Contacts of the helix formed by residues 50 - 75 (chain Q) in PDB entry 1JY3


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 SER 50 (chain Q).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     79O  LEU      4.9     1.0    +      -       -      -
     81O  VAL      4.0    10.0    +      -       -      -
     83O  CYS*     6.6     0.2    -      -       -      -
     49Q  PRO*     1.3    75.1    -      -       -      +
     51Q  GLY*     1.3    60.5    +      -       -      +
     52Q  CYS*     3.1    20.6    +      -       -      +
     53Q  ARG*     3.1    15.3    +      -       -      +
     54Q  MET*     3.0    27.0    +      -       -      +
     68R  ASP*     5.8     0.4    -      -       -      -
     83R  CYS*     3.6     8.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 51 (chain Q). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     49Q  PRO      3.6     2.6    +      -       -      -
     50Q  SER*     1.3    73.5    +      -       -      +
     52Q  CYS*     1.3    56.6    +      -       -      +
     54Q  MET*     3.5     2.2    +      -       -      +
     55Q  LYS*     3.0    28.1    +      -       -      +
     83R  CYS*     3.8    11.1    -      -       -      +
     84R  PRO*     3.6    27.2    -      -       -      +
     89R  LEU*     3.9     6.4    -      -       -      +
     22S  THR*     4.0    14.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with CYS 52 (chain Q). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     36N  TRP*     4.6     9.6    -      -       +      -
     50Q  SER*     3.1     6.2    +      -       -      +
     51Q  GLY*     1.3    74.5    -      -       -      +
     53Q  ARG*     1.3    66.3    +      -       -      +
     56Q  GLY      3.1     9.7    +      -       -      -
     68R  ASP*     3.5     6.5    -      -       +      +
     69R  ALA      2.9    41.4    +      -       -      +
     71R  GLY*     3.4    29.8    -      -       -      -
     81R  VAL*     4.4     3.4    -      -       -      -
     83R  CYS*     2.0    45.5    -      -       -      +
     84R  PRO*     4.2     0.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 53 (chain Q). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     77O  PRO      3.8     2.8    +      -       -      -
     78O  ASP      3.0    34.6    +      -       -      +
     79O  LEU*     4.0    11.7    -      -       -      +
     80O  GLY*     3.7    17.2    -      -       -      +
     49Q  PRO*     5.1     0.2    -      -       +      -
     50Q  SER*     3.1    23.2    +      -       -      +
     52Q  CYS*     1.3    79.2    -      -       -      +
     54Q  MET*     1.3    67.6    +      -       -      +
     56Q  GLY*     3.1     2.9    +      -       -      -
     57Q  LEU*     3.0    33.7    +      -       +      +
     66R  PRO*     3.5    27.6    +      -       -      +
     67R  PRO      3.1    16.9    +      -       -      -
     68R  ASP*     2.9    40.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 54 (chain Q). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     79O  LEU*     4.1     4.9    -      -       +      -
     49Q  PRO*     3.7    26.2    -      -       +      -
     50Q  SER      3.0    19.6    +      -       -      +
     51Q  GLY      3.8     4.7    -      -       -      +
     52Q  CYS      3.3     0.2    -      -       -      -
     53Q  ARG*     1.3    77.7    -      -       -      +
     55Q  LYS*     1.3    56.0    +      -       -      +
     57Q  LEU*     3.2    25.9    +      -       +      +
     58Q  ILE*     2.8    35.4    +      -       -      +
     89R  LEU*     4.2    13.2    -      -       +      -
     22S  THR*     4.0    23.1    -      -       +      +
     25S  ILE*     4.3    11.4    -      -       +      -
     26S  ALA*     3.5    33.4    -      -       +      +
     29S  LEU*     4.2    17.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 55 (chain Q). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     51Q  GLY      3.0    18.1    +      -       -      +
     54Q  MET*     1.3    75.5    -      -       -      +
     56Q  GLY*     1.3    58.0    +      -       -      +
     58Q  ILE*     4.2     5.2    -      -       +      -
     59Q  ASP*     2.9    57.8    +      -       -      +
