Contacts of the helix formed by residues 167 - 196 (chain B) in PDB entry 3KQG


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 LEU 167 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    168B  ASN*     1.3    85.2    +      -       +      +
    169B  THR*     2.8    24.3    +      -       +      +
    170B  LYS*     2.9    17.8    +      -       -      +
    171B  ILE*     3.4    11.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 168 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    167B  LEU*     1.3    86.7    -      -       +      +
    169B  THR*     1.3    64.6    +      -       +      +
    171B  ILE*     2.9    22.6    +      -       +      +
    172B  ARG*     3.1    51.4    +      -       -      +
    167C  LEU*     5.6     4.0    -      -       -      +
    170C  LYS*     4.0    22.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 169 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    167B  LEU*     2.8    24.4    +      -       +      +
    168B  ASN*     1.3    80.2    -      -       +      +
    170B  LYS*     1.3    69.4    +      -       -      +
    172B  ARG*     3.9     6.0    +      -       -      +
    173B  ALA*     3.8    13.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 170 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    171A  ILE*     5.3    12.0    -      -       +      +
    175A  GLN*     3.0    38.9    +      -       -      +
    167B  LEU      2.9    11.7    +      -       -      +
    169B  THR*     1.3    81.2    +      -       -      +
    171B  ILE*     1.3    61.8    +      -       -      +
    173B  ALA*     3.2    24.9    -      -       +      +
    174B  LEU*     3.4    15.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 171 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    171A  ILE*     4.6    16.6    -      -       +      -
    167B  LEU      3.4     7.5    +      -       -      +
    168B  ASN*     2.9    20.5    +      -       -      +
    170B  LYS*     1.3    74.7    -      -       -      +
    172B  ARG*     1.3    69.6    +      -       +      +
    173B  ALA      2.9     5.2    +      -       -      -
    174B  LEU*     3.1    11.7    +      -       +      +
    175B  GLN*     2.9    28.9    +      -       +      +
    170C  LYS*     4.2    31.0    -      -       +      -
    171C  ILE*     4.2    17.7    -      -       +      -
    174C  LEU*     3.3    34.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 172 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    168B  ASN*     3.1    52.2    +      -       -      +
    169B  THR*     4.4     5.2    -      -       -      +
    171B  ILE*     1.3    80.6    -      -       +      +
    173B  ALA*     1.3    57.1    -      -       -      +
    175B  GLN*     3.5    26.2    +      -       -      +
    176B  GLY*     2.9    23.0    +      -       -      -
    170C  LYS*     5.3     7.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 173 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    169B  THR      3.8     5.5    +      -       -      +
    170B  LYS*     3.2    28.0    -      -       +      +
    171B  ILE      2.9     0.2    -      -       -      -
    172B  ARG*     1.3    76.0    -      -       -      +
    174B  LEU*     1.3    67.5    +      -       +      +
    176B  GLY*     3.2     2.5    +      -       -      -
    177B  SER*     3.0    25.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 174 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    171A  ILE*     4.3    16.4    -      -       +      +
    174A  LEU*     4.1    30.7    -      -       +      -
    175A  GLN*     3.5    36.3    -      -       +      +
    178A  LEU*     3.6    21.9    -      -       +      +
    170B  LYS*     3.4    14.6    +      -       +      +
    171B  ILE*     3.1    12.2    +      -       +      +
    173B  ALA*     1.3    80.2    -      -       +      +
    175B  GLN*     1.3    64.1    +      -       -      +
    177B  SER*     3.2     6.0    +      -       -      +
    178B  LEU*     3.0    27.5    +      -       -      +
    174C  LEU*     4.4    15.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 175 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    171B  ILE*     2.9    16.8    +      -       +      +
    172B  ARG*     3.5    31.2    +      -       -      +
    174B  LEU*     1.3    75.9    -      -       -      +
    176B  GLY*     1.3    62.8    +      -       -      +
    178B  LEU*     3.3     4.0    +      -       -      +
    179B  GLU*     3.1    39.8    +      -       -      +
