Contacts of the helix formed by residues 221 - 247 (chain C) in PDB entry 3L73


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 PHE 221 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     19C  LEU*     3.0    57.7    -      -       +      -
     20C  ILE      3.8     3.8    +      -       -      +
     22C  LEU*     3.0    37.4    +      -       +      +
     24C  ALA*     4.8     1.8    -      -       +      -
    219C  ILE      3.5     0.8    +      -       -      -
    220C  PRO*     1.3    70.4    -      -       -      +
    222C  HIS*     1.3    57.7    +      -       -      +
    225C  TYR*     2.6    62.6    +      +       +      -
    226C  SER*     3.1    25.0    +      -       -      -
    229C  ASP*     3.8    15.5    -      -       +      -
   2002C   UQ      3.5    43.1    -      +       +      -
----------------------------------------------------------
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Residues in contact with HIS 222 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    436A  ARG*     2.8    40.2    +      -       -      -
   2008A  PEE      3.4    53.2    +      -       +      +
     19C  LEU      3.9    16.2    -      -       -      +
     20C  ILE*     3.5    20.9    +      -       +      +
    220C  PRO*     3.4     7.4    -      -       -      +
    221C  PHE*     1.3    78.6    -      -       -      +
    223C  PRO*     1.3    78.4    -      -       +      +
    224C  TYR      3.5     0.9    -      -       -      -
    226C  SER*     2.8    27.7    +      -       -      +
    227C  PHE*     4.0     8.3    -      +       -      -
----------------------------------------------------------
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Residues in contact with PRO 223 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    433A  ASP*     3.6    19.3    -      -       -      +
    435A  ASN*     4.2    21.1    -      -       +      +
    436A  ARG*     4.0    10.5    -      -       -      -
    439A  SER*     6.1     0.4    -      -       -      +
    222C  HIS*     1.3    92.5    -      -       +      +
    224C  TYR*     1.3    71.9    +      -       +      +
    225C  TYR      3.5     0.2    -      -       -      -
    226C  SER*     3.2     9.2    -      -       -      +
    227C  PHE*     2.8    51.3    +      -       +      +
    226D  LYS*     4.2    22.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 224 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    433A  ASP*     2.6    41.7    +      -       +      -
    435A  ASN*     2.8    27.8    +      -       +      -
    219C  ILE*     3.4    44.4    -      -       +      -
    220C  PRO*     3.6    16.8    -      -       +      +
    221C  PHE      3.4     1.2    +      -       -      -
    222C  HIS      3.5     0.2    -      -       -      -
    223C  PRO*     1.3    82.8    -      -       +      +
    225C  TYR*     1.3    59.0    +      -       +      +
    227C  PHE*     3.9     0.3    -      -       -      +
    228C  LYS*     3.1    14.9    +      -       -      +
    226D  LYS*     3.9    12.3    -      -       +      -
    227D  TRP*     2.9    51.1    +      +       +      +
    229D  VAL*     4.2     6.8    -      -       -      +
    230D  LEU*     3.8    26.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 225 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     24C  ALA*     3.4    33.7    -      -       +      -
     25C  PRO      2.5    21.7    +      -       -      -
     26C  SER      3.6     6.2    +      -       -      -
     28C  ILE*     2.9    33.7    +      -       +      +
    219C  ILE*     3.7    15.3    -      -       +      -
    221C  PHE*     2.6    43.8    +      -       +      +
    224C  TYR*     1.3    72.7    -      -       +      +
    226C  SER*     1.3    64.5    +      -       -      -
    227C  PHE      3.1     1.1    -      -       -      -
    228C  LYS*     3.7    31.2    -      -       +      -
    229C  ASP*     2.9    32.4    +      -       -      +
   2002C   UQ      4.0     7.2    -      -       -      -
    227D  TRP*     3.5    23.6    -      +       -      -
----------------------------------------------------------
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Residues in contact with SER 226 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   2008A  PEE      5.3     9.2    -      -       -      -
     19C  LEU      5.4     0.4    -      -       -      -
    221C  PHE*     3.1    25.5    +      -       -      -
    222C  HIS*     2.8    35.3    +      -       -      -
    223C  PRO*     3.0    15.1    +      -       -      +
    225C  TYR*     1.3    77.6    -      -       -      +
    227C  PHE*     1.3    65.3    +      -       -      +
    229C  ASP*     4.0     2.7    -      -       -      +
