Contacts of the helix formed by residues 90 - 114 (chain C) in PDB entry 4GTU


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 GLU 90 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     89C  THR*     1.3    73.2    -      -       -      +
     91C  GLU*     1.3    64.4    +      -       -      +
     93C  LYS*     3.0    14.9    +      -       -      +
     94C  ILE*     3.1    23.9    +      -       +      +
     67D  HIS*     5.1     5.6    -      -       -      +
     78D  TYR*     4.2     9.2    -      -       +      -
     81D  ARG*     3.0    48.9    +      -       -      +
     82D  LYS*     4.2    19.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 91 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     89C  THR*     3.6    10.5    +      -       -      +
     90C  GLU*     1.3    79.3    -      -       -      +
     92C  GLU*     1.3    70.8    +      -       -      +
     94C  ILE*     3.0    23.4    +      -       +      +
     95C  ARG*     3.2    34.4    +      -       +      +
    148C  VAL      5.9     0.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 92 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     87C  GLY*     3.4    16.4    -      -       -      -
     88C  GLU*     3.6     4.7    +      -       -      +
     89C  THR*     2.7    52.3    +      -       -      +
     91C  GLU*     1.3    86.5    -      -       -      +
     93C  LYS*     1.3    58.9    +      -       -      +
     95C  ARG*     3.0     4.4    +      -       -      +
     96C  VAL*     2.8    34.7    +      -       -      +
    148C  VAL*     3.3    34.0    -      -       +      +
    149C  GLY*     5.9     0.2    -      -       -      -
    151C  LYS*     3.9    32.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 93 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     86C  CYS*     6.4     0.4    -      -       -      -
     87C  GLY*     3.2    29.4    +      -       -      +
     88C  GLU*     3.6    15.6    +      -       -      +
     89C  THR      3.0    13.1    +      -       -      +
     90C  GLU*     3.0    12.6    +      -       -      +
     92C  GLU*     1.3    75.4    -      -       -      +
     94C  ILE*     1.3    56.0    +      -       -      +
     96C  VAL*     4.2     6.3    -      -       -      -
     97C  ASP*     2.8    35.1    -      -       -      +
     81D  ARG*     3.5    41.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 94 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     90C  GLU*     3.3    29.4    -      -       +      +
     91C  GLU*     3.0    16.3    +      -       -      +
     93C  LYS*     1.3    77.3    -      -       -      +
     95C  ARG*     1.3    65.9    +      -       +      +
     97C  ASP*     3.9     3.9    -      -       -      +
     98C  ILE*     3.0    39.6    +      -       +      +
     67D  HIS*     3.6    23.1    -      -       +      -
     68D  LYS      5.2     2.0    -      -       -      +
     69D  ILE*     3.2    27.4    -      -       +      +
     78D  TYR*     3.6    30.7    -      -       +      -
     81D  ARG*     5.0     1.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 95 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91C  GLU*     3.2    33.6    +      -       +      +
     92C  GLU*     3.0     4.0    +      -       -      +
     94C  ILE*     1.3    81.9    -      -       +      +
     96C  VAL*     1.3    65.2    -      -       -      +
     97C  ASP      3.3     0.2    -      -       -      -
     98C  ILE*     3.8     0.8    +      -       +      -
     99C  LEU*     3.4    28.6    +      -       -      +
    140C  PHE*     2.8    61.2    +      -       +      +
    144C  ARG*     2.7    33.1    -      -       -      +
    147C  PHE      2.5    29.3    +      -       -      -
    148C  VAL*     3.5    23.6    -      -       +      +
     55D  ASP*     4.8     4.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 96 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     86C  CYS*     4.5     2.9    -      -       +      -
     87C  GLY*     3.8    26.2    -      -       -      +
     92C  GLU      2.8    25.1    +      -       -      +
     93C  LYS*     4.5     2.2    -      -       -      -
     95C  ARG*     1.3    71.9    -      -       -      +
     97C  ASP*     1.3    71.5    +      -       -      +
    100C  GLU*     3.0    19.3    +      -       +      +
    148C  VAL*     3.6    24.5    -      -       +      -
