Contacts of the helix formed by residues 276 - 298 (chain R) in PDB entry 1HI0


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 PRO 276 (chain R).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    151R  THR      4.0     1.1    -      -       -      +
    153R  ILE*     3.3    28.0    -      -       +      +
    194R  GLN      4.3     9.4    -      -       -      +
    196R  GLY      3.3    26.7    -      -       -      +
    198R  ALA      3.4    21.3    -      -       -      +
    199R  TYR*     4.6     4.3    -      -       +      -
    274R  GLY      3.9     0.2    -      -       -      -
    275R  GLY*     1.3    79.1    -      -       -      +
    277R  PHE*     1.3    66.0    +      -       -      +
    278R  ALA      3.4     1.3    -      -       -      -
    279R  LEU*     3.1    23.9    +      -       +      -
    280R  ASN*     3.1    12.5    +      -       -      +
    363R  LEU*     4.0    15.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 277 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6F    C      5.1    10.3    -      -       -      -
    143R  LEU*     5.5     1.1    -      -       +      -
    145R  ILE*     4.0    32.8    -      -       +      -
    150R  SER      5.6     1.3    -      -       -      -
    151R  THR*     3.2    45.6    +      -       +      +
    153R  ILE      4.0     2.2    +      -       -      -
    163R  LYS*     3.8    25.8    -      -       +      -
    166R  ILE*     3.3    24.5    -      -       +      -
    167R  ALA*     4.0    13.9    -      -       +      -
    275R  GLY      3.2     4.1    +      -       -      +
    276R  PRO*     1.3    68.0    -      -       -      +
    278R  ALA*     1.3    65.4    +      -       -      +
    279R  LEU      2.9     0.2    +      -       -      -
    280R  ASN*     3.1     6.2    +      -       +      +
    281R  ALA*     2.9    31.2    +      -       +      +
    284R  MET*     4.0    30.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 278 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    153R  ILE      5.4     0.8    +      -       -      -
    154R  PRO*     6.4     0.2    -      -       -      +
    166R  ILE*     4.4    14.2    -      -       +      +
    170R  ALA*     3.3    20.0    -      -       +      +
    193R  HIS      3.2    26.9    -      -       -      +
    194R  GLN*     3.2    23.3    +      -       +      +
    195R  MET*     3.4    11.5    -      -       +      +
    276R  PRO      3.4     0.8    +      -       -      -
    277R  PHE*     1.3    76.5    -      -       -      +
    279R  LEU*     1.3    56.0    +      -       -      +
    282R  PRO*     3.0    20.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 279 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    181R  MET*     4.5     3.8    -      -       +      -
    195R  MET*     4.1    17.0    -      -       +      -
    196R  GLY*     4.1    16.4    -      -       -      +
    199R  TYR*     5.7     1.1    -      -       -      +
    276R  PRO*     3.1    26.1    +      -       +      +
    277R  PHE      3.0     0.6    -      -       -      -
    278R  ALA*     1.3    77.1    -      -       -      +
    280R  ASN*     1.3    67.8    +      -       -      +
    281R  ALA      3.2     2.0    -      -       -      -
    282R  PRO*     3.0    18.1    -      -       -      +
    283R  ILE*     3.6     9.1    -      -       +      +
    356R  LEU*     4.0    43.3    -      -       +      +
    359R  THR*     5.0     2.7    -      -       +      -
    360R  SER*     4.0    30.1    -      -       -      +
    363R  LEU*     4.4    13.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 280 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6F    C      6.2     0.7    -      -       -      -
    199R  TYR*     4.2     4.6    +      -       -      -
    275R  GLY*     3.2    36.9    -      -       -      +
    276R  PRO*     3.1     6.1    +      -       -      +
    277R  PHE*     3.1     9.8    +      -       +      +
    279R  LEU*     1.3    78.3    -      -       -      +
    281R  ALA*     1.3    51.3    +      -       -      +
    283R  ILE*     3.1    12.0    +      -       -      +
    284R  MET*     2.6    53.4    +      -       -      +
    360R  SER*     4.9     1.8    -      -       -      -
    394R  GLY      3.4    12.5    -      -       -      +
    395R  GLN*     3.4    14.5    -      -       -      +
