Contacts of the helix formed by residues 167 - 193 (chain B) in PDB entry 2BAP


Residue contacts within the protein are derived with the CSU software (Sobolev V., Sorokine A., Prilusky J., Abola E.E. and Edelman M. (1999) Automated analysis of interatomic contacts in proteins. Bioinformatics, 15, 327-332). A short description of the analytical approach is given at the end of the page.
For CSU analysis of other PDB entry

Note:
Non-standard 3 letter residue codes indicate a heterogroup. To identify and analyse, use LPC software

Legend:
Dist - nearest distance (Å) between atoms of two residues
Surf - contact surface area (Å2) between two residues
HB   - hydrophilic-hydrophilic contact (hydrogen bond)
Arom - aromatic-aromatic contact
Phob - hydrophobic-hydrophobic contact
DC   - hydrophobic-hydrophilic contact (destabilizing contact)
+/-  - indicates presence/absence of a specific contacts
*    - indicates residues forming contacts  by their side chain
       (including CA atoms)
Residues in contact with PRO 167 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    166B  ASN*     1.4   105.8    -      -       +      +
    168B  VAL*     1.3    65.2    +      -       -      +
    169B  SER*     3.4    21.5    +      -       -      +
    170B  TRP*     3.6    10.6    +      -       +      +
    171B  VAL*     3.4    16.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 168 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    167B  PRO*     1.3    74.0    -      -       -      +
    169B  SER*     1.3    64.7    +      -       -      +
    171B  VAL*     3.2    11.6    +      -       +      +
    172B  GLN*     3.2    34.1    +      -       +      +
    218B  ASN*     4.1    34.1    -      -       +      +
    220B  PHE*     5.0     2.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 169 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    167B  PRO*     3.4    18.9    -      -       -      +
    168B  VAL*     1.3    76.0    -      -       -      +
    170B  TRP*     1.3    64.1    +      -       -      +
    172B  GLN*     3.1    29.8    +      -       -      +
    173B  THR*     3.1    17.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with TRP 170 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    135B  SER*     3.5    35.8    -      -       -      +
    136B  ALA*     3.5    27.4    -      -       +      +
    139B  TYR*     3.8    24.9    -      +       -      -
    159B  LEU*     5.1     2.9    -      -       +      -
    162B  SER*     3.8    18.4    -      -       -      -
    163B  LEU*     3.9    37.9    -      -       +      -
    166B  ASN*     3.2    51.5    +      -       +      +
    167B  PRO*     3.6     7.5    +      -       +      +
    168B  VAL      3.3     0.6    -      -       -      -
    169B  SER*     1.3    77.2    +      -       -      +
    171B  VAL*     1.3    66.5    +      -       -      +
    173B  THR*     3.4    15.2    +      -       -      -
    174B  PHE*     3.4    11.7    +      +       +      +
----------------------------------------------------------
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Residues in contact with VAL 171 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    163B  LEU*     4.2    33.0    -      -       +      +
    167B  PRO      3.4    18.6    -      -       -      +
    168B  VAL*     3.3    12.3    -      -       -      +
    169B  SER      3.2     0.2    -      -       -      -
    170B  TRP*     1.3    78.8    -      -       +      +
    172B  GLN*     1.3    57.6    +      -       +      +
    174B  PHE*     3.1     7.1    +      -       -      +
    175B  GLY*     2.9    23.0    +      -       -      -
    214B  ALA      5.9     1.3    -      -       -      +
    215B  PHE*     3.5    36.0    -      -       +      +
    218B  ASN*     4.0    26.2    -      -       -      +
    220B  PHE*     4.3     3.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 172 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    168B  VAL*     3.3    18.7    -      -       +      +
    169B  SER*     3.1    26.8    +      -       -      +
    171B  VAL*     1.3    77.6    -      -       -      +
    173B  THR*     1.3    57.3    +      -       -      +
    175B  GLY*     3.1    17.0    +      -       -      -
    177B  GLU*     5.1     0.5    -      -       -      +
    220B  PHE*     3.5    55.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with THR 173 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    135B  SER*     5.2     9.3    +      -       -      +
