Contacts of the helix formed by residues 393 - 414 (chain F) in PDB entry 1B6C


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 PHE 393 (chain F).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    317F  HIS      4.8     0.2    -      -       -      -
    328F  ALA*     3.4    29.8    -      -       +      -
    329F  ILE      3.6     6.7    -      -       -      -
    330F  ALA*     3.6    27.8    -      -       +      -
    356F  VAL*     3.8    28.7    -      -       +      -
    357F  ARG      4.3     0.4    -      -       -      -
    358F  HIS*     3.6    50.5    -      +       +      +
    365F  ILE*     3.3    22.6    -      -       +      +
    391F  LYS      4.1     0.4    +      -       -      -
    392F  HIS*     1.3    71.2    -      -       -      +
    394F  GLU*     1.3    64.9    +      -       +      +
    396F  PHE*     2.8    27.6    +      +       -      +
    397F  LYS*     3.4    31.0    +      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 394 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    392F  HIS*     3.2     5.9    +      -       +      -
    393F  PHE*     1.3    79.8    -      -       +      +
    395F  SER*     1.3    64.8    +      -       -      +
    397F  LYS*     2.6    48.4    +      -       -      +
    398F  ARG*     2.9    57.6    +      -       -      +
    484F  THR*     5.6     1.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 395 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    382F  GLU*     4.6     2.1    -      -       -      +
    388F  ILE*     3.6    24.7    -      -       -      +
    389F  ASN*     3.1    28.8    +      -       -      +
    392F  HIS*     2.9    19.9    +      -       -      +
    394F  GLU*     1.3    79.3    -      -       -      +
    396F  PHE*     1.3    61.7    +      -       -      +
    398F  ARG*     3.5    15.8    +      -       -      +
    399F  ALA*     3.1    22.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 396 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    330F  ALA*     3.3    21.3    -      -       +      +
    332F  ARG*     3.6    40.8    -      -       +      +
    356F  VAL*     4.0    13.0    -      -       +      -
    365F  ILE*     4.0    15.9    -      -       +      -
    367F  ILE*     4.0    15.0    -      -       +      -
    388F  ILE*     4.7    10.5    -      -       +      -
    389F  ASN      5.1     0.2    -      -       -      -
    390F  MET*     3.8    53.2    -      -       +      -
    392F  HIS      4.0     6.1    -      -       -      -
    393F  PHE*     2.8    21.8    +      +       +      +
    395F  SER*     1.3    75.9    -      -       -      +
    397F  LYS*     1.3    65.5    +      -       -      +
    399F  ALA*     3.2     8.0    +      -       +      +
    400F  ASP*     3.1    24.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 397 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    317F  HIS*     3.5    60.8    +      -       +      +
    328F  ALA*     5.1     0.9    -      -       -      -
    330F  ALA*     4.5     0.9    -      -       +      +
    393F  PHE*     3.4    32.0    +      -       +      +
    394F  GLU*     2.6    43.7    +      -       -      +
    396F  PHE*     1.3    77.9    -      -       -      +
    398F  ARG*     1.3    64.4    +      -       +      +
    400F  ASP*     3.0     5.5    +      -       -      +
    401F  ILE*     3.0    27.0    +      -       +      +
    484F  THR*     5.7     2.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 398 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    382F  GLU*     4.9     1.1    -      -       -      +
    394F  GLU*     2.9    51.2    +      -       -      +
    395F  SER*     3.7    13.0    +      -       -      +
    397F  LYS*     1.3    76.6    -      -       +      +
    399F  ALA*     1.3    62.2    +      -       -      +
    401F  ILE*     3.4    12.3    +      -       +      +
    402F  TYR      3.2    13.2    +      -       -      -
    479F  GLY*     3.1    30.8    +      -       -      +
    480F  ALA*     3.6    31.5    +      -       -      +
    482F  ARG*     2.8    26.4    +      -       +      +
    483F  LEU      6.1     0.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 399 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    332F  ARG*     6.5     0.7    -      -       -      -
    378F  TYR      5.0     0.3    -      -       -      +
    380F  ALA*     4.0    26.5    +      -       +      +
    382F  GLU*     4.2     3.8    +      -       -      +
