Contacts of the helix formed by residues 120 - 148 (chain E) in PDB entry 2FJC


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 ILE 120 (chain E).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63B  ILE*     4.2    15.0    -      -       +      -
     60E  ILE*     4.1    22.4    -      -       +      -
     61E  TYR      3.3    23.6    +      -       -      +
     62E  GLY*     3.9     2.5    -      -       -      -
     64E  GLU*     3.2    30.7    -      -       +      +
     65E  PHE*     3.5    29.2    -      -       -      +
     68E  VAL*     3.7    22.2    -      -       +      -
    119E  THR*     1.3    70.7    -      -       -      +
    121E  VAL*     1.3    68.4    +      -       +      +
    123E  ALA*     3.2     2.3    +      -       -      +
    124E  LEU*     2.9    36.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 121 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63B  ILE*     4.3    24.2    -      -       +      -
    119E  THR*     3.8    12.6    -      -       +      +
    120E  ILE*     1.3    78.5    -      -       +      +
    122E  SER*     1.3    62.6    +      -       -      +
    124E  LEU*     4.6     0.7    -      -       -      -
    125E  ALA*     2.9    30.8    +      -       -      +
    174E  THR      6.0     0.2    -      -       -      +
    175E  LEU*     3.7    22.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 122 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    118E  ILE*     3.9    11.0    -      -       -      -
    119E  THR*     2.9    21.8    +      -       -      -
    121E  VAL*     1.3    85.5    -      -       -      +
    123E  ALA*     1.3    61.4    +      -       -      +
    125E  ALA*     3.4     5.9    +      -       -      +
    126E  ARG*     3.1    51.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 123 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     56E  TYR*     3.8    25.4    -      -       +      -
     60E  ILE*     3.6    25.4    -      -       +      -
     68E  VAL*     5.9     0.2    -      -       +      -
     72E  LEU*     5.5     1.1    -      -       +      -
    118E  ILE*     3.7    11.1    -      -       +      +
    119E  THR      2.9    17.9    +      -       -      +
    120E  ILE      3.7     2.2    -      -       -      +
    122E  SER*     1.3    77.2    -      -       -      +
    124E  LEU*     1.3    65.8    +      -       +      +
    126E  ARG*     3.1     4.5    +      -       -      +
    127E  VAL*     3.0    28.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 124 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63B  ILE*     4.7     5.8    -      -       +      -
     68E  VAL*     3.8    27.4    -      -       +      -
     71E  LEU*     4.4    10.1    -      -       +      -
     72E  LEU*     4.4    15.9    -      -       +      -
    120E  ILE*     2.9    37.3    +      -       +      +
    123E  ALA*     1.3    76.3    -      -       +      +
    125E  ALA*     1.3    62.9    +      -       -      +
    127E  VAL*     3.2     9.1    +      -       +      +
    128E  LYS*     2.9    25.1    +      -       -      +
    171E  LEU*     3.9    22.0    -      -       +      +
    174E  THR*     3.8    21.5    -      -       +      +
    175E  LEU*     3.8    20.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 125 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121E  VAL      2.9    19.3    +      -       -      +
    122E  SER*     3.7     7.0    -      -       -      +
    123E  ALA      3.2     0.2    -      -       -      -
    124E  LEU*     1.3    76.1    -      -       -      +
    126E  ARG*     1.3    57.4    +      -       -      +
    128E  LYS*     3.4     4.2    +      -       -      +
    129E  ARG*     3.0    40.4    +      -       -      +
    175E  LEU*     3.5    18.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 126 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     52E  LYS*     5.3     3.6    -      -       -      +
     56E  TYR*     3.3    24.9    -      -       -      +
    113E  GLU*     2.7    39.8    +      -       -      -
    115E  GLU*     3.4    25.2    +      -       -      -
    118E  ILE*     3.3    20.2    -      -       -      +
    122E  SER*     3.1    30.8    +      -       -      +
    123E  ALA      3.1     6.8    +      -       -      +
    125E  ALA*     1.3    75.2    -      -       -      +
    127E  VAL*     1.3    65.8    +      -       -      +
    129E  ARG*     3.2    32.3    +      -       -      +
    130E  ASP*     3.0    27.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 127 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     49E  LEU*     5.6     2.0    -      -       +      -