    174C  LEU*     4.0    19.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 176 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    172B  ARG      2.9    15.4    +      -       -      -
    173B  ALA*     3.2     2.9    +      -       -      -
    175B  GLN*     1.3    73.8    -      -       -      +
    177B  SER*     1.3    66.6    +      -       -      +
    179B  GLU*     2.9    32.6    -      -       -      +
    180B  ASN*     3.0    16.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 177 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    178A  LEU*     3.1    26.2    -      -       -      +
    173B  ALA      3.0    12.8    +      -       -      -
    174B  LEU*     3.2     5.4    +      -       -      +
    176B  GLY*     1.3    73.6    -      -       -      +
    178B  LEU*     1.3    58.4    +      -       -      +
    180B  ASN*     3.4    13.1    +      -       -      +
    181B  MET*     3.1    34.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 178 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    174A  LEU*     6.6     0.2    -      -       +      -
    178A  LEU*     3.5    30.7    -      -       +      -
    174B  LEU      3.0    19.0    +      -       -      +
    175B  GLN*     3.4     5.2    -      -       -      +
    177B  SER*     1.3    75.4    +      -       -      +
    179B  GLU*     1.3    64.0    +      -       -      +
    181B  MET*     3.3     6.5    +      -       +      -
    182B  SER*     3.1    19.6    +      -       -      -
    174C  LEU*     3.8    33.9    -      -       +      +
    177C  SER*     3.8    28.3    -      -       -      -
    178C  LEU*     4.1    10.5    -      -       +      +
    181C  MET*     3.4    33.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 179 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    175B  GLN*     3.1    33.4    +      -       -      +
    176B  GLY*     2.9    25.9    -      -       -      +
    178B  LEU*     1.3    75.7    -      -       -      +
    180B  ASN*     1.3    65.9    +      -       -      +
    182B  SER*     3.5     8.8    -      -       -      -
    183B  LYS*     3.1    36.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 180 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    176B  GLY      3.0    17.8    +      -       -      +
    177B  SER*     3.4    16.9    -      -       -      +
    178B  LEU      3.2     0.2    -      -       -      -
    179B  GLU*     1.3    79.4    -      -       -      +
    181B  MET*     1.3    59.9    +      -       +      +
    183B  LYS*     3.3    15.9    +      -       -      +
    184B  LEU*     3.0    26.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 181 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    178A  LEU*     3.4    55.9    -      -       +      +
    181A  MET*     3.7    12.8    -      -       +      -
    182A  SER*     3.6    26.5    -      -       -      +
    185A  LEU*     3.8    11.6    -      -       +      +
    177B  SER*     3.1    22.9    +      -       -      +
    178B  LEU*     3.3    14.6    +      -       +      +
    180B  ASN*     1.3    73.2    -      -       +      +
    182B  SER*     1.3    56.7    +      -       -      +
    184B  LEU*     2.9    11.3    +      -       +      +
    185B  LEU*     2.6    37.6    +      -       -      +
    181C  MET*     3.4    17.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 182 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    178B  LEU      3.1    13.4    +      -       -      -
    179B  GLU*     3.5    14.9    +      -       -      -
    180B  ASN      3.3     0.2    -      -       -      -
    181B  MET*     1.3    76.5    -      -       -      +
    183B  LYS*     1.3    58.7    +      -       -      +
    185B  LEU*     3.7     5.8    -      -       -      +
    186B  LYS*     2.9    33.1    +      -       -      +
    181C  MET*     3.8    17.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 183 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    179B  GLU*     3.1    25.4    +      -       -      +
    180B  ASN*     3.6    15.8    +      -       -      +
    181B  MET      3.1     0.2    -      -       -      -
    182B  SER*     1.3    78.3    -      -       -      +
    184B  LEU*     1.3    61.5    +      -       -      +
    186B  LYS*     3.4    19.2    +      -       -      +
    187B  ARG*     3.0    24.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 184 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    182A  SER*     5.8     3.1    -      -       -      +
    185A  LEU*     4.1    25.4    -      -       +      -
    186A  LYS*     6.2     5.2    -      -       +      +
    189A  ASN*     5.6     3.4    -      -       -      +
