Contacts of the helix formed by residues 222 - 249 (chain A) in PDB entry 4DJ9


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 GLY 222 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    215A  THR*     4.2    15.4    -      -       -      +
    221A  GLN*     1.3    77.3    -      -       -      +
    223A  ILE*     1.3    61.5    -      -       -      +
    225A  GLU*     3.6    14.3    +      -       -      +
    226A  ALA*     3.6    12.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 223 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    152A  GLU*     6.0     0.9    -      -       -      +
    212A  PHE*     3.6    33.8    -      -       +      +
    215A  THR*     3.7    31.2    +      -       -      +
    221A  GLN      4.1    13.7    -      -       -      +
    222A  GLY*     1.3    76.3    -      -       -      +
    224A  GLU*     1.4    66.9    +      -       -      +
    225A  GLU      3.3     0.2    +      -       -      -
    226A  ALA*     3.4     2.1    +      -       -      +
    227A  LEU*     3.0    35.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 224 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    221A  GLN*     3.5    17.0    +      -       -      +
    222A  GLY      3.4     0.6    -      -       -      -
    223A  ILE*     1.4    85.6    -      -       +      +
    225A  GLU*     1.3    56.5    +      -       -      +
    227A  LEU*     4.0    18.3    -      -       -      +
    228A  LYS*     3.3    26.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 225 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    221A  GLN      3.9     6.5    +      -       -      +
    222A  GLY*     3.6    10.0    +      -       -      +
    223A  ILE      3.3     0.6    -      -       -      -
    224A  GLU*     1.3    76.3    -      -       -      +
    226A  ALA*     1.4    63.2    +      -       -      +
    227A  LEU      3.3     0.2    -      -       -      -
    228A  LYS*     3.2     7.2    +      -       +      +
    229A  ASN*     3.2    42.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 226 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    208A  ALA*     4.1     7.5    -      -       -      +
    211A  ILE*     3.7    29.8    -      -       +      -
    212A  PHE*     3.9    22.6    -      -       +      +
    215A  THR*     4.0     8.7    -      -       +      +
    222A  GLY      3.6     6.2    +      -       -      +
    223A  ILE      3.4     6.8    +      -       -      +
    225A  GLU*     1.4    75.0    -      -       -      +
    227A  LEU*     1.3    62.5    +      -       -      +
    229A  ASN*     3.7     7.0    +      -       -      +
    230A  ARG*     3.2    23.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 227 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    212A  PHE*     4.0    26.4    -      -       +      -
    223A  ILE*     3.0    21.5    +      -       +      +
    224A  GLU*     4.0    22.0    -      -       -      +
    226A  ALA*     1.3    75.8    -      -       -      +
    228A  LYS*     1.4    61.4    +      -       +      +
    230A  ARG*     3.4    22.2    +      -       -      +
    231A  ASN*     2.9    60.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 228 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    224A  GLU      3.3    17.4    +      -       -      +
    225A  GLU*     3.2     9.7    +      -       -      +
    227A  LEU*     1.4    83.0    -      -       +      +
    229A  ASN*     1.3    60.7    +      -       -      +
    231A  ASN*     3.5     5.8    +      -       -      +
    232A  PHE*     2.9    29.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 229 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    208A  ALA*     4.3    10.1    -      -       +      -
    225A  GLU*     3.2    33.1    +      -       -      +
    226A  ALA*     4.1     6.1    -      -       -      +
    228A  LYS*     1.3    75.9    -      -       -      +
    230A  ARG*     1.3    59.4    +      -       -      +
    232A  PHE*     3.6    11.0    -      -       -      +
    233A  THR*     2.8    33.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 230 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    148A  ALA*     4.0    13.8    +      -       -      +
    149A  GLU*     3.4    38.2    +      -       -      +
    205A  LEU*     3.8     9.4    -      -       +      +
    208A  ALA*     3.8    15.4    -      -       +      +
    209A  MET*     3.6    35.7    -      -       +      +
    212A  PHE*     3.4    43.8    -      -       +      -
    226A  ALA      3.2    18.6    +      -       -      +
    227A  LEU*     3.7    23.4    -      -       -      +
    229A  ASN*     1.3    75.5    -      -       -      +
    231A  ASN*     1.4    85.0    +      -       -      +
    233A  THR*     3.4     4.7    +      -       -      -
    234A  VAL*     3.1    31.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 231 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    149A  GLU*     4.6     6.0    +      -       -      +
    227A  LEU*     2.9    41.3    +      -       -      +
    228A  LYS*     3.8     6.4    -      -       -      +
    230A  ARG*     1.4   103.7    +      -       -      +
    232A  PHE*     1.3    55.6    +      -       -      +
    234A  VAL*     3.6     6.9    +      -       -      +
    235A  GLU*     3.1    28.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 232 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    201A  LEU*     5.9     5.6    -      -       +      -
    228A  LYS      2.9    18.6    +      -       -      +
