Contacts of the helix formed by residues 58 - 83 (chain A) in PDB entry 1GN3


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 ALA 58 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     55A  ASP      5.0     0.8    +      -       -      -
     56A  HIS*     3.2     0.8    -      -       -      +
     57A  SER*     1.3    84.0    +      -       -      +
     59A  ILE*     1.3    63.7    +      -       -      +
     60A  LEU*     3.1     4.0    -      -       -      -
     61A  LEU*     2.8    31.9    +      -       +      +
     62A  ASN*     3.0    23.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 59 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     47A  LEU*     4.6     6.7    -      -       +      -
     56A  HIS*     3.2    29.2    +      -       +      +
     57A  SER      3.3     3.1    -      -       -      +
     58A  ALA*     1.3    75.2    -      -       -      +
     60A  LEU*     1.3    60.0    -      -       -      +
     62A  ASN*     3.0     7.9    +      -       -      +
     63A  GLU*     2.9    69.3    +      -       +      +
    112B  GLN*     4.2    26.9    -      -       +      +
    115B  ALA*     3.8    15.9    -      -       +      +
    116B  ALA*     3.9    16.8    -      -       -      +
    119B  THR*     3.5    29.4    -      -       +      +
    141B  GLN*     5.3     0.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 60 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     57A  SER      4.9     0.4    +      -       -      -
     58A  ALA*     2.9     1.9    +      -       -      -
     59A  ILE*     1.3    81.8    -      -       +      +
     61A  LEU*     1.3    64.7    -      -       +      +
     64A  LYS*     3.2    26.8    +      -       +      +
    119B  THR*     3.6    24.9    -      -       -      +
    121B  GLN*     3.2    43.5    -      -       +      +
    141B  GLN*     3.8    25.0    -      -       -      +
    143B  TYR*     4.1    13.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 61 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     58A  ALA*     2.8    22.5    +      -       +      +
     60A  LEU*     1.3    85.1    -      -       +      +
     62A  ASN*     1.3    64.3    +      -       -      +
     64A  LYS*     3.4     7.7    +      -       +      -
     65A  ASN*     3.0    51.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 62 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     43A  ALA*     4.1     5.4    -      -       -      +
     46A  LYS*     4.1    22.1    -      -       -      +
     47A  LEU*     3.2    35.3    -      -       +      +
     50A  ALA*     4.3    12.8    -      -       -      +
     56A  HIS*     5.4     1.2    +      -       -      -
     58A  ALA*     3.0    29.6    +      -       -      +
     59A  ILE*     3.0     8.7    +      -       -      +
     61A  LEU*     1.3    81.5    -      -       -      +
     63A  GLU*     1.3    62.3    +      -       -      +
     65A  ASN*     3.9     5.9    -      -       -      +
     66A  LEU*     2.8    30.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 63 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     47A  LEU*     4.7     3.4    -      -       -      -
     59A  ILE*     2.9    45.7    +      -       +      +
     60A  LEU      4.2     0.2    -      -       -      +
     62A  ASN*     1.3    77.4    -      -       +      +
     64A  LYS*     1.3    62.3    +      -       -      +
     66A  LEU*     4.4     5.9    -      -       -      +
     67A  ALA*     2.9    29.6    +      -       -      +
    112B  GLN*     3.6     8.5    +      -       -      -
    116B  ALA*     4.3     2.0    -      -       -      +
    139B  ILE*     2.7    44.6    -      -       -      +
    140B  PHE*     3.4     9.3    -      -       -      -
    141B  GLN*     3.9    34.8    +      -       +      +
    148B  ASN*     3.8     4.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 64 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     60A  LEU*     3.2    26.2    +      -       +      +
     61A  LEU*     3.4     9.6    +      -       +      +
     62A  ASN      3.2     0.6    -      -       -      -
     63A  GLU*     1.3    78.3    -      -       -      +
     65A  ASN*     1.3    69.5    +      -       -      +
     67A  ALA*     3.9     1.0    -      -       -      +
     68A  PHE*     3.0    29.4    +      -       +      +
    146A  GLN*     3.8    22.5    -      -       -      +
    143B  TYR*     3.8    32.3    -      -       -      +
    148B  ASN*     4.1    11.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 65 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     43A  ALA*     3.7    16.3    -      -       +      +
     61A  LEU*     3.0    47.9    +      -       -      +
     62A  ASN*     4.2     4.9    -      -       -      +
