Contacts of the helix formed by residues 47 - 74 (chain A) in PDB entry 3GHG


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 47 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45A  CYS      3.8     2.2    +      -       -      -
     46A  PRO*     1.3    72.3    -      -       -      +
     48A  GLY*     1.3    65.7    +      -       -      +
     49A  CYS*     2.9     6.1    +      -       -      +
     50A  ARG*     3.1    41.7    +      -       -      +
     51A  MET*     3.3     8.4    +      -       -      +
     76B  CYS*     4.0    17.6    -      -       -      -
     22C  THR*     4.7     0.4    -      -       -      -
     47D  SER*     5.4    12.6    -      -       -      +
     74E  VAL      4.5     2.9    +      -       -      -
     76E  CYS*     6.0     6.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 48 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46A  PRO      3.3     3.8    +      -       -      -
     47A  SER*     1.3    70.7    -      -       -      +
     49A  CYS*     1.3    50.8    +      -       -      +
     51A  MET*     3.2     4.1    -      -       -      +
     52A  LYS*     2.3    39.7    +      -       -      +
     76B  CYS*     4.2     5.4    -      -       -      +
     77B  PRO*     3.8    19.2    +      -       -      -
     82B  LEU*     3.3    26.2    -      -       -      +
     22C  THR*     3.9     6.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with CYS 49 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     47A  SER*     3.1     3.8    -      -       -      +
     48A  GLY*     1.3    76.7    -      -       -      +
     50A  ARG*     1.3    58.6    +      -       -      +
     52A  LYS      3.3     0.2    +      -       -      -
     53A  GLY      2.8    12.5    +      -       -      -
     61B  ASP*     4.3     4.3    -      -       -      +
     62B  ALA      2.8    36.4    +      -       -      +
     63B  GLY      4.1    11.0    -      -       -      +
     74B  VAL*     5.4     2.0    -      -       -      -
     75B  LEU      3.7     7.6    -      -       -      -
     76B  CYS*     2.0    53.3    -      -       -      -
     77B  PRO*     3.7     7.7    -      -       -      +
     33D  TRP*     4.8    17.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 50 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46A  PRO*     3.7    23.4    -      -       -      +
     47A  SER*     3.1    27.1    +      -       -      +
     49A  CYS*     1.3    77.2    -      -       -      +
     51A  MET*     1.3    61.2    +      -       -      +
     53A  GLY      3.2     1.2    +      -       -      -
     54A  LEU*     2.9    37.5    +      -       +      +
     59B  ALA*     3.9    11.9    -      -       -      +
     60B  PRO      3.2    12.6    -      -       -      +
     61B  ASP*     3.3    22.3    +      -       -      +
     71E  ASP      3.1    25.1    -      -       -      +
     72E  LEU*     3.8     7.9    -      -       -      +
     73E  GLY*     3.2    26.0    -      -       -      +
     74E  VAL*     3.5    24.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 51 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46A  PRO*     3.7    34.5    -      -       +      +
     47A  SER      3.3    11.6    +      -       -      +
     48A  GLY*     3.1     9.1    +      -       -      +
     50A  ARG*     1.3    76.4    -      -       -      +
     52A  LYS*     1.3    57.6    +      -       -      +
     54A  LEU*     2.9    13.7    +      -       +      +
     55A  ILE*     2.5    44.6    +      -       +      +
     82B  LEU*     3.7    16.8    -      -       +      -
     22C  THR*     4.5     5.8    -      -       +      +
     25C  ILE*     4.1    11.9    -      -       +      -
     26C  ALA*     3.6    31.0    -      -       +      +
     29C  LEU*     4.6    17.0    -      -       +      -
     72E  LEU*     3.9    14.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 52 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48A  GLY      2.3    30.9    +      -       -      +
     51A  MET*     1.3    67.8    -      -       -      +
     53A  GLY*     1.3    61.4    +      -       -      +
     54A  LEU      3.5     0.2    +      -       -      -
     55A  ILE*     3.9     3.0    -      -       +      +
     56A  ASP*     2.9    44.2    +      -       -      +
     62B  ALA*     3.3    33.2    -      -       +      +
     63B  GLY*     3.6    12.3    -      -       -      +
     77B  PRO*     3.7    13.0    -      -       +      +
     81B  GLN*     4.2    20.6    +      -       -      +
     82B  LEU*     3.4    22.1    -      -       +      +
     85B  ALA*     4.8     9.6    -      -       +      +
