Contacts of the helix formed by residues 345 - 369 (chain A) in PDB entry 3DRB


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 SER 345 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    107A  LYS*     3.2    29.6    +      -       -      +
    109A  ASP*     3.6    23.9    +      -       -      +
    289A  THR*     3.9     0.9    -      -       -      -
    344A  PHE*     1.3    75.8    -      -       -      +
    346A  GLU*     1.3    68.2    +      -       -      +
    347A  VAL*     3.5     3.8    +      -       -      +
    348A  GLU*     2.8    39.8    +      -       -      +
    349A  LEU*     3.0    21.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 346 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108A  THR*     3.6    11.1    +      -       -      +
    109A  ASP      2.9    30.6    +      -       -      +
    110A  LEU*     3.7    23.6    -      -       +      +
    135A  ARG*     4.3     3.1    +      -       -      +
    250A  PHE*     4.2     7.2    -      -       +      -
    253A  PHE*     4.9     2.0    -      -       +      -
    279A  TYR*     3.8    22.2    -      -       -      -
    289A  THR*     3.6    32.7    -      -       +      +
    291A  LEU*     3.6    27.6    -      -       +      -
    345A  SER*     1.3    71.3    -      -       -      +
    347A  VAL*     1.3    62.8    +      -       -      +
    349A  LEU*     3.3     4.0    +      -       -      +
    350A  VAL*     3.0    28.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 347 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    109A  ASP*     3.4    39.8    +      -       -      +
    111A  ASN      3.4    21.5    -      -       -      +
    114A  ASN*     3.7    31.4    -      -       +      +
    115A  LEU*     4.2     6.8    -      -       +      +
    250A  PHE*     4.0    16.4    -      -       +      -
    345A  SER*     3.5     4.0    +      -       -      +
    346A  GLU*     1.3    78.1    -      -       -      +
    348A  GLU*     1.3    62.5    +      -       +      +
    350A  VAL*     3.4     2.8    +      -       -      +
    351A  GLN*     2.9    30.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 348 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    107A  LYS*     6.0     0.5    -      -       -      +
    343A  GLY      4.4     2.1    -      -       -      +
    344A  PHE*     3.3    24.0    -      -       +      +
    345A  SER*     2.8    47.1    +      -       -      +
    347A  VAL*     1.3    78.9    -      -       +      +
    349A  LEU*     1.3    60.3    +      -       -      +
    351A  GLN*     3.4     7.4    +      -       -      +
    352A  MET*     3.0    35.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 349 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    289A  THR*     3.2    39.5    -      -       +      +
    291A  LEU*     4.2    11.4    -      -       +      -
    293A  ALA*     5.3     0.2    -      -       -      -
    338A  ASN*     3.3    29.5    -      -       +      +
    340A  ASP*     3.6    30.5    -      -       +      +
    341A  ARG      4.3     2.9    -      -       -      +
    344A  PHE*     3.3    35.2    -      -       +      +
    345A  SER      3.0     7.5    +      -       -      +
    346A  GLU*     3.5     7.4    -      -       -      +
    348A  GLU*     1.3    75.3    -      -       -      +
    350A  VAL*     1.3    65.3    +      -       -      +
    352A  MET*     3.2    18.0    +      -       -      +
    353A  VAL*     3.3    17.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 350 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    115A  LEU*     3.8    21.5    -      -       +      -
    131A  VAL*     4.8     1.8    -      -       +      -
    246A  MET*     3.6    33.7    -      -       +      -
    250A  PHE*     3.7    31.4    -      -       +      -
    291A  LEU*     4.4     7.4    -      -       +      -
    293A  ALA*     4.1    22.2    -      -       +      -
    346A  GLU      3.0    17.2    +      -       -      +
    347A  VAL*     4.0     3.4    -      -       -      +
    349A  LEU*     1.3    75.5    -      -       -      +
    351A  GLN*     1.3    62.6    +      -       -      +
    353A  VAL*     3.2     3.4    +      -       -      +
    354A  VAL*     3.0    21.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 351 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    114A  ASN      4.2     2.4    -      -       -      +
