Contacts of the helix formed by residues 421 - 449 (chain M) in PDB entry 4BOG


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 421 (chain M).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    422M  GLY*     1.3    65.2    +      -       -      +
    423M  ILE*     3.5    10.4    -      -       -      +
    424M  ASP*     3.7    14.9    +      -       -      +
    425M  SER*     2.8    25.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 422 (chain M). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    406L  GLU*     3.2    25.9    -      -       -      +
    421M  SER*     1.3    77.5    -      -       -      +
    423M  ILE*     1.3    66.9    +      -       -      +
    424M  ASP      3.1     0.2    -      -       -      -
    425M  SER*     2.9    24.6    +      -       -      -
    426M  THR*     3.0    10.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 423 (chain M). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    405L  VAL*     3.8    14.4    -      -       +      -
    406L  GLU*     4.3     4.0    -      -       +      +
    409L  LYS*     3.1    35.2    -      -       -      +
    421M  SER*     4.7     7.0    -      -       -      +
    422M  GLY*     1.3    76.9    -      -       -      +
    424M  ASP*     1.3    64.0    +      -       +      +
    426M  THR*     3.3     3.6    +      -       -      -
    427M  ASN*     3.1    27.7    +      -       -      +
    376N  ILE*     3.6    40.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 424 (chain M). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    421M  SER*     3.7    17.3    +      -       -      +
    422M  GLY      3.1     0.6    -      -       -      -
    423M  ILE*     1.3    80.5    -      -       +      +
    425M  SER*     1.3    63.7    +      -       -      +
    427M  ASN*     3.4     3.7    +      -       -      +
    428M  TYR*     2.9    41.6    +      -       -      +
    431M  LYS*     4.6    15.4    +      -       -      -
    375N  ALA*     5.8     3.3    -      -       -      +
    376N  ILE*     4.0    15.3    -      -       +      +
    379N  VAL*     5.2     5.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 425 (chain M). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    406L  GLU*     4.7     3.4    -      -       -      -
    421M  SER*     2.8    21.1    +      -       -      -
    422M  GLY*     2.9    16.9    +      -       -      -
    424M  ASP*     1.3    81.4    +      -       -      +
    426M  THR*     1.3    49.9    +      -       -      +
    428M  TYR*     3.3     7.9    +      -       -      +
    429M  ILE*     2.6    33.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 426 (chain M). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    406L  GLU*     3.6     6.4    +      -       -      -
    409L  LYS*     2.6    65.6    -      -       +      +
    412L  ALA*     5.7     1.3    -      -       +      -
    413L  GLU*     4.4     7.5    +      -       +      +
    422M  GLY      3.0    11.6    +      -       -      -
    423M  ILE      3.6     3.6    -      -       -      -
    424M  ASP      3.2     0.2    -      -       -      -
    425M  SER*     1.3    74.9    -      -       -      +
    427M  ASN*     1.3    64.1    +      -       -      +
    429M  ILE*     2.4    46.9    -      -       +      +
    430M  VAL*     3.1     3.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 427 (chain M). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    409L  LYS*     5.0     9.5    -      -       -      +
    423M  ILE*     3.1    15.5    +      -       -      +
    424M  ASP*     4.4     3.1    -      -       -      +
    426M  THR*     1.3    80.0    -      -       -      +
    428M  TYR*     1.3    61.4    +      -       -      +
    430M  VAL*     2.9    20.9    +      -       -      +
    431M  LYS*     2.8    32.0    +      -       -      +
    376N  ILE*     5.3    13.3    +      -       -      +
    379N  VAL*     4.0    36.8    -      -       +      +
    380N  LYS*     5.9     2.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 428 (chain M). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    424M  ASP*     2.9    34.0    +      -       -      +
    425M  SER*     3.5     8.3    -      -       -      +
    426M  THR      3.1     0.2    -      -       -      -
    427M  ASN*     1.3    74.1    -      -       -      +
    429M  ILE*     1.3    57.0    +      -       -      +
    431M  LYS*     3.8    30.7    -      -       +      +
    432M  GLN*     2.7    58.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 429 (chain M). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    412L  ALA*     6.0     2.7    -      -       +      -
    413L  GLU*     4.5    31.6    -      -       +      +
    416L  GLU*     4.9     0.4    -      -       -      +
    425M  SER      2.6    28.8    +      -       -      +
    426M  THR*     2.4    44.0    -      -       +      +
    428M  TYR*     1.3    77.0    -      -       -      +
    430M  VAL*     1.3    64.7    +      -       +      +
    432M  GLN*     3.0    12.2    -      -       -      +
    433M  ILE*     2.8    63.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 430 (chain M). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    416L  GLU*     5.4     2.2    -      -       -      +
    426M  THR*     3.1    17.3    -      -       +      +
    427M  ASN*     3.1    31.9    -      -       -      +
