Contacts of the helix formed by residues 68 - 92 (chain B) in PDB entry 3V3Q


Residue contacts within the protein are derived with the CSU software (Sobolev V., Sorokine A., Prilusky J., Abola E.E. and Edelman M. (1999) Automated analysis of interatomic contacts in proteins. Bioinformatics, 15, 327-332). A short description of the analytical approach is given at the end of the page.
For CSU analysis of other PDB entry

Note:
Non-standard 3 letter residue codes indicate a heterogroup. To identify and analyse, use LPC software

Legend:
Dist - nearest distance (Å) between atoms of two residues
Surf - contact surface area (Å2) between two residues
HB   - hydrophilic-hydrophilic contact (hydrogen bond)
Arom - aromatic-aromatic contact
Phob - hydrophobic-hydrophobic contact
DC   - hydrophobic-hydrophilic contact (destabilizing contact)
+/-  - indicates presence/absence of a specific contacts
*    - indicates residues forming contacts  by their side chain
       (including CA atoms)
Residues in contact with ASP 68 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65B  GLY*     3.5     9.9    -      -       -      +
     67B  GLU*     1.3    75.2    -      -       -      +
     69B  ALA*     1.3    74.9    +      -       -      +
     70B  GLY*     2.9    23.8    +      -       -      -
     71B  ASP*     2.9    31.7    +      -       -      +
     72B  VAL*     3.2    11.3    +      -       -      +
    146B  ARG*     3.8    15.1    +      -       -      +
    250B  LEU*     4.5     2.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 69 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     67B  GLU      4.2     0.6    +      -       -      -
     68B  ASP*     1.3    78.1    +      -       -      +
     70B  GLY*     1.3    54.0    +      -       -      +
     72B  VAL*     2.9     4.9    +      -       -      +
     73B  GLN*     2.7    37.4    +      -       +      +
    250B  LEU*     4.5     9.8    -      -       +      +
    251B  VAL*     4.1    20.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 70 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     68B  ASP*     2.9    16.2    +      -       -      -
     69B  ALA*     1.3    78.1    -      -       -      +
     71B  ASP*     1.3    62.4    +      -       -      -
     73B  GLN*     3.4     5.5    +      -       -      +
     74B  GLN*     2.9    26.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 71 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     67B  GLU      5.2     0.2    -      -       -      -
     68B  ASP*     2.9    35.2    +      -       -      +
     70B  GLY*     1.3    71.8    -      -       -      +
     72B  VAL*     1.3    58.7    -      -       +      +
     74B  GLN*     3.2    10.6    +      -       -      +
     75B  PHE*     2.8    28.9    +      -       -      +
    143B  GLN      5.1     6.5    -      -       -      +
    146B  ARG*     2.9    48.8    +      -       +      +
    147B  GLY*     3.7    25.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 72 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     67B  GLU*     4.2    18.2    -      -       +      -
     68B  ASP      3.2    11.4    +      -       -      +
     69B  ALA      2.9     9.7    +      -       -      +
     71B  ASP*     1.3    71.6    -      -       +      +
     73B  GLN*     1.3    61.5    +      -       -      +
     75B  PHE*     3.3     7.7    +      -       -      +
     76B  TYR*     2.9    51.5    +      -       +      -
    147B  GLY*     5.0     3.6    -      -       -      +
    245B  LEU*     3.8    33.4    -      -       +      -
    248B  GLU*     4.7     3.1    -      -       -      +
    250B  LEU*     4.8     3.4    -      -       +      -
    251B  VAL*     3.5    27.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 73 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     69B  ALA*     2.7    22.1    +      -       +      +
     70B  GLY*     4.0     4.5    -      -       -      +
     72B  VAL*     1.3    73.1    -      -       -      +
     74B  GLN*     1.3    56.1    +      -       -      +
     76B  TYR*     3.6     9.5    +      -       -      +
     77B  ASP*     3.0    64.9    +      -       -      +
    251B  VAL*     3.5    26.4    -      -       +      +
    252B  PRO      5.3     0.3    -      -       -      +
    254B  PRO*     5.7     2.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 74 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     55B  LYS*     4.1    23.4    -      -       -      +
