Contacts of the helix formed by residues 391 - 416 (chain D) in PDB entry 3IKM


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 391 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    169D  TRP*     4.9     7.8    +      -       -      +
    387D  GLU      5.3     1.1    -      -       -      +
    388D  ASN      3.7     3.2    +      -       -      +
    389D  PHE      3.1     1.4    -      -       -      -
    390D  GLN*     1.3   106.4    -      -       +      +
    392D  LEU*     1.3    54.4    +      -       +      +
    393D  MET      2.6    17.9    +      -       -      -
    394D  GLN*     2.8    14.3    +      -       -      +
    395D  TYR*     2.7    39.7    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 392 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    371D  LYS*     3.0    23.7    +      -       +      +
    374D  ARG*     2.8    71.6    -      -       +      +
    375D  GLU*     4.8     0.4    -      -       -      +
    378D  VAL*     5.6     4.0    -      -       +      -
    388D  ASN*     3.5    25.8    -      -       +      +
    391D  ASP*     1.3    79.0    -      -       +      +
    393D  MET*     1.3    58.8    +      -       -      +
    395D  TYR*     2.5    39.4    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with MET 393 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    211D  LEU*     5.5    13.5    -      -       +      -
    221D  TYR*     3.2    26.4    +      -       +      +
    371D  LYS*     3.1    22.7    -      -       -      +
    375D  GLU*     4.0    14.6    -      -       -      +
    385D  ILE*     3.8    30.7    -      -       +      +
    388D  ASN*     2.9    18.6    -      -       +      +
    389D  PHE*     2.7    52.5    -      -       +      +
    391D  ASP      2.6     5.1    +      -       -      -
    392D  LEU*     1.3    75.6    -      -       -      +
    394D  GLN*     1.3    60.8    +      -       -      +
    395D  TYR      2.8     5.4    -      -       -      -
    396D  CYS*     2.9     4.3    +      -       +      +
    397D  ALA      2.9    21.8    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 394 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    166D  PRO      4.8     0.4    -      -       -      +
    167D  PRO*     3.0    45.1    -      -       +      +
    169D  TRP*     4.2    20.2    -      -       +      +
    170D  ALA*     4.8     6.8    -      -       +      +
    220D  TRP*     6.2     3.1    -      -       +      -
    221D  TYR*     3.9     6.0    +      -       -      -
    389D  PHE      4.6     1.6    +      -       -      -
    390D  GLN      5.4     1.1    -      -       -      +
    391D  ASP*     2.8    13.8    +      -       -      +
    393D  MET*     1.3    73.7    -      -       -      +
    395D  TYR*     1.3    75.8    +      -       +      +
    397D  ALA*     3.8     4.8    -      -       -      +
    398D  GLN*     2.8    54.1    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with TYR 395 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    370D  GLU*     4.4    11.3    -      -       +      +
    371D  LYS*     3.7    19.3    -      -       +      +
    374D  ARG*     4.6    17.3    -      -       -      -
    391D  ASP*     2.7    56.9    +      -       +      +
    392D  LEU*     2.5    26.0    -      -       -      +
    393D  MET      2.8     0.2    -      -       -      -
    394D  GLN*     1.3    95.8    -      -       -      +
    396D  CYS*     1.3    64.7    +      -       -      +
    398D  GLN*     3.6     2.3    -      -       -      +
    399D  ASP*     2.9    23.3    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with CYS 396 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    200D  GLU*     5.4     4.9    -      -       -      -
    211D  LEU*     4.3    20.2    -      -       +      -
    370D  GLU      4.5     0.7    -      -       -      -
    371D  LYS*     2.9    51.7    -      -       -      +
    372D  GLU*     5.2     6.1    -      -       -      -
    375D  GLU*     5.7     4.3    -      -       -      -
    392D  LEU      3.2     0.2    +      -       -      -
    393D  MET*     2.9     5.8    +      -       -      +
    395D  TYR*     1.3    81.1    -      -       -      +
    397D  ALA*     1.3    67.3    +      -       -      +
    399D  ASP*     3.2     1.2    +      -       -      +
    400D  VAL*     2.9    35.7    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 397 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    198D  ASP*     4.7     2.0    -      -       -      -
    211D  LEU*     5.3     4.2    -      -       +      +
    212D  ALA      4.6     2.9    -      -       -      +
    213D  VAL*     3.2    36.3    -      -       +      -
    220D  TRP*     6.3     1.1    -      -       +      -
