Contacts of the helix formed by residues 38 - 64 (chain O) 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 O).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     39I  ARG*     5.2     9.1    -      -       -      +
    157I  GLU*     2.9    29.5    +      -       -      +
    158I  GLY*     6.0     0.2    -      -       -      -
     33O  LYS*     5.5     6.7    -      -       +      +
     36O  GLY*     2.9    17.2    +      -       -      +
     37O  LEU*     1.3    70.3    -      -       -      +
     39O  ARG*     1.3    63.1    +      -       -      +
     41O  ASN*     3.2     8.8    +      -       -      +
     42O  ASP*     3.0    29.1    +      -       -      +
    153O  GLN      3.1     5.9    +      -       -      +
    154O  ILE      3.0    23.4    +      -       -      +
    156O  GLU*     3.6    33.4    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 39 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     38O  LYS*     1.3    71.8    -      -       -      +
     40O  LEU*     1.3    70.6    +      -       -      +
     42O  ASP*     3.3     5.1    +      -       -      +
     43O  VAL*     3.1    32.3    +      -       +      +
    133O  TRP*     4.0    14.0    -      -       -      +
    137O  GLU*     3.1    40.0    +      -       -      -
    140O  LEU*     6.2     0.2    -      -       -      +
    152O  ALA*     4.1     1.8    -      -       -      -
    153O  GLN*     2.6    55.7    +      -       -      +
    155O  ARG      3.8    11.5    +      -       -      +
    156O  GLU*     4.6     8.1    -      -       -      +
    157O  GLU*     4.2    25.9    -      -       +      +
     38W  LYS*     5.1     8.7    -      -       -      +
    154W  ILE*     6.0     6.0    -      -       -      +
    155W  ARG*     3.5    23.9    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 40 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     32O  PHE*     3.7    34.5    -      -       +      -
     37O  LEU*     3.1    18.0    +      -       +      +
     39O  ARG*     1.3    85.8    -      -       -      +
     41O  ASN*     1.3    63.7    +      -       -      +
     43O  VAL*     4.7     1.3    -      -       -      +
     44O  GLU*     3.1    30.1    +      -       -      +
     83O  VAL*     4.2    22.0    -      -       +      -
     87O  LEU*     5.0     2.9    -      -       +      -
    133O  TRP*     4.1    20.0    -      -       +      -
    149O  TYR*     3.6    21.1    -      -       +      +
    150O  LEU*     5.7     0.2    -      -       +      -
    153O  GLN*     3.5    38.5    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASN 41 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29O  ALA*     3.1    33.0    -      -       -      +
     30O  ARG*     2.9    27.3    +      -       -      +
     32O  PHE*     3.7     1.6    -      -       -      +
     33O  LYS*     3.4    38.3    -      -       +      +
     37O  LEU      3.1     8.4    +      -       -      +
     38O  LYS*     3.2     9.8    +      -       -      +
     40O  LEU*     1.3    75.7    -      -       -      +
     42O  ASP*     1.3    76.3    +      -       -      +
     45O  TYR*     2.9    24.9    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASP 42 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     38O  LYS*     3.0    17.2    +      -       -      +
     39O  ARG*     3.3     5.4    +      -       -      +
     41O  ASN*     1.3    88.9    +      -       -      +
     43O  VAL*     1.3    60.2    +      -       +      +
     45O  TYR*     3.8     3.4    -      -       -      +
     46O  HIS*     2.7    44.3    +      -       +      +
    156O  GLU*     3.3    37.9    -      -       -      +
    157O  GLU      5.5     0.2    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 43 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     39O  ARG*     3.1    28.4    +      -       +      +
     40O  LEU      4.4     0.7    -      -       -      +
     42O  ASP*     1.3    74.1    -      -       +      +
     44O  GLU*     1.3    62.8    +      -       -      +
     46O  HIS*     3.2     8.1    +      -       +      +
     47O  GLU*     3.0    30.2    +      -       +      +
    133O  TRP*     3.5    55.6    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 44 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     25O  TYR*     3.5    26.3    -      -       +      +
     28O  HIS*     3.3    20.3    -      -       -      +
     29O  ALA*     3.9    19.3    -      -       +      +
     32O  PHE*     3.8    17.1    -      -       +      -
     40O  LEU      3.1    19.1    +      -       -      +
     43O  VAL*     1.3    73.6    -      -       -      +
     45O  TYR*     1.3    64.3    +      -       -      +
