Contacts of the helix formed by residues 132 - 155 (chain C) in PDB entry 1VEQ


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 LEU 132 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121B  ARG*     4.8     1.9    -      -       -      +
    124B  ILE*     4.6    18.6    -      -       +      -
    125B  GLU*     4.6    23.1    -      -       +      +
    128B  GLU*     4.7    17.3    -      -       -      +
    135B  GLN*     5.0     7.6    -      -       -      +
    139B  ILE*     4.5    21.2    -      -       +      +
    127C  LEU      5.0     0.7    -      -       -      -
    128C  GLU*     4.5    28.5    -      -       +      +
    130C  LEU      4.3     0.4    -      -       -      -
    131C  ASP*     1.3    71.8    +      -       -      +
    133C  VAL*     1.3    66.7    +      -       +      +
    135C  GLN*     3.0    40.4    +      -       -      +
    136C  ASP*     3.1    10.2    +      -       -      +
----------------------------------------------------------
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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
----------------------------------------------------------
    121B  ARG*     4.0     7.6    -      -       -      +
    124B  ILE*     5.1     7.0    -      -       +      -
    139B  ILE*     4.1    17.7    -      -       +      +
    142B  ALA*     3.9    14.8    -      -       +      -
    143B  GLY*     3.9    21.1    -      -       -      +
    146B  GLU*     3.8    19.1    -      -       -      +
     71C  ARG*     3.4    33.0    -      -       -      +
    131C  ASP*     3.2     8.5    +      -       -      +
    132C  LEU*     1.3    72.7    -      -       +      +
    134C  SER*     1.3    53.9    +      -       -      +
    135C  GLN      2.6    15.7    +      -       -      -
    136C  ASP*     3.2    12.5    +      -       -      +
    137C  LEU*     3.2    14.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 134 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     17C  VAL*     3.9    24.9    -      -       -      +
     21C  LEU*     4.8     7.1    -      -       -      +
     71C  ARG*     3.0    24.7    +      -       -      +
     75C  LEU*     4.8     1.6    -      -       -      +
    127C  LEU*     3.3    18.8    -      -       -      +
    131C  ASP*     2.6    34.6    +      -       -      -
    132C  LEU      3.4     0.4    -      -       -      -
    133C  VAL*     1.3    71.8    -      -       -      +
    135C  GLN*     1.3    58.5    +      -       -      +
    137C  LEU*     3.9    11.4    -      -       -      +
    138C  LEU*     3.6    16.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 135 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132A  LEU*     5.0     8.2    -      -       -      +
    124C  ILE*     3.4    39.7    +      -       +      +
    125C  GLU*     5.0     0.2    -      -       -      +
    127C  LEU*     4.3     9.4    -      -       +      -
    128C  GLU*     3.2    43.3    -      -       -      +
    131C  ASP      3.4    10.4    +      -       -      +
    132C  LEU*     3.0    27.0    -      -       -      +
    133C  VAL      2.6     7.1    +      -       -      -
    134C  SER*     1.3    74.2    -      -       -      +
    136C  ASP*     1.3    65.5    +      -       -      +
    137C  LEU      2.6     5.5    +      -       -      -
    138C  LEU*     2.7    14.0    +      -       -      +
    139C  ILE*     2.8    23.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 136 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    136A  ASP*     2.5    22.2    -      -       -      +
    136B  ASP*     2.4    33.2    -      -       -      +
    139B  ILE*     3.9    31.0    -      -       +      +
    140B  ALA*     5.2     6.9    +      -       -      +
    132C  LEU      3.1     4.9    +      -       -      +
    133C  VAL      3.2     1.5    +      -       -      +
    135C  GLN*     1.3    78.6    +      -       -      +
    137C  LEU*     1.3    63.8    +      -       -      +
    139C  ILE*     3.6    11.7    -      -       -      +
    140C  ALA*     3.1    23.0    +      -       -      +
----------------------------------------------------------
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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
----------------------------------------------------------
     21C  LEU*     6.0     0.4    -      -       +      -
     67C  GLU*     4.7    27.1    -      -       +      +
     68C  VAL*     4.5     9.2    -      -       +      +
     71C  ARG*     4.7    22.4    -      -       +      -
    133C  VAL*     3.2    17.9    +      -       +      +
    134C  SER*     3.9     8.7    -      -       -      +
    135C  GLN      2.6     0.8    +      -       -      -