     70B  GLY      2.9    19.3    +      -       -      +
     71B  ASP*     3.4     8.0    -      -       -      +
     73B  GLN*     1.3    73.7    -      -       -      +
     75B  PHE*     1.3    59.3    +      -       -      +
     77B  ASP*     2.9     7.3    +      -       +      -
     78B  LEU*     2.7    52.9    +      -       +      +
    137B  LEU*     5.0     0.4    -      -       -      +
    139B  LEU*     3.6    28.5    -      -       -      +
    143B  GLN*     3.9    18.7    -      -       -      +
    144B  CYS*     5.3     1.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 75 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     71B  ASP      2.8    16.1    +      -       -      +
     72B  VAL*     3.4     9.9    -      -       -      +
     74B  GLN*     1.3    74.6    -      -       -      +
     76B  TYR*     1.3    90.8    -      +       -      +
     78B  LEU*     3.3     3.8    +      -       -      +
     79B  LEU*     3.1    40.4    +      -       +      +
    147B  GLY*     3.8    20.6    -      -       -      +
    148B  PHE*     3.7    53.7    -      +       -      -
    151B  TRP*     4.0    17.3    -      +       -      -
    241B  ARG*     4.1    14.8    -      -       +      -
    242B  ILE*     4.2    11.4    -      -       +      -
    245B  LEU*     3.6    23.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 76 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     72B  VAL*     2.9    35.9    +      -       +      +
     73B  GLN*     4.0     9.9    -      -       -      +
     75B  PHE*     1.3    99.0    -      +       -      +
     77B  ASP*     1.3    57.6    +      -       -      +
     79B  LEU*     3.2    12.3    +      -       +      +
     80B  SER*     2.8    32.4    +      -       -      -
    242B  ILE*     4.2    12.7    -      -       +      +
    245B  LEU*     3.6    26.2    -      -       +      +
    246B  LYS*     4.3     3.8    -      -       -      +
    251B  VAL*     3.3    27.3    +      -       +      -
    252B  PRO      4.0     5.2    -      -       -      -
    253B  PRO*     3.5    40.9    -      -       +      +
    254B  PRO*     3.7    23.2    -      -       +      +
    257B  ILE*     4.5     9.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 77 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     73B  GLN*     3.0    51.9    +      -       -      +
     74B  GLN*     2.9     8.1    +      -       -      +
     76B  TYR*     1.3    73.2    -      -       -      +
     78B  LEU*     1.3    72.3    +      -       +      +
     80B  SER*     4.0     6.7    +      -       -      +
     81B  GLY*     2.9    22.5    +      -       -      -
    254B  PRO*     6.1     0.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 78 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     55B  LYS*     6.1     0.7    -      -       -      +
     74B  GLN*     2.7    53.6    +      -       +      +
     75B  PHE      3.6     3.8    -      -       -      +
     77B  ASP*     1.3    76.1    -      -       +      +
     79B  LEU*     1.3    63.5    +      -       -      +
     81B  GLY*     3.5     6.9    +      -       -      -
     82B  SER*     3.7     7.8    +      -       -      -
    116B  PHE*     3.9    12.5    -      -       +      -
    133B  PHE*     3.9    39.7    -      -       +      +
    134B  CYS*     5.9     0.3    -      -       -      -
    137B  LEU*     4.2    20.6    -      -       +      -
    139B  LEU*     4.3     5.4    -      -       +      -
    144B  CYS*     4.9     1.1    -      -       -      -
    148B  PHE*     3.8    28.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 79 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     75B  PHE*     3.1    45.9    +      -       +      +
     76B  TYR*     3.3    11.9    -      -       +      +
     77B  ASP      3.1     0.2    -      -       -      -
     78B  LEU*     1.3    74.3    -      -       -      +
     80B  SER*     1.3    65.9    +      -       -      +
     82B  SER*     3.2    11.3    +      -       -      -
     83B  LEU      3.8     0.7    +      -       -      -
    112B  PHE*     3.3    33.0    -      -       +      -
    113B  LEU*     4.6    11.9    -      -       +      -
    116B  PHE*     3.6    40.4    -      -       +      -
    148B  PHE*     5.2     0.9    -      -       +      -
    151B  TRP*     4.8     7.6    -      -       +      -
    242B  ILE*     4.4     9.6    -      -       +      -
