Contacts of the helix formed by residues 132 - 155 (chain K) in PDB entry 1VEQ


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 LEU 132 (chain K).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121J  ARG*     4.8     2.5    -      -       -      +
    124J  ILE*     4.6    19.7    -      -       +      -
    125J  GLU*     4.8    20.0    -      -       -      +
    128J  GLU*     4.8    16.4    -      -       +      +
    135J  GLN*     5.0     7.6    -      -       -      +
    139J  ILE*     4.4    22.5    -      -       +      +
    127K  LEU      4.5     1.3    +      -       -      -
    128K  GLU*     4.5    28.9    -      -       +      +
    130K  LEU      4.3     0.6    +      -       -      -
    131K  ASP*     1.3    72.0    +      -       -      +
    133K  VAL*     1.3    65.9    +      -       +      +
    135K  GLN*     3.0    40.8    +      -       -      +
    136K  ASP*     3.0    10.0    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 133 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121J  ARG*     3.9     7.6    -      -       -      +
    124J  ILE*     5.2     5.8    -      -       +      -
    139J  ILE*     4.1    17.3    -      -       +      -
    142J  ALA*     3.9    15.9    -      -       +      -
    143J  GLY*     3.8    21.3    -      -       -      +
    146J  GLU*     3.8    18.8    -      -       -      +
     71K  ARG*     3.5    31.6    -      -       -      +
    131K  ASP*     3.2     9.4    +      -       -      +
    132K  LEU*     1.3    73.5    -      -       +      +
    134K  SER*     1.3    54.2    +      -       -      +
    135K  GLN      2.6    15.9    +      -       -      -
    136K  ASP*     3.1    12.6    +      -       -      +
    137K  LEU*     3.1    14.9    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 134 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     17K  VAL*     3.9    25.8    -      -       -      +
     21K  LEU*     4.8     7.0    -      -       -      -
     71K  ARG*     3.0    25.6    +      -       -      +
     75K  LEU*     4.9     1.7    -      -       -      +
    127K  LEU*     3.2    19.6    -      -       -      +
    131K  ASP*     2.6    32.9    +      -       -      -
    132K  LEU      3.4     0.4    -      -       -      -
    133K  VAL*     1.3    74.3    -      -       -      +
    135K  GLN*     1.3    57.7    +      -       -      +
    137K  LEU*     4.1    11.9    -      -       -      +
    138K  LEU*     3.7    15.2    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 135 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    124K  ILE*     3.5    37.9    +      -       +      +
    127K  LEU*     4.2     8.7    -      -       +      -
    128K  GLU*     3.3    43.6    -      -       -      +
    131K  ASP      3.4     6.9    +      -       -      +
    132K  LEU*     3.0    34.0    -      -       -      +
    133K  VAL      2.6     6.9    +      -       -      -
    134K  SER*     1.3    76.0    -      -       -      +
    136K  ASP*     1.3    63.0    +      -       -      -
    137K  LEU      2.6     5.6    +      -       -      -
    138K  LEU*     2.7    13.7    +      -       -      +
    139K  ILE*     2.8    23.6    +      -       +      +
    132L  LEU*     4.8     8.9    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASP 136 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    136J  ASP*     2.5    18.4    -      -       -      +
    139J  ILE*     4.0    26.0    -      -       +      +
    140J  ALA*     5.3     8.0    -      -       -      +
    132K  LEU      3.0     5.5    +      -       -      +
    133K  VAL      3.1     5.4    +      -       -      +
    135K  GLN*     1.3    77.4    +      -       -      +
    137K  LEU*     1.3    64.8    +      -       -      +
    139K  ILE*     3.6    10.9    -      -       -      +
    140K  ALA*     3.1    23.9    +      -       -      +
    136L  ASP*     2.4    36.7    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 137 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     21K  LEU*     6.1     0.4    -      -       +      -
     67K  GLU*     4.6    27.8    -      -       +      +
     68K  VAL*     4.5     8.7    -      -       +      -
     71K  ARG*     4.7    22.7    -      -       +      -
    133K  VAL*     3.1    18.8    +      -       +      +
    134K  SER*     4.1     8.5    -      -       -      -
    135K  GLN      2.6     0.8    +      -       -      -
    136K  ASP*     1.3    82.4    -      -       -      +
    138K  LEU*     1.3    77.7    +      -       +      +
    140K  ALA*     3.3     6.9    +      -       -      +
    141K  HIS*     3.1    51.0    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 138 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     21K  LEU*     4.1    24.2    -      -       +      -
