Contacts of the helix formed by residues 82 - 108 (chain B) in PDB entry 4NEF


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 SER 82 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     76B  LEU*     3.9     3.8    -      -       -      -
     81B  VAL*     1.3    79.8    -      -       -      +
     83B  VAL*     1.3    59.3    +      -       -      +
     84B  LEU*     3.7    11.0    +      -       -      +
     85B  ARG*     3.1    25.3    +      -       -      +
     86B  ALA*     2.9    29.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 83 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     76B  LEU*     3.8    28.2    -      -       +      +
     82B  SER*     1.3    71.4    -      -       -      +
     84B  LEU*     1.4    58.7    +      -       +      +
     86B  ALA*     3.7     1.3    -      -       +      +
     87B  ALA*     3.1    29.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 84 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      9B  PHE*     3.8    28.0    -      -       +      -
     82B  SER*     3.1    10.0    -      -       -      +
     83B  VAL*     1.4    80.0    -      -       +      +
     85B  ARG*     1.4    63.6    +      -       -      +
     87B  ALA*     3.4     5.7    +      -       +      +
     88B  PHE*     3.1    52.2    +      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 85 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8B  ALA      5.8     0.8    -      -       -      -
      9B  PHE*     3.8    38.3    -      -       +      +
     12B  ALA*     3.6    15.4    -      -       -      +
     63B  SER*     5.5     0.4    -      -       -      +
     81B  VAL*     3.5    23.1    -      -       +      +
     82B  SER*     3.1    19.9    +      -       -      +
     84B  LEU*     1.4    75.7    -      -       -      +
     86B  ALA*     1.4    55.8    +      -       -      +
     88B  PHE*     3.3     2.1    +      -       -      +
     89B  TYR*     2.8    86.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 86 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     72B  THR*     3.5    21.0    -      -       +      +
     73B  VAL*     6.4     0.9    -      -       +      -
     76B  LEU*     3.7    33.7    -      -       +      -
     81B  VAL*     4.5     6.0    -      -       +      +
     82B  SER      2.9    16.6    +      -       -      +
     83B  VAL      3.7     4.7    -      -       -      +
     85B  ARG*     1.4    76.5    -      -       -      +
     87B  ALA*     1.4    56.5    +      -       -      +
     90B  VAL*     3.0    35.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 87 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     83B  VAL*     3.1    19.0    +      -       +      +
     84B  LEU*     3.7     7.2    -      -       +      +
     85B  ARG      3.3     0.2    -      -       -      -
     86B  ALA*     1.4    72.5    -      -       -      +
     88B  PHE*     1.4    62.4    +      -       +      +
     90B  VAL*     3.4     6.3    +      -       -      +
     91B  ALA*     2.9    32.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 88 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      9B  PHE*     3.5    36.6    -      +       +      -
     13B  VAL*     3.6    24.0    -      -       +      +
     84B  LEU*     3.1    45.9    +      -       +      +
     85B  ARG      3.7     2.7    -      -       -      +
     87B  ALA*     1.4    80.2    -      -       +      +
     89B  TYR*     1.3    57.2    +      -       -      +
     91B  ALA*     4.0     5.5    -      -       -      +
     92B  ALA*     3.1    28.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 89 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      9B  PHE*     4.8     0.2    -      +       -      -
     12B  ALA*     3.2    24.7    -      -       +      +
     13B  VAL*     4.1    11.9    -      -       +      -
     16B  GLU*     3.7    23.7    -      -       +      +
     63B  SER*     2.9    19.8    +      -       -      -
     66B  HIS*     3.3    40.4    -      +       -      -
     72B  THR*     3.7    19.1    -      -       +      -
     81B  VAL*     5.8     2.0    -      -       +      -
     85B  ARG*     2.8    66.1    +      -       +      +
     86B  ALA*     5.5     0.2    -      -       -      -