    153C  THR*     4.6     4.9    -      -       +      +
    154C  PHE*     3.5    34.5    -      -       +      -
    155C  VAL*     3.2    16.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 97 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     93C  LYS*     2.8    26.8    -      -       -      +
     94C  ILE*     3.9     5.6    -      -       -      +
     96C  VAL*     1.3    78.9    -      -       -      +
     98C  ILE*     1.3    68.2    +      -       -      +
    100C  GLU*     2.7    29.3    +      -       -      +
    101C  ASN*     3.0    11.6    +      -       -      +
     69D  ILE*     6.0     0.2    -      -       +      -
     74D  ALA*     3.6    21.2    -      -       +      +
     77D  CYS*     3.3    32.4    -      -       -      +
     81D  ARG*     3.4     8.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 98 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     94C  ILE*     3.0    31.1    +      -       +      +
     95C  ARG*     4.0     4.3    -      -       +      +
     97C  ASP*     1.3    78.7    -      -       -      +
     99C  LEU*     1.3    56.0    +      -       -      +
    101C  ASN*     3.1     1.6    +      -       -      +
    102C  GLN*     2.6    46.1    +      -       +      +
    140C  PHE*     4.0    22.0    -      -       +      -
     55D  ASP*     4.6    10.1    -      -       +      +
     56D  PHE*     4.1    27.6    -      -       +      -
     68D  LYS      4.7    11.0    -      -       -      +
     69D  ILE*     4.6     3.1    -      -       +      -
     70D  THR*     4.3    29.2    -      -       -      +
     71D  GLN*     4.3     2.6    -      -       +      +
     74D  ALA*     4.0    10.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 99 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     95C  ARG      3.4    13.9    +      -       -      +
     96C  VAL      4.0     2.0    -      -       -      +
     97C  ASP      3.3     0.4    -      -       -      -
     98C  ILE*     1.3    77.6    -      -       -      +
    100C  GLU*     1.3    65.7    +      -       -      +
    102C  GLN*     4.1     4.0    -      -       -      -
    103C  ALA*     2.7    32.3    +      -       +      +
    137C  PHE*     4.7    17.3    -      -       +      -
    140C  PHE*     3.7    22.9    -      -       +      -
    147C  PHE*     3.3    55.2    -      -       +      -
    148C  VAL*     4.7     2.0    -      -       +      -
    155C  VAL*     3.7    30.3    -      -       +      +
    158C  LEU*     5.4     1.1    -      -       +      -
    159C  ALA*     5.2     5.8    -      -       +      -
     56D  PHE*     4.8     6.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 100 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     73C  ASN*     2.9    43.8    +      -       +      +
     77C  CYS*     5.9     4.5    -      -       -      -
     96C  VAL*     3.0    15.5    +      -       +      +
     97C  ASP*     2.7    23.0    +      -       -      +
     99C  LEU*     1.3    74.6    -      -       -      +
    101C  ASN*     1.3    83.6    +      -       -      +
    104C  MET*     3.4    16.3    +      -       -      +
    154C  PHE*     4.3    22.7    -      -       +      -
    155C  VAL*     4.2     5.3    -      -       +      +
    158C  LEU*     4.1    17.6    -      -       +      +
     73D  ASN*     5.7     0.9    -      -       -      +
    100D  GLU*     5.2     6.9    -      -       -      +
    101D  ASN*     4.7     1.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 101 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     73C  ASN*     5.2     1.8    +      -       -      +
     97C  ASP*     3.0    17.8    +      -       -      +
     98C  ILE      3.9     1.1    -      -       -      +
    100C  GLU*     1.3   100.9    +      -       -      +
    102C  GLN*     1.3    66.9    +      -       -      +
    104C  MET*     2.8     9.5    +      -       -      +
    105C  ASP*     2.7    20.8    +      -       -      +
     71D  GLN*     3.0    28.9    -      -       +      +
     73D  ASN*     3.5    28.1    +      -       -      +
     74D  ALA*     3.7    22.3    -      -       -      +
     77D  CYS*     6.0     0.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 102 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98C  ILE*     2.6    30.3    +      -       +      +
     99C  LEU*     3.9     4.3    -      -       -      +
