Contacts of the helix formed by residues 358 - 379 (chain A) in PDB entry 4ASQ


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 THR 358 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    155A  LYS*     6.3     2.2    -      -       -      +
    286A  SER*     3.4    16.6    -      -       -      +
    289A  MET*     3.5    16.2    -      -       -      +
    290A  GLU*     5.9     0.9    -      -       -      +
    356A  ARG*     3.1    26.2    +      -       +      +
    357A  VAL*     1.3    82.0    -      -       -      +
    359A  GLN*     1.3    64.4    +      -       -      +
    360A  ASP*     3.7     7.1    +      -       -      +
    361A  GLN*     3.1    28.1    +      -       -      +
    362A  LEU      3.1    17.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 359 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    283A  VAL*     3.6    21.8    +      -       -      +
    284A  ASP*     3.3    15.3    -      -       -      +
    285A  VAL*     2.9    49.6    -      -       +      +
    286A  SER*     2.9    16.4    +      -       -      +
    289A  MET*     3.7     9.9    -      -       -      -
    358A  THR*     1.3    69.5    -      -       -      +
    360A  ASP*     1.3    66.0    +      -       -      +
    362A  LEU*     3.1    20.6    +      -       +      +
    363A  PHE*     3.2    39.8    +      -       +      -
    406A  SER*     5.5     1.4    -      -       -      +
    411A  LEU*     5.0     4.3    -      -       +      +
    433A  LEU*     4.7     8.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 360 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    268A  SER*     5.0     5.3    +      -       -      +
    269A  GLU*     4.4    17.5    -      -       -      +
    356A  ARG*     5.6     2.4    +      -       -      -
    358A  THR*     3.4     7.4    +      -       -      +
    359A  GLN*     1.3    78.9    -      -       -      +
    361A  GLN*     1.3    62.1    +      -       +      +
    363A  PHE*     3.2    22.1    +      -       -      +
    364A  THR*     3.0    32.9    +      -       -      -
    437A  ASP*     4.7     8.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 361 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    299A  MET*     3.7     4.5    -      -       +      -
    353A  GLN*     3.2    20.4    +      -       -      +
    354A  CYS      3.8     5.1    -      -       -      +
    355A  THR*     3.2     4.7    -      -       -      -
    356A  ARG*     3.0    75.8    +      -       -      +
    358A  THR*     3.1    21.8    +      -       -      +
    360A  ASP*     1.3    77.6    +      -       +      +
    362A  LEU*     1.3    60.8    +      -       -      +
    364A  THR*     3.2    22.0    +      -       -      +
    365A  VAL*     2.9    33.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 362 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    285A  VAL*     5.2     3.1    -      -       +      -
    289A  MET*     4.2    11.4    -      -       +      -
    294A  TYR*     5.1     0.2    -      -       +      -
    299A  MET*     3.6    35.1    -      -       +      +
    302A  MET*     4.5    20.0    -      -       +      -
    358A  THR      3.1    12.1    +      -       -      +
    359A  GLN*     3.1    12.2    +      -       -      +
    361A  GLN*     1.3    76.5    -      -       -      +
    363A  PHE*     1.3    61.2    +      -       +      +
    365A  VAL*     3.6     2.9    +      -       +      +
    366A  HIS*     2.9    44.8    +      -       +      +
    405A  VAL*     3.9    25.8    -      -       +      -
    411A  LEU*     4.8     6.5    -      -       +      -
    414A  ILE*     4.9     1.1    -      -       +      -
    416A  LEU*     4.3    23.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 363 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    359A  GLN*     3.2    45.7    +      -       +      -
    360A  ASP*     3.2    21.6    +      -       -      +
    362A  LEU*     1.3    78.2    -      -       +      +
    364A  THR*     1.3    58.0    +      -       -      +
    366A  HIS*     3.2     1.1    +      -       -      -
    367A  HIS*     2.8    28.4    +      -       -      +
    402A  SER*     3.0    36.9    +      -       -      +
    405A  VAL*     3.9    15.3    -      -       +      -
    406A  SER*     3.5    42.2    -      -       -      -
