Contacts of the helix formed by residues 66 - 88 (chain A) 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 A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     54A  VAL*     3.6    32.8    -      -       +      -
     58A  HIS*     3.7    11.4    -      -       +      +
     64A  ILE      3.2     6.2    -      -       -      +
     65A  PHE*     1.3    92.3    -      -       +      +
     67A  GLY*     1.3    66.0    +      -       -      +
     68A  VAL*     4.1     7.2    -      -       +      -
     69A  LEU*     2.9    34.6    +      -       +      +
     70A  ILE*     3.1    12.0    +      -       -      +
   1001A   CL      3.8     9.0    -      -       +      -
     27B  MET*     3.7    24.9    -      -       +      -
     72B  GLU*     5.5     0.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 67 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65A  PHE      3.4     1.6    +      -       -      -
     66A  PRO*     1.3    72.2    -      -       -      +
     68A  VAL*     1.3    61.8    +      -       -      +
     70A  ILE*     3.0    25.2    +      -       -      +
     71A  VAL*     3.1     9.4    +      -       -      +
    109A  PHE*     3.2    36.1    -      -       -      -
   1001A   CL      3.0    20.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 68 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     66A  PRO*     4.1    13.9    -      -       +      -
     67A  GLY*     1.3    76.7    -      -       -      +
     69A  LEU*     1.3    66.1    +      -       +      +
     71A  VAL*     3.3    10.9    +      -       -      +
     72A  GLU*     3.0    25.8    +      -       -      +
    109A  PHE*     4.0     1.5    -      -       +      -
     27B  MET*     4.9     0.4    -      -       +      -
     68B  VAL*     3.6    33.9    -      -       +      +
     69B  LEU*     4.4     8.5    -      -       +      -
     71B  VAL*     4.5    11.9    -      -       +      -
     72B  GLU*     3.6    44.4    +      -       +      +
     75B  ALA*     6.2     0.4    -      -       +      -
    104B  ILE*     4.6    13.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 69 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     27A  MET*     4.5    16.4    -      -       -      -
     29A  LEU*     3.6    26.4    -      -       +      +
     54A  VAL*     4.0    15.5    -      -       +      -
     65A  PHE*     3.8    26.1    -      -       +      -
     66A  PRO*     2.9    40.6    +      -       +      +
     68A  VAL*     1.3    78.0    -      -       +      +
     70A  ILE*     1.3    60.9    +      -       -      +
     72A  GLU*     3.4     4.1    +      -       +      +
     73A  GLY*     2.9    23.4    +      -       -      -
    121A  TYR*     4.6     0.5    +      -       -      -
     27B  MET*     5.1     4.3    -      -       -      -
     68B  VAL*     4.4    15.7    -      -       +      -
     69B  LEU*     4.5    12.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 70 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65A  PHE*     3.8    21.3    -      -       +      +
     66A  PRO      3.1    10.4    +      -       -      +
     67A  GLY*     3.0    21.4    +      -       -      +
     69A  LEU*     1.3    77.1    -      -       -      +
     71A  VAL*     1.3    63.8    +      -       +      +
     73A  GLY*     3.2     2.4    +      -       -      -
     74A  MET*     3.1    25.5    +      -       -      +
    109A  PHE*     4.8     3.4    -      -       +      -
    111A  ILE      5.3     2.5    -      -       -      +
    113A  VAL*     3.7    28.3    -      -       +      +
    119A  LEU*     3.9    13.5    -      -       +      -
    121A  TYR*     3.7     2.8    -      -       +      -
    139A  ALA*     3.4    32.1    -      -       +      -
    146A  VAL*     4.7     1.8    -      -       +      +
    147A  ALA*     4.0    20.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 71 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     67A  GLY      3.1    11.6    +      -       -      +
     68A  VAL*     3.4    11.4    -      -       +      +
     70A  ILE*     1.3    78.9    -      -       +      +
     72A  GLU*     1.3    58.3    +      -       -      +
     74A  MET*     3.0    13.3    +      -       -      +
     75A  ALA*     2.9    26.3    +      -       -      +
    101A  PHE*     4.0     8.1    -      -       +      -
    104A  ILE*     3.9    35.7    -      -       +      -