    230C  ILE*     3.2    29.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 227 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   2008A  PEE      4.9     8.1    -      -       +      -
    222C  HIS*     4.0    14.6    -      +       -      -
    223C  PRO*     2.8    48.5    +      -       +      +
    224C  TYR      3.9     2.0    -      -       -      +
    226C  SER*     1.3    80.4    +      -       -      +
    228C  LYS*     1.3    65.4    +      -       -      +
    230C  ILE*     3.2     9.1    +      -       +      +
    231C  LEU*     3.0    24.4    +      -       -      +
    219D  LEU*     5.7     7.0    -      -       +      +
    222D  MET*     4.0    41.5    -      -       +      -
    223D  LYS*     4.5    15.5    -      -       +      +
    226D  LYS*     4.1    25.6    -      -       +      -
    227D  TRP*     5.2     2.5    -      -       +      +
   2005E  PEE      3.5    32.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 228 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     28C  ILE      3.7    14.4    +      -       -      -
     29C  SER*     3.6    23.4    -      -       -      +
     30C  ALA*     4.2     3.7    -      -       -      +
     33C  ASN*     3.1    29.8    +      -       -      +
    224C  TYR      3.1    16.5    +      -       -      +
    225C  TYR*     3.7    29.6    -      -       +      +
    227C  PHE*     1.3    79.2    -      -       -      +
    229C  ASP*     1.3    59.8    +      -       -      +
    231C  LEU*     3.4     4.0    +      -       -      +
    232C  GLY      3.0    20.6    +      -       -      -
    223D  LYS*     4.0    37.3    -      -       -      +
    227D  TRP*     4.5     7.5    -      -       +      +
   2003D  CDL      4.2    21.3    +      -       -      +
     72F  HIS*     6.0     2.0    +      -       -      -
   2004G  CDL      5.2     2.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 229 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     32C  TRP      4.9     1.0    -      -       -      +
     33C  ASN*     3.5    21.2    +      -       -      +
     36C  SER*     3.2    28.7    +      -       -      +
     37C  LEU*     5.1     1.9    -      -       -      +
    221C  PHE*     3.8    11.1    -      -       +      -
    225C  TYR*     2.9    24.9    +      -       -      +
    226C  SER*     4.0     3.8    -      -       -      +
    228C  LYS*     1.3    79.6    -      -       -      +
    230C  ILE*     1.3    55.0    +      -       +      +
    232C  GLY*     2.9     1.7    +      -       -      -
    233C  LEU*     2.7    34.9    +      -       -      +
   2002C   UQ      3.0    27.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 230 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   2008A  PEE      3.6    31.9    -      -       +      -
    226C  SER*     3.2    17.9    +      -       -      +
    227C  PHE*     3.2     8.3    +      -       +      +
    229C  ASP*     1.3    77.8    -      -       +      +
    231C  LEU*     1.3    63.8    +      -       -      +
    233C  LEU*     3.3    13.5    +      -       +      +
    234C  THR*     3.1    22.0    +      -       -      +
    219D  LEU*     3.7    32.8    -      -       +      -
   2005E  PEE      3.8    27.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 231 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    227C  PHE      3.0    12.0    +      -       -      +
    228C  LYS*     3.5    10.1    -      -       -      +
    230C  ILE*     1.3    78.1    -      -       -      +
    232C  GLY*     1.3    63.8    +      -       -      +
    234C  THR*     2.9    26.0    +      -       -      +
    235C  LEU*     2.9    33.3    +      -       +      +
    216D  THR*     4.2     6.1    -      -       +      +
    219D  LEU*     3.9    12.3    -      -       +      +
    220D  TYR*     3.8    51.1    -      -       +      +
    223D  LYS*     3.9    26.5    -      -       +      -
   2003D  CDL      4.0    17.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 232 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     33C  ASN*     3.6    19.7    -      -       -      -
     37C  LEU*     4.3     6.7    -      -       -      -
    228C  LYS      3.0     7.9    +      -       -      -
    229C  ASP      2.9     7.2    +      -       -      -
    231C  LEU*     1.3    78.2    -      -       -      +
    233C  LEU*     1.3    60.0    +      -       -      +
    235C  LEU*     3.3     2.4    +      -       -      +
    236C  MET*     3.1    28.6    +      -       -      +
   2003D  CDL      4.0    19.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 233 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     37C  LEU*     3.6    23.9    -      -       +      +
     40C  VAL*     3.7    37.2    -      -       +      -
     90C  PHE*     5.7     3.4    -      -       +      -
    229C  ASP      2.7    16.3    +      -       -      +
    230C  ILE*     3.4    16.8    -      -       +      +