    136B  ALA*     4.5    12.1    -      -       +      +
    137B  MET*     4.5    30.2    -      -       +      +
    140B  ILE*     3.5    15.6    -      -       -      +
    169B  SER      3.1    14.9    +      -       -      -
    170B  TRP*     3.4     9.7    +      -       -      -
    171B  VAL      3.3     0.6    -      -       -      -
    172B  GLN*     1.3    74.1    -      -       -      +
    174B  PHE*     1.3    62.0    +      -       -      +
    177B  GLU*     3.6     5.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 174 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    136B  ALA*     4.3    12.5    -      -       +      +
    139B  TYR*     3.8    28.3    -      +       +      -
    140B  ILE*     3.7    22.3    -      -       +      +
    143B  LEU*     3.9    15.3    -      -       +      -
    159B  LEU*     3.9    16.6    -      -       +      -
    163B  LEU*     4.6    15.9    -      -       +      -
    170B  TRP*     3.4    10.9    +      +       +      +
    171B  VAL*     3.1    12.0    +      -       -      +
    173B  THR*     1.3    78.4    -      -       -      +
    175B  GLY*     1.3    71.9    +      -       -      +
    177B  GLU*     3.1     5.1    -      -       -      +
    178B  GLY*     2.9    53.5    +      -       -      -
    179B  LEU*     3.7     4.9    -      -       -      -
    182B  LEU*     3.8    17.5    -      -       +      -
    215B  PHE*     4.5    15.0    -      +       -      -
----------------------------------------------------------
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Residues in contact with GLY 175 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    171B  VAL      2.9    12.8    +      -       -      -
    172B  GLN      3.1    15.9    +      -       -      -
    174B  PHE*     1.3    83.7    -      -       -      +
    176B  ALA*     1.3    59.6    +      -       -      -
    177B  GLU*     3.7     7.9    -      -       -      -
    179B  LEU      3.6     7.1    +      -       -      -
    215B  PHE*     3.4    23.4    -      -       -      -
    220B  PHE*     4.0    16.4    -      -       -      -
    224B  THR*     4.6     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 176 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    175B  GLY*     1.3    72.1    -      -       -      -
    177B  GLU*     1.3    63.2    +      -       +      +
    179B  LEU*     3.3     7.6    -      -       +      +
    180B  ALA*     2.7    36.1    +      -       -      +
    220B  PHE*     4.9     1.6    -      -       -      -
    224B  THR*     3.7    24.9    -      -       +      +
    228B  THR*     5.6     4.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 177 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    137B  MET*     6.0     0.2    -      -       -      +
    140B  ILE*     3.8    11.5    -      -       +      +
    144B  ARG*     2.8    39.5    +      -       -      +
    172B  GLN      5.1     0.2    -      -       -      +
    173B  THR      3.6    10.4    -      -       -      +
    174B  PHE      3.1    19.8    -      -       -      +
    175B  GLY*     3.7     3.9    -      -       -      -
    176B  ALA*     1.3    92.9    +      -       +      +
    178B  GLY*     1.3    60.2    +      -       -      +
    180B  ALA*     3.3     6.5    -      -       -      +
    181B  SER*     3.1    15.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 178 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    140B  ILE*     4.2     8.6    -      -       -      +
    174B  PHE*     2.9    49.1    +      -       -      -
    177B  GLU*     1.3    75.2    +      -       -      +
    179B  LEU*     1.3    67.6    +      -       -      +
    181B  SER*     2.9    18.8    +      -       -      -
    182B  LEU*     3.1    10.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 179 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    174B  PHE*     3.7     4.7    -      -       -      -
    175B  GLY      3.6    14.7    +      -       -      +
    176B  ALA*     3.3     8.3    -      -       -      +
    178B  GLY*     1.3    73.3    -      -       -      +
    180B  ALA*     1.3    66.9    +      -       -      +
    182B  LEU*     3.0    20.7    +      -       +      +
    183B  LEU*     3.1    30.4    +      -       +      +
    212B  LEU*     3.7    30.7    -      -       +      -
    215B  PHE*     3.7    23.1    -      -       +      -
    224B  THR*     3.1    43.7    -      -       +      +