    115A  LEU*     3.5    12.1    -      -       +      +
    116A  GLN*     2.8    57.0    +      -       -      +
    347A  VAL*     2.9    20.1    +      -       +      +
    348A  GLU*     3.5     9.6    -      -       -      +
    349A  LEU      3.2     0.2    -      -       -      -
    350A  VAL*     1.3    78.1    -      -       -      +
    352A  MET*     1.3    57.8    +      -       +      +
    354A  VAL*     3.3     7.7    +      -       -      +
    355A  ASP*     2.8    66.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 352 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    315A  LEU      3.2    26.8    -      -       -      +
    316A  ARG*     3.4    33.0    -      -       +      +
    317A  LEU*     3.9    12.9    -      -       +      +
    338A  ASN*     5.5     2.9    -      -       +      -
    340A  ASP*     4.4     7.4    -      -       -      +
    344A  PHE*     4.5    16.8    -      -       -      -
    348A  GLU*     3.0    21.2    +      -       +      +
    349A  LEU*     3.2    13.6    +      -       -      +
    351A  GLN*     1.3    77.1    -      -       +      +
    353A  VAL*     1.3    57.2    +      -       -      +
    355A  ASP*     4.1     5.3    -      -       -      +
    356A  GLY*     2.9    26.3    +      -       -      -
    381A  LYS*     3.6    29.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 353 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121A  LEU*     5.7     0.2    -      -       +      -
    246A  MET*     4.3    20.9    -      -       +      -
    293A  ALA*     3.3    33.0    -      -       +      +
    294A  GLY*     4.5     5.8    -      -       -      -
    295A  VAL*     4.7     1.8    -      -       +      -
    317A  LEU*     4.2     9.2    -      -       +      -
    336A  VAL*     4.7     5.2    -      -       +      +
    337A  SER*     4.2     2.0    -      -       -      -
    338A  ASN*     3.5    23.8    -      -       +      +
    349A  LEU      3.6    12.6    -      -       -      +
    350A  VAL*     3.2     8.6    +      -       -      +
    351A  GLN      3.2     0.6    -      -       -      -
    352A  MET*     1.3    73.1    -      -       -      +
    354A  VAL*     1.3    59.4    +      -       -      +
    357A  VAL*     2.8    54.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 354 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    115A  LEU*     4.5     7.0    -      -       +      -
    116A  GLN      4.4     1.6    -      -       -      +
    118A  GLY*     3.6    37.9    -      -       -      +
    121A  LEU*     4.2    11.2    -      -       +      +
    246A  MET*     3.9    24.0    -      -       +      -
    350A  VAL*     3.0    22.2    +      -       +      +
    351A  GLN*     3.6    15.5    -      -       -      +
    353A  VAL*     1.3    77.1    -      -       +      +
    355A  ASP*     1.3    69.2    +      -       -      +
    357A  VAL*     3.9     2.1    -      -       -      +
    358A  LYS*     3.1    46.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 355 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    315A  LEU*     5.6     0.4    -      -       -      -
    351A  GLN*     2.8    53.2    +      -       -      +
    352A  MET*     4.1     2.5    -      -       -      +
    354A  VAL*     1.3    74.0    -      -       -      +
    356A  GLY*     1.3    67.9    +      -       -      +
    358A  LYS*     3.5    12.0    +      -       -      +
    359A  LEU*     3.4    18.4    +      -       -      +
    381A  LYS*     4.4    17.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 356 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    315A  LEU*     3.8    27.3    -      -       -      +
    317A  LEU*     4.1     7.4    -      -       -      -
    352A  MET      2.9    18.4    +      -       -      -
    353A  VAL      3.8     0.2    -      -       -      -
    355A  ASP*     1.3    75.6    -      -       -      +
    357A  VAL*     1.3    64.4    +      -       -      +
    359A  LEU*     3.0     5.1    +      -       -      +
    360A  LEU*     3.0    29.7    +      -       -      +
    381A  LYS*     5.4     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 357 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121A  LEU*     3.9    20.9    -      -       +      -
    126A  VAL*     4.0    11.7    -      -       +      -
