Contacts of the helix formed by residues 41 - 69 (chain D) 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 GLU 41 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     42D  ALA*     1.3    63.6    +      -       -      +
     43D  GLY*     3.3     6.0    -      -       -      +
     44D  MET*     3.9    18.8    -      -       -      +
     45D  SER*     2.7    39.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 42 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41D  GLU*     1.3    76.7    -      -       -      +
     43D  GLY*     1.3    65.0    +      -       -      +
     45D  SER*     3.2     7.1    +      -       -      -
     46D  LEU*     2.9    24.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 43 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41D  GLU      3.3     3.8    -      -       -      +
     42D  ALA*     1.3    77.1    -      -       -      +
     44D  MET*     1.3    70.6    +      -       -      +
     46D  LEU*     3.1     7.7    +      -       -      +
     47D  LEU*     3.0    22.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 44 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41D  GLU*     3.7    18.2    +      -       -      +
     42D  ALA      3.4     0.4    -      -       -      -
     43D  GLY*     1.3    78.4    -      -       -      +
     45D  SER*     1.3    63.9    +      -       -      +
     47D  LEU*     3.3    24.2    +      -       +      +
     48D  MET*     3.0    33.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 45 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41D  GLU*     2.7    28.9    +      -       -      +
     42D  ALA*     3.5     6.5    -      -       -      -
     44D  MET*     1.3    77.2    -      -       -      +
     46D  LEU*     1.3    62.3    -      -       -      +
     48D  MET*     3.4     6.2    +      -       -      +
     49D  ALA*     3.1    22.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 46 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     42D  ALA      2.9    16.7    +      -       -      +
     43D  GLY*     3.7     5.2    -      -       -      +
     45D  SER*     1.3    73.2    -      -       -      +
     47D  LEU*     1.3    67.9    +      -       -      +
     49D  ALA*     3.0    19.8    +      -       +      +
     50D  LEU*     3.0    39.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 47 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     43D  GLY      3.0    12.0    +      -       -      +
     44D  MET*     3.6    28.3    -      -       +      +
     46D  LEU*     1.3    76.0    -      -       -      +
     48D  MET*     1.3    75.6    +      -       +      +
     50D  LEU*     2.9     8.3    +      -       -      -
     51D  VAL*     2.9    33.1    +      -       +      +
     54D  LEU*     3.7    26.5    -      -       +      -
    334D  ALA*     4.4    14.8    -      -       +      -
    337D  ALA*     5.6     3.8    -      -       +      -
    338D  MET*     5.9     4.9    -      -       +      -
    341D  ILE*     6.5     0.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 48 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     44D  MET*     3.0    27.1    +      -       +      +
     45D  SER*     3.8     6.7    -      -       -      +
     47D  LEU*     1.3   103.6    -      -       +      +
     49D  ALA*     1.3    60.3    +      -       -      +
     51D  VAL*     3.1    35.0    +      -       +      +
    330D  TRP*     4.3    34.1    -      -       +      +
    334D  ALA*     4.5     9.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 49 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45D  SER      3.1    12.0    +      -       -      +
     46D  LEU*     3.0    16.5    +      -       +      +
     48D  MET*     1.3    74.2    -      -       -      +
     50D  LEU*     1.3    64.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 50 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46D  LEU*     3.0    44.4    +      -       +      +
     47D  LEU*     2.9     6.5    +      -       -      +
     49D  ALA*     1.3    85.8    -      -       +      +
     51D  VAL*     1.3    52.4    +      -       -      +
     52D  VAL      3.5     2.2    -      -       -      -
     53D  LEU*     3.2    31.1    +      -       +      +
     54D  LEU*     2.7    54.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 51 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     47D  LEU*     2.9    18.0    +      -       +      +
     48D  MET*     3.1    44.8    +      -       +      +
     50D  LEU*     1.3    68.8    -      -       -      +
     52D  VAL*     1.3    60.8    +      -       +      +
     54D  LEU*     4.1     4.9    -      -       -      -
     55D  ILE*     2.7    51.6    +      -       +      +
     95D  VAL*     5.0    12.1    -      -       +      -
    330D  TRP*     5.0     8.7    -      -       +      -
    333D  TYR*     5.4     1.3    -      -       +      -
    334D  ALA*     4.3    22.7    -      -       +      +
    337D  ALA*     4.5     9.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 52 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     50D  LEU      3.5     0.8    -      -       -      -
     51D  VAL*     1.3    77.7    -      -       +      +
     53D  LEU*     1.3    64.9    +      -       -      +
     55D  ILE*     4.1     3.7    -      -       -      +
     56D  VAL*     3.1    30.7    +      -       +      +
     91D  GLY      3.8    19.7    -      -       -      +