    136C  ASP*     1.3    81.3    -      -       -      +
    138C  LEU*     1.3    78.9    +      -       +      +
    140C  ALA*     3.3     7.2    +      -       -      +
    141C  HIS*     3.1    49.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 138 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     21C  LEU*     4.1    21.8    -      -       +      -
     24C  GLN*     3.1    41.5    -      -       +      +
     28C  TYR*     3.9     8.7    -      -       -      +
     68C  VAL*     4.9     4.0    -      -       +      -
    120C  THR*     3.7    20.9    -      -       +      +
    123C  SER*     5.1     5.6    -      -       -      -
    124C  ILE*     4.1    15.3    -      -       +      -
    127C  LEU*     4.6    11.7    -      -       +      -
    134C  SER      3.6    13.4    +      -       -      +
    135C  GLN*     2.7    11.7    +      -       -      +
    137C  LEU*     1.3    93.9    -      -       +      +
    139C  ILE*     1.3    64.2    +      -       -      +
    141C  HIS*     3.3     8.6    +      -       +      +
    142C  ALA*     3.2    14.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 139 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132A  LEU*     4.4    25.1    -      -       +      +
    133A  VAL*     4.1    23.6    -      -       +      -
    136A  ASP*     4.1    26.7    -      -       +      +
    124C  ILE*     3.9    31.4    -      -       +      -
    135C  GLN*     2.8    35.4    +      -       +      +
    136C  ASP*     3.6    15.3    -      -       -      +
    138C  LEU*     1.3    68.7    -      -       -      +
    140C  ALA*     1.3    73.7    +      -       -      +
    142C  ALA*     2.6    23.3    +      -       -      +
    143C  GLY      3.2     2.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 140 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    136A  ASP*     5.4     6.5    +      -       -      +
     64C  TYR*     4.6     4.6    +      -       +      -
    136C  ASP*     3.1    11.6    +      -       -      +
    137C  LEU*     3.4    11.4    -      -       -      +
    139C  ILE*     1.3    81.8    -      -       -      +
    141C  HIS*     1.3    69.1    +      -       +      +
    143C  GLY*     3.1    14.5    +      -       -      -
    144C  GLU*     3.6     5.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 141 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     28C  TYR*     2.7    30.1    +      +       -      +
     64C  TYR*     3.1    51.3    -      +       +      -
     67C  GLU*     3.0    21.2    +      -       -      -
     68C  VAL*     4.0     6.1    -      -       +      -
    120C  THR*     5.8     0.9    -      -       +      -
    137C  LEU*     3.1    40.0    -      -       +      +
    138C  LEU*     3.4     9.3    -      -       +      +
    139C  ILE      2.8     4.0    +      -       -      -
    140C  ALA*     1.3    76.6    -      -       +      +
    142C  ALA*     1.3    63.7    +      -       -      +
    144C  GLU*     2.9     5.5    +      -       -      +
    145C  LEU*     2.8    39.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 142 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133A  VAL*     3.9    14.1    -      -       +      -
    117C  ILE*     5.6     2.9    -      -       +      -
    120C  THR*     4.5    10.9    -      -       +      +
    121C  ARG*     5.4     1.3    -      -       -      +
    124C  ILE*     4.5     9.0    -      -       +      -
    138C  LEU      3.2     6.4    +      -       -      +
    139C  ILE*     2.6    20.7    +      -       -      +
    141C  HIS*     1.3    73.4    -      -       -      +
    143C  GLY*     1.3    55.1    +      -       -      +
    145C  LEU*     3.0     8.0    +      -       -      -
    146C  GLU*     2.6    57.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 143 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     71A  ARG*     4.3     7.8    +      -       -      -
    133A  VAL*     3.9    20.6    -      -       -      +
    139C  ILE      3.2     2.8    +      -       -      -
    140C  ALA*     3.1    10.8    +      -       -      -
    142C  ALA*     1.3    79.0    -      -       -      +
    144C  GLU*     1.3    57.7    +      -       -      +
    146C  GLU*     4.1     1.7    -      -       -      +
    147C  LYS*     3.2    26.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 144 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     57C  GLN*     4.2     4.8    -      -       -      +
     60C  LEU*     3.5    27.2    -      -       +      +
     64C  TYR*     3.4    23.7    +      -       +      +
    140C  ALA      3.6     5.6    +      -       -      +
    141C  HIS      2.9     2.6    +      -       -      +
    143C  GLY*     1.3    74.2    -      -       -      +
