Contacts of the helix formed by residues 272 - 298 (chain A) 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 A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     80A  PHE      5.4     0.2    -      -       -      +
     83A  HIS*     3.4    24.0    -      -       +      +
     87A  LYS*     5.2     0.4    -      -       -      -
    270A  ARG      4.3     0.4    -      -       -      +
    271A  PHE*     1.3    91.8    -      -       +      +
    273A  LEU*     1.3    65.7    +      -       -      +
    274A  LYS      4.3     1.3    -      -       -      +
    275A  LEU*     3.5    13.0    +      -       +      +
    276A  ALA*     3.1    22.7    +      -       -      +
    371A  LEU*     3.8    26.0    -      -       +      -
    548A  TYR*     3.5    20.9    -      -       +      +
    549A  LEU*     6.0     0.2    -      -       +      -
    552A  GLU*     3.3    32.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 273 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     78A  VAL*     4.3    16.6    -      -       +      -
     79A  ASN      3.5    22.2    -      -       -      +
     80A  PHE*     3.6    38.0    +      -       +      +
     82A  ASP      4.1    11.7    +      -       -      +
     85A  GLN*     5.0     5.8    -      -       +      +
     86A  HIS      6.1     0.2    -      -       -      +
     87A  LYS*     3.7    36.1    -      -       +      +
     90A  ALA*     4.2    12.6    -      -       +      -
     91A  VAL*     5.2     0.4    -      -       +      -
    271A  PHE      3.9     0.6    +      -       -      -
    272A  PRO*     1.3    72.5    -      -       -      +
    274A  LYS*     1.3    66.9    +      -       -      +
    276A  ALA*     3.2     3.7    +      -       +      +
    277A  ILE*     3.2    45.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 274 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     80A  PHE*     3.7    44.4    +      -       +      +
     94A  TYR*     5.2     4.0    -      -       +      +
    272A  PRO*     3.4     1.6    -      -       -      +
    273A  LEU*     1.3    80.2    -      -       -      +
    275A  LEU*     1.3    61.1    +      -       -      +
    277A  ILE*     3.9     4.4    +      -       +      -
    278A  SER*     3.7     5.0    +      -       -      -
    399A  TRP*     3.6    45.4    +      -       +      +
    401A  GLY      4.5     4.0    -      -       -      +
    402A  PHE*     4.7     9.5    -      -       +      +
    403A  THR*     3.2    52.1    -      -       +      +
    548A  TYR*     3.8    27.8    -      -       +      +
    552A  GLU*     5.2     1.8    -      -       -      +
    493B  SER*     4.2    14.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 275 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    271A  PHE*     5.0    13.0    -      -       +      -
    272A  PRO*     3.5    25.0    +      -       +      +
    273A  LEU      3.2     0.6    -      -       -      -
    274A  LYS*     1.3    77.5    -      -       -      +
    276A  ALA*     1.3    62.2    +      -       -      +
    278A  SER*     2.6    22.7    +      -       -      +
    279A  VAL*     3.7    12.0    +      -       +      +
    367A  HIS*     3.5    58.3    -      -       +      +
    371A  LEU*     5.1     4.9    -      -       +      -
    402A  PHE*     3.9    21.5    -      -       +      -
    548A  TYR*     3.1    27.0    +      -       +      +
    549A  LEU*     5.4     2.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 276 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     87A  LYS*     3.8    30.1    -      -       +      -
     91A  VAL*     4.4     6.7    -      -       +      +
    271A  PHE*     4.4    17.5    -      -       +      +
    272A  PRO      3.1    18.2    +      -       -      +
    273A  LEU*     3.2     4.5    +      -       +      +
    275A  LEU*     1.3    74.3    -      -       -      +
    277A  ILE*     1.3    66.1    +      -       -      +
    279A  VAL*     3.7    11.1    +      -       -      +
    280A  VAL*     4.0    15.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 277 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     80A  PHE*     4.2     8.3    -      -       +      -
     90A  ALA*     4.1     7.4    -      -       +      +
     91A  VAL*     3.9    25.1    -      -       +      +
     94A  TYR*     3.7    44.0    -      -       +      -
    273A  LEU*     3.2    34.9    +      -       +      +
    274A  LYS*     4.1    10.5    -      -       +      +
    275A  LEU      3.3     0.2    -      -       -      -
    276A  ALA*     1.3    77.2    -      -       -      +
    278A  SER*     1.3    58.2    +      -       -      +
    279A  VAL      3.1     1.0    +      -       -      -
    280A  VAL*     3.1     4.2    +      -       -      +
