Contacts of the helix formed by residues 45 - 70 (chain B) in PDB entry 1JTY


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 45 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     43B  PHE*     3.3     4.2    +      -       -      -
     44B  LYS*     1.3    81.3    -      -       +      +
     46B  LYS*     1.3    78.3    +      -       -      +
     47B  GLU*     3.7    21.0    +      -       +      +
     48B  ASN*     2.9    36.8    +      -       -      +
     49B  LEU*     3.1    12.6    +      -       -      +
    106B  TYR*     4.7     7.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 46 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     15B  PHE*     4.8     7.0    -      -       +      -
     20B  TYR*     3.2    54.4    +      -       +      +
     21B  ASN*     3.1    35.2    -      -       -      +
     23B  THR      3.5    12.2    +      -       -      -
     24B  THR*     5.0     7.6    +      -       -      +
     25B  THR*     5.4    17.5    -      -       +      +
     45B  THR*     1.3    80.0    +      -       -      +
     47B  GLU*     1.3    64.5    +      -       -      +
     49B  LEU*     3.3    11.2    +      -       +      +
     50B  PHE*     2.9    23.6    +      -       -      +
    106B  TYR*     4.3    14.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 47 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     20B  TYR*     3.2     6.0    +      -       -      +
     45B  THR*     3.1    16.7    +      -       +      +
     46B  LYS*     1.3    78.1    -      -       -      +
     48B  ASN*     1.3    55.6    +      -       -      +
     50B  PHE*     3.1     2.3    +      -       -      +
     51B  LEU*     2.5    39.5    +      -       +      +
    102B  PHE*     3.8    12.8    -      -       +      -
    106B  TYR*     2.8    61.2    -      -       +      +
    109B  THR*     3.2    13.4    +      -       -      -
    111B  SER*     3.2    32.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 48 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     42B  HIS      4.6     6.8    +      -       -      +
     43B  PHE*     4.4     3.8    -      -       -      -
     44B  LYS*     4.0    29.7    -      -       -      +
     45B  THR*     2.9    32.9    +      -       -      +
     47B  GLU*     1.3    72.9    -      -       -      +
     49B  LEU*     1.3    67.8    +      -       -      +
     51B  LEU*     4.0     5.6    -      -       -      +
     52B  GLU*     2.7    29.2    +      -       +      +
    114B  GLU*     5.3     6.5    +      -       -      +
    115B  LYS*     5.0    17.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 49 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      7B  ILE*     4.7     6.5    -      -       +      -
      8B  LEU*     4.1    11.4    -      -       +      -
     11B  ALA*     3.7    14.6    -      -       +      -
     15B  PHE*     4.5     9.2    -      -       +      -
     28B  ILE*     3.3    33.2    -      -       +      -
     39B  LEU*     6.5     0.2    -      -       +      -
     43B  PHE*     3.7    45.3    -      -       +      +
     45B  THR      3.1     7.8    +      -       -      +
     46B  LYS*     3.6    12.3    -      -       +      +
     48B  ASN*     1.3    78.0    -      -       -      +
     50B  PHE*     1.3    58.5    +      -       -      +
     52B  GLU*     3.3     5.0    -      -       -      +
     53B  ILE*     2.8    48.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 50 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     15B  PHE*     3.2    44.9    -      +       +      -
     20B  TYR*     3.4    16.2    -      +       +      -
     46B  LYS      2.9    13.9    +      -       -      +
     47B  GLU      3.3     6.1    -      -       -      +
     49B  LEU*     1.3    73.5    -      -       -      +
     51B  LEU*     1.3    55.3    +      -       -      +
     52B  GLU      2.6    15.4    +      -       -      -
     53B  ILE*     2.9    15.1    +      -       +      +
     54B  LEU*     2.9    47.8    +      -       +      +
     95B  LEU*     5.4     3.6    -      -       +      -
     98B  ALA*     3.8    27.1    -      -       +      -
     99B  ILE*     3.8    10.5    -      -       +      -
    102B  PHE*     3.1    49.6    -      +       +      -
----------------------------------------------------------
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Residues in contact with LEU 51 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     47B  GLU      2.5    21.4    +      -       -      +
