Contacts of the helix formed by residues 129 - 153 (chain C) in PDB entry 2HYE


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 VAL 129 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    127C  ASP*     2.2    35.9    +      -       +      +
    128C  SER*     1.3    72.4    -      -       -      +
    130C  LEU*     1.3    72.6    +      -       +      +
    131C  PHE      3.8     2.0    -      -       -      +
    132C  LEU*     3.6    11.8    -      -       -      +
    133C  LYS*     3.2    38.5    +      -       -      +
    199C  LEU*     5.0    17.0    -      -       +      -
    213C  LEU*     5.0     4.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 130 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    125C  SER*     4.5    11.2    -      -       -      +
    127C  ASP*     2.6    38.4    +      -       +      +
    129C  VAL*     1.3    82.8    -      -       +      +
    131C  PHE*     1.3    66.6    +      -       -      +
    132C  LEU      2.8     1.9    +      -       -      -
    133C  LYS*     3.0    10.0    +      -       +      +
    134C  LYS*     2.7    41.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 131 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121C  PHE*     4.1    24.5    -      +       +      -
    125C  SER      5.8     1.1    +      -       -      +
    127C  ASP      3.4    10.6    +      -       -      +
    128C  SER*     4.3    11.7    -      -       -      +
    130C  LEU*     1.3    79.5    -      -       -      +
    132C  LEU*     1.3    64.1    +      -       +      +
    134C  LYS*     3.2    10.5    -      -       -      +
    135C  ILE*     3.1    36.0    +      -       +      +
    188C  VAL*     3.6    24.0    -      -       +      -
    191C  LYS*     3.4    62.8    -      -       +      -
    192C  THR*     3.2    23.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 132 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128C  SER*     3.8    17.3    -      -       -      +
    129C  VAL*     3.6    13.2    -      -       -      +
    130C  LEU      2.8     1.6    +      -       -      -
    131C  PHE*     1.3    82.2    -      -       +      +
    133C  LYS*     1.3    65.8    +      -       -      +
    134C  LYS      2.7     5.3    +      -       -      -
    135C  ILE*     2.8    16.0    +      -       -      +
    136C  ASN*     2.8    11.3    +      -       -      +
    191C  LYS      4.6     2.5    -      -       -      +
    192C  THR*     4.0    33.0    -      -       +      +
    195C  GLY*     3.7    22.4    -      -       -      +
    196C  ILE*     4.7     4.7    -      -       +      +
    199C  LEU*     4.0    15.9    -      -       +      -
    213C  LEU*     3.7    22.4    -      -       +      -
    214C  LEU*     6.3     1.1    -      -       +      -
    217C  LEU*     4.2    21.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 133 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    129C  VAL*     3.2    25.7    +      -       -      +
    130C  LEU*     3.0    11.7    +      -       +      +
    132C  LEU*     1.3    75.3    -      -       -      +
    134C  LYS*     1.3    65.1    +      -       -      +
    136C  ASN*     3.6     3.7    +      -       -      +
    137C  THR*     2.9    25.2    +      -       -      +
    210C  ASP*     4.9    15.5    -      -       -      +
    213C  LEU*     3.8    26.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 134 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121C  PHE*     3.5    21.3    -      -       +      -
    130C  LEU*     2.7    38.9    +      -       +      +
    131C  PHE*     3.2    14.6    -      -       -      +
    132C  LEU      2.7     0.2    +      -       -      -
    133C  LYS*     1.3    76.7    -      -       -      +
    135C  ILE*     1.3    57.7    +      -       -      +
    137C  THR*     3.0     3.8    +      -       -      -
    138C  CYS*     2.8    27.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 135 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121C  PHE*     3.6    27.6    -      -       +      -
    131C  PHE*     3.4    30.5    -      -       +      +
    132C  LEU*     2.8     5.6    +      -       -      +
    134C  LYS*     1.3    78.0    -      -       -      +
    136C  ASN*     1.3    61.6    +      -       -      +
    138C  CYS*     3.6     4.1    +      -       +      +
    139C  TRP*     3.2    20.8    +      -       -      +
    178C  PHE*     4.7     3.5    -      -       +      -
    182C  ILE*     4.9     8.5    -      -       +      +
    183C  ILE*     5.3     5.4    -      -       +      -
    188C  VAL*     3.2    35.9    -      -       +      -
    192C  THR*     3.6     7.9    -      -       +      +
    217C  LEU*     3.5    28.9    -      -       +      -
    220C  MET*     4.1    12.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 136 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132C  LEU      2.8    11.2    +      -       -      +
