Contacts of the helix formed by residues 283 - 314 (chain E) in PDB entry 4LML


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 GLN 283 (chain E).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    278E  LEU*     3.1    33.7    +      -       +      +
    281E  GLU*     4.4     8.9    -      -       +      +
    282E  SER*     1.3    79.5    -      -       -      +
    284E  PRO*     1.4    64.2    -      -       -      +
    285E  ALA*     3.1    10.2    +      -       +      +
    286E  ARG*     3.3    52.1    +      -       +      +
    287E  ALA*     3.3     9.9    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with PRO 284 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    279E  LYS*     4.4    23.6    -      -       +      +
    282E  SER*     3.3    11.9    -      -       -      +
    283E  GLN*     1.4    87.0    -      -       -      +
    285E  ALA*     1.3    65.7    +      -       +      +
    286E  ARG      3.2     0.2    -      -       -      -
    287E  ALA*     3.5    11.7    -      -       +      -
    288E  ALA*     2.9    28.7    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 285 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    283E  GLN*     3.1     8.7    -      -       +      -
    284E  PRO*     1.3    80.4    -      -       +      +
    286E  ARG*     1.3    60.4    +      -       -      +
    288E  ALA*     4.6     2.6    -      -       -      +
    289E  SER*     3.6    16.5    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 286 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    278E  LEU*     3.5    19.8    -      -       +      +
    283E  GLN*     3.3    34.4    +      -       -      +
    284E  PRO      3.2     0.2    -      -       -      -
    285E  ALA*     1.3    77.6    -      -       -      +
    287E  ALA*     1.3    60.6    +      -       -      +
    289E  SER*     3.0    10.8    +      -       -      -
    290E  ILE*     2.9    41.0    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 287 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    275E  GLN*     4.2    30.5    -      -       +      +
    278E  LEU*     3.4    17.0    -      -       +      +
    279E  LYS*     4.6     7.9    -      -       +      +
    283E  GLN      3.3     5.6    +      -       -      +
    284E  PRO*     3.1    21.2    +      -       +      +
    286E  ARG*     1.3    79.7    -      -       -      +
    288E  ALA*     1.3    60.8    +      -       -      +
    290E  ILE*     3.6     5.1    +      -       -      +
    291E  THR*     3.1    27.9    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 288 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    284E  PRO*     2.9    15.9    +      -       +      +
    285E  ALA*     4.6     2.5    -      -       -      +
    287E  ALA*     1.3    75.6    -      -       -      +
    289E  SER*     1.3    58.5    +      -       -      +
    291E  THR*     4.0     4.8    -      -       -      -
    292E  ARG*     2.9    34.0    +      -       -      +
    295E  ARG*     5.9     0.3    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 289 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    285E  ALA      3.6    13.3    +      -       -      -
    286E  ARG*     3.0    18.6    +      -       -      -
    288E  ALA*     1.3    76.0    -      -       -      +
    290E  ILE*     1.3    65.6    +      -       -      +
    292E  ARG*     3.4     4.5    +      -       -      +
    293E  ALA*     2.9    25.3    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 290 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    271E  GLU*     4.3    17.3    -      -       +      -
    274E  VAL*     3.5    34.1    -      -       +      -
    275E  GLN*     6.2     1.6    -      -       +      -
    278E  LEU*     3.8    20.2    -      -       +      -
    286E  ARG*     2.9    23.0    +      -       +      +
    287E  ALA*     3.9     5.4    -      -       -      +
    289E  SER*     1.3    75.3    -      -       -      +
    291E  THR*     1.3    58.9    +      -       -      +
    293E  ALA*     3.1     9.9    +      -       -      +
    294E  SER*     2.9    29.8    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with THR 291 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    214E  ALA      4.9     1.1    -      -       -      +
    215E  PHE*     3.1    39.0    -      -       +      +
    217E  SER      5.3     0.9    -      -       -      +
    271E  GLU*     3.1    21.8    +      -       -      +
    275E  GLN*     2.6    32.8    +      -       -      +
    287E  ALA      3.1    14.2    +      -       -      -
    288E  ALA*     4.0     5.6    -      -       -      -
    290E  ILE*     1.3    77.3    -      -       -      +
    292E  ARG*     1.3    58.5    +      -       -      +
    294E  SER*     3.1     4.0    +      -       -      -
    295E  ARG*     2.9    34.4    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 292 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    288E  ALA*     2.9    21.1    +      -       +      +
    289E  SER*     3.9     4.9    -      -       -      +
