Contacts of the helix formed by residues 250 - 273 (chain C) 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 C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    217C  PHE*     3.7     5.1    -      -       -      -
    246C  PRO      4.4     8.8    +      -       -      +
    247C  ALA*     3.3    21.7    -      -       -      +
    248C  GLU      3.0     4.6    +      -       -      -
    249C  LYS*     1.3    74.5    -      -       -      +
    251C  VAL*     1.3    62.6    +      -       -      +
    252C  ASP*     3.2    15.2    +      -       -      +
    253C  LEU*     3.1    26.1    +      -       +      +
    254C  CYS*     3.1    21.0    +      -       -      +
    483C  HIS*     4.0     1.0    +      -       -      -
    553F  VAL      4.3     3.4    +      -       -      -
    554F  THR*     3.8    35.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 251 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    214C  VAL*     5.0     7.4    -      -       +      +
    217C  PHE*     3.6    20.6    -      -       +      -
    218C  ALA*     4.3    26.7    -      -       +      -
    221C  ALA*     5.5     4.5    -      -       +      -
    249C  LYS      3.6     5.6    +      -       -      +
    250C  ASN*     1.3    72.2    +      -       -      +
    252C  ASP*     1.3    73.3    +      -       -      +
    254C  CYS*     3.3     3.3    -      -       +      +
    255C  LYS*     3.1    40.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 252 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    250C  ASN*     3.2    10.8    +      -       -      +
    251C  VAL*     1.3    83.3    -      -       -      +
    253C  LEU*     1.3    64.6    +      -       -      +
    255C  LYS*     3.3    21.3    +      -       -      +
    256C  GLU*     3.3    26.2    +      -       -      +
    554F  THR*     4.8     7.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 253 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    247C  ALA*     3.6    36.8    -      -       +      +
    250C  ASN*     3.1    22.2    +      -       +      +
    252C  ASP*     1.3    74.2    -      -       -      +
    254C  CYS*     1.3    64.8    +      -       -      +
    256C  GLU*     3.4    10.9    +      -       -      +
    257C  MET*     3.3    17.7    +      -       -      +
    479C  ALA*     4.4     7.0    -      -       +      -
    483C  HIS*     3.7    13.2    -      -       +      +
    553F  VAL*     3.9    10.8    -      -       +      +
    554F  THR      3.2    27.5    +      -       -      +
    555F  SER*     3.8     3.8    -      -       -      +
    556F  PHE*     3.4    49.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with CYS 254 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    213C  TYR*     3.5    35.7    -      -       -      -
    214C  VAL*     4.6     9.6    -      -       -      -
    217C  PHE*     3.6    34.1    -      -       +      -
    250C  ASN      3.1    13.0    +      -       -      +
    251C  VAL      3.3    10.5    -      -       -      +
    253C  LEU*     1.3    76.5    -      -       -      +
    255C  LYS*     1.3    62.6    +      -       -      +
    257C  MET*     3.1    14.4    +      -       -      +
    258C  VAL*     3.1    20.3    +      -       -      +
    483C  HIS*     3.8    14.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 255 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    441A  PHE*     3.4    20.8    -      -       -      +
    442A  ASP*     3.2    38.1    +      -       +      +
    443A  GLN*     3.9    16.9    +      -       -      +
    214C  VAL*     4.1    27.1    -      -       +      -
    251C  VAL*     3.1    27.7    +      -       -      +
    252C  ASP*     3.3    21.9    +      -       -      +
    254C  CYS*     1.3    76.6    -      -       -      +
    256C  GLU*     1.3    60.6    +      -       -      +
    258C  VAL*     3.5     9.8    +      -       -      +
    259C  ASP*     3.1    24.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 256 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    443A  GLN*     4.6    10.5    -      -       -      +
    252C  ASP*     3.3    13.9    +      -       -      +
    253C  LEU*     3.6     8.8    -      -       -      +
    254C  CYS      3.3     1.0    -      -       -      -
    255C  LYS*     1.3    74.0    -      -       -      +
