Contacts of the helix formed by residues 149 - 171 (chain E) in PDB entry 2Q9Q


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 THR 149 (chain E).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     87E  MET*     4.8     3.5    -      -       -      +
     89E  SER      4.1     0.9    +      -       -      -
     90E  PRO*     3.0    32.1    +      -       -      +
     92E  TYR*     4.0    18.9    -      -       +      -
     93E  MET*     5.7     0.9    -      -       +      -
     94E  GLU*     5.0     5.2    -      -       -      +
    121E  TRP*     5.6     0.2    -      -       +      -
    124E  ARG*     4.7     1.3    -      -       -      -
    147E  ASN      3.4     2.5    +      -       -      -
    148E  LEU*     1.3    74.3    -      -       -      +
    150E  LEU*     1.3    60.4    +      -       -      +
    151E  MET*     3.2    21.1    -      -       +      +
    152E  GLU*     2.8    36.5    +      -       +      +
    153E  ILE*     2.9    30.7    +      -       -      +
----------------------------------------------------------
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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
----------------------------------------------------------
      1E  MET*     4.5     7.2    -      -       +      -
      6E  VAL*     3.8    28.0    -      -       +      -
      9E  LEU*     4.0    26.7    -      -       +      -
     90E  PRO      4.3     3.7    +      -       -      +
     91E  TYR*     4.2    18.4    -      -       +      +
    148E  LEU      4.0     0.4    +      -       -      -
    149E  THR*     1.3    74.6    +      -       -      +
    151E  MET*     1.3    58.2    +      -       -      +
    153E  ILE*     4.3    14.6    -      -       +      +
    154E  ASN*     2.8    37.9    +      -       +      +
     35F  MET*     4.3    19.5    -      -       +      -
     39F  PHE*     5.7     3.4    -      -       +      -
    203F  GLN*     5.8     0.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with MET 151 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      3E  ALA*     3.7    37.5    -      -       -      +
      6E  VAL*     3.7    20.0    -      -       +      +
      7E  GLU      4.4     0.2    -      -       -      +
     93E  MET*     4.8     5.2    -      -       +      -
     94E  GLU*     3.4    42.1    +      -       +      +
    121E  TRP*     3.9    20.1    -      -       +      -
    149E  THR*     3.2    10.6    -      -       +      +
    150E  LEU*     1.3    79.1    -      -       -      +
    152E  GLU*     1.3    56.6    +      -       -      +
    154E  ASN*     4.0     3.0    -      -       -      +
    155E  THR*     2.7    40.1    +      -       -      -
    186H  PHE*     4.1    20.4    -      -       +      -
    189H  TRP*     4.1    19.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 152 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     92E  TYR*     2.8    26.3    +      -       +      -
    121E  TRP*     3.5    29.1    -      -       +      -
    124E  ARG*     2.9    38.8    +      -       -      +
    125E  ILE*     4.4    11.2    -      -       +      +
    128E  LEU*     4.0    14.7    -      -       +      +
    148E  LEU*     3.4    16.1    -      -       +      +
    149E  THR*     2.8    43.3    +      -       +      +
    150E  LEU      3.2     0.2    -      -       -      -
    151E  MET*     1.3    76.1    -      -       -      +
    153E  ILE*     1.3    64.1    +      -       -      +
    155E  THR*     3.7     1.4    +      -       -      -
    156E  SER*     3.6    15.2    +      -       -      -
----------------------------------------------------------
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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
----------------------------------------------------------
    128E  LEU*     5.6     1.1    -      -       -      -
    145E  LEU*     4.0    10.8    -      -       +      -
    148E  LEU*     3.6    40.6    -      -       +      +
    149E  THR      2.9    23.2    +      -       -      +
    150E  LEU*     3.7    15.3    -      -       +      +
    152E  GLU*     1.3    78.3    -      -       -      +
    154E  ASN*     1.3    54.9    +      -       +      +
    157E  GLY*     2.7    35.4    +      -       -      +
    172F  PHE*     3.8    38.4    -      -       +      -
    203F  GLN*     3.7    18.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 154 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      1E  MET*     2.9    52.7    +      -       -      +
      2E  ASP*     4.1     9.2    -      -       -      -
