Contacts of the helix formed by residues 39 - 69 (chain B) 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 B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     40B  TRP*     1.3    55.8    +      -       -      +
     41B  GLU*     2.7    14.5    -      -       +      +
     42B  ALA*     2.7    43.1    +      -       +      +
     43B  GLY      4.0     1.4    +      -       -      -
    108D  LEU      3.5    21.7    +      -       -      -
    109D  TRP*     3.4    22.1    -      -       -      +
    110D  GLY*     4.1    12.2    -      -       -      +
    113D  LEU*     5.9     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with TRP 40 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     39B  GLN*     1.3    75.0    -      -       -      +
     41B  GLU*     1.3    64.0    +      -       +      +
     42B  ALA      3.1     0.8    +      -       -      -
     43B  GLY*     3.6     3.0    +      -       -      +
     44B  MET*     3.1    55.3    +      -       +      +
    102B  VAL*     4.2    13.2    -      -       +      -
    103B  VAL*     3.5    36.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 41 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     39B  GLN*     2.7    10.1    -      -       +      +
     40B  TRP*     1.3    90.1    -      -       +      +
     42B  ALA*     1.3    56.5    +      -       -      +
     44B  MET*     3.6     2.3    +      -       -      +
     45B  SER*     2.8    39.7    +      -       -      +
    103B  VAL*     3.8    24.1    -      -       +      +
    104B  ARG*     5.2     4.7    -      -       -      -
    110D  GLY*     3.6     9.3    -      -       -      -
    111D  SER*     3.1    40.4    +      -       -      -
    112D  PHE*     4.5     3.1    +      -       -      +
    196D  PRO*     3.5    26.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 42 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     39B  GLN*     2.7    36.3    +      -       +      +
     41B  GLU*     1.3    72.2    -      -       -      +
     43B  GLY*     1.3    61.9    +      -       -      +
     45B  SER*     3.6     7.2    +      -       -      -
     46B  LEU*     3.4    21.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 43 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     39B  GLN      4.0     2.4    +      -       -      -
     40B  TRP*     3.6     6.2    +      -       -      +
     41B  GLU      3.5     0.2    -      -       -      -
     42B  ALA*     1.3    75.9    -      -       -      +
     44B  MET*     1.3    67.2    +      -       -      +
     46B  LEU*     3.2    10.5    +      -       -      +
     47B  LEU*     3.1    25.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 44 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     40B  TRP*     3.1    62.6    +      -       +      +
     41B  GLU*     3.8     5.8    -      -       -      +
     42B  ALA      3.3     0.4    -      -       -      -
     43B  GLY*     1.3    75.3    -      -       -      +
     45B  SER*     1.3    56.6    +      -       -      +
     46B  LEU      3.0     4.0    -      -       -      -
     47B  LEU*     3.5     6.0    +      -       -      +
     48B  MET*     2.9    50.6    +      -       +      +
    102B  VAL*     5.9     1.3    -      -       +      -
    103B  VAL*     3.6    27.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 45 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41B  GLU*     2.8    31.8    +      -       -      +
     42B  ALA*     3.9     7.6    -      -       -      -
     44B  MET*     1.3    75.5    -      -       -      +
     46B  LEU*     1.3    59.1    +      -       -      +
     48B  MET*     4.3     6.5    -      -       -      -
     49B  ALA*     3.0    27.4    +      -       -      +
    103B  VAL*     4.9     7.1    -      -       -      +
    196D  PRO*     5.7     2.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 46 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     42B  ALA      3.4    12.7    +      -       -      +
     43B  GLY*     3.2    13.4    +      -       -      +
     44B  MET      3.0     1.0    -      -       -      -
     45B  SER*     1.3    78.4    -      -       -      +
     47B  LEU*     1.3    72.8    +      -       +      +
     48B  MET      3.2     1.1    -      -       -      -
     49B  ALA*     3.3     5.1    +      -       +      +
     50B  LEU*     3.0    28.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 47 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     43B  GLY      3.1    13.5    +      -       -      +
