Contacts of the helix formed by residues 66 - 88 (chain D) in PDB entry 3DOY


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 66 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     27C  MET*     3.9    16.2    -      -       +      -
     72C  GLU*     5.4     1.3    -      -       -      +
     54D  VAL*     3.7    26.5    -      -       +      -
     58D  HIS*     3.6    34.8    -      -       +      +
     64D  ILE      3.3     6.7    -      -       -      +
     65D  PHE*     1.3    94.5    -      -       +      +
     67D  GLY*     1.3    67.2    -      -       -      +
     68D  VAL*     4.3     4.7    -      -       +      -
     69D  LEU*     2.9    33.1    +      -       +      +
     70D  ILE*     3.2    10.6    +      -       -      +
   1004D   CL      4.1     0.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 67 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     72C  GLU*     5.8     0.2    +      -       -      -
     65D  PHE      3.4     2.0    +      -       -      -
     66D  PRO*     1.3    71.1    -      -       -      +
     68D  VAL*     1.3    61.4    +      -       -      +
     70D  ILE*     3.0    25.7    +      -       -      +
     71D  VAL*     3.2     8.8    +      -       -      +
    109D  PHE*     3.3    37.0    -      -       -      -
   1004D   CL      3.3    20.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 68 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     27C  MET*     4.9     0.2    -      -       +      -
     68C  VAL*     3.5    45.1    -      -       +      +
     69C  LEU*     4.4    10.1    -      -       +      -
     71C  VAL*     4.7     4.3    -      -       +      -
     72C  GLU*     3.7    38.1    -      -       +      +
     75C  ALA*     6.2     1.1    -      -       +      -
    104C  ILE*     4.5    20.4    -      -       +      -
     66D  PRO*     4.3    11.4    -      -       +      -
     67D  GLY*     1.3    76.5    -      -       -      +
     69D  LEU*     1.3    66.5    +      -       +      +
     71D  VAL*     3.4     7.8    +      -       -      +
     72D  GLU      3.0    20.6    +      -       -      -
    109D  PHE*     4.1     1.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 69 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     27C  MET*     5.0     4.0    -      -       -      -
     68C  VAL*     4.5    14.1    -      -       +      -
     69C  LEU*     4.6     9.2    -      -       +      -
     27D  MET*     4.5    17.0    -      -       +      -
     29D  LEU*     3.8    26.2    -      -       +      +
     54D  VAL*     4.0    29.4    -      -       +      -
     65D  PHE*     3.9    26.7    -      -       +      -
     66D  PRO*     2.9    25.1    +      -       +      +
     68D  VAL*     1.3    86.3    -      -       +      +
     70D  ILE*     1.3    61.3    +      -       -      +
     72D  GLU*     3.3     4.9    +      -       +      +
     73D  GLY*     2.9    24.3    +      -       -      -
    121D  TYR*     4.7     0.5    +      -       -      -
----------------------------------------------------------
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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
----------------------------------------------------------
     65D  PHE*     3.6    25.6    -      -       +      +
     66D  PRO      3.2    10.2    +      -       -      +
     67D  GLY*     3.0    22.3    +      -       -      +
     69D  LEU*     1.3    78.0    -      -       -      +
     71D  VAL*     1.3    61.2    +      -       +      +
     73D  GLY*     3.2     3.5    +      -       -      -
     74D  MET*     3.1    24.0    +      -       -      +
    109D  PHE*     4.9    10.3    -      -       +      -
    111D  ILE      5.4     2.7    -      -       -      +
    113D  VAL*     3.8    26.9    -      -       +      +
    119D  LEU*     3.9    13.5    -      -       +      -
    121D  TYR*     3.7     2.8    -      -       +      -
    139D  ALA*     3.6    30.3    -      -       +      -
    146D  VAL*     4.9     5.2    -      -       +      +
    147D  ALA*     4.3    10.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 71 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     68C  VAL*     4.6     1.8    -      -       +      -
    104C  ILE*     5.8     2.2    -      -       +      -
     67D  GLY      3.2    11.5    +      -       -      +
     68D  VAL*     3.6    10.1    -      -       -      +
     69D  LEU      3.2     0.2    -      -       -      -
