Contacts of the helix formed by residues 133 - 159 (chain E) in PDB entry 3V5I


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 ALA 133 (chain E).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    131E  GLY      3.9     0.6    +      -       -      -
    132E  GLN*     1.3    71.4    -      -       -      +
    134E  THR*     1.3    64.1    +      -       -      +
    136E  ILE*     3.3    11.0    +      -       -      +
    137E  GLU*     3.0    24.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 134 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132E  GLN*     3.2     4.2    -      -       -      +
    133E  ALA*     1.3    78.0    -      -       -      +
    135E  GLU*     1.3    62.4    +      -       -      +
    137E  GLU*     3.4    15.8    +      -       -      +
    138E  ILE*     3.1    30.5    +      -       +      +
    171F  ARG*     3.8    39.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 135 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    129E  ALA*     5.0     0.8    -      -       -      +
    130E  GLN      4.4    10.8    -      -       -      +
    131E  GLY*     3.5     7.7    -      -       -      -
    132E  GLN*     2.8    41.8    +      -       +      +
    134E  THR*     1.3    73.8    -      -       -      +
    136E  ILE*     1.3    65.6    +      -       -      +
    138E  ILE*     3.4     9.8    +      -       +      +
    139E  ALA*     3.2    21.3    +      -       -      +
    171F  ARG*     3.7    30.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 136 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    129E  ALA*     4.1    36.8    -      -       +      +
    130E  GLN      4.4     1.1    -      -       -      -
    131E  GLY      3.3    30.3    -      -       -      +
    132E  GLN      2.9    16.5    +      -       -      +
    133E  ALA*     3.8     9.4    -      -       -      +
    135E  GLU*     1.3    69.0    -      -       -      +
    137E  GLU*     1.3    61.3    +      -       -      +
    139E  ALA*     3.2     3.3    +      -       -      +
    140E  ALA*     2.8    32.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 137 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133E  ALA      3.0    12.9    +      -       -      +
    134E  THR*     3.5    18.6    +      -       -      +
    136E  ILE*     1.3    78.5    -      -       -      +
    138E  ILE*     1.3    65.0    +      -       +      +
    140E  ALA*     3.2     7.0    +      -       +      +
    141E  ASN*     2.9    45.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 138 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    134E  THR*     3.1    27.9    +      -       +      +
    135E  GLU*     3.7     9.6    -      -       +      +
    136E  ILE      3.3     0.2    -      -       -      -
    137E  GLU*     1.3    80.1    -      -       +      +
    139E  ALA*     1.3    61.6    +      -       -      +
    141E  ASN*     3.2     8.7    +      -       -      +
    142E  HIS*     3.0    22.0    +      -       -      +
    171F  ARG*     3.8    31.2    -      -       +      -
    172F  ASP*     3.8    33.2    -      -       +      +
    174F  PHE*     4.3    14.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 139 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128E  GLY      4.3     7.0    -      -       -      +
    129E  ALA*     3.5    31.6    -      -       +      -
    135E  GLU      3.2    10.7    +      -       -      +
    136E  ILE      3.2     2.7    +      -       -      +
    138E  ILE*     1.3    74.1    -      -       -      +
    140E  ALA*     1.3    66.0    +      -       -      +
    142E  HIS*     3.3     7.8    +      -       -      +
    143E  ILE*     2.9    25.4    +      -       -      +
    174F  PHE*     5.7     2.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 140 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    129E  ALA*     5.4     0.4    -      -       -      +
    136E  ILE*     2.8    24.7    +      -       +      +
    137E  GLU*     3.2     8.3    +      -       -      +
    139E  ALA*     1.3    72.4    -      -       -      +
    141E  ASN*     1.3    65.8    +      -       -      +
    143E  ILE*     3.3     9.2    +      -       -      +
    144E  LEU*     3.0    37.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 141 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    137E  GLU*     2.9    39.8    +      -       -      +
    138E  ILE*     3.7     8.5    -      -       -      +
    140E  ALA*     1.3    79.2    -      -       -      +
    142E  HIS*     1.3    58.3    +      -       -      +
    144E  LEU*     3.4    11.8    +      -       -      +
    145E  LYS*     2.9    31.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 142 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     72E  THR*     6.0     1.3    -      -       +      -
    138E  ILE      3.0    16.3    +      -       -      +
    139E  ALA*     3.6     5.9    +      -       -      +
    140E  ALA      3.3     0.2    -      -       -      -
    141E  ASN*     1.3    75.7    -      -       -      +
    143E  ILE*     1.3    62.6    +      -       -      +
    145E  LYS*     3.3     8.0    +      -       +      +
    146E  THR*     2.9    41.9    +      -       -      -
     95F  MET*     4.6     3.4    -      -       +      -
    119F  GLU*     3.1    34.6    +      -       -      -
    174F  PHE*     3.6    58.4    -      +       +      -
----------------------------------------------------------
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Residues in contact with ILE 143 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    125E  PRO*     3.9    24.6    -      -       +      +
