Contacts of the helix formed by residues 332 - 355 (chain K) 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 K).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    339J  GLN*     3.5     0.7    -      -       -      +
    270K  TRP*     5.1     6.3    -      -       +      -
    330K  SER*     3.2    10.8    +      -       -      +
    331K  LYS*     1.3    95.3    -      -       -      +
    333K  GLN*     1.3    63.9    +      -       -      +
    334K  LYS      3.2     3.6    -      -       -      +
    335K  THR*     3.6    28.7    +      -       +      -
    336K  ILE*     3.0    29.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 333 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    274J  THR*     4.6     9.8    +      -       -      +
    339J  GLN*     2.7    34.9    +      -       +      +
    343J  THR*     3.1    27.5    +      -       -      +
    289K  LEU*     3.2    26.5    -      -       +      +
    293K  LEU*     3.8    24.1    -      -       -      +
    327K  PHE*     3.3    39.8    -      -       +      +
    328K  ALA*     3.0    28.6    -      -       -      +
    330K  SER*     3.6     6.2    -      -       -      +
    332K  ASN*     1.3    73.2    -      -       -      +
    334K  LYS*     1.3    58.1    +      -       -      +
    337K  CYS*     3.6     9.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 334 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    338J  GLN*     5.1     4.0    +      -       -      +
    339J  GLN*     4.5     6.3    -      -       +      +
    342J  ASP*     3.4    42.3    +      -       +      +
    512J  LYS*     4.7    11.1    -      -       -      +
    514J  LEU*     5.9     2.8    -      -       -      +
    516J  LYS*     4.5    19.5    -      -       -      +
    285K  VAL*     4.2    24.5    -      -       +      +
    286K  LEU*     4.6     6.7    -      -       +      -
    289K  LEU*     4.6    15.5    -      -       +      +
    332K  ASN*     3.2     0.8    -      -       -      +
    333K  GLN*     1.3    77.4    -      -       -      +
    335K  THR*     1.3    61.2    +      -       -      +
    337K  CYS*     4.3     2.9    -      -       -      +
    338K  GLN*     3.0    34.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 335 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    270K  TRP*     3.6    23.2    -      -       +      -
    332K  ASN*     3.1    31.1    +      -       +      +
    334K  LYS*     1.3    79.4    -      -       -      +
    336K  ILE*     1.3    65.0    -      -       -      +
    338K  GLN*     3.1    16.7    +      -       +      +
    339K  GLN*     3.2    11.1    +      -       -      +
    331L  LYS      5.6     0.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 336 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    268K  VAL*     3.9    20.4    -      -       +      -
    269K  SER      4.6     0.4    -      -       -      +
    270K  TRP*     3.6    45.5    -      -       +      +
    273K  VAL*     3.6    34.2    -      -       +      +
    274K  THR*     5.3     1.6    +      -       -      -
    327K  PHE*     3.5    27.1    -      -       +      -
    330K  SER*     3.3    26.0    -      -       -      +
    332K  ASN*     3.0    14.6    +      -       +      +
    335K  THR*     1.3    77.7    -      -       -      +
    337K  CYS*     1.3    60.9    +      -       -      +
    339K  GLN*     3.6     4.7    +      -       -      +
    340K  ALA*     3.5    16.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with CYS 337 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    273K  VAL*     4.2    13.9    -      -       -      -
    285K  VAL*     4.3     9.6    -      -       +      +
    288K  LEU*     3.4    14.7    -      -       +      +
    289K  LEU*     3.6    30.5    -      -       +      -
    292K  TYR*     4.7     1.8    -      -       -      -
    327K  PHE*     3.5    30.1    -      -       -      -
    333K  GLN      3.6    10.5    +      -       -      +
    334K  LYS*     4.3     3.4    -      -       -      +
    335K  THR      3.3     0.2    -      -       -      -
    336K  ILE*     1.3    76.9    -      -       -      +
    338K  GLN*     1.3    64.6    +      -       -      +
    340K  ALA*     3.3     9.6    +      -       -      +