     70D  ILE*     1.3    75.4    -      -       +      +
     72D  GLU*     1.3    60.0    +      -       -      +
     74D  MET*     3.0    12.9    +      -       -      +
     75D  ALA*     2.8    26.5    +      -       -      +
    101D  PHE*     4.0    19.3    -      -       +      -
    104D  ILE*     4.1    22.7    -      -       +      -
    107D  VAL*     4.6     8.5    -      -       +      -
    109D  PHE*     4.3    18.4    -      -       +      -
    148D  GLU      5.4     0.7    -      -       -      +
    149D  ALA*     4.4    18.8    -      -       +      -
    151D  LEU*     4.0    11.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 72 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     58C  HIS*     4.3     7.9    +      -       -      -
     66C  PRO*     5.2     1.2    -      -       -      +
     67C  GLY      5.5     0.7    +      -       -      -
     68C  VAL*     3.6    20.3    +      -       +      +
     23D  HIS*     3.8    17.0    +      -       -      -
     27D  MET*     4.1    20.5    -      -       +      +
     29D  LEU*     3.9    13.2    -      -       +      -
     68D  VAL      3.0    13.7    +      -       -      +
     69D  LEU*     3.4    12.3    -      -       -      +
     71D  VAL*     1.3    75.3    -      -       -      +
     73D  GLY*     1.3    57.2    +      -       -      +
     75D  ALA*     3.1     8.7    +      -       -      +
     76D  GLN*     2.9    52.0    +      -       -      +
    101D  PHE*     3.4    22.6    -      -       -      -
----------------------------------------------------------
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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
----------------------------------------------------------
     29D  LEU*     4.1    12.3    -      -       -      +
     30D  VAL*     3.8     2.9    -      -       -      +
     69D  LEU      2.9    11.6    +      -       -      -
     70D  ILE      3.2     1.3    +      -       -      -
     71D  VAL      3.1     0.4    -      -       -      -
     72D  GLU*     1.3    77.6    -      -       -      +
     74D  MET*     1.3    61.0    +      -       -      +
     76D  GLN*     3.2     6.7    +      -       -      +
     77D  SER*     3.1    25.1    +      -       -      -
    121D  TYR*     3.4    31.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with MET 74 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     70D  ILE*     3.1    18.1    +      -       -      +
     71D  VAL*     3.0    13.5    +      -       -      +
     73D  GLY*     1.3    75.8    -      -       -      +
     75D  ALA*     1.3    63.3    +      -       -      +
     77D  SER      3.2     0.5    +      -       -      -
     78D  GLY*     2.9     9.0    +      -       -      -
    121D  TYR*     3.7    19.7    -      -       +      -
    123D  LEU*     2.8    47.2    -      -       +      +
    135D  VAL*     5.0     0.3    -      -       -      +
    137D  GLY      3.5    11.9    -      -       -      +
    138D  THR*     3.3    41.5    -      -       -      +
    139D  ALA*     4.2    14.8    -      -       +      -
    147D  ALA*     5.2     2.2    -      -       -      +
    148D  GLU      4.9     2.5    -      -       -      -
    149D  ALA*     4.2    23.8    -      -       +      +
    151D  LEU*     4.4     7.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 75 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     71D  VAL      2.8     6.2    +      -       -      +
     72D  GLU*     3.2    11.0    -      -       -      +
     74D  MET*     1.3    78.2    -      -       -      +
     76D  GLN*     1.3    57.4    +      -       +      +
     78D  GLY*     3.2     1.9    +      -       -      -
     79D  GLY*     2.8    26.2    +      -       -      -
     99D  VAL*     5.8     2.1    -      -       -      +
    101D  PHE*     3.2    42.4    -      -       +      -
    151D  LEU*     3.9    19.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 76 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     21D  LEU*     3.9    13.2    -      -       +      +
     23D  HIS*     3.1    32.8    -      -       +      +
     27D  MET      2.5    25.7    -      -       -      +
     28D  LEU*     3.6    11.1    -      -       -      +
     29D  LEU*     2.7    31.9    +      -       -      +
     30D  VAL*     3.3    25.2    -      -       +      +
     72D  GLU*     2.9    29.8    +      -       -      +
     73D  GLY      3.2     2.4    +      -       -      +
     75D  ALA*     1.3    72.8    -      -       +      +