    257C  MET*     1.3    67.0    +      -       -      +
    259C  ASP*     3.4     6.4    +      -       -      +
    260C  GLY*     2.9    20.6    +      -       -      -
    554F  THR      4.8     1.2    -      -       -      +
    555F  SER*     3.4    24.0    +      -       -      -
    556F  PHE*     2.8    47.6    +      -       +      -
    557F  PHE*     3.8    30.7    -      -       +      +
    577G  PHE*     4.4     5.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with MET 257 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    213C  TYR*     4.2    15.9    -      -       +      -
    253C  LEU      3.3     8.7    +      -       -      +
    254C  CYS*     3.1    11.2    +      -       -      +
    256C  GLU*     1.3    78.3    -      -       -      +
    258C  VAL*     1.3    82.1    +      -       +      +
    260C  GLY      3.1     2.3    +      -       -      -
    261C  LEU*     2.9    49.2    +      -       +      +
    480C  LEU*     4.4     4.7    -      -       +      -
    483C  HIS*     3.4    41.1    -      -       +      +
    484C  PHE*     3.5    33.9    -      -       +      -
    487C  PHE*     4.5    10.3    -      -       +      -
    556F  PHE*     4.1     8.4    -      -       +      -
    577G  PHE*     3.2    14.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 258 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    441A  PHE*     3.3    17.9    -      -       +      -
    210C  LEU*     3.2    48.8    -      -       +      +
    213C  TYR*     4.3     6.1    -      -       +      -
    214C  VAL*     3.7    20.6    -      -       +      -
    254C  CYS*     3.1    22.6    +      -       -      +
    255C  LYS*     3.8     5.6    -      -       -      +
    256C  GLU      3.4     0.2    -      -       -      -
    257C  MET*     1.3    92.8    -      -       +      +
    259C  ASP*     1.3    62.6    +      -       -      +
    261C  LEU*     3.3     7.9    +      -       -      +
    262C  ARG*     3.1    17.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 259 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    441A  PHE*     3.6    18.4    -      -       +      -
    443A  GLN*     3.5    32.0    -      -       -      +
    255C  LYS      3.1    17.5    +      -       -      +
    256C  GLU*     3.8     3.8    -      -       -      +
    258C  VAL*     1.3    72.7    -      -       -      +
    260C  GLY*     1.3    66.2    +      -       -      +
    262C  ARG*     2.2    42.0    +      -       -      +
    263C  ILE*     3.1    34.3    +      -       -      +
    557F  PHE*     5.8     4.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 260 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    256C  GLU      2.9    12.4    +      -       -      -
    259C  ASP*     1.3    76.7    -      -       -      +
    261C  LEU*     1.3    49.7    +      -       -      +
    263C  ILE*     3.2     5.0    +      -       -      +
    264C  THR*     2.6    39.8    +      -       -      -
    576G  ALA*     4.0     6.5    -      -       -      +
    577G  PHE*     3.3    38.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 261 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    206C  ILE*     6.1     0.2    -      -       -      -
    210C  LEU*     4.4    18.2    -      -       +      -
    257C  MET*     2.9    54.2    +      -       +      +
    258C  VAL*     3.3    10.1    +      -       -      +
    260C  GLY*     1.3    72.5    -      -       -      +
    262C  ARG*     1.3    56.8    +      -       -      +
    264C  THR*     3.9     2.1    -      -       -      -
    265C  PHE*     2.8    32.3    +      -       -      +
    456C  LEU*     4.3     8.0    -      -       +      +
    459C  LEU*     3.9    24.2    -      -       +      +
    460C  PHE*     3.6    34.8    -      -       +      -
    463C  LEU*     4.7     5.6    -      -       +      -
    484C  PHE*     4.4     6.5    -      -       +      -
    487C  PHE*     4.6     4.0    -      -       +      -
    577G  PHE*     3.2    11.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 262 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    440A  GLU*     4.0    21.3    +      -       -      +
    441A  PHE*     3.7    21.3    -      -       +      -
    206C  ILE*     5.1     2.5    -      -       +      -
