Contacts of the helix formed by residues 75 - 100 (chain A) in PDB entry 4J7Y


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 HIS 75 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     70A  ALA      3.1     2.5    +      -       -      +
     71A  GLY*     3.5     6.6    +      -       -      -
     74A  PHE*     1.3   102.7    -      +       +      +
     76A  GLU*     1.3    65.0    +      -       -      +
     77A  GLY*     3.2    23.5    +      -       -      -
     78A  ALA*     3.0    25.3    +      -       +      +
     79A  ALA*     3.3    23.0    +      -       -      +
    121A  LEU*     5.5     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 76 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      3A  ASP      4.2     5.2    -      -       -      +
      4A  GLU*     3.1    26.3    -      -       -      +
      5A  VAL      3.2    13.5    -      -       -      -
      6A  ALA      3.3     1.0    +      -       -      -
      7A  LEU*     3.0    47.5    +      -       +      +
      8A  LEU*     3.5    23.6    +      -       +      +
     71A  GLY*     3.2    16.8    +      -       -      +
     75A  HIS*     1.3    75.4    -      -       -      +
     77A  GLY*     1.3    57.9    +      -       -      +
     79A  ALA*     3.3     4.2    +      -       -      +
     80A  ALA*     2.9    27.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 77 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      7A  LEU*     4.5    12.9    -      -       -      +
     75A  HIS*     3.2    16.2    +      -       -      -
     76A  GLU*     1.3    77.2    -      -       -      +
     78A  ALA*     1.3    58.3    +      -       -      +
     80A  ALA*     3.2     7.0    +      -       -      +
     81A  LEU*     2.9    39.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 78 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     74A  PHE*     4.5     5.8    -      -       +      -
     75A  HIS*     3.0    27.5    +      -       +      +
     77A  GLY*     1.3    74.1    -      -       -      +
     79A  ALA*     1.3    56.4    +      -       -      +
     81A  LEU*     3.3    13.4    +      -       -      +
     82A  CYS*     2.9    38.4    +      -       -      -
    121A  LEU*     4.0    20.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 79 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8A  LEU*     4.2     0.9    -      -       +      -
     67A  LEU*     3.2    23.7    -      -       +      +
     70A  ALA*     4.1     3.4    -      -       +      -
     71A  GLY*     3.5    26.7    -      -       -      +
     75A  HIS      3.3    14.8    +      -       -      +
     76A  GLU      3.3     3.3    +      -       -      +
     77A  GLY      3.2     0.4    -      -       -      -
     78A  ALA*     1.3    78.0    -      -       -      +
     80A  ALA*     1.3    58.6    +      -       -      +
     82A  CYS*     3.4     3.3    +      -       -      +
     83A  GLY      2.9    24.3    +      -       -      -
    118A  LEU*     3.6    19.1    -      -       +      +
    121A  LEU*     4.7     1.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 80 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      7A  LEU*     4.1    25.4    -      -       +      +
      8A  LEU*     4.5     1.8    -      -       +      +
     11A  VAL*     3.7    27.8    -      -       +      +
     67A  LEU*     4.0     6.0    -      -       -      +
     76A  GLU      2.9    17.3    +      -       -      +
     77A  GLY*     3.6     5.6    -      -       -      +
     79A  ALA*     1.3    77.8    -      -       -      +
     81A  LEU*     1.3    56.6    +      -       +      +
     83A  GLY*     3.2     2.4    +      -       -      -
     84A  LEU*     2.9    29.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 81 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     77A  GLY*     2.9    26.4    +      -       -      +
     78A  ALA*     3.5    12.8    -      -       -      +
     79A  ALA      3.3     0.2    -      -       -      -
     80A  ALA*     1.3    72.9    -      -       +      +
     82A  CYS*     1.3    68.8    +      -       -      +
     84A  LEU*     3.0    12.5    +      -       +      +
