Contacts of the helix formed by residues 332 - 355 (chain E) 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 E).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    339D  GLN*     3.6     0.4    -      -       -      +
    270E  TRP*     5.1     6.9    -      -       +      -
    330E  SER*     3.2    10.4    +      -       -      +
    331E  LYS*     1.3    94.1    -      -       -      +
    333E  GLN*     1.3    63.8    +      -       -      +
    334E  LYS      3.2     3.4    -      -       -      +
    335E  THR*     3.6    28.2    +      -       +      -
    336E  ILE*     3.0    29.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 333 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    274D  THR*     4.8     9.3    +      -       -      +
    339D  GLN*     2.8    35.9    +      -       +      +
    343D  THR*     3.2    26.5    +      -       -      +
    289E  LEU*     3.2    26.1    -      -       +      +
    293E  LEU*     3.8    23.0    -      -       -      +
    296E  GLN*     4.9     0.2    -      -       -      +
    327E  PHE*     3.3    38.7    -      -       +      +
    328E  ALA*     3.0    28.6    -      -       -      +
    330E  SER*     3.6     6.5    -      -       -      +
    332E  ASN*     1.3    73.0    -      -       -      +
    334E  LYS*     1.3    59.0    +      -       -      +
    337E  CYS*     3.6     9.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 334 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    338D  GLN*     5.2     3.8    +      -       -      +
    339D  GLN*     4.5     5.4    -      -       +      +
    342D  ASP*     3.6    39.5    +      -       +      +
    512D  LYS*     4.6    12.1    -      -       -      +
    514D  LEU*     5.7     4.5    -      -       -      +
    516D  LYS*     4.4    19.7    -      -       -      +
    285E  VAL*     4.1    24.3    -      -       +      +
    286E  LEU*     4.6     7.4    -      -       +      -
    289E  LEU*     4.6    14.3    -      -       +      +
    332E  ASN*     3.2     0.6    -      -       -      +
    333E  GLN*     1.3    78.1    -      -       -      +
    335E  THR*     1.3    60.5    +      -       -      +
    337E  CYS*     4.0     2.1    -      -       -      -
    338E  GLN*     3.0    34.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 335 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    270E  TRP*     3.6    23.2    -      -       +      -
    332E  ASN*     3.1    31.7    +      -       +      +
    334E  LYS*     1.3    77.5    -      -       -      +
    336E  ILE*     1.3    64.2    +      -       -      +
    338E  GLN*     3.1    15.9    +      -       +      +
    339E  GLN*     3.2    11.6    +      -       -      +
    331F  LYS      5.9     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 336 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    268E  VAL*     3.9    21.1    -      -       +      -
    269E  SER      4.6     0.9    -      -       -      +
    270E  TRP*     3.6    46.2    -      -       +      +
    273E  VAL*     3.6    34.0    -      -       +      +
    274E  THR*     5.3     1.7    +      -       -      -
    327E  PHE*     3.5    25.4    -      -       +      -
    330E  SER*     3.3    26.0    -      -       -      +
    332E  ASN*     3.0    13.7    +      -       +      +
    335E  THR*     1.3    77.4    -      -       -      +
    337E  CYS*     1.3    61.2    +      -       -      +
    338E  GLN      3.4     0.2    +      -       -      -
    339E  GLN*     3.6     4.7    +      -       -      +
    340E  ALA*     3.5    16.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with CYS 337 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    273E  VAL*     4.2    14.4    -      -       -      -
    285E  VAL*     4.3     9.4    -      -       +      +
    288E  LEU*     3.4    15.5    -      -       +      +
    289E  LEU*     3.6    29.6    -      -       +      -
    292E  TYR*     4.7     2.0    -      -       -      -
    327E  PHE*     3.5    30.3    -      -       -      -
    333E  GLN      3.6     9.0    +      -       -      +
    334E  LYS*     4.3     3.1    -      -       -      +
    335E  THR      3.3     0.4    -      -       -      -
    336E  ILE*     1.3    77.3    -      -       -      +
    338E  GLN*     1.3    64.9    +      -       -      +
