Contacts of the helix formed by residues 390 - 413 (chain A) in PDB entry 3IFS


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 ASN 390 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      4A  HIS*     6.0     1.2    -      -       -      -
     95A  MSE      5.6     0.2    -      -       -      +
     96A  LEU*     3.5    11.5    -      -       -      +
    388A  GLU*     2.8    38.0    +      -       +      +
    389A  LEU*     1.3    74.9    -      -       -      +
    391A  GLU*     1.3    73.2    +      -       -      +
    392A  TYR*     3.6     9.4    +      -       -      +
    393A  THR*     2.7    33.5    +      -       -      -
    394A  PHE*     3.0    22.9    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 391 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     96A  LEU*     3.9    14.9    -      -       +      +
    224A  GLY      4.7     1.0    -      -       -      +
    225A  LEU*     3.5    28.5    -      -       +      +
    226A  ASN*     2.8    57.2    +      -       -      +
    229A  GLU*     4.2     5.8    -      -       +      +
    230A  MSE      3.4    21.8    -      -       +      +
    390A  ASN*     1.3    81.3    -      -       -      +
    392A  TYR*     1.3    64.0    +      -       -      +
    394A  PHE*     3.2     2.6    +      -       -      +
    395A  GLY      3.0    19.4    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with TYR 392 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      4A  HIS*     3.8    40.9    -      +       +      +
    229A  GLU*     3.4    38.5    +      -       +      +
    232A  LYS*     3.9    11.2    -      -       +      -
    233A  GLY*     3.2    38.5    -      -       -      -
    236A  ALA*     3.4    20.3    -      -       +      +
    390A  ASN*     3.4    10.6    +      -       -      +
    391A  GLU*     1.3    78.2    -      -       -      +
    393A  THR*     1.3    59.7    +      -       -      +
    395A  GLY      3.3     1.2    +      -       -      -
    396A  TYR*     3.0    27.3    +      +       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with THR 393 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      4A  HIS*     2.7    38.6    +      -       +      +
      5A  VAL*     4.4     5.6    -      -       +      -
     95A  MSE      6.5     0.4    -      -       -      -
    386A  ILE*     3.5    22.2    -      -       +      -
    387A  PRO*     4.2     5.4    -      -       +      -
    388A  GLU*     3.2    26.3    +      -       -      +
    389A  LEU*     5.5     0.4    -      -       +      -
    390A  ASN*     2.7    26.4    +      -       -      -
    392A  TYR*     1.3    72.9    -      -       -      +
    394A  PHE*     1.3    60.6    +      -       -      +
    396A  TYR*     3.2     1.3    +      -       -      +
    397A  LEU*     2.8    31.1    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE 394 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     88A  GLY*     4.1     9.2    -      -       -      -
     91A  ALA*     4.3     3.1    -      -       +      -
     92A  ALA*     3.4    39.9    -      -       +      -
     95A  MSE      3.7    27.5    -      -       +      -
     96A  LEU*     4.1    11.7    -      -       +      -
    211A  VAL*     4.4    13.2    -      -       +      -
    212A  LEU*     5.0     2.2    -      -       +      -
    230A  MSE      3.5    30.7    -      -       +      -
    281A  PHE*     4.0    23.8    -      +       -      -
    284A  TRP*     6.2     1.1    -      +       -      -
    390A  ASN      3.0    13.3    +      -       -      +
    391A  GLU      3.2     7.4    +      -       -      +
    393A  THR*     1.3    76.4    -      -       -      +
    395A  GLY*     1.3    63.1    +      -       -      +
    397A  LEU*     3.7     4.7    -      -       +      +
    398A  VAL*     2.9    47.2    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 395 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    212A  LEU*     5.1     2.7    -      -       -      -
    230A  MSE      3.6    30.3    -      -       -      -
    234A  ALA*     3.4    22.4    -      -       -      +
    391A  GLU      3.0    11.7    +      -       -      -
    392A  TYR      3.7     0.9    -      -       -      -
    394A  PHE*     1.3    80.3    -      -       -      +
    396A  TYR*     1.3    60.9    +      -       -      +
    398A  VAL*     3.5     5.1    +      -       -      +
    399A  TYR      3.3    16.6    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with TYR 396 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      3A  THR*     3.1    17.7    -      -       -      -
      4A  HIS*     3.3    25.5    +      +       +      -
      5A  VAL*     3.4    34.1    -      -       +      -
    233A  GLY*     3.3    25.9    -      -       -      +
