Contacts of the helix formed by residues 11 - 39 (chain I) in PDB entry 2DYS


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 GLY 11 (chain I).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    303B  PSC      4.8     5.9    -      -       -      -
     40E  ASP*     2.8    32.3    +      -       -      -
      8I  GLN*     4.7     0.3    -      -       -      +
     10I  ARG*     1.3    73.2    -      -       -      +
     12I  LEU*     1.3    58.0    +      -       -      +
     13I  LEU      3.3     2.7    -      -       -      -
     14I  ALA*     4.1     5.2    -      -       -      +
     15I  ARG*     2.9    31.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 12 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     50B  LEU*     3.9    27.3    -      -       +      +
     40E  ASP*     3.3     5.6    +      -       -      +
     41E  LEU*     5.8     1.6    -      -       -      -
     42E  VAL*     4.4     8.3    -      -       +      +
     74E  LYS      4.7     0.9    -      -       -      +
     75E  ALA      4.3     2.0    -      -       -      +
     78E  HIS*     3.5    35.2    +      -       +      +
     81E  ILE*     3.6    21.3    -      -       +      -
      8I  GLN*     3.7    25.1    -      -       +      +
      9I  MET      4.4    11.7    -      -       -      +
     10I  ARG      4.4     6.3    -      -       -      +
     11I  GLY*     1.3    75.1    -      -       -      +
     13I  LEU*     1.3    65.5    +      -       -      +
     15I  ARG*     3.6    24.5    -      -       -      +
     16I  ARG*     3.1    22.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 13 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    328A  HIS*     3.6    29.3    -      -       +      +
    329A  GLY*     3.4    29.6    -      -       -      +
     48B  THR*     3.8    22.4    -      -       +      +
     50B  LEU*     3.7    37.1    -      -       +      +
     51B  THR      4.9     1.8    -      -       -      +
     52B  HIS*     3.7    20.9    -      -       +      +
     40E  ASP*     2.9    17.8    +      -       -      +
     12I  LEU*     1.3    76.4    -      -       -      +
     14I  ALA*     1.3    59.5    +      -       -      +
     16I  ARG*     3.1    11.1    +      -       -      +
     17I  LEU*     3.0    25.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 14 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    328A  HIS*     5.3     3.4    -      -       -      +
     52B  HIS*     6.2     0.2    -      -       -      +
    303B  PSC      3.5    40.2    -      -       +      +
     40E  ASP*     2.9    10.5    +      -       -      +
     11I  GLY*     4.1     5.4    -      -       -      +
     12I  LEU      3.4     0.2    -      -       -      -
     13I  LEU*     1.3    73.9    -      -       -      +
     15I  ARG*     1.3    59.5    +      -       -      +
     17I  LEU*     3.3    12.6    +      -       +      +
     18I  ARG*     2.9    31.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 15 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     78E  HIS*     4.6    16.1    -      -       -      -
      8I  GLN*     4.9    17.6    +      -       -      +
     11I  GLY      2.9    21.7    +      -       -      +
     12I  LEU*     3.6    29.2    -      -       -      +
     14I  ALA*     1.3    77.7    -      -       -      +
     16I  ARG*     1.3    68.2    +      -       -      +
     18I  ARG*     3.5     8.6    +      -       -      +
     19I  PHE*     3.2    26.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 16 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    328A  HIS*     6.4     0.2    -      -       -      -
     44B  LEU*     3.1    36.8    +      -       +      +
     45B  MET*     5.2     3.2    -      -       -      +
     47B  THR*     3.0    41.8    +      -       -      -
     48B  THR*     3.3    33.1    +      -       -      +
     50B  LEU*     4.7     8.3    -      -       +      -
    201D  TGL      3.3    26.2    -      -       -      +
     78E  HIS*     6.2     0.4    -      -       -      +
     12I  LEU      3.1    14.6    +      -       -      +
     13I  LEU*     3.1    13.1    +      -       -      +
     15I  ARG*     1.3    81.4    -      -       -      +
     17I  LEU*     1.3    64.2    +      -       -      +
     19I  PHE*     3.5     5.3    +      -       -      +
     20I  HIS*     3.1    44.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 17 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    328A  HIS*     3.6    34.8    -      -       +      +
     44B  LEU*     4.5     8.5    -      -       +      -
     45B  MET*     4.3    11.4    -      -       +      -
    303B  PSC      3.9    59.9    -      -       +      -
     13I  LEU      3.0    12.3    +      -       -      +
     14I  ALA*     3.4    12.8    -      -       +      +
     16I  ARG*     1.3    74.1    -      -       -      +
     18I  ARG*     1.3    67.9    +      -       -      +
     20I  HIS*     3.2     2.6    +      -       -      +
     21I  ILE*     2.9    48.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 18 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    303B  PSC      6.1     2.9    -      -       -      -
     14I  ALA      2.9    16.8    +      -       -      +
     15I  ARG*     3.6     7.2    -      -       -      +
     17I  LEU*     1.3    78.7    -      -       -      +
     19I  PHE*     1.3    64.6    +      -       -      +
     21I  ILE*     3.4     4.5    +      -       -      +
     22I  VAL*     3.2    33.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 19 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     15I  ARG*     3.2    14.3    +      -       -      +
