Contacts of the helix formed by residues 86 - 109 (chain F) in PDB entry 2POZ


Residue contacts within the protein are derived with the CSU software (Sobolev V., Sorokine A., Prilusky J., Abola E.E. and Edelman M. (1999) Automated analysis of interatomic contacts in proteins. Bioinformatics, 15, 327-332). A short description of the analytical approach is given at the end of the page.
For CSU analysis of other PDB entry

Note:
Non-standard 3 letter residue codes indicate a heterogroup. To identify and analyse, use LPC software

Legend:
Dist - nearest distance (Å) between atoms of two residues
Surf - contact surface area (Å2) between two residues
HB   - hydrophilic-hydrophilic contact (hydrogen bond)
Arom - aromatic-aromatic contact
Phob - hydrophobic-hydrophobic contact
DC   - hydrophobic-hydrophilic contact (destabilizing contact)
+/-  - indicates presence/absence of a specific contacts
*    - indicates residues forming contacts  by their side chain
       (including CA atoms)
Residues in contact with GLY 86 (chain F).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     84A  ASN      5.3     0.9    -      -       -      -
     85A  GLY      4.9     0.4    -      -       -      -
     86A  GLY*     4.0    27.1    -      -       -      -
     87A  ALA      4.9     1.6    -      -       -      +
     85F  GLY*     1.3    72.8    -      -       -      -
     87F  ALA*     1.3    66.4    +      -       -      -
     88F  ILE      3.4     2.9    -      -       -      -
     89F  ILE*     3.1    21.9    -      -       -      +
     90F  PHE*     3.1    13.2    +      -       -      +
    260F  TYR*     4.0    13.0    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 87 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     81A  TRP*     3.6    32.5    -      -       +      +
     86A  GLY      4.9     3.4    -      -       -      +
     39F  ILE*     4.1     9.3    -      -       +      +
     86F  GLY*     1.3    70.7    -      -       -      -
     88F  ILE*     1.3    56.6    +      -       +      +
     90F  PHE      3.7     0.2    -      -       -      -
     91F  ALA*     2.7    39.4    +      -       -      +
    260F  TYR*     3.3    40.5    -      -       +      +
    283F  THR*     4.8     1.7    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 88 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     47A  ALA*     4.2     0.9    -      -       +      -
     51A  MSE      5.5     2.7    -      -       -      -
     81A  TRP*     5.2     8.7    -      -       +      -
     88A  ILE*     3.7    42.2    -      -       +      -
     89A  ILE*     4.7     9.0    -      -       +      +
     39F  ILE*     4.2    22.2    -      -       +      -
     43F  VAL      5.4     0.4    -      -       -      +
     44F  GLY*     4.1    22.9    -      -       -      +
     47F  ALA*     3.6    31.0    -      -       +      +
     48F  ALA*     4.1     2.9    -      -       -      +
     51F  MSE      3.7    14.4    -      -       +      +
     86F  GLY      3.4     1.0    -      -       -      -
     87F  ALA*     1.3    75.9    -      -       +      +
     89F  ILE*     1.3    66.6    +      -       -      +
     91F  ALA*     3.3     4.1    +      -       -      +
     92F  GLY      3.1    18.2    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 89 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     43A  VAL      4.7     2.9    -      -       -      +
     88A  ILE*     4.8     7.4    -      -       +      +
     51F  MSE      3.7    27.1    -      -       -      -
     55F  LEU*     4.3     6.3    -      -       +      +
     79F  SER*     4.0    26.0    -      -       -      +
     81F  TRP*     3.9    12.1    -      -       +      +
     82F  ALA*     3.8    21.8    -      -       +      +
     85F  GLY*     3.8     9.0    -      -       -      -
     86F  GLY      3.1    29.8    -      -       -      +
     88F  ILE*     1.3    79.3    -      -       -      +
     90F  PHE*     1.3    73.2    +      -       +      +
     92F  GLY*     3.4     1.7    +      -       -      -
     93F  ILE*     3.1    36.8    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE 90 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    237A  PHE*     3.9     9.9    -      +       -      -
     72F  TRP*     4.2    10.3    -      +       -      -
     76F  TYR*     3.8    24.7    -      +       -      -
     82F  ALA*     3.2    31.0    -      -       +      -
     85F  GLY*     3.5    21.5    -      -       -      -
     86F  GLY      3.1    23.5    +      -       -      +
     87F  ALA      4.4     0.2    -      -       -      +
     89F  ILE*     1.3    82.6    -      -       +      +
     91F  ALA*     1.3    56.3    +      -       -      +
     93F  ILE*     3.9    23.4    -      -       +      +
     94F  SER*     2.5    39.0    +      -       -      -
    260F  TYR*     4.1     6.5    -      -       +      -
    261F  THR*     3.5    31.0    -      -       +      -
    283F  THR      3.2    20.6    -      -       -      +
