Contacts of the helix formed by residues 126 - 149 (chain C) in PDB entry 4NEF


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

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

Legend:
Dist - nearest distance (Å) between atoms of two residues
Surf - contact surface area (Å2) between two residues
HB   - hydrophilic-hydrophilic contact (hydrogen bond)
Arom - aromatic-aromatic contact
Phob - hydrophobic-hydrophobic contact
DC   - hydrophobic-hydrophilic contact (destabilizing contact)
+/-  - indicates presence/absence of a specific contacts
*    - indicates residues forming contacts  by their side chain
       (including CA atoms)
Residues in contact with THR 126 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121C  LEU*     4.1     1.8    -      -       -      -
    124C  SER      4.5     5.8    -      -       -      +
    125C  THR*     1.3    75.4    -      -       -      +
    127C  ALA*     1.4    52.3    +      -       -      +
    128C  GLY*     3.8     4.0    +      -       -      -
    129C  GLN*     3.0    38.8    +      -       -      +
    130C  ALA*     2.8    32.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 127 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121C  LEU*     3.7    20.0    -      -       +      +
    126C  THR*     1.4    71.9    -      -       -      +
    128C  GLY*     1.3    56.0    +      -       -      +
    130C  ALA*     3.7     5.2    -      -       -      +
    131C  VAL*     2.9    32.4    +      -       -      +
    200C  ASP*     4.9     6.3    -      -       +      +
    202C  TRP*     3.7    27.5    -      -       +      +
    203C  VAL*     3.7    12.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 128 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    126C  THR*     3.2     5.8    +      -       -      -
    127C  ALA*     1.3    75.8    -      -       -      +
    129C  GLN*     1.4    54.4    +      -       -      +
    131C  VAL*     3.4    15.8    -      -       -      +
    132C  THR*     2.7    27.5    +      -       -      -
    202C  TRP*     5.0     2.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 129 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    106A  GLU      2.7    24.8    +      -       -      +
    107A  ILE*     3.3    40.1    -      -       +      +
    108A  THR      4.1     7.7    +      -       -      +
    109A  PRO*     4.3    10.1    -      -       -      +
    113A  ARG*     4.6     4.8    -      -       -      +
    124C  SER      4.8     0.9    -      -       -      +
    125C  THR*     3.8    11.0    -      -       +      +
    126C  THR*     3.0    40.9    +      -       -      +
    128C  GLY*     1.4    74.0    -      -       -      +
    130C  ALA*     1.4    63.5    +      -       -      +
    132C  THR*     3.4     5.9    +      -       -      -
    133C  VAL*     3.2    25.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 130 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121C  LEU*     3.2    35.0    -      -       +      -
    125C  THR*     3.9     8.0    -      -       +      +
    126C  THR      2.8     8.0    +      -       -      +
    127C  ALA*     3.7     5.2    -      -       -      +
    129C  GLN*     1.4    74.5    -      -       -      +
    131C  VAL*     1.4    59.3    +      -       -      +
    133C  VAL*     3.2     9.1    +      -       -      +
    134C  GLU*     3.0    31.7    +      -       -      +
    178C  TYR*     5.2     0.7    -      -       -      -
    179C  THR*     3.6    16.7    -      -       +      +
    203C  VAL*     3.8     8.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 131 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    127C  ALA      2.9    20.5    +      -       -      +
    128C  GLY*     3.4    21.3    -      -       -      +
    130C  ALA*     1.4    72.3    -      -       -      +
    132C  THR*     1.4    57.9    +      -       -      +
    134C  GLU*     3.7     2.1    +      -       -      -
    135C  LEU*     3.1    27.4    +      -       -      +
    202C  TRP*     3.8    28.9    -      -       +      -
    203C  VAL*     3.6    15.0    -      -       +      +
    206C  ILE*     3.9    10.5    -      -       +      -
    207C  GLY*     3.5    28.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 132 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     25A  PHE*     5.5     0.4    -      -       -      -
    103A  LEU*     4.3     7.6    -      -       +      -
    106A  GLU*     4.6     8.1    +      -       -      +
    107A  ILE*     3.7    19.9    -      -       +      +
    128C  GLY      2.7    21.8    +      -       -      -
    129C  GLN*     3.4     9.2    +      -       -      -
    130C  ALA      3.2     0.4    -      -       -      -
    131C  VAL*     1.4    77.6    -      -       -      +
    133C  VAL*     1.4    63.2    +      -       -      +
    135C  LEU*     3.4    10.0    -      -       +      +
    136C  PHE*     3.1    47.9    +      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 133 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     25A  PHE*     4.6     7.8    -      -       +      -
    107A  ILE*     3.7    29.6    -      -       +      -
