Contacts of the helix formed by residues 38 - 64 (chain S) 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 S).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     39K  ARG*     5.1     9.3    -      -       -      +
    157K  GLU*     3.0    28.5    +      -       -      +
     33S  LYS*     5.5     6.3    -      -       +      +
     36S  GLY*     2.9    18.1    +      -       -      +
     37S  LEU*     1.3    70.5    -      -       -      +
     39S  ARG*     1.3    63.9    +      -       -      +
     41S  ASN*     3.2     8.8    +      -       -      +
     42S  ASP*     3.0    30.0    +      -       -      +
    153S  GLN      3.1     5.7    +      -       -      +
    154S  ILE      3.0    23.3    +      -       -      +
    156S  GLU*     3.6    33.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 39 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     38S  LYS*     1.3    70.8    -      -       -      +
     40S  LEU*     1.3    65.6    +      -       -      +
     42S  ASP*     3.3     4.5    +      -       -      +
     43S  VAL*     3.1    36.9    +      -       +      +
    133S  TRP*     4.0    14.1    -      -       -      +
    137S  GLU*     3.1    39.4    +      -       -      -
    152S  ALA*     4.1     2.5    -      -       -      -
    153S  GLN*     2.6    56.8    +      -       -      +
    155S  ARG      3.8    12.2    +      -       -      +
    156S  GLU*     4.6     7.4    -      -       -      +
    157S  GLU*     4.2    24.6    -      -       +      +
     38U  LYS*     5.2     8.5    -      -       -      +
    154U  ILE*     5.9     7.6    -      -       -      +
    155U  ARG*     3.4    23.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 40 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     32S  PHE*     3.7    33.4    -      -       +      -
     37S  LEU*     3.1    17.4    +      -       +      +
     39S  ARG*     1.3    85.2    -      -       -      +
     41S  ASN*     1.3    64.8    +      -       -      +
     43S  VAL*     4.2     1.3    -      -       -      +
     44S  GLU*     3.1    30.0    +      -       -      +
     83S  VAL*     4.2    22.2    -      -       +      -
     87S  LEU*     5.0     3.1    -      -       +      -
    133S  TRP*     4.1    20.0    -      -       +      -
    149S  TYR*     3.6    21.8    -      -       +      +
    150S  LEU*     5.7     0.2    -      -       +      -
    153S  GLN*     3.5    38.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 41 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29S  ALA*     3.1    32.5    -      -       -      +
     30S  ARG*     2.9    28.2    +      -       -      +
     32S  PHE*     3.7     1.4    -      -       -      +
     33S  LYS*     3.4    38.7    -      -       +      +
     37S  LEU      3.1     8.6    +      -       -      +
     38S  LYS*     3.2    10.8    +      -       -      +
     40S  LEU*     1.3    75.8    -      -       -      +
     42S  ASP*     1.3    77.0    +      -       -      +
     45S  TYR*     2.9    25.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 42 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     38S  LYS*     3.0    16.5    +      -       -      +
     39S  ARG*     3.3     5.1    +      -       -      +
     41S  ASN*     1.3    88.3    +      -       -      +
     43S  VAL*     1.3    62.1    +      -       +      +
     45S  TYR*     3.8     3.6    -      -       -      +
     46S  HIS*     2.7    43.9    +      -       +      +
    156S  GLU*     3.3    38.0    -      -       -      +
    157S  GLU      5.5     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 43 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     39S  ARG*     3.1    29.1    +      -       +      +
     40S  LEU      4.4     0.7    -      -       -      +
     42S  ASP*     1.3    74.1    -      -       +      +
     44S  GLU*     1.3    63.1    +      -       -      +
     46S  HIS*     3.2     8.3    +      -       +      +
     47S  GLU*     3.0    30.3    +      -       +      +
    133S  TRP*     3.5    56.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 44 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     25S  TYR*     3.5    25.3    -      -       -      +
     28S  HIS*     3.3    20.6    -      -       -      +
     29S  ALA*     3.9    19.1    -      -       +      +
     32S  PHE*     3.8    17.4    -      -       +      -
     40S  LEU      3.1    19.0    +      -       -      +
     43S  VAL*     1.3    73.4    -      -       -      +
     45S  TYR*     1.3    62.7    +      -       -      +
     47S  GLU*     3.2     7.7    +      -       -      +
     48S  SER*     2.9    22.2    +      -       -      -