    281A  VAL*     3.0    43.4    +      -       +      +
    403A  THR*     4.1    12.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 278 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    274A  LYS      3.7    10.4    +      -       -      -
    275A  LEU*     2.6    35.3    +      -       -      +
    277A  ILE*     1.3    78.8    -      -       -      +
    279A  VAL*     1.3    62.0    +      -       -      +
    281A  VAL*     4.7     4.5    -      -       -      -
    282A  ALA*     3.3    22.4    +      -       -      +
    367A  HIS*     5.9     0.3    -      -       -      -
    402A  PHE*     4.2     6.8    -      -       -      -
    403A  THR*     3.9    18.2    -      -       -      +
    406A  GLN*     3.4    30.9    -      -       -      +
    407A  ALA*     5.8     0.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 279 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    271A  PHE*     6.0     4.3    -      -       +      -
    275A  LEU*     3.7    18.1    +      -       +      +
    276A  ALA*     4.2     8.1    -      -       -      +
    277A  ILE      3.2     1.0    -      -       -      -
    278A  SER*     1.3    80.3    -      -       -      +
    280A  VAL*     1.3    63.6    +      -       +      +
    282A  ALA*     3.4     6.5    +      -       -      +
    283A  PHE*     2.9    25.7    +      -       +      +
    360A  LEU*     4.6    22.2    -      -       +      +
    363A  SER      6.0     0.7    -      -       -      +
    364A  MET*     3.7    37.5    -      -       +      -
    367A  HIS*     5.6     9.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 280 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91A  VAL*     3.8    35.7    -      -       +      +
     95A  GLY*     5.9     0.2    -      -       -      -
    276A  ALA      4.1     9.9    -      -       -      +
    277A  ILE      3.1     4.3    +      -       -      +
    279A  VAL*     1.3    79.7    -      -       +      +
    281A  VAL*     1.3    61.7    +      -       +      +
    283A  PHE*     2.8    26.8    +      -       +      +
    284A  ILE*     2.8    28.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 281 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91A  VAL*     5.2     2.9    -      -       +      +
     94A  TYR*     4.0    23.3    -      -       +      +
     95A  GLY*     4.4     4.7    -      -       -      +
     98A  PHE*     4.2    25.4    -      -       +      -
    277A  ILE*     3.0    35.5    +      -       +      +
    278A  SER*     4.7     4.3    -      -       -      +
    280A  VAL*     1.3    77.6    -      -       +      +
    282A  ALA*     1.3    62.2    +      -       -      +
    284A  ILE*     3.6     8.2    +      -       -      +
    285A  ALA*     3.1    21.3    +      -       -      +
    403A  THR*     5.0     4.9    -      -       -      +
    407A  ALA*     3.9    19.0    -      -       +      +
    497B  PHE*     4.5    12.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 282 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    278A  SER      3.3    20.8    +      -       -      +
    279A  VAL*     3.5     6.5    -      -       -      +
    280A  VAL      3.2     0.4    -      -       -      -
    281A  VAL*     1.3    79.3    -      -       -      +
    283A  PHE*     1.3    56.0    +      -       -      +
    285A  ALA*     3.1     4.8    +      -       -      +
    286A  LEU*     2.9    24.8    +      -       -      +
    360A  LEU*     3.7    12.6    -      -       +      -
    406A  GLN*     4.2    18.6    -      -       +      +
    407A  ALA*     4.5     5.9    -      -       -      +
    410A  LEU*     3.3    28.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 283 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    279A  VAL*     2.9    14.6    +      -       +      +
    280A  VAL*     2.8    17.2    +      -       +      +
    282A  ALA*     1.3    76.7    -      -       -      +
    284A  ILE*     1.3    69.3    +      -       +      +
    286A  LEU*     3.6    19.0    +      -       +      +
    287A  TYR*     3.3    25.1    +      +       +      +
    357A  LEU*     4.5    20.4    -      -       +      -
    360A  LEU*     4.5     7.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 284 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     95A  GLY*     3.7    33.7    -      -       -      +
     98A  PHE*     3.9    16.8    -      -       +      -
     99A  CYS*     3.9    22.4    -      -       -      -
    188A  PRO*     4.4    22.2    -      -       +      -
    192A  CYS*     5.4     6.7    -      -       +      -
    280A  VAL*     2.8    28.6    +      -       +      +
    281A  VAL*     4.0     6.1    -      -       -      +
    283A  PHE*     1.3    82.7    -      -       +      +
