Contacts of the helix formed by residues 375 - 398 (chain A) in PDB entry 3BNF


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 375 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    373A  GLY      4.1     7.2    -      -       -      +
    374A  ALA*     1.3    75.2    -      -       -      +
    376A  ASP*     1.3    66.1    +      -       -      +
    377A  ALA*     3.5     8.8    +      -       -      +
    378A  GLU*     2.8    41.0    +      -       -      +
    379A  LEU*     3.1    26.9    +      -       -      +
    435A  TYR*     4.5     3.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 376 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    374A  ALA      5.5     0.2    -      -       -      +
    375A  THR*     1.3    70.8    -      -       -      +
    377A  ALA*     1.3    61.7    +      -       -      +
    379A  LEU*     3.0     1.0    +      -       -      +
    380A  LYS*     2.7    34.0    +      -       -      +
    383A  ARG*     2.9    29.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 377 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    375A  THR*     3.2     8.7    +      -       -      +
    376A  ASP*     1.3    79.3    -      -       -      +
    378A  GLU*     1.3    61.7    +      -       +      +
    379A  LEU      3.2     0.3    +      -       -      -
    380A  LYS*     3.5    15.7    +      -       -      +
    381A  GLU*     4.9     1.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 378 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    374A  ALA*     3.2     5.1    -      -       +      -
    375A  THR*     2.8    44.6    +      -       -      +
    377A  ALA*     1.3    75.8    -      -       +      +
    379A  LEU*     1.3    61.0    +      -       +      +
    381A  GLU*     5.3     1.3    +      -       -      +
    382A  ILE*     4.2     4.9    +      -       -      +
    431A  VAL*     3.9    26.9    -      -       +      +
    434A  LYS*     2.8    39.0    +      -       -      +
    435A  TYR*     2.7    29.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 379 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    366A  THR*     4.3    10.3    -      -       +      +
    369A  ALA*     4.3     4.0    -      -       +      -
    370A  MET*     3.7    29.6    -      -       +      +
    374A  ALA*     4.2    15.9    -      -       +      +
    375A  THR      3.3    15.9    -      -       -      +
    376A  ASP*     3.0     2.2    +      -       -      +
    378A  GLU*     1.3    84.1    -      -       -      +
    380A  LYS*     1.3    66.1    +      -       -      +
    381A  GLU      3.3     2.9    -      -       -      -
    382A  ILE*     3.2    22.4    +      -       +      +
    383A  ARG*     2.8    53.9    +      -       +      +
    428A  LEU*     4.2    14.8    -      -       +      -
    431A  VAL*     4.3    15.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 380 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    376A  ASP      2.7    16.7    +      -       -      +
    377A  ALA*     3.5    11.3    +      -       -      +
    379A  LEU*     1.3    78.0    -      -       -      +
    381A  GLU*     1.3    58.1    +      -       +      +
    383A  ARG*     3.7     7.9    -      -       -      +
    384A  THR*     2.9    37.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 381 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    377A  ALA      4.9     1.2    +      -       -      -
    378A  GLU      5.3     1.2    +      -       -      +
    379A  LEU      3.3     0.6    -      -       -      -
    380A  LYS*     1.3    76.8    -      -       +      +
    382A  ILE*     1.3    67.8    +      -       +      +
    384A  THR*     3.3     8.0    +      -       -      -
    385A  HIS*     3.0    30.3    +      -       +      +
    427A  LYS*     3.1    35.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 382 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    366A  THR*     3.5    28.9    -      -       +      +
    378A  GLU      4.2     6.5    +      -       -      +
    379A  LEU*     3.2    16.0    +      -       +      +
    381A  GLU*     1.3    78.6    -      -       -      +
    383A  ARG*     1.3    58.5    +      -       -      +
    385A  HIS*     3.0    12.8    +      -       -      +
    386A  ILE*     2.9    32.5    +      -       +      +