     87S  LEU*     4.4     3.1    -      -       -      +
     90S  ASP*     2.7    27.8    -      -       -      +
    133S  TRP*     3.6    26.2    -      -       +      -
    134S  LEU*     4.1     2.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 45 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     26S  PHE*     3.6    32.5    -      +       -      -
     29S  ALA*     3.4    11.6    -      -       +      +
     30S  ARG*     3.7    28.3    -      -       -      +
     41S  ASN*     2.9    20.3    +      -       -      +
     42S  ASP*     3.8     4.0    -      -       -      +
     44S  GLU*     1.3    75.7    -      -       -      +
     46S  HIS*     1.3    84.3    +      +       -      +
     48S  SER*     3.2     8.2    -      -       -      -
     49S  ILE*     3.0    44.3    +      -       +      +
    200T  HEM      3.6    29.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with HIS 46 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     42S  ASP*     2.7    35.6    +      -       +      +
     43S  VAL*     3.6     8.4    -      -       +      +
     45S  TYR*     1.3    96.8    -      +       -      +
     47S  GLU*     1.3    65.5    +      -       +      +
     49S  ILE*     3.2    10.1    +      -       +      +
     50S  ASP*     2.9    28.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 47 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     25S  TYR*     3.2    39.0    +      -       +      -
     43S  VAL*     3.0    20.7    +      -       +      +
     44S  GLU*     3.2    14.3    +      -       -      +
     46S  HIS*     1.3    73.2    -      -       +      +
     48S  SER*     1.3    63.6    +      -       -      +
     50S  ASP*     3.1     7.4    +      -       -      +
     51S  GLU*     3.1    27.4    +      -       -      +
    130S  HIS*     3.5    44.4    -      -       +      +
    133S  TRP*     3.8    27.1    -      -       -      +
    134S  LEU*     4.6     1.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 48 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     22S  ILE*     3.3    19.7    +      -       -      +
     25S  TYR*     3.9     8.6    -      -       -      +
     26S  PHE*     3.4    29.5    -      -       -      -
     44S  GLU      2.9    11.5    +      -       -      -
     45S  TYR*     3.2    11.4    -      -       -      -
     47S  GLU*     1.3    74.3    -      -       -      +
     49S  ILE*     1.3    62.3    +      -       -      -
     51S  GLU*     3.1     8.9    +      -       -      +
     52S  MET*     3.0    41.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 49 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45S  TYR*     3.0    51.0    +      -       +      +
     46S  HIS*     3.2    12.1    +      -       +      +
     48S  SER*     1.3    73.7    -      -       -      +
     50S  ASP*     1.3    62.2    +      -       -      +
     52S  MET*     3.2    15.5    -      -       +      +
     53S  LYS*     2.9    32.4    +      -       -      +
    200T  HEM      3.8    60.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 50 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46S  HIS*     2.9    22.6    +      -       -      +
     47S  GLU*     3.4     9.0    -      -       -      +
     49S  ILE*     1.3    71.8    -      -       -      +
     51S  GLU*     1.3    59.1    +      -       -      +
     53S  LYS*     3.4    16.6    +      -       -      +
     54S  HIS*     2.9    41.6    +      -       +      +
    126S  ASP*     5.1     6.9    -      -       -      +
    130S  HIS*     2.8    34.1    +      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 51 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18S  GLU*     2.8    11.2    -      -       -      +
     21S  ALA*     3.9    15.1    -      -       +      +
     22S  ILE*     3.6    24.6    -      -       +      +
     25S  TYR*     3.6    10.4    -      -       +      -
     47S  GLU      3.1    13.1    +      -       -      +
     48S  SER      3.1     3.3    +      -       -      +
     50S  ASP*     1.3    71.3    -      -       -      +
     52S  MET*     1.3    56.5    +      -       -      +
     54S  HIS*     2.8    15.1    +      -       -      +
     55S  ALA*     2.8    35.0    +      -       -      +
     94S  GLU*     3.2     5.7    -      -       -      +
    127S  GLU*     2.9     2.3    -      -       -      +
    130S  HIS*     3.4     6.2    +      -       -      -
    201S   MN      2.1    35.1    +      -       -      -
    202S   MN      2.0    34.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with MET 52 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     22S  ILE*     3.5    22.2    -      -       +      +