    221D  TYR*     4.2    12.3    -      -       +      +
    393D  MET      2.9    13.7    +      -       -      +
    394D  GLN*     3.8     6.1    -      -       -      +
    396D  CYS*     1.3    79.7    -      -       -      +
    398D  GLN*     1.3    64.0    +      -       -      +
    400D  VAL*     3.3    16.9    +      -       -      +
    401D  TRP*     3.5    14.0    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 398 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    165D  LYS*     4.4    27.6    -      -       +      +
    166D  PRO      2.6    29.7    +      -       -      +
    167D  PRO*     3.8     6.9    -      -       -      +
    213D  VAL*     5.0     0.2    -      -       -      +
    370D  GLU*     4.8     6.1    -      -       -      +
    394D  GLN*     2.8    41.5    +      -       -      +
    395D  TYR*     3.7     2.9    -      -       -      +
    397D  ALA*     1.3    73.1    -      -       -      +
    399D  ASP*     1.3    63.1    +      -       -      +
    401D  TRP*     3.2    25.8    +      -       +      +
    402D  ALA*     3.3    10.1    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASP 399 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    356D  LEU*     5.2     2.9    -      -       -      +
    366D  GLY      3.8    10.2    -      -       -      +
    367D  PRO*     3.4    18.6    -      -       -      +
    369D  LEU      3.8     0.3    -      -       -      -
    370D  GLU*     2.8    69.3    +      -       +      +
    372D  GLU*     5.6     0.2    -      -       -      +
    395D  TYR      2.9    11.4    +      -       -      +
    396D  CYS      3.9     0.9    -      -       -      +
    398D  GLN*     1.3    73.6    -      -       -      +
    400D  VAL*     1.3    51.8    +      -       +      +
    402D  ALA*     2.8    38.4    +      -       -      +
    403D  THR*     2.8    23.2    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 400 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    198D  ASP*     2.9    35.0    -      -       +      -
    270D  ASN*     5.6     3.4    -      -       +      -
    372D  GLU*     5.3     7.0    -      -       -      +
    396D  CYS*     2.9    40.4    +      -       -      +
    397D  ALA      3.3     9.2    -      -       -      +
    398D  GLN      3.2     0.2    -      -       -      -
    399D  ASP*     1.3    76.0    -      -       +      +
    401D  TRP*     1.3    57.0    +      -       -      +
    403D  THR*     3.0    20.9    -      -       +      +
    404D  HIS*     2.9    28.3    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with TRP 401 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    165D  LYS*     5.9     4.9    -      -       +      -
    166D  PRO*     4.8    19.3    -      -       +      -
    177D  ARG*     6.1     1.1    -      -       +      -
    196D  VAL*     3.4    14.8    +      -       +      -
    198D  ASP      3.6     3.0    -      -       -      +
    213D  VAL*     2.7    45.8    -      -       +      +
    214D  ALA*     2.4    55.9    -      -       -      -
    215D  ILE*     4.5    15.9    -      -       +      -
    218D  SER      4.6     2.7    -      -       -      -
    220D  TRP*     5.4     4.9    -      +       -      -
    397D  ALA      3.8    10.1    -      -       -      -
    398D  GLN*     3.2    16.2    +      -       +      +
    399D  ASP      2.9     1.2    -      -       -      -
    400D  VAL*     1.3    78.1    -      -       +      +
    402D  ALA*     1.3    68.8    +      -       -      +
    403D  THR      2.9     1.3    -      -       -      -
    404D  HIS*     2.6    47.3    +      +       +      +
    405D  GLU*     2.8    19.8    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 402 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    366D  GLY      6.4     0.4    -      -       -      -
    367D  PRO*     6.3     1.1    -      -       +      -
    370D  GLU*     5.9     0.2    -      -       -      +
    398D  GLN      3.3     5.0    +      -       -      +
    399D  ASP*     2.8    27.3    +      -       -      +
    401D  TRP*     1.3    78.1    -      -       -      +
    403D  THR*     1.3    60.5    +      -       -      +
    405D  GLU*     3.1     8.9    +      -       -      +
    406D  VAL*     2.6    37.8    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with THR 403 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    270D  ASN*     3.8    22.6    +      -       -      +
    355D  SER*     4.0    23.1    +      -       -      +
    356D  LEU*     5.6     6.7    -      -       +      -
    359D  VAL*     5.4     2.0    -      -       -      -
    367D  PRO      6.2     0.2    -      -       -      +
    399D  ASP*     2.8    23.3    +      -       -      +