    411A  LEU*     5.8     1.6    -      -       +      -
    437A  ASP*     5.1    10.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with THR 364 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    338A  ALA*     4.2     4.9    -      -       +      -
    353A  GLN*     3.6    22.9    -      -       -      +
    360A  ASP*     3.0    19.2    +      -       -      -
    361A  GLN*     3.2    23.2    +      -       -      +
    363A  PHE*     1.3    74.0    -      -       -      +
    365A  VAL*     1.3    65.1    +      -       -      +
    367A  HIS*     3.2     8.3    +      -       +      +
    368A  GLU*     3.0    23.8    +      -       +      +
      2P  PRO*     3.6    34.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 365 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    299A  MET*     3.8    33.4    -      -       +      +
    300A  PHE*     3.7    40.0    -      -       +      -
    353A  GLN*     3.6    21.1    -      -       -      +
    355A  THR*     4.0     9.9    -      -       +      -
    361A  GLN      2.9    20.3    +      -       -      +
    362A  LEU*     3.7     7.2    -      -       -      +
    364A  THR*     1.3    75.1    -      -       -      +
    366A  HIS*     1.3    59.9    +      -       +      +
    368A  GLU*     3.4     1.9    +      -       -      +
    369A  LEU*     3.0    42.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with HIS 366 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    299A  MET      5.0     0.2    +      -       -      -
    302A  MET*     4.4     4.3    -      -       -      +
    303A  GLY*     3.6    32.1    +      -       -      -
    306A  PHE*     3.9    18.6    -      +       +      +
    307A  PHE*     4.3     4.8    -      -       -      -
    362A  LEU*     2.9    41.6    +      -       +      +
    363A  PHE*     3.2     2.3    +      -       -      +
    365A  VAL*     1.3    78.2    -      -       +      +
    367A  HIS*     1.3    65.3    +      -       -      +
    369A  LEU*     3.4     6.8    +      -       -      +
    370A  GLY      3.0    17.5    +      -       -      -
    398A  GLY*     3.2    15.3    -      -       -      +
    401A  LEU*     4.3    14.2    -      -       +      +
    402A  SER*     3.4    19.5    -      -       -      +
    405A  VAL*     3.6    32.6    -      -       +      +
    410A  HIS*     6.0     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with HIS 367 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    363A  PHE      2.8    13.6    +      -       -      +
    364A  THR*     3.2    13.2    +      -       -      +
    366A  HIS*     1.3    76.3    -      -       -      +
    368A  GLU*     1.3    80.8    +      -       +      +
    370A  GLY*     3.1    12.5    +      -       -      -
    371A  HIS*     3.2    11.9    +      -       -      -
    394A  HIS      5.4     0.7    -      -       -      +
    395A  GLU*     3.2    29.7    +      -       +      +
    398A  GLY*     3.7    12.2    +      -       -      -
    399A  ASP*     2.8    26.7    +      -       -      +
    402A  SER*     4.1     0.8    +      -       -      -
    507A  TYR*     4.6     1.6    -      +       -      -
   1615A   ZN      2.1    36.3    -      -       -      -
      1P  ARG      3.0     9.5    +      -       -      -
      2P  PRO*     4.0     6.5    -      -       +      -
      3P  PRO*     4.4    13.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 368 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    338A  ALA*     4.0    17.3    -      -       +      -
    339A  SER      4.0    11.7    -      -       -      +
    340A  ALA*     3.0    18.7    +      -       -      +
    351A  ILE*     3.6    21.7    -      -       +      +
    353A  GLN*     4.1     8.5    -      -       -      +
    364A  THR*     3.0    19.3    +      -       +      +
    365A  VAL      3.9     2.5    -      -       -      +
    367A  HIS*     1.3    84.4    -      -       -      +
    369A  LEU*     1.3    64.0    +      -       -      +
    371A  HIS*     3.2    15.7    +      -       -      +
    372A  ILE*     3.2    15.4    +      -       -      +
   1624A  FLC      3.0    22.2    -      -       -      +
      1P  ARG*     3.1    25.1    -      -       -      -
      2P  PRO*     3.1     9.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 369 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    300A  PHE*     3.9     9.4    -      -       +      +