     16I  ARG*     3.6    10.3    -      -       -      +
     17I  LEU      3.2     0.4    -      -       -      -
     18I  ARG*     1.3    80.4    -      -       -      +
     20I  HIS*     1.3    91.7    +      +       -      +
     22I  VAL*     3.5     6.5    +      -       -      +
     23I  GLY*     3.2    17.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with HIS 20 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     40B  TYR*     3.4    25.6    +      -       -      +
     44B  LEU*     3.7    28.7    -      -       +      +
    201D  TGL      4.1    27.1    -      -       +      +
     16I  ARG*     3.1    42.0    +      -       +      +
     19I  PHE*     1.3   100.6    -      +       -      +
     21I  ILE*     1.3    62.1    +      -       -      +
     22I  VAL      3.2     0.4    -      -       -      -
     23I  GLY*     3.8     2.4    -      -       -      +
     24I  ALA*     3.0    29.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 21 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     37B  LEU*     6.5     0.2    -      -       +      -
     40B  TYR*     5.9     0.7    -      -       +      -
     41B  ILE*     4.3    28.7    -      -       +      -
     44B  LEU*     4.7     7.6    -      -       +      -
    303B  PSC      4.4    39.5    -      -       +      -
     17I  LEU*     2.9    42.8    +      -       +      +
     18I  ARG*     4.0     4.5    -      -       -      +
     20I  HIS*     1.3    77.0    -      -       -      +
     22I  VAL*     1.3    66.0    +      -       +      +
     24I  ALA*     3.4    10.1    +      -       +      +
     25I  PHE*     3.1    22.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 22 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18I  ARG*     3.2    27.1    +      -       +      +
     19I  PHE*     3.7     5.6    -      -       -      +
     20I  HIS      3.2     0.4    -      -       -      -
     21I  ILE*     1.3    79.1    -      -       +      +
     23I  GLY*     1.3    66.1    +      -       -      +
     25I  PHE*     3.2    11.5    +      -       +      +
     26I  MET*     3.1    41.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 23 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     19I  PHE*     3.2    12.0    +      -       -      -
     20I  HIS*     3.3     4.4    +      -       -      -
     22I  VAL*     1.3    78.9    -      -       -      +
     24I  ALA*     1.3    56.5    +      -       -      +
     26I  MET*     3.0    13.1    +      -       -      +
     27I  VAL*     2.9    34.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 24 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     37B  LEU*     4.5    16.1    -      -       +      +
     40B  TYR*     3.9    28.6    +      -       +      -
     41B  ILE*     6.0     0.2    -      -       +      -
     20I  HIS      3.0    17.7    +      -       -      +
     21I  ILE*     3.5    13.0    -      -       +      +
     23I  GLY*     1.3    74.5    -      -       -      +
     25I  PHE*     1.3    57.5    +      -       -      +
     27I  VAL*     3.5     8.5    +      -       -      +
     28I  SER*     2.9    31.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 25 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     37B  LEU*     6.1     0.4    -      -       -      -
     21I  ILE*     3.1    14.5    +      -       +      +
     22I  VAL*     3.3    14.6    -      -       +      +
     23I  GLY      3.2     0.2    -      -       -      -
     24I  ALA*     1.3    74.7    -      -       -      +
     26I  MET*     1.3    81.1    +      -       +      +
     28I  SER*     3.1    10.4    +      -       -      -
     29I  LEU*     3.0    60.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with MET 26 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     22I  VAL*     3.1    31.1    +      -       +      +
     23I  GLY*     3.0    12.2    +      -       -      +
     25I  PHE*     1.3    93.7    -      -       +      +
     27I  VAL*     1.3    59.5    +      -       +      +
     29I  LEU*     3.2    12.1    +      -       -      +
     30I  GLY*     2.9    24.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 27 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     23I  GLY      2.9    22.3    +      -       -      +
     24I  ALA*     3.8     8.3    -      -       -      +
     26I  MET*     1.3    74.1    -      -       +      +
     28I  SER*     1.3    56.4    +      -       -      +
     30I  GLY*     3.2     2.3    +      -       -      +
     31I  PHE*     2.8    36.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 28 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     33B  LEU*     3.9    30.7    -      -       -      +
     37B  LEU*     4.0    16.3    -      -       -      +
     24I  ALA      2.9    18.2    +      -       -      -
     25I  PHE*     3.1    14.6    +      -       -      -
     27I  VAL*     1.3    75.3    -      -       -      +
     29I  LEU*     1.3    63.0    +      -       -      +
     31I  PHE*     3.3     3.4    +      -       -      +
     32I  ALA*     2.9    28.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 29 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     25I  PHE*     3.0    60.6    +      -       +      +
     26I  MET*     3.5    14.1    -      -       -      +
     28I  SER*     1.3    79.5    -      -       -      +
     30I  GLY*     1.3    64.0    +      -       -      +
     32I  ALA*     3.3     8.1    +      -       +      +
