Contacts of the helix formed by residues 629 - 660 (chain A) in PDB entry 3A8P


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 ASP 629 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    627A  LYS*     3.6     5.9    -      -       +      +
    628A  GLU*     1.3    75.5    -      -       -      +
    630A  THR*     1.3    62.9    +      -       -      +
    631A  VAL*     3.8     6.9    +      -       -      +
    632A  ARG*     3.4    41.8    +      -       +      +
    633A  LEU*     3.2    20.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 630 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    618A  ALA*     3.5    31.6    +      -       +      +
    619A  SER*     4.6     4.7    -      -       -      +
    622A  ALA*     3.7    21.3    -      -       +      +
    628A  GLU      3.2     8.8    +      -       -      -
    629A  ASP*     1.3    72.5    +      -       -      +
    631A  VAL*     1.3    64.0    +      -       -      +
    633A  LEU*     3.1     4.2    +      -       +      +
    634A  LEU*     2.9    33.2    +      -       +      +
    699A  LEU*     3.7    26.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 631 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    629A  ASP*     3.4     7.3    +      -       -      +
    630A  THR*     1.3    75.1    -      -       -      +
    632A  ARG*     1.3    60.0    +      -       -      +
    634A  LEU*     3.4     3.8    +      -       -      +
    635A  LYS*     3.0    55.1    +      -       +      +
    696A  LEU*     3.9    15.3    -      -       +      -
    699A  LEU*     4.3    19.7    -      -       +      -
    700A  GLN*     3.9    21.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 632 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    629A  ASP*     3.3    36.2    +      -       -      +
    630A  THR      3.2     0.8    -      -       -      -
    631A  VAL*     1.3    77.1    -      -       -      +
    633A  LEU*     1.3    61.2    +      -       -      +
    635A  LYS*     3.5     5.6    +      -       -      -
    636A  SER*     2.9    29.3    +      -       -      -
    639A  ARG*     3.8    11.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 633 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    621A  PHE*     3.8    22.2    -      -       +      -
    622A  ALA*     3.4    35.9    -      -       +      -
    625A  HIS*     3.8    34.5    -      -       +      -
    627A  LYS*     4.1    21.5    -      -       +      -
    629A  ASP      3.2     9.0    +      -       -      +
    630A  THR*     3.1     8.8    +      -       +      +
    632A  ARG*     1.3    79.4    -      -       -      +
    634A  LEU*     1.3    58.1    +      -       -      +
    636A  SER*     3.2     8.1    +      -       -      -
    637A  GLN*     2.9    43.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 634 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    618A  ALA*     4.4     1.1    -      -       +      -
    621A  PHE*     4.0    19.7    -      -       +      -
    630A  THR*     2.9    25.6    +      -       +      +
    631A  VAL      3.6     4.0    -      -       -      +
    633A  LEU*     1.3    77.2    -      -       +      +
    635A  LYS*     1.3    56.9    -      -       -      +
    637A  GLN*     3.2     6.8    +      -       -      +
    638A  THR*     3.0    32.9    +      -       -      +
    692A  MET*     3.8    25.6    -      -       -      +
    695A  TYR*     3.7    22.0    -      -       +      -
    696A  LEU*     3.5    50.9    -      -       +      +
    699A  LEU*     4.1    15.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 635 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    631A  VAL*     3.0    36.8    +      -       +      +
    632A  ARG*     3.9     6.1    -      -       -      +
    634A  LEU*     1.3    73.6    -      -       -      +
    636A  SER*     1.3    66.8    +      -       -      +
    638A  THR*     2.7    23.4    +      -       -      +
    639A  ARG*     3.1    27.0    +      -       -      +
    696A  LEU*     4.0    18.4    -      -       +      -
    700A  GLN*     4.2    18.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 636 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    632A  ARG*     2.9    20.0    +      -       -      -
    633A  LEU*     3.5    11.2    -      -       -      -
    635A  LYS*     1.3    77.3    -      -       -      +
    637A  GLN*     1.3    62.4    +      -       -      +
    639A  ARG*     3.3    28.3    +      -       -      +
    640A  SER*     3.1    22.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 637 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    621A  PHE*     3.3    38.1    -      -       +      -
    625A  HIS*     4.1    10.0    +      -       -      -
    633A  LEU*     2.9    27.4    +      -       +      +
    634A  LEU      3.4     8.1    -      -       -      +
    636A  SER*     1.3    79.7    +      -       -      +
    638A  THR*     1.3    57.8    +      -       -      +
    640A  SER*     3.1    10.8    +      -       -      -
