Contacts of the helix formed by residues 170 - 194 (chain D) in PDB entry 5XVO


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 170 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    164D  PHE*     3.8    15.2    -      -       -      -
    168D  GLN*     3.2    24.5    +      -       +      +
    169D  GLU*     1.3    76.8    -      -       -      +
    171D  ASP*     1.3    65.5    +      -       -      +
    172D  ILE*     2.9    13.5    +      -       +      +
    173D  ASN*     2.7    51.0    +      -       -      +
    174D  ALA*     3.1    20.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 171 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    170D  ASN*     1.3    75.9    -      -       -      +
    172D  ILE*     1.3    63.9    +      -       +      +
    174D  ALA*     3.7     6.2    -      -       -      +
    175D  GLY      3.1    17.2    +      -       -      -
    233D  ARG      5.9     0.2    -      -       -      +
    235D  GLU      4.1     3.1    -      -       -      +
    236D  ALA*     4.0     8.0    -      -       -      +
    237D  PHE*     3.6    30.7    +      -       -      +
    240D  MET*     3.1    28.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 172 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    160D  PHE*     3.7    49.1    -      -       +      -
    164D  PHE*     4.0    18.6    -      -       +      -
    170D  ASN*     2.9    11.0    +      -       -      +
    171D  ASP*     1.3    77.3    -      -       +      +
    173D  ASN*     1.3    59.8    +      -       -      +
    175D  GLY*     3.4     1.7    +      -       -      -
    176D  LEU*     3.0    33.1    +      -       +      +
    229D  ILE*     3.9     8.4    -      -       +      +
    233D  ARG*     4.0    31.9    -      -       +      +
    240D  MET*     4.0     9.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 173 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    164D  PHE*     3.2    23.5    -      -       -      -
    166D  ARG*     2.7    43.6    +      -       -      +
    167D  GLU      5.2     0.4    -      -       -      -
    168D  GLN*     2.8    39.8    +      -       -      +
    170D  ASN*     2.7    27.2    +      -       -      +
    172D  ILE*     1.3    71.5    -      -       -      +
    174D  ALA*     1.3    56.5    +      -       -      +
    176D  LEU*     3.1     3.1    +      -       -      +
    177D  ASN*     2.8    47.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 174 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     72D  LEU*     5.4     4.2    -      -       +      +
    170D  ASN      3.1    16.0    +      -       -      +
    171D  ASP*     3.7     9.4    -      -       -      +
    173D  ASN*     1.3    77.8    -      -       -      +
    175D  GLY*     1.3    57.0    +      -       -      +
    177D  ASN*     3.5     9.0    +      -       -      +
    178D  TYR*     3.0    30.5    +      -       -      +
    237D  PHE*     3.6    24.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 175 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    171D  ASP      3.1    12.0    +      -       -      -
    172D  ILE      3.7     2.2    -      -       -      -
    174D  ALA*     1.3    79.2    -      -       -      +
    176D  LEU*     1.3    63.8    +      -       -      +
    178D  TYR*     3.4     1.5    +      -       -      +
    179D  GLY      3.0    18.2    +      -       -      -
    229D  ILE*     2.8    22.7    -      -       -      +
    237D  PHE*     3.6    13.7    -      -       -      -
    240D  MET*     4.1     8.3    -      -       -      -
    244D  LEU*     3.4     8.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 176 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    156D  PHE*     3.4    28.7    -      -       +      -
    160D  PHE*     4.6     4.7    -      -       +      -
    164D  PHE*     4.5     0.2    -      -       +      -
    166D  ARG*     4.0    13.5    -      -       -      +
    172D  ILE*     3.0    27.3    +      -       +      +
    173D  ASN*     3.5    23.6    -      -       -      +
    175D  GLY*     1.3    75.0    -      -       -      +
    177D  ASN*     1.3    58.6    +      -       -      +
    179D  GLY*     3.2     2.1    +      -       -      -
    180D  TYR*     2.8    43.1    +      -       +      +
    225D  VAL*     3.9     6.9    -      -       +      +
    226D  ASP*     3.2    35.4    -      -       -      +
    229D  ILE*     2.9    22.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 177 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     81C  TYR*     5.9     2.9    -      -       -      +
