Contacts of the helix formed by residues 272 - 298 (chain B) in PDB entry 5SY1


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

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

Legend:
Dist - nearest distance (Å) between atoms of two residues
Surf - contact surface area (Å2) between two residues
HB   - hydrophilic-hydrophilic contact (hydrogen bond)
Arom - aromatic-aromatic contact
Phob - hydrophobic-hydrophobic contact
DC   - hydrophobic-hydrophilic contact (destabilizing contact)
+/-  - indicates presence/absence of a specific contacts
*    - indicates residues forming contacts  by their side chain
       (including CA atoms)
Residues in contact with PRO 272 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     80B  PHE      5.5     0.2    -      -       -      +
     83B  HIS*     3.4    25.4    -      -       +      +
     87B  LYS*     5.2     0.2    -      -       -      -
    270B  ARG      4.3     0.7    -      -       -      +
    271B  PHE*     1.3    92.5    -      -       +      +
    273B  LEU*     1.3    64.9    +      -       -      +
    274B  LYS      3.4     0.9    -      -       -      +
    275B  LEU*     4.2    12.1    -      -       +      +
    276B  ALA*     3.1    22.9    +      -       -      +
    371B  LEU*     3.8    26.7    -      -       +      -
    548B  TYR*     3.5    21.5    -      -       +      +
    549B  LEU*     6.0     0.2    -      -       +      -
    552B  GLU*     3.3    31.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 273 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     78B  VAL*     4.3    16.4    -      -       +      -
     79B  ASN      3.5    22.0    -      -       -      +
     80B  PHE*     3.6    37.8    +      -       +      +
     82B  ASP      4.1    12.7    +      -       -      +
     85B  GLN*     5.0     4.9    -      -       +      +
     86B  HIS      6.1     0.7    -      -       -      +
     87B  LYS*     3.7    36.6    -      -       +      +
     90B  ALA*     4.2    12.3    -      -       +      -
    271B  PHE      3.9     0.6    +      -       -      -
    272B  PRO*     1.3    70.6    -      -       -      +
    274B  LYS*     1.3    65.4    +      -       -      +
    276B  ALA*     3.2     3.2    +      -       +      +
    277B  ILE*     3.2    45.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 274 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    493A  SER*     4.3    11.2    +      -       -      -
     80B  PHE*     3.7    43.2    +      -       +      +
     94B  TYR*     5.2     3.8    -      -       +      +
    272B  PRO*     3.4     0.8    -      -       -      +
    273B  LEU*     1.3    80.1    -      -       -      +
    275B  LEU*     1.3    61.2    +      -       -      +
    277B  ILE*     3.9     4.9    +      -       +      -
    278B  SER*     3.7     5.7    +      -       -      -
    399B  TRP*     3.6    46.5    +      -       +      +
    401B  GLY      4.5     5.7    -      -       -      +
    402B  PHE*     4.7     7.8    -      -       +      -
    403B  THR*     3.2    52.1    -      -       +      +
    548B  TYR*     3.8    27.6    -      -       +      +
    552B  GLU*     5.2     2.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 275 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    271B  PHE*     5.0    14.1    -      -       +      -
    272B  PRO*     3.5    24.8    +      -       +      +
    273B  LEU      3.2     0.6    -      -       -      -
    274B  LYS*     1.3    76.8    -      -       -      +
    276B  ALA*     1.3    60.6    +      -       -      +
    278B  SER*     2.6    24.2    +      -       -      +
    279B  VAL*     3.7    11.9    +      -       +      +
    367B  HIS*     3.5    59.0    -      -       +      +
    371B  LEU*     5.1     4.7    -      -       +      -
    402B  PHE*     3.9    22.2    -      -       +      -
    548B  TYR*     3.1    25.9    +      -       +      +
    549B  LEU*     5.4     2.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 276 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     87B  LYS*     3.8    30.3    -      -       +      -
     91B  VAL*     4.4     7.1    -      -       +      +
    271B  PHE*     4.4    17.9    -      -       +      +
    272B  PRO      3.1    19.1    +      -       -      +
    273B  LEU*     3.2     5.1    +      -       +      +
    275B  LEU*     1.3    75.1    -      -       -      +
    277B  ILE*     1.3    64.1    +      -       -      +
    279B  VAL*     3.7    11.9    +      -       -      +
    280B  VAL*     4.0    14.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 277 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    497A  PHE*     6.1     0.2    -      -       +      -
     80B  PHE*     4.2     8.1    -      -       +      -
     90B  ALA*     4.1     7.6    -      -       +      +
     91B  VAL*     3.9    26.0    -      -       +      +
     94B  TYR*     3.7    44.2    -      -       +      -