     69R  ALA*     3.9    14.1    -      -       +      +
     70R  ASP*     3.0    39.5    +      -       +      +
     84R  PRO*     4.3     7.2    -      -       +      -
     88R  LYS*     4.7     8.5    -      -       -      +
     89R  LEU*     3.9    18.5    -      -       +      +
     92R  THR*     4.1    30.7    -      -       +      -
     95R  ARG*     5.9     1.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 56 (chain Q). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     52Q  CYS      3.1     9.5    +      -       -      -
     53Q  ARG      3.1     7.6    +      -       -      -
     55Q  LYS*     1.3    77.6    -      -       -      +
     57Q  LEU*     1.3    60.3    +      -       -      +
     59Q  ASP*     3.4     4.6    +      -       -      +
     60Q  GLU*     3.1    18.9    +      -       -      +
     67R  PRO*     3.6    33.9    -      -       -      +
     69R  ALA*     3.9    14.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 57 (chain Q). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     78O  ASP*     3.9    35.7    -      -       +      +
     79O  LEU*     3.9    27.1    -      -       +      -
     53Q  ARG*     3.0    22.4    +      -       +      +
     54Q  MET*     3.7    20.0    -      -       +      +
     56Q  GLY*     1.3    72.6    -      -       -      +
     58Q  ILE*     1.3    65.1    +      -       -      +
     60Q  GLU*     3.3    20.3    +      -       -      +
     61Q  VAL*     3.1    27.6    +      -       +      +
     67R  PRO*     4.2    16.2    -      -       +      -
     29S  LEU*     4.0    14.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 58 (chain Q). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     54Q  MET*     2.8    20.7    +      -       -      +
     55Q  LYS*     3.7     6.7    -      -       +      +
     57Q  LEU*     1.3    76.0    -      -       -      +
     59Q  ASP*     1.3    66.1    +      -       -      +
     61Q  VAL*     3.3     3.6    +      -       -      +
     62Q  ASP*     3.0    22.3    +      -       -      +
     89R  LEU*     3.8    29.6    -      -       +      +
     92R  THR*     4.0    14.4    -      -       +      -
     93R  LEU*     3.9    32.8    -      -       +      -
     96R  GLN*     3.3    27.0    +      -       -      +
     25S  ILE*     3.9    12.1    -      -       +      -
     29S  LEU*     4.1    21.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 59 (chain Q). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     55Q  LYS*     2.9    53.0    +      -       -      +
     56Q  GLY*     3.6     6.1    -      -       -      +
     58Q  ILE*     1.3    79.1    -      -       -      +
     60Q  GLU*     1.3    56.3    +      -       -      +
     62Q  ASP*     3.3     5.9    +      -       -      +
     63Q  GLN*     2.9    31.5    +      -       -      +
     69R  ALA*     4.0    15.1    -      -       +      +
     70R  ASP*     4.9     1.2    -      -       -      +
     96R  GLN*     4.2     9.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 60 (chain Q). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     56Q  GLY      3.1    12.6    +      -       -      +
     57Q  LEU*     3.5    19.8    -      -       -      +
     58Q  ILE      3.3     0.2    -      -       -      -
     59Q  ASP*     1.3    77.2    -      -       -      +
     61Q  VAL*     1.3    64.5    +      -       +      +
     63Q  GLN*     3.4     6.8    +      -       -      +
     64Q  ASP*     3.0    24.4    +      -       +      +
     64R  ARG*     2.5    52.2    +      -       -      -
     67R  PRO*     4.6     6.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 61 (chain Q). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     57Q  LEU*     3.1    14.8    +      -       +      +
     58Q  ILE      3.3     7.4    +      -       -      +
     60Q  GLU*     1.3    80.5    -      -       +      +
     62Q  ASP*     1.3    56.8    +      -       -      +
     64Q  ASP*     3.3     7.0    +      -       -      +
     65Q  PHE*     3.0    60.6    +      -       +      -
     29S  LEU*     4.1    27.4    -      -       +      -
     32S  TYR*     4.4     7.9    -      -       +      -
