Contacts of the helix formed by residues 25 - 55 (chain W) 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 25 (chain W).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18W  LEU*     5.7     2.0    -      -       -      +
     22W  LEU      3.2     7.1    +      -       -      +
     23W  LYS      3.3     2.2    +      -       -      -
     24W  GLY*     1.3    80.1    -      -       -      +
     26W  ALA*     1.3    58.5    +      -       -      -
     27W  THR*     3.2     4.0    -      -       -      -
     28W  ASP*     3.0    22.4    +      -       -      +
     29W  ASN*     3.2    14.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 26 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     25W  GLY*     1.3    67.3    -      -       -      -
     27W  THR*     1.3    65.1    +      -       -      +
     28W  ASP      3.3     0.2    -      -       -      -
     29W  ASN*     3.3    16.2    -      -       +      +
     30W  ILE*     3.2    29.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 27 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    309P  CDL      3.8    31.1    +      -       +      +
     24W  GLY      5.8     1.3    -      -       -      -
     25W  GLY      3.1     1.7    +      -       -      -
     26W  ALA*     1.3    74.5    -      -       -      +
     28W  ASP*     1.3    74.1    +      -       -      +
     30W  ILE*     2.9    14.7    +      -       +      +
     31W  LEU*     2.9    32.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 28 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     56P  GLN*     4.5     1.4    -      -       -      +
     59P  ARG*     3.8    13.6    +      -       -      +
     63P  ARG*     2.9    30.3    +      -       -      -
    309P  CDL      4.1     6.6    +      -       -      -
     21W  HIS      3.2    19.3    -      -       -      +
     22W  LEU*     3.1    12.8    -      -       -      +
     24W  GLY*     2.6    35.4    +      -       -      -
     25W  GLY      3.3    11.4    -      -       -      +
     27W  THR*     1.3    79.4    -      -       -      +
     29W  ASN*     1.3    62.9    +      -       -      +
     31W  LEU*     3.9     2.6    -      -       -      +
     32W  TYR*     2.9    27.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 29 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18W  LEU*     6.2     1.0    -      -       -      +
     22W  LEU*     4.0    34.2    +      -       -      +
     25W  GLY      3.2    18.4    +      -       -      -
     26W  ALA*     3.3    17.1    -      -       +      +
     28W  ASP*     1.3    81.6    -      -       -      +
     30W  ILE*     1.3    63.5    +      -       +      +
     32W  TYR*     3.4     3.8    +      -       -      +
     33W  ARG*     3.0    41.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 30 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     26W  ALA*     3.2    19.3    -      -       +      +
     27W  THR*     2.9    16.3    +      -       +      +
     29W  ASN*     1.3    73.4    -      -       +      +
     31W  LEU*     1.3    67.7    +      -       -      +
     33W  ARG*     2.9    22.4    +      -       -      +
     34W  VAL*     2.9    36.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 31 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     52P  LEU*     3.7    27.1    -      -       +      -
     55P  TYR*     4.0    27.4    -      -       +      -
     56P  GLN*     3.3    27.6    -      -       +      +
     59P  ARG*     4.2     7.6    -      -       -      +
    309P  CDL      4.1    31.6    -      -       +      -
     27W  THR*     2.9    25.2    +      -       +      +
     28W  ASP*     3.9     3.8    -      -       -      +
     30W  ILE*     1.3    73.5    -      -       -      +
     32W  TYR*     1.3    53.8    +      -       -      +
     34W  VAL*     3.3    12.0    +      -       +      +
     35W  THR*     2.8    37.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 32 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8N  PHE*     3.7    16.1    -      +       -      -
     15P  PRO*     3.7    17.7    -      -       +      -
     16P  TRP*     3.7    26.9    -      +       +      -
     56P  GLN*     3.6     7.5    +      -       -      -
     21W  HIS*     4.4     6.7    -      +       -      -
     22W  LEU*     4.3    17.3    -      -       +      -
     28W  ASP      2.9    19.3    +      -       -      +
     29W  ASN*     3.5     5.4    -      -       -      +
     31W  LEU*     1.3    76.9    -      -       -      +
     33W  ARG*     1.3    61.6    +      -       +      +
     35W  THR*     3.3     2.0    +      -       -      -
     36W  MET*     2.8    61.7    +      -       +      +
    101W  CHD      3.4    51.2    -      +       +      +