    383F  VAL*     4.5    14.4    -      -       +      -
    388F  ILE*     4.6     3.1    -      -       +      -
    395F  SER      3.1    14.9    +      -       -      +
    396F  PHE*     3.6    12.1    -      -       +      +
    397F  LYS      3.2     0.4    -      -       -      -
    398F  ARG*     1.3    74.4    -      -       -      +
    400F  ASP*     1.3    64.6    +      -       -      +
    402F  TYR*     3.3     5.4    +      -       -      +
    403F  ALA*     3.3    19.1    +      -       -      +
    482F  ARG*     3.9     1.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 400 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    313F  LEU*     4.1    10.5    -      -       +      -
    317F  HIS*     2.7    29.9    +      -       +      +
    330F  ALA*     3.5     4.2    -      -       -      -
    331F  HIS*     2.9    31.8    +      -       -      +
    332F  ARG*     2.9    29.0    +      -       -      -
    333F  ASP      4.6     0.2    +      -       -      -
    334F  LEU*     3.9     7.9    +      -       +      +
    396F  PHE      3.1    13.1    +      -       -      +
    397F  LYS      3.0     9.3    +      -       -      +
    399F  ALA*     1.3    76.5    -      -       -      +
    401F  ILE*     1.3    54.4    +      -       -      +
    403F  ALA*     2.9     9.1    +      -       -      +
    404F  MET*     2.7    34.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 401 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    313F  LEU*     4.2    10.3    -      -       +      -
    317F  HIS*     4.4     3.6    -      -       +      +
    397F  LYS*     3.0    18.4    +      -       +      +
    398F  ARG*     3.5    11.4    -      -       +      +
    399F  ALA      3.3     0.2    -      -       -      -
    400F  ASP*     1.3    76.5    -      -       -      +
    402F  TYR*     1.3    64.3    +      -       -      +
    404F  MET*     3.1     5.7    +      -       -      +
    405F  GLY      2.9    18.9    +      -       -      -
    474F  CYS*     3.4    34.1    -      -       +      +
    482F  ARG*     4.2     7.0    -      -       +      -
    483F  LEU      3.3    24.7    -      -       -      +
    484F  THR*     4.1     1.3    -      -       -      -
    485F  ALA*     3.5    40.6    -      -       +      +
    488F  ILE*     4.4     5.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 402 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    377F  ARG      4.7     0.2    +      -       -      -
    378F  TYR      3.6     9.2    -      -       -      -
    379F  MET      3.4    20.3    +      -       -      -
    380F  ALA*     3.5    16.8    -      -       +      -
    381F  PRO*     3.8    21.3    -      -       +      -
    398F  ARG      3.2     3.4    +      -       -      -
    399F  ALA      3.6     8.3    -      -       -      +
    400F  ASP      3.2     0.6    -      -       -      -
    401F  ILE*     1.3    79.8    -      -       -      +
    403F  ALA*     1.3    65.1    -      -       -      +
    405F  GLY*     3.3     2.4    +      -       -      -
    406F  LEU*     3.3    38.5    +      -       +      +
    428F  TYR*     2.4    38.2    +      -       -      -
    441F  MET*     5.5     0.2    -      -       -      +
    445F  VAL*     3.9     9.0    -      -       -      +
    451F  ARG*     4.2    13.0    -      -       -      -
    474F  CYS      3.4    23.7    +      -       -      +
    475F  TRP*     3.7    23.4    +      +       -      -
    482F  ARG*     3.9    17.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 403 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    334F  LEU*     3.9    31.2    -      -       +      +
    378F  TYR*     3.8    19.8    -      -       +      +
    399F  ALA      3.3     7.8    +      -       -      +
    400F  ASP*     2.9     9.9    +      -       -      +
    402F  TYR*     1.3    82.4    -      -       -      +
    404F  MET*     1.3    64.8    +      -       -      +
    406F  LEU*     3.0    17.5    +      -       -      +
    407F  VAL*     3.0    17.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 404 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    309F  THR*     3.1    43.5    -      -       +      +
    310F  ALA*     3.1    19.7    -      -       -      -
    313F  LEU*     3.2    32.5    -      -       +      -
    334F  LEU*     4.0    13.4    -      -       +      +
    400F  ASP      2.7    16.2    +      -       -      +
    401F  ILE*     3.1    10.7    +      -       +      +
