Contacts of the helix formed by residues 193 - 217 (chain A) in PDB entry 1X0X


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 GLU 193 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    191A  VAL*     3.7     5.7    -      -       +      +
    192A  GLN*     1.3    73.6    -      -       -      +
    194A  VAL*     1.3    65.2    +      -       -      +
    195A  ASP*     3.2     5.4    +      -       +      +
    196A  THR*     2.9    26.8    +      -       -      +
    197A  VAL*     3.3    25.1    +      -       -      +
    246A  PRO*     3.8    18.1    -      -       -      +
    247A  VAL*     3.8     0.3    -      -       -      -
    248A  SER*     2.8    36.4    +      -       -      -
    251A  THR*     2.8    26.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 194 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133A  SER*     4.7     4.7    -      -       -      +
    144A  MET      4.6    12.8    -      -       -      +
    146A  VAL*     3.8    30.4    -      -       +      +
    167A  GLY*     3.6    32.3    -      -       -      +
    168A  CYS*     3.7     8.3    -      -       -      +
    169A  LYS*     3.8    27.5    -      -       +      +
    192A  GLN      2.8    17.1    +      -       -      +
    193A  GLU*     1.3    72.1    -      -       -      +
    195A  ASP*     1.3    69.3    +      -       -      +
    197A  VAL*     3.2     2.8    +      -       -      +
    198A  GLU*     2.9    26.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 195 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    131A  LEU*     2.7    38.6    -      -       +      +
    133A  SER*     5.5     0.2    +      -       -      -
    134A  GLU*     3.8    13.0    -      -       -      +
    169A  LYS*     5.8     4.9    +      -       -      -
    193A  GLU*     3.2     3.1    -      -       +      -
    194A  VAL*     1.3    82.6    -      -       -      +
    196A  THR*     1.3    64.5    +      -       -      +
    198A  GLU*     3.2     2.9    +      -       -      +
    199A  ILE*     3.0    26.1    +      -       -      +
    243A  CYS*     4.7    12.4    -      -       +      -
    244A  SER*     3.5    33.7    +      -       -      +
    247A  VAL*     6.4     0.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 196 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    193A  GLU*     2.9    33.0    +      -       -      +
    195A  ASP*     1.3    78.7    -      -       -      +
    197A  VAL*     1.3    63.9    +      -       -      +
    199A  ILE*     3.0    25.6    -      -       +      +
    200A  CYS*     3.1    10.5    +      -       -      -
    243A  CYS*     5.1     2.2    -      -       -      -
    246A  PRO      4.3     1.2    +      -       -      -
    247A  VAL*     3.6    21.9    -      -       +      +
    251A  THR*     3.6    23.3    -      -       +      -
    252A  PHE*     3.6    35.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 197 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    146A  VAL*     3.9    15.3    -      -       +      -
    148A  MET*     3.7    17.4    -      -       +      +
    165A  THR*     4.1    14.6    -      -       +      +
    167A  GLY*     4.4     4.0    -      -       -      +
    191A  VAL*     3.5    29.2    -      -       +      -
    193A  GLU      3.3    14.1    -      -       -      +
    194A  VAL      3.5     7.0    -      -       -      +
    196A  THR*     1.3    79.3    -      -       -      +
    198A  GLU*     1.3    62.6    +      -       -      +
    200A  CYS*     3.4    14.2    +      -       -      +
    201A  GLY      3.5     3.8    +      -       -      -
    251A  THR*     3.9    12.6    -      -       +      -
    256A  CYS*     3.8    30.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 198 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    117A  SER*     5.2     1.5    +      -       -      -
    119A  ILE      4.8     7.5    -      -       -      +
    121A  GLY      4.8     6.4    +      -       -      +
    131A  LEU*     3.8    23.6    -      -       +      +
    132A  ILE*     3.3    16.1    +      -       -      +
    133A  SER*     2.4    47.4    +      -       -      -
    146A  VAL*     3.4    19.8    -      -       +      +
    148A  MET*     4.2    18.5    -      -       +      +
    194A  VAL*     2.9    17.6    +      -       -      +
    195A  ASP      3.7     4.0    -      -       -      +
    197A  VAL*     1.3    76.6    -      -       -      +
    199A  ILE*     1.3    65.4    +      -       -      +
    201A  GLY*     3.1    12.8    +      -       -      -
    202A  ALA*     3.2    10.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 199 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    122A  VAL*     3.7    27.1    -      -       +      -
    129A  LEU*     3.8    26.0    -      -       +      -