    257B  ILE*     4.1    26.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 80 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     76B  TYR      2.8    15.9    +      -       -      -
     77B  ASP*     4.0     8.2    +      -       -      -
     79B  LEU*     1.3    72.9    -      -       -      +
     81B  GLY*     1.3    64.8    +      -       -      +
     82B  SER      2.9     1.4    +      -       -      -
     83B  LEU*     3.0    35.5    -      -       -      +
     84B  GLU*     4.1     2.1    +      -       -      +
    254B  PRO*     3.2    34.0    -      -       -      +
    257B  ILE*     3.8     4.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 81 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     77B  ASP      2.9    18.0    +      -       -      -
     78B  LEU*     3.9     3.8    -      -       -      -
     79B  LEU      3.2     0.8    -      -       -      -
     80B  SER*     1.3    77.0    -      -       -      +
     82B  SER*     1.3    58.0    +      -       -      +
     83B  LEU      3.5     0.5    +      -       -      -
     84B  GLU*     4.3     4.2    +      -       -      +
     85B  VAL*     3.9    18.5    +      -       -      +
    134B  CYS*     4.1     7.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with SER 82 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     78B  LEU      3.7     3.8    +      -       -      -
     79B  LEU      3.2    10.4    +      -       -      -
     80B  SER      3.1     0.8    -      -       -      -
     81B  GLY*     1.3    76.1    -      -       -      +
     83B  LEU*     1.3    54.1    +      -       -      +
     84B  GLU      3.5     0.4    -      -       -      -
     85B  VAL*     3.2     2.3    +      -       -      +
     86B  ILE*     2.6    43.0    +      -       -      +
    112B  PHE*     4.1     7.0    -      -       -      -
    116B  PHE*     3.7    26.6    -      -       -      -
    123B  ARG*     5.6     0.3    +      -       -      -
    134B  CYS*     3.4    16.8    +      -       -      -
    302B   NA      2.8    22.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 83 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     79B  LEU      3.8     1.4    +      -       -      -
     80B  SER*     3.0    33.9    -      -       -      +
     82B  SER*     1.3    73.4    -      -       -      +
     84B  GLU*     1.3    57.5    +      -       +      +
     86B  ILE*     3.8     1.7    -      -       -      +
     87B  ARG*     2.8    59.5    +      -       -      +
    112B  PHE*     4.0    22.4    -      -       +      -
    254B  PRO*     6.4     0.2    -      -       +      -
    256B  ILE*     4.0    31.0    -      -       +      -
    257B  ILE*     4.0    13.0    -      -       +      -
    260B  ILE*     3.9    27.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 84 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     80B  SER      4.1     2.3    +      -       -      +
     81B  GLY      4.3     4.7    +      -       -      +
     83B  LEU*     1.3    79.5    -      -       +      +
     85B  VAL*     1.3    64.6    +      -       +      +
     87B  ARG*     3.5    31.0    +      -       -      +
     88B  LYS*     3.1    48.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 85 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     44B  SER*     3.1    35.0    -      -       -      +
     81B  GLY      3.9    13.0    +      -       -      +
     82B  SER      3.2     9.7    +      -       -      +
     83B  LEU      3.1     1.0    -      -       -      -
     84B  GLU*     1.3    77.7    -      -       +      +
     86B  ILE*     1.3    61.3    +      -       -      +
     88B  LYS*     3.3     9.5    +      -       +      +
     89B  TRP*     2.9    25.8    +      -       -      +
    119B  ARG*     3.5    13.7    -      -       -      +
    134B  CYS*     4.1    18.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 86 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     82B  SER*     2.6    30.7    +      -       -      +
     83B  LEU*     4.0     3.1    -      -       -      +
     85B  VAL*     1.3    72.1    -      -       -      +
     87B  ARG*     1.3    57.1    +      -       -      +
     89B  TRP*     3.4    13.6    +      -       +      +
     90B  ALA*     3.0    27.0    +      -       -      +
    108B  LEU*     3.8    13.9    -      -       +      -
    112B  PHE*     3.8    30.7    -      -       +      -
