Contacts of the helix formed by residues 92 - 121 (chain B) in PDB entry 2DPD


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 92 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     68B  GLY      3.4    17.3    -      -       -      +
     69B  ILE*     3.0    10.0    +      -       -      +
     91B  LYS*     1.3    80.0    -      -       +      +
     93B  TYR*     1.3    63.3    +      -       -      +
     94B  GLU*     3.1    13.9    +      -       -      +
     95B  ALA*     3.0    29.8    +      -       +      +
     96B  ALA*     3.1    17.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 93 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     24B  ILE*     5.8     0.4    -      -       +      -
     28B  GLU*     3.0    29.2    +      -       +      +
     90B  PHE*     3.6    55.6    -      +       +      +
     91B  LYS      3.8     2.6    +      -       -      -
     92B  ASP*     1.3    72.6    +      -       -      +
     94B  GLU*     1.3    61.4    +      -       +      +
     96B  ALA*     3.2     6.1    +      -       +      -
     97B  LYS*     2.9    56.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 94 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     92B  ASP*     3.1     9.6    +      -       -      +
     93B  TYR*     1.3    72.7    -      -       +      +
     95B  ALA*     1.3    69.3    +      -       -      +
     97B  LYS*     2.9    20.8    +      -       -      +
     98B  LEU*     2.9    32.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 95 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     67B  ASP      5.3     2.0    -      -       -      +
     68B  GLY      4.8     1.8    -      -       -      +
     69B  ILE*     4.1    20.0    -      -       +      +
     92B  ASP*     3.0    38.2    +      -       +      +
     94B  GLU*     1.3    76.7    -      -       -      +
     96B  ALA*     1.3    61.1    -      -       -      +
     98B  LEU*     3.5    11.6    +      -       -      +
     99B  TYR*     3.1    22.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 96 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     24B  ILE*     4.2    14.2    -      -       +      +
     69B  ILE*     3.8    19.0    -      -       +      +
     90B  PHE*     3.6    31.0    -      -       +      -
     92B  ASP      3.1     6.2    +      -       -      +
     93B  TYR*     3.3    14.1    -      -       +      +
     94B  GLU      3.0     0.6    -      -       -      -
     95B  ALA*     1.3    73.7    -      -       -      +
     97B  LYS*     1.3    67.9    +      -       -      +
     98B  LEU      3.0     0.5    +      -       -      -
     99B  TYR*     3.0     5.6    +      -       -      +
    100B  LYS*     2.8    24.6    +      -       -      +
----------------------------------------------------------
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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
----------------------------------------------------------
     28B  GLU*     5.4     2.9    -      -       -      +
     93B  TYR*     2.9    56.3    +      -       +      +
     94B  GLU*     3.5    21.8    -      -       -      +
     96B  ALA*     1.3    72.2    -      -       -      +
     98B  LEU*     1.3    65.0    +      -       +      +
    100B  LYS*     3.1     9.3    +      -       -      +
    101B  LYS*     3.0    47.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 98 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     94B  GLU*     2.9    19.9    +      -       +      +
     95B  ALA*     3.5    11.0    -      -       -      +
     97B  LYS*     1.3    77.3    -      -       +      +
     99B  TYR*     1.3    63.7    +      -       -      +
    101B  LYS*     3.0    22.3    +      -       +      +
    102B  GLN*     3.0    23.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 99 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     16B  ARG*     5.5     0.2    -      -       -      -
     17B  ALA*     3.9    16.8    -      -       -      +
     20B  LYS*     3.2    50.5    +      -       +      -
     24B  ILE*     3.4    21.3    -      -       +      -
     64B  LEU*     4.4     7.2    -      -       +      -
     67B  ASP*     5.9     1.3    -      -       -      -
     69B  ILE*     5.2     9.6    -      -       +      -
     95B  ALA      3.1     9.6    +      -       -      +
     96B  ALA*     3.0     9.3    +      -       -      +
     98B  LEU*     1.3    76.4    -      -       -      +
    100B  LYS*     1.3    66.6    +      -       -      +
    102B  GLN*     3.2    29.5    +      -       +      +
