Contacts of the helix formed by residues 894 - 922 (chain C) in PDB entry 1XD2


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 PRO 894 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    849C  VAL*     5.4     2.0    -      -       +      -
    853C  SER*     5.0     3.6    -      -       -      +
    892C  GLN      3.6     6.9    -      -       -      +
    893C  ILE*     1.3    90.5    -      -       +      +
    895C  SER*     1.3    67.2    +      -       -      +
    896C  ARG*     3.3    25.6    -      -       -      +
    897C  GLN*     3.2    44.2    +      -       +      +
    898C  LYS*     3.4     9.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 895 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    893C  ILE      3.5     1.9    +      -       -      -
    894C  PRO*     1.3    72.7    -      -       -      +
    896C  ARG*     1.3    64.7    +      -       -      +
    897C  GLN      3.3     0.5    +      -       -      -
    898C  LYS*     3.4    13.0    +      -       -      +
    899C  LYS*     3.4    19.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 896 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    860C  GLN*     6.2     1.3    -      -       -      +
    894C  PRO*     3.3    26.7    -      -       -      +
    895C  SER*     1.3    78.4    +      -       -      +
    897C  GLN*     1.3    79.3    +      -       +      +
    899C  LYS*     3.4    10.7    +      -       -      +
    900C  ILE*     3.3    27.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 897 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    853C  SER*     2.9    53.1    +      -       -      -
    856C  ILE*     3.9    18.9    -      -       +      +
    857C  GLU*     3.6    19.6    +      -       -      +
    860C  GLN*     5.4     3.5    -      -       -      +
    893C  ILE*     3.8    15.3    -      -       +      +
    894C  PRO*     3.2    24.8    +      -       +      +
    896C  ARG*     1.3    96.3    -      -       +      +
    898C  LYS*     1.3    64.8    +      -       -      +
    900C  ILE*     3.1    13.3    +      -       +      +
    901C  LEU*     3.0    23.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 898 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    856C  ILE*     5.7     0.4    -      -       -      -
    890C  PHE*     2.9    29.7    +      -       +      +
    891C  GLU*     3.4    20.4    +      -       -      +
    893C  ILE*     3.1    26.8    +      -       +      +
    894C  PRO      3.4     7.3    +      -       -      +
    895C  SER*     3.4    13.3    +      -       -      +
    897C  GLN*     1.3    77.2    -      -       -      +
    899C  LYS*     1.3    57.9    +      -       -      +
    901C  LEU*     3.2     8.5    +      -       -      +
    902C  GLU*     2.8    31.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 899 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    895C  SER      3.4     9.1    +      -       -      +
    896C  ARG*     3.5    11.9    -      -       -      +
    897C  GLN      3.2     0.4    -      -       -      -
    898C  LYS*     1.3    81.2    -      -       -      +
    900C  ILE*     1.3    55.1    +      -       +      +
    902C  GLU*     3.3     6.4    +      -       -      +
    903C  GLU*     2.7    60.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 900 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    856C  ILE*     4.2    15.9    -      -       +      +
    859C  LEU*     4.3    12.1    -      -       +      -
    860C  GLN*     3.3    42.4    -      -       +      +
    863C  GLN*     4.2    20.3    +      -       -      +
    896C  ARG*     3.3    18.1    +      -       +      +
    897C  GLN*     3.1    16.7    +      -       +      +
    899C  LYS*     1.3    78.0    -      -       +      +
    901C  LEU*     1.3    62.4    +      -       -      +
    903C  GLU*     3.4     8.8    +      -       -      +
    904C  ALA*     3.0    22.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 901 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    856C  ILE*     4.3    16.2    -      -       +      -
    859C  LEU*     3.8    23.8    -      -       +      -
    874C  VAL*     4.7     3.4    -      -       +      -
    875C  VAL*     4.8    10.8    -      -       +      -
    878C  MET*     3.8    39.0    -      -       +      -
    879C  ASN*     5.7     1.8    -      -       -      +
    890C  PHE*     3.9    23.3    -      -       +      -
    897C  GLN      3.0    15.5    +      -       -      +
    898C  LYS*     3.7     8.1    -      -       -      +
    900C  ILE*     1.3    77.9    -      -       -      +
    902C  GLU*     1.3    56.5    +      -       -      +
