Contacts of the helix formed by residues 10 - 36 (chain F) in PDB entry 1IES


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 THR 10 (chain F).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      5F  ARG*     3.8    17.0    -      -       -      +
      9F  SER*     1.3    70.2    -      -       -      +
     11F  GLU*     1.3    71.2    +      -       -      +
     13F  GLU*     3.7    10.9    -      -       -      +
     14F  ALA*     2.8    32.6    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 11 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      9F  SER*     3.3    12.7    -      -       -      +
     10F  THR*     1.3    87.7    +      -       -      +
     12F  VAL*     1.3    55.7    +      -       -      +
     14F  ALA*     3.7     4.8    -      -       -      +
     15F  ALA*     3.0    27.0    +      -       -      +
    116F  LEU*     3.5    25.8    -      -       +      +
    120F  GLN*     3.8    19.0    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 12 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8F  TYR*     3.4    28.9    -      -       +      +
      9F  SER*     3.3    22.7    +      -       -      +
     10F  THR      3.3     0.2    -      -       -      -
     11F  GLU*     1.3    73.9    -      -       -      +
     13F  GLU*     1.3    56.8    +      -       -      +
     15F  ALA*     2.9     3.0    +      -       -      +
     16F  VAL*     2.8    34.8    +      -       +      +
    113F  LEU*     4.4     1.1    -      -       +      -
    116F  LEU*     3.9    17.9    -      -       +      -
    117F  GLY*     4.6     3.8    -      -       -      -
    120F  GLN*     4.1    15.3    -      -       +      -
    122F  ASP*     4.4     7.6    -      -       -      +
    125F  LEU*     3.8    36.8    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 13 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      5F  ARG*     2.7    37.4    +      -       -      -
      8F  TYR*     3.8    18.8    -      -       +      -
      9F  SER      2.9    16.5    +      -       -      +
     10F  THR*     3.7    14.1    -      -       -      +
     12F  VAL*     1.3    74.5    -      -       -      +
     14F  ALA*     1.3    61.8    +      -       -      +
     16F  VAL      3.5     0.3    +      -       -      -
     17F  ASN*     3.1    21.3    +      -       -      +
     69F  GLN*     3.3    25.2    +      -       -      +
     74F  GLY*     3.6     2.0    -      -       -      -
     75F  ARG*     2.9    36.9    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 14 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     10F  THR      2.8    18.1    +      -       -      +
     11F  GLU*     3.7     5.2    -      -       -      +
     13F  GLU*     1.3    77.8    -      -       -      +
     15F  ALA*     1.4    64.0    -      -       -      +
     17F  ASN*     3.1    11.2    +      -       -      +
     18F  ARG*     3.0    21.3    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 15 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     11F  GLU      3.0    17.7    +      -       -      +
     12F  VAL      2.9     5.3    +      -       -      +
     14F  ALA*     1.4    74.4    -      -       -      +
     16F  VAL*     1.4    60.2    +      -       -      +
     18F  ARG*     3.1    10.1    +      -       -      +
     19F  LEU*     2.9    28.8    +      -       -      +
    113F  LEU*     3.5    28.2    -      -       +      +
    116F  LEU*     3.9     9.2    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 16 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8F  TYR*     3.6    14.8    -      -       -      +
     12F  VAL*     2.8    29.3    +      -       +      +
     13F  GLU      3.7     4.0    -      -       -      +
     15F  ALA*     1.4    71.5    -      -       -      +
     17F  ASN*     1.3    64.3    +      -       -      +
     19F  LEU*     3.1     8.8    +      -       -      +
     20F  VAL*     2.9    25.8    +      -       +      +
     65F  LEU*     4.1    27.8    -      -       +      +
     68F  MET*     3.9    20.6    -      -       +      -
     69F  GLN*     3.7    22.4    -      -       +      +
    113F  LEU*     4.1    16.6    -      -       +      -
    125F  LEU*     4.2     0.7    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ASN 17 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     13F  GLU*     3.1    13.9    +      -       -      +
     14F  ALA*     3.1    12.6    +      -       -      +
     16F  VAL*     1.3    78.3    -      -       -      +
     18F  ARG*     1.3    58.0    +      -       -      +
     20F  VAL*     3.7     8.2    -      -       -      +
     21F  ASN*     3.5    15.8    +      -       -      +