    101C  ASN*     1.3    71.1    -      -       -      +
    103C  ALA*     1.3    57.6    +      -       -      +
    105C  ASP*     3.0    21.5    +      -       -      +
    106C  VAL*     2.9    29.9    +      -       -      +
    133C  MET*     3.7    22.2    -      -       -      +
    137C  PHE*     4.6     7.0    -      -       +      -
     56D  PHE*     3.7    48.7    -      -       +      +
     58D  ASN*     5.0     2.7    +      -       -      +
     70D  THR*     4.3     4.3    -      -       -      +
     71D  GLN*     3.3    27.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 103 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99C  LEU*     2.7    26.3    +      -       +      +
    100C  GLU      4.1     1.8    -      -       -      +
    102C  GLN*     1.3    72.9    -      -       -      +
    104C  MET*     1.3    55.8    +      -       -      +
    106C  VAL*     3.1    12.2    -      -       -      +
    107C  SER*     2.9    30.8    +      -       -      -
    137C  PHE*     4.8     8.7    -      -       +      -
    158C  LEU*     4.4    20.9    -      -       +      -
    159C  ALA*     4.8     4.7    -      -       +      +
    162C  VAL*     3.5    22.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with MET 104 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     12C  LEU*     4.2    19.3    -      -       +      +
     72C  SER*     4.1    25.4    -      -       -      +
     73C  ASN*     3.6    33.0    -      -       -      +
     76C  LEU*     5.5     0.2    -      -       +      -
    100C  GLU      3.4    10.9    +      -       -      +
    101C  ASN*     2.8    11.9    +      -       -      +
    103C  ALA*     1.3    74.7    -      -       -      +
    105C  ASP*     1.3    57.9    +      -       -      +
    107C  SER*     3.7    10.2    -      -       -      -
    108C  ASN*     2.9    54.1    +      -       -      +
    158C  LEU*     4.1    21.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 105 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101C  ASN      2.7    10.7    +      -       -      +
    102C  GLN*     3.1    25.1    +      -       -      +
    104C  MET*     1.3    78.5    -      -       -      +
    106C  VAL*     1.3    57.0    +      -       -      +
    108C  ASN*     3.4     4.6    +      -       -      +
    109C  GLN*     3.0    37.1    +      -       -      +
     58D  ASN*     5.4     1.4    +      -       -      -
     71D  GLN*     3.6    23.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 106 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    102C  GLN*     2.9    18.1    +      -       -      +
    103C  ALA*     3.1    15.7    -      -       -      +
    105C  ASP*     1.3    74.3    +      -       -      +
    107C  SER*     1.3    56.6    +      -       -      +
    109C  GLN*     3.0    22.5    +      -       -      +
    110C  LEU*     2.9    27.5    +      -       -      +
    126C  TYR*     3.9    19.2    +      -       -      +
    130C  LEU*     6.1     0.4    -      -       +      -
    133C  MET*     4.4    26.2    -      -       +      -
    137C  PHE*     3.8    18.6    -      -       +      -
    162C  VAL*     3.5    22.2    -      -       +      -
    166C  HIS*     4.1     9.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 107 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     12C  LEU*     5.6     4.0    -      -       -      +
    103C  ALA      2.9    19.5    +      -       -      -
    104C  MET*     3.7    17.0    -      -       -      -
    106C  VAL*     1.3    78.6    -      -       -      +
    108C  ASN*     1.3    57.1    +      -       -      +
    110C  LEU*     3.1    11.6    +      -       -      +
    111C  ALA*     3.0    27.4    +      -       -      +
    161C  ASP*     5.2     4.5    +      -       -      -
    162C  VAL*     4.5    14.8    -      -       -      +
    165C  LEU*     4.8    13.4    -      -       -      +
    166C  HIS*     5.7     1.1    -      -       -      -
    208C  TYR*     4.7     1.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 108 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     12C  LEU*     5.2     8.9    -      -       -      +
    104C  MET*     2.9    43.2    +      -       -      +
    105C  ASP*     3.9     4.7    -      -       -      +
    107C  SER*     1.3    73.4    -      -       -      +
    109C  GLN*     1.3    62.9    +      -       -      +
    110C  LEU      3.3     0.2    -      -       -      -