     92D  LEU*     6.0     1.6    -      -       +      -
     95D  VAL*     3.8    27.1    -      -       +      -
     96D  PRO*     4.6    14.8    -      -       +      -
     99D  ALA*     6.1     2.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 53 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     50D  LEU*     3.2    32.0    +      -       +      +
     52D  VAL*     1.3    80.0    -      -       -      +
     54D  LEU*     1.3    64.1    +      -       +      +
     56D  VAL*     5.0     1.1    -      -       -      -
     57D  ALA*     2.9    49.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 54 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     47D  LEU*     3.7    29.6    -      -       +      -
     50D  LEU*     2.7    44.4    +      -       +      +
     51D  VAL*     3.6     4.5    -      -       -      +
     53D  LEU*     1.3    79.8    -      -       +      +
     55D  ILE*     1.3    59.4    +      -       -      +
     57D  ALA*     5.4     0.7    -      -       -      -
     58D  GLY*     3.5    18.5    +      -       -      +
     59D  ASN*     4.7     0.7    +      -       -      -
    337D  ALA*     3.8    23.9    -      -       +      +
    340D  PRO*     4.8     1.0    -      -       -      +
    341D  ILE*     5.5    15.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 55 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     51D  VAL*     2.7    37.6    +      -       +      +
     52D  VAL*     4.1     2.9    -      -       -      +
     54D  LEU*     1.3    71.6    -      -       -      +
     56D  VAL*     1.3    60.0    +      -       -      +
     59D  ASN*     2.6    41.4    +      -       -      +
     87D  ASP      3.2    27.1    -      -       -      +
     90D  VAL*     4.8     0.9    -      -       +      -
     91D  GLY*     3.7    19.3    -      -       -      -
     95D  VAL*     4.7    14.4    -      -       +      -
    333D  TYR*     3.8    11.7    -      -       +      +
    336D  SER*     3.4    42.4    -      -       -      +
    337D  ALA*     3.4     7.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 56 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     52D  VAL*     3.1    24.4    +      -       +      +
     53D  LEU*     4.2     1.6    -      -       -      +
     55D  ILE*     1.3    75.1    -      -       -      +
     57D  ALA*     1.3    62.6    +      -       +      +
     60D  VAL*     2.9    48.2    +      -       +      +
     88D  LEU*     3.9    12.5    -      -       +      +
     91D  GLY*     3.7    26.9    -      -       -      +
     92D  LEU*     3.8    30.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 57 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     53D  LEU*     2.9    37.0    +      -       +      +
     54D  LEU*     5.4     0.4    -      -       -      -
     56D  VAL*     1.3    76.9    -      -       -      +
     58D  GLY*     1.3    58.8    +      -       -      +
     60D  VAL*     3.8     6.0    -      -       -      +
     61D  LEU*     2.9    35.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 58 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     54D  LEU*     3.5    19.0    +      -       -      +
     56D  VAL      3.3     0.4    -      -       -      -
     57D  ALA*     1.3    80.9    -      -       -      +
     59D  ASN*     1.3    56.7    +      -       -      +
     61D  LEU*     3.5     9.2    +      -       -      +
     62D  VAL*     3.1    29.5    +      -       -      +
    340D  PRO*     3.4    19.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 59 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     55D  ILE*     2.6    30.7    +      -       -      +
     56D  VAL      4.3     0.7    -      -       -      +
     58D  GLY*     1.3    73.7    -      -       -      +
     60D  VAL*     1.3    67.5    +      -       -      +
     61D  LEU      3.0     1.3    -      -       -      -
     62D  VAL*     3.7     6.4    -      -       -      +
     63D  ILE*     3.0    30.1    +      -       -      +
     84D  ALA*     3.5    35.6    -      -       +      +
     87D  ASP*     3.6    20.9    -      -       +      +
     88D  LEU*     4.6     7.4    -      -       +      -
    336D  SER      2.9    26.1    +      -       -      -
    339D  ASN*     5.2     2.1    -      -       -      +
    340D  PRO*     3.9    15.9    -      -       -      +
    343D  TYR*     6.0     0.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 60 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     56D  VAL*     2.9    34.8    +      -       +      +
     57D  ALA*     3.8     7.0    -      -       -      +
     59D  ASN*     1.3    76.6    -      -       -      +
     61D  LEU*     1.3    62.7    +      -       +      +
     63D  ILE*     3.6    11.3    +      -       +      +
     64D  ALA*     3.1    28.3    +      -       +      +
     88D  LEU*     4.0    23.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 61 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     57D  ALA*     2.9    21.4    +      -       +      +
     58D  GLY*     3.5    10.3    -      -       -      +
     59D  ASN      3.0     0.4    -      -       -      -
     60D  VAL*     1.3    79.9    -      -       +      +
     62D  VAL*     1.3    59.9    +      -       -      +
     64D  ALA*     3.3     5.4    +      -       +      +
     65D  ALA*     2.9    30.3    +      -       -      +
    353D  PHE*     3.9    28.4    -      -       +      -
    356D  LEU*     4.1    24.2    -      -       +      +