     33I  THR*     3.0    28.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 30 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     26I  MET      2.9    14.4    +      -       -      -
     27I  VAL*     3.2     3.8    +      -       -      -
     29I  LEU*     1.3    75.8    -      -       -      +
     31I  PHE*     1.3    57.1    +      -       -      +
     33I  THR*     3.4     8.6    -      -       -      +
     34I  PHE*     3.0    28.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 31 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29B  MET*     4.0    18.6    -      -       +      -
     32B  PHE*     4.1    21.5    -      +       +      -
     33B  LEU*     3.5    38.8    -      -       +      -
     27I  VAL*     2.8    22.1    +      -       +      +
     28I  SER*     3.6     3.8    -      -       -      +
     30I  GLY*     1.3    74.5    -      -       -      +
     32I  ALA*     1.3    60.8    +      -       -      +
     34I  PHE*     3.7    19.7    -      +       -      +
     35I  TYR*     2.8    53.9    +      +       +      +
----------------------------------------------------------
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Residues in contact with ALA 32 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29B  MET*     4.3    21.8    -      -       +      -
     33B  LEU*     5.0     2.7    -      -       +      -
     28I  SER      2.9    16.9    +      -       -      +
     29I  LEU*     3.3    10.5    +      -       +      +
     31I  PHE*     1.3    78.4    -      -       -      +
     33I  THR*     1.3    64.4    +      -       -      +
     35I  TYR*     3.6     1.6    -      -       -      +
     36I  LYS*     2.9    49.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 33 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29I  LEU*     3.0    14.8    +      -       -      +
     30I  GLY*     3.4    13.0    -      -       -      +
     32I  ALA*     1.3    77.1    -      -       -      +
     34I  PHE*     1.3    64.8    +      -       +      +
     36I  LYS*     3.6    15.5    +      -       -      +
     37I  PHE*     3.6    15.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 34 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     30I  GLY      3.0    17.5    +      -       -      +
     31I  PHE*     3.7    24.7    -      +       -      +
     33I  THR*     1.3    75.9    -      -       +      +
     35I  TYR*     1.3    68.0    +      +       +      +
     37I  PHE*     3.2    18.6    +      +       -      +
     38I  ALA*     2.8    49.8    +      -       +      +
     39I  VAL*     6.0     2.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 35 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     25B  ASP*     3.0    39.9    +      -       +      -
     26B  HIS*     5.3     0.2    -      -       -      -
     28B  LEU*     3.8    17.8    -      -       +      +
     29B  MET*     3.5    35.0    -      -       +      -
     32B  PHE*     4.5    15.5    -      +       -      -
     31I  PHE*     2.8    42.2    +      +       +      +
     32I  ALA      3.6     3.4    -      -       -      +
     34I  PHE*     1.3    75.2    -      +       -      +
     36I  LYS*     1.3    58.2    +      -       +      +
     37I  PHE      2.7    16.6    +      -       -      -
     38I  ALA      4.6     0.4    -      -       -      +
     39I  VAL*     2.9    62.8    +      -       +      +
     40I  ALA*     3.1    12.1    +      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 36 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29B  MET*     4.4    18.4    -      -       +      -
     32I  ALA*     2.9    44.0    +      -       -      +
     33I  THR*     3.7    10.0    +      -       -      +
     35I  TYR*     1.3    74.0    -      -       +      +
     37I  PHE*     1.3    58.9    +      -       -      +
     40I  ALA*     3.7    18.6    -      -       +      -
     41I  GLU*     3.5    23.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 37 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     33I  THR*     3.6    10.1    -      -       +      +
     34I  PHE*     3.4    24.7    -      +       -      +
     35I  TYR      2.7     7.3    +      -       -      -
     36I  LYS*     1.3    76.2    -      -       -      +
     38I  ALA*     1.3    88.0    +      -       +      +
     39I  VAL      3.2     1.5    -      -       -      +
     41I  GLU*     4.0    11.4    -      -       +      +
     42I  LYS*     3.4    21.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 38 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     34I  PHE*     2.8    41.4    +      -       +      +
     37I  PHE*     1.3    91.6    -      -       +      +
     39I  VAL*     1.3    67.9    +      -       +      +
     42I  LYS*     3.8    22.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 39 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     25B  ASP*     3.8    16.6    -      -       -      +
    302B  TGL      5.5     9.4    -      -       +      +
     34I  PHE*     6.0     2.2    -      -       +      -
     35I  TYR*     2.9    54.7    +      -       +      +
     37I  PHE      3.2     0.8    -      -       -      -
     38I  ALA*     1.3    89.4    -      -       +      +
     40I  ALA*     1.3    66.0    +      -       -      +
     41I  GLU      3.6     0.4    -      -       -      -
     42I  LYS*     3.8     3.4    -      -       -      +
     43I  ARG*     3.0    39.0    +      -       -      +
----------------------------------------------------------
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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