    131A  LEU*     4.1     7.4    -      -       +      +
    195A  ASP      3.0    15.0    +      -       -      +
    196A  THR*     3.0    27.6    -      -       +      +
    198A  GLU*     1.3    76.8    -      -       -      +
    200A  CYS*     1.3    65.4    +      -       -      +
    202A  ALA*     3.1     3.0    +      -       -      +
    203A  LEU*     2.9    48.2    +      -       +      +
    238A  PHE*     4.6    12.3    -      -       +      -
    239A  ALA*     3.9    21.3    -      -       +      -
    243A  CYS*     4.2    11.9    -      -       -      -
    252A  PHE*     4.9     1.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with CYS 200 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    196A  THR*     3.1    20.5    +      -       -      -
    197A  VAL      3.5     9.0    -      -       -      +
    199A  ILE*     1.3    77.1    -      -       -      +
    201A  GLY*     1.3    62.3    +      -       -      +
    204A  LYS*     3.1    27.9    +      -       -      +
    235A  MET*     3.8    12.8    -      -       +      +
    251A  THR      5.1     0.2    -      -       -      -
    252A  PHE*     3.4    41.1    -      -       -      -
    256A  CYS*     3.1    28.7    -      -       +      +
    257A  GLY*     4.0    13.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 201 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    120A  LYS*     3.4    36.7    -      -       -      +
    148A  MET*     4.1    11.2    -      -       -      +
    197A  VAL      3.5     3.8    +      -       -      -
    198A  GLU      3.1     8.4    +      -       -      -
    200A  CYS*     1.3    79.6    -      -       -      +
    202A  ALA*     1.3    60.8    +      -       -      +
    204A  LYS*     3.4    22.7    -      -       -      +
    205A  ASN*     4.0     1.4    +      -       -      -
    256A  CYS      4.2     1.9    +      -       -      -
    260A  ASP*     4.3     3.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 202 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    120A  LYS*     4.3     0.6    -      -       -      +
    121A  GLY*     3.3    39.2    -      -       -      +
    122A  VAL*     3.4    20.2    -      -       +      -
    198A  GLU      3.2    10.5    +      -       -      +
    199A  ILE*     3.1    10.4    +      -       +      +
    201A  GLY*     1.3    80.3    -      -       -      +
    203A  LEU*     1.3    64.9    +      -       +      +
    205A  ASN*     3.6    13.2    +      -       -      +
    206A  VAL      4.4     0.3    +      -       -      -
    302A  THR*     3.6    17.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 203 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    122A  VAL*     5.2     0.9    -      -       +      -
    199A  ILE*     2.9    30.9    +      -       +      +
    202A  ALA*     1.3    78.4    -      -       +      +
    204A  LYS*     1.3    64.9    +      -       -      +
    205A  ASN      3.1     2.5    -      -       -      -
    206A  VAL*     3.1    18.0    +      -       -      +
    207A  VAL*     3.4    14.8    +      -       -      +
    235A  MET*     3.8    43.7    -      -       +      +
    238A  PHE*     3.8    27.4    -      -       +      -
    252A  PHE*     6.1     0.4    -      -       +      -
    302A  THR*     4.8     2.5    -      -       +      -
    306A  LEU*     3.6    39.5    -      -       +      -
    322A  PHE*     4.2     7.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 204 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    120A  LYS*     3.7    13.6    -      -       -      +
    200A  CYS      3.1    15.0    +      -       -      +
    201A  GLY      3.4    21.3    -      -       -      +
    203A  LEU*     1.3    77.3    -      -       -      +
    205A  ASN*     1.3    85.3    +      -       -      +
    207A  VAL*     3.4     4.5    +      -       -      +
    208A  ALA*     2.9    27.7    +      -       -      +
    235A  MET*     4.3     4.6    -      -       +      +
    256A  CYS      5.2     1.1    -      -       -      +
    257A  GLY      5.5     0.2    -      -       -      +
    260A  ASP*     3.0    32.8    +      -       +      +
    261A  LEU*     3.6    36.7    -      -       +      +
    264A  THR*     2.9    30.2    +      -       -      +
    265A  CYS*     4.9     0.3    -      -       -      -
   1002A  SO4      3.0    14.1    +      -       -      -
   2001A  NAD      5.8     0.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 205 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    120A  LYS*     3.8    21.6    +      -       -      +
    201A  GLY      4.0     2.0    +      -       -      -
    202A  ALA      3.6     9.0    +      -       -      +
    203A  LEU      3.1     1.0    -      -       -      -
    204A  LYS*     1.3   113.6    +      -       -      +