      3E  ALA*     4.6     1.2    +      -       -      -
      6E  VAL*     4.2    11.2    -      -       +      +
    150E  LEU*     2.8    23.2    +      -       +      +
    151E  MET*     4.2     3.3    -      -       -      +
    153E  ILE*     1.3    79.8    -      -       +      +
    155E  THR*     1.3    63.0    +      -       -      +
    156E  SER      3.5     0.2    -      -       -      -
    157E  GLY*     4.0     3.6    +      -       -      +
    158E  THR*     4.7    12.9    +      -       -      -
     39F  PHE*     4.2    15.2    -      -       -      -
    182H  GLY*     5.4     2.1    -      -       -      -
    185H  ASP*     5.2     0.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 155 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121E  TRP*     3.8    18.6    -      -       +      -
    125E  ILE*     6.1     2.5    -      -       +      -
    151E  MET*     2.7    26.3    +      -       -      -
    152E  GLU      4.2     3.1    -      -       -      -
    153E  ILE      3.4     0.4    -      -       -      -
    154E  ASN*     1.3    79.0    -      -       -      +
    156E  SER*     1.3    65.0    +      -       -      +
    158E  THR*     5.3     0.6    +      -       -      -
    159E  PHE*     5.8     0.3    -      -       -      +
    154H  GLN*     4.9     2.4    -      -       -      +
    179H  GLY*     4.9     3.5    -      -       -      +
    182H  GLY*     3.5    41.8    -      -       -      +
    183H  LEU*     4.1    16.6    +      -       +      -
    186H  PHE*     3.8    24.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 156 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    125E  ILE*     4.3    11.1    -      -       -      +
    128E  LEU*     3.7    29.7    -      -       -      +
    152E  GLU      3.6     4.7    +      -       -      -
    155E  THR*     1.3    82.4    -      -       -      +
    157E  GLY*     1.3    66.6    +      -       -      +
    158E  THR      3.4     1.6    -      -       -      -
    159E  PHE*     3.1    19.3    +      -       -      +
    160E  LEU*     3.2    15.8    +      -       -      +
    150H  MET*     4.5     8.7    -      -       -      +
    154H  GLN*     3.2    30.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 157 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128E  LEU*     5.8     0.2    -      -       -      +
    153E  ILE*     2.7    24.2    +      -       -      +
    154E  ASN*     4.0     2.0    -      -       -      -
    155E  THR      3.6     1.0    -      -       -      -
    156E  SER*     1.3    78.0    -      -       -      +
    158E  THR*     1.3    62.9    +      -       -      +
    160E  LEU*     3.1     5.0    +      -       -      +
    161E  THR*     2.9    27.2    +      -       -      +
    172F  PHE*     3.7    21.8    -      -       -      -
----------------------------------------------------------
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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
----------------------------------------------------------
    154E  ASN*     4.7    12.8    +      -       -      -
    155E  THR      5.3     0.4    -      -       -      -
    156E  SER      3.4     1.0    -      -       -      -
    157E  GLY*     1.3    74.2    -      -       -      +
    159E  PHE*     1.3    64.6    +      -       -      +
    161E  THR*     3.1     9.2    +      -       -      +
    162E  GLN*     2.9    38.1    +      -       +      +
    178H  THR*     3.6    20.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 159 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    155E  THR      5.7     0.4    +      -       -      +
    156E  SER*     3.1    14.4    +      -       -      +
    158E  THR*     1.3    77.8    -      -       -      +
    160E  LEU*     1.3    60.4    +      -       -      +
    162E  GLN*     3.6     1.9    -      -       -      +
    163E  ALA*     2.9    29.1    +      -       -      +
    146H  PHE*     3.6    22.9    -      +       -      -
    149H  ILE*     3.8     9.0    -      -       +      -
    150H  MET*     3.4    54.7    -      -       +      -
    153H  SER*     3.9    11.4    -      -       -      -
    154H  GLN*     4.9     3.1    -      -       -      +
    175H  LEU*     3.3    57.5    -      -       +      +
    176H  PHE      4.3     0.2    -      -       -      -
    178H  THR*     3.8     9.1    -      -       -      +
    179H  GLY*     3.5    23.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 160 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128E  LEU*     4.2    22.2    -      -       +      -