    424A  ALA*     3.9     8.2    -      -       +      +
    427A  LYS*     3.5    39.3    -      -       +      -
    428A  LEU*     3.7    34.3    -      -       +      -
    431A  VAL*     3.8    18.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 383 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    268A  SER      2.8    26.9    +      -       -      +
    269A  LYS*     3.6    23.7    +      -       -      +
    270A  THR*     3.1    36.9    -      -       +      +
    271A  PRO*     4.5     9.0    -      -       +      -
    366A  THR*     4.2    10.5    -      -       +      +
    370A  MET*     3.3    30.3    -      -       -      +
    376A  ASP*     2.9    35.8    +      -       -      +
    379A  LEU*     2.8    43.7    +      -       -      +
    380A  LYS*     3.7     6.3    -      -       -      +
    382A  ILE*     1.3    72.4    -      -       +      +
    384A  THR*     1.3    58.5    +      -       -      +
    386A  ILE*     3.1     3.4    +      -       -      +
    387A  ARG*     2.8    27.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 384 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    271A  PRO*     6.1     0.9    -      -       -      +
    380A  LYS*     2.9    24.4    +      -       -      +
    381A  GLU*     3.6    10.8    -      -       -      -
    382A  ILE      3.3     0.2    -      -       -      -
    383A  ARG*     1.3    76.1    -      -       -      +
    385A  HIS*     1.3    64.5    +      -       +      +
    387A  ARG*     3.4    11.0    +      -       -      +
    388A  HIS*     3.0    50.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with HIS 385 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    381A  GLU*     3.0    27.6    +      -       -      +
    382A  ILE*     3.0     9.7    +      -       -      +
    384A  THR*     1.3    78.4    -      -       +      +
    386A  ILE*     1.3    58.5    +      -       -      +
    388A  HIS*     3.8     0.2    -      -       -      -
    389A  ALA*     2.8    30.3    +      -       -      +
    420A  GLU*     2.7    50.3    +      -       -      +
    423A  LYS*     3.9    27.5    -      -       +      +
    424A  ALA*     3.7    13.0    -      -       +      -
    427A  LYS*     2.8    40.1    +      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 386 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    268A  SER*     4.5     0.4    -      -       -      -
    270A  THR*     4.0    18.4    -      -       +      +
    272A  MET*     4.4     1.6    -      -       +      -
    359A  ILE*     5.0     7.2    -      -       +      +
    362A  ALA*     3.8    29.6    -      -       +      +
    363A  HIS*     3.3    39.3    -      -       +      +
    366A  THR*     3.4    27.8    -      -       -      +
    382A  ILE*     2.9    23.0    +      -       +      +
    383A  ARG*     3.6     7.2    -      -       -      +
    385A  HIS*     1.3    72.4    -      -       -      +
    387A  ARG*     1.3    67.4    +      -       -      +
    389A  ALA*     3.6     6.6    -      -       +      +
    390A  GLN*     2.9    25.3    +      -       -      +
    421A  ALA*     5.6     0.4    -      -       -      +
    424A  ALA*     4.0     8.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 387 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    255A  TYR      3.5    16.4    +      -       -      -
    256A  ASP*     2.8    31.9    +      -       -      +
    259A  ASN*     4.7     2.0    -      -       -      +
    260A  PHE      2.8    31.3    +      -       -      +
    261A  ALA*     4.3     0.2    -      -       -      +
    270A  THR*     3.8     6.2    -      -       +      +
    271A  PRO*     3.0    57.6    +      -       -      +
    272A  MET*     4.5     7.9    -      -       -      +
    273A  LEU*     3.8    31.3    +      -       +      +
    383A  ARG      2.8    20.0    +      -       -      +
    384A  THR*     3.6    10.5    -      -       -      +
    386A  ILE*     1.3    73.6    -      -       -      +
    388A  HIS*     1.3    68.3    +      -       +      +
    390A  GLN*     4.1     0.9    -      -       -      +
    391A  TRP*     3.0    29.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 388 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    252A  GLU*     3.4    37.3    -      -       +      +
    256A  ASP*     2.8    27.8    +      -       -      -