     33S  GLN*     3.9    21.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 62 (chain Q). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     58Q  ILE      3.0    16.7    +      -       -      +
     59Q  ASP*     3.8     5.6    -      -       -      +
     61Q  VAL*     1.3    78.7    -      -       -      +
     63Q  GLN*     1.3    58.8    +      -       -      +
     65Q  PHE*     3.9     4.8    -      -       -      +
     66Q  THR*     2.9    44.6    +      -       -      -
     96R  GLN*     3.6    46.8    -      -       -      +
    100R  ILE*     4.2    16.1    -      -       -      +
     32S  TYR*     4.9     2.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 63 (chain Q). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     59Q  ASP      2.9    18.1    +      -       -      +
     60Q  GLU*     3.7     7.5    -      -       -      +
     62Q  ASP*     1.3    78.3    -      -       -      +
     64Q  ASP*     1.3    63.5    +      -       -      +
     66Q  THR*     3.9     4.7    -      -       -      -
     67Q  SER*     2.9    41.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 64 (chain Q). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     60Q  GLU*     3.0    15.8    +      -       +      +
     61Q  VAL*     3.3    11.2    +      -       -      +
     63Q  GLN*     1.3    83.7    +      -       -      +
     65Q  PHE*     1.3    66.0    +      -       -      +
     67Q  SER*     3.7     3.2    -      -       -      -
     68Q  ARG*     2.9    72.1    +      -       -      +
     33S  GLN*     4.9     3.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 65 (chain Q). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     61Q  VAL*     3.0    35.8    +      -       +      +
     62Q  ASP*     4.0     4.7    -      -       -      +
     64Q  ASP*     1.3    95.3    -      -       -      +
     66Q  THR*     1.3    61.8    +      -       -      +
     68Q  ARG*     3.3    12.9    +      -       -      +
     69Q  ILE*     3.0    31.5    +      -       +      +
    100R  ILE*     4.0    16.2    -      -       +      -
     32S  TYR*     4.0    20.2    -      +       -      -
     33S  GLN*     3.5    46.9    -      -       +      -
     36S  VAL*     3.5    28.5    -      -       +      -
     37S  ASP      4.1     3.6    -      -       -      -
     40S  LEU*     3.5    22.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 66 (chain Q). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     62Q  ASP*     2.9    33.3    +      -       -      -
     63Q  GLN*     3.9     5.8    -      -       -      +
     65Q  PHE*     1.3    75.1    -      -       -      +
     67Q  SER*     1.3    63.8    +      -       -      +
     69Q  ILE*     3.3     6.3    +      -       -      +
     70Q  ASN*     3.0    39.3    +      -       -      +
    100R  ILE*     4.2    14.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 67 (chain Q). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63Q  GLN*     2.9    37.0    +      -       -      +
     64Q  ASP*     3.7     5.6    -      -       -      -
     66Q  THR*     1.3    78.1    -      -       -      +
     68Q  ARG*     1.3    59.1    +      -       -      +
     70Q  ASN*     3.3     7.6    +      -       -      +
     71Q  LYS*     2.9    55.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 68 (chain Q). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     64Q  ASP*     2.9    52.6    +      -       -      +
     65Q  PHE*     3.9    15.8    -      -       -      +
     66Q  THR      3.3     0.2    -      -       -      -
     67Q  SER*     1.3    78.3    -      -       -      +
     69Q  ILE*     1.3    62.8    +      -       -      +
     71Q  LYS*     3.4    10.8    +      -       +      +
     72Q  LEU*     3.1    29.3    +      -       +      +
     33S  GLN*     5.2     0.6    +      -       -      -
     37S  ASP*     2.9    34.1    +      -       -      -
     40S  LEU*     3.4    31.6    -      -       +      +
     41S  ARG*     3.9     5.7    -      -       -      +
     44S  GLU*     2.9    41.7    +      -       -      +
     48S  TYR*     4.3     1.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 69 (chain Q). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65Q  PHE*     3.0    16.7    +      -       +      +