    132E  ALA*     3.4    35.9    -      -       +      +
    135E  PHE*     5.6     2.9    -      -       +      -
    136E  VAL*     5.4     2.0    -      -       +      -
    156E  SER*     3.2    12.9    +      -       -      +
    157E  GLY*     3.1     9.3    +      -       -      +
    159E  PHE*     1.3    80.6    -      -       -      +
    161E  THR*     1.3    62.6    +      -       +      +
    163E  ALA*     3.4     3.5    +      -       -      +
    164E  LEU*     3.1    41.1    +      -       +      +
    172F  PHE*     4.5    19.7    -      -       +      -
    205F  LEU*     5.2     7.2    -      -       +      -
    146H  PHE*     4.2    14.6    -      -       +      -
    150H  MET*     4.1    12.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 161 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    157E  GLY      2.9    17.9    +      -       -      +
    158E  THR*     3.1    16.8    +      -       -      +
    160E  LEU*     1.3    71.7    -      -       -      +
    162E  GLN*     1.3    60.3    +      -       -      +
    164E  LEU*     3.5     3.6    +      -       -      +
    165E  ASN*     2.9    39.3    +      -       -      +
    170F  TYR*     3.2    42.0    -      -       +      +
    171F  VAL*     4.3     0.9    -      -       -      -
    172F  PHE*     3.7    24.7    -      -       +      -
    205F  LEU*     4.1     6.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 162 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    158E  THR*     2.9    26.3    +      -       +      +
    159E  PHE      3.6     3.8    -      -       -      +
    161E  THR*     1.3    76.7    +      -       -      +
    163E  ALA*     1.3    63.1    +      -       -      +
    165E  ASN*     3.3    11.6    +      -       +      +
    166E  HIS*     3.1    48.5    +      -       +      +
    174H  GLY      3.8    12.1    +      -       -      -
    175H  LEU*     3.8    14.1    -      -       +      +
    178H  THR*     2.7    37.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 163 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    136E  VAL*     5.5     0.2    -      -       +      -
    159E  PHE      2.9    17.4    +      -       -      +
    160E  LEU      3.8     3.4    -      -       -      +
    162E  GLN*     1.3    75.1    -      -       -      +
    164E  LEU*     1.3    60.0    +      -       +      +
    166E  HIS*     3.3     2.7    +      -       -      -
    167E  MET*     2.9    43.7    +      -       +      +
    142H  PHE*     3.6    10.6    -      -       +      -
    146H  PHE*     3.7    29.4    -      -       +      -
    175H  LEU*     4.0    17.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 164 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    135E  PHE*     3.2    43.5    -      -       +      -
    136E  VAL*     4.4     8.3    -      -       +      -
    140E  GLU      4.9     4.5    -      -       -      +
    160E  LEU*     3.1    27.1    +      -       +      +
    161E  THR*     3.8     2.7    -      -       -      +
    163E  ALA*     1.3    74.4    -      -       +      +
    165E  ASN*     1.3    59.6    +      -       -      +
    167E  MET*     3.2    19.9    +      -       +      +
    168E  TYR*     2.8    30.8    +      -       -      +
    170F  TYR*     3.7    33.7    -      -       +      -
    205F  LEU*     3.7    23.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 165 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    161E  THR*     2.9    32.5    +      -       -      +
    162E  GLN*     3.6     9.9    -      -       +      +
    163E  ALA      3.3     0.2    -      -       -      -
    164E  LEU*     1.3    75.5    -      -       -      +
    166E  HIS*     1.3    67.7    +      -       +      +
    168E  TYR*     3.3     7.6    +      -       -      +
    169E  LYS*     3.1    29.7    +      -       -      +
    166F  ASP*     5.1     8.0    +      -       -      +
    168F  ASP      3.7     2.2    -      -       -      +
    169F  SER*     3.1    19.6    +      -       -      +
    170F  TYR*     2.7    36.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 166 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    162E  GLN*     3.1    41.3    +      -       +      +
    163E  ALA*     3.6     6.0    -      -       -      +
    164E  LEU      3.3     0.2    -      -       -      -
    165E  ASN*     1.3    81.1    -      -       +      +
    167E  MET*     1.3    63.2    +      -       -      +
    169E  LYS*     3.2     7.3    +      -       +      +