    341K  VAL*     3.0    28.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 338 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    514J  LEU*     4.9    11.3    -      -       -      +
    285K  VAL*     3.3    38.2    -      -       +      +
    334K  LYS*     3.0    28.3    +      -       +      +
    335K  THR*     3.1    11.6    +      -       +      +
    337K  CYS*     1.3    75.1    -      -       -      +
    339K  GLN*     1.3    64.5    +      -       -      +
    341K  VAL*     3.1    20.6    +      -       -      +
    342K  ASP*     3.0    38.4    +      -       -      +
    334L  LYS*     5.0     4.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 339 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    270K  TRP*     3.2    29.8    -      -       +      +
    274K  THR*     4.2     8.0    +      -       -      -
    335K  THR      3.2     7.7    +      -       -      +
    336K  ILE      4.0     7.2    -      -       -      +
    337K  CYS      3.4     0.2    -      -       -      -
    338K  GLN*     1.3    78.7    +      -       -      +
    340K  ALA*     1.3    62.1    +      -       -      +
    342K  ASP*     3.2    14.1    +      -       +      +
    343K  THR*     2.9    25.7    +      -       -      +
    289L  LEU*     6.3     0.9    -      -       +      -
    330L  SER      3.1    11.9    +      -       -      +
    331L  LYS      3.1    23.2    +      -       -      +
    332L  ASN*     3.7     0.4    -      -       -      +
    333L  GLN*     2.8    54.8    -      -       +      +
    334L  LYS*     4.5     6.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 340 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    273K  VAL*     4.1     4.5    -      -       +      +
    274K  THR*     4.0    20.5    +      -       -      +
    277K  ALA*     3.6    14.2    -      -       +      +
    288K  LEU*     3.4    17.7    -      -       +      -
    336K  ILE      3.5    10.2    +      -       -      +
    337K  CYS*     3.3    12.5    +      -       -      +
    338K  GLN      3.1     0.6    -      -       -      -
    339K  GLN*     1.3    78.8    -      -       -      +
    341K  VAL*     1.3    62.4    +      -       -      +
    343K  THR*     3.0    11.2    +      -       -      -
    344K  VAL*     2.9    26.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 341 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    282K  CYS      4.3     1.1    -      -       -      +
    283K  ASP*     3.5    30.7    -      -       -      +
    284K  ASP      3.1    28.7    -      -       -      +
    285K  VAL*     3.7    21.3    -      -       +      -
    288K  LEU*     3.9     5.4    -      -       +      -
    337K  CYS      3.0    17.5    -      -       -      +
    338K  GLN*     3.1    10.1    +      -       -      +
    340K  ALA*     1.3    76.1    -      -       -      +
    342K  ASP*     1.3    58.7    +      -       -      +
    344K  VAL*     3.0    11.7    +      -       -      +
    345K  LEU*     2.9    38.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 342 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    338K  GLN*     3.0    35.4    +      -       -      +
    339K  GLN*     3.2    12.3    +      -       +      +
    341K  VAL*     1.3    77.4    -      -       -      +
    343K  THR*     1.3    57.3    +      -       -      +
    345K  LEU*     3.8     8.9    -      -       -      +
    346K  ALA*     2.8    30.0    +      -       -      +
    516K  LYS*     5.9     0.2    -      -       -      -
    286L  LEU*     3.6    24.9    -      -       +      +
    289L  LEU*     3.9    11.6    -      -       +      +
    334L  LYS*     3.5    37.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 343 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    274K  THR*     3.6    23.2    -      -       +      +
    278K  MET*     3.5    29.4    -      -       +      +
    339K  GLN      2.9    14.7    +      -       -      -
    340K  ALA      3.0     9.1    +      -       -      -
    342K  ASP*     1.3    75.8    -      -       -      +
    344K  VAL*     1.3    63.8    +      -       -      +
    346K  ALA*     3.4     7.5    -      -       -      +
    347K  LYS*     3.1    16.6    +      -       -      +
    289L  LEU*     4.4     3.6    -      -       -      +