     48B  ASN*     4.0     4.7    -      -       -      +
     50B  PHE*     1.3    74.1    -      -       -      +
     52B  GLU*     1.3    58.8    +      -       -      +
     54B  LEU*     3.5    16.4    -      -       +      +
     55B  ASN      3.6     0.2    +      -       -      -
    102B  PHE*     3.5    31.9    -      -       +      -
    111B  SER*     4.5     5.2    -      -       -      +
    114B  GLU*     4.9     2.9    -      -       -      +
    115B  LYS*     3.9    15.9    -      -       +      -
    116B  MET*     3.5    54.7    -      -       +      +
    118B  LYS*     3.6    18.1    +      -       -      +
    119B  LEU*     3.8    16.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 52 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8B  LEU*     4.2    12.9    -      -       +      +
     42B  HIS      6.1     0.7    -      -       -      +
     43B  PHE*     5.1     8.7    -      -       +      -
     48B  ASN      2.7    22.9    +      -       -      +
     49B  LEU*     3.3     7.0    -      -       -      +
     50B  PHE      2.6     4.6    +      -       -      -
     51B  LEU*     1.3    67.7    -      -       -      +
     53B  ILE*     1.3    66.4    +      -       -      +
     54B  LEU      3.0     2.4    +      -       -      -
     55B  ASN*     3.3     7.7    +      -       -      +
     56B  ILE*     3.1    50.5    +      -       +      +
    115B  LYS*     2.7    39.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 53 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8B  LEU*     4.0    23.1    -      -       +      +
     11B  ALA*     3.4    32.8    -      -       +      -
     12B  LYS*     3.8    29.8    -      -       +      +
     15B  PHE*     3.7    19.3    -      -       +      -
     49B  LEU*     2.8    30.0    +      -       +      +
     50B  PHE*     2.9     6.6    +      -       +      +
     52B  GLU*     1.3    72.2    -      -       -      +
     54B  LEU*     1.3    67.0    +      -       +      +
     56B  ILE*     3.3    13.4    +      -       +      +
     57B  GLU*     3.0    31.0    +      -       +      +
     95B  LEU*     5.4     5.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 54 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     50B  PHE*     2.9    55.0    +      -       +      +
     51B  LEU*     3.5    28.7    -      -       +      +
     52B  GLU      3.0     0.2    -      -       -      -
     53B  ILE*     1.3    81.1    -      -       +      +
     55B  ASN*     1.3    66.3    +      -       -      +
     57B  GLU*     2.9     5.3    +      -       -      +
     58B  GLU*     2.9    20.6    +      -       -      +
     92B  TYR*     4.0     6.7    -      -       +      -
     95B  LEU*     4.1    14.8    -      -       +      -
     99B  ILE*     3.6    25.8    -      -       +      -
    116B  MET*     4.1    12.1    -      -       +      -
    119B  LEU*     3.4    22.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 55 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     51B  LEU      3.6     0.4    +      -       -      +
     52B  GLU*     3.3     8.8    +      -       -      +
     54B  LEU*     1.3    78.5    -      -       -      +
     56B  ILE*     1.3    70.6    +      -       -      +
     58B  GLU*     3.0     1.9    +      -       -      +
     59B  SER*     2.8    29.4    +      -       -      -
    115B  LYS*     5.1     3.7    -      -       -      +
    118B  LYS*     2.8    49.5    -      -       -      +
    119B  LEU*     3.5    15.0    -      -       -      +
    122B  LYS*     2.8    32.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 56 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8B  LEU*     4.0    30.3    -      -       +      -
     52B  GLU*     3.1    35.3    +      -       -      +
     53B  ILE*     3.4    18.6    -      -       +      +
     55B  ASN*     1.3    84.7    -      -       -      +
     57B  GLU*     1.3    65.2    +      -       +      +
     59B  SER*     2.9    23.2    +      -       -      -
     60B  LYS*     3.2    21.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 57 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     12B  LYS*     2.6    40.5    +      -       +      +
     16B  ILE*     6.0     1.1    -      -       -      +
     53B  ILE*     3.4    21.9    -      -       +      +
     54B  LEU*     2.9    11.8    +      -       -      +
     56B  ILE*     1.3    77.1    -      -       +      +
     58B  GLU*     1.3    66.5    +      -       -      +
     59B  SER      2.9     2.7    +      -       -      -