    273B  LEU*     3.2    36.8    +      -       +      +
    274B  LYS*     4.1    10.3    -      -       +      +
    276B  ALA*     1.3    78.1    -      -       -      +
    278B  SER*     1.3    57.6    +      -       -      +
    279B  VAL      3.1     0.9    +      -       -      -
    280B  VAL*     3.1     4.7    +      -       -      +
    281B  VAL*     3.0    44.1    +      -       +      +
    403B  THR*     4.1    13.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 278 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    274B  LYS      3.7    10.4    +      -       -      -
    275B  LEU*     2.6    35.8    +      -       -      +
    277B  ILE*     1.3    77.7    -      -       -      +
    279B  VAL*     1.3    64.0    +      -       -      +
    281B  VAL*     4.7     4.7    -      -       -      +
    282B  ALA*     3.3    22.4    +      -       -      +
    367B  HIS*     5.9     0.3    -      -       -      -
    402B  PHE*     4.2     6.0    -      -       -      -
    403B  THR*     3.9    18.6    -      -       -      +
    406B  GLN*     3.4    29.4    -      -       -      +
    407B  ALA      5.4     0.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 279 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    271B  PHE*     6.0     4.7    -      -       +      -
    275B  LEU*     3.7    18.1    +      -       +      +
    276B  ALA*     4.2     8.7    -      -       -      +
    277B  ILE      3.1     1.4    +      -       -      -
    278B  SER*     1.3    80.2    -      -       -      +
    280B  VAL*     1.3    64.3    +      -       +      +
    282B  ALA*     3.4     6.6    +      -       -      +
    283B  PHE*     2.9    26.5    +      -       +      +
    360B  LEU*     4.6    23.5    -      -       +      +
    363B  SER      6.2     0.7    -      -       -      -
    364B  MET*     3.7    37.2    -      -       +      -
    367B  HIS*     5.6     8.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 280 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91B  VAL*     3.8    36.3    -      -       +      +
     95B  GLY*     5.9     0.2    -      -       -      -
    276B  ALA      4.0    10.1    +      -       -      +
    277B  ILE      3.1     4.5    +      -       -      +
    279B  VAL*     1.3    79.5    -      -       +      +
    281B  VAL*     1.3    60.8    +      -       +      +
    283B  PHE*     2.8    27.3    +      -       +      +
    284B  ILE*     2.8    29.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 281 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    497A  PHE*     4.7    12.3    -      -       +      -
     91B  VAL*     5.2     2.2    -      -       +      +
     94B  TYR*     4.0    23.6    -      -       +      +
     95B  GLY*     4.4     4.9    -      -       -      +
     98B  PHE*     4.2    26.0    -      -       +      -
    277B  ILE*     3.0    35.9    +      -       +      +
    278B  SER*     4.7     4.5    -      -       -      -
    280B  VAL*     1.3    76.2    -      -       +      +
    282B  ALA*     1.3    61.4    +      -       -      +
    284B  ILE*     3.6     9.0    +      -       -      +
    285B  ALA*     3.1    21.8    +      -       -      +
    403B  THR*     5.0     5.2    -      -       -      +
    407B  ALA*     3.9    19.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 282 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    278B  SER      3.3    21.0    +      -       -      +
    279B  VAL*     3.5     6.3    -      -       -      +
    280B  VAL      3.2     0.4    -      -       -      -
    281B  VAL*     1.3    78.0    -      -       -      +
    283B  PHE*     1.3    56.3    +      -       -      +
    285B  ALA*     3.1     5.2    +      -       -      +
    286B  LEU*     2.9    25.1    +      -       -      +
    360B  LEU*     3.7    12.6    -      -       +      -
    406B  GLN*     4.2    17.5    -      -       +      +
    407B  ALA*     4.5     6.1    -      -       -      +
    410B  LEU*     3.3    28.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 283 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    279B  VAL*     2.9    15.3    +      -       +      +
    280B  VAL*     2.8    17.0    +      -       +      +
    282B  ALA*     1.3    76.1    -      -       -      +
    284B  ILE*     1.3    67.7    +      -       +      +
    286B  LEU*     3.6    19.2    +      -       +      +
    287B  TYR*     3.3    26.2    +      +       +      +
    357B  LEU*     4.5    19.7    -      -       +      -
    360B  LEU*     4.8     7.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 284 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     95B  GLY*     3.7    33.2    -      -       -      +
     98B  PHE*     3.9    16.4    -      -       +      -
     99B  CYS*     3.9    22.9    -      -       -      -
    188B  PRO*     4.4    22.7    -      -       +      -
    192B  CYS*     5.4     6.7    -      -       +      -