    126E  LEU      3.6    10.1    -      -       -      +
    127E  GLY*     3.6    34.1    -      -       -      +
    128E  GLY      5.2     0.4    -      -       -      +
    139E  ALA      2.9    15.7    +      -       -      +
    140E  ALA*     3.5    14.6    -      -       -      +
    142E  HIS*     1.3    80.1    +      -       -      +
    144E  LEU*     1.3    68.0    +      -       +      +
    146E  THR*     3.3     8.0    +      -       -      -
    147E  ARG*     3.0    26.5    +      -       -      +
----------------------------------------------------------
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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
----------------------------------------------------------
    124E  GLN*     6.3     1.1    -      -       -      +
    140E  ALA*     3.0    28.9    +      -       +      +
    141E  ASN*     3.8    11.9    -      -       -      +
    143E  ILE*     1.3    80.5    -      -       +      +
    145E  LYS*     1.3    63.2    +      -       -      +
    147E  ARG*     3.2    17.0    +      -       +      +
    148E  GLU*     3.1    30.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 145 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    141E  ASN      2.9    18.3    +      -       -      +
    142E  HIS*     3.7    10.1    -      -       +      +
    143E  ILE      3.3     0.2    -      -       -      -
    144E  LEU*     1.3    77.2    -      -       -      +
    146E  THR*     1.3    60.8    +      -       -      +
    148E  GLU*     3.3    17.3    +      -       +      +
    149E  LYS*     3.1    23.1    +      -       -      +
    174F  PHE      5.9     0.6    +      -       -      -
    176F  THR*     4.0    25.4    -      -       +      +
    179F  GLU*     4.1    15.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with THR 146 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     71E  VAL*     3.6    33.9    -      -       +      -
     75E  PHE*     5.2     3.6    -      -       +      -
    125E  PRO*     4.9     5.4    -      -       +      -
    142E  HIS*     2.9    30.5    +      -       -      -
    143E  ILE*     3.3    10.5    +      -       +      -
    145E  LYS*     1.3    73.3    -      -       -      +
    147E  ARG*     1.3    59.8    +      -       -      +
    149E  LYS*     3.3     8.3    +      -       -      +
    150E  LEU*     2.9    34.4    +      -       +      +
    119F  GLU*     3.7    20.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 147 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    124E  GLN*     3.5    36.5    +      -       -      +
    125E  PRO*     3.7    23.1    -      -       +      +
    143E  ILE      3.0    12.8    +      -       -      +
    144E  LEU*     3.2    19.6    +      -       +      +
    146E  THR*     1.3    73.6    -      -       -      +
    148E  GLU*     1.3    59.8    +      -       -      +
    150E  LEU*     3.1     4.4    +      -       +      +
    151E  ASN*     2.8    46.1    +      -       -      +
    166E  GLN*     3.0    62.8    +      -       -      +
    169E  THR*     3.1    29.9    +      -       -      -
    170E  ASP*     3.7    10.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 148 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    144E  LEU*     3.1    17.1    +      -       -      +
    145E  LYS*     3.5    20.1    -      -       -      +
    147E  ARG*     1.3    74.4    -      -       +      +
    149E  LYS*     1.3    59.1    +      -       -      +
    151E  ASN*     3.3     6.0    +      -       -      +
    152E  ARG*     2.8    36.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 149 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     75E  PHE*     3.5    36.4    -      -       +      -
    145E  LYS      3.1    10.8    +      -       -      +
    146E  THR*     3.5    13.0    -      -       -      +
    148E  GLU*     1.3    79.2    -      -       -      +
    150E  LEU*     1.3    62.2    +      -       -      +
    152E  ARG*     3.5    28.7    +      -       -      +
    153E  ILE*     3.2    24.8    +      -       +      +
    117F  ASN*     2.9    45.7    +      -       -      +
    118F  ALA      4.7     0.6    +      -       -      -
    119F  GLU*     3.3    30.4    +      -       -      +
    176F  THR*     6.3     1.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 150 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     71E  VAL*     4.3     4.5    -      -       +      -
     75E  PHE*     3.7    23.8    -      -       +      -
     99E  MET*     3.7    31.6    -      -       +      -
    102E  PHE*     3.7    32.8    -      -       +      -
    125E  PRO*     4.0    28.3    -      -       +      -
    146E  THR*     2.9    28.3    +      -       +      +
    147E  ARG*     3.1     5.4    +      -       +      +
    149E  LYS*     1.3    76.4    -      -       -      +
    151E  ASN*     1.3    62.1    +      -       -      +
    153E  ILE      3.3     1.6    +      -       -      -
    154E  LEU*     2.9    32.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 151 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    147E  ARG*     2.8    37.2    +      -       -      +
    148E  GLU*     3.8     5.7    -      -       -      +
    150E  LEU*     1.3    77.0    -      -       -      +
    152E  ARG*     1.3    56.6    +      -       -      +
    154E  LEU*     3.7     2.6    -      -       -      +
    155E  SER*     2.8    31.5    +      -       -      -
    162E  ILE*     4.3    16.0    +      -       +      +
    165E  ILE*     3.5    28.7    -      -       +      +