    904C  ALA*     3.5     3.9    +      -       -      +
    905C  HIS*     2.9    29.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 902 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    898C  LYS      2.8    17.7    +      -       -      +
    899C  LYS*     3.6     8.7    -      -       +      +
    901C  LEU*     1.3    73.9    -      -       -      +
    903C  GLU*     1.3    57.1    +      -       -      +
    905C  HIS*     3.1    15.8    +      -       -      +
    906C  GLU*     2.7    77.2    +      -       -      +
    909C  GLU*     4.0     7.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 903 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    863C  GLN*     4.8     7.4    -      -       -      +
    899C  LYS*     2.7    53.8    +      -       +      +
    900C  ILE*     3.7     7.6    -      -       -      +
    902C  GLU*     1.3    75.7    -      -       -      +
    904C  ALA*     1.3    64.8    +      -       -      +
    906C  GLU*     3.2    33.1    +      -       -      +
    907C  LEU*     3.3    16.2    +      -       -      +
    914C  LYS*     5.9     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 904 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    859C  LEU*     3.9    18.2    -      -       +      -
    863C  GLN*     4.1    11.8    +      -       -      +
    871C  VAL*     4.1    10.1    -      -       +      -
    872C  LEU*     4.7     3.1    -      -       -      +
    875C  VAL*     3.8    24.7    -      -       +      +
    900C  ILE      3.0    15.6    +      -       -      +
    901C  LEU      3.5     5.6    -      -       -      +
    903C  GLU*     1.3    80.3    -      -       -      +
    905C  HIS*     1.3    62.0    +      -       -      +
    907C  LEU*     3.1    26.8    +      -       -      +
    908C  SER*     4.1     1.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with HIS 905 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     70B  GLN*     4.6     8.8    +      -       -      +
    875C  VAL*     3.9    17.0    -      -       +      +
    879C  ASN*     3.9    31.9    +      -       -      +
    884C  TYR*     6.4     0.2    -      +       -      -
    901C  LEU*     2.9    20.4    +      -       +      +
    902C  GLU*     3.5    16.6    +      -       -      +
    904C  ALA*     1.3    75.6    -      -       -      +
    906C  GLU*     1.3    63.3    +      -       -      +
    907C  LEU      3.0     0.5    +      -       -      -
    908C  SER*     2.9    32.5    +      -       -      -
    909C  GLU*     3.2    29.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 906 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    902C  GLU*     2.7    55.5    +      -       -      +
    903C  GLU*     3.2    22.4    +      -       -      +
    905C  HIS*     1.3    73.3    -      -       -      +
    907C  LEU*     1.3    62.3    +      -       -      +
    908C  SER      3.2     0.2    -      -       -      -
    909C  GLU*     3.2    36.6    +      -       -      +
    914C  LYS*     2.8    48.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 907 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    863C  GLN*     4.5     8.1    -      -       +      +
    868C  PHE*     4.5    19.7    -      -       +      -
    871C  VAL*     4.2    21.5    -      -       +      -
    872C  LEU*     5.0     7.9    -      -       +      -
    903C  GLU      3.3    13.8    +      -       -      +
    904C  ALA*     3.1    19.6    +      -       -      +
    905C  HIS      3.0     1.0    -      -       -      -
    906C  GLU*     1.3    79.1    -      -       -      +
    908C  SER*     1.3    60.9    +      -       -      +
    909C  GLU      3.6     1.0    +      -       -      +
    912C  TYR*     3.3    12.3    -      -       -      -
    914C  LYS*     3.9    12.9    +      -       +      +
    915C  TYR*     3.2    52.7    +      -       +      +
    918C  LYS*     4.2    14.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 908 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     70B  GLN*     3.2    28.6    +      -       -      -
     71B  TYR*     5.9     0.2    -      -       -      -
    872C  LEU*     4.8     8.7    -      -       -      +
    875C  VAL*     4.8     2.1    -      -       -      +
    904C  ALA      4.1     0.4    +      -       -      -
    905C  HIS*     2.9    22.4    +      -       -      -
    907C  LEU*     1.3    76.6    -      -       -      +
    909C  GLU*     1.3    67.7    +      -       -      +
    910C  ASP      3.6     0.5    +      -       -      -
    911C  HIS*     3.7     2.9    +      -       -      -