    225B  MET*     4.0     8.3    -      -       -      +
    228B  THR*     3.8    12.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 180 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    144B  ARG*     4.9     2.5    -      -       -      +
    176B  ALA      2.7    16.8    +      -       -      +
    177B  GLU*     3.3    14.4    -      -       -      +
    179B  LEU*     1.3    71.9    -      -       -      +
    181B  SER*     1.3    51.7    +      -       -      +
    183B  LEU*     2.9    16.0    +      -       -      +
    184B  ASP*     2.7    48.6    +      -       -      +
    228B  THR*     5.5     4.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 181 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    140B  ILE      4.6     2.3    +      -       -      -
    143B  LEU*     4.1    24.4    -      -       -      -
    144B  ARG*     2.9    37.8    +      -       -      +
    177B  GLU      3.1     8.0    +      -       -      -
    178B  GLY*     2.9    10.0    +      -       -      -
    180B  ALA*     1.3    76.2    -      -       -      +
    182B  LEU*     1.3    58.4    +      -       -      +
    184B  ASP*     3.7    13.8    +      -       -      +
    185B  ILE*     3.2    32.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 182 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    143B  LEU*     4.5     6.3    -      -       +      -
    156B  LEU*     3.9    20.9    -      -       +      -
    159B  LEU*     4.2    13.7    -      -       +      -
    163B  LEU*     5.5     1.1    -      -       +      -
    174B  PHE*     3.8    30.5    -      -       +      -
    178B  GLY      3.1     6.2    +      -       -      +
    179B  LEU*     3.0    13.3    +      -       +      +
    181B  SER*     1.3    74.8    -      -       -      +
    183B  LEU*     1.3    61.9    +      -       +      +
    185B  ILE*     3.3    10.3    +      -       +      +
    186B  LEU*     3.0    24.8    +      -       -      +
    208B  ILE*     3.5    45.2    -      -       +      +
    211B  CYS*     4.3    18.2    -      -       +      -
    212B  LEU*     5.2    10.5    -      -       +      -
    215B  PHE*     6.1     3.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 183 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    179B  LEU*     3.5    28.3    -      -       +      +
    180B  ALA*     2.9     8.1    +      -       -      +
    182B  LEU*     1.3    76.5    -      -       -      +
    184B  ASP*     1.3    59.4    +      -       -      +
    186B  LEU*     2.9    10.3    +      -       +      +
    187B  LYS*     2.6    44.3    +      -       -      +
    212B  LEU*     4.3    19.5    -      -       +      -
    225B  MET*     3.9    24.5    -      -       +      -
    228B  THR*     3.9    31.2    -      -       +      +
    230B  GLU*     5.1     2.0    -      -       +      -
    231B  GLY*     4.6     6.7    -      -       -      +
    234B  LEU*     3.9    26.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 184 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    180B  ALA*     2.7    40.8    +      -       -      +
    181B  SER*     3.7    12.2    +      -       -      +
    183B  LEU*     1.3    73.3    -      -       -      +
    185B  ILE*     1.3    59.2    +      -       +      +
    187B  LYS*     3.4    23.4    +      -       -      +
    188B  ARG*     3.2    21.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 185 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    143B  LEU*     3.8    42.8    -      -       +      +
    152B  LEU*     4.1    27.6    -      -       +      -
    156B  LEU*     5.3     2.9    -      -       +      -
    181B  SER      3.2    17.7    +      -       -      +
    182B  LEU*     3.3    10.0    +      -       -      +
    183B  LEU      3.1     0.6    -      -       -      -
    184B  ASP*     1.3    74.8    -      -       +      +
    186B  LEU*     1.3    54.3    +      -       -      +
    188B  ARG*     3.0    22.5    +      -       -      +
    189B  LEU*     2.7    59.1    +      -       +      +
    208B  ILE*     3.9     8.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 186 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    182B  LEU      3.0    11.3    +      -       -      +
    183B  LEU*     2.9    12.0    +      -       +      +
    185B  ILE*     1.3    75.5    -      -       -      +
    187B  LYS*     1.3    61.6    +      -       -      +
    189B  LEU*     3.4     7.6    +      -       +      +
    190B  HIS*     2.9    53.8    +      -       +      +
