Contacts of the helix formed by residues 314 - 341 (chain A) in PDB entry 6AF6


Residue contacts within the protein are derived with the CSU software (Sobolev V., Sorokine A., Prilusky J., Abola E.E. and Edelman M. (1999) Automated analysis of interatomic contacts in proteins. Bioinformatics, 15, 327-332). A short description of the analytical approach is given at the end of the page.
For CSU analysis of other PDB entry

Note:
Non-standard 3 letter residue codes indicate a heterogroup. To identify and analyse, use LPC software

Legend:
Dist - nearest distance (Å) between atoms of two residues
Surf - contact surface area (Å2) between two residues
HB   - hydrophilic-hydrophilic contact (hydrogen bond)
Arom - aromatic-aromatic contact
Phob - hydrophobic-hydrophobic contact
DC   - hydrophobic-hydrophilic contact (destabilizing contact)
+/-  - indicates presence/absence of a specific contacts
*    - indicates residues forming contacts  by their side chain
       (including CA atoms)
Residues in contact with ALA 314 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    304A  ALA      3.6    24.7    -      -       -      +
    307A  LYS*     4.1     5.8    -      -       +      -
    308A  HIS*     3.8    22.9    -      -       +      +
    312A  GLN      3.2     3.4    +      -       -      +
    313A  ASP*     1.3    74.5    +      -       -      +
    315A  GLU*     1.3    65.3    +      -       -      +
    316A  ALA      3.4     2.5    -      -       -      -
    317A  ASP*     3.1    10.3    +      -       +      +
    318A  ILE*     2.9    36.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 315 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    238A  HIS*     2.8    37.9    +      -       -      +
    242A  ILE*     3.9    25.1    -      -       +      +
    245A  LYS*     5.2     1.2    +      -       -      +
    313A  ASP*     3.4    15.4    +      -       -      +
    314A  ALA*     1.3    77.4    -      -       -      +
    316A  ALA*     1.3    64.1    +      -       -      +
    318A  ILE*     3.3     2.7    +      -       -      +
    319A  ALA*     3.0    21.8    +      -       -      +
    374A  ILE*     3.9    23.6    -      -       +      +
    377A  ARG*     3.8    20.2    +      -       -      -
    378A  LYS*     3.9    20.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 316 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    313A  ASP*     5.1     0.6    +      -       -      -
    314A  ALA      3.4     0.4    -      -       -      -
    315A  GLU*     1.3    78.4    -      -       -      +
    317A  ASP*     1.3    62.5    +      -       -      +
    319A  ALA*     3.3     7.4    +      -       -      +
    320A  MET*     2.9    41.9    +      -       +      +
    374A  ILE*     5.1     1.1    -      -       -      -
    375A  ILE*     4.2    11.4    -      -       +      +
    378A  LYS*     3.8    34.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 317 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    300A  MET*     4.7     2.8    -      -       +      +
    303A  ARG*     4.0    11.3    +      -       -      +
    304A  ALA*     3.7    22.9    -      -       +      +
    307A  LYS*     2.9    34.5    +      -       -      +
    313A  ASP      3.5    20.8    -      -       -      +
    314A  ALA*     3.1     8.9    +      -       -      +
    316A  ALA*     1.3    80.5    +      -       -      +
    318A  ILE*     1.3    57.9    +      -       -      +
    320A  MET*     3.4    22.5    +      -       +      +
    321A  SER*     2.9    31.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 318 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    242A  ILE*     3.4    36.6    -      -       +      +
    245A  LYS*     3.6    18.3    -      -       +      +
    246A  GLY*     3.6    34.8    -      -       -      +
    304A  ALA*     3.8    22.2    -      -       +      +
    305A  CYS*     5.8     1.3    -      -       -      -
    308A  HIS*     5.0     7.6    -      -       +      -
    314A  ALA*     2.9    34.5    +      -       +      +
    315A  GLU      3.8     3.8    -      -       -      +
    317A  ASP*     1.3    74.2    -      -       -      +
    319A  ALA*     1.3    60.1    -      -       -      +
    321A  SER*     3.2     4.1    +      -       -      -
    322A  LYS*     2.9    29.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 319 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    245A  LYS*     4.5     4.0    -      -       -      +
    315A  GLU      3.0    16.6    +      -       -      +
    316A  ALA      3.7     4.5    -      -       -      +
    318A  ILE*     1.3    76.1    -      -       -      +
    320A  MET*     1.3    62.7    +      -       -      +
    322A  LYS*     3.4     3.0    +      -       -      +
    323A  LEU*     3.0    25.3    +      -       -      +
    371A  GLN*     3.4    30.4    -      -       -      +
    374A  ILE*     4.0    16.6    -      -       +      -