     53E  LEU*     3.8    22.2    -      -       +      -
     56E  TYR*     3.5    25.6    -      -       +      -
     72E  LEU*     4.5     8.7    -      -       +      -
     75E  TYR*     4.3    11.9    -      -       +      -
    123E  ALA      3.0    16.2    +      -       -      +
    124E  LEU*     3.3    15.9    -      -       +      +
    126E  ARG*     1.3    75.8    -      -       -      +
    128E  LYS*     1.3    61.1    +      -       -      +
    130E  ASP*     3.1     7.4    +      -       -      +
    131E  PHE*     2.7    40.3    +      -       +      -
    171E  LEU*     3.3    23.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 128 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    124E  LEU      2.9    18.3    +      -       -      +
    125E  ALA*     3.6     6.3    -      -       -      +
    127E  VAL*     1.3    78.8    -      -       -      +
    129E  ARG*     1.3    56.3    +      -       -      +
    131E  PHE*     3.3     4.1    +      -       -      +
    132E  GLU*     2.9    64.7    +      -       +      +
    168E  ILE*     3.7    15.2    -      -       +      +
    171E  LEU*     3.7    22.2    -      -       +      -
    172E  GLY*     3.5    37.0    -      -       -      +
    175E  LEU*     4.2    11.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 129 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    125E  ALA*     3.0    21.3    +      -       -      +
    126E  ARG*     3.4    43.3    -      -       -      +
    127E  VAL      3.2     0.2    -      -       -      -
    128E  LYS*     1.3    77.9    -      -       -      +
    130E  ASP*     1.3    59.7    +      -       -      +
    132E  GLU*     3.2    15.4    +      -       -      +
    133E  TYR*     2.9    28.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 130 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     49E  LEU*     4.2    20.3    -      -       +      +
     52E  LYS*     2.7    44.0    +      -       -      +
     56E  TYR*     5.4     0.3    -      -       -      -
    110E  ILE*     3.8    19.6    -      -       +      +
    111E  ALA      5.5     0.3    +      -       -      -
    126E  ARG      3.0    16.1    +      -       -      +
    127E  VAL*     3.1     9.4    +      -       -      +
    129E  ARG*     1.3    76.4    -      -       -      +
    131E  PHE*     1.3    60.8    -      -       -      +
    133E  TYR*     3.3     9.5    +      -       -      +
    134E  LEU*     2.9    32.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 131 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     49E  LEU*     3.7    29.6    -      -       +      -
     53E  LEU*     4.8     3.6    -      -       +      -
     75E  TYR*     3.8    46.0    -      +       +      -
     79E  VAL*     4.5     9.9    -      -       +      -
    127E  VAL*     2.7    24.4    +      -       +      +
    128E  LYS      3.5     5.2    -      -       -      +
    130E  ASP*     1.3    74.1    -      -       +      +
    132E  GLU*     1.3    57.4    +      -       -      +
    134E  LEU*     3.3     4.1    +      -       +      +
    135E  SER*     2.8    28.6    +      -       -      -
    164E  LEU*     3.8    24.3    -      -       +      +
    167E  ALA*     3.8    28.7    -      -       +      -
    168E  ILE*     3.6    17.6    -      -       +      +
    171E  LEU*     3.8    18.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 132 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128E  LYS*     2.9    53.0    +      -       -      +
    129E  ARG*     3.6    18.1    -      -       -      +
    131E  PHE*     1.3    74.3    -      -       -      +
    133E  TYR*     1.3    65.8    +      -       -      +
    135E  SER*     3.1     3.9    +      -       -      -
    136E  THR*     3.0    29.7    +      -       +      +
    168E  ILE*     3.8    28.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 133 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41E  GLN*     4.1     8.5    +      -       -      -
     45E  ASP*     3.2    28.3    +      -       -      -
    109E  GLY*     3.4    30.1    +      -       -      -
    110E  ILE*     3.7    28.7    -      -       +      -
    129E  ARG      2.9    13.8    +      -       -      +
    130E  ASP*     3.6    10.5    -      -       -      +
    131E  PHE      3.3     0.2    -      -       -      -
    132E  GLU*     1.3    76.3    -      -       -      +
    134E  LEU*     1.3    69.2    +      -       +      +
    136E  THR*     3.0    24.5    +      -       -      -
    137E  ARG*     3.0    41.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 134 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     42E  HIS*     5.2     3.4    -      -       -      +
