      -       +      +
    453l  SER*     3.2    22.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 450 (chain l). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    446l  ASN*     3.3    15.3    +      -       -      +
    447l  GLU*     3.3    28.1    +      -       -      +
    449l  LEU*     1.3    77.4    -      -       -      +
    451l  TYR*     1.3    57.5    +      -       -      +
    453l  SER*     2.7    26.5    +      -       -      -
    454l  GLU*     2.9    26.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 451 (chain l). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    370l  ASN*     3.2    33.9    +      -       +      +
    374l  ALA*     4.2    18.2    -      -       +      -
    447l  GLU*     2.9    17.2    +      -       -      +
    448l  LEU*     3.5    16.8    -      -       +      +
    450l  ASN*     1.3    73.0    -      -       -      +
    452l  ILE*     1.3    64.4    +      -       -      +
    454l  GLU*     3.2    21.7    +      -       +      +
    455l  LEU*     2.9    62.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 452 (chain l). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    371l  LEU*     3.7    15.7    -      -       +      +
    374l  ALA*     3.8    29.8    -      -       +      +
    375l  LYS*     4.2     9.2    -      -       +      +
    378l  ALA*     3.9    27.6    -      -       +      -
    448l  LEU*     2.8    28.4    +      -       +      +
    449l  LEU*     3.8    15.9    -      -       +      +
    450l  ASN      3.3     0.2    -      -       -      -
    451l  TYR*     1.3    71.3    -      -       -      +
    453l  SER*     1.3    56.9    +      -       -      +
    455l  LEU*     3.4     5.4    +      -       -      +
    456l  GLU*     3.1    49.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 453 (chain l). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    449l  LEU      3.2    13.3    +      -       -      -
    450l  ASN*     2.7    21.5    +      -       -      -
    452l  ILE*     1.3    74.9    -      -       -      +
    454l  GLU*     1.3    58.2    +      -       -      +
    456l  GLU*     3.3    12.9    +      -       -      +
    457l  THR*     2.8    34.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 454 (chain l). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    447l  GLU*     5.7     0.7    -      -       -      +
    450l  ASN*     2.9    24.0    +      -       -      +
    451l  TYR*     3.5    28.6    +      -       +      +
    453l  SER*     1.3    81.7    +      -       -      +
    455l  LEU*     1.3    62.1    +      -       +      +
    457l  THR*     3.5     9.7    +      -       -      -
    458l  ILE*     3.4    29.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 455 (chain l). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    367l  THR*     3.6    29.1    -      -       +      +
    370l  ASN*     3.8     9.0    -      -       +      +
    371l  LEU*     3.5    40.6    -      -       +      +
    374l  ALA*     4.6     1.1    -      -       +      -
    451l  TYR*     2.9    65.7    +      -       +      +
    452l  ILE*     3.6     8.1    -      -       -      +
    453l  SER      3.3     0.2    -      -       -      -
    454l  GLU*     1.3    75.5    -      -       +      +
    456l  GLU*     1.3    62.9    +      -       -      +
    458l  ILE*     3.2    17.6    +      -       +      +
    459l  LEU*     3.2    21.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 456 (chain l). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    371l  LEU*     4.0    20.2    -      -       +      +
    452l  ILE*     3.1    37.4    +      -       -      +
    453l  SER*     3.3    13.7    +      -       -      +
    455l  LEU*     1.3    74.0    -      -       -      +
    457l  THR*     1.3    56.5    -      -       -      +
    459l  LEU*     3.3     8.4    +      -       +      +
    460l  ALA*     2.9    36.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 457 (chain l). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    453l  SER      2.8    21.4    +      -       -      -
    454l  GLU*     3.5    11.8    +      -       -      -
    456l  GLU*     1.3    76.1    -      -       -      +
    458l  ILE*     1.3    60.3    +      -       -      +
    460l  ALA*     3.5     6.6    +      -       -      +
    461l  ASP*     3.2    25.2    +      -       +      +
    464l  VAL*     4.1    20.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 458 (chain l). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    363l  VAL*     5.3     0.4    -      -       +      -
    364l  ARG*     5.2     0.7    +      -       -      -
    367l  THR*     3.9    25.4    -      -       +      +
    454l  GLU*     3.4    18.6    +      -       +      +
    455l  LEU*     3.2    20.0    +      -       +      +
    457l  THR*     1.3    74.4    -      -       -      +
    459l  LEU*     1.3    64.1    +      -       +      +
    461l  ASP      3.3    17.7    -      -       -      +
    462l  GLU*     4.9     0.2    -      -       -      -
    464l  VAL*     3.8    22.2    -      -       +      -
    465l  LEU*     3.7    36.9    -      -       +      +
    468l  LEU*     3.8    26.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 459 (chain l). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    364l  ARG*     4.1    32.7    +      -       +      +
    367l  THR*     3.7    21.1    -      -       +      -
    368l  GLN*     3.6    39.9    -      -       +      +
    371l  LEU*     3.6    31.2    -      -       +      -
    455l  LEU      3.2    16.1    +      -       -      +
    456l  GLU*     3.3     6.5    +      -       +      +
    458l  ILE*     1.3    78.3    -      -       +      +
    460l  ALA*     1.3    61.2    +      -       -      +
    461l  ASP      5.0     0.9    -      -       -      -
    462l  GLU*     5.2     1.0    +      -       -      +
    465l  LEU*     5.4     0.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 460 (chain l). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    456l  GLU      2.9    19.0    +      -       -      +
    457l  THR*     3.7     7.9    -      -       -      +
    458l  ILE      3.3     0.4    -      -       -      -
    459l  LEU*     1.3    78.6    -      -       -      +
    461l  ASP*     1.3    59.3    +      -       +      +
    462l  GLU      4.1     1.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 461 (chain l). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    457l  THR*     3.2     8.9    +      -       +      +
    458l  ILE      3.3     8.1    -      -       -      +
    460l  ALA*     1.3    78.1    -      -       +      +
    462l  GLU*     1.3    56.3    +      -       -      +
    463l  GLU*     3.2    21.5    +      -       -      +
    464l  VAL*     2.9    50.6    +      -       +      +
    465l  LEU      3.3     8.1    +      -       -      -
----------------------------------------------------------
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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