Contacts of the helix formed by residues 282 - 310 (chain A) in PDB entry 1BJW


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 GLN 282 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     79A  GLU*     5.6     2.4    +      -       -      -
     83A  ARG*     3.7    38.9    -      -       -      +
    279A  LEU      4.2    14.1    +      -       -      +
    280A  THR*     2.9    19.9    +      -       -      +
    281A  ASN*     1.3    70.0    -      -       -      +
    283A  GLU*     1.3    56.8    +      -       -      +
    285A  SER*     4.2     4.9    -      -       -      -
    286A  ARG*     3.0    32.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 283 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    281A  ASN*     3.0     7.4    +      -       -      +
    282A  GLN*     1.3    80.5    -      -       -      +
    284A  ALA*     1.3    64.6    +      -       +      +
    286A  ARG*     4.2     7.2    +      -       -      +
    287A  ALA*     3.2    22.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 284 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48A  HIS*     3.6    34.6    +      -       +      +
    281A  ASN*     3.1    22.1    +      -       -      +
    283A  GLU*     1.3    75.4    -      -       +      +
    285A  SER*     1.3    64.8    +      -       -      +
    287A  ALA*     3.4     7.8    +      -       -      +
    288A  PHE*     3.1    22.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 285 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48A  HIS*     2.9    25.0    -      -       -      -
    236A  PHE*     3.9    17.0    -      -       -      -
    278A  ALA*     2.6    31.8    +      -       -      +
    281A  ASN      3.0    11.9    +      -       -      -
    282A  GLN*     4.2     4.7    -      -       -      -
    284A  ALA*     1.3    76.7    -      -       -      +
    286A  ARG*     1.3    58.5    +      -       -      +
    288A  PHE*     3.3     5.1    +      -       -      +
    289A  VAL*     3.0    32.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 286 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    282A  GLN      3.0    19.8    +      -       -      +
    283A  GLU*     4.2     6.4    +      -       -      +
    285A  SER*     1.3    73.4    -      -       -      +
    287A  ALA*     1.3    69.5    +      -       -      +
    288A  PHE      3.2     0.2    +      -       -      -
    289A  VAL*     3.2     6.0    +      -       +      -
    290A  GLU*     2.9    60.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 287 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    283A  GLU      3.2    16.3    +      -       -      +
    284A  ALA*     3.6     8.3    -      -       -      +
    285A  SER      3.3     0.2    -      -       -      -
    286A  ARG*     1.3    82.2    -      -       -      +
    288A  PHE*     1.3    61.4    +      -       -      +
    290A  GLU*     4.1     5.0    -      -       -      +
    291A  MET*     3.1    24.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 288 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41A  PRO*     6.1     0.2    -      -       +      -
     43A  PHE*     4.1    16.4    -      +       +      -
     44A  ASP      4.0     7.2    -      -       -      -
     46A  PRO*     3.8    44.9    -      -       +      -
    235A  ALA      3.4    25.8    -      -       -      -
    236A  PHE*     3.7    19.7    -      +       +      -
    237A  ALA*     4.0    15.9    -      -       +      -
    284A  ALA      3.1    13.4    +      -       -      +
    285A  SER*     3.6     8.5    -      -       -      +
    286A  ARG      3.1     0.2    -      -       -      -
    287A  ALA*     1.3    75.2    -      -       -      +
    289A  VAL*     1.3    58.8    -      -       -      +
    291A  MET*     3.3    29.3    +      -       +      +
    292A  ALA*     2.9    37.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 289 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    208A  HIS*     3.8    40.3    -      -       +      +
    209A  LEU*     5.7     3.5    -      -       +      +
    235A  ALA      3.9    18.8    -      -       -      +
    236A  PHE*     4.1    16.8    -      -       +      -
    285A  SER      3.0    19.8    +      -       -      +
    286A  ARG*     3.8     7.2    -      -       +      +
    288A  PHE*     1.3    77.1    -      -       +      +
    290A  GLU*     1.3    67.9    +      -       -      +
    292A  ALA*     3.3     4.6    +      -       -      +
    293A  ARG*     2.9    39.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 290 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    286A  ARG*     2.9    64.4    +      -       +      +
    287A  ALA*     4.1     4.7    -      -       -      +
    289A  VAL*     1.3    76.9    -      -       -      +
    291A  MET*     1.3    65.7    +      -       -      +
    293A  ARG*     2.5    40.1    +      -       -      +
    294A  GLU*     3.1    24.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 291 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     43A  PHE*     3.6    37.2    -      -       +      -