     44D  LYS*     5.1     4.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 53 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     49A  CYS      2.8    11.1    +      -       -      -
     50A  ARG      3.5     4.7    -      -       -      -
     51A  MET      3.1     0.4    -      -       -      -
     52A  LYS*     1.3    77.4    -      -       -      +
     54A  LEU*     1.3    59.0    +      -       -      +
     56A  ASP*     4.0     2.5    +      -       -      +
     57A  GLU*     3.4    16.8    +      -       -      +
     60B  PRO*     3.5    30.9    -      -       -      +
     61B  ASP      3.9     0.2    -      -       -      -
     62B  ALA*     3.4    20.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 54 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     50A  ARG*     2.9    28.1    +      -       +      +
     51A  MET*     3.7    20.4    -      -       +      +
     53A  GLY*     1.3    75.2    -      -       -      +
     55A  ILE*     1.3    65.8    +      -       -      +
     56A  ASP      3.0     3.6    +      -       -      -
     57A  GLU*     3.0    18.4    +      -       +      +
     58A  VAL*     3.2    15.4    +      -       -      +
     60B  PRO*     4.3    18.8    -      -       +      +
     29C  LEU*     4.4    16.8    -      -       +      +
     71E  ASP*     3.2    55.9    -      -       +      +
     72E  LEU*     4.7     4.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 55 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     51A  MET*     2.5    26.6    +      -       +      +
     52A  LYS*     3.9     4.9    -      -       +      +
     54A  LEU*     1.3    72.4    -      -       -      +
     56A  ASP*     1.3    68.6    +      -       -      +
     58A  VAL*     4.0     2.0    -      -       -      +
     59A  ASN*     3.0    27.8    +      -       -      +
     82B  LEU*     3.1    55.6    -      -       +      +
     85B  ALA*     4.6     8.7    -      -       +      -
     86B  LEU*     3.0    38.7    -      -       +      +
     89B  GLN*     4.7     0.2    -      -       -      +
     25C  ILE*     3.9    18.8    -      -       +      -
     29C  LEU*     4.2    13.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 56 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     52A  LYS*     2.9    36.7    +      -       -      +
     53A  GLY*     4.3     3.1    -      -       -      +
     54A  LEU      3.0     0.8    -      -       -      -
     55A  ILE*     1.3    86.0    -      -       -      +
     57A  GLU*     1.3    56.2    +      -       -      +
     58A  VAL      3.0     2.6    +      -       -      -
     59A  ASN*     3.1     4.7    +      -       -      +
     60A  GLN*     2.7    39.6    +      -       +      +
     62B  ALA*     4.3     7.0    -      -       +      +
     85B  ALA*     5.4     2.4    -      -       -      +
     89B  GLN*     4.4     8.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 57 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     53A  GLY      3.4    16.9    +      -       -      +
     54A  LEU*     3.0    14.4    +      -       -      +
     56A  ASP*     1.3    77.8    -      -       -      +
     58A  VAL*     1.3    56.2    +      -       -      +
     60A  GLN*     4.1     4.7    -      -       -      -
     61A  ASP*     3.3    46.4    +      -       -      +
     60B  PRO*     3.2    28.7    -      -       +      +
     71E  ASP*     5.0     3.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 58 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     54A  LEU      3.2    11.5    +      -       -      +
     55A  ILE      4.0     5.8    -      -       -      +
     56A  ASP      3.1     0.4    -      -       -      -
     57A  GLU*     1.3    75.4    -      -       -      +
     59A  ASN*     1.3    77.5    +      -       -      +
     60A  GLN      3.1     4.2    +      -       -      -
     61A  ASP*     3.2     3.9    +      -       -      +
     62A  PHE*     2.9    64.3    +      -       +      -
     86B  LEU*     5.4     1.3    -      -       +      -
     29C  LEU*     4.7    17.5    -      -       +      -
     32C  TYR*     4.4     8.5    -      -       +      -
     33C  GLN*     3.9    20.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 59 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     55A  ILE*     3.0    13.2    +      -       -      +
     56A  ASP*     3.1     5.8    +      -       -      +
     58A  VAL*     1.3    93.0    -      -       -      +
     60A  GLN*     1.3    57.0    +      -       -      +
     62A  PHE*     4.1     6.3    -      -       -      +
     63A  THR*     3.3    26.3    +      -       -      +
