Contacts of the helix formed by residues 88 - 111 (chain B) in PDB entry 2C8U


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 THR 88 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     80A  LYS*     4.2     6.4    +      -       -      -
     86B  GLY      4.2     0.5    -      -       -      -
     87B  GLY*     1.3    83.2    +      -       -      +
     89B  GLU*     1.3    59.4    +      -       -      +
     90B  GLU*     2.8    36.6    +      -       -      +
     91B  GLU*     2.9    22.8    +      -       +      +
     92B  TYR*     2.8    27.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 89 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     77A  TYR*     3.3    24.7    -      -       +      +
     80A  LYS*     3.8    36.0    -      -       +      +
     81A  LYS*     3.2    41.7    -      -       +      +
     88B  THR*     1.3    72.8    -      -       -      +
     90B  GLU*     1.3    57.0    +      -       +      +
     92B  TYR*     3.4     3.7    +      -       -      +
     93B  TYR      2.9    23.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 90 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     66A  LYS*     5.8     5.4    -      -       -      +
     77A  TYR*     4.1    12.2    -      -       +      +
     88B  THR*     2.8    32.2    +      -       -      +
     89B  GLU*     1.3    72.3    -      -       +      +
     91B  GLU*     1.3    68.1    +      -       -      +
     93B  TYR*     3.5     4.8    +      -       -      +
     94B  ASN*     2.9    32.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 91 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     86B  GLY*     3.8     6.1    -      -       -      -
     87B  GLY*     2.9    28.8    +      -       -      +
     88B  THR*     2.9    24.0    +      -       -      +
     90B  GLU*     1.3    79.9    -      -       -      +
     92B  TYR*     1.3    60.4    +      -       -      +
     94B  ASN*     3.2     6.0    +      -       -      +
     95B  VAL*     2.8    35.2    +      -       -      +
    147B  THR*     4.6     6.3    +      -       -      +
    152B  VAL*     3.6    22.6    -      -       +      +
    153B  GLY*     4.1    18.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 92 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     76A  ARG*     3.5    48.8    -      -       +      +
     77A  TYR*     4.1     6.5    -      -       -      -
     80A  LYS*     3.5    39.7    -      -       +      +
     85A  MET*     3.5    21.1    -      -       +      +
     92A  TYR*     4.1    14.8    -      +       -      -
     80B  LYS*     6.4     1.3    -      -       +      -
     85B  MET*     3.5    48.8    +      -       +      +
     86B  GLY      5.4     0.2    -      -       -      -
     88B  THR      2.8    12.6    +      -       -      +
     89B  GLU      3.4     9.0    -      -       -      +
     90B  GLU      3.3     0.2    -      -       -      -
     91B  GLU*     1.3    76.0    -      -       -      +
     93B  TYR*     1.3    64.6    +      -       -      +
     95B  VAL*     3.1     4.4    +      -       -      +
     96B  GLU*     3.1    30.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 93 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     66A  LYS*     5.0     7.4    -      -       -      -
     67A  TRP      4.7     3.5    +      -       -      -
     68A  MET*     3.5    35.3    -      -       +      -
     69A  VAL*     2.7    44.8    +      -       -      +
     73A  ALA*     3.7    24.5    -      -       +      -
     74A  ILE*     4.0     6.7    -      -       +      -
     77A  TYR*     3.6    28.3    -      -       +      -
     89B  GLU      2.9     7.5    +      -       -      -
     90B  GLU*     3.6     7.2    -      -       -      +
     91B  GLU      3.3     0.2    -      -       -      -
     92B  TYR*     1.3    79.0    -      -       -      +
     94B  ASN*     1.3    81.7    +      -       -      +
     96B  GLU*     3.3     5.4    +      -       -      +
     97B  LYS*     2.8    46.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 94 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     90B  GLU*     2.9    25.1    +      -       -      +
     91B  GLU*     3.2     9.8    +      -       -      +
     93B  TYR*     1.3    85.2    -      -       -      +
     95B  VAL*     1.3    65.6    +      -       -      +
     97B  LYS*     3.3    30.5    -      -       -      +
     98B  LEU*     3.2    22.0    +      -       -      +
    151B  ALA      5.5     0.4    -      -       -      +
    152B  VAL*     3.6    24.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 95 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     84B  MET      4.5     0.2    -      -       -      +
     85B  MET*     4.0    35.9    -      -       +      +
     86B  GLY      4.0     1.3    -      -       -      +
     91B  GLU      2.8    19.5    +      -       -      +