    229A  ASN*     3.6    13.7    -      -       -      +
    230A  ARG      3.3     0.2    -      -       -      -
    231A  ASN*     1.3    74.7    -      -       -      +
    233A  THR*     1.4    68.0    +      -       -      +
    235A  GLU*     3.3    13.8    +      -       -      +
    236A  LYS*     3.0    72.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 233 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    201A  LEU*     3.4    36.8    -      -       +      +
    204A  VAL*     4.1    16.8    +      -       +      +
    205A  LEU*     3.7    26.6    -      -       +      +
    208A  ALA*     4.7     1.6    -      -       -      +
    229A  ASN      2.8    17.0    +      -       -      -
    230A  ARG*     3.4     5.4    +      -       -      -
    232A  PHE*     1.4    81.8    -      -       -      +
    234A  VAL*     1.3    59.6    +      -       -      +
    236A  LYS*     3.4     4.5    +      -       -      +
    237A  MET*     2.9    34.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 234 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    145A  LEU*     3.8    34.8    -      -       +      +
    146A  THR*     4.9     4.5    -      -       +      +
    148A  ALA*     4.0     9.6    -      -       +      -
    205A  LEU*     3.7    24.5    -      -       +      -
    230A  ARG*     3.1    20.1    +      -       +      +
    231A  ASN*     3.9     7.9    -      -       -      +
    232A  PHE      3.4     0.2    -      -       -      -
    233A  THR*     1.3    74.1    -      -       -      +
    235A  GLU*     1.3    50.9    +      -       -      +
    237A  MET*     3.3     7.6    +      -       -      +
    238A  SER*     2.7    50.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 235 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    231A  ASN      3.1    16.9    +      -       -      +
    232A  PHE*     3.4    14.0    -      -       -      +
    234A  VAL*     1.3    76.5    -      -       -      +
    236A  LYS*     1.4    83.0    +      -       -      +
    238A  SER*     3.4     5.5    +      -       -      -
    239A  ALA*     3.0    30.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 236 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    197A  THR*     5.9     0.7    -      -       +      -
    201A  LEU*     3.7    24.5    -      -       +      -
    232A  PHE*     3.0    57.9    +      -       +      +
    233A  THR*     3.9     1.3    -      -       -      +
    235A  GLU*     1.4    99.0    +      -       +      +
    237A  MET*     1.3    63.9    +      -       -      +
    239A  ALA*     3.5     6.9    +      -       +      +
    240A  GLU*     3.3    27.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 237 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    145A  LEU*     3.9    24.9    -      -       +      -
    168A  MET*     3.8    25.4    -      -       +      -
    198A  VAL*     3.7    30.2    -      -       +      +
    201A  LEU*     3.6    37.7    -      -       +      +
    202A  LEU*     3.8    16.4    -      -       +      -
    205A  LEU*     4.1    14.6    -      -       +      -
    233A  THR*     2.9    27.9    +      -       -      +
    234A  VAL      3.8     3.1    -      -       -      +
    236A  LYS*     1.3    75.8    -      -       -      +
    238A  SER*     1.3    62.9    +      -       -      +
    240A  GLU*     3.3     7.8    +      -       -      +
    241A  ILE*     3.1    26.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 238 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    142A  LEU*     3.7    25.7    +      -       -      +
    145A  LEU*     4.0    11.2    -      -       -      +
    146A  THR*     5.9     1.6    -      -       -      +
    234A  VAL*     2.7    39.4    +      -       -      +
    235A  GLU*     3.8     6.3    -      -       -      -
    237A  MET*     1.3    73.2    -      -       -      +
    239A  ALA*     1.4    54.3    +      -       -      +
    241A  ILE*     3.3     1.2    +      -       -      -
    242A  ASN*     2.9    39.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 239 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    235A  GLU*     3.0    18.9    +      -       +      +
    236A  LYS*     3.8     9.2    -      -       +      +
    238A  SER*     1.4    71.3    -      -       -      +
    240A  GLU*     1.3    63.6    +      -       +      +
    242A  ASN*     3.6     8.2    +      -       -      +
    243A  GLU*     3.1    26.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 240 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    193A  ASN      5.0     0.3    -      -       -      -
    194A  SER*     2.8    35.6    +      -       -      +
    197A  THR*     3.8    32.7    +      -       +      +
    198A  VAL*     3.5    22.0    -      -       +      -
    236A  LYS      3.3    14.2    +      -       -      +
    237A  MET*     3.3     3.0    +      -       -      +
    239A  ALA*     1.3    75.8    -      -       -      +
    241A  ILE*     1.3    60.4    +      -       -      +
    243A  GLU*     3.1     8.9    +      -       -      +
    244A  ILE*     3.0    32.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 241 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    138A  CYS*     3.6    26.7    -      -       +      +
    141A  ILE*     3.6    32.3    -      -       +      -
    142A  LEU*     3.5    27.4    -      -       +      +
    145A  LEU*     3.6    22.7    -      -       +      -
    171A  MET*     3.8    16.6    -      -       +      -
    198A  VAL*     4.0    20.9    -      -       +      -