     47O  GLU*     3.2     7.8    +      -       -      +
     48O  SER*     2.9    22.2    +      -       -      -
     87O  LEU*     4.6     2.7    -      -       -      -
     90O  ASP*     2.7    28.6    -      -       -      +
    133O  TRP*     3.6    27.0    -      -       +      -
    134O  LEU*     4.1     3.3    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with TYR 45 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     26O  PHE*     3.6    31.4    -      +       -      -
     29O  ALA*     3.4    11.5    -      -       +      +
     30O  ARG*     3.7    28.0    -      -       -      +
     41O  ASN*     2.9    22.0    +      -       -      +
     42O  ASP*     3.8     4.3    -      -       -      +
     44O  GLU*     1.3    74.7    -      -       -      +
     46O  HIS*     1.3    83.5    +      +       -      +
     48O  SER*     3.2     8.0    -      -       -      -
     49O  ILE*     3.0    44.5    +      -       +      +
    200P  HEM      3.6    29.7    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with HIS 46 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     42O  ASP*     2.7    35.1    +      -       +      +
     43O  VAL*     3.6     8.9    -      -       +      +
     45O  TYR*     1.3    96.2    -      +       -      +
     47O  GLU*     1.3    64.5    +      -       +      +
     49O  ILE*     3.2    10.5    +      -       +      +
     50O  ASP*     2.9    27.4    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 47 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     25O  TYR*     3.2    38.8    +      -       +      -
     43O  VAL*     3.0    20.6    +      -       +      +
     44O  GLU*     3.6    14.5    -      -       -      +
     46O  HIS*     1.3    73.4    -      -       +      +
     48O  SER*     1.3    63.1    +      -       -      +
     50O  ASP*     3.1     6.9    +      -       -      +
     51O  GLU*     3.1    27.5    +      -       -      +
    130O  HIS*     3.5    42.9    -      -       +      +
    133O  TRP*     3.8    27.2    -      -       -      +
    134O  LEU*     4.6     1.2    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 48 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     22O  ILE*     3.3    19.9    +      -       -      +
     25O  TYR*     3.9     8.8    -      -       -      +
     26O  PHE*     3.4    29.7    -      -       -      -
     44O  GLU      2.9    12.7    +      -       -      -
     45O  TYR      3.2    11.0    -      -       -      -
     47O  GLU*     1.3    72.9    -      -       -      +
     49O  ILE*     1.3    62.8    +      -       -      +
     51O  GLU*     3.1     8.7    +      -       -      +
     52O  MET*     3.0    40.7    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 49 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45O  TYR*     3.0    51.1    +      -       +      +
     46O  HIS*     3.2    13.0    +      -       +      +
     48O  SER*     1.3    73.4    -      -       -      +
     50O  ASP*     1.3    62.0    +      -       -      +
     52O  MET*     3.2    16.5    -      -       +      +
     53O  LYS*     2.9    32.6    +      -       -      +
    200P  HEM      3.8    59.2    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASP 50 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46O  HIS*     2.9    23.2    +      -       -      +
     47O  GLU*     3.1     9.5    +      -       -      +
     49O  ILE*     1.3    71.8    -      -       -      +
     51O  GLU*     1.3    59.8    +      -       -      +
     53O  LYS*     3.4    16.1    +      -       -      +
     54O  HIS*     2.9    40.8    +      -       +      +
    126O  ASP*     5.1     7.3    -      -       -      +
    130O  HIS*     2.8    31.5    +      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 51 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18O  GLU*     2.8    11.9    -      -       -      +
     21O  ALA*     3.9    15.5    -      -       +      +
     22O  ILE*     3.6    25.2    -      -       +      +
     25O  TYR*     3.6    10.4    -      -       +      -
     47O  GLU      3.1    13.3    +      -       -      +
     48O  SER*     3.1     3.3    +      -       -      +
     50O  ASP*     1.3    71.2    -      -       -      +
     52O  MET*     1.3    55.7    +      -       -      +
     54O  HIS*     2.8    15.3    +      -       -      +
     55O  ALA*     2.8    34.8    +      -       -      +
     94O  GLU*     3.2     6.1    -      -       -      +
    127O  GLU*     2.9     2.3    -      -       -      +
    130O  HIS*     3.4     5.6    +      -       -      -
    201O   MN      2.1    35.3    +      -       -      -
