Contacts of the helix formed by residues 112 - 137 (chain D) in PDB entry 3BUW


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 ASN 112 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108D  THR      3.4    10.2    +      -       -      +
    109D  LEU*     3.1    19.3    +      -       +      +
    111D  GLU*     1.3    74.0    -      -       -      +
    113D  GLU*     1.3    65.6    +      -       -      +
    114D  TYR*     2.9    13.4    +      -       -      +
    115D  PHE*     2.8    33.7    +      -       +      +
    116D  ARG*     3.0    26.0    +      -       -      +
    169D  PHE*     4.6     2.4    -      -       -      -
    174D  PHE*     3.4    48.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 113 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     47D  PRO*     4.2    24.7    -      -       +      +
     48D  PRO*     5.2     0.3    -      -       -      +
    111D  GLU      3.2     6.6    +      -       -      +
    112D  ASN*     1.3    72.2    +      -       -      +
    114D  TYR*     1.3    64.0    +      -       -      +
    116D  ARG*     3.4    14.9    +      -       -      +
    117D  VAL*     3.1    30.3    +      -       +      +
    197D  LYS*     4.9    17.3    +      -       -      +
    198D  THR      5.3     1.2    +      -       -      -
    199D  ILE*     3.7    32.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 114 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    112D  ASN*     2.9    10.5    +      -       -      +
    113D  GLU*     1.3    75.0    -      -       -      +
    115D  PHE*     1.3    61.2    +      -       -      +
    117D  VAL*     3.2     3.3    +      -       -      +
    118D  PHE*     2.9    49.1    +      +       +      +
    164D  GLU*     2.6    49.6    +      -       +      +
    165D  LEU*     3.5    17.0    +      -       +      -
    168D  ILE*     3.6    30.7    -      -       +      -
    169D  PHE*     3.7    19.3    -      +       -      -
    174D  PHE*     4.4     2.9    -      -       +      -
    198D  THR*     3.9    33.0    -      -       +      -
    199D  ILE*     4.0    26.4    -      -       +      +
    233D  ASN*     6.3     0.4    -      -       -      -
    237D  SER*     4.5     4.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 115 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     51D  VAL*     3.4