    429M  ILE*     1.3    84.7    -      -       +      +
    431M  LYS*     1.3    53.1    +      -       -      +
    432M  GLN      2.9     1.8    -      -       -      -
    433M  ILE*     3.0    10.1    +      -       +      +
    434M  LYS*     2.4    37.9    +      -       -      +
    379N  VAL*     6.1     1.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 431 (chain M). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    424M  ASP*     4.6    11.7    +      -       -      -
    427M  ASN      2.8    22.2    +      -       -      +
    428M  TYR*     3.7    37.4    -      -       +      +
    430M  VAL*     1.3    72.7    -      -       -      +
    432M  GLN*     1.3    57.8    +      -       -      +
    434M  LYS*     2.8    35.4    -      -       +      +
    435M  GLU*     3.0    17.6    +      -       -      +
    379N  VAL*     3.5    20.2    -      -       +      +
    382N  ILE*     3.3    37.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 432 (chain M). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    428M  TYR*     2.7    37.8    +      -       -      +
    429M  ILE*     3.0    18.3    -      -       -      +
    431M  LYS*     1.3    75.6    -      -       -      +
    433M  ILE*     1.3    64.6    +      -       +      +
    434M  LYS      2.9     1.1    -      -       -      -
    435M  GLU*     4.1     4.4    +      -       -      +
    436M  LYS*     3.0    43.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 433 (chain M). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    413L  GLU*     6.4     0.4    -      -       -      -
    416L  GLU*     2.6    61.0    -      -       +      +
    429M  ILE*     2.8    46.5    +      -       +      +
    430M  VAL*     3.0     9.6    +      -       +      +
    432M  GLN*     1.3    73.1    -      -       +      +
    434M  LYS*     1.3    65.9    +      -       -      +
    436M  LYS*     3.7    19.7    -      -       -      +
    437M  ASN*     3.4    29.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 434 (chain M). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    430M  VAL      2.4    26.7    +      -       -      +
    431M  LYS*     2.8    23.1    -      -       +      +
    432M  GLN      2.9     0.4    -      -       -      -
    433M  ILE*     1.3    72.9    -      -       -      +
    435M  GLU*     1.3   111.0    +      -       +      +
    437M  ASN*     3.5     0.7    +      -       -      +
    438M  ALA*     3.4    21.2    +      -       +      +
    441M  GLU*     4.3     3.5    -      -       -      +
    382N  ILE*     6.1     5.0    -      -       +      +
    386N  MET*     3.5    37.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 435 (chain M). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    431M  LYS*     3.0    15.5    +      -       -      +
    432M  GLN*     4.2     3.8    +      -       -      +
    434M  LYS*     1.3   126.0    +      -       +      +
    436M  LYS*     1.3    54.2    +      -       -      +
    438M  ALA*     2.7    33.1    +      -       -      +
    439M  TYR*     3.0    24.8    +      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 436 (chain M). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    416L  GLU*     5.7     0.4    +      -       -      -
    420L  GLU*     5.8     2.0    +      -       -      -
    432M  GLN*     3.0    37.6    +      -       +      +
    433M  ILE*     3.7    21.8    -      -       -      +
    434M  LYS      3.3     0.2    -      -       -      -
    435M  GLU*     1.3    76.3    -      -       -      +
    437M  ASN*     1.3    68.2    +      -       -      +
    439M  TYR*     3.0    29.4    +      -       -      +
    440M  ASP*     3.5     5.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 437 (chain M). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    420L  GLU*     4.6    20.3    +      -       -      +
    433M  ILE*     3.4    24.6    +      -       +      +
    434M  LYS      4.6     0.2    -      -       -      +
    436M  LYS*     1.3    87.2    -      -       -      +
    438M  ALA*     1.3    55.1    +      -       -      +
    439M  TYR      3.0     1.3    -      -       -      -
    440M  ASP*     2.8    28.7    +      -       -      +
    441M  GLU*     2.6    48.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 438 (chain M). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    434M  LYS*     3.4    12.4    +      -       -      +
    435M  GLU*     2.7    22.6    +      -       -      +
    437M  ASN*     1.3    78.9    -      -       -      +
    439M  TYR*     1.3    65.4    +      -       +      +
    441M  GLU*     2.8    23.4    +      -       -      +
    442M  GLU*     3.1    26.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 439 (chain M). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    435M  GLU*     3.0    41.1    +      -       +      -
    436M  LYS*     3.0    14.5    +      -       -      +
    437M  ASN      3.0     0.2    -      -       -      -
    438M  ALA*     1.3    80.1    -      -       +      +
    440M  ASP*     1.3    50.1    +      -       -      +
    442M  GLU*     3.4     4.4    +      -       -      +
    443M  VAL*     2.7    44.0    +      -       +      +
    446M  TRP*     5.2     0.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 440 (chain M). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    436M  LYS      3.5     3.4    +      -       -      +