    207C  ILE*     3.8    20.8    -      -       +      +
    210C  LEU*     3.8    21.3    -      -       +      -
    258C  VAL      3.1     5.8    +      -       -      +
    259C  ASP*     2.2    41.1    +      -       -      +
    261C  LEU*     1.3    74.3    -      -       -      +
    263C  ILE*     1.3    80.6    +      -       -      +
    265C  PHE*     4.4     2.2    -      -       -      -
    266C  ASP*     2.9    50.3    +      -       -      +
    448C  SER*     3.1    11.8    +      -       -      +
    449C  TYR*     5.6     2.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 263 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    259C  ASP*     3.1    36.1    +      -       -      +
    260C  GLY*     3.7     8.3    -      -       -      +
    262C  ARG*     1.3    95.1    -      -       -      +
    264C  THR*     1.3    65.2    +      -       -      +
    265C  PHE      3.3     0.2    +      -       -      -
    266C  ASP*     3.3     9.2    +      -       -      +
    267C  TYR*     3.2    20.5    +      -       +      +
    557F  PHE*     6.4     1.8    -      -       +      -
    574G  VAL*     3.8    28.3    -      -       +      -
    575G  VAL      3.8    20.2    -      -       -      +
    576G  ALA*     4.4     6.7    -      -       +      -
    581G  LEU*     4.4     2.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 264 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    260C  GLY      2.6    30.3    +      -       -      -
    261C  LEU*     3.9     4.0    -      -       -      -
    263C  ILE*     1.3    74.5    -      -       -      +
    265C  PHE*     1.3    53.2    +      -       -      +
    267C  TYR*     3.3     2.1    +      -       -      +
    268C  THR*     2.3    46.4    +      -       -      +
    459C  LEU*     4.4    14.6    -      -       +      -
    463C  LEU*     4.8     4.9    -      -       +      -
    466C  ILE*     4.7    13.9    -      -       +      -
    470C  MET*     5.2     0.9    -      -       +      -
    576G  ALA*     3.5     8.5    -      -       -      +
    577G  PHE*     3.3    25.3    -      -       +      -
    581G  LEU*     4.1    24.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 265 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    206C  ILE*     3.3    34.1    -      -       +      -
    261C  LEU      2.8    22.6    +      -       -      +
    262C  ARG*     4.0     4.9    -      -       -      +
    264C  THR*     1.3    70.3    -      -       -      +
    266C  ASP*     1.3    68.2    +      -       -      +
    267C  TYR      3.0     0.2    +      -       -      -
    268C  THR*     4.2     3.1    -      -       -      -
    269C  LEU*     2.9    55.1    +      -       +      +
    273C  LEU*     3.9    14.6    -      -       +      -
    447C  PRO*     3.6    30.7    -      -       +      -
    448C  SER*     3.9    11.9    -      -       -      -
    451C  TYR*     3.7     8.7    -      -       +      -
    455C  HIS*     3.7    26.0    -      -       +      -
    456C  LEU*     4.3    12.6    -      -       +      -
    459C  LEU*     4.1    13.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 266 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    262C  ARG*     2.9    34.2    +      -       -      +
    263C  ILE*     3.3     7.3    +      -       +      +
    265C  PHE*     1.3    77.1    -      -       -      +
    267C  TYR*     1.3    59.6    +      -       -      +
    270C  PRO*     3.8     6.4    -      -       -      +
    446C  PRO*     3.2    16.9    -      -       +      +
    447C  PRO*     3.1    33.3    -      -       +      +
    448C  SER*     2.8    41.1    +      -       -      -
    449C  TYR*     6.0     0.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 267 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    263C  ILE*     3.2     8.9    +      -       +      +
    264C  THR*     3.8     5.2    -      -       +      +
    265C  PHE      3.1     0.6    -      -       -      -
    266C  ASP*     1.3    78.3    -      -       -      +
    268C  THR*     1.3    72.3    +      -       -      +
    269C  LEU      3.6     0.2    -      -       -      -
    270C  PRO*     3.5    11.3    -      -       -      +
    271C  LEU*     3.6    31.6    -      -       +      +
    572E  LEU*     3.6    36.0    -      -       +      +