     85A  VAL*     2.9    29.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with CYS 82 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     78A  ALA*     2.9    26.9    +      -       -      +
     79A  ALA      3.6     4.9    -      -       -      +
     81A  LEU*     1.3    77.2    -      -       -      +
     83A  GLY*     1.3    57.8    +      -       -      +
     85A  VAL*     3.4     8.5    +      -       -      +
     86A  TYR*     2.9    30.0    +      -       -      +
    114A  ALA*     3.7    10.6    -      -       +      +
    117A  LEU*     3.5    39.3    -      -       -      -
    118A  LEU*     3.7    21.3    -      -       +      -
    121A  LEU*     4.4    10.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 83 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     11A  VAL*     4.1     9.9    -      -       -      -
     63A  PHE*     3.4    28.0    -      -       -      -
     67A  LEU*     4.6     0.2    -      -       -      -
     79A  ALA      2.9    15.1    +      -       -      -
     80A  ALA      3.2     5.1    +      -       -      -
     81A  LEU      3.2     0.2    -      -       -      -
     82A  CYS*     1.3    76.5    -      -       -      +
     84A  LEU*     1.3    55.0    +      -       -      +
     86A  TYR*     3.5     1.6    +      -       -      +
     87A  LEU*     2.9    34.7    +      -       -      +
    118A  LEU*     4.3     1.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 84 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     11A  VAL*     4.3    17.7    -      -       +      -
     14A  LEU*     3.5    32.1    -      -       +      -
     80A  ALA      2.9    14.4    +      -       -      +
     81A  LEU*     3.0    15.7    +      -       +      +
     83A  GLY*     1.3    74.2    -      -       -      +
     85A  VAL*     1.3    63.1    +      -       +      +
     87A  LEU*     3.3     2.9    +      -       +      +
     88A  PHE*     2.9    32.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 85 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     81A  LEU*     2.9    18.8    +      -       +      +
     82A  CYS*     3.6     9.0    -      -       -      +
     84A  LEU*     1.3    78.4    -      -       +      +
     86A  TYR*     1.3    57.3    +      -       -      +
     88A  PHE*     3.7     7.0    -      -       +      +
     89A  ALA*     2.9    30.7    +      -       +      +
     92A  ARG*     5.2     0.2    +      -       -      -
    110A  ALA*     4.7    10.5    -      -       +      +
    114A  ALA*     4.1    14.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 86 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     56A  CYS      4.9     1.6    +      -       -      -
     59A  TYR*     3.4    28.2    +      -       -      +
     60A  PHE*     4.6     3.6    +      +       -      -
     63A  PHE*     3.4    43.1    -      +       +      -
     82A  CYS      2.9    18.5    +      -       -      +
     83A  GLY*     3.5     6.1    -      -       -      +
     85A  VAL*     1.3    77.7    -      -       -      +
     87A  LEU*     1.3    69.4    +      -       +      +
     89A  ALA*     3.3     5.8    +      -       -      +
     90A  ARG*     2.9    68.3    +      -       +      +
    111A  SER*     3.2    28.7    -      -       -      +
    114A  ALA*     3.9    10.7    -      -       +      +
    115A  LEU*     4.3    21.5    -      -       +      +
    118A  LEU*     5.5     1.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 87 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     11A  VAL*     3.6    33.0    -      -       +      +
     14A  LEU*     3.9    22.2    -      -       +      +
     15A  GLY*     3.7    27.4    -      -       -      +
     18A  LEU*     3.4    27.5    -      -       +      +
     19A  GLN*     5.9     1.1    -      -       -      +
     60A  PHE*     4.8     4.3    -      -       +      -
     63A  PHE*     3.8    18.8    -      -       +      -
     83A  GLY      2.9    20.9    +      -       -      +
     84A  LEU*     3.8     4.0    -      -       +      +
     86A  TYR*     1.3    86.9    -      -       +      +
     88A  PHE*     1.3    58.3    +      -       -      +
     90A  ARG*     3.3     2.5    +      -       +      -
