Contacts of the helix formed by residues 67 - 89 (chain D) in PDB entry 1B06


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 LEU 67 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     52D  LEU*     4.7     7.2    -      -       +      -
     55D  LEU*     3.8    26.7    -      -       +      -
     65D  TYR*     3.6    13.8    +      -       +      -
     66D  ASP*     1.3    70.8    -      -       -      +
     68D  GLN*     1.3    63.0    -      -       -      +
     70D  ILE*     2.9    13.3    +      -       +      +
     71D  LEU*     2.9    49.1    +      -       +      +
    122F  VAL*     5.0     2.7    -      -       +      +
    125F  GLU*     3.8    39.0    -      -       +      +
    126F  SER*     3.8    26.5    -      -       -      +
    129F  SER*     4.5    10.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 68 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     66D  ASP      3.1     1.0    +      -       -      -
     67D  LEU*     1.3    78.6    -      -       -      +
     69D  GLY*     1.3    55.9    +      -       -      +
     71D  LEU*     4.2     6.0    -      -       -      +
     72D  ARG*     3.0    41.9    +      -       -      +
     69E  GLY*     4.4    13.5    -      -       -      +
     72E  ARG*     4.7     6.4    +      -       +      -
    129F  SER*     2.9    47.6    +      -       -      +
    130F  LEU      4.1     0.4    -      -       -      +
    131F  PRO*     3.8    20.1    -      -       +      +
    151F  THR*     3.2    29.1    +      -       -      +
    153F  GLU*     4.4     7.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 69 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48D  LEU*     4.8     3.9    -      -       -      +
     66D  ASP      2.7    17.8    +      -       -      -
     68D  GLN*     1.3    74.4    -      -       -      +
     70D  ILE*     1.3    55.6    +      -       -      -
     72D  ARG*     4.7     1.2    -      -       -      +
     73D  GLY*     3.2    22.5    +      -       -      -
     66E  ASP*     4.1    11.4    -      -       -      -
     68E  GLN*     4.4    11.2    -      -       -      +
     69E  GLY*     3.6    24.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 70 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48D  LEU*     4.1    30.6    -      -       +      +
     51D  ARG*     4.2    17.7    -      -       +      +
     52D  LEU*     4.3    18.2    -      -       +      +
     55D  LEU*     4.1    20.2    -      -       +      -
     60D  LEU*     5.3     0.7    -      -       +      -
     65D  TYR*     4.1    19.1    -      -       +      -
     66D  ASP      4.1     1.3    -      -       -      +
     67D  LEU*     2.9    12.2    +      -       +      +
     69D  GLY*     1.3    75.8    -      -       -      +
     71D  LEU*     1.3    64.9    +      -       +      +
     73D  GLY*     3.3     1.9    +      -       -      -
     74D  LEU*     3.0    40.6    +      -       +      +
     66E  ASP*     3.6    31.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 71 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     52D  LEU*     5.1     9.6    -      -       +      -
     67D  LEU*     2.9    46.1    +      -       +      +
     68D  GLN*     4.2     9.6    -      -       -      +
     70D  ILE*     1.3    72.9    -      -       -      +
     72D  ARG*     1.3    60.9    +      -       -      +
     74D  LEU*     3.1    22.7    +      -       +      +
     75D  THR      3.3     1.2    +      -       -      -
    126F  SER*     4.0    17.0    -      -       -      +
    129F  SER*     4.4     0.9    -      -       -      +
    148F  GLN*     4.7     1.8    -      -       -      +
    149F  ILE*     3.9    26.9    -      -       +      +
    150F  MET*     3.2    27.2    -      -       +      +
    151F  THR*     4.0    37.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 72 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    131C  PRO*     4.3    10.9    -      -       -      +
    153C  GLU*     2.8    43.4    +      -       -      -
    157C  MET*     5.8     1.2    -      -       -      -
     68D  GLN*     3.0    26.6    +      -       -      +
     69D  GLY*     4.7     1.3    -      -       -      +
     71D  LEU*     1.3    74.0    -      -       -      +
     73D  GLY*     1.3    64.9    +      -       -      +
     75D  THR*     3.3    19.0    +      -       -      +
     76D  PHE*     3.3    14.6    +      -       -      +
    156D  PHE*     3.5    36.1    -      -       +      -
    157D  MET*     5.0     5.3    -      -       -      -
