Contacts of the helix formed by residues 86 - 110 (chain A) in PDB entry 4H9Q


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

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

Legend:
Dist - nearest distance (Å) between atoms of two residues
Surf - contact surface area (Å2) between two residues
HB   - hydrophilic-hydrophilic contact (hydrogen bond)
Arom - aromatic-aromatic contact
Phob - hydrophobic-hydrophobic contact
DC   - hydrophobic-hydrophilic contact (destabilizing contact)
+/-  - indicates presence/absence of a specific contacts
*    - indicates residues forming contacts  by their side chain
       (including CA atoms)
Residues in contact with SER 86 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     84A  PHE      3.4     1.4    +      -       -      -
     85A  GLN*     1.3    70.3    -      -       -      +
     87A  ALA*     1.3    57.6    +      -       -      +
     89A  ILE*     3.0    25.8    +      -       -      +
     90A  GLY*     3.1     9.9    +      -       -      -
    205C  LEU      3.3    27.0    +      -       -      -
    206C  GLN*     3.6     5.8    +      -       -      +
    208C  LYS      3.0     9.3    +      -       -      -
    210C  LEU*     3.6    20.6    -      -       -      +
    221C  ALA      3.8     1.2    +      -       -      -
    222C  TYR*     3.2    36.5    +      -       -      -
    225C  ALA*     4.8     3.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 87 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     85A  GLN*     3.1     1.1    -      -       -      +
     86A  SER*     1.3    76.0    -      -       -      +
     88A  ALA*     1.3    57.7    +      -       -      +
     90A  GLY*     3.4     3.6    +      -       -      +
     91A  ALA*     3.0    27.9    +      -       -      +
     83B  ALA*     4.0     8.8    -      -       +      +
    206C  GLN*     3.1    31.1    +      -       +      +
    337C  GLY*     6.1     0.5    -      -       -      -
    338C  CYS*     3.7    30.5    -      -       -      -
    340C  LEU*     3.9    10.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 88 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     84A  PHE*     4.6     9.2    -      -       +      -
     85A  GLN*     2.9    14.9    +      -       -      +
     87A  ALA*     1.3    76.1    -      -       -      +
     89A  ILE*     1.3    58.3    +      -       -      +
     91A  ALA*     3.4     3.3    +      -       -      +
     92A  LEU*     2.9    36.0    +      -       -      +
     81B  VAL      3.8     9.9    -      -       -      +
     82B  THR      3.7    10.3    -      -       -      +
     83B  ALA*     3.7    29.5    -      -       -      +
     86B  VAL*     3.8    12.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 89 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     67A  PHE*     3.6    17.5    -      -       +      -
     68A  GLN*     4.3     9.0    -      -       +      -
     71A  VAL*     3.7    31.9    -      -       +      -
     84A  PHE*     3.9    17.9    -      -       +      -
     85A  GLN      3.8     9.2    -      -       -      +
     86A  SER*     3.0    14.8    +      -       -      +
     88A  ALA*     1.3    77.4    -      -       -      +
     90A  GLY*     1.3    57.1    +      -       -      +
     92A  LEU*     3.4     7.6    +      -       +      +
     93A  GLN*     2.9    24.8    +      -       -      +
    210C  LEU*     5.0     3.8    -      -       +      -
    215C  LEU*     3.8    23.1    -      -       +      -
    222C  TYR*     3.6    32.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 90 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     60A  LEU*     5.4     1.9    -      -       -      +
     86A  SER      3.1    11.6    +      -       -      -
     87A  ALA*     3.4     4.7    +      -       -      -
     88A  ALA      3.3     0.4    -      -       -      -
     89A  ILE*     1.3    78.3    -      -       -      +
     91A  ALA*     1.3    60.6    +      -       -      +
     93A  GLN*     3.2     2.4    +      -       -      +
     94A  GLU*     3.0    25.3    +      -       -      +
    222C  TYR*     3.5    21.4    -      -       -      -
    229C  LYS*     5.8     5.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 91 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     87A  ALA      3.0    17.2    +      -       -      +
     88A  ALA*     3.4     6.0    +      -       -      +
     90A  GLY*     1.3    70.7    -      -       -      +
     92A  LEU*     1.3    66.9    +      -       -      +
     94A  GLU*     3.4     1.0    +      -       -      -
     95A  ALA*     3.0    26.5    +      -       -      +
     83B  ALA*     5.2     7.6    -      -       +      +
     86B  VAL*     4.0    17.0    -      -       +      -
     87B  VAL*     5.5     1.8    -      -       +      -
    336C  PHE*     3.6    32.3    -      -       +      -
    337C  GLY*     5.3     8.7    -      -       -      +
    341C  THR*     6.1     0.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 92 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     67A  PHE*     3.7    10.3    -      -       +      -
