Contacts of the helix formed by residues 79 - 103 (chain D) in PDB entry 4J4L


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 ASN 79 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     72D  GLY*     3.0    11.8    +      -       -      +
     77D  GLY      3.3     5.6    +      -       -      +
     78D  PHE*     1.3    73.1    -      -       -      +
     80D  GLU*     1.3    66.4    +      -       -      +
     81D  GLU*     3.1    19.8    +      -       -      +
     82D  THR*     3.2    31.6    +      -       -      +
     83D  CYS*     2.9    24.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 80 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     78D  PHE*     3.9    25.5    -      -       +      -
     79D  ASN*     1.3    71.3    +      -       -      +
     81D  GLU*     1.3    63.8    +      -       -      +
     83D  CYS*     4.0     1.5    -      -       -      +
     84D  LEU*     3.2    29.8    +      -       +      +
    129D  LYS*     5.2     8.0    +      -       -      +
    131D  LYS*     5.4     6.2    +      -       -      +
    184D  MET*     3.7    46.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 81 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     79D  ASN*     3.1    10.7    +      -       -      +
     80D  GLU*     1.3    84.6    -      -       -      +
     82D  THR*     1.3    68.8    +      -       +      +
     84D  LEU*     3.7     4.3    +      -       -      +
     85D  VAL*     3.5    24.9    +      -       +      +
    131D  LYS*     4.4    36.3    +      -       +      +
    132D  ASN*     4.8     9.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 82 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     70D  LYS      4.2     7.1    +      -       -      +
     71D  ASP*     2.7    29.9    +      -       -      +
     72D  GLY*     4.3     0.2    -      -       -      -
     79D  ASN*     3.2    30.4    +      -       -      +
     81D  GLU*     1.3    83.6    -      -       +      +
     83D  CYS*     1.3    57.2    +      -       -      +
     85D  VAL*     3.5     9.7    +      -       -      +
     86D  LYS*     3.0    25.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with CYS 83 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     71D  ASP      3.3     3.4    -      -       -      -
     72D  GLY      3.5     9.9    -      -       -      +
     73D  CYS*     2.1    51.8    -      -       -      -
     78D  PHE*     4.1     2.0    -      -       +      -
     79D  ASN      2.9    19.1    +      -       -      +
     80D  GLU      4.0     3.1    -      -       -      +
     82D  THR*     1.3    76.9    +      -       -      +
     84D  LEU*     1.3    59.6    +      -       -      +
     86D  LYS*     3.2     4.8    +      -       -      +
     87D  ILE*     2.9    28.1    +      -       -      +
    180D  ALA*     3.7    11.4    -      -       -      -
    184D  MET*     3.5    22.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 84 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     80D  GLU*     3.2    21.0    +      -       +      +
     81D  GLU*     4.2     4.5    -      -       -      +
     82D  THR      3.5     0.2    -      -       -      -
     83D  CYS*     1.3    75.4    -      -       -      +
     85D  VAL*     1.3    57.7    +      -       +      +
     87D  ILE*     3.3     5.6    +      -       +      +
     88D  ILE*     3.0    38.1    +      -       +      +
    126D  LEU*     3.9    41.5    -      -       +      +
    129D  LYS*     3.8    43.3    -      -       +      +
    130D  ALA*     4.0    12.3    -      -       +      +
    181D  LEU*     4.0    12.8    -      -       +      -
    184D  MET*     3.9    17.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 85 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     81D  GLU*     3.5    17.9    +      -       +      +
     82D  THR*     3.5    11.8    +      -       -      +
     83D  CYS      3.3     0.6    -      -       -      -
     84D  LEU*     1.3    73.3    -      -       +      +
     86D  LYS*     1.3    64.6    +      -       -      +
     88D  ILE*     4.1     1.6    -      -       -      +
     89D  THR*     2.6    39.7    +      -       -      +
    130D  ALA*     5.9     4.7    -      -       +      -
    132D  ASN*     4.7     9.4    -      -       +      +
    135D  ALA*     3.6    46.9    -      -       +      +
