Contacts of the helix formed by residues 148 - 177 (chain D) in PDB entry 3RT0


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 THR 148 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    143D  VAL*     3.9     2.9    -      -       -      -
    146D  GLY      5.6     0.4    -      -       -      +
    147D  ASN*     1.3    79.7    -      -       -      +
    149D  LYS*     1.3    66.2    +      -       -      +
    150D  GLU*     3.8     8.5    +      -       -      +
    151D  GLU*     2.9    48.2    +      -       -      +
    152D  THR*     2.9    13.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 149 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     26D  GLN      5.7     0.4    -      -       -      +
     27D  CYS*     3.3    22.0    -      -       +      +
     28D  SER      5.3     3.8    -      -       -      +
    143D  VAL*     3.8    25.5    -      -       +      +
    148D  THR*     1.3    71.1    -      -       -      +
    150D  GLU*     1.3    65.8    +      -       +      +
    152D  THR*     3.3     2.2    +      -       -      -
    153D  CYS*     2.9    45.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 150 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    148D  THR*     3.1     7.9    -      -       -      +
    149D  LYS*     1.3    89.8    -      -       +      +
    151D  GLU*     1.3    63.4    +      -       +      +
    153D  CYS*     3.6     4.8    +      -       -      +
    154D  PHE*     3.1    43.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 151 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    383B  ILE*     4.1    22.7    -      -       +      +
    384B  GLN*     5.2     7.8    +      -       -      +
    385B  TRP*     4.7     1.8    -      -       +      -
    146D  GLY      4.5     1.2    -      -       -      +
    147D  ASN*     2.7    38.3    +      -       +      +
    148D  THR*     2.9    41.8    +      -       -      +
    150D  GLU*     1.3    78.7    -      -       +      +
    152D  THR*     1.3    57.0    +      -       -      +
    154D  PHE*     3.2     9.1    +      -       -      +
    155D  PHE*     2.9    30.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 152 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    385B  TRP*     3.9    25.2    -      -       +      -
     27D  CYS*     3.7    21.5    -      -       -      -
    113D  LEU*     4.9     2.2    -      -       +      -
    141D  VAL*     4.0    16.6    -      -       +      -
    142D  ASP      4.6     0.9    -      -       -      +
    143D  VAL*     3.5     7.0    -      -       -      +
    144D  PRO*     3.5    26.3    -      -       +      +
    147D  ASN*     4.1     1.4    -      -       -      +
    148D  THR      2.9    12.8    +      -       -      -
    149D  LYS*     3.7     7.4    -      -       -      -
    151D  GLU*     1.3    73.5    -      -       -      +
    153D  CYS*     1.3    64.9    +      -       -      +
    155D  PHE*     3.1     1.4    +      -       -      +
    156D  VAL*     2.9    33.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with CYS 153 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     27D  CYS*     3.7    25.1    -      -       -      -
     28D  SER      3.9    21.8    -      -       -      -
     29D  SER*     4.3     3.6    -      -       -      -
    139D  PHE*     4.3     7.6    -      -       -      -
    149D  LYS*     2.9    32.6    +      -       -      +
    150D  GLU*     4.0     4.7    -      -       -      +
    152D  THR*     1.3    75.7    -      -       -      +
    154D  PHE*     1.3    55.0    +      -       -      +
    157D  GLU*     2.7    55.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 154 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    381B  LYS*     3.8    46.7    -      -       +      -
    383B  ILE*     3.8    15.4    -      -       +      +
    391B  PHE*     5.1    11.4    -      +       -      -
    150D  GLU*     3.1    36.3    +      -       +      +
    151D  GLU*     3.2    11.4    +      -       -      +
    153D  CYS*     1.3    79.1    -      -       -      +
    155D  PHE*     1.3    56.9    +      -       -      +
    157D  GLU*     3.8    14.7    +      -       +      +
    158D  ALA*     3.0    30.7    +      -       +      +
----------------------------------------------------------
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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
----------------------------------------------------------
    383B  ILE*     4.0     8.7    -      -       +      +
    385B  TRP*     3.6    61.7    -      +       +      -
    391B  PHE      4.4     2.0    -      -       -      +
    392B  GLY*     3.1    40.6    -      -       -      -
