Contacts of the helix formed by residues 38 - 64 (chain P) in PDB entry 1BFR


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 LYS 38 (chain P).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     39N  ARG*     5.1     9.5    -      -       -      +
    157N  GLU*     3.0    28.9    +      -       -      +
     33P  LYS*     5.5     6.1    -      -       +      +
     36P  GLY*     3.0    18.1    +      -       -      +
     37P  LEU*     1.3    70.3    -      -       -      +
     39P  ARG*     1.3    64.0    +      -       -      +
     41P  ASN*     3.1     8.9    +      -       -      +
     42P  ASP*     3.0    29.3    +      -       -      +
    153P  GLN      3.1     6.1    +      -       -      +
    154P  ILE      3.0    22.1    +      -       -      +
    156P  GLU*     3.6    32.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 39 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     38P  LYS*     1.3    71.7    -      -       -      +
     40P  LEU*     1.3    70.3    +      -       -      +
     42P  ASP*     3.2     5.0    +      -       +      +
     43P  VAL*     3.1    33.3    +      -       +      +
    133P  TRP*     3.9    13.7    -      -       -      +
    137P  GLU*     3.1    40.4    +      -       -      -
    152P  ALA*     4.0     1.6    -      -       -      -
    153P  GLN*     2.6    55.4    +      -       -      +
    155P  ARG      3.7    12.6    +      -       -      +
    156P  GLU*     4.5     7.9    -      -       -      +
    157P  GLU*     4.2    25.7    -      -       +      +
     38R  LYS*     5.1     9.3    -      -       -      +
    154R  ILE*     6.0     7.6    -      -       -      +
    155R  ARG*     3.3    25.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 40 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     32P  PHE*     3.7    37.9    -      -       +      -
     37P  LEU*     3.1    15.3    +      -       +      +
     39P  ARG*     1.3    86.7    -      -       -      +
     41P  ASN*     1.3    64.8    +      -       -      +
     43P  VAL*     4.7     1.3    -      -       -      +
     44P  GLU*     3.0    29.9    +      -       -      +
     83P  VAL*     4.2    11.4    -      -       +      -
     87P  LEU*     5.0     3.8    -      -       +      -
    133P  TRP*     4.1    20.0    -      -       +      -
    149P  TYR*     3.6    27.4    -      -       +      +
    150P  LEU*     5.7     0.2    -      -       +      -
    153P  GLN*     3.5    38.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 41 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29P  ALA*     3.1    32.4    -      -       -      +
     30P  ARG*     2.9    27.8    +      -       -      +
     32P  PHE*     3.7     1.6    -      -       -      +
     33P  LYS*     3.4    36.5    -      -       +      +
     37P  LEU      3.0     9.3    +      -       -      +
     38P  LYS*     3.4     9.3    -      -       -      +
     40P  LEU*     1.3    75.5    -      -       -      +
     42P  ASP*     1.3    77.1    +      -       -      +
     45P  TYR*     2.9    25.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 42 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     38P  LYS*     3.0    15.3    +      -       -      +
     39P  ARG*     3.8     5.8    -      -       -      +
     41P  ASN*     1.3    91.5    +      -       -      +
     43P  VAL*     1.3    61.9    +      -       +      +
     45P  TYR*     3.8     3.3    -      -       -      +
     46P  HIS*     2.7    44.4    +      -       +      +
    156P  GLU*     3.3    37.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 43 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     39P  ARG*     3.1    29.0    +      -       +      +
     40P  LEU      4.4     0.2    -      -       -      +
     42P  ASP*     1.3    75.0    -      -       +      +
     44P  GLU*     1.3    63.1    +      -       -      +
     46P  HIS*     3.2     8.6    +      -       +      +
     47P  GLU*     3.0    28.7    +      -       +      +
    133P  TRP*     3.5    55.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 44 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     25P  TYR*     3.5    25.9    -      -       -      +
     28P  HIS*     3.3    20.4    -      -       -      +
     29P  ALA*     3.9    19.3    -      -       +      +
     32P  PHE*     3.8    17.8    -      -       +      -
     40P  LEU      3.0    18.6    +      -       -      +
     43P  VAL*     1.3    74.4    -      -       -      +
     45P  TYR*     1.3    64.0    +      -       -      +
     47P  GLU*     3.1     7.3    +      -       -      +
     48P  SER*     2.9    21.5    +      -       -      -
     87P  LEU*     4.4     2.6    -      -       -      +