    234A  ALA*     4.3     1.1    -      -       -      +
    236A  ALA*     3.7    10.5    -      -       +      -
    237A  GLY*     3.5    14.4    -      -       -      -
    240A  ASP*     2.2    38.2    +      -       -      +
    241A  PHE*     3.5    26.9    -      +       -      -
    392A  TYR*     3.0    19.3    +      +       +      +
    393A  THR*     3.6     8.3    -      -       -      +
    395A  GLY*     1.3    75.7    -      -       -      +
    397A  LEU*     1.3    58.3    +      -       -      +
    399A  TYR*     3.3     5.3    +      -       -      +
    400A  PHE*     2.9    24.3    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 397 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      5A  VAL*     4.1    17.0    -      -       +      -
     95A  MSE      4.8    12.6    -      -       +      -
    278A  LEU*     5.8     0.2    -      -       +      -
    281A  PHE*     3.5    35.7    -      -       +      -
    330A  LEU*     5.2     0.2    -      -       +      -
    384A  VAL*     3.9    21.3    -      -       +      -
    386A  ILE*     3.7    31.4    -      -       +      -
    393A  THR*     2.8    22.5    +      -       +      +
    394A  PHE*     3.7     5.2    -      -       -      +
    396A  TYR*     1.3    71.9    -      -       -      +
    398A  VAL*     1.3    65.4    +      -       -      +
    400A  PHE*     3.3     8.1    +      -       +      +
    401A  PHE*     3.1    44.2    +      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 398 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    211A  VAL*     3.7    17.0    -      -       +      -
    212A  LEU*     4.2    11.2    -      -       +      -
    281A  PHE*     4.2     7.2    -      -       +      -
    284A  TRP*     3.8    25.0    -      -       +      -
    394A  PHE*     2.9    54.4    +      -       +      +
    395A  GLY*     3.8     5.4    -      -       -      +
    397A  LEU*     1.3    75.3    -      -       -      +
    399A  TYR*     1.3    59.2    +      -       -      +
    401A  PHE      3.3     1.7    +      -       -      -
    402A  GLU*     2.9    54.4    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with TYR 399 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     36A  HIS*     5.2     0.5    -      -       -      -
     48A  TRP*     3.6    22.0    -      +       -      -
     49A  VAL*     2.7    45.5    +      -       -      +
     52A  PRO*     3.8    22.0    -      -       +      -
    212A  LEU*     5.4     2.0    -      -       +      -
    234A  ALA*     3.9    14.1    -      -       +      +
    237A  GLY*     3.6     8.7    -      -       -      -
    238A  ARG*     3.3    35.8    +      -       -      +
    241A  PHE*     4.2     5.4    -      +       +      -
    395A  GLY      3.3    11.3    +      -       -      +
    396A  TYR      3.7     7.0    -      -       -      +
    397A  LEU      3.2     0.6    -      -       -      -
    398A  VAL*     1.3    76.8    -      -       +      +
    400A  PHE*     1.3    67.7    +      -       -      +
    402A  GLU*     4.1    14.4    -      -       -      -
    403A  LYS*     2.9    46.9    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE 400 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      5A  VAL*     4.7    11.2    -      -       +      -
      6A  THR      5.6     0.2    -      -       -      -
      7A  PHE*     4.3    12.8    -      -       +      -
    241A  PHE*     3.7    36.0    -      +       +      -
    250A  PRO*     3.8    11.7    -      -       +      -
    251A  ALA*     3.6    30.6    -      -       -      +
    254A  TYR*     4.1    24.9    -      +       +      -
    384A  VAL*     4.0    18.2    -      -       +      -
    396A  TYR*     2.9    16.1    +      -       +      +
    397A  LEU*     3.4    15.9    -      -       +      +
    399A  TYR*     1.3    76.3    -      -       -      +
    401A  PHE*     1.3    97.7    +      +       -      +
    404A  ALA*     3.0    28.8    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE 401 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    254A  TYR*     3.5    34.5    -      +       -      -
    271A  LEU*     4.5     4.0    -      -       +      -
    281A  PHE*     3.7    29.2    -      +       -      -
    284A  TRP*     4.0     5.2    -      +       +      -
    285A  TRP*     3.7    27.4    -      +       -      -
    288A  LEU*     3.6    16.7    -      -       +      +
    289A  PHE*     3.8     4.8    -      +       +      -
    330A  LEU*     3.9    20.0    -      -       +      -
    384A  VAL*     4.3     6.7    -      -       +      -
    397A  LEU*     3.1    43.0    +      -       +      +
    398A  VAL      3.9     2.7    -      -       -      +
    400A  PHE*     1.3    94.4    -      +       -      +
    402A  GLU*     1.3    59.5    +      -       -      +
