Contacts of the helix formed by residues 44 - 72 (chain B) in PDB entry 2RBD


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 44 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     42B  THR*     3.1     8.2    -      -       -      +
     43B  GLY*     1.3    75.0    -      -       -      +
     45B  GLU*     1.3    59.7    +      -       -      +
     46B  ASP*     2.9    18.3    +      -       -      +
     47B  LEU*     2.9    27.3    +      -       +      +
     48B  LYS      3.0    21.3    +      -       -      -
     99B  ASP*     3.1    22.6    +      -       -      +
    154B  LYS*     2.7    33.4    +      -       -      +
    156B  TRP*     4.2    14.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 45 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     42B  THR      4.1     7.8    -      -       -      +
     43B  GLY      3.0    22.8    +      -       -      +
     44B  ASP*     1.3    72.6    +      -       -      +
     46B  ASP*     1.3    61.7    +      -       -      +
     47B  LEU      3.3     0.2    -      -       -      -
     48B  LYS*     3.7    29.2    -      -       -      +
     49B  ASN*     3.0    41.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 46 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     44B  ASP*     2.9     6.2    +      -       -      +
     45B  GLU*     1.3    75.9    -      -       -      +
     47B  LEU*     1.3    64.9    +      -       -      +
     49B  ASN*     3.4     9.9    +      -       -      +
     50B  LEU*     3.3    26.9    +      -       +      +
    150B  LEU*     3.8    20.0    -      -       +      -
    154B  LYS*     2.6    25.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 47 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     42B  THR*     4.1     4.5    -      -       +      -
     44B  ASP*     2.9    20.9    +      -       +      +
     46B  ASP*     1.3    76.3    -      -       -      +
     48B  LYS*     1.3    63.6    +      -       -      +
     50B  LEU*     3.0     4.4    +      -       -      +
     51B  ILE*     3.0    43.1    +      -       +      +
     99B  ASP*     3.5    48.7    -      -       +      +
    102B  ILE*     4.1    13.2    -      -       +      -
    103B  SER*     4.3    12.8    -      -       -      -
    106B  ILE*     4.6     1.3    -      -       +      -
    147B  MSE      4.3    11.9    -      -       +      -
    150B  LEU*     3.8    27.7    -      -       +      +
    156B  TRP*     4.1     6.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 48 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     39B  ILE*     3.9    32.1    -      -       +      +
     42B  THR*     3.7    15.0    -      -       +      +
     44B  ASP      3.0    17.3    +      -       -      +
     45B  GLU*     3.7    28.3    -      -       -      +
     46B  ASP      3.4     0.2    -      -       -      -
     47B  LEU*     1.3    76.8    -      -       -      +
     49B  ASN*     1.3    70.4    +      -       -      +
     51B  ILE*     3.2     8.5    +      -       -      +
     52B  ASP*     2.6    52.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 49 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45B  GLU*     3.0    29.4    +      -       -      +
     46B  ASP*     3.8    10.9    +      -       -      +
     47B  LEU      3.2     0.2    -      -       -      -
     48B  LYS*     1.3    83.1    +      -       -      +
     50B  LEU*     1.3    60.2    +      -       +      +
     52B  ASP*     3.4    16.0    +      -       -      +
     53B  GLU*     3.1    25.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 50 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46B  ASP      3.3     9.5    +      -       -      +
     47B  LEU*     3.0     8.5    +      -       +      +
     49B  ASN*     1.3    76.7    -      -       +      +
     51B  ILE*     1.3    59.3    +      -       -      +
     53B  GLU*     3.2    23.8    +      -       -      +
     54B  ALA      2.9    24.1    +      -       -      -
    143B  PHE*     3.4    21.4    -      -       +      -
    146B  LYS*     3.7    37.5    -      -       +      +
    147B  MSE      4.1    20.0    -      -       -      -
    150B  LEU*     3.7    40.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 51 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     35B  TYR*     3.6    43.5    -      -       +      +
     38B  PHE*     4.2     7.4    -      -       +      -
     39B  ILE*     3.6    16.6    -      -       +      -
     42B  THR*     3.4    25.1    -      -       -      +
     47B  LEU*     3.0    22.8    +      -       +      +
     48B  LYS*     3.6     6.7    -      -       -      +
