Contacts of the helix formed by residues 323 - 347 (chain B) in PDB entry 4TVJ


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 THR 323 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    289B  ILE*     4.5     7.5    -      -       -      +
    322B  ARG*     1.3    81.1    +      -       -      +
    324B  GLN*     1.3    63.7    +      -       -      +
    325B  LYS*     2.6    54.0    +      -       +      +
    326B  GLU*     3.1    20.0    +      -       +      +
    327B  LEU*     2.9    29.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 324 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    289B  ILE*     5.7     1.2    -      -       -      +
    323B  THR*     1.3    79.3    +      -       -      +
    325B  LYS*     1.3    64.8    +      -       -      +
    327B  LEU*     3.3    10.5    +      -       -      +
    328B  SER*     2.8    32.1    +      -       -      -
    453B  THR*     2.8    35.6    +      -       -      +
    454B  GLY*     3.8    17.0    +      -       -      -
    456B  MET*     5.1    10.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 325 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    323B  THR*     2.6    42.2    +      -       +      +
    324B  GLN*     1.3    89.9    +      -       -      +
    326B  GLU*     1.3    72.2    +      -       -      +
    328B  SER*     3.3     6.6    +      -       -      -
    329B  GLU*     2.9    44.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 326 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    320B  LEU      3.6    10.5    -      -       -      +
    321B  ILE*     3.8    14.7    -      -       +      +
    322B  ARG*     3.0    34.8    +      -       -      +
    323B  THR*     3.1    29.0    +      -       +      +
    325B  LYS*     1.3    88.4    +      -       -      +
    327B  LEU*     1.3    66.0    +      -       -      +
    329B  GLU*     3.4    16.6    +      -       -      +
    330B  LYS*     3.3    26.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 327 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    282B  LEU*     3.8    32.7    -      -       +      +
    285B  ILE*     3.9    22.2    -      -       +      -
    286B  GLU*     4.0    19.3    -      -       +      +
    289B  ILE*     4.3     9.9    -      -       +      -
    321B  ILE*     3.7     9.7    -      -       +      +
    323B  THR      2.9    11.0    +      -       -      +
    324B  GLN*     3.5    11.0    -      -       -      +
    326B  GLU*     1.3    76.7    -      -       -      +
    328B  SER*     1.3    57.3    +      -       -      +
    330B  LYS*     3.1     6.8    +      -       -      +
    331B  ILE*     2.9    32.8    +      -       +      +
    451B  PRO*     4.2    13.0    -      -       +      -
    453B  THR*     3.2    27.6    -      -       -      +
    454B  GLY      5.0     2.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 328 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    324B  GLN*     2.8    34.5    +      -       -      -
    325B  LYS*     3.4    11.2    -      -       -      -
    327B  LEU*     1.3    74.2    -      -       -      +
    329B  GLU*     1.3    51.4    +      -       -      +
    331B  ILE*     3.1    14.8    +      -       -      +
    332B  GLN*     2.8    46.9    +      -       -      +
    454B  GLY*     4.3    10.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 329 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    258B  MET*     4.5     4.3    -      -       +      +
    325B  LYS*     2.9    32.2    +      -       -      +
    326B  GLU*     3.7    20.9    -      -       -      +
    327B  LEU      3.3     0.2    -      -       -      -
    328B  SER*     1.3    74.7    -      -       -      +
    330B  LYS*     1.3    67.4    +      -       -      +
    332B  GLN*     3.4    19.6    +      -       -      +
    333B  LEU*     3.0    26.0    +      -       -      +
    431B  ARG*     6.0     0.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 330 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    258B  MET      4.3     6.9    +      -       -      -
    259B  LYS*     5.3     2.0    -      -       -      +
    282B  LEU*     3.5    24.2    -      -       +      -
    305B  PHE*     3.5    25.2    -      -       +      -
    306B  TYR*     5.1     1.7    +      -       +      -
    311B  HIS*     2.9    30.4    +      -       -      +
    313B  PHE*     5.1     4.2    -      -       -      -
    321B  ILE*     3.9    26.2    -      -       +      -
    326B  GLU      3.3    15.0    +      -       -      +
    327B  LEU      3.1     7.9    +      -       -      +
    329B  GLU*     1.3    86.6    -      -       -      +
    331B  ILE*     1.3    59.3    +      -       -      +
    333B  LEU*     3.3    13.9    +      -       +      +
    334B  LEU*     2.9    31.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 331 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    279B  TYR*     4.6     5.8    -      -       +      -