    202O   MN      2.0    34.9    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with MET 52 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     22O  ILE*     3.5    23.2    -      -       +      +
     26O  PHE*     4.1     3.8    -      -       +      -
     48O  SER*     3.0    37.5    +      -       -      +
     49O  ILE*     3.2    19.5    -      -       +      +
     51O  GLU*     1.3    75.2    -      -       -      +
     53O  LYS*     1.3    62.7    +      -       -      +
     55O  ALA*     3.2     3.1    +      -       -      +
     56O  ASP*     3.0    20.4    +      -       -      +
    200P  HEM      2.2   101.5    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 53 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     49O  ILE*     2.9    24.8    +      -       -      +
     50O  ASP*     3.6    18.7    +      -       -      +
     52O  MET*     1.3    77.1    -      -       -      +
     54O  HIS*     1.3    65.5    +      -       +      +
     56O  ASP*     3.4     8.8    +      -       -      +
     57O  ARG*     3.1    26.5    +      -       -      +
    200P  HEM      3.5    42.4    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with HIS 54 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18O  GLU*     3.6    15.5    -      -       +      +
     50O  ASP*     2.9    28.3    +      -       +      +
     51O  GLU*     2.8    12.6    +      -       -      +
     53O  LYS*     1.3    73.2    -      -       +      +
     55O  ALA*     1.3    63.9    +      -       -      +
     57O  ARG*     2.9    23.6    +      -       -      +
     58O  TYR*     3.1    17.7    +      -       -      -
    123O  ILE*     3.6    30.4    -      -       +      +
    126O  ASP*     2.8    37.6    +      -       +      -
    127O  GLU*     3.1    17.7    -      -       -      -
    130O  HIS*     4.9     0.7    -      +       -      -
    202O   MN      2.5    24.8    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 55 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     15O  LEU*     3.8    21.9    -      -       +      +
     18O  GLU*     4.2     8.2    -      -       +      +
     19O  LEU*     4.6     2.7    -      -       +      -
     22O  ILE*     4.0    13.9    -      -       +      -
     51O  GLU      2.8    15.8    +      -       -      +
     52O  MET      3.4     4.0    -      -       -      +
     54O  HIS*     1.3    69.3    -      -       -      +
     56O  ASP*     1.3    63.3    +      -       -      +
     58O  TYR*     3.2     8.6    +      -       -      +
     59O  ILE*     2.9    27.1    +      -       -      +
    200P  HEM      3.4    22.7    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ASP 56 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     52O  MET      3.0    12.6    +      -       -      +
     53O  LYS*     3.6    12.9    -      -       -      +
     54O  HIS      3.2     0.2    -      -       -      -
     55O  ALA*     1.3    76.6    -      -       -      +
     57O  ARG*     1.3    61.2    +      -       +      +
     59O  ILE*     3.5     2.4    +      -       -      +
     60O  GLU*     3.0    34.4    +      -       -      +
     26P  PHE*     3.4    21.6    -      -       +      -
     30P  ARG*     2.9    46.3    +      -       -      +
    200P  HEM      3.6    12.5    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 57 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     53O  LYS      3.1    14.9    +      -       -      +
     54O  HIS*     2.9    17.3    +      -       -      +
     56O  ASP*     1.3    71.3    -      -       +      +
     58O  TYR*     1.3    62.5    +      -       -      +
     60O  GLU*     3.5     5.4    +      -       -      +
     61O  ARG*     3.0    23.9    +      -       -      +
    119O  MET*     3.7    39.0    -      -       -      +
    122O  GLU*     3.0    48.4    +      -       -      +
    123O  ILE*     4.1    20.6    -      -       +      +
    126O  ASP*     5.8     1.6    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with TYR 58 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     11O  LEU*     4.2    20.4    -      -       +      +
     14O  LEU*     3.8    30.1    -      -       +      +
     15O  LEU*     4.0    26.9    -      -       +      -
     18O  GLU*     3.8    27.6    +      -       +      -
     54O  HIS      3.1    20.8    +      -       -      -
     55O  ALA*     3.7     4.7    -      -       -      +
     57O  ARG*     1.3    74.3    -      -       -      +
     59O  ILE*     1.4    63.1    +      -       -      +
     61O  ARG*     3.1     4.9    +      -       -      +
     62O  ILE*     2.9    32.9    +      -       +      +
    101O  LEU*     3.7    23.0    -      -       -      +
    119O  MET*     3.5    27.8    -      -       +      -
    120O  MET*     4.4     2.9    -      -       +      -