    303A  GLY*     3.5    38.4    -      -       -      -
    304A  ASP*     3.8     3.4    -      -       -      +
    307A  PHE*     3.6    19.8    -      -       +      -
    315A  LEU*     3.7    34.3    -      -       +      +
    319A  PHE*     3.8     9.0    -      -       +      -
    351A  ILE*     3.7    19.7    -      -       +      -
    365A  VAL*     3.0    34.0    +      -       +      +
    366A  HIS*     3.9     2.7    -      -       -      +
    367A  HIS      3.3     0.2    -      -       -      -
    368A  GLU*     1.3    72.4    -      -       -      +
    370A  GLY*     1.3    59.9    +      -       -      +
    372A  ILE*     3.4     4.4    +      -       +      +
    373A  GLN*     2.9    30.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 370 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    307A  PHE*     3.7    12.3    -      -       -      -
    366A  HIS      3.0     9.9    +      -       -      -
    367A  HIS      3.1     7.3    +      -       -      -
    369A  LEU*     1.3    75.1    -      -       -      +
    371A  HIS*     1.3    62.4    +      -       -      +
    373A  GLN*     3.5     2.8    +      -       -      +
    374A  TYR*     3.1    22.0    +      -       -      +
    394A  HIS      4.9     0.9    -      -       -      -
    397A  VAL*     3.7    15.6    -      -       -      +
    398A  GLY*     3.6    20.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with HIS 371 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    340A  ALA*     3.6    12.8    -      -       +      -
    367A  HIS*     3.2    20.1    +      -       -      -
    368A  GLU*     3.2    15.1    +      -       -      +
    370A  GLY*     1.3    74.1    -      -       -      +
    372A  ILE*     1.3    64.7    +      -       -      +
    374A  TYR*     3.1     5.9    +      -       -      +
    375A  PHE*     3.0    30.8    +      -       +      -
    394A  HIS*     2.8    53.6    +      -       +      +
    395A  GLU*     3.2    18.4    -      -       -      -
   1615A   ZN      2.1    36.2    -      -       -      -
   1624A  FLC      3.2    24.7    +      -       +      -
      1P  ARG      3.2     1.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 372 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    315A  LEU*     3.5    28.9    -      -       +      -
    319A  PHE*     4.1     4.7    -      -       +      -
    340A  ALA*     3.9     9.6    -      -       +      -
    349A  VAL*     3.7    24.0    -      -       +      -
    350A  ARG      3.4    41.3    -      -       -      +
    351A  ILE*     3.6    17.5    -      -       +      -
    368A  GLU      3.2    12.9    +      -       -      +
    369A  LEU*     3.7     9.0    -      -       -      +
    370A  GLY      3.4     0.2    -      -       -      -
    371A  HIS*     1.3    75.9    -      -       -      +
    373A  GLN*     1.3    62.6    +      -       -      +
    375A  PHE*     3.1    13.9    +      -       +      +
    376A  LEU*     3.0    26.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 373 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    307A  PHE*     3.7    32.7    -      -       +      -
    312A  LEU*     3.5    13.5    -      -       +      +
    313A  THR*     2.9    47.3    +      -       -      +
    315A  LEU*     6.0     1.0    -      -       -      +
    369A  LEU      2.9    17.2    +      -       -      +
    370A  GLY      3.7     4.3    -      -       -      +
    371A  HIS      3.3     0.2    -      -       -      -
    372A  ILE*     1.3    75.1    -      -       -      +
    374A  TYR*     1.3    57.1    +      -       -      +
    376A  LEU*     3.2     8.7    +      -       -      +
    377A  GLN*     2.8    69.4    +      -       +      +
    556A  LEU*     4.2    12.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 374 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    370A  GLY      3.1     8.1    +      -       -      +
    371A  HIS      3.1    10.6    +      -       -      +
    373A  GLN*     1.3    78.7    -      -       -      +
    375A  PHE*     1.3    62.3    +      -       -      +
    377A  GLN*     3.2     3.7    +      -       -      +
    378A  TYR*     3.1    57.1    +      +       -      -
    388A  GLY*     3.8    11.7    -      -       -      -
    389A  ALA*     3.2    24.9    +      -       -      +