    375A  ILE*     3.8    19.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 320 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    300A  MET*     3.8    28.3    -      -       +      -
    303A  ARG*     4.7     5.8    -      -       -      +
    316A  ALA*     2.9    21.3    +      -       +      +
    317A  ASP*     3.7    35.0    -      -       -      +
    319A  ALA*     1.3    76.1    -      -       -      +
    321A  SER*     1.3    59.0    +      -       -      +
    323A  LEU*     3.4     4.6    +      -       -      +
    324A  LEU*     3.0    37.3    +      -       +      +
    375A  ILE*     3.6    31.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 321 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    245A  LYS      5.4     0.9    -      -       -      -
    300A  MET*     3.0    37.6    +      -       -      +
    301A  LEU*     3.5    27.2    -      -       -      -
    304A  ALA*     3.8     1.5    -      -       -      +
    317A  ASP      2.9    17.8    +      -       -      -
    318A  ILE*     3.2     7.8    +      -       -      -
    320A  MET*     1.3    74.8    -      -       -      +
    322A  LYS*     1.3    61.2    +      -       -      +
    324A  LEU*     3.9     2.1    -      -       -      +
    325A  ILE*     2.8    39.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 322 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    245A  LYS*     3.8    31.1    +      -       +      +
    249A  SER*     3.7    23.8    -      -       -      +
    318A  ILE      2.9    16.8    +      -       -      +
    319A  ALA*     3.8     3.6    -      -       -      +
    321A  SER*     1.3    75.8    -      -       -      +
    323A  LEU*     1.3    61.0    +      -       -      +
    325A  ILE*     4.2     0.6    -      -       -      +
    326A  SER*     2.8    30.5    +      -       -      -
    361A  SER      3.0    25.6    +      -       -      -
    362A  ARG      3.5     7.7    +      -       -      -
    364A  PHE*     3.2    21.8    +      -       -      -
    365A  SER*     5.0     0.7    -      -       -      -
    366A  GLY      2.8    24.7    +      -       -      -
    368A  ASN*     3.0    21.5    +      -       -      +
    371A  GLN*     3.9    11.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 323 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    319A  ALA      3.0    15.8    +      -       -      +
    320A  MET*     3.6     5.2    -      -       -      +
    322A  LYS*     1.3    77.0    -      -       -      +
    324A  LEU*     1.3    69.3    +      -       +      +
    326A  SER*     3.3     1.0    +      -       -      -
    327A  GLU*     3.1    39.1    +      -       +      +
    368A  ASN*     3.4    46.0    -      -       +      +
    371A  GLN*     4.3     6.7    -      -       +      +
    372A  LYS*     3.8    35.2    -      -       +      -
    375A  ILE*     4.0    19.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 324 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    296A  GLN*     5.8     1.6    -      -       +      -
    297A  CYS*     4.3     7.2    -      -       +      -
    300A  MET*     3.9    38.1    -      -       +      -
    320A  MET*     3.0    23.2    +      -       +      +
    321A  SER*     4.0     2.0    -      -       -      +
    323A  LEU*     1.3    82.4    -      -       +      +
    325A  ILE*     1.4    64.1    +      -       -      +
    327A  GLU*     4.7     2.5    -      -       +      -
    328A  TYR*     2.8    68.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 325 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    249A  SER*     3.6    38.4    -      -       -      +
    252A  PHE*     3.7    21.1    -      -       +      -
    253A  VAL*     3.6    23.1    -      -       +      +
    256A  LEU*     5.9     0.3    -      -       -      +
    297A  CYS*     3.7    31.4    -      -       +      +
    301A  LEU*     4.1    24.9    -      -       +      -
    321A  SER*     2.8    25.6    +      -       -      +
    322A  LYS      4.2     2.2    -      -       -      +
    324A  LEU*     1.4    75.6    -      -       -      +
    326A  SER*     1.3    58.9    +      -       -      +
    328A  TYR*     3.7     0.9    -      -       -      +
    329A  ALA*     2.8    28.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 326 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    252A  PHE*     5.9     0.2    -      -       -      -
    322A  LYS*     2.8    22.1    +      -       -      -
    323A  LEU      3.3     0.3    +      -       -      -
    325A  ILE*     1.3    77.2    -      -       -      +
    327A  GLU*     1.3    64.0    +      -       -      +
    329A  ALA*     3.3     3.5    +      -       -      +
    330A  VAL*     3.1    28.6    +      -       -      +
    361A  SER*     3.1    44.6    +      -       -      -
    362A  ARG*     3.7     4.9    -      -       -      -