    641A  LEU*     2.8    42.0    +      -       +      +
    692A  MET*     3.8    17.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 638 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    634A  LEU      3.0    14.0    +      -       -      +
    635A  LYS*     2.7    23.4    +      -       -      +
    637A  GLN*     1.3    75.9    -      -       -      +
    639A  ARG*     1.3    64.1    +      -       -      +
    641A  LEU*     4.6     1.6    -      -       -      -
    642A  LEU*     3.0    35.1    +      -       -      +
    689A  LEU*     3.8    22.3    -      -       +      +
    692A  MET*     3.7    22.4    -      -       +      -
    693A  ARG*     4.6    11.0    -      -       +      -
    696A  LEU*     4.0    17.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 639 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    632A  ARG*     3.8    13.9    +      -       -      +
    635A  LYS*     3.1    21.4    +      -       -      +
    636A  SER*     3.3    44.0    +      -       -      +
    638A  THR*     1.3    83.2    +      -       -      +
    640A  SER*     1.3    63.6    +      -       -      +
    642A  LEU*     3.2    11.9    +      -       +      +
    643A  GLN*     3.1    29.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 640 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    636A  SER      3.1    10.9    +      -       -      -
    637A  GLN*     3.5    17.3    +      -       -      -
    639A  ARG*     1.3    77.9    -      -       -      +
    641A  LEU*     1.3    66.5    +      -       -      +
    643A  GLN*     3.0    12.8    +      -       -      +
    644A  LYS*     3.0    43.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 641 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    637A  GLN*     2.8    31.3    +      -       +      +
    638A  THR*     3.9     4.5    -      -       -      +
    640A  SER*     1.3    73.1    -      -       -      +
    642A  LEU*     1.3    56.8    +      -       -      +
    644A  LYS*     3.2    11.5    +      -       +      +
    645A  ILE*     2.9    35.9    +      -       +      +
    685A  PHE*     3.9    36.9    -      -       +      +
    688A  ASP*     3.6    27.8    -      -       +      +
    689A  LEU*     3.5    35.7    -      -       +      +
    692A  MET*     3.9    13.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 642 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    638A  THR*     3.0    32.0    +      -       -      +
    639A  ARG*     3.5     9.4    -      -       +      +
    640A  SER      3.2     0.2    -      -       -      -
    641A  LEU*     1.3    77.4    -      -       -      +
    643A  GLN*     1.3    61.0    +      -       +      +
    645A  ILE*     3.5    12.4    +      -       +      +
    646A  ASP*     3.2    21.3    +      -       -      +
    689A  LEU*     3.6    27.6    -      -       +      -
    693A  ARG*     4.3    18.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 643 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    639A  ARG*     3.1    15.4    +      -       +      +
    640A  SER*     3.0    13.9    +      -       -      +
    642A  LEU*     1.3    73.5    -      -       -      +
    644A  LYS*     1.3    62.9    +      -       +      +
    646A  ASP*     3.1     8.2    +      -       -      +
    647A  MET*     2.9    29.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 644 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    640A  SER*     3.0    35.0    +      -       -      +
    641A  LEU*     3.6    13.6    -      -       +      +
    643A  GLN*     1.3    78.1    -      -       +      +
    645A  ILE*     1.3    56.8    +      -       -      +
    647A  MET*     4.3     6.1    -      -       -      -
    648A  ASP*     2.9    36.9    +      -       -      +
    685A  PHE*     4.0    40.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 645 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    641A  LEU      2.9    21.7    +      -       -      +
    642A  LEU*     3.7    11.4    -      -       +      +
    644A  LYS*     1.3    77.1    -      -       -      +
    646A  ASP*     1.3    57.7    +      -       -      +
    649A  SER*     2.6    46.2    +      -       -      +
    682A  LEU*     3.6     9.7    -      -       +      +
    685A  PHE*     3.5    28.5    -      -       +      +
    686A  HIS*     3.9    46.4    -      -       +      +
    689A  LEU*     4.1    21.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 646 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    642A  LEU      3.2    10.7    +      -       -      +
    643A  GLN*     3.1    11.2    +      -       -      +
    645A  ILE*     1.3    81.2    -      -       -      +
    647A  MET*     1.3    64.8    +      -       -      +
    649A  SER*     3.7     4.9    -      -       -      -
    650A  LYS*     3.2    55.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 647 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    643A  GLN      2.9    16.3    +      -       -      +