    280B  VAL*     2.8    28.7    +      -       +      +
    281B  VAL*     4.0     5.2    -      -       -      +
    282B  ALA      3.3     0.2    -      -       -      -
    283B  PHE*     1.3    83.1    -      -       +      +
    285B  ALA*     1.3    58.9    +      -       -      +
    287B  TYR*     2.9    21.9    +      -       -      +
    288B  GLN*     3.0    18.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 285 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98B  PHE*     3.6    31.0    -      -       +      -
    281B  VAL      3.1    14.7    +      -       -      +
    282B  ALA*     3.1    12.2    +      -       -      +
    284B  ILE*     1.3    76.6    -      -       -      +
    286B  LEU*     1.3    62.4    +      -       -      +
    288B  GLN*     3.3     3.0    +      -       -      +
    289B  MET*     3.2    29.6    +      -       -      +
    407B  ALA*     4.2     8.5    -      -       +      +
    410B  LEU*     4.9     6.1    -      -       +      -
    411B  CYS*     3.9    15.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 286 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    282B  ALA      2.9    15.4    +      -       -      +
    283B  PHE*     3.7    25.4    -      -       +      +
    285B  ALA*     1.3    78.0    -      -       -      +
    287B  TYR*     1.3    60.2    +      -       -      +
    289B  MET*     3.7     0.9    +      -       -      +
    290B  ALA*     3.2    23.7    +      -       -      +
    353B  CYS*     4.0    34.3    -      -       -      +
    356B  ASN*     4.3    13.2    -      -       +      +
    357B  LEU*     4.3    21.8    -      -       +      +
    360B  LEU*     5.3     5.8    -      -       +      -
    410B  LEU*     4.3    10.5    -      -       +      +
    414B  MET*     3.7    35.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 287 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    184B  PHE*     3.7    16.0    +      -       -      +
    187B  LEU*     3.4    28.1    -      -       +      +
    188B  PRO*     3.6    30.7    -      -       +      -
    283B  PHE*     3.3    18.1    +      +       +      +
    284B  ILE*     2.9    12.0    +      -       -      +
    286B  LEU*     1.3    80.0    -      -       -      +
    288B  GLN*     1.3    84.3    +      -       -      +
    290B  ALA*     3.8     5.2    +      -       +      +
    291B  LEU*     3.4    29.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 288 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98B  PHE*     4.8     0.7    -      -       +      -
     99B  CYS*     4.9     6.2    -      -       -      -
    102B  VAL*     3.4    45.4    -      -       +      +
    181B  TYR*     5.0     5.2    +      -       -      -
    185B  GLY*     3.9    22.6    +      -       -      +
    188B  PRO*     3.8    14.1    -      -       -      +
    284B  ILE*     3.0    22.9    +      -       +      +
    285B  ALA*     3.3     7.4    +      -       -      +
    286B  LEU      3.2     0.2    -      -       -      -
    287B  TYR*     1.3   107.3    -      -       -      +
    289B  MET*     1.3    63.9    +      -       +      +
    291B  LEU*     3.9     7.2    -      -       -      +
    292B  LEU*     3.1    27.4    +      -       -      +
    411B  CYS*     6.4     0.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with MET 289 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    285B  ALA      3.2    16.8    +      -       -      +
    286B  LEU      4.4     0.2    -      -       -      +
    288B  GLN*     1.3    79.1    -      -       +      +
    290B  ALA*     1.3    59.5    +      -       -      +
    292B  LEU*     3.9    18.3    -      -       +      +
    293B  LEU*     3.0    48.4    +      -       +      +
    411B  CYS*     3.6    50.3    -      -       +      +
    414B  MET*     4.0    21.1    -      -       +      -
    415B  ALA*     4.7    14.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 290 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    286B  LEU      3.2    18.9    +      -       -      +
    287B  TYR*     4.2     6.5    -      -       +      +
    288B  GLN      3.3     0.2    -      -       -      -
    289B  MET*     1.3    77.3    -      -       -      +
    291B  LEU*     1.3    57.1    +      -       -      +
    293B  LEU      4.2     0.4    -      -       -      -
    294B  ILE*     3.3    29.8    +      -       -      +
    349B  VAL*     4.5    18.2    -      -       +      +
    353B  CYS*     4.5    18.6    -      -       +      -
    414B  MET*     4.9     6.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 291 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    181B  TYR*     3.7    26.5    -      -       +      +
    184B  PHE*     3.6    46.0    -      -       +      +
    185B  GLY*     3.8     6.1    -      -       -      -
    287B  TYR*     3.4    28.0    +      -       +      +