     64A  LYS*     1.3    78.7    -      -       -      +
     66A  LEU*     1.3    69.3    +      -       -      +
     68A  PHE*     4.6     3.8    -      -       -      +
     69A  ASN*     3.1    38.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 66 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      4A  TYR*     5.5     1.1    -      -       +      +
     40A  ALA*     4.6     3.5    -      -       -      +
     43A  ALA*     3.4    14.1    -      -       +      +
     44A  VAL*     3.4    37.9    -      -       +      +
     47A  LEU*     4.1    15.7    -      -       +      -
     62A  ASN      2.8    19.8    +      -       -      +
     63A  GLU*     4.4     4.7    -      -       -      +
     65A  ASN*     1.3    78.6    -      -       -      +
     67A  ALA*     1.3    62.6    +      -       -      +
     69A  ASN*     5.7     0.2    -      -       -      -
     70A  LEU*     3.2    31.8    +      -       +      +
    138B  LEU*     4.4    21.1    -      -       +      -
    139B  ILE      3.9    21.1    -      -       -      +
    140B  PHE*     4.2    19.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 67 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63A  GLU      2.9    19.7    +      -       -      +
     64A  LYS      4.0     1.8    -      -       -      +
     65A  ASN      3.1     0.4    -      -       -      -
     66A  LEU*     1.3    79.9    -      -       -      +
     68A  PHE*     1.3    63.3    +      -       -      +
     70A  LEU*     4.2     0.3    -      -       -      +
     71A  ALA*     3.0    29.8    +      -       -      +
    146A  GLN*     4.5     2.5    -      -       +      -
    140B  PHE*     4.6    11.9    -      -       +      -
    148B  ASN*     3.1    42.8    -      -       -      +
    149B  PHE*     4.2     4.0    -      -       -      +
    150B  PRO*     4.8     1.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 68 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     36A  TYR*     3.6    30.9    -      +       -      -
     64A  LYS*     3.0    24.7    +      -       +      +
     65A  ASN*     4.2     3.8    -      -       -      +
     67A  ALA*     1.3    77.4    -      -       -      +
     69A  ASN*     1.3    75.2    +      -       -      +
     71A  ALA*     4.0     4.1    -      -       -      +
     72A  GLY*     3.0    20.3    +      -       -      -
    144A  ASP*     5.1     4.9    -      -       +      -
    145A  GLN*     3.5    21.7    -      -       +      +
    146A  GLN*     3.7    30.6    -      -       -      +
    162A  TRP*     4.2    16.8    -      +       -      -
----------------------------------------------------------
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Residues in contact with ASN 69 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     35A  THR*     4.6     5.0    -      -       -      +
     36A  TYR*     3.3    33.2    -      -       -      +
     39A  GLY*     3.7    20.9    -      -       -      -
     40A  ALA*     3.2    24.2    -      -       -      +
     65A  ASN*     3.1    37.4    +      -       -      +
     68A  PHE*     1.3    90.4    -      -       -      +
     70A  LEU*     1.3    63.0    +      -       -      +
     71A  ALA      3.0     1.6    -      -       -      -
     72A  GLY      4.2     0.2    -      -       -      +
     73A  HIS*     2.7    31.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 70 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      4A  TYR*     3.2    50.7    -      -       +      +
     40A  ALA*     4.3     6.7    -      -       +      +
     66A  LEU*     3.2    24.5    +      -       +      +
     67A  ALA      4.2     0.7    -      -       -      +
     69A  ASN*     1.3    78.9    -      -       -      +
     71A  ALA*     1.3    53.5    +      -       -      +
     73A  HIS*     3.3     5.4    -      -       +      +
     74A  VAL*     2.6    42.6    +      -       +      +
    131B  ASP*     4.2    11.9    -      -       -      +
    133B  LEU*     4.7     0.9    -      -       +      -
    138B  LEU*     4.3     9.9    -      -       +      -
    140B  PHE*     4.2    19.1    -      -       +      -
    150B  PRO*     3.6    26.2    -      -       +      -
    153B  ILE*     4.8     0.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 71 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     67A  ALA      3.0    19.5    +      -       -      +
     68A  PHE      4.0     2.0    -      -       -      +
     70A  LEU*     1.3    75.3    -      -       -      +
     72A  GLY*     1.3    69.0    +      -       -      +
     73A  HIS      3.0     1.1    -      -       -      -
     74A  VAL*     3.1     0.6    +      -       -      -
     75A  ASN*     2.8    29.4    +      -       -      +
    145A  GLN*     3.3    23.3    -      -       -      +
    146A  GLN*     3.8    13.9    -      -       +      -