     68E  GLN*     4.6     5.0    +      -       +      -
     72E  ARG*     3.3    54.3    -      -       -      +
    150F  MET*     5.2     0.9    -      -       -      -
    153F  GLU*     4.1     7.5    +      -       -      -
    157F  MET*     6.4     0.2    -      -       -      -
    158F  ASN*     4.3    10.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 73 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48D  LEU*     3.4    16.6    -      -       -      -
     69D  GLY      3.2    19.6    +      -       -      -
     70D  ILE      3.7     0.2    -      -       -      -
     71D  LEU      3.2     0.8    -      -       -      -
     72D  ARG*     1.3    77.9    -      -       -      +
     74D  LEU*     1.3    58.0    +      -       -      +
     76D  PHE*     3.6     4.7    +      -       -      +
     77D  ASN*     2.9    37.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 74 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45D  ALA*     3.8    14.6    -      -       -      +
     48D  LEU*     3.6    25.4    -      -       +      -
     49D  LEU*     4.4    11.0    -      -       +      -
     52D  LEU*     4.0    20.2    -      -       +      -
     70D  ILE*     3.0    27.4    +      -       +      +
     71D  LEU*     3.1    13.4    +      -       +      +
     73D  GLY*     1.3    76.0    -      -       -      +
     75D  THR*     1.3    57.4    +      -       -      +
     77D  ASN*     4.9     0.2    -      -       -      -
     78D  ILE*     2.7    60.8    +      -       +      +
    148F  GLN*     3.7    26.0    -      -       -      +
    150F  MET*     4.2     7.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 75 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     71D  LEU      3.3     9.2    +      -       -      -
     72D  ARG*     3.3    17.4    +      -       -      +
     74D  LEU*     1.3    77.1    -      -       -      +
     76D  PHE*     1.3    59.7    +      -       -      +
     79D  ASN*     2.9    48.9    +      -       -      +
    156D  PHE*     3.9    12.1    -      -       +      +
    150F  MET*     3.7    14.8    -      -       -      +
    158F  ASN*     2.6    48.9    +      -       +      +
    159F  HIS      3.8     0.4    -      -       -      +
    160F  ILE*     4.0    10.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 76 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    131C  PRO*     3.8    33.0    -      -       +      -
    132C  GLY*     3.7    19.1    -      -       -      -
     41D  TYR*     4.0    21.9    -      +       -      -
     72D  ARG      3.3    15.0    +      -       -      +
     73D  GLY*     3.7     5.4    -      -       -      +
     74D  LEU      3.2     0.2    -      -       -      -
     75D  THR*     1.3    80.7    -      -       -      +
     77D  ASN*     1.3    80.0    +      -       -      +
     80D  GLY*     3.0    24.1    +      -       -      -
    154D  ASN*     3.3    25.8    -      -       -      -
    155D  HIS*     3.6    19.8    -      +       -      +
    156D  PHE*     3.9    22.4    -      +       +      -
    172D  PHE*     5.2     1.3    -      +       -      -
----------------------------------------------------------
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Residues in contact with ASN 77 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     40D  GLY      4.2     1.2    -      -       -      +
     41D  TYR*     3.6    44.8    -      -       -      +
     44D  GLY*     3.9    11.1    -      -       -      -
     45D  ALA*     3.6    20.2    -      -       -      +
     48D  LEU*     3.8    14.3    -      -       -      +
     73D  GLY*     2.9    25.4    +      -       -      +
     74D  LEU      4.3     0.7    -      -       -      +
     76D  PHE*     1.3    93.5    -      -       -      +
     78D  ILE*     1.3    65.1    +      -       -      +
     80D  GLY      3.3     0.6    +      -       -      +
     81D  HIS*     3.0    23.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 78 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      9D  TYR*     3.7    35.9    -      -       +      +
     45D  ALA*     4.1    12.6    -      -       +      -
     49D  LEU*     5.4     1.3    -      -       +      -
     74D  LEU*     2.7    44.9    +      -       +      +
     75D  THR      4.7     0.2    -      -       -      +
     77D  ASN*     1.3    72.1    -      -       -      +
     79D  ASN*     1.3    56.8    +      -       -      +
     81D  HIS*     3.3     5.8    +      -       -      +
     82D  LYS*     3.0    54.5    +      -       +      +