    123O  ILE*     3.6    27.4    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 59 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     15O  LEU*     4.0    18.2    -      -       +      -
     55O  ALA      2.9    24.5    +      -       -      +
     56O  ASP*     3.8     4.0    -      -       -      +
     58O  TYR*     1.4    69.1    -      -       -      +
     60O  GLU*     1.3    62.8    +      -       -      +
     62O  ILE*     4.7     0.8    -      -       -      +
     63O  LEU*     3.1    42.4    +      -       +      +
     69O  PRO*     3.8    18.6    -      -       +      +
     71O  LEU*     3.8    26.9    -      -       +      -
     26P  PHE*     3.8    28.5    -      -       +      -
     27P  LEU*     4.0     8.7    -      -       +      -
     30P  ARG*     3.9    18.6    -      -       +      -
    200P  HEM      4.0     9.0    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 60 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     56O  ASP*     3.0    40.7    +      -       -      +
     57O  ARG*     3.9     5.4    -      -       -      +
     59O  ILE*     1.3    77.6    -      -       -      +
     61O  ARG*     1.3    61.1    +      -       -      +
     63O  LEU*     3.5     7.0    +      -       +      +
     64O  PHE*     3.1    22.3    +      -       -      +
     30P  ARG*     3.2    24.7    +      -       +      +
     33P  LYS*     3.4    30.5    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 61 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128N  GLU*     2.8    33.5    +      -       -      +
      1O  MET*     5.0     0.2    -      -       -      +
     11O  LEU*     4.0    20.0    -      -       +      -
     57O  ARG      3.0    17.8    +      -       -      +
     58O  TYR      3.7     2.7    -      -       -      +
     60O  GLU*     1.3    71.7    -      -       -      +
     62O  ILE*     1.3    66.6    +      -       -      +
     64O  PHE*     3.2    26.3    +      -       -      +
     65O  LEU*     2.9    43.2    +      -       +      +
    113O  ASP*     3.1    24.7    +      -       -      -
    115O  VAL*     3.7    16.6    -      -       -      +
    116O  SER*     3.0    22.0    +      -       -      +
    119O  MET*     4.0    25.4    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 62 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8O  ILE*     4.0    12.1    -      -       +      +
     11O  LEU*     3.7    27.4    -      -       +      +
     12O  ASN*     3.6    38.6    -      -       -      +
     15O  LEU*     4.2    11.0    -      -       +      -
     58O  TYR*     2.9    29.1    +      -       +      +
     59O  ILE      4.0     3.4    -      -       -      +
     61O  ARG*     1.3    72.1    -      -       -      +
     63O  LEU*     1.3    60.5    +      -       -      +
     65O  LEU*     3.3     5.8    +      -       -      -
     66O  GLU      3.1     4.7    +      -       -      -
     67O  GLY*     2.9    50.5    +      -       -      -
     68O  LEU      3.7     6.7    -      -       -      +
     69O  PRO*     3.7    14.4    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 63 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     59O  ILE*     3.1    41.4    +      -       +      +
     60O  GLU*     3.7     7.2    -      -       +      +
     62O  ILE*     1.3    75.2    -      -       -      +
     64O  PHE*     1.3    61.6    +      -       -      +
     66O  GLU*     3.0    16.5    +      -       -      +
     67O  GLY      4.0     9.0    -      -       -      +
     68O  LEU*     5.8     1.6    -      -       +      -
     69O  PRO*     3.4    27.8    -      -       +      -
     27P  LEU*     4.5     1.1    -      -       +      -
     30P  ARG*     3.9    27.1    -      -       +      +
     31P  MET*     4.1    20.4    -      -       +      +
     34P  ASN*     3.9    34.0    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE 64 (chain O). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128N  GLU*     3.6    23.6    -      -       +      -
    131N  ILE*     4.6     1.8    -      -       +      -
    132N  ASP*     3.6    46.7    -      -       +      +
    135N  GLU*     4.1     5.6    -      -       -      -
      1O  MET*     2.9    76.1    +      -       +      +
     60O  GLU      3.1    14.1    +      -       -      +
     61O  ARG*     3.2    38.8    +      -       -      +
     63O  LEU*     1.3    76.4    -      -       -      +
     65O  LEU*     1.3    62.7    +      -       +      +
     66O  GLU*     3.0     4.4    +      -       -      +
     34P  ASN*     4.2    10.2    +      -       -      +
----------------------------------------------------------
 Back to top of page


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