     71A  VAL*     4.0    27.4    -      -       +      -
     84A  PHE*     4.5     9.6    -      -       +      -
     88A  ALA      2.9    22.5    +      -       -      +
     89A  ILE*     3.5     9.9    -      -       +      +
     91A  ALA*     1.3    77.5    -      -       -      +
     93A  GLN*     1.3    56.8    +      -       -      +
     95A  ALA*     3.8     4.1    -      -       -      +
     96A  ALA*     2.9    31.7    +      -       -      +
     61B  PHE*     5.0     0.7    -      -       +      -
     62B  LEU*     4.2    12.4    -      -       +      +
     65B  VAL*     3.5    37.7    -      -       +      -
     66B  ILE*     4.2    20.9    -      -       +      -
     86B  VAL*     3.9    16.5    -      -       +      +
     90B  LEU*     5.2     0.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 93 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     60A  LEU*     3.9    19.0    -      -       +      +
     62A  ILE*     2.8    33.7    +      -       -      +
     64A  LYS*     3.7    10.8    -      -       -      +
     67A  PHE*     3.3    45.9    -      -       +      +
     89A  ILE      2.9     8.5    +      -       -      +
     90A  GLY      3.2     2.2    +      -       -      +
     92A  LEU*     1.3    73.8    -      -       -      +
     94A  GLU*     1.3    67.3    +      -       -      +
     96A  ALA*     4.0     0.2    -      -       -      +
     97A  GLU*     2.9    45.6    +      -       +      +
    222C  TYR*     2.6    33.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 94 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     56A  LYS*     3.1    45.0    +      -       -      +
     57A  SER*     5.0     0.9    +      -       -      -
     60A  LEU*     4.0    25.2    -      -       +      +
     90A  GLY      3.0    15.3    +      -       -      +
     91A  ALA*     3.9     4.0    -      -       -      +
     93A  GLN*     1.3    76.6    -      -       -      +
     95A  ALA*     1.3    62.1    +      -       -      +
     97A  GLU*     3.6     1.9    +      -       -      +
     98A  ALA*     3.1    22.7    +      -       -      +
    332C  LEU*     3.4    21.1    -      -       +      +
    335C  ASN      3.3    15.1    -      -       -      +
    336C  PHE*     3.6    15.2    -      -       +      -
    337C  GLY      5.3     0.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 95 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91A  ALA      3.0    18.0    +      -       -      +
     92A  LEU      3.9     1.8    -      -       -      +
     94A  GLU*     1.3    76.6    -      -       -      +
     96A  ALA*     1.3    59.8    +      -       -      +
     98A  ALA*     3.2     2.8    +      -       -      -
     99A  PHE*     2.9    26.0    +      -       -      +
     61B  PHE*     4.1     2.7    -      -       +      -
     90B  LEU*     3.6    35.9    -      -       +      -
     96B  THR*     3.5    21.6    -      -       +      +
     97B  LEU*     5.3     2.7    -      -       +      -
    332C  LEU*     5.3     1.8    -      -       -      -
    336C  PHE*     4.2     7.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 96 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     67A  PHE*     4.2     6.3    -      -       +      -
     92A  LEU      2.9    19.6    +      -       -      +
     93A  GLN      4.0     2.7    -      -       -      +
     95A  ALA*     1.3    76.2    -      -       -      +
     97A  GLU*     1.3    63.5    +      -       +      +
     99A  PHE*     3.2     3.7    +      -       -      +
    100A  LEU*     3.0    28.6    +      -       -      +
     58B  LEU*     3.6    26.9    -      -       +      -
     61B  PHE*     3.6    15.8    -      -       +      -
     62B  LEU*     3.8    15.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 97 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     60A  LEU*     3.6    17.5    -      -       +      +
     61A  LEU*     2.7    31.6    +      -       -      +
     62A  ILE*     2.8    44.9    +      -       +      +
     67A  PHE*     5.9     0.2    -      -       +      -
     93A  GLN*     2.9    41.0    +      -       +      +
     94A  GLU      4.1     2.5    -      -       -      +
     96A  ALA*     1.3    78.1    -      -       +      +
     98A  ALA*     1.3    62.7    +      -       -      +
    100A  LEU*     3.8     5.5    -      -       -      +
    101A  VAL*     2.9    32.0    +      -       +      +
     37B  LEU*     3.8    11.1    -      -       +      +
     40B  ARG*     4.7     3.1    +      -       -      -
----------------------------------------------------------
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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
----------------------------------------------------------
     94A  GLU      3.1    15.7    +      -       -      +
     95A  ALA      3.2     7.6    +      -       -      +
     97A  GLU*     1.3    76.0    -      -       -      +
     99A  PHE*     1.3    57.2    +      -       -      +