    285F  GLY*     4.3     4.4    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 91 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     37F  ALA*     3.6    14.0    -      -       +      +
     39F  ILE*     3.5    29.6    -      -       +      -
     48F  ALA*     5.0     2.0    -      -       +      -
     87F  ALA      2.7    24.6    +      -       -      +
     88F  ILE      3.3     4.2    +      -       -      +
     90F  PHE*     1.3    72.9    -      -       -      +
     92F  GLY*     1.3    59.1    +      -       -      +
     94F  SER*     3.4     1.9    +      -       -      -
     95F  ALA*     3.0    28.9    +      -       -      +
    282F  GLY      3.1    20.7    -      -       -      +
    283F  THR*     4.1     2.7    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 92 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     37F  ALA*     4.8     0.4    -      -       -      +
     48F  ALA*     5.0     1.5    -      -       -      +
     51F  MSE      4.3     3.8    -      -       -      -
     52F  ILE*     3.7    22.3    -      -       -      +
     55F  LEU*     3.7    13.9    -      -       -      -
     88F  ILE      3.1    13.9    +      -       -      -
     89F  ILE      3.8     3.4    -      -       -      -
     91F  ALA*     1.3    76.1    -      -       -      +
     93F  ILE*     1.3    62.4    +      -       -      +
     95F  ALA*     3.5     1.9    +      -       -      +
     96F  ILE*     3.3    28.9    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 93 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     55F  LEU*     4.0    14.6    -      -       +      -
     72F  TRP*     3.3    39.7    -      -       +      +
     75F  MSE      4.0    36.5    -      -       +      +
     76F  TYR*     4.5     3.4    -      -       +      +
     82F  ALA*     4.4     7.6    -      -       +      -
     89F  ILE*     3.1    35.4    +      -       +      +
     90F  PHE*     3.9    23.3    -      -       +      +
     92F  GLY*     1.3    76.1    -      -       -      +
     94F  SER*     1.3    57.3    +      -       -      +
     96F  ILE*     3.3     7.1    +      -       -      +
     97F  GLU*     2.8    27.2    +      -       -      +
    285F  GLY      4.1     1.3    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 94 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     90F  PHE      2.5    23.9    +      -       -      -
     91F  ALA      3.5     0.2    -      -       -      -
     93F  ILE*     1.3    78.1    -      -       -      +
     95F  ALA*     1.3    63.4    +      -       -      +
     97F  GLU*     3.3     1.9    +      -       -      +
     98F  GLN*     2.9    30.2    +      -       -      +
    281F  ILE      3.2    20.4    +      -       -      -
    282F  GLY*     3.5    19.1    -      -       -      -
    283F  THR      3.6     0.2    -      -       -      -
    285F  GLY      2.8    36.9    +      -       -      -
    286F  GLY*     3.1     1.3    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 95 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     21F  VAL      5.3     0.2    -      -       -      +
     23F  VAL*     3.5    20.6    -      -       +      +
     35F  GLY*     3.4    12.3    -      -       -      -
     36F  GLU*     3.6    14.3    +      -       -      +
     37F  ALA      3.6    21.1    -      -       -      +
     52F  ILE*     3.8    16.2    -      -       +      -
     91F  ALA      3.0    16.9    +      -       -      +
     92F  GLY      3.9     1.1    -      -       -      +
     93F  ILE      3.4     0.2    -      -       -      -
     94F  SER*     1.3    76.5    -      -       -      +
     96F  ILE*     1.3    62.7    +      -       -      +
     98F  GLN*     3.4     1.0    +      -       -      +
     99F  ALA      3.2    16.1    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 96 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     23F  VAL*     4.5     8.7    -      -       +      -
     25F  ILE*     3.9     7.6    -      -       +      +
     52F  ILE*     4.4    16.2    -      -       +      -
     55F  LEU*     3.8    28.9    -      -       +      -
     56F  SER*     4.2     6.3    -      -       -      +
     60F  LEU*     3.7    39.5    -      -       +      -
     75F  MSE      3.8    27.6    -      -       +      -
     92F  GLY      3.3    15.6    +      -       -      +
     93F  ILE      3.6     6.3    -      -       -      +
     94F  SER      3.2     0.2    -      -       -      -
     95F  ALA*     1.3    78.3    -      -       -      +
     97F  GLU*     1.3    62.2    +      -       -      +
     99F  ALA*     3.2     5.0    +      -       -      +
    100F  LEU*     3.1    28.6    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 97 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     68F  ILE*     4.1    12.1    -      -       +      +
     72F  TRP*     4.0    21.3    -      -       +      -
     75F  MSE      5.2     2.0    -      -       +      +