    136D  ILE*     4.4    10.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 86 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65D  PRO*     4.8     4.1    -      -       -      +
     66D  LYS      2.6    38.9    +      -       -      +
     67D  MET*     3.7    15.5    -      -       -      -
     68D  ALA*     5.5     0.4    -      -       -      +
     70D  LYS*     5.8     0.2    -      -       -      +
     71D  ASP*     3.1    47.9    +      -       +      +
     73D  CYS*     4.4     0.7    -      -       -      -
     82D  THR      3.0    14.3    +      -       -      +
     83D  CYS*     3.4     8.5    -      -       -      +
     85D  VAL*     1.3    78.1    -      -       -      +
     87D  ILE*     1.4    56.6    +      -       -      +
     89D  THR*     4.4     8.3    -      -       +      -
     90D  GLY*     2.8    36.4    +      -       -      +
     93D  GLU*     5.7     1.6    -      -       -      -
    173D  PHE*     3.9    13.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 87 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29D  ILE*     6.2     0.4    -      -       +      -
     67D  MET*     3.7    12.3    -      -       +      -
     83D  CYS*     2.9    38.3    +      -       -      +
     84D  LEU*     3.3     6.7    +      -       +      +
     86D  LYS*     1.4    71.4    -      -       -      +
     88D  ILE*     1.3    62.2    +      -       -      +
     91D  LEU*     3.1    30.2    +      -       +      +
    126D  LEU*     3.3    28.9    -      -       +      -
    173D  PHE*     3.9     6.6    -      -       -      -
    177D  SER*     3.4    51.4    -      -       -      +
    180D  ALA*     4.4     1.1    -      -       +      -
    181D  LEU*     4.1    19.3    -      -       +      -
    184D  MET*     4.3     2.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 88 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     84D  LEU*     3.0    21.4    +      -       +      +
     85D  VAL*     4.1     2.2    -      -       -      +
     87D  ILE*     1.3    74.4    -      -       -      +
     89D  THR*     1.3    66.1    +      -       -      +
     91D  LEU*     3.2     8.3    +      -       -      +
     92D  LEU*     3.0    29.3    +      -       +      +
    123D  ILE*     4.7     7.3    -      -       +      +
    126D  LEU*     3.8    44.6    -      -       +      +
    127D  GLN*     4.0    21.8    -      -       +      +
    130D  ALA*     4.1    13.5    -      -       +      -
    136D  ILE*     3.8    40.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 89 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     85D  VAL*     2.6    27.9    +      -       -      +
     86D  LYS*     3.8    11.7    -      -       +      -
     88D  ILE*     1.3    73.4    -      -       -      +
     90D  GLY*     1.3    64.5    +      -       -      +
     92D  LEU*     3.1    10.5    +      -       -      +
     93D  GLU*     3.1    36.4    +      -       -      +
    136D  ILE*     3.8     6.9    -      -       -      -
    137D  THR*     3.3    50.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 90 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65D  PRO*     3.7    14.0    -      -       -      +
     86D  LYS*     2.8    24.7    +      -       -      +
     89D  THR*     1.3    74.8    -      -       -      +
     91D  LEU*     1.3    60.6    +      -       -      +
     93D  GLU*     3.1    16.5    +      -       -      +
     94D  PHE*     3.1    18.0    +      -       -      -
    173D  PHE*     3.6    20.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 91 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     87D  ILE*     3.1    26.4    +      -       +      +
     88D  ILE*     3.2     4.7    +      -       -      +
     90D  GLY*     1.3    76.3    -      -       -      +
     92D  LEU*     1.3    61.2    +      -       -      +
     94D  PHE*     3.4    12.9    +      -       -      +
     95D  GLU*     3.5    17.8    +      -       -      +
    119D  THR*     4.6     6.5    -      -       +      +
    122D  LEU*     3.9    25.1    -      -       +      -
    123D  ILE*     3.8    25.5    -      -       +      +
    126D  LEU*     3.9    20.2    -      -       +      -
    170D  PHE*     3.8    28.7    -      -       +      -
    173D  PHE*     3.8    13.0    -      -       +      -
    174D  LEU*     4.0    17.9    -      -       +      -
    177D  SER*     5.5     0.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 92 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     88D  ILE*     3.0    25.7    +      -       +      +