    404A  ALA*     3.7     2.2    -      -       -      +
    405A  CYS*     2.8    30.7    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 402 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48A  TRP*     3.6    38.1    -      -       +      +
    209A  PHE*     3.6    49.6    -      -       +      +
    211A  VAL*     4.2     4.3    -      -       -      +
    212A  LEU*     5.0     5.6    -      -       -      +
    284A  TRP*     4.1    13.5    -      -       +      -
    288A  LEU*     4.0     8.1    -      -       +      -
    398A  VAL*     2.9    42.4    +      -       +      +
    399A  TYR*     3.3    15.0    +      -       -      +
    401A  PHE*     1.3    75.7    -      -       -      +
    403A  LYS*     1.3    62.5    +      -       -      +
    405A  CYS*     3.3     3.7    +      -       -      +
    406A  ALA*     3.1    18.4    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 403 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     35A  ILE*     4.3    16.2    -      -       +      -
     36A  HIS*     2.8    35.1    +      -       -      -
     48A  TRP*     4.0    18.6    -      -       +      -
     49A  VAL*     4.3     3.1    -      -       -      -
    238A  ARG      6.0     0.4    -      -       -      -
    241A  PHE*     3.0    35.9    +      -       +      +
    242A  GLY*     4.3     0.4    -      -       -      -
    251A  ALA*     4.4     7.6    -      -       +      -
    252A  TYR*     2.7    38.3    +      -       +      +
    399A  TYR*     2.9    39.8    +      -       +      +
    400A  PHE      4.0     1.8    -      -       -      +
    402A  GLU*     1.3    74.3    -      -       -      +
    404A  ALA*     1.3    66.3    +      -       -      +
    406A  ALA*     3.4     3.6    +      -       -      +
    407A  MSE      3.2    21.7    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 404 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    251A  ALA*     3.4    29.8    -      -       +      +
    254A  TYR*     3.7    27.8    -      -       +      -
    255A  ALA*     3.5     6.5    -      -       -      +
    289A  PHE*     4.5     1.3    -      -       -      -
    400A  PHE*     3.0    20.1    +      -       +      +
    401A  PHE*     3.7     6.1    -      -       -      +
    403A  LYS*     1.3    76.3    -      -       -      +
    405A  CYS*     1.3    57.8    +      -       -      +
    407A  MSE      3.4     1.3    +      -       -      -
    408A  SER*     2.9    31.3    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with CYS 405 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    209A  PHE*     4.6     3.8    -      -       +      -
    288A  LEU*     3.5    25.8    -      -       +      -
    289A  PHE*     3.6    25.3    -      -       +      -
    292A  SER*     3.2    37.2    -      -       -      -
    293A  GLU*     4.4     1.9    -      -       -      +
    401A  PHE      2.8    19.2    +      -       -      +
    402A  GLU*     3.5     5.6    -      -       -      +
    403A  LYS      3.2     0.2    -      -       -      -
    404A  ALA*     1.3    74.2    -      -       -      +
    406A  ALA*     1.3    66.0    +      -       -      +
    408A  SER*     3.3     0.7    +      -       -      -
    409A  GLY*     3.0    22.3    +      -       -      -
    416A  PRO*     4.6     2.2    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 406 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     35A  ILE*     3.9    17.7    -      -       +      -
     48A  TRP*     3.8    19.3    -      -       +      -
    209A  PHE*     5.2     0.6    -      -       -      -
    402A  GLU      3.1    12.9    +      -       -      +
    403A  LYS*     3.7     9.2    -      -       -      +
    405A  CYS*     1.3    75.1    -      -       -      +
    407A  MSE      1.3    63.0    +      -       -      +
    409A  GLY      3.5     0.2    +      -       -      -
    410A  TYR*     3.1    30.4    +      -       -      -
    416A  PRO*     3.9     5.2    -      -       -      +
    417A  PHE*     3.9    24.5    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with MSE 407 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     28A  VAL*     3.6    32.5    -      -       +      +
     31A  THR*     3.5    24.7    -      -       +      -
     32A  HIS*     3.7    13.5    -      -       -      +
     35A  ILE*     4.2     6.7    -      -       +      +
    252A  TYR*     3.5    54.3    -      -       +      +
    255A  ALA*     3.6    16.4    -      -       +      -
    403A  LYS      3.2     5.4    +      -       -      +
    404A  ALA      3.7     7.0    -      -       -      +
    406A  ALA*     1.3    75.8    -      -       -      +
    408A  SER*     1.3    60.6    +      -       -      +
    410A  TYR*     3.3     2.9    +      -       -      -