     24K  GLN*     3.1    41.7    -      -       +      +
     28K  TYR*     3.9     9.6    -      -       -      +
     68K  VAL*     4.9     3.4    -      -       +      -
    120K  THR*     3.6    18.9    -      -       +      +
    123K  SER*     5.1     6.3    -      -       -      -
    124K  ILE*     4.1    16.7    -      -       +      +
    127K  LEU*     4.6    10.8    -      -       +      -
    134K  SER      3.7    10.7    +      -       -      +
    135K  GLN*     2.7    11.2    +      -       -      +
    137K  LEU*     1.3    95.0    -      -       +      +
    139K  ILE*     1.3    63.7    +      -       -      +
    141K  HIS*     3.4     8.2    +      -       +      +
    142K  ALA*     3.3    15.4    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 139 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    124K  ILE*     3.9    28.7    -      -       +      -
    135K  GLN*     2.8    36.4    +      -       +      +
    136K  ASP*     3.6    14.1    -      -       -      +
    138K  LEU*     1.3    71.3    -      -       -      +
    140K  ALA*     1.3    71.2    +      -       -      +
    142K  ALA*     2.6    23.8    +      -       -      +
    143K  GLY      3.2     2.9    +      -       -      -
    132L  LEU*     4.3    27.8    -      -       +      +
    133L  VAL*     4.0    22.2    -      -       +      +
    136L  ASP*     4.0    27.4    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 140 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     64K  TYR*     4.5     5.0    +      -       +      -
    136K  ASP*     3.1    12.4    +      -       -      +
    137K  LEU*     3.5    11.2    -      -       -      +
    139K  ILE*     1.3    82.5    -      -       -      +
    141K  HIS*     1.3    67.6    +      -       +      +
    143K  GLY*     3.0    14.5    +      -       -      -
    144K  GLU*     3.6     5.9    +      -       -      +
    136L  ASP*     5.3     6.9    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with HIS 141 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     28K  TYR*     2.6    33.0    +      +       -      +
     64K  TYR*     3.2    46.0    -      +       +      -
     67K  GLU*     3.0    21.4    +      -       -      -
     68K  VAL*     3.9     7.0    -      -       +      -
    120K  THR*     5.8     1.1    -      -       +      -
    137K  LEU*     3.1    39.4    -      -       +      +
    138K  LEU*     3.5     9.3    -      -       +      +
    139K  ILE      2.9     1.8    +      -       -      -
    140K  ALA*     1.3    76.2    -      -       +      +
    142K  ALA*     1.3    65.7    +      -       -      +
    144K  GLU*     2.9     5.2    +      -       -      +
    145K  LEU*     2.7    40.3    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 142 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    117K  ILE*     5.6     3.1    -      -       +      -
    120K  THR*     4.5    10.9    -      -       +      +
    121K  ARG*     5.4     1.8    -      -       +      +
    124K  ILE*     4.4     9.0    -      -       +      -
    138K  LEU      3.3     7.4    +      -       -      +
    139K  ILE*     2.6    19.4    +      -       -      +
    141K  HIS*     1.3    73.3    -      -       -      +
    143K  GLY*     1.3    55.1    +      -       -      +
    145K  LEU*     3.0     7.6    +      -       -      -
    146K  GLU*     2.6    56.5    +      -       -      +
    133L  VAL*     3.8    14.6    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 143 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    139K  ILE      3.2     3.0    +      -       -      -
    140K  ALA*     3.0    11.0    +      -       -      -
    142K  ALA*     1.3    78.6    -      -       -      +
    144K  GLU*     1.3    59.4    +      -       -      +
    146K  GLU*     4.1     1.4    -      -       -      +
    147K  LYS*     3.1    26.3    +      -       -      +
     71L  ARG*     4.3     8.0    +      -       -      -
    133L  VAL*     3.9    20.9    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 144 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     57K  GLN*     4.2     4.7    -      -       -      +
     60K  LEU*     3.5    27.1    -      -       +      +
     64K  TYR*     3.4    24.3    +      -       +      +
    140K  ALA      3.6     5.7    +      -       -      +
    141K  HIS      2.9     2.8    +      -       -      +
    143K  GLY*     1.3    75.5    -      -       -      +
    145K  LEU*     1.3    62.5    +      -       -      +
    147K  LYS*     3.6    22.6    +      -       +      +
