Contacts of the helix formed by residues 5 - 32 (chain A) in PDB entry 4HYJ


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 ASN 5 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      3A  GLU      4.4     4.4    +      -       -      +
      4A  VAL*     1.3    78.0    -      -       -      +
      6A  LEU*     1.3    65.8    +      -       -      +
      7A  LEU*     3.0    37.8    +      -       -      +
      8A  VAL*     3.1    28.2    +      -       +      +
      9A  LEU*     3.2    15.1    +      -       -      +
     69A  GLY      2.7    17.4    +      -       -      +
     71A  LEU*     4.5    23.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 6 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      4A  VAL*     4.1     2.0    +      -       -      +
      5A  ASN*     1.3    72.9    +      -       -      +
      7A  LEU*     1.3    57.5    +      -       -      +
      9A  LEU*     3.1    20.5    +      -       +      +
     10A  ALA*     2.9    32.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 7 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      5A  ASN*     3.0    12.9    +      -       -      +
      6A  LEU*     1.3    76.4    -      -       -      +
      8A  VAL*     1.3    58.8    +      -       -      +
     10A  ALA*     3.4     9.7    +      -       +      +
     11A  THR*     2.9    48.8    +      -       +      +
     71A  LEU*     6.4     0.2    -      -       +      -
    208A  GLU*     4.0    37.7    -      -       +      +
    211A  LEU*     4.2    10.8    -      -       +      -
    212A  VAL*     4.5    13.2    -      -       +      -
    215A  LEU*     4.4    15.5    -      -       +      -
    308A  LFA      5.3     5.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 8 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      5A  ASN*     3.1    32.1    +      -       +      +
      7A  LEU*     1.3    76.1    -      -       -      +
      9A  LEU*     1.3    61.9    +      -       -      +
     11A  THR*     3.3     7.7    +      -       -      -
     12A  GLN*     3.0    39.0    +      -       +      +
     65A  VAL*     4.7     8.1    -      -       +      +
     69A  GLY*     3.6    27.8    -      -       -      +
     70A  LEU      4.4     3.6    -      -       -      +
     71A  LEU*     4.1    26.9    -      -       +      +
     74A  ILE*     4.2    13.5    -      -       +      -
    211A  LEU*     4.1    10.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 9 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      4A  VAL*     4.1    18.6    -      -       +      -
      5A  ASN      3.2    11.9    +      -       -      +
      6A  LEU*     3.1    21.6    +      -       +      +
      8A  VAL*     1.3    74.0    -      -       -      +
     10A  ALA*     1.3    63.6    +      -       -      +
     12A  GLN*     3.2    26.0    +      -       -      +
     13A  TYR*     3.0    21.3    +      -       -      +
     67A  THR      5.2     3.4    -      -       -      +
     68A  SER      5.2     1.1    -      -       -      -
     69A  GLY*     3.8    22.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 10 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6A  LEU*     2.9    18.1    +      -       +      +
      7A  LEU*     3.4    17.3    -      -       +      +
      9A  LEU*     1.3    77.9    -      -       -      +
     11A  THR*     1.3    59.6    +      -       +      +
     13A  TYR*     3.0    13.2    +      -       +      +
     14A  MET*     2.9    32.1    +      -       +      +
    215A  LEU*     5.0     4.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 11 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      7A  LEU*     2.9    26.7    +      -       +      +
      8A  VAL*     3.3     8.1    +      -       -      -
     10A  ALA*     1.3    72.2    -      -       -      +
     12A  GLN*     1.3    68.0    +      -       -      +
     14A  MET*     3.7     1.1    -      -       -      +
     15A  PHE*     2.9    39.3    +      -       -      -
     65A  VAL*     3.7    18.5    -      -       -      +
    211A  LEU*     3.8    34.3    -      -       +      +
    215A  LEU*     3.9    28.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 12 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8A  VAL*     3.0    28.3    +      -       -      +
      9A  LEU*     3.3    26.3    -      -       -      +
     11A  THR*     1.3    80.9    +      -       -      +
