Contacts of the helix formed by residues 376 - 400 (chain F) in PDB entry 2AJQ


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 ASP 376 (chain F).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    349F  ALA*     5.2     4.1    +      -       +      +
    374F  VAL*     3.3     5.5    -      -       +      +
    375F  ASP*     1.3    76.4    -      -       -      +
    377F  PRO*     1.3    70.7    -      -       -      +
    378F  GLU*     3.7    12.7    +      -       -      +
    379F  LYS*     3.0    53.7    +      -       +      +
    380F  GLN*     2.8    28.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with PRO 377 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    374F  VAL      5.3     0.4    -      -       -      +
    375F  ASP      3.1    11.6    -      -       -      +
    376F  ASP*     1.3    90.4    -      -       -      +
    378F  GLU*     1.3    68.5    +      -       +      +
    380F  GLN*     3.1     8.5    +      -       +      +
    381F  ALA*     2.9    26.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 378 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    259F  GLU*     4.7     7.6    -      -       -      +
    260F  THR*     3.2    40.1    +      -       +      +
    376F  ASP*     3.3    13.2    -      -       -      +
    377F  PRO*     1.3    83.8    -      -       +      +
    379F  LYS*     1.3    64.6    +      -       -      +
    381F  ALA*     3.2     6.6    +      -       -      +
    382F  ALA*     3.1    21.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 379 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    260F  THR*     4.3    17.7    -      -       +      -
    261F  PHE*     3.8    31.4    -      -       +      -
    345F  LYS      5.6     0.9    -      -       -      -
    346F  LEU*     5.0     2.4    -      -       +      +
    348F  GLU*     4.7    15.1    +      -       -      +
    349F  ALA*     3.8    28.1    -      -       +      +
    374F  VAL*     4.2     9.9    -      -       +      -
    376F  ASP*     3.0    35.1    +      -       +      +
    378F  GLU*     1.3    79.2    -      -       +      +
    380F  GLN*     1.3    63.5    +      -       -      +
    382F  ALA*     3.3    18.5    +      -       -      +
    383F  ILE*     3.5    11.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 380 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    372F  VAL      3.2    17.4    +      -       -      +
    373F  ARG*     3.1    24.1    -      -       -      +
    374F  VAL*     2.9    43.8    +      -       -      +
    376F  ASP      2.8    13.4    +      -       -      +
    377F  PRO*     3.1    11.9    +      -       +      +
    379F  LYS*     1.3    75.9    -      -       -      +
    381F  ALA*     1.3    63.5    +      -       -      +
    383F  ILE*     3.1    34.2    +      -       -      +
    384F  ASP*     4.2     2.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 381 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    377F  PRO      2.9    16.2    +      -       -      +
    378F  GLU*     3.7     6.1    -      -       -      +
    380F  GLN*     1.3    78.1    -      -       -      +
    382F  ALA*     1.3    61.5    +      -       -      +
    383F  ILE      3.5     0.3    +      -       -      -
    384F  ASP*     3.6    16.5    +      -       -      +
    385F  LEU*     3.8    13.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 382 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    257F  LEU*     3.9    18.1    -      -       +      +
    260F  THR*     4.1    12.6    -      -       +      +
    261F  PHE*     4.0    16.4    -      -       +      -
    378F  GLU      3.1    12.2    +      -       -      +
    379F  LYS      3.4    11.7    -      -       -      +
    380F  GLN      3.1     0.6    -      -       -      -
    381F  ALA*     1.3    76.5    -      -       -      +
    383F  ILE*     1.3    66.0    +      -       -      +
    385F  LEU*     2.8    25.4    +      -       +      +
    386F  ILE*     2.9    16.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 383 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    346F  LEU*     4.1    21.3    -      -       +      -
    369F  LEU*     3.5    38.1    -      -       +      +