    129C  GLN      3.2    15.8    +      -       -      +
    130C  ALA*     3.2     8.0    +      -       -      +
    132C  THR*     1.4    73.8    -      -       -      +
    134C  GLU*     1.4    51.5    +      -       +      +
    136C  PHE*     3.0     7.8    +      -       -      +
    137C  LEU*     2.9    58.7    +      -       +      +
    174C  LEU*     4.4     9.2    -      -       +      -
    175C  GLY*     4.5     1.8    -      -       -      -
    178C  TYR*     3.8    42.0    -      -       +      -
    179C  THR*     5.5     2.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 134 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    130C  ALA      3.0    17.5    +      -       -      +
    131C  VAL      3.9     0.9    -      -       -      +
    133C  VAL*     1.4    73.8    -      -       +      +
    135C  LEU*     1.3    58.3    +      -       -      +
    137C  LEU*     3.7    14.3    -      -       +      +
    138C  THR*     2.8    30.8    +      -       -      -
    179C  THR*     2.7    34.6    +      -       +      +
    182C  SER*     2.8    30.1    +      -       -      -
    183C  MET*     2.8    29.3    +      -       -      -
    203C  VAL*     4.2    13.5    -      -       +      +
    204C  PHE*     4.9     1.3    -      -       +      -
    207C  GLY*     3.6    25.2    -      -       -      +
    208C  PRO*     3.8     4.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 135 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    131C  VAL      3.1    15.3    +      -       -      +
    132C  THR*     3.4    15.3    -      -       +      +
    133C  VAL      3.2     0.2    -      -       -      -
    134C  GLU*     1.3    75.5    -      -       -      +
    136C  PHE*     1.4    84.1    +      -       +      +
    138C  THR      3.4     1.2    +      -       -      -
    139C  LEU*     2.9    32.4    +      -       +      +
    207C  GLY*     3.4    12.8    +      -       -      +
    210C  VAL*     3.7    27.4    -      -       +      -
    211C  GLY*     3.3    22.2    -      -       -      +
    214C  LEU*     4.2    19.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 136 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18A  LEU*     5.9     2.7    -      -       +      -
     21A  LEU*     4.1    20.0    -      -       +      -
     22A  LEU*     3.6    22.6    -      -       +      +
     25A  PHE*     3.7    26.7    -      +       +      -
     26A  PHE*     3.5     8.0    -      -       +      -
    103A  LEU*     3.7    39.5    -      -       +      -
    132C  THR*     3.1    30.2    +      -       +      -
    133C  VAL      3.0     7.3    +      -       -      +
    135C  LEU*     1.4    94.2    -      -       +      +
    137C  LEU*     1.4    63.7    +      -       -      +
    139C  LEU*     3.9    14.3    -      -       +      +
    140C  GLN*     3.4    24.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 137 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     26A  PHE*     3.6    24.9    -      -       +      -
    133C  VAL*     2.9    26.2    +      -       +      +
    134C  GLU*     3.7    34.3    -      -       -      +
    135C  LEU      3.4     0.2    -      -       -      -
    136C  PHE*     1.4    75.5    -      -       -      +
    138C  THR*     1.3    59.9    +      -       -      +
    140C  GLN*     2.8    24.5    +      -       -      +
    141C  LEU*     3.7     2.3    +      -       -      +
    171C  GLY*     3.3    21.3    -      -       -      +
    174C  LEU*     3.9    14.8    -      -       +      -
    175C  GLY*     3.8    20.6    -      -       -      +
    179C  THR*     4.9     0.4    -      -       -      +
    181C  CYS*     3.9    13.7    -      -       -      -
    183C  MET*     3.5    20.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with THR 138 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     68C  ASN*     5.1     0.9    -      -       -      +
     70C  ALA*     4.1     9.9    -      -       +      -
     71C  VAL*     5.5     0.4    -      -       +      -
    134C  GLU      2.8    19.9    +      -       -      -
    135C  LEU      4.1     1.8    -      -       -      -
    136C  PHE      3.3     0.2    -      -       -      -
    137C  LEU*     1.3    74.0    -      -       -      +
    139C  LEU*     1.3    59.7    +      -       -      +
    140C  GLN      3.4     0.2    -      -       -      -
    141C  LEU*     3.3    10.8    +      -       +      +
    142C  VAL*     2.9    35.0    +      -       +      +
    183C  MET*     3.5    33.9    -      -       -      +
    208C  PRO*     3.3    34.9    -      -       +      +
    211C  GLY      4.2     2.0    -      -       -      -
    212C  ALA*     4.2     7.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 139 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18A  LEU*     4.6     9.6    -      -       +      -
     22A  LEU*     3.9    28.3    -      -       +      -
    135C  LEU*     2.9    25.1    +      -       +      +
    136C  PHE*     3.9    14.8    -      -       +      +
    137C  LEU      3.5     0.2    -      -       -      -