     50B  LEU*     1.3    75.7    -      -       -      +
     52B  ASP*     1.3    62.3    +      -       -      +
     54B  ALA*     3.2     6.7    +      -       -      +
     55B  ILE*     3.0    22.7    +      -       +      +
    102B  ILE*     3.8    20.6    -      -       +      -
    106B  ILE*     3.5    19.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 52 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     39B  ILE*     3.0    25.4    -      -       -      +
     48B  LYS*     2.6    48.5    +      -       -      +
     49B  ASN*     3.5    14.6    -      -       -      +
     50B  LEU      3.2     0.2    -      -       -      -
     51B  ILE*     1.3    77.9    -      -       -      +
     53B  GLU*     1.3    61.9    +      -       -      +
     55B  ILE*     3.3     6.5    +      -       -      +
     56B  GLN*     3.1    23.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 53 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     49B  ASN      3.1    10.0    +      -       -      +
     50B  LEU*     3.2    18.3    +      -       -      +
     52B  ASP*     1.3    79.1    -      -       -      +
     54B  ALA*     1.3    61.0    -      -       -      +
     56B  GLN*     3.4     6.3    +      -       -      +
     57B  ALA*     3.0    25.5    +      -       +      +
    143B  PHE*     4.0    22.4    -      -       +      +
    146B  LYS*     2.8    34.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 54 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     35B  TYR*     4.0    24.7    -      -       +      -
     50B  LEU      2.9     8.1    +      -       -      +
     51B  ILE*     3.6     8.7    -      -       -      +
     53B  GLU*     1.3    77.0    -      -       -      +
     55B  ILE*     1.3    61.1    +      -       -      +
     57B  ALA*     3.3     3.4    +      -       -      +
     58B  MSE      3.0    31.0    +      -       -      +
    106B  ILE*     5.2     1.1    -      -       +      -
    143B  PHE*     3.6    26.9    -      -       +      -
    171B  PG4      4.1    16.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 55 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     32B  ILE*     4.2    18.1    -      -       +      +
     35B  TYR*     3.8    17.9    -      -       +      -
     36B  ARG*     3.8    32.5    -      -       +      +
     39B  ILE*     3.6    30.7    -      -       +      -
     51B  ILE      3.0    15.1    +      -       -      +
     52B  ASP*     3.7     7.4    -      -       -      +
     54B  ALA*     1.3    76.6    -      -       -      +
     56B  GLN*     1.3    57.1    +      -       -      +
     58B  MSE      3.3    12.6    +      -       +      +
     59B  GLN*     2.9    50.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 56 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     52B  ASP      3.1    16.7    +      -       -      +
     53B  GLU*     3.9     6.1    -      -       -      +
     55B  ILE*     1.3    76.4    -      -       -      +
     57B  ALA*     1.3    58.1    +      -       -      +
     59B  GLN*     3.2    24.7    +      -       -      +
     60B  ASP*     2.6    64.7    +      -       -      +
     63B  HIS*     5.9     2.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 57 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     53B  GLU*     3.0    20.8    +      -       +      +
     54B  ALA*     3.6     5.4    -      -       -      +
     55B  ILE      3.2     0.2    -      -       -      -
     56B  GLN*     1.3    76.1    -      -       -      +
     58B  MSE      1.3    56.3    +      -       -      +
     60B  ASP*     3.2    12.4    +      -       -      +
     61B  GLU*     3.0    31.9    +      -       -      +
    143B  PHE*     6.2     0.4    -      -       +      -
    171B  PG4      3.7    30.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with MSE 58 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     28B  ASN*     3.8    35.0    -      -       -      +
     31B  LEU*     3.7    26.5    -      -       -      -
     32B  ILE*     3.9    27.1    -      -       +      +
     35B  TYR*     3.5    34.5    -      -       +      -
     54B  ALA*     3.0    25.3    +      -       +      +
     55B  ILE*     3.7     9.0    -      -       -      +
     57B  ALA*     1.3    72.5    -      -       -      +
     59B  GLN*     1.3    61.2    +      -       -      +
     61B  GLU*     3.4     6.4    +      -       -      +
     62B  ASN*     2.9    36.6    +      -       -      +
    140B  LYS*     5.2     0.7    -      -       -      +