     91A  LEU*     2.9    25.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 88 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     84A  LEU      2.9    17.9    +      -       -      +
     85A  VAL*     3.7     6.5    -      -       -      +
     87A  LEU*     1.3    76.3    -      -       -      +
     89A  ALA*     1.3    55.7    +      -       -      +
     91A  LEU*     3.2    19.5    +      -       +      +
     92A  ARG*     2.9    73.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 89 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     85A  VAL*     2.9    18.8    +      -       +      +
     86A  TYR      3.5     4.5    -      -       -      +
     88A  PHE*     1.3    77.0    -      -       -      +
     90A  ARG*     1.3    57.9    +      -       -      +
     92A  ARG*     3.5    13.7    +      -       -      +
     93A  TYR*     2.9    24.8    +      -       -      +
    107A  PRO*     3.2    17.7    -      -       -      +
    110A  ALA*     3.7    12.8    -      -       +      -
    111A  SER*     3.4    31.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 90 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18A  LEU*     4.7     7.2    -      -       +      -
     19A  GLN*     6.0     0.2    -      -       -      +
     22A  PHE*     3.7     6.1    -      -       +      -
     55A  ASN*     3.7     7.3    +      -       -      +
     56A  CYS*     3.4    49.1    -      -       +      +
     59A  TYR*     3.0    38.5    -      -       -      -
     86A  TYR*     2.9    52.1    +      -       +      +
     87A  LEU*     3.3     7.6    +      -       +      +
     89A  ALA*     1.3    73.0    -      -       -      +
     91A  LEU*     1.3    60.9    +      -       -      +
     93A  TYR*     3.2    20.6    -      -       -      +
     94A  PHE*     2.9    28.4    +      -       -      +
    108A  LEU*     4.3     8.7    -      -       -      +
    111A  SER*     3.4    22.5    +      -       -      -
    203A  1JP      4.1    11.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 91 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18A  LEU*     3.9    20.0    -      -       +      -
     21A  TYR*     3.6    31.2    -      -       +      -
     22A  PHE*     3.9    10.0    -      -       +      -
     87A  LEU      2.9    14.0    +      -       -      +
     88A  PHE*     3.5    24.0    -      -       +      +
     90A  ARG*     1.3    75.4    -      -       -      +
     92A  ARG*     1.3    58.3    +      -       +      +
     94A  PHE*     3.2     2.6    +      -       +      +
     95A  GLN*     3.0    56.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 92 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     85A  VAL      5.2     0.4    +      -       -      -
     88A  PHE*     2.9    67.0    +      -       +      +
     89A  ALA*     3.7    13.0    -      -       -      +
     91A  LEU*     1.3    73.0    -      -       +      +
     93A  TYR*     1.3    60.5    +      -       -      +
     95A  GLN*     3.5    16.7    +      -       -      +
     96A  GLY*     2.9    24.9    +      -       -      -
    106A  ALA      4.7     0.8    +      -       -      -
    107A  PRO*     3.4    33.3    -      -       +      +
    110A  ALA*     3.4    30.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 93 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     52A  ALA*     3.6    28.0    -      -       +      -
     55A  ASN*     3.4    13.8    +      -       +      +
     56A  CYS*     3.7    19.7    -      -       -      -
     89A  ALA      2.9    15.6    +      -       -      +
     90A  ARG*     3.2    21.5    -      -       -      +
     92A  ARG*     1.3    75.8    -      -       -      +
     94A  PHE*     1.3    59.9    +      -       -      +
     96A  GLY      3.4     0.2    +      -       -      -
     97A  TYR*     2.9    46.2    +      +       -      +
    104A  ARG*     3.5    33.1    -      -       +      +
    107A  PRO*     3.2    13.3    -      -       +      +
    108A  LEU*     3.6    22.7    -      -       +      +
    203A  1JP      2.7    40.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 94 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     21A  TYR*     4.5     8.1    -      +       -      -