     66Q  THR*     3.7     5.8    -      -       -      +
     68Q  ARG*     1.3    75.4    -      -       -      +
     70Q  ASN*     1.3    65.6    +      -       -      +
     72Q  LEU*     3.2     9.3    +      -       -      +
     73Q  ARG*     3.0    53.5    +      -       -      +
    100R  ILE*     3.7    42.6    -      -       +      +
    103R  SER*     3.9    22.7    -      -       -      +
    104R  ILE*     4.4     5.8    -      -       +      -
    107R  LEU*     4.3    12.3    -      -       +      +
     40S  LEU*     4.0    17.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 70 (chain Q). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     66Q  THR*     3.0    35.2    +      -       -      +
     67Q  SER*     3.7     6.3    -      -       -      +
     69Q  ILE*     1.3    79.5    -      -       -      +
     71Q  LYS*     1.3    62.0    +      -       +      +
     73Q  ARG*     3.2    27.7    +      -       -      +
     74Q  ASP*     3.0    30.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 71 (chain Q). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     67Q  SER*     2.9    37.8    +      -       -      +
     68Q  ARG*     3.8     8.7    -      -       +      +
     70Q  ASN*     1.3    76.1    -      -       +      +
     72Q  LEU*     1.3    61.9    +      -       -      +
     74Q  ASP*     3.2    14.7    +      -       -      +
     75Q  SER*     3.0    25.3    +      -       -      -
     48S  TYR*     3.3    17.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 72 (chain Q). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     68Q  ARG      3.1    21.2    +      -       -      +
     69Q  ILE*     3.2     6.3    +      -       -      +
     71Q  LYS*     1.3    76.8    -      -       -      +
     73Q  ARG*     1.3    62.1    +      -       -      +
     75Q  SER*     2.9    14.6    +      -       -      -
     76Q  LEU*     3.3    14.8    +      -       -      +
    107R  LEU*     3.8    21.3    -      -       +      -
     40S  LEU*     3.9    23.8    -      -       +      -
     43S  LEU*     3.6    48.9    -      -       +      +
     44S  GLU*     3.7    17.5    -      -       +      +
     47S  LEU*     4.2    11.8    -      -       +      +
     48S  TYR*     3.7    19.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 73 (chain Q). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     69Q  ILE*     3.0    29.2    +      -       +      +
     70Q  ASN*     3.2    25.6    +      -       -      +
     72Q  LEU*     1.3    76.8    -      -       -      +
     74Q  ASP*     1.3    61.3    -      -       -      +
     75Q  SER      3.1     0.9    +      -       -      -
     76Q  LEU*     3.2    30.7    +      -       +      +
     77Q  PHE      4.7     1.0    +      -       -      -
    103R  SER*     3.6    31.9    +      -       -      +
    106R  ASP*     6.2     1.0    -      -       -      +
    107R  LEU*     4.2    17.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 74 (chain Q). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     70Q  ASN*     3.0    19.9    +      -       -      +
     71Q  LYS*     3.5    17.7    -      -       -      +
     72Q  LEU      3.2     0.2    -      -       -      -
     73Q  ARG*     1.3    77.7    -      -       -      +
     75Q  SER*     1.3    58.3    +      -       -      +
     76Q  LEU      3.5     0.6    +      -       -      -
     77Q  PHE      4.5     1.7    +      -       -      -
     78Q  ASN      3.0    24.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 75 (chain Q). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     71Q  LYS      3.0     6.6    +      -       -      -
     72Q  LEU      2.9    10.7    +      -       -      -
     74Q  ASP*     1.3    77.4    -      -       -      +
     76Q  LEU*     1.3    65.7    +      -       -      +
     77Q  PHE      3.2     2.5    -      -       -      -
     78Q  ASN*     3.2    16.8    +      -       -      +
     47S  LEU*     4.0    25.3    -      -       -      +
     48S  TYR*     2.9    37.1    -      -       -      -
----------------------------------------------------------
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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