    285A  ALA*     1.3    57.8    +      -       -      +
    287A  TYR*     2.9    21.7    +      -       -      +
    288A  GLN*     3.0    18.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 285 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98A  PHE*     3.6    30.3    -      -       +      -
    281A  VAL      3.1    13.8    +      -       -      +
    282A  ALA*     3.1    12.4    +      -       -      +
    284A  ILE*     1.3    77.4    -      -       -      +
    286A  LEU*     1.3    61.8    +      -       -      +
    288A  GLN*     3.3     3.6    +      -       -      +
    289A  MET*     3.2    29.1    +      -       -      +
    407A  ALA*     4.2     8.5    -      -       +      +
    410A  LEU*     4.9     5.8    -      -       +      -
    411A  CYS*     3.9    15.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 286 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    282A  ALA      2.9    15.1    +      -       -      +
    283A  PHE*     3.7    24.2    -      -       +      +
    285A  ALA*     1.3    78.0    -      -       -      +
    287A  TYR*     1.3    60.4    +      -       -      +
    289A  MET*     4.3     0.5    -      -       -      +
    290A  ALA*     3.2    23.9    +      -       -      +
    353A  CYS*     4.0    33.4    -      -       -      +
    356A  ASN*     4.3    12.1    -      -       +      +
    357A  LEU*     4.3    21.8    -      -       +      +
    360A  LEU*     5.3     6.1    -      -       +      -
    410A  LEU*     4.3    11.6    -      -       +      +
    414A  MET*     3.7    36.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 287 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    184A  PHE*     3.7    14.2    +      -       -      +
    187A  LEU*     3.4    28.6    -      -       +      +
    188A  PRO*     3.6    29.4    -      -       +      -
    283A  PHE*     3.3    18.6    +      +       +      +
    284A  ILE*     2.9    12.2    +      -       -      +
    286A  LEU*     1.3    80.4    -      -       -      +
    288A  GLN*     1.3    84.4    +      -       -      +
    290A  ALA*     3.8     4.8    +      -       +      +
    291A  LEU*     3.4    28.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 288 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99A  CYS*     4.9     6.2    -      -       -      -
    102A  VAL*     3.4    45.8    -      -       +      +
    181A  TYR*     5.0     4.9    +      -       -      -
    185A  GLY*     3.9    22.2    +      -       -      +
    188A  PRO*     3.8    13.9    -      -       -      +
    284A  ILE*     3.0    23.9    +      -       +      +
    285A  ALA*     3.3     7.4    +      -       -      +
    286A  LEU      3.2     0.4    -      -       -      -
    287A  TYR*     1.3   107.7    -      -       -      +
    289A  MET*     1.3    64.2    +      -       +      +
    291A  LEU*     3.6     8.3    +      -       -      +
    292A  LEU*     3.1    27.0    +      -       -      +
    411A  CYS*     6.4     0.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with MET 289 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    285A  ALA      3.2    17.5    +      -       -      +
    286A  LEU      4.4     0.4    -      -       -      +
    288A  GLN*     1.3    79.1    -      -       +      +
    290A  ALA*     1.3    58.7    +      -       -      +
    292A  LEU*     3.9    18.2    -      -       +      +
    293A  LEU*     3.0    48.6    +      -       +      +
    411A  CYS*     3.6    50.5    -      -       +      +
    414A  MET*     4.0    21.1    -      -       +      -
    415A  ALA*     4.7    14.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 290 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    286A  LEU      3.2    18.8    +      -       -      +
    287A  TYR*     4.2     5.8    -      -       +      +
    289A  MET*     1.3    76.2    -      -       -      +
    291A  LEU*     1.3    59.4    +      -       -      +
    293A  LEU*     4.2     0.9    -      -       -      -
    294A  ILE*     3.3    29.5    +      -       -      +
    349A  VAL*     4.5    17.6    -      -       +      +
    353A  CYS*     4.5    19.3    -      -       -      -
    414A  MET*     4.9     6.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 291 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    181A  TYR*     3.7    25.8    -      -       +      +
    184A  PHE*     3.6    45.8    -      -       +      +
    185A  GLY*     3.8     6.7    -      -       -      +
    287A  TYR*     3.4    28.3    +      -       +      +
    288A  GLN*     3.6    10.3    +      -       -      +
    289A  MET      3.2     0.2    -      -       -      -
    290A  ALA*     1.3    79.3    -      -       -      +
    292A  LEU*     1.3    55.1    +      -       -      +