    370F  GLU*     5.5     0.4    -      -       -      +
    372F  VAL*     3.6    33.2    -      -       +      +
    374F  VAL*     5.1     2.5    -      -       +      -
    379F  LYS      3.7     7.0    -      -       -      +
    380F  GLN*     3.1    39.0    +      -       -      +
    382F  ALA*     1.3    77.9    -      -       -      +
    384F  ASP*     1.3    64.9    +      -       -      +
    386F  ILE*     3.0    14.0    +      -       +      +
    387F  LYS*     3.0    27.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 384 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    370F  GLU*     4.1     7.1    -      -       -      +
    380F  GLN      4.2     1.8    +      -       -      +
    381F  ALA*     3.6    11.5    +      -       -      +
    382F  ALA      3.2     0.6    -      -       -      -
    383F  ILE*     1.3    80.3    -      -       -      +
    385F  LEU*     1.3    61.1    +      -       +      +
    387F  LYS*     2.7    39.3    +      -       -      +
    388F  GLU*     3.1    27.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 385 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    249F  ARG*     4.8     9.2    -      -       -      +
    253F  LEU*     3.8    31.5    -      -       +      +
    256F  LYS*     4.6    23.8    -      -       +      -
    257F  LEU*     4.0    18.3    -      -       +      +
    260F  THR*     5.9     1.6    -      -       -      +
    381F  ALA      3.8    12.3    +      -       -      +
    382F  ALA*     2.8    19.8    +      -       +      +
    384F  ASP*     1.3    79.0    -      -       +      +
    386F  ILE*     1.3    59.2    +      -       -      +
    388F  GLU*     4.6     5.2    -      -       -      +
    389F  TYR*     3.1    27.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 386 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    257F  LEU*     4.0    17.9    -      -       +      -
    261F  PHE*     4.0    24.2    -      -       +      -
    334F  PHE*     4.0    13.0    -      -       +      -
    336F  PRO*     4.3     8.7    -      -       +      +
    342F  ILE*     3.6    43.7    -      -       +      -
    346F  LEU*     5.3     2.2    -      -       +      -
    369F  LEU*     4.6     8.5    -      -       +      -
    382F  ALA      2.9    18.0    +      -       -      +
    383F  ILE*     3.0    18.6    +      -       +      +
    385F  LEU*     1.3    75.4    -      -       -      +
    387F  LYS*     1.3    64.6    +      -       -      +
    389F  TYR*     3.2     6.4    +      -       -      +
    390F  LEU*     2.9    30.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 387 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    366F  ASP*     3.1    29.4    -      -       -      +
    369F  LEU*     3.8    33.2    -      -       +      -
    370F  GLU*     3.6    32.0    +      -       -      +
    383F  ILE*     3.0    17.5    +      -       -      +
    384F  ASP*     2.7    35.5    +      -       -      +
    386F  ILE*     1.3    76.6    -      -       -      +
    388F  GLU*     1.3    62.7    +      -       -      +
    390F  LEU*     3.2    10.5    +      -       +      +
    391F  MET*     3.1    22.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 388 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    249F  ARG*     2.7    50.2    +      -       -      +
    253F  LEU*     3.7    10.9    -      -       +      +
    384F  ASP      3.1    17.5    +      -       -      +
    385F  LEU*     4.0     9.3    -      -       -      +
    387F  LYS*     1.3    76.2    -      -       -      +
    389F  TYR*     1.3    58.9    +      -       -      +
    391F  MET*     3.3    10.7    +      -       -      +
    392F  ILE*     2.8    44.5    +      -       +      +
    447F  TYR*     5.0     3.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 389 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    250F  ARG*     3.7    37.3    -      -       +      +
    253F  LEU*     3.8    26.2    -      -       +      +
    254F  LEU*     4.4    15.3    -      -       +      +
    257F  LEU*     4.5     2.0    -      -       +      -
    335F  ASN*     4.8     2.4    +      -       -      -
    336F  PRO*     3.3    46.3    -      -       +      +