----------------------------------------------------------
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Residues in contact with ARG 33 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29W  ASN*     3.0    29.9    +      -       -      +
     30W  ILE*     2.9    20.2    +      -       -      +
     32W  TYR*     1.3    85.0    -      -       +      +
     34W  VAL*     1.3    55.0    +      -       +      +
     36W  MET*     4.1     1.2    -      -       -      +
     37W  THR*     2.5    38.7    +      -       -      -
    101W  CHD      3.2    57.5    +      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 34 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     52P  LEU*     4.5    10.5    -      -       +      -
    309P  CDL      5.4     7.9    -      -       +      -
     30W  ILE*     2.9    33.5    +      -       +      +
     31W  LEU*     3.4    13.7    -      -       +      +
     33W  ARG*     1.3    74.3    -      -       +      +
     35W  THR*     1.3    65.4    +      -       -      +
     37W  THR*     3.3     5.5    +      -       -      -
     38W  LEU*     3.0    48.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 35 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     16P  TRP*     4.1     5.6    -      -       +      -
     19P  THR*     3.9    28.7    -      -       +      +
     49P  THR*     4.5     1.6    -      -       -      +
     52P  LEU*     3.7    30.8    -      -       +      +
     53P  THR*     4.4     4.9    -      -       -      +
     56P  GLN*     2.7    32.5    +      -       -      +
     31W  LEU      2.8    16.7    +      -       -      -
     32W  TYR      3.5     4.0    -      -       -      -
     34W  VAL*     1.3    75.7    -      -       -      +
     36W  MET*     1.3    58.4    +      -       -      +
     38W  LEU*     3.2     5.4    +      -       -      +
     39W  CYS*     2.9    36.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with MET 36 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8N  PHE*     4.1    11.9    -      -       +      -
     15P  PRO*     3.8    11.9    -      -       +      +
     18P  LEU*     5.0     9.2    -      -       +      -
     19P  THR*     3.6    26.9    -      -       +      -
     22P  LEU*     5.6     0.7    -      -       -      -
     32W  TYR*     2.8    49.5    +      -       +      +
     33W  ARG*     4.1     1.8    -      -       -      +
     35W  THR*     1.3    74.7    -      -       -      +
     37W  THR*     1.3    58.3    +      -       -      +
     39W  CYS*     3.5     4.4    +      -       -      +
     40W  LEU*     2.9    49.8    +      -       +      +
    101W  CHD      3.6    50.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with THR 37 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     33W  ARG      2.5    25.5    +      -       -      -
     34W  VAL*     3.6     5.2    -      -       -      -
     36W  MET*     1.3    72.5    -      -       -      +
     38W  LEU*     1.3    61.9    +      -       +      +
     40W  LEU*     4.9     1.3    -      -       -      -
     41W  GLY*     2.7    34.3    +      -       -      -
    101W  CHD      3.9    46.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 38 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     26P  LEU*     4.1     0.3    -      -       -      +
     45P  ILE*     3.9    18.0    -      -       +      +
     48P  THR*     4.2    13.7    -      -       +      -
     49P  THR*     3.3    20.0    -      -       +      -
     52P  LEU*     3.5    31.0    -      -       +      -
    309P  CDL      6.1     0.9    -      -       +      -
     34W  VAL*     3.0    30.0    +      -       +      +
     35W  THR      3.6     1.1    -      -       -      +
     37W  THR*     1.3    81.2    -      -       +      +
     39W  CYS*     1.3    54.2    +      -       -      +
     41W  GLY*     5.1     0.4    -      -       -      -
     42W  GLY*     2.7    33.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with CYS 39 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     19P  THR*     3.7    38.6    -      -       +      -
     22P  LEU*     4.0    20.4    -      -       +      -
     23P  SER      4.8     0.2    -      -       -      -
     26P  LEU*     4.2     7.1    -      -       -      +
     49P  THR*     3.5    27.4    -      -       -      -
     35W  THR*     2.9    22.1    +      -       -      +
     36W  MET*     3.8     7.0    -      -       -      +
     38W  LEU*     1.3    76.6    -      -       -      +
     40W  LEU*     1.3    55.4    +      -       +      +
     42W  GLY      3.9     0.2    -      -       -      -
     43W  THR*     2.6    38.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 40 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18P  LEU*     5.9     2.5    -      -       +      -