    291E  THR*     1.3    76.1    -      -       -      +
    293E  ALA*     1.3    63.1    +      -       -      +
    295E  ARG*     3.4    53.5    -      -       -      +
    296E  ILE*     4.0    21.9    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 293 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    289E  SER      2.9    14.7    +      -       -      +
    290E  ILE*     3.2    11.0    -      -       -      +
    292E  ARG*     1.3    74.9    -      -       -      +
    294E  SER*     1.3    65.6    +      -       -      +
    296E  ILE*     3.1     7.0    +      -       -      +
    297E  ALA*     2.9    26.7    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 294 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    215E  PHE*     3.4    27.4    -      -       -      -
    271E  GLU*     3.0    34.1    +      -       -      +
    290E  ILE*     2.9    14.4    +      -       -      +
    291E  THR      3.2     9.6    -      -       -      -
    293E  ALA*     1.3    75.6    -      -       -      +
    295E  ARG*     1.3    57.4    +      -       -      +
    296E  ILE      2.9     6.8    +      -       -      -
    297E  ALA*     4.2     3.4    -      -       -      -
    298E  PHE*     2.9    35.9    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 295 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    277D  TYR*     4.4    26.3    +      -       -      -
    215E  PHE*     2.9    45.2    +      -       +      -
    216E  TRP*     3.6    54.3    -      -       +      +
    288E  ALA      5.9     0.4    +      -       -      -
    291E  THR*     2.9    20.2    +      -       -      +
    292E  ARG*     3.4    54.9    -      -       -      +
    293E  ALA      3.2     0.6    -      -       -      -
    294E  SER*     1.3    74.6    -      -       -      +
    296E  ILE*     1.3    64.3    +      -       +      +
    299E  PRO*     3.7    16.7    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 296 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    292E  ARG*     4.0    24.0    +      -       -      +
    293E  ALA*     3.1     7.2    +      -       -      +
    294E  SER      3.0     0.6    -      -       -      -
    295E  ARG*     1.3    84.1    -      -       -      +
    297E  ALA*     1.3    68.8    +      -       -      +
    298E  PHE      3.3     1.6    -      -       -      -
    299E  PRO*     3.1    13.3    -      -       +      +
    300E  VAL*     3.2    31.2    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 297 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    293E  ALA*     2.9    21.6    +      -       +      +
    294E  SER*     4.1     4.3    -      -       -      +
    296E  ILE*     1.3    80.1    -      -       -      +
    298E  PHE*     1.3    61.4    +      -       +      +
    300E  VAL*     3.3     4.3    +      -       -      -
    301E  VAL*     2.9    43.4    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE 298 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    212E  TRP*     3.5    37.1    -      +       +      -
    215E  PHE*     3.4    33.2    -      +       +      -
    264E  PHE*     3.9     7.6    -      +       +      -
    267E  VAL*     3.6    38.8    -      -       +      -
    268E  ALA*     3.5    28.3    -      -       +      -
    271E  GLU*     4.4     5.2    -      -       +      -
    294E  SER*     2.9    31.7    +      -       -      +
    297E  ALA*     1.3    79.0    -      -       +      +
    299E  PRO*     1.4    70.2    -      -       +      +
    301E  VAL*     3.9     5.0    -      -       +      +
    302E  PHE*     3.2    17.7    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with PRO 299 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    212E  TRP*     3.7    32.7    -      -       +      +
    215E  PHE*     5.3     1.1    -      -       +      -
    216E  TRP*     6.3     0.2    -      -       +      -
    294E  SER      3.8     1.3    -      -       -      +
    295E  ARG*     3.7    20.6    -      -       -      +
    296E  ILE*     3.1    15.0    -      -       +      +
    298E  PHE*     1.4    90.0    -      -       +      +
    300E  VAL*     1.3    57.5    +      -       +      +
    302E  PHE*     3.4     3.2    -      -       +      +
    303E  LEU*     2.9    31.4    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 300 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    296E  ILE*     3.2    36.4    +      -       +      +
    297E  ALA*     3.7     6.1    -      -       -      +
    299E  PRO*     1.3    74.7    -      -       +      +
    301E  VAL*     1.3    60.6    -      -       +      +
    303E  LEU*     3.4     4.6    +      -       -      +
    304E  LEU*     2.8    51.8    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 301 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    264E  PHE*     3.3    25.6    -      -       +      -
    297E  ALA*     2.9    29.3    +      -       +      +
    298E  PHE*     3.9     5.6    -      -       +      +
    300E  VAL*     1.3    78.0    -      -       +      +
    302E  PHE*     1.3    58.3    +      -       -      +