    145C  LEU*     1.3    62.2    +      -       -      +
    147C  LYS*     3.6    21.9    +      -       +      +
    148C  PHE*     2.8    32.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 145 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     28C  TYR*     4.6     9.9    -      -       +      +
     31C  LEU*     4.0    18.4    -      -       +      -
     57C  GLN*     3.7    13.2    -      -       -      +
     61C  VAL*     4.6     3.8    -      -       +      -
     64C  TYR*     4.1    15.0    -      -       +      -
    113C  TYR*     3.6    33.1    -      -       +      -
    116C  VAL*     4.6    15.0    -      -       +      -
    117C  ILE*     4.5    13.0    -      -       +      -
    120C  THR*     5.7     4.0    -      -       +      +
    141C  HIS*     2.8    51.9    +      -       +      +
    142C  ALA*     3.6     7.4    -      -       -      +
    144C  GLU*     1.3    74.0    -      -       -      +
    146C  GLU*     1.3    64.2    +      -       -      +
    148C  PHE*     3.3     2.9    +      -       -      +
    149C  GLN*     3.0    17.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 146 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6A  ILE*     3.5    17.0    -      -       +      +
     71A  ARG*     2.9    37.9    +      -       -      +
     74A  THR*     3.5    14.4    -      -       +      +
    133A  VAL*     3.9     1.5    -      -       -      +
    117C  ILE*     3.5    33.7    -      -       +      +
    121C  ARG*     2.9    35.7    +      -       -      -
    142C  ALA*     2.6    37.7    +      -       -      +
    145C  LEU*     1.3    74.6    -      -       -      +
    147C  LYS*     1.3    61.9    +      -       -      +
    149C  GLN*     3.2     7.7    +      -       -      +
    150C  TRP      3.1    15.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 147 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     66A  ASP      5.1     0.4    +      -       -      -
     67A  GLU*     5.1    10.5    +      -       -      +
     70A  GLU*     2.7    46.8    +      -       -      +
     71A  ARG*     5.2     1.3    -      -       -      +
     74A  THR*     4.1    19.5    -      -       -      +
    143C  GLY      3.2    19.3    +      -       -      +
    144C  GLU*     3.6    23.9    +      -       +      +
    146C  GLU*     1.3    75.7    -      -       -      +
    148C  PHE*     1.3    67.9    +      -       -      +
    150C  TRP*     2.7    30.9    +      -       +      +
    151C  PHE*     3.2    25.6    +      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 148 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     35C  LEU*     4.1    11.9    -      -       +      -
     53C  MET*     4.1    32.3    -      -       +      -
     54C  ILE*     4.6     5.4    -      -       +      -
     57C  GLN*     3.0    51.8    -      -       +      +
    109C  LEU*     4.2     7.9    -      -       +      -
    113C  TYR*     3.4    38.1    -      +       -      -
    144C  GLU      2.8    15.6    +      -       -      +
    145C  LEU      3.7     1.1    -      -       -      +
    147C  LYS*     1.3    74.6    -      -       -      +
    149C  GLN*     1.3    65.4    +      -       -      +
    151C  PHE*     2.8    40.0    +      +       +      +
    152C  VAL*     3.0    29.0    +      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 149 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6A  ILE*     5.1     3.1    -      -       -      +
      7A  PRO*     4.0     5.6    -      -       -      +
     74A  THR*     5.8     2.1    -      -       -      +
    110C  ASP*     3.4    15.8    +      -       -      +
    113C  TYR*     3.5    23.9    -      -       +      +
    114C  ASN*     3.0    31.1    +      -       -      +
    117C  ILE*     3.5    18.7    -      -       +      +
    145C  LEU      3.0    12.4    +      -       -      +
    146C  GLU*     3.2    11.7    -      -       -      +
    148C  PHE*     1.3    78.3    -      -       -      +
    150C  TRP*     1.3    64.2    +      -       -      +
    152C  VAL*     2.8    23.5    +      -       +      +
    153C  ARG*     2.8    49.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with TRP 150 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      4A  PHE*     4.4    13.9    -      +       -      -
     70A  GLU*     4.3    33.9    -      -       +      -
     73A  ALA*     3.4    47.0    +      -       +      +
     74A  THR*     3.8    26.2    -      -       +      +
    146C  GLU      3.1     2.4    +      -       -      -
    147C  LYS*     2.7    21.9    +      -       +      +
    149C  GLN*     1.3    78.9    +      -       -      +
    151C  PHE*     1.3    84.5    +      +       -      -
    153C  ARG*     3.0     9.4    +      -       -      +
