Contacts of the helix formed by residues 83 - 108 (chain A) in PDB entry 3VG9


Residue contacts within the protein are derived with the CSU software (Sobolev V., Sorokine A., Prilusky J., Abola E.E. and Edelman M. (1999) Automated analysis of interatomic contacts in proteins. Bioinformatics, 15, 327-332). A short description of the analytical approach is given at the end of the page.
For CSU analysis of other PDB entry

Note:
Non-standard 3 letter residue codes indicate a heterogroup. To identify and analyse, use LPC software

Legend:
Dist - nearest distance (Å) between atoms of two residues
Surf - contact surface area (Å2) between two residues
HB   - hydrophilic-hydrophilic contact (hydrogen bond)
Arom - aromatic-aromatic contact
Phob - hydrophobic-hydrophobic contact
DC   - hydrophobic-hydrophilic contact (destabilizing contact)
+/-  - indicates presence/absence of a specific contacts
*    - indicates residues forming contacts  by their side chain
       (including CA atoms)
Residues in contact with PHE 83 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     54A  ALA*     4.9     3.1    -      -       +      -
     58A  LEU*     3.3    41.5    -      -       +      -
     59A  ALA*     4.8     4.3    -      -       -      -
     62A  PHE*     4.2    19.1    -      +       +      -
     79A  PHE*     3.3    39.2    +      +       +      +
     80A  ILE      4.7     0.8    +      -       -      +
     81A  ALA      3.9     2.8    +      -       -      -
     82A  CYS*     1.3    74.5    -      -       -      +
     84A  VAL*     1.3    59.5    +      -       +      +
     85A  LEU      2.7    14.4    +      -       -      +
     86A  VAL*     2.8    46.5    +      -       +      +
     87A  LEU*     3.5    29.3    +      -       +      +
    133A  PHE*     4.3    17.9    -      +       -      -
    137A  LEU*     5.4     3.6    -      -       +      -
    406A  STE      5.9     5.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 84 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     55A  VAL*     4.9     5.4    -      -       +      -
     59A  ALA*     3.2    40.4    -      -       +      +
     62A  PHE*     5.8     2.5    -      -       +      -
     80A  ILE      5.9     1.1    -      -       -      +
     81A  ALA      5.5     6.1    -      -       -      +
     83A  PHE*     1.3    77.0    -      -       +      +
     85A  LEU*     1.3    68.9    +      -       +      +
     86A  VAL      3.5     0.2    -      -       -      -
     87A  LEU*     3.6    13.8    -      -       -      +
     88A  THR*     2.8    38.2    +      -       -      +
    246A  TRP*     4.2    22.0    -      -       +      -
    274A  ILE*     6.0     3.1    -      -       +      -
    278A  HIS*     4.7    13.0    -      -       +      +
    401A  ZMA      4.6     5.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 85 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     82A  CYS*     3.8    27.4    -      -       +      -
     83A  PHE      2.7     2.6    +      -       -      +
     84A  VAL*     1.3    85.7    -      -       +      +
     86A  VAL*     1.3    56.8    +      -       -      +
     88A  THR*     3.6     4.6    -      -       -      -
     89A  GLN*     3.0    28.2    +      -       -      +
    135A  ILE      5.4     1.3    -      -       -      +
    136A  GLY*     3.1    26.2    -      -       -      +
    168A  PHE*     4.9     3.6    -      -       +      -
    177A  MET*     4.1    18.8    -      -       +      -
    181A  ASN*     3.7    31.0    -      -       -      +
    401A  ZMA      3.3    39.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 86 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     83A  PHE*     2.8    40.6    +      -       +      +
     85A  LEU*     1.3    72.3    -      -       -      +
     87A  LEU*     1.3    69.1    +      -       +      +
     89A  GLN*     3.3     3.1    +      -       -      +
     90A  SER*     2.9    21.8    +      -       -      -
    129A  TRP*     5.0     4.0    -      -       +      -
    132A  SER*     3.0    33.3    -      -       -      +
    133A  PHE*     3.0    44.9    -      -       +      -
    136A  GLY*     3.7    11.6    -      -       -      -
    137A  LEU*     5.1     6.5    -      -       +      +
----------------------------------------------------------
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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
----------------------------------------------------------
     51A  ALA*     3.5    13.4    -      -       -      +
     54A  ALA*     3.4    20.4    -      -       +      -
     55A  VAL*     3.3    50.0    -      -       +      +
     59A  ALA*     4.6     1.6    -      -       +      -
     83A  PHE*     3.5    31.6    +      -       +      +
     84A  VAL*     3.6    12.3    -      -       -      +
     85A  LEU      3.3     0.2    -      -       -      -
     86A  VAL*     1.3    81.7    -      -       +      +
     88A  THR*     1.3    64.8    +      -       -      +