    304E  LEU*     3.6     8.8    -      -       +      +
    305E  ALA*     2.8    35.8    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE 302 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    205E  LEU*     3.7    26.2    -      -       +      -
    208E  LEU*     3.4    27.8    -      -       +      -
    209E  PHE*     4.3    11.9    -      +       -      -
    212E  TRP*     3.7    13.5    -      +       +      -
    257E  ILE*     6.3     0.9    -      -       +      -
    260E  MET*     4.1     5.4    -      -       -      -
    261E  ILE*     4.1    17.9    -      -       +      -
    264E  PHE*     3.3    32.6    -      +       +      -
    298E  PHE      3.2    11.7    +      -       -      +
    299E  PRO      3.4     9.2    -      -       -      +
    300E  VAL      3.2     0.2    -      -       -      -
    301E  VAL*     1.3    75.6    -      -       -      +
    303E  LEU*     1.3    65.5    +      -       +      +
    304E  LEU      3.1     0.5    +      -       -      -
    305E  ALA*     3.1     2.9    +      -       -      +
    306E  ASN*     2.8    61.4    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 303 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    299E  PRO      2.9    15.8    +      -       -      +
    300E  VAL*     4.1     3.8    -      -       -      +
    302E  PHE*     1.3    83.6    -      -       +      +
    304E  LEU*     1.3    62.3    +      -       +      +
    306E  ASN*     4.1     5.6    -      -       -      +
    307E  ILE*     3.1    47.1    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 304 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    300E  VAL*     2.8    30.0    +      -       +      +
    301E  VAL*     3.6     8.7    -      -       +      +
    303E  LEU*     1.3    76.7    -      -       +      +
    305E  ALA*     1.3    54.6    +      -       -      +
    307E  ILE*     2.9    15.9    +      -       +      +
    308E  ILE*     2.8    48.8    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 305 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    260E  MET*     3.6    28.3    -      -       +      +
    264E  PHE*     4.9     2.7    -      -       +      -
    301E  VAL*     2.8    25.1    +      -       +      +
    302E  PHE      3.7     0.7    -      -       -      +
    304E  LEU*     1.3    72.9    -      -       -      +
    306E  ASN*     1.3    53.7    +      -       -      +
    308E  ILE*     3.3    13.3    -      -       -      +
    309E  LEU*     2.7    36.9    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASN 306 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    205E  LEU*     5.9     2.0    -      -       -      +
    253E  TYR*     4.7     9.4    +      -       -      -
    257E  ILE*     4.4    24.9    -      -       -      +
    260E  MET*     3.4    13.6    -      -       -      +
    302E  PHE*     2.8    55.3    +      -       -      +
    303E  LEU*     4.1     7.4    -      -       -      +
    305E  ALA*     1.3    73.6    -      -       -      +
    307E  ILE*     1.3    58.2    +      -       +      +
    309E  LEU*     3.7     3.7    -      -       -      +
    310E  ALA*     2.8    35.7    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 307 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    303E  LEU*     3.1    37.2    +      -       +      +
    304E  LEU*     2.9    14.9    +      -       +      +
    306E  ASN*     1.3    75.0    -      -       +      +
    308E  ILE*     1.3    72.7    +      -       +      +
    310E  ALA*     3.7     6.5    -      -       -      +
    311E  PHE*     3.2    24.3    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 308 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    304E  LEU*     2.8    41.4    +      -       +      +
    305E  ALA*     3.3    11.0    -      -       -      +
    307E  ILE*     1.3    84.2    -      -       +      +
    309E  LEU*     1.3    63.5    +      -       +      +
    311E  PHE*     3.6     6.4    +      -       -      +
    312E  LEU*     3.3    27.7    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 309 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    253E  TYR*     4.4     7.0    -      -       +      -
    256E  ALA*     3.8    17.7    -      -       +      -
    257E  ILE*     3.6    40.4    -      -       +      +
    260E  MET*     3.9    21.1    -      -       +      -
    305E  ALA      2.7    17.3    +      -       -      +
    306E  ASN*     3.7     5.2    -      -       -      +
    308E  ILE*     1.3    74.2    -      -       +      +
    310E  ALA*     1.3    65.7    +      -       -      +
    312E  LEU*     3.1    24.3    +      -       +      +
    313E  PHE*     3.3    29.8    +      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 310 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    253E  TYR*     4.1    21.7    -      -       -      +
    306E  ASN      2.8    22.7    +      -       -      +
    307E  ILE*     3.7     8.1    -      -       -      +
    309E  LEU*     1.3    73.7    -      -       -      +
    311E  PHE*     1.3    61.8    +      -       -      +
