Contacts of the helix formed by residues 37 - 64 (chain B) in PDB entry 2YEV


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 PHE 37 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     33B  GLN      4.9     1.4    +      -       -      -
     34B  GLU      3.2    27.4    -      -       -      -
     35B  VAL*     2.9     2.5    +      -       -      -
     36B  ALA*     1.3    77.1    -      -       -      +
     38B  LEU*     1.3    81.4    +      -       +      +
     39B  PHE      3.4     0.2    -      -       -      -
     40B  PRO*     3.3    12.8    -      -       -      +
     41B  TRP*     3.3    30.0    -      +       -      +
    101B  LEU*     3.9    25.1    -      -       +      -
    104B  LYS*     5.1    13.2    -      -       +      -
    105B  ALA*     3.8    31.6    -      -       +      -
    108B  GLN*     5.5     4.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 38 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    369A  MET*     3.9    23.2    -      -       +      +
    371A  PRO*     4.1    17.7    -      -       +      -
    372A  LEU*     4.0    27.1    -      -       +      -
     35B  VAL*     2.9    15.9    +      -       +      +
     37B  PHE*     1.3    95.2    -      -       +      +
     39B  PHE*     1.3    65.0    -      -       -      +
     41B  TRP*     3.3     8.5    +      -       -      +
     42B  VAL*     3.1    24.2    +      -       -      +
    101B  LEU*     3.7    39.5    -      -       +      +
    102B  THR*     4.2     1.8    -      -       -      +
    105B  ALA*     3.9    17.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 39 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    366A  MET*     4.6     3.6    -      -       +      -
    372A  LEU*     3.6    37.0    -      -       +      -
    375A  GLN*     6.3     0.9    -      -       +      -
    376A  PHE*     4.0    10.5    -      +       -      -
    442A  TYR*     3.3    26.2    -      +       -      -
     24B  ILE*     4.1    25.1    -      -       +      -
     25B  THR*     4.2    17.9    -      -       +      -
     35B  VAL*     4.9     9.0    -      -       +      -
     36B  ALA*     3.3    19.0    +      -       +      +
     38B  LEU*     1.3    78.6    -      -       -      +
     40B  PRO*     1.3    70.2    -      -       +      +
     42B  VAL*     3.1     5.9    +      -       +      +
     43B  TYR*     2.9    58.7    +      +       +      -
----------------------------------------------------------
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Residues in contact with PRO 40 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     36B  ALA      3.2    16.6    -      -       -      +
     37B  PHE*     3.3    15.3    -      -       -      +
     39B  PHE*     1.3    92.0    -      -       +      +
     41B  TRP*     1.3    59.0    +      -       +      +
     43B  TYR*     3.3    11.6    +      -       +      +
     44B  PHE*     2.9    31.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with TRP 41 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     37B  PHE*     3.3    29.3    -      +       -      +
     38B  LEU*     3.3     8.2    +      -       +      +
     39B  PHE      3.2     0.4    -      -       -      -
     40B  PRO*     1.3    81.2    -      -       +      +
     42B  VAL*     1.3    62.2    -      -       -      +
     44B  PHE*     3.8    14.9    -      +       +      +
     45B  PHE*     3.1    62.6    +      +       -      -
     97B  VAL*     4.3     9.9    -      -       +      -
     98B  LEU*     4.7     6.5    -      -       +      -
    101B  LEU*     3.4    42.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 42 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    362A  ILE*     5.2     0.4    -      -       +      -
    366A  MET*     3.7    41.1    -      -       +      -
    369A  MET*     3.5    34.8    -      -       +      -
    372A  LEU*     4.5     8.3    -      -       +      -
     38B  LEU      3.1    16.0    +      -       -      +
     39B  PHE*     3.1     9.4    +      -       +      +
     41B  TRP*     1.3    76.7    -      -       -      +
     43B  TYR*     1.3    69.5    +      -       +      +
     45B  PHE*     4.1     2.4    -      -       -      +
     46B  SER*     2.6    40.4    +      -       -      +
     98B  LEU*     4.5     9.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 43 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    366A  MET*     5.1     1.8    -      -       +      -
    442A  TYR*     3.0    36.0    +      +       -      -
     25B  THR*     5.4     1.4    -      -       -      +
     39B  PHE*     2.9    51.5    +      +       +      +
     40B  PRO*     3.7     9.0    -      -       +      +
     42B  VAL*     1.3    88.1    -      -       +      +
     44B  PHE*     1.3    55.7    +      -       -      +
     46B  SER*     3.9     4.2    -      -       -      -
     47B  PHE*     3.0    31.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 44 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     40B  PRO      2.9    18.1    +      -       -      +
     41B  TRP*     3.8    16.6    -      +       +      +
     42B  VAL      3.3     0.2    -      -       -      -
     43B  TYR*     1.3    75.7    -      -       -      +
     45B  PHE*     1.3    87.2    +      +       -      +
     47B  PHE*     3.2     9.3    +      +       -      +
     48B  LEU*     3.1    56.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 45 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41B  TRP*     3.1    47.6    +      +       -      +