    337F  SER*     3.5    25.4    +      -       -      -
    385F  LEU      3.1    20.1    +      -       -      +
    386F  ILE*     3.2     7.6    +      -       -      +
    388F  GLU*     1.3    77.6    -      -       -      +
    390F  LEU*     1.3    61.1    +      -       -      +
    392F  ILE*     3.1     5.3    +      -       +      +
    393F  GLN*     2.8    40.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 390 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    336F  PRO      3.6    21.8    -      -       -      +
    337F  SER*     4.1    17.3    -      -       -      +
    339F  ARG*     3.5    45.8    -      -       -      +
    342F  ILE*     4.3     3.6    -      -       +      -
    369F  LEU*     4.2    11.4    -      -       +      -
    386F  ILE*     2.9    35.0    +      -       +      +
    387F  LYS*     3.2     6.3    +      -       +      +
    389F  TYR*     1.3    77.1    -      -       +      +
    391F  MET*     1.3    57.0    +      -       -      +
    393F  GLN*     3.4     5.7    +      -       +      +
    394F  LYS*     3.0    28.2    +      -       -      +
    919X    C      6.2     1.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with MET 391 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    246F  LEU*     5.0     0.2    -      -       +      -
    387F  LYS      3.1    13.1    +      -       -      +
    388F  GLU*     3.5    11.0    -      -       -      +
    390F  LEU*     1.3    75.5    -      -       -      +
    392F  ILE*     1.3    79.2    +      -       +      +
    394F  LYS*     3.2    14.3    +      -       -      +
    395F  ARG*     3.1    46.7    +      -       +      +
    446F  PRO*     3.5    29.2    -      -       +      -
    447F  TYR*     3.3    29.8    -      -       +      -
    920X    C      4.9     6.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 392 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    246F  LEU*     3.6    35.0    -      -       +      +
    249F  ARG*     4.3    12.3    -      -       +      -
    250F  ARG*     4.2    11.4    -      -       +      +
    253F  LEU*     4.4     6.7    -      -       +      -
    388F  GLU*     2.8    49.1    +      -       +      +
    389F  TYR*     3.5     9.2    -      -       +      +
    391F  MET*     1.3    80.2    -      -       +      +
    393F  GLN*     1.3    65.5    +      -       -      +
    395F  ARG*     3.2     2.7    +      -       -      +
    396F  ILE*     3.0    35.0    +      -       +      +
    447F  TYR*     4.0    33.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 393 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    250F  ARG*     3.2    44.2    +      -       -      +
    337F  SER*     3.8    19.8    +      -       -      +
    389F  TYR*     2.8    28.8    +      -       +      +
    390F  LEU*     3.6     9.2    -      -       +      +
    392F  ILE*     1.3    78.8    -      -       -      +
    394F  LYS*     1.3    57.8    +      -       -      +
    396F  ILE*     4.3     6.2    -      -       -      +
    397F  GLY*     2.8    27.2    +      -       -      -
    401F  GLU*     4.0     4.4    +      -       -      -
    960Z    A      5.2     0.7    -      -       -      +
    961Z    C      2.9    37.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 394 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    390F  LEU      3.0    16.6    +      -       -      +
    391F  MET*     3.2     7.6    +      -       -      +
    393F  GLN*     1.3    74.9    -      -       -      +
    395F  ARG*     1.3    77.6    +      -       -      +
    397F  GLY*     3.2     1.9    +      -       -      -
    398F  GLN*     2.9    28.9    +      -       +      +
    918X    G      4.6     6.5    -      -       -      +
    919X    C      3.2    69.3    +      -       -      +
    920X    C      3.7    14.5    +      -       -      +
    958Z    G      4.4     6.1    -      -       -      +
    959Z    C      4.8     2.6    +      -       -      -
    960Z    A      4.8    14.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 395 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    242F  LEU*     5.9     0.4    -      -       +      -
    246F  LEU*     4.1    16.4    -      -       +      -
