Contacts of the helix formed by residues 277 - 301 (chain X) in PDB entry 1FM6


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 VAL 277 (chain X).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    252X  MET*     4.7    17.0    -      -       +      -
    255X  LEU*     3.7    30.3    -      -       +      -
    256X  MET*     5.2    12.6    -      -       +      -
    272X  GLU*     5.9     3.8    -      -       -      +
    274X  SER*     3.0    23.3    -      -       -      +
    275X  LYS      2.5    10.4    +      -       -      +
    276X  GLU*     1.3    71.6    -      -       -      +
    278X  ALA*     1.3    67.5    +      -       -      +
    279X  ILE      3.0     2.2    -      -       -      -
    280X  ARG*     2.9    23.0    +      -       +      +
    281X  ILE*     3.1    18.3    +      -       +      +
    352X  PHE*     5.2     0.4    -      -       +      -
    356X  LEU*     5.0     7.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 278 (chain X). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    275X  LYS      3.5     8.0    +      -       -      +
    276X  GLU*     5.1     3.1    -      -       -      +
    277X  VAL*     1.3    81.5    -      -       -      +
    279X  ILE*     1.3    51.3    +      -       -      +
    281X  ILE*     3.1     5.4    +      -       -      +
    282X  PHE*     2.7    37.1    +      -       -      +
    356X  LEU*     4.1    26.8    -      -       +      +
    357X  ARG*     4.4     5.8    -      -       +      +
    360X  PHE*     3.5    39.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 279 (chain X). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    276X  GLU*     3.9    35.9    -      -       +      +
    277X  VAL      3.0     1.0    -      -       -      +
    278X  ALA*     1.3    79.2    -      -       -      +
    280X  ARG*     1.3    59.4    +      -       +      +
    282X  PHE*     3.5     8.6    +      -       +      +
    283X  GLN*     2.9    55.3    +      -       +      +
    360X  PHE*     4.0    23.3    -      -       +      -
    460X  GLU*     6.0     3.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 280 (chain X). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    263X  LYS*     3.0    47.2    +      -       -      +
    265X  LYS*     3.7    16.6    -      -       -      +
    266X  HIS*     4.5    12.1    -      -       -      +
    267X  ILE      5.9     2.5    -      -       -      -
    277X  VAL*     2.9    16.5    +      -       +      +
    279X  ILE*     1.3    77.8    -      -       +      +
    281X  ILE*     1.3    63.5    +      -       +      +
    283X  GLN*     4.2    22.3    +      -       -      +
    284X  GLY*     3.0    30.1    +      -       -      +
    287X  PHE*     5.1     7.5    -      -       -      -
    504X  BRL      4.9     1.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 281 (chain X). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    255X  LEU*     4.8    13.7    -      -       +      -
    263X  LYS*     5.6     4.9    -      -       -      -
    277X  VAL*     3.1    21.4    +      -       +      +
    278X  ALA*     3.1    10.3    +      -       -      +
    280X  ARG*     1.3    76.6    -      -       +      +
    282X  PHE*     1.3    66.4    +      -       -      +
    284X  GLY*     3.0    11.3    +      -       -      -
    285X  CYS*     3.0    19.0    +      -       -      -
    348X  MET*     3.6    29.2    -      -       +      -
    352X  PHE*     4.6     8.1    -      -       +      -
    353X  LEU*     4.0    21.1    -      -       +      -
    356X  LEU*     4.3    16.4    -      -       +      -
    363X  PHE*     5.1     4.7    -      -       +      -
    504X  BRL      3.8    22.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 282 (chain X). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    278X  ALA      2.7    20.6    +      -       -      +
    279X  ILE*     3.7     9.6    -      -       +      +
    281X  ILE*     1.3    74.8    -      -       -      +
    283X  GLN*     1.3    62.9    +      -       +      +
    285X  CYS*     3.2     6.3    +      -       -      +
    286X  GLN*     3.0    47.7    +      -       -      +
    360X  PHE*     3.9    30.5    -      +       +      -
    363X  PHE*     4.4    25.1    -      +       +      -
    453X  LEU*     4.2    13.5    -      -       +      -
    456X  ILE*     5.0     7.4    -      -       +      -
    463X  MET*     4.4    15.0    -      -       +      -
    464X  SER      5.0     0.4    -      -       -      -
    465X  LEU*     3.7    17.5    -      -       +      -
    504X  BRL      3.0    35.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 283 (chain X). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    279X  ILE*     2.9    43.5    +      -       +      +