    912C  TYR*     3.0    48.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 909 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    902C  GLU*     4.0     8.2    -      -       -      +
    905C  HIS*     3.2    42.8    +      -       +      +
    906C  GLU*     3.2    35.1    +      -       -      +
    907C  LEU      3.9     2.1    -      -       -      +
    908C  SER*     1.3    82.7    +      -       -      +
    910C  ASP*     1.3    70.9    +      -       +      +
    912C  TYR*     3.2     4.2    +      -       -      -
    913C  LYS*     3.5     8.0    +      -       -      +
    914C  LYS*     4.6     1.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 910 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     40B  TYR*     5.1     2.0    +      -       -      -
     41B  ARG*     3.1    34.5    +      -       -      -
     54B  ASP*     5.4     0.2    -      -       -      +
    908C  SER      3.6     0.2    +      -       -      -
    909C  GLU*     1.3    77.6    -      -       +      +
    911C  HIS*     1.3    75.0    +      -       -      +
    913C  LYS*     3.2    35.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with HIS 911 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     40B  TYR*     3.2    56.4    +      +       +      +
     41B  ARG*     3.7     9.9    -      -       -      -
     54B  ASP*     3.0    22.3    +      -       -      -
     55B  ILE      3.5    22.0    -      -       -      -
     56B  LEU*     3.6    26.4    -      -       +      +
     57B  ASP      4.9     3.2    +      -       -      -
    908C  SER      3.7     2.9    +      -       -      -
    909C  GLU      3.4     0.8    -      -       -      -
    910C  ASP*     1.3    83.2    -      -       -      +
    912C  TYR*     1.3    76.0    +      -       -      +
    913C  LYS*     3.3     1.6    +      -       -      -
    916C  LEU*     4.3     8.7    -      -       -      +
    932C  ILE*     5.2     0.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 912 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     58B  THR*     5.9     0.7    -      -       +      -
     61B  GLN*     5.2     2.9    -      -       -      -
     67B  MET*     3.3    19.4    -      -       -      +
     70B  GLN*     4.8     0.5    +      -       -      -
     71B  TYR*     2.7    41.5    +      +       -      -
    872C  LEU*     3.7    20.6    -      -       +      -
    907C  LEU      3.3    11.4    -      -       -      -
    908C  SER*     3.0    44.6    +      -       -      -
    909C  GLU      3.2     0.4    +      -       -      -
    911C  HIS*     1.3    81.2    -      -       -      +
    913C  LYS*     1.3    63.8    +      -       -      +
    914C  LYS      3.4     2.9    -      -       -      -
    915C  TYR*     3.3    22.8    +      +       +      -
    916C  LEU*     2.9    28.3    +      -       +      +
    929C  PHE*     3.6     9.8    -      +       -      -
    932C  ILE*     3.1    32.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 913 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     37B  GLU*     3.3    30.9    +      -       -      +
    909C  GLU      3.5     4.9    +      -       -      +
    910C  ASP*     3.2    37.5    +      -       +      +
    911C  HIS      3.2     1.7    -      -       -      -
    912C  TYR*     1.3    79.1    -      -       -      +
    914C  LYS*     1.3    68.2    +      -       +      +
    916C  LEU*     3.4     9.0    +      -       -      +
    917C  ALA*     3.2    18.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 914 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    903C  GLU      5.9     0.2    -      -       -      +
    906C  GLU*     2.8    57.2    +      -       +      +
    907C  LEU*     3.9    15.0    +      -       +      +
    909C  GLU*     4.6     1.8    +      -       -      +
    912C  TYR      3.4     0.2    -      -       -      -
    913C  LYS*     1.3    81.5    -      -       +      +
    915C  TYR*     1.3    61.5    +      -       -      +
    917C  ALA*     3.0     9.5    +      -       +      +
    918C  LYS*     2.8    28.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 915 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    868C  PHE*     3.6    42.2    -      +       +      -
    872C  LEU*     5.3     5.8    -      -       +      -
    907C  LEU*     3.2    39.0    +      -       +      +
    912C  TYR*     3.6    26.2    -      +       +      +
    914C  LYS*     1.3    78.5    -      -       -      +
    916C  LEU*     1.3    76.1    +      -       +      +
    918C  LYS*     3.0     3.3    +      -       -      +
    919C  LEU*     2.8    44.2    +      -       +      +
    928C  PRO*     3.6    12.5    -      -       -      +
