Contacts of the helix formed by residues 39 - 69 (chain C) in PDB entry 2VT4


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 GLN 39 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     40C  TRP*     1.3    65.9    +      -       -      +
     41C  GLU*     4.3    16.0    -      -       +      +
     42C  ALA*     3.0    35.3    +      -       +      +
     43C  GLY      3.8     3.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with TRP 40 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     39C  GLN*     1.3    71.1    -      -       -      +
     41C  GLU*     1.3    65.8    +      -       +      +
     42C  ALA      3.3     0.3    +      -       -      -
     43C  GLY*     3.6     2.1    +      -       -      +
     44C  MET*     3.1    54.9    +      -       +      +
    102C  VAL*     4.2    13.2    -      -       +      -
    103C  VAL*     3.5    36.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 41 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     39C  GLN*     3.1    15.5    -      -       +      +
     40C  TRP*     1.3    90.6    -      -       +      +
     42C  ALA*     1.3    56.6    +      -       -      +
     44C  MET*     3.6     2.3    +      -       -      +
     45C  SER*     2.8    39.5    +      -       -      +
    103C  VAL*     3.8    24.5    -      -       +      +
    104C  ARG*     5.2    12.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 42 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     39C  GLN*     3.0    30.0    +      -       +      +
     41C  GLU*     1.3    79.0    -      -       -      +
     43C  GLY*     1.3    63.3    +      -       -      +
     45C  SER*     3.6     6.8    +      -       -      -
     46C  LEU*     3.4    21.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 43 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     39C  GLN      3.8     4.2    +      -       -      -
     40C  TRP*     3.6     5.6    +      -       -      -
     41C  GLU      3.5     0.2    -      -       -      -
     42C  ALA*     1.3    76.6    -      -       -      +
     44C  MET*     1.3    67.6    +      -       -      +
     46C  LEU*     3.2     9.7    +      -       -      +
     47C  LEU*     3.1    25.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 44 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     40C  TRP*     3.1    63.5    +      -       +      +
     41C  GLU*     3.8     6.3    -      -       -      +
     42C  ALA      3.3     0.4    -      -       -      -
     43C  GLY*     1.3    75.5    -      -       -      +
     45C  SER*     1.3    56.2    +      -       -      +
     46C  LEU      3.0     4.5    -      -       -      -
     47C  LEU*     3.5     5.8    +      -       -      +
     48C  MET*     2.9    50.9    +      -       +      +
    102C  VAL*     5.9     1.3    -      -       +      -
    103C  VAL*     3.6    27.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 45 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41C  GLU*     2.8    31.3    +      -       -      +
     42C  ALA*     3.9     7.8    -      -       -      -
     44C  MET*     1.3    76.2    -      -       -      +
     46C  LEU*     1.3    59.5    +      -       -      +
     48C  MET*     4.3     5.8    -      -       -      -
     49C  ALA*     3.0    27.4    +      -       -      +
    103C  VAL*     4.9     7.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 46 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     42C  ALA      3.4    13.1    +      -       -      +
     43C  GLY*     3.2    13.9    +      -       -      +
     44C  MET      3.0     0.6    -      -       -      -
     45C  SER*     1.3    77.7    -      -       -      +
     47C  LEU*     1.3    68.9    +      -       +      +
     48C  MET      3.2     1.3    -      -       -      -
     49C  ALA*     3.3     5.0    +      -       +      +
     50C  LEU*     2.9    33.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 47 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     43C  GLY      3.1    13.3    +      -       -      +
     44C  MET*     4.4     6.5    -      -       -      +
     46C  LEU*     1.3    82.8    -      -       +      +
     48C  MET*     1.3    69.5    +      -       +      +
     50C  LEU*     3.0    23.7    +      -       +      +
     51C  VAL*     3.0    30.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with MET 48 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     44C  MET*     2.9    51.7    +      -       +      +
     45C  SER*     4.3     4.9    -      -       -      -
     47C  LEU*     1.3    80.2    -      -       +      +
     49C  ALA*     1.3    63.7    +      -       -      +
     51C  VAL*     2.9    28.2    -      -       -      +
     52C  VAL*     3.1     9.9    +      -       +      +
     95C  VAL*     4.9     4.3    -      -       +      -
     99C  ALA*     3.1    32.5    -      -       +      +
    102C  VAL*     5.2     7.9    -      -       +      -
    103C  VAL*     4.5     9.0    -      -       +      -
    330C  TRP*     3.6    35.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 49 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45C  SER      3.0    22.6    +      -       -      +
     46C  LEU*     3.7     7.0    -      -       +      +
     48C  MET*     1.3    78.8    -      -       -      +
     50C  LEU*     1.3    60.3    +      -       -      +
     52C  VAL*     3.7     9.3    +      -       -      +
     53C  LEU*     3.3    19.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 50 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46C  LEU*     2.9    20.5    +      -       +      +
     47C  LEU*     3.2    27.6    -      -       +      +