    403F  ALA*     1.3    72.7    -      -       -      +
    405F  GLY*     1.3    59.1    +      -       -      +
    407F  VAL*     2.9     9.6    +      -       +      +
    408F  PHE*     2.8    59.7    +      -       +      -
    474F  CYS*     5.5     1.6    -      -       -      -
    485F  ALA*     5.3     2.2    -      -       +      -
    488F  ILE*     4.4    15.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 405 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    401F  ILE      2.9    13.0    +      -       -      -
    402F  TYR      3.6     5.2    -      -       -      -
    403F  ALA      3.1     0.4    -      -       -      -
    404F  MET*     1.3    77.5    -      -       -      +
    406F  LEU*     1.3    61.9    +      -       -      +
    408F  PHE*     3.1    10.8    +      -       -      +
    409F  TRP      3.0    16.6    +      -       -      -
    471F  MET*     4.0     5.4    -      -       -      +
    474F  CYS*     3.8    17.4    -      -       -      -
    475F  TRP*     3.5    21.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 406 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    377F  ARG      3.6    20.9    -      -       -      +
    378F  TYR*     3.8    18.6    -      -       +      +
    402F  TYR*     3.3    38.2    +      -       +      +
    403F  ALA*     3.0     7.2    +      -       -      +
    405F  GLY*     1.3    75.5    -      -       -      +
    407F  VAL*     1.3    63.0    +      -       -      +
    409F  TRP*     3.0     6.4    +      -       -      +
    410F  GLU*     3.0    23.7    +      -       -      +
    427F  PRO*     3.6    22.4    -      -       +      +
    428F  TYR*     4.1     9.0    -      -       +      +
    452F  PRO*     3.6    31.4    -      -       +      -
    475F  TRP*     3.4    22.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 407 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    288F  LEU*     3.7    29.2    -      -       +      -
    309F  THR*     4.9     3.6    -      -       +      -
    334F  LEU*     4.8     2.0    -      -       +      -
    335F  LYS*     4.0    31.0    -      -       -      +
    336F  SER*     4.0     6.3    -      -       -      +
    339F  ILE*     3.9    14.6    -      -       +      -
    378F  TYR*     4.0     6.7    -      -       +      -
    403F  ALA      3.0    17.7    +      -       -      +
    404F  MET*     2.9    14.0    +      -       +      +
    406F  LEU*     1.3    76.8    -      -       -      +
    408F  PHE*     1.3    66.1    +      -       +      +
    410F  GLU*     3.0    22.1    +      -       +      +
    411F  ILE*     3.0    19.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 408 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    306F  ALA*     3.5    38.1    -      -       +      -
    309F  THR*     4.3     9.0    -      -       +      -
    310F  ALA*     4.4     0.4    -      -       +      -
    404F  MET*     2.8    49.7    +      -       +      -
    405F  GLY*     3.5    10.3    -      -       -      +
    407F  VAL*     1.3    78.5    -      -       +      +
    409F  TRP*     1.3    61.8    +      -       -      +
    411F  ILE*     3.4     6.0    +      -       +      +
    412F  ALA*     2.9    26.7    +      -       -      +
    467F  MET*     3.7    24.2    -      -       +      +
    470F  ILE*     3.8    21.1    -      -       +      -
    471F  MET*     4.2    12.1    -      -       +      -
    488F  ILE*     3.6    28.0    -      -       +      -
    492F  LEU*     3.9     9.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with TRP 409 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    405F  GLY      3.0     8.0    +      -       -      +
    406F  LEU*     3.0    11.6    +      -       -      +
    408F  PHE*     1.3    78.8    -      -       -      +
    410F  GLU*     1.3    81.2    +      -       +      +
    412F  ALA*     3.3     1.4    +      -       -      +
    413F  ARG*     3.0    60.7    +      -       -      +
    425F  GLN*     3.5    15.5    -      -       +      -
    426F  LEU      3.5    17.0    -      -       -      -
    427F  PRO*     3.7    14.8    -      -       +      -
    428F  TYR      4.9     0.7    -      -       -      -
    429F  TYR*     3.7    28.0    -      +       -      -
    452F  PRO*     3.5    25.7    -      -       +      +
    453F  ASN*     2.8    32.4    +      -       +      -
    458F  TRP*     4.0    10.4    -      +       -      -
    471F  MET*     3.0    37.2    -      -       +      +