     88B  PHE*     1.3    75.4    -      -       -      +
     90B  VAL*     1.3    55.6    +      -       -      +
     92B  ALA*     3.1     6.5    +      -       -      +
     93B  GLN*     2.8    44.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 90 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     69B  PRO*     3.9    25.5    -      -       +      +
     72B  THR*     3.8    20.9    -      -       +      -
     73B  VAL*     4.7     9.4    -      -       +      -
     86B  ALA*     3.0    23.0    +      -       +      +
     87B  ALA*     3.9     5.8    -      -       -      +
     89B  TYR*     1.3    71.7    -      -       -      +
     91B  ALA*     1.4    57.0    +      -       -      +
     93B  GLN*     3.3     9.2    +      -       -      +
     94B  LEU*     3.0    51.6    +      -       +      +
    205B  TRP*     6.1     2.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 91 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     87B  ALA      2.9    19.0    +      -       -      +
     88B  PHE*     4.0     7.2    -      -       -      +
     90B  VAL*     1.4    75.5    -      -       -      +
     92B  ALA*     1.4    57.2    +      -       -      +
     94B  LEU*     3.6     9.4    +      -       -      +
     95B  LEU*     3.1    42.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 92 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     13B  VAL*     3.5    33.2    -      -       +      +
     16B  GLU*     4.2     3.8    -      -       +      -
     17B  PHE*     3.4    25.6    -      -       +      +
     88B  PHE      3.1    19.1    +      -       -      +
     89B  TYR*     3.1     6.1    +      -       -      +
     91B  ALA*     1.4    73.0    -      -       -      +
     93B  GLN*     1.3    56.0    +      -       -      +
     95B  LEU*     4.6     5.8    -      -       -      -
     96B  GLY      2.8    27.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 93 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     16B  GLU*     2.9    29.2    +      -       +      +
     20B  THR*     3.4    29.6    -      -       +      +
     66B  HIS*     3.7     5.7    -      -       -      +
     68B  ASN      3.8    11.9    -      -       -      +
     69B  PRO*     3.0    34.7    -      -       +      +
     72B  THR*     2.8    24.2    +      -       -      -
     89B  TYR*     2.8    27.3    +      -       -      +
     90B  VAL*     3.6     7.6    -      -       -      +
     92B  ALA*     1.3    73.5    -      -       -      +
     94B  LEU*     1.4    55.7    +      -       -      +
     97B  ALA*     2.9    35.9    +      -       -      +
    186B  ALA*     4.1     3.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 94 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     69B  PRO*     4.3     6.5    -      -       +      -
     90B  VAL*     3.0    40.1    +      -       +      +
     91B  ALA*     4.0     7.0    -      -       -      +
     93B  GLN*     1.4    74.4    -      -       -      +
     95B  LEU*     1.3    61.3    +      -       +      +
     97B  ALA*     3.9     2.0    -      -       -      +
     98B  VAL*     3.2    26.0    +      -       -      +
    186B  ALA*     4.1    22.2    -      -       +      -
    189B  LEU*     3.8    25.7    -      -       +      +
    205B  TRP*     3.8    30.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 95 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     17B  PHE*     3.9    15.2    -      -       +      -
     91B  ALA*     3.1    29.3    +      -       +      +
     92B  ALA*     3.9     6.3    -      -       -      +
     94B  LEU*     1.3    75.7    -      -       +      +
     96B  GLY*     1.3    58.5    +      -       -      +
     98B  VAL*     3.3    13.3    -      -       +      +
     99B  ALA*     3.1    29.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 96 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     17B  PHE*     3.4    36.7    -      -       -      -
     21B  LEU*     3.1    20.2    -      -       -      +
     92B  ALA      2.8    13.8    +      -       -      -
     93B  GLN      3.8     0.9    -      -       -      -
     95B  LEU*     1.3    73.4    -      -       -      +
     97B  ALA*     1.3    57.6    +      -       -      +
     99B  ALA*     3.3     2.0    +      -       -      +