    206A  VAL*     1.3    65.3    +      -       -      +
    208A  ALA*     3.5     5.2    +      -       -      +
    209A  VAL*     3.1    25.6    +      -       -      +
    264A  THR*     3.6     7.4    -      -       -      +
    270A  ASN*     3.3    18.6    +      -       -      +
    298A  GLN*     3.9    16.4    -      -       +      +
    299A  GLY*     3.6    19.3    -      -       -      +
    302A  THR*     5.1     0.4    -      -       -      +
   1002A  SO4      3.6     3.9    +      -       -      -
   2001A  NAD      4.3     4.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 206 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    202A  ALA      4.5     0.2    -      -       -      +
    203A  LEU      3.1    11.1    +      -       -      +
    205A  ASN*     1.3    72.7    -      -       -      +
    207A  VAL*     1.3    66.4    +      -       -      +
    209A  VAL*     3.0    20.9    +      -       -      +
    210A  GLY      3.4     3.3    +      -       -      -
    299A  GLY      3.5    22.0    -      -       -      +
    302A  THR*     3.7    18.8    -      -       +      -
    303A  ALA*     3.7    22.9    -      -       +      +
    306A  LEU*     4.1     9.4    -      -       +      -
    322A  PHE*     3.9    27.1    -      -       +      -
    325A  VAL*     3.7    28.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 207 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    203A  LEU      3.4    14.8    -      -       -      +
    204A  LYS      3.5     5.6    -      -       -      +
    206A  VAL*     1.3    76.5    -      -       -      +
    208A  ALA*     1.3    57.2    +      -       -      +
    210A  GLY*     2.9    18.4    +      -       -      -
    211A  ALA*     2.9    10.9    +      -       -      +
    227A  VAL*     3.7    32.5    -      -       +      +
    228A  ILE*     4.3     2.7    -      -       -      -
    231A  GLY*     3.9    22.2    -      -       -      -
    235A  MET*     4.2     6.1    -      -       -      -
    261A  LEU*     3.8    25.1    -      -       +      -
    265A  CYS*     4.2     7.0    -      -       -      -
    321A  LEU*     4.7     9.9    -      -       +      -
    322A  PHE*     4.1    15.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 208 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    204A  LYS      2.9    12.7    +      -       -      +
    205A  ASN*     3.7     7.0    -      -       -      +
    206A  VAL      3.2     0.4    -      -       -      -
    207A  VAL*     1.3    73.9    -      -       -      +
    209A  VAL*     1.3    64.1    +      -       -      +
    211A  ALA*     3.3     2.1    +      -       -      +
    212A  GLY      3.0    17.7    +      -       -      -
    264A  THR*     3.4    38.4    -      -       +      +
    265A  CYS*     3.5    18.5    -      -       -      -
    270A  ASN*     4.3     7.9    -      -       +      -
    271A  ARG*     3.7    13.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 209 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    205A  ASN      3.1    17.4    +      -       -      +
    206A  VAL*     3.0     8.7    +      -       -      +
    208A  ALA*     1.3    77.1    -      -       -      +
    210A  GLY*     1.3    62.9    +      -       -      +
    212A  GLY      3.2     0.2    +      -       -      -
    213A  PHE*     3.1    46.1    +      -       +      -
    270A  ASN*     4.0    13.7    -      -       +      +
    274A  ALA*     3.1    25.9    -      -       +      +
    284A  ILE*     5.4     1.3    -      -       +      -
    299A  GLY*     3.9    20.2    -      -       -      -
    300A  PRO*     4.0    10.8    -      -       +      -
    325A  VAL*     3.7    13.7    -      -       +      -
    329A  CYS*     4.1     8.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 210 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    206A  VAL      3.4     3.6    +      -       -      -
    207A  VAL      2.9     9.0    +      -       -      -
    209A  VAL*     1.3    77.8    -      -       -      +
    211A  ALA*     1.3    64.8    +      -       -      +
    213A  PHE*     3.1    12.2    +      -       -      +
    214A  CYS*     3.1    25.1    +      -       -      -
    227A  VAL*     4.2     6.7    -      -       -      -
    321A  LEU*     5.3     0.2    -      -       -      -
    325A  VAL*     4.1     4.4    -      -       -      +
    338A  PHE*     3.7    25.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 211 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    207A  VAL      2.9     6.4    +      -       -      +
    208A  ALA      3.3     8.0    +      -       -      +
    210A  GLY*     1.3    75.4    -      -       -      +
    212A  GLY*     1.3    62.6    +      -       -      +
    214A  CYS*     3.2     7.6    +      -       -      +
    215A  ASP*     3.0    27.4    +      -       -      +