     48C  MET      3.0     0.4    -      -       -      -
     49C  ALA*     1.3    76.2    -      -       -      +
     51C  VAL*     1.3    68.0    +      -       +      +
     53C  LEU*     3.1    19.6    +      -       +      +
     54C  LEU*     3.0    28.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 51 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     47C  LEU*     3.0    14.5    +      -       +      +
     48C  MET*     2.9    27.6    -      -       -      +
     50C  LEU*     1.3    73.9    -      -       +      +
     52C  VAL*     1.3    80.0    -      -       -      +
     53C  LEU      2.9     0.7    +      -       -      -
     54C  LEU*     3.0    14.3    +      -       +      +
     55C  ILE*     2.9    36.5    +      -       +      +
     95C  VAL*     4.2    18.8    -      -       +      -
    330C  TRP*     5.0     5.4    -      -       +      -
    337C  ALA*     6.2     0.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 52 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48C  MET*     3.1    15.4    +      -       +      +
     49C  ALA*     3.8     8.7    -      -       -      +
     51C  VAL*     1.3    82.7    -      -       -      +
     53C  LEU*     1.3    56.6    +      -       -      +
     55C  ILE*     4.0     5.3    -      -       -      +
     56C  VAL*     2.9    43.0    +      -       +      +
     91C  GLY      3.4    23.6    -      -       -      +
     92C  LEU*     5.7     1.3    -      -       +      -
     95C  VAL*     3.6    26.7    -      -       +      -
     96C  PRO*     4.2    13.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 53 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     49C  ALA      3.3    12.1    +      -       -      +
     50C  LEU*     3.1    23.5    +      -       +      +
     52C  VAL*     1.3    78.8    -      -       -      +
     54C  LEU*     1.3    62.1    +      -       +      +
     56C  VAL*     4.8     2.7    -      -       +      -
     57C  ALA*     2.8    47.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 54 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     50C  LEU*     3.0    19.0    +      -       +      +
     51C  VAL*     3.0    15.8    +      -       +      +
     53C  LEU*     1.3    77.3    -      -       +      +
     55C  ILE*     1.3    64.6    +      -       -      +
     57C  ALA*     5.0     1.3    -      -       -      -
     58C  GLY*     2.8    25.8    +      -       -      -
    337C  ALA*     4.1    21.3    -      -       +      +
    340C  PRO*     5.5     0.3    -      -       -      +
    341C  ILE*     5.1    19.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 55 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     51C  VAL*     2.9    28.7    +      -       +      +
     52C  VAL*     4.0     4.0    -      -       -      +
     54C  LEU*     1.3    75.6    -      -       -      +
     56C  VAL*     1.3    62.8    +      -       +      +
     59C  ASN*     3.0    33.6    +      -       -      +
     87C  ASP      3.3    26.9    -      -       -      +
     88C  LEU*     4.4     0.4    -      -       -      +
     90C  VAL*     4.8     0.2    -      -       +      -
     91C  GLY*     3.5    22.4    -      -       -      +
     95C  VAL*     4.4    16.8    -      -       +      -
    333C  TYR      4.2     9.4    -      -       -      +
    334C  ALA*     5.4     2.0    -      -       -      -
    336C  SER*     3.8    24.5    -      -       -      +
    337C  ALA*     3.4    28.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 56 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     52C  VAL*     2.9    34.7    +      -       +      +
     53C  LEU*     4.3     2.7    -      -       -      +
     55C  ILE*     1.3    71.9    -      -       -      +
     57C  ALA*     1.3    66.1    +      -       -      +
     60C  VAL*     3.1    36.9    +      -       +      +
     88C  LEU*     3.8     8.3    -      -       +      +
     91C  GLY*     3.8    20.2    -      -       -      +
     92C  LEU*     3.6    34.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 57 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     53C  LEU*     2.8    35.1    +      -       +      +
     54C  LEU*     4.0     1.8    -      -       -      +
     56C  VAL*     1.3    74.3    -      -       -      +
     58C  GLY*     1.3    62.1    +      -       -      +
     60C  VAL*     3.3     4.8    +      -       -      +
     61C  LEU*     3.0    30.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 58 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     54C  LEU      2.8    19.8    +      -       -      -
     57C  ALA*     1.3    74.9    -      -       -      +
     59C  ASN*     1.3    55.4    +      -       -      +
     61C  LEU*     3.3    11.4    -      -       -      +
     62C  VAL*     3.2    29.8    +      -       -      +
    340C  PRO*     3.2    26.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 59 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     55C  ILE*     3.0    26.6    +      -       -      +
     58C  GLY*     1.3    74.6    -      -       -      +
     60C  VAL*     1.3    64.6    +      -       -      +
     62C  VAL*     3.7     7.1    +      -       -      +
     63C  ILE*     3.3    29.8    +      -       -      +
     84C  ALA*     3.5    28.6    -      -       +      +
     87C  ASP*     3.5    21.4    -      -       +      +
     88C  LEU*     3.9    13.9    -      -       +      -
    336C  SER      2.9    28.3    +      -       -      -
    339C  ASN*     4.8     2.3    -      -       -      +
    340C  PRO*     3.8    18.1    -      -       -      +