    340E  ALA*     3.3     9.0    +      -       -      +
    341E  VAL*     3.0    27.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 338 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    514D  LEU*     4.9    12.0    -      -       -      +
    285E  VAL*     3.3    37.7    -      -       +      +
    334E  LYS*     3.0    27.4    +      -       +      +
    335E  THR*     3.1    13.0    +      -       +      +
    337E  CYS*     1.3    77.6    -      -       -      +
    339E  GLN*     1.3    62.9    +      -       -      +
    341E  VAL*     3.1    20.0    +      -       -      +
    342E  ASP*     3.0    38.6    +      -       -      +
    334F  LYS*     5.3     3.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 339 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    270E  TRP*     3.2    30.1    -      -       +      +
    274E  THR*     4.2     9.8    +      -       -      +
    335E  THR      3.2     8.2    +      -       -      +
    336E  ILE      4.0     6.7    -      -       -      +
    338E  GLN*     1.3    78.6    -      -       -      +
    340E  ALA*     1.3    63.6    +      -       -      +
    342E  ASP*     3.2    14.2    +      -       +      +
    343E  THR*     2.9    24.2    +      -       -      +
    289F  LEU*     5.8     0.8    -      -       +      +
    328F  ALA      5.6     0.3    -      -       -      +
    330F  SER      3.1    25.7    +      -       -      +
    331F  LYS      3.3    14.6    +      -       -      -
    332F  ASN*     4.1     0.2    -      -       -      +
    333F  GLN*     3.2    44.6    -      -       +      +
    334F  LYS*     5.4     5.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 340 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    273E  VAL*     4.1     4.7    -      -       +      +
    274E  THR*     4.0    19.9    +      -       -      +
    277E  ALA*     3.6    14.7    -      -       +      +
    288E  LEU*     3.4    16.8    -      -       +      -
    336E  ILE      3.5    10.4    +      -       -      +
    337E  CYS*     3.4    11.7    -      -       -      +
    338E  GLN      3.1     0.4    -      -       -      -
    339E  GLN*     1.3    80.6    -      -       -      +
    341E  VAL*     1.3    61.8    +      -       -      +
    343E  THR*     3.0    11.3    +      -       -      -
    344E  VAL*     2.9    25.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 341 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    282E  CYS      4.3     0.2    -      -       -      -
    283E  ASP*     3.4    30.7    -      -       -      +
    284E  ASP      3.1    30.1    -      -       -      +
    285E  VAL*     3.7    20.6    -      -       +      -
    288E  LEU*     3.9     4.9    -      -       +      -
    337E  CYS      3.0    17.7    -      -       -      +
    338E  GLN*     3.1    10.2    +      -       -      +
    340E  ALA*     1.3    76.3    -      -       -      +
    342E  ASP*     1.3    57.8    +      -       -      +
    344E  VAL*     3.0    11.8    +      -       -      +
    345E  LEU*     2.9    39.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 342 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    338E  GLN*     3.0    35.4    +      -       -      +
    339E  GLN*     3.2    12.4    +      -       +      +
    341E  VAL*     1.3    78.5    -      -       -      +
    343E  THR*     1.3    57.1    +      -       -      +
    345E  LEU*     3.5    10.9    +      -       -      +
    346E  ALA*     2.8    29.9    +      -       -      +
    516E  LYS*     5.9     0.2    -      -       -      -
    286F  LEU*     3.8    24.8    -      -       +      +
    289F  LEU*     4.2    14.1    -      -       +      +
    334F  LYS*     3.9    31.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 343 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    274E  THR*     3.6    24.4    -      -       +      +
    278E  MET*     3.5    30.7    -      -       +      +
    339E  GLN      2.9    14.7    +      -       -      -
    340E  ALA      3.0     9.1    +      -       -      -
    342E  ASP*     1.3    76.9    -      -       -      +
    344E  VAL*     1.3    63.6    +      -       -      +
    346E  ALA*     3.4     6.7    -      -       -      +
    347E  LYS*     3.1    17.0    +      -       -      +
    289F  LEU*     4.9     2.0    -      -       -      +