    111C  ALA*     4.0     9.4    -      -       -      +
    112C  ARG*     3.2    30.8    +      -       -      +
    112D  ARG*     5.2    12.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 109 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    105C  ASP*     3.0    21.9    +      -       -      +
    106C  VAL*     3.0    27.0    -      -       -      +
    108C  ASN*     1.3    78.2    -      -       -      +
    110C  LEU*     1.3    60.7    +      -       -      +
    112C  ARG*     3.2    24.3    -      -       -      +
    113C  VAL*     3.7    10.7    +      -       -      +
    126C  TYR*     3.3    30.9    -      -       +      -
    129C  GLU*     6.2     0.2    -      -       -      +
    133C  MET*     4.7    16.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 110 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    106C  VAL      2.9    11.9    +      -       -      +
    107C  SER*     3.3    10.5    -      -       -      +
    109C  GLN*     1.3    73.1    -      -       -      +
    111C  ALA*     1.3    65.0    +      -       -      +
    112C  ARG      3.0     1.1    -      -       -      -
    113C  VAL*     2.8    31.9    +      -       +      +
    114C  CYS*     3.2     4.1    +      -       -      +
    126C  TYR*     3.7    26.2    +      -       +      +
    165C  LEU*     4.1    20.9    -      -       +      -
    166C  HIS*     3.2    33.0    -      -       +      +
    169C  PHE*     3.7    36.3    -      -       +      -
    208C  TYR*     3.3    22.0    -      -       +      +
    214C  TRP*     6.5     0.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 111 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    107C  SER      3.0    14.6    +      -       -      +
    108C  ASN*     4.5    11.0    -      -       -      +
    110C  LEU*     1.3    76.0    -      -       -      +
    112C  ARG*     1.3    62.5    +      -       -      +
    114C  CYS*     4.1     2.0    -      -       -      -
    115C  TYR*     2.9    40.4    +      -       +      +
    208C  TYR*     3.5    32.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 112 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108C  ASN*     3.2    24.0    +      -       -      +
    109C  GLN*     3.2    19.4    -      -       -      +
    110C  LEU      3.0     0.6    +      -       -      -
    111C  ALA*     1.3    77.3    -      -       -      +
    113C  VAL*     1.3    57.1    +      -       +      +
    115C  TYR*     3.7     4.5    +      -       -      +
    116C  SER*     2.7    31.6    +      -       -      +
    108D  ASN*     5.1     7.1    +      -       -      +
    111D  ALA*     6.2     0.6    -      -       -      +
    112D  ARG*     3.1    65.8    -      -       -      +
    115D  TYR*     6.0     3.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 113 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    109C  GLN      3.9    10.1    -      -       -      +
    110C  LEU*     2.8    39.5    +      -       +      +
    112C  ARG*     1.3    76.4    -      -       +      +
    114C  CYS*     1.3    56.8    +      -       -      +
    115C  TYR      3.0     4.5    -      -       -      -
    116C  SER*     2.9    28.3    +      -       -      +
    119C  PHE*     3.2    33.3    -      -       +      -
    122C  LEU*     5.0    24.0    -      -       +      +
    123C  LYS*     5.8     0.7    -      -       -      -
    126C  TYR*     4.9    21.1    -      -       +      -
    169C  PHE*     4.7     4.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with CYS 114 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    110C  LEU*     3.2    12.4    +      -       -      +
    111C  ALA      3.1     7.4    +      -       -      +
    113C  VAL*     1.3    76.3    -      -       -      +
    115C  TYR*     1.3    59.9    +      -       +      +
    116C  SER      3.4     0.4    -      -       -      -
    119C  PHE*     4.0     9.0    -      -       -      -
    169C  PHE*     4.0    18.2    -      -       -      -
    208C  TYR*     3.4    45.5    -      -       +      -
    212C  ALA*     3.3     3.8    -      -       -      +
    213C  VAL*     2.8    31.6    +      -       -      +
    214C  TRP*     3.5    28.6    +      -       -      +
----------------------------------------------------------
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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