    133C  LYS*     3.6     9.8    +      -       -      +
    135C  ILE*     1.3    78.4    -      -       -      +
    137C  THR*     1.3    56.2    +      -       -      +
    139C  TRP*     2.8     8.7    +      -       -      +
    140C  GLN*     2.6    69.5    +      -       -      +
    213C  LEU*     4.1    22.6    -      -       +      +
    216C  SER*     2.7    32.6    +      -       -      -
    217C  LEU*     4.4    10.8    +      -       +      +
    220C  MET*     5.8     0.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with THR 137 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133C  LYS*     2.9    18.7    +      -       -      +
    134C  LYS*     3.7     2.7    -      -       -      -
    136C  ASN*     1.3    72.0    +      -       -      +
    138C  CYS*     1.3    63.2    +      -       -      +
    139C  TRP      2.9     6.8    +      -       -      -
    140C  GLN*     3.6    18.1    +      -       -      +
    141C  ASP*     3.1    41.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with CYS 138 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    117C  GLN*     4.1    22.4    -      -       -      +
    121C  PHE*     3.4    42.8    -      -       +      -
    134C  LYS      2.8     9.3    +      -       -      +
    135C  ILE*     3.7     5.4    -      -       -      +
    136C  ASN      3.1     0.2    -      -       -      -
    137C  THR*     1.3    77.4    -      -       -      +
    139C  TRP*     1.3    57.8    +      -       -      +
    141C  ASP*     4.4     2.6    -      -       -      +
    142C  HIS*     3.7    12.4    +      -       -      +
    178C  PHE*     3.4    14.7    -      -       -      -
    182C  ILE*     3.9    19.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with TRP 139 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    135C  ILE      3.2    12.2    +      -       -      +
    136C  ASN*     2.8    11.0    +      -       -      +
    138C  CYS*     1.3    78.8    -      -       -      +
    140C  GLN*     1.3    66.5    +      -       +      +
    141C  ASP      2.7    15.2    +      -       -      -
    142C  HIS*     3.2     6.6    +      -       -      +
    143C  CYS*     2.9    52.1    +      -       -      +
    171C  TRP*     5.3     7.6    -      +       -      -
    175C  LEU*     5.4     4.8    -      -       +      +
    178C  PHE*     3.1    43.4    -      +       +      +
    216C  SER*     4.7    13.5    -      -       -      -
    220C  MET*     3.5    42.2    -      -       +      +
    223C  ASP*     3.5    33.0    -      -       +      -
    224C  LEU*     4.8     7.4    -      -       +      +
----------------------------------------------------------
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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
----------------------------------------------------------
    136C  ASN*     2.6    53.6    +      -       -      +
    137C  THR*     3.6    17.5    +      -       -      +
    139C  TRP*     1.3    82.0    -      -       +      +
    141C  ASP*     1.3    65.9    +      -       -      +
    143C  CYS*     3.5     6.1    -      -       -      +
    144C  ARG*     3.5    21.6    +      -       -      +
    216C  SER*     4.2     8.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 141 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     76C  SER*     4.5     4.5    +      -       -      -
    137C  THR*     3.1    33.8    +      -       -      +
    138C  CYS*     4.9     2.2    -      -       -      -
    139C  TRP      2.7     5.5    +      -       -      -
    140C  GLN*     1.3    75.8    -      -       -      +
    142C  HIS*     1.3    54.9    +      -       -      +
    143C  CYS      2.5    15.7    +      -       -      -
    144C  ARG*     2.5    61.5    +      -       -      +
    145C  GLN*     2.8    24.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 142 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    113C  HIS*     6.3     0.7    -      -       -      -
    114C  VAL*     4.4    18.8    -      -       +      +
    138C  CYS      3.7    18.2    +      -       -      +
    139C  TRP*     3.2     7.9    +      -       -      +
    141C  ASP*     1.3    76.5    -      -       -      +
    143C  CYS*     1.3    73.6    +      -       -      +
    145C  GLN*     3.4    20.0    -      -       -      +
    146C  MET*     3.1    44.4    +      -       +      +
    174C  GLY*     3.4    34.4    +      -       -      -
    175C  LEU*     4.4    11.9    -      -       +      -
    178C  PHE*     3.6    32.4    +      +       +      +
----------------------------------------------------------
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Residues in contact with CYS 143 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    139C  TRP*     2.9    66.2    +      -       -      +