     92B  TYR      3.1     6.9    +      -       -      +
     94B  ASN*     1.3    78.4    -      -       -      +
     96B  GLU*     1.3    57.7    +      -       -      +
     98B  LEU      3.3     0.2    +      -       -      -
     99B  ILE*     3.0    45.2    +      -       +      +
    152B  VAL*     3.8    18.4    -      -       +      -
    157B  THR*     3.8    26.7    -      -       +      +
    159B  ALA*     3.7    19.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 96 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     73A  ALA*     3.6    25.7    +      -       +      +
     76A  ARG*     3.4    31.0    +      -       +      -
     96A  GLU*     3.9     1.2    -      -       -      +
     76B  ARG*     2.7    49.6    +      -       -      -
     85B  MET*     3.5    15.1    -      -       +      +
     92B  TYR*     3.1    31.5    +      -       +      +
     93B  TYR*     3.6     8.1    -      -       -      +
     95B  VAL*     1.3    73.7    -      -       -      +
     97B  LYS*     1.3    59.2    +      -       -      +
     99B  ILE*     3.8     4.6    -      -       -      +
    100B  GLY*     2.9    26.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 97 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     69A  VAL*     3.6    18.5    -      -       +      +
     70A  GLU*     3.5     7.0    -      -       +      +
     73A  ALA*     3.5     9.6    -      -       -      +
     93B  TYR*     2.8    49.2    +      -       +      +
     94B  ASN*     3.3    28.9    -      -       -      +
     95B  VAL      3.3     0.2    -      -       -      -
     96B  GLU*     1.3    74.6    -      -       -      +
     98B  LEU*     1.3    59.4    -      -       -      +
    100B  GLY      3.2     1.6    +      -       -      -
    101B  GLN*     3.0    45.9    +      -       -      +
    142B  SER*     2.8    43.0    +      -       -      +
    145B  ALA*     5.4     4.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 98 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     94B  ASN      3.2    14.7    +      -       -      +
     97B  LYS*     1.3    78.8    -      -       -      +
     99B  ILE*     1.3    66.1    +      -       -      +
    101B  GLN*     3.3    22.2    +      -       -      +
    102B  ALA*     2.9    25.3    +      -       -      +
    139B  ILE*     4.1    26.9    -      -       +      +
    142B  SER*     3.7    23.6    -      -       -      -
    143B  LEU*     4.1     7.4    -      -       +      -
    151B  ALA*     3.5    43.1    -      -       +      +
    152B  VAL*     4.9     0.2    -      -       +      -
    159B  ALA*     3.9    17.9    -      -       +      +
    163B  LEU*     5.1     7.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 99 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     72B  LEU*     4.7     5.6    -      -       +      -
     76B  ARG*     3.5    26.2    -      -       -      +
     85B  MET*     4.7     0.7    -      -       +      -
     95B  VAL*     3.0    33.6    +      -       +      +
     96B  GLU*     3.8    17.9    -      -       -      +
     98B  LEU*     1.3    76.5    -      -       -      +
    100B  GLY*     1.3    58.4    +      -       -      +
    102B  ALA*     3.3     1.4    +      -       -      +
    103B  GLU*     2.9    45.1    +      -       +      +
    158B  LEU*     3.7    31.9    -      -       +      -
    159B  ALA*     4.0    15.5    -      -       -      +
    162B  VAL*     4.2    21.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 100 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     70A  GLU*     3.6    19.0    -      -       -      +
     73A  ALA*     6.1     0.2    -      -       -      -
     96B  GLU      2.9    15.2    +      -       -      -
     97B  LYS      3.5     4.7    -      -       -      -
     99B  ILE*     1.3    78.1    -      -       -      +
    101B  GLN*     1.3    55.9    +      -       -      +
    103B  GLU*     3.5    12.8    +      -       -      +
    104B  ASP*     3.0    33.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 101 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     52A  ARG*     4.4     4.8    -      -       -      +
     69A  VAL*     4.1    13.9    -      -       -      +
     70A  GLU*     3.8    16.6    -      -       +      +
     97B  LYS*     3.0    34.9    +      -       -      +
     98B  LEU*     3.3    12.5    +      -       -      +
    100B  GLY*     1.3    74.6    -      -       -      +
    102B  ALA*     1.3    63.2    +      -       -      +
    104B  ASP*     3.4     8.6    +      -       -      +
    105B  LEU*     3.2    20.1    +      -       -      +
    135B  LEU*     4.5     5.5    -      -       +      +
    138B  ILE*     3.4    28.8    -      -       +      +
    139B  ILE*     4.0    17.8    -      -       +      +
    142B  SER*     2.6    36.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 102 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98B  LEU      2.9    17.4    +      -       -      +
