Contacts of the helix formed by residues 50 - 73 (chain B) in PDB entry 1O0W


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 ASN 50 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     28B  ARG*     3.1    22.9    +      -       -      +
     29B  ALA*     3.0    22.3    +      -       -      +
     30B  LEU      4.6     0.6    -      -       -      -
     31B  CYS      2.7    22.4    +      -       -      +
     32B  HIS*     4.5    11.9    -      -       -      +
     33B  SER      5.0     1.0    +      -       -      -
     49B  SER*     1.3    72.3    -      -       -      +
     51B  GLU*     1.3    67.6    +      -       -      +
     52B  LYS      3.4     2.5    -      -       -      -
     53B  LEU*     3.4     4.5    +      -       -      -
     54B  GLU*     2.8    31.4    +      -       -      +
    107B  LEU*     5.6     0.6    -      -       -      +
    124B  ILE*     5.3     1.8    +      -       -      +
    127B  ASP*     4.5     8.9    -      -       -      +
    128B  ALA*     3.7    22.4    -      -       -      +
    131B  ALA*     3.7    10.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 51 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     78A  VAL*     4.0    28.1    -      -       +      +
     33B  SER*     4.0    18.5    -      -       -      -
     49B  SER*     2.8    27.4    +      -       -      +
     50B  ASN*     1.3    84.6    +      -       -      +
     52B  LYS*     1.3    62.8    +      -       +      +
     54B  GLU*     3.4    11.8    +      -       -      +
     55B  PHE*     3.1    20.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 52 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     70A  TYR*     3.5    25.8    -      -       +      -
     73A  TYR      5.1     1.8    -      -       -      +
     74A  PRO*     2.5    32.9    +      -       +      +
     75A  GLU*     4.2     4.6    +      -       -      +
     76A  ALA      3.1    26.4    +      -       -      -
     77A  GLU*     5.2     0.4    -      -       -      +
     78A  VAL*     4.9    10.1    -      -       +      +
     81A  LEU*     4.2    15.9    -      -       +      -
     48B  GLU*     3.4    30.7    +      -       -      +
     49B  SER      4.6     2.4    +      -       -      +
     50B  ASN      3.4     0.6    -      -       -      -
     51B  GLU*     1.3    74.8    -      -       +      +
     53B  LEU*     1.3    66.6    +      -       +      +
     55B  PHE*     3.1    10.2    +      -       -      +
     56B  LEU      3.1    17.5    +      -       -      -
----------------------------------------------------------
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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
----------------------------------------------------------
     70A  TYR*     3.3    31.9    -      -       +      +
     25B  LEU*     3.6    19.1    -      -       +      +
     28B  ARG*     3.7    20.6    -      -       +      -
     29B  ALA*     3.5    34.8    -      -       +      +
     49B  SER      5.4     0.4    +      -       -      -
     50B  ASN*     3.4     7.7    +      -       -      +
     51B  GLU      3.4     0.4    -      -       -      -
     52B  LYS*     1.3    78.7    -      -       +      +
     54B  GLU*     1.3    51.9    +      -       -      +
     56B  LEU      3.2     0.3    +      -       -      -
     57B  GLY*     2.6    32.2    +      -       -      -
    131B  ALA*     3.9    13.2    -      -       +      +
    134B  ALA*     3.0    26.1    -      -       +      +
    135B  ALA*     4.0     8.7    -      -       +      +
    138B  LEU*     3.9    11.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 54 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     50B  ASN*     2.8    21.1    +      -       -      +
     51B  GLU*     3.6    11.9    -      -       -      +
     52B  LYS      3.1     0.2    -      -       -      -
     53B  LEU*     1.3    79.3    -      -       -      +
     55B  PHE*     1.3    58.2    +      -       -      +
     58B  ASP*     2.9    32.4    +      -       -      +
    127B  ASP*     3.3    56.2    -      -       -      +
    130B  GLU*     3.7    21.2    -      -       +      +
    131B  ALA*     3.8     8.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 55 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     62A  GLU*     5.6     0.2    -      -       -      +
     66A  CYS*     3.6    55.2    -      -       +      -
     69A  LEU*     3.8    20.0    -      -       +      -
     70A  TYR*     4.4     4.3    -      -       +      -
     78A  VAL*     4.2    16.4    -      -       +      -