     90A  SER*     2.9     7.6    +      -       -      -
     91A  SER*     2.9    26.1    +      -       -      -
    129A  TRP*     4.3    21.3    -      -       +      -
    133A  PHE*     5.8     0.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 88 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     84A  VAL*     2.8    23.9    +      -       -      +
     85A  LEU*     3.6     6.1    -      -       -      -
     87A  LEU*     1.3    71.0    -      -       -      +
     89A  GLN*     1.3    64.9    +      -       -      +
     91A  SER*     3.1    11.8    +      -       -      -
     92A  ILE*     3.0    28.6    +      -       +      +
    181A  ASN*     6.4     0.2    -      -       -      +
    186A  VAL*     5.1     6.5    -      -       +      -
    242A  PHE*     3.5    24.5    -      -       +      -
    246A  TRP*     3.0    45.1    -      -       +      +
    250A  HIS*     6.0     1.8    -      -       +      -
    280A  ASN*     6.1     0.7    -      -       -      +
    401A  ZMA      5.3     3.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 89 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     85A  LEU      3.0    17.3    +      -       -      +
     86A  VAL*     3.5     9.2    -      -       -      +
     88A  THR*     1.3    77.8    -      -       -      +
     90A  SER*     1.3    58.6    +      -       -      +
     92A  ILE*     3.2    12.5    +      -       -      +
     93A  PHE*     2.9    62.6    +      -       +      -
    132A  SER*     3.8     7.9    -      -       -      +
    135A  ILE*     4.4    15.4    -      -       +      +
    136A  GLY*     5.1     2.5    -      -       -      -
    181A  ASN*     4.7     6.6    -      -       -      +
    185A  CYS*     2.8    53.6    +      -       -      +
    186A  VAL*     4.2     9.0    -      -       -      +
    189A  PRO*     5.2     0.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 90 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     47A  SER*     4.4     3.8    +      -       -      -
     48A  LEU*     4.9     0.4    -      -       -      -
     51A  ALA*     4.5     3.5    -      -       -      +
     86A  VAL      2.9    10.3    +      -       -      -
     87A  LEU*     2.9     8.6    +      -       -      -
     89A  GLN*     1.3    72.9    -      -       -      +
     91A  SER*     1.3    66.4    +      -       -      +
     93A  PHE*     3.2     5.4    +      -       -      +
     94A  SER*     2.9    27.1    +      -       -      -
    128A  CYS*     4.6     3.3    +      -       -      +
    129A  TRP*     3.4    47.4    +      -       -      -
    132A  SER*     3.1    19.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 91 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48A  LEU*     3.3    20.3    -      -       -      +
     51A  ALA*     4.3     7.8    +      -       -      +
     52A  ASP*     3.6    20.4    +      -       -      -
     87A  LEU      2.9    16.9    +      -       -      -
     88A  THR*     3.2    11.5    -      -       -      -
     90A  SER*     1.3    76.3    -      -       -      +
     92A  ILE*     1.3    57.5    -      -       -      -
     95A  LEU*     2.9    35.4    +      -       -      +
    242A  PHE*     3.6    21.0    -      -       -      -
    280A  ASN*     4.9     2.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 92 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     88A  THR*     3.0    18.3    +      -       +      +
     89A  GLN*     3.2    14.1    +      -       -      +
     91A  SER*     1.3    76.8    -      -       -      +
     93A  PHE*     1.3    70.0    +      -       +      +
     95A  LEU*     3.1    10.7    +      -       +      +
     96A  LEU*     2.9    23.9    +      -       +      +
    185A  CYS      4.2     5.6    -      -       -      +
    186A  VAL*     3.5    35.4    -      -       +      +
    189A  PRO*     3.8    33.9    -      -       +      -
    190A  LEU*     5.2     7.9    -      -       +      +
    193A  MET*     4.5     4.1    -      -       +      +
    242A  PHE*     3.3    39.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 93 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     89A  GLN*     2.9    50.6    +      -       +      -
     90A  SER*     3.6     7.0    -      -       -      +
     92A  ILE*     1.3    79.7    -      -       +      +
     94A  SER*     1.3    58.5    +      -       -      +
     96A  LEU*     3.4    16.5    +      -       +      +
     97A  ALA*     2.9    27.1    +      -       -      +
    128A  CYS*     3.2    44.5    -      -       +      -
    131A  LEU*     4.4    18.2    -      -       +      -
    132A  SER*     3.3    26.0    -      -       -      -
    135A  ILE*     4.4    13.2    -      -       +      -
    185A  CYS*     6.0     0.2    -      -       -      -
    189A  PRO*     6.4     1.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 94 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     44A  PHE*     3.8    18.4    -      -       -      -