    343C  TYR*     6.0     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 60 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     56C  VAL*     3.1    30.8    +      -       +      +
     57C  ALA*     3.9     4.7    -      -       -      +
     59C  ASN*     1.3    76.0    -      -       -      +
     61C  LEU*     1.3    62.7    +      -       +      +
     63C  ILE*     3.9     5.6    -      -       -      +
     64C  ALA*     2.9    34.1    +      -       +      +
     88C  LEU*     3.7    25.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 61 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     57C  ALA      3.0    19.4    +      -       -      +
     58C  GLY*     3.3    11.4    -      -       -      +
     60C  VAL*     1.3    77.9    -      -       +      +
     62C  VAL*     1.3    60.2    +      -       +      +
     64C  ALA*     3.8     4.6    -      -       +      +
     65C  ALA*     2.8    32.7    +      -       +      +
    340C  PRO*     6.3     1.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 62 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     58C  GLY      3.2    15.1    +      -       -      +
     59C  ASN*     3.8     9.6    -      -       -      +
     60C  VAL      3.3     0.2    -      -       -      -
     61C  LEU*     1.3    76.4    -      -       +      +
     63C  ILE*     1.3    65.3    +      -       -      +
     64C  ALA      3.1     0.9    +      -       -      -
     65C  ALA*     3.1     5.3    +      -       -      +
     66C  ILE*     3.1    42.0    +      -       +      +
     80C  ILE*     4.1    17.7    -      -       +      +
     81C  THR*     5.3     0.4    -      -       -      -
     84C  ALA*     4.1    13.5    -      -       +      -
    340C  PRO*     4.1    14.4    -      -       +      -
    343C  TYR*     3.7    29.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 63 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     59C  ASN      3.3    20.2    +      -       -      +
     60C  VAL*     3.9     5.2    -      -       -      +
     62C  VAL*     1.3    80.7    -      -       -      +
     64C  ALA*     1.3    58.2    +      -       -      +
     66C  ILE*     3.8     2.5    +      -       -      +
     67C  GLY*     3.2    22.3    +      -       -      -
     81C  THR*     3.8    27.0    +      -       +      +
     84C  ALA*     3.7    23.3    -      -       +      -
     85C  CYS*     4.0    22.9    -      -       -      +
     88C  LEU*     4.2    20.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 64 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     60C  VAL*     2.9    23.3    +      -       +      +
     61C  LEU*     3.9     6.1    -      -       +      +
     63C  ILE*     1.3    78.9    -      -       +      +
     65C  ALA*     1.3    60.0    +      -       -      +
     67C  GLY*     3.2     2.5    +      -       -      -
     68C  SER*     2.8    35.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 65 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     61C  LEU*     2.8    22.2    +      -       +      +
     62C  VAL*     3.1     5.4    +      -       -      +
     64C  ALA*     1.3    73.2    -      -       -      +
     66C  ILE*     1.3    64.6    +      -       +      +
     68C  SER*     3.1    14.6    +      -       -      -
     69C  THR*     3.2    20.0    +      -       -      -
     72C  LEU*     3.8    18.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 66 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     62C  VAL*     3.1    32.2    +      -       +      +
     63C  ILE      4.2     2.9    -      -       -      +
     65C  ALA*     1.3    76.1    -      -       +      +
     67C  GLY*     1.3    59.3    +      -       -      +
     69C  THR      2.9    21.0    -      -       -      +
     72C  LEU*     4.2    25.6    -      -       +      +
     73C  GLN*     3.4    26.5    -      -       +      +
     77C  ASN*     3.5    43.3    -      -       +      +
     78C  LEU*     5.5     4.0    -      -       +      -
     80C  ILE*     4.2     8.3    -      -       +      -
     81C  THR*     3.6    18.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 67 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63C  ILE      3.2    17.0    +      -       -      -
     64C  ALA*     3.2     4.5    +      -       -      -
     66C  ILE*     1.3    79.1    -      -       -      +
     68C  SER*     1.3    61.4    +      -       -      +
     69C  THR      5.0     0.3    -      -       -      -
     70C  GLN*     6.0     0.2    -      -       -      +
     73C  GLN*     4.4    13.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 68 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     64C  ALA*     2.8    23.9    +      -       -      +
     65C  ALA*     3.1     8.3    +      -       -      -
     67C  GLY*     1.3    79.6    -      -       -      +
     69C  THR*     1.3    68.7    +      -       -      +
     70C  GLN*     3.6     8.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 69 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65C  ALA      3.2     8.9    +      -       -      -
     66C  ILE      2.9    24.0    -      -       -      +
     67C  GLY      5.0     0.2    -      -       -      -
     68C  SER*     1.3    77.8    -      -       -      +
     70C  GLN*     1.3    58.8    +      -       -      +
     71C  ARG*     3.3    34.3    -      -       +      +
     72C  LEU*     3.6    22.3    +      -       +      +
     73C  GLN*     3.3     9.2    +      -       -      +
----------------------------------------------------------
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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