Contacts of the helix formed by residues 219 - 247 (chain D) in PDB entry 2QW4


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 SER 219 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    212A  ALA*     5.9     4.4    -      -       -      +
    220D  CYS*     1.3    64.8    +      -       -      +
    221D  LEU*     3.3    19.1    -      -       -      -
    222D  SER*     3.3    35.1    +      -       -      -
    223D  ARG*     3.5    12.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with CYS 220 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    208D  VAL*     5.6    11.2    -      -       +      -
    219D  SER*     1.3    71.4    -      -       -      +
    221D  LEU*     1.3    51.7    +      -       -      +
    223D  ARG*     2.7    39.1    +      -       -      +
    224D  LEU*     2.6    38.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 221 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     61B  LEU*     3.7    24.7    -      -       +      -
     62B  PRO*     5.9     1.8    -      -       +      -
    204D  LEU*     3.6    33.2    -      -       +      -
    205D  LYS*     4.4    15.5    -      -       +      -
    208D  VAL*     3.7    37.6    -      -       +      +
    219D  SER*     3.7    11.4    -      -       -      -
    220D  CYS*     1.3    76.0    -      -       -      +
    222D  SER*     1.3    59.1    +      -       -      +
    224D  LEU*     4.0    12.1    -      -       +      -
    225D  LEU*     2.8    51.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 222 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     62B  PRO*     5.8     4.9    -      -       -      +
    219D  SER*     3.3    30.8    +      -       -      -
    220D  CYS      3.1     0.4    -      -       -      -
    221D  LEU*     1.3    77.9    -      -       -      +
    223D  ARG*     1.3    55.5    +      -       -      +
    225D  LEU*     3.7     2.8    -      -       -      +
    226D  GLY*     2.7    36.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 223 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    212A  ALA      5.8     3.9    +      -       -      -
    165D  LEU*     3.7    44.4    +      -       +      +
    219D  SER      3.8     9.5    +      -       -      +
    220D  CYS*     2.7    42.9    +      -       -      +
    222D  SER*     1.3    76.6    -      -       -      +
    224D  LEU*     1.3    58.3    +      -       -      +
    226D  GLY*     4.1     1.6    -      -       -      -
    227D  LYS*     3.7    20.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 224 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    162D  LEU*     5.0     3.8    -      -       +      -
    165D  LEU*     4.0     9.4    -      -       +      -
    167D  VAL*     3.8    32.5    -      -       +      -
    171D  ALA*     4.3    23.1    -      -       +      +
    175D  LEU*     3.7    38.1    -      -       +      +
    204D  LEU*     4.8     5.8    -      -       +      -
    208D  VAL*     5.1     4.3    -      -       +      -
    220D  CYS*     2.6    19.9    +      -       +      +
    221D  LEU*     3.9    22.9    -      -       +      +
    223D  ARG*     1.3    73.0    -      -       -      +
    225D  LEU*     1.3    65.3    +      -       +      +
    226D  GLY      3.5     0.2    +      -       -      -
    227D  LYS*     3.5    15.5    +      -       +      +
    228D  LEU*     4.4     1.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 225 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     61B  LEU*     3.8    35.7    -      -       +      -
     62B  PRO*     4.1    25.1    -      -       +      +
     64B  PHE*     3.6    27.1    -      -       +      -
    175D  LEU*     4.4    18.4    -      -       +      -
    178D  LEU*     4.7     5.6    -      -       +      -
    204D  LEU*     4.5     9.6    -      -       +      -
    221D  LEU*     2.8    38.6    +      -       +      +
    222D  SER*     4.1     2.7    -      -       -      +
    224D  LEU*     1.3    69.1    -      -       +      +
    226D  GLY*     1.3    54.8    +      -       -      +
    227D  LYS      3.0     2.7    -      -       -      -
    228D  LEU*     2.8    41.6    +      -       +      +
    229D  PRO*     3.6     3.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 226 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     64B  PHE*     4.2    12.1    -      -       -      +
    222D  SER      2.7    22.5    +      -       -      -
    223D  ARG*     4.1     4.3    -      -       -      -
    224D  LEU      3.3     0.4    -      -       -      -
    225D  LEU*     1.3    71.5    -      -       -      +
    227D  LYS*     1.3    57.8    +      -       -      +
