Contacts of the helix formed by residues 52 - 75 (chain B) in PDB entry 5TWF


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 ASP 52 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     47B  LEU*     3.9     0.2    -      -       -      +
     51B  GLU*     1.3    87.3    +      -       -      +
     53B  LEU*     1.3    81.7    +      -       -      +
     54B  ASN*     3.1    21.2    +      -       -      +
     55B  GLU*     3.4    24.7    +      -       +      +
     56B  TRP*     3.1    18.2    +      -       -      +
    140B  PHE*     4.9     6.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 53 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     47B  LEU*     3.7    25.4    -      -       +      -
     51B  GLU      3.4     3.8    +      -       -      -
     52B  ASP*     1.3    74.7    +      -       -      +
     54B  ASN*     1.3    65.4    +      -       -      +
     56B  TRP*     3.0     3.5    +      -       +      +
     57B  ILE*     2.9    38.5    +      -       +      +
    145B  MET*     4.8    12.8    -      -       +      -
    193B  PHE*     3.3    42.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 54 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     52B  ASP*     3.1    11.3    +      -       -      +
     53B  LEU*     1.3    78.2    -      -       -      +
     55B  GLU*     1.3    56.8    +      -       -      +
     57B  ILE*     3.4     3.4    +      -       -      -
     58B  ALA*     2.9    29.3    +      -       -      +
    140B  PHE*     3.6    36.8    +      -       +      +
    141B  PRO      5.0     1.4    +      -       -      -
    144B  PHE*     3.3    35.2    -      -       +      +
    145B  MET*     3.3    22.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 55 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     24B  HIS*     3.7    20.5    +      -       -      +
     25B  GLN*     2.6    30.9    -      -       -      +
     28B  LEU*     4.3     7.6    -      -       +      -
     51B  GLU*     2.6    31.1    -      -       -      +
     52B  ASP*     3.4    22.1    +      -       +      +
     53B  LEU      3.1     0.8    -      -       -      -
     54B  ASN*     1.3    76.1    -      -       -      +
     56B  TRP*     1.3    65.3    +      -       -      +
     58B  ALA*     3.1     2.7    +      -       -      +
     59B  VAL*     2.9    30.7    +      -       -      +
    140B  PHE*     3.8    20.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with TRP 56 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     28B  LEU*     3.7    46.3    -      -       +      +
     31B  HIS*     5.0     3.6    -      -       +      -
     32B  ALA*     3.5    25.8    -      -       +      -
     35B  THR*     5.6     0.7    -      -       -      -
     44B  ALA      4.1    13.0    -      -       -      -
     45B  VAL*     2.9    23.9    +      -       -      -
     46B  MET      3.9    10.9    +      -       -      -
     47B  LEU*     3.7    21.8    -      -       +      -
     48B  PRO*     3.9    21.1    -      -       +      -
     51B  GLU*     5.1     0.9    -      -       +      -
     52B  ASP      3.1     2.6    +      -       -      +
     53B  LEU*     3.0     9.7    +      -       +      +
     55B  GLU*     1.3    78.8    -      -       -      +
     57B  ILE*     1.3    63.0    +      -       -      +
     59B  VAL*     4.0     2.1    -      -       +      -
     60B  ASN*     3.0    51.8    +      -       -      +
    189B  PHE*     3.2    23.8    -      +       -      -
    193B  PHE*     3.5    21.3    -      +       -      -
----------------------------------------------------------
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Residues in contact with ILE 57 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     53B  LEU*     2.9    21.4    +      -       +      +
     54B  ASN*     3.8     6.1    -      -       -      +
     56B  TRP*     1.3    75.7    -      -       +      +
     58B  ALA*     1.3    54.1    +      -       -      +
     60B  ASN*     4.3     0.2    -      -       -      +
     61B  THR*     2.3    49.9    +      -       -      +
    144B  PHE*     4.6     3.6    -      -       +      -
    145B  MET*     4.2    19.1    -      -       +      -
    148B  ALA*     3.7    24.0    -      -       +      -
