Contacts of the helix formed by residues 39 - 66 (chain I) 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 ASP 39 (chain I).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     97H  VAL*     4.4    20.8    -      -       +      +
    101H  ASN*     5.2     1.6    +      -       -      +
     34I  THR      3.8     1.2    +      -       -      -
     35I  LYS*     3.2    40.4    +      -       -      +
     36I  VAL*     2.7    10.4    +      -       -      +
     38I  LYS*     1.3    70.6    -      -       -      +
     40I  LEU*     1.3    65.5    +      -       +      +
     41I  GLN      3.1     2.2    -      -       -      -
     42I  SER*     3.2    28.0    +      -       -      +
     43I  LEU*     3.6    12.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 40 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     62G  PHE*     4.3    19.3    -      -       +      +
     65G  ARG*     3.3    50.6    +      -       +      +
     66G  ILE*     5.1    14.1    -      -       +      -
     69G  LEU*     5.9     8.0    -      -       +      +
     93H  ILE*     6.3     0.4    -      -       +      -
     97H  VAL*     4.0    27.6    -      -       +      -
     36I  VAL*     2.6    15.2    +      -       +      +
     37I  ASP      3.1    13.6    +      -       -      +
     39I  ASP*     1.3    79.2    -      -       -      +
     41I  GLN*     1.3    55.5    +      -       -      +
     42I  SER      3.3     0.2    -      -       -      -
     43I  LEU*     3.6    16.0    +      -       +      +
     44I  GLU*     3.0    29.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 41 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65G  ARG*     3.6    20.6    -      -       -      +
     37I  ASP*     3.6     1.6    +      -       -      +
     38I  LYS*     3.8    41.8    -      -       +      +
     39I  ASP      3.1     0.4    -      -       -      -
     40I  LEU*     1.3    76.6    -      -       -      +
     42I  SER*     1.3    65.2    +      -       -      +
     44I  GLU*     4.0    11.2    +      -       -      +
     45I  ASP*     2.9    60.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 42 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     38I  LYS      5.0     1.3    +      -       -      -
     39I  ASP*     3.2    25.5    +      -       -      +
     41I  GLN*     1.3    75.9    -      -       -      +
     43I  LEU*     1.3    65.0    +      -       -      +
     46I  ILE*     2.8    48.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 43 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     69G  LEU*     4.7    12.0    -      -       +      +
     97H  VAL*     4.2     7.6    -      -       +      +
    100H  LEU*     3.1    45.3    -      -       +      +
    101H  ASN*     3.0    28.9    -      -       -      +
    104H  VAL*     4.7     8.7    -      -       +      +
    105H  GLU*     4.2    11.0    -      -       -      +
     39I  ASP*     3.6    26.5    -      -       -      +
     40I  LEU*     3.6    17.2    +      -       +      +
     42I  SER*     1.3    85.4    -      -       -      +
     44I  GLU*     1.3    61.2    +      -       -      +
     46I  ILE*     4.0     7.3    -      -       -      +
     47I  LEU*     3.3    23.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 44 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65G  ARG*     2.8    38.2    +      -       -      +
     69G  LEU*     4.7    13.9    -      -       +      +
     40I  LEU      3.0    17.7    +      -       -      +
     41I  GLN*     4.0    16.5    +      -       -      +
     43I  LEU*     1.3    73.4    -      -       -      +
     45I  ASP*     1.3    59.4    +      -       -      +
     46I  ILE      3.1     1.1    -      -       -      -
     47I  LEU*     2.7    27.1    +      -       +      +
     48I  HIS*     2.9    43.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 45 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41I  GLN*     2.9    42.3    +      -       -      +
     42I  SER      4.5     0.4    -      -       -      +
     44I  GLU*     1.3    74.7    -      -       -      +
     46I  ILE*     1.3    66.8    +      -       +      +
     47I  LEU      3.2     0.2    -      -       -      -
     48I  HIS*     3.3    24.6    -      -       +      -
     49I  GLN*     2.7    32.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 46 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    104H  VAL*     4.0    14.4    -      -       +      -
    105H  GLU*     3.1    28.9    -      -       +      +
    112H  SER*     5.7     0.2    -      -       -      +
     41I  GLN      4.9     0.4    -      -       -      +
     42I  SER*     2.8    41.4    +      -       -      +
     43I  LEU      4.0     2.2    -      -       -      +
     45I  ASP*     1.3    80.6    -      -       +      +
     47I  LEU*     1.3    57.8    +      -       -      +
     48I  HIS      3.5     0.2    -      -       -      -
     49I  GLN*     3.8     5.0    +      -       -      +
     50I  VAL*     3.0    32.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 47 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     69G  LEU*     4.2    35.7    -      -       +      +
     72G  SER*     4.9     8.3    -      -       -      -
     73G  LEU*     4.9    13.0    -      -       +      +
     76G  TYR*     4.3    25.4    -      -       +      -
    104H  VAL*     4.8    17.0    -      -       +      -
     43I  LEU      3.3    12.5    +      -       -      +
     44I  GLU*     2.7    14.5    +      -       +      +
     46I  ILE*     1.3    76.9    -      -       -      +