    148F  GLN*     4.1    19.1    -      -       +      +
    160F  ILE*     4.0    28.9    -      -       +      -
    163F  LEU*     5.8     0.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 79 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     75D  THR*     2.9    37.5    +      -       -      +
     78D  ILE*     1.3    74.8    -      -       -      +
     80D  GLY*     1.3    66.3    +      -       -      +
     82D  LYS*     4.6     4.3    -      -       -      +
     83D  LEU*     2.9    32.8    +      -       -      +
    155D  HIS*     3.4    25.1    -      -       +      +
    156D  PHE*     3.6     6.3    -      -       -      +
    159D  HIS*     3.7     3.3    +      -       -      -
    159F  HIS      2.9    23.7    +      -       -      -
    160F  ILE*     3.6     8.9    -      -       -      +
    161F  ALA*     3.0    34.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 80 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41D  TYR*     3.8    12.0    -      -       -      -
     76D  PHE      3.0    19.3    +      -       -      -
     77D  ASN      3.3     2.2    +      -       -      -
     78D  ILE      3.2     0.4    -      -       -      -
     79D  ASN*     1.3    77.5    -      -       -      +
     81D  HIS*     1.3    60.1    +      -       -      +
     83D  LEU*     5.1     0.2    -      -       -      -
     84D  HIS*     2.5    34.0    +      -       -      +
    155D  HIS*     3.8    26.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 81 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      9D  TYR*     3.7    26.4    -      +       +      +
     10D  GLU      3.8    19.8    +      -       -      -
     12D  PRO*     4.0    14.6    -      -       +      -
     38D  HIS*     3.1    28.6    +      -       -      +
     41D  TYR*     3.8     9.1    -      -       +      +
     42D  VAL*     3.7    16.8    -      -       +      +
     45D  ALA*     5.8     1.3    -      -       +      -
     77D  ASN      3.0    16.2    +      -       -      +
     78D  ILE*     3.6     4.7    -      -       -      +
     80D  GLY*     1.3    74.3    -      -       -      +
     82D  LYS*     1.3    79.0    +      -       +      +
     84D  HIS      3.2     2.3    +      -       -      -
     85D  ALA*     3.0    25.4    +      -       +      +
    143F  GLU*     2.7    31.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 82 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      9D  TYR*     4.2     2.9    -      -       -      -
     78D  ILE*     3.0    41.4    +      -       +      +
     79D  ASN*     4.2     4.9    -      -       -      +
     81D  HIS*     1.3    81.3    -      -       +      +
     83D  LEU*     1.3    65.6    +      -       +      +
     85D  ALA*     3.4     8.6    +      -       -      +
     86D  ILE*     3.2    31.8    +      -       +      +
    141F  ASP*     2.6    37.1    +      -       -      -
    142F  ASN*     5.3     2.2    -      -       -      +
    143F  GLU*     2.8    35.5    +      -       -      +
    160F  ILE*     4.2    16.6    -      -       +      -
    161F  ALA*     4.6    12.3    -      -       +      +
    162F  GLU*     6.1     0.9    -      -       -      +
    163F  LEU*     4.3     7.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 83 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     79D  ASN*     2.9    23.5    +      -       -      +
     82D  LYS*     1.3    76.1    -      -       +      +
     84D  HIS*     1.3    61.0    +      -       -      +
     86D  ILE*     3.4    14.7    +      -       +      +
     87D  TYR*     3.0    27.0    +      -       -      +
    135D  TRP*     3.6    48.5    -      -       +      +
    137D  VAL*     5.7     0.2    -      -       +      -
    155D  HIS*     3.6    25.4    -      -       -      +
    159D  HIS*     3.9    14.8    -      -       +      +
    165D  VAL*     4.8     4.7    -      -       +      -
    168D  ILE*     4.1    18.5    -      -       +      +
    161F  ALA*     3.8    24.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with HIS 84 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     33D  HIS*     3.2    20.3    +      +       -      -
     38D  HIS*     3.7    26.7    -      +       +      +
     41D  TYR*     3.4    26.7    -      +       -      -
     80D  GLY      2.5    29.1    +      -       -      +
     81D  HIS      3.2     3.2    +      -       -      +
     83D  LEU*     1.3    76.3    -      -       -      +
     85D  ALA*     1.3    63.7    +      -       -      +
     87D  TYR*     3.3     7.9    +      +       -      +