    293F  LEU*     3.9    22.0    -      -       +      -
    333F  GLN*     3.5    18.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 344 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    277E  ALA*     3.7    28.7    -      -       +      +
    278E  MET*     4.3     8.5    -      -       -      +
    281E  LYS*     3.6    22.0    -      -       +      +
    282E  CYS      3.2    24.5    -      -       -      +
    283E  ASP*     3.9     4.9    -      -       -      +
    340E  ALA      2.9    20.7    +      -       -      +
    341E  VAL      3.0     6.5    +      -       -      +
    343E  THR*     1.3    74.1    -      -       -      +
    345E  LEU*     1.3    65.8    +      -       -      +
    347E  LYS*     3.1    19.7    +      -       +      +
    348E  LYS*     3.3    31.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 345 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    283E  ASP*     3.9    29.6    -      -       +      +
    341E  VAL*     2.9    30.0    +      -       +      +
    342E  ASP*     4.0    10.3    -      -       -      +
    344E  VAL*     1.3    76.4    -      -       -      +
    346E  ALA*     1.3    53.4    +      -       -      +
    348E  LYS*     3.4    15.1    +      -       +      +
    349E  ARG*     2.8    36.5    +      -       -      +
    466E  ASP*     4.9     1.9    -      -       -      +
    511E  LYS*     4.3    25.8    -      -       +      +
    286F  LEU*     4.4    24.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 346 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    342E  ASP      2.8    20.2    +      -       -      +
    343E  THR*     3.4    11.9    -      -       -      +
    344E  VAL      3.1     0.2    -      -       -      -
    345E  LEU*     1.3    75.9    -      -       -      +
    347E  LYS*     1.3    64.6    +      -       -      +
    349E  ARG*     3.1     9.2    +      -       -      +
    350E  VAL*     3.0    29.2    +      -       -      +
    286F  LEU*     3.8    13.9    -      -       -      +
    289F  LEU*     4.3     7.2    -      -       +      -
    290F  GLY*     3.8    23.7    -      -       -      +
    293F  LEU*     4.7     2.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 347 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    278E  MET*     3.9    26.1    -      -       +      +
    343E  THR      3.1    11.7    +      -       -      +
    344E  VAL*     3.1    12.4    +      -       +      +
    346E  ALA*     1.3    77.4    -      -       -      +
    348E  LYS*     1.3    57.1    +      -       +      +
    350E  VAL*     3.0    11.0    +      -       +      +
    351E  ASP*     2.7    56.4    +      -       -      +
    290F  GLY*     5.7     0.7    -      -       -      -
    294F  GLU*     4.7    15.9    +      -       +      +
    297F  TYR*     5.8     3.6    +      -       -      -
    304F  LYS*     5.7     5.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 348 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    281E  LYS*     3.7    23.4    +      -       -      +
    283E  ASP*     4.4    12.4    -      -       +      +
    344E  VAL*     3.3    35.5    +      -       -      +
    345E  LEU*     3.8    17.7    -      -       +      +
    347E  LYS*     1.3    78.1    -      -       +      +
    349E  ARG*     1.3    62.6    +      -       -      +
    351E  ASP*     4.0     8.2    -      -       -      +
    352E  SER*     3.1    27.4    +      -       -      -
    466E  ASP*     4.1    16.1    -      -       +      +
    467E  GLN*     5.5     9.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 349 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    345E  LEU*     2.8    14.2    +      -       -      +
    346E  ALA*     3.2    17.7    -      -       -      +
    348E  LYS*     1.3    77.2    -      -       -      +
    350E  VAL*     1.3    56.7    +      -       -      +
    352E  SER*     3.0    13.9    +      -       -      -
    353E  LEU*     4.0     5.7    -      -       -      +
    465E  ILE*     3.1    17.0    -      -       -      +
    466E  ASP*     3.0    28.6    +      -       -      -
    511E  LYS*     3.5    17.2    -      -       -      +
    516E  LYS*     2.9    35.3    +      -       -      +
    517E  ARG*     3.1    27.4    +      -       -      +