     45E  ASP*     3.7    33.7    -      -       +      +
     46E  LEU*     3.6    21.8    -      -       +      -
     49E  LEU*     3.5    31.6    -      -       +      -
     79E  VAL*     5.6     0.9    -      -       +      -
    110E  ILE*     4.3     7.6    -      -       +      -
    130E  ASP      2.9    17.8    +      -       -      +
    131E  PHE*     3.6     9.9    -      -       +      +
    133E  TYR*     1.3    78.9    -      -       +      +
    135E  SER*     1.3    52.9    +      -       -      +
    137E  ARG*     3.2     5.9    +      -       +      +
    138E  PHE*     2.7    66.1    +      -       +      -
    164E  LEU*     4.0     8.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 135 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    131E  PHE      2.8    14.5    +      -       -      -
    132E  GLU*     3.1     9.8    +      -       -      -
    134E  LEU*     1.3    76.7    -      -       -      +
    136E  THR*     1.3    57.9    +      -       -      +
    139E  SER*     2.9    35.2    +      -       -      -
    161E  LEU*     3.6    14.5    +      -       -      +
    164E  LEU*     3.9    14.4    -      -       -      +
    165E  GLY*     5.7     1.4    +      -       -      -
    168E  ILE*     4.0    17.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 136 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132E  GLU*     3.0    15.3    +      -       +      +
    133E  TYR*     3.0    15.9    +      -       -      -
    135E  SER*     1.3    75.5    -      -       -      +
    137E  ARG*     1.3    72.2    +      -       -      +
    139E  SER*     3.3     7.9    +      -       -      -
    140E  GLN*     3.2    30.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 137 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     38E  GLN*     2.8    41.8    +      -       -      +
     41E  GLN*     2.8    30.2    +      -       +      -
     42E  HIS*     3.7    15.2    -      -       +      +
     45E  ASP*     4.9     2.5    -      -       -      +
    133E  TYR*     3.0    52.4    +      -       +      +
    134E  LEU*     3.5     9.0    -      -       +      +
    136E  THR*     1.3    85.8    +      -       -      +
    138E  PHE*     1.3    61.8    +      -       -      +
    140E  GLN*     2.6    44.7    +      -       -      +
    141E  THR*     3.4     8.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 138 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     42E  HIS*     3.3    38.4    -      +       +      -
     46E  LEU*     3.9    21.1    -      -       +      -
     86E  ILE*     3.4    25.4    -      -       +      -
    134E  LEU*     2.7    48.1    +      -       +      +
    137E  ARG*     1.3    70.4    -      -       -      +
    139E  SER*     1.3    61.6    +      -       -      +
    141E  THR*     3.0     3.6    +      -       -      -
    142E  GLN      2.9    23.9    +      -       -      -
    157E  ILE*     3.3    26.6    -      -       +      +
    160E  ILE*     3.9    19.7    -      -       +      -
    161E  LEU*     3.4    17.7    -      -       +      -
    164E  LEU*     3.5    28.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 139 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    135E  SER*     2.9    24.7    +      -       -      -
    136E  THR*     3.5     8.5    -      -       -      -
    137E  ARG      3.3     0.2    -      -       -      -
    138E  PHE*     1.3    76.6    -      -       -      +
    140E  GLN*     1.3    62.8    +      -       -      +
    142E  GLN*     3.2     5.9    +      -       -      +
    143E  VAL*     2.9    30.5    +      -       -      +
    161E  LEU*     4.0    19.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 140 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     38E  GLN*     3.7     9.8    +      -       -      +
    136E  THR*     3.2    18.4    +      -       -      +
    137E  ARG*     2.6    48.8    +      -       -      +
    138E  PHE      3.2     0.4    -      -       -      -
    139E  SER*     1.3    77.0    -      -       -      +
    141E  THR*     1.3    58.7    +      -       -      +
    143E  VAL*     3.2     8.5    +      -       -      +
    144E  LEU*     3.0    34.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 141 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     35E  ILE*     4.5     8.1    -      -       +      -
     38E  GLN*     3.0    24.7    +      -       +      +
     39E  LEU*     3.8    28.0    -      -       +      -
     42E  HIS*     2.6    27.3    +      -       -      +