     47A  SER*     2.8    29.1    +      -       -      -
     48A  LEU*     3.3    26.0    -      -       -      +
     90A  SER*     2.9    13.2    +      -       -      -
     93A  PHE*     1.3    74.7    -      -       -      +
     95A  LEU*     1.3    65.7    -      -       -      +
     97A  ALA*     2.9     9.4    +      -       -      +
     98A  ILE*     2.9    27.9    +      -       -      +
    125A  ILE*     6.0     0.2    -      -       -      +
    128A  CYS*     6.0     1.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 95 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48A  LEU*     3.7    24.4    -      -       +      +
     91A  SER*     2.9    25.4    +      -       -      +
     92A  ILE*     3.4    11.4    -      -       +      +
     94A  SER*     1.3    75.0    -      -       -      +
     96A  LEU*     1.3    57.3    +      -       -      +
     98A  ILE*     3.3    12.4    +      -       +      +
     99A  ALA*     2.9    27.5    +      -       -      +
    193A  MET*     3.7    18.4    -      -       +      +
    197A  TYR*     4.7     1.4    +      -       -      -
    235A  LEU      5.1     1.6    -      -       -      +
    238A  ILE*     3.7    21.8    -      -       +      -
    239A  VAL*     3.9    21.5    -      -       +      +
    242A  PHE*     3.8    40.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 96 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     92A  ILE*     2.9    18.2    +      -       +      +
     93A  PHE*     3.6    16.8    -      -       +      +
     95A  LEU*     1.3    74.9    -      -       -      +
     97A  ALA*     1.3    65.0    +      -       -      +
     99A  ALA*     3.2     3.4    +      -       +      +
    100A  ILE*     2.9    48.0    +      -       +      +
    189A  PRO*     4.0    12.6    -      -       +      +
    192A  LEU*     3.2    36.1    -      -       +      -
    193A  MET*     3.5    26.2    -      -       +      -
    196A  VAL*     5.6     1.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 97 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     44A  PHE*     3.7    38.2    -      -       +      -
     93A  PHE      2.9    14.1    +      -       -      +
     94A  SER*     2.9     9.8    +      -       -      +
     96A  LEU*     1.3    76.4    -      -       -      +
     98A  ILE*     1.3    58.2    +      -       -      +
    100A  ILE*     3.5     8.6    +      -       -      +
    101A  ASP*     2.9    27.9    +      -       -      +
    124A  ILE*     5.2     8.7    -      -       +      -
    128A  CYS*     6.1     1.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 98 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41A  THR*     4.1     9.4    -      -       +      +
     44A  PHE*     3.5    23.1    -      -       +      +
     45A  VAL*     3.6    38.1    -      -       +      +
     48A  LEU*     4.8    11.7    -      -       +      -
     94A  SER      2.9    14.9    +      -       -      +
     95A  LEU*     3.4    12.3    -      -       +      +
     97A  ALA*     1.3    74.5    -      -       -      +
     99A  ALA*     1.3    66.2    +      -       -      +
    101A  ASP*     3.1     6.8    +      -       -      +
    102A  ARG*     2.9    25.3    +      -       +      +
    197A  TYR*     3.8     9.4    -      -       -      +
    235A  LEU*     3.8    34.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 99 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     95A  LEU      2.9    12.8    +      -       -      +
     96A  LEU*     3.6     8.3    -      -       +      +
     98A  ILE*     1.3    76.0    -      -       -      +
    100A  ILE*     1.3    58.5    +      -       -      +
    102A  ARG*     3.5     2.6    +      -       -      +
    103A  TYR*     2.9    27.4    +      -       -      +
    193A  MET*     3.7     9.6    -      -       +      -
    196A  VAL*     3.7    25.2    -      -       +      +
    197A  TYR*     3.5    36.6    -      -       +      -
    200A  ILE*     4.1     1.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 100 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     96A  LEU*     2.9    43.0    +      -       +      +
     97A  ALA*     3.7     7.2    -      -       -      +
     99A  ALA*     1.3    75.2    -      -       +      +
    101A  ASP*     1.3    60.9    +      -       -      +
    103A  TYR*     3.0     7.7    +      -       +      +
    104A  ILE*     2.8    52.0    +      -       +      +
    196A  VAL*     4.9     5.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 101 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     40A  VAL*     4.5     2.5    -      -       +      +
     41A  THR*     2.6    35.2    +      -       -      +
     44A  PHE*     4.7     9.2    -      -       +      -
     97A  ALA      2.9    18.8    +      -       -      +
     98A  ILE*     3.1     6.9    +      -       -      +
    100A  ILE*     1.3    77.5    -      -       -      +