    295A  VAL*     3.8    24.9    -      -       +      -
    297A  ILE*     4.1     9.2    -      -       +      -
    317A  LEU*     4.6     1.7    -      -       +      +
    336A  VAL*     5.2     5.2    -      -       +      -
    353A  VAL*     2.8    41.7    +      -       +      +
    354A  VAL      3.9     3.1    -      -       -      +
    356A  GLY*     1.3    71.3    -      -       -      +
    358A  LYS*     1.3    59.8    +      -       -      +
    360A  LEU*     3.0    17.0    +      -       +      +
    361A  ILE*     2.9    46.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 358 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    116A  GLN      5.7     1.4    +      -       -      -
    117A  GLY*     5.8     2.8    -      -       -      -
    118A  GLY      5.3     4.2    -      -       -      +
    120A  ASP*     5.0    11.6    +      -       -      +
    121A  LEU*     4.0    17.7    -      -       +      -
    354A  VAL*     3.1    37.2    +      -       +      +
    355A  ASP*     3.8    11.5    +      -       -      +
    356A  GLY      3.3     0.2    -      -       -      -
    357A  VAL*     1.3    76.8    -      -       -      +
    359A  LEU*     1.3    60.8    +      -       -      +
    361A  ILE*     3.6    10.2    +      -       +      +
    362A  GLU*     3.2    27.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 359 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    315A  LEU*     4.1    16.4    -      -       +      -
    355A  ASP      3.4     8.3    +      -       -      +
    356A  GLY*     3.0    10.5    +      -       -      +
    358A  LYS*     1.3    76.9    -      -       -      +
    360A  LEU*     1.3    67.6    +      -       -      +
    362A  GLU*     3.1    24.2    +      -       +      +
    363A  MET*     3.0    35.3    +      -       +      +
    376A  LEU*     3.7    29.2    -      -       +      +
    378A  PRO*     3.8    41.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 360 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    297A  ILE*     4.9     4.3    -      -       +      -
    299A  LEU*     4.0    22.8    -      -       +      +
    302A  LEU*     3.8    23.0    -      -       +      +
    308A  PHE*     4.7     0.7    -      -       +      -
    311A  VAL*     4.0    15.9    -      -       +      -
    312A  LEU*     3.9    25.4    -      -       +      -
    315A  LEU*     3.4    24.0    -      -       +      -
    317A  LEU*     4.7     1.3    -      -       +      -
    336A  VAL*     4.3    16.4    -      -       +      -
    356A  GLY      3.0    21.9    +      -       -      +
    357A  VAL*     3.0    16.6    +      -       +      +
    359A  LEU*     1.3    77.3    -      -       -      +
    361A  ILE*     1.3    56.5    +      -       -      +
    363A  MET*     3.3     4.6    +      -       -      +
    364A  GLU*     2.9    27.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 361 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121A  LEU*     5.2     1.3    -      -       +      -
    122A  ASP*     3.9    34.1    -      -       +      +
    125A  TYR*     3.6    39.5    -      -       +      -
    126A  VAL*     4.2     4.5    -      -       +      -
    297A  ILE*     4.0    15.5    -      -       +      -
    299A  LEU*     4.8     1.1    -      -       -      -
    357A  VAL*     2.9    36.3    +      -       +      +
    358A  LYS*     3.8    10.8    -      -       +      +
    360A  LEU*     1.3    74.7    -      -       -      +
    362A  GLU*     1.3    64.9    +      -       +      +
    364A  GLU*     3.3     6.9    +      -       -      +
    365A  GLN*     3.0    34.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 362 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    358A  LYS*     3.2    15.6    +      -       -      +
    359A  LEU*     3.1    29.4    +      -       -      +
    361A  ILE*     1.3    78.9    -      -       +      +
    363A  MET*     1.3    61.6    +      -       -      +
    365A  GLN*     3.3    14.5    +      -       -      +
    366A  ARG*     3.1    25.5    +      -       -      +
    376A  LEU*     4.1    21.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with MET 363 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    302A  LEU*     4.1    18.6    -      -       +      -
    311A  VAL*     3.9    23.1    -      -       +      -
    359A  LEU*     3.0    24.6    +      -       +      +