    107A  VAL*     3.9    28.7    -      -       +      -
    109A  PHE*     4.3     6.5    -      -       +      -
    147A  ALA*     6.2     1.3    -      -       +      -
    149A  ALA*     4.5    10.5    -      -       +      -
    151A  LEU*     4.8     5.8    -      -       +      +
     68B  VAL*     4.4     3.4    -      -       +      -
    104B  ILE*     6.2     0.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 72 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     23A  HIS*     3.7    13.5    +      -       -      -
     27A  MET*     3.7    27.1    -      -       +      +
     29A  LEU*     3.9     6.5    -      -       +      -
     68A  VAL      3.0    14.5    +      -       -      +
     69A  LEU*     3.5    12.3    -      -       -      +
     70A  ILE      3.3     0.2    -      -       -      -
     71A  VAL*     1.3    75.7    -      -       -      +
     73A  GLY*     1.3    56.9    +      -       -      +
     75A  ALA*     3.3     5.7    +      -       -      +
     76A  GLN*     3.0    63.2    +      -       -      +
    101A  PHE*     3.4    22.9    -      -       -      -
     58B  HIS*     4.5     7.3    +      -       -      -
     66B  PRO*     5.3     1.8    -      -       -      +
     67B  GLY      5.6     0.7    +      -       -      -
     68B  VAL*     3.4    18.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 73 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29A  LEU*     4.3    12.6    -      -       -      -
     30A  VAL*     3.8     0.7    -      -       -      +
     69A  LEU      2.9    12.3    +      -       -      -
     70A  ILE      3.2     1.5    +      -       -      -
     71A  VAL      3.1     0.4    -      -       -      -
     72A  GLU*     1.3    75.5    -      -       -      +
     74A  MET*     1.3    63.1    -      -       -      +
     76A  GLN*     3.4     5.7    +      -       -      +
     77A  SER*     3.1    24.8    +      -       -      -
    121A  TYR*     3.4    33.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with MET 74 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     70A  ILE*     3.1    18.9    +      -       -      +
     71A  VAL*     3.0    11.5    +      -       -      +
     73A  GLY*     1.3    74.0    -      -       -      +
     75A  ALA*     1.3    59.3    +      -       -      +
     77A  SER*     3.2     4.3    +      -       -      -
     78A  GLY*     2.9    24.8    +      -       -      -
    121A  TYR*     3.6    18.4    -      -       +      -
    123A  LEU*     3.5    35.3    -      -       +      +
    135A  VAL*     5.4     0.2    -      -       -      +
    137A  GLY      3.6    33.9    -      -       -      +
    138A  THR*     3.7     8.3    -      -       -      +
    139A  ALA*     4.1    18.8    -      -       +      -
    147A  ALA*     5.1     4.3    -      -       -      -
    148A  GLU      4.6     0.2    -      -       -      -
    149A  ALA*     3.6    31.4    -      -       +      +
    151A  LEU*     4.9     5.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 75 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     71A  VAL      2.9     6.3    +      -       -      +
     72A  GLU*     3.5     8.7    -      -       -      +
     74A  MET*     1.3    74.5    -      -       -      +
     76A  GLN*     1.3    55.9    +      -       +      +
     78A  GLY*     3.2     1.8    +      -       -      -
     79A  GLY*     2.7    31.7    +      -       -      -
     99A  VAL*     5.2     4.5    -      -       -      +
    101A  PHE*     3.1    45.1    -      -       +      -
    151A  LEU*     4.2    17.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 76 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     21A  LEU*     3.8    17.0    -      -       +      +
     23A  HIS*     3.3    20.1    -      -       +      +
     27A  MET      2.7    23.7    +      -       -      +
     28A  LEU*     3.8    12.1    -      -       -      +
     29A  LEU*     2.9    31.1    +      -       -      +
     30A  VAL*     3.6    22.7    -      -       +      +
     72A  GLU*     3.0    45.3    +      -       -      +
     73A  GLY      3.7     0.7    -      -       -      +
     74A  MET      3.3     0.2    -      -       -      -
     75A  ALA*     1.3    76.1    -      -       +      +
     77A  SER*     1.3    61.9    +      -       -      +
     79A  GLY*     3.2     2.3    +      -       -      -