    280X  ARG*     3.9    21.9    +      -       -      +
    282X  PHE*     1.3    74.4    -      -       +      +
    284X  GLY*     1.3    60.8    +      -       -      +
    286X  GLN*     3.1    16.4    +      -       -      +
    287X  PHE*     2.8    63.1    +      -       +      -
    464X  SER      6.0     0.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 284 (chain X). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    280X  ARG*     3.0    17.8    +      -       -      +
    281X  ILE      3.0     8.5    +      -       -      -
    283X  GLN*     1.3    77.1    -      -       -      +
    285X  CYS*     1.3    55.6    +      -       -      +
    287X  PHE*     3.2     9.8    +      -       -      +
    288X  ARG*     2.9    29.1    +      -       -      +
    504X  BRL      3.5    26.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with CYS 285 (chain X). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    281X  ILE*     3.0    19.3    +      -       -      -
    282X  PHE      3.5     7.2    -      -       -      +
    284X  GLY*     1.3    75.3    -      -       -      +
    286X  GLN*     1.3    62.5    +      -       -      +
    288X  ARG*     3.2     4.0    +      -       -      +
    289X  SER*     3.0    18.2    +      -       -      -
    363X  PHE*     3.8    18.8    -      -       +      -
    504X  BRL      3.4    89.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 286 (chain X). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    282X  PHE*     3.0    50.0    +      -       +      +
    283X  GLN*     3.4    19.0    -      -       -      +
    285X  CYS*     1.3    74.8    -      -       -      +
    287X  PHE*     1.3    67.8    +      -       +      +
    289X  SER*     3.0     6.1    +      -       -      -
    290X  VAL*     2.9    29.4    +      -       -      +
    464X  SER      4.1     7.1    +      -       -      +
    465X  LEU*     3.4    16.8    -      -       -      +
    466X  HIS*     2.9    32.8    +      -       +      +
    469X  LEU*     3.6    21.5    -      -       +      +
    504X  BRL      4.2    15.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 287 (chain X). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    280X  ARG*     5.1     7.6    -      -       -      -
    283X  GLN*     2.8    54.7    +      -       +      +
    284X  GLY*     3.7     7.6    -      -       -      +
    286X  GLN*     1.3    80.5    -      -       +      +
    288X  ARG*     1.3    65.6    +      -       -      +
    290X  VAL*     3.3     8.2    +      -       +      +
    291X  GLU*     3.2    21.5    +      -       -      +
    466X  HIS*     4.1    28.5    -      +       +      -
----------------------------------------------------------
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Residues in contact with ARG 288 (chain X). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    227X  PRO*     5.9     2.8    -      -       -      +
    228X  LEU*     5.7     8.1    +      -       -      +
    284X  GLY      2.9    14.2    +      -       -      +
    285X  CYS*     3.2    11.6    +      -       -      +
    287X  PHE*     1.3    77.3    -      -       -      +
    289X  SER*     1.3    57.2    +      -       -      +
    291X  GLU*     3.2    28.9    +      -       -      +
    292X  ALA*     3.0    31.7    +      -       +      +
    295X  GLU*     3.8    15.8    +      -       -      -
    326X  ILE*     6.4     0.9    -      -       +      -
    333X  LEU*     5.6     9.5    -      -       -      +
    504X  BRL      4.4    31.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 289 (chain X). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    285X  CYS      3.0     7.4    +      -       -      -
    286X  GLN      3.0     9.2    +      -       -      -
    288X  ARG*     1.3    74.0    -      -       -      +
    290X  VAL*     1.3    66.4    +      -       -      +
    291X  GLU      3.1     1.6    -      -       -      -
    292X  ALA*     2.8    19.4    +      -       -      +
    293X  VAL*     2.8    19.5    +      -       -      +
    326X  ILE*     3.7    15.6    -      -       -      +
    469X  LEU*     4.1     8.5    -      -       -      -
    504X  BRL      3.1    50.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 290 (chain X). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    286X  GLN      2.9    16.4    +      -       -      +
    287X  PHE*     3.3    11.2    +      -       -      +
    289X  SER*     1.3    75.7    -      -       -      +
    291X  GLU*     1.3    63.9    +      -       -      +
    293X  VAL*     3.5     5.9    +      -       -      +
