Contacts of the helix formed by residues 141 - 164 (chain E) in PDB entry 1F33


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 ASP 141 (chain E).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133C  ARG*     4.3    12.0    -      -       -      +
     21E  VAL*     4.7    10.1    -      -       +      +
     25E  GLU*     3.4     9.3    +      -       -      +
     29E  THR*     3.8    18.5    +      -       -      +
     83E  ARG*     2.7    34.8    +      -       -      -
     87E  LEU*     4.2     6.2    -      -       -      +
    139E  ALA*     4.4     1.1    -      -       -      +
    140E  LYS*     1.3    77.3    -      -       -      +
    142E  ASP*     1.3    69.5    +      -       -      +
    143E  ASP*     3.9     2.3    +      -       -      +
    144E  THR*     2.6    33.7    +      -       -      +
    145E  ALA*     2.9    21.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 142 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133C  ARG*     4.4     8.1    -      -       +      +
    136C  ILE*     3.8    41.1    -      -       +      +
    137C  GLY*     4.3     9.6    +      -       -      -
    149C  THR*     4.2     5.0    -      -       +      +
    140E  LYS      3.3     8.3    +      -       -      +
    141E  ASP*     1.3    72.8    +      -       -      +
    143E  ASP*     1.3    65.2    +      -       -      +
    145E  ALA*     3.0    10.5    +      -       -      +
    146E  ASP*     2.9    22.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 143 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133C  ARG*     4.0     3.5    -      -       -      -
    136C  ILE*     3.4     7.7    -      -       -      +
    149C  THR*     3.3    28.5    -      -       -      +
    152C  SER*     2.6    31.2    +      -       -      -
    153C  ARG*     3.7    18.5    +      -       -      +
    156C  ASP*     3.5     7.1    -      -       -      +
     83E  ARG*     3.3    35.0    +      -       -      +
    141E  ASP*     3.3     2.5    +      -       -      -
    142E  ASP*     1.3    78.5    -      -       -      +
    144E  THR*     1.3    57.6    +      -       -      +
    146E  ASP*     3.2     4.7    +      -       -      +
    147E  ILE*     3.0    32.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 144 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29E  THR*     3.1    22.5    -      -       +      +
     32E  LEU*     5.0     4.0    -      -       +      -
     33E  LEU*     3.5    28.9    -      -       +      -
     83E  ARG*     3.6     9.6    +      -       -      +
    139E  ALA*     4.3     7.9    -      -       +      -
    141E  ASP*     2.6    34.2    +      -       -      -
    143E  ASP*     1.3    75.2    -      -       -      +
    145E  ALA*     1.3    67.6    +      -       -      +
    147E  ILE*     3.2     9.6    +      -       -      +
    148E  LEU*     2.9    35.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 145 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    136E  ILE*     4.0    24.1    -      -       +      +
    139E  ALA*     4.0    15.4    -      -       +      +
    141E  ASP      2.9    12.3    +      -       -      +
    142E  ASP*     3.0    13.2    +      -       -      +
    144E  THR*     1.3    76.2    -      -       -      +
    146E  ASP*     1.3    54.2    +      -       -      +
    148E  LEU*     3.4     4.3    +      -       -      +
    149E  THR*     2.6    38.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 146 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    146B  ASP*     4.2     2.8    -      -       -      +
    146C  ASP*     4.3     1.0    -      -       -      +
    149C  THR*     3.7    21.4    -      -       +      +
    150C  ALA      5.2     0.5    +      -       -      -
    153C  ARG*     3.0    19.6    +      -       -      +
    603C  TRS      2.6    53.2    +      -       -      -
    142E  ASP      2.9    11.0    +      -       -      +
    143E  ASP      3.3     9.9    -      -       -      +
    145E  ALA*     1.3    74.6    -      -       -      +
    147E  ILE*     1.3    66.9    +      -       -      +
    149E  THR*     2.9     9.0    +      -       -      -
    150E  ALA*     2.9    22.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 147 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    153C  ARG*     3.5    35.9    -      -       +      +
     33E  LEU*     5.1     2.2    -      -       +      -
     76E  HIS*     4.7     4.0    +      -       -      +
