Contacts of the helix formed by residues 332 - 355 (chain H) in PDB entry 4E2I


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 ASN 332 (chain H).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    339G  GLN*     4.0     0.2    -      -       -      +
    270H  TRP*     5.1     7.2    -      -       +      -
    330H  SER*     3.2    10.0    +      -       -      +
    331H  LYS*     1.3    94.1    -      -       -      +
    333H  GLN*     1.3    64.1    +      -       -      +
    334H  LYS      3.2     3.8    -      -       -      +
    335H  THR*     3.6    28.8    +      -       +      -
    336H  ILE*     3.0    29.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 333 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    274G  THR*     5.1     7.3    +      -       -      +
    339G  GLN*     3.0    35.0    +      -       +      +
    343G  THR*     3.5    23.4    +      -       -      +
    289H  LEU*     3.2    26.4    -      -       +      +
    293H  LEU*     3.8    24.9    -      -       -      +
    296H  GLN*     4.9     0.2    -      -       -      +
    327H  PHE*     3.3    39.5    -      -       +      +
    328H  ALA*     3.0    27.7    -      -       -      +
    330H  SER*     3.6     6.5    -      -       -      +
    332H  ASN*     1.3    76.2    -      -       -      +
    334H  LYS*     1.3    60.7    +      -       -      +
    337H  CYS*     3.6    10.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 334 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    338G  GLN*     5.3     3.6    +      -       -      +
    339G  GLN*     4.7     5.8    -      -       +      +
    342G  ASP*     3.8    35.4    +      -       +      +
    512G  LYS*     4.6    11.7    -      -       -      +
    514G  LEU*     5.6     4.3    -      -       -      +
    516G  LYS*     4.5    19.6    -      -       -      +
    285H  VAL*     4.1    25.0    -      -       +      +
    286H  LEU*     4.6     7.2    -      -       +      -
    289H  LEU*     4.5    16.2    -      -       +      -
    332H  ASN      3.2     0.4    -      -       -      -
    333H  GLN*     1.3    77.8    -      -       -      +
    335H  THR*     1.3    60.6    +      -       -      +
    337H  CYS*     4.0     2.4    -      -       -      -
    338H  GLN*     3.0    33.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 335 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    270H  TRP*     3.6    23.7    -      -       +      -
    332H  ASN*     3.1    31.4    +      -       +      +
    334H  LYS*     1.3    77.5    -      -       -      +
    336H  ILE*     1.3    65.6    +      -       -      +
    338H  GLN*     3.1    16.2    +      -       +      +
    339H  GLN*     3.2    11.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 336 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    268H  VAL*     3.9    20.6    -      -       +      -
    269H  SER      4.6     0.4    -      -       -      +
    270H  TRP*     3.6    45.7    -      -       +      +
    273H  VAL*     3.6    33.5    -      -       +      +
    274H  THR*     5.3     1.6    +      -       -      -
    327H  PHE*     3.5    25.6    -      -       +      -
    330H  SER*     3.3    26.5    -      -       -      +
    332H  ASN*     3.0    13.6    +      -       +      +
    335H  THR*     1.3    76.6    -      -       -      +
    337H  CYS*     1.3    62.5    +      -       -      +
    338H  GLN      3.4     0.3    +      -       -      -
    339H  GLN*     3.6     4.9    +      -       -      +
    340H  ALA*     3.5    16.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with CYS 337 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    273H  VAL*     4.2    15.3    -      -       -      -
    285H  VAL*     4.3     8.7    -      -       +      +
    288H  LEU*     3.4    16.0    -      -       +      +
    289H  LEU*     3.6    29.8    -      -       +      -
    292H  TYR*     4.7     1.6    -      -       -      -
    327H  PHE*     3.5    28.7    -      -       -      -
    333H  GLN      3.6    10.1    +      -       -      +
    334H  LYS*     4.3     3.1    -      -       -      +
    335H  THR      3.3     0.4    -      -       -      -
    336H  ILE*     1.3    77.9    -      -       -      +
