Contacts of the helix formed by residues 250 - 273 (chain D) in PDB entry 2Y0N


Residue contacts within the protein are derived with the CSU software (Sobolev V., Sorokine A., Prilusky J., Abola E.E. and Edelman M. (1999) Automated analysis of interatomic contacts in proteins. Bioinformatics, 15, 327-332). A short description of the analytical approach is given at the end of the page.
For CSU analysis of other PDB entry

Note:
Non-standard 3 letter residue codes indicate a heterogroup. To identify and analyse, use LPC software

Legend:
Dist - nearest distance (Å) between atoms of two residues
Surf - contact surface area (Å2) between two residues
HB   - hydrophilic-hydrophilic contact (hydrogen bond)
Arom - aromatic-aromatic contact
Phob - hydrophobic-hydrophobic contact
DC   - hydrophobic-hydrophilic contact (destabilizing contact)
+/-  - indicates presence/absence of a specific contacts
*    - indicates residues forming contacts  by their side chain
       (including CA atoms)
Residues in contact with ASN 250 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    217D  PHE*     4.0     4.0    -      -       -      -
    246D  PRO      5.1     5.5    +      -       -      -
    247D  ALA      3.8    16.1    -      -       -      +
    248D  GLU      3.3     2.6    -      -       -      -
    249D  LYS*     1.3    74.8    -      -       -      +
    251D  VAL*     1.3    63.7    +      -       -      +
    252D  ASP*     3.1    23.6    +      -       -      +
    253D  LEU*     3.1    17.9    +      -       +      +
    254D  CYS*     3.0    20.6    +      -       -      +
    483D  HIS*     4.1     1.2    +      -       -      -
    553E  VAL      4.1     3.2    +      -       -      -
    554E  THR*     3.4    45.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 251 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    214D  VAL*     5.0     7.4    -      -       +      +
    217D  PHE*     3.6    21.1    -      -       +      -
    218D  ALA*     4.2    26.7    -      -       +      -
    221D  ALA*     5.7     3.8    -      -       +      -
    249D  LYS      3.5     6.5    +      -       -      +
    250D  ASN*     1.3    73.4    +      -       -      +
    252D  ASP*     1.3    72.7    +      -       -      +
    254D  CYS*     3.3     2.6    -      -       +      +
    255D  LYS*     3.1    40.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 252 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    250D  ASN*     3.1    13.3    +      -       -      +
    251D  VAL*     1.3    83.1    -      -       -      +
    253D  LEU*     1.3    65.0    +      -       -      +
    255D  LYS*     3.3    21.4    +      -       -      +
    256D  GLU*     3.3    25.7    +      -       -      +
    554E  THR      4.8     7.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 253 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    247D  ALA      3.6    23.6    -      -       -      +
    248D  GLU*     4.1     6.3    -      -       -      +
    250D  ASN*     3.1    20.7    +      -       +      +
    252D  ASP*     1.3    75.3    -      -       -      +
    254D  CYS*     1.3    64.2    +      -       -      +
    256D  GLU*     3.4     8.6    +      -       -      +
    257D  MET*     3.3    18.0    +      -       -      +
    479D  ALA*     4.4     7.9    -      -       +      -
    483D  HIS*     3.7    15.4    -      -       +      +
    553E  VAL*     4.2    15.7    -      -       +      +
    554E  THR*     3.3    27.8    +      -       -      +
    555E  SER*     3.7     5.8    -      -       -      +
    556E  PHE*     3.4    47.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with CYS 254 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    213D  TYR*     3.5    34.5    -      -       -      -
    214D  VAL*     4.7     9.9    -      -       -      -
    217D  PHE*     3.6    37.0    -      -       +      -
    250D  ASN      3.0    11.4    +      -       -      +
    251D  VAL      3.3    10.3    -      -       -      +
    253D  LEU*     1.3    76.7    -      -       -      +
    255D  LYS*     1.3    63.1    +      -       -      +
    257D  MET*     3.0    14.7    +      -       -      +
    258D  VAL*     3.1    20.1    +      -       -      +
    483D  HIS*     3.8    13.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 255 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    441B  PHE*     3.3    21.0    -      -       -      +
    442B  ASP*     3.2    38.1    +      -       +      +
    443B  GLN*     3.9    16.7    +      -       -      +
    214D  VAL*     4.1    26.5    -      -       +      -
    251D  VAL*     3.1    27.2    +      -       -      +