    170E  LEU*     3.0    28.1    +      -       +      +
     13H  LEU*     3.6    26.5    -      -       +      +
    142H  PHE*     4.0    11.7    -      -       +      -
    171H  MET*     3.4    39.4    -      -       +      +
    175H  LEU*     4.5     4.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with MET 167 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    136E  VAL*     3.5    50.7    -      -       +      +
    139E  GLN*     6.3     1.6    -      -       -      -
    163E  ALA*     2.9    35.5    +      -       +      +
    164E  LEU*     3.2    16.8    +      -       +      +
    166E  HIS*     1.3    77.7    -      -       -      +
    168E  TYR*     1.3    50.9    +      -       -      +
    170E  LEU*     3.2     3.1    +      -       -      -
    171E  ARG*     2.7    40.1    +      -       -      +
    139H  LEU*     3.7    20.0    -      -       +      +
    142H  PHE*     3.6    29.8    -      -       +      -
    143H  ILE*     4.6     7.2    -      -       +      -
    146H  PHE*     3.9     7.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 168 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    164E  LEU      2.8    19.9    +      -       -      +
    165E  ASN*     3.6     6.5    -      -       -      +
    166E  HIS      3.3     0.2    -      -       -      -
    167E  MET*     1.3    73.7    -      -       -      +
    169E  LYS*     1.3    70.1    +      -       +      +
    171E  ARG*     3.3     6.3    +      -       +      +
    172E  THR*     2.8    52.9    +      -       +      +
    168F  ASP*     3.5    38.5    +      -       +      +
    170F  TYR*     4.3    17.7    -      +       +      +
    185F  GLU*     4.1     8.5    +      -       -      +
    186F  PRO      3.6    25.1    -      -       -      -
    187F  ASP*     4.4     7.0    +      -       -      -
    188F  THR*     5.8     1.0    -      -       -      +
    207F  ARG*     3.8    34.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 169 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    165E  ASN*     3.1    19.7    +      -       -      +
    166E  HIS*     3.4    11.9    -      -       +      +
    168E  TYR*     1.3    83.0    -      -       +      +
    170E  LEU*     1.3    57.3    +      -       -      +
    172E  THR*     3.0     8.5    +      -       -      +
    173E  ASN*     2.9    30.7    +      -       -      +
    166F  ASP*     3.1    35.8    +      -       -      -
    168F  ASP*     4.7    11.1    +      -       -      +
     11H  GLY*     5.7     3.4    -      -       -      -
     13H  LEU*     3.5    27.0    -      -       +      +
     14H  GLY*     4.0    20.3    -      -       -      +
     15H  PRO*     5.1     4.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 170 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    166E  HIS      3.0    20.0    +      -       -      +
    167E  MET      3.8     3.6    -      -       -      +
    169E  LYS*     1.3    77.1    -      -       -      +
    171E  ARG*     1.3    59.9    +      -       -      +
    172E  THR      3.1     0.2    -      -       -      -
    173E  ASN*     3.0    36.8    +      -       -      +
     13H  LEU*     3.7    34.1    -      -       +      +
    117H  TYR*     3.8    34.1    -      -       +      +
    121H  SER*     4.6     1.3    -      -       -      -
    135H  SER*     3.8    10.4    +      -       -      +
    138H  LEU*     3.9    26.5    -      -       +      +
    139H  LEU*     4.1    19.4    -      -       +      +
    142H  PHE*     4.4    14.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 171 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    139E  GLN*     3.5    46.2    +      -       -      +
    167E  MET*     2.7    25.5    +      -       -      +
    168E  TYR*     3.7     9.0    -      -       -      +
    169E  LYS      3.1     0.4    -      -       -      -
    170E  LEU*     1.3    73.0    -      -       -      +
    172E  THR*     1.3    63.2    +      -       +      +
    173E  ASN      3.8     0.2    -      -       -      -
    174E  LEU*     6.4     0.2    -      -       -      -
    186F  PRO*     3.8    29.9    +      -       -      +
    187F  ASP*     2.8    39.6    +      -       +      +
    188F  THR*     5.1     2.1    +      -       -      -
    192F  ARG*     5.2     9.9    -      -       -      +
    139H  LEU*     4.1    17.9    -      -       +      +
----------------------------------------------------------
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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