    293A  LEU      3.3     0.7    -      -       -      -
    294A  ILE*     4.9     3.4    -      -       +      -
    295A  SER*     2.4    49.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 292 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    102A  VAL*     6.4     2.5    -      -       +      -
    106A  LEU*     4.2    26.9    -      -       +      -
    177A  ILE*     5.6     7.2    -      -       +      -
    181A  TYR*     4.0    23.1    -      -       +      +
    288A  GLN      3.1    18.2    +      -       -      +
    289A  MET*     3.3    22.2    +      -       +      +
    291A  LEU*     1.3    77.4    -      -       -      +
    293A  LEU*     1.3    67.6    +      -       +      +
    295A  SER*     4.1     5.4    -      -       -      +
    296A  GLY*     3.4    19.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 293 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    289A  MET*     3.0    36.8    +      -       +      +
    290A  ALA      4.6     2.5    -      -       -      +
    291A  LEU      3.3     0.2    -      -       -      -
    292A  LEU*     1.3    82.8    -      -       +      +
    294A  ILE*     1.3    67.1    +      -       -      +
    296A  GLY      3.6     0.5    +      -       -      -
    297A  VAL*     3.4    16.4    -      -       +      +
    345A  TYR*     3.3    29.2    +      -       -      +
    349A  VAL*     4.4    17.5    -      -       +      -
    414A  MET*     4.0    18.2    -      -       +      +
    415A  ALA*     5.4     3.6    -      -       -      -
    418A  THR*     3.9    31.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 294 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    290A  ALA      3.3    20.5    +      -       -      +
    291A  LEU*     3.6     5.9    +      -       +      +
    292A  LEU      3.5     0.2    -      -       -      -
    293A  LEU*     1.3    77.7    -      -       -      +
    295A  SER*     1.3    61.1    +      -       -      +
    296A  GLY      3.1     5.2    +      -       -      -
    298A  LEU*     3.5    43.1    +      -       +      +
    345A  TYR*     4.9     6.5    -      -       +      -
    346A  VAL*     4.8    23.6    -      -       +      +
    349A  VAL*     4.2    29.8    -      -       +      -
    350A  THR*     6.3     1.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 295 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    177A  ILE*     3.3    22.3    -      -       -      +
    178A  TYR*     4.5    23.0    -      -       -      +
    181A  TYR*     3.5    28.4    -      -       -      -
    291A  LEU*     2.4    32.2    +      -       -      +
    292A  LEU*     3.9     4.1    -      -       -      +
    294A  ILE*     1.3    77.1    -      -       -      +
    296A  GLY*     1.3    55.4    +      -       -      +
    297A  VAL      3.8     0.2    -      -       -      -
    299A  PRO*     4.3    12.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 296 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    177A  ILE*     5.2     3.4    -      -       -      -
    292A  LEU*     3.4    15.8    +      -       -      -
    293A  LEU      3.6     0.2    +      -       -      -
    294A  ILE      3.1     1.2    +      -       -      -
    295A  SER*     1.3    80.2    -      -       -      +
    297A  VAL*     1.3    65.7    +      -       -      +
    299A  PRO*     4.1     6.9    -      -       -      +
    300A  THR*     4.3    12.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 297 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    293A  LEU*     3.4    12.1    -      -       +      +
    294A  ILE      3.6     0.4    +      -       -      -
    296A  GLY*     1.3    84.4    -      -       -      +
    298A  LEU*     1.3    67.7    +      -       -      +
    299A  PRO      3.3     1.6    -      -       -      -
    300A  THR*     3.0    25.0    +      -       -      +
    301A  LEU*     3.2    27.2    +      -       +      +
    345A  TYR*     3.3    46.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 298 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    178A  TYR*     6.4     0.9    -      -       +      -
    294A  ILE*     3.5    33.0    +      -       +      +
    297A  VAL*     1.3    80.0    -      -       +      +
    299A  PRO*     1.3    65.9    -      -       +      +
    301A  LEU*     3.8    17.3    -      -       +      -
    302A  HIS*     3.0    42.6    +      -       +      +
    342A  GLU*     3.8    38.1    -      -       +      +
    345A  TYR*     5.3     6.7    -      -       +      -
    346A  VAL*     4.6    18.6    -      -       +      -
----------------------------------------------------------
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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