     22P  LEU*     4.1    19.5    -      -       +      -
     36W  MET*     2.9    36.5    +      -       +      +
     37W  THR*     4.2     2.0    -      -       -      +
     39W  CYS*     1.3    72.8    -      -       -      +
     41W  GLY*     1.3    65.8    +      -       -      +
     43W  THR*     3.4     6.2    +      -       +      +
     44W  LEU*     3.0    31.5    +      -       +      +
    101W  CHD      3.5    52.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 41 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     37W  THR*     2.7    22.8    +      -       -      -
     38W  LEU*     5.1     0.2    -      -       -      -
     40W  LEU*     1.3    71.3    -      -       -      +
     42W  GLY*     1.3    53.0    +      -       -      +
     44W  LEU*     3.0    15.0    +      -       -      +
     45W  TYR*     2.8    34.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 42 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     26P  LEU*     3.2    22.4    -      -       -      +
     42P  LEU*     3.6     2.1    -      -       -      +
     45P  ILE*     4.5    15.9    -      -       -      +
     38W  LEU      2.7    21.9    +      -       -      -
     41W  GLY*     1.3    71.7    -      -       -      -
     43W  THR*     1.3    51.6    +      -       -      +
     45W  TYR*     3.4     9.1    -      -       -      +
     46W  SER*     2.7    31.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with THR 43 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    110N  LEU*     5.9     0.9    -      -       +      -
     22P  LEU*     3.5    28.9    -      -       +      +
     25P  LEU*     4.2    14.3    -      -       +      +
     26P  LEU*     3.6     7.2    -      -       -      +
     39W  CYS      2.6    22.9    +      -       -      -
     40W  LEU*     3.6     8.7    -      -       +      -
     42W  GLY*     1.3    73.3    -      -       -      +
     44W  LEU*     1.3    67.2    +      -       +      +
     46W  SER*     2.4    23.4    +      -       -      +
     47W  LEU*     3.0    25.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 44 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     40W  LEU*     3.0    21.6    +      -       +      +
     41W  GLY*     3.0    13.1    +      -       -      +
     43W  THR*     1.3    74.8    -      -       +      +
     45W  TYR*     1.3    67.5    +      -       -      +
     47W  LEU*     3.1    20.7    +      -       +      +
     48W  TYR*     3.1    21.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 45 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     33P  MET*     5.7     2.0    -      -       +      +
     39P  SER*     4.6     6.6    +      -       -      -
     41P  THR*     4.0    34.8    +      -       +      +
     42P  LEU*     3.9    29.6    -      -       +      -
     45P  ILE*     4.2    12.8    -      -       +      -
     41W  GLY      2.8    13.2    +      -       -      +
     42W  GLY*     3.4     9.4    -      -       -      +
     44W  LEU*     1.3    77.5    -      -       -      +
     46W  SER*     1.3    62.0    +      -       -      +
     48W  TYR*     3.1    27.6    +      +       -      +
     49W  CYS*     3.0    39.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 46 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    110N  LEU*     5.5     2.9    -      -       -      +
     25P  LEU*     4.1    10.2    -      -       -      +
     26P  LEU*     4.0     5.7    -      -       -      +
     29P  SER*     3.8    22.9    +      -       -      -
     42P  LEU*     3.9    20.4    -      -       -      +
     42W  GLY      2.7    11.5    +      -       -      -
     43W  THR*     2.4    34.7    +      -       -      +
     45W  TYR*     1.3    77.0    -      -       -      +
     47W  LEU*     1.3    59.9    +      -       -      +
     49W  CYS*     3.2     3.9    +      -       -      +
     50W  LEU*     3.0    22.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 47 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    110N  LEU*     3.9    36.1    -      -       +      -
     43W  THR*     3.0    26.0    +      -       +      +
     44W  LEU*     3.1    24.4    +      -       +      +
     46W  SER*     1.3    77.0    -      -       -      +
     48W  TYR*     1.3    62.8    +      -       -      +
     50W  LEU*     3.4    14.5    +      -       +      +
     51W  GLY*     3.0    19.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 48 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     44W  LEU      3.1    11.1    +      -       -      +
     45W  TYR*     3.1    35.6    +      +       -      +
     47W  LEU*     1.3    78.7    -      -       -      +
     49W  CYS*     1.3    61.0    +      -       -      +