    101B  GLN*     1.3    73.2    -      -       -      +
    103B  GLU*     1.3    55.8    +      -       -      +
    105B  LEU*     3.1    10.2    +      -       -      +
    106B  GLU*     2.7    33.3    +      -       -      +
    139B  ILE*     4.3     5.5    -      -       +      +
    159B  ALA      5.8     0.2    -      -       -      +
    162B  VAL*     3.6    26.9    -      -       +      +
    163B  LEU*     4.5    17.3    -      -       +      -
    166B  VAL*     3.5    19.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 103 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1208A  BME      3.4    32.1    +      -       -      -
     72B  LEU*     3.4    31.9    -      -       +      +
     76B  ARG*     4.3     0.2    +      -       -      -
     99B  ILE*     2.9    30.3    +      -       +      +
    100B  GLY*     3.6    10.6    -      -       -      +
    102B  ALA*     1.3    74.1    -      -       -      +
    104B  ASP*     1.3    60.7    +      -       -      +
    106B  GLU*     3.5    11.1    -      -       +      +
    107B  HIS*     2.9    29.5    +      -       -      +
    162B  VAL*     5.0     3.8    -      -       +      +
    166B  VAL*     4.9     0.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 104 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     52A  ARG*     2.6    38.4    +      -       -      +
     70A  GLU*     3.0    13.1    -      -       -      +
   1207A  SO4      5.0     2.0    -      -       -      -
    100B  GLY      3.0    16.6    +      -       -      +
    101B  GLN*     3.4    10.3    -      -       -      +
    103B  GLU*     1.3    75.8    -      -       -      +
    105B  LEU*     1.3    63.0    +      -       -      +
    107B  HIS*     3.4    15.2    +      -       -      +
    108B  GLU*     3.4    12.3    +      -       -      +
    135B  LEU*     3.5    22.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 105 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101B  GLN      3.2     9.0    +      -       -      +
    102B  ALA*     3.1    11.5    +      -       -      +
    104B  ASP*     1.3    77.8    -      -       -      +
    106B  GLU*     1.3    64.2    +      -       -      +
    108B  GLU*     3.0    16.3    +      -       +      +
    109B  TYR*     3.2    10.4    +      -       -      +
    132B  VAL*     3.9    35.7    -      -       +      +
    135B  LEU*     3.5    15.2    -      -       +      +
    136B  LEU*     3.8    27.1    -      -       +      -
    139B  ILE*     3.9    16.2    -      -       +      -
    166B  VAL*     3.5    19.1    -      -       +      -
    167B  ILE*     4.3     6.1    -      -       +      -
    170B  VAL*     3.8    24.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 106 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     15B  GLY      5.5     1.7    -      -       -      +
     16B  ARG*     5.6     1.4    -      -       -      +
    102B  ALA      2.7    19.7    +      -       -      +
    103B  GLU*     3.5    12.8    -      -       +      +
    105B  LEU*     1.3    72.7    -      -       -      +
    107B  HIS*     1.3    56.7    +      -       -      +
    109B  TYR*     3.2    11.6    +      -       -      +
    110B  TYR*     2.9    66.6    +      -       +      +
    165B  ALA*     5.9     0.5    -      -       -      +
    166B  VAL*     3.6    22.0    -      -       +      +
    169B  HIS*     2.7    41.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 107 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    107A  HIS*     3.5    37.1    +      +       -      -
    110A  TYR*     6.0     6.3    -      +       +      -
    103B  GLU      2.9    17.1    +      -       -      +
    104B  ASP*     3.5     8.5    -      -       -      +
    105B  LEU      3.2     0.2    -      -       -      -
    106B  GLU*     1.3    73.1    -      -       -      +
    108B  GLU*     1.3    84.0    +      -       -      +
    110B  TYR*     3.4    25.0    +      -       +      +
    111B  LYS*     3.5    23.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 108 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    104B  ASP      3.4    12.1    +      -       -      +
    105B  LEU      3.0    10.0    +      -       -      +
    107B  HIS*     1.3    89.6    -      -       -      +
    109B  TYR*     1.3    66.6    +      -       -      +
    111B  LYS*     2.8    52.7    +      -       -      +
    112B  THR      4.0     0.2    +      -       -      -
    127B  ILE*     3.4    25.4    -      -       +      +
    131B  LYS*     3.3    46.1    -      -       +      +
    132B  VAL*     4.0    20.4    -      -       +      -
    135B  LEU*     4.2     8.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 109 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     12B  ASN*     5.7     0.7    +      -       -      -
     14B  ARG*     5.1     4.7    +      -       -      +