     60B  LYS*     3.0    25.9    +      -       -      +
     61B  TRP*     3.1    12.5    +      -       -      +
     90B  GLU      4.4     0.9    -      -       -      +
     91B  TYR*     3.4    28.4    -      -       -      +
     92B  TYR*     3.9    21.8    +      -       +      +
     95B  LEU*     4.9    10.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 58 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     54B  LEU      2.9     5.8    +      -       -      +
     55B  ASN      3.4     8.1    -      -       -      +
     57B  GLU*     1.3    75.4    -      -       -      +
     59B  SER*     1.3    56.2    +      -       -      +
     61B  TRP*     3.2    13.2    +      -       +      +
     62B  GLN*     2.9    39.3    +      -       -      +
     82B  TYR*     5.2     1.0    +      -       -      -
     92B  TYR*     3.4    44.0    -      -       +      -
    119B  LEU*     3.6    20.9    -      -       +      -
    122B  LYS*     3.0    26.5    -      -       +      +
    123B  TYR*     3.4    26.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 59 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     55B  ASN*     2.8    17.6    +      -       -      -
     56B  ILE*     2.9    12.8    +      -       -      -
     58B  GLU*     1.3    77.2    -      -       -      +
     60B  LYS*     1.3    58.4    +      -       -      +
     61B  TRP      2.9     1.6    -      -       -      -
     62B  GLN*     3.7     6.0    -      -       -      +
     63B  GLU*     2.8    31.4    +      -       -      +
    122B  LYS*     2.9    24.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 60 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     12B  LYS*     6.1     0.4    -      -       -      +
     56B  ILE*     3.4    25.6    -      -       +      +
     57B  GLU*     3.6    25.1    -      -       -      +
     59B  SER*     1.3    75.4    -      -       -      +
     61B  TRP*     1.3    56.9    +      -       -      +
     63B  GLU*     3.7     7.5    +      -       -      +
     64B  GLN*     3.0    26.5    +      -       -      +
     91B  TYR*     3.3    37.2    +      -       +      -
    199B  SO4      2.7    33.0    +      -       -      -
   1000B  SO4      4.7     6.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with TRP 61 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     57B  GLU      3.1    10.5    +      -       -      +
     58B  GLU*     3.2    31.4    +      -       +      +
     60B  LYS*     1.3    73.7    -      -       -      +
     62B  GLN*     1.3    66.9    +      -       -      +
     63B  GLU      3.0     1.1    -      -       -      -
     64B  GLN*     2.9    12.3    +      -       +      -
     65B  TRP*     2.7    43.9    +      +       +      -
     82B  TYR*     3.0    53.5    +      +       -      -
     85B  LEU*     3.8    25.4    -      -       +      -
     86B  SER*     3.9    17.7    -      -       -      -
     89B  THR*     3.1    40.6    -      -       +      -
     91B  TYR*     3.7    19.7    -      -       +      +
     92B  TYR*     4.6     2.7    -      +       +      -
     93B  TYR*     3.9    20.3    -      +       -      -
----------------------------------------------------------
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Residues in contact with GLN 62 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     58B  GLU*     2.9    35.3    +      -       -      +
     59B  SER*     3.8     7.2    -      -       -      +
     61B  TRP*     1.3    81.6    +      -       -      +
     63B  GLU*     1.3    60.4    +      -       -      +
     65B  TRP*     3.5     9.0    -      -       -      +
     66B  LYS*     3.2    58.4    +      -       +      +
     82B  TYR*     5.0     1.2    +      -       -      -
    122B  LYS*     3.3    29.8    -      -       +      +
    125B  ASP*     4.3     6.8    +      -       -      +
    126B  ALA*     3.4    29.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 63 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     59B  SER      2.8    18.4    +      -       -      +
     60B  LYS*     3.7     8.0    -      -       -      +
     62B  GLN*     1.3    76.0    -      -       -      +
     64B  GLN*     1.3    65.6    +      -       -      +
     66B  LYS*     3.1     9.4    +      -       +      +
     67B  LYS*     3.1    40.5    +      -       +      +
   1000B  SO4      5.1     2.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 64 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     60B  LYS      3.0    15.7    +      -       -      +