    396R  GLY*     3.1    23.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 281 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    143R  LEU*     4.1    14.4    -      -       +      +
    167R  ALA*     4.2    17.7    -      -       +      +
    170R  ALA*     3.9    16.4    -      -       +      -
    171R  LEU*     4.3     3.6    -      -       +      -
    277R  PHE*     2.9    22.2    +      -       +      +
    280R  ASN*     1.3    75.6    -      -       -      +
    282R  PRO*     1.3    72.0    -      -       +      +
    284R  MET*     3.0    12.4    +      -       -      +
    285R  ALA*     2.9    23.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with PRO 282 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    170R  ALA*     4.1     5.6    -      -       +      -
    171R  LEU*     3.7     6.9    -      -       +      -
    174R  ALA*     3.8    22.0    -      -       +      -
    195R  MET*     4.6     2.5    -      -       +      -
    278R  ALA      3.0    21.8    -      -       -      +
    279R  LEU*     3.0    17.0    -      -       +      +
    281R  ALA*     1.3    92.5    -      -       +      +
    283R  ILE*     1.3    61.7    +      -       +      +
    285R  ALA*     3.6     4.0    -      -       -      +
    286R  VAL*     3.6     2.9    -      -       -      +
    353R  TRP*     3.1    19.3    +      -       -      +
    356R  LEU*     4.4    15.7    -      -       +      -
    657R  PHE*     3.5    34.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 283 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    279R  LEU*     3.6    21.1    -      -       +      +
    280R  ASN*     3.1    16.1    +      -       -      +
    281R  ALA      3.0     0.8    -      -       -      -
    282R  PRO*     1.3    78.1    -      -       +      +
    284R  MET*     1.3    67.0    +      -       -      +
    285R  ALA      3.1     1.3    -      -       -      -
    286R  VAL*     3.0     5.0    +      -       -      +
    287R  ALA*     2.9    19.6    +      -       -      +
    353R  TRP*     4.2    11.1    -      -       +      +
    356R  LEU*     4.4     3.4    -      -       +      +
    357R  PHE*     4.1    37.9    -      -       +      +
    360R  SER*     3.4    35.9    -      -       -      +
    395R  GLN*     4.1     5.4    -      -       -      +
    396R  GLY*     3.8    24.7    -      -       -      -
    397R  ALA*     4.2     3.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with MET 284 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6F    C      4.7    28.0    -      -       -      +
    143R  LEU*     3.6    28.7    -      -       +      -
    144R  LYS      3.8    11.4    -      -       -      +
    145R  ILE*     5.2     2.2    -      -       +      -
    277R  PHE*     4.0    24.7    -      -       +      -
    280R  ASN*     2.6    36.5    +      -       -      +
    281R  ALA*     3.6     4.0    -      -       -      +
    283R  ILE*     1.3    73.5    -      -       -      +
    285R  ALA*     1.3    62.4    +      -       -      +
    286R  VAL      3.0     1.6    +      -       -      -
    287R  ALA*     3.9     7.9    -      -       -      -
    288R  GLN*     3.1    26.7    +      -       -      +
    291R  ARG*     5.1     0.4    +      -       -      +
    396R  GLY*     3.9    20.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 285 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    141R  VAL*     5.3     4.5    +      -       -      +
    143R  LEU*     4.4    14.1    -      -       +      +
    171R  LEU*     4.1    10.8    -      -       +      -
    281R  ALA      2.9    14.9    +      -       -      +
    282R  PRO      3.6     0.4    -      -       -      +
    283R  ILE      3.1     0.2    -      -       -      -
    284R  MET*     1.3    77.7    -      -       -      +
    286R  VAL*     1.3    57.6    +      -       -      +
    288R  GLN*     5.6     0.2    -      -       -      -
    289R  PRO*     3.2    20.8    -      -       -      +
    654R  THR*     5.2     8.4    -      -       -      -
    657R  PHE*     3.5    34.3    -      -       +      -
    658R  LEU*     3.4     9.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 286 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    135R  PHE*     4.5     9.2    -      -       +      -
    138R  LEU*     4.4    11.7    -      -       +      -
    282R  PRO      3.6     4.0    -      -       -      +
    283R  ILE      3.0     1.8    +      -       -      +