    148K  PHE*     2.8    32.9    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 145 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     28K  TYR*     4.6    10.1    -      -       +      +
     31K  LEU*     4.0    18.2    -      -       +      -
     57K  GLN*     3.5    13.0    -      -       -      +
     61K  VAL*     4.6     3.8    -      -       +      -
     64K  TYR*     4.0    16.2    -      -       +      -
    113K  TYR*     3.5    34.0    -      -       +      -
    116K  VAL*     4.7    13.7    -      -       +      -
    117K  ILE*     4.5    13.0    -      -       +      -
    120K  THR*     5.7     4.5    -      -       +      +
    141K  HIS*     2.7    52.3    +      -       +      +
    142K  ALA*     3.6     7.4    -      -       -      +
    144K  GLU*     1.3    73.0    -      -       -      +
    146K  GLU*     1.3    64.1    +      -       -      +
    148K  PHE*     3.3     2.6    +      -       -      +
    149K  GLN      3.0    18.2    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 146 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    117K  ILE*     3.5    33.0    -      -       +      +
    121K  ARG*     2.9    35.5    +      -       -      -
    142K  ALA*     2.6    35.5    +      -       -      +
    145K  LEU*     1.3    73.5    -      -       -      +
    147K  LYS*     1.3    62.4    +      -       -      +
    149K  GLN*     3.2     7.9    +      -       -      +
    150K  TRP      3.2    15.9    +      -       -      -
      6L  ILE*     3.4    16.9    -      -       +      +
     71L  ARG*     2.8    39.0    +      -       -      +
     74L  THR*     3.4    15.3    -      -       +      +
    133L  VAL*     3.9     1.3    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 147 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    143K  GLY      3.1    19.5    +      -       -      +
    144K  GLU*     3.6    24.7    +      -       +      +
    145K  LEU      3.3     0.2    -      -       -      -
    146K  GLU*     1.3    74.0    -      -       -      +
    148K  PHE*     1.3    68.8    +      -       -      +
    150K  TRP*     2.8    29.7    +      -       +      +
    151K  PHE*     3.2    25.6    +      -       +      -
     66L  ASP      5.1     0.8    +      -       -      -
     67L  GLU*     5.1    10.9    +      -       -      +
     70L  GLU*     2.8    46.2    +      -       -      +
     71L  ARG*     5.1     1.5    -      -       -      +
     74L  THR*     4.1    18.4    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE 148 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     35K  LEU*     4.2    11.0    -      -       +      -
     53K  MET*     4.1    32.8    -      -       +      -
     54K  ILE*     4.7     5.4    -      -       +      -
     57K  GLN*     3.0    51.1    -      -       +      +
    109K  LEU*     4.2     7.9    -      -       +      -
    113K  TYR*     3.4    38.1    -      +       -      -
    144K  GLU*     2.8    15.8    +      -       +      +
    145K  LEU      3.6     1.6    -      -       -      +
    147K  LYS*     1.3    73.7    -      -       -      +
    149K  GLN*     1.3    66.3    +      -       -      +
    151K  PHE*     2.7    40.2    +      +       +      +
    152K  VAL*     3.1    29.0    +      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 149 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    110K  ASP*     3.4    15.5    +      -       -      +
    113K  TYR*     3.4    24.3    -      -       +      +
    114K  ASN*     2.9    32.3    +      -       -      +
    117K  ILE*     3.4    18.4    -      -       +      +
    145K  LEU      3.0    13.3    +      -       -      +
    146K  GLU*     3.2    11.6    -      -       -      +
    147K  LYS      3.1     0.2    +      -       -      -
    148K  PHE*     1.3    77.6    -      -       -      +
    150K  TRP*     1.3    66.6    +      -       -      +
    152K  VAL*     2.8    23.6    +      -       +      +
    153K  ARG*     2.8    47.5    +      -       +      +
      6L  ILE*     5.0     3.6    -      -       -      +
      7L  PRO*     4.0     5.7    -      -       -      +
     74L  THR*     5.7     1.4    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with TRP 150 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     39F  HIS      4.9     0.7    -      -       -      -
     40F  TRP*     3.7    19.7    -      -       -      -
     42F  VAL      5.2     1.8    -      -       -      -
     43F  VAL*     5.8     2.6    -      -       +      +
     47F  PHE*     4.2    17.3    -      +       -      -
     51F  HIS*     4.3    10.8    -      +       -      -
     99F  ARG*     4.9     5.1    -      -       -      +
    146K  GLU      3.2     2.4    +      -       -      -
    147K  LYS*     2.8    23.6    +      -       +      +