     51W  GLY*     3.1     3.5    +      -       -      -
     52W  TRP*     2.9    48.8    +      +       +      +
----------------------------------------------------------
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Residues in contact with CYS 49 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29P  SER*     6.0     0.2    -      -       -      +
     33P  MET*     3.7    37.1    -      -       +      +
     42P  LEU*     4.0    16.8    -      -       +      -
     45W  TYR*     3.0    48.7    +      -       -      -
     46W  SER*     3.5     9.0    -      -       -      +
     48W  TYR*     1.3    79.8    -      -       -      +
     50W  LEU*     1.3    56.0    +      -       -      +
     52W  TRP*     3.4     7.8    +      -       -      +
     53W  ALA*     3.0    29.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 50 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    110N  LEU*     5.4    12.8    -      -       +      -
    114N  ALA*     3.7    39.5    -      -       +      -
    117N  MET*     4.1    14.8    -      -       +      -
    118N  VAL*     4.1     8.3    -      -       +      -
     46W  SER      3.0    12.6    +      -       -      +
     47W  LEU*     3.5    17.7    -      -       +      +
     48W  TYR      3.2     0.2    -      -       -      -
     49W  CYS*     1.3    72.1    -      -       -      +
     51W  GLY*     1.3    71.0    +      -       -      +
     53W  ALA*     3.3     4.3    +      -       -      -
     54W  SER*     2.9    44.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 51 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     47W  LEU      3.0    14.9    +      -       -      -
     48W  TYR*     3.1     4.0    +      -       -      -
     50W  LEU*     1.3    85.0    -      -       -      +
     52W  TRP*     1.3    63.7    +      -       -      +
     54W  SER*     3.4    15.2    +      -       -      -
     55W  PHE*     3.6    15.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with TRP 52 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     33P  MET*     4.8     8.7    -      -       +      -
     37P  PHE*     3.7    35.2    -      +       +      -
     48W  TYR*     2.9    37.0    +      +       +      +
     49W  CYS*     3.5    12.8    -      -       -      +
     51W  GLY*     1.3    79.3    -      -       -      +
     53W  ALA*     1.3    78.7    +      -       +      +
     54W  SER      3.2     1.4    +      -       -      -
     55W  PHE*     3.3     6.1    +      -       -      +
     57W  HIS*     3.1    66.4    +      +       +      -
----------------------------------------------------------
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Residues in contact with ALA 53 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    118N  VAL*     3.7    30.0    -      -       +      +
    119N  GLU*     4.3     6.1    +      -       -      +
     33P  MET*     5.3     0.4    -      -       +      -
     37P  PHE*     3.8    33.4    -      -       +      -
     49W  CYS      3.0    16.8    +      -       -      +
     50W  LEU*     4.0     2.7    -      -       -      +
     52W  TRP*     1.3    86.7    -      -       +      +
     54W  SER*     1.3    61.0    +      -       -      +
     55W  PHE      3.2     6.5    +      -       -      +
     46Y  LYS*     4.9     0.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 54 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    117N  MET*     3.1    47.3    -      -       -      +
    118N  VAL*     4.2     1.5    -      -       -      +
     50W  LEU*     2.9    28.1    +      -       -      +
     51W  GLY*     3.5    10.5    -      -       -      -
     52W  TRP      3.1     0.6    -      -       -      -
     53W  ALA*     1.3    78.8    -      -       -      +
     55W  PHE*     1.3    66.9    +      -       -      +
     42Y  HIS*     3.1    14.5    +      -       -      -
     46Y  LYS*     2.9    25.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 55 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    117N  MET*     5.7     2.0    -      -       +      -
     51W  GLY*     3.6    16.6    -      -       -      -
     52W  TRP      3.3     7.0    +      -       -      +
     53W  ALA*     4.0     5.5    -      -       -      +
     54W  SER*     1.3    84.1    -      -       -      +
     56W  PRO*     1.3    74.8    -      -       +      +
     57W  HIS*     3.1    28.8    +      -       +      +
     42Y  HIS*     3.6    31.0    -      +       -      -
     45Y  LEU*     6.0     2.7    -      -       +      -
     46Y  LYS*     4.8     5.8    -      -       +      -
----------------------------------------------------------
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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