     61B  TRP*     2.9    10.5    +      -       +      +
     63B  GLU*     1.3    75.8    -      -       -      +
     65B  TRP*     1.3    66.9    +      -       -      +
     67B  LYS*     3.1    12.2    +      -       -      +
     68B  GLU*     2.9    52.0    -      -       +      +
     85B  LEU*     4.3     7.6    -      -       -      +
     88B  THR*     5.3     0.3    +      -       -      -
     89B  THR*     3.0    36.0    +      -       +      +
     90B  GLU*     3.8     6.7    +      -       -      -
     91B  TYR*     3.4     9.9    -      -       -      -
   1000B  SO4      2.9    35.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with TRP 65 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     61B  TRP*     2.7    39.6    +      +       +      +
     62B  GLN*     3.5    17.3    -      -       -      +
     64B  GLN*     1.3    75.1    -      -       -      +
     66B  LYS*     1.3    88.5    +      -       +      +
     68B  GLU*     3.2     5.3    +      -       +      -
     69B  GLN*     2.9    69.1    +      -       +      +
     78B  LYS*     3.6    32.1    -      -       +      -
     81B  LEU*     4.0    11.9    -      -       +      -
     82B  TYR*     3.6    38.8    -      +       +      -
     85B  LEU*     4.9     5.4    -      -       +      -
    126B  ALA*     3.8    15.0    +      -       +      +
    130B  ILE*     4.4    13.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 66 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     62B  GLN*     3.2    40.7    +      -       +      +
     63B  GLU*     3.1    10.9    +      -       +      +
     64B  GLN      3.1     0.6    -      -       -      -
     65B  TRP*     1.3    91.4    -      -       +      +
     67B  LYS*     1.3    55.9    +      -       +      +
     68B  GLU      2.5    18.3    +      -       -      -
     69B  GLN*     3.0    35.8    +      -       -      +
     70B  ILE*     3.6    10.5    -      -       -      +
    125B  ASP*     4.6     6.7    +      -       -      -
    126B  ALA*     4.5     7.1    -      -       -      +
    129B  VAL*     5.1     6.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 67 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63B  GLU*     3.1    31.4    +      -       +      +
     64B  GLN*     3.1     6.2    +      -       -      +
     66B  LYS*     1.3    77.1    -      -       +      +
     68B  GLU*     1.3    66.6    +      -       +      +
     70B  ILE*     5.1     6.9    -      -       -      +
     71B  LYS*     4.9     5.9    +      -       -      -
   1000B  SO4      3.2    34.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 68 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     64B  GLN*     2.9    44.7    -      -       +      +
     65B  TRP*     3.8     8.3    -      -       +      +
     66B  LYS      2.5    14.6    +      -       -      -
     67B  LYS*     1.3    81.8    -      -       +      +
     69B  GLN*     1.3    53.5    +      -       -      +
     70B  ILE*     2.7    17.4    +      -       -      +
     71B  LYS*     3.1    27.7    +      -       -      +
     81B  LEU*     4.1     5.9    -      -       -      +
     85B  LEU*     3.3    35.9    -      -       +      +
   1000B  SO4      5.4     2.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 69 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65B  TRP*     2.9    51.2    +      -       +      +
     66B  LYS*     3.0    58.5    +      -       -      +
     68B  GLU*     1.3    74.6    -      -       -      +
     70B  ILE*     1.3    59.6    +      -       +      +
     71B  LYS      3.0     0.2    -      -       -      -
     72B  ALA*     2.8    38.0    +      -       -      +
     78B  LYS*     3.6    26.3    +      -       +      -
     81B  LEU*     4.0     4.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 70 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     66B  LYS      3.6    18.6    -      -       -      +
     67B  LYS*     5.1     4.5    -      -       -      +
     68B  GLU*     2.7     6.4    +      -       -      +
     69B  GLN*     1.3    83.8    -      -       +      +
     71B  LYS*     1.3    71.3    +      -       +      +
     72B  ALA      3.1     8.3    +      -       -      +
     73B  LYS*     3.9     6.6    +      -       -      -
     78B  LYS*     5.7     0.7    -      -       -      +
----------------------------------------------------------
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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