    338H  GLN*     1.3    64.9    +      -       -      +
    340H  ALA*     3.3     9.6    +      -       -      +
    341H  VAL*     3.0    28.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 338 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    514G  LEU*     4.9    10.3    -      -       -      +
    285H  VAL*     3.2    38.0    -      -       +      +
    334H  LYS*     3.0    27.4    +      -       +      +
    335H  THR*     3.1    13.2    +      -       +      +
    337H  CYS*     1.3    76.8    -      -       -      +
    339H  GLN*     1.3    62.6    +      -       -      +
    341H  VAL*     3.1    21.1    +      -       -      +
    342H  ASP*     3.0    38.3    +      -       -      +
    334I  LYS*     5.2     3.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 339 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    270H  TRP*     3.2    29.9    -      -       +      +
    274H  THR*     4.2     9.9    +      -       -      +
    335H  THR      3.2     7.5    +      -       -      +
    336H  ILE      3.9     7.0    -      -       -      +
    338H  GLN*     1.3    79.0    -      -       -      +
    340H  ALA*     1.3    62.2    +      -       -      +
    342H  ASP*     3.2    13.0    +      -       +      +
    343H  THR*     2.9    24.6    +      -       -      +
    289I  LEU*     6.4     0.7    -      -       +      -
    330I  SER      3.4    11.4    +      -       -      +
    331I  LYS      3.0    24.4    +      -       -      -
    332I  ASN*     3.6     0.8    -      -       -      +
    333I  GLN*     2.9    50.8    -      -       +      +
    334I  LYS*     4.5     8.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 340 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    273H  VAL      4.1     4.0    -      -       -      +
    274H  THR*     3.9    20.6    +      -       -      +
    277H  ALA*     3.6    14.4    -      -       +      +
    288H  LEU*     3.4    17.5    -      -       +      -
    336H  ILE      3.5    10.5    +      -       -      +
    337H  CYS*     3.4    11.4    -      -       -      +
    339H  GLN*     1.3    79.7    -      -       -      +
    341H  VAL*     1.3    62.3    +      -       -      +
    343H  THR*     3.0    11.2    +      -       -      -
    344H  VAL*     2.9    26.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 341 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    282H  CYS      4.3     1.1    -      -       -      -
    283H  ASP*     3.5    30.7    -      -       -      +
    284H  ASP      3.1    28.9    -      -       -      +
    285H  VAL*     3.7    21.5    -      -       +      -
    288H  LEU*     3.9     6.0    -      -       +      +
    337H  CYS      3.0    16.8    -      -       -      +
    338H  GLN*     3.1    10.0    +      -       -      +
    340H  ALA*     1.3    76.9    -      -       -      +
    342H  ASP*     1.3    57.5    +      -       -      +
    344H  VAL*     3.0    11.2    +      -       -      +
    345H  LEU*     2.9    39.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 342 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    338H  GLN*     3.0    34.3    +      -       -      +
    339H  GLN*     3.2    12.4    +      -       +      +
    341H  VAL*     1.3    77.6    -      -       -      +
    343H  THR*     1.3    57.4    +      -       -      +
    345H  LEU*     4.5     9.5    -      -       -      +
    346H  ALA*     2.8    30.0    +      -       -      +
    516H  LYS*     5.9     0.3    -      -       -      -
    286I  LEU*     3.8    22.0    -      -       +      +
    289I  LEU*     4.3     8.1    -      -       +      -
    334I  LYS*     3.4    41.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 343 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    274H  THR*     3.6    23.3    -      -       +      +
    278H  MET*     3.5    29.1    -      -       +      +
    339H  GLN*     2.9    15.3    +      -       -      +
    340H  ALA      3.0     9.5    +      -       -      -
    342H  ASP*     1.3    75.8    -      -       -      +
    344H  VAL*     1.3    62.2    +      -       -      +
    346H  ALA*     3.4     6.6    -      -       -      +
    347H  LYS*     3.1    17.2    +      -       -      +
    289I  LEU*     4.5     5.1    -      -       -      +
