Contacts of the helix formed by residues 483 - 506 (chain C) in PDB entry 1JIQ


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 483 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48C  HIS*     4.7     6.8    +      -       -      +
    171C  LEU*     3.8     4.0    -      -       -      +
    174C  TYR*     3.6    16.4    -      -       +      +
    481C  LYS*     3.0    28.3    +      -       +      +
    482C  LEU*     1.3    75.8    -      -       -      +
    484C  PRO*     1.3    76.8    -      -       -      +
    485C  PHE*     3.6     8.4    +      -       -      +
    486C  MET*     3.2    22.1    +      -       -      +
    487C  LEU*     2.9    22.5    +      -       -      +
    557D  VAL*     4.4    14.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with PRO 484 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    171C  LEU*     3.8    28.7    -      -       +      -
    174C  TYR*     3.7    27.1    -      -       +      -
    292C  ASN*     3.6    48.9    -      -       +      +
    295C  GLN*     4.0     7.2    -      -       +      -
    296C  LEU*     3.4    16.1    -      -       -      +
    483C  THR*     1.3    90.2    -      -       -      +
    485C  PHE*     1.3    62.8    +      -       -      +
    487C  LEU      3.5     0.2    +      -       -      -
    488C  GLY      3.1    17.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 485 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46C  THR*     3.5    31.9    -      -       +      -
     48C  HIS*     3.5    42.6    -      +       +      -
    295C  GLN*     3.3    40.8    +      -       +      +
    298C  SER*     3.6    13.0    -      -       -      -
    299C  GLY*     3.2    33.4    -      -       -      -
    302C  TRP*     3.7    26.9    -      +       +      -
    483C  THR*     3.2     7.5    +      -       -      +
    484C  PRO*     1.3    79.6    -      -       -      +
    486C  MET*     1.3    69.7    +      -       +      +
    488C  GLY      3.1     2.4    +      -       -      -
    489C  ALA*     3.0    21.1    +      -       +      -
----------------------------------------------------------
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Residues in contact with MET 486 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46C  THR*     4.5     5.4    -      -       +      +
     48C  HIS      4.3     5.4    -      -       -      +
     49C  GLY*     3.9    25.4    -      -       -      +
     50C  HIS      3.8    14.1    -      -       -      +
     51C  ILE*     3.6    40.6    -      -       +      -
    479C  PHE*     3.8    25.4    -      -       +      -
    480C  THR*     4.6     2.9    -      -       -      +
    481C  LYS      3.3    26.5    -      -       -      +
    482C  LEU*     4.6     0.9    -      -       +      -
    483C  THR*     3.2    11.9    +      -       -      +
    485C  PHE*     1.3    80.1    -      -       +      +
    487C  LEU*     1.3    67.7    +      -       -      +
    489C  ALA*     3.1     6.4    +      -       -      +
    490C  LEU*     2.9    33.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 487 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    166C  MET*     4.4     4.3    -      -       -      -
    167C  VAL*     3.9    23.3    -      -       +      -
    170C  ALA*     3.7    24.0    -      -       +      -
    171C  LEU*     3.8    20.9    -      -       +      -
    296C  LEU*     4.2     5.2    -      -       +      -
    345C  LEU*     4.2    23.1    -      -       +      -
    348C  PHE*     4.3     8.7    -      -       +      -
    482C  LEU*     3.9    16.0    -      -       +      +
    483C  THR      2.9    16.7    +      -       -      +
    484C  PRO      3.8     4.5    -      -       -      +
    486C  MET*     1.3    75.9    -      -       -      +
    488C  GLY*     1.3    62.1    +      -       -      +
    490C  LEU*     3.3     4.3    +      -       +      +
    491C  VAL*     3.0    46.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 488 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    277C  TRP*     3.7     8.1    -      -       -      -
    296C  LEU*     3.5    33.6    -      -       -      +
    300C  ALA*     3.4    16.8    -      -       -      +
    484C  PRO      3.1    11.3    +      -       -      -
    485C  PHE      3.1     1.7    +      -       -      -
    487C  LEU*     1.3    75.6    -      -       -      +
    489C  ALA*     1.3    62.2    +      -       -      +
    492C  ALA*     3.1    18.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 489 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46C  THR*     5.3     0.4    -      -       +      -
     51C  ILE*     4.4    12.3    -      -       +      -
    299C  GLY*     3.3    21.8    -      -       -      +
    302C  TRP*     4.9     6.3    -      -       +      -
    303C  MET*     3.5    24.9    -      -       +      +
