Contacts of the helix formed by residues 150 - 176 (chain L) in PDB entry 2FJC


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 ASP 150 (chain L).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     32L  ILE*     5.9     2.9    -      -       -      +
     35L  ILE*     3.9    13.1    -      -       +      +
     89L  ARG*     2.9    27.3    +      -       -      -
     93L  LEU*     4.0    14.4    -      -       -      +
    145L  ALA*     2.8    19.4    +      -       +      +
    146L  ALA*     5.8     0.2    -      -       -      -
    148L  SER*     3.3    13.3    +      -       -      +
    149L  GLY*     1.3    72.8    -      -       -      +
    151L  ALA*     1.3    61.6    +      -       -      +
    152L  VAL      3.7     1.0    +      -       -      -
    153L  THR*     2.8    29.2    +      -       -      -
    154L  ASP*     3.0    19.7    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 151 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    142C  GLN*     3.6    39.0    -      -       +      +
    154C  ASP*     5.1     0.2    -      -       -      +
    158C  THR*     3.5    25.1    -      -       +      +
    161C  LEU*     4.9     6.1    -      -       +      -
    149L  GLY      2.8     9.9    +      -       -      +
    150L  ASP*     1.3    70.3    -      -       -      +
    152L  VAL*     1.3    58.0    +      -       -      +
    154L  ASP*     3.2     9.3    -      -       -      +
    155L  GLY      2.9    25.1    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 152 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    158C  THR*     4.2     7.0    -      -       -      +
    161C  LEU*     3.7    45.3    -      -       +      +
    162C  ARG*     3.8    21.6    +      -       +      +
    165C  GLY*     6.0     0.7    -      -       -      -
     89L  ARG*     3.5    37.2    -      -       -      +
     92L  GLN*     4.6     2.5    -      -       -      +
    150L  ASP*     3.3     1.0    +      -       -      -
    151L  ALA*     1.3    77.6    -      -       +      +
    153L  THR*     1.3    64.2    +      -       -      +
    155L  GLY*     3.2     2.9    +      -       -      -
    156L  ILE*     2.9    35.5    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with THR 153 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     35L  ILE*     4.0    20.9    -      -       +      -
     39L  LEU*     4.3     8.5    -      -       +      -
     89L  ARG*     2.8    27.1    +      -       +      +
     93L  LEU*     4.0     3.1    -      -       -      +
    141L  THR*     4.4     2.7    -      -       +      -
    145L  ALA*     4.0    10.3    -      -       +      -
    150L  ASP*     2.8    32.7    +      -       -      -
    152L  VAL*     1.3    76.7    -      -       -      +
    154L  ASP*     1.3    63.3    -      -       -      +
    156L  ILE*     3.2     5.5    +      -       -      +
    157L  ILE*     2.9    43.7    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASP 154 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    151E  ALA*     5.1     0.2    -      -       -      +
    142L  GLN*     2.8    31.5    -      -       -      +
    145L  ALA*     3.7    11.4    -      -       +      +
    146L  ALA*     3.5    20.8    -      -       -      +
    150L  ASP      3.0    14.2    +      -       -      +
    151L  ALA*     3.2    14.4    -      -       -      +
    153L  THR*     1.3    77.8    -      -       -      +
    155L  GLY*     1.3    58.6    +      -       -      +
    157L  ILE*     3.4     3.5    +      -       -      +
    158L  THR*     2.8    41.2    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 155 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    158C  THR*     5.0     6.7    -      -       -      -
    162C  ARG*     3.3    15.3    -      -       -      -
    151L  ALA      2.9    13.8    +      -       -      -
    152L  VAL      3.2     3.1    +      -       -      -
    154L  ASP*     1.3    78.5    -      -       -      +
    156L  ILE*     1.3    60.7    +      -       -      +
    158L  THR*     3.8     5.2    -      -       -      -
    159L  ASP*     3.0    31.1    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 156 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    162C  ARG*     3.6    32.3    -      -       +      +
     85L  THR*     3.9    29.6    -      -       -      +
     86L  ILE*     4.4     7.6    -      -       +      -
     89L  ARG*     3.9    27.8    -      -       +      -
     92L  GLN*     5.5     2.0    -      -       -      +
    152L  VAL*     2.9    36.6    +      -       +      +