     81A  LEU*     3.7    52.0    -      -       +      -
     82A  ALA*     4.0    11.2    -      -       +      -
     85A  LYS*     4.3     7.4    -      -       +      -
     51B  GLU      3.1    12.9    +      -       -      +
     52B  LYS*     3.1    11.6    +      -       -      +
     54B  GLU*     1.3    78.5    -      -       -      +
     56B  LEU*     1.3    69.7    +      -       +      +
     58B  ASP*     3.7     9.0    +      -       -      +
     59B  ALA      3.9     5.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 56 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63A  LEU*     4.0    17.7    -      -       +      -
     66A  CYS*     4.1     6.3    -      -       +      +
     67A  GLU*     3.8    33.9    -      -       +      +
     70A  TYR*     3.9    22.7    -      -       +      -
     52B  LYS      3.1    11.5    +      -       -      +
     53B  LEU      3.7     4.9    -      -       -      +
     55B  PHE*     1.3    79.4    -      -       -      +
     57B  GLY*     1.3    66.8    +      -       -      +
     59B  ALA*     3.0    13.5    +      -       -      +
     60B  VAL*     3.0    15.3    +      -       +      +
    134B  ALA*     4.0     9.4    -      -       +      -
    137B  TYR*     4.4     7.2    -      -       +      -
    138B  LEU*     3.8    40.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 57 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     53B  LEU      2.6    16.3    +      -       -      -
     54B  GLU      3.7     1.1    -      -       -      -
     56B  LEU*     1.3    75.0    -      -       -      +
     58B  ASP*     1.3    56.4    +      -       -      +
     60B  VAL*     3.5     5.0    -      -       -      +
     61B  LEU*     2.9    30.5    +      -       -      +
    130B  GLU*     3.1    30.5    -      -       -      +
    133B  LEU*     4.5     3.0    -      -       -      +
    134B  ALA*     3.4    12.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 58 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     62A  GLU*     3.5    14.2    -      -       -      +
     85A  LYS*     5.4     3.1    +      -       -      -
     54B  GLU*     2.9    17.4    +      -       -      +
     55B  PHE*     3.9     7.9    -      -       -      +
     56B  LEU      3.1     0.2    -      -       -      -
     57B  GLY*     1.3    77.8    -      -       -      +
     59B  ALA*     1.3    56.3    +      -       -      +
     61B  LEU*     3.4     3.9    +      -       -      +
     62B  GLU*     2.9    51.3    +      -       -      +
     89B  ALA      5.7     0.7    -      -       -      +
    130B  GLU*     3.0    30.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 59 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     59A  ALA      4.8     1.2    -      -       -      +
     62A  GLU*     3.4    29.4    +      -       +      +
     63A  LEU*     3.7    31.6    -      -       +      +
     66A  CYS*     3.9    16.4    -      -       +      -
     55B  PHE      3.9     0.8    +      -       -      -
     56B  LEU      3.0    10.3    +      -       -      +
     58B  ASP*     1.3    75.1    -      -       -      +
     60B  VAL*     1.3    65.6    -      -       -      +
     62B  GLU*     3.4     2.0    +      -       -      +
     63B  LEU*     3.1    23.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 60 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63A  LEU*     3.9    19.5    -      -       +      -
     56B  LEU*     3.0    23.5    +      -       +      +
     57B  GLY*     3.2    11.0    +      -       -      +
     59B  ALA*     1.3    78.3    -      -       -      +
     61B  LEU*     1.3    57.8    +      -       -      +
     63B  LEU*     3.3     2.6    +      -       -      +
     64B  PHE*     2.9    27.8    +      -       +      +
    133B  LEU*     4.5    15.7    -      -       +      +
    134B  ALA*     4.6     1.3    -      -       -      -
    137B  TYR*     3.8    48.5    -      -       +      -
    142B  TYR*     4.6    10.5    -      -       +      -
    145B  ILE*     4.7    14.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 61 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     57B  GLY      2.9    16.6    +      -       -      +
     58B  ASP*     3.6     4.9    -      -       -      +
     60B  VAL*     1.3    77.7    -      -       -      +
     62B  GLU*     1.3    62.7    +      -       -      +
     64B  PHE*     3.2    11.8    +      -       +      +
     65B  VAL*     2.9    44.5    +      -       +      +
     89B  ALA*     3.7    26.5    -      -       +      +