    384A  THR*     3.0    42.8    +      -       +      +
    385A  HIS      3.9     2.5    -      -       -      +
    387A  ARG*     1.3    88.6    +      -       +      +
    389A  ALA*     1.3    64.9    +      -       -      +
    391A  TRP*     3.7     1.5    -      -       +      +
    392A  ARG*     3.0    47.3    +      -       -      +
    420A  GLU*     4.0    13.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 389 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    359A  ILE*     4.0     8.1    -      -       +      -
    385A  HIS      2.8    22.3    +      -       -      +
    386A  ILE*     3.6     7.0    -      -       -      +
    388A  HIS*     1.3    72.3    -      -       -      +
    390A  GLN*     1.3    59.7    +      -       -      +
    392A  ARG      3.4     0.2    +      -       -      -
    393A  ALA*     2.9    27.2    +      -       -      +
    417A  GLY*     3.1    35.3    -      -       -      +
    420A  GLU*     3.6     9.5    -      -       +      +
    421A  ALA*     3.6    19.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 390 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     86A  ALA*     3.0    29.9    +      -       -      +
     87A  TRP*     3.5    22.8    -      -       -      +
    263A  TRP*     3.6     6.9    -      -       -      -
    272A  MET*     3.2    22.9    -      -       +      +
    273A  LEU      4.8     4.5    +      -       -      +
    356A  PHE*     4.5    11.7    -      -       +      -
    359A  ILE*     3.2    24.7    -      -       +      +
    363A  HIS*     2.8    28.6    +      -       -      -
    386A  ILE      2.9    16.3    +      -       -      +
    389A  ALA*     1.3    75.3    -      -       -      +
    391A  TRP*     1.3    62.0    +      -       -      +
    394A  ASP*     2.8    39.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with TRP 391 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    217A  GLU*     3.2    26.9    -      -       +      -
    248A  THR*     3.0    29.7    +      -       +      +
    251A  MET*     3.8    22.2    -      -       +      -
    252A  GLU*     3.3    38.5    -      -       +      +
    255A  TYR*     3.6    11.9    -      +       -      -
    273A  LEU*     3.5    42.0    +      -       +      -
    274A  LYS      3.6    22.9    -      -       -      -
    275A  ALA*     3.7    10.8    -      -       +      -
    387A  ARG      3.0    19.9    +      -       -      +
    388A  HIS*     3.7     4.0    -      -       -      +
    390A  GLN*     1.3    77.3    -      -       -      +
    392A  ARG*     1.3    58.7    +      -       -      +
    394A  ASP*     4.7     0.7    -      -       -      -
    395A  MET*     3.0    53.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 392 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    248A  THR*     4.1    20.9    -      -       +      -
    249A  GLU*     4.9    13.7    +      -       -      +
    252A  GLU*     2.9    39.3    +      -       -      +
    388A  HIS*     3.0    27.9    +      -       -      +
    389A  ALA      3.8     2.5    -      -       -      +
    391A  TRP*     1.3    74.4    -      -       -      +
    393A  ALA*     1.3    66.7    +      -       -      +
    395A  MET*     3.4     2.8    +      -       -      +
    396A  ALA*     3.1    21.5    +      -       -      +
    413A  LEU*     3.9    24.9    -      -       +      +
    416A  SER*     3.0    31.0    +      -       -      -
    417A  GLY*     4.1     7.2    -      -       -      +
    420A  GLU*     3.4    29.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 393 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    355A  ALA*     4.1     8.1    -      -       +      -
    356A  PHE*     3.7    20.9    -      -       +      -
    359A  ILE*     3.7    16.6    -      -       +      -
    389A  ALA      2.9    20.1    +      -       -      +
    390A  GLN      4.2     0.2    -      -       -      +
    392A  ARG*     1.3    73.7    -      -       -      +
    394A  ASP*     1.3    62.1    +      -       -      +
    396A  ALA*     3.2     5.4    +      -       -      +
    397A  ILE*     3.2    25.5    +      -       -      +
    413A  LEU      4.4     3.3    +      -       -      -
    414A  LEU*     3.9    18.2    -      -       +      -