    368A  ASN*     2.9    29.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 327 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    323A  LEU*     3.1    28.4    +      -       +      +
    324A  LEU*     3.9     4.3    -      -       +      +
    326A  SER*     1.3    77.8    +      -       -      +
    328A  TYR*     1.3    65.6    +      -       +      +
    330A  VAL*     3.3     2.9    +      -       -      +
    331A  GLN*     3.0    39.1    +      -       +      +
    362A  ARG*     3.4    28.6    +      -       -      +
    368A  ASN*     2.8    30.6    +      -       -      +
    372A  LYS*     5.7     1.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 328 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    256A  LEU*     4.7     7.9    -      -       +      -
    293A  ARG*     3.4    66.6    -      -       +      +
    296A  GLN*     4.0    21.3    +      -       +      +
    297A  CYS*     3.8    18.6    -      -       +      -
    324A  LEU*     2.8    52.8    +      -       +      +
    325A  ILE*     3.9     3.8    -      -       -      +
    327A  GLU*     1.3    81.0    -      -       +      +
    329A  ALA*     1.3    58.9    +      -       -      +
    331A  GLN*     4.6     2.5    -      -       +      -
    332A  SER*     2.8    36.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 329 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    252A  PHE*     4.4    16.2    -      -       +      +
    256A  LEU*     5.1     9.4    -      -       +      +
    259A  LEU*     5.3     0.2    -      -       -      +
    325A  ILE      2.8    22.7    +      -       -      +
    326A  SER*     3.7     7.2    -      -       -      +
    327A  GLU      3.3     0.2    -      -       -      -
    328A  TYR*     1.3    74.0    -      -       -      +
    330A  VAL*     1.3    61.6    -      -       -      +
    332A  SER*     4.0     3.3    -      -       -      -
    333A  GLY*     3.1    19.8    +      -       -      -
    354A  HIS*     4.7     2.7    +      -       -      +
    358A  MET*     3.8    37.1    -      -       +      +
    361A  SER*     4.6     1.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 330 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    326A  SER      3.1    16.5    +      -       -      +
    327A  GLU      3.8     3.1    -      -       -      +
    329A  ALA*     1.3    74.8    -      -       -      +
    331A  GLN*     1.3    72.8    +      -       +      +
    333A  GLY      3.1     2.3    +      -       -      -
    334A  LEU*     3.1    27.8    +      -       +      +
    355A  LEU*     3.5    21.8    -      -       +      +
    358A  MET*     3.6    30.3    -      -       +      +
    359A  ILE*     4.1    11.0    -      -       +      -
    362A  ARG*     4.0    36.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 331 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    293A  ARG*     3.8    28.7    -      -       -      +
    327A  GLU*     3.0    25.9    +      -       +      +
    328A  TYR*     4.1     3.1    -      -       +      +
    330A  VAL*     1.3    82.7    -      -       +      +
    332A  SER*     1.3    57.9    +      -       -      +
    334A  LEU*     3.3    23.9    +      -       -      +
    335A  ASP*     3.0    33.0    +      -       -      +
    362A  ARG*     5.0     7.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 332 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    256A  LEU*     3.4    32.4    -      -       -      +
    259A  LEU*     3.5     9.6    -      -       -      +
    290A  MET*     3.8    13.0    -      -       -      +
    293A  ARG*     3.1    27.0    +      -       -      +
    328A  TYR      2.8    24.1    +      -       -      -
    329A  ALA      4.1     1.6    -      -       -      -
    331A  GLN*     1.3    74.5    -      -       -      +
    333A  GLY*     1.3    60.3    +      -       -      +
    335A  ASP*     3.7     4.2    -      -       -      +
    336A  ALA*     2.9    25.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 333 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    259A  LEU*     3.9    13.6    -      -       -      +
    329A  ALA      3.1    16.2    +      -       -      -
    330A  VAL      3.1     4.0    +      -       -      -
    332A  SER*     1.3    77.0    -      -       -      +
    334A  LEU*     1.3    60.7    +      -       -      +
    336A  ALA*     3.4     2.4    +      -       -      +
    337A  ILE*     3.1    32.3    +      -       -      +
    351A  LEU      5.1     0.7    -      -       -      +
    354A  HIS*     4.3    11.9    -      -       -      -
    355A  LEU*     4.3    10.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 334 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    330A  VAL*     3.1    20.2    +      -       +      +
    331A  GLN*     3.3    28.2    +      -       -      +
    333A  GLY*     1.3    76.0    -      -       -      +
    335A  ASP*     1.3    59.1    +      -       -      +