     80A  PHE*     2.9    23.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 77 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     30A  VAL*     4.0     7.2    -      -       -      +
     42A  ILE*     3.7    20.6    -      -       -      +
     44A  ALA*     3.9    10.4    -      -       -      +
     73A  GLY      3.1    14.6    +      -       -      -
     74A  MET      3.2     9.2    +      -       -      -
     76A  GLN*     1.3    74.0    -      -       -      +
     78A  GLY*     1.3    65.8    +      -       -      +
     80A  PHE*     3.1     9.3    +      -       -      +
     81A  LEU*     3.0    21.3    +      -       -      +
    121A  TYR*     3.2    23.3    -      -       -      +
    123A  LEU*     4.0    15.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 78 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     74A  MET      2.9    14.0    +      -       -      -
     75A  ALA      3.6     2.9    -      -       -      -
     77A  SER*     1.3    76.6    -      -       -      +
     79A  GLY*     1.3    56.9    +      -       -      +
     81A  LEU*     3.2     9.2    +      -       -      +
     82A  ALA*     2.8    30.8    +      -       -      +
    123A  LEU*     4.2    12.7    -      -       -      +
    133A  TRP*     5.8     0.2    -      -       -      -
    135A  VAL*     4.6    22.8    -      -       -      +
    151A  LEU*     6.0     0.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 79 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     21A  LEU*     4.6     6.1    -      -       -      -
     75A  ALA      2.7    15.3    +      -       -      -
     76A  GLN*     3.6     4.7    -      -       -      -
     77A  SER      3.1     0.4    -      -       -      -
     78A  GLY*     1.3    77.6    -      -       -      +
     80A  PHE*     1.3    61.1    +      -       -      +
     82A  ALA*     3.2     4.6    +      -       -      +
     83A  PHE*     3.0    25.7    +      -       -      +
     99A  VAL*     4.0    31.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 80 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     12A  PHE*     3.9    36.1    -      +       -      -
     16A  HIS      4.4     0.2    -      -       -      -
     17A  ILE*     4.2    17.0    -      -       +      -
     20A  ILE*     3.5    43.9    -      -       +      +
     21A  LEU*     4.1    19.4    -      -       +      +
     33A  ILE*     3.4    33.2    -      -       +      -
     36A  LEU*     4.6     2.5    -      -       +      -
     42A  ILE*     4.1     9.6    -      -       +      -
     76A  GLN      2.9    12.6    +      -       -      +
     77A  SER*     3.4    10.1    -      -       -      +
     79A  GLY*     1.3    74.7    -      -       -      +
     81A  LEU*     1.3    59.9    +      -       -      +
     83A  PHE*     4.0     1.1    -      -       -      +
     84A  THR*     2.9    57.2    +      -       +      -
     89A  PHE*     4.7     0.2    -      +       -      -
----------------------------------------------------------
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Residues in contact with LEU 81 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     36A  LEU*     3.3    30.5    -      -       +      -
     37A  GLN      3.6    12.1    -      -       -      +
     39A  ASN      4.4     0.7    -      -       -      +
     41A  LYS*     3.5    36.6    -      -       -      +
     42A  ILE*     3.7    14.4    -      -       +      -
     77A  SER      3.0    12.6    +      -       -      +
     78A  GLY*     3.4    11.4    -      -       -      +
     80A  PHE*     1.3    78.3    -      -       -      +
     82A  ALA*     1.3    50.7    +      -       -      +
     84A  THR*     4.4     0.2    -      -       -      -
     85A  SER*     2.7    53.8    +      -       -      +
    123A  LEU*     4.4     5.2    -      -       +      +
    124A  GLU      5.2     0.2    -      -       -      -
    125A  VAL*     3.7    23.6    -      -       +      +
    133A  TRP*     5.1     0.9    -      -       +      -
    135A  VAL*     5.3     3.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 82 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     78A  GLY      2.8    20.5    +      -       -      +
     79A  GLY*     3.5     7.4    -      -       -      +
     81A  LEU*     1.3    76.7    -      -       -      +
     83A  PHE*     1.3    65.2    +      -       -      +
     85A  SER*     3.2     7.6    +      -       -      -