    393A  PHE*     3.8    16.9    -      -       +      +
    394A  HIS*     3.5    50.5    -      +       +      -
    397A  VAL*     3.7    10.8    -      -       +      -
    555A  MET*     4.8     3.8    +      -       -      +
    556A  LEU*     3.4    51.7    -      -       +      +
    559A  GLY*     4.5     5.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 375 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    340A  ALA*     3.8    11.2    -      -       +      -
    341A  TRP      3.6    33.0    -      -       -      -
    342A  ASP*     3.6    33.1    -      -       +      +
    349A  VAL*     3.8    14.8    -      -       +      -
    371A  HIS*     3.0    18.3    +      -       +      -
    372A  ILE*     3.3    17.0    -      -       +      +
    374A  TYR*     1.3    77.0    -      -       -      +
    376A  LEU*     1.3    61.3    +      -       -      +
    378A  TYR*     3.2    26.3    -      -       -      -
    379A  GLN*     3.1    27.9    +      -       -      +
    386A  ARG*     5.2     0.2    +      -       -      -
    394A  HIS*     3.4    23.6    -      +       -      -
   1624A  FLC      3.9    35.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 376 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    313A  THR*     4.2    30.6    +      -       +      +
    314A  LYS      4.0    12.8    -      -       -      +
    315A  LEU*     4.8     2.5    -      -       +      -
    316A  PRO*     3.9    24.0    -      -       +      -
    347A  ASP*     3.6    26.0    -      -       -      +
    349A  VAL*     4.0    22.2    -      -       +      -
    372A  ILE*     3.0    29.6    +      -       +      +
    373A  GLN*     3.7     9.0    -      -       -      +
    375A  PHE*     1.3    76.9    -      -       -      +
    377A  GLN*     1.3    64.7    +      -       -      +
    379A  GLN*     3.4    31.7    +      -       -      +
    380A  HIS*     5.3     0.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 377 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    312A  LEU*     3.8    10.5    -      -       -      +
    313A  THR*     3.3    12.4    +      -       -      -
    373A  GLN*     2.8    48.7    +      -       -      +
    374A  TYR      3.2     2.9    +      -       -      +
    376A  LEU*     1.3    77.0    -      -       -      +
    378A  TYR*     1.3    58.2    +      -       -      +
    379A  GLN      3.6     0.2    -      -       -      -
    380A  HIS*     3.2    22.1    +      -       -      -
    553A  HIS*     3.0    50.1    +      -       -      +
    556A  LEU*     3.6    33.9    -      -       +      -
    557A  SER*     3.3    15.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 378 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    342A  ASP*     3.8    11.6    +      -       -      -
    374A  TYR*     3.1    46.1    +      +       -      -
    375A  PHE*     3.2    30.9    -      +       -      -
    377A  GLN*     1.3    75.8    -      -       -      +
    379A  GLN*     1.3    56.9    +      -       -      +
    380A  HIS*     3.1    10.3    -      -       -      -
    381A  GLN*     3.0    34.2    +      -       +      +
    386A  ARG*     3.4    30.3    +      -       +      +
    387A  THR*     3.4    29.5    -      -       -      -
    394A  HIS*     2.8    23.5    +      -       -      -
    556A  LEU      3.7     8.3    -      -       -      +
    557A  SER      4.1     0.2    -      -       -      +
    559A  GLY*     3.6    24.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 379 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    345A  LEU      4.2     2.8    -      -       -      +
    346A  THR*     3.9    17.3    -      -       +      +
    347A  ASP*     3.0    46.1    +      -       -      +
    349A  VAL*     5.4     2.6    -      -       -      +
    375A  PHE      3.1    13.6    +      -       -      +
    376A  LEU*     3.4    29.0    +      -       -      +
    377A  GLN      3.6     0.8    -      -       -      -
    378A  TYR*     1.3    76.4    -      -       -      +
    380A  HIS*     1.3    62.5    +      -       +      +
    381A  GLN      3.3     1.3    -      -       -      +
    386A  ARG*     3.4    43.1    +      -       -      +
----------------------------------------------------------
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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