     22A  PHE*     3.4    50.7    -      +       +      -
     25A  GLN*     3.4    44.0    -      -       +      -
     49A  VAL*     3.7    34.5    -      -       +      -
     52A  ALA*     3.6    18.7    -      -       +      +
     53A  GLN*     3.8    19.1    -      -       +      -
     56A  CYS*     4.9     0.2    -      -       -      -
     90A  ARG      2.9     8.3    +      -       -      +
     91A  LEU      3.2     4.0    +      -       -      +
     93A  TYR*     1.3    81.3    -      -       +      +
     95A  GLN*     1.3    64.3    +      -       +      +
     97A  TYR*     3.4     1.6    +      -       -      +
     98A  ALA*     2.9    37.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 95 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     21A  TYR*     4.7    10.8    +      -       -      +
     91A  LEU*     3.0    42.6    +      -       +      +
     92A  ARG*     3.7    20.7    -      -       -      +
     94A  PHE*     1.3    84.4    -      -       +      +
     96A  GLY*     1.3    62.4    +      -       -      +
     98A  ALA*     3.6     5.6    +      -       -      +
     99A  ARG*     3.5    27.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 96 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     92A  ARG      2.9    17.2    +      -       -      -
     93A  TYR      3.7     0.2    -      -       -      -
     95A  GLN*     1.3    71.0    -      -       -      +
     97A  TYR*     1.3    65.1    +      -       -      +
     99A  ARG*     2.9    17.9    +      -       -      +
    100A  SER      2.9    18.0    +      -       -      +
    103A  LEU*     3.5    31.1    -      -       -      +
    104A  ARG      3.7     2.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 97 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48A  ARG*     3.4    41.4    +      -       +      +
     51A  ARG*     3.1    37.8    -      -       +      +
     52A  ALA*     3.3    31.4    -      -       +      -
     55A  ASN*     5.2     0.9    -      -       -      -
     93A  TYR*     2.9    36.4    +      +       -      +
     94A  PHE      3.8     0.2    -      -       -      +
     96A  GLY*     1.3    71.3    -      -       -      +
     98A  ALA*     1.3    62.8    +      -       -      +
     99A  ARG      3.1     0.9    +      -       -      -
    100A  SER      3.3    12.6    +      -       -      -
    101A  ALA*     4.0    15.8    -      -       +      +
    104A  ARG*     3.3    38.4    +      -       +      +
    203A  1JP      5.1     0.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 98 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45A  GLU*     4.4     4.9    -      -       -      +
     48A  ARG*     3.6    13.6    +      -       -      -
     49A  VAL*     3.5    36.3    -      -       +      +
     94A  PHE*     2.9    27.4    +      -       +      +
     95A  GLN*     3.7     8.3    -      -       -      +
     96A  GLY      3.2     0.2    -      -       -      -
     97A  TYR*     1.3    75.5    -      -       -      +
     99A  ARG*     1.3    61.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 99 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48A  ARG*     3.3    15.4    +      -       -      -
     95A  GLN*     3.6    16.1    -      -       -      +
     96A  GLY*     2.9     9.0    +      -       -      +
     98A  ALA*     1.3    82.3    -      -       +      +
    100A  SER*     1.3    61.7    +      -       -      +
    103A  LEU*     3.5    33.8    -      -       +      +
    202A  SO4      4.0     3.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 100 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48A  ARG*     3.8     2.2    -      -       -      +
     96A  GLY      2.9    14.7    +      -       -      +
     97A  TYR*     3.3    10.6    +      -       -      -
     99A  ARG*     1.3    80.7    -      -       -      +
    101A  ALA*     1.3    64.4    -      -       -      +
    102A  GLN*     4.0     2.8    +      -       -      +
    103A  LEU*     3.0    38.6    +      -       -      +
    202A  SO4      3.2    29.4    -      -       -      -
----------------------------------------------------------
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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