    153L  THR*     3.7     4.7    -      -       -      +
    155L  GLY*     1.3    78.4    -      -       -      +
    157L  ILE*     1.3    70.4    +      -       +      +
    159L  ASP*     3.3     4.1    +      -       -      +
    160L  ILE*     3.3    28.2    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 157 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     39L  LEU*     4.2    15.7    -      -       +      -
     86L  ILE*     4.8     7.6    -      -       +      -
     89L  ARG*     6.1     1.1    -      -       +      -
    138L  PHE*     3.3    46.7    -      -       +      +
    141L  THR*     4.1    13.7    -      -       +      -
    142L  GLN*     3.8    11.9    -      -       +      -
    153L  THR*     2.9    41.1    +      -       +      +
    154L  ASP      4.0     1.8    -      -       -      +
    156L  ILE*     1.3    84.5    -      -       +      +
    158L  THR*     1.3    62.2    +      -       -      +
    160L  ILE*     3.1     8.9    +      -       -      +
    161L  LEU*     2.7    40.4    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with THR 158 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    151E  ALA*     3.6    41.8    -      -       +      +
    152E  VAL*     4.2     6.0    -      -       +      +
    155E  GLY*     5.0     9.2    -      -       -      -
    142L  GLN*     3.9     3.1    -      -       -      +
    154L  ASP*     2.8    38.3    +      -       -      -
    155L  GLY*     3.8     6.3    -      -       -      -
    157L  ILE*     1.3    76.6    -      -       -      +
    159L  ASP*     1.3    60.2    +      -       -      +
    161L  LEU*     3.2    10.4    +      -       -      +
    162L  ARG*     2.9    32.7    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASP 159 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    162C  ARG*     3.1    32.4    +      -       -      +
    155L  GLY*     3.0    18.1    +      -       -      +
    156L  ILE*     3.5     5.8    -      -       -      +
    157L  ILE      3.2     0.2    -      -       -      -
    158L  THR*     1.3    78.7    -      -       -      +
    160L  ILE*     1.3    64.2    +      -       +      +
    162L  ARG*     3.2    29.8    +      -       -      +
    163L  THR*     3.3    18.6    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 160 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     82L  ALA*     3.7    28.3    -      -       +      -
     85L  THR*     4.3     3.6    -      -       -      +
     86L  ILE*     3.6    36.6    -      -       +      -
    138L  PHE*     3.8    30.1    -      -       +      -
    156L  ILE*     3.4    21.1    -      -       +      +
    157L  ILE*     3.1     8.7    +      -       -      +
    159L  ASP*     1.3    74.9    -      -       +      +
    161L  LEU*     1.3    65.9    +      -       -      +
    163L  THR*     3.1    13.4    +      -       -      +
    164L  LEU*     2.9    28.1    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 161 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    151E  ALA*     5.0     4.5    -      -       +      -
    152E  VAL*     3.8    19.7    -      -       +      +
    135L  SER*     3.7    31.6    +      -       -      +
    138L  PHE*     3.3    27.1    -      -       +      -
    139L  SER*     3.9    23.3    -      -       -      +
    142L  GLN*     4.1    13.7    -      -       +      -
    157L  ILE*     2.7    35.0    +      -       +      +
    158L  THR*     3.3    12.1    -      -       -      +
    160L  ILE*     1.3    72.8    -      -       -      +
    162L  ARG*     1.3    58.0    +      -       -      +
    164L  LEU*     3.4     6.3    +      -       +      +
    165L  GLY*     2.9    26.3    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 162 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     92E  GLN*     5.1     3.5    +      -       -      +
    152E  VAL*     3.9    25.7    +      -       +      +
    155E  GLY*     3.3    26.3    +      -       -      -
    156E  ILE*     3.9    29.6    -      -       +      +
    159E  ASP*     3.1    30.3    +      -       -      +
    158L  THR*     2.9    17.4    +      -       -      +
    159L  ASP*     3.4    24.1    +      -       -      +
    160L  ILE      3.1     0.6    -      -       -      -
    161L  LEU*     1.3    77.5    -      -       -      +
    163L  THR*     1.3    65.6    +      -       +      +
    165L  GLY*     3.3     1.9    +      -       -      -
    166L  LYS*     3.2    21.8    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with THR 163 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     78L  SER*     4.4    14.1    +      -       -      +