    166E  GLN*     3.0    41.4    +      -       -      +
    169E  THR*     4.3     6.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 152 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    148E  GLU*     2.8    23.4    +      -       -      +
    149E  LYS*     3.7    36.8    -      -       -      +
    150E  LEU      3.3     0.2    -      -       -      -
    151E  ASN*     1.3    72.2    -      -       -      +
    153E  ILE*     1.3    71.3    +      -       -      +
    155E  SER*     3.3     4.9    -      -       -      -
    156E  GLU*     3.2    41.2    +      -       +      +
    162E  ILE*     4.2    23.4    -      -       +      +
    117F  ASN*     4.0    21.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 153 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     75E  PHE*     3.7    20.9    -      -       +      -
     78E  TYR*     3.2    33.7    -      -       +      +
    102E  PHE*     3.7    14.4    -      -       +      -
    149E  LYS*     3.2    18.7    +      -       +      +
    150E  LEU      4.0     2.7    -      -       -      +
    152E  ARG*     1.3    88.6    -      -       -      +
    154E  LEU*     1.3    62.7    +      -       -      +
    156E  GLU*     3.2    25.3    +      -       -      +
    157E  ARG*     3.2    21.2    -      -       +      +
    117F  ASN*     3.5    37.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 154 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101E  SER*     6.1     0.2    -      -       -      +
    102E  PHE*     4.0    28.4    -      -       +      +
    105E  ALA*     4.3    15.0    -      -       +      -
    122E  ILE*     5.1    13.9    -      -       +      -
    150E  LEU*     2.9    18.8    +      -       +      +
    151E  ASN*     3.7     6.7    -      -       -      +
    153E  ILE*     1.3    77.9    -      -       -      +
    155E  SER*     1.3    56.0    +      -       -      +
    157E  ARG*     3.1     4.8    +      -       +      +
    158E  THR*     2.8    44.4    +      -       +      +
    165E  ILE*     4.1    26.5    -      -       +      -
    169E  THR*     5.3     5.6    -      -       +      -
    183E  TYR*     5.7     0.4    -      -       +      -
    185E  LEU*     4.1    24.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 155 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    151E  ASN      2.8    13.6    +      -       -      -
    152E  ARG      3.3    11.2    -      -       -      -
    154E  LEU*     1.3    75.2    -      -       -      +
    156E  GLU*     1.3    57.8    +      -       -      +
    158E  THR*     4.0     1.6    -      -       -      -
    159E  GLY*     3.0    30.8    +      -       -      -
    160E  GLN      2.8    24.2    +      -       -      +
    161E  SER*     4.0     2.0    -      -       -      -
    162E  ILE*     3.6    28.1    +      -       -      +
    165E  ILE*     4.4     4.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 156 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     78E  TYR*     5.2     1.7    +      -       -      -
    109E  LYS*     3.7    11.3    +      -       -      -
    152E  ARG*     3.2    33.1    +      -       +      +
    153E  ILE*     3.2    24.5    +      -       -      +
    155E  SER*     1.3    76.3    -      -       -      +
    157E  ARG*     1.3    64.4    +      -       +      +
    158E  THR      3.5     0.2    -      -       -      -
    159E  GLY*     4.3     3.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 157 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     78E  TYR*     3.3    28.1    +      -       -      -
     82E  GLN*     3.6    32.0    +      -       -      +
    102E  PHE*     5.8     0.7    -      -       -      -
    105E  ALA*     3.5    35.6    +      -       +      +
    106E  ALA*     4.1     8.9    +      -       -      +
    107E  GLY      3.7    15.6    +      -       -      -
    108E  ALA*     6.3     0.2    -      -       -      +
    109E  LYS*     3.7    36.2    +      -       -      +
    112E  ARG*     3.0    27.6    +      -       -      +
    153E  ILE*     3.2    20.6    -      -       +      +
    154E  LEU*     3.1     7.8    +      -       -      +
    156E  GLU*     1.3    84.1    -      -       +      +
    158E  THR*     1.3    61.7    +      -       -      +
    184E  GLY      3.3     2.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 158 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    105E  ALA*     5.0     1.8    -      -       +      -
    154E  LEU*     2.8    31.8    +      -       +      +
    155E  SER*     3.7     1.2    +      -       -      -
    157E  ARG*     1.3    80.7    -      -       -      +
    159E  GLY*     1.3    57.9    +      -       -      +
    160E  GLN*     3.2    21.9    +      -       -      +
    165E  ILE*     4.0     2.8    -      -       -      +
    183E  TYR*     3.5    27.0    -      -       +      +
    184E  GLY*     3.4    29.9    -      -       -      +
    185E  LEU*     3.7    25.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 159 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    155E  SER      3.0    12.4    +      -       -      -
    156E  GLU      4.3     3.0    +      -       -      -
    157E  ARG      3.6     1.6    -      -       -      +
    158E  THR*     1.3    76.9    -      -       -      +
    160E  GLN*     1.3    62.2    +      -       -      +
    161E  SER      4.0     0.5    +      -       -      -
----------------------------------------------------------
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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