    391F  MET*     3.1    36.6    +      -       +      +
    392F  ILE      3.7     5.4    -      -       -      +
    394F  LYS*     1.3    86.3    -      -       -      +
    396F  ILE*     1.3    57.7    +      -       -      +
    398F  GLN*     3.1     6.6    +      -       -      +
    399F  SER*     2.8    35.3    +      -       -      +
    441F  PRO*     3.8    29.2    -      -       -      +
    445F  SER*     3.9    22.4    +      -       -      -
    446F  PRO*     2.7    35.6    +      -       -      +
    447F  TYR*     4.3     9.6    -      -       +      -
    451F  CYS*     4.4    10.8    -      -       -      -
    920X    C      3.5    39.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 396 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    243F  TYR*     3.8    14.6    -      -       +      -
    246F  LEU*     3.8    24.9    -      -       +      +
    247F  ALA*     4.0    11.0    -      -       -      +
    250F  ARG*     3.8    29.2    -      -       -      +
    392F  ILE*     3.0    37.7    +      -       +      +
    393F  GLN*     3.8     5.4    -      -       -      +
    395F  ARG*     1.3    75.1    -      -       -      +
    397F  GLY*     1.3    59.0    +      -       -      +
    399F  SER*     3.8     6.3    -      -       -      -
    400F  ALA      2.8    26.0    +      -       -      -
    401F  GLU*     3.0    46.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 397 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    393F  GLN      2.8    18.5    +      -       -      -
    394F  LYS*     3.6     2.2    -      -       -      -
    396F  ILE*     1.3    77.9    -      -       -      +
    398F  GLN*     1.3    60.8    +      -       -      +
    401F  GLU*     4.5     0.7    -      -       -      -
    402F  GLY*     2.8    32.4    +      -       -      -
    405F  ALA*     3.8     2.3    -      -       -      +
    960Z    A      3.8    15.6    -      -       -      +
    961Z    C      3.6    19.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 398 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    394F  LYS*     2.9    20.7    +      -       +      +
    395F  ARG*     3.8     5.7    +      -       -      +
    397F  GLY*     1.3    78.2    -      -       -      +
    399F  SER*     1.3    57.9    +      -       -      +
    404F  LYS      4.5     1.3    -      -       -      +
    405F  ALA*     3.2    21.1    -      -       -      +
    406F  TRP*     3.3    40.5    +      -       +      +
    436F  ASN      4.7     0.6    +      -       -      -
    439F  GLN*     2.8    46.4    +      -       -      +
    440F  ILE*     4.0     1.4    -      -       -      +
    441F  PRO*     3.4    21.6    -      -       -      +
    920X    C      4.8     7.4    -      -       -      +
    960Z    A      4.7     6.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with SER 399 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    239F  ILE*     4.0    15.5    +      -       -      +
    242F  LEU*     5.0     6.1    -      -       -      +
    243F  TYR*     5.3     4.3    -      -       -      +
    246F  LEU*     4.8     7.6    -      -       -      +
    395F  ARG*     2.8    29.3    +      -       -      +
    396F  ILE*     3.8     5.2    +      -       -      -
    398F  GLN*     1.3    75.2    -      -       -      +
    400F  ALA*     1.3    63.2    +      -       -      +
    405F  ALA*     3.6     2.2    -      -       -      -
    406F  TRP*     3.6    31.5    +      -       -      +
    407F  LEU*     3.2    30.0    +      -       -      +
    451F  CYS*     5.6     1.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 400 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    243F  TYR*     4.0    34.3    -      -       +      -
    396F  ILE      2.8    14.8    +      -       -      +
    399F  SER*     1.3    81.2    +      -       -      +
    401F  GLU*     1.3    60.6    +      -       +      +
    405F  ALA*     3.4    14.7    -      -       -      +
    407F  LEU*     3.7    25.8    -      -       +      +
    408F  ARG*     3.7    16.6    +      -       -      +
----------------------------------------------------------
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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