     84D  PRO*     3.9    11.9    -      -       +      -
    113D  LEU*     4.2    15.7    -      -       +      -
    151D  GLU      2.9    15.6    +      -       -      +
    152D  THR      3.1     3.8    +      -       -      +
    154D  PHE*     1.3    72.7    -      -       -      +
    156D  VAL*     1.3    75.8    +      -       +      +
    158D  ALA*     3.3     7.1    +      -       -      +
    159D  LEU*     3.1    51.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 156 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    113D  LEU*     4.2    27.1    -      -       +      -
    116D  TYR*     3.8    16.6    -      -       +      +
    139D  PHE*     3.4    49.6    -      -       +      -
    141D  VAL*     4.6     1.6    -      -       +      -
    152D  THR*     2.9    27.1    +      -       +      +
    155D  PHE*     1.3    74.3    -      -       +      +
    157D  GLU*     1.3    62.5    +      -       -      +
    159D  LEU*     2.9     9.4    +      -       +      +
    160D  ILE*     2.8    38.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 157 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29D  SER*     2.6    37.5    +      -       -      +
     31D  LEU*     3.4    27.5    -      -       +      +
    139D  PHE*     4.5     0.7    -      -       +      -
    153D  CYS*     2.7    40.5    +      -       -      +
    154D  PHE*     3.8    16.2    -      -       +      +
    156D  VAL*     1.3    72.9    -      -       -      +
    158D  ALA*     1.3    57.7    +      -       -      +
    160D  ILE      3.3     0.2    +      -       -      -
    161D  GLN*     2.8    33.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 158 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    391B  PHE*     4.0    35.4    -      -       +      +
    393B  VAL*     5.5     2.2    -      -       +      -
    154D  PHE*     3.0    20.7    +      -       +      +
    155D  PHE      3.4     5.4    -      -       -      +
    156D  VAL      3.1     0.2    -      -       -      -
    157D  GLU*     1.3    76.2    -      -       -      +
    159D  LEU*     1.3    59.7    +      -       +      +
    161D  GLN*     3.5     4.9    +      -       -      +
    162D  SER*     2.6    34.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 159 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    391B  PHE      5.8     0.4    -      -       -      +
    393B  VAL*     4.1    19.7    -      -       +      -
     58D  PHE*     3.9    31.5    -      -       +      -
     83D  LEU*     6.0     3.1    -      -       +      -
    113D  LEU*     5.6     6.5    -      -       +      -
    155D  PHE*     3.1    39.8    +      -       +      +
    156D  VAL*     2.9    10.1    +      -       +      +
    158D  ALA*     1.3    81.2    -      -       +      +
    160D  ILE*     1.3    63.2    +      -       +      +
    162D  SER*     3.3     5.4    +      -       -      +
    163D  ASN*     3.0    32.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 160 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     31D  LEU*     3.9    20.0    -      -       +      -
    116D  TYR*     3.6    13.2    -      -       -      +
    137D  GLU*     3.8    43.3    -      -       +      +
    139D  PHE*     3.4    35.7    -      -       +      -
    156D  VAL*     2.8    27.9    +      -       +      +
    157D  GLU      4.0     2.7    -      -       -      +
    159D  LEU*     1.3    70.1    -      -       +      +
    161D  GLN*     1.3    66.6    +      -       -      +
    163D  ASN*     3.0    12.6    +      -       -      +
    164D  LEU*     2.8    34.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 161 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     31D  LEU*     3.5    26.9    -      -       +      +
     32D  VAL      4.0    16.6    +      -       -      +
     33D  LYS*     5.1     2.5    -      -       -      +
    157D  GLU      2.8    18.2    +      -       -      +
    158D  ALA*     3.8     6.3    -      -       -      +
    160D  ILE*     1.3    72.9    -      -       -      +
    162D  SER*     1.3    63.8    +      -       -      +
    163D  ASN      3.1     0.2    +      -       -      -
    164D  LEU*     3.1     9.1    +      -       -      +
    165D  ASN*     2.8    65.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 162 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    404B  TYR*     6.0     5.6    -      -       -      -
     57D  PRO*     4.8     8.7    -      -       -      +
     58D  PHE*     4.8    18.0    -      -       -      -
    158D  ALA      2.6    23.8    +      -       -      -
    159D  LEU*     3.6     8.2    +      -       -      +
    160D  ILE      3.3     0.2    -      -       -      -
