Contacts of the helix formed by residues 94 - 119 (chain B) in PDB entry 3GTU


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 GLU 94 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     67A  HIS*     5.0     5.8    -      -       +      +
     78A  TYR*     3.3    32.1    -      -       +      +
     81A  ARG*     2.7    40.5    +      -       -      +
     82A  LYS*     5.5     1.3    +      -       -      -
     92B  GLU      4.2     0.2    +      -       -      -
     93B  THR*     1.3    73.1    -      -       -      +
     95B  GLU*     1.3    71.5    +      -       -      +
     97B  LYS*     3.4    11.0    +      -       -      +
     98B  ILE*     3.0    40.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 95 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     67A  HIS*     3.6    27.0    +      -       +      +
     93B  THR*     3.1    16.3    +      -       -      +
     94B  GLU*     1.3    87.7    +      -       -      +
     96B  GLU*     1.3    62.4    +      -       +      +
     98B  ILE*     3.5     9.8    +      -       -      +
     99B  ARG*     3.3    27.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 96 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91B  GLY*     3.6    14.1    -      -       -      -
     92B  GLU*     3.0    20.9    +      -       -      +
     93B  THR*     3.0    29.9    +      -       -      +
     95B  GLU*     1.3    74.6    -      -       +      +
     97B  LYS*     1.3    66.6    +      -       -      +
     99B  ARG*     3.2     7.3    +      -       -      +
    100B  VAL*     3.0    26.9    +      -       -      +
    152B  ALA*     3.5    23.7    -      -       +      +
    154B  GLU      4.9     2.8    +      -       -      -
    155B  LYS*     3.2    42.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 97 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     81A  ARG*     3.2    42.7    -      -       -      +
     91B  GLY*     3.4    28.5    -      -       -      +
     92B  GLU*     3.9    13.8    +      -       -      +
     93B  THR      2.9    16.0    +      -       -      +
     94B  GLU*     3.6    10.3    +      -       -      +
     95B  GLU      3.3     0.2    -      -       -      -
     96B  GLU*     1.3    76.5    -      -       -      +
     98B  ILE*     1.3    62.5    +      -       -      +
    100B  VAL*     3.2     7.4    +      -       -      +
    101B  ASP*     3.0    32.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 98 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     67A  HIS*     3.7    36.1    -      -       +      +
     68A  LYS      5.6     0.7    -      -       -      +
     69A  ILE*     3.5    28.3    -      -       +      -
     78A  TYR*     4.1    25.4    -      -       +      -
     81A  ARG*     4.5     7.9    -      -       -      +
     94B  GLU*     3.0    31.4    +      -       +      +
     95B  GLU*     3.7     7.4    -      -       -      +
     97B  LYS*     1.3    75.8    -      -       -      +
     99B  ARG*     1.3    64.4    +      -       +      +
    101B  ASP*     3.3     3.9    +      -       -      +
    102B  ILE*     2.9    39.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 99 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     55A  ASP*     5.5     2.4    +      -       -      -
     95B  GLU*     3.3    12.7    +      -       -      +
     96B  GLU*     3.2     9.8    +      -       -      +
     98B  ILE*     1.3    80.9    -      -       +      +
    100B  VAL*     1.3    56.6    +      -       -      +
    102B  ILE*     3.2     6.2    +      -       +      +
    103B  ILE*     2.9    36.7    +      -       -      +
    144B  PHE*     3.0    63.9    +      -       +      -
    145B  LEU      4.7     0.8    +      -       -      -
    148B  PHE*     3.4    33.3    -      -       -      -
    151B  PHE*     2.7    39.6    +      -       -      +
    152B  ALA*     4.2    16.8    -      -       -      -
    153B  GLY*     4.4     0.6    -      -       -      +
    159B  VAL*     5.7     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 100 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     81B  ARG*     4.6     2.0    -      -       -      +
     90B  CYS*     5.4     1.1    -      -       +      -
     91B  GLY      3.9    22.4    -      -       -      +
     96B  GLU      3.0    17.7    +      -       -      +
     97B  LYS*     3.2     8.9    +      -       -      +
     99B  ARG*     1.3    75.7    -      -       -      +
    101B  ASP*     1.3    65.0    +      -       -      +
    103B  ILE      3.3     0.2    +      -       -      -
    104B  GLU*     2.9    30.0    +      -       -      +
    152B  ALA*     4.2    10.5    -      -       +      +