    411A  LEU*     2.9    52.8    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 408 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    255A  ALA*     3.6    13.2    -      -       -      +
    258A  ARG*     2.8    22.1    +      -       -      +
    259A  ASN*     3.1    26.3    +      -       -      +
    289A  PHE*     4.4     2.7    -      -       -      -
    293A  GLU*     2.5    24.6    +      -       -      +
    404A  ALA      2.9    18.4    +      -       -      -
    405A  CYS*     3.7     6.3    -      -       -      -
    407A  MSE      1.3    75.7    -      -       -      +
    409A  GLY*     1.3    55.7    +      -       -      +
    411A  LEU*     3.3     0.7    +      -       -      -
    412A  LEU*     3.0    25.6    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 409 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    293A  GLU*     3.1    15.0    +      -       -      -
    405A  CYS      3.0    16.3    +      -       -      -
    406A  ALA      4.0     0.9    -      -       -      -
    408A  SER*     1.3    75.3    -      -       -      +
    410A  TYR*     1.3    61.8    +      -       -      +
    412A  LEU*     3.2     2.6    +      -       -      +
    413A  GLY      3.1    16.8    +      -       -      -
    414A  VAL*     3.1    27.0    +      -       -      +
    416A  PRO*     4.0    13.7    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with TYR 410 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     31A  THR*     3.5    34.3    -      -       +      +
     34A  ALA*     5.3     6.0    +      -       +      -
     35A  ILE*     3.7    27.6    -      -       +      -
     40A  GLY*     3.7    15.1    +      -       -      -
     41A  ALA*     2.6    42.8    +      -       +      -
     43A  ASN      4.7     1.7    +      -       -      -
     46A  LEU*     4.8     6.8    -      -       +      +
    406A  ALA      3.1    22.3    +      -       -      +
    407A  MSE      3.3     0.9    +      -       -      +
    409A  GLY*     1.3    74.8    -      -       -      +
    411A  LEU*     1.3    62.9    +      -       -      +
    413A  GLY*     3.2    12.5    +      -       -      -
    414A  VAL      4.1     6.1    -      -       -      -
    416A  PRO*     3.8    13.8    -      -       +      +
    417A  PHE*     3.5    23.6    -      +       -      -
     23D  TYR*     5.5     3.2    -      -       +      +
     24D  LEU*     5.7     0.5    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 411 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     24A  LEU*     4.4    22.2    -      -       +      -
     27A  ALA*     4.4    13.2    -      -       +      +
     28A  VAL*     4.5     1.3    -      -       +      -
     31A  THR*     4.4    11.9    -      -       -      +
    255A  ALA      4.4     3.6    -      -       -      +
    256A  VAL*     3.8    35.4    -      -       +      +
    259A  ASN*     4.0    14.4    -      -       +      +
    407A  MSE      2.9    51.7    +      -       +      +
    408A  SER      3.8     3.8    -      -       -      +
    410A  TYR*     1.3    73.5    -      -       -      +
    412A  LEU*     1.3    64.4    +      -       -      +
    413A  GLY*     3.4     0.9    +      -       -      -
     24D  LEU*     6.1     0.3    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 412 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    259A  ASN*     3.6    16.6    +      -       -      +
    262A  TYR*     3.9    31.2    -      -       +      -
    293A  GLU*     3.8    42.0    -      -       +      +
    298A  LYS*     4.4    13.0    +      -       +      +
    299A  GLY*     4.2    12.6    -      -       -      +
    408A  SER      3.0    16.9    +      -       -      +
    409A  GLY      3.2     5.3    +      -       -      +
    411A  LEU*     1.3    77.1    -      -       -      +
    413A  GLY*     1.3    58.2    +      -       -      +
    414A  VAL*     4.0    16.8    -      -       +      +
     24D  LEU*     5.4     0.9    -      -       -      +
    263D  ASN*     3.6    27.7    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 413 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    296A  ASP*     4.9     1.9    -      -       -      +
    298A  LYS*     4.3    10.9    +      -       -      -
    409A  GLY      3.1     3.0    +      -       -      -
    410A  TYR      3.2     9.4    +      -       -      -
    411A  LEU      3.2     3.6    -      -       -      -
    412A  LEU*     1.3    80.9    -      -       -      +
    414A  VAL*     1.3    62.9    +      -       -      +
     20D  GLU*     4.8     4.9    -      -       -      +
     23D  TYR*     3.6    21.9    -      -       -      +
     24D  LEU*     3.8    26.4    -      -       -      +
----------------------------------------------------------
 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