    293L  LEU*     3.6    22.9    -      -       +      -
    333L  GLN*     3.3    20.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 344 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    277K  ALA*     3.7    28.0    -      -       +      +
    278K  MET*     4.3     8.3    -      -       -      +
    281K  LYS*     3.6    22.9    -      -       +      +
    282K  CYS      3.2    23.8    -      -       -      +
    283K  ASP*     3.9     4.5    -      -       -      +
    340K  ALA      2.9    20.7    +      -       -      +
    341K  VAL      3.0     6.3    +      -       -      +
    343K  THR*     1.3    74.5    -      -       -      +
    345K  LEU*     1.3    65.2    +      -       -      +
    347K  LYS*     3.1    19.9    +      -       -      +
    348K  LYS*     3.3    31.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 345 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    283K  ASP*     3.9    30.3    -      -       +      +
    341K  VAL*     2.9    30.4    +      -       +      +
    342K  ASP*     4.0    10.3    -      -       -      +
    344K  VAL*     1.3    76.5    -      -       -      +
    346K  ALA*     1.3    52.3    +      -       -      +
    348K  LYS*     3.4    15.3    +      -       +      +
    349K  ARG*     2.8    36.4    +      -       -      +
    466K  ASP*     4.9     1.2    -      -       -      +
    511K  LYS*     4.3    24.7    -      -       +      +
    286L  LEU*     4.0    24.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 346 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    342K  ASP      2.8    20.6    +      -       -      +
    343K  THR*     3.4    11.9    -      -       -      +
    344K  VAL      3.1     0.2    -      -       -      -
    345K  LEU*     1.3    74.5    -      -       -      +
    347K  LYS*     1.3    64.4    +      -       -      +
    349K  ARG*     3.1     5.5    +      -       -      +
    350K  VAL*     3.0    29.6    +      -       -      +
    286L  LEU*     3.4    26.9    -      -       -      +
    289L  LEU*     4.1     7.4    -      -       +      -
    290L  GLY*     3.6    17.8    -      -       -      +
    293L  LEU*     4.8     0.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 347 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    278K  MET*     3.9    26.9    -      -       +      +
    343K  THR      3.1    11.9    +      -       -      +
    344K  VAL*     3.1    12.0    +      -       +      +
    346K  ALA*     1.3    75.4    -      -       -      +
    348K  LYS*     1.3    57.6    +      -       +      +
    350K  VAL*     3.0    10.7    +      -       +      +
    351K  ASP*     2.7    55.9    +      -       -      +
    290L  GLY*     4.9     1.3    -      -       -      -
    294L  GLU*     4.4    18.9    +      -       +      +
    297L  TYR*     5.8     2.8    +      -       -      -
    304L  LYS*     5.7     4.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 348 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    281K  LYS*     3.7    24.3    +      -       -      +
    283K  ASP*     4.4    11.3    -      -       -      +
    344K  VAL*     3.3    36.2    +      -       -      +
    345K  LEU*     3.8    16.8    -      -       +      +
    347K  LYS*     1.3    77.2    -      -       +      +
    349K  ARG*     1.3    63.1    +      -       -      +
    351K  ASP*     4.0     8.7    -      -       -      +
    352K  SER*     3.1    27.4    +      -       -      -
    466K  ASP*     4.1    16.2    -      -       +      +
    467K  GLN*     5.5     9.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 349 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    345K  LEU*     2.8    18.3    +      -       -      +
    346K  ALA*     3.2    13.9    -      -       -      +
    348K  LYS*     1.3    77.4    -      -       -      +
    350K  VAL*     1.3    57.6    +      -       -      +
    352K  SER*     3.0    13.9    +      -       -      -
    353K  LEU*     4.0     5.7    -      -       -      +
    465K  ILE*     3.1    17.4    -      -       -      +
    466K  ASP*     3.0    29.3    +      -       -      -
    511K  LYS*     3.5    16.6    -      -       -      +
    516K  LYS*     2.9    36.9    +      -       -      +
    517K  ARG*     3.1    27.5    +      -       -      +