    287A  ALA      3.1    19.6    +      -       -      +
    288A  PHE*     3.4    26.9    -      -       +      +
    290A  GLU*     1.3    79.3    -      -       -      +
    292A  ALA*     1.3    63.4    +      -       -      +
    294A  GLU*     3.4     6.1    +      -       -      +
    295A  ALA*     3.1    20.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 292 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     43A  PHE*     4.4    16.4    -      -       +      -
    209A  LEU*     5.1     4.3    -      -       +      -
    235A  ALA      5.6     1.8    -      -       -      +
    288A  PHE*     2.9    28.7    +      -       +      +
    289A  VAL*     3.7     6.7    -      -       -      +
    291A  MET*     1.3    84.9    -      -       -      +
    293A  ARG*     1.3    57.0    +      -       -      +
    295A  ALA*     3.2     3.5    +      -       -      +
    296A  TYR*     2.8    55.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 293 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    207A  GLU      4.9     1.6    +      -       -      -
    208A  HIS*     2.9    43.1    +      -       -      +
    209A  LEU*     5.4     2.2    -      -       +      +
    210A  LEU*     3.5    26.2    +      -       -      +
    211A  TYR*     3.5    16.3    -      -       +      -
    289A  VAL*     2.9    24.7    +      -       -      +
    290A  GLU*     2.5    38.9    +      -       -      +
    291A  MET      3.4     0.2    -      -       -      -
    292A  ALA*     1.3    76.4    -      -       -      +
    294A  GLU*     1.3    55.7    +      -       -      +
    296A  TYR*     4.1     8.7    -      -       -      -
    297A  ARG*     2.9    43.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 294 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    290A  GLU      3.1    17.9    +      -       -      +
    291A  MET*     3.7     6.2    -      -       -      +
    293A  ARG*     1.3    72.3    -      -       -      +
    295A  ALA*     1.3    69.2    +      -       -      +
    297A  ARG*     3.3    12.1    +      -       -      +
    298A  ARG*     3.0    62.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 295 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     43A  PHE*     3.6    28.3    -      -       +      -
    291A  MET*     3.1    10.8    +      -       -      +
    292A  ALA      3.6     7.2    -      -       -      +
    294A  GLU*     1.3    83.5    -      -       -      +
    296A  TYR*     1.3    62.2    +      -       -      +
    298A  ARG*     3.3     9.7    +      -       -      +
    299A  ARG*     3.0    38.8    +      -       -      +
    368A  GLU*     6.1     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 296 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41A  PRO*     3.3    32.2    -      -       -      +
     42A  ASP*     3.9     4.0    -      -       -      -
     43A  PHE*     3.4    18.8    -      +       -      -
    209A  LEU*     3.7    31.2    -      -       +      -
    211A  TYR*     3.0    31.2    -      -       +      +
    234A  LLP      4.9     0.6    +      -       -      -
    292A  ALA*     2.8    39.2    +      -       +      +
    293A  ARG*     4.1     2.5    -      -       -      -
    295A  ALA*     1.3    71.0    -      -       -      +
    297A  ARG*     1.3    58.7    +      -       -      +
    299A  ARG*     3.3    26.1    +      -       -      -
    300A  ARG*     2.9    26.0    +      -       -      +
    321A  PHE*     4.1    22.9    -      +       +      -
    364A  TYR*     3.3    21.8    -      +       +      -
    365A  ALA*     4.3     5.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 297 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    210A  LEU      4.7     0.4    +      -       -      -
    211A  TYR*     3.0    48.3    +      -       +      +
    212A  GLU*     4.3     4.8    +      -       -      -
    293A  ARG*     2.9    43.4    +      -       -      +
    294A  GLU*     3.6    11.3    -      -       -      +
    295A  ALA      3.3     0.2    -      -       -      -
    296A  TYR*     1.3    72.0    -      -       -      +
    298A  ARG*     1.3    67.4    +      -       +      +
    300A  ARG*     3.3    19.1    +      -       -      +
    301A  ASP*     3.1    36.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 298 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    294A  GLU*     3.0    57.3    +      -       +      +
    295A  ALA*     3.6     9.9    -      -       -      +
    297A  ARG*     1.3    77.0    -      -       +      +
    299A  ARG*     1.3    64.4    +      -       -      +
    301A  ASP*     3.4     6.4    +      -       -      +
    302A  LEU*     3.1    23.8    +      -       -      +
    368A  GLU*     4.0    22.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 299 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     42A  ASP*     2.7    42.2    +      -       -      -
     43A  PHE*     3.7    18.7    -      -       -      -