     66F  LEU*     5.2     4.3    -      -       -      +
     69F  GLN*     3.0    17.4    +      -       -      +
     75F  ARG      2.8    24.0    +      -       -      -
     76F  ALA*     3.2     7.3    -      -       -      +
     77F  LEU*     3.0    48.6    +      -       +      +
     79F  GLN*     4.3     9.0    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 18 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     14F  ALA      3.0    11.7    +      -       -      +
     15F  ALA*     3.1    11.4    +      -       -      +
     17F  ASN*     1.3    74.1    -      -       -      +
     19F  LEU*     1.3    66.0    +      -       -      +
     20F  VAL      3.3     0.2    -      -       -      -
     21F  ASN*     3.0     9.1    +      -       +      +
     22F  LEU*     3.0    49.2    +      -       +      +
     79F  GLN*     4.9    13.9    -      -       -      +
    109F  ALA*     4.2    24.9    +      -       -      +
    112F  ASP*     5.7     2.8    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 19 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     15F  ALA      2.9    13.2    +      -       -      +
     16F  VAL*     3.1     8.9    +      -       -      +
     18F  ARG*     1.3    78.6    -      -       -      +
     20F  VAL*     1.3    62.0    +      -       -      +
     22F  LEU*     3.2    10.2    +      -       +      +
     23F  TYR*     2.9    41.9    +      -       +      -
     65F  LEU*     3.8    25.6    -      -       +      -
    106F  LEU*     4.8     1.3    -      -       +      +
    109F  ALA*     3.6    34.5    -      -       +      +
    110F  LEU*     3.6    28.3    -      -       +      +
    113F  LEU*     3.6    25.1    -      -       +      -
    129F  LEU*     4.9     0.2    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 20 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     16F  VAL*     2.9    22.7    +      -       +      +
     17F  ASN*     3.7    12.8    -      -       -      +
     19F  LEU*     1.3    75.4    -      -       -      +
     21F  ASN*     1.3    57.0    +      -       -      +
     23F  TYR*     3.9     3.9    -      -       -      +
     24F  LEU*     3.0    46.0    +      -       +      +
     62F  ALA*     4.1     7.6    -      -       +      +
     65F  LEU*     3.7    29.6    -      -       +      -
     66F  LEU*     3.6    39.9    -      -       +      +
     69F  GLN*     6.1     0.2    -      -       -      +
     77F  LEU      5.8     0.9    -      -       -      +
     78F  PHE*     4.2     9.4    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ASN 21 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     17F  ASN      3.5    10.1    +      -       -      +
     18F  ARG*     3.0    12.8    +      -       +      +
     20F  VAL*     1.3    79.7    -      -       -      +
     22F  LEU*     1.3    61.1    +      -       +      +
     24F  LEU*     3.3     7.1    +      -       -      +
     25F  ARG*     2.8    35.0    +      -       -      +
     77F  LEU      6.1     0.2    -      -       -      +
     78F  PHE*     6.5     0.2    -      -       -      -
     79F  GLN*     3.5    36.4    +      -       -      +
     80F  ASP      3.1    25.8    +      -       -      +
     81F  LEU*     3.7    12.9    -      -       -      +
     82F  GLN      5.7     0.3    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 22 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18F  ARG*     3.0    50.6    +      -       +      +
     19F  LEU*     3.5    11.7    -      -       +      +
     21F  ASN*     1.3    80.8    -      -       -      +
     23F  TYR*     1.3    57.5    +      -       -      +
     25F  ARG*     3.3     5.5    +      -       -      +
     26F  ALA*     2.8    29.6    +      -       -      +
    102F  LEU*     5.8     0.2    -      -       -      +
    105F  SER*     4.7     8.1    -      -       -      +
    106F  LEU*     3.9    21.1    -      -       +      +
    109F  ALA*     3.7    30.7    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with TYR 23 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     19F  LEU*     2.9    48.5    +      -       +      +
     20F  VAL*     4.6     0.2    -      -       -      -
     22F  LEU*     1.3    72.4    -      -       -      +
     24F  LEU*     1.3    53.2    +      -       -      +
     26F  ALA*     3.1     7.4    +      -       -      +
     27F  SER*     2.8    34.3    +      -       -      -
     57F  GLU      5.5     0.2    -      -       -      -
     58F  LYS*     3.6    48.7    -      -       +      +
     61F  GLY*     4.0     4.7    -      -       -      -
     62F  ALA*     3.8    26.9    -      -       +      +