     13A  TYR*     1.3    62.5    +      -       -      +
     15A  PHE*     3.3    10.0    +      -       -      +
     16A  TRP*     3.2    23.2    +      -       +      +
     65A  VAL*     3.8    23.1    -      -       +      +
     66A  GLY      2.9    30.8    +      -       -      +
     67A  THR*     3.9     7.5    -      -       -      +
     69A  GLY*     3.7    25.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 13 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      9A  LEU      3.0    11.5    +      -       -      +
     10A  ALA*     3.0    13.9    +      -       +      +
     12A  GLN*     1.3    76.5    -      -       -      +
     14A  MET*     1.3    73.1    +      -       +      +
     16A  TRP*     2.8    34.5    +      +       +      +
     17A  VAL*     3.0    35.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with MET 14 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     10A  ALA*     2.9    16.9    +      -       +      +
     11A  THR      3.3     2.4    +      -       -      +
     13A  TYR*     1.3    92.7    -      -       +      +
     15A  PHE*     1.3    68.0    +      -       +      +
     17A  VAL*     3.1    18.2    +      -       +      +
     18A  GLY      2.9    10.0    +      -       -      -
    215A  LEU*     3.5    35.7    -      -       +      -
    218A  ASN*     2.9    47.5    +      -       +      +
    219A  PHE*     3.4    35.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 15 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     11A  THR*     2.9    31.7    +      -       -      +
     12A  GLN*     3.7     5.2    -      -       -      +
     13A  TYR      3.2     0.4    -      -       -      -
     14A  MET*     1.3    78.7    -      -       +      +
     16A  TRP*     1.3    60.1    +      -       +      +
     18A  GLY*     3.2     2.8    +      -       -      -
     19A  PHE*     2.9    27.4    +      -       -      +
     58A  TYR*     3.7    39.8    -      +       -      +
     61A  MET*     3.4    50.0    -      -       +      -
     62A  LYS*     5.1     5.2    -      -       +      +
     65A  VAL*     4.2    33.4    -      -       +      -
    211A  LEU*     5.7     3.4    -      -       +      -
    214A  GLU*     3.9    34.3    -      -       +      -
    215A  LEU*     6.1     1.3    -      -       +      -
    218A  ASN*     5.3     2.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with TRP 16 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     12A  GLN*     3.2    27.7    +      -       +      +
     13A  TYR*     2.8    19.1    +      +       +      +
     15A  PHE*     1.3    76.3    -      -       +      +
     17A  VAL*     1.3    56.7    +      -       -      +
     19A  PHE*     3.2    33.5    +      +       +      +
     20A  VAL*     2.8    40.7    +      -       +      +
     58A  TYR      5.8     0.9    -      -       -      -
     59A  TYR*     4.4    18.8    -      +       -      -
     62A  LYS*     3.9    42.4    -      -       +      +
    310A  LFA      4.4    26.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 17 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     13A  TYR*     3.0    51.7    +      -       +      +
     14A  MET*     3.1    30.0    +      -       +      +
     16A  TRP*     1.3    74.2    -      -       -      +
     18A  GLY*     1.3    58.3    +      -       -      +
     20A  VAL*     4.1     3.9    -      -       -      +
     21A  GLY*     2.8    29.1    +      -       -      -
    218A  ASN*     4.2     2.7    -      -       -      +
    219A  PHE*     5.3     2.7    -      -       +      -
    222A  LEU*     4.3    15.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 18 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     14A  MET      2.9    11.9    +      -       -      -
     15A  PHE      3.2     3.8    +      -       -      -
     17A  VAL*     1.3    75.9    -      -       -      +
     19A  PHE*     1.3    58.3    +      -       -      +
     21A  GLY      3.8     0.2    -      -       -      -
     22A  MET*     2.9    35.8    +      -       -      +
     58A  TYR*     4.0    12.6    -      -       -      -
    218A  ASN*     3.2    23.5    +      -       -      -
    222A  LEU*     4.3     8.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 19 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     15A  PHE      2.9    14.2    +      -       -      +