    337A  ILE*     3.4    11.1    +      -       +      +
    338A  GLN*     3.0    27.6    +      -       -      +
    355A  LEU*     3.7    27.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 335 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    286A  ARG*     3.8    36.4    +      -       +      +
    289A  ASP*     4.3     2.8    -      -       -      +
    290A  MET*     3.9    15.3    -      -       +      -
    293A  ARG*     2.8    32.8    +      -       -      -
    331A  GLN*     3.0    19.5    +      -       -      +
    332A  SER      3.2     7.4    +      -       -      +
    334A  LEU*     1.3    75.5    -      -       -      +
    336A  ALA*     1.3    63.7    +      -       -      +
    338A  GLN*     3.3     7.4    +      -       -      +
    339A  THR*     2.9    28.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 336 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    259A  LEU*     3.6    26.7    -      -       +      -
    263A  THR*     3.5    26.5    -      -       -      +
    290A  MET*     4.1     2.2    -      -       +      -
    332A  SER      2.9    14.9    +      -       -      +
    333A  GLY      3.8     4.3    -      -       -      +
    335A  ASP*     1.3    72.7    -      -       -      +
    337A  ILE*     1.3    68.8    +      -       +      +
    339A  THR*     3.1    14.4    +      -       -      -
    340A  PHE*     3.2    21.0    +      -       +      -
    351A  LEU*     4.6     8.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 337 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    333A  GLY      3.1    16.2    +      -       -      +
    334A  LEU*     3.5    13.5    -      -       +      +
    335A  ASP      3.3     0.2    -      -       -      -
    336A  ALA*     1.3    77.7    -      -       -      +
    338A  GLN*     1.4    69.3    +      -       -      +
    340A  PHE      3.1    10.6    +      -       -      -
    341A  GLY*     3.1    11.4    +      -       -      +
    344A  ALA*     3.6    24.4    -      -       +      +
    345A  MET*     4.2    13.0    -      -       +      -
    351A  LEU*     4.0    33.7    -      -       +      +
    352A  VAL*     4.2    13.2    -      -       +      -
    355A  LEU*     3.9    27.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 338 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    286A  ARG*     3.9    36.8    +      -       -      +
    334A  LEU      3.0    13.7    +      -       -      +
    335A  ASP*     3.7     8.7    -      -       -      +
    336A  ALA      3.2     0.2    -      -       -      -
    337A  ILE*     1.4    83.6    -      -       -      +
    339A  THR*     1.3    62.6    +      -       -      +
    341A  GLY*     3.4    13.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 339 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    263A  THR*     3.7    29.6    -      -       +      +
    266A  TYR*     3.9     6.9    -      -       +      -
    267A  ALA*     4.3     7.2    -      -       +      -
    277A  ILE*     3.5    32.8    -      -       +      +
    283A  VAL*     4.4     7.4    +      -       +      +
    286A  ARG*     4.5    13.8    +      -       -      +
    287A  ILE*     4.2    20.8    -      -       +      +
    290A  MET*     5.1     0.2    -      -       -      -
    335A  ASP      2.9    16.3    +      -       -      -
    336A  ALA      3.1     8.5    +      -       -      -
    338A  GLN*     1.3    78.2    -      -       -      +
    340A  PHE*     1.3    62.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 340 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    262A  THR*     3.8    23.3    -      -       +      -
    263A  THR*     4.1    21.8    -      -       +      -
    266A  TYR*     3.4    63.1    +      +       +      -
    336A  ALA      3.2    19.2    +      -       -      -
    337A  ILE      3.1     7.6    +      -       -      +
    339A  THR*     1.3    81.9    -      -       -      +
    341A  GLY*     1.3    63.6    +      -       -      +
    342A  GLY      3.5     0.5    +      -       -      -
    343A  ALA*     3.3    20.1    +      -       +      +
    344A  ALA*     3.7    17.5    -      -       +      +
    349A  LEU*     3.8    26.9    -      -       +      -
    351A  LEU*     3.3    22.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 341 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    337A  ILE*     3.1    10.6    +      -       -      +
    338A  GLN*     3.4    11.2    +      -       -      -
    339A  THR      3.4     4.0    +      -       -      -
    340A  PHE*     1.3    76.6    -      -       -      +
    342A  GLY*     1.3    64.3    +      -       -      -
    344A  ALA*     2.9    20.4    +      -       -      +
    345A  MET*     4.4     4.8    +      -       -      +
----------------------------------------------------------
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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