     79E  THR*     3.8    24.2    -      -       +      +
     80E  MET*     3.6    31.4    -      -       +      -
     83E  ARG*     3.6    40.2    -      -       +      -
    143E  ASP      3.0    14.5    +      -       -      +
    144E  THR*     3.5     9.2    -      -       +      +
    146E  ASP*     1.3    77.5    -      -       -      +
    148E  LEU*     1.3    62.9    +      -       +      +
    150E  ALA*     3.3     4.6    +      -       -      +
    151E  ALA*     3.0    21.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 148 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     32E  LEU*     4.2     8.5    -      -       +      -
     33E  LEU*     4.6     7.2    -      -       +      -
     36E  GLN*     3.9    11.9    -      -       +      -
     80E  MET*     3.8    28.5    -      -       +      -
    132E  VAL*     3.9    20.0    -      -       +      +
    135E  ALA*     3.9    33.2    -      -       +      +
    136E  ILE*     3.9    14.0    -      -       +      +
    139E  ALA*     4.1     7.0    -      -       +      -
    144E  THR*     2.9    35.6    +      -       +      +
    145E  ALA      3.8     3.4    -      -       -      +
    147E  ILE*     1.3    73.6    -      -       -      +
    149E  THR*     1.3    60.8    +      -       -      +
    151E  ALA*     3.3     3.2    +      -       -      +
    152E  SER*     2.7    31.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with THR 149 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    142B  ASP*     4.3     4.8    -      -       +      +
    143B  ASP*     3.4    19.9    -      -       -      +
    146B  ASP*     3.6    37.7    -      -       +      +
    136E  ILE*     3.4    25.7    -      -       +      +
    145E  ALA      2.6    21.1    +      -       -      -
    146E  ASP*     2.9    10.8    +      -       -      -
    148E  LEU*     1.3    75.7    -      -       -      +
    150E  ALA*     1.3    57.2    +      -       -      +
    153E  ARG*     2.8    30.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 150 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    146B  ASP*     5.2     5.1    +      -       -      -
    153C  ARG*     4.9    10.5    -      -       -      +
    603C  TRS      5.2    12.6    -      -       -      +
     76E  HIS*     3.4    20.1    +      -       +      +
    146E  ASP      2.9    11.4    +      -       -      +
    147E  ILE*     3.6    10.8    -      -       -      +
    149E  THR*     1.3    79.2    -      -       -      +
    151E  ALA*     1.3    62.1    +      -       -      +
    153E  ARG*     3.5     8.1    -      -       -      +
    154E  ASP*     3.4    16.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 151 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     40E  PHE*     3.9    21.1    -      -       +      -
     76E  HIS*     3.4    33.1    -      -       +      +
     80E  MET*     4.9     5.6    -      -       -      -
    132E  VAL*     4.7     2.5    -      -       +      -
    147E  ILE*     3.0    16.1    +      -       +      +
    148E  LEU*     3.7     7.2    -      -       -      +
    150E  ALA*     1.3    75.1    -      -       -      +
    152E  SER*     1.3    65.6    +      -       -      +
    154E  ASP*     3.1     4.5    +      -       -      +
    155E  LEU*     3.0    28.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 152 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    143B  ASP*     2.5    33.6    +      -       -      -
    132E  VAL*     4.0    21.4    -      -       -      +
    133E  ARG*     3.7    19.2    -      -       -      +
    136E  ILE*     3.7     8.7    -      -       -      -
    148E  LEU      2.7    21.9    +      -       -      -
    149E  THR      3.5     0.2    -      -       -      -
    151E  ALA*     1.3    71.7    -      -       -      +
    153E  ARG*     1.3    65.5    +      -       -      +
    155E  LEU*     3.0     2.7    +      -       -      +
    156E  ASP*     2.9    28.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 153 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     79B  THR*     3.6    19.0    -      -       -      +
     83B  ARG*     5.2     2.6    +      -       -      +
     86B  GLN*     4.4     3.5    -      -       -      +
    143B  ASP*     3.7    26.6    +      -       +      +
    146B  ASP*     3.0    27.2    +      -       -      -
    147B  ILE*     3.4    45.3    -      -       +      +
    150B  ALA*     4.8     9.7    -      -       -      +