    284L  ASP*     4.2     1.0    +      -       -      -
    286L  LEU*     3.2    36.9    -      -       -      +
    287L  LEU*     3.4    40.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 350 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    346K  ALA      3.0    16.0    +      -       -      +
    347K  LYS*     3.0     9.8    +      -       +      +
    349K  ARG*     1.3    77.1    -      -       +      +
    351K  ASP*     1.3    63.7    +      -       -      +
    352K  SER      3.1     1.6    -      -       -      -
    353K  LEU*     2.9    22.6    +      -       +      +
    354K  GLN*     3.1    42.1    +      -       +      +
    287L  LEU*     4.3     9.4    -      -       +      +
    290L  GLY*     3.7     7.6    -      -       -      +
    291L  MET*     3.4    42.4    -      -       +      +
    294L  GLU*     4.2    10.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 351 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    347K  LYS*     2.7    52.1    +      -       -      +
    348K  LYS*     3.9     7.3    +      -       -      +
    350K  VAL*     1.3    78.5    -      -       -      +
    352K  SER*     1.3    57.9    +      -       -      +
    353K  LEU      3.0     4.6    +      -       -      -
    354K  GLN*     4.5     3.5    -      -       -      +
    355K  LEU*     3.3    56.6    +      -       +      +
    360K  MET*     4.0     8.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 352 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    348K  LYS      3.1    12.2    +      -       -      -
    349K  ARG      3.0    18.9    +      -       -      -
    351K  ASP*     1.3    74.4    -      -       -      +
    353K  LEU*     1.3    63.5    +      -       -      +
    355K  LEU      4.9     2.9    -      -       -      +
    360K  MET*     4.2    19.7    -      -       -      +
    466K  ASP*     3.1    38.8    +      -       -      -
    467K  GLN      5.5     1.6    -      -       -      -
    517K  ARG*     4.1     5.4    +      -       -      -
    519K  GLN*     5.1     3.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 353 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    349K  ARG      4.0     3.6    -      -       -      +
    350K  VAL      2.9     6.3    +      -       -      +
    352K  SER*     1.3    88.7    -      -       -      +
    354K  GLN*     1.3    67.3    +      -       +      +
    355K  LEU      4.6     2.1    -      -       -      +
    517K  ARG*     3.2    33.7    -      -       -      +
    519K  GLN*     6.0     2.7    -      -       +      -
    287L  LEU*     3.7    32.1    -      -       +      -
    291L  MET*     6.2     1.3    -      -       -      -
    310L  GLN*     4.9     8.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 354 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    350K  VAL*     3.1    38.1    +      -       +      +
    351K  ASP*     5.0     1.8    -      -       -      -
    353K  LEU*     1.3    81.4    -      -       +      +
    355K  LEU*     1.3    68.8    +      -       +      +
    356K  THR*     3.5     5.9    +      -       -      +
    359K  GLN*     4.6     1.2    -      -       -      +
    291L  MET*     3.7    14.3    -      -       +      +
    294L  GLU*     3.4    20.2    +      -       -      -
    304L  LYS*     3.9    23.2    -      -       -      +
    309L  GLU*     4.9     5.5    -      -       -      +
    310L  GLN*     3.3    43.7    +      -       +      +
    313L  HIS*     5.5     2.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 355 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    351K  ASP*     3.3    48.5    +      -       +      +
    352K  SER      4.9     0.9    -      -       -      -
    353K  LEU      4.6     2.9    -      -       -      +
    354K  GLN*     1.3    83.1    +      -       +      +
    356K  THR*     1.3    69.6    +      -       -      +
    357K  ARG      3.8     0.3    +      -       -      -
    359K  GLN*     3.4    30.7    -      -       +      +
    360K  MET*     3.8    16.2    -      -       +      +
    363K  ASN*     3.6    26.9    -      -       -      +
----------------------------------------------------------
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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