    138C  THR*     1.3    76.4    -      -       -      +
    140C  GLN*     1.4    54.5    +      -       -      +
    142C  VAL*     3.4     2.1    +      -       -      +
    143C  LEU*     2.9    49.8    +      -       +      +
    211C  GLY      3.4    11.6    +      -       -      +
    214C  LEU*     3.7    27.6    -      -       +      -
    215C  GLY*     3.6    25.7    -      -       -      +
    218C  LEU*     4.4     7.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 140 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     22A  LEU*     4.6    16.4    -      -       +      -
     26A  PHE*     3.6    17.7    -      -       +      -
     54A  THR*     3.4    18.7    -      -       +      +
     55A  LEU*     5.4     4.9    -      -       +      -
     58A  ALA*     5.2     0.5    -      -       -      +
    136C  PHE      3.4    16.4    +      -       -      +
    137C  LEU*     2.8    19.7    +      -       -      +
    139C  LEU*     1.4    75.2    -      -       -      +
    141C  LEU*     1.3    70.2    +      -       -      +
    143C  LEU*     3.5    11.7    +      -       -      +
    144C  CYS*     3.0    28.4    +      -       -      +
    167C  SER*     2.7    39.3    +      -       -      -
    170C  LEU*     3.6    14.2    -      -       +      +
    171C  GLY*     3.9    13.7    -      -       -      -
    183C  MET*     4.3     1.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 141 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     68C  ASN*     4.0    23.3    -      -       -      +
     71C  VAL*     4.1    12.1    -      -       +      -
    137C  LEU      3.7    11.0    +      -       -      +
    138C  THR*     3.3    11.4    +      -       +      +
    139C  LEU      3.3     0.6    -      -       -      -
    140C  GLN*     1.3    82.8    -      -       -      +
    142C  VAL*     1.3    58.2    +      -       -      +
    144C  CYS*     3.1     4.9    +      -       -      +
    145C  ILE*     2.9    51.0    +      -       +      +
    164C  ILE*     4.1     6.5    -      -       +      +
    167C  SER*     3.3    24.0    -      -       -      +
    168C  VAL*     3.8    30.1    -      -       +      +
    183C  MET*     4.6    17.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 142 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     71C  VAL*     4.4    16.8    -      -       +      -
     74C  ALA*     3.8     8.5    -      -       +      -
    138C  THR*     2.9    24.5    +      -       +      +
    139C  LEU      3.9     2.9    -      -       -      +
    141C  LEU*     1.3    72.8    -      -       +      +
    143C  LEU*     1.4    61.8    +      -       -      +
    145C  ILE*     3.4     6.0    +      -       -      +
    146C  PHE*     3.0    57.0    +      -       +      -
    212C  ALA*     3.5    44.4    -      -       +      +
    215C  GLY*     3.7     3.8    -      -       -      -
    216C  SER      3.6     9.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 143 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18A  LEU*     4.1    19.3    -      -       +      -
     22A  LEU*     4.2    11.0    -      -       +      -
     55A  LEU*     6.0     1.1    -      -       +      -
     58A  ALA*     3.8    17.4    -      -       +      +
     59A  LEU*     5.1     6.1    -      -       +      -
    139C  LEU*     2.9    43.6    +      -       +      +
    140C  GLN*     3.7     6.3    -      -       -      +
    141C  LEU      3.3     0.2    -      -       -      -
    142C  VAL*     1.4    76.8    -      -       -      +
    144C  CYS*     1.4    60.7    +      -       -      +
    146C  PHE*     3.9     3.8    -      -       -      +
    147C  ALA*     3.2    23.9    +      -       -      +
    215C  GLY*     3.3    33.0    -      -       -      +
    218C  LEU*     4.6     2.9    -      -       +      -
    219C  TYR*     4.2    18.4    -      -       +      +
    223C  LEU*     4.4    16.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with CYS 144 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     54A  THR*     3.9    20.6    -      -       +      +
     57A  GLN*     3.8    24.9    -      -       -      -
     58A  ALA*     3.9     8.5    -      -       +      +
    140C  GLN      3.0    18.5    +      -       -      +
    141C  LEU      3.1     4.5    +      -       -      +
    143C  LEU*     1.4    73.1    -      -       -      +
    145C  ILE*     1.4    59.8    +      -       +      +
    147C  ALA*     3.5     2.1    +      -       -      +
    148C  SER*     3.0    37.9    +      -       -      -
    163C  SER*     3.9    25.8    -      -       -      -
    164C  ILE*     4.4     3.8    -      -       -      -
    167C  SER*     4.0    10.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 145 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     66C  HIS      5.8     0.7    -      -       -      +
     71C  VAL*     3.7    41.3    -      -       +      -
     75C  CYS*     5.2    10.5    -      -       -      -
    141C  LEU*     2.9    42.6    +      -       +      +
    142C  VAL*     3.4     6.5    +      -       +      +
    144C  CYS*     1.4    70.9    -      -       -      +