    228D  LEU      3.2     0.2    -      -       -      -
    229D  PRO*     3.0    18.2    -      -       -      +
    230D  GLU*     4.4     4.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 227 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    118D  LEU*     6.5     0.2    -      -       +      -
    158D  PHE*     3.7    23.3    -      -       +      -
    161D  SER*     2.4    44.6    +      -       -      -
    162D  LEU*     4.1    13.9    -      -       +      +
    165D  LEU*     3.8    31.3    -      -       +      +
    175D  LEU*     5.9     3.1    -      -       +      -
    223D  ARG*     3.7    15.0    +      -       -      +
    224D  LEU*     3.5    11.4    +      -       +      +
    225D  LEU      3.0     0.8    +      -       -      -
    226D  GLY*     1.3    78.2    -      -       -      +
    228D  LEU*     1.3    56.3    +      -       +      +
    230D  GLU*     3.0    38.5    +      -       +      +
    231D  LEU*     3.1    11.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 228 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     64B  PHE*     3.7    30.7    -      -       +      -
    114D  GLU*     5.7     3.1    -      -       -      +
    118D  LEU*     5.3     0.9    -      -       +      -
    175D  LEU*     4.0    27.8    -      -       +      -
    178D  LEU*     5.5     8.1    -      -       +      -
    179D  VAL*     3.5    32.8    -      -       +      +
    225D  LEU*     2.8    23.3    +      -       +      +
    227D  LYS*     1.3    77.2    -      -       +      +
    229D  PRO*     1.3    59.3    -      -       +      +
    231D  LEU*     3.3    20.1    -      -       +      +
    232D  ARG*     3.1    25.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with PRO 229 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     64B  PHE*     3.5    30.3    -      -       +      +
     65B  GLY*     3.8    19.5    -      -       -      +
    225D  LEU      3.6     5.4    -      -       -      +
    226D  GLY      3.0    27.4    -      -       -      +
    228D  LEU*     1.3    82.7    -      -       +      +
    230D  GLU*     1.3    62.8    +      -       -      +
    232D  ARG*     3.2    11.3    -      -       +      +
    233D  THR*     3.0    23.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 230 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    154D  SER      5.1     1.4    -      -       -      +
    157D  ALA*     5.1     2.3    -      -       -      +
    158D  PHE*     3.6    34.0    +      -       +      +
    161D  SER*     4.3     8.8    +      -       -      -
    226D  GLY      4.4     2.6    +      -       -      +
    227D  LYS*     3.0    28.1    +      -       -      +
    229D  PRO*     1.3    74.9    -      -       -      +
    231D  LEU*     1.3    65.0    +      -       -      +
    233D  THR*     3.1    13.5    +      -       -      +
    234D  LEU*     3.0    31.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 231 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    114D  GLU*     3.8    25.6    -      -       +      +
    117D  ILE*     3.4    40.6    -      -       +      -
    118D  LEU*     3.8    33.2    -      -       +      +
    158D  PHE*     3.6    21.1    -      -       +      -
    179D  VAL*     4.5     1.8    -      -       +      -
    227D  LYS      3.1     9.9    +      -       -      +
    228D  LEU*     3.3    31.6    -      -       +      +
    230D  GLU*     1.3    75.4    -      -       -      +
    232D  ARG*     1.3    62.6    +      -       -      +
    234D  LEU*     2.9    22.1    +      -       -      +
    235D  CYS*     3.3    10.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 232 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    114D  GLU*     3.1    42.5    +      -       -      +
    182D  THR*     5.2     5.3    +      -       -      +
    184D  ARG*     3.6    24.4    -      -       -      +
    228D  LEU      3.1    11.3    +      -       -      +
    229D  PRO*     3.2    17.0    -      -       +      +
    231D  LEU*     1.3    80.2    -      -       -      +
    233D  THR*     1.3    57.1    +      -       -      -
    235D  CYS*     3.6    20.3    +      -       -      +
    236D  THR*     4.0     7.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with THR 233 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    229D  PRO      3.0    15.1    +      -       -      -
    230D  GLU*     3.1    12.6    +      -       -      -
    232D  ARG*     1.3    72.7    -      -       -      +
    234D  LEU*     1.3    66.5    +      -       -      +
    235D  CYS      3.2     0.2    -      -       -      -
    236D  THR*     3.4    19.9    +      -       +      +