    150B  PRO*     3.8    23.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 72 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     36A  TYR*     4.0    12.8    -      -       -      -
     68A  PHE      3.0    17.5    +      -       -      -
     69A  ASN      3.9     0.9    -      -       -      -
     71A  ALA*     1.3    76.8    -      -       -      +
     73A  HIS*     1.3    58.1    +      -       -      +
     76A  HIS*     2.8    39.0    +      -       -      +
    145A  GLN*     3.2    30.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 73 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      4A  TYR*     3.6    42.0    -      +       +      +
      5A  THR      3.8    16.0    +      -       -      -
      7A  PRO*     4.2     2.2    -      -       +      -
     33A  HIS*     2.8    34.8    +      -       -      -
     36A  TYR*     3.6    14.4    -      -       +      +
     37A  VAL*     3.2    24.5    -      -       +      +
     40A  ALA*     4.7     0.9    -      -       +      -
     69A  ASN      2.7    19.5    +      -       -      +
     70A  LEU*     3.3     7.2    -      -       +      +
     72A  GLY*     1.3    79.2    -      -       -      +
     74A  VAL*     1.3    64.6    +      -       -      +
     77A  THR*     2.9    39.4    +      -       -      -
    133B  LEU*     3.9    15.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 74 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     70A  LEU*     2.6    36.2    +      -       +      +
     71A  ALA*     3.1     4.0    +      -       -      +
     73A  HIS*     1.3    75.2    -      -       -      +
     75A  ASN*     1.3    71.7    +      -       -      +
     77A  THR*     3.3    11.2    +      -       -      -
     78A  ILE*     3.4    29.3    +      -       +      +
    155A  PRO*     5.6     0.2    -      -       +      -
    131B  ASP*     4.9     2.2    -      -       -      +
    133B  LEU*     4.3    28.7    -      -       +      -
    150B  PRO*     4.5     7.0    -      -       +      -
    151B  LEU*     3.8    25.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 75 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     71A  ALA*     2.8    23.0    +      -       -      +
     74A  VAL*     1.3    77.6    -      -       -      +
     76A  HIS*     1.3    62.1    +      -       -      +
     77A  THR      3.2     0.3    +      -       -      -
     78A  ILE*     3.3     2.3    +      -       -      +
     79A  TRP*     2.8    22.3    +      -       -      +
    125A  TRP*     3.4    28.9    -      -       +      +
    142A  VAL*     5.4     2.8    -      -       -      +
    145A  GLN*     3.0    44.7    +      -       -      +
    158A  LEU*     3.2    26.1    -      -       +      +
    151B  LEU*     4.0    21.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 76 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     28A  HIS*     2.9    25.8    +      +       -      -
     33A  HIS*     3.2    27.4    -      +       +      +
     36A  TYR*     3.5    19.8    -      +       -      -
     72A  GLY      2.8    32.5    +      -       -      +
     75A  ASN*     1.3    71.9    -      -       -      +
     77A  THR*     1.3    53.8    -      -       -      +
     79A  TRP*     3.4     8.0    +      +       -      +
     80A  TRP*     2.7    40.5    +      +       -      +
    125A  TRP*     3.5    14.1    -      +       -      -
    145A  GLN*     3.3    27.6    -      -       -      -
    160A  ASP*     2.9     4.6    +      -       -      -
   1200A   FE      2.0    32.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with THR 77 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      7A  PRO*     4.3    13.2    -      -       +      +
     33A  HIS*     3.3     9.6    -      -       -      -
     73A  HIS*     2.9    42.5    +      -       -      -
     74A  VAL*     3.5     7.1    -      -       -      -
     75A  ASN      3.2     0.2    -      -       -      -
     76A  HIS*     1.3    75.8    -      -       -      +
     78A  ILE*     1.3    68.7    +      -       +      +
     80A  TRP*     3.0    18.6    +      -       -      +
     81A  LYS*     3.4    16.2    +      -       +      +
    193A  ARG*     6.3     0.4    -      -       -      +
    133B  LEU*     5.2    12.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 78 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     74A  VAL*     3.4    27.5    +      -       +      +
     75A  ASN      3.3     4.6    +      -       -      +
     77A  THR*     1.3    81.2    -      -       +      +
     79A  TRP*     1.3    64.4    +      -       -      +
     81A  LYS*     3.3     1.1    +      -       -      +
     82A  ASN*     2.8    45.1    +      -       -      +
    155A  PRO*     3.9    32.5    -      -       +      -