     65F  LEU*     4.0     8.3    -      -       +      -
    106F  LEU*     4.2    17.7    -      -       +      +
    110F  LEU*     3.7    18.7    -      -       +      +
    133F  PHE*     3.4    30.8    -      +       -      -
    136F  GLU*     5.6     4.2    +      -       -      -
    137F  GLU*     3.8    10.6    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 24 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     20F  VAL*     3.0    35.8    +      -       +      +
     21F  ASN*     3.6     4.7    -      -       -      +
     23F  TYR*     1.3    75.3    -      -       -      +
     25F  ARG*     1.3    55.4    +      -       -      +
     27F  SER*     3.3     7.4    -      -       -      -
     28F  TYR*     3.0    26.2    +      -       -      +
     59F  ARG*     4.7    17.0    -      -       +      +
     62F  ALA*     3.4    24.0    -      -       +      -
     63F  GLU*     6.1     1.3    -      -       +      -
     66F  LEU*     5.4     2.7    -      -       +      -
     78F  PHE*     4.4    18.8    -      -       +      -
     81F  LEU*     3.9    31.3    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 25 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     21F  ASN*     2.8    27.2    +      -       -      +
     22F  LEU*     3.8     6.1    -      -       -      +
     24F  LEU*     1.3    73.2    -      -       -      +
     26F  ALA*     1.3    56.6    +      -       -      +
     28F  TYR*     3.2     6.9    +      -       -      +
     29F  THR*     2.9    44.5    +      -       -      -
     81F  LEU*     4.3     6.6    -      -       +      +
     82F  GLN*     3.2    59.9    +      -       +      +
     83F  LYS      3.5    15.5    +      -       -      -
     84F  PRO      4.9     0.2    -      -       -      -
     85F  SER*     4.7    18.7    +      -       -      +
    102F  LEU*     5.2    11.1    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 26 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     22F  LEU      2.8    18.2    +      -       -      +
     23F  TYR      3.1     7.8    +      -       -      +
     25F  ARG*     1.3    68.6    -      -       -      +
     27F  SER*     1.3    66.1    +      -       -      +
     29F  THR*     3.1     4.4    +      -       -      -
     30F  TYR*     2.9    30.1    +      -       +      -
     58F  LYS*     4.1     9.0    -      -       +      -
    102F  LEU*     4.1    27.4    -      -       +      -
    106F  LEU*     3.8    27.1    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 27 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     23F  TYR      2.8    12.7    +      -       -      -
     24F  LEU*     3.3    15.9    -      -       -      -
     26F  ALA*     1.3    75.6    -      -       -      +
     28F  TYR*     1.3    56.1    +      -       -      +
     30F  TYR*     3.2     4.7    +      -       -      +
     31F  LEU*     2.9    26.6    +      -       -      +
     55F  ALA*     2.8    32.9    +      -       -      +
     58F  LYS*     3.8    12.6    -      -       -      +
     59F  ARG*     3.6    16.3    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with TYR 28 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     24F  LEU      3.0    13.3    +      -       -      +
     25F  ARG*     3.2    11.2    +      -       -      +
     27F  SER*     1.3    73.3    -      -       -      +
     29F  THR*     1.3    62.2    +      -       -      +
     31F  LEU*     3.3    23.4    +      -       +      +
     32F  SER*     3.1    20.1    +      -       -      -
     81F  LEU*     4.4    22.0    -      -       +      -
     82F  GLN      3.7    17.5    -      -       -      +
     83F  LYS*     3.7    23.7    -      -       -      +
     84F  PRO*     3.7    16.8    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with THR 29 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     25F  ARG*     2.9    29.1    +      -       -      -
     26F  ALA*     3.1     7.7    +      -       -      -
     28F  TYR*     1.3    76.5    -      -       -      +
     30F  TYR*     1.3    57.7    +      -       -      +
     32F  SER*     3.1     5.2    +      -       -      -
     33F  LEU*     2.8    35.0    +      -       +      +
     84F  PRO*     3.6    18.7    -      -       +      +
     85F  SER*     5.0     3.0    +      -       -      +
     89F  TRP*     3.8    27.5    -      -       +      -
    102F  LEU*     4.0    22.0    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with TYR 30 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     26F  ALA*     2.9    24.3    +      -       +      -
     27F  SER      3.6     4.5    -      -       -      +
     29F  THR*     1.3    70.6    -      -       -      +