    161D  GLN*     1.3    77.6    -      -       -      +
    163D  ASN*     1.3    59.9    +      -       -      +
    165D  ASN*     3.8     7.9    -      -       -      +
    166D  SER*     2.9    31.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 163 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     55D  TYR*     3.6    13.7    -      -       +      -
     56D  LYS*     3.6    41.8    -      -       +      +
     57D  PRO*     3.7    14.5    -      -       -      +
     58D  PHE*     5.4     5.2    +      -       -      +
    137D  GLU*     5.3     7.2    +      -       -      +
    159D  LEU*     3.0    26.3    +      -       -      +
    160D  ILE*     3.0    15.2    +      -       -      +
    162D  SER*     1.3    77.6    -      -       -      +
    164D  LEU*     1.3    59.0    +      -       +      +
    166D  SER*     3.3     5.2    +      -       -      -
    167D  LEU*     2.9    27.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 164 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     31D  LEU*     4.0    37.0    -      -       +      +
     32D  VAL      4.4     1.6    -      -       -      +
     33D  LYS*     3.7    30.3    -      -       +      +
     55D  TYR*     5.9     2.2    -      -       +      -
    120D  ILE*     4.4    11.2    -      -       +      -
    135D  ALA*     4.2    24.7    -      -       +      +
    137D  GLU*     4.2    18.4    -      -       +      +
    160D  ILE*     2.8    28.5    +      -       +      +
    161D  GLN*     3.7     9.9    -      -       -      +
    163D  ASN*     1.3    72.7    -      -       +      +
    165D  ASN*     1.3    59.0    +      -       -      +
    167D  LEU*     3.1    12.5    +      -       +      +
    168D  ALA*     2.9    29.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 165 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     33D  LYS*     3.5    29.1    +      -       -      +
    161D  GLN*     2.8    50.6    +      -       -      +
    162D  SER*     3.8     7.1    -      -       -      +
    164D  LEU*     1.3    72.7    -      -       -      +
    166D  SER*     1.3    62.1    +      -       -      +
    168D  ALA*     3.5     2.3    +      -       -      +
    169D  ASP*     3.0    23.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 166 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     55D  TYR*     2.5    32.2    +      -       -      -
     57D  PRO*     4.1    16.1    -      -       -      +
    162D  SER      2.9    17.8    +      -       -      -
    163D  ASN      3.7     1.3    -      -       -      -
    165D  ASN*     1.3    74.2    -      -       -      +
    167D  LEU*     1.3    60.6    +      -       -      +
    169D  ASP*     3.3     6.8    +      -       -      +
    170D  VAL*     2.8    36.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 167 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     35D  ILE*     3.8    22.4    -      -       +      -
     42D  VAL*     4.1     3.8    -      -       +      -
     45D  ILE*     3.8    21.5    -      -       +      -
     46D  VAL*     3.6    27.8    -      -       +      -
     55D  TYR*     3.5    41.0    -      -       +      -
    120D  ILE*     4.8     2.2    -      -       +      -
    135D  ALA*     4.8     5.4    -      -       +      -
    163D  ASN      2.9     9.1    +      -       -      +
    164D  LEU*     3.1    24.4    +      -       +      +
    166D  SER*     1.3    74.1    -      -       -      +
    168D  ALA*     1.3    65.3    +      -       -      +
    170D  VAL*     3.2     1.2    +      -       -      -
    171D  THR*     2.9    37.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 168 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     33D  LYS*     3.5    32.3    -      -       -      +
     35D  ILE*     3.8    21.7    -      -       +      +
    164D  LEU      2.9     7.3    +      -       -      +
    165D  ASN      3.5     6.7    -      -       -      +
    167D  LEU*     1.3    76.4    -      -       -      +
    169D  ASP*     1.3    62.7    +      -       -      +
    171D  THR*     3.3     0.9    +      -       -      -
    172D  GLU*     2.9    45.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 169 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    323B  GLU*     5.7     0.7    -      -       -      +
    165D  ASN      3.0    14.7    +      -       -      +
    166D  SER*     3.4    11.7    -      -       -      +
    168D  ALA*     1.3    75.2    -      -       -      +
    170D  VAL*     1.3    67.2    +      -       +      +
    172D  GLU*     4.1     6.4    -      -       -      +