     77D  SER*     1.3    60.6    +      -       -      +
     79D  GLY*     3.2     2.5    +      -       -      +
     80D  PHE*     2.9    27.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 77 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     30D  VAL*     4.0     7.4    -      -       -      +
     33D  ILE*     5.6     0.2    -      -       -      -
     42D  ILE*     3.6    21.8    -      -       -      +
     44D  ALA*     3.7    13.4    -      -       -      +
     73D  GLY      3.1     5.6    +      -       -      -
     74D  MET      3.5     0.7    -      -       -      -
     76D  GLN*     1.3    75.1    -      -       -      +
     78D  GLY*     1.3    64.8    +      -       -      +
     80D  PHE*     3.1     9.2    +      -       -      +
     81D  LEU*     3.0    18.5    +      -       -      +
    121D  TYR*     3.2    33.9    -      -       -      +
    123D  LEU*     3.5    21.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 78 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     42D  ILE*     4.9     1.6    -      -       -      -
     74D  MET      2.9    14.0    +      -       -      -
     75D  ALA      3.6     3.4    -      -       -      -
     77D  SER*     1.3    77.4    -      -       -      +
     79D  GLY*     1.3    56.3    +      -       -      +
     81D  LEU*     3.0     9.7    +      -       -      +
     82D  ALA*     2.8    30.4    +      -       -      +
    123D  LEU*     3.8     8.0    -      -       -      +
    133D  TRP*     5.6     1.0    -      -       -      -
    135D  VAL*     4.5    24.2    -      -       -      +
    151D  LEU*     5.8     0.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 79 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     21D  LEU*     4.3     8.9    -      -       -      +
     75D  ALA      2.8    14.9    +      -       -      -
     76D  GLN*     3.2     4.2    +      -       -      -
     77D  SER      3.2     0.2    -      -       -      -
     78D  GLY*     1.3    75.0    -      -       -      +
     80D  PHE*     1.3    61.7    +      -       -      +
     82D  ALA*     3.6     7.1    -      -       -      +
     83D  PHE*     3.0    26.5    +      -       -      +
     99D  VAL*     4.9    21.1    -      -       -      +
    153D  ALA*     6.0     2.0    -      -       -      -
    155D  ILE*     4.8     2.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 80 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     12D  PHE*     3.7    39.3    -      +       +      -
     16D  HIS      4.4     0.7    -      -       -      -
     17D  ILE*     4.0    25.6    -      -       +      -
     20D  ILE*     3.7    38.8    -      -       +      -
     21D  LEU*     3.9    19.2    -      -       +      +
     30D  VAL*     6.5     0.2    -      -       +      -
     33D  ILE*     4.1    10.3    -      -       +      -
     36D  LEU*     3.7    26.9    -      -       +      -
     42D  ILE*     3.9     9.6    -      -       +      -
     76D  GLN      2.9    13.2    +      -       -      +
     77D  SER*     3.1     9.6    +      -       -      +
     79D  GLY*     1.3    76.7    -      -       -      +
     81D  LEU*     1.3    61.3    +      -       -      +
     83D  PHE*     4.2     0.5    -      -       -      +
     84D  THR*     2.9    43.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 81 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     36D  LEU*     4.0    18.6    -      -       +      -
     37D  GLN      3.5    24.0    -      -       -      +
     38D  ALA*     4.5     0.4    -      -       -      -
     39D  ASN      4.1     1.1    -      -       -      +
     41D  LYS*     3.5    32.1    -      -       -      +
     42D  ILE*     4.0    13.5    -      -       +      -
     77D  SER      3.0    12.7    +      -       -      +
     78D  GLY*     3.3    11.9    -      -       -      +
     80D  PHE*     1.3    75.0    -      -       -      +
     82D  ALA*     1.3    57.6    +      -       -      +
     84D  THR*     3.3     5.7    +      -       -      -
     85D  SER*     2.6    47.7    +      -       -      +
    123D  LEU*     4.7     2.7    -      -       +      +
    125D  VAL*     3.7    29.8    -      -       +      +
    133D  TRP*     4.9     0.9    -      -       +      -
    135D  VAL*     5.2     4.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 82 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     78D  GLY      2.8    14.9    +      -       -      +