    485C  PHE*     3.0    17.0    +      -       +      +
    486C  MET*     3.1    11.6    +      -       -      +
    488C  GLY*     1.3    77.2    -      -       -      +
    490C  LEU*     1.3    57.6    +      -       -      +
    492C  ALA      3.5     0.2    +      -       -      -
    493C  MET*     2.9    28.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 490 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     51C  ILE*     4.5    16.2    -      -       +      -
    345C  LEU*     5.6     2.9    -      -       +      -
    348C  PHE*     4.7    15.3    -      -       +      -
    407C  LEU*     5.0     7.2    -      -       +      -
    477C  ILE*     4.3     9.4    -      -       +      -
    479C  PHE*     3.7    45.5    -      -       +      -
    482C  LEU*     3.9    18.4    -      -       +      -
    486C  MET*     2.9    24.6    +      -       +      +
    487C  LEU*     3.3     6.3    +      -       +      +
    489C  ALA*     1.3    73.7    -      -       -      +
    491C  VAL*     1.3    66.5    +      -       -      +
    493C  MET*     3.2    31.7    +      -       +      +
    494C  TYR*     3.3    19.9    +      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 491 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    166C  MET*     3.9    16.4    -      -       +      -
    167C  VAL*     5.5     1.6    -      -       +      -
    276C  LEU*     4.6     4.7    -      -       +      -
    277C  TRP*     3.5    28.9    -      -       +      -
    296C  LEU*     5.8     0.7    -      -       +      -
    348C  PHE*     4.2     7.0    -      -       +      -
    351C  TYR*     4.0    16.8    -      -       +      +
    352C  PHE*     3.6    22.0    -      -       +      -
    487C  LEU*     3.0    42.9    +      -       +      +
    488C  GLY*     5.0     0.2    -      -       -      -
    490C  LEU*     1.3    74.4    -      -       -      +
    492C  ALA*     1.3    64.0    +      -       -      +
    494C  TYR*     3.1     4.9    +      -       -      -
    495C  GLU*     2.9    25.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 492 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    104C  ARG*     3.7    20.6    -      -       -      +
    277C  TRP*     4.4     0.8    -      -       -      -
    300C  ALA*     3.7    24.5    -      -       +      +
    303C  MET*     3.9     8.1    -      -       +      -
    304C  ASP*     4.2     2.0    -      -       -      +
    488C  GLY      3.1    17.1    +      -       -      +
    489C  ALA      3.9     3.1    -      -       -      +
    491C  VAL*     1.3    78.8    -      -       -      +
    493C  MET*     1.3    61.0    +      -       -      +
    495C  GLU*     3.2    12.8    +      -       -      +
    496C  HIS*     3.0    28.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with MET 493 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     44C  LEU*     5.8     0.2    -      -       -      -
     51C  ILE*     5.3     2.7    -      -       -      -
     53C  VAL*     4.4     9.2    -      -       -      -
    303C  MET*     3.6    29.3    -      -       +      +
    316C  ALA*     4.1    16.8    -      -       -      -
    317C  PRO*     3.4    18.5    -      -       -      +
    320C  LEU*     3.8    31.6    -      -       +      -
    477C  ILE*     4.1    16.4    -      -       +      -
    489C  ALA      2.9    14.7    +      -       -      +
    490C  LEU*     3.4    26.5    -      -       +      +
    491C  VAL      3.2     0.2    -      -       -      -
    492C  ALA*     1.3    76.5    -      -       -      +
    494C  TYR*     1.3    79.6    +      -       +      +
    496C  HIS      3.3     0.3    +      -       -      -
    497C  LYS*     2.9    25.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 494 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    320C  LEU*     4.7     6.1    -      -       +      -
    338C  MET*     3.6    29.6    -      -       +      +
    348C  PHE*     4.1    20.9    -      +       -      -
    352C  PHE*     3.3    27.8    -      +       +      -
    405C  ASP*     2.7    38.8    +      -       -      +
    407C  LEU*     4.1    10.0    -      -       +      +
    477C  ILE*     3.5    15.2    -      -       +      +
    490C  LEU*     3.3    18.8    +      -       +      -
    491C  VAL      3.1     2.2    +      -       -      +
    493C  MET*     1.3    97.0    -      -       +      +
    495C  GLU*     1.3    64.2    +      -       -      +
    497C  LYS*     3.2    29.5    +      -       +      +
    498C  ILE*     3.0    32.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 495 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    100C  HIS*     3.6     8.0    +      -       -      +
    104C  ARG*     2.8    36.4    +      -       -      -
    273C  ARG      5.7     0.2    -      -       -      +
    274C  TYR*     3.6    45.3    +      -       +      -