     26S  PHE*     4.1     3.6    -      -       +      -
     48S  SER*     3.0    38.6    +      -       -      +
     49S  ILE*     3.2    20.2    -      -       +      +
     51S  GLU*     1.3    74.5    -      -       -      +
     53S  LYS*     1.3    61.9    +      -       -      +
     55S  ALA*     3.2     2.9    +      -       -      +
     56S  ASP*     3.0    21.0    +      -       -      +
    200T  HEM      2.2   101.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 53 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     49S  ILE*     2.9    25.4    +      -       -      +
     50S  ASP*     3.6    17.7    +      -       -      +
     52S  MET*     1.3    75.4    -      -       -      +
     54S  HIS*     1.3    65.2    +      -       +      +
     56S  ASP*     3.4     8.8    +      -       -      +
     57S  ARG*     3.1    26.3    +      -       -      +
    200T  HEM      3.5    41.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with HIS 54 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18S  GLU*     3.6    14.8    -      -       -      +
     50S  ASP*     2.9    29.1    +      -       +      +
     51S  GLU*     2.8    12.3    +      -       -      +
     53S  LYS*     1.3    72.8    -      -       +      +
     55S  ALA*     1.3    64.5    +      -       -      +
     57S  ARG*     2.9    24.0    +      -       -      +
     58S  TYR*     3.1    17.9    +      -       +      -
    123S  ILE*     3.6    30.6    -      -       +      +
    126S  ASP*     2.8    38.5    +      -       +      -
    127S  GLU*     3.1    18.4    -      -       -      -
    130S  HIS*     4.9     0.4    -      +       -      -
    202S   MN      2.5    24.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 55 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     15S  LEU*     3.8    21.5    -      -       +      +
     18S  GLU*     4.2     8.6    -      -       +      +
     19S  LEU*     4.6     3.4    -      -       +      -
     22S  ILE*     4.0    13.9    -      -       +      -
     51S  GLU      2.8    15.2    +      -       -      +
     52S  MET      3.4     3.6    -      -       -      +
     54S  HIS*     1.3    69.6    -      -       -      +
     56S  ASP*     1.3    62.8    +      -       -      +
     58S  TYR*     3.2     8.4    +      -       -      +
     59S  ILE*     2.9    27.8    +      -       -      +
    200T  HEM      3.4    22.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 56 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     52S  MET      3.0    13.5    +      -       -      +
     53S  LYS*     3.6    12.5    -      -       -      +
     54S  HIS      3.2     0.2    -      -       -      -
     55S  ALA*     1.3    76.0    -      -       -      +
     57S  ARG*     1.3    60.5    +      -       +      +
     59S  ILE*     3.5     2.1    +      -       -      +
     60S  GLU*     3.0    34.5    +      -       -      +
     26T  PHE*     3.4    20.9    -      -       +      -
     30T  ARG*     2.9    45.7    +      -       -      +
    200T  HEM      3.6    13.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 57 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     53S  LYS*     3.1    14.7    +      -       -      +
     54S  HIS*     2.9    19.2    +      -       -      +
     56S  ASP*     1.3    72.2    -      -       +      +
     58S  TYR*     1.3    61.0    +      -       -      +
     60S  GLU*     3.5     5.5    +      -       -      +
     61S  ARG*     3.0    24.3    +      -       -      +
    119S  MET*     3.7    37.9    -      -       -      +
    122S  GLU*     3.0    48.6    +      -       -      +
    123S  ILE*     4.1    19.1    -      -       +      +
    126S  ASP*     5.8     1.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 58 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     11S  LEU*     4.2    20.2    -      -       +      +
     14S  LEU*     3.8    31.1    -      -       +      +
     15S  LEU*     4.0    26.7    -      -       +      -
     18S  GLU*     3.8    26.8    +      -       +      -
     54S  HIS      3.1    20.5    +      -       -      -
     55S  ALA*     3.7     4.5    -      -       -      +
     57S  ARG*     1.3    75.4    -      -       -      +
     59S  ILE*     1.4    61.8    +      -       -      +
     61S  ARG*     3.1     4.9    +      -       -      +
     62S  ILE*     2.9    32.8    +      -       +      +
    101S  LEU*     3.7    23.7    -      -       -      +
    119S  MET*     3.5    26.9    -      -       +      -
    120S  MET*     4.4     3.1    -      -       +      -
    123S  ILE*     3.6    27.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 59 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     15S  LEU*     4.0    17.5    -      -       +      -