    157B  THR*     3.9    20.0    -      -       -      +
    158B  PHE*     3.6    36.6    -      -       +      -
    159B  VAL*     3.4    15.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 101 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     74A  ALA*     3.8    19.7    -      -       +      +
     77A  ARG*     3.6    24.0    +      -       -      +
     81A  ARG*     2.8    32.9    +      -       -      -
     81B  ARG*     3.1    27.4    +      -       -      +
     97B  LYS*     3.0    16.7    +      -       -      +
     98B  ILE*     3.7     5.4    -      -       -      +
    100B  VAL*     1.3    77.5    -      -       -      +
    102B  ILE*     1.3    59.7    +      -       -      +
    104B  GLU*     3.8     1.3    +      -       -      +
    105B  ASN*     2.7    34.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 102 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     55A  ASP*     5.2     5.6    -      -       +      +
     56A  PHE*     3.9    31.2    -      -       +      -
     68A  LYS      4.4     5.8    -      -       -      +
     69A  ILE*     3.9    37.7    -      -       +      -
     70A  THR*     4.0    19.7    -      -       -      +
     71A  GLN*     4.1     7.9    -      -       +      +
     74A  ALA*     4.1     4.7    -      -       +      -
     98B  ILE*     2.9    32.0    +      -       +      +
     99B  ARG*     3.7     7.4    -      -       +      +
    101B  ASP*     1.3    74.1    -      -       -      +
    103B  ILE*     1.3    61.9    +      -       +      +
    105B  ASN*     3.4     2.9    +      -       -      +
    106B  GLN*     2.8    32.3    +      -       +      +
    144B  PHE*     5.1     9.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 103 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     56A  PHE*     4.2    18.4    -      -       +      -
     99B  ARG      2.9    21.5    +      -       -      +
    100B  VAL      3.8     2.9    -      -       -      +
    102B  ILE*     1.3    75.7    -      -       -      +
    104B  GLU*     1.3    66.4    +      -       -      +
    106B  GLN*     2.9     3.5    +      -       +      -
    107B  VAL*     2.8    34.4    +      -       +      +
    141B  PHE*     4.5     8.1    -      -       +      -
    144B  PHE*     3.6    36.8    -      -       +      -
    151B  PHE*     3.9    19.5    -      -       +      +
    159B  VAL*     3.5    22.2    -      -       +      +
    162B  LEU*     5.6     0.2    -      -       +      -
    163B  THR*     3.5    23.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 104 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     77A  ARG*     4.7     1.2    +      -       -      -
    100A  GLU*     4.3     9.8    -      -       -      +
    101A  ASN*     6.0     0.2    -      -       -      -
     77B  ASN*     3.6    35.5    +      -       -      +
     81B  ARG*     2.7    48.2    +      -       -      -
    100B  VAL      2.9    18.8    +      -       -      +
    101B  ASP      3.9     3.7    -      -       -      +
    103B  ILE*     1.3    75.5    -      -       -      +
    105B  ASN*     1.3    72.6    +      -       -      +
    107B  VAL*     3.2    22.0    -      -       -      +
    108B  MET*     3.5     9.2    +      -       -      +
    158B  PHE*     3.3    16.4    -      -       +      -
    159B  VAL*     4.0     8.0    -      -       +      +
    162B  LEU*     4.3     8.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 105 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     71A  GLN*     3.4    29.4    -      -       +      +
     73A  ASN*     3.0    44.3    +      -       -      +
     74A  ALA*     3.7    10.7    -      -       -      +
     77A  ARG*     5.8     0.8    -      -       -      +
    104A  MET*     5.5     0.2    -      -       -      +
     77B  ASN*     5.6     2.4    +      -       -      +
    101B  ASP*     2.7    24.9    +      -       -      +
    102B  ILE      3.4     1.2    +      -       -      -
    103B  ILE      3.2     0.6    -      -       -      -
    104B  GLU*     1.3    85.8    +      -       -      +
    106B  GLN*     1.3    64.7    +      -       -      +
    108B  MET*     3.1    21.7    -      -       -      +
    109B  ASP*     3.2    14.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 106 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     56A  PHE*     3.5    49.4    -      -       +      +
     58A  ASN*     5.8     1.6    -      -       -      +
     70A  THR*     6.0     0.2    -      -       -      -
     71A  GLN*     3.2    23.9    +      -       -      +
    102B  ILE*     2.8    22.0    +      -       +      +
    103B  ILE*     2.9     9.3    +      -       +      +
    105B  ASN*     1.3    73.7    -      -       -      +