    295A  ALA*     3.0    24.4    +      -       -      +
    296A  TYR*     3.7    17.4    -      -       -      +
    298A  ARG*     1.3    74.8    -      -       -      +
    300A  ARG*     1.3    63.7    +      -       -      +
    302A  LEU*     3.5     3.7    +      -       -      +
    303A  LEU*     3.1    24.6    +      -       -      +
    364A  TYR*     3.3    23.1    +      -       +      -
    366A  THR      3.2    27.6    +      -       -      +
    367A  SER*     4.5     7.9    -      -       -      +
    368A  GLU*     3.9    24.3    +      -       +      +
    371A  LEU*     3.6    20.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 300 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    211A  TYR*     3.5    19.8    -      -       +      +
    212A  GLU*     2.6    41.8    +      -       -      -
    296A  TYR      2.9    13.3    +      -       -      +
    297A  ARG*     3.3    19.7    +      -       -      +
    299A  ARG*     1.3    77.3    -      -       -      +
    301A  ASP*     1.3    84.0    +      -       -      +
    303A  LEU*     3.2     4.0    +      -       -      +
    304A  LEU*     2.8    50.1    +      -       +      +
    316A  ARG*     3.8    13.7    -      -       -      +
    317A  PRO*     2.9    31.7    +      -       +      -
    323A  VAL*     5.0     0.4    -      -       +      -
    364A  TYR*     3.5    40.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 301 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    297A  ARG*     3.1    25.1    +      -       -      +
    298A  ARG*     3.7     6.0    -      -       -      +
    300A  ARG*     1.3   107.5    +      -       -      +
    302A  LEU*     1.3    56.5    +      -       -      +
    304A  LEU*     3.9     7.1    -      -       -      +
    305A  GLU*     3.0    47.0    +      -       -      +
    316A  ARG*     5.3     2.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 302 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    298A  ARG      3.1    14.9    +      -       -      +
    299A  ARG*     3.8     1.3    -      -       -      +
    300A  ARG      3.3     0.2    -      -       -      -
    301A  ASP*     1.3    75.7    -      -       -      +
    303A  LEU*     1.3    62.9    +      -       -      +
    305A  GLU*     3.4    15.3    +      -       -      +
    306A  GLY*     3.1    25.5    +      -       -      -
    368A  GLU*     3.6    33.0    -      -       +      +
    371A  LEU*     3.4    36.8    -      -       +      -
    372A  ARG*     3.4    39.3    -      -       +      +
    375A  LEU*     4.0    15.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 303 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     36A  LEU*     5.2     4.5    -      -       +      -
    299A  ARG      3.1    17.5    +      -       -      +
    300A  ARG      3.6     3.6    -      -       -      +
    302A  LEU*     1.3    81.4    -      -       +      +
    304A  LEU*     1.3    64.7    +      -       -      +
    306A  GLY*     3.5     0.9    +      -       -      -
    307A  LEU*     3.1    32.2    +      -       +      +
    323A  VAL*     3.8    34.1    -      -       +      -
    362A  LEU*     4.4    23.3    -      -       +      -
    363A  SER      5.5     0.9    -      -       -      +
    364A  TYR*     4.2    17.0    -      -       +      +
    371A  LEU*     3.9    20.9    -      -       +      +
    375A  LEU*     4.0    23.6    -      -       +      -
    378A  PHE*     5.1     3.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 304 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    300A  ARG*     2.8    40.9    +      -       +      +
    301A  ASP*     3.9     5.8    -      -       -      +
    303A  LEU*     1.3    78.4    -      -       +      +
    305A  GLU*     1.3    61.9    +      -       -      +
    307A  LEU*     3.4     7.8    +      -       +      +
    308A  THR*     3.0    28.6    +      -       -      +
    314A  ALA*     4.8    11.7    -      -       +      +
    316A  ARG*     3.7    40.4    -      -       +      +
    317A  PRO*     4.1     7.4    -      -       +      -
    323A  VAL*     4.2    30.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 305 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    301A  ASP*     3.0    37.1    +      -       +      +
    302A  LEU*     3.5    13.6    -      -       -      +
    304A  LEU*     1.3    77.7    -      -       +      +
    306A  GLY*     1.3    62.5    +      -       -      +
    308A  THR*     3.4     6.8    +      -       -      -
    309A  ALA*     3.1    24.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 306 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    302A  LEU      3.1    12.7    +      -       -      -
    304A  LEU      3.4     0.2    -      -       -      -
    305A  GLU*     1.3    80.9    -      -       -      +
    307A  LEU*     1.3    61.4    +      -       -      +
    309A  ALA*     3.5     7.5    +      -       -      +
    310A  LEU*     3.2    27.4    +      -       -      +
