Contacts of the helix formed by residues 146 - 172 (chain D) in PDB entry 4PP8


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 ASP 146 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     71D  LYS*     2.7    23.0    +      -       -      -
     75D  LYS*     2.5    36.3    +      -       -      +
    142D  LYS      4.1     2.2    +      -       -      +
    143D  TRP      3.1    14.5    +      -       -      +
    144D  LYS      3.1     3.2    -      -       -      -
    145D  ASP*     1.3    75.4    -      -       -      +
    147D  GLY*     1.3    62.6    +      -       -      +
    148D  GLU*     3.2    16.6    +      -       -      +
    149D  PHE*     3.1    24.1    +      -       -      +
    150D  VAL*     3.2    15.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 147 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    144D  LYS      5.1     1.3    -      -       -      -
    145D  ASP      3.2     8.4    +      -       -      -
    146D  ASP*     1.3    73.3    +      -       -      +
    148D  GLU*     1.3    61.7    +      -       -      +
    150D  VAL*     3.4     6.8    +      -       -      +
    151D  LYS*     3.0    29.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 148 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     71D  LYS*     4.2    14.6    -      -       -      +
    146D  ASP*     3.2    11.2    +      -       -      +
    147D  GLY*     1.3    76.3    +      -       -      +
    149D  PHE*     1.3    61.5    +      -       -      +
    151D  LYS*     3.3     7.0    +      -       -      +
    152D  GLN*     2.9    38.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 149 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     68D  LEU*     4.5     4.7    -      -       +      -
     71D  LYS*     4.1    25.0    -      -       +      +
     72D  LEU*     3.6    23.8    -      -       +      -
     75D  LYS*     3.8     8.1    -      -       +      -
    112D  PHE*     3.7    27.6    -      +       -      -
    129D  TRP*     4.1    19.1    -      +       -      -
    143D  TRP*     3.4    46.0    -      +       +      -
    146D  ASP*     3.1    26.0    +      -       -      +
    148D  GLU*     1.3    79.0    -      -       -      +
    150D  VAL*     1.3    67.4    +      -       +      +
    152D  GLN*     3.2    16.0    +      -       -      +
    153D  LEU*     3.2    33.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 150 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    122D  PHE*     3.8    17.6    -      -       +      -
    127D  MET*     3.6    29.6    -      -       +      -
    129D  TRP*     4.0    13.9    -      -       +      +
    144D  LYS*     3.6    31.4    -      -       +      +
    146D  ASP      3.2    13.3    +      -       -      +
    147D  GLY*     3.9     7.6    -      -       -      +
    149D  PHE*     1.3    80.1    -      -       +      +
    151D  LYS*     1.3    63.7    +      -       -      +
    153D  LEU*     3.2    10.4    +      -       -      +
    154D  LYS*     3.2    20.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 151 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    127D  MET*     6.3     0.4    -      -       -      -
    147D  GLY      3.0    18.1    +      -       -      +
    148D  GLU*     3.5     7.6    -      -       -      +
    149D  PHE      3.3     0.2    -      -       -      -
    150D  VAL*     1.3    76.1    -      -       -      +
    152D  GLN*     1.3    53.0    +      -       +      +
    154D  LYS*     3.2     6.3    +      -       -      +
    155D  PHE*     2.7    42.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 152 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     64D  PRO      4.7     1.0    -      -       -      +
     67D  ASN*     3.6    11.8    +      -       -      +
     68D  LEU*     3.5    40.1    +      -       +      +
     71D  LYS*     3.5    43.3    -      -       -      +
    110D  TRP*     5.0     0.2    -      -       -      -
    148D  GLU*     2.9    19.9    +      -       +      +
    149D  PHE*     3.2     8.0    +      -       -      +
    151D  LYS*     1.3    73.5    -      -       +      +
    153D  LEU*     1.3    62.9    +      -       -      +
    155D  PHE*     4.4     8.5    -      -       +      -
    156D  LEU*     3.1    28.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 153 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     68D  LEU*     4.0    25.4    -      -       +      -
    110D  TRP*     3.1    59.9    +      -       +      +
    112D  PHE*     3.8    16.6    -      -       +      -
    122D  PHE*     3.7    25.6    -      -       +      -
    124D  THR*     4.4     1.1    -      -       -      -
    129D  TRP*     4.4     3.6    -      -       +      -
    149D  PHE*     3.4    42.0    -      -       +      +
    150D  VAL*     3.2     9.5    +      -       -      +
    152D  GLN*     1.3    79.7    -      -       -      +