     88D  TRP*     2.8    44.4    +      +       -      +
    135D  TRP*     3.5    22.2    -      +       -      -
    155D  HIS*     3.8     7.2    -      +       -      -
    170D  ASP*     3.3     1.4    +      -       -      -
    174D  HIS*     3.9     0.4    +      -       -      -
    325D   FE      2.2    31.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 85 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     12D  PRO*     4.6    12.1    -      -       +      -
     38D  HIS*     3.8    12.1    -      -       +      -
     81D  HIS*     3.0    19.3    +      -       +      +
     82D  LYS*     3.5    13.5    -      -       -      +
     83D  LEU      3.2     0.2    -      -       -      -
     84D  HIS*     1.3    79.7    -      -       -      +
     86D  ILE*     1.3    59.9    +      -       +      +
     88D  TRP*     3.9     5.2    +      -       -      +
     89D  ASN*     3.0    31.9    +      -       -      +
    203D  ARG*     5.5     0.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 86 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     82D  LYS*     3.2    22.1    +      -       +      +
     83D  LEU*     3.4    14.8    +      -       +      +
     84D  HIS      3.2     0.2    -      -       -      -
     85D  ALA*     1.3    75.2    -      -       +      +
     87D  TYR*     1.3    55.6    +      -       -      +
     89D  ASN*     3.2     3.6    +      -       -      +
     90D  ASN*     2.8    41.2    +      -       +      +
    165D  VAL*     4.0    23.8    -      -       +      -
    166D  ILE      5.9     0.2    -      -       -      +
    168D  ILE*     3.9    17.9    -      -       +      -
    203D  ARG*     3.6    40.3    +      -       -      +
    161F  ALA*     5.8     0.4    -      -       +      -
    162F  GLU*     3.7    31.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 87 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     25D  ILE*     4.2     8.8    -      -       -      +
     30D  ILE*     6.1     0.2    -      -       +      -
     33D  HIS*     3.7    22.2    +      +       -      -
     83D  LEU      3.0    18.3    +      -       -      +
     84D  HIS*     3.4     9.2    -      +       -      +
     86D  ILE*     1.3    76.7    -      -       -      +
     88D  TRP*     1.3   101.4    +      +       -      +
     90D  ASN*     3.1    12.1    +      -       -      +
     91D  MET*     3.5    40.4    +      -       +      +
    135D  TRP*     3.9    10.3    -      +       +      -
    168D  ILE*     3.9    27.3    -      -       +      +
    169D  VAL*     4.4     1.3    -      -       -      -
    170D  ASP*     3.6    30.7    -      -       +      +
    175D  ALA*     4.5     2.1    +      -       -      +
    187D  TYR*     2.8    24.1    +      -       -      -
    191D  TRP*     4.5     3.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with TRP 88 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     12D  PRO*     5.5     2.2    -      -       +      -
     13D  GLN      5.8     1.6    -      -       -      -
     14D  LEU*     3.8    20.2    -      -       +      -
     15D  PRO*     3.9    21.8    -      -       +      -
     16D  TYR*     2.8    29.6    +      +       -      +
     30D  ILE*     4.1    22.7    -      -       +      -
     33D  HIS*     3.5    37.2    -      +       +      -
     34D  TYR*     4.0    29.7    -      +       +      -
     38D  HIS*     2.9    31.1    +      +       -      -
     84D  HIS*     2.8    34.0    +      +       +      +
     85D  ALA*     4.1     6.3    -      -       -      +
     86D  ILE      3.4     0.4    -      -       -      -
     87D  TYR*     1.3    98.6    -      +       -      +
     89D  ASN*     1.3    61.3    +      -       -      +
     91D  MET*     3.4    18.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 89 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     15D  PRO*     3.4    24.2    -      -       -      +
     85D  ALA*     3.0    21.6    +      -       -      +
     86D  ILE*     3.2     7.1    +      -       -      +
     88D  TRP*     1.3    73.0    -      -       -      +
     90D  ASN*     1.3    57.1    +      -       -      +
     91D  MET      3.1     6.8    +      -       -      +
    196D  ASN*     3.1    26.3    +      -       -      -
    199D  ASP*     3.2    22.1    -      -       -      +
    203D  ARG*     4.1     8.9    -      -       -      +
----------------------------------------------------------
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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