    105B  LEU      3.2     7.7    +      -       -      +
    106B  GLU*     3.2    25.2    +      -       -      +
    108B  GLU*     1.3    76.6    -      -       -      +
    110B  TYR*     1.3    72.9    +      +       -      +
    112B  THR*     2.7    27.9    +      -       -      -
    113B  LEU*     3.4    40.4    +      -       +      +
    120B  LYS*     5.9     0.7    -      -       -      -
    127B  ILE*     4.1     9.8    -      -       -      +
    132B  VAL*     5.6     0.6    -      -       -      +
    166B  VAL*     5.9     0.7    -      -       +      -
    169B  HIS*     3.4    62.9    +      +       +      -
    170B  VAL*     5.4     4.9    -      -       +      +
    172B  ASP*     4.5     9.0    +      -       +      +
    173B  LEU*     4.0    24.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 110 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    107A  HIS*     6.0     6.3    -      +       +      -
     16B  ARG*     3.6    30.6    -      -       +      +
    106B  GLU*     2.9    56.0    +      -       +      +
    107B  HIS*     3.5    20.6    -      -       +      +
    108B  GLU      3.1     0.4    -      -       -      -
    109B  TYR*     1.3    87.3    -      +       -      +
    111B  LYS*     1.3    55.8    +      -       -      +
    112B  THR      3.1     0.2    -      -       -      -
    113B  LEU*     3.0    45.5    +      -       +      +
    169B  HIS*     5.6     0.2    -      +       -      -
----------------------------------------------------------
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Residues in contact with LYS 111 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    107B  HIS*     3.6    26.7    -      -       +      +
    108B  GLU*     2.8    51.5    +      -       -      +
    110B  TYR*     1.3    75.6    -      -       -      +
    112B  THR*     1.3    59.1    +      -       -      +
    113B  LEU      3.3     0.2    -      -       -      -
    115B  LYS*     3.5    22.7    -      -       -      +
    123B  ILE*     3.6    23.5    -      -       +      +
    127B  ILE*     4.0    10.5    -      -       +      +
    131B  LYS*     3.6    13.9    -      -       -      +
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


   I  Hydrophilic      - N and O that can donate and accept hydrogen bonds
                         (e.g., oxygen of hydroxyl group of Ser. or Thr)
  II  Acceptor         - N or O that can only accept a hydrogen bond
 III  Donor            - N that can only donate a hydrogen bond
  IV  Hydrophobic      - Cl, Br, I and all C atoms that are not in
                         aromatic rings and do not have a covalent bond to
                         a N or O atom
   V  Aromatic         - C in aromatic rings irrespective of any other 
                         bonds formed by the atom
  VI  Neutral          - C atoms that have a covalent bond to at least one
                         atom of class I or two or more atoms from class II
                         or III; atoms; S, F, P, and metal atoms in all cases
 VII  Neutral-donor    - C atoms that have a covalent bond with only one
                         atom of class III
VIII  Neutral-acceptor - C atoms that have a covalent bond with only 
                         one atom of class II
For each pair of contacts the state of legitimacy is shown below:

Legend:
+, legitimate
-, illegitimate
------------------------------------------------------------
  Atomic class           I  II  III   IV   V   VI  VII  VIII
------------------------------------------------------------
   I  (Hydrophilic)      +   +    +    -   +   +    +    +
  II  (Acceptor)         +   -    +    -   +   +    +    -
 III  (Donor)            +   +    -    -   +   +    -    +
  IV  (Hydrophobic)      -   -    -    +   +   +    +    +
   V  (Aromatic)         +   +    +    +   +   +    +    +
  VI  (Neutral)          +   +    +    +   +   +    +    +
 VII  (Neutral-donor)    +   +    -    +   +   +    -    +
VIII  (Neutral-acceptor) +   -    +    +   +   +    +    -
------------------------------------------------------------
Warning!
Atom classes for heterogroups are automatically assigned based on the atomic coordinates. However, in three cases (see below) the automatic assignment is currently ambiguous. In these cases, the user is advised to manually analyse the full list of contacts using LPC software.
1. Carbon atoms belonging to a 4-, 5- or 6-member ring are 
   considered "aromatic" (Class V) if the ring is approximately
   planar, and "hydrophobic" (Class IV) or "neutral" (Classes
   VI, VII, VIII) if the ring is non-planar.
2. The oxygen atom of a carbonyl or hydroxy group is considered
   "hydroxy" (Class I) if the CO bond is longer than 1.29 Å, and
   "carbonyl" (Class II) if shorter.
3. All nitrogen atoms are considered "hydrophilic" (Class I).

Please E-mail any questions and/or suggestions concerning this page to Vladimir.Sobolev@weizmann.ac.il