    294X  GLN*     3.4    37.3    +      -       -      +
    466X  HIS*     3.5    50.0    -      -       +      +
    468X  LEU*     4.0    22.6    -      -       +      +
    469X  LEU*     4.4     6.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 291 (chain X). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    227X  PRO*     5.9     2.0    -      -       -      +
    287X  PHE      3.2     8.7    +      -       -      +
    288X  ARG*     3.2    35.6    +      -       -      +
    289X  SER      3.1     0.6    -      -       -      -
    290X  VAL*     1.3    79.6    -      -       -      +
    292X  ALA*     1.3    65.7    +      -       -      +
    294X  GLN*     3.1    26.8    +      -       -      +
    295X  GLU*     3.1    37.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 292 (chain X). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    226X  PHE*     6.2     0.2    -      -       -      -
    288X  ARG*     3.0    27.7    +      -       +      +
    289X  SER*     2.8    10.8    +      -       -      +
    291X  GLU*     1.3    75.5    -      -       -      +
    293X  VAL*     1.3    51.9    +      -       -      +
    295X  GLU*     3.1     9.6    +      -       -      +
    296X  ILE*     2.7    45.9    +      -       +      +
    326X  ILE*     3.6    29.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 293 (chain X). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    289X  SER      2.8    20.8    +      -       -      +
    290X  VAL*     3.6     7.9    -      -       -      +
    291X  GLU      3.3     0.2    -      -       -      -
    292X  ALA*     1.3    74.3    -      -       -      +
    294X  GLN*     1.3    53.1    +      -       -      +
    296X  ILE*     3.7     0.7    -      -       -      +
    297X  THR*     2.6    48.0    +      -       -      +
    318X  LEU*     6.2     0.2    -      -       +      -
    322X  VAL*     3.8    39.2    -      -       +      +
    326X  ILE*     4.6     2.9    -      -       +      -
    468X  LEU*     4.1    15.7    -      -       +      -
    469X  LEU*     5.0     3.4    -      -       +      -
    472X  ILE*     4.0    13.0    -      -       +      -
    690Y  LEU*     3.7    29.8    -      -       +      -
    693Y  LEU*     4.2     4.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 294 (chain X). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    290X  VAL*     3.4    34.9    +      -       -      +
    291X  GLU*     3.1    17.0    +      -       -      +
    293X  VAL*     1.3    78.4    -      -       +      +
    295X  GLU*     1.3    63.8    +      -       +      +
    297X  THR*     3.3     4.8    +      -       -      -
    298X  GLU*     3.0    34.3    +      -       -      +
    468X  LEU*     5.1     3.3    -      -       +      +
    692Y  ARG*     5.1     9.9    -      -       -      +
    693Y  LEU*     4.2    26.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 295 (chain X). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    225X  SER*     3.2    33.2    -      -       -      +
    226X  PHE*     3.8    17.6    -      -       +      -
    227X  PRO*     3.3    26.8    -      -       -      +
    288X  ARG*     3.8    17.1    +      -       -      -
    291X  GLU*     3.2    38.6    -      -       +      +
    292X  ALA*     3.1     7.6    +      -       -      +
    294X  GLN*     1.3    77.3    -      -       +      +
    296X  ILE*     1.3    57.0    +      -       -      +
    298X  GLU*     3.3     8.2    +      -       -      +
    299X  TYR*     2.9    23.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 296 (chain X). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    226X  PHE*     3.9    19.7    -      -       +      -
    292X  ALA*     2.7    28.3    +      -       +      +
    293X  VAL*     3.7     4.3    -      -       -      +
    295X  GLU*     1.3    69.0    -      -       -      +
    297X  THR*     1.3    56.1    +      -       -      +
    299X  TYR*     3.0     1.8    +      -       +      +
    300X  ALA*     2.6    34.1    +      -       -      +
    318X  LEU*     4.8     7.0    -      -       +      -
    322X  VAL*     3.8    34.8    -      -       +      +
    325X  ILE*     3.4    48.9    -      -       +      -
    326X  ILE*     4.0    15.3    -      -       +      -
    329X  MET*     5.2     1.3    -      -       -      -
    388X  ILE*     5.6     0.4    -      -       +      -
    392X  ILE*     4.4     9.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 297 (chain X). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    293X  VAL*     2.6    35.3    +      -       -      +
    294X  GLN*     3.6     5.4    -      -       -      -