    644A  LYS*     3.8     7.9    -      -       -      +
    646A  ASP*     1.3    81.3    +      -       -      +
    648A  ASP*     1.3    65.3    +      -       -      +
    650A  LYS*     3.3    10.1    +      -       -      +
    651A  MET*     3.0    73.9    +      -       +      +
    678A  TRP*     5.7     0.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 648 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    644A  LYS*     2.9    23.9    +      -       -      +
    647A  MET*     1.3    80.0    -      -       -      +
    649A  SER*     1.3    63.9    +      -       -      +
    651A  MET*     3.7     6.1    -      -       -      +
    652A  LYS*     3.0    24.6    +      -       -      +
    678A  TRP*     3.6    33.0    -      -       +      +
    681A  ASN*     3.7    13.3    +      -       -      +
    682A  LEU*     3.6    23.0    -      -       +      +
    685A  PHE*     3.3    22.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 649 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    645A  ILE*     2.6    33.7    +      -       -      +
    646A  ASP*     3.7     6.0    -      -       -      -
    647A  MET      3.3     0.2    -      -       -      -
    648A  ASP*     1.3    77.1    -      -       -      +
    650A  LYS*     1.3    65.8    +      -       -      +
    652A  LYS*     3.3     5.6    +      -       -      +
    653A  LYS*     3.1    31.7    +      -       -      +
    682A  LEU*     3.7    19.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 650 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    646A  ASP*     3.2    41.8    +      -       -      +
    647A  MET*     3.6    10.3    -      -       -      +
    648A  ASP      3.2     0.2    -      -       -      -
    649A  SER*     1.3    77.3    -      -       -      +
    651A  MET*     1.3    76.2    +      -       +      +
    653A  LYS*     3.2     9.7    +      -       +      +
    654A  MET*     3.0    22.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 651 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    647A  MET*     3.0    56.8    +      -       +      +
    648A  ASP      3.7     5.2    -      -       -      +
    649A  SER      3.3     0.4    -      -       -      -
    650A  LYS*     1.3    86.4    -      -       +      +
    652A  LYS*     1.3    57.2    +      -       -      +
    654A  MET*     3.2    11.3    +      -       +      +
    655A  ALA*     2.9    28.9    +      -       -      +
    678A  TRP*     3.5    42.3    +      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 652 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    648A  ASP      3.0    18.6    +      -       -      +
    649A  SER*     3.5     6.5    -      -       -      +
    650A  LYS      3.2     0.2    -      -       -      -
    651A  MET*     1.3    77.6    -      -       -      +
    653A  LYS*     1.3    61.0    +      -       +      +
    655A  ALA*     3.5     2.4    +      -       -      +
    656A  GLU*     3.0    58.7    +      -       -      +
    675A  ILE*     4.1    15.7    -      -       +      -
    678A  TRP*     4.0    20.4    -      -       +      -
    679A  GLU*     3.8    42.9    +      -       -      +
    682A  LEU*     4.0    20.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 653 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    649A  SER*     3.1    20.8    +      -       -      +
    650A  LYS*     3.2    10.1    +      -       +      +
    652A  LYS*     1.3    74.4    -      -       +      +
    654A  MET*     1.3    66.1    +      -       -      +
    656A  GLU*     3.3    18.6    +      -       -      +
    657A  LEU*     2.9    23.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 654 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    650A  LYS      3.0    13.4    +      -       -      +
    651A  MET*     3.2    17.5    +      -       +      +
    653A  LYS*     1.3    78.5    -      -       -      +
    655A  ALA*     1.3    62.9    +      -       -      +
    657A  LEU*     3.1    28.7    +      -       +      +
    658A  GLN*     2.9    61.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 655 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    651A  MET      2.9    16.1    +      -       -      +
    652A  LYS      3.7     4.9    -      -       -      +
    653A  LYS      3.3     0.2    -      -       -      -
    654A  MET*     1.3    76.0    -      -       -      +
    656A  GLU*     1.3    56.8    +      -       -      +
    658A  GLN*     3.1    11.5    +      -       -      +
    659A  LEU*     2.9    27.7    +      -       -      +
    671A  ILE*     3.8     9.4    -      -       +      +
    674A  GLN*     4.2    21.8    -      -       -      +
    675A  ILE*     3.9    19.1    -      -       +      -
    678A  TRP*     4.2     7.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 656 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    652A  LYS*     3.0    53.0    +      -       -      +
    653A  LYS*     3.5    23.6    +      -       -      +