    603C  TRS      4.5     7.5    +      -       -      -
    149E  THR      2.8    17.6    +      -       -      +
    150E  ALA*     3.5     9.7    -      -       -      +
    152E  SER*     1.3    76.7    -      -       -      +
    154E  ASP*     1.3    63.2    +      -       -      +
    156E  ASP*     3.7     4.5    +      -       -      +
    157E  LYS*     3.4    18.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 154 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     72E  ALA*     4.2     8.3    -      -       -      +
     76E  HIS*     2.7    32.0    +      -       +      +
    150E  ALA      3.4     3.5    +      -       -      -
    151E  ALA      3.1     8.5    +      -       -      +
    152E  SER      3.1     0.8    -      -       -      -
    153E  ARG*     1.3    79.2    -      -       -      +
    155E  LEU*     1.3    61.6    +      -       +      +
    157E  LYS*     3.0    11.6    +      -       -      +
    158E  PHE*     2.8    59.1    +      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 155 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     40E  PHE*     3.2    38.4    -      -       +      -
     43E  LEU*     3.9    16.8    -      -       +      -
     73E  LEU*     4.2    14.4    -      -       +      -
     76E  HIS*     5.5     0.9    -      -       +      -
    125E  TYR*     4.2     9.7    -      -       +      +
    128E  VAL*     3.5    30.3    -      -       +      -
    129E  ALA*     3.8    26.8    -      -       +      +
    132E  VAL*     4.7     2.0    -      -       +      -
    151E  ALA*     3.0    24.8    +      -       +      +
    152E  SER*     3.0     5.1    +      -       -      +
    154E  ASP*     1.3    78.6    -      -       +      +
    156E  ASP*     1.3    58.0    +      -       -      +
    158E  PHE*     3.2     7.2    +      -       +      +
    159E  LEU*     2.8    30.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 156 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     19B  ASN*     3.4    15.8    +      -       -      +
     83B  ARG*     2.7    41.4    +      -       -      +
     86B  GLN*     3.7     9.1    -      -       +      +
    143B  ASP*     3.4     5.5    -      -       -      +
    129E  ALA*     3.7    12.0    -      -       -      +
    133E  ARG*     2.6    33.0    +      -       -      -
    152E  SER*     2.9    19.6    +      -       -      +
    153E  ARG      4.0     1.6    -      -       -      +
    155E  LEU*     1.3    76.5    -      -       -      +
    157E  LYS*     1.3    61.9    +      -       -      +
    159E  LEU*     3.8     6.2    -      -       -      +
    160E  TRP*     3.1    22.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 157 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     82B  GLU*     4.0    20.3    +      -       -      +
     86B  GLN*     3.8    17.9    +      -       -      +
    153E  ARG      3.4    11.6    +      -       -      +
    154E  ASP*     3.0    18.3    +      -       -      +
    156E  ASP*     1.3    77.6    -      -       -      +
    158E  PHE*     1.3    74.1    +      -       +      +
    160E  TRP*     3.2    17.1    +      -       +      +
    161E  PHE*     2.9    56.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 158 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     68E  GLY      5.6     0.4    -      -       -      -
     69E  PHE*     3.4    60.1    -      +       +      -
     72E  ALA*     3.5    33.4    -      -       +      -
     73E  LEU*     4.1    13.5    -      -       +      -
     76E  HIS*     5.7     0.2    -      +       -      -
    125E  TYR*     3.8    19.5    -      +       +      -
    154E  ASP*     2.8    45.7    +      -       +      +
    155E  LEU*     3.7     5.2    -      -       -      +
    157E  LYS*     1.3    90.2    -      -       +      +
    159E  LEU*     1.3    54.9    +      -       -      +
    161E  PHE*     3.0     2.3    +      +       -      +
    162E  ILE*     2.8    40.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 159 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     17B  THR*     4.5     1.8    -      -       -      +
     18B  ARG*     4.2     2.0    -      -       +      -
     19B  ASN*     3.8    39.7    -      -       +      +
    122E  ALA*     3.5    29.2    -      -       -      +
    125E  TYR*     4.2    10.0    -      -       +      -
    126E  ALA*     3.9    23.1    -      -       +      +
    129E  ALA*     4.4     9.6    -      -       +      -