    400D  VAL*     3.0    25.1    +      -       +      +
    402D  ALA*     1.3    77.0    -      -       -      +
    404D  HIS*     1.3    52.6    +      -       -      -
    406D  VAL*     3.3    11.4    -      -       -      +
    407D  PHE*     2.7    41.3    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with HIS 404 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    196D  VAL*     4.1    13.7    -      -       +      -
    197D  PHE      4.1    12.2    +      -       -      -
    198D  ASP*     5.3     0.2    -      -       -      -
    268D  GLY      3.1    25.8    +      -       -      +
    270D  ASN*     2.6    43.1    +      -       +      -
    294D  THR*     4.0     0.8    -      -       -      +
    400D  VAL*     2.9    30.4    +      -       +      +
    401D  TRP*     2.6    44.9    +      +       +      +
    403D  THR*     1.3    71.6    +      -       -      +
    405D  GLU*     1.3    57.3    +      -       -      +
    407D  PHE*     3.9     5.6    -      -       -      -
    408D  GLN*     2.3    49.9    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 405 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    163D  PRO*     5.9     4.2    -      -       -      +
    196D  VAL*     5.7     0.9    -      -       -      +
    215D  ILE*     3.5    28.8    -      -       -      +
    401D  TRP*     2.8    20.6    +      -       -      +
    402D  ALA*     3.4     8.7    -      -       -      +
    404D  HIS*     1.3    76.5    -      -       -      +
    406D  VAL*     1.3    69.4    +      -       -      +
    408D  GLN*     2.7    17.5    +      -       -      +
    409D  GLN*     2.7    46.0    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 406 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    298D  HIS*     4.7     1.3    -      -       -      +
    359D  VAL*     3.1    45.3    -      -       +      -
    362D  LEU*     4.3     3.0    -      -       +      +
    363D  TYR*     3.9    31.2    -      -       +      -
    367D  PRO*     5.9     2.9    -      -       +      -
    402D  ALA*     2.6    45.4    +      -       +      +
    403D  THR*     3.3     9.0    -      -       -      +
    405D  GLU*     1.3    74.3    -      -       -      +
    407D  PHE*     1.3    70.6    +      -       +      +
    410D  GLN*     2.9    30.6    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE 407 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    268D  GLY*     4.6     4.0    -      -       -      -
    270D  ASN*     4.0     2.2    -      -       -      -
    292D  LEU      4.4     7.0    -      -       -      -
    293D  ASP      4.2     0.9    -      -       -      -
    294D  THR*     2.7    53.2    -      -       +      -
    297D  MET*     3.4    16.8    -      -       +      -
    298D  HIS*     2.9    31.2    -      +       +      +
    359D  VAL*     5.7     0.9    -      -       +      -
    403D  THR*     2.7    19.6    +      -       -      +
    404D  HIS*     3.7    14.1    -      -       -      -
    405D  GLU      2.8     0.4    +      -       -      -
    406D  VAL*     1.3    84.0    -      -       +      +
    408D  GLN*     1.3    76.8    +      -       +      -
    411D  LEU*     2.6    64.7    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 408 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    154D  ALA*     6.0     0.2    -      -       -      +
    157D  LEU*     5.3     8.3    -      -       -      +
    158D  LEU*     4.1    27.2    -      -       +      +
    196D  VAL*     4.0     7.4    -      -       -      +
    265D  LEU*     6.3     0.2    -      -       -      +
    266D  VAL*     4.8     9.5    +      -       -      +
    267D  VAL      5.0     0.6    +      -       -      -
    268D  GLY*     3.1    35.3    -      -       -      +
    297D  MET*     5.5     3.1    -      -       -      -
    404D  HIS*     2.3    38.9    +      -       -      +
    405D  GLU*     2.7     4.2    +      -       -      +
    407D  PHE*     1.3    87.4    -      -       +      +
    409D  GLN*     1.3    53.4    +      -       +      +
    411D  LEU*     2.8     9.6    -      -       +      +
    412D  PRO*     2.7    35.1    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 409 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    157D  LEU      4.1     2.6    +      -       -      -
    158D  LEU*     2.6    45.6    +      -       +      +
    160D  ALA      2.6    21.8    +      -       -      -
    161D  GLN*     5.5     2.8    -      -       -      +
    405D  GLU*     2.7    39.5    +      -       -      +
    408D  GLN*     1.3    77.1    -      -       +      +
    410D  GLN*     1.3    63.4    +      -       +      +
    412D  PRO*     2.6    25.5    -      -       -      +