    252D  ASP*     3.3    22.1    +      -       -      +
    254D  CYS*     1.3    77.0    -      -       -      +
    256D  GLU*     1.3    60.8    +      -       -      +
    258D  VAL*     3.5     9.8    +      -       -      +
    259D  ASP*     3.1    24.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 256 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    443B  GLN*     4.7    10.1    -      -       -      +
    252D  ASP*     3.3    13.4    +      -       -      +
    253D  LEU*     3.6    11.4    -      -       -      +
    254D  CYS      3.2     1.0    -      -       -      -
    255D  LYS*     1.3    74.7    -      -       -      +
    257D  MET*     1.3    66.2    +      -       -      +
    259D  ASP*     3.4     6.2    +      -       -      +
    260D  GLY*     2.9    20.6    +      -       -      -
    554E  THR      4.8     1.2    -      -       -      +
    555E  SER*     3.2    24.3    +      -       -      -
    556E  PHE*     2.9    40.9    +      -       +      -
    557E  PHE*     3.7    35.8    -      -       +      +
    577H  PHE*     4.4     5.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with MET 257 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    213D  TYR*     4.2    17.9    -      -       +      -
    253D  LEU      3.3     8.6    +      -       -      +
    254D  CYS*     3.0    10.8    +      -       -      +
    256D  GLU*     1.3    79.1    -      -       -      +
    258D  VAL*     1.3    81.7    +      -       +      +
    260D  GLY      3.1     2.1    +      -       -      -
    261D  LEU*     2.9    48.5    +      -       +      +
    480D  LEU*     4.4     8.5    -      -       +      -
    483D  HIS*     3.4    40.4    -      -       +      +
    484D  PHE*     3.5    34.1    -      -       +      -
    487D  PHE*     4.5     7.9    -      -       +      -
    556E  PHE*     4.2     4.2    -      -       +      -
    577H  PHE*     3.2    14.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 258 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    441B  PHE*     3.3    17.9    -      -       +      -
    210D  LEU*     3.2    48.8    -      -       +      +
    213D  TYR*     4.3     6.3    -      -       +      -
    214D  VAL*     3.7    21.3    -      -       +      -
    254D  CYS*     3.1    21.9    +      -       -      +
    255D  LYS*     3.8     5.4    -      -       -      +
    256D  GLU      3.3     0.2    -      -       -      -
    257D  MET*     1.3    93.3    -      -       +      +
    259D  ASP*     1.3    62.3    +      -       -      +
    261D  LEU*     3.3     7.8    +      -       -      +
    262D  ARG*     3.2    17.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 259 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    441B  PHE*     3.6    17.0    -      -       +      -
    443B  GLN*     3.5    32.1    -      -       -      +
    255D  LYS      3.1    17.3    +      -       -      +
    256D  GLU*     3.8     3.8    -      -       -      +
    258D  VAL*     1.3    72.9    -      -       -      +
    260D  GLY*     1.3    66.1    +      -       -      +
    262D  ARG*     2.3    42.0    +      -       -      +
    263D  ILE*     3.1    37.4    +      -       -      +
    557E  PHE*     5.7     5.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 260 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    256D  GLU      2.9    12.4    +      -       -      -
    259D  ASP*     1.3    76.3    +      -       -      +
    261D  LEU*     1.3    49.5    +      -       -      +
    263D  ILE*     3.2     5.2    +      -       -      +
    264D  THR*     2.6    39.7    +      -       -      -
    576H  ALA*     4.0     6.5    -      -       -      +
    577H  PHE*     3.3    38.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 261 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    206D  ILE*     6.2     0.2    -      -       -      -
    210D  LEU*     4.4    17.3    -      -       +      -
    257D  MET*     2.9    52.0    +      -       +      +
    258D  VAL*     3.3    10.1    -      -       -      +
    260D  GLY*     1.3    74.3    -      -       -      +
    262D  ARG*     1.3    57.1    +      -       -      +
    264D  THR*     3.8     2.3    -      -       -      -
    265D  PHE*     2.8    33.2    +      -       -      +
    456D  LEU*     4.3     7.9    -      -       +      -
    459D  LEU*     3.9    23.7    -      -       +      +
    460D  PHE*     3.6    35.0    -      -       +      -
    463D  LEU*     4.7     5.8    -      -       +      -
    484D  PHE*     4.4     6.5    -      -       +      -
    487D  PHE*     4.6     4.0    -      -       +      -