    929C  PHE*     2.9    35.5    +      -       +      -
    932C  ILE*     3.7    20.6    -      -       +      -
    933C  TYR*     5.3     1.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 916 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     40B  TYR*     5.9     2.7    -      -       -      +
    911C  HIS      4.3     8.5    -      -       -      +
    912C  TYR*     2.9    27.8    +      -       +      +
    913C  LYS*     3.7     7.4    -      -       -      +
    915C  TYR*     1.3    94.5    -      -       +      +
    917C  ALA*     1.3    62.7    +      -       -      +
    919C  LEU*     3.8     7.5    +      -       +      +
    920C  ARG*     3.1    36.2    +      -       -      +
    932C  ILE*     4.0    24.7    -      -       +      -
    933C  TYR*     6.6     0.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 917 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    913C  LYS*     3.2    12.8    +      -       +      +
    914C  LYS*     3.0    12.2    +      -       -      +
    916C  LEU*     1.3    77.8    -      -       -      +
    918C  LYS*     1.3    62.6    +      -       -      +
    920C  ARG*     3.2    12.3    +      -       -      +
    921C  SER*     3.2    22.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 918 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    863C  GLN*     6.0     7.6    -      -       -      -
    866C  ASN*     5.3     1.3    -      -       -      -
    868C  PHE*     3.5    26.5    -      -       +      -
    907C  LEU*     4.2    13.5    -      -       +      -
    914C  LYS      2.8    15.9    +      -       -      +
    915C  TYR*     3.2    13.0    -      -       -      +
    917C  ALA*     1.3    72.4    -      -       -      +
    919C  LEU*     1.3    57.4    +      -       -      +
    921C  SER*     2.9    31.8    +      -       -      +
    922C  ILE*     3.1    28.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 919 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     43A  GLN*     3.0    21.0    +      -       -      -
    868C  PHE*     3.9    18.6    -      -       +      -
    915C  TYR*     2.8    51.6    +      -       +      +
    916C  LEU*     4.2     7.9    -      -       +      +
    918C  LYS*     1.3    73.8    -      -       -      +
    920C  ARG*     1.3    59.4    +      -       +      +
    921C  SER      3.3     0.5    +      -       -      -
    922C  ILE*     3.6     8.6    -      -       +      +
    926C  CYS*     3.8    29.6    -      -       -      -
    928C  PRO*     4.2     5.6    -      -       +      -
    933C  TYR*     3.8    22.7    -      -       +      +
    970C  GLU*     4.7     5.4    -      -       -      +
    974C  TYR*     3.3    20.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 920 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      1A  MET*     3.5    57.0    +      -       -      +
     43A  GLN*     3.6     9.9    +      -       -      -
     50A  THR*     3.3    19.8    -      -       -      +
    916C  LEU*     3.1    30.3    +      -       +      +
    917C  ALA*     3.2     9.4    +      -       -      +
    919C  LEU*     1.3    79.9    -      -       +      +
    921C  SER*     1.3    58.2    +      -       -      +
    974C  TYR*     4.4     3.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 921 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45A  VAL*     3.8     5.2    -      -       -      +
     50A  THR*     2.8    25.9    +      -       -      -
    917C  ALA      3.2    11.0    +      -       -      -
    918C  LYS*     2.9    27.8    +      -       -      +
    920C  ARG*     1.3    79.4    -      -       -      +
    922C  ILE*     1.3    65.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 922 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     43A  GLN*     2.8    31.9    +      -       -      +
     45A  VAL*     4.0     5.2    +      -       -      +
     50A  THR*     4.5     0.3    -      -       -      +
    866C  ASN*     3.3    25.1    -      -       -      +
    868C  PHE*     3.9    22.9    -      -       +      -
    918C  LYS*     3.1    32.6    +      -       +      +
    919C  LEU*     3.6    12.0    +      -       +      +
    921C  SER*     1.3    82.0    -      -       -      +
    923C  ASN*     1.3    62.9    +      -       -      +
    924C  PRO*     3.4    16.8    -      -       +      +
    926C  CYS*     3.8    29.4    -      -       +      -
    974C  TYR*     4.9     0.2    -      -       +      -
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


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

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

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