    413D  LEU*     4.3     6.6    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 410 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    362D  LEU*     3.7    39.7    +      -       +      +
    363D  TYR*     4.8    14.7    -      -       +      -
    406D  VAL*     2.9    28.6    +      -       -      +
    408D  GLN      3.2     1.2    -      -       -      -
    409D  GLN*     1.3    86.0    -      -       +      +
    411D  LEU*     1.3    50.0    +      -       -      +
    412D  PRO*     2.7    13.9    -      -       -      +
    413D  LEU*     3.9     6.1    +      -       -      +
    414D  PHE*     2.6    41.1    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 411 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    297D  MET*     2.9    40.8    -      -       +      +
    298D  HIS*     2.9    28.0    -      -       +      +
    301D  ILE*     5.1     6.5    -      -       +      -
    361D  ARG*     5.3     0.7    -      -       -      +
    362D  LEU*     4.0    11.2    -      -       +      +
    407D  PHE*     2.6    54.1    +      -       +      +
    408D  GLN*     2.8    29.2    -      -       +      +
    410D  GLN*     1.3    70.6    -      -       -      +
    412D  PRO*     1.3    52.2    -      -       +      +
    413D  LEU      3.3     0.2    -      -       -      -
    414D  PHE*     3.8     9.8    -      -       +      -
    415D  LEU*     2.5    46.1    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with PRO 412 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    158D  LEU*     3.5    31.9    -      -       +      -
    297D  MET*     4.5     6.7    -      -       -      -
    408D  GLN*     2.7    15.7    -      -       +      +
    409D  GLN      2.6    31.0    -      -       -      +
    410D  GLN      2.7     8.7    -      -       -      +
    411D  LEU*     1.3    79.3    -      -       +      +
    413D  LEU*     1.3    71.0    +      -       +      +
    415D  LEU*     2.8     7.9    -      -       +      +
    416D  GLU*     2.7    47.1    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 413 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    158D  LEU*     5.7     1.6    -      -       +      -
    409D  GLN      4.3     8.5    -      -       -      +
    410D  GLN*     4.4     5.6    -      -       -      +
    412D  PRO*     1.3    93.5    -      -       +      +
    414D  PHE*     1.3    67.6    +      -       +      +
    415D  LEU      2.8     5.2    -      -       -      -
    416D  GLU*     2.7    30.4    +      -       -      +
    417D  ARG*     2.9    30.6    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE 414 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    301D  ILE*     2.7    32.9    -      -       +      +
    361D  ARG*     6.1     2.0    -      -       -      +
    362D  LEU*     4.0    17.0    -      -       +      -
    410D  GLN*     2.6    61.7    -      -       +      -
    411D  LEU*     3.8     5.8    -      -       +      -
    412D  PRO      3.6     0.2    -      -       -      -
    413D  LEU*     1.3    84.7    -      -       +      +
    415D  LEU*     1.3    51.0    +      -       -      +
    417D  ARG*     2.6    54.6    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 415 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    292D  LEU*     5.2     0.2    -      -       +      -
    297D  MET*     3.0    70.2    -      -       +      +
    301D  ILE*     3.6    22.4    -      -       +      +
    411D  LEU*     2.5    30.3    +      -       +      +
    412D  PRO*     2.8     9.4    -      -       +      +
    413D  LEU      2.8     0.8    -      -       -      -
    414D  PHE*     1.3    76.1    -      -       -      +
    416D  GLU*     1.3    53.0    +      -       +      +
    417D  ARG      2.6    13.1    +      -       -      -
    418D  CYS*     3.2    17.5    +      -       -      +
    424D  LEU*     5.5    11.8    -      -       +      +
    427D  MET*     5.1     9.0    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 416 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    151D  LEU*     6.0     1.4    -      -       -      +
    412D  PRO*     2.7    26.7    +      -       +      +
    413D  LEU*     2.7    44.4    +      -       -      +
    415D  LEU*     1.3    70.2    -      -       +      +
    417D  ARG*     1.3    56.2    +      -       -      +
    418D  CYS      2.7    11.0    +      -       -      +
    419D  PRO*     3.2    23.1    -      -       +      +
    424D  LEU*     5.0    19.1    -      -       +      -
----------------------------------------------------------
 Back to top of page


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


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

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

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