    146C  PHE*     1.3    57.3    +      -       +      +
    148C  SER*     3.8     4.2    -      -       -      -
    149C  THR*     2.7    50.4    +      -       +      +
    164C  ILE*     3.9    31.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 146 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     74C  ALA*     3.7    18.2    -      -       +      -
     75C  CYS*     4.5     4.3    -      -       -      -
     77C  VAL      3.7     5.4    -      -       -      -
     78C  GLY      3.8    19.5    -      -       -      -
     79C  CYS*     4.3    12.1    -      -       -      -
    142C  VAL*     3.0    49.7    +      -       +      +
    143C  LEU      3.9     2.2    -      -       -      +
    145C  ILE*     1.3    81.5    -      -       +      +
    147C  ALA*     1.3    59.8    +      -       -      +
    149C  THR*     3.6     6.6    +      -       -      -
    150C  ASP*     3.4    22.3    +      -       -      +
    216C  SER*     3.4    31.0    -      -       -      -
    219C  TYR*     3.5    36.6    +      +       +      -
    220C  ASN*     3.1    24.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 147 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     57A  GLN      3.2    25.6    -      -       -      +
     58A  ALA*     3.5    25.6    -      -       -      +
     61A  HIS*     3.6     9.4    -      -       +      -
    143C  LEU      3.2     8.1    +      -       -      +
    144C  CYS      3.9     2.0    -      -       -      +
    146C  PHE*     1.3    76.8    -      -       -      +
    148C  SER*     1.3    62.4    +      -       -      +
    150C  ASP*     3.2     6.6    +      -       -      +
    153C  ARG*     3.2    29.0    -      -       -      +
    219C  TYR*     3.6    12.5    -      -       +      +
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Residues in contact with SER 148 (chain C). Click here for Legend to table.
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                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
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     57A  GLN*     2.9    33.4    +      -       -      +
    144C  CYS*     3.0    26.9    +      -       -      -
    145C  ILE      3.9     3.4    -      -       -      -
    146C  PHE      3.4     0.2    -      -       -      -
    147C  ALA*     1.3    74.3    -      -       -      +
    149C  THR*     1.3    61.4    +      -       -      +
    150C  ASP      3.5     1.9    +      -       -      +
    153C  ARG*     5.0     1.1    -      -       -      +
    158C  GLY      4.4     4.2    -      -       -      +
    159C  THR*     4.1     4.5    +      -       -      -
    160C  PRO*     3.3    33.8    -      -       -      +
    163C  SER*     4.2     1.4    -      -       -      -
    164C  ILE*     4.0    18.1    -      -       -      +
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Residues in contact with THR 149 (chain C). Click here for Legend to table.
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                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
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     64C  GLY      6.1     0.9    -      -       -      +
     79C  CYS*     5.2     8.7    -      -       -      -
    145C  ILE*     2.7    34.3    +      -       +      +
    146C  PHE*     3.7     8.1    +      -       -      -
    147C  ALA      3.2     0.4    -      -       -      -
    148C  SER*     1.3    80.0    -      -       -      +
    150C  ASP*     1.3    59.1    +      -       -      +
    151C  GLU      3.9     1.7    +      -       -      -
    159C  THR*     4.0    25.1    -      -       +      +
    164C  ILE*     4.9     3.1    -      -       +      -
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


   I  Hydrophilic      - N and O that can donate and accept hydrogen bonds
                         (e.g., oxygen of hydroxyl group of Ser. or Thr)
  II  Acceptor         - N or O that can only accept a hydrogen bond
 III  Donor            - N that can only donate a hydrogen bond
  IV  Hydrophobic      - Cl, Br, I and all C atoms that are not in
                         aromatic rings and do not have a covalent bond to
                         a N or O atom
   V  Aromatic         - C in aromatic rings irrespective of any other 
                         bonds formed by the atom
  VI  Neutral          - C atoms that have a covalent bond to at least one
                         atom of class I or two or more atoms from class II
                         or III; atoms; S, F, P, and metal atoms in all cases
 VII  Neutral-donor    - C atoms that have a covalent bond with only one
                         atom of class III
VIII  Neutral-acceptor - C atoms that have a covalent bond with only 
                         one atom of class II
For each pair of contacts the state of legitimacy is shown below:

Legend:
+, legitimate
-, illegitimate
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  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) +   -    +    +   +   +    +    -
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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