    159L  ASP      3.3    13.4    +      -       -      +
    160L  ILE*     3.1    14.4    +      -       -      +
    162L  ARG*     1.3    78.9    -      -       +      +
    164L  LEU*     1.3    66.8    +      -       -      +
    166L  LYS*     3.4     7.1    +      -       -      +
    167L  ALA*     3.1    23.7    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 164 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    131L  PHE*     3.8    44.4    -      -       +      +
    134L  LEU*     4.0     7.6    -      -       +      -
    135L  SER*     3.8    24.5    -      -       -      +
    138L  PHE*     3.5    36.1    -      -       +      -
    160L  ILE*     2.9    22.4    +      -       +      +
    161L  LEU*     3.7     8.5    -      -       +      +
    163L  THR*     1.3    81.7    +      -       -      +
    165L  GLY*     1.3    57.9    +      -       -      +
    167L  ALA*     3.2     3.5    +      -       -      +
    168L  ILE*     2.8    42.5    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 165 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     89E  ARG*     5.2     4.0    -      -       -      -
     92E  GLN*     4.0    19.0    -      -       -      +
    152E  VAL*     6.1     0.2    -      -       -      -
    135L  SER*     5.6     1.5    +      -       -      -
    161L  LEU      2.9    16.3    +      -       -      -
    162L  ARG*     3.3     2.4    +      -       -      -
    163L  THR      3.3     0.2    -      -       -      -
    164L  LEU*     1.3    77.8    -      -       -      +
    166L  LYS*     1.3    60.7    +      -       -      +
    168L  ILE*     3.8     8.9    -      -       -      +
    169L  TRP*     3.0    25.1    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 166 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     88E  GLU*     3.0    29.8    +      -       +      +
     92E  GLN*     3.8    17.8    +      -       -      +
     69H  HIS*     4.6     6.7    +      -       -      -
    162L  ARG*     3.2    12.8    +      -       +      +
    163L  THR*     3.7    10.5    -      -       -      +
    165L  GLY*     1.3    76.8    -      -       -      +
    167L  ALA*     1.3    56.9    +      -       -      +
    169L  TRP*     3.3    21.2    +      -       +      +
    170L  MET*     2.9    68.6    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 167 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     75L  TYR*     4.1    19.1    -      -       +      +
    131L  PHE*     3.8    26.7    -      -       +      -
    163L  THR      3.1    16.4    +      -       -      +
    164L  LEU*     3.6     5.6    -      -       +      +
    166L  LYS*     1.3    75.6    -      -       -      +
    168L  ILE*     1.3    59.5    +      -       -      +
    170L  MET*     3.7     7.3    -      -       -      +
    171L  LEU*     2.8    36.9    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 168 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128L  LYS*     3.7    14.5    -      -       -      +
    131L  PHE*     3.6    45.1    -      -       +      +
    132L  GLU*     3.8    31.6    -      -       +      +
    135L  SER*     4.0    14.6    -      -       -      +
    164L  LEU*     2.8    28.8    +      -       +      +
    165L  GLY*     3.8     7.4    -      -       -      +
    167L  ALA*     1.3    71.5    -      -       -      +
    169L  TRP*     1.3    59.3    +      -       -      +
    171L  LEU*     3.4     7.2    +      -       -      +
    172L  GLY*     2.9    24.4    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with TRP 169 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     88E  GLU*     4.1    17.0    -      -       +      -
     91E  LEU*     3.5    49.4    -      -       +      +
     92E  GLN*     3.7    22.9    -      -       +      -
     58H  TRP      4.0     8.7    +      -       -      -
     65H  PHE*     3.6    19.5    -      +       -      -
     69H  HIS*     3.5    29.6    -      +       -      -
    165L  GLY      3.0    18.3    +      -       -      +
    166L  LYS*     3.6    26.5    -      -       +      +
    168L  ILE*     1.3    78.9    -      -       -      +
    170L  MET*     1.3    88.0    +      -       +      +
    172L  GLY*     3.2     2.3    +      -       -      -
    173L  ALA*     2.9    25.4    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with MET 170 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65H  PHE*     3.7    23.5    -      -       +      -
     66H  LYS*     5.0    22.0    -      -       +      -