    103B  LEU*     3.0    49.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 100 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121A  ASN      2.8    28.8    +      -       -      -
    122A  PHE*     3.3    27.9    -      -       +      +
     21B  LEU*     3.6    18.4    -      -       +      -
     24B  ILE*     3.7    24.5    -      -       +      -
     25B  THR*     3.4    23.7    -      -       -      +
     28B  GLU*     3.3    29.4    +      -       -      +
     96B  ALA      2.8    17.1    +      -       -      +
     97B  LYS*     3.1    12.5    +      -       -      +
     99B  TYR*     1.3    72.5    -      -       -      +
    101B  LYS*     1.3    58.7    +      -       +      +
    103B  LEU*     3.2     3.5    +      -       -      +
    104B  LYS      3.0    23.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 101 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    122A  PHE*     5.2     1.3    -      -       +      -
     97B  LYS*     3.0    32.9    +      -       -      +
     98B  LEU*     3.0    14.9    +      -       +      +
    100B  LYS*     1.3    75.6    -      -       +      +
    102B  GLN*     1.3    65.9    +      -       -      +
    104B  LYS*     3.0    18.2    +      -       -      +
    105B  VAL*     3.0    16.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 102 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98B  LEU*     3.0    20.4    +      -       -      +
     99B  TYR*     3.5    33.0    +      -       +      +
    101B  LYS*     1.3    75.9    -      -       +      +
    103B  LEU*     1.3    50.6    +      -       +      +
    105B  VAL*     2.8    15.3    +      -       -      +
    106B  GLU*     2.8    38.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 103 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    122A  PHE*     4.0     2.0    -      -       -      -
     13B  VAL*     4.7     2.7    -      -       +      -
     17B  ALA*     3.4    36.8    -      -       +      +
     18B  PHE*     5.6     0.2    -      -       -      -
     21B  LEU*     3.9    42.0    -      -       +      +
     24B  ILE*     4.8     0.2    -      -       +      -
     99B  TYR*     3.0    57.7    +      -       +      +
    100B  LYS*     3.6     7.0    -      -       -      +
    101B  LYS      3.2     0.2    -      -       -      -
    102B  GLN*     1.3    71.9    -      -       -      +
    104B  LYS*     1.3    65.4    +      -       -      +
    106B  GLU*     3.6    17.8    -      -       +      +
    107B  LEU*     2.9    29.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 104 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    118A  LEU*     3.5    18.0    -      -       +      +
    122A  PHE*     3.4    54.9    -      -       +      -
    100B  LYS      3.0     7.6    +      -       -      +
    101B  LYS*     3.0    12.1    +      -       -      +
    103B  LEU*     1.3    75.0    -      -       -      +
    105B  VAL*     1.3    55.9    +      -       +      +
    107B  LEU*     3.2     4.0    +      -       -      +
    108B  ASP*     2.7    71.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 105 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101B  LYS      3.0     9.7    +      -       -      +
    102B  GLN*     2.8    14.4    +      -       -      +
    104B  LYS*     1.3    81.4    -      -       +      +
    106B  GLU*     1.3    64.8    +      -       +      +
    108B  ASP*     3.0    17.5    +      -       -      +
    109B  ARG*     3.1    24.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 106 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     11B  PHE      5.1     1.4    -      -       -      +
     12B  LEU      5.6     0.2    -      -       -      -
     13B  VAL*     4.0    33.2    +      -       +      +
     14B  LYS*     4.9     2.9    +      -       -      +
     17B  ALA*     4.7     7.4    -      -       -      +
    102B  GLN*     2.8    20.9    +      -       +      +
    103B  LEU*     3.6    18.8    -      -       +      +
    105B  VAL*     1.3    74.4    -      -       +      +
    107B  LEU*     1.3    66.0    +      -       -      +
    108B  ASP      3.2     0.2    +      -       -      -
    109B  ARG*     3.3    21.6    +      -       -      +
    110B  SER*     2.9    26.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 107 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    114A  ILE*     3.7    12.9    -      -       +      +
    117A  ALA*     3.6    26.9    -      -       +      -
    118A  LEU*     3.5    37.0    -      -       +      +
    122A  PHE*     4.2     0.2    -      -       +      -