    137E  ARG      3.4     0.2    +      -       -      -
    138E  PHE      3.0     9.3    +      -       -      -
    140E  GLN*     1.3    76.5    -      -       -      +
    142E  GLN*     1.3    59.4    +      -       -      +
    144E  LEU*     3.1     8.7    +      -       -      +
    145E  ALA*     2.8    27.5    +      -       -      +
    153E  THR*     4.4     7.9    -      -       +      -
    157E  ILE*     4.1    13.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 142 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    149C  GLY*     4.2    16.2    +      -       -      +
    151C  ALA*     3.6    31.1    -      -       +      +
    138E  PHE      2.9     7.8    +      -       -      +
    139E  SER*     3.2     9.4    +      -       -      +
    141E  THR*     1.3    77.1    -      -       -      +
    143E  VAL*     1.3    75.0    +      -       +      +
    145E  ALA*     3.8     6.4    -      -       -      +
    146E  ALA*     2.8    33.2    +      -       -      +
    154E  ASP*     2.9    33.9    -      -       -      +
    157E  ILE*     3.6    26.6    -      -       +      +
    158E  THR*     4.5     2.0    -      -       -      +
    161E  LEU*     4.2     8.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 143 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    149C  GLY*     5.6     7.2    -      -       -      +
    139E  SER*     2.9    21.6    +      -       -      +
    140E  GLN*     3.5    10.8    -      -       -      +
    142E  GLN*     1.3    93.6    -      -       +      +
    144E  LEU*     1.3    65.7    +      -       +      +
    146E  ALA*     3.3     2.2    +      -       -      +
    147E  GLU*     2.9    55.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 144 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     31E  ALA*     5.6     0.2    -      -       -      +
     34E  ALA*     4.1    29.8    -      -       +      +
     35E  ILE*     4.0    12.8    -      -       +      +
     38E  GLN*     4.1    26.5    -      -       +      -
    140E  GLN*     3.0    20.2    +      -       +      +
    141E  THR*     3.5     7.9    -      -       -      +
    143E  VAL*     1.3    80.9    -      -       +      +
    145E  ALA*     1.3    62.4    +      -       -      +
    147E  GLU*     3.4    11.5    +      -       -      +
    148E  SER*     3.0    27.5    +      -       -      -
----------------------------------------------------------
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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
----------------------------------------------------------
     35E  ILE*     3.7     7.6    -      -       +      +
    141E  THR      2.8    20.5    +      -       -      +
    142E  GLN*     3.8     4.0    -      -       -      +
    144E  LEU*     1.3    72.8    -      -       -      +
    146E  ALA*     1.3    63.3    +      -       -      +
    148E  SER*     3.7     6.1    -      -       -      -
    149E  GLY      3.1     4.0    +      -       -      -
    150E  ASP*     2.8    50.6    +      -       +      +
    153E  THR*     4.0    12.3    -      -       +      -
    154E  ASP*     3.8    17.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 146 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    142E  GLN*     2.8    30.9    +      -       -      +
    143E  VAL*     3.7     4.3    -      -       -      +
    145E  ALA*     1.3    78.4    -      -       -      +
    147E  GLU*     1.3    63.2    +      -       +      +
    149E  GLY*     3.4    11.1    +      -       -      -
    154E  ASP*     3.5    20.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 147 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    143E  VAL*     2.9    41.2    +      -       +      +
    144E  LEU*     4.0    10.9    -      -       -      +
    146E  ALA*     1.3    78.2    -      -       +      +
    148E  SER*     1.3    59.3    +      -       -      +
    149E  GLY      3.7     0.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 148 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     28E  ASP*     5.7     2.6    -      -       -      +
     31E  ALA*     3.6    29.1    -      -       -      +
     35E  ILE*     3.5    17.3    -      -       -      +
    144E  LEU      3.0    17.7    +      -       -      -
    145E  ALA      3.4     6.1    +      -       -      -
    147E  GLU*     1.3    76.6    -      -       -      +
    149E  GLY*     1.3    60.3    +      -       -      +
    150E  ASP*     3.4     5.2    +      -       -      +
----------------------------------------------------------
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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