     16A  TRP*     3.5    33.4    -      +       +      +
     18A  GLY*     1.3    75.3    -      -       -      +
     20A  VAL*     1.3    65.0    +      -       +      +
     22A  MET*     3.7     3.3    -      -       -      +
     23A  ALA*     2.8    43.4    +      -       +      +
     55A  ALA*     3.2    27.9    -      -       +      +
     58A  TYR*     3.6    12.6    -      -       +      +
     59A  TYR*     3.8    29.6    -      +       +      +
    309A  LFA      4.1    32.1    -      -       +      -
    310A  LFA      4.6    21.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 20 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     16A  TRP*     2.8    28.2    +      -       +      +
     17A  VAL*     4.1     4.0    -      -       -      +
     19A  PHE*     1.3    83.5    -      -       +      +
     21A  GLY*     1.3    60.2    +      -       -      +
     23A  ALA*     3.7     4.5    -      -       +      +
     24A  ALA*     2.9    33.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 21 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     17A  VAL      2.8    21.6    +      -       -      -
     18A  GLY      3.8     0.4    -      -       -      -
     20A  VAL*     1.3    74.9    -      -       -      +
     22A  MET*     1.3    56.8    +      -       -      +
     24A  ALA*     3.3     5.5    +      -       -      +
     25A  GLY*     2.9    26.7    +      -       -      -
    222A  LEU*     4.2    15.9    -      -       -      -
    226A  VAL*     4.2     5.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with MET 22 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18A  GLY      2.9    22.4    +      -       -      +
     19A  PHE      3.8     2.5    -      -       -      +
     21A  GLY*     1.3    73.9    -      -       -      +
     23A  ALA*     1.3    55.0    +      -       -      +
     25A  GLY      3.4     0.2    +      -       -      -
     26A  THR*     2.7    38.9    +      -       -      -
     51A  THR*     3.4    37.5    -      -       -      +
     54A  ALA*     3.7    24.5    -      -       +      +
     55A  ALA*     3.8     9.6    -      -       -      +
     58A  TYR*     4.5     5.8    -      -       +      -
    221A  ASP*     3.4    46.4    -      -       +      +
    222A  LEU*     3.6    15.0    -      -       +      +
    225A  LYS*     3.9    11.0    -      -       +      -
    226A  VAL*     4.2     7.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 23 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     19A  PHE*     2.8    35.5    +      -       +      +
     20A  VAL*     3.7     8.1    -      -       +      +
     22A  MET*     1.3    73.1    -      -       -      +
     24A  ALA*     1.3    58.0    +      -       -      +
     26A  THR*     3.3     7.6    +      -       -      -
     27A  LEU*     3.0    36.4    +      -       +      +
     55A  ALA*     4.1     2.1    -      -       +      +
    309A  LFA      4.1    24.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 24 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     20A  VAL*     2.9    22.5    +      -       +      +
     21A  GLY*     3.7     5.2    -      -       -      +
     23A  ALA*     1.3    75.0    -      -       -      +
     25A  GLY*     1.3    60.8    +      -       -      +
     27A  LEU*     3.3     8.6    +      -       -      +
     28A  TYR*     2.9    29.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 25 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     21A  GLY      2.9    15.7    +      -       -      -
     22A  MET      3.9     1.3    -      -       -      -
     24A  ALA*     1.3    74.6    -      -       -      +
     26A  THR*     1.3    63.7    +      -       -      +
     28A  TYR*     3.2     7.2    +      -       -      +
     29A  PHE*     3.0    38.2    +      -       -      -
     51A  THR*     3.9     1.3    -      -       -      -
    226A  VAL*     4.4    23.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with THR 26 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     22A  MET      2.7    18.7    +      -       -      -
     23A  ALA*     3.3    12.4    -      -       -      -
     24A  ALA      3.2     0.2    -      -       -      -
     25A  GLY*     1.3    77.3    -      -       -      +
     27A  LEU*     1.3    61.5    +      -       -      +
     29A  PHE*     3.4     3.9    +      -       -      +
     30A  LEU*     3.1    41.3    +      -       +      +