     89D  THR*     3.1     7.8    +      -       -      +
     91D  LEU*     1.3    78.4    -      -       -      +
     93D  GLU*     1.3    62.1    +      -       -      +
     95D  GLU*     3.1    38.9    +      -       -      +
     96D  VAL      4.5     1.0    +      -       -      -
    123D  ILE*     4.1    19.3    -      -       +      -
    127D  GLN*     4.9     5.6    -      -       -      +
    136D  ILE*     3.8    28.9    -      -       +      -
    138D  THR*     4.4     9.4    -      -       -      -
    139D  PRO*     3.7    31.7    -      -       +      +
    144D  ASN*     5.7     1.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 93 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65D  PRO*     3.8    25.1    -      -       +      +
     86D  LYS*     5.7     1.7    -      -       -      -
     89D  THR*     3.1    34.7    +      -       -      +
     90D  GLY*     3.1     7.3    +      -       -      +
     92D  LEU*     1.3    77.2    -      -       -      +
     94D  PHE*     1.3    61.4    -      -       -      +
     95D  GLU      3.3     0.7    +      -       -      -
     96D  VAL*     3.7     9.9    -      -       -      +
     97D  TYR*     3.3    22.3    -      -       +      -
    137D  THR*     4.1    16.2    -      -       -      +
    139D  PRO*     4.0    21.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 94 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     64D  LEU*     3.9    26.0    -      -       +      -
     65D  PRO*     3.5    32.8    -      -       +      -
     90D  GLY      3.1    20.2    +      -       -      -
     91D  LEU*     3.7     9.6    -      -       -      +
     92D  LEU      3.2     0.4    -      -       -      -
     93D  GLU*     1.3    77.9    -      -       -      +
     95D  GLU*     1.3    61.6    +      -       -      +
     97D  TYR*     3.1    29.3    +      +       +      +
     98D  LEU*     3.3    16.6    +      -       +      +
    166D  ILE*     4.2     4.9    -      -       +      -
    169D  SER      3.8     8.7    -      -       -      -
    170D  PHE*     3.5    60.1    -      +       +      -
    173D  PHE*     3.8    30.7    -      +       +      -
----------------------------------------------------------
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Residues in contact with GLU 95 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91D  LEU      3.5    13.7    +      -       -      +
     92D  LEU*     3.1    32.5    +      -       -      +
     94D  PHE*     1.3    76.7    -      -       -      +
     96D  VAL*     1.3    62.8    +      -       -      +
     98D  LEU*     3.2    11.5    +      -       +      +
     99D  GLU*     3.2    21.9    +      -       -      +
    116D  GLN*     4.7     4.3    -      -       +      +
    119D  THR*     4.7     8.8    -      -       +      +
    120D  LYS*     2.7    51.6    +      -       -      +
    123D  ILE*     3.8    14.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 96 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     92D  LEU      4.5     1.2    +      -       -      -
     93D  GLU      3.7    15.6    +      -       -      +
     95D  GLU*     1.3    76.6    -      -       -      +
     97D  TYR*     1.3    73.7    +      -       +      +
     99D  GLU*     3.1    12.7    -      -       +      +
    100D  TYR*     3.1    23.7    +      -       -      +
    144D  ASN*     3.7    53.9    -      -       +      +
    147D  LEU*     3.9    17.7    -      -       +      -
    148D  LEU*     4.0    19.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 97 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     62D  LEU*     4.2    19.7    -      -       +      +
     63D  ASN*     3.6    19.8    +      -       -      -
     64D  LEU*     3.5    33.0    -      -       +      +
     65D  PRO*     5.3     2.9    -      -       +      -
     93D  GLU*     3.3    27.6    -      -       +      -
     94D  PHE*     3.1    16.5    +      +       +      +
     96D  VAL*     1.3    83.3    -      -       +      +
     98D  LEU*     1.3    58.3    +      -       +      +
    100D  TYR*     3.2     9.8    -      -       -      +
    101D  LEU*     3.1    28.8    +      -       -      +
    147D  LEU*     3.7    30.6    -      -       +      +
    151D  LEU*     4.3    16.2    -      -       +      -