     48I  HIS*     1.3    60.3    +      -       +      +
     49I  GLN      3.2     2.0    -      -       -      -
     50I  VAL*     4.1     9.2    -      -       +      -
     51I  GLU*     2.8    34.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with HIS 48 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     44I  GLU*     2.9    42.3    +      -       +      +
     45I  ASP*     3.3    31.2    +      -       +      +
     46I  ILE      3.5     0.2    -      -       -      -
     47I  LEU*     1.3    84.3    -      -       +      +
     49I  GLN*     1.3    67.7    +      -       -      +
     51I  GLU*     3.0    33.7    -      -       +      +
     52I  ASN*     3.1    10.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 49 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45I  ASP*     2.7    27.6    +      -       -      +
     46I  ILE*     4.0     7.6    -      -       -      +
     47I  LEU      3.2     0.4    -      -       -      -
     48I  HIS*     1.3    86.4    +      -       -      +
     50I  VAL*     1.3    61.8    +      -       +      +
     51I  GLU      3.1     1.6    -      -       -      -
     52I  ASN*     2.9    10.7    +      -       +      +
     53I  LYS*     2.8    44.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 50 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     76G  TYR*     5.5    11.7    -      -       +      -
    104H  VAL*     5.5     3.4    -      -       +      -
    108H  SER*     4.2    23.1    -      -       -      +
    112H  SER*     3.0    29.2    -      -       -      +
    115H  PHE*     3.2    35.2    -      -       +      -
     46I  ILE*     3.0    28.1    +      -       +      +
     47I  LEU*     3.4    11.9    +      -       +      +
     49I  GLN*     1.3    75.4    -      -       +      +
     51I  GLU*     1.3    58.0    +      -       -      +
     53I  LYS*     3.7     7.7    -      -       +      +
     54I  THR*     3.5     7.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 51 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     76G  TYR*     4.0    31.4    +      -       +      +
     47I  LEU*     2.8    24.1    +      -       +      +
     48I  HIS*     3.0    31.9    -      -       -      +
     50I  VAL*     1.3    71.2    -      -       -      +
     52I  ASN*     1.3    86.7    +      -       -      +
     53I  LYS      3.1     1.6    -      -       -      -
     54I  THR*     2.2    31.9    +      -       -      -
     55I  SER*     3.1    17.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 52 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48I  HIS      3.1    14.7    +      -       -      +
     49I  GLN*     2.9    13.9    +      -       -      +
     51I  GLU*     1.3    90.0    +      -       -      +
     53I  LYS*     1.3    76.5    +      -       -      +
     55I  SER*     3.6    15.9    +      -       -      -
     56I  GLU*     3.3    25.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 53 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    112H  SER*     5.3    10.8    -      -       -      +
    115H  PHE*     3.5    30.5    -      -       +      -
    116H  GLN*     5.0    19.5    -      -       +      -
     49I  GLN*     2.8    31.7    +      -       -      +
     50I  VAL*     3.7     5.8    -      -       +      +
     52I  ASN*     1.3    93.5    +      -       -      +
     54I  THR*     1.3    59.3    +      -       -      +
     56I  GLU*     3.4     7.0    +      -       +      +
     57I  VAL*     3.0    36.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 54 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     76G  TYR*     4.2    19.4    +      -       +      -
     79G  ASN*     4.0    21.5    -      -       -      +
    115H  PHE*     3.0    38.8    -      -       +      -
     50I  VAL      3.5     7.9    -      -       -      +
     51I  GLU*     2.2    33.0    +      -       -      +
     53I  LYS*     1.3    74.7    -      -       -      +
     55I  SER*     1.3    64.4    +      -       -      +
     57I  VAL*     4.0     2.4    -      -       -      +
     58I  LYS*     3.1    40.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 55 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     51I  GLU*     3.1    19.8    +      -       -      -
     52I  ASN*     3.6    26.0    +      -       -      -
     54I  THR*     1.3    81.6    +      -       -      +
     56I  GLU*     1.3    60.0    +      -       -      +
     58I  LYS*     3.5    17.5    +      -       -      +
     59I  GLN*     3.2    41.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 56 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    119H  TYR*     5.3     8.1    -      -       -      +
     52I  ASN*     3.3    18.8    +      -       -      +
     53I  LYS*     3.4     9.2    +      -       +      +
     54I  THR      3.3     0.2    -      -       -      -
     55I  SER*     1.3    79.6    -      -       -      +
     57I  VAL*     1.3    60.9    +      -       +      +
     59I  GLN*     3.5    23.7    +      -       -      +
     60I  LEU*     3.1    38.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 57 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     83G  SER*     5.3    11.9    -      -       -      -
    115H  PHE*     2.9    46.2    -      -       +      +
    116H  GLN*     4.2     7.2    -      -       +      +
    118H  MET*     4.8    10.3    -      -       +      -
     53I  LYS*     3.0    21.0    +      -       -      +
     54I  THR*     3.4     5.4    +      -       -      +
     56I  GLU*     1.3    78.4    -      -       +      +