    100B  GLY      2.9    23.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 97 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     20B  THR*     3.9     5.7    -      -       +      -
     24B  VAL*     3.3    28.0    -      -       +      +
     93B  GLN      2.9    19.1    +      -       -      +
     94B  LEU      3.9     4.3    -      -       -      +
     95B  LEU      3.4     0.2    -      -       -      -
     96B  GLY*     1.3    71.7    -      -       -      +
     98B  VAL*     1.4    59.9    +      -       -      +
    100B  GLY      3.0     2.3    +      -       -      -
    101B  ALA      3.0    23.6    +      -       -      -
    186B  ALA*     3.3    34.1    -      -       +      +
    190B  ALA*     3.3     8.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 98 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     94B  LEU      3.2    13.1    +      -       -      +
     95B  LEU*     3.3    24.5    -      -       +      +
     97B  ALA*     1.4    76.1    -      -       -      +
     99B  ALA*     1.4    56.2    +      -       +      +
    101B  ALA*     3.4     1.4    +      -       -      +
    102B  ALA*     2.9    30.4    +      -       +      +
    189B  LEU*     6.3     2.5    -      -       +      -
    190B  ALA*     3.7    14.2    -      -       -      +
    193B  VAL*     3.7    34.3    -      -       +      -
    194B  VAL*     4.0    13.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 99 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     17B  PHE*     4.4     8.5    -      -       +      -
     21B  LEU*     3.8    20.2    -      -       +      -
     95B  LEU      3.1    19.5    +      -       -      +
     96B  GLY*     3.5     5.8    -      -       -      +
     97B  ALA      3.2     0.2    -      -       -      -
     98B  VAL*     1.4    76.1    -      -       +      +
    100B  GLY*     1.3    57.1    +      -       -      +
    102B  ALA*     3.9     5.1    -      -       -      +
    103B  LEU*     3.0    33.6    +      -       +      +
----------------------------------------------------------
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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
----------------------------------------------------------
     21B  LEU*     3.5    30.3    -      -       -      +
     24B  VAL*     4.1     5.4    -      -       -      -
     25B  PHE*     3.7    13.4    -      -       -      -
     96B  GLY      2.9    11.4    +      -       -      -
     97B  ALA      3.0     4.0    +      -       -      -
     99B  ALA*     1.3    77.2    -      -       -      +
    101B  ALA*     1.4    56.9    +      -       -      +
    103B  LEU*     3.7     2.6    +      -       -      -
    104B  LEU*     3.1    28.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 101 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     24B  VAL*     3.7     9.1    -      -       +      +
     28B  LEU*     4.2     9.0    -      -       +      -
     97B  ALA      3.0    14.8    +      -       -      +
     98B  VAL      3.8     3.6    -      -       -      +
    100B  GLY*     1.4    71.8    -      -       -      +
    102B  ALA*     1.4    59.6    +      -       -      +
    104B  LEU*     3.9     4.9    -      -       -      +
    105B  HIS*     3.1    26.0    +      -       -      +
    116B  LEU*     3.7    12.2    -      -       +      +
    190B  ALA*     3.6    34.5    -      -       +      +
    191B  PRO      4.1     2.5    -      -       -      -
    194B  VAL*     3.8     5.8    -      -       +      +
----------------------------------------------------------
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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  VAL*     2.9    20.6    +      -       +      +
     99B  ALA*     3.9     6.5    -      -       -      +
    101B  ALA*     1.4    72.4    -      -       -      +
    103B  LEU*     1.3    63.3    +      -       -      +
    105B  HIS*     3.5    11.9    +      -       +      +
    106B  GLU*     3.2    22.2    +      -       -      +
    194B  VAL*     3.8    14.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 103 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     21B  LEU*     4.1    19.7    -      -       +      -
     25B  PHE*     3.7    19.1    -      -       +      -