    130E  ASN*     5.3     0.2    -      -       -      +
    155E  LEU      2.8    17.6    +      -       -      +
    156E  ASP*     3.8     5.8    -      -       -      +
    158E  PHE*     1.3    73.8    -      -       -      +
    160E  TRP*     1.3    58.3    +      -       -      +
    162E  ILE*     3.2     7.6    +      -       +      +
    163E  GLU*     2.9    56.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with TRP 160 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     52A  TRP*     3.9    20.6    +      -       -      -
     54A  MET      5.2     2.0    +      -       -      -
     55A  ARG*     4.1    14.8    -      -       -      +
     59A  PHE*     4.2    14.7    -      +       -      -
     63A  HIS*     3.9    13.0    -      +       -      -
     17B  THR*     5.8     0.9    -      -       -      -
     82B  GLU*     3.8    32.1    -      -       +      -
     85B  VAL*     3.3    30.8    -      -       +      +
     86B  GLN*     3.5    41.5    -      -       +      +
    156E  ASP      3.1    11.2    +      -       -      +
    157E  LYS*     3.3    10.1    -      -       +      +
    158E  PHE      3.1     0.2    -      -       -      -
    159E  LEU*     1.3    81.1    -      -       -      +
    161E  PHE*     1.3    86.6    +      +       -      +
    163E  GLU*     3.4     8.7    +      -       -      +
    164E  SER*     2.7    64.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 161 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     59A  PHE*     3.8    13.2    -      +       -      -
     60A  ILE*     3.5    29.6    -      -       +      -
     63A  HIS*     3.9    20.4    -      +       -      -
     64A  GLU*     4.9     4.3    -      -       +      -
     82B  GLU*     5.6     0.9    -      -       -      -
     65E  MET*     3.9     6.5    -      -       +      -
     69E  PHE*     3.7    29.8    -      +       +      -
    157E  LYS*     2.9    39.1    +      -       +      +
    158E  PHE      3.0     7.6    +      -       -      +
    160E  TRP*     1.3   111.3    -      +       -      +
    162E  ILE*     1.3    62.5    +      -       -      +
    164E  SER*     3.5     2.1    +      -       -      -
    165E  ASN*     2.7    34.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 162 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65E  MET*     4.4    10.5    -      -       +      -
     66E  LEU*     4.8     5.4    -      -       +      -
     69E  PHE*     3.7    14.8    -      -       +      -
    118E  LEU*     3.3    39.7    -      -       +      +
    121E  LEU*     4.2     9.4    -      -       +      +
    122E  ALA*     3.9    12.3    -      -       +      +
    125E  TYR*     3.5    54.1    -      -       +      -
    158E  PHE      2.8    18.7    +      -       -      +
    159E  LEU*     3.5     6.3    -      -       -      +
    161E  PHE*     1.3    71.6    -      -       -      +
    163E  GLU*     1.3    65.7    +      -       -      +
    165E  ASN*     3.0    18.2    +      -       -      +
    166E  ILE*     3.6     7.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 163 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     55A  ARG*     4.8    12.7    +      -       -      +
     16B  TYR*     4.3     2.6    -      -       -      +
     17B  THR*     2.8    31.3    +      -       -      -
     18B  ARG*     2.8    60.8    +      -       -      +
    122E  ALA*     4.3     4.3    -      -       +      -
    159E  LEU*     2.9    32.4    +      -       +      +
    160E  TRP*     3.8     7.0    -      -       -      +
    162E  ILE*     1.3    76.8    -      -       -      +
    164E  SER*     1.3    58.4    +      -       -      +
    166E  ILE*     2.9    37.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 164 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     55A  ARG*     3.7    22.6    +      -       -      +
     56A  GLY      2.8    26.2    +      -       -      -
     59A  PHE*     3.0    41.2    -      -       -      +
    160E  TRP*     2.7    50.7    +      -       -      -
    161E  PHE      3.9     0.7    -      -       -      -
    162E  ILE      3.2     0.4    -      -       -      -
    163E  GLU*     1.3    71.9    -      -       -      +
    165E  ASN*     1.3    57.0    +      -       -      +
    166E  ILE      3.4     0.4    -      -       -      -
----------------------------------------------------------
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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