     31F  LEU*     1.3    59.8    +      -       -      +
     33F  LEU*     3.7    12.5    -      -       +      +
     34F  GLY*     2.8    29.1    +      -       -      -
     51F  PHE*     3.5    49.2    -      +       -      +
     54F  LEU*     3.7    29.8    -      -       +      -
     55F  ALA*     3.6     9.9    -      -       -      +
     58F  LYS*     4.0    11.9    -      -       +      -
     99F  ALA*     3.6    19.5    +      -       +      -
    102F  LEU*     3.8    18.2    -      -       +      +
    103F  GLU*     2.6    39.0    +      -       -      +
    144F  MET*     3.6     7.8    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 31 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     27F  SER      2.9    13.2    +      -       -      +
     28F  TYR*     3.4    29.2    -      -       +      +
     30F  TYR*     1.3    72.9    -      -       -      +
     32F  SER*     1.3    62.4    +      -       -      +
     34F  GLY*     3.9     0.8    -      -       -      -
     35F  PHE*     3.1    56.7    +      -       +      -
     52F  ARG*     4.8    13.0    -      -       -      +
     55F  ALA*     3.9    13.1    -      -       +      +
     56F  GLU*     5.8     2.7    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 32 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     28F  TYR*     3.1    11.9    +      -       -      -
     29F  THR      3.3     8.1    -      -       -      -
     31F  LEU*     1.3    78.4    -      -       -      +
     33F  LEU*     1.3    64.0    +      -       -      +
     35F  PHE*     3.6     2.8    +      -       -      +
     36F  TYR*     3.2    22.3    +      -       -      +
     84F  PRO*     3.9    16.8    -      -       -      +
     86F  GLN      4.0     5.7    +      -       -      -
     87F  ASP*     4.9     4.0    +      -       -      -
     89F  TRP*     3.0    21.8    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 33 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29F  THR*     2.8    30.0    +      -       +      +
     30F  TYR*     3.7    33.7    -      -       +      +
     32F  SER*     1.3    70.9    +      -       -      +
     34F  GLY*     1.3    63.9    +      -       -      +
     36F  TYR*     3.1    17.7    +      -       -      +
     37F  PHE*     3.2    16.8    -      -       +      -
     51F  PHE*     3.9    20.6    -      -       +      -
     89F  TRP*     3.5    43.3    -      -       +      +
     95F  ALA*     3.7    30.7    -      -       +      +
     98F  ALA*     5.3     1.1    -      -       +      -
     99F  ALA*     4.8     9.0    -      -       +      +
    102F  LEU*     5.6     0.2    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 34 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     30F  TYR      2.8    19.9    +      -       -      -
     31F  LEU      3.9     0.9    -      -       -      -
     33F  LEU*     1.3    73.6    -      -       -      +
     35F  PHE*     1.3    61.8    +      -       -      +
     36F  TYR      3.1     1.0    +      -       -      -
     37F  PHE      3.2     9.9    +      -       -      -
     38F  ASP      3.5     1.2    +      -       -      -
     48F  CYS*     3.4    36.2    -      -       -      +
     51F  PHE*     3.7    15.3    -      -       -      +
     52F  ARG*     4.0     7.9    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE 35 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     31F  LEU*     3.1    51.6    +      -       +      +
     32F  SER*     4.4     3.4    -      -       -      +
     34F  GLY*     1.3    71.6    -      -       -      +
     36F  TYR*     1.3    65.7    +      -       -      +
     37F  PHE      3.4     0.2    -      -       -      -
     38F  ASP*     3.4    34.2    +      -       +      +
     39F  ARG*     3.6     9.2    +      -       -      +
     48F  CYS*     5.7     0.9    -      -       -      -
     52F  ARG*     3.5    42.4    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with TYR 36 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     32F  SER      3.2    12.8    +      -       -      +
     33F  LEU      3.1    10.6    +      -       -      +
     35F  PHE*     1.3    75.7    -      -       -      +
     37F  PHE*     1.3    83.7    +      +       -      +
     39F  ARG*     3.0    64.1    +      -       -      +
     42F  VAL*     3.8    21.5    -      -       +      +
     87F  ASP      4.4     4.7    -      -       -      +
     88F  GLU*     3.8    19.8    +      -       +      +
     89F  TRP*     3.5    34.3    -      +       +      -
     90F  GLY*     2.9    42.1    +      -       -      -
----------------------------------------------------------
 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