    654A  MET      3.2     0.2    -      -       -      -
    655A  ALA*     1.3    77.1    -      -       -      +
    657A  LEU*     1.3    62.2    +      -       -      +
    659A  LEU*     3.1     6.8    +      -       +      +
    660A  SER*     3.0    22.5    +      -       -      -
    675A  ILE*     3.7    29.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 657 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    653A  LYS      2.9    13.9    +      -       -      +
    654A  MET*     3.1    31.8    +      -       +      +
    656A  GLU*     1.3    75.0    -      -       -      +
    658A  GLN*     1.3    65.4    +      -       -      +
    660A  SER*     2.6    32.8    +      -       -      +
    661A  VAL*     4.3     3.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 658 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    654A  MET*     2.9    60.2    +      -       +      +
    655A  ALA*     3.5     9.2    -      -       -      +
    657A  LEU*     1.3    84.2    -      -       -      +
    659A  LEU*     1.3    60.6    +      -       -      +
    660A  SER      3.4     0.5    +      -       -      -
    661A  VAL*     3.5    21.9    -      -       -      +
    662A  VAL*     3.5    10.0    -      -       -      +
    671A  ILE*     4.7     9.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 659 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    655A  ALA      2.9    12.7    +      -       -      +
    656A  GLU*     3.1    11.2    +      -       +      +
    658A  GLN*     1.3    77.8    -      -       -      +
    660A  SER*     1.3    62.6    +      -       -      +
    662A  VAL*     3.0    13.8    +      -       +      -
    668A  ARG*     3.1    72.5    +      -       +      +
    671A  ILE*     3.9    22.1    -      -       +      +
    672A  GLU*     4.1    13.5    -      -       +      +
    675A  ILE*     3.8    21.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 660 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    656A  GLU      3.0    10.0    +      -       -      -
    657A  LEU*     2.6    31.6    +      -       -      +
    659A  LEU*     1.3    77.1    -      -       -      +
    661A  VAL*     1.3    66.6    +      -       -      +
    668A  ARG*     4.1    12.6    +      -       -      +
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


   I  Hydrophilic      - N and O that can donate and accept hydrogen bonds
                         (e.g., oxygen of hydroxyl group of Ser. or Thr)
  II  Acceptor         - N or O that can only accept a hydrogen bond
 III  Donor            - N that can only donate a hydrogen bond
  IV  Hydrophobic      - Cl, Br, I and all C atoms that are not in
                         aromatic rings and do not have a covalent bond to
                         a N or O atom
   V  Aromatic         - C in aromatic rings irrespective of any other 
                         bonds formed by the atom
  VI  Neutral          - C atoms that have a covalent bond to at least one
                         atom of class I or two or more atoms from class II
                         or III; atoms; S, F, P, and metal atoms in all cases
 VII  Neutral-donor    - C atoms that have a covalent bond with only one
                         atom of class III
VIII  Neutral-acceptor - C atoms that have a covalent bond with only 
                         one atom of class II
For each pair of contacts the state of legitimacy is shown below:

Legend:
+, legitimate
-, illegitimate
------------------------------------------------------------
  Atomic class           I  II  III   IV   V   VI  VII  VIII
------------------------------------------------------------
   I  (Hydrophilic)      +   +    +    -   +   +    +    +
  II  (Acceptor)         +   -    +    -   +   +    +    -
 III  (Donor)            +   +    -    -   +   +    -    +
  IV  (Hydrophobic)      -   -    -    +   +   +    +    +
   V  (Aromatic)         +   +    +    +   +   +    +    +
  VI  (Neutral)          +   +    +    +   +   +    +    +
 VII  (Neutral-donor)    +   +    -    +   +   +    -    +
VIII  (Neutral-acceptor) +   -    +    +   +   +    +    -
------------------------------------------------------------
Warning!
Atom classes for heterogroups are automatically assigned based on the atomic coordinates. However, in three cases (see below) the automatic assignment is currently ambiguous. In these cases, the user is advised to manually analyse the full list of contacts using LPC software.
1. Carbon atoms belonging to a 4-, 5- or 6-member ring are 
   considered "aromatic" (Class V) if the ring is approximately
   planar, and "hydrophobic" (Class IV) or "neutral" (Classes
   VI, VII, VIII) if the ring is non-planar.
2. The oxygen atom of a carbonyl or hydroxy group is considered
   "hydroxy" (Class I) if the CO bond is longer than 1.29 Å, and
   "carbonyl" (Class II) if shorter.
3. All nitrogen atoms are considered "hydrophilic" (Class I).

Please E-mail any questions and/or suggestions concerning this page to Vladimir.Sobolev@weizmann.ac.il