     93F  ILE      2.8    17.4    +      -       -      +
     94F  SER      3.7     2.9    -      -       -      +
     96F  ILE*     1.3    77.4    -      -       -      +
     98F  GLN*     1.3    66.7    +      -       -      +
    100F  LEU*     3.2    12.4    +      -       +      +
    101F  TRP*     3.0    49.4    +      -       -      +
    285F  GLY      4.1     7.9    -      -       -      +
    286F  GLY*     3.2     5.8    -      -       -      -
    287F  LEU*     2.7    24.5    +      -       -      -
    288F  MSE      2.8    31.2    +      -       -      +
    289F  GLU      3.8     2.4    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 98 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     34F  ALA      3.9     3.1    -      -       -      +
     35F  GLY*     3.5     6.1    -      -       -      -
     36F  GLU*     2.9    44.7    +      -       -      +
     94F  SER      2.9    18.8    +      -       -      +
     95F  ALA      3.6     3.4    -      -       -      +
     96F  ILE      3.3     0.2    -      -       -      -
     97F  GLU*     1.3    81.8    +      -       -      +
     99F  ALA*     1.3    63.4    +      -       -      +
    101F  TRP*     3.2     5.4    +      -       -      +
    102F  ASP*     3.0    21.5    +      -       -      +
    281F  ILE*     3.3    39.2    +      -       +      +
    282F  GLY*     3.6     6.5    -      -       -      +
    287F  LEU*     4.3    24.9    -      -       +      +
    313F  LEU*     5.3     1.0    -      -       -      +
    314F  ILE*     4.4     2.7    -      -       -      +
    317F  ALA*     4.3    10.3    -      -       +      +
    366F  LEU*     4.0    10.6    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 99 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     23F  VAL*     4.5     3.1    -      -       +      -
     25F  ILE*     3.6    21.3    -      -       +      -
     33F  GLY*     3.5    20.5    -      -       -      +
     34F  ALA      3.4    19.9    +      -       -      +
     35F  GLY      3.9     1.6    -      -       -      +
     95F  ALA      3.2     8.3    +      -       -      +
     96F  ILE      3.2     9.7    +      -       -      +
     98F  GLN*     1.3    77.9    -      -       -      +
    100F  LEU*     1.3    63.7    +      -       -      +
    102F  ASP*     3.2     3.9    +      -       -      +
    103F  ILE*     3.0    27.2    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 100 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      5F  ILE*     4.2    10.1    -      -       +      -
     25F  ILE*     4.0    16.6    -      -       +      -
     60F  LEU*     5.3     0.2    -      -       +      -
     65F  PRO*     3.9    33.9    -      -       +      +
     68F  ILE*     3.8    32.8    -      -       +      +
     71F  LEU*     3.8    30.1    -      -       +      -
     72F  TRP      5.7     0.2    -      -       -      +
     75F  MSE      5.2     2.7    -      -       +      -
     96F  ILE*     3.1    32.4    +      -       +      +
     97F  GLU*     3.2    11.2    +      -       +      +
     99F  ALA*     1.3    76.6    -      -       -      +
    101F  TRP*     1.3    57.9    +      -       -      +
    103F  ILE*     3.3     8.2    +      -       +      +
    104F  LYS*     3.0    26.0    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with TRP 101 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    115B  LEU      3.6    25.1    -      -       -      -
    117B  GLY*     3.6    22.0    -      -       -      -
     68F  ILE*     3.4    27.7    -      -       +      +
     69F  GLU*     5.8     1.1    -      -       +      -
     97F  GLU*     3.0    56.8    +      -       +      -
     98F  GLN      3.2     6.0    +      -       -      +
    100F  LEU*     1.3    73.9    -      -       -      +
    102F  ASP*     1.3    60.7    +      -       -      +
    104F  LYS*     3.2    16.0    +      -       +      +
    105F  GLY      2.8    26.2    +      -       -      -
    112F  VAL*     3.5    26.6    -      -       +      +
    115F  LEU*     3.8    21.3    -      -       +      -
    116F  PHE*     3.7    27.1    -      +       -      -
    287F  LEU*     4.2    12.1    -      -       +      -
    288F  MSE      3.7    27.6    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASP 102 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     33F  GLY*     3.4     7.7    -      -       -      -
     34F  ALA*     2.9    26.5    +      -       -      +
     98F  GLN      3.0    12.0    +      -       -      +
     99F  ALA      3.2    11.7    -      -       -      +
    101F  TRP*     1.3    77.2    -      -       -      +
    103F  ILE*     1.3    57.9    +      -       -      +
    105F  GLY      3.4     0.2    +      -       -      -
    106F  LYS*     2.9    53.7    +      -       -      +
    112F  VAL*     4.3     0.6    -      -       -      +
    364F  PRO      4.4     0.5    -      -       -      +
    365F  GLY*     3.5     7.1    -      -       -      -
