Contacts of the helix formed by residues 46 - 74 (chain B) in PDB entry 2J3R


Residue contacts within the protein are derived with the CSU software (Sobolev V., Sorokine A., Prilusky J., Abola E.E. and Edelman M. (1999) Automated analysis of interatomic contacts in proteins. Bioinformatics, 15, 327-332). A short description of the analytical approach is given at the end of the page.
For CSU analysis of other PDB entry

Note:
Non-standard 3 letter residue codes indicate a heterogroup. To identify and analyse, use LPC software

Legend:
Dist - nearest distance (Å) between atoms of two residues
Surf - contact surface area (Å2) between two residues
HB   - hydrophilic-hydrophilic contact (hydrogen bond)
Arom - aromatic-aromatic contact
Phob - hydrophobic-hydrophobic contact
DC   - hydrophobic-hydrophilic contact (destabilizing contact)
+/-  - indicates presence/absence of a specific contacts
*    - indicates residues forming contacts  by their side chain
       (including CA atoms)
Residues in contact with SER 46 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     44B  VAL*     3.1    10.3    -      -       -      +
     45B  TYR*     1.3    80.6    -      -       -      +
     47B  VAL*     1.3    67.1    +      -       -      +
     48B  SER*     3.1    19.5    +      -       -      -
     49B  GLU*     3.1    18.1    +      -       -      +
     50B  LEU      3.0    17.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 47 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46B  SER*     1.3    71.3    +      -       -      +
     48B  SER*     1.3    67.7    +      -       -      +
     50B  LEU*     3.0    17.7    +      -       +      +
     51B  GLN*     3.0    44.9    +      -       +      +
    136B  THR*     6.4     1.6    -      -       -      -
    138B  ASN*     5.0     5.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 48 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46B  SER*     3.1    12.8    +      -       -      -
     47B  VAL*     1.3    80.2    -      -       -      +
     49B  GLU*     1.3    60.9    +      -       -      +
     51B  GLN*     3.6    11.2    +      -       -      +
     52B  ALA*     3.2    19.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 49 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     43B  ARG      5.3     0.3    -      -       -      +
     44B  VAL*     3.4    24.0    -      -       +      +
     45B  TYR*     3.4    38.6    +      -       -      +
     46B  SER*     3.1    15.7    +      -       -      +
     48B  SER*     1.3    77.4    -      -       -      +
     50B  LEU*     1.3    65.9    +      -       -      +
     52B  ALA*     3.2     8.0    +      -       +      +
     53B  ARG*     3.0    21.1    +      -       -      +
----------------------------------------------------------
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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
----------------------------------------------------------
     37B  VAL*     3.7    22.0    -      -       +      +
     40B  CYS*     3.2    32.1    -      -       +      -
     41B  GLN*     3.8    30.1    -      -       +      +
     44B  VAL*     3.8    12.1    -      -       +      +
     46B  SER      3.0    12.8    +      -       -      +
     47B  VAL*     3.3    21.5    -      -       +      +
     49B  GLU*     1.3    76.4    -      -       -      +
     51B  GLN*     1.3    57.4    +      -       -      +
     53B  ARG*     3.2     5.0    +      -       -      +
     54B  LEU*     3.0    34.9    +      -       +      +
    138B  ASN*     4.0    17.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 51 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     47B  VAL*     3.0    32.5    +      -       +      +
     48B  SER*     3.8     8.6    -      -       -      +
     50B  LEU*     1.3    74.9    -      -       -      +
     52B  ALA*     1.3    57.5    +      -       -      +
     54B  LEU*     3.3     5.1    +      -       -      -
     55B  ALA*     2.8    30.9    +      -       -      +
    136B  THR*     5.7     0.3    -      -       -      -
    137B  LEU*     3.6    33.9    +      -       -      +
    138B  ASN*     3.8    16.3    -      -       -      +
    141B  ALA*     3.4    19.7    -      -       +      +
    162B  VAL*     4.1    20.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 52 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48B  SER      3.2    11.3    +      -       -      +
     49B  GLU*     3.2    13.1    +      -       +      +
     50B  LEU      3.2     0.4    -      -       -      -
     51B  GLN*     1.3    78.6    -      -       -      +
     53B  ARG*     1.3    59.2    +      -       +      +
     55B  ALA*     3.4     8.0    +      -       -      +
     56B  ASP*     2.9    34.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 53 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29A  GLN*     4.2     8.8    +      -       -      +
     33A  ASP*     3.7    23.4    +      -       -      -