    437M  ASN*     2.8    46.9    +      -       -      +
    439M  TYR*     1.3    76.9    -      -       -      +
    441M  GLU*     1.3    59.8    +      -       +      +
    443M  VAL*     2.7    36.0    +      -       -      +
    444M  GLY*     3.3     3.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 441 (chain M). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    434M  LYS      4.3     3.5    -      -       -      +
    437M  ASN*     2.6    43.6    +      -       +      +
    438M  ALA*     2.8    26.2    +      -       -      +
    440M  ASP*     1.3    73.9    -      -       +      +
    442M  GLU*     1.3    59.9    -      -       +      +
    444M  GLY*     3.5     8.7    +      -       -      -
    445M  ASN*     3.7    14.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 442 (chain M). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    438M  ALA      3.1    15.6    +      -       -      +
    439M  TYR*     3.9     4.9    -      -       -      +
    440M  ASP      3.1     0.8    -      -       -      -
    441M  GLU*     1.3    76.8    -      -       +      +
    443M  VAL*     1.3    63.0    +      -       -      +
    444M  GLY      2.8     6.9    +      -       -      -
    445M  ASN*     3.1    17.1    +      -       -      +
    446M  TRP*     2.9    79.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 443 (chain M). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    318M  SER*     4.4    11.7    -      -       -      +
    439M  TYR*     2.7    34.5    +      -       +      +
    440M  ASP*     2.7    21.4    +      -       -      +
    442M  GLU*     1.3    71.2    -      -       -      +
    444M  GLY*     1.3    56.5    +      -       -      +
    446M  TRP*     3.2    30.6    -      -       +      +
    447M  ASN*     2.9    22.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 444 (chain M). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    318M  SER*     4.0    17.7    -      -       -      -
    319M  THR*     3.5     8.6    +      -       -      -
    440M  ASP      3.3     6.4    +      -       -      -
    441M  GLU      3.5     7.1    +      -       -      -
    442M  GLU      2.8     1.6    -      -       -      -
    443M  VAL*     1.3    78.3    -      -       -      +
    445M  ASN*     1.3    57.1    +      -       -      -
    446M  TRP      3.0     4.7    -      -       -      -
    447M  ASN*     3.0     8.5    +      -       -      +
    448M  LEU*     3.0    22.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 445 (chain M). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    441M  GLU      3.7    11.1    +      -       -      +
    442M  GLU*     3.1    23.1    +      -       +      +
    444M  GLY*     1.3    73.5    -      -       -      +
    446M  TRP*     1.3    67.4    +      -       +      +
    448M  LEU*     2.7    53.6    -      -       +      +
    449M  VAL      4.1     2.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with TRP 446 (chain M). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    439M  TYR      5.2     0.4    +      -       -      -
    442M  GLU*     2.9    47.1    +      -       +      +
    443M  VAL*     3.2    40.1    -      -       +      +
    445M  ASN*     1.3    81.7    -      -       +      +
    447M  ASN*     1.3    62.0    +      -       -      +
    449M  VAL*     4.2     8.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 447 (chain M). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    316M  THR*     2.5    34.6    +      -       +      -
    317M  PRO*     2.9    24.7    -      -       -      +
    318M  SER*     2.7    36.0    +      -       -      -
    319M  THR      3.8     3.8    -      -       -      +
    443M  VAL*     2.9    20.2    +      -       -      +
    444M  GLY      3.3     5.8    -      -       -      +
    446M  TRP*     1.3    79.5    -      -       -      +
    448M  LEU*     1.3    53.9    +      -       -      +
    449M  VAL*     2.3    38.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 448 (chain M). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    315M  ARG*     3.7    12.5    +      -       -      -
    319M  THR*     2.9    36.2    +      -       +      +
    444M  GLY      3.0     8.6    +      -       -      +
    445M  ASN*     2.7    57.9    -      -       +      +
    447M  ASN*     1.3    72.7    -      -       -      +
    449M  VAL*     1.3    76.3    +      -       -      +
    450M  GLY*     4.6     3.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 449 (chain M). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    315M  ARG*     4.2    10.0    +      -       -      +
    316M  THR*     3.9    10.8    -      -       +      +
    445M  ASN      4.1     3.6    +      -       -      -
    446M  TRP      4.2     6.3    +      -       -      +
    447M  ASN*     2.3    36.4    +      -       -      +
    448M  LEU*     1.3    80.6    -      -       -      +
    450M  GLY*     1.3    56.5    +      -       -      +
    451M  GLN      3.7     0.4    -      -       -      -
    452M  THR*     2.7    54.1    -      -       +      +
    453M  ILE*     4.9     0.9    -      -       -      +
----------------------------------------------------------
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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