    166D  ILE*     3.9    31.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 98 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     94D  PHE*     3.4    18.6    -      -       +      +
     95D  GLU*     3.2    13.7    +      -       +      +
     97D  TYR*     1.3    76.0    -      -       -      +
     99D  GLU*     1.3    64.6    +      -       -      +
    101D  LEU*     3.4    28.0    +      -       +      +
    102D  GLN*     3.0    25.9    +      -       -      +
    115D  VAL*     4.4     5.6    -      -       +      +
    116D  GLN*     4.2    28.9    -      -       +      +
    119D  THR*     3.8    38.1    -      -       +      +
    166D  ILE*     4.7     7.9    -      -       +      -
    170D  PHE*     4.0    31.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 99 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     95D  GLU      3.2    11.6    +      -       -      +
     96D  VAL*     3.1    15.5    -      -       +      +
     98D  LEU*     1.3    73.3    -      -       -      +
    100D  TYR*     1.3    65.9    +      -       -      +
    102D  GLN*     3.0    27.3    +      -       -      +
    103D  ASN*     4.3     5.9    +      -       -      -
    116D  GLN*     3.0    25.7    +      -       -      +
    148D  LEU*     4.6    19.9    -      -       +      +
    152D  GLN*     5.8     0.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 100 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     96D  VAL      3.1     8.6    +      -       -      +
     97D  TYR*     3.2    10.1    -      -       -      +
     99D  GLU*     1.3    77.9    -      -       -      +
    101D  LEU*     1.3    66.2    +      -       +      +
    102D  GLN      3.2     1.2    +      -       -      -
    103D  ASN*     3.5    10.4    +      -       -      +
    104D  ARG*     3.4    24.8    -      -       +      +
    148D  LEU*     3.9    15.2    -      -       +      +
    151D  LEU*     3.5    40.3    +      -       +      -
    152D  GLN*     4.2    17.6    +      -       +      +
    159D  GLN*     2.6    59.4    +      -       -      +
    162D  THR*     4.2    10.7    -      -       +      +
    163D  THR*     3.6    19.7    -      -       -      -
    166D  ILE*     3.7    24.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 101 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     39D  LEU*     4.4    12.3    -      -       +      -
     97D  TYR      3.1    17.8    +      -       -      +
     98D  LEU*     3.5    28.3    -      -       +      +
     99D  GLU      3.1     0.8    -      -       -      -
    100D  TYR*     1.3    84.3    -      -       +      +
    102D  GLN*     1.3    66.2    +      -       -      +
    103D  ASN      3.3     0.2    -      -       -      -
    104D  ARG*     3.1    12.7    +      -       +      -
    105D  PHE*     3.2    25.7    -      -       +      -
    112D  ALA*     4.3     3.9    -      -       +      +
    115D  VAL*     5.6     3.8    -      -       +      -
    163D  THR*     3.9    35.9    -      -       +      +
    166D  ILE*     4.2    15.3    -      -       +      -
    167D  LEU*     3.7    26.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 102 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98D  LEU*     3.0    21.5    -      -       -      +
     99D  GLU*     3.0    21.2    +      -       -      +
    101D  LEU*     1.3    78.7    -      -       -      +
    103D  ASN*     1.3    70.6    +      -       -      +
    104D  ARG      3.4     0.7    +      -       -      -
    105D  PHE*     3.9    12.6    +      -       -      +
    109D  GLU*     4.5    10.4    +      -       -      +
    112D  ALA*     2.9    28.2    -      -       -      +
    113D  ARG*     3.5    29.1    -      -       -      +
    116D  GLN*     3.4    27.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 103 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99D  GLU*     4.6     5.2    +      -       -      -
    100D  TYR      3.5     8.3    +      -       -      +
    101D  LEU      3.3     0.4    -      -       -      -
    102D  GLN*     1.3    87.3    -      -       -      +
    104D  ARG*     1.3    69.2    +      -       -      +
    105D  PHE      3.4     2.3    +      -       -      -
    106D  GLU*     4.9    10.2    +      -       -      +
    152D  GLN*     3.9    21.8    +      -       -      +
----------------------------------------------------------
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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