     39B  TYR*     4.5     6.3    -      -       -      -
     40B  CYS*     4.0    27.7    -      -       +      -
     43B  ARG*     3.2    51.8    +      -       -      +
     44B  VAL*     3.8    20.3    -      -       +      +
     49B  GLU      3.0    12.7    +      -       -      +
     50B  LEU      3.2     8.9    +      -       -      +
     52B  ALA*     1.3    75.8    -      -       +      +
     54B  LEU*     1.3    64.9    +      -       -      +
     56B  ASP*     3.0    23.2    +      -       -      +
     57B  MET*     3.0    19.7    +      -       -      +
----------------------------------------------------------
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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
----------------------------------------------------------
     33B  PHE*     4.2    19.3    -      -       +      -
     36B  MET*     4.5     3.6    -      -       +      +
     37B  VAL*     4.3    16.2    -      -       +      +
     40B  CYS*     4.0    17.3    -      -       -      -
     50B  LEU*     3.0    29.5    +      -       +      +
     51B  GLN*     3.6     8.3    -      -       -      +
     53B  ARG*     1.3    74.4    -      -       -      +
     55B  ALA*     1.3    64.6    +      -       -      +
     57B  MET*     3.1    14.5    +      -       -      +
     58B  GLY      3.0    17.8    +      -       -      -
    138B  ASN*     3.5    48.0    -      -       +      +
    142B  PHE*     3.3    25.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 55 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     51B  GLN      2.8    18.2    +      -       -      +
     52B  ALA*     3.6     9.0    -      -       -      +
     54B  LEU*     1.3    76.0    -      -       -      +
     56B  ASP*     1.3    59.0    +      -       -      +
     58B  GLY      3.3     0.9    +      -       -      -
     59B  GLN*     3.0    33.2    +      -       -      +
    141B  ALA*     3.4    25.5    +      -       +      +
    142B  PHE*     4.1     1.1    -      -       -      +
    144B  GLY      5.3     0.2    -      -       -      -
    145B  GLY*     3.3    14.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 56 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29A  GLN*     4.2    19.5    +      -       -      +
     32A  LYS*     5.7     1.0    +      -       -      -
     52B  ALA*     2.9    20.3    +      -       -      +
     53B  ARG*     3.0    19.5    +      -       +      +
     55B  ALA*     1.3    74.9    -      -       -      +
     57B  MET*     1.3    66.8    +      -       -      +
     58B  GLY      3.2     0.2    +      -       -      -
     59B  GLN*     3.2    16.2    +      -       -      +
     60B  GLY*     3.1    18.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with MET 57 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     25A  ALA*     3.4    24.7    -      -       +      +
     26A  LEU*     3.8    31.2    -      -       +      -
     29A  GLN*     3.2    39.0    -      -       +      -
     36B  MET*     3.8    22.0    -      -       +      -
     39B  TYR*     4.2    18.2    -      -       +      -
     40B  CYS*     3.7    22.9    -      -       -      -
     53B  ARG*     3.0    14.4    +      -       -      +
     54B  LEU*     3.1    17.2    +      -       -      +
     56B  ASP*     1.3    76.1    -      -       -      +
     58B  GLY*     1.3    62.1    +      -       -      +
     60B  GLY*     3.3     9.8    +      -       -      -
     61B  VAL      3.8     4.0    +      -       -      -
    142B  PHE*     3.9    11.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 58 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     54B  LEU      3.0     9.9    +      -       -      -
     55B  ALA      3.6     1.1    -      -       -      -
     56B  ASP      3.1     0.4    -      -       -      -
     57B  MET*     1.3    77.6    -      -       -      +
     59B  GLN*     1.3    61.2    +      -       -      +
     61B  VAL*     3.2     5.9    +      -       -      +
     62B  GLY      3.1    17.2    +      -       -      -
    142B  PHE*     3.5    36.0    -      -       -      -
    146B  ILE*     3.5    20.3    -      -       -      +
----------------------------------------------------------
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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
----------------------------------------------------------
     55B  ALA*     3.0    25.3    +      -       -      +
     56B  ASP*     3.2    16.0    +      -       -      +
     58B  GLY*     1.3    75.0    -      -       -      +
     60B  GLY*     1.3    62.6    -      -       -      +
     61B  VAL      3.3     0.7    +      -       -      -
     62B  GLY      3.5     1.1    +      -       -      -
     63B  ALA*     4.5     1.9    +      -       -      +
    145B  GLY*     2.9    28.0    +      -       -      +
    148B  GLU*     2.9    37.5    +      -       +      +
    149B  ALA*     3.3    25.9    +      -       +      +
    152B  THR*     5.5     1.9    +      -       -      +