    166D  ARG*     2.7    34.1    +      -       -      +
    173D  ASN*     2.8    33.5    +      -       -      +
    174D  ALA*     3.7     8.1    -      -       -      +
    176D  LEU*     1.3    75.2    -      -       -      +
    178D  TYR*     1.3    61.5    +      -       -      +
    180D  TYR*     3.2     7.1    +      -       -      +
    181D  THR*     2.9    29.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 178 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41D  LEU*     4.0    12.8    -      -       -      +
     43D  GLU*     4.6     1.6    +      -       -      +
     67D  CYS*     5.7     0.9    -      -       -      -
     71D  ARG      4.0     8.4    +      -       -      -
     72D  LEU*     4.2    10.5    -      -       +      -
     73D  PRO*     3.4    34.3    -      -       +      +
    174D  ALA      3.0    18.5    +      -       -      +
    175D  GLY*     3.6     6.5    -      -       -      +
    177D  ASN*     1.3    77.8    -      -       -      +
    179D  GLY*     1.3    63.6    +      -       -      +
    181D  THR*     3.2     9.0    +      -       -      -
    182D  LEU*     3.1    47.0    +      -       +      +
    237D  PHE*     4.4     4.9    -      +       +      -
    241D  LYS*     3.5    48.6    +      -       +      +
    244D  LEU*     3.7    14.8    -      -       +      -
    245D  PHE*     3.6    23.2    -      +       -      -
----------------------------------------------------------
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Residues in contact with GLY 179 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    175D  GLY      3.0     8.6    +      -       -      -
    176D  LEU      3.7     2.5    -      -       -      -
    178D  TYR*     1.3    80.9    -      -       -      +
    180D  TYR*     1.3    61.8    +      -       -      +
    182D  LEU*     3.1    19.0    +      -       -      +
    183D  LEU*     3.2    16.1    +      -       -      +
    225D  VAL*     4.1    16.2    -      -       -      +
    244D  LEU*     3.7    23.3    -      -       -      -
    247D  LEU*     4.8     1.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 180 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    156D  PHE*     3.7    13.9    -      +       -      -
    166D  ARG*     3.4    35.0    -      -       -      -
    176D  LEU*     2.8    24.2    +      -       +      +
    177D  ASN*     3.6     6.1    -      -       -      +
    179D  GLY*     1.3    76.6    -      -       -      +
    181D  THR*     1.3    57.2    +      -       -      +
    183D  LEU*     3.3     4.5    +      -       -      +
    184D  LEU*     2.9    25.9    +      -       -      +
    218D  MET*     3.5    15.5    -      -       +      +
    222D  ARG*     3.4    59.2    +      -       +      +
    225D  VAL*     3.6    24.9    -      -       +      -
    226D  ASP*     2.5    27.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with THR 181 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     80C  PHE*     3.6    44.9    -      -       +      -
     81C  TYR*     4.5    11.8    +      -       -      +
     65D  LEU*     5.8     1.1    -      -       +      -
     73D  PRO*     3.9    19.8    -      -       +      +
    177D  ASN*     2.9    17.0    +      -       -      +
    178D  TYR*     3.2     8.6    +      -       -      -
    180D  TYR*     1.3    74.6    -      -       -      +
    182D  LEU*     1.3    67.1    +      -       +      +
    184D  LEU*     3.2     8.8    +      -       +      +
    185D  SER*     2.8    27.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 182 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41D  LEU*     5.7     1.1    -      -       +      -
     63D  LEU*     5.0     0.7    -      -       -      +
     65D  LEU*     4.2    23.6    -      -       +      -
     73D  PRO*     5.6     5.2    -      -       +      -
    178D  TYR*     3.1    46.4    +      -       +      +
    179D  GLY*     3.1    12.5    +      -       -      +
    181D  THR*     1.3    79.6    -      -       +      +
    183D  LEU*     1.3    63.6    +      -       -      +
    185D  SER*     3.2    14.3    +      -       -      -
    186D  ILE*     3.2    18.8    +      -       +      +
    244D  LEU*     4.4    10.8    -      -       +      +
    245D  PHE*     4.7     9.4    -      -       +      -
    247D  LEU*     4.4    16.2    -      -       +      -
    248D  PHE*     4.2    33.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 183 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    179D  GLY      3.2    10.5    +      -       -      +
