Contacts of the helix formed by residues 404 - 426 (chain T) in PDB entry 4UJ3


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 SER 404 (chain T).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    379T  CYS*     3.6    20.9    -      -       -      -
    382T  THR*     4.4     4.4    +      -       -      -
    384T  GLN*     6.2     2.2    -      -       -      -
    386T  LYS*     4.9    13.9    -      -       -      -
    388T  CYS*     3.5     9.8    -      -       -      -
    390T  HIS*     6.0     0.2    -      -       -      -
    403T  ILE*     1.3    87.1    -      -       -      +
    405T  PRO*     1.3    77.8    -      -       -      +
    406T  PHE*     3.6    10.3    +      -       -      +
    407T  CYS*     3.0    35.2    +      -       -      -
    408T  ARG*     3.2     3.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with PRO 405 (chain T). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    386T  LYS*     4.9    13.5    -      -       +      -
    387T  SER*     3.6    21.8    -      -       -      +
    388T  CYS*     5.0     0.2    -      -       -      -
    389T  LYS*     5.6     6.0    -      -       +      +
    390T  HIS*     5.4     7.4    -      -       +      +
    403T  ILE      4.5     0.2    -      -       -      +
    404T  SER*     1.3    90.0    -      -       -      +
    406T  PHE*     1.3    62.2    +      -       +      +
    408T  ARG*     3.4     9.2    +      -       +      +
    409T  TYR*     3.4    17.5    +      -       -      +
    456T  PHE*     4.0    16.6    -      -       +      -
    457T  LYS      5.0     2.1    -      -       -      +
    458T  GLU*     3.8    40.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 406 (chain T). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    335T  PHE*     4.8     1.8    -      +       -      -
    382T  THR*     5.4     8.7    -      -       +      -
    386T  LYS*     6.3     2.5    -      -       +      -
    404T  SER*     3.1    10.3    -      -       -      +
    405T  PRO*     1.3    83.0    -      -       +      +
    407T  CYS*     1.3    68.8    +      -       -      +
    408T  ARG      3.4     0.2    +      -       -      -
    409T  TYR*     3.4     5.0    +      -       -      +
    410T  ARG*     3.1    65.8    +      -       +      +
    451T  ALA      3.9     7.6    -      -       -      -
    452T  LYS      5.5     0.7    -      -       -      -
    453T  LEU      5.5     0.2    -      -       -      -
    454T  GLY*     3.4    33.2    -      -       -      -
    456T  PHE*     3.8    36.7    -      +       +      -
----------------------------------------------------------
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Residues in contact with CYS 407 (chain T). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    335T  PHE*     3.4    32.8    -      -       -      -
    379T  CYS*     3.6    22.9    -      -       -      -
    381T  LEU*     3.7    17.9    -      -       +      -
    382T  THR*     4.2     5.8    -      -       -      -
    403T  ILE*     3.1    23.6    -      -       +      -
    404T  SER*     3.0    15.5    +      -       -      +
    406T  PHE*     1.3    80.6    -      -       -      +
    408T  ARG*     1.3    56.1    +      -       -      +
    410T  ARG*     3.1     2.8    +      -       -      +
    411T  ILE*     2.8    34.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 408 (chain T). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    130S  HIS      3.8    19.2    +      -       -      -
    131S  LEU*     4.7    15.0    +      -       -      +
    132S  ARG      5.7     1.4    +      -       -      -
    355T  ILE*     4.1    14.0    -      -       +      +
    390T  HIS*     3.4    51.2    +      -       +      +
    392T  ILE*     5.7     0.4    -      -       +      -
    403T  ILE*     3.7     8.9    -      -       +      +
    404T  SER      3.2     8.8    +      -       -      +
    405T  PRO*     3.8    10.5    +      -       +      +
    406T  PHE      3.3     0.2    -      -       -      -
    407T  CYS*     1.3    78.8    -      -       -      +
    409T  TYR*     1.3    59.9    +      -       -      +
    411T  ILE*     4.5     4.5    -      -       -      -
    412T  THR*     2.7    62.9    +      -       +      +
    457T  LYS      5.7     4.2    +      -       -      -
    459T  GLU*     3.7    30.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 409 (chain T). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    405T  PRO      3.4     8.7    +      -       -      +