    282B  LEU*     4.0    15.3    -      -       +      -
    327B  LEU*     2.9    21.5    +      -       +      +
    328B  SER*     3.1     7.2    +      -       -      +
    330B  LYS*     1.3    73.3    -      -       -      +
    332B  GLN*     1.3    66.1    +      -       +      +
    334B  LEU*     3.1     6.0    +      -       -      +
    335B  GLU*     2.9    36.7    +      -       +      +
    450B  ALA*     4.7     2.7    -      -       +      -
    451B  PRO*     3.7    33.9    -      -       +      +
    454B  GLY*     3.4    33.4    -      -       -      +
    455B  TYR*     3.1    31.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 332 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    258B  MET*     4.2     9.2    -      -       +      +
    328B  SER*     2.8    29.9    +      -       -      +
    329B  GLU*     3.5    20.9    -      -       -      +
    330B  LYS      3.3     0.2    -      -       -      -
    331B  ILE*     1.3    72.8    -      -       +      +
    333B  LEU*     1.3    56.6    +      -       -      +
    335B  GLU*     3.4    11.6    +      -       -      +
    336B  ALA*     3.0    29.6    +      -       -      +
    431B  ARG*     3.4    27.4    +      -       -      +
    434B  ASN*     5.5     1.2    +      -       -      -
    473B  TYR*     4.2    21.0    -      -       -      -
    475B  PHE*     3.9    20.7    -      -       -      -
    601B  09L      5.3     4.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 333 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    255B  MET*     3.9    24.7    -      -       -      -
    258B  MET*     3.8    32.0    -      -       +      +
    260B  TYR*     4.1    14.8    -      -       +      -
    305B  PHE*     5.1     0.9    -      -       +      -
    309B  ILE*     4.7     5.6    -      -       +      -
    311B  HIS*     3.4    37.7    -      -       +      +
    329B  GLU      3.0    13.8    +      -       -      +
    330B  LYS*     3.5    20.6    -      -       +      +
    331B  ILE      3.2     0.2    -      -       -      -
    332B  GLN*     1.3    75.4    -      -       -      +
    334B  LEU*     1.3    59.5    +      -       +      +
    336B  ALA*     3.3     1.9    +      -       -      -
    337B  LEU*     2.9    46.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 334 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    275B  ILE*     3.8    19.7    -      -       +      +
    278B  GLY      3.5     6.5    -      -       -      -
    279B  TYR*     3.3    60.2    +      -       +      +
    282B  LEU*     3.8    12.8    -      -       +      -
    305B  PHE*     4.2     6.5    -      -       +      -
    309B  ILE*     3.5    36.3    -      -       +      -
    330B  LYS      2.9    17.0    +      -       -      +
    331B  ILE      3.1     3.6    +      -       -      +
    333B  LEU*     1.3    78.5    -      -       +      +
    335B  GLU*     1.3    56.7    +      -       -      +
    337B  LEU*     3.3    16.0    +      -       +      +
    338B  GLY*     2.9    25.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 335 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    279B  TYR*     3.3    18.4    +      -       -      +
    331B  ILE*     2.9    32.9    +      -       +      +
    332B  GLN*     3.9    11.6    -      -       -      +
    334B  LEU*     1.3    70.3    -      -       -      +
    336B  ALA*     1.3    63.4    +      -       -      +
    338B  GLY*     3.2     3.9    +      -       -      +
    339B  ASP*     3.0    27.0    +      -       -      +
    434B  ASN*     4.8     5.8    -      -       -      +
    446B  ALA*     3.8    12.0    -      -       -      +
    447B  HIS      5.1     0.5    +      -       -      -
    455B  TYR*     2.8    25.6    +      -       -      -
    601B  09L      3.5    48.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 336 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    255B  MET*     3.7    26.2    -      -       +      -
    258B  MET*     4.6     5.6    -      -       -      -
    332B  GLN      3.0    18.4    +      -       -      +
    333B  LEU      3.8     3.1    -      -       -      +
    334B  LEU      3.3     0.2    -      -       -      -
    335B  GLU*     1.3    74.7    -      -       -      +
    337B  LEU*     1.3    65.4    +      -       -      +
    339B  ASP*     3.1     3.6    +      -       -      +
    340B  ILE*     2.9    28.9    +      -       -      +
    431B  ARG*     4.7     3.6    -      -       -      -
    433B  SER*     3.9     4.3    -      -       -      +
    434B  ASN*     3.4    26.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 337 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    255B  MET*     3.9    14.1    -      -       +      -
    260B  TYR*     3.9    27.1    -      -       +      -
    267B  LEU*     3.8    24.0    -      -       +      -
    270B  LEU*     3.5    31.5    -      -       +      +
    275B  ILE*     3.7     8.0    -      -       +      +