     44B  MET*     4.3     6.5    -      -       -      +
     46B  LEU*     1.3    83.2    -      -       +      +
     48B  MET*     1.3    69.0    +      -       +      +
     50B  LEU*     3.0    24.2    +      -       +      +
     51B  VAL*     3.0    30.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with MET 48 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     44B  MET*     2.9    51.7    +      -       +      +
     45B  SER*     4.3     5.4    -      -       -      -
     47B  LEU*     1.3    79.5    -      -       +      +
     49B  ALA*     1.3    64.0    +      -       -      +
     51B  VAL*     3.0    27.6    -      -       -      +
     52B  VAL*     3.1    10.1    +      -       +      +
     95B  VAL*     4.9     4.0    -      -       +      -
     99B  ALA*     3.1    32.8    -      -       +      +
    102B  VAL*     5.2     7.4    -      -       +      -
    103B  VAL*     4.5     9.0    -      -       +      -
    330B  TRP*     3.7    34.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 49 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45B  SER      3.0    22.0    +      -       -      +
     46B  LEU*     3.7     6.7    -      -       +      +
     48B  MET*     1.3    78.3    -      -       -      +
     50B  LEU*     1.3    61.1    +      -       -      +
     52B  VAL*     3.8    10.0    +      -       -      +
     53B  LEU*     3.3    19.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 50 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46B  LEU*     3.0    20.7    +      -       +      +
     47B  LEU*     3.2    28.7    -      -       +      +
     48B  MET      3.0     0.4    -      -       -      -
     49B  ALA*     1.3    76.7    -      -       -      +
     51B  VAL*     1.3    67.6    +      -       +      +
     53B  LEU*     3.1    19.4    +      -       +      +
     54B  LEU*     3.0    28.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 51 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     47B  LEU*     3.0    15.0    +      -       +      +
     48B  MET*     3.0    26.7    -      -       -      +
     50B  LEU*     1.3    75.5    -      -       +      +
     52B  VAL*     1.3    78.5    -      -       -      +
     53B  LEU      3.0     0.9    +      -       -      -
     54B  LEU*     3.0    15.3    +      -       +      +
     55B  ILE*     2.9    36.1    +      -       +      +
     95B  VAL*     4.2    19.1    -      -       +      -
    330B  TRP*     5.0     5.4    -      -       +      -
    337B  ALA*     6.2     0.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 52 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48B  MET*     3.1    16.2    +      -       +      +
     49B  ALA*     3.8     9.0    -      -       -      +
     51B  VAL*     1.3    82.3    -      -       -      +
     53B  LEU*     1.3    56.6    +      -       -      +
     55B  ILE*     4.1     5.6    -      -       -      +
     56B  VAL*     2.9    42.6    +      -       +      +
     91B  GLY      3.4    24.2    -      -       -      +
     92B  LEU*     5.7     1.1    -      -       +      -
     95B  VAL*     3.6    26.5    -      -       +      -
     96B  PRO*     4.2    12.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 53 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     49B  ALA      3.3    12.1    +      -       -      +
     50B  LEU*     3.1    23.3    +      -       +      +
     52B  VAL*     1.3    77.9    -      -       -      +
     54B  LEU*     1.3    62.5    +      -       +      +
     56B  VAL*     4.8     2.5    -      -       +      -
     57B  ALA*     2.8    48.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 54 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     50B  LEU*     3.0    18.6    +      -       +      +
     51B  VAL*     3.0    16.3    +      -       +      +
     53B  LEU*     1.3    76.3    -      -       +      +
     55B  ILE*     1.3    64.5    +      -       -      +
     57B  ALA*     5.0     1.3    -      -       -      -
     58B  GLY*     2.8    25.6    +      -       -      -
    337B  ALA*     4.1    21.5    -      -       +      +
    340B  PRO*     5.5     0.3    -      -       -      +
    341B  ILE*     5.1    19.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 55 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     51B  VAL*     2.9    28.1    +      -       +      +
     52B  VAL*     4.1     3.4    -      -       -      +
     54B  LEU*     1.3    75.8    -      -       -      +
     56B  VAL*     1.3    64.3    +      -       +      +
     59B  ASN*     3.0    33.4    +      -       -      +