    375A  LEU*     3.9    22.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 307 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    303A  LEU*     3.1    29.9    +      -       +      +
    304A  LEU*     3.8     9.6    -      -       +      +
    306A  GLY*     1.3    73.6    -      -       -      +
    308A  THR*     1.3    66.6    +      -       -      +
    310A  LEU*     3.0    11.7    +      -       +      +
    312A  LEU*     3.0    40.9    +      -       +      +
    314A  ALA*     4.0    27.4    -      -       +      -
    323A  VAL*     4.3    14.4    -      -       +      -
    325A  MET*     3.8    30.7    -      -       +      -
    362A  LEU*     4.5     4.5    -      -       +      -
    375A  LEU*     4.1     1.5    -      -       +      +
    378A  PHE*     3.9    26.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 308 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    304A  LEU*     3.0    16.9    +      -       -      +
    305A  GLU*     3.7     6.5    -      -       -      -
    306A  GLY      3.4     0.2    -      -       -      -
    307A  LEU*     1.3    77.4    -      -       -      +
    309A  ALA*     1.3    58.9    +      -       -      +
    311A  GLY*     2.9    19.8    +      -       -      -
    312A  LEU      4.1     8.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 309 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    305A  GLU      3.1    16.7    +      -       -      +
    306A  GLY*     3.6     9.2    -      -       -      +
    307A  LEU      3.2     0.2    -      -       -      -
    308A  THR*     1.3    76.7    -      -       -      +
    310A  LEU*     1.3    63.3    +      -       +      +
    311A  GLY      3.5     0.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 310 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    306A  GLY      3.2    19.2    +      -       -      +
    307A  LEU*     3.0     9.6    +      -       -      +
    309A  ALA*     1.3    77.9    -      -       +      +
    311A  GLY*     1.3    61.7    +      -       -      +
    312A  LEU*     4.1    18.2    -      -       +      +
    375A  LEU*     3.9    15.5    -      -       +      +
    378A  PHE*     3.7    35.0    -      -       +      -
    379A  ALA*     4.6    16.4    -      -       +      -
    382A  LEU*     4.1    34.4    -      -       +      +
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


   I  Hydrophilic      - N and O that can donate and accept hydrogen bonds
                         (e.g., oxygen of hydroxyl group of Ser. or Thr)
  II  Acceptor         - N or O that can only accept a hydrogen bond
 III  Donor            - N that can only donate a hydrogen bond
  IV  Hydrophobic      - Cl, Br, I and all C atoms that are not in
                         aromatic rings and do not have a covalent bond to
                         a N or O atom
   V  Aromatic         - C in aromatic rings irrespective of any other 
                         bonds formed by the atom
  VI  Neutral          - C atoms that have a covalent bond to at least one
                         atom of class I or two or more atoms from class II
                         or III; atoms; S, F, P, and metal atoms in all cases
 VII  Neutral-donor    - C atoms that have a covalent bond with only one
                         atom of class III
VIII  Neutral-acceptor - C atoms that have a covalent bond with only 
                         one atom of class II
For each pair of contacts the state of legitimacy is shown below:

Legend:
+, legitimate
-, illegitimate
------------------------------------------------------------
  Atomic class           I  II  III   IV   V   VI  VII  VIII
------------------------------------------------------------
   I  (Hydrophilic)      +   +    +    -   +   +    +    +
  II  (Acceptor)         +   -    +    -   +   +    +    -
 III  (Donor)            +   +    -    -   +   +    -    +
  IV  (Hydrophobic)      -   -    -    +   +   +    +    +
   V  (Aromatic)         +   +    +    +   +   +    +    +
  VI  (Neutral)          +   +    +    +   +   +    +    +
 VII  (Neutral-donor)    +   +    -    +   +   +    -    +
VIII  (Neutral-acceptor) +   -    +    +   +   +    +    -
------------------------------------------------------------
Warning!
Atom classes for heterogroups are automatically assigned based on the atomic coordinates. However, in three cases (see below) the automatic assignment is currently ambiguous. In these cases, the user is advised to manually analyse the full list of contacts using LPC software.
1. Carbon atoms belonging to a 4-, 5- or 6-member ring are 
   considered "aromatic" (Class V) if the ring is approximately
   planar, and "hydrophobic" (Class IV) or "neutral" (Classes
   VI, VII, VIII) if the ring is non-planar.
2. The oxygen atom of a carbonyl or hydroxy group is considered
   "hydroxy" (Class I) if the CO bond is longer than 1.29 Å, and
   "carbonyl" (Class II) if shorter.
3. All nitrogen atoms are considered "hydrophilic" (Class I).

Please E-mail any questions and/or suggestions concerning this page to Vladimir.Sobolev@weizmann.ac.il