    180B  ASN      3.0    12.9    +      -       -      +
    181B  MET*     2.9    13.8    +      -       +      +
    183B  LYS*     1.3    75.8    -      -       -      +
    185B  LEU*     1.3    59.0    +      -       -      +
    187B  ARG*     3.3    17.0    +      -       -      +
    188B  GLN*     3.1    47.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 185 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    185A  LEU*     3.5    28.5    -      -       +      -
    181B  MET      2.6    20.4    +      -       -      +
    182B  SER*     3.7     5.8    -      -       -      +
    184B  LEU*     1.3    71.8    -      -       -      +
    186B  LYS*     1.3    65.0    +      -       -      +
    188B  GLN*     3.3     5.0    +      -       -      +
    189B  ASN      3.0    17.7    +      -       -      -
    181C  MET*     3.6    39.0    -      -       +      +
    184C  LEU*     3.9    13.2    -      -       +      -
    185C  LEU*     3.8    23.8    -      -       +      +
    188C  GLN*     3.1    46.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 186 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    182B  SER*     2.9    21.5    +      -       -      +
    183B  LYS*     3.7    17.9    -      -       -      +
    185B  LEU*     1.3    75.9    -      -       -      +
    187B  ARG*     1.3    57.5    +      -       -      +
    189B  ASN*     3.1    10.0    +      -       -      +
    190B  ASP*     3.0    41.6    +      -       -      +
    325B  PRO*     5.0    15.5    +      -       +      +
    188C  GLN*     5.0     0.4    -      -       -      +
    179F  GLU*     5.6     0.6    +      -       -      -
    183F  LYS*     3.3    27.9    -      -       -      +
    186F  LYS*     5.6     2.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 187 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    183B  LYS      3.0    18.4    +      -       -      +
    184B  LEU*     3.5    17.9    -      -       +      +
    185B  LEU      3.2     0.2    -      -       -      -
    186B  LYS*     1.3    78.4    -      -       +      +
    188B  GLN*     1.3    62.0    +      -       +      +
    190B  ASP*     3.3     5.2    +      -       -      +
    191B  ILE*     3.3    30.0    +      -       +      +
    201B  TYR*     4.3    15.2    +      -       -      -
    323B  TYR*     3.5    35.5    -      -       +      +
    325B  PRO*     5.7     2.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 188 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    185A  LEU*     3.0    35.2    +      -       -      +
    188A  GLN*     3.2    29.8    -      -       -      +
    189A  ASN*     3.5    28.4    +      -       -      +
    192A  LEU*     3.6    19.9    -      -       +      +
    184B  LEU*     3.1    39.2    +      -       +      +
    185B  LEU*     3.7     5.8    -      -       -      +
    186B  LYS      3.3     0.2    -      -       -      -
    187B  ARG*     1.3    77.0    -      -       +      +
    189B  ASN*     1.3    58.2    +      -       -      +
    191B  ILE*     3.4     4.1    +      -       +      -
    192B  LEU*     2.9    29.3    +      -       -      +
    188C  GLN*     3.9    10.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 189 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    185B  LEU      3.0     6.4    +      -       -      +
    186B  LYS*     3.1    11.6    +      -       -      +
    188B  GLN*     1.3    74.3    -      -       -      +
    190B  ASP*     1.3    65.6    +      -       -      +
    192B  LEU*     3.2     4.9    +      -       -      +
    193B  GLN*     2.8    68.6    +      -       -      +
    188C  GLN*     3.4    37.7    +      -       -      +
    191C  ILE*     5.6     0.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 190 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    186B  LYS*     3.0    29.3    +      -       -      +
    187B  ARG*     3.3     2.5    +      -       -      +
    189B  ASN*     1.3    81.0    +      -       -      +
    191B  ILE*     1.3    62.3    +      -       -      +
    193B  GLN*     3.4     7.4    +      -       -      +
    194B  VAL*     3.4    26.5    +      -       -      +
    206B  PHE*     4.1     3.1    -      -       +      -
    323B  TYR*     2.8    39.6    +      -       +      +
    324B  VAL      5.4     0.4    -      -       -      -
    325B  PRO*     3.4    22.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 191 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    189A  ASN*     5.5     1.8    -      -       -      +
    192A  LEU*     3.7    19.5    -      -       +      -