    237D  GLN*     3.8    11.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 234 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    117D  ILE*     3.9    26.7    -      -       +      -
    151D  TRP*     3.1    22.2    +      -       -      +
    154D  SER*     3.5    39.0    -      -       -      +
    155D  ILE*     4.1     8.1    -      -       +      +
    158D  PHE*     3.5    37.9    -      -       +      -
    230D  GLU*     3.0    32.0    +      -       +      +
    231D  LEU*     2.9    11.4    +      -       -      +
    233D  THR*     1.3    76.5    -      -       -      +
    235D  CYS*     1.3    63.5    +      -       -      +
    236D  THR      3.2     0.7    +      -       -      -
    237D  GLN*     3.2    14.4    +      -       -      +
    238D  GLY      3.2     4.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with CYS 235 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    113D  LEU*     4.2    16.5    -      -       +      +
    114D  GLU*     3.5    36.6    -      -       -      -
    117D  ILE*     3.6    21.5    -      -       +      -
    231D  LEU      3.3    17.5    -      -       -      -
    232D  ARG*     3.7    13.2    -      -       -      +
    233D  THR      3.2     0.8    -      -       -      -
    234D  LEU*     1.3    75.0    -      -       -      +
    236D  THR*     1.3    58.5    +      -       -      +
    238D  GLY*     3.0     4.2    +      -       -      +
    239D  LEU*     2.9    34.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 236 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    232D  ARG      4.0     7.1    +      -       -      -
    233D  THR*     3.4    15.1    +      -       +      -
    234D  LEU      3.1     0.4    -      -       -      -
    235D  CYS*     1.3    74.5    -      -       -      +
    237D  GLN*     1.3    66.5    +      -       -      +
    238D  GLY      3.0     1.1    -      -       -      -
    239D  LEU*     3.0    19.0    +      -       +      +
    240D  GLN*     2.9    40.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 237 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    150D  ASP*     4.4     3.5    -      -       -      +
    151D  TRP*     3.3    35.1    +      -       +      +
    154D  SER*     2.6    40.4    +      -       -      -
    233D  THR*     3.8    11.1    +      -       +      +
    234D  LEU*     3.4    13.8    -      -       -      +
    236D  THR*     1.3    77.7    -      -       -      +
    238D  GLY*     1.3    63.7    +      -       -      +
    240D  GLN*     3.2    16.0    +      -       -      +
    241D  ARG*     2.9    21.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 238 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    113D  LEU*     5.1     2.0    -      -       -      -
    151D  TRP*     3.4    35.5    -      -       -      -
    234D  LEU      3.2     3.6    +      -       -      -
    235D  CYS      3.0     8.6    +      -       -      -
    236D  THR      3.0     1.0    -      -       -      -
    237D  GLN*     1.3    77.7    -      -       -      +
    239D  LEU*     1.3    52.8    +      -       -      +
    241D  ARG*     2.7    24.4    +      -       -      +
    242D  ILE*     2.9    21.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 239 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    113D  LEU*     4.2    18.3    -      -       +      +
    235D  CYS*     2.9    23.0    +      -       +      +
    236D  THR*     3.0    20.8    +      -       +      +
    238D  GLY*     1.3    69.6    -      -       -      +
    240D  GLN*     1.3    58.6    +      -       +      +
    242D  ILE*     3.1    10.0    +      -       +      +
    243D  PHE*     2.8    31.4    +      -       -      +
    260D  ILE      5.1     1.8    -      -       -      +
    261D  PHE*     3.9    29.2    -      -       +      +
    264D  THR*     3.6    33.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 240 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    236D  THR*     2.9    39.5    +      -       +      +
    237D  GLN*     3.3    17.4    -      -       -      +
    239D  LEU*     1.3    72.4    -      -       +      +
    241D  ARG*     1.3    57.0    +      -       -      +
    243D  PHE*     3.9     7.7    -      -       -      +
    244D  TYR*     3.4    23.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 241 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     67D  GLU*     3.8    16.2    +      -       -      +
     75D  PHE*     4.5     7.9    -      -       +      -
    145D  ALA      4.4     0.6    +      -       -      -
    146D  ARG      3.3    19.2    +      -       -      -
    147D  GLY      3.0    26.9    +      -       -      +
    148D  PHE*     3.0    27.8    +      -       -      +