    475F  TRP*     3.9     6.7    -      +       +      -
----------------------------------------------------------
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Residues in contact with GLU 410 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    292F  LEU*     4.3     9.0    -      -       +      +
    336F  SER*     2.2    26.3    +      -       -      +
    378F  TYR*     2.4    36.3    +      -       -      -
    406F  LEU      3.0    15.7    +      -       -      +
    407F  VAL*     3.0    14.3    +      -       +      +
    409F  TRP*     1.3    82.8    -      -       +      +
    411F  ILE*     1.3    63.7    +      -       -      +
    413F  ARG*     3.5    13.1    -      -       -      +
    414F  ARG*     3.6    13.2    -      -       -      +
    424F  TYR*     2.3    36.2    +      -       +      -
    425F  GLN      3.8    14.3    +      -       -      +
    427F  PRO*     3.8    13.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 411 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    288F  LEU*     3.7    32.3    -      -       +      -
    292F  LEU*     4.0    15.3    -      -       +      -
    297F  VAL*     4.0     5.3    -      -       +      +
    302F  MET*     3.7    35.0    -      -       +      +
    305F  LEU*     4.0    28.5    -      -       +      +
    306F  ALA*     4.3    12.6    -      -       +      +
    309F  THR*     5.1     1.3    -      -       -      +
    407F  VAL*     3.0    20.3    +      -       +      +
    408F  PHE*     3.7    12.1    -      -       +      +
    410F  GLU*     1.3    74.5    -      -       -      +
    412F  ALA*     1.3    57.4    +      -       -      +
    414F  ARG*     2.7    30.8    +      -       -      +
    415F  CYS      3.4     3.6    +      -       -      -
    467F  MET*     5.1     1.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 412 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    302F  MET*     3.9    17.0    -      -       -      -
    408F  PHE      2.9    18.3    +      -       -      +
    409F  TRP*     4.6     0.2    -      -       -      -
    411F  ILE*     1.3    76.8    -      -       -      +
    413F  ARG*     1.3    63.2    +      -       -      +
    415F  CYS*     2.9    19.9    +      -       -      +
    457F  ARG*     5.3     1.0    +      -       -      -
    458F  TRP*     3.5    37.4    +      -       +      -
    464F  LEU*     4.0    14.2    -      -       +      +
    467F  MET*     4.8     7.4    -      -       +      -
    471F  MET*     4.8     2.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 413 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    409F  TRP*     3.0    57.1    +      -       -      +
    410F  GLU      3.5     8.3    -      -       -      +
    412F  ALA*     1.3    77.8    -      -       -      +
    414F  ARG*     1.3    58.9    +      -       +      +
    415F  CYS      3.8     0.3    +      -       -      +
    421F  HIS*     4.1     1.7    -      -       -      +
    422F  GLU*     2.9    63.2    +      -       +      +
    423F  ASP*     2.2    39.0    +      -       -      +
    424F  TYR*     6.1     0.2    -      -       -      -
    425F  GLN*     3.5    24.3    -      -       -      +
    429F  TYR*     3.1    25.6    +      -       -      -
    457F  ARG*     5.0     2.7    +      -       -      +
    458F  TRP*     3.7    14.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 414 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    292F  LEU*     2.7    56.2    +      -       +      -
    293F  ASN*     3.9    11.7    +      -       -      +
    294F  ARG      4.5     1.4    +      -       -      -
    295F  TYR      3.0    26.2    +      -       -      +
    296F  THR*     3.5    25.4    -      -       -      +
    297F  VAL*     2.7    33.1    +      -       +      -
    410F  GLU      3.6    15.0    -      -       -      +
    411F  ILE      2.7    10.5    +      -       -      +
    413F  ARG*     1.3    80.1    -      -       +      +
    415F  CYS*     1.3    61.7    +      -       -      +
    416F  SER      3.2     1.0    +      -       -      -
    421F  HIS*     3.7    11.0    +      -       -      -
    422F  GLU      3.1    26.1    +      -       -      -
    423F  ASP*     4.1     8.9    +      -       -      +
    424F  TYR*     3.8    21.5    -      -       +      +
----------------------------------------------------------
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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