    309B  ILE*     4.2     4.3    -      -       +      -
    333B  LEU*     2.9    35.8    +      -       +      +
    334B  LEU*     3.6    26.5    -      -       +      +
    336B  ALA*     1.3    76.1    -      -       -      +
    338B  GLY*     1.3    56.0    +      -       -      +
    340B  ILE*     3.3     5.6    +      -       +      +
    341B  GLU*     2.9    30.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 338 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    272B  VAL*     6.5     0.4    -      -       -      -
    275B  ILE*     3.6    16.5    -      -       -      +
    334B  LEU      2.9    13.4    +      -       -      -
    335B  GLU*     3.2     5.6    +      -       -      -
    336B  ALA      3.2     0.2    -      -       -      -
    337B  LEU*     1.3    76.3    -      -       -      +
    339B  ASP*     1.3    63.7    +      -       -      +
    341B  GLU*     3.3     6.9    +      -       -      +
    342B  ILE*     3.2    27.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 339 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    335B  GLU      3.0    12.9    +      -       -      +
    336B  ALA      3.1     6.0    +      -       -      +
    338B  GLY*     1.3    74.8    -      -       -      +
    340B  ILE*     1.3    60.9    +      -       -      +
    342B  ILE*     3.4    10.6    +      -       -      +
    343B  ALA*     2.9    27.9    +      -       -      +
    433B  SER      4.2     2.2    -      -       -      +
    434B  ASN*     3.4    49.3    +      -       -      +
    437B  GLY*     4.0     8.1    +      -       -      -
    438B  ILE*     4.3     3.8    -      -       -      +
    444B  ARG*     3.2    38.5    +      -       -      -
    601B  09L      4.9     7.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 340 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    248B  VAL*     6.3     0.2    -      -       +      -
    251B  MET*     3.9    32.1    -      -       +      -
    255B  MET*     3.3    47.8    -      -       +      -
    267B  LEU*     4.1    20.9    -      -       +      +
    336B  ALA      2.9    18.1    +      -       -      +
    337B  LEU*     3.7     6.3    -      -       +      +
    339B  ASP*     1.3    74.5    -      -       -      +
    341B  GLU*     1.3    68.6    +      -       -      +
    343B  ALA*     3.7     5.6    -      -       -      +
    344B  ILE*     2.9    47.0    +      -       +      +
    433B  SER*     4.0    13.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 341 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    267B  LEU      5.3     4.3    -      -       -      -
    270B  LEU*     3.7    27.6    -      -       +      +
    271B  THR*     4.7     1.1    -      -       -      -
    272B  VAL*     3.8    32.7    +      -       +      +
    275B  ILE*     4.5     7.9    -      -       +      -
    337B  LEU      2.9    13.4    +      -       -      +
    338B  GLY*     3.3     9.5    +      -       -      +
    340B  ILE*     1.3    79.4    -      -       -      +
    342B  ILE*     1.3    77.0    +      -       -      +
    344B  ILE*     3.7     6.1    +      -       -      +
    345B  LYS*     2.5    57.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 342 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    338B  GLY      3.2    15.1    +      -       -      +
    339B  ASP*     3.4    13.9    -      -       -      +
    341B  GLU*     1.3    85.7    -      -       -      +
    343B  ALA*     1.3    68.4    +      -       -      +
    345B  LYS*     3.3     8.1    +      -       -      +
    346B  LEU*     2.9    23.7    +      -       +      +
    436B  VAL*     4.7     2.2    -      -       +      -
    437B  GLY*     4.2     8.3    -      -       -      +
    440B  SER*     3.7    14.6    -      -       -      +
    441B  HIS*     3.5    43.7    -      -       +      +
    444B  ARG*     3.8    24.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 343 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    248B  VAL*     5.7     0.7    -      -       +      -
    251B  MET*     3.3    35.9    -      -       +      -
    339B  ASP      2.9    19.3    +      -       -      +
    340B  ILE      3.1     4.4    +      -       -      +
    342B  ILE*     1.3    74.1    -      -       -      +
    344B  ILE*     1.3    63.0    +      -       -      +
    346B  LEU*     3.1     1.3    +      -       -      -
    347B  VAL*     2.9    32.4    +      -       +      +
    433B  SER      5.2     0.4    -      -       -      +
    436B  VAL*     3.8    26.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 344 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    248B  VAL*     4.5    26.7    -      -       +      -
    251B  MET*     5.2     1.1    -      -       -      -
    267B  LEU*     3.6    45.5    -      -       +      +
    268B  GLY*     3.7    15.0    -      -       -      +
    340B  ILE*     2.9    30.1    +      -       +      +
    341B  GLU*     4.2     4.5    -      -       -      +