     86A  LEU*     3.2    18.2    +      -       -      +
     99A  VAL*     5.2     2.5    -      -       +      -
    133A  TRP*     3.7    43.6    -      -       +      -
    135A  VAL*     6.3     0.2    -      -       +      -
    153A  ALA*     6.3     1.8    -      -       +      -
    155A  ILE*     4.0    15.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 83 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     20A  ILE*     4.0    24.9    -      -       +      -
     79A  GLY      3.0    14.1    +      -       -      +
     80A  PHE      4.0     1.6    -      -       -      +
     82A  ALA*     1.3    78.3    -      -       -      +
     84A  THR*     1.3    57.1    +      -       -      +
     86A  LEU      3.0     3.3    +      -       -      -
     87A  TRP*     2.8    79.1    +      +       +      -
     88A  GLY      3.6    21.1    -      -       -      -
     90A  ASP      3.5    14.6    -      -       -      -
     93A  ILE*     3.8    15.9    -      -       +      -
     94A  ALA*     3.2    42.8    -      -       +      -
     97A  LYS*     4.3    12.8    -      -       +      -
     99A  VAL*     5.4     5.4    -      -       +      -
    155A  ILE*     4.2     5.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with THR 84 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8A  LEU*     3.2    34.3    -      -       +      +
     12A  PHE*     5.0     0.5    -      -       -      -
     20A  ILE*     4.9     2.3    -      -       -      +
     36A  LEU*     3.6    22.9    -      -       +      -
     80A  PHE*     2.9    38.9    +      -       +      +
     81A  LEU      3.8     4.7    -      -       -      +
     83A  PHE*     1.3    78.3    -      -       -      +
     85A  SER*     1.3    63.7    +      -       -      +
     88A  GLY*     2.8    44.1    +      -       -      -
     89A  PHE*     4.6     2.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 85 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     38A  ALA*     3.5    12.8    -      -       -      +
     39A  ASN*     2.8    54.9    +      -       -      +
     81A  LEU*     2.7    35.6    +      -       -      +
     82A  ALA      3.2     0.6    +      -       -      -
     84A  THR*     1.3    76.0    -      -       -      +
     86A  LEU*     1.3    60.8    +      -       -      +
     88A  GLY      4.9     0.2    +      -       -      -
    133A  TRP*     3.4    11.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 86 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     39A  ASN*     5.4     2.5    -      -       -      +
     82A  ALA      3.2     6.0    +      -       -      +
     83A  PHE      3.0     6.8    +      -       -      +
     85A  SER*     1.3    82.1    -      -       -      +
     87A  TRP*     1.3    84.2    +      -       +      +
    128A  HIS*     5.7     2.5    -      -       +      +
    130A  GLY*     3.9    13.5    -      -       -      +
    131A  MET*     3.9    14.1    -      -       +      -
    133A  TRP*     3.7    25.8    -      -       +      +
    155A  ILE*     3.4    33.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with TRP 87 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     83A  PHE*     2.8    69.9    +      +       +      +
     86A  LEU*     1.3    96.6    -      -       +      +
     88A  GLY*     1.3    65.0    +      -       -      +
     89A  PHE      3.9     0.2    +      -       -      -
     90A  ASP*     3.8    16.5    -      -       +      +
     93A  ILE*     3.7    31.7    -      -       +      +
     97A  LYS*     3.8    25.1    -      -       +      -
    131A  MET*     3.7    35.9    -      -       +      -
    155A  ILE*     4.0    11.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 88 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8A  LEU*     4.3    12.6    -      -       -      -
     83A  PHE*     3.6    14.9    -      -       -      -
     84A  THR*     2.8    32.4    +      -       -      -
     85A  SER      4.7     0.2    -      -       -      -
     86A  LEU      3.6     0.6    -      -       -      -
     87A  TRP*     1.3    82.6    -      -       -      +
     89A  PHE*     1.3    57.9    +      -       -      -
     90A  ASP      2.9     8.0    +      -       -      -
----------------------------------------------------------
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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