    140C  GLN*     3.5     8.5    -      -       -      +
    141C  ASP      2.5     4.8    +      -       -      -
    142C  HIS*     1.3    79.1    -      -       -      +
    144C  ARG*     1.3    57.6    +      -       -      +
    146C  MET*     2.8    23.8    +      -       -      +
    147C  ILE*     3.0    22.8    +      -       +      +
    171C  TRP*     4.8    15.7    +      -       +      -
    175C  LEU*     6.2     1.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 144 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     76C  SER*     3.9    17.4    +      -       -      -
    140C  GLN*     3.5     9.0    +      -       -      +
    141C  ASP*     2.5    65.1    +      -       -      +
    143C  CYS*     1.3    76.1    -      -       -      +
    145C  GLN*     1.3    63.0    +      -       -      +
    147C  ILE*     3.4    16.8    +      -       +      +
    148C  MET*     3.1    23.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 145 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     73C  VAL*     3.6    35.2    -      -       +      +
     74C  GLN*     3.7    19.5    -      -       -      +
     75C  SER      4.5     0.7    +      -       -      -
     76C  SER*     4.7     8.1    +      -       -      -
    113C  HIS*     3.3    32.6    +      -       -      -
    141C  ASP*     2.8    31.2    +      -       -      +
    142C  HIS*     3.4    22.7    -      -       -      +
    144C  ARG*     1.3    79.1    +      -       +      +
    146C  MET*     1.3    68.5    +      -       +      +
    147C  ILE      3.3     0.9    -      -       -      -
    148C  MET*     3.9     2.2    -      -       -      -
    149C  ILE*     3.4    25.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with MET 146 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     74C  GLN*     4.8     6.5    -      -       +      +
    110C  CYS*     3.6    28.0    -      -       +      -
    142C  HIS*     3.1    47.6    -      -       +      +
    143C  CYS*     2.8     5.1    +      -       -      +
    145C  GLN*     1.3    87.4    -      -       +      +
    147C  ILE*     1.3    61.8    -      -       -      +
    148C  MET      3.3     0.7    -      -       -      -
    149C  ILE*     3.4    36.4    -      -       +      +
    150C  ARG*     3.2    24.8    +      -       -      +
    170C  ILE*     4.8    10.6    -      -       +      +
    171C  TRP*     4.4    20.0    -      -       +      +
    173C  MET*     4.2    16.2    -      -       -      -
    174C  GLY*     4.4     8.5    -      -       -      -
    175C  LEU*     6.1     0.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 147 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    585A  GLU*     3.0    38.2    -      -       +      +
    143C  CYS*     3.0    25.8    -      -       +      +
    144C  ARG*     3.4    19.1    -      -       +      +
    146C  MET*     1.3    80.2    -      -       -      +
    148C  MET*     1.3    67.0    +      -       -      +
    150C  ARG*     3.7     4.0    +      -       -      +
    151C  SER*     3.3    19.4    +      -       -      -
    171C  TRP*     3.9    16.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with MET 148 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    561A  TRP*     5.8     0.2    -      -       -      -
    562A  THR*     5.7     2.9    -      -       -      +
     73C  VAL*     3.6    40.4    -      -       +      -
     79C  ILE*     5.8     6.3    -      -       +      -
     83C  LEU*     3.9    35.4    -      -       +      -
    144C  ARG      3.1    15.2    +      -       -      +
    145C  GLN*     4.1     0.9    -      -       -      +
    147C  ILE*     1.3    75.1    -      -       -      +
    149C  ILE*     1.3    67.3    +      -       -      +
    151C  SER*     2.2    32.9    +      -       -      -
    152C  ILE*     3.2     7.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 149 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     70C  VAL*     4.2    30.7    -      -       +      -
     73C  VAL*     4.4    13.0    -      -       +      -
     74C  GLN*     4.9     3.8    -      -       +      +
    106C  LEU*     3.9    20.9    -      -       +      -
    110C  CYS*     4.5     7.6    -      -       -      -
    145C  GLN      3.4    12.3    +      -       -      +
    146C  MET*     3.4    35.7    -      -       +      +
    147C  ILE      3.4     0.2    -      -       -      -
    148C  MET*     1.3    79.6    -      -       -      +
    150C  ARG*     1.3    68.1    +      -       -      +
    152C  ILE*     2.6    24.8    +      -       +      +
    153C  PHE*     2.9    28.5    +      -       +      -
    170C  ILE*     4.1    10.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 150 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    585A  GLU*     3.1    42.1    +      -       -      +
    586A  ILE*     4.6    15.2    -      -       -      +