    156A  LEU      4.5     5.6    -      -       -      +
    158A  LEU*     4.3    20.0    -      -       +      -
    193A  ARG*     4.2    30.7    -      -       -      +
    151B  LEU*     5.9     0.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with TRP 79 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     20A  ILE*     4.7     8.1    -      -       +      -
     25A  ASN*     5.1     1.2    +      -       -      -
     28A  HIS*     3.8    18.7    +      +       -      -
     75A  ASN      2.8    14.2    +      -       -      +
     76A  HIS*     3.4    10.5    -      +       -      +
     77A  THR      3.1     0.2    -      -       -      -
     78A  ILE*     1.3    78.9    -      -       -      +
     80A  TRP*     1.3   102.5    +      +       -      +
     82A  ASN*     3.2     6.4    +      -       +      +
     83A  LEU*     3.2    44.9    +      -       +      +
    125A  TRP*     3.9    15.0    -      +       +      -
    158A  LEU*     3.6    18.6    -      -       -      +
    159A  LEU*     3.1    43.1    -      -       +      -
    160A  ASP*     3.1    21.8    -      -       +      -
    165A  ALA*     5.7     1.6    -      -       +      -
    177A  PHE*     4.2    15.5    -      +       -      -
    181A  PHE*     4.0    15.5    -      +       -      -
----------------------------------------------------------
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Residues in contact with TRP 80 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      7A  PRO*     4.5     8.7    -      -       +      -
      8A  ASP      5.8     1.1    -      -       -      +
      9A  LEU*     3.7    40.8    -      -       +      -
     10A  ASP      6.3     0.2    -      -       -      +
     11A  TRP*     3.8    16.9    +      +       +      -
     25A  ASN*     3.5    24.7    -      -       -      -
     28A  HIS*     3.6    38.1    -      +       +      -
     29A  HIS*     3.5    34.3    -      +       +      -
     33A  HIS*     2.9    31.2    +      +       +      -
     76A  HIS*     2.7    21.7    +      +       -      -
     77A  THR*     3.0     9.3    +      -       -      +
     79A  TRP*     1.3    95.3    -      +       -      +
     81A  LYS*     1.3    54.2    -      -       +      +
     83A  LEU*     2.8    34.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 81 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8A  ASP      5.5     3.8    -      -       -      -
     10A  ASP*     2.9    36.7    +      -       -      +
     77A  THR*     3.4    12.7    +      -       +      +
     78A  ILE      3.3     4.2    +      -       -      +
     80A  TRP*     1.3    70.1    -      -       +      +
     82A  ASN*     1.3    65.6    +      -       -      +
     83A  LEU      3.1     2.9    -      -       -      -
    186A  ASN*     3.2    22.3    +      -       -      +
    189A  ASP*     2.8    28.2    -      -       -      +
    193A  ARG*     3.6    18.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 82 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     78A  ILE*     2.8    22.6    +      -       -      +
     79A  TRP*     3.6     7.4    -      -       +      +
     81A  LYS*     1.3    79.3    -      -       -      +
     83A  LEU*     1.3    64.8    +      -       +      +
    156A  LEU      3.3    16.4    +      -       -      +
    157A  LEU*     3.0    24.1    -      -       +      +
    158A  LEU*     2.7    36.4    +      -       -      +
    181A  PHE*     5.8     0.4    -      -       +      -
    184A  VAL      3.6     0.9    -      -       -      +
    185A  VAL*     3.6     3.5    -      -       -      -
    186A  ASN*     2.7    32.1    +      -       -      +
    189A  ASP*     2.9    17.9    +      -       -      -
    190A  VAL*     3.9     6.6    -      -       -      +
    193A  ARG*     3.6     7.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 83 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     11A  TRP*     3.6    25.0    +      -       +      -
     16A  LEU*     3.6    22.2    -      -       +      -
     20A  ILE*     4.0     6.1    -      -       +      -
     25A  ASN*     5.1     0.7    -      -       -      +
     79A  TRP*     3.2    52.7    +      -       +      +
     80A  TRP*     2.8    21.8    +      -       +      +
     81A  LYS*     3.7     5.7    -      -       -      +
     82A  ASN*     1.3    86.7    -      -       +      +
     84A  SER*     1.3    64.6    +      -       -      +
    181A  PHE*     4.3    20.2    -      -       +      -
    184A  VAL*     3.6    25.4    -      -       +      +
    186A  ASN*     3.7     2.3    +      -       -      -
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


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

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

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