    171B  PG4      4.2    22.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 59 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     32B  ILE*     3.8    18.2    -      -       +      +
     36B  ARG*     3.3    28.1    -      -       -      +
     55B  ILE*     2.9    33.2    +      -       -      +
     56B  GLN*     3.2    32.8    +      -       -      +
     58B  MSE      1.3    77.7    -      -       -      +
     60B  ASP*     1.3    62.0    +      -       -      +
     62B  ASN*     3.2     7.9    +      -       -      +
     63B  HIS*     3.1    36.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 60 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     56B  GLN*     2.6    48.7    +      -       -      +
     57B  ALA*     3.2    13.3    +      -       -      +
     59B  GLN*     1.3    74.3    -      -       -      +
     61B  GLU*     1.3    65.8    +      -       +      +
     63B  HIS*     3.4    19.8    +      -       -      +
     64B  GLN*     3.1    23.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 61 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     24B  TYR*     2.8    29.6    +      -       -      -
     28B  ASN*     3.3    13.5    +      -       -      +
     57B  ALA      3.0    17.7    +      -       -      +
     58B  MSE      3.6     8.8    -      -       -      +
     60B  ASP*     1.3    76.1    -      -       +      +
     62B  ASN*     1.3    63.0    +      -       -      +
     64B  GLN*     3.1    13.7    +      -       -      +
     65B  LEU*     2.9    27.1    +      -       +      +
    136B  PHE*     3.5    43.1    -      -       +      +
    139B  ALA*     5.0     0.7    -      -       -      +
    140B  LYS*     4.2     2.4    +      -       -      -
    171B  PG4      2.4    33.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 62 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     25B  LEU*     3.2    22.3    -      -       +      +
     28B  ASN*     2.9    31.8    +      -       -      +
     29B  ASN*     2.9    25.7    +      -       -      -
     32B  ILE*     3.5    23.6    -      -       -      +
     58B  MSE      2.9    16.7    +      -       -      +
     59B  GLN*     3.5     7.4    -      -       -      +
     60B  ASP      3.2     0.2    -      -       -      -
     61B  GLU*     1.3    77.9    -      -       -      +
     63B  HIS*     1.3    57.2    +      -       -      +
     65B  LEU*     3.9     4.2    -      -       -      +
     66B  GLU*     2.8    42.3    +      -       -      +
     80B  PRO*     5.5     0.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 63 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     56B  GLN*     5.9     1.5    +      -       -      -
     59B  GLN*     3.1    32.1    +      -       +      +
     60B  ASP*     3.8    13.9    -      -       -      +
     61B  GLU      3.2     0.4    -      -       -      -
     62B  ASN*     1.3    75.4    -      -       +      +
     64B  GLN*     1.3    63.3    +      -       +      +
     66B  GLU*     4.1    12.7    +      -       -      +
     67B  GLU*     3.1    24.4    +      -       -      +
     70B  ARG*     5.1     1.6    +      -       -      -
----------------------------------------------------------
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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  ASP*     3.1    27.1    +      -       -      +
     61B  GLU*     3.1     6.9    +      -       -      +
     63B  HIS*     1.3    77.9    -      -       +      +
     65B  LEU*     1.3    56.5    +      -       -      +
     67B  GLU*     3.4     5.5    +      -       -      +
     68B  LEU*     3.0    27.2    +      -       -      +
    132B  MSE      4.2    28.5    -      -       +      +
    135B  GLN*     4.9     6.9    -      -       -      +
    136B  PHE*     3.7    26.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 65 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     21B  THR*     4.3    17.9    -      -       +      +
     24B  TYR*     3.6    28.9    -      -       +      -
     25B  LEU*     4.1    21.3    -      -       +      -
     28B  ASN*     4.3     0.2    -      -       -      +
     61B  GLU      2.9    22.0    +      -       -      +
     62B  ASN*     3.3    20.2    +      -       -      +
     64B  GLN*     1.3    75.0    -      -       -      +
     66B  GLU*     1.3    60.4    +      -       -      +
     68B  LEU*     3.3     6.7    +      -       +      +
     69B  LEU*     2.9    36.3    +      -       +      +
    132B  MSE      3.9    15.7    -      -       -      -
    133B  PHE*     3.7    28.9    -      -       +      -
    136B  PHE*     4.1     5.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 66 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     25B  LEU*     3.6    29.4    -      -       +      +