    366F  LEU*     2.8    46.5    +      -       +      +
    367F  GLY      4.5     0.9    +      -       -      -
    368F  ALA*     5.1     6.4    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 103 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      3F  LEU*     3.8    28.7    -      -       +      -
     25F  ILE*     4.0    21.5    -      -       +      +
     27F  THR*     3.9    21.1    -      -       +      -
     31F  ILE*     4.1    13.2    -      -       +      +
     32F  THR      3.7     3.8    -      -       -      -
     33F  GLY*     3.5    26.7    -      -       -      +
     65F  PRO*     4.3    19.5    -      -       +      -
     99F  ALA      3.0    18.4    +      -       -      +
    100F  LEU*     3.5     9.9    -      -       +      +
    101F  TRP      3.2     0.2    -      -       -      -
    102F  ASP*     1.3    73.9    -      -       -      +
    104F  LYS*     1.3    60.3    +      -       -      +
    106F  LYS*     3.1     2.3    +      -       -      +
    107F  CYS*     2.8    30.6    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 104 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    114B  GLU*     2.9    53.3    +      -       -      +
    115B  LEU*     4.9     0.4    -      -       -      +
    117B  GLY      4.3     4.0    -      -       -      -
    118B  GLY      3.9     0.8    -      -       -      +
     66F  SER*     3.0    33.8    +      -       -      +
     68F  ILE*     3.5    17.7    -      -       -      -
    100F  LEU      3.0    13.1    +      -       -      +
    101F  TRP*     3.6    28.9    -      -       +      +
    103F  ILE*     1.3    77.8    -      -       -      +
    105F  GLY*     1.3    64.3    +      -       -      +
    107F  CYS*     3.3     5.4    +      -       +      +
    108F  LEU*     3.0    39.1    +      -       +      +
    115F  LEU*     3.8    13.7    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 105 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101F  TRP      2.8    12.7    +      -       -      -
    104F  LYS*     1.3    77.8    -      -       -      +
    106F  LYS*     1.3    57.0    +      -       -      +
    108F  LEU*     3.2     2.3    +      -       -      -
    109F  GLY      2.8    25.6    +      -       -      -
    110F  VAL      3.1    27.8    +      -       -      -
    112F  VAL*     4.9     1.1    -      -       -      -
    115F  LEU*     4.1    12.9    -      -       -      +
    365F  GLY*     3.6    12.1    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 106 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     31F  ILE*     3.8    19.6    -      -       +      +
     32F  THR*     2.7    42.2    +      -       -      +
    102F  ASP*     2.9    39.6    +      -       -      +
    103F  ILE      3.6     4.0    -      -       -      +
    105F  GLY*     1.3    75.7    -      -       -      +
    107F  CYS*     1.3    63.8    +      -       -      +
    109F  GLY*     3.2    11.4    +      -       -      -
    364F  PRO*     4.1    27.1    -      -       +      +
    365F  GLY      3.8     0.4    -      -       -      +
    368F  ALA      5.0    10.7    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with CYS 107 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      3F  LEU*     3.3    36.3    -      -       -      -
     31F  ILE*     3.5    19.1    -      -       -      -
    103F  ILE*     2.8    20.8    +      -       -      +
    104F  LYS*     3.5     8.1    -      -       -      +
    105F  GLY      3.3     0.2    -      -       -      -
    106F  LYS*     1.3    77.9    -      -       -      +
    108F  LEU*     1.3    69.4    +      -       +      +
    109F  GLY      3.7     0.2    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 108 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108B  LEU*     4.1    24.0    -      -       +      +
    110B  VAL*     3.7    31.0    -      -       +      -
    114B  GLU*     5.6     3.4    -      -       +      +
    115B  LEU*     3.9    17.5    -      -       +      -
    104F  LYS*     3.0    28.8    +      -       +      +
    105F  GLY      4.1     1.8    -      -       -      +
    107F  CYS*     1.3    85.0    -      -       +      +
    109F  GLY*     1.3    62.1    +      -       -      +
    110F  VAL*     3.4    18.2    +      -       +      +
    115F  LEU*     3.8    24.0    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 109 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    105F  GLY      2.8     8.6    +      -       -      -
    106F  LYS      3.2    10.8    +      -       -      -
    107F  CYS      3.4     0.6    +      -       -      -
    108F  LEU*     1.3    78.7    -      -       -      +
    110F  VAL*     1.3    63.1    +      -       -      +
    111F  PRO*     4.8     0.5    -      -       -      +
    364F  PRO*     3.8    15.1    -      -       -      +
----------------------------------------------------------
 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