    231C  LEU      3.2     0.2    -      -       -      -
    232C  GLY*     1.3    72.7    -      -       -      +
    234C  THR*     1.3    59.4    +      -       -      +
    236C  MET*     3.3     2.1    +      -       -      +
    237C  LEU*     2.8    49.3    +      -       +      +
   2005E  PEE      4.6    27.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 234 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    230C  ILE      3.1     8.0    +      -       -      +
    231C  LEU*     2.9    22.2    +      -       -      +
    233C  LEU*     1.3    78.1    -      -       +      +
    235C  LEU*     1.3    66.0    +      -       -      +
    237C  LEU*     3.8     9.2    -      -       +      +
    238C  THR*     3.1    27.7    +      -       -      -
    215D  LEU*     5.1     6.5    -      -       +      -
    216D  THR*     3.8    20.6    +      -       -      -
    219D  LEU*     3.3    31.4    -      -       +      +
   2009D  BOG      6.4     3.1    -      -       +      -
   2005E  PEE      4.4    20.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 235 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    231C  LEU*     2.9    35.9    +      -       +      +
    232C  GLY*     3.7     5.6    -      -       -      +
    233C  LEU      3.2     0.2    -      -       -      -
    234C  THR*     1.3    82.9    +      -       -      +
    236C  MET*     1.3    59.7    +      -       +      +
    238C  THR*     4.1     3.7    -      -       -      +
    239C  PRO*     3.1    21.8    -      -       -      +
    216D  THR*     3.5    30.3    -      -       +      +
   2003D  CDL      4.2    62.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with MET 236 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     34C  PHE*     4.8    14.6    -      -       +      -
     37C  LEU*     3.6    23.6    -      -       +      -
     90C  PHE*     3.3    42.9    -      -       +      -
     93C  ILE*     4.4    23.8    -      -       +      -
     94C  CYS*     4.6     6.7    -      -       -      -
     97C  LEU*     5.2     2.7    -      -       +      -
    232C  GLY      3.1    14.7    +      -       -      +
    233C  LEU      4.0     1.3    -      -       -      +
    235C  LEU*     1.3    75.5    -      -       -      +
    237C  LEU*     1.3    68.0    +      -       -      +
    238C  THR      3.1     2.5    -      -       -      -
    239C  PRO*     3.0    21.8    -      -       +      +
    240C  PHE      3.4     7.8    +      -       -      -
   2003D  CDL      5.2    10.3    -      -       +      -
   2004G  CDL      5.5     9.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 237 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     90C  PHE*     4.2     6.5    -      -       +      -
    233C  LEU*     2.8    34.9    +      -       +      +
    234C  THR*     3.8    10.8    -      -       +      +
    236C  MET*     1.3    78.1    -      -       -      +
    238C  THR*     1.3    62.1    +      -       -      +
    240C  PHE*     3.3    28.7    -      -       +      +
    241C  LEU*     3.0    42.0    +      -       +      +
   2009D  BOG      4.7    12.8    -      -       +      -
   2005E  PEE      4.1    29.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 238 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    234C  THR      3.1    15.2    +      -       -      -
    235C  LEU*     4.1     3.3    -      -       -      +
    236C  MET      3.0     1.2    +      -       -      -
    237C  LEU*     1.3    78.8    -      -       -      +
    239C  PRO*     1.3    73.5    -      -       +      +
    241C  LEU*     3.9     3.5    -      -       -      +
    242C  THR*     2.9    36.2    +      -       -      +
    208D  MET*     4.6     2.9    -      -       -      +
    209D  LEU*     4.9     8.5    -      -       +      -
    212D  SER*     2.7    30.7    +      -       -      +
    216D  THR*     4.1     6.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with PRO 239 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    235C  LEU      3.1    17.5    -      -       -      +
    236C  MET*     3.0    25.4    -      -       +      +
    238C  THR*     1.3    86.9    -      -       +      +
    240C  PHE*     1.3    63.1    +      -       -      +
    242C  THR*     3.3     9.0    +      -       +      +
    243C  LEU*     2.9    25.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 240 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     44C  THR*     5.4    12.8    -      -       +      -
     83C  LEU*     3.7    23.3    -      -       +      -
     86C  ASN*     3.6    21.3    -      -       +      -
     87C  GLY*     3.5    36.6    -      -       -      -
     90C  PHE*     4.0    29.4    -      +       +      -
    236C  MET      3.4    10.9    +      -       -      +
    237C  LEU*     3.3    27.4    -      -       +      +