     86B  LEU*     2.9    30.3    -      -       -      +
     89B  GLN*     3.1    42.4    +      -       +      +
     93B  ILE*     3.9     9.3    -      -       +      +
     32C  TYR*     3.3    22.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 60 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     56A  ASP*     2.7    20.1    +      -       +      +
     57A  GLU*     4.3     4.5    -      -       -      +
     59A  ASN*     1.3    75.8    -      -       -      +
     61A  ASP*     1.3    75.7    +      -       -      +
     62A  PHE      3.1     4.5    -      -       -      -
     63A  THR*     2.6    36.5    +      -       -      +
     64A  ASN*     2.8    36.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 61 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     57A  GLU*     3.3    33.4    +      -       -      +
     58A  VAL*     3.2     4.7    +      -       -      +
     60A  GLN*     1.3    93.9    -      -       -      +
     62A  PHE*     1.3    59.9    -      -       +      +
     63A  THR      3.3     0.2    -      -       -      -
     64A  ASN*     3.9    11.4    +      -       -      +
     65A  ARG*     3.1    28.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 62 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     58A  VAL*     2.9    59.2    +      -       +      +
     59A  ASN*     4.2     8.1    -      -       -      +
     60A  GLN      3.1     0.2    -      -       -      -
     61A  ASP*     1.3    81.9    -      -       +      +
     63A  THR*     1.3    59.0    +      -       -      +
     65A  ARG*     4.1    10.2    -      -       -      +
     66A  ILE*     3.1    29.7    +      -       -      +
     93B  ILE*     4.5    17.0    -      -       +      +
     32C  TYR*     4.5    11.4    -      +       -      -
     33C  GLN*     3.7    30.1    -      -       +      -
     36C  VAL*     3.3    33.7    -      -       +      -
     37C  ASP*     3.4    19.3    -      -       -      -
     40C  LEU*     4.1    12.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with THR 63 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     59A  ASN      3.3    14.6    -      -       -      +
     60A  GLN*     2.6    35.0    +      -       -      +
     62A  PHE*     1.3    79.2    -      -       -      +
     64A  ASN*     1.3    58.9    +      -       -      +
     65A  ARG      3.4     0.2    -      -       -      -
     66A  ILE*     3.2    23.0    -      -       +      +
     67A  ASN*     3.1    28.9    +      -       -      -
     93B  ILE*     4.6    17.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 64 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     60A  GLN*     2.8    38.7    +      -       -      +
     61A  ASP*     4.2    13.4    +      -       +      +
     63A  THR*     1.3    75.8    +      -       -      +
     65A  ARG*     1.3    64.8    +      -       -      +
     67A  ASN*     3.6     8.2    +      -       -      +
     68A  LYS*     3.4    33.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 65 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     61A  ASP      3.1    19.2    +      -       -      +
     62A  PHE*     4.1    13.3    -      -       -      +
     64A  ASN*     1.3    79.5    -      -       -      +
     66A  ILE*     1.3    62.2    +      -       -      +
     68A  LYS*     3.1     8.6    +      -       -      +
     69A  LEU*     2.9    25.4    +      -       +      +
     37C  ASP*     3.1    33.9    +      -       -      +
     40C  LEU*     3.8    35.1    +      -       +      +
     41C  GLN*     5.0     5.1    -      -       -      +
     44C  GLU*     2.7    40.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 66 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     62A  PHE      3.1    12.8    +      -       -      +
     63A  THR*     3.2    33.2    -      -       +      +
     65A  ARG*     1.3    78.8    -      -       -      +
     67A  ASN*     1.3    60.1    +      -       -      +
     69A  LEU*     3.6     5.8    -      -       +      +
     70A  LYS*     2.8    59.0    +      -       +      +
     93B  ILE*     5.3     6.5    -      -       +      +
     96B  SER*     4.0    21.1    -      -       -      +
     97B  VAL*     4.6    15.9    -      -       +      +
    100B  LEU*     3.7    26.9    -      -       +      -
     40C  LEU*     5.0    11.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 67 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63A  THR*     3.1    23.3    +      -       -      +
     64A  ASN*     3.9     9.8    +      -       -      +
     65A  ARG      3.2     1.0    -      -       -      -
     66A  ILE*     1.3    83.5    -      -       -      +