    154D  LYS*     1.3    60.7    +      -       -      +
    157D  ILE*     3.5    12.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 154 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    122D  PHE*     4.5     2.0    -      -       +      -
    124D  THR*     4.2    16.5    -      -       -      +
    127D  MET*     4.3    23.1    -      -       +      -
    150D  VAL      3.2    10.8    +      -       -      +
    151D  LYS*     3.8     7.6    -      -       -      +
    153D  LEU*     1.3    77.9    -      -       -      +
    155D  PHE*     1.3    64.7    +      -       -      +
    157D  ILE*     3.2    15.9    +      -       -      +
    158D  HIS*     3.4    30.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 155 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     64D  PRO*     6.1     1.8    -      -       +      -
    151D  LYS*     2.7    26.8    +      -       +      +
    152D  GLN*     4.2     6.7    -      -       +      +
    154D  LYS*     1.3    72.0    -      -       -      +
    156D  LEU*     1.3    66.9    +      -       -      +
    158D  HIS*     3.2    17.1    +      -       +      -
    159D  GLU*     2.8    59.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 156 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     61D  LEU*     4.1    22.7    -      -       +      +
     64D  PRO*     3.6    37.5    -      -       +      +
     65D  LEU*     3.8    24.9    -      -       +      -
     68D  LEU*     4.8     5.2    -      -       +      -
     96D  MET*     4.2     9.6    -      -       +      -
    110D  TRP*     4.2    18.4    -      -       +      -
    152D  GLN      3.1    19.9    +      -       -      +
    153D  LEU      4.2     4.0    -      -       -      +
    154D  LYS      3.4     0.2    -      -       -      -
    155D  PHE*     1.3    79.0    -      -       -      +
    157D  ILE*     1.3    78.2    +      -       +      +
    159D  GLU*     3.5     7.4    +      -       -      +
    160D  CYS*     3.2    24.1    +      -       -      +
    164D  MET*     5.4     0.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 157 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     96D  MET*     3.9    22.9    -      -       +      -
     98D  TYR*     3.8    25.4    -      -       +      -
    106D  PRO*     4.1    22.7    -      -       +      +
    107D  SER*     4.3     4.3    -      -       -      +
    108D  ALA*     3.3    28.3    -      -       +      -
    110D  TRP*     4.4     1.1    -      -       -      +
    124D  THR*     4.2     9.4    -      -       +      +
    153D  LEU      3.5    17.3    -      -       -      +
    154D  LYS      3.4     7.4    -      -       -      +
    155D  PHE      3.1     0.8    -      -       -      -
    156D  LEU*     1.3    87.2    -      -       +      +
    158D  HIS*     1.3    56.9    +      -       +      +
    161D  SER*     2.7    38.8    +      -       -      -
    164D  MET*     4.2     9.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with HIS 158 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    106D  PRO*     5.0    16.3    +      -       +      -
    124D  THR*     6.0     2.6    -      -       -      -
    154D  LYS*     3.5    32.3    +      -       +      +
    155D  PHE*     3.2    18.3    +      -       +      +
    157D  ILE*     1.3    83.7    -      -       +      +
    159D  GLU*     1.3    63.0    +      -       -      +
    160D  CYS      3.4     0.3    +      -       -      -
    161D  SER*     3.8    12.4    +      -       -      -
    162D  GLN      5.1     1.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 159 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     60D  CYS*     3.4    16.8    -      -       -      +
     64D  PRO*     4.2    24.5    -      -       -      +
    155D  PHE*     2.8    55.3    +      -       +      +
    156D  LEU*     3.8     5.5    -      -       -      +
    158D  HIS*     1.3    79.3    -      -       -      +
    160D  CYS*     1.3    59.9    +      -       -      +
    162D  GLN*     5.4     1.3    +      -       -      +
    163D  LYS*     5.5     2.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with CYS 160 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     60D  CYS*     2.0    65.1    -      -       +      -
     61D  LEU*     3.9    21.8    -      -       +      -
     64D  PRO*     5.0     4.3    -      -       -      -
    156D  LEU*     3.2    17.2    +      -       -      +
    157D  ILE      3.6     0.4    -      -       -      -
    159D  GLU*     1.3    80.7    -      -       -      +
    161D  SER*     1.3    60.0    +      -       -      +
    162D  GLN      3.3     2.7    -      -       -      -
    163D  LYS*     3.2     5.5    +      -       +      +
    164D  MET*     2.8    38.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 161 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98D  TYR*     3.4     9.0    +      -       -      -