    284F  ASP*     4.6     0.7    -      -       -      -
    286F  LEU*     3.1    37.8    -      -       -      +
    287F  LEU*     3.5    40.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 350 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    346E  ALA      3.0    15.4    +      -       -      +
    347E  LYS*     3.0     9.6    +      -       +      +
    349E  ARG*     1.3    77.4    -      -       +      +
    351E  ASP*     1.3    62.2    +      -       -      +
    352E  SER      3.1     1.6    -      -       -      -
    353E  LEU*     2.9    22.3    +      -       -      +
    354E  GLN*     3.1    42.9    +      -       +      +
    287F  LEU*     4.6     7.6    -      -       +      +
    290F  GLY*     3.7    30.3    -      -       -      +
    291F  MET*     3.7    19.7    -      -       +      +
    294F  GLU*     4.0    11.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 351 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    347E  LYS*     2.7    54.8    +      -       -      +
    348E  LYS*     3.9     7.8    +      -       -      +
    350E  VAL*     1.3    77.8    -      -       -      +
    352E  SER*     1.3    57.9    +      -       -      +
    353E  LEU      3.0     5.2    +      -       -      -
    354E  GLN*     4.5     3.1    -      -       -      +
    355E  LEU*     3.3    56.7    +      -       +      +
    360E  MET*     4.0     8.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 352 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    348E  LYS      3.1    11.8    +      -       -      -
    349E  ARG      3.0    18.7    +      -       -      -
    351E  ASP*     1.3    75.4    -      -       -      +
    353E  LEU*     1.3    63.2    +      -       -      +
    355E  LEU      4.9     2.7    -      -       -      -
    360E  MET*     4.2    20.9    -      -       -      +
    466E  ASP*     3.1    38.5    +      -       -      -
    467E  GLN      5.5     1.3    -      -       -      -
    517E  ARG*     4.1     5.0    +      -       -      -
    519E  GLN*     4.6     3.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 353 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    349E  ARG      4.0     5.2    -      -       -      +
    350E  VAL*     2.9     7.0    +      -       +      +
    351E  ASP      4.2     0.2    -      -       -      -
    352E  SER*     1.3    88.2    -      -       -      +
    354E  GLN*     1.3    68.1    +      -       +      +
    355E  LEU      4.6     2.9    -      -       -      +
    517E  ARG*     3.2    32.8    -      -       -      +
    519E  GLN*     6.0     2.7    -      -       +      -
    287F  LEU*     3.6    30.7    -      -       +      -
    291F  MET*     5.9     3.1    -      -       -      -
    310F  GLN*     4.7    10.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 354 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    350E  VAL*     3.1    37.6    +      -       +      +
    351E  ASP*     5.0     2.0    -      -       -      +
    353E  LEU*     1.3    82.1    -      -       +      +
    355E  LEU*     1.3    68.7    +      -       +      +
    356E  THR*     3.5     5.7    +      -       -      +
    359E  GLN*     4.7     1.2    -      -       -      +
    291F  MET*     4.0    11.6    -      -       +      +
    294F  GLU*     3.2    22.6    +      -       -      -
    304F  LYS*     3.6    27.4    -      -       -      +
    309F  GLU*     4.6     6.3    -      -       +      +
    310F  GLN*     3.6    39.6    +      -       +      +
    313F  HIS*     5.5     2.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 355 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    351E  ASP*     3.3    47.0    +      -       +      +
    352E  SER      4.9     0.9    -      -       -      +
    353E  LEU      4.6     2.9    -      -       -      +
    354E  GLN*     1.3    83.1    +      -       +      +
    356E  THR*     1.3    69.0    +      -       -      +
    357E  ARG      3.8     0.2    +      -       -      -
    359E  GLN*     3.4    31.2    -      -       +      +
    360E  MET*     3.8    15.3    -      -       +      +
    363E  ASN*     3.6    26.0    -      -       -      +
----------------------------------------------------------
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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