    239C  PRO*     1.3    80.2    -      -       -      +
    241C  LEU*     1.3    77.5    +      -       +      +
    243C  LEU*     3.0     8.2    +      -       +      +
    244C  ALA*     2.8    28.8    +      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 241 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     83C  LEU*     3.9    23.3    -      -       +      -
    237C  LEU*     3.0    29.9    +      -       +      +
    238C  THR*     4.1     0.4    -      -       -      +
    240C  PHE*     1.3    98.8    -      -       +      +
    242C  THR*     1.3    53.3    +      -       -      +
    244C  ALA*     4.4     2.9    -      -       +      +
    245C  LEU*     2.8    45.5    +      -       +      +
    208D  MET*     3.7    36.6    -      -       +      -
   2009D  BOG      4.6    20.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 242 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    238C  THR*     2.9    26.1    +      -       -      +
    239C  PRO*     3.5     8.1    -      -       -      +
    241C  LEU*     1.3    76.0    -      -       -      +
    243C  LEU*     1.3    59.7    +      -       -      +
    246C  PHE*     2.9    44.4    +      -       +      +
    247C  SER      3.9     0.2    +      -       -      -
    208D  MET*     3.5    18.7    -      -       -      +
    209D  LEU*     3.9    13.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 243 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     86C  ASN*     3.5    26.0    -      -       +      +
     89C  SER*     6.0     0.9    -      -       -      -
    239C  PRO      2.9    12.6    +      -       -      +
    240C  PHE*     3.3    11.9    -      -       +      +
    242C  THR*     1.3    74.9    -      -       -      +
    244C  ALA*     1.3    57.7    +      -       -      +
    245C  LEU      3.0     4.7    +      -       -      -
    247C  SER*     2.9    58.8    +      -       -      +
    250C  LEU*     3.8    27.4    -      -       +      -
    251C  LEU*     3.7    23.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 244 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     82C  ASN*     3.6    29.0    -      -       +      +
     83C  LEU*     4.7    12.1    -      -       +      -
     86C  ASN*     3.7    34.8    -      -       +      +
    240C  PHE*     2.8    24.0    +      -       +      +
    241C  LEU*     4.2     6.3    -      -       -      +
    243C  LEU*     1.3    73.3    -      -       -      +
    245C  LEU*     1.3    67.8    +      -       +      +
    248C  PRO*     4.1     7.5    -      -       -      +
    201D  ARG*     4.8     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 245 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     78C  TRP*     4.4     7.0    -      -       +      -
     79C  LEU*     4.3    23.6    -      -       +      -
     83C  LEU*     6.2     0.4    -      -       +      -
    241C  LEU*     2.8    25.6    +      -       +      +
    242C  THR      4.5     0.4    -      -       -      +
    244C  ALA*     1.3    90.8    -      -       +      +
    246C  PHE*     1.3    68.9    +      -       +      +
    248C  PRO*     4.3     0.7    -      -       -      -
    201D  ARG*     2.6    52.2    +      -       +      +
    204D  MET*     4.1    16.6    -      -       +      -
    205D  GLY*     3.7    34.8    -      -       -      +
    208D  MET*     4.2    17.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 246 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    242C  THR*     2.9    38.2    +      -       +      +
    245C  LEU*     1.3    81.3    -      -       -      +
    247C  SER*     1.3    59.3    +      -       -      +
    248C  PRO*     3.3    11.0    -      -       -      +
     17D  PRO*     3.4    50.1    -      -       +      +
     18D  LEU*     4.2    10.3    -      -       +      -
    201D  ARG*     3.6     9.2    +      -       -      +
    202D  LYS*     4.2    11.1    -      -       +      -
    205D  GLY*     3.5    39.5    -      -       -      -
    206D  LEU      4.0     0.9    -      -       -      -
    208D  MET*     4.2     5.6    -      -       +      -
    209D  LEU*     3.6    30.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 247 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     86C  ASN*     5.3     0.2    +      -       -      -
    242C  THR      3.9     0.6    +      -       -      -
    243C  LEU*     2.9    29.6    +      -       -      +
    246C  PHE*     1.3    80.9    -      -       -      +
    248C  PRO*     1.3    64.2    -      -       -      +
    249C  ASN      3.1     3.2    +      -       -      -
    250C  LEU*     3.1    43.1    +      -       -      +
----------------------------------------------------------
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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