    115B  LEU*     3.4    48.7    -      -       +      -
    116B  PHE*     3.9     9.9    -      -       -      +
    119B  ARG*     3.9    20.2    -      -       -      +
    302B   NA      4.1     2.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 87 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     83B  LEU*     2.8    49.9    +      -       -      +
     84B  GLU*     3.5    30.3    +      -       -      +
     85B  VAL      3.2     0.2    -      -       -      -
     86B  ILE*     1.3    79.1    -      -       -      +
     88B  LYS*     1.3    60.3    +      -       +      +
     90B  ALA*     3.6     2.8    +      -       -      +
     91B  GLU*     3.4    24.4    +      -       +      +
     96B  PHE*     5.7     0.2    -      -       -      -
    105B  ASP*     5.6     6.7    +      -       -      -
    108B  LEU*     4.1    31.7    -      -       +      +
    256B  ILE*     4.7    18.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 88 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     84B  GLU*     3.1    49.3    +      -       -      +
     85B  VAL*     4.0     7.4    -      -       +      +
     87B  ARG*     1.3    73.3    -      -       -      +
     89B  TRP*     1.3    67.2    +      -       -      +
     91B  GLU*     3.3    16.7    +      -       -      +
     92B  LYS*     3.6    24.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with TRP 89 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     37B  LEU*     4.8     2.4    +      -       +      +
     40B  ALA*     3.3    34.7    -      -       +      +
     41B  HIS*     3.6    20.8    +      -       -      +
     44B  SER*     3.8    19.0    -      -       -      -
     85B  VAL      2.9    17.3    +      -       -      +
     86B  ILE*     3.6    20.0    -      -       +      +
     88B  LYS*     1.3    77.8    -      -       -      +
     90B  ALA*     1.3    74.6    +      -       +      +
     92B  LYS*     3.0    22.4    +      -       -      +
     93B  ILE*     3.6    28.4    +      -       +      +
    115B  LEU*     3.9    24.5    -      -       +      -
    119B  ARG*     4.3    12.5    -      -       -      +
    173B  ALA      4.6     2.8    +      -       -      -
    176B  SER*     3.3    50.0    +      -       -      -
    177B  ALA*     3.5    13.9    -      -       +      -
    180B  LEU*     4.0     9.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 90 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     86B  ILE      3.0    18.1    +      -       -      +
     87B  ARG      3.7     6.1    -      -       -      +
     88B  LYS      3.3     0.2    -      -       -      -
     89B  TRP*     1.3    76.9    -      -       +      +
     91B  GLU*     1.3    57.7    +      -       -      +
     93B  ILE*     3.0    37.6    +      -       -      +
     96B  PHE*     3.4    34.2    -      -       +      +
    108B  LEU*     3.8    11.7    -      -       +      -
    180B  LEU*     3.8    15.0    -      -       +      -
----------------------------------------------------------
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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
----------------------------------------------------------
     87B  ARG*     3.4    13.9    +      -       +      +
     88B  LYS*     3.3    13.1    +      -       -      +
     89B  TRP      3.2     0.4    -      -       -      -
     90B  ALA*     1.3    79.4    -      -       -      +
     92B  LYS*     1.3    61.3    +      -       +      +
     93B  ILE      3.3     4.7    +      -       -      +
     96B  PHE*     3.8    11.7    -      -       -      -
     97B  ALA*     3.1    32.8    -      -       -      +
    104B  GLN*     3.0    25.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 92 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     36B  SER*     4.6     1.4    -      -       -      +
     39B  ARG*     3.5    36.6    +      -       -      +
     40B  ALA*     3.6    26.6    +      -       +      +
     43B  ASP*     4.0    25.4    +      -       +      +
     88B  LYS*     3.6    21.9    +      -       -      +
     89B  TRP*     3.0    11.8    +      -       -      +
     91B  GLU*     1.3    78.7    -      -       +      +
     93B  ILE*     1.3    64.0    +      -       -      +
     94B  PRO*     3.2    10.9    -      -       -      +
----------------------------------------------------------
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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