    106D  PRO*     3.5    36.3    -      -       -      -
    157D  ILE      2.7    22.5    +      -       -      -
    158D  HIS      3.8     7.8    +      -       -      -
    159D  GLU      3.7     1.2    -      -       -      -
    160D  CYS*     1.3    72.6    -      -       -      +
    162D  GLN*     1.3    53.5    +      -       -      +
    164D  MET*     3.3     6.4    +      -       -      +
    165D  ASP*     2.8    42.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 162 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    189A  SER*     6.1     2.7    -      -       -      +
    158D  HIS      5.1     1.2    +      -       -      -
    159D  GLU      5.4     1.1    +      -       -      +
    160D  CYS      3.3     0.6    -      -       -      -
    161D  SER*     1.3    78.3    -      -       -      +
    163D  LYS*     1.3    63.3    +      -       +      +
    165D  ASP*     3.3     8.7    +      -       -      +
    166D  GLU*     2.8    30.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 163 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     56D  GLU*     2.9    61.9    +      -       +      +
     57D  VAL*     4.0    13.9    -      -       +      +
     59D  LYS*     4.6     4.8    -      -       -      +
     60D  CYS*     3.5    28.7    -      -       +      +
    159D  GLU      5.5     1.8    -      -       -      +
    160D  CYS*     3.2     8.9    +      -       -      +
    162D  GLN*     1.3    78.6    -      -       +      +
    164D  MET*     1.3    60.1    +      -       -      +
    166D  GLU*     3.6     8.0    -      -       -      +
    167D  PHE*     3.0    28.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 164 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      5D  LEU*     4.0    30.4    -      -       +      +
     57D  VAL*     3.7    22.4    -      -       +      -
     61D  LEU*     4.3    15.0    -      -       +      -
     96D  MET*     4.4     3.6    -      -       +      -
     98D  TYR*     3.6    50.9    -      -       +      -
    156D  LEU*     4.9     0.9    -      -       +      +
    157D  ILE*     4.2    17.7    -      -       +      +
    160D  CYS*     2.8    34.5    +      -       +      +
    161D  SER*     3.6     2.9    -      -       -      +
    163D  LYS*     1.3    74.5    -      -       -      +
    165D  ASP*     1.3    59.0    +      -       -      +
    167D  PHE*     3.3     3.3    +      -       -      +
    168D  LEU*     2.9    36.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 165 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98D  TYR*     2.6    26.9    +      -       -      -
    100D  GLN*     3.8    13.1    +      -       +      +
    101D  SER*     3.1    36.9    +      -       -      -
    102D  GLN      5.0     0.6    +      -       -      -
    161D  SER*     2.8    24.4    +      -       -      +
    162D  GLN*     3.5     8.6    -      -       -      +
    164D  MET*     1.3    72.1    -      -       -      +
    166D  GLU*     1.3    63.8    +      -       -      +
    168D  LEU*     3.2     8.0    +      -       -      +
    169D  LYS*     2.9    24.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 166 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    189A  SER*     4.9    12.3    -      -       -      +
    190A  LEU      6.1     0.7    -      -       -      +
    191A  SER*     4.7    13.6    +      -       -      +
    193A  ASN*     5.8     0.6    +      -       -      -
     56D  GLU*     4.2    14.6    -      -       -      +
    162D  GLN      2.8    20.5    +      -       -      +
    163D  LYS*     3.6    10.1    -      -       -      +
    165D  ASP*     1.3    71.8    -      -       -      +
    167D  PHE*     1.3    60.8    +      -       -      +
    169D  LYS*     3.2    21.2    -      -       -      +
    170D  GLN*     3.3     7.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 167 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    193A  ASN*     4.5     6.5    -      -       -      +
      5D  LEU*     4.8     6.5    -      -       +      -
     28D  VAL*     3.8    18.6    -      -       +      -
     31D  ILE*     6.0     1.8    -      -       +      -
     33D  ILE*     3.5    42.8    -      -       +      -
     54D  ALA*     3.8    33.7    -      -       +      -
     56D  GLU*     6.1     2.0    -      -       +      +
     57D  VAL*     4.3    16.8    -      -       +      -
    163D  LYS      3.0    17.7    +      -       -      +
    164D  MET*     3.7     4.7    -      -       -      +
    165D  ASP      3.2     0.4    -      -       -      -
    166D  GLU*     1.3    72.9    -      -       -      +
    168D  LEU*     1.3    67.0    +      -       +      +
    170D  GLN*     3.0    54.5    +      -       -      +
    171D  SER*     3.3    16.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 168 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      3D  HIS      4.2     8.5    -      -       -      +