    149D  GLY*     3.7    15.0    -      -       -      +
    151D  TRP*     4.2    15.5    -      -       +      -
    237D  GLN      2.9     9.8    +      -       -      +
    238D  GLY      2.7    17.2    +      -       -      +
    240D  GLN*     1.3    71.5    -      -       -      +
    242D  ILE*     1.3    64.9    +      -       -      +
    243D  PHE      3.3     0.2    -      -       -      -
    244D  TYR*     3.6    27.8    +      -       -      +
    245D  LEU*     3.1    40.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 242 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     75D  PHE*     4.3    22.4    -      -       +      -
     76D  TYR*     4.7    12.6    -      -       +      +
     79D  LEU*     5.9     3.8    -      -       +      -
    113D  LEU*     4.5    20.2    -      -       +      -
    151D  TRP*     5.4     1.3    -      -       +      -
    238D  GLY*     2.9    34.0    +      -       -      +
    239D  LEU*     3.1     8.0    +      -       +      +
    241D  ARG*     1.3    76.6    -      -       -      +
    243D  PHE*     1.3    63.2    +      -       -      +
    245D  LEU*     3.1     9.0    +      -       -      +
    246D  LYS*     3.0    35.4    +      -       +      +
    253D  PRO*     5.6     2.5    -      -       +      -
    257D  ILE*     5.0    17.9    -      -       +      -
    258D  ASP*     5.8     0.4    -      -       -      +
    261D  PHE*     3.7    32.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 243 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    239D  LEU      2.8    20.7    +      -       -      +
    240D  GLN*     4.0     7.6    -      -       -      +
    242D  ILE*     1.3    72.4    -      -       -      +
    244D  TYR*     1.3    66.1    +      -       +      +
    246D  LYS*     3.0    24.3    +      -       +      +
    247D  LEU*     3.0    47.0    +      -       +      +
    261D  PHE*     3.9    26.2    -      +       +      -
----------------------------------------------------------
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Residues in contact with TYR 244 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     66D  LYS*     4.2     7.1    -      -       -      +
     67D  GLU*     2.9    24.9    +      -       -      -
    240D  GLN      3.4    16.9    +      -       -      +
    241D  ARG*     3.6    37.5    -      -       -      +
    243D  PHE*     1.3    79.5    -      -       +      +
    245D  LEU*     1.3    76.9    +      -       +      +
    247D  LEU*     3.2    24.3    +      -       +      +
    248D  GLU*     3.2    45.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 245 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     67D  GLU*     4.8     5.4    -      -       +      +
     72D  VAL*     4.4    30.1    -      -       +      +
     75D  PHE*     3.6    36.8    -      -       +      -
     76D  TYR*     3.5    21.3    -      -       +      +
    147D  GLY      4.3     9.4    -      -       -      +
    241D  ARG*     3.1    36.5    +      -       -      +
    242D  ILE*     3.1     7.1    +      -       -      +
    244D  TYR*     1.3    95.6    -      -       +      +
    246D  LYS*     1.3    57.6    +      -       -      +
    248D  GLU*     2.9    24.2    +      -       +      +
    249D  ASP*     3.2    10.9    +      -       -      -
    250D  LEU*     4.8     1.1    +      -       +      +
    251D  VAL      5.7     0.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 246 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     76D  TYR*     4.2     8.7    +      -       -      +
    242D  ILE*     3.0    32.2    +      -       +      +
    243D  PHE*     3.4    13.4    -      -       +      +
    245D  LEU*     1.3    75.5    -      -       -      +
    247D  LEU*     1.3    61.3    +      -       -      +
    249D  ASP*     3.3    16.0    +      -       -      +
    253D  PRO*     4.6    17.0    -      -       +      -
    258D  ASP*     3.7    23.1    -      -       -      +
    261D  PHE*     3.8    32.8    -      -       +      -
    262D  MET*     5.1     5.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 247 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    243D  PHE*     3.0    50.6    +      -       +      +
    244D  TYR*     3.3    19.3    -      -       +      +
    245D  LEU      3.1     0.4    -      -       -      -
    246D  LYS*     1.3    76.9    -      -       +      +
    248D  GLU*     1.3    68.0    +      -       -      +
    249D  ASP*     3.5     0.6    -      -       -      +
----------------------------------------------------------
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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