    417A  GLY*     4.7     4.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 394 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     87A  TRP*     3.5    25.7    +      -       -      -
    273A  LEU      4.5     2.6    -      -       -      +
    274A  LYS*     2.8    35.3    +      -       -      +
    275A  ALA*     3.1    23.5    +      -       +      +
    356A  PHE*     3.9     7.0    -      -       +      -
    390A  GLN*     2.8    26.6    +      -       +      +
    391A  TRP*     4.1     2.5    -      -       -      +
    393A  ALA*     1.3    67.9    -      -       -      +
    395A  MET*     1.3    61.2    +      -       -      +
    397A  ILE*     3.0    12.2    +      -       -      +
    398A  ALA*     2.7    43.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 395 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    217A  GLU*     4.5     3.6    -      -       -      -
    246A  ILE      5.2     1.3    -      -       -      +
    248A  THR*     3.5    31.0    -      -       +      +
    251A  MET*     3.9    25.1    -      -       +      +
    275A  ALA*     3.4    11.6    -      -       +      +
    278A  PRO*     3.4    53.2    -      -       +      +
    281A  GLU*     5.3     0.2    -      -       +      -
    282A  LEU*     3.6    20.7    -      -       +      +
    391A  TRP*     3.0    61.4    +      -       +      +
    392A  ARG      3.6     4.5    -      -       -      +
    393A  ALA      3.3     0.2    -      -       -      -
    394A  ASP*     1.3    79.1    -      -       -      +
    396A  ALA*     1.3    59.0    +      -       -      +
    398A  ALA      4.2     0.9    +      -       -      -
    399A  GLY      4.6     0.5    +      -       -      -
    413A  LEU*     4.5     2.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 396 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    282A  LEU*     4.6     0.4    -      -       -      -
    348A  LYS*     5.4     1.0    -      -       -      +
    392A  ARG      3.1    12.9    +      -       -      +
    393A  ALA      3.3    11.0    -      -       -      +
    395A  MET*     1.3    79.9    -      -       -      +
    397A  ILE*     1.3    60.3    +      -       -      +
    399A  GLY      4.2     1.5    -      -       -      +
    402A  SER*     4.1     8.8    -      -       -      -
    403A  PHE      5.2     0.9    +      -       -      -
    410A  VAL*     3.7    38.9    -      -       +      +
    413A  LEU*     3.9    15.0    -      -       +      +
    414A  LEU*     3.6    27.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 397 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     83A  LEU*     3.6    24.2    -      -       +      -
     87A  TRP*     5.1     2.2    -      -       +      -
     96A  TYR*     4.7     3.8    +      -       +      +
    348A  LYS*     4.4    11.2    -      -       +      +
    352A  GLN*     3.4    40.8    -      -       +      +
    356A  PHE*     3.5    26.0    -      -       +      -
    393A  ALA      3.3    18.2    -      -       -      +
    394A  ASP*     3.0    15.1    +      -       -      +
    396A  ALA*     1.3    77.5    -      -       +      +
    398A  ALA*     1.3    66.7    +      -       -      +
    399A  GLY      3.2    10.6    +      -       -      +
    400A  HIS*     4.3    13.7    +      -       -      -
    414A  LEU*     3.9    17.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 398 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     96A  TYR*     4.5     8.2    +      -       -      +
    274A  LYS*     4.9     1.6    -      -       -      +
    275A  ALA*     3.7    20.2    -      -       +      +
    276A  GLN*     4.2     0.2    -      -       -      -
    277A  HIS*     3.4    30.0    +      -       -      +
    278A  PRO*     3.7     8.3    -      -       +      -
    394A  ASP*     2.7    29.5    +      -       -      +
    395A  MET      4.2     0.2    +      -       -      -
    396A  ALA      3.6     0.4    -      -       -      -
    397A  ILE*     1.3    74.5    -      -       -      +
    399A  GLY*     1.3    58.1    +      -       -      +
    400A  HIS*     3.6     6.5    +      -       -      -
    508A  HEM      3.5    13.9    -      -       -      +
----------------------------------------------------------
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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