    153B  HIS*     5.5     2.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 60 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     28A  THR*     4.8    12.8    -      -       -      +
     32A  LYS*     4.8    15.7    -      -       -      -
     56B  ASP      3.1    12.8    +      -       -      -
     57B  MET*     3.3     5.8    +      -       -      -
     58B  GLY      3.1     1.0    -      -       -      -
     59B  GLN*     1.3    78.3    -      -       -      +
     61B  VAL*     1.3    63.1    +      -       -      +
     63B  ALA*     5.1     4.2    +      -       -      +
     64B  SER*     5.5     0.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 61 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     21A  LEU*     3.5    39.0    -      -       +      +
     24A  GLY      3.9     6.7    -      -       -      +
     25A  ALA*     3.6    37.5    -      -       +      +
     28A  THR*     4.4     5.6    -      -       -      +
    116A  VAL*     3.9    17.7    -      -       +      -
     57B  MET      3.9     6.5    -      -       -      +
     58B  GLY*     3.5    13.9    -      -       -      +
     60B  GLY*     1.3    79.1    -      -       -      +
     62B  GLY*     1.3    66.1    +      -       -      +
     63B  ALA      3.2     2.7    -      -       -      -
     64B  SER*     3.2    18.7    +      -       -      +
     65B  LEU*     3.3     8.0    +      -       -      +
    142B  PHE*     5.1     0.4    -      -       +      -
    146B  ILE*     4.6     2.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 62 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     58B  GLY      3.1    11.3    +      -       -      -
     59B  GLN      3.5     3.4    +      -       -      -
     61B  VAL*     1.3    75.9    -      -       -      +
     63B  ALA*     1.3    63.0    +      -       -      +
     65B  LEU*     3.1     5.1    +      -       -      +
     66B  LEU      3.0    17.3    +      -       -      -
    146B  ILE*     3.8    22.9    -      -       -      -
    149B  ALA*     3.6    19.1    -      -       -      -
    150B  ILE*     3.5    12.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 63 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     59B  GLN      4.5     1.9    +      -       -      +
     60B  GLY      5.5     3.6    -      -       -      +
     61B  VAL      3.2     0.8    -      -       -      -
     62B  GLY*     1.3    76.4    -      -       -      +
     64B  SER*     1.3    62.1    +      -       -      +
     66B  LEU*     3.0    17.9    +      -       +      +
     67B  ASP*     3.0    23.3    +      -       -      +
     78B  ARG*     6.2     1.3    -      -       -      +
    149B  ALA*     3.9     6.8    -      -       -      +
    153B  HIS*     3.9    39.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 64 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    115A  PHE*     4.0    21.7    +      -       -      -
    116A  VAL*     4.2    22.3    -      -       -      +
    117A  GLU      4.4     8.0    +      -       -      -
     60B  GLY      5.5     0.5    +      -       -      -
     61B  VAL*     3.2    15.9    +      -       -      +
     63B  ALA*     1.3    77.8    -      -       -      +
     65B  LEU*     1.3    62.2    +      -       -      +
     67B  ASP*     3.4     6.7    +      -       -      +
     68B  VAL*     3.1    30.9    +      -       -      +
----------------------------------------------------------
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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
----------------------------------------------------------
     17A  GLU*     4.9     6.1    -      -       +      +
     21A  LEU*     4.6    11.7    -      -       +      -
    115A  PHE*     4.3    22.4    -      -       +      -
     61B  VAL      3.3     6.8    +      -       -      +
     62B  GLY*     3.1    10.4    +      -       -      +
     64B  SER*     1.3    77.7    -      -       -      +
     66B  LEU*     1.3    64.9    +      -       -      +
     68B  VAL*     4.6     3.8    -      -       +      +
     69B  LEU*     3.1    48.9    +      -       +      +
     93B  VAL*     4.0    20.0    -      -       +      +
     96B  ALA*     4.7     7.4    -      -       +      -
     97B  LEU*     3.9    34.8    -      -       +      -
    146B  ILE*     4.1    12.3    -      -       +      -
    150B  ILE*     4.1     4.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 66 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     62B  GLY      3.0    13.2    +      -       -      +
     63B  ALA*     3.0    11.2    +      -       -      +
     65B  LEU*     1.3    77.5    -      -       -      +
     67B  ASP*     1.3    58.6    +      -       -      +
     69B  LEU*     4.1     0.5    -      -       -      +
     70B  VAL*     2.9    49.1    +      -       +      +
     78B  ARG*     3.6    37.9    -      -       +      +
     85B  ILE*     5.6     1.3    -      -       +      -
     88B  PHE*     3.7    22.7    -      -       +      -