     13B  VAL*     3.9    32.3    -      -       +      -
     18B  PHE*     4.6    13.2    -      -       +      -
     21B  LEU*     3.7    22.2    -      -       +      -
    103B  LEU*     2.9    21.3    +      -       +      +
    104B  LYS      3.6     0.4    -      -       -      +
    106B  GLU*     1.3    77.7    -      -       -      +
    108B  ASP*     1.3    57.6    +      -       -      +
    110B  SER*     3.3     5.3    +      -       -      -
    111B  LYS*     2.9    31.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 108 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    118A  LEU*     3.7    13.0    -      -       -      +
    104B  LYS*     2.7    50.0    +      -       -      +
    105B  VAL*     3.0    11.6    +      -       -      +
    107B  LEU*     1.3    77.8    -      -       -      +
    109B  ARG*     1.3    62.7    +      -       -      +
    111B  LYS*     3.4    10.9    +      -       -      +
    112B  LYS*     3.0    27.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 109 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48A  ILE*     3.1    39.4    +      -       +      +
     49A  GLY*     3.5    15.2    +      -       -      -
     50A  PHE      3.9     0.6    -      -       -      +
     10B  GLY*     2.4    37.7    +      -       -      -
     11B  PHE      2.7    20.2    +      -       -      -
    105B  VAL*     3.1    20.8    +      -       +      +
    106B  GLU*     3.6    20.4    +      -       -      +
    108B  ASP*     1.3    74.4    -      -       -      +
    110B  SER*     1.3    52.7    +      -       -      +
    112B  LYS*     2.6    32.2    +      -       +      +
    113B  LEU*     2.8    24.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 110 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    114A  ILE*     4.0    17.0    -      -       -      -
     11B  PHE      4.6     1.6    +      -       -      -
     12B  LEU*     3.3    19.9    -      -       -      +
     13B  VAL*     3.0    34.9    +      -       -      +
    106B  GLU*     2.9    18.5    +      -       -      -
    107B  LEU*     3.3     8.5    +      -       -      -
    109B  ARG*     1.3    77.0    +      -       -      +
    111B  LYS*     1.3    65.3    +      -       -      +
    113B  LEU*     3.4     1.9    +      -       -      -
    114B  ILE*     3.2    26.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 111 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    111A  LYS*     5.8     4.3    -      -       +      +
    114A  ILE*     3.6    24.0    -      -       +      +
    115A  GLU*     3.4    36.1    +      -       +      +
    118A  LEU*     5.3    12.6    -      -       +      -
    107B  LEU      2.9     9.2    +      -       -      +
    108B  ASP*     3.5    15.0    -      -       -      +
    110B  SER*     1.3    77.5    -      -       -      +
    112B  LYS*     1.3    64.3    +      -       -      +
    114B  ILE*     3.1     4.3    +      -       -      +
    115B  GLU*     2.8    56.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 112 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48A  ILE*     3.7    34.3    -      -       +      -
    108B  ASP*     3.0    17.9    +      -       -      +
    109B  ARG*     2.6    20.8    +      -       +      +
    111B  LYS*     1.3    71.6    -      -       -      +
    113B  LEU*     1.3    51.5    +      -       -      +
    115B  GLU*     3.2     7.0    +      -       -      +
    116B  LYS*     2.7    37.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 113 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18A  PHE*     4.2    12.2    -      -       +      -
     45A  PHE*     3.6    25.6    -      -       +      -
     48A  ILE*     3.5    26.9    -      -       +      +
     50A  PHE*     3.9    14.1    -      -       +      -
     10B  GLY      4.0     9.4    -      -       -      +
     11B  PHE*     3.9    38.4    -      -       +      +
     12B  LEU*     4.0    15.9    -      -       +      -
    109B  ARG*     2.8    19.5    +      -       -      +
    110B  SER*     3.6     8.3    -      -       -      +
    112B  LYS*     1.3    71.3    -      -       -      +
    114B  ILE*     1.3    65.7    +      -       +      +
    116B  LYS*     3.0     5.3    +      -       -      +
    117B  ALA*     2.8    24.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 114 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     12A  LEU*     5.6     0.7    -      -       +      -
     13A  VAL*     4.6     4.3    -      -       +      -
     18A  PHE*     4.9     5.6    -      -       +      -