     90P  ASP*     2.8    27.9    -      -       -      +
    133P  TRP*     3.5    27.0    -      -       +      -
    134P  LEU*     4.1     3.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 45 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     26P  PHE*     3.6    33.0    -      +       -      -
     29P  ALA*     3.5    11.4    -      -       +      +
     30P  ARG*     3.7    29.2    -      -       -      +
     41P  ASN*     2.9    19.4    +      -       -      +
     42P  ASP*     3.8     3.8    -      -       -      +
     44P  GLU*     1.3    75.7    -      -       -      +
     46P  HIS*     1.3    85.5    +      +       -      +
     48P  SER*     3.1     8.4    -      -       -      -
     49P  ILE*     3.0    44.0    +      -       +      +
    200P  HEM      3.6    29.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with HIS 46 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     42P  ASP*     2.7    35.8    +      -       +      +
     43P  VAL*     3.7     9.5    -      -       +      +
     45P  TYR*     1.3    95.5    -      +       -      +
     47P  GLU*     1.3    65.3    +      -       +      +
     49P  ILE*     3.1    11.5    +      -       +      +
     50P  ASP*     2.9    27.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 47 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     25P  TYR*     3.2    38.2    +      -       +      -
     43P  VAL*     3.0    22.1    +      -       +      +
     44P  GLU*     3.6     9.9    -      -       -      +
     46P  HIS*     1.3    74.3    -      -       +      +
     48P  SER*     1.3    64.1    +      -       -      +
     50P  ASP*     3.2     6.7    +      -       -      +
     51P  GLU*     3.0    27.9    +      -       -      +
    130P  HIS*     3.5    43.6    -      -       +      +
    133P  TRP*     3.8    31.1    -      -       -      +
    134P  LEU*     4.6     1.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 48 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     22P  ILE*     3.2    20.2    +      -       -      +
     25P  TYR*     3.9     8.7    -      -       -      +
     26P  PHE*     3.4    28.5    -      -       -      -
     44P  GLU      2.9    12.4    +      -       -      -
     45P  TYR*     3.1    11.9    -      -       -      -
     47P  GLU*     1.3    74.8    -      -       -      +
     49P  ILE*     1.3    64.4    +      -       -      +
     51P  GLU*     3.1     9.1    +      -       -      +
     52P  MET*     3.0    40.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 49 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45P  TYR*     3.0    56.0    +      -       +      +
     46P  HIS*     3.1    12.3    +      -       +      +
     48P  SER*     1.3    74.3    -      -       -      +
     50P  ASP*     1.3    62.5    +      -       -      +
     52P  MET*     3.2    24.3    -      -       +      +
     53P  LYS*     2.9    31.5    +      -       -      +
    200P  HEM      3.8    52.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 50 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46P  HIS*     2.9    22.3    +      -       -      +
     47P  GLU*     3.5     8.7    -      -       -      +
     49P  ILE*     1.3    71.8    -      -       -      +
     51P  GLU*     1.3    58.9    +      -       -      +
     53P  LYS*     3.4    17.2    +      -       -      +
     54P  HIS*     2.8    41.8    +      -       +      +
    126P  ASP*     5.1     7.5    -      -       -      +
    130P  HIS*     2.8    34.1    +      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 51 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18P  GLU*     2.8    11.2    -      -       -      +
     21P  ALA*     3.9    15.0    -      -       +      +
     22P  ILE*     3.6    24.0    -      -       +      +
     25P  TYR*     3.6    11.6    -      -       +      -
     47P  GLU      3.0    14.3    +      -       -      +
     48P  SER      3.6     2.9    -      -       -      +
     50P  ASP*     1.3    72.8    -      -       -      +
     52P  MET*     1.3    60.2    +      -       -      +
     54P  HIS*     2.8    16.4    +      -       -      +
     55P  ALA*     2.8    31.0    +      -       -      +
     94P  GLU*     3.2     6.6    -      -       -      +
    127P  GLU*     2.9     2.8    -      -       -      +
    130P  HIS*     3.4     5.6    +      -       -      -
    201P   MN      2.0    34.5    +      -       -      -
    202P   MN      2.0    33.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with MET 52 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     22P  ILE*     3.6    22.4    -      -       +      +
     26P  PHE*     4.1     4.0    -      -       +      -