    577H  PHE*     3.2    12.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 262 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    440B  GLU*     3.9    21.1    +      -       -      +
    441B  PHE*     3.7    21.4    -      -       +      -
    206D  ILE*     5.1     2.2    -      -       +      -
    207D  ILE*     3.8    19.5    -      -       +      +
    210D  LEU*     3.8    21.3    -      -       +      -
    258D  VAL      3.2     4.0    +      -       -      +
    259D  ASP*     2.3    41.1    +      -       -      +
    261D  LEU*     1.3    76.7    -      -       -      +
    263D  ILE*     1.3    80.7    +      -       -      +
    265D  PHE*     4.4     2.2    -      -       -      -
    266D  ASP*     2.9    50.0    +      -       -      +
    448D  SER*     3.1    13.4    +      -       -      +
    449D  TYR*     5.6     2.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 263 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    259D  ASP*     3.1    36.8    +      -       -      +
    260D  GLY*     3.6     7.6    -      -       -      +
    262D  ARG*     1.3    95.6    -      -       -      +
    264D  THR*     1.3    67.0    +      -       -      +
    265D  PHE      3.2     0.2    +      -       -      -
    266D  ASP*     3.3     9.2    +      -       -      +
    267D  TYR*     3.2    20.1    +      -       +      +
    557E  PHE*     6.3     2.0    -      -       +      -
    574H  VAL*     3.8    28.3    -      -       +      -
    575H  VAL      3.8    20.6    -      -       -      +
    576H  ALA*     4.3     7.0    -      -       +      -
    581H  LEU*     4.4     3.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 264 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    260D  GLY      2.6    29.7    +      -       -      -
    261D  LEU*     3.8     4.0    -      -       -      -
    263D  ILE*     1.3    73.9    -      -       -      +
    265D  PHE*     1.3    52.1    +      -       -      +
    267D  TYR*     3.3     2.1    +      -       -      +
    268D  THR*     2.3    46.0    +      -       -      +
    459D  LEU*     4.3    15.0    -      -       +      -
    463D  LEU*     4.8     4.7    -      -       +      -
    466D  ILE*     4.7    13.9    -      -       +      -
    470D  MET*     5.2     0.9    -      -       +      -
    576H  ALA*     3.5     8.8    -      -       -      +
    577H  PHE*     3.2    25.4    -      -       +      -
    581H  LEU*     4.1    24.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 265 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    206D  ILE*     3.4    33.4    -      -       +      -
    261D  LEU      2.8    22.4    +      -       -      +
    262D  ARG*     4.1     4.9    -      -       -      +
    264D  THR*     1.3    70.5    -      -       -      +
    266D  ASP*     1.3    68.2    +      -       -      +
    267D  TYR      3.0     0.2    +      -       -      -
    268D  THR*     4.2     2.9    -      -       -      -
    269D  LEU*     2.9    55.2    +      -       +      +
    273D  LEU*     4.0    14.1    -      -       +      -
    447D  PRO*     3.6    31.2    -      -       +      -
    448D  SER*     3.9    11.9    -      -       -      -
    451D  TYR*     3.7     9.0    -      -       +      -
    455D  HIS*     3.7    25.8    -      -       +      -
    456D  LEU*     4.3    12.6    -      -       +      -
    459D  LEU*     4.1    13.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 266 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    262D  ARG*     2.9    31.0    +      -       -      +
    263D  ILE*     3.3     7.3    +      -       -      +
    265D  PHE*     1.3    79.6    -      -       -      +
    267D  TYR*     1.3    60.2    +      -       -      +
    270D  PRO*     3.8     6.4    -      -       -      +
    446D  PRO*     3.3    17.0    -      -       +      +
    447D  PRO*     3.1    33.7    -      -       +      +
    448D  SER*     2.8    41.2    +      -       -      -
    449D  TYR*     6.0     0.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 267 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    263D  ILE*     3.2     8.8    +      -       +      +
    264D  THR*     3.8     5.2    -      -       +      +
    265D  PHE      3.1     0.8    -      -       -      -
    266D  ASP*     1.3    78.0    -      -       -      +
    268D  THR*     1.3    72.5    +      -       -      +
    269D  LEU      3.6     0.2    -      -       -      -
    270D  PRO*     3.6    10.7    -      -       -      +
    271D  LEU*     3.6    31.6    -      -       +      +
    572F  LEU*     3.6    35.1    -      -       +      +