     42B  VAL*     4.2     2.5    -      -       -      +
     44B  PHE*     1.3    97.4    -      +       -      +
     46B  SER*     1.3    59.0    +      -       -      +
     48B  LEU*     3.3     9.5    +      -       +      +
     49B  ILE*     2.8    40.1    +      -       +      +
     94B  ILE*     4.0    43.7    -      -       +      -
     97B  VAL*     3.9    30.7    -      -       +      -
     98B  LEU*     4.0    22.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 46 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    362A  ILE*     3.2    38.3    -      -       -      +
     42B  VAL*     2.6    29.5    +      -       -      +
     43B  TYR*     3.9     4.7    -      -       -      -
     45B  PHE*     1.3    77.5    -      -       -      +
     47B  PHE*     1.3    58.6    +      -       -      +
     49B  ILE*     3.8     6.0    -      -       -      +
     50B  PHE*     2.8    32.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 47 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     43B  TYR      3.0    20.1    +      -       -      +
     44B  PHE*     3.5     9.6    -      +       +      +
     46B  SER*     1.3    77.8    -      -       -      +
     48B  LEU*     1.3    71.4    +      -       +      +
     50B  PHE*     3.4     6.0    +      +       +      +
     51B  LEU*     2.9    62.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 48 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     44B  PHE*     3.1    56.0    +      -       +      +
     45B  PHE*     3.8    10.5    -      -       +      +
     47B  PHE*     1.3    90.5    -      -       +      +
     49B  ILE*     1.3    68.0    +      -       +      +
     51B  LEU*     3.3     9.2    +      -       +      +
     52B  VAL*     3.0    34.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 49 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    330A  PHE*     6.1     1.3    -      -       +      -
    358A  LEU*     4.5    13.5    -      -       +      -
    362A  ILE*     4.2    28.3    -      -       +      -
     45B  PHE*     2.8    31.6    +      -       +      +
     46B  SER*     4.0     4.3    -      -       -      +
     48B  LEU*     1.3    73.6    -      -       +      +
     50B  PHE*     1.3    58.9    +      -       -      +
     52B  VAL*     4.9     3.4    -      -       -      -
     53B  VAL*     3.0    43.4    +      -       +      +
     94B  ILE*     4.2    31.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 50 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    355A  PHE*     4.7    14.4    -      +       +      -
    358A  LEU*     4.3    20.0    -      -       +      -
    359A  LEU*     5.7     6.3    -      -       +      -
     46B  SER      2.8    21.0    +      -       -      +
     47B  PHE*     3.7     6.3    -      +       -      +
     48B  LEU      3.1     0.2    -      -       -      -
     49B  ILE*     1.3    75.6    -      -       -      +
     51B  LEU*     1.3    73.4    +      -       +      +
     54B  ALA*     3.0    51.9    +      -       +      +
     55B  GLY      3.6     0.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 51 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     47B  PHE*     2.9    59.2    +      -       +      +
     48B  LEU*     3.3    12.3    +      -       +      +
     50B  PHE*     1.3    80.4    -      -       +      +
     52B  VAL*     1.3    64.0    +      -       +      +
     55B  GLY*     3.1    21.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 52 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48B  LEU*     3.0    21.9    +      -       +      +
     49B  ILE*     4.1     2.9    -      -       -      +
     51B  LEU*     1.3    77.0    -      -       +      +
     53B  VAL*     1.3    69.2    +      -       +      +
     56B  SER*     2.9    40.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 53 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    329A  LEU*     6.1     2.2    -      -       +      -
    330A  PHE*     3.4    35.0    -      -       +      -
    333A  ILE*     3.9    23.1    -      -       +      +
    354A  ILE*     5.4     2.7    -      -       +      -
    358A  LEU*     3.6    29.2    -      -       +      -
     49B  ILE*     3.0    28.3    +      -       +      +
     52B  VAL*     1.3    81.0    -      -       +      +
     54B  ALA*     1.3    65.1    +      -       -      +
     56B  SER*     3.5     6.3    +      -       -      -
     57B  LEU*     3.1    22.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 54 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    355A  PHE*     3.5    22.2    -      -       +      -
    358A  LEU*     3.8    19.4    -      -       +      +
     50B  PHE*     3.0    43.7    +      -       +      +
     53B  VAL*     1.3    76.1    -      -       -      +
     55B  GLY*     1.3    58.8    +      -       -      +
     57B  LEU*     3.3     2.0    +      -       -      +
     58B  ALA*     2.9    29.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 55 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     50B  PHE      3.6     0.4    +      -       -      -
     51B  LEU*     3.1    23.3    +      -       -      +
     54B  ALA*     1.3    79.6    -      -       -      +
     56B  SER*     1.3    55.4    +      -       -      +
     58B  ALA*     3.2     8.0    +      -       -      +