    193A  GLN*     4.6     5.4    -      -       -      +
    196A  SER*     3.7    23.1    -      -       -      +
    187B  ARG*     3.3    25.2    +      -       +      +
    188B  GLN*     3.7     7.9    -      -       +      +
    189B  ASN      3.2     0.4    -      -       -      -
    190B  ASP*     1.3    74.5    -      -       -      +
    192B  LEU*     1.3    60.2    +      -       -      +
    194B  VAL*     3.2     2.9    +      -       -      +
    195B  VAL*     2.9    34.1    +      -       +      +
    201B  TYR*     3.5    51.6    -      -       +      +
    206B  PHE*     4.0    11.2    -      -       +      -
    323B  TYR*     4.8     7.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 192 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    188A  GLN*     5.9     0.2    -      -       -      +
    192A  LEU*     4.2    13.4    -      -       +      +
    188B  GLN      2.9    18.5    +      -       -      +
    189B  ASN*     3.6     4.9    -      -       -      +
    191B  ILE*     1.3    78.8    -      -       -      +
    193B  GLN*     1.3    63.9    +      -       -      +
    195B  VAL*     4.5     2.5    -      -       +      -
    196B  SER*     2.6    49.8    +      -       -      +
    188C  GLN*     3.5    45.8    -      -       +      +
    191C  ILE*     4.1    15.5    -      -       +      -
    192C  LEU*     3.8    34.3    -      -       +      +
    195C  VAL*     4.9     7.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 193 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    189B  ASN*     2.8    53.9    +      -       -      +
    190B  ASP*     3.7     7.9    -      -       -      +
    191B  ILE      3.2     0.2    -      -       -      -
    192B  LEU*     1.3    88.9    -      -       -      +
    194B  VAL*     1.3    62.0    +      -       +      +
    196B  SER*     3.5     9.1    -      -       -      -
    197B  GLN*     3.5    28.6    +      -       -      +
    191C  ILE*     4.6     5.9    -      -       -      +
    201C  TYR*     3.8    29.5    -      -       -      +
    202C  PHE*     5.9     0.3    -      -       -      -
    203C  LYS      5.5     1.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 194 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    190B  ASP      3.4    12.1    +      -       -      +
    191B  ILE      3.2     1.8    +      -       -      -
    193B  GLN*     1.3    75.0    -      -       +      +
    195B  VAL*     1.3    62.0    +      -       -      +
    196B  SER      3.1     1.6    -      -       -      -
    197B  GLN*     2.9    32.1    +      -       -      +
    199B  TRP*     3.5    33.5    +      -       +      +
    206B  PHE*     3.6    37.7    -      -       +      -
    321B  ARG*     3.6    29.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 195 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    192A  LEU*     5.0     5.2    -      -       +      -
    195A  VAL*     4.3    18.6    -      -       +      +
    196A  SER*     3.3    40.8    -      -       -      +
    191B  ILE*     2.9    26.9    +      -       +      +
    192B  LEU*     4.0     6.1    -      -       +      +
    194B  VAL*     1.3    75.6    -      -       -      +
    196B  SER*     1.3    56.2    +      -       -      +
    197B  GLN      3.1     0.2    -      -       -      -
    198B  GLY*     3.2    15.9    +      -       -      -
    199B  TRP      3.4    23.8    -      -       -      +
    200B  LYS      4.4     1.3    -      -       -      -
    201B  TYR*     4.1     9.4    -      -       +      +
    206B  PHE*     5.0     1.8    -      -       +      -
    195C  VAL*     4.6    10.9    -      -       +      +
    200C  LYS*     5.2     0.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 196 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    192B  LEU*     2.6    34.6    +      -       -      +
    193B  GLN*     3.5    10.7    -      -       -      -
    194B  VAL      3.1     0.2    -      -       -      -
    195B  VAL*     1.3    76.1    -      -       -      +
    197B  GLN*     1.3    56.7    +      -       -      +
    198B  GLY      3.4     1.8    -      -       -      -
    191C  ILE*     4.2     2.4    -      -       -      +
    195C  VAL*     3.3    25.6    -      -       -      +
    200C  LYS*     3.3    14.4    -      -       -      +
    201C  TYR*     3.0    50.6    +      -       -      +
    241C  PHE*     4.6     0.5    -      -       -      -
----------------------------------------------------------
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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