    150B  ILE*     4.0    24.6    -      -       +      +
    153B  HIS*     4.2    10.5    -      -       +      +
    154B  SER*     3.4    27.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 67 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63B  ALA*     3.0    21.0    +      -       -      +
     64B  SER*     4.0     6.5    -      -       -      +
     66B  LEU*     1.3    74.4    -      -       -      +
     68B  VAL*     1.3    65.4    +      -       +      +
     70B  VAL*     4.5     3.4    -      -       -      -
     71B  MET*     3.1    35.3    +      -       +      +
     78B  ARG*     2.7    32.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 68 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     17A  GLU*     5.0     0.7    -      -       -      +
    115A  PHE*     3.5    44.2    -      -       +      +
     64B  SER      3.1    19.0    +      -       -      +
     65B  LEU*     4.2     5.6    -      -       +      +
     67B  ASP*     1.3    77.3    -      -       +      +
     69B  LEU*     1.3    60.6    +      -       +      +
     71B  MET*     4.5     2.7    -      -       -      +
     72B  ARG*     3.0    62.4    +      -       +      +
----------------------------------------------------------
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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
----------------------------------------------------------
     17A  GLU*     5.7     0.2    -      -       -      +
     65B  LEU*     3.1    35.8    +      -       +      +
     68B  VAL*     1.3    73.9    -      -       +      +
     70B  VAL*     1.3    59.3    +      -       -      +
     72B  ARG*     3.5    27.1    -      -       -      +
     73B  GLU*     2.7    55.0    +      -       -      +
     74B  LYS*     3.5     1.4    +      -       -      +
     88B  PHE*     3.5    18.6    -      -       +      -
     92B  ASN      3.7     7.6    -      -       -      +
     93B  VAL*     3.7    42.8    -      -       +      +
     96B  ALA*     3.8    17.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 70 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     66B  LEU*     2.9    43.4    +      -       +      +
     67B  ASP*     3.9     5.4    -      -       -      +
     69B  LEU*     1.3    77.2    -      -       -      +
     71B  MET*     1.3    63.8    +      -       +      +
     74B  LYS*     2.8    30.9    +      -       +      -
     76B  GLY*     3.0    41.0    +      -       -      +
     77B  LYS      3.6    15.0    -      -       -      +
     78B  ARG*     4.2    21.1    -      -       +      +
     88B  PHE*     4.1     8.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 71 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     67B  ASP*     3.1    22.4    +      -       +      +
     68B  VAL*     4.5     2.5    -      -       -      +
     70B  VAL*     1.3    80.4    -      -       +      +
     72B  ARG*     1.3    60.2    +      -       -      +
     75B  ASN*     4.7     4.5    +      -       -      -
     76B  GLY*     3.1    43.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 72 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     17A  GLU*     3.2    35.6    +      -       -      +
    115A  PHE*     5.2     0.8    -      -       -      -
     21B  LYS*     6.6     0.7    -      -       -      +
     68B  VAL*     3.0    44.1    +      -       +      +
     69B  LEU*     3.5    21.5    -      -       -      +
     71B  MET*     1.3    80.0    -      -       +      +
     73B  GLU*     1.3    80.9    +      -       +      +
     74B  LYS      3.8     0.2    -      -       -      -
     75B  ASN      5.1     0.7    -      -       -      -
     96B  ALA*     4.8     6.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 73 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     69B  LEU*     2.7    47.2    +      -       -      +
     72B  ARG*     1.3   101.5    +      -       -      +
     74B  LYS*     1.3    68.6    +      -       +      +
     75B  ASN*     3.7     5.7    -      -       -      +
     92B  ASN*     3.3    34.4    -      -       -      +
     96B  ALA*     5.5     1.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 74 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     69B  LEU      3.5     0.9    +      -       -      +
     70B  VAL*     2.8    17.7    +      -       +      +
     73B  GLU*     1.3    86.3    -      -       -      +
     75B  ASN*     1.3    61.5    +      -       -      +
     76B  GLY      2.8    15.7    +      -       -      -
     77B  LYS*     2.9    31.6    +      -       -      +
     79B  GLU*     3.7    23.7    +      -       +      +
     84B  ASN      5.9     0.4    +      -       -      -
     88B  PHE*     4.0    25.8    -      -       +      -
     92B  ASN*     4.0    26.4    -      -       -      +
----------------------------------------------------------
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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