    277C  TRP*     2.9    30.3    +      -       -      -
    351C  TYR*     4.3     5.5    +      -       +      +
    352C  PHE*     4.4     6.5    -      -       +      -
    491C  VAL*     2.9    22.0    +      -       +      +
    492C  ALA*     3.2     9.0    +      -       -      +
    494C  TYR*     1.3    75.6    -      -       -      +
    496C  HIS*     1.3    67.3    +      -       -      +
    498C  ILE*     3.3     8.9    +      -       +      +
    499C  PHE*     3.1    21.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 496 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     84C  MET*     3.8    22.1    -      -       +      +
    100C  HIS*     4.7     6.0    +      -       -      -
    101C  VAL*     4.1     7.6    -      -       +      -
    104C  ARG*     3.8    11.5    +      -       -      -
    303C  MET*     4.5     4.7    -      -       +      -
    304C  ASP*     2.7    34.9    +      -       -      -
    307C  PHE*     3.3    47.6    -      +       +      -
    317C  PRO*     3.5    20.6    -      -       +      -
    492C  ALA      3.0    22.4    +      -       -      +
    495C  GLU*     1.3    77.4    -      -       +      +
    497C  LYS*     1.3    64.1    +      -       -      +
    499C  PHE*     3.2     5.4    +      -       -      +
    500C  VAL*     3.0    27.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 497 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    317C  PRO*     3.5    17.8    -      -       +      +
    320C  LEU*     4.0    24.7    +      -       +      +
    321C  ALA*     3.5    21.5    -      -       -      +
    324C  GLY*     5.4     1.8    -      -       -      -
    336C  HIS*     3.2    42.4    +      -       -      -
    356C  ASP*     4.6     9.8    +      -       -      +
    377C  PRO*     6.0     1.6    -      -       -      +
    405C  ASP*     4.4     3.0    +      -       -      -
    493C  MET      2.9    14.4    +      -       -      +
    494C  TYR*     3.4    29.9    -      -       +      +
    496C  HIS*     1.3    77.2    -      -       -      +
    498C  ILE*     1.3    66.4    +      -       +      +
    500C  VAL      3.3     0.3    +      -       -      -
    501C  GLN*     3.1    46.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 498 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    274C  TYR*     3.7    12.6    -      -       +      +
    352C  PHE*     3.9    19.5    -      -       +      -
    355C  GLY      3.8     5.6    -      -       -      +
    356C  ASP*     3.5    47.6    -      -       +      +
    359C  SER*     3.6    26.9    -      -       -      -
    360C  ASN*     2.9    33.0    -      -       -      +
    494C  TYR*     3.0    22.2    +      -       +      +
    495C  GLU*     3.6     8.1    -      -       -      +
    497C  LYS*     1.3    80.2    -      -       +      +
    499C  PHE*     1.3    63.4    +      -       -      +
    501C  GLN*     3.4     5.1    +      -       -      +
    502C  GLY      3.1    10.2    +      -       -      -
    509C  SER*     3.8     4.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 499 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     77C  VAL*     4.8     2.9    -      -       +      -
     80C  ALA*     3.6    26.0    -      -       +      -
     81C  ARG*     3.7    21.5    -      -       +      -
     84C  MET*     4.1    18.2    -      -       +      -
     90C  ILE*     4.0    21.8    -      -       +      -
    100C  HIS*     6.3     0.9    -      -       -      +
    274C  TYR*     5.4     0.2    +      -       -      -
    307C  PHE*     3.7    28.9    -      +       -      -
    495C  GLU      3.1    14.1    +      -       -      +
    496C  HIS*     3.5    11.2    -      -       -      +
    498C  ILE*     1.3    76.0    -      -       -      +
    500C  VAL*     1.3    67.2    +      -       +      +
    502C  GLY*     3.2     2.4    +      -       -      -
    503C  ILE*     3.1    53.0    +      -       +      +
    509C  SER*     4.5     5.7    +      -       -      -
    510C  PHE*     3.6    29.4    -      +       +      -
----------------------------------------------------------
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Residues in contact with VAL 500 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     77C  VAL*     4.0    26.5    -      -       +      -
    307C  PHE*     3.8    28.9    -      -       +      -
    318C  VAL*     4.2    26.5    -      -       +      +
    321C  ALA*     3.5    25.4    -      -       +      -
    322C  LEU*     5.3     0.7    -      -       +      +
    496C  HIS      3.0    21.1    +      -       -      +
    497C  LYS      3.3     0.2    +      -       -      -
    499C  PHE*     1.3    76.4    -      -       +      +
    501C  GLN*     1.3    64.3    +      -       -      +
    503C  ILE*     3.2     8.1    +      -       -      +