     87B  ASP      3.3    26.5    -      -       -      +
     88B  LEU*     4.4     0.4    -      -       -      +
     90B  VAL*     4.8     0.2    -      -       +      -
     91B  GLY*     3.5    23.3    -      -       -      +
     95B  VAL*     4.4    16.6    -      -       +      -
    333B  TYR      4.2     9.6    -      -       -      +
    334B  ALA*     5.4     2.0    -      -       -      -
    336B  SER*     3.8    23.8    -      -       -      +
    337B  ALA*     3.4    28.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 56 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     52B  VAL*     2.9    34.4    +      -       +      +
     53B  LEU*     4.3     2.7    -      -       -      +
     55B  ILE*     1.3    71.2    -      -       -      +
     57B  ALA*     1.3    65.3    +      -       -      +
     60B  VAL*     3.1    36.6    +      -       +      +
     88B  LEU*     3.8     9.3    -      -       +      +
     91B  GLY*     3.8    20.4    -      -       -      +
     92B  LEU*     3.6    34.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 57 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     53B  LEU*     2.8    35.3    +      -       +      +
     54B  LEU*     4.1     1.8    -      -       -      +
     56B  VAL*     1.3    74.1    -      -       -      +
     58B  GLY*     1.3    62.0    +      -       -      +
     60B  VAL*     3.3     5.1    +      -       -      +
     61B  LEU*     3.0    30.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 58 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     54B  LEU      2.8    19.8    +      -       -      -
     57B  ALA*     1.3    74.5    -      -       -      +
     59B  ASN*     1.3    56.0    +      -       -      +
     61B  LEU*     3.3    11.2    -      -       -      +
     62B  VAL*     3.2    29.6    +      -       -      +
    340B  PRO*     3.2    26.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 59 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     55B  ILE*     3.0    26.7    +      -       -      +
     58B  GLY*     1.3    74.6    -      -       -      +
     60B  VAL*     1.3    65.0    +      -       -      +
     62B  VAL*     3.7     6.9    +      -       -      +
     63B  ILE*     3.3    29.7    +      -       -      +
     84B  ALA*     3.5    23.3    -      -       +      +
     87B  ASP*     3.5    26.2    -      -       +      +
     88B  LEU*     3.9    13.7    -      -       +      -
    336B  SER      2.9    28.1    +      -       -      -
    339B  ASN*     4.8     2.3    -      -       -      +
    340B  PRO*     3.8    18.5    -      -       -      +
    343B  TYR*     6.0     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 60 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     56B  VAL*     3.1    30.4    +      -       +      +
     57B  ALA*     3.9     4.7    -      -       -      +
     59B  ASN*     1.3    75.3    -      -       -      +
     61B  LEU*     1.3    62.3    +      -       +      +
     63B  ILE*     3.9     5.9    -      -       -      +
     64B  ALA*     2.9    34.0    +      -       +      +
     88B  LEU*     3.7    26.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 61 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     57B  ALA      3.0    19.2    +      -       -      +
     58B  GLY*     3.3    11.0    -      -       -      +
     60B  VAL*     1.3    78.3    -      -       +      +
     62B  VAL*     1.3    60.0    +      -       -      +
     64B  ALA*     3.8     4.2    -      -       +      +
     65B  ALA*     2.8    32.3    +      -       -      +
    340B  PRO*     6.3     1.1    -      -       +      -
    353B  PHE*     3.7    32.1    -      -       +      +
    356B  LEU*     4.3    26.1    -      -       +      +
    357B  LEU*     4.1    35.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 62 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     58B  GLY      3.2    15.8    +      -       -      +
     59B  ASN*     3.8    10.1    -      -       -      +
     60B  VAL      3.3     0.2    -      -       -      -
     61B  LEU*     1.3    75.5    -      -       -      +
     63B  ILE*     1.3    65.4    +      -       -      +
     64B  ALA      3.1     0.3    +      -       -      -
     65B  ALA*     3.1     6.2    +      -       -      +
     66B  ILE*     3.1    42.5    +      -       +      +
     80B  ILE*     4.1    17.7    -      -       +      +
     81B  THR*     5.3     0.4    -      -       -      -
     84B  ALA*     4.1    13.9    -      -       +      -