    101A  VAL*     3.9     5.5    -      -       -      +
    102A  ALA*     2.9    31.9    +      -       -      +
     96B  THR*     4.1     5.8    -      -       +      -
    332C  LEU*     3.6    30.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 99 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     95A  ALA      2.9    13.4    +      -       -      +
     96A  ALA      3.4     7.2    -      -       -      +
     98A  ALA*     1.3    76.5    -      -       -      +
    100A  LEU*     1.3    72.4    +      -       +      +
    102A  ALA*     3.4     7.0    +      -       -      +
    103A  LEU*     3.1    41.9    +      -       +      +
    128A  ARG*     6.2     1.3    -      -       -      -
    133A  GLU*     4.2    16.6    -      -       -      -
     57B  VAL*     3.5    26.7    -      -       +      -
     58B  LEU*     6.4     0.2    -      -       +      -
     61B  PHE*     3.5    46.0    -      +       +      -
     93B  GLN      5.6     2.5    -      -       -      -
     95B  ARG*     5.1     2.0    +      -       -      -
     96B  THR*     3.5    21.9    -      -       -      +
    372C  LEU*     3.9    30.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 100 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     62A  ILE*     4.4     7.6    -      -       +      -
     96A  ALA      3.0    18.8    +      -       -      +
     97A  GLU*     3.8     3.6    -      -       -      +
     99A  PHE*     1.3    79.4    -      -       +      +
    101A  VAL*     1.3    67.1    +      -       -      +
    103A  LEU*     3.1    17.9    +      -       +      +
    104A  PHE*     3.1    28.9    +      -       +      -
     37B  LEU*     4.0    29.8    -      -       +      -
     54B  THR*     4.1    21.5    -      -       +      +
     57B  VAL*     4.0    27.6    -      -       +      -
     58B  LEU*     4.0    37.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 101 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     97A  GLU*     2.9    24.1    +      -       +      +
     98A  ALA*     3.9     5.6    -      -       -      +
    100A  LEU*     1.3    77.4    -      -       -      +
    102A  ALA*     1.3    58.3    +      -       -      +
    104A  PHE*     3.0     6.0    +      -       -      +
    105A  GLU*     2.8    44.6    +      -       -      +
     37B  LEU*     3.8    36.3    -      -       +      +
     40B  ARG*     4.0    19.3    -      -       +      -
     41B  GLY*     4.0    12.8    -      -       -      +
    328C  ARG*     3.7    15.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 102 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98A  ALA      2.9    18.9    +      -       -      +
     99A  PHE*     3.8     5.6    -      -       -      +
    101A  VAL*     1.3    72.2    -      -       -      +
    103A  LEU*     1.3    66.8    +      -       -      +
    105A  GLU*     3.6    19.5    -      -       -      +
    106A  ASP*     2.9    29.5    +      -       -      -
     95B  ARG*     3.4    26.0    -      -       -      +
     96B  THR*     6.1     0.7    -      -       -      +
    325C  GLN*     5.1     2.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 103 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99A  PHE*     3.1    37.6    +      -       +      +
    100A  LEU*     3.1    14.6    +      -       +      +
    102A  ALA*     1.3    75.2    -      -       -      +
    104A  PHE*     1.3    62.3    +      -       +      +
    106A  ASP*     3.5     5.5    +      -       +      +
    107A  THR*     3.0    31.2    +      -       -      -
    124A  ILE*     4.9    17.2    -      -       +      +
    127A  ALA*     5.5     0.2    -      -       -      +
    128A  ARG*     4.6    26.5    -      -       +      +
    133A  GLU*     6.5     0.9    -      -       +      -
     57B  VAL*     3.6    34.1    -      -       +      -
     95B  ARG*     4.4    12.3    -      -       -      +
    376C  ILE*     4.9     8.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 104 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    100A  LEU*     3.1    29.3    +      -       +      -
    101A  VAL      3.0     7.4    +      -       -      +
    103A  LEU*     1.3    77.6    -      -       +      +
    105A  GLU*     1.3    58.9    +      -       -      +
    107A  THR*     3.3     2.5    +      -       -      -
    108A  ASN*     2.9    31.2    +      -       -      +
    119A  ILE*     5.4     0.4    -      -       +      -
    124A  ILE*     4.2    20.2    -      -       +      -
     34B  ILE*     5.0     3.1    -      -       +      -
     37B  LEU*     4.1     8.5    -      -       +      +
     38B  ALA*     3.6    55.9    -      -       +      +
     41B  GLY*     3.8     5.8    -      -       -      -
     43B  VAL*     3.5    17.0    -      -       +      +
     46B  ILE*     4.3     4.9    -      -       +      -
     50B  ILE*     4.0    18.8    -      -       +      -
     54B  THR*     3.6    33.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 105 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101A  VAL*     2.8    26.8    +      -       -      +