    293I  LEU*     3.7    23.5    -      -       +      +
    333I  GLN*     3.4    18.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 344 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    277H  ALA*     3.7    28.0    -      -       +      +
    278H  MET*     4.3     9.0    -      -       -      +
    281H  LYS*     3.6    22.9    -      -       -      +
    282H  CYS      3.1    24.2    -      -       -      +
    283H  ASP*     4.0     5.4    -      -       +      +
    340H  ALA      2.9    16.5    +      -       -      +
    341H  VAL      3.0     6.7    +      -       -      +
    343H  THR*     1.3    74.5    -      -       -      +
    345H  LEU*     1.3    65.6    +      -       -      +
    347H  LYS*     3.1    18.9    +      -       -      +
    348H  LYS*     3.3    32.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 345 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    283H  ASP*     3.9    28.7    -      -       +      +
    341H  VAL*     2.9    31.1    +      -       +      +
    342H  ASP*     4.0    10.3    -      -       -      +
    344H  VAL*     1.3    76.7    -      -       -      +
    346H  ALA*     1.3    51.8    +      -       -      +
    348H  LYS*     3.4    14.9    +      -       +      +
    349H  ARG*     2.8    36.1    +      -       -      +
    466H  ASP*     4.9     1.6    -      -       -      +
    511H  LYS*     4.3    25.1    -      -       +      +
    286I  LEU*     4.0    22.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 346 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    342H  ASP      2.8    19.8    +      -       -      +
    343H  THR*     3.4    12.3    -      -       -      +
    344H  VAL      3.1     0.2    -      -       -      -
    345H  LEU*     1.3    75.7    -      -       -      +
    347H  LYS*     1.3    65.0    +      -       -      +
    349H  ARG*     3.1     5.7    +      -       -      +
    350H  VAL*     3.0    29.0    +      -       -      +
    286I  LEU*     3.4    26.3    -      -       +      +
    289I  LEU*     4.0     8.7    -      -       +      -
    290I  GLY*     3.8    15.3    -      -       -      +
    293I  LEU*     4.9     1.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 347 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    278H  MET*     3.9    26.7    -      -       +      +
    343H  THR      3.1    11.5    +      -       -      +
    344H  VAL*     3.1    12.2    +      -       +      +
    346H  ALA*     1.3    76.7    -      -       -      +
    348H  LYS*     1.3    57.5    +      -       +      +
    350H  VAL*     3.0    10.0    +      -       +      +
    351H  ASP*     2.7    57.2    +      -       -      +
    290I  GLY*     5.1     1.8    -      -       -      -
    294I  GLU*     4.5    18.0    +      -       -      +
    297I  TYR*     5.8     1.8    +      -       -      -
    304I  LYS*     6.0     2.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 348 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    281H  LYS*     3.7    24.1    +      -       -      +
    283H  ASP*     4.4    11.9    -      -       -      +
    344H  VAL*     3.3    35.9    +      -       -      +
    345H  LEU*     3.8    17.7    -      -       +      +
    347H  LYS*     1.3    78.5    -      -       +      +
    349H  ARG*     1.3    62.8    +      -       -      +
    351H  ASP*     4.0     8.5    -      -       -      +
    352H  SER*     3.1    27.9    +      -       -      -
    466H  ASP*     4.1    17.4    -      -       +      +
    467H  GLN*     5.5     9.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 349 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    345H  LEU*     2.8    14.6    +      -       -      +
    346H  ALA*     3.1    16.8    +      -       -      +
    348H  LYS*     1.3    75.8    -      -       -      +
    350H  VAL*     1.3    57.1    +      -       -      +
    352H  SER*     3.0    13.5    +      -       -      -
    353H  LEU*     4.0     6.1    -      -       -      +
    465H  ILE*     3.1    17.0    -      -       -      +
    466H  ASP*     3.0    28.6    +      -       -      -
    511H  LYS*     3.5    18.2    -      -       -      +
    516H  LYS*     2.9    37.3    +      -       -      +