    340B  PRO*     4.1    14.1    -      -       +      -
    343B  TYR*     3.7    29.2    -      -       +      -
    349B  PHE*     5.6     4.0    -      -       +      -
    353B  PHE*     4.5     9.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 63 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     59B  ASN      3.3    19.7    +      -       -      +
     60B  VAL*     3.9     5.4    -      -       -      +
     62B  VAL*     1.3    80.0    -      -       -      +
     64B  ALA*     1.3    58.2    +      -       +      +
     66B  ILE*     3.8     2.1    +      -       -      +
     67B  GLY*     3.2    22.7    +      -       -      -
     81B  THR*     3.8    27.0    +      -       +      +
     84B  ALA*     3.7    22.4    -      -       +      -
     85B  CYS*     3.9    23.3    -      -       -      +
     88B  LEU*     4.2    20.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 64 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     60B  VAL*     2.9    23.1    +      -       +      +
     61B  LEU*     3.9     4.9    -      -       +      +
     63B  ILE*     1.3    78.3    -      -       +      +
     65B  ALA*     1.3    59.4    +      -       -      +
     67B  GLY*     3.2     2.5    +      -       -      -
     68B  SER*     2.8    34.5    +      -       -      +
    356B  LEU*     4.5    16.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 65 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     61B  LEU      2.8    22.3    +      -       -      +
     62B  VAL*     3.7     4.9    -      -       -      +
     64B  ALA*     1.3    72.2    -      -       -      +
     66B  ILE*     1.3    63.2    +      -       -      +
     68B  SER*     3.1    12.4    +      -       -      -
     69B  THR*     3.2    19.6    +      -       -      -
     72B  LEU*     3.8    19.1    -      -       +      +
    349B  PHE*     4.9     6.3    -      -       +      -
    352B  ALA*     4.1    17.9    -      -       +      +
    353B  PHE*     5.0     5.2    -      -       +      -
    356B  LEU*     4.1    14.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 66 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     62B  VAL*     3.1    32.0    +      -       +      +
     63B  ILE      4.2     2.9    -      -       -      +
     65B  ALA*     1.3    76.5    -      -       -      +
     67B  GLY*     1.3    59.1    +      -       -      +
     69B  THR      2.9    20.6    -      -       -      +
     72B  LEU*     4.1    17.7    -      -       +      +
     73B  GLN*     3.4    25.9    -      -       +      +
     77B  ASN*     3.5    39.7    -      -       +      +
     78B  LEU*     5.5     4.0    -      -       +      -
     80B  ILE*     4.2     8.3    -      -       +      -
     81B  THR*     3.6    18.2    -      -       -      +
    349B  PHE*     4.2    18.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 67 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63B  ILE      3.2    17.2    +      -       -      -
     64B  ALA*     3.2     4.7    +      -       -      -
     66B  ILE*     1.3    78.7    -      -       -      +
     68B  SER*     1.3    61.6    +      -       -      +
     69B  THR      5.0     0.3    -      -       -      -
     70B  GLN*     6.0     0.2    -      -       -      +
     73B  GLN*     4.4    13.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 68 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     64B  ALA*     2.8    23.2    +      -       -      +
     65B  ALA*     3.1     7.8    +      -       -      -
     67B  GLY*     1.3    79.4    -      -       -      +
     69B  THR*     1.3    67.6    +      -       -      +
     70B  GLN*     3.6     8.1    +      -       -      +
    356B  LEU*     4.0    17.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 69 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65B  ALA      3.2     8.9    +      -       -      -
     66B  ILE      2.9    20.8    -      -       -      +
     67B  GLY      5.0     0.2    -      -       -      -
     68B  SER*     1.3    76.4    -      -       -      +
     70B  GLN*     1.3    58.8    +      -       -      +
     71B  ARG*     3.3    34.3    -      -       +      +
     72B  LEU*     3.6    22.7    +      -       +      +
     73B  GLN*     3.3     8.9    +      -       -      -
    352B  ALA*     4.6     8.5    -      -       -      +
    355B  ARG*     5.1    13.9    +      -       -      +
----------------------------------------------------------
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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