    107B  VAL*     1.3    64.6    +      -       -      +
    109B  ASP*     3.0    26.9    +      -       -      +
    110B  PHE*     3.0    12.5    +      -       -      +
    137B  GLN*     3.6    25.3    +      -       -      +
    140B  GLN*     5.0     1.6    -      -       -      +
    141B  PHE*     4.1    12.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 107 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     77B  ASN*     6.0     0.4    -      -       -      +
    103B  ILE*     2.8    24.6    +      -       +      +
    104B  GLU      3.2    19.5    -      -       -      +
    106B  GLN*     1.3    71.9    -      -       -      +
    108B  MET*     1.3    57.0    +      -       -      +
    110B  PHE*     3.6     7.6    -      -       -      +
    111B  ARG*     2.8    40.1    +      -       -      +
    141B  PHE*     4.2    13.7    -      -       +      -
    162B  LEU*     4.0    30.3    -      -       +      +
    163B  THR*     3.9    34.8    -      -       -      +
    166B  ILE*     4.3    13.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with MET 108 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101A  ASN*     4.5     6.3    -      -       -      +
    104A  MET*     6.4     1.8    -      -       +      -
     16B  LEU*     5.9     2.9    -      -       +      -
     76B  SER*     5.7     4.9    -      -       -      -
     77B  ASN*     3.2    37.0    -      -       -      +
    104B  GLU      3.7     8.3    -      -       -      +
    105B  ASN*     3.1    16.1    +      -       -      +
    106B  GLN      3.1     0.2    -      -       -      -
    107B  VAL*     1.3    82.6    -      -       -      +
    109B  ASP*     1.3    61.1    +      -       -      +
    111B  ARG*     3.9    24.2    -      -       -      +
    112B  THR*     2.8    41.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 109 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     58A  ASN*     4.7     6.4    +      -       -      -
     71A  GLN*     3.1    26.6    +      -       -      +
    105B  ASN      3.2    12.0    +      -       -      +
    106B  GLN*     3.0    18.7    +      -       -      +
    108B  MET*     1.3    79.3    -      -       -      +
    110B  PHE*     1.3    64.7    +      -       -      +
    112B  THR*     3.6     6.2    +      -       -      -
    113B  GLN*     3.4    26.4    +      -       -      +
    137B  GLN*     6.2     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 110 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    106B  GLN*     3.0    12.8    +      -       -      +
    107B  VAL*     3.6    10.1    -      -       -      +
    109B  ASP*     1.3    76.7    -      -       -      +
    111B  ARG*     1.3    63.2    +      -       -      +
    113B  GLN*     3.1    26.8    +      -       -      +
    114B  LEU*     3.3    10.6    +      -       -      +
    130B  TYR*     3.5    20.9    -      +       -      -
    134B  LEU*     3.6    21.3    -      -       +      -
    137B  GLN*     3.6    33.6    -      -       +      +
    138B  LEU*     3.9    16.2    -      -       +      -
    141B  PHE*     3.7    26.2    -      +       +      -
    166B  ILE*     3.7    21.8    -      -       +      -
    167B  LEU*     4.8     4.0    -      -       +      -
    170B  ASN*     3.3    21.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 111 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     16B  LEU*     3.8    33.6    +      -       -      +
     19B  ALA*     5.4     1.4    -      -       -      +
     76B  SER*     6.0     1.2    -      -       -      -
     77B  ASN*     5.1     2.2    +      -       -      -
    107B  VAL*     2.8    31.6    +      -       -      +
    108B  MET*     3.9    32.9    -      -       -      +
    110B  PHE*     1.3    71.9    -      -       -      +
    112B  THR*     1.3    57.3    +      -       -      +
    114B  LEU*     3.1     4.5    +      -       +      +
    115B  ILE*     2.8    47.6    +      -       +      +
    162B  LEU*     3.4    39.8    +      -       -      +
    165B  ASP*     3.5    25.6    +      -       -      +
    166B  ILE*     3.7    26.0    -      -       +      +
    169B  GLN*     5.0     6.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 112 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108B  MET*     2.8    32.6    +      -       -      +
    109B  ASP*     3.7     8.0    -      -       -      -
    110B  PHE      3.2     0.2    -      -       -      -
    111B  ARG*     1.3    76.0    -      -       -      +
    113B  GLN*     1.3    66.0    +      -       +      +
    115B  ILE*     3.3    10.4    +      -       -      +
    116B  ARG*     2.9    50.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 113 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    109B  ASP*     3.4    14.3    +      -       -      +