    406T  PHE      3.8     4.7    -      -       -      +
    407T  CYS      3.3     0.6    -      -       -      -
    408T  ARG*     1.3    84.7    -      -       -      +
    410T  ARG*     1.3    57.6    +      -       -      +
    412T  THR*     3.5     8.0    +      -       -      -
    413T  SER*     2.5    45.4    +      -       -      -
    447T  GLU*     2.3    41.8    +      -       -      +
    450T  LEU*     5.2     5.6    -      -       +      +
    451T  ALA*     3.7    22.9    -      -       +      -
    455T  TYR      3.4     8.3    -      -       -      -
    456T  PHE*     3.0    46.4    -      -       +      -
    457T  LYS*     3.7    31.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 410 (chain T). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    331T  PRO      2.7    29.7    +      -       -      -
    332T  CYS*     3.1    32.3    +      -       -      +
    333T  LEU*     5.0     0.4    -      -       -      -
    334T  THR*     3.7    18.4    +      -       -      -
    335T  PHE*     3.7    17.8    -      -       +      -
    382T  THR*     5.4     1.0    -      -       -      +
    406T  PHE*     3.1    53.3    +      -       +      +
    407T  CYS      3.1     7.5    +      -       -      +
    409T  TYR*     1.3    79.0    -      -       +      +
    411T  ILE*     1.3    59.9    +      -       -      +
    413T  SER*     3.6     1.9    -      -       -      -
    414T  VAL*     3.0    30.7    +      -       -      +
    451T  ALA*     3.9    30.8    +      -       +      +
    452T  LYS      3.9    15.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 411 (chain T). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    333T  LEU*     4.4    18.4    -      -       +      -
    335T  PHE*     4.6     3.8    -      -       +      -
    344T  VAL*     4.2    19.1    -      -       +      -
    348T  VAL*     4.9     2.0    -      -       +      -
    353T  LEU*     3.5    31.4    -      -       +      -
    355T  ILE*     4.1    10.1    -      -       +      -
    381T  LEU*     3.5    32.1    -      -       +      -
    392T  ILE*     4.4    19.5    -      -       +      -
    403T  ILE*     5.1     0.2    -      -       +      -
    407T  CYS*     2.8    22.9    +      -       +      +
    408T  ARG*     3.9     4.0    -      -       -      +
    410T  ARG*     1.3    75.3    -      -       -      +
    412T  THR*     1.3    60.9    +      -       -      +
    414T  VAL*     3.1     5.0    +      -       -      +
    415T  CYS*     2.9    28.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with THR 412 (chain T). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    130S  HIS*     3.7    22.4    -      -       +      +
    131S  LEU*     4.6     7.0    -      -       +      -
    355T  ILE*     3.5    24.9    -      -       +      -
    408T  ARG*     2.7    53.2    +      -       +      +
    409T  TYR*     3.5    13.3    +      -       -      -
    411T  ILE*     1.3    72.5    -      -       -      +
    413T  SER*     1.3    53.7    +      -       -      +
    415T  CYS*     3.2     9.8    +      -       -      +
    416T  ASN*     2.8    43.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 413 (chain T). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    409T  TYR*     2.5    52.0    +      -       -      -
    410T  ARG*     3.6     7.2    -      -       -      -
    412T  THR*     1.3    79.7    +      -       -      +
    414T  VAL*     1.3    59.5    +      -       -      +
    416T  ASN*     3.6    12.2    +      -       -      +
    417T  PHE*     3.4    14.7    +      -       -      +
    444T  LEU*     4.7     4.5    -      -       -      +
    447T  GLU*     4.3    10.4    +      -       -      +
    448T  MET*     3.8    33.5    -      -       -      +
    451T  ALA*     4.3     1.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 414 (chain T). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    329T  ILE*     3.7    30.7    -      -       +      +
    332T  CYS*     3.6    30.1    -      -       +      -
    333T  LEU*     4.1    16.4    -      -       +      -
    348T  VAL*     4.3     9.2    -      -       +      -
    410T  ARG      3.0    17.0    -      -       -      +
    411T  ILE      3.1     7.1    +      -       -      +
    413T  SER*     1.3    75.2    -      -       -      +
    415T  CYS*     1.3    65.2    +      -       -      +
    417T  PHE*     3.1    12.0    +      -       -      +
    418T  PHE*     3.2    28.4    +      -       +      -