    152B  LEU*     4.7     0.2    -      -       +      -
    189B  PHE*     3.4    26.6    -      -       +      -
    193B  PHE*     3.8    29.2    -      -       +      -
    195B  LEU*     3.7    21.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 58 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     25B  GLN*     4.9     7.4    -      -       -      +
     54B  ASN      2.9    17.6    +      -       -      +
     55B  GLU*     3.1     5.1    +      -       -      +
     57B  ILE*     1.3    76.8    -      -       -      +
     59B  VAL*     1.3    63.7    +      -       -      +
     61B  THR*     3.5     2.3    -      -       -      -
     62B  VAL*     3.0    29.3    +      -       -      +
    132B  PHE*     3.8    25.9    -      -       +      -
    140B  PHE*     3.7    23.8    -      -       +      -
    144B  PHE*     3.9     5.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 59 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     25B  GLN*     3.7    41.5    -      -       +      +
     28B  LEU*     4.2    15.9    -      -       +      +
     29B  LEU*     3.5    46.1    -      -       +      +
     55B  GLU      2.9    20.3    +      -       -      +
     56B  TRP*     4.0     4.3    -      -       +      +
     58B  ALA*     1.3    75.4    -      -       -      +
     60B  ASN*     1.3    67.4    +      -       -      +
     62B  VAL*     3.1     9.4    +      -       -      +
     63B  ASP*     3.1    21.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 60 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29B  LEU*     6.2     0.2    -      -       -      -
     32B  ALA*     3.7    23.0    -      -       -      +
     45B  VAL*     6.0     0.2    -      -       -      +
     56B  TRP*     3.0    46.5    +      -       -      +
     59B  VAL*     1.3    78.3    -      -       -      +
     61B  THR*     1.3    57.5    +      -       -      +
     63B  ASP*     3.8     5.5    -      -       -      +
     64B  PHE*     2.9    40.0    +      -       +      -
    185B  HIS*     3.8    24.7    +      -       -      -
    189B  PHE*     3.5    38.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 61 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     57B  ILE*     2.3    43.0    +      -       -      +
     58B  ALA*     3.5     6.7    -      -       -      -
     60B  ASN*     1.3    77.8    -      -       -      +
     62B  VAL*     1.3    57.8    +      -       -      +
     64B  PHE*     3.3    10.1    +      -       -      +
     65B  PHE*     2.9    28.0    +      -       +      +
    122B  VAL*     5.8     0.2    -      -       +      -
    126B  LEU*     5.2     2.9    -      -       +      -
    132B  PHE*     4.6    17.3    -      -       +      -
    148B  ALA*     4.5     5.4    -      -       +      +
    151B  ILE*     4.1    28.5    -      -       +      -
    152B  LEU*     4.0    20.9    -      -       +      +
    155B  LEU*     4.6     0.9    -      -       -      +
    189B  PHE*     5.1     0.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 62 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29B  LEU*     6.5     0.7    -      -       +      -
     58B  ALA      3.0    17.2    +      -       -      +
     59B  VAL*     3.1     8.7    +      -       -      +
     61B  THR*     1.3    74.4    -      -       -      +
     63B  ASP*     1.3    58.8    +      -       -      +
     65B  PHE*     3.1     8.9    +      -       -      +
     66B  ASN*     2.9    42.3    +      -       -      +
    126B  LEU*     3.9    35.2    -      -       +      -
    132B  PHE*     4.6     7.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 63 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29B  LEU*     3.6    33.5    -      -       +      +
     33B  GLU*     3.8    19.7    -      -       -      +
     59B  VAL      3.1    11.2    +      -       -      +
     60B  ASN*     4.0     7.0    -      -       -      +
     62B  VAL*     1.3    73.6    -      -       -      +
     64B  PHE*     1.3    63.7    +      -       +      +
     66B  ASN*     4.2    15.7    +      -       -      +
     67B  GLN*     2.8    47.5    +      -       -      +