    285R  ALA*     1.3    75.6    -      -       -      +
    287R  ALA*     1.3    67.3    +      -       -      +
    288R  GLN      3.3     1.8    -      -       -      -
    289R  PRO*     3.0    14.4    -      -       -      +
    290R  VAL*     3.1    25.5    +      -       +      +
    349R  TYR*     4.5     8.1    -      -       +      -
    353R  TRP*     3.3    53.2    -      -       +      +
    657R  PHE*     4.4     2.7    -      -       +      -
    658R  LEU*     3.9    18.4    -      -       +      -
    661R  VAL*     4.2    10.5    -      -       +      -
    662R  MET*     5.8     0.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 287 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    135R  PHE*     6.2     0.4    -      -       -      -
    283R  ILE      2.9    15.9    +      -       -      +
    284R  MET*     3.7     5.4    -      -       -      +
    286R  VAL*     1.3    78.5    -      -       -      +
    288R  GLN*     1.3    57.5    +      -       -      +
    290R  VAL*     3.0     8.1    +      -       -      +
    291R  ARG*     2.8    42.5    +      -       -      +
    396R  GLY      3.6    23.8    -      -       -      +
    397R  ALA*     4.1    14.1    -      -       +      -
    400R  LEU*     3.6     8.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 288 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    141R  VAL*     3.8    19.3    -      -       +      -
    142R  PRO      5.1     4.9    -      -       -      +
    143R  LEU*     6.4     0.9    -      -       -      -
    144R  LYS*     6.4     1.6    -      -       +      +
    284R  MET      3.1    10.8    +      -       -      +
    285R  ALA*     5.6     0.7    -      -       -      -
    287R  ALA*     1.3    79.5    -      -       -      +
    289R  PRO*     1.3    71.8    -      -       +      +
    291R  ARG*     2.9    45.5    +      -       -      +
    292R  ASN*     2.9    40.7    +      -       -      +
    295R  TYR*     5.8     0.2    -      -       -      -
    633R  THR*     5.0     6.7    +      -       -      -
    634R  GLU*     5.3    14.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with PRO 289 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    138R  LEU*     3.6    31.7    -      -       +      +
    139R  GLU      3.7    18.6    +      -       -      +
    141R  VAL*     3.7    16.8    -      -       +      +
    285R  ALA      3.2    24.0    -      -       -      +
    286R  VAL*     3.0    19.3    -      -       -      +
    288R  GLN*     1.3    89.2    -      -       +      +
    290R  VAL*     1.3    60.9    +      -       -      +
    292R  ASN*     3.3    12.8    +      -       +      +
    293R  LYS*     3.1    18.0    +      -       -      +
    658R  LEU*     4.3    10.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 290 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    134R  MET*     3.7    32.1    -      -       +      +
    135R  PHE*     3.8    29.4    -      -       +      -
    138R  LEU*     3.8    24.0    -      -       +      -
    286R  VAL*     3.1    18.0    +      -       +      +
    287R  ALA*     3.0    10.4    +      -       -      +
    289R  PRO*     1.3    75.2    -      -       -      +
    291R  ARG*     1.3    63.9    +      -       -      +
    293R  LYS*     3.1     4.0    +      -       -      +
    294R  ILE*     3.1    23.8    +      -       +      +
    400R  LEU*     3.7    27.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 291 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6F    C      4.4    10.3    +      -       -      -
    284R  MET*     5.1     0.6    +      -       -      +
    287R  ALA*     2.8    16.8    +      -       -      +
    288R  GLN*     2.9    56.6    +      -       -      +
    290R  VAL*     1.3    78.3    -      -       -      +
    292R  ASN*     1.3    62.2    -      -       -      +
    294R  ILE*     3.5     6.0    +      -       -      +
    295R  TYR*     2.9    55.6    +      -       +      -
    396R  GLY      3.3    23.4    +      -       -      -
    397R  ALA*     4.3     0.4    -      -       -      +
    399R  ASP*     2.7    38.8    +      -       -      -
    400R  LEU*     4.2    13.7    -      -       +      -
    633R  THR*     5.3     2.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 292 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    139R  GLU      4.9     1.0    +      -       -      +