    448T  MET*     4.0    12.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with CYS 415 (chain T). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    130S  HIS*     3.4    40.0    -      -       +      +
    348T  VAL*     3.8    23.8    -      -       -      -
    353T  LEU*     3.7    31.2    -      -       -      -
    411T  ILE*     2.9    23.3    +      -       -      +
    412T  THR      3.5     2.7    -      -       -      +
    414T  VAL*     1.3    77.4    -      -       -      +
    416T  ASN*     1.3    55.5    +      -       -      +
    418T  PHE*     3.4     2.3    +      -       -      +
    419T  THR*     2.8    30.3    +      -       -      -
    422T  ARG*     5.0     0.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 416 (chain T). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    130S  HIS*     2.9    21.7    +      -       -      -
    131S  LEU*     4.1    15.1    -      -       -      +
    412T  THR*     2.8    27.6    +      -       -      +
    413T  SER*     3.6    10.8    -      -       -      +
    414T  VAL      3.2     0.2    -      -       -      -
    415T  CYS*     1.3    74.3    -      -       -      +
    417T  PHE*     1.3    65.6    +      -       -      +
    419T  THR*     3.0    26.4    -      -       +      +
    420T  TYR*     3.1     5.9    +      -       -      +
    444T  LEU*     3.6    21.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 417 (chain T). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    321T  LEU*     3.9    16.4    -      -       +      -
    324T  ILE*     3.3    44.0    -      -       +      -
    329T  ILE*     4.2    13.7    -      -       +      -
    413T  SER      3.4     3.9    +      -       -      +
    414T  VAL      3.1     8.3    +      -       -      +
    416T  ASN*     1.3    78.2    -      -       -      +
    418T  PHE*     1.3    78.2    +      +       -      +
    420T  TYR*     3.2     4.4    +      -       +      +
    421T  ILE*     2.9    64.6    +      -       +      +
    441T  VAL*     4.2    11.4    -      -       +      -
    444T  LEU*     3.6    24.6    -      -       +      +
    445T  ARG*     4.9     1.6    -      -       +      -
    448T  MET*     4.0    29.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 418 (chain T). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    314T  MET*     3.8    29.2    -      -       +      -
    316T  ARG*     5.6     0.2    -      -       -      -
    321T  LEU*     5.5     3.4    -      -       +      -
    325T  TYR*     3.0    40.8    -      +       -      -
    329T  ILE*     3.4    26.5    -      -       +      -
    348T  VAL*     3.6    36.1    -      -       +      +
    349T  GLU*     4.1    16.6    -      -       +      -
    414T  VAL*     3.2    23.7    +      -       +      +
    415T  CYS      3.8     5.6    -      -       -      +
    417T  PHE*     1.3    86.0    -      +       -      +
    419T  THR*     1.3    61.7    +      -       -      +
    421T  ILE*     3.5     5.0    -      -       +      +
    422T  ARG*     2.8    42.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 419 (chain T). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128S  LEU*     4.6     9.7    -      -       +      +
    130S  HIS*     4.1    12.2    -      -       +      -
    415T  CYS      2.8    16.5    +      -       -      -
    416T  ASN*     3.0    24.9    -      -       +      +
    417T  PHE      3.3     0.2    -      -       -      -
    418T  PHE*     1.3    77.9    -      -       -      +
    420T  TYR*     1.3    66.3    +      -       +      +
    422T  ARG*     2.8    28.7    +      -       -      +
    423T  TYR*     3.2    48.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 420 (chain T). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     38S  LEU*     5.6     3.1    -      -       +      -
    416T  ASN      3.1    12.9    +      -       -      +
    417T  PHE      3.8     2.9    -      -       -      +
    419T  THR*     1.3    83.3    -      -       +      +
    421T  ILE*     1.3    68.8    +      -       +      +
    423T  TYR*     3.1    26.3    +      +       +      +
    424T  ILE*     3.1    38.7    +      -       +      +
    429T  VAL*     4.3    13.4    -      -       +      +
    432T  GLN*     2.7    30.1    +      -       -      -
    437T  MET*     3.5    24.0    -      -       -      +
    440T  GLU*     3.3    43.2    -      -       +      +
    441T  VAL*     4.3     9.2    -      -       +      -