    504C  ILE*     3.0    32.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 501 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    321C  ALA*     3.0    36.4    +      -       +      +
    324C  GLY*     3.5    22.2    -      -       -      -
    325C  ILE*     3.9    11.6    -      -       +      +
    328C  ILE*     4.7     3.4    -      -       -      +
    356C  ASP*     4.6    10.0    -      -       -      +
    360C  ASN*     3.9     4.3    -      -       -      +
    377C  PRO*     4.8     4.2    -      -       -      +
    497C  LYS*     3.1    40.7    +      -       -      +
    498C  ILE*     3.8     7.5    -      -       -      +
    499C  PHE      3.2     0.4    -      -       -      -
    500C  VAL*     1.3    77.8    -      -       -      +
    502C  GLY*     1.3    61.2    +      -       -      +
    504C  ILE*     3.2     3.6    +      -       -      +
    505C  TRP*     3.0    55.8    +      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 502 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    360C  ASN*     3.8     2.1    +      -       -      -
    498C  ILE      3.1    11.5    +      -       -      -
    499C  PHE      3.2     1.3    +      -       -      -
    501C  GLN*     1.3    75.8    -      -       -      +
    503C  ILE*     1.3    53.7    +      -       -      +
    505C  TRP*     3.2     1.5    +      -       -      -
    506C  ASP      2.8    30.1    +      -       -      -
    507C  ILE*     3.0    32.7    +      -       -      +
    509C  SER*     3.5    22.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 503 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     75C  ARG*     3.0    35.6    +      -       -      +
     77C  VAL*     4.1    17.0    -      -       +      -
     80C  ALA*     3.6    35.2    -      -       +      -
     83C  ARG*     5.5     2.0    -      -       -      +
     90C  ILE*     6.0     0.9    -      -       +      -
    499C  PHE*     3.1    39.2    +      -       +      +
    500C  VAL*     3.2     9.6    +      -       -      +
    502C  GLY*     1.3    77.4    -      -       -      +
    504C  ILE*     1.3    62.4    +      -       -      +
    506C  ASP*     3.0    12.2    +      -       -      +
    507C  ILE      5.2     4.0    -      -       -      +
    510C  PHE*     6.1     0.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 504 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      4C  LEU*     3.7    29.5    -      -       +      +
     71C  LEU*     4.2    12.8    -      -       +      -
     72C  ALA*     4.4     5.2    -      -       -      -
     75C  ARG*     2.8    37.3    +      -       +      +
     77C  VAL*     4.1    17.9    -      -       +      -
    322C  LEU*     3.6    31.2    -      -       +      -
    325C  ILE*     3.8    29.4    -      -       +      -
    500C  VAL*     3.0    25.7    +      -       +      +
    501C  GLN      3.6     6.7    -      -       -      +
    503C  ILE*     1.3    74.1    -      -       -      +
    505C  TRP*     1.3    61.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with TRP 505 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      2C  ALA*     5.7     0.2    -      -       -      +
      4C  LEU*     3.7    10.6    +      -       +      +
    325C  ILE*     3.4    21.3    -      -       +      +
    328C  ILE*     3.8    22.4    -      -       +      -
    329C  ASN*     2.8    25.6    +      -       -      -
    360C  ASN*     3.8    16.8    -      -       +      -
    365C  THR*     4.1     4.7    -      -       -      +
    373C  HIS*     3.7    30.9    +      +       +      -
    374C  GLN      3.4    14.3    +      -       -      -
    375C  THR*     3.6    31.6    -      -       +      -
    376C  GLY*     3.6    22.4    -      -       -      -
    377C  PRO*     4.4     0.2    -      -       +      -
    501C  GLN*     3.0    49.5    +      -       +      +
    502C  GLY*     3.8     7.0    -      -       -      +
    504C  ILE*     1.3    74.8    -      -       -      +
    506C  ASP*     1.3    68.7    +      -       -      +
    507C  ILE*     3.4    18.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 506 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      3C  ALA*     3.5    23.3    -      -       +      +
     75C  ARG*     3.3    21.6    +      -       -      +
     92C  TYR*     3.6     2.6    +      -       -      -
    365C  THR*     3.2    13.7    +      -       +      -
    366C  LYS*     3.0    51.6    +      -       -      +
    367C  SER*     4.5     4.3    +      -       -      -
    502C  GLY      2.8     9.0    +      -       -      -
    503C  ILE*     3.0     9.5    +      -       -      +
    505C  TRP*     1.3    80.9    -      -       -      +
    507C  ILE*     1.3    58.1    +      -       -      +
----------------------------------------------------------
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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