    568G  ILE*     5.7     0.3    -      -       -      +
    574H  VAL*     6.0     0.9    -      -       +      -
    581H  LEU*     3.6    24.5    -      -       +      -
    582H  PRO      3.3    21.3    -      -       -      -
    583H  LYS*     3.1    13.8    -      -       -      +
    584H  LEU*     2.9    37.5    +      -       +      -
----------------------------------------------------------
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Residues in contact with THR 268 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    264D  THR*     2.3    38.3    +      -       -      +
    265D  PHE      3.9     1.6    -      -       -      -
    267D  TYR*     1.3    82.8    -      -       -      +
    269D  LEU*     1.3    67.4    +      -       -      +
    271D  LEU*     2.8    17.0    +      -       -      +
    272D  VAL*     2.9    47.8    +      -       +      -
    273D  LEU*     3.8    12.7    +      -       +      -
    459D  LEU*     3.9    16.9    -      -       +      +
    466D  ILE*     4.0    12.5    -      -       +      +
    584H  LEU*     4.5     4.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 269 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    265D  PHE*     2.9    47.5    +      -       +      +
    268D  THR*     1.3    77.0    -      -       -      +
    270D  PRO*     1.4    65.5    -      -       +      +
    271D  LEU      3.0     5.4    +      -       -      -
    273D  LEU*     3.2    30.7    +      -       +      +
    274D  LEU*     3.6    16.1    +      -       +      +
    282D  TYR*     3.8    20.0    -      -       +      -
    447D  PRO*     3.9     9.6    -      -       +      -
    451D  TYR*     3.4    36.8    -      -       +      +
    455D  HIS*     4.0    26.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with PRO 270 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    266D  ASP      3.8    11.7    -      -       -      +
    267D  TYR      3.6    12.1    -      -       -      +
    268D  THR      3.5     3.6    -      -       -      -
    269D  LEU*     1.4    99.2    -      -       +      +
    271D  LEU*     1.3    65.8    +      -       +      +
    274D  LEU*     4.5    16.2    -      -       +      +
    279D  GLN*     5.0     6.2    +      -       -      +
    282D  TYR*     3.3    43.5    -      -       +      +
    447D  PRO*     4.5     1.8    -      -       +      -
    586H  PRO*     5.6     1.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 271 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    267D  TYR*     3.6    46.4    -      -       +      +
    268D  THR*     2.8     8.7    +      -       -      +
    270D  PRO*     1.3    88.8    -      -       +      +
    272D  VAL*     1.3    64.4    +      -       +      +
    273D  LEU      3.9     0.2    -      -       -      -
    274D  LEU*     5.3     1.1    -      -       -      -
    568G  ILE*     6.5     0.2    -      -       +      -
    584H  LEU*     3.4    28.5    -      -       +      +
    586H  PRO*     3.4    31.1    -      -       +      +
    587H  GLN      2.8    30.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 272 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    268D  THR*     2.9    42.9    +      -       +      +
    271D  LEU*     1.3    81.1    -      -       +      +
    273D  LEU*     1.3    59.8    +      -       +      +
    274D  LEU      3.7     0.2    -      -       -      -
    462D  LYS*     3.5    42.0    -      -       +      +
    465D  GLU*     4.9     5.2    -      -       -      +
    466D  ILE*     4.9     0.7    -      -       +      -
    584H  LEU*     4.4    16.2    -      -       +      -
    585H  ALA      5.0     4.5    -      -       -      +
    587H  GLN*     3.3    29.9    -      -       +      +
    589H  PHE*     3.6    21.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 273 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    265D  PHE*     4.0    20.6    -      -       +      -
    268D  THR*     3.8    15.0    -      -       +      -
    269D  LEU*     3.2    33.2    +      -       +      +
    272D  VAL*     1.3    80.9    -      -       +      +
    274D  LEU*     1.3    63.1    +      -       -      +
    455D  HIS*     4.2     3.1    -      -       +      +
    458D  ARG*     3.1    35.9    +      -       +      +
    459D  LEU*     3.7    47.1    -      -       +      +
    462D  LYS*     3.8    27.6    -      -       +      -
    589H  PHE*     3.8    10.8    -      -       +      +
----------------------------------------------------------
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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