    444T  LEU*     4.3    13.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 421 (chain T). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    308T  TRP*     3.7    26.2    -      -       +      -
    314T  MET*     3.5    28.5    -      -       +      -
    320T  PHE*     3.6    30.7    -      -       +      -
    321T  LEU*     4.8     7.2    -      -       +      -
    417T  PHE*     2.9    50.9    +      -       +      +
    418T  PHE*     3.5     7.4    -      -       +      +
    420T  TYR*     1.3    79.0    -      -       +      +
    422T  ARG*     1.3    61.9    +      -       -      +
    424T  ILE*     3.2    12.5    +      -       +      +
    425T  GLN*     3.1    19.6    +      -       -      +
    441T  VAL*     5.1     6.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 422 (chain T). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    127S  ASP      5.6     2.2    +      -       -      -
    130S  HIS*     5.4     3.0    -      -       -      -
    314T  MET*     4.1    22.9    -      -       +      -
    348T  VAL      5.6     1.6    +      -       -      -
    349T  GLU      5.8     3.1    -      -       -      -
    351T  ASN*     3.6    44.6    +      -       -      +
    415T  CYS      5.0     0.8    +      -       -      -
    418T  PHE*     2.8    21.9    +      -       +      +
    419T  THR*     2.8    40.3    +      -       -      +
    421T  ILE*     1.3    76.7    -      -       -      +
    423T  TYR*     1.3    72.0    +      -       -      +
    425T  GLN*     3.0    10.7    +      -       -      +
    426T  GLN*     2.8    53.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 423 (chain T). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     38S  LEU*     4.0    27.6    -      -       +      -
    127S  ASP*     3.8     6.6    +      -       -      -
    128S  LEU*     3.8     9.8    -      -       +      +
    156S  LEU*     3.4    38.8    -      -       +      +
    200S  GNP      3.6    12.8    +      -       -      -
    419T  THR*     3.2    29.8    +      -       +      -
    420T  TYR*     3.1    23.7    +      +       +      +
    422T  ARG*     1.3    95.2    -      -       -      +
    424T  ILE*     1.3    59.1    +      -       -      +
    426T  GLN*     3.7     8.2    +      -       -      +
    427T  GLY      3.5     1.4    +      -       -      -
    428T  LEU*     2.9    43.3    +      -       +      +
    429T  VAL*     3.8    14.1    +      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 424 (chain T). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    305T  PHE*     4.4    14.8    -      -       +      -
    308T  TRP*     4.0    27.1    -      -       +      -
    309T  LYS*     4.6    14.4    -      -       +      +
    312T  PRO*     4.2    13.2    -      -       +      +
    420T  TYR*     3.1    39.9    +      -       +      +
    421T  ILE*     3.6     9.4    -      -       +      +
    422T  ARG      3.1     0.2    -      -       -      -
    423T  TYR*     1.3    75.7    -      -       -      +
    425T  GLN*     1.3    67.2    +      -       -      +
    427T  GLY*     3.1    14.0    +      -       -      -
    429T  VAL*     4.4     7.0    -      -       +      -
    437T  MET*     3.2    35.2    -      -       +      -
    441T  VAL*     5.0     1.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 425 (chain T). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    308T  TRP*     5.1     1.6    -      -       +      -
    312T  PRO*     3.7    38.5    +      -       +      +
    313T  THR*     4.9     1.6    -      -       -      +
    314T  MET*     4.7    23.0    -      -       +      +
    421T  ILE      3.1    12.1    +      -       -      +
    422T  ARG*     3.0    12.1    +      -       -      +
    424T  ILE*     1.3    78.1    -      -       -      +
    426T  GLN*     1.3    77.5    +      -       -      +
    427T  GLY      3.3     2.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 426 (chain T). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    156S  LEU*     5.5     9.1    -      -       -      +
    422T  ARG*     2.8    47.9    +      -       -      +
    423T  TYR*     4.5     9.8    -      -       -      +
    424T  ILE      3.2     0.4    -      -       -      -
    425T  GLN*     1.3    92.0    -      -       -      +
    427T  GLY*     1.3    62.4    +      -       -      +
    428T  LEU*     3.2     8.5    +      -       +      +
----------------------------------------------------------
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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