    149K  GLN*     1.3    78.1    +      -       -      +
    151K  PHE*     1.3    84.5    +      +       -      -
    153K  ARG*     3.0    10.7    +      -       -      +
    154K  ALA*     2.6    46.0    +      -       +      +
    157K  GLU*     5.5     1.0    +      -       -      -
      4L  PHE*     4.4    13.2    -      +       -      -
     70L  GLU*     4.3    33.2    -      -       +      -
     73L  ALA*     3.5    45.4    +      -       +      +
     74L  THR*     3.8    27.3    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE 151 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     47F  PHE*     3.4    20.0    -      +       -      -
     48F  ILE*     4.1    11.4    -      -       +      -
     51F  HIS*     3.7    33.9    -      +       -      -
     52F  GLU*     6.2     0.2    -      -       -      -
     53K  MET*     4.0    21.3    -      -       +      -
    147K  LYS*     3.2    31.1    +      -       +      -
    148K  PHE*     2.7    40.0    +      +       +      +
    150K  TRP*     1.3    89.7    -      +       -      +
    152K  VAL*     1.3    64.2    +      -       -      +
    154K  ALA*     3.3     5.7    +      -       -      +
    155K  HIS*     2.9    23.6    +      -       -      -
     70L  GLU*     5.0     0.9    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 152 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     53K  MET*     4.7     2.2    -      -       +      +
    106K  LEU*     3.0    57.0    -      -       +      +
    109K  LEU*     4.3     7.9    -      -       +      -
    110K  ASP*     4.1    14.1    -      -       +      +
    113K  TYR*     5.5     2.0    -      -       +      -
    148K  PHE*     3.3    44.4    -      -       +      +
    149K  GLN*     2.8    15.9    +      -       +      +
    151K  PHE*     1.3    76.4    -      -       +      +
    153K  ARG*     1.3    62.8    +      -       +      +
    155K  HIS*     3.0    20.0    +      -       -      +
    156K  LEU*     3.9     5.6    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 153 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    110K  ASP*     2.7    33.1    +      -       +      +
    114K  ASN*     3.1    32.1    +      -       -      +
    149K  GLN*     2.8    43.4    +      -       +      +
    150K  TRP*     3.4     9.2    -      -       -      +
    152K  VAL*     1.3    69.0    -      -       -      +
    154K  ALA*     1.3    54.4    +      -       -      +
    155K  HIS      2.8     4.9    -      -       -      -
    156K  LEU*     2.7    37.8    +      -       +      +
    157K  GLU*     3.5    10.3    +      -       -      +
      4L  PHE*     3.4    57.2    -      -       +      +
      5L  THR      3.6    23.6    +      -       -      -
      6L  ILE*     4.4     1.2    -      -       -      +
      7L  PRO*     4.2     1.6    -      -       -      +
     74L  THR      4.9     2.4    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 154 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     42F  VAL      4.5     0.2    -      -       -      +
     43F  VAL*     3.6    22.4    -      -       +      +
     44F  GLY      2.9    26.0    +      -       -      +
     47F  PHE*     3.7    37.4    -      -       +      +
    150K  TRP*     2.6    31.6    +      -       +      +
    151K  PHE      3.3     0.4    +      -       -      +
    153K  ARG*     1.3    72.3    -      -       -      +
    155K  HIS*     1.3    57.9    +      -       -      +
    156K  LEU      3.2     1.2    +      -       -      -
    157K  GLU*     4.0     8.5    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with HIS 155 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     44F  GLY      2.9    20.1    -      -       -      +
     45F  PRO*     3.0    33.7    +      -       -      +
     46F  ASN*     4.7     0.8    -      -       -      -
     47F  PHE*     3.2    28.7    +      +       +      -
     48F  ILE*     3.5    33.2    +      -       +      +
     46K  ASN*     4.4     1.3    +      -       -      -
     49K  GLY*     5.6     0.4    -      -       -      -
     50K  VAL*     4.0    16.1    +      -       +      +
     53K  MET*     3.9     8.7    -      -       -      -
    103K  GLN*     4.0     9.9    +      -       -      +
    106K  LEU*     3.5    27.8    -      -       +      +
    151K  PHE      2.9    20.7    +      -       -      -
    152K  VAL*     3.0    12.6    +      -       -      +
    153K  ARG      2.7     1.0    +      -       -      -
    154K  ALA*     1.3    76.9    -      -       -      +
    156K  LEU*     1.3    62.9    +      -       -      +
    157K  GLU      3.7     0.4    -      -       -      -
----------------------------------------------------------
 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