    205B  GLN*     3.8    27.8    -      -       +      +
    208B  ILE*     3.8    30.3    -      -       +      -
    209B  ILE*     4.1    20.4    -      -       +      -
    212B  LEU*     4.6     6.3    -      -       +      -
    234B  LEU*     4.2    25.8    -      -       +      +
    238B  ALA*     6.1     0.2    -      -       +      -
    246B  MET*     4.9     4.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 187 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    183B  LEU*     2.6    23.7    +      -       -      +
    184B  ASP*     3.4    24.5    +      -       -      +
    186B  LEU*     1.3    71.1    -      -       -      +
    188B  ARG*     1.3    59.3    +      -       -      +
    190B  HIS*     2.9    23.4    +      -       -      +
    191B  ASP*     3.1    23.2    +      -       -      +
    230B  GLU*     3.7    40.5    -      -       +      +
    234B  LEU*     4.2    19.8    -      -       +      +
    237B  ARG*     5.5     4.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 188 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    146B  GLY*     5.7     1.0    -      -       -      -
    148B  ARG*     2.9    56.5    -      -       -      +
    149B  ASP      5.6     1.4    -      -       -      +
    152B  LEU*     5.3     5.9    -      -       -      +
    184B  ASP      3.2    11.8    +      -       -      +
    185B  ILE*     3.0    24.3    +      -       -      +
    187B  LYS*     1.3    79.3    -      -       -      +
    189B  LEU*     1.3    82.0    +      -       -      +
    191B  ASP*     3.3    19.7    +      -       +      +
    192B  GLU*     3.6    12.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 189 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    152B  LEU*     5.3     2.9    -      -       +      -
    185B  ILE*     2.7    28.4    +      -       +      +
    186B  LEU*     3.4     8.3    -      -       -      +
    188B  ARG*     1.3    92.7    -      -       -      +
    190B  HIS*     1.3    62.1    +      -       -      +
    192B  GLU*     3.7     4.7    +      -       -      +
    193B  LYS*     3.4    20.6    +      -       -      +
    201B  ASP      5.4     4.0    -      -       -      +
    204B  ASN*     4.6    15.3    -      -       +      -
    205B  GLN*     3.7    42.4    -      -       +      +
    208B  ILE*     3.8    24.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with HIS 190 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    186B  LEU*     2.9    44.5    +      -       +      +
    187B  LYS      2.9     8.8    +      -       -      +
    189B  LEU*     1.3    77.9    -      -       -      +
    191B  ASP*     1.3    61.8    +      -       -      +
    193B  LYS*     3.0    35.7    +      -       -      +
    205B  GLN*     4.0    15.3    +      -       -      -
    234B  LEU*     3.6    22.2    +      -       +      +
    237B  ARG*     3.5    65.8    +      -       +      +
    238B  ALA*     4.8     3.2    +      -       -      -
    246B  MET*     5.8     0.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 191 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    187B  LYS*     3.1    21.2    +      -       -      +
    188B  ARG*     3.3    13.5    +      -       +      +
    190B  HIS*     1.3    79.3    -      -       -      +
    192B  GLU*     1.3    57.5    +      -       -      +
    193B  LYS      5.0     0.9    -      -       -      -
    237B  ARG*     5.4     4.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 192 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    188B  ARG      3.6     8.3    +      -       -      +
    189B  LEU*     4.2     6.5    -      -       -      +
    190B  HIS      3.2     0.4    -      -       -      -
    191B  ASP*     1.3    77.9    -      -       -      +
    193B  LYS*     1.3    63.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 193 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    189B  LEU      3.4    14.8    +      -       -      +
    190B  HIS*     3.0    27.5    +      -       +      +
    191B  ASP      5.0     1.1    -      -       -      -
    192B  GLU*     1.3    83.1    -      -       +      +
    202B  SER*     5.9     2.9    -      -       -      -
    205B  GLN*     4.5    22.4    -      -       -      +
    240B  ASP*     5.5     7.0    -      -       -      -
----------------------------------------------------------
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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