    360A  LEU*     3.6     7.2    -      -       -      +
    362A  GLU*     1.3    72.4    -      -       -      +
    364A  GLU*     1.3    67.4    +      -       -      +
    366A  ARG*     3.1     3.6    +      -       -      +
    367A  LEU*     3.0    28.6    +      -       -      +
    373A  ILE*     3.5    27.3    -      -       +      +
    376A  LEU*     3.6    46.9    -      -       +      +
    377A  MET*     3.8    25.4    -      -       -      +
    378A  PRO*     3.9     9.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 364 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    125A  TYR*     3.6    26.2    -      -       +      -
    298A  LYS      4.3     0.4    -      -       -      +
    299A  LEU*     3.4    25.8    -      -       +      -
    300A  PRO*     3.5     8.9    -      -       +      +
    301A  ASN*     2.7    40.4    +      -       -      -
    302A  LEU*     2.8    32.1    +      -       -      +
    360A  LEU      2.9    14.7    +      -       -      +
    361A  ILE*     3.4    10.8    -      -       -      +
    363A  MET*     1.3    76.1    -      -       -      +
    365A  GLN*     1.3    59.3    +      -       -      +
    367A  LEU*     3.2     6.3    +      -       -      +
    368A  GLU*     2.9    31.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 365 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    122A  ASP*     4.3     8.5    +      -       -      -
    125A  TYR*     3.4    32.5    +      -       +      +
    361A  ILE*     3.0    33.0    +      -       -      +
    362A  GLU*     3.7    13.5    -      -       -      +
    364A  GLU*     1.3    75.7    -      -       -      +
    366A  ARG*     1.3    62.3    +      -       +      +
    368A  GLU*     3.4    16.0    +      -       -      +
    369A  GLN*     3.3    26.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 366 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    362A  GLU      3.1    18.4    +      -       -      +
    363A  MET      3.1     8.5    +      -       -      +
    365A  GLN*     1.3    77.4    -      -       -      +
    367A  LEU*     1.3    57.8    +      -       -      +
    369A  GLN*     3.0    21.5    +      -       -      +
    371A  GLN*     3.0    44.5    +      -       +      +
    372A  ALA      2.9    22.8    +      -       -      +
    373A  ILE*     3.8    11.6    -      -       +      +
    375A  ASP*     2.6    44.4    +      -       -      -
    376A  LEU*     3.5    28.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 367 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    301A  ASN*     3.5    27.4    -      -       +      +
    302A  LEU*     3.4    50.0    -      -       +      +
    305A  HIS*     3.7    27.8    -      -       +      +
    363A  MET      3.0    15.9    +      -       -      +
    364A  GLU      3.2     3.3    +      -       -      +
    366A  ARG*     1.3    74.0    -      -       -      +
    368A  GLU*     1.3    64.2    +      -       -      +
    370A  GLY*     3.0    13.2    +      -       -      -
    371A  GLN      3.5    19.5    -      -       -      +
    372A  ALA*     5.2     0.4    -      -       -      -
    373A  ILE*     3.9    11.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 368 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    125A  TYR*     2.9    38.0    +      -       -      -
    300A  PRO*     6.0     0.5    -      -       -      +
    301A  ASN*     3.5    18.9    +      -       -      +
    364A  GLU*     2.9    27.1    +      -       -      +
    365A  GLN*     3.4    16.7    -      -       -      +
    366A  ARG      3.1     0.4    -      -       -      -
    367A  LEU*     1.3    78.0    -      -       -      +
    369A  GLN*     1.3    67.7    +      -       -      +
    370A  GLY      3.1     4.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 369 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    365A  GLN      3.3    15.9    -      -       -      +
    366A  ARG*     3.0     7.9    +      -       -      +
    368A  GLU*     1.3    82.7    -      -       -      +
    370A  GLY*     1.3    59.3    +      -       -      +
    371A  GLN*     3.1    36.5    +      -       -      +
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


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

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

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