     58I  LYS*     1.3    60.6    +      -       -      +
     59I  GLN      3.3     0.4    -      -       -      -
     60I  LEU*     3.3     7.7    +      -       +      +
     61I  ILE*     3.1    40.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 58 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     76G  TYR*     6.2     1.4    -      -       -      -
     54I  THR*     3.1    32.9    +      -       -      +
     55I  SER*     3.5    22.2    +      -       -      +
     57I  VAL*     1.3    74.6    -      -       -      +
     59I  GLN*     1.3    65.7    +      -       +      +
     61I  ILE*     3.5     7.5    +      -       -      +
     62I  LYS*     3.1    47.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 59 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     55I  SER*     3.2    28.9    +      -       -      +
     56I  GLU*     3.5    27.9    +      -       -      +
     57I  VAL      3.3     0.4    -      -       -      -
     58I  LYS*     1.3    79.5    -      -       +      +
     60I  LEU*     1.3    62.7    +      -       +      +
     62I  LYS*     3.6    13.8    +      -       +      +
     63I  ALA*     3.3    24.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 60 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    116H  GLN*     6.1     1.8    -      -       +      -
    118H  MET*     3.9    19.3    -      -       +      -
    119H  TYR*     5.0    21.3    -      -       +      +
    122H  LYS*     3.0    30.3    -      -       +      +
    123H  ASP*     5.2     7.2    -      -       -      +
     56I  GLU*     3.1    27.4    +      -       +      +
     57I  VAL*     3.5    10.5    -      -       +      +
     58I  LYS      3.3     0.8    -      -       -      -
     59I  GLN*     1.3    79.2    -      -       -      +
     61I  ILE*     1.3    56.9    +      -       -      +
     63I  ALA*     3.6     2.8    +      -       -      +
     64I  ILE*     3.0    44.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 61 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    118H  MET*     4.5     4.3    -      -       -      -
    122H  LYS*     3.1    33.4    -      -       -      +
     57I  VAL*     3.1    27.1    +      -       +      +
     58I  LYS*     4.1     7.9    -      -       -      +
     59I  GLN      3.4     0.2    -      -       -      -
     60I  LEU*     1.3    72.6    -      -       -      +
     62I  LYS*     1.3    65.4    +      -       +      +
     64I  ILE*     4.0     7.3    -      -       +      +
     65I  GLN*     3.3    41.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 62 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     58I  LYS*     3.1    36.5    +      -       -      +
     59I  GLN*     3.8    13.8    -      -       +      +
     60I  LEU      3.3     0.2    -      -       -      -
     61I  ILE*     1.3    80.2    -      -       +      +
     63I  ALA*     1.3    60.2    +      -       -      +
     65I  GLN*     3.6     8.1    +      -       -      +
     66I  LEU*     3.5    19.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 63 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     59I  GLN      3.3    15.3    +      -       -      +
     60I  LEU*     4.2     4.0    -      -       -      +
     62I  LYS*     1.3    76.4    -      -       -      +
     64I  ILE*     1.3    65.7    +      -       +      +
     65I  GLN      3.5     0.2    -      -       -      -
     66I  LEU*     3.7     8.5    +      -       -      +
     67I  THR*     2.9    31.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 64 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    122H  LYS*     4.1    29.2    -      -       +      +
    123H  ASP*     5.7     1.6    -      -       -      +
    125H  TRP*     5.6     9.4    -      -       +      +
    126H  GLN*     5.0    14.4    -      -       -      +
     60I  LEU*     3.0    37.5    +      -       +      +
     61I  ILE*     4.0    10.1    -      -       +      +
     62I  LYS      3.3     0.4    -      -       -      -
     63I  ALA*     1.3    81.2    -      -       +      +
     65I  GLN*     1.3    61.8    +      -       +      +
     67I  THR*     2.9    11.6    +      -       -      +
     68I  TYR*     2.8    39.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 65 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     61I  ILE*     3.3    30.8    +      -       +      +
     62I  LYS*     4.0     7.2    -      -       -      +
     63I  ALA      3.5     0.2    -      -       -      -
     64I  ILE*     1.3    81.8    -      -       +      +
     66I  LEU*     1.3    58.6    +      -       -      +
     67I  THR      3.6     0.2    +      -       -      -
     68I  TYR*     4.2     9.6    -      -       +      +
     69I  ASN*     3.7    21.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 66 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     62I  LYS      3.5    11.3    +      -       -      +
     63I  ALA*     4.0    11.4    -      -       -      +
     64I  ILE      3.2     0.8    -      -       -      -
     65I  GLN*     1.3    77.2    -      -       -      +
     67I  THR*     1.3    64.4    +      -       +      +
     68I  TYR      3.6     0.4    -      -       -      -
     69I  ASN*     5.5     0.9    -      -       -      -
     70I  PRO*     3.3    19.6    -      -       -      +
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


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

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

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