    357D  LEU*     4.2    32.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 62 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     58D  GLY      3.1    18.6    +      -       -      +
     59D  ASN*     3.7    10.1    -      -       -      +
     61D  LEU*     1.3    75.0    -      -       -      +
     63D  ILE*     1.3    66.7    +      -       +      +
     65D  ALA*     3.4     2.8    +      -       -      +
     66D  ILE*     3.1    42.8    +      -       +      +
     80D  ILE*     4.0    15.9    -      -       +      +
     81D  THR*     5.7     0.2    -      -       -      -
     84D  ALA*     4.4    11.9    -      -       +      -
    340D  PRO*     3.9    15.9    -      -       +      -
    343D  TYR*     3.5    30.5    -      -       +      -
    349D  PHE*     4.4     4.9    -      -       +      -
    353D  PHE*     4.2    14.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 63 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     59D  ASN      3.0    19.5    +      -       -      +
     60D  VAL*     3.7     7.6    -      -       +      +
     62D  VAL*     1.3    79.4    -      -       -      +
     64D  ALA*     1.3    65.0    +      -       +      +
     66D  ILE*     3.4     6.3    +      -       -      +
     67D  GLY*     3.2    18.2    +      -       -      -
     81D  THR*     4.0    23.9    -      -       +      +
     84D  ALA*     4.2    15.3    -      -       +      +
     85D  CYS*     4.0    24.7    -      -       -      -
     88D  LEU*     4.3    20.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 64 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     60D  VAL*     3.1    20.3    +      -       +      +
     61D  LEU*     3.3     7.4    +      -       +      +
     63D  ILE*     1.3    76.1    -      -       +      +
     65D  ALA*     1.3    67.2    +      -       -      +
     67D  GLY*     3.0     4.1    +      -       -      +
     68D  SER*     3.0    27.6    +      -       -      +
    356D  LEU*     4.5    18.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 65 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     61D  LEU      2.9    18.3    +      -       -      +
     62D  VAL      3.8     3.8    -      -       -      +
     64D  ALA*     1.3    76.5    -      -       -      +
     66D  ILE*     1.3    62.5    -      -       -      +
     67D  GLY      3.1     0.9    +      -       -      -
     68D  SER*     3.1    12.4    +      -       -      -
     69D  THR*     3.3    19.9    +      -       -      -
     72D  LEU*     4.0    10.7    -      -       +      +
    349D  PHE*     4.3     4.3    -      -       +      -
    352D  ALA*     4.1    23.1    -      -       +      -
    353D  PHE*     4.2    13.9    -      -       +      -
    356D  LEU*     4.0    12.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 66 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     62D  VAL*     3.1    25.0    +      -       +      +
     63D  ILE*     3.9     4.7    -      -       -      +
     65D  ALA*     1.3    75.6    -      -       -      +
     67D  GLY*     1.3    57.2    +      -       -      +
     68D  SER      3.4     0.4    +      -       -      -
     69D  THR      3.9     3.9    -      -       -      +
     72D  LEU*     3.8    22.9    -      -       +      +
     73D  GLN*     3.1    27.6    +      -       +      +
     77D  ASN*     3.5    34.5    -      -       +      +
     78D  LEU*     5.7     2.9    -      -       +      -
     80D  ILE*     3.7    22.9    -      -       +      -
     81D  THR*     3.5    19.1    -      -       -      +
    349D  PHE*     4.0    18.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 67 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63D  ILE      3.2    10.7    +      -       -      -
     64D  ALA*     3.0     9.0    +      -       -      -
     65D  ALA      3.0     1.0    -      -       -      -
     66D  ILE*     1.3    78.8    -      -       -      +
     68D  SER*     1.3    60.0    +      -       -      +
     73D  GLN*     4.4    14.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 68 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     64D  ALA*     3.0    16.7    +      -       -      +
     65D  ALA*     3.1     5.1    +      -       -      -
     67D  GLY*     1.3    80.0    -      -       -      +
     69D  THR*     1.3    59.9    +      -       -      +
     70D  GLN*     2.8    31.9    +      -       -      +
    352D  ALA*     6.1     1.1    -      -       -      -
    355D  ARG*     6.2     1.6    -      -       -      -
    356D  LEU*     4.3    14.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 69 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65D  ALA      3.3     7.2    +      -       -      -
     66D  ILE      3.9     5.1    -      -       -      +
     68D  SER*     1.3    73.9    -      -       -      +
     70D  GLN*     1.3    53.8    +      -       -      +
     71D  ARG*     2.9    43.3    -      -       +      +
     72D  LEU*     2.6    48.0    +      -       +      +
     73D  GLN      3.4     2.8    +      -       -      -
    348D  ASP*     5.7     1.6    -      -       +      +
    352D  ALA*     3.8    22.3    -      -       -      +
    355D  ARG*     4.8    17.0    +      -       -      +
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


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

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

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