    185B  HIS*     5.9     4.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 64 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     60B  ASN*     2.9    29.2    +      -       +      +
     61B  THR*     3.6     5.2    -      -       -      +
     63B  ASP*     1.3    78.8    -      -       +      +
     65B  PHE*     1.3    56.4    +      -       -      +
     67B  GLN*     3.2     3.9    +      -       +      -
     68B  ILE*     2.8    39.6    +      -       +      +
    152B  LEU*     4.0    13.0    -      -       +      -
    155B  LEU*     4.0     7.6    -      -       +      -
    159B  TYR*     5.0     3.1    -      -       -      -
    182B  SER*     4.5     6.7    -      -       -      -
    185B  HIS*     3.6    38.6    -      +       +      -
    186B  PHE*     3.5    57.9    -      +       +      -
    189B  PHE*     3.6    34.1    -      +       +      -
    190B  VAL*     5.2     0.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 65 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     61B  THR      2.9    13.7    +      -       -      +
     62B  VAL*     3.3    10.3    -      -       -      +
     64B  PHE*     1.3    76.1    -      -       -      +
     66B  ASN*     1.3    74.7    +      -       -      +
     68B  ILE*     4.0     0.9    -      -       -      +
     69B  ASN*     3.0    45.1    +      -       -      +
    119B  MET*     3.4    53.6    -      -       +      -
    122B  VAL*     3.4    26.2    -      -       +      -
    123B  GLN*     4.1    26.7    -      -       +      -
    126B  LEU*     3.7    24.2    -      -       +      -
    155B  LEU*     3.6    18.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 66 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     62B  VAL*     2.9    34.4    +      -       -      +
     63B  ASP*     3.7    18.0    +      -       -      +
     64B  PHE      3.3     0.2    -      -       -      -
     65B  PHE*     1.3    87.1    -      -       -      +
     67B  GLN*     1.3    58.7    +      -       -      +
     69B  ASN*     3.6     5.2    -      -       -      +
     70B  MET*     3.0    35.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 67 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63B  ASP*     2.8    32.4    +      -       -      +
     64B  PHE*     3.8     6.1    -      -       +      +
     66B  ASN*     1.3    75.2    -      -       -      +
     68B  ILE*     1.3    61.9    +      -       +      +
     70B  MET*     4.2     4.0    -      -       -      +
     71B  LEU*     2.9    34.6    +      -       -      +
    178B  HIS*     2.8    35.1    +      -       -      +
    182B  SER*     3.3    28.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 68 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     64B  PHE*     2.8    27.1    +      -       +      +
     65B  PHE      4.0     2.5    -      -       -      +
     67B  GLN*     1.3    75.7    -      -       +      +
     69B  ASN*     1.3    65.9    +      -       -      +
     71B  LEU*     3.3     4.7    +      -       +      +
     72B  TYR*     2.8    24.9    +      -       -      +
    119B  MET*     4.5     5.2    -      -       +      -
    155B  LEU*     4.1    22.7    -      -       +      +
    158B  VAL*     3.5    40.4    -      -       +      -
    159B  TYR*     3.1    55.6    -      -       +      +
    162B  ILE*     6.0     1.6    -      -       +      -
    182B  SER*     4.7     1.1    -      -       -      +
    186B  PHE*     5.2     1.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 69 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65B  PHE*     3.0    35.8    +      -       +      +
     66B  ASN*     3.6     6.7    -      -       -      +
     67B  GLN      3.3     0.2    -      -       -      -
     68B  ILE*     1.3    78.2    -      -       -      +
     70B  MET*     1.3    66.4    +      -       +      +
     72B  TYR*     3.8     5.0    -      -       -      +
     73B  GLY*     2.9    26.9    +      -       -      -
    119B  MET*     3.4    31.4    -      -       +      +
    123B  GLN*     5.7     1.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with MET 70 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     66B  ASN*     3.0    21.0    +      -       +      +
     67B  GLN*     4.2     4.3    -      -       -      +
     69B  ASN*     1.3    84.0    -      -       +      +