     94B  LEU*     3.6    33.7    -      -       +      -
    130B  GLU*     4.5    11.2    -      -       +      -
    133B  LEU*     3.8    24.8    -      -       +      +
    153B  PHE*     4.1    21.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 62 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     59A  ALA*     4.1     8.3    -      -       +      -
     62A  GLU*     3.5    31.2    -      -       -      +
     58B  ASP*     2.9    45.4    +      -       -      +
     59B  ALA      3.8     3.1    -      -       -      +
     60B  VAL      3.3     0.2    -      -       -      -
     61B  LEU*     1.3    77.3    -      -       -      +
     63B  LEU*     1.3    58.7    +      -       -      +
     65B  VAL*     4.1     3.5    -      -       -      +
     66B  CYS*     2.9    37.5    +      -       -      -
     85B  LYS*     3.8    29.8    +      -       +      +
     89B  ALA*     3.6    24.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 63 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     56A  LEU*     3.7    26.2    -      -       +      -
     59A  ALA*     3.8    18.3    -      -       +      +
     60A  VAL*     3.8    22.7    -      -       +      +
     63A  LEU*     3.4    32.1    -      -       +      -
    137A  TYR*     3.8    31.2    -      -       +      +
    142A  TYR*     5.1     2.9    -      -       +      -
     59B  ALA      3.1    16.9    +      -       -      +
     60B  VAL      3.8     3.6    -      -       -      +
     62B  GLU*     1.3    73.4    -      -       -      +
     64B  PHE*     1.3    60.6    +      -       -      +
     67B  GLU*     2.8    31.3    +      -       -      +
    142B  TYR*     3.9    13.2    -      -       +      +
----------------------------------------------------------
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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  VAL*     2.9    18.6    +      -       +      +
     61B  LEU*     3.5    13.2    -      -       +      +
     63B  LEU*     1.3    77.8    -      -       -      +
     65B  VAL*     1.3    72.7    +      -       +      +
     67B  GLU*     3.6     1.9    +      -       -      +
     68B  ILE*     3.2    37.1    +      -       +      +
    133B  LEU*     5.9     2.7    -      -       +      -
    142B  TYR*     3.4    20.3    +      +       +      +
    145B  ILE*     3.9    21.5    -      -       +      -
    146B  LYS*     3.9    25.1    -      -       +      -
    149B  PHE*     3.4    11.9    -      -       +      -
    150B  GLU*     3.4    40.2    -      -       +      -
    153B  PHE*     3.5    33.9    -      +       +      -
----------------------------------------------------------
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Residues in contact with VAL 65 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     61B  LEU*     2.9    39.2    +      -       +      +
     62B  GLU*     4.1     3.8    -      -       -      +
     64B  PHE*     1.3    80.2    -      -       +      +
     66B  CYS*     1.3    66.1    +      -       -      +
     68B  ILE*     3.2     3.7    +      -       -      +
     69B  LEU*     2.9    38.4    +      -       +      +
     85B  LYS*     4.2    13.7    -      -       +      +
     88B  ALA*     3.7    30.7    -      -       +      -
     89B  ALA*     4.9     2.9    -      -       +      +
    153B  PHE*     4.3    14.8    -      -       +      -
    157B  ILE*     4.0    13.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with CYS 66 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     55A  PHE*     3.5    33.3    -      -       +      -
     56A  LEU*     4.0    10.1    -      -       +      -
     59A  ALA*     3.8    24.0    -      -       +      -
     62B  GLU*     2.9    25.9    +      -       -      +
     63B  LEU      4.0     1.1    -      -       -      +
     65B  VAL*     1.3    76.6    -      -       -      +
     67B  GLU*     1.3    56.7    +      -       -      +
     69B  LEU*     3.6     1.8    -      -       -      +
     70B  TYR*     2.8    32.1    +      -       -      +
     85B  LYS*     3.5    31.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 67 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     56A  LEU*     3.8    16.7    -      -       +      +
    137A  TYR*     2.7    34.4    +      -       +      -
     63B  LEU*     2.8    20.0    +      -       +      +
     64B  PHE      3.8     4.0    -      -       -      +
     66B  CYS*     1.3    72.8    -      -       -      +
     68B  ILE*     1.3    63.6    +      -       +      +