    574G  VAL*     6.0     0.7    -      -       +      -
    581G  LEU*     3.6    24.7    -      -       +      -
    582G  PRO      3.4    21.1    -      -       -      -
    583G  LYS*     3.2    13.3    -      -       -      +
    584G  LEU*     2.9    36.1    +      -       +      -
    568H  ILE*     5.8     0.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 268 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    264C  THR*     2.3    38.4    +      -       -      +
    265C  PHE      3.9     1.3    -      -       -      -
    267C  TYR*     1.3    83.5    -      -       -      +
    269C  LEU*     1.3    69.2    +      -       -      +
    271C  LEU*     2.8    16.3    +      -       -      -
    272C  VAL*     2.9    47.8    +      -       +      -
    273C  LEU*     3.8    13.2    +      -       +      -
    459C  LEU*     3.9    17.2    -      -       +      +
    466C  ILE*     4.0    12.5    -      -       +      +
    584G  LEU*     4.5     4.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 269 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    265C  PHE*     2.9    48.2    +      -       +      +
    268C  THR*     1.3    78.2    -      -       -      +
    270C  PRO*     1.4    66.0    -      -       +      +
    271C  LEU      3.0     3.5    +      -       -      -
    273C  LEU*     3.2    29.9    +      -       +      +
    274C  LEU*     3.6    17.1    +      -       +      +
    282C  TYR*     3.8    20.0    -      -       +      -
    447C  PRO*     3.9     9.0    -      -       +      -
    451C  TYR*     3.5    37.2    -      -       +      +
    455C  HIS*     4.0    25.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with PRO 270 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    266C  ASP      3.8    11.7    -      -       -      +
    267C  TYR      3.5    15.7    -      -       -      +
    269C  LEU*     1.4    99.9    -      -       +      +
    271C  LEU*     1.3    65.5    +      -       +      +
    274C  LEU*     4.4    17.7    -      -       +      +
    279C  GLN*     5.0     6.2    +      -       -      +
    282C  TYR*     3.3    42.6    -      -       +      +
    447C  PRO*     4.5     1.6    -      -       +      -
    586G  PRO*     5.6     1.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 271 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    267C  TYR*     3.6    46.2    -      -       +      +
    268C  THR*     2.8     7.6    +      -       -      +
    270C  PRO*     1.3    89.6    -      -       +      +
    272C  VAL*     1.3    59.8    +      -       +      +
    273C  LEU      3.9     0.2    -      -       -      -
    274C  LEU*     5.3     1.1    -      -       -      -
    584G  LEU*     3.4    29.8    -      -       +      +
    586G  PRO*     3.4    30.9    -      -       +      +
    587G  GLN      2.7    34.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 272 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    268C  THR*     2.9    41.7    +      -       +      +
    271C  LEU*     1.3    80.0    -      -       +      +
    273C  LEU*     1.3    61.0    +      -       +      +
    462C  LYS*     3.4    42.5    -      -       +      +
    465C  GLU*     4.9     5.4    -      -       -      +
    466C  ILE*     4.9     0.7    -      -       +      -
    584G  LEU*     4.4    15.5    -      -       +      -
    585G  ALA      5.0     4.5    -      -       -      +
    587G  GLN*     3.3    29.8    -      -       +      +
    589G  PHE*     3.6    21.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 273 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    265C  PHE*     3.9    20.9    -      -       +      -
    268C  THR*     3.8    16.4    -      -       +      -
    269C  LEU*     3.2    33.8    +      -       +      +
    272C  VAL*     1.3    78.7    -      -       -      +
    274C  LEU*     1.3    63.3    +      -       -      +
    455C  HIS*     4.2     3.3    -      -       +      +
    458C  ARG*     3.1    36.3    +      -       +      +
    459C  LEU*     3.7    46.7    -      -       +      +
    462C  LYS*     3.8    27.4    -      -       +      -
    589G  PHE*     3.8    11.2    -      -       +      +
----------------------------------------------------------
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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