    517H  ARG*     3.1    27.1    +      -       -      +
    284I  ASP*     4.3     2.6    +      -       -      -
    286I  LEU*     3.1    35.3    -      -       -      +
    287I  LEU*     3.5    38.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 350 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    346H  ALA      3.0    16.3    +      -       -      +
    347H  LYS*     3.0     9.8    +      -       +      +
    349H  ARG*     1.3    77.4    -      -       +      +
    351H  ASP*     1.3    61.0    +      -       -      +
    352H  SER      3.1     1.8    -      -       -      -
    353H  LEU*     2.9    21.5    +      -       +      +
    354H  GLN*     3.1    44.0    +      -       +      +
    287I  LEU*     4.2    13.5    -      -       +      +
    290I  GLY*     3.7    25.4    -      -       -      -
    291I  MET*     3.5    21.1    -      -       +      +
    294I  GLU*     4.5     9.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 351 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    347H  LYS*     2.7    52.7    +      -       -      +
    348H  LYS*     3.4     8.1    +      -       -      +
    350H  VAL*     1.3    77.3    -      -       -      +
    352H  SER*     1.3    57.4    +      -       -      +
    353H  LEU      3.0     5.0    +      -       -      -
    354H  GLN*     4.5     3.4    -      -       -      +
    355H  LEU*     3.3    55.6    +      -       +      +
    360H  MET*     4.0     8.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 352 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    348H  LYS      3.1    11.6    +      -       -      -
    349H  ARG      3.0    18.9    +      -       -      -
    351H  ASP*     1.3    75.0    -      -       -      +
    353H  LEU*     1.3    63.8    +      -       -      +
    355H  LEU      4.9     2.2    -      -       -      -
    360H  MET*     4.2    19.5    -      -       -      +
    466H  ASP*     3.1    38.9    +      -       -      -
    467H  GLN      5.5     1.8    -      -       -      -
    517H  ARG*     4.1     5.4    +      -       -      -
    519H  GLN*     4.6     3.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 353 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    349H  ARG      4.0     3.6    -      -       -      +
    350H  VAL*     2.9     6.0    +      -       +      +
    352H  SER*     1.3    88.3    -      -       -      +
    354H  GLN*     1.3    66.9    +      -       +      +
    355H  LEU      3.9     2.8    -      -       -      +
    517H  ARG*     3.2    32.5    -      -       -      +
    519H  GLN*     6.0     2.7    -      -       +      -
    287I  LEU*     3.6    35.2    -      -       +      -
    310I  GLN*     5.2     6.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 354 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    350H  VAL*     3.1    38.5    +      -       +      +
    351H  ASP*     5.0     1.8    -      -       -      +
    353H  LEU*     1.3    81.5    -      -       +      +
    355H  LEU*     1.3    68.2    -      -       +      +
    356H  THR*     3.5     5.7    +      -       -      +
    359H  GLN*     4.6     1.4    -      -       -      +
    291I  MET*     3.4    14.4    -      -       +      +
    294I  GLU*     3.4    21.7    +      -       -      -
    304I  LYS*     4.1    20.0    -      -       -      +
    309I  GLU*     5.2     3.5    -      -       -      +
    310I  GLN*     3.4    45.0    +      -       +      +
    313I  HIS*     5.6     2.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 355 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    351H  ASP*     3.3    49.0    +      -       +      +
    352H  SER      4.9     0.7    -      -       -      -
    353H  LEU      4.6     2.8    -      -       -      -
    354H  GLN*     1.3    83.9    +      -       +      +
    356H  THR*     1.3    70.7    +      -       -      +
    357H  ARG      3.8     0.3    +      -       -      -
    359H  GLN*     3.4    31.4    -      -       +      +
    360H  MET*     3.8    15.3    -      -       +      +
    363H  ASN*     3.6    26.2    -      -       -      +
----------------------------------------------------------
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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