     70B  TYR*     3.8     1.9    -      -       -      +
     71B  LYS*     2.9    63.6    +      -       +      +
    142B  TYR*     2.5    31.2    +      -       -      +
    146B  LYS*     4.0    15.1    +      -       +      -
----------------------------------------------------------
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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*     3.2    45.9    +      -       +      +
     65B  VAL      3.2     7.0    +      -       -      +
     67B  GLU*     1.3    80.7    -      -       +      +
     69B  LEU*     1.3    58.6    +      -       -      +
     71B  LYS*     4.9     1.8    -      -       -      -
     72B  LYS*     2.9    44.5    +      -       +      +
     73B  TYR*     5.1     0.4    -      -       +      -
    150B  GLU*     4.2    27.4    -      -       +      +
    153B  PHE*     4.1     7.2    -      -       +      -
    154B  GLU*     3.9    22.9    -      -       +      +
    157B  ILE*     3.9    33.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 69 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     55A  PHE*     3.8    17.9    -      -       +      -
     65B  VAL*     2.9    29.2    +      -       +      +
     66B  CYS      3.2     4.7    +      -       -      +
     68B  ILE*     1.3    78.2    -      -       -      +
     70B  TYR*     1.3    61.4    +      -       -      +
     73B  TYR*     3.1    39.6    +      -       +      +
     81B  LEU*     3.5    34.3    -      -       +      +
     84B  VAL*     3.6    16.2    -      -       +      -
     85B  LYS*     3.7    21.3    -      -       +      +
    157B  ILE*     3.5    28.7    -      -       +      -
    161B  MET*     4.2     7.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 70 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     25A  LEU*     4.5     3.3    -      -       -      +
     28A  ARG*     3.9    15.1    +      -       -      -
     52A  LYS*     3.5    47.3    -      -       +      +
     53A  LEU*     3.1    26.0    -      -       +      +
     55A  PHE*     4.5     7.6    -      +       +      -
     56A  LEU*     3.8    25.1    -      -       +      -
    138A  LEU*     3.3    24.6    -      -       +      +
     66B  CYS      2.8    16.9    +      -       -      +
     67B  GLU      3.8     3.1    -      -       -      +
     69B  LEU*     1.3    79.1    -      -       -      +
     71B  LYS*     1.3    73.4    -      -       +      +
     73B  TYR      4.3     0.6    -      -       -      -
     74B  PRO*     4.1    17.8    -      -       -      +
     81B  LEU*     5.1     4.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 71 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    138A  LEU*     3.9    21.5    -      -       -      +
     67B  GLU*     2.9    52.4    +      -       +      +
     68B  ILE*     4.1     2.0    -      -       -      +
     70B  TYR*     1.3    89.3    -      -       +      +
     72B  LYS*     1.3    64.8    +      -       +      +
     74B  PRO*     3.9     8.0    -      -       -      +
    146B  LYS*     4.7     7.9    -      -       -      +
    150B  GLU*     6.2     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 72 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     68B  ILE*     2.9    33.8    +      -       +      +
     71B  LYS*     1.3    76.7    -      -       +      +
     73B  TYR*     1.3    85.6    +      -       +      +
     74B  PRO*     3.3    10.5    -      -       -      +
    154B  GLU*     3.6    33.8    +      -       +      +
    218B  ARG*     5.7     3.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 73 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     52A  LYS*     4.4     2.4    -      -       -      -
     68B  ILE*     4.8     1.8    -      -       +      -
     69B  LEU*     3.1    35.5    +      -       +      +
     70B  TYR      4.3     0.8    -      -       -      +
     72B  LYS*     1.3   101.4    -      -       +      +
     74B  PRO*     1.3    64.1    -      -       -      +
     75B  GLU      3.1     5.0    +      -       -      +
     76B  ALA*     3.1    29.6    +      -       +      +
     81B  LEU*     4.1     3.9    -      -       +      +
    154B  GLU      4.4     1.9    +      -       -      -
    157B  ILE*     3.5    23.8    -      -       +      +
    158B  GLU*     2.4    50.5    +      -       -      +
    161B  MET*     3.7    31.0    -      -       +      -
----------------------------------------------------------
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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