    237A  MET      3.1    16.0    +      -       -      +
    238A  SER      3.8     4.5    -      -       -      +
    240A  GLU*     1.3    75.7    -      -       -      +
    242A  ASN*     1.3    56.1    +      -       -      +
    244A  ILE*     3.0     9.6    +      -       -      +
    245A  ILE*     3.0    26.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 242 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    142A  LEU*     3.4    28.8    -      -       -      +
    238A  SER*     2.9    28.5    +      -       -      +
    239A  ALA*     3.9     7.4    -      -       -      +
    240A  GLU      3.3     0.2    -      -       -      -
    241A  ILE*     1.3    75.0    -      -       -      +
    243A  GLU*     1.3    61.4    +      -       -      +
    245A  ILE*     3.6    13.1    +      -       -      +
    246A  ARG*     3.1    22.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 243 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    190A  MET*     3.2    31.8    -      -       +      +
    194A  SER*     3.8    16.8    -      -       -      +
    239A  ALA      3.1    15.4    +      -       -      +
    240A  GLU*     3.1    12.1    +      -       -      +
    242A  ASN*     1.3    75.1    -      -       -      +
    244A  ILE*     1.3    58.3    +      -       -      +
    246A  ARG*     2.9    33.2    +      -       -      +
    247A  VAL*     2.9    39.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 244 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    138A  CYS*     4.1     8.3    -      -       -      -
    171A  MET*     3.9     9.0    -      -       +      -
    175A  ILE*     3.6    29.4    -      -       +      -
    190A  MET      5.2     0.2    -      -       -      +
    191A  LEU*     3.9    19.9    -      -       +      +
    194A  SER*     3.5    20.0    -      -       -      +
    195A  MET*     3.5    45.3    -      -       +      +
    198A  VAL*     4.6     2.7    -      -       +      -
    240A  GLU      3.0    16.3    +      -       -      +
    241A  ILE*     3.0    11.2    +      -       -      +
    243A  GLU*     1.3    73.4    -      -       -      +
    245A  ILE*     1.4    65.8    +      -       -      +
    247A  VAL*     3.2     1.8    +      -       -      -
    248A  LEU*     2.9    37.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 245 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    135A  ILE*     4.2    22.2    -      -       +      +
    138A  CYS*     3.7    28.0    -      -       +      -
    139A  LYS*     3.9    24.5    -      -       +      +
    142A  LEU*     3.8    29.6    -      -       +      -
    241A  ILE      3.0    13.8    +      -       -      +
    242A  ASN*     3.8    15.5    -      -       -      +
    244A  ILE*     1.4    76.7    -      -       -      +
    246A  ARG*     1.3    60.0    +      -       -      +
    248A  LEU*     3.7    11.1    +      -       -      +
    249A  GLN*     2.9    39.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 246 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    190A  MET*     3.3    20.0    -      -       -      +
    242A  ASN      3.1    15.0    +      -       -      +
    243A  GLU*     2.9    44.5    +      -       -      +
    244A  ILE      3.2     0.2    -      -       -      -
    245A  ILE*     1.3    77.6    -      -       -      +
    247A  VAL*     1.4    67.8    +      -       -      +
    249A  GLN*     3.5    19.9    +      -       -      +
    250A  LEU*     3.7    37.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 247 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    182A  LEU*     5.7     2.1    -      -       -      +
    187A  HIS*     3.6    42.6    -      -       +      +
    190A  MET*     3.9    24.0    -      -       +      -
    191A  LEU*     3.9    19.3    -      -       +      +
    243A  GLU*     2.9    28.2    +      -       +      +
    246A  ARG*     1.4    94.1    -      -       -      +
    248A  LEU*     1.3    63.9    +      -       -      +
    250A  LEU*     3.2    29.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 248 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    131A  VAL*     3.4    32.3    -      -       +      +
    134A  ILE*     3.5    32.8    -      -       +      -
    135A  ILE*     4.3    11.9    -      -       +      -
    138A  CYS*     4.2     7.2    -      -       -      -
    175A  ILE*     4.1     9.9    -      -       +      -
    178A  ARG*     3.7    40.4    +      -       +      +
    182A  LEU*     5.9     2.1    -      -       -      +
    191A  LEU*     3.9    19.7    -      -       +      -
    244A  ILE*     2.9    40.2    +      -       +      +
    245A  ILE*     3.9     5.8    -      -       -      +
    247A  VAL*     1.3    77.6    -      -       -      +
    249A  GLN*     1.4    56.7    +      -       -      +
    250A  LEU      3.4     3.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 249 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    131A  VAL*     4.3     6.7    -      -       +      -
    135A  ILE*     3.6    22.4    -      -       +      +
    245A  ILE*     2.9    38.4    +      -       -      +
    246A  ARG*     3.5    12.6    +      -       -      +
    247A  VAL      3.2     1.0    -      -       -      -
    248A  LEU*     1.4    73.0    -      -       -      +
    250A  LEU*     1.4    63.7    +      -       +      +
    251A  THR*     3.7    10.7    +      -       -      +
----------------------------------------------------------
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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