    110B  PHE*     3.1    27.8    +      -       -      +
    112B  THR*     1.3    77.8    -      -       +      +
    114B  LEU*     1.3    58.8    +      -       -      +
    116B  ARG*     3.4    10.8    +      -       -      +
    117B  LEU*     2.9    29.8    +      -       -      +
    130B  TYR*     4.1    16.9    -      -       +      -
    133B  GLU*     5.6     2.1    -      -       -      +
    137B  GLN*     4.6    11.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 114 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    110B  PHE      3.3     5.6    +      -       -      +
    111B  ARG*     3.1     9.5    +      -       +      +
    113B  GLN*     1.3    76.4    -      -       -      +
    115B  ILE*     1.3    56.0    +      -       +      +
    117B  LEU*     3.1     9.1    +      -       +      +
    118B  CYS*     2.8    64.3    +      -       -      -
    130B  TYR*     3.5    38.5    -      -       +      +
    166B  ILE*     3.7    24.2    -      -       +      -
    169B  GLN*     3.7    32.3    -      -       +      +
    170B  ASN*     4.3     9.6    -      -       -      +
    173B  PHE*     5.0    10.1    -      -       +      -
    218B  TRP*     5.3     3.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 115 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     16B  LEU*     5.3     7.6    -      -       +      -
    111B  ARG*     2.8    49.0    +      -       +      +
    112B  THR*     3.7     8.5    -      -       +      +
    114B  LEU*     1.3    72.8    -      -       +      +
    116B  ARG*     1.3    59.0    +      -       -      +
    118B  CYS*     3.2     3.3    +      -       -      +
    119B  TYR*     2.8    59.0    +      -       +      +
    169B  GLN*     6.0     3.6    -      -       -      +
    212B  ASN*     5.7     4.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 116 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    112A  LYS*     4.8    17.6    -      -       -      +
    112B  THR*     2.9    41.1    +      -       -      +
    113B  GLN*     3.4     9.1    -      -       -      +
    115B  ILE*     1.3    78.5    -      -       -      +
    117B  LEU*     1.3    57.6    +      -       -      +
    119B  TYR*     5.0     2.2    -      -       -      -
    120B  SER*     2.9    38.4    +      -       -      -
    126B  LEU*     6.0     4.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 117 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    113B  GLN      2.9    17.9    +      -       -      +
    114B  LEU*     3.4    11.2    -      -       +      +
    116B  ARG*     1.3    76.9    -      -       -      +
    118B  CYS*     1.3    66.0    +      -       -      +
    120B  SER*     4.0     4.3    +      -       -      -
    123B  HIS*     2.8    73.2    +      -       +      +
    126B  LEU*     3.7    20.4    -      -       +      +
    127B  LYS*     3.5    17.0    -      -       -      +
    130B  TYR*     3.9    20.6    -      -       +      -
    173B  PHE*     3.7    21.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with CYS 118 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    114B  LEU*     2.8    45.7    +      -       -      +
    115B  ILE*     3.8     4.5    -      -       -      +
    117B  LEU*     1.3    81.0    -      -       -      +
    119B  TYR*     1.3    55.4    +      -       +      +
    123B  HIS*     3.8     6.5    -      -       -      -
    169B  GLN*     6.1     0.2    -      -       -      -
    173B  PHE*     5.0     0.9    -      -       -      -
    212B  ASN*     3.8    19.7    -      -       -      +
    216B  ALA      4.8     0.4    -      -       -      -
    217B  GLN*     2.8    41.6    +      -       -      +
    218B  TRP*     3.3    36.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 119 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    115B  ILE*     2.8    48.5    +      -       +      +
    116B  ARG*     4.4     2.0    -      -       -      +
    118B  CYS*     1.3    74.8    -      -       +      +
    120B  SER*     1.3    69.3    +      -       -      +
    121B  SER      3.5     1.2    +      -       -      -
    212B  ASN*     4.1    14.7    -      -       +      +
    213B  ASN*     3.1    29.5    +      -       -      +
    215B  MET*     3.7    39.9    -      -       +      +
    216B  ALA*     3.7    27.1    -      -       +      -
    217B  GLN*     4.0    13.4    +      -       -      +
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


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

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

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