    224A  LYS*     4.1    13.8    -      -       +      +
    227A  VAL*     3.8    16.2    -      -       +      +
    265A  CYS*     3.7    42.4    -      -       +      +
    271A  ARG*     4.7     0.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 212 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    208A  ALA      3.0    10.7    +      -       -      -
    209A  VAL      3.2     4.0    +      -       -      -
    210A  GLY      3.2     0.4    -      -       -      -
    211A  ALA*     1.3    75.8    -      -       -      +
    213A  PHE*     1.3    58.2    +      -       -      +
    215A  ASP*     3.3     3.8    +      -       -      +
    216A  GLY      2.8    22.9    +      -       -      -
    271A  ARG*     3.6    31.8    -      -       -      +
    274A  ALA*     3.8     2.9    -      -       -      -
    275A  GLU*     3.1    19.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 213 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    209A  VAL*     3.1    42.9    +      -       +      -
    210A  GLY*     3.3    11.2    -      -       -      +
    212A  GLY*     1.3    75.3    -      -       -      +
    214A  CYS*     1.3    59.0    +      -       -      +
    216A  GLY*     2.7    18.5    +      -       -      -
    217A  LEU*     2.8    18.5    +      -       -      +
    274A  ALA*     3.4    22.7    -      -       +      -
    277A  PHE*     3.8    18.2    -      +       -      -
    278A  ALA*     4.0     7.0    -      -       +      +
    284A  ILE*     5.9     0.4    -      -       +      -
    325A  VAL*     4.3    13.9    -      -       -      -
    328A  VAL*     3.5    31.4    -      -       +      -
    329A  CYS*     4.0    11.0    -      -       -      -
    335A  VAL*     3.8    23.3    -      -       +      -
    338A  PHE*     3.9    28.3    -      +       +      -
----------------------------------------------------------
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Residues in contact with CYS 214 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    210A  GLY      3.1    14.2    +      -       -      -
    211A  ALA*     3.2     7.4    +      -       -      +
    213A  PHE*     1.3    79.9    -      -       -      +
    215A  ASP*     1.3    61.4    +      -       -      +
    217A  LEU*     3.2     8.2    +      -       -      -
    219A  PHE*     2.8    36.7    +      -       +      -
    223A  THR*     3.9    18.8    -      -       +      -
    224A  LYS*     5.5     3.4    -      -       +      +
    227A  VAL*     3.7    22.0    -      -       +      -
    338A  PHE*     3.7    23.1    -      -       -      -
    339A  ILE*     3.9    18.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 215 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    211A  ALA      3.0    14.7    +      -       -      +
    212A  GLY      3.5     8.1    -      -       -      +
    214A  CYS*     1.3    76.7    -      -       -      +
    216A  GLY*     1.3    57.2    +      -       -      +
    217A  LEU      3.1     0.2    -      -       -      -
    218A  GLY*     3.0    19.4    +      -       -      -
    219A  PHE      3.9    16.8    -      -       -      +
    220A  GLY*     5.0     3.8    -      -       -      +
    224A  LYS*     2.7    37.9    +      -       -      +
    271A  ARG*     3.0    32.6    +      -       -      +
    275A  GLU*     3.9     9.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 216 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    212A  GLY      2.8     8.3    +      -       -      -
    213A  PHE      2.7    10.5    +      -       -      -
    215A  ASP*     1.3    77.6    -      -       -      +
    217A  LEU*     1.3    59.7    +      -       -      +
    218A  GLY      3.3     1.1    +      -       -      -
    275A  GLU*     3.5    20.1    -      -       -      +
    278A  ALA*     3.7    20.0    -      -       -      +
    279A  ARG*     4.0    16.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 217 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    213A  PHE      2.8    20.3    +      -       -      +
    214A  CYS*     3.2     1.5    +      -       -      -
    215A  ASP      3.1     0.4    -      -       -      -
    216A  GLY*     1.3    81.6    -      -       -      +
    218A  GLY*     1.3    60.8    +      -       -      +
    219A  PHE*     3.5    32.4    -      -       +      -
    278A  ALA*     5.1     1.3    -      -       +      +
    335A  VAL*     3.9    36.8    -      -       +      +
    336A  GLY*     3.8    23.8    -      -       -      +
    338A  PHE*     4.6     4.3    -      -       +      -
    339A  ILE*     4.3    15.0    -      -       +      -
----------------------------------------------------------
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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