    173D  ARG*     3.1    34.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 170 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45D  ILE*     3.7    24.9    -      -       +      -
     54D  LYS*     3.8    25.4    -      -       +      +
     55D  TYR*     4.3     6.7    -      -       +      -
    166D  SER*     2.8    33.6    +      -       -      +
    167D  LEU      3.9     2.5    -      -       -      +
    169D  ASP*     1.3    76.5    -      -       +      +
    171D  THR*     1.3    59.7    +      -       +      +
    173D  ARG*     3.4    32.6    +      -       -      +
    174D  LEU*     3.1    29.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 171 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     35D  ILE*     3.1    23.7    -      -       -      +
     37D  ALA*     3.9    14.3    -      -       -      +
     41D  LEU*     4.3     6.9    -      -       +      +
     42D  VAL*     4.0    24.2    -      -       +      -
     45D  ILE*     3.9    23.1    -      -       +      -
    167D  LEU*     2.9    36.3    +      -       +      +
    170D  VAL*     1.3    73.0    -      -       +      +
    172D  GLU*     1.3    62.8    +      -       -      +
    174D  LEU*     3.3     8.1    +      -       -      +
    175D  GLN*     2.9    28.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 172 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     34D  HIS      4.5     1.9    -      -       -      +
     35D  ILE*     3.6    10.6    -      -       +      +
     36D  LYS*     2.7    75.1    +      -       +      +
    168D  ALA*     2.9    29.5    +      -       -      +
    169D  ASP*     4.1     5.1    +      -       -      +
    171D  THR*     1.3    77.8    +      -       -      +
    173D  ARG*     1.3    62.9    +      -       -      +
    175D  GLN*     3.3     8.1    +      -       -      +
    176D  ALA*     3.1    22.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 173 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    169D  ASP*     3.1    29.2    +      -       -      +
    170D  VAL*     3.6    37.3    -      -       -      +
    171D  THR      3.2     0.2    -      -       -      -
    172D  GLU*     1.3    78.7    -      -       -      +
    174D  LEU*     1.3    77.3    +      -       -      +
    176D  ALA*     3.4     6.0    +      -       -      +
    177D  GLU*     2.9    58.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 174 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41D  LEU*     4.2    23.3    -      -       +      +
     45D  ILE*     3.3    36.8    -      -       +      -
    170D  VAL*     3.1    21.6    +      -       +      +
    171D  THR*     3.3     5.6    +      -       -      +
    173D  ARG*     1.3    89.1    -      -       -      +
    175D  GLN*     1.3    57.3    +      -       -      +
    177D  GLU*     3.4    22.3    +      -       +      +
    178D  SER*     3.2    25.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 175 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     36D  LYS      4.2    11.4    -      -       -      +
     37D  ALA*     4.4     4.8    -      -       +      -
     38D  PRO*     3.4    34.6    -      -       -      +
     40D  HIS*     5.9     0.2    -      -       -      -
     41D  LEU*     3.6    12.3    -      -       +      +
    171D  THR      2.9    17.8    +      -       -      +
    172D  GLU*     3.3     9.4    -      -       -      +
    173D  ARG      3.1     0.2    -      -       -      -
    174D  LEU*     1.3    74.8    -      -       -      +
    176D  ALA*     1.3    65.4    +      -       -      +
    178D  SER*     2.5    32.1    +      -       -      -
    179D  MET*     3.3    28.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 176 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    172D  GLU      3.1     9.5    +      -       -      +
    173D  ARG*     3.8     7.9    -      -       -      +
    175D  GLN*     1.3    75.1    -      -       -      +
    177D  GLU*     1.3    59.4    +      -       +      +
    178D  SER      2.9    10.3    +      -       -      -
    179D  MET*     3.0    26.1    +      -       -      +
    180D  GLU*     4.0     6.2    +      -       -      +
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Residues in contact with GLU 177 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    173D  ARG*     2.9    54.5    +      -       +      +
    174D  LEU*     3.4    28.1    -      -       +      +
    175D  GLN      3.2     0.2    -      -       -      -
    176D  ALA*     1.3    75.5    -      -       +      +
    178D  SER*     1.3    58.0    +      -       -      +
    180D  GLU*     4.1    13.7    -      -       -      +
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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