     71B  LEU*     1.3    64.8    +      -       -      +
     73B  GLY*     3.4     9.8    +      -       -      +
     74B  THR*     3.5    16.5    +      -       -      +
    178B  HIS*     5.4     7.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 71 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     67B  GLN      2.9    20.8    +      -       -      +
     68B  ILE*     3.6     5.4    -      -       -      +
     70B  MET*     1.3    77.8    -      -       -      +
     72B  TYR*     1.3    58.9    +      -       -      +
     74B  THR*     2.3    36.6    +      -       +      +
     75B  ILE*     4.0     2.6    +      -       -      +
    159B  TYR*     4.5    10.1    -      -       +      -
    162B  ILE*     4.6     5.8    -      -       +      +
    170B  VAL*     5.9     3.3    -      -       +      +
    175B  GLU*     5.3     7.6    -      -       +      +
    178B  HIS*     3.4    40.8    -      -       +      +
    179B  LEU*     3.5    52.5    -      -       +      +
    182B  SER*     3.9    16.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 72 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     68B  ILE      2.8    20.4    +      -       -      +
     69B  ASN*     3.8     5.8    -      -       -      +
     71B  LEU*     1.3    73.3    -      -       -      +
     73B  GLY*     1.3    64.9    +      -       -      +
     74B  THR      3.0     1.2    +      -       -      -
     75B  ILE*     3.0    21.0    +      -       +      +
     76B  THR*     3.1    27.8    +      -       +      -
     79B  CYS*     2.8    42.1    -      -       +      +
    112B  PRO*     3.8    16.7    -      -       +      +
    115B  ILE*     3.8    32.6    -      -       +      +
    119B  MET*     6.1     1.6    -      -       +      -
    158B  VAL*     3.9    25.4    -      -       +      -
    161B  HIS*     4.5     9.9    -      +       -      -
    162B  ILE*     4.0    20.3    -      -       +      +
    166B  HIS*     5.7     0.2    -      +       -      -
----------------------------------------------------------
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Residues in contact with GLY 73 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     69B  ASN*     2.9    16.1    +      -       -      -
     70B  MET*     3.4     5.8    +      -       -      -
     71B  LEU      3.2     1.0    -      -       -      -
     72B  TYR*     1.3    78.3    -      -       -      +
     74B  THR*     1.3    57.7    +      -       -      +
     76B  THR*     2.4    38.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 74 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     70B  MET      3.5    14.8    -      -       -      +
     71B  LEU*     2.3    31.5    +      -       +      +
     73B  GLY*     1.3    79.6    -      -       -      +
     75B  ILE*     1.3    65.8    +      -       -      +
     76B  THR*     3.3     1.7    +      -       -      -
     77B  GLU*     4.7     3.6    +      -       -      +
     78B  PHE*     5.0     2.3    -      -       -      -
    170B  VAL*     5.3     2.4    -      -       -      +
    173B  LEU*     3.7    18.3    -      -       -      +
    175B  GLU*     3.0    34.0    +      -       -      +
    178B  HIS*     6.3     0.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 75 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     71B  LEU      4.5     0.7    -      -       -      +
     72B  TYR*     3.3    22.4    -      -       +      +
     74B  THR*     1.3    81.5    +      -       -      +
     76B  THR*     1.3    65.7    +      -       -      +
     77B  GLU      3.1     3.6    -      -       -      -
     78B  PHE*     2.9    29.6    +      -       +      +
     79B  CYS*     3.1    10.3    +      -       -      +
    161B  HIS*     6.2     0.2    -      -       +      -
    162B  ILE*     3.6    44.2    -      -       +      -
    166B  HIS*     4.1    24.9    -      -       +      +
    169B  SER*     4.5     2.2    -      -       -      -
    170B  VAL*     3.5    28.9    -      -       +      +
    173B  LEU*     4.2    13.7    -      -       +      -
----------------------------------------------------------
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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