    313E  PHE      3.5     0.2    +      -       -      -
    314E  PHE*     3.3    31.5    +      -       +      +
    315E  GLY      4.0     0.2    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE 311 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    307E  ILE*     3.2    14.4    +      -       +      +
    308E  ILE*     3.9     4.9    -      -       -      +
    310E  ALA*     1.3    78.1    -      -       -      +
    312E  LEU*     1.3    75.6    +      -       +      +
    313E  PHE      3.0     1.4    +      -       -      -
    315E  GLY*     3.3    29.0    +      -       -      +
    316E  PHE*     3.2    48.9    +      +       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 312 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    308E  ILE*     3.3    17.7    +      -       +      +
    309E  LEU*     3.1    20.6    +      -       +      +
    311E  PHE*     1.3    89.1    -      -       +      +
    313E  PHE*     1.3    66.7    +      -       +      +
    316E  PHE*     4.0    33.2    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE 313 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    116E  ARG*     3.8    27.4    -      -       +      -
    117E  ARG*     4.7    11.1    +      -       +      +
    251E  MET*     3.3    30.1    -      -       +      -
    252E  THR      3.5    20.0    -      -       -      -
    253E  TYR*     3.6    33.2    -      +       +      -
    256E  ALA*     4.3    10.1    -      -       +      -
    309E  LEU*     3.3    25.5    +      -       +      +
    311E  PHE      3.1     0.4    -      -       -      -
    312E  LEU*     1.3    84.6    -      -       +      +
    314E  PHE*     1.3    84.2    +      -       +      +
    316E  PHE*     3.6    12.7    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE 314 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    117E  ARG*     3.8    63.3    +      -       +      +
    120E  PHE*     3.8    34.5    -      +       +      -
    253E  TYR*     3.8    37.5    -      +       +      -
    310E  ALA*     3.3    13.5    +      -       +      +
    313E  PHE*     1.3    91.1    -      -       +      +
    315E  GLY*     1.3    59.8    +      -       -      +
    316E  PHE*     3.2     8.2    +      -       -      +
----------------------------------------------------------
 Back to top of page


A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


   I  Hydrophilic      - N and O that can donate and accept hydrogen bonds
                         (e.g., oxygen of hydroxyl group of Ser. or Thr)
  II  Acceptor         - N or O that can only accept a hydrogen bond
 III  Donor            - N that can only donate a hydrogen bond
  IV  Hydrophobic      - Cl, Br, I and all C atoms that are not in
                         aromatic rings and do not have a covalent bond to
                         a N or O atom
   V  Aromatic         - C in aromatic rings irrespective of any other 
                         bonds formed by the atom
  VI  Neutral          - C atoms that have a covalent bond to at least one
                         atom of class I or two or more atoms from class II
                         or III; atoms; S, F, P, and metal atoms in all cases
 VII  Neutral-donor    - C atoms that have a covalent bond with only one
                         atom of class III
VIII  Neutral-acceptor - C atoms that have a covalent bond with only 
                         one atom of class II
For each pair of contacts the state of legitimacy is shown below:

Legend:
+, legitimate
-, illegitimate
------------------------------------------------------------
  Atomic class           I  II  III   IV   V   VI  VII  VIII
------------------------------------------------------------
   I  (Hydrophilic)      +   +    +    -   +   +    +    +
  II  (Acceptor)         +   -    +    -   +   +    +    -
 III  (Donor)            +   +    -    -   +   +    -    +
  IV  (Hydrophobic)      -   -    -    +   +   +    +    +
   V  (Aromatic)         +   +    +    +   +   +    +    +
  VI  (Neutral)          +   +    +    +   +   +    +    +
 VII  (Neutral-donor)    +   +    -    +   +   +    -    +
VIII  (Neutral-acceptor) +   -    +    +   +   +    +    -
------------------------------------------------------------
Warning!
Atom classes for heterogroups are automatically assigned based on the atomic coordinates. However, in three cases (see below) the automatic assignment is currently ambiguous. In these cases, the user is advised to manually analyse the full list of contacts using LPC software.
1. Carbon atoms belonging to a 4-, 5- or 6-member ring are 
   considered "aromatic" (Class V) if the ring is approximately
   planar, and "hydrophobic" (Class IV) or "neutral" (Classes
   VI, VII, VIII) if the ring is non-planar.
2. The oxygen atom of a carbonyl or hydroxy group is considered
   "hydroxy" (Class I) if the CO bond is longer than 1.29 Å, and
   "carbonyl" (Class II) if shorter.
3. All nitrogen atoms are considered "hydrophilic" (Class I).

Please E-mail any questions and/or suggestions concerning this page to Vladimir.Sobolev@weizmann.ac.il