     59B  TYR*     2.8    29.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 56 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    333A  ILE*     4.9     9.9    -      -       -      -
    337A  TRP*     4.3    15.9    -      -       -      -
     52B  VAL*     2.9    27.9    +      -       -      +
     53B  VAL*     3.7     7.2    -      -       -      -
     55B  GLY*     1.3    75.0    -      -       -      +
     57B  LEU*     1.3    57.9    +      -       -      +
     59B  TYR*     3.3     8.2    +      -       -      +
     60B  VAL*     2.9    34.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 57 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    333A  ILE*     4.2    21.0    -      -       +      +
    336A  LEU*     3.9    18.8    -      -       +      -
    351A  LEU*     3.9    23.6    -      -       +      +
    354A  ILE*     3.3    39.0    -      -       +      -
    355A  PHE*     3.6    35.4    -      -       +      +
    358A  LEU*     6.4     0.2    -      -       +      -
     53B  VAL      3.1    17.7    +      -       -      +
     54B  ALA*     3.8     4.3    -      -       -      +
     55B  GLY      3.2     0.4    -      -       -      -
     56B  SER*     1.3    76.9    -      -       -      +
     58B  ALA*     1.3    63.0    +      -       -      +
     60B  VAL*     3.4     5.9    +      -       +      +
     61B  THR*     3.1    31.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 58 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    355A  PHE*     3.8    13.4    -      -       +      -
     54B  ALA      2.9    18.3    +      -       -      +
     55B  GLY*     3.5     7.2    -      -       -      +
     57B  LEU*     1.3    74.5    -      -       -      +
     59B  TYR*     1.3    64.4    +      -       -      +
     61B  THR*     3.0    21.5    +      -       -      -
     62B  TRP*     3.2    11.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 59 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    337A  TRP*     3.6    37.9    -      +       -      -
     55B  GLY      2.8    13.3    +      -       -      +
     56B  SER*     3.5    10.5    -      -       -      +
     58B  ALA*     1.3    76.7    -      -       -      +
     60B  VAL*     1.3    55.5    +      -       -      +
     62B  TRP*     3.1    32.5    +      +       -      +
     63B  LYS*     2.8    71.2    +      -       +      +
     64B  PHE*     4.2     4.6    -      +       -      -
----------------------------------------------------------
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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
----------------------------------------------------------
    333A  ILE*     4.5     8.5    -      -       +      +
    336A  LEU*     3.6    42.0    -      -       +      +
    337A  TRP*     3.1    48.9    -      -       +      +
    341A  LEU*     4.0     9.1    -      -       +      +
     56B  SER      2.9    16.9    +      -       -      +
     57B  LEU*     3.7    10.1    -      -       +      +
     59B  TYR*     1.3    75.6    -      -       -      +
     61B  THR*     1.3    59.4    +      -       +      +
     64B  PHE*     2.9    38.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 61 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    341A  LEU*     4.0    12.3    -      -       +      -
    343A  MET*     4.1    14.8    -      -       -      +
    351A  LEU*     3.7    37.9    -      -       +      -
    355A  PHE*     5.1     5.4    -      -       +      -
     57B  LEU*     3.1    20.0    +      -       +      +
     58B  ALA*     3.0    17.4    +      -       -      -
     59B  TYR      3.2     0.2    -      -       -      -
     60B  VAL*     1.3    76.7    -      -       +      +
     62B  TRP*     1.3    59.8    +      -       -      +
     65B  ARG*     3.5    22.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with TRP 62 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     58B  ALA      3.2     8.2    +      -       -      +
     59B  TYR*     3.1    36.1    +      +       -      +
     61B  THR*     1.3    84.5    +      -       -      +
     63B  LYS*     1.3    92.3    +      -       +      +
     65B  ARG*     4.1     8.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 63 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     59B  TYR*     2.8    55.9    +      -       +      +
     62B  TRP*     1.3    95.7    -      -       +      +
     64B  PHE*     1.3    89.2    +      -       +      +
     65B  ARG      3.5     2.7    +      -       -      +
----------------------------------------------------------
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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
----------------------------------------------------------
    336A  LEU      4.3     4.3    -      -       -      +
    337A  TRP*     3.5    37.5    -      +       -      -
    338A  GLY*     3.1    43.3    -      -       -      -
    339A  GLY      3.2    20.6    -      -       -      +
    340A  LYS*     3.4     1.0    -      -       -      -
    341A  LEU*     2.8    30.3    +      -       +      -
     59B  TYR*     4.2     6.7    -      +       -      -
     60B  VAL*     2.9    29.5    +      -       +      +
     63B  LYS*     1.3   105.1    -      -       +      +
     65B  ARG*     1.3    63.3    +      -       -      +
----------------------------------------------------------
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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