    343B  ALA*     1.3    76.7    -      -       +      +
    345B  LYS*     1.3    63.0    +      -       +      +
    347B  VAL*     3.7    10.2    +      -       +      +
    348B  LYS*     3.5    18.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 345 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    268B  GLY      6.0     0.4    +      -       -      -
    270B  LEU      5.0     4.2    +      -       -      -
    271B  THR*     6.1     0.6    -      -       -      +
    341B  GLU*     2.5    43.8    +      -       -      +
    342B  ILE*     3.3     9.5    +      -       -      +
    343B  ALA      3.2     0.4    -      -       -      -
    344B  ILE*     1.3    79.2    -      -       +      +
    346B  LEU*     1.3    64.8    +      -       -      +
    348B  LYS*     3.4    18.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 346 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    246B  CYS*     4.8     2.2    -      -       -      -
    342B  ILE*     2.9    19.5    +      -       +      +
    343B  ALA*     3.6     7.0    -      -       -      +
    345B  LYS*     1.3    78.1    -      -       -      +
    347B  VAL*     1.3    69.0    +      -       +      +
    348B  LYS      3.3     3.2    +      -       -      +
    361B  HIS*     3.8    31.0    +      -       +      +
    364B  ASN*     3.2    59.8    +      -       +      +
    365B  LEU*     4.0     5.8    -      -       +      -
    436B  VAL*     3.9    16.2    -      -       +      -
    440B  SER*     3.8    24.2    -      -       -      +
    441B  HIS*     6.0     0.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 347 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    246B  CYS*     3.7    42.2    -      -       +      +
    248B  VAL*     4.2    21.1    -      -       +      -
    343B  ALA*     2.9    25.8    +      -       +      +
    344B  ILE*     3.8     8.1    -      -       +      +
    345B  LYS      3.3     0.2    -      -       -      -
    346B  LEU*     1.3    79.3    -      -       +      +
    348B  LYS*     1.3    67.6    +      -       -      +
    349B  THR*     3.5     6.1    +      -       -      +
    361B  HIS*     3.4    30.2    -      -       +      +
    436B  VAL*     5.6     0.4    -      -       +      -
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


   I  Hydrophilic      - N and O that can donate and accept hydrogen bonds
                         (e.g., oxygen of hydroxyl group of Ser. or Thr)
  II  Acceptor         - N or O that can only accept a hydrogen bond
 III  Donor            - N that can only donate a hydrogen bond
  IV  Hydrophobic      - Cl, Br, I and all C atoms that are not in
                         aromatic rings and do not have a covalent bond to
                         a N or O atom
   V  Aromatic         - C in aromatic rings irrespective of any other 
                         bonds formed by the atom
  VI  Neutral          - C atoms that have a covalent bond to at least one
                         atom of class I or two or more atoms from class II
                         or III; atoms; S, F, P, and metal atoms in all cases
 VII  Neutral-donor    - C atoms that have a covalent bond with only one
                         atom of class III
VIII  Neutral-acceptor - C atoms that have a covalent bond with only 
                         one atom of class II
For each pair of contacts the state of legitimacy is shown below:

Legend:
+, legitimate
-, illegitimate
------------------------------------------------------------
  Atomic class           I  II  III   IV   V   VI  VII  VIII
------------------------------------------------------------
   I  (Hydrophilic)      +   +    +    -   +   +    +    +
  II  (Acceptor)         +   -    +    -   +   +    +    -
 III  (Donor)            +   +    -    -   +   +    -    +
  IV  (Hydrophobic)      -   -    -    +   +   +    +    +
   V  (Aromatic)         +   +    +    +   +   +    +    +
  VI  (Neutral)          +   +    +    +   +   +    +    +
 VII  (Neutral-donor)    +   +    -    +   +   +    -    +
VIII  (Neutral-acceptor) +   -    +    +   +   +    +    -
------------------------------------------------------------
Warning!
Atom classes for heterogroups are automatically assigned based on the atomic coordinates. However, in three cases (see below) the automatic assignment is currently ambiguous. In these cases, the user is advised to manually analyse the full list of contacts using LPC software.
1. Carbon atoms belonging to a 4-, 5- or 6-member ring are 
   considered "aromatic" (Class V) if the ring is approximately
   planar, and "hydrophobic" (Class IV) or "neutral" (Classes
   VI, VII, VIII) if the ring is non-planar.
2. The oxygen atom of a carbonyl or hydroxy group is considered
   "hydroxy" (Class I) if the CO bond is longer than 1.29 Å, and
   "carbonyl" (Class II) if shorter.
3. All nitrogen atoms are considered "hydrophilic" (Class I).

Please E-mail any questions and/or suggestions concerning this page to Vladimir.Sobolev@weizmann.ac.il