      4D  SER      4.1     3.1    -      -       -      -
      5D  LEU*     4.0    21.5    -      -       +      +
     28D  VAL*     3.9    32.1    -      -       +      -
     98D  TYR*     4.0    24.5    -      -       +      +
     99D  PRO*     4.9     0.2    -      -       +      -
    100D  GLN*     3.7    46.9    -      -       +      +
    164D  MET      2.9    21.6    +      -       -      +
    165D  ASP      3.6     4.3    -      -       -      +
    167D  PHE*     1.3    76.8    -      -       +      +
    169D  LYS*     1.3    56.6    +      -       -      +
    171D  SER*     3.5     7.6    +      -       -      -
    172D  LYS*     3.0    24.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 169 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    100D  GLN*     4.2    15.2    +      -       -      +
    165D  ASP      2.9    12.3    +      -       -      +
    166D  GLU*     3.2    15.3    -      -       -      +
    167D  PHE      3.1     0.2    -      -       -      -
    168D  LEU*     1.3    74.3    -      -       -      +
    170D  GLN*     1.3    67.6    +      -       -      +
    172D  LYS*     3.1    19.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 170 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    193A  ASN*     2.6    43.2    +      -       +      +
     54D  ALA      5.1     1.6    +      -       -      +
    166D  GLU      3.3     5.5    +      -       -      +
    167D  PHE*     3.0    39.8    +      -       -      +
    169D  LYS*     1.3    80.5    -      -       -      +
    171D  SER*     1.3    67.1    +      -       -      +
    172D  LYS*     3.9     3.8    -      -       -      +
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Residues in contact with SER 171 (chain D). Click here for Legend to table.
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                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
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     28D  VAL*     3.8    25.9    -      -       -      +
     31D  ILE*     5.8     6.5    -      -       -      +
    167D  PHE*     3.3    21.4    +      -       -      -
    168D  LEU*     3.6    10.2    +      -       -      -
    169D  LYS      3.3     0.2    -      -       -      -
    170D  GLN*     1.3    80.7    +      -       -      +
    172D  LYS*     1.3    70.0    -      -       -      +
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Residues in contact with LYS 172 (chain D). Click here for Legend to table.
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                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
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    168D  LEU      3.0    15.0    +      -       -      -
    169D  LYS*     3.1    16.5    +      -       -      +
    170D  GLN      3.9     3.6    -      -       -      +
    171D  SER*     1.3    83.5    -      -       -      +
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


   I  Hydrophilic      - N and O that can donate and accept hydrogen bonds
                         (e.g., oxygen of hydroxyl group of Ser. or Thr)
  II  Acceptor         - N or O that can only accept a hydrogen bond
 III  Donor            - N that can only donate a hydrogen bond
  IV  Hydrophobic      - Cl, Br, I and all C atoms that are not in
                         aromatic rings and do not have a covalent bond to
                         a N or O atom
   V  Aromatic         - C in aromatic rings irrespective of any other 
                         bonds formed by the atom
  VI  Neutral          - C atoms that have a covalent bond to at least one
                         atom of class I or two or more atoms from class II
                         or III; atoms; S, F, P, and metal atoms in all cases
 VII  Neutral-donor    - C atoms that have a covalent bond with only one
                         atom of class III
VIII  Neutral-acceptor - C atoms that have a covalent bond with only 
                         one atom of class II
For each pair of contacts the state of legitimacy is shown below:

Legend:
+, legitimate
-, illegitimate
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  Atomic class           I  II  III   IV   V   VI  VII  VIII
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   I  (Hydrophilic)      +   +    +    -   +   +    +    +
  II  (Acceptor)         +   -    +    -   +   +    +    -
 III  (Donor)            +   +    -    -   +   +    -    +
  IV  (Hydrophobic)      -   -    -    +   +   +    +    +
   V  (Aromatic)         +   +    +    +   +   +    +    +
  VI  (Neutral)          +   +    +    +   +   +    +    +
 VII  (Neutral-donor)    +   +    -    +   +   +    -    +
VIII  (Neutral-acceptor) +   -    +    +   +   +    +    -
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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