     55S  ALA      2.9    24.9    +      -       -      +
     56S  ASP*     3.8     4.7    -      -       -      +
     58S  TYR*     1.4    70.0    -      -       -      +
     60S  GLU*     1.3    63.9    +      -       -      +
     62S  ILE*     4.8     0.7    -      -       -      -
     63S  LEU*     3.1    41.0    +      -       +      +
     69S  PRO*     3.8    19.1    -      -       +      +
     71S  LEU*     3.8    27.1    -      -       +      -
     26T  PHE*     3.8    27.6    -      -       +      -
     27T  LEU*     4.0     8.7    -      -       +      -
     30T  ARG*     3.9    18.6    -      -       +      -
    200T  HEM      4.0     9.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 60 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     56S  ASP*     3.0    42.2    +      -       -      +
     57S  ARG*     3.9     5.2    -      -       -      +
     59S  ILE*     1.3    77.0    -      -       -      +
     61S  ARG*     1.3    60.0    +      -       -      +
     63S  LEU*     3.5     7.0    +      -       +      +
     64S  PHE*     3.1    23.0    +      -       -      +
     30T  ARG*     3.2    24.7    +      -       +      +
     33T  LYS*     3.4    31.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 61 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128R  GLU*     2.8    34.1    +      -       -      +
      1S  MET*     5.0     0.8    -      -       -      +
     11S  LEU*     4.0    20.9    -      -       +      -
     57S  ARG      3.0    17.8    +      -       -      +
     58S  TYR      3.7     2.5    -      -       -      +
     60S  GLU*     1.3    70.5    -      -       -      +
     62S  ILE*     1.3    66.9    +      -       -      +
     64S  PHE*     3.2    26.3    +      -       -      +
     65S  LEU*     2.9    43.4    +      -       +      +
    113S  ASP*     3.1    25.1    +      -       -      -
    115S  VAL*     3.7    16.3    -      -       -      +
    116S  SER*     3.0    21.4    +      -       -      +
    119S  MET*     4.0    24.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 62 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8S  ILE*     4.0    12.3    -      -       +      +
     11S  LEU*     3.7    28.9    -      -       +      +
     12S  ASN*     3.6    38.4    -      -       -      +
     15S  LEU*     4.2    10.3    -      -       +      -
     58S  TYR      2.9    29.5    +      -       -      +
     59S  ILE      4.0     2.9    -      -       -      +
     61S  ARG*     1.3    72.0    -      -       -      +
     63S  LEU*     1.3    59.4    +      -       -      +
     65S  LEU*     3.3     6.2    +      -       -      +
     66S  GLU      3.1     4.5    +      -       -      -
     67S  GLY*     2.9    49.4    +      -       -      -
     68S  LEU      3.7     6.7    -      -       -      +
     69S  PRO*     3.7    15.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 63 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     59S  ILE*     3.1    40.8    +      -       +      +
     60S  GLU*     3.7     6.7    -      -       -      +
     61S  ARG      3.3     0.2    -      -       -      -
     62S  ILE*     1.3    75.2    -      -       -      +
     64S  PHE*     1.3    62.6    +      -       -      +
     66S  GLU*     3.0    16.3    +      -       -      +
     67S  GLY      4.0     9.0    -      -       -      +
     68S  LEU*     5.8     1.8    -      -       +      -
     69S  PRO*     3.4    27.8    -      -       +      -
     27T  LEU*     4.5     1.1    -      -       +      -
     30T  ARG*     3.9    27.1    -      -       +      +
     31T  MET*     4.1    19.3    -      -       +      +
     34T  ASN*     3.9    33.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 64 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128R  GLU*     3.7    22.9    -      -       +      -
    131R  ILE*     4.6     1.6    -      -       +      -
    132R  ASP*     3.6    47.3    -      -       +      +
    135R  GLU*     4.0     5.4    -      -       -      -
      1S  MET*     2.9    76.8    +      -       +      +
     60S  GLU      3.1    15.0    +      -       -      +
     61S  ARG*     3.2    38.6    +      -       -      +
     63S  LEU*     1.3    74.2    -      -       -      +
     65S  LEU*     1.3    63.3    +      -       +      +
     66S  GLU*     3.1     4.7    +      -       -      +
     34T  ASN*     4.2    10.2    +      -       -      +
----------------------------------------------------------
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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