    141R  VAL*     3.7    27.5    -      -       -      +
    288R  GLN*     2.9    41.7    +      -       -      +
    289R  PRO*     3.6    13.6    -      -       +      +
    290R  VAL      3.3     0.2    -      -       -      -
    291R  ARG*     1.3    75.1    -      -       -      +
    293R  LYS*     1.3    53.8    +      -       -      +
    295R  TYR*     3.8     6.0    -      -       -      +
    296R  SER*     2.6    36.4    +      -       -      -
    633R  THR*     5.7     0.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 293 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133R  LEU      3.1    20.4    +      -       -      +
    134R  MET      4.1     3.6    -      -       -      +
    136R  SER*     2.4    30.7    +      -       -      +
    137R  ASP*     2.7    42.4    +      -       -      +
    138R  LEU*     4.0    15.0    -      -       +      -
    289R  PRO      3.1    13.1    +      -       -      +
    290R  VAL      3.6     7.0    -      -       -      +
    292R  ASN*     1.3    76.7    -      -       -      +
    294R  ILE*     1.3    65.7    +      -       +      +
    296R  SER*     2.7    19.2    +      -       -      -
    297R  LYS*     2.9    41.3    +      -       +      +
    298R  TYR*     4.7     3.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 294 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    134R  MET*     3.9    53.2    -      -       +      -
    290R  VAL*     3.1    11.5    +      -       +      +
    291R  ARG      3.5     9.4    -      -       -      +
    293R  LYS*     1.3    77.0    -      -       +      +
    295R  TYR*     1.3    74.7    +      -       +      +
    298R  TYR*     3.0    49.2    +      -       +      +
    302R  PHE*     3.7    30.8    -      -       +      +
    400R  LEU*     4.0    18.4    -      -       +      -
    403R  THR*     5.0     4.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 295 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    291R  ARG*     2.9    47.8    +      -       +      +
    292R  ASN*     4.0     6.7    -      -       -      +
    294R  ILE*     1.3    87.8    -      -       +      +
    296R  SER*     1.3    58.8    +      -       -      +
    299R  ALA*     3.1    21.1    -      -       -      +
    302R  PHE*     3.5    37.9    -      -       +      -
    303R  HIS*     3.2    30.7    -      +       +      +
    399R  ASP*     4.1    12.1    +      -       -      -
    400R  LEU*     5.7     0.9    -      -       -      +
    451R  LYS*     3.1    34.0    +      -       +      +
    633R  THR*     3.8    29.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 296 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    292R  ASN      2.6    23.5    +      -       -      -
    293R  LYS*     2.7    16.5    +      -       -      -
    295R  TYR*     1.3    74.8    -      -       -      +
    297R  LYS*     1.3    68.1    +      -       -      +
    298R  TYR      3.1     0.4    -      -       -      -
    299R  ALA*     2.9    21.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 297 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133R  LEU*     5.5     1.4    -      -       -      +
    137R  ASP*     5.8     1.6    +      -       -      -
    293R  LYS*     2.9    28.0    +      -       +      +
    296R  SER*     1.3    80.1    +      -       -      +
    298R  TYR*     1.3    99.3    +      -       +      +
    299R  ALA      3.4     0.9    +      -       -      -
    437R  ASP*     3.4    14.7    +      -       -      -
    441R  GLN*     3.9    22.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 298 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133R  LEU*     3.4    42.0    +      -       +      +
    293R  LYS*     4.7     4.4    -      -       +      -
    294R  ILE*     3.0    34.2    +      -       +      +
    297R  LYS*     1.3   111.5    +      -       +      +
    299R  ALA*     1.3    63.6    +      -       -      +
    300R  TYR      3.0     5.2    +      -       -      +
    301R  THR      3.1     4.0    +      -       -      -
    302R  PHE*     3.1    31.4    +      -       +      +
    437R  ASP*     2.8    43.7    +      -       -      -
    440R  TRP*     3.5    41.5    -      +       +      -
    441R  GLN*     4.0     9.4    -      -       +      -
----------------------------------------------------------
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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