     68A  LYS*     1.3    56.7    +      -       -      +
     70A  LYS*     3.4    26.2    +      -       -      +
     71A  ASN*     3.2    30.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 68 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     64A  ASN*     3.4    21.1    +      -       -      +
     65A  ARG*     3.1     8.8    +      -       -      +
     67A  ASN*     1.3    75.3    -      -       -      +
     69A  LEU*     1.3    59.8    +      -       -      +
     71A  ASN*     2.6    34.2    +      -       -      +
     72A  SER*     3.2    10.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 69 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65A  ARG*     2.9    18.3    +      -       +      +
     66A  ILE*     3.6     8.1    -      -       +      +
     68A  LYS*     1.3    76.2    -      -       -      +
     70A  LYS*     1.3    64.6    +      -       -      +
     72A  SER*     3.1     8.2    +      -       -      -
     73A  LEU*     3.1    17.5    +      -       +      +
    100B  LEU*     3.4    34.8    -      -       +      -
    104B  VAL*     4.8     8.3    -      -       +      -
     40C  LEU*     5.7     7.0    -      -       +      +
     43C  LEU*     4.1    34.8    -      -       +      -
     44C  GLU*     4.3    17.3    -      -       +      +
     47C  LEU*     4.1    20.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 70 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     66A  ILE*     2.8    38.7    +      -       +      +
     67A  ASN*     3.4    28.4    +      -       -      +
     69A  LEU*     1.3    74.6    -      -       -      +
     71A  ASN*     1.3    57.4    +      -       -      +
     73A  LEU*     2.8    25.6    +      -       -      +
     74A  PHE*     3.0    36.0    +      -       +      -
     96B  SER*     5.0     9.5    +      -       -      +
     99B  GLU*     5.6     4.3    -      -       -      +
    100B  LEU*     3.3    31.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 71 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     67A  ASN      3.2    19.7    +      -       -      +
     68A  LYS*     2.6    38.1    +      -       -      +
     70A  LYS*     1.3    77.0    -      -       -      +
     72A  SER*     1.3    64.7    +      -       -      +
     74A  PHE*     4.4     7.5    -      -       -      +
     75A  GLU*     3.2    23.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 72 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     68A  LYS*     3.2     7.0    +      -       -      +
     69A  LEU*     3.1     8.7    +      -       -      -
     70A  LYS      3.0     0.4    -      -       -      -
     71A  ASN*     1.3    90.5    +      -       -      +
     73A  LEU*     1.3    60.0    +      -       -      +
     74A  PHE      3.2     2.5    -      -       -      -
     75A  GLU*     2.9    23.6    +      -       -      +
     76A  TYR*     3.1    30.5    +      -       -      -
     47C  LEU*     3.8    22.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 73 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     69A  LEU*     3.1    12.6    +      -       +      +
     70A  LYS*     2.8    12.0    +      -       -      +
     72A  SER*     1.3    77.2    -      -       -      +
     74A  PHE*     1.3    93.8    +      -       +      +
     76A  TYR*     3.9     5.4    +      -       +      +
     77A  GLN*     3.4    31.2    +      -       +      +
    100B  LEU*     3.8    11.7    -      -       +      +
    103B  ASN*     4.9     9.9    -      -       +      +
    104B  VAL*     3.2    48.0    -      -       +      +
    107B  VAL*     6.4     0.7    -      -       +      -
    108B  SER*     5.8     3.6    -      -       -      -
     47C  LEU*     4.7     5.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 74 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     70A  LYS*     3.0    49.8    +      -       +      +
     71A  ASN*     4.5     5.8    -      -       -      +
     72A  SER      3.2     0.6    -      -       -      -
     73A  LEU*     1.3    97.6    -      -       +      +
     75A  GLU*     1.3    60.5    +      -       -      +
     76A  TYR      3.4     0.2    -      -       -      -
     77A  GLN*     3.6    17.1    -      -       +      +
     78A  LYS*     2.9    52.2    +      -       -      +
     99B  GLU*     5.5     6.3    -      -       -      -
    100B  LEU*     5.2     2.7    -      -       +      -
    103B  ASN*     6.3     1.1    -      -       -      -
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


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

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

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