    102A  ARG*     1.3    73.6    +      -       -      +
    104A  ILE*     3.4     4.6    +      -       -      -
    105A  ALA*     2.9    27.9    +      -       -      +
    112A  TYR*     2.5    34.2    +      -       -      -
    116A  VAL*     3.8    15.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 102 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41A  THR*     3.5    11.9    +      -       -      +
     98A  ILE*     2.9    21.9    +      -       +      +
     99A  ALA      3.7     4.7    -      -       -      +
    101A  ASP*     1.3    99.5    +      -       -      +
    103A  TYR*     1.3    57.6    +      -       -      +
    105A  ALA*     3.3    34.2    -      -       -      +
    106A  ILE*     2.9    54.1    +      -       +      +
    112A  TYR*     3.6    10.7    +      -       -      -
    197A  TYR*     4.5     8.5    -      -       +      +
    200A  ILE*     3.9     9.6    -      -       +      -
    228A  GLU*     4.7     6.2    +      -       -      +
    232A  ALA*     4.6    11.7    -      -       +      +
    235A  LEU*     3.7    29.6    -      -       +      -
    103C  TYR*     3.4    41.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 103 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99A  ALA      2.9    15.1    +      -       -      +
    100A  ILE*     3.0    12.1    +      -       +      +
    102A  ARG*     1.3    73.8    -      -       -      +
    104A  ILE*     1.3    71.5    +      -       +      +
    107A  ARG*     2.9    67.7    +      -       +      +
    108A  ILE*     5.2     9.0    -      -       +      -
    196A  VAL*     3.5    26.7    -      -       +      -
    199A  ARG*     3.0    45.0    +      -       +      -
    200A  ILE*     3.5    19.1    -      -       +      -
    402A  STE      3.2    22.7    +      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 104 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    100A  ILE*     2.8    51.7    +      -       +      +
    101A  ASP*     3.8     6.5    -      -       -      +
    103A  TYR*     1.3    82.0    -      -       +      +
    105A  ALA*     1.3    64.7    +      -       -      +
    108A  ILE*     2.9    55.9    +      -       +      -
    112A  TYR*     3.2    38.4    -      -       +      +
    115A  LEU*     4.3    16.8    -      -       +      -
    116A  VAL*     4.5    13.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 105 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101A  ASP      2.9    11.3    +      -       -      +
    102A  ARG*     3.3    42.2    -      -       -      +
    104A  ILE*     1.3    80.3    -      -       -      +
    106A  ILE*     1.3    59.6    +      -       +      +
    109A  PRO*     3.3    25.8    -      -       -      +
    112A  TYR*     3.4    19.5    -      -       +      -
    228A  GLU*     4.6    10.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 106 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    102A  ARG*     2.9    36.7    +      -       +      +
    105A  ALA*     1.3    77.3    -      -       +      +
    107A  ARG*     1.3    71.8    +      -       -      +
    109A  PRO*     3.8     2.0    -      -       -      +
    200A  ILE*     3.9    26.7    -      -       +      +
    204A  ALA*     4.7     5.2    -      -       +      -
    207A  GLN*     5.2     0.9    -      -       -      +
    220A  ARG*     2.9    25.9    +      -       -      +
    225A  LEU*     4.0    22.9    -      -       +      -
    228A  GLU*     3.8    43.1    -      -       +      +
    229A  VAL*     4.2     6.7    -      -       +      -
    232A  ALA*     3.9    18.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 107 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    103A  TYR*     2.9    63.1    +      -       +      +
    106A  ILE*     1.3    84.5    +      -       -      +
    108A  ILE*     1.3    65.6    +      -       +      +
    109A  PRO*     3.4     5.7    -      -       -      +
    199A  ARG*     4.9     7.2    -      -       -      +
    200A  ILE*     4.9     6.7    +      -       +      +
    203A  ALA*     3.5    35.4    +      -       -      +
    206A  ARG*     4.1    14.8    -      -       -      +
    207A  GLN*     2.6    39.4    +      -       -      +
    220A  ARG*     4.9     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 108 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    103A  TYR*     4.6    10.1    -      -       +      +
    104A  ILE*     2.9    47.9    +      -       +      +
    107A  ARG*     1.3    87.0    -      -       +      +
    109A  PRO*     1.3    66.1    -      -       -      +
    110A  LEU      3.2     4.7    +      -       -      -
    111A  ARG*     3.3    24.3    +      -       +      +
    112A  TYR      3.5     6.9    +      -       -      -
    115A  LEU*     4.7    10.8    -      -       +      -
----------------------------------------------------------
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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