    107A  LEU*     3.8    15.9    -      -       +      +
    110A  SER*     3.8    23.8    -      -       -      +
    111A  LYS*     3.6    38.4    -      -       +      +
    114A  ILE*     5.3     3.8    -      -       +      -
     12B  LEU*     3.3    44.9    -      -       +      -
    110B  SER      3.2     4.7    +      -       -      +
    111B  LYS*     3.1     9.9    +      -       -      +
    113B  LEU*     1.3    79.7    -      -       +      +
    115B  GLU*     1.3    60.3    +      -       -      +
    117B  ALA*     3.4     5.6    +      -       -      +
    118B  LEU*     2.8    36.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 115 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    111A  LYS*     3.6    37.3    +      -       +      +
    115A  GLU*     3.9     1.6    -      -       -      +
    111B  LYS*     2.8    57.2    +      -       +      +
    112B  LYS*     3.7     6.5    -      -       -      +
    114B  ILE*     1.3    78.7    -      -       +      +
    116B  LYS*     1.3    55.9    +      -       -      +
    118B  LEU*     3.7     6.7    -      -       +      +
    119B  SER*     3.1    27.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 116 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     22A  TYR*     4.0     2.6    +      -       -      -
     44A  GLU*     2.9    47.2    +      -       -      +
     45A  PHE*     3.5    25.0    -      -       +      -
     48A  ILE*     4.1    19.3    -      -       +      -
    112B  LYS      2.7    22.0    +      -       -      +
    113B  LEU*     3.5     3.8    -      -       -      +
    115B  GLU*     1.3    70.0    -      -       -      +
    117B  ALA*     1.3    66.1    +      -       -      +
    119B  SER*     3.0     5.2    +      -       -      -
    120B  ASP*     2.8    54.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 117 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18A  PHE*     3.3    38.3    -      -       +      -
     21A  LEU*     5.3     1.8    -      -       +      -
     22A  TYR*     3.2    19.9    +      -       +      -
    107A  LEU*     3.8    15.8    -      -       +      +
    113B  LEU      2.8    12.3    +      -       -      +
    114B  ILE      3.7     4.0    -      -       -      +
    116B  LYS*     1.3    73.1    -      -       -      +
    118B  LEU*     1.3    62.8    +      -       -      +
    121B  ASN*     3.1    32.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 118 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    104A  LYS*     3.7    27.4    -      -       +      +
    107A  LEU*     3.5    31.6    -      -       +      -
    108A  ASP*     3.8     9.9    -      -       -      +
    111A  LYS*     5.1    13.0    -      -       +      -
    114B  ILE*     2.8    25.3    +      -       +      +
    115B  GLU*     3.7     9.0    -      -       +      +
    117B  ALA*     1.3    76.5    -      -       -      +
    119B  SER*     1.3    60.0    +      -       -      +
    122B  PHE*     3.6    43.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 119 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    115B  GLU      3.1    16.3    +      -       -      -
    116B  LYS*     3.0     8.4    +      -       -      -
    118B  LEU*     1.3    76.5    -      -       -      +
    120B  ASP*     1.3    66.7    +      -       -      +
    122B  PHE*     2.9    21.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 120 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     22A  TYR*     2.5    27.4    +      -       +      +
     25A  THR*     4.8     4.5    -      -       -      +
     26A  MET*     6.2     1.6    -      -       +      -
     44A  GLU*     2.9    13.0    -      -       -      +
    116B  LYS*     2.8    34.8    +      -       -      +
    119B  SER*     1.3    82.5    +      -       -      +
    121B  ASN*     1.3    72.8    +      -       -      +
    122B  PHE*     3.4     2.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 121 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     21A  LEU*     3.1    48.6    +      -       +      +
     22A  TYR*     3.2    36.7    -      -       -      +
     25A  THR*     2.5    34.8    +      -       -      +
    100A  LYS*     2.8    29.3    +      -       -      -
    117B  ALA      3.1    18.4    +      -       -      +
    120B  ASP*     1.3    76.8    -      -       -      +
    122B  PHE*     1.3    60.7    +      -       +      +
----------------------------------------------------------
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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