     48P  SER*     3.0    34.8    +      -       -      +
     49P  ILE*     3.2    22.7    -      -       +      +
     51P  GLU*     1.3    75.6    -      -       -      +
     53P  LYS*     1.3    58.0    +      -       -      +
     55P  ALA*     3.2     3.5    +      -       -      +
     56P  ASP*     2.9    27.2    +      -       -      +
    200P  HEM      2.2    99.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 53 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     49P  ILE*     2.9    25.9    +      -       -      +
     50P  ASP*     3.6    17.5    +      -       -      +
     52P  MET*     1.3    73.0    -      -       -      +
     54P  HIS*     1.3    63.8    +      -       +      +
     56P  ASP*     3.4     9.5    +      -       -      +
     57P  ARG*     3.1    26.4    +      -       -      +
    200P  HEM      3.5    42.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with HIS 54 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18P  GLU*     3.6    15.0    -      -       +      +
     50P  ASP*     2.8    30.1    +      -       +      +
     51P  GLU*     2.8    11.9    +      -       -      +
     53P  LYS*     1.3    72.5    -      -       +      +
     55P  ALA*     1.3    64.1    +      -       -      +
     57P  ARG*     3.0    24.1    +      -       -      +
     58P  TYR*     3.1    17.7    +      -       -      -
    123P  ILE*     3.6    29.7    -      -       +      +
    126P  ASP*     2.8    38.5    +      -       +      +
    127P  GLU*     3.1    18.6    -      -       -      -
    130P  HIS*     4.9     0.4    -      +       -      -
    202P   MN      2.5    23.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 55 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     15P  LEU*     3.8    22.3    -      -       +      +
     18P  GLU*     4.2     9.0    -      -       +      +
     19P  LEU*     4.6     3.1    -      -       +      -
     22P  ILE*     4.0    13.5    -      -       +      -
     51P  GLU      2.8    15.4    +      -       -      +
     52P  MET      3.4     8.5    -      -       -      +
     54P  HIS*     1.3    69.4    -      -       -      +
     56P  ASP*     1.3    57.9    +      -       -      +
     58P  TYR*     3.2     8.4    +      -       -      +
     59P  ILE*     2.9    35.6    +      -       +      +
    200P  HEM      4.0    15.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 56 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     26O  PHE*     3.4    23.9    -      -       +      -
     30O  ARG*     2.9    45.1    +      -       -      +
     52P  MET      2.9    12.7    +      -       -      +
     53P  LYS*     3.5    12.3    -      -       -      +
     54P  HIS      3.2     0.2    -      -       -      -
     55P  ALA*     1.3    76.3    -      -       -      +
     57P  ARG*     1.3    61.2    +      -       +      +
     59P  ILE*     3.5     2.3    +      -       -      +
     60P  GLU*     3.0    35.8    +      -       -      +
    200P  HEM      4.3    10.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 57 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     53P  LYS*     3.1    14.0    +      -       +      +
     54P  HIS*     3.0    15.4    +      -       -      +
     56P  ASP*     1.3    73.8    -      -       +      +
     58P  TYR*     1.3    62.1    +      -       -      +
     60P  GLU*     3.4     5.4    +      -       -      +
     61P  ARG*     3.0    23.7    +      -       -      +
    119P  MET*     3.6    40.4    -      -       +      +
    122P  GLU*     3.0    49.0    +      -       -      +
    123P  ILE*     4.1    19.5    -      -       +      +
    126P  ASP*     5.8     1.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 58 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     11P  LEU*     4.2    20.2    -      -       +      +
     14P  LEU*     3.8    29.7    -      -       +      +
     15P  LEU*     4.0    26.7    -      -       +      -
     18P  GLU*     3.7    27.9    +      -       +      -
     54P  HIS      3.1    20.8    +      -       -      -
     55P  ALA*     3.7     4.9    -      -       -      +
     57P  ARG*     1.3    73.8    -      -       -      +
     59P  ILE*     1.4    58.5    +      -       -      +
     61P  ARG*     3.1     4.3    +      -       -      +
     62P  ILE*     2.9    38.1    +      -       +      +
    101P  LEU*     3.7    23.4    -      -       -      +
    119P  MET*     3.5    26.0    -      -       +      -
    120P  MET*     4.4     3.1    -      -       +      -
    123P  ILE*     3.5    27.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 59 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     26O  PHE*     3.8    28.3    -      -       +      -