     29B  ASN*     4.8     8.1    +      -       -      +
     62B  ASN*     2.8    26.8    +      -       -      +
     63B  HIS*     4.1    13.7    +      -       -      +
     65B  LEU*     1.3    75.5    -      -       -      +
     67B  GLU*     1.3    57.9    +      -       -      +
     69B  LEU*     3.8     0.3    -      -       -      -
     70B  ARG*     2.9    45.7    +      -       -      +
     76B  LEU*     3.8    32.6    -      -       +      +
     77B  PRO      5.2     3.6    -      -       -      +
     79B  ALA*     5.1    10.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 67 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63B  HIS      3.1    18.6    +      -       -      +
     64B  GLN*     3.7     5.6    -      -       -      +
     65B  LEU      3.2     0.2    -      -       -      -
     66B  GLU*     1.3    75.9    -      -       -      +
     68B  LEU*     1.3    52.2    +      -       -      +
     70B  ARG*     3.0    30.0    +      -       -      +
     71B  SER*     2.7    55.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 68 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     13B  LEU*     4.5    14.1    -      -       +      -
     21B  THR*     4.2    32.1    -      -       +      +
     64B  GLN      3.0    14.7    +      -       -      +
     65B  LEU*     3.6     9.6    -      -       +      +
     67B  GLU*     1.3    76.0    -      -       -      +
     69B  LEU*     1.3    63.7    +      -       +      +
     71B  SER*     2.9     8.8    +      -       -      +
     72B  ASN*     2.7    36.6    +      -       -      +
    126B  ARG*     3.6    27.8    -      -       -      +
    128B  ASP*     4.0     8.3    -      -       -      +
    129B  VAL*     4.3    14.6    -      -       +      -
    132B  MSE      4.5    23.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 69 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     13B  LEU*     5.0     6.5    -      -       +      -
     18B  VAL*     4.4    11.0    -      -       +      +
     21B  THR*     3.4    25.8    -      -       -      +
     22B  TRP*     3.8    33.7    -      -       +      +
     25B  LEU*     3.8    24.5    -      -       +      -
     65B  LEU      2.9    15.9    +      -       -      +
     68B  LEU*     1.3    78.9    -      -       +      +
     70B  ARG*     1.3    65.7    +      -       -      +
     72B  ASN*     3.1     7.9    +      -       -      -
     74B  VAL*     3.0    53.6    +      -       +      +
     76B  LEU*     3.6    15.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 70 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63B  HIS      5.1     0.8    +      -       -      -
     66B  GLU*     2.9    30.9    +      -       -      +
     67B  GLU*     3.0    40.6    +      -       -      +
     69B  LEU*     1.3    72.8    -      -       -      +
     71B  SER*     1.3    63.4    +      -       -      +
     72B  ASN      3.1     1.4    +      -       -      -
     73B  GLY*     3.2    12.3    +      -       -      -
     74B  VAL      4.1     7.4    +      -       -      +
     76B  LEU*     3.7    30.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 71 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    165A  ASP*     5.3     1.7    -      -       -      +
     67B  GLU*     2.7    39.8    +      -       -      +
     68B  LEU*     2.9    15.6    +      -       -      +
     70B  ARG*     1.3    76.1    -      -       -      +
     72B  ASN*     1.3    67.2    +      -       -      +
     73B  GLY      3.5     0.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 72 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    163A  HIS*     2.7    36.4    +      -       +      -
    165A  ASP*     3.3    20.7    -      -       +      +
     11B  GLU      5.0     0.2    -      -       -      +
     12B  PRO*     5.3     1.7    -      -       -      +
     13B  LEU*     3.7    26.4    +      -       +      +
     68B  LEU*     2.7    39.4    +      -       -      +
     69B  LEU      3.1     3.4    +      -       -      +
     70B  ARG      3.1     0.8    -      -       -      -
     71B  SER*     1.3    92.7    +      -       -      +
     73B  GLY*     1.3    53.8    +      -       -      +
     74B  VAL*     3.4     3.4    -      -       +      -
    126B  ARG*     3.3    25.3    +      -       -      +
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


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

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

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