    180D  TYR*     3.5     7.4    -      -       +      +
    182D  LEU*     1.3    77.6    -      -       +      +
    184D  LEU*     1.3    66.8    +      -       -      +
    186D  ILE*     3.1    18.6    +      -       +      +
    187D  PHE*     3.2    26.7    +      -       +      -
    218D  MET*     3.8    20.0    -      -       +      -
    221D  PHE*     3.6    37.0    -      -       +      +
    222D  ARG*     4.1     4.7    -      -       -      +
    224D  LEU*     5.5     1.1    -      -       +      -
    225D  VAL*     3.2    31.2    -      -       +      -
    247D  LEU*     4.8     9.0    -      -       +      -
    261D  LEU*     3.9    28.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 184 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     80C  PHE*     3.9    28.9    -      -       +      -
     76D  LYS*     4.4     0.2    -      -       -      -
    180D  TYR      2.9    14.7    +      -       -      +
    181D  THR*     3.2    14.1    +      -       +      +
    183D  LEU*     1.3    75.8    -      -       -      +
    185D  SER*     1.3    57.5    +      -       -      +
    187D  PHE*     3.2     2.6    +      -       -      -
    188D  ALA*     2.8    31.6    +      -       +      +
    211D  PHE*     3.7    32.3    -      -       +      -
    214D  ALA*     3.6    28.5    -      -       +      +
    215D  SER*     3.6    26.9    -      -       -      +
    218D  MET*     3.8    12.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with SER 185 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     80C  PHE*     3.5    11.3    -      -       -      -
     63D  LEU*     3.7    18.5    -      -       -      +
     65D  LEU*     3.4    19.8    -      -       -      +
     76D  LYS*     3.1    30.0    +      -       -      +
    181D  THR*     2.8    15.1    +      -       -      +
    182D  LEU*     3.5     8.4    -      -       -      -
    183D  LEU      3.1     0.2    -      -       -      -
    184D  LEU*     1.3    74.7    -      -       -      +
    186D  ILE*     1.3    66.7    +      -       -      +
    189D  ARG*     3.1    23.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 186 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63D  LEU*     4.4    12.6    -      -       +      -
    182D  LEU*     3.2    14.8    +      -       +      +
    183D  LEU*     3.1    17.3    +      -       +      +
    185D  SER*     1.3    78.2    -      -       -      +
    187D  PHE*     1.3    61.9    -      -       +      +
    189D  ARG*     3.5     8.2    +      -       -      +
    190D  GLU*     3.2    29.5    +      -       +      +
    247D  LEU*     6.1     0.9    -      -       +      -
    248D  PHE*     3.7    32.1    -      -       +      -
    261D  LEU*     4.0    25.1    -      -       +      -
    262D  THR*     4.5    19.3    -      -       +      -
    265D  ALA*     3.5    30.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 187 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    183D  LEU*     3.2    29.3    +      -       +      +
    184D  LEU      3.2     5.2    +      -       -      +
    186D  ILE*     1.3    82.7    -      -       +      +
    188D  ALA*     1.3    67.0    +      -       -      +
    190D  GLU*     3.8     2.7    -      -       -      +
    191D  LEU*     3.0    28.4    +      -       -      +
    214D  ALA*     4.2    19.7    -      -       +      +
    217D  LEU*     4.1    16.4    -      -       +      -
    218D  MET*     3.8    18.2    -      -       +      -
    221D  PHE*     3.5    48.9    -      +       +      -
    261D  LEU*     5.8     1.6    -      -       +      -
    265D  ALA*     3.6    32.3    -      -       +      -
    268D  TYR*     4.2     9.2    -      +       -      -
    269D  THR*     3.4    20.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 188 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     78C  LEU*     5.3     6.7    -      -       +      -
     76D  LYS*     2.4    39.0    -      -       -      +
     78D  LEU*     6.0     2.7    -      -       +      -
    184D  LEU*     2.8    13.4    +      -       +      +
    187D  PHE*     1.3    78.7    -      -       -      +
    189D  ARG*     1.3    60.0    +      -       -      +
    191D  LEU*     3.8     1.9    -      -       -      +
    192D  VAL*     3.2    29.1    +      -       +      +
    198D  THR*     3.9    12.4    -      -       +      +
    211D  PHE*     5.4     2.5    -      -       +      -