    296X  ILE*     1.3    77.2    -      -       -      +
    298X  GLU*     1.3    63.4    +      -       -      +
    300X  ALA*     3.3     7.3    +      -       -      +
    301X  LYS*     3.1    25.7    +      -       -      +
    318X  LEU*     3.9    18.3    -      -       +      +
    322X  VAL*     5.4     0.5    -      -       -      +
    690Y  LEU*     5.1     1.8    -      -       -      +
    693Y  LEU*     3.9    34.9    -      -       +      +
    694Y  LEU*     3.9    26.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 298 (chain X). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    221X  SER*     5.0     0.2    +      -       -      -
    225X  SER*     3.8    13.8    +      -       -      +
    294X  GLN*     3.0    30.3    +      -       -      +
    295X  GLU*     3.5    11.0    -      -       -      +
    296X  ILE      3.2     0.2    -      -       -      -
    297X  THR*     1.3    78.6    -      -       -      +
    299X  TYR*     1.3    62.5    +      -       -      +
    301X  LYS*     2.7    48.3    +      -       -      +
    302X  SER*     3.8     6.4    +      -       -      -
    693Y  LEU*     4.2     8.9    -      -       -      +
    696Y  GLU*     4.4    16.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 299 (chain X). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    218X  LEU*     3.4    29.8    +      -       +      +
    221X  SER*     3.5    15.0    -      -       -      -
    222X  TYR*     3.3    44.6    -      +       +      -
    225X  SER*     3.6     7.8    +      -       -      +
    226X  PHE*     3.7    21.8    -      +       +      -
    295X  GLU      2.9    13.4    +      -       -      +
    296X  ILE*     3.5     5.8    -      -       -      +
    298X  GLU*     1.3    74.0    -      -       -      +
    300X  ALA*     1.3    65.2    +      -       -      +
    301X  LYS      3.0     2.0    -      -       -      -
    302X  SER*     2.6    24.5    +      -       -      -
    303X  ILE*     3.7    20.2    -      -       +      +
    385X  ALA*     2.6    34.8    +      -       -      -
    388X  ILE*     4.3    14.1    -      -       +      -
    389X  ALA*     4.1     3.4    -      -       +      +
    392X  ILE*     4.3    11.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 300 (chain X). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    296X  ILE      2.6    20.7    +      -       -      +
    297X  THR      3.6     5.4    -      -       -      +
    299X  TYR*     1.3    74.3    -      -       -      +
    301X  LYS*     1.3    60.9    +      -       -      +
    303X  ILE*     3.4    18.8    +      -       -      +
    306X  PHE*     3.1    38.8    -      -       +      +
    318X  LEU*     3.9    26.0    -      -       +      -
    392X  ILE*     3.9    14.8    -      -       +      -
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Residues in contact with LYS 301 (chain X). Click here for Legend to table.
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                                  Specific contacts
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     Residue       Dist    Surf   HB    Arom    Phob    DC
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    297X  THR*     3.1    17.4    +      -       -      +
    298X  GLU*     2.7    37.7    +      -       -      +
    299X  TYR      3.0     1.0    -      -       -      -
    300X  ALA*     1.3    78.6    -      -       -      +
    302X  SER*     1.3    59.9    +      -       -      +
    303X  ILE      3.3     3.6    +      -       -      +
    306X  PHE*     4.0     1.3    -      -       +      -
    307X  VAL*     3.4    38.1    -      -       +      +
    693Y  LEU      3.1    22.9    +      -       -      -
    694Y  LEU*     3.4    37.1    +      -       +      +
    696Y  GLU      3.7    13.7    +      -       -      -
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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
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  Atomic class           I  II  III   IV   V   VI  VII  VIII
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   I  (Hydrophilic)      +   +    +    -   +   +    +    +
  II  (Acceptor)         +   -    +    -   +   +    +    -
 III  (Donor)            +   +    -    -   +   +    -    +
  IV  (Hydrophobic)      -   -    -    +   +   +    +    +
   V  (Aromatic)         +   +    +    +   +   +    +    +
  VI  (Neutral)          +   +    +    +   +   +    +    +
 VII  (Neutral-donor)    +   +    -    +   +   +    -    +
VIII  (Neutral-acceptor) +   -    +    +   +   +    +    -
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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