     48A  ALA*     3.7    16.9    -      -       +      +
     51A  THR*     2.6    23.5    +      -       -      -
     52A  PHE*     3.1    25.7    +      -       +      -
    309A  LFA      4.2    17.9    -      -       +      +
    314B  LFA      4.8     1.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 27 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     23A  ALA*     3.0    24.2    +      -       +      +
     24A  ALA*     3.8     7.0    -      -       -      +
     26A  THR*     1.3    74.8    -      -       +      +
     28A  TYR*     1.3    66.2    +      -       -      +
     30A  LEU*     3.9     9.8    -      -       +      +
     31A  VAL*     3.0    39.9    +      -       +      +
    309A  LFA      4.6    22.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 28 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     24A  ALA      2.9    17.9    +      -       -      +
     25A  GLY*     3.2     8.3    +      -       -      +
     27A  LEU*     1.3    77.5    -      -       -      +
     29A  PHE*     1.3    71.6    +      +       -      +
     31A  VAL*     3.2     4.0    +      -       +      +
     32A  GLU*     3.0    48.6    +      -       +      +
    230A  LEU*     3.6    31.6    -      -       +      -
    233A  PHE*     3.7    28.4    -      +       -      -
    234A  PHE*     3.8    13.5    -      +       -      -
----------------------------------------------------------
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Residues in contact with PHE 29 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     25A  GLY*     3.0    32.4    +      -       -      +
     28A  TYR*     1.3    82.3    -      +       -      +
     30A  LEU*     1.3    63.7    +      -       -      +
     32A  GLU*     3.8     2.6    -      -       -      -
     33A  ARG*     3.2    22.3    +      -       -      +
     44A  ALA*     3.6    19.1    -      -       -      +
     47A  ALA*     3.9    17.3    -      -       +      -
     48A  ALA*     3.6    31.2    -      -       +      -
     51A  THR*     4.0    20.9    -      -       +      -
    225A  LYS      4.6     2.7    -      -       -      -
    226A  VAL*     3.9    10.1    -      -       +      -
    229A  GLY*     3.7    34.8    -      -       -      -
    230A  LEU*     3.8    27.1    -      -       +      -
    233A  PHE*     4.3    17.2    -      +       +      -
----------------------------------------------------------
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Residues in contact with LEU 30 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     26A  THR*     3.1    35.5    +      -       +      +
     27A  LEU*     4.0    13.5    -      -       +      +
     29A  PHE*     1.3    78.0    -      -       -      +
     31A  VAL*     1.3    63.1    +      -       +      +
     33A  ARG*     3.3    53.3    +      -       -      +
     34A  ASN*     5.1     0.5    +      -       -      -
     44A  ALA      5.9     0.2    -      -       -      -
     45A  THR*     5.2     2.2    -      -       -      -
     48A  ALA*     3.9    17.7    -      -       +      -
    309A  LFA      5.7     4.3    -      -       +      -
    314B  LFA      4.3    22.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 31 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     27A  LEU*     3.0    31.5    +      -       +      +
     28A  TYR*     4.0     3.8    -      -       -      +
     30A  LEU*     1.3    77.8    -      -       +      +
     32A  GLU*     1.3    74.7    +      -       +      +
     33A  ARG      3.3     1.7    +      -       -      -
     34A  ASN*     4.3     6.9    +      -       -      +
     35A  SER*     5.0     1.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 32 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     28A  TYR*     3.0    51.6    +      -       +      +
     29A  PHE      3.8     2.0    -      -       -      +
     31A  VAL*     1.3    90.2    -      -       +      +
     33A  ARG*     1.3    63.4    -      -       -      +
     34A  ASN      3.4     0.9    -      -       -      -
     35A  SER*     3.1    36.0    +      -       -      -
     36A  LEU*     3.9     1.4    -      -       -      +
    233A  PHE*     3.3    33.5    -      -       +      -
----------------------------------------------------------
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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