    154C  ALA*     2.6    46.8    +      -       +      +
    157C  GLU*     5.5     1.4    +      -       -      -
     39J  HIS      5.0     0.4    -      -       -      -
     40J  TRP*     3.7    19.7    -      -       -      -
     42J  VAL      5.3     1.6    -      -       -      -
     43J  VAL*     5.8     3.5    -      -       +      +
     47J  PHE*     4.2    17.0    -      +       -      -
     51J  HIS*     4.5     9.4    -      +       -      -
     99J  ARG*     4.8     5.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 151 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     70A  GLU*     4.9     1.3    -      -       -      -
     53C  MET*     4.0    21.3    -      -       +      -
    147C  LYS*     3.2    31.4    +      -       +      -
    148C  PHE*     2.8    38.2    +      +       +      +
    150C  TRP*     1.3    91.3    -      +       -      +
    152C  VAL*     1.3    64.7    +      -       -      +
    154C  ALA*     3.4     5.4    +      -       -      +
    155C  HIS*     2.9    23.3    +      -       -      -
     47J  PHE*     3.3    20.9    -      +       -      -
     48J  ILE*     4.2    11.2    -      -       +      -
     51J  HIS*     3.7    33.2    -      +       -      -
     52J  GLU*     6.2     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 152 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     53C  MET*     4.8     2.0    -      -       +      +
    106C  LEU*     3.1    58.6    -      -       +      +
    109C  LEU*     4.3     7.9    -      -       +      -
    110C  ASP*     4.2    12.6    -      -       +      +
    113C  TYR*     5.5     2.2    -      -       +      -
    148C  PHE*     3.3    43.5    -      -       +      +
    149C  GLN*     2.8    15.8    +      -       +      +
    151C  PHE*     1.3    75.8    -      -       -      +
    153C  ARG*     1.3    63.5    +      -       +      +
    155C  HIS*     3.1    19.2    +      -       -      +
    156C  LEU*     3.9     6.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 153 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      4A  PHE*     3.5    55.4    -      -       +      +
      5A  THR      3.6    23.8    +      -       -      -
      6A  ILE*     4.4     1.0    -      -       -      +
      7A  PRO*     4.2     2.6    -      -       -      +
     74A  THR      5.1     2.2    +      -       -      -
    110C  ASP*     2.8    33.5    +      -       +      +
    114C  ASN*     3.1    32.1    +      -       -      +
    149C  GLN*     2.8    42.8    +      -       -      +
    150C  TRP*     3.4    10.5    -      -       -      +
    152C  VAL*     1.3    69.9    -      -       +      +
    154C  ALA*     1.3    53.1    +      -       -      +
    155C  HIS      2.8     5.2    -      -       -      -
    156C  LEU*     2.6    37.9    +      -       +      +
    157C  GLU*     3.5    10.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 154 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    150C  TRP*     2.6    33.5    +      -       +      +
    151C  PHE      3.4     0.4    +      -       -      -
    153C  ARG*     1.3    70.9    -      -       -      +
    155C  HIS*     1.3    57.6    +      -       -      +
    156C  LEU      3.2     1.4    +      -       -      -
    157C  GLU*     4.0    10.0    +      -       -      -
     42J  VAL      4.7     0.2    -      -       -      +
     43J  VAL*     3.7    22.5    -      -       +      +
     44J  GLY      3.0    26.6    +      -       -      +
     47J  PHE*     3.8    35.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with HIS 155 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46C  ASN*     4.4     0.4    +      -       -      -
     49C  GLY*     6.0     0.4    -      -       -      -
     50C  VAL*     4.0    17.4    +      -       +      +
     53C  MET*     3.9     9.4    -      -       -      -
    103C  GLN*     4.0    10.0    +      -       -      +
    106C  LEU*     3.4    29.4    -      -       +      +
    151C  PHE      2.9    21.1    +      -       -      -
    152C  VAL*     3.1    12.0    +      -       -      +
    153C  ARG      2.8     1.2    +      -       -      -
    154C  ALA*     1.3    75.9    -      -       -      +
    156C  LEU*     1.3    63.6    +      -       -      +
    157C  GLU      3.8     0.4    -      -       -      -
     44J  GLY      2.9    17.2    -      -       -      +
     45J  PRO*     3.0    36.4    +      -       -      +
     46J  ASN*     4.8     0.6    -      -       -      -
     47J  PHE*     3.2    29.5    +      +       +      -
     48J  ILE*     3.5    30.3    +      -       +      +
----------------------------------------------------------
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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