    102A  ALA*     3.6    17.0    -      -       -      +
    104A  PHE*     1.3    70.8    -      -       -      +
    106A  ASP*     1.3    59.3    +      -       -      +
    108A  ASN*     3.2     2.9    +      -       -      +
    109A  LEU*     2.9    34.8    +      -       -      +
     41B  GLY*     3.4    21.2    +      -       -      -
    283C  PHE*     3.8    25.8    -      -       +      -
    325C  GLN*     2.9    31.2    +      -       -      +
    328C  ARG*     2.8    36.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 106 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    102A  ALA      2.9    16.5    +      -       -      +
    103A  LEU*     3.8     5.9    -      -       +      +
    105A  GLU*     1.3    75.5    -      -       -      +
    107A  THR*     1.3    64.9    +      -       -      +
    109A  LEU      3.3     1.2    +      -       -      -
    110A  CYS*     3.2    27.4    +      -       -      -
    127A  ALA*     3.9    11.2    -      -       +      +
    128A  ARG*     5.3     1.3    -      -       -      +
    131A  ARG*     3.2    38.8    +      -       +      +
    132A  GLY*     3.6     8.7    -      -       -      -
     95B  ARG*     2.6    39.8    +      -       -      -
    325C  GLN*     3.2    16.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with THR 107 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    103A  LEU      3.0    15.6    +      -       -      -
    104A  PHE*     3.6     7.9    -      -       -      -
    105A  GLU      3.3     0.2    -      -       -      -
    106A  ASP*     1.3    77.4    -      -       -      +
    108A  ASN*     1.3    59.1    +      -       -      +
    110A  CYS*     3.2    10.2    +      -       -      +
    111A  THR*     2.8    27.1    +      -       -      +
    119A  ILE*     3.8    37.9    -      -       +      -
    123A  ASP*     4.0    20.9    -      -       +      +
    124A  ILE*     3.3    27.7    +      -       -      +
    127A  ALA*     3.5    10.6    -      -       -      +
     43B  VAL*     4.6     2.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 108 (chain A). Click here for Legend to table.
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                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    104A  PHE      2.9    17.5    +      -       -      +
    105A  GLU      3.3     4.0    -      -       -      +
    107A  THR*     1.3    77.0    -      -       -      +
    109A  LEU*     1.3    61.4    +      -       -      +
    111A  THR*     3.0    26.1    +      -       -      +
    119A  ILE*     6.2     0.7    -      -       -      -
     41B  GLY      3.2    19.7    +      -       -      +
     42B  GLY*     3.7    10.7    -      -       -      +
     43B  VAL*     4.0    11.4    -      -       +      +
    283C  PHE*     3.4    15.8    -      -       -      -
    284C  PRO      3.0    24.2    +      -       -      -
    285C  ASP*     3.3    23.7    -      -       -      +
    286C  TYR      4.1     0.3    +      -       -      -
    317C  PHE*     3.5     9.1    -      -       -      -
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Residues in contact with LEU 109 (chain A). Click here for Legend to table.
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                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    105A  GLU      2.9    20.0    +      -       -      +
    106A  ASP      3.3     4.9    +      -       -      +
    108A  ASN*     1.3    75.3    -      -       -      +
    110A  CYS*     1.3    59.4    +      -       -      +
    111A  THR      3.6     0.2    +      -       -      -
    112A  ILE*     4.0    14.0    -      -       -      +
    131A  ARG*     3.3    40.8    -      -       -      +
    283C  PHE*     4.1    13.2    -      -       +      -
    317C  PHE*     3.6    36.1    -      -       +      +
    318C  ARG*     5.5     2.5    -      -       -      +
    321C  GLY*     3.7    31.6    -      -       -      -
    322C  ILE      4.9     0.2    -      -       -      +
    325C  GLN*     3.6    17.7    -      -       -      +
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Residues in contact with CYS 110 (chain A). Click here for Legend to table.
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                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    106A  ASP      3.2    18.5    +      -       -      +
    107A  THR      3.2     5.1    +      -       -      +
    108A  ASN      3.1     1.0    -      -       -      -
    109A  LEU*     1.3    77.4    -      -       -      +
    111A  THR*     1.3    60.3    +      -       -      +
    112A  ILE*     3.7     8.0    +      -       -      +
    126A  LEU*     6.4     0.2    -      -       +      -
    127A  ALA*     3.8    22.7    -      -       +      -
    130A  ILE*     4.0    26.9    -      -       +      +
    131A  ARG*     3.5    26.9    -      -       -      -
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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