     79D  GLY*     3.6     9.2    -      -       -      +
     81D  LEU*     1.3    77.4    -      -       -      +
     83D  PHE*     1.3    63.5    +      -       -      +
     85D  SER*     3.2    15.2    +      -       -      -
     86D  LEU*     3.2     9.9    +      -       -      +
    133D  TRP*     3.5    54.6    -      -       +      -
    155D  ILE*     3.9    12.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 83 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     20D  ILE*     3.6    26.9    -      -       +      -
     21D  LEU*     6.2     0.4    -      -       +      -
     79D  GLY      3.0    14.1    +      -       -      +
     80D  PHE      4.2     2.9    -      -       -      +
     82D  ALA*     1.3    79.5    -      -       -      +
     84D  THR*     1.3    61.0    +      -       -      +
     86D  LEU*     3.0     4.2    +      -       -      -
     87D  TRP*     2.8    69.0    +      +       +      -
     88D  GLY      3.7    17.5    -      -       -      -
     90D  ASP      3.5    15.3    -      -       -      -
     93D  ILE*     3.8    13.0    -      -       +      -
     94D  ALA*     3.3    41.3    -      -       +      -
     97D  LYS*     4.1     9.0    -      -       +      -
    155D  ILE*     3.9    15.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with THR 84 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     12D  PHE*     5.2     7.4    -      -       +      -
     20D  ILE*     4.5     6.3    -      -       +      -
     36D  LEU*     3.6    23.4    -      -       -      +
     38D  ALA*     5.5     1.0    -      -       -      +
     80D  PHE*     2.9    44.7    +      -       +      +
     81D  LEU      3.3     4.0    +      -       -      -
     83D  PHE*     1.3    84.7    -      -       +      +
     85D  SER*     1.3    62.0    +      -       -      +
     86D  LEU      3.3     0.2    -      -       -      -
     88D  GLY*     2.8    47.5    +      -       -      +
     89D  PHE*     4.6     4.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 85 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     38D  ALA*     3.8    12.3    -      -       -      +
     39D  ASN*     3.0    36.7    +      -       -      +
     81D  LEU*     2.6    30.5    +      -       -      +
     82D  ALA      3.2     7.0    -      -       -      -
     83D  PHE      3.0     0.2    -      -       -      -
     84D  THR*     1.3    80.8    +      -       -      +
     86D  LEU*     1.3    63.5    +      -       -      +
     88D  GLY      5.0     0.2    +      -       -      -
    133D  TRP*     3.4    21.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 86 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     39D  ASN*     4.1     9.4    -      -       -      +
     82D  ALA      3.2     5.6    +      -       -      +
     83D  PHE      3.0     3.8    +      -       -      +
     85D  SER*     1.3    85.7    -      -       -      +
     87D  TRP*     1.3    81.2    +      -       +      +
    128D  HIS*     5.0     5.2    -      -       +      -
    130D  GLY*     3.3    27.1    -      -       -      +
    131D  MET*     3.9    20.0    -      -       +      -
    133D  TRP*     3.6    30.3    -      -       +      +
    155D  ILE*     5.4     1.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with TRP 87 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     83D  PHE*     2.8    67.8    +      +       +      +
     86D  LEU*     1.3    89.1    +      -       +      +
     88D  GLY*     1.3    64.2    +      -       -      +
     89D  PHE      4.5     0.3    -      -       -      -
     90D  ASP*     3.7    17.3    -      -       +      +
     93D  ILE*     3.4    33.7    -      -       +      +
     97D  LYS*     3.2    32.5    -      -       +      -
    131D  MET*     3.5    30.1    -      -       +      -
    155D  ILE*     4.3    15.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 88 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     83D  PHE*     3.7     8.1    -      -       -      -
     84D  THR*     2.8    41.9    +      -       -      +
     85D  SER      4.7     0.2    -      -       -      -
     86D  LEU      3.9     0.2    -      -       -      -
     87D  TRP*     1.3    81.7    -      -       -      +
     89D  PHE*     1.3    57.6    +      -       -      -
     90D  ASP      2.9     8.3    +      -       -      -
----------------------------------------------------------
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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