     99B  ALA*     3.0    20.9    +      -       +      +
    100B  GLY*     3.8     5.6    -      -       -      +
    102B  ALA*     1.3    74.3    -      -       -      +
    104B  LEU*     1.4    64.2    +      -       -      +
    106B  GLU*     3.4    18.5    -      -       -      +
    107B  ILE*     3.2    25.6    +      -       +      +
    132D  THR*     4.4    12.8    -      -       +      -
    136D  PHE*     3.7    41.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 104 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     24B  VAL      4.8     0.9    -      -       -      +
     25B  PHE*     3.8    25.1    -      -       +      +
     28B  LEU*     3.7    20.2    -      -       +      -
     29B  GLY*     3.5    36.8    -      -       -      +
     32B  LEU*     4.5     3.8    -      -       +      -
    100B  GLY      3.1    18.8    +      -       -      +
    101B  ALA*     3.9     3.6    -      -       -      +
    103B  LEU*     1.4    73.6    -      -       -      +
    105B  HIS*     1.3    62.8    +      -       -      +
    107B  ILE*     3.2     8.9    +      -       +      +
    108B  THR*     2.7    48.0    +      -       -      +
    116B  LEU*     4.1    20.6    -      -       +      -
    174D  LEU*     4.5     3.1    -      -       +      -
    178D  TYR*     3.5    13.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 105 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101B  ALA      3.1    19.4    +      -       -      +
    102B  ALA*     3.5     9.6    -      -       -      +
    103B  LEU      3.4     0.2    -      -       -      -
    104B  LEU*     1.3    74.8    -      -       -      +
    106B  GLU*     1.3    64.8    +      -       +      +
    108B  THR      3.2     6.4    -      -       -      +
    113B  ARG*     2.8    77.4    +      -       -      +
    116B  LEU*     4.3    14.3    -      -       +      +
    194B  VAL*     4.1    20.6    -      -       +      +
----------------------------------------------------------
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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
----------------------------------------------------------
    102B  ALA      3.2    10.1    +      -       -      +
    103B  LEU*     3.4    20.4    -      -       -      +
    104B  LEU      3.3     0.2    -      -       -      -
    105B  HIS*     1.3    85.3    -      -       +      +
    107B  ILE*     1.3    66.8    +      -       -      +
    113B  ARG*     4.3     5.6    +      -       -      +
    129D  GLN*     2.9    28.2    +      -       -      +
    132D  THR*     4.5    10.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 107 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     25B  PHE*     3.7    25.8    -      -       +      -
    103B  LEU*     3.3    16.6    -      -       +      +
    104B  LEU*     3.2    11.9    +      -       +      +
    106B  GLU*     1.3    91.6    -      -       +      +
    108B  THR*     1.3    58.7    +      -       -      +
    109B  PRO*     3.9     1.2    -      -       -      +
    125D  THR*     4.2     0.3    -      -       -      +
    129D  GLN*     3.4    52.3    -      -       +      +
    132D  THR*     3.7    23.6    -      -       +      -
    133D  VAL*     3.6    17.9    -      -       +      -
    178D  TYR*     3.5    36.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with THR 108 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     32B  LEU*     3.7    22.8    -      -       +      +
     34B  TRP*     4.1     2.2    -      -       +      -
    104B  LEU*     2.7    30.8    +      -       -      +
    105B  HIS      3.2     2.5    +      -       -      +
    107B  ILE*     1.3    76.8    -      -       -      +
    109B  PRO*     1.4    84.5    -      -       +      +
    110B  ALA      3.4     0.3    +      -       -      -
    112B  ILE*     4.1     8.7    -      -       +      -
    113B  ARG*     3.0    43.3    +      -       +      +
    116B  LEU*     5.6     0.7    -      -       -      -
    129D  GLN*     4.2     2.2    +      -       -      -
    178D  TYR*     2.8    23.0    +      -       -      +
----------------------------------------------------------
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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