    214D  ALA*     3.8    15.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 189 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     38D  ASP*     3.0    48.4    +      -       -      +
     39D  VAL*     4.7     2.6    -      -       -      +
     61D  LYS*     3.1    31.9    +      -       +      -
     62D  ILE      4.7     0.2    -      -       -      -
     63D  LEU*     3.4    32.5    -      -       +      +
     76D  LYS*     4.0     2.6    -      -       -      +
     79D  PRO*     6.2     4.0    -      -       +      -
    185D  SER      3.1    14.2    +      -       -      +
    186D  ILE*     3.6     8.5    +      -       -      +
    187D  PHE      3.2     0.2    -      -       -      -
    188D  ALA*     1.3    80.9    -      -       -      +
    190D  GLU*     1.3    80.5    +      -       -      +
    192D  VAL*     3.4     6.1    +      -       -      +
    193D  GLN*     3.1    32.0    +      -       +      +
    262D  THR*     3.5    22.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 190 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    186D  ILE*     3.2    18.2    +      -       +      +
    187D  PHE*     3.3     3.3    +      -       -      +
    189D  ARG*     1.3   103.8    +      -       -      +
    191D  LEU*     1.3    62.1    +      -       -      +
    193D  GLN*     3.2    27.4    +      -       -      +
    194D  THR*     3.1    25.8    +      -       -      +
    262D  THR*     4.0     5.4    -      -       -      +
    265D  ALA*     4.0    17.7    -      -       +      +
    266D  THR*     3.1    38.9    +      -       -      +
    269D  THR*     3.7    23.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 191 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    187D  PHE      3.0    19.2    +      -       -      +
    188D  ALA      3.8     3.6    -      -       -      +
    190D  GLU*     1.3    75.7    -      -       -      +
    192D  VAL*     1.3    65.0    +      -       -      +
    194D  THR*     2.7    24.4    +      -       -      -
    196D  CYS*     3.2    19.1    +      -       +      +
    198D  THR*     3.9    12.8    -      -       +      -
    213D  LEU*     3.6    34.1    -      -       +      +
    214D  ALA*     3.6    34.8    -      -       +      +
    217D  LEU*     3.8    14.8    -      -       +      -
    269D  THR*     3.8    20.4    -      -       +      -
    273D  VAL*     4.2    15.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 192 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     78D  LEU*     3.8    27.1    -      -       +      -
     79D  PRO*     3.7    33.4    -      -       +      +
     80D  PHE      5.3     0.7    -      -       -      -
     82D  GLY*     3.5    28.7    +      -       -      +
    188D  ALA      3.2    14.2    +      -       -      +
    189D  ARG*     3.7     9.2    -      -       -      +
    191D  LEU*     1.3    77.2    -      -       -      +
    193D  GLN*     1.3    61.8    +      -       -      +
    195D  GLY*     3.0    13.9    +      -       -      -
    196D  CYS      3.7    12.1    -      -       -      +
    197D  PHE*     5.9     0.2    -      -       -      -
    198D  THR*     4.0    11.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 193 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     61D  LYS*     3.5    43.2    +      -       +      +
     82D  GLY*     3.9    10.1    -      -       -      +
     83D  ARG*     3.0    26.7    +      -       -      +
    189D  ARG*     3.1    24.1    +      -       +      +
    190D  GLU*     3.2    32.7    -      -       -      +
    192D  VAL*     1.3    78.6    -      -       -      +
    194D  THR*     1.3    57.0    +      -       +      +
    266D  THR*     5.4     7.2    -      -       +      +
    270D  LYS*     5.9     5.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 194 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     83D  ARG*     3.6    18.9    +      -       -      +
     89D  GLN*     3.4    18.9    -      -       -      +
    190D  GLU      3.1    17.7    -      -       -      +
    191D  LEU*     2.7    14.5    +      -       -      +
    193D  GLN*     1.3    78.7    -      -       +      +
    195D  GLY*     1.3    56.4    +      -       -      +
    196D  CYS*     3.3    19.6    -      -       -      -
    269D  THR*     4.3    14.1    -      -       +      -
    270D  LYS*     4.4    26.9    -      -       +      -
    273D  VAL*     4.1    12.8    -      -       +      +
----------------------------------------------------------
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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