     69H  HIS*     4.6     9.6    -      -       -      -
     70H  GLU*     6.1     0.2    -      -       -      +
     75L  TYR*     5.2     4.3    -      -       -      +
    166L  LYS*     2.9    59.5    +      -       +      +
    167L  ALA*     3.2     7.2    +      -       -      +
    169L  TRP*     1.3    97.0    -      -       +      +
    171L  LEU*     1.3    57.3    +      -       -      +
    173L  ALA*     3.1     3.3    +      -       -      +
    174L  THR*     2.6    37.4    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 171 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     71L  LEU*     4.5     5.2    -      -       +      -
     75L  TYR*     3.5    19.7    -      -       +      +
    124L  LEU*     3.9    38.6    -      -       +      -
    127L  VAL*     3.3    28.9    -      -       +      -
    128L  LYS*     3.6    28.7    -      -       +      +
    131L  PHE*     3.8    19.5    -      -       +      -
    167L  ALA      2.8    20.9    +      -       -      +
    168L  ILE*     3.7     3.8    -      -       -      +
    170L  MET*     1.3    72.1    -      -       -      +
    172L  GLY*     1.3    57.7    -      -       -      +
    174L  THR*     3.2     6.9    +      -       +      +
    175L  LEU*     2.9    36.4    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 172 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128L  LYS*     3.5    23.5    -      -       -      +
    168L  ILE      2.9    12.0    +      -       -      -
    169L  TRP*     3.6     3.4    -      -       -      -
    170L  MET      3.2     0.2    -      -       -      -
    171L  LEU*     1.3    77.8    -      -       -      +
    173L  ALA*     1.3    56.9    +      -       -      +
    175L  LEU*     3.8     2.7    -      -       -      +
    176L  LYS*     3.0    30.1    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 173 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     60H  ILE      4.5     4.9    -      -       -      +
     61H  TYR*     3.5     8.6    -      -       +      +
     62H  GLY      2.8    25.2    +      -       -      -
     65H  PHE*     3.6    35.4    -      -       +      -
    169L  TRP*     2.9    21.0    +      -       +      +
    170L  MET      3.1     7.8    +      -       -      +
    172L  GLY*     1.3    78.5    -      -       -      +
    174L  THR*     1.3    59.4    +      -       -      +
    176L  LYS*     3.7     8.2    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with THR 174 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     62H  GLY*     2.9    14.9    -      -       -      -
     63H  ILE*     3.2    40.5    +      -       -      +
     65H  PHE*     3.6    18.8    -      -       +      -
     66H  LYS*     4.5     8.5    -      -       +      +
     71L  LEU*     6.2     3.1    -      -       +      -
    124L  LEU*     3.8    24.2    -      -       +      +
    170L  MET*     2.6    32.0    +      -       +      +
    171L  LEU*     3.7     9.9    +      -       +      +
    173L  ALA*     1.3    75.4    -      -       -      +
    175L  LEU*     1.3    61.2    +      -       -      +
    176L  LYS      4.4     0.3    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 175 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63H  ILE*     5.9     0.4    -      -       +      -
    121L  VAL*     3.7    41.7    -      -       +      +
    124L  LEU*     3.8    17.5    -      -       +      +
    125L  ALA*     3.4    35.0    -      -       +      +
    128L  LYS*     4.2    15.0    -      -       +      -
    171L  LEU      2.9    20.1    +      -       -      +
    172L  GLY*     4.1     3.6    -      -       -      +
    174L  THR*     1.3    83.1    -      -       -      +
    176L  LYS*     1.3    65.1    +      -       -      +
    177L  ALA*     3.4     5.7    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 176 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     59H  HIS      5.5     0.4    +      -       -      -
     61H  TYR*     3.6    45.8    -      -       +      +
     62H  GLY*     4.1    12.0    -      -       -      -
     63H  ILE      5.1     0.2    +      -       -      -
    117H  GLU*     2.9    44.5    +      -       -      +
    172L  GLY      3.0    18.0    +      -       -      +
    173L  ALA*     3.7    10.8    -      -       -      +
    174L  THR      3.4     1.1    -      -       -      +
    175L  LEU*     1.3    77.4    -      -       -      +
    177L  ALA*     1.3    67.8    +      -       -      +
----------------------------------------------------------
 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