    288B  GLN*     3.9    10.3    -      -       -      +
    289B  MET      3.2     0.4    -      -       -      -
    290B  ALA*     1.3    78.4    -      -       -      +
    292B  LEU*     1.3    55.4    +      -       -      +
    293B  LEU      3.3     0.4    -      -       -      -
    294B  ILE*     4.9     3.6    -      -       +      -
    295B  SER*     2.4    49.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 292 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    102B  VAL*     6.4     2.2    -      -       +      -
    106B  LEU*     4.2    27.4    -      -       +      -
    177B  ILE*     5.6     7.4    -      -       +      -
    181B  TYR*     4.0    22.2    -      -       +      +
    288B  GLN      3.1    18.8    +      -       -      +
    289B  MET*     3.3    21.9    +      -       +      +
    291B  LEU*     1.3    76.9    -      -       -      +
    293B  LEU*     1.3    66.5    +      -       +      +
    295B  SER*     4.1     5.2    -      -       -      +
    296B  GLY*     3.4    19.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 293 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    289B  MET*     3.0    34.7    +      -       +      +
    290B  ALA      4.6     2.2    -      -       -      +
    292B  LEU*     1.3    81.5    -      -       +      +
    294B  ILE*     1.3    65.6    +      -       -      +
    296B  GLY      3.6     0.7    +      -       -      -
    297B  VAL*     3.4    16.2    -      -       +      +
    345B  TYR*     3.3    30.9    +      -       -      +
    349B  VAL*     4.4    16.6    -      -       +      -
    414B  MET*     4.0    17.3    -      -       +      +
    415B  ALA*     5.4     5.8    -      -       +      -
    418B  THR*     3.9    32.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 294 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    290B  ALA      3.3    20.5    +      -       -      +
    291B  LEU*     3.6     5.9    +      -       +      +
    293B  LEU*     1.3    79.4    -      -       -      +
    295B  SER*     1.3    59.4    +      -       -      +
    296B  GLY      3.1     5.1    +      -       -      -
    298B  LEU*     3.5    43.1    +      -       +      +
    299B  PRO*     4.2     0.2    -      -       -      +
    345B  TYR*     4.9     6.7    -      -       +      -
    346B  VAL*     4.8    23.6    -      -       +      +
    349B  VAL*     4.2    29.8    -      -       +      -
    350B  THR*     6.3     1.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 295 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    177B  ILE*     3.3    22.0    -      -       -      +
    178B  TYR*     4.5    22.8    -      -       -      +
    181B  TYR*     3.5    28.4    -      -       -      -
    291B  LEU*     2.4    32.2    +      -       -      +
    292B  LEU*     3.9     4.8    -      -       -      +
    294B  ILE*     1.3    77.3    -      -       -      +
    296B  GLY*     1.3    54.6    +      -       -      +
    299B  PRO*     4.3    13.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 296 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    177B  ILE*     5.2     3.1    -      -       -      -
    292B  LEU*     3.4    16.1    +      -       -      -
    293B  LEU      4.3     0.4    -      -       -      -
    294B  ILE      3.2     1.2    -      -       -      -
    295B  SER*     1.3    78.9    -      -       -      +
    297B  VAL*     1.3    67.3    +      -       -      +
    299B  PRO*     4.1     8.3    -      -       -      +
    300B  THR*     4.3    11.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 297 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    292B  LEU      5.6     0.2    -      -       -      +
    293B  LEU*     3.4    12.3    -      -       +      +
    294B  ILE      3.6     0.6    +      -       -      -
    296B  GLY*     1.3    83.2    -      -       -      +
    298B  LEU*     1.3    66.1    +      -       -      +
    299B  PRO*     3.3     1.5    -      -       -      +
    300B  THR*     3.0    24.7    +      -       -      +
    301B  LEU*     3.2    26.9    +      -       +      +
    345B  TYR*     3.3    45.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 298 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    178B  TYR*     6.4     0.4    -      -       +      -
    294B  ILE*     3.5    33.1    +      -       +      +
    297B  VAL*     1.3    79.8    -      -       +      +
    299B  PRO*     1.3    65.3    -      -       +      +
    301B  LEU*     3.8    16.2    -      -       +      -
    302B  HIS*     3.0    42.3    +      -       +      +
    342B  GLU*     3.8    37.9    -      -       +      +
    345B  TYR*     5.3     6.3    -      -       +      -
    346B  VAL*     4.6    19.1    -      -       +      -
----------------------------------------------------------
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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