     27O  LEU*     4.0     9.0    -      -       +      -
     30O  ARG*     3.9    16.8    -      -       +      -
     15P  LEU*     4.0    18.4    -      -       +      +
     55P  ALA      2.9    25.0    +      -       -      +
     56P  ASP*     3.8     5.4    -      -       -      +
     57P  ARG      3.4     0.2    -      -       -      -
     58P  TYR*     1.4    72.9    -      -       -      +
     60P  GLU*     1.3    63.3    +      -       -      +
     62P  ILE*     3.5     1.3    +      -       -      -
     63P  LEU*     3.1    41.7    +      -       +      +
     69P  PRO*     3.8    19.4    -      -       +      +
     71P  LEU*     3.9    26.5    -      -       +      -
    200P  HEM      4.4     5.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 60 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     30O  ARG*     3.2    25.8    +      -       +      +
     33O  LYS*     3.4    30.0    +      -       -      -
     56P  ASP*     3.0    41.8    +      -       -      +
     57P  ARG*     3.9     4.9    -      -       -      +
     58P  TYR      3.3     0.2    -      -       -      -
     59P  ILE*     1.3    77.7    -      -       -      +
     61P  ARG*     1.3    61.5    +      -       -      +
     63P  LEU*     3.5     6.4    +      -       -      +
     64P  PHE*     3.1    22.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 61 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128I  GLU*     2.9    32.3    +      -       -      +
      1P  MET*     5.0     0.6    -      -       -      +
     11P  LEU*     3.9    20.0    -      -       +      -
     57P  ARG      3.0    17.3    +      -       -      +
     58P  TYR      3.1     2.9    +      -       -      +
     60P  GLU*     1.3    74.2    -      -       -      +
     62P  ILE*     1.3    64.0    +      -       -      +
     64P  PHE*     3.2    25.7    +      -       -      +
     65P  LEU*     2.9    42.7    +      -       +      +
    113P  ASP*     3.1    24.5    +      -       -      -
    115P  VAL*     3.7    17.7    -      -       -      +
    116P  SER*     3.0    21.6    +      -       -      +
    119P  MET*     4.0    26.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 62 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8P  ILE*     4.0    13.0    -      -       +      +
     11P  LEU*     3.7    27.4    -      -       +      +
     12P  ASN*     3.6    38.4    -      -       -      +
     15P  LEU*     4.2    10.5    -      -       +      -
     58P  TYR*     2.9    29.7    +      -       +      +
     59P  ILE      4.0     2.9    -      -       -      +
     61P  ARG*     1.3    70.9    -      -       -      +
     63P  LEU*     1.3    63.0    +      -       -      +
     65P  LEU*     3.3     6.2    +      -       -      +
     66P  GLU      3.2     4.5    +      -       -      -
     67P  GLY*     2.9    49.5    +      -       -      -
     68P  LEU      3.7    14.6    -      -       -      +
     69P  PRO*     3.7     5.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 63 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     27O  LEU*     4.5     0.9    -      -       +      -
     30O  ARG*     3.9    30.3    -      -       +      +
     31O  MET*     4.1    21.1    -      -       +      +
     34O  ASN*     3.9    30.5    +      -       +      +
     59P  ILE*     3.1    41.4    +      -       +      +
     60P  GLU*     3.7     5.8    -      -       -      +
     61P  ARG      3.3     0.2    -      -       -      -
     62P  ILE*     1.3    75.4    -      -       -      +
     64P  PHE*     1.3    62.3    +      -       -      +
     66P  GLU*     3.0    16.8    +      -       -      +
     67P  GLY      4.0     8.5    -      -       -      +
     68P  LEU*     5.1     1.6    -      -       +      -
     69P  PRO*     3.4    27.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 64 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128I  GLU*     3.6    30.5    -      -       +      -
    131I  ILE*     4.7     1.6    -      -       +      -
    132I  ASP*     3.7    45.5    -      -       +      +
    135I  GLU*     4.2     3.4    -      -       -      -
     34O  ASN*     4.2     9.9    +      -       -      +
      1P  MET*     2.9    72.7    +      -       +      +
     60P  GLU      3.1    15.3    +      -       -      +
     61P  ARG*     3.2    38.3    +      -       -      +
     63P  LEU*     1.3    73.1    -      -       -      +
     65P  LEU*     1.3    61.9    +      -       +      +
     66P  GLU*     3.0     4.2    +      -       -      +
----------------------------------------------------------
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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