    608A  ASP*     5.1     0.6    +      -       -      -
    146C  MET      3.2    17.7    +      -       -      +
    147C  ILE      3.8     3.6    -      -       -      +
    149C  ILE*     1.3    78.7    -      -       -      +
    151C  SER*     1.3    54.1    +      -       -      +
    153C  PHE      3.1     1.6    +      -       -      -
    154C  LEU*     2.6    51.3    +      -       +      +
    157C  ASP*     3.6    29.2    +      -       +      +
    158C  ARG*     4.5    22.6    -      -       -      +
    169C  SER*     4.4     7.3    +      -       -      -
    170C  ILE*     4.0    19.2    -      -       +      +
    171C  TRP*     4.1    24.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 151 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    561A  TRP*     3.5    32.3    -      -       -      -
    585A  GLU*     5.0    11.7    -      -       -      -
    587A  ILE*     5.4     8.7    -      -       -      +
     87C  TYR*     4.1     3.1    -      -       -      -
    147C  ILE      3.3     8.5    +      -       -      -
    148C  MET*     2.2    40.8    +      -       -      -
    149C  ILE      2.9     1.0    +      -       -      -
    150C  ARG*     1.3    79.2    -      -       -      +
    152C  ILE*     1.3    61.4    +      -       -      +
    154C  LEU*     3.6    18.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 152 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    561A  TRP*     4.4     5.6    -      -       +      -
     66C  LEU*     4.6     3.6    -      -       +      -
     69C  ALA*     4.4    11.2    -      -       +      -
     70C  VAL*     6.0     1.3    -      -       +      -
     73C  VAL*     5.0    13.7    -      -       +      -
     79C  ILE*     6.1     1.6    -      -       +      -
     83C  LEU*     3.7    29.4    -      -       +      +
     86C  LEU*     3.8    39.9    -      -       +      +
     87C  TYR*     3.5    19.1    -      -       -      +
     90C  VAL*     3.6    19.6    -      -       +      +
    148C  MET*     4.1     8.5    -      -       +      +
    149C  ILE*     2.6    18.5    +      -       +      +
    151C  SER*     1.3    77.8    +      -       -      +
    153C  PHE*     1.3    80.1    +      -       +      +
    154C  LEU      3.2     3.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 153 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     66C  LEU*     4.4    27.6    -      -       +      -
     69C  ALA*     6.4     0.2    -      -       +      -
     70C  VAL*     4.1    17.0    -      -       +      -
     90C  VAL*     4.0    19.3    -      -       +      -
    102C  LEU*     3.9    22.9    -      -       +      -
    106C  LEU*     3.6    36.6    -      -       +      -
    149C  ILE*     2.9    26.2    +      -       +      +
    150C  ARG      3.1     2.9    -      -       -      -
    152C  ILE*     1.3    93.0    -      -       +      +
    154C  LEU*     1.3    65.1    +      -       -      +
    155C  PHE      3.0     3.6    -      -       -      +
    156C  LEU*     2.7    29.7    +      -       +      +
    157C  ASP*     3.1     9.2    +      -       -      +
    170C  ILE*     3.6    18.8    -      -       +      -
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


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

Legend:
+, legitimate
-, illegitimate
------------------------------------------------------------
  Atomic class           I  II  III   IV   V   VI  VII  VIII
------------------------------------------------------------
   I  (Hydrophilic)      +   +    +    -   +   +    +    +
  II  (Acceptor)         +   -    +    -   +   +    +    -
 III  (Donor)            +   +    -    -   +   +    -    +
  IV  (Hydrophobic)      -   -    -    +   +   +    +    +
   V  (Aromatic)         +   +    +    +   +   +    +    +
  VI  (Neutral)          +   +    +    +   +   +    +    +
 VII  (Neutral-donor)    +   +    -    +   +   +    -    +
VIII  (Neutral-acceptor) +   -    +    +   +   +    +    -
------------------------------------------------------------
Warning!
Atom classes for heterogroups are automatically assigned based on the atomic coordinates. However, in three cases (see below) the automatic assignment is currently ambiguous. In these cases, the user is advised to manually analyse the full list of contacts using LPC software.
1. Carbon atoms belonging to a 4-, 5- or 6-member ring are 
   considered "aromatic" (Class V) if the ring is approximately
   planar, and "hydrophobic" (Class IV) or "neutral" (Classes
   VI, VII, VIII) if the ring is non-planar.
2. The oxygen atom of a carbonyl or hydroxy group is considered
   "hydroxy" (Class I) if the CO bond is longer than 1.29 Å, and
   "carbonyl" (Class II) if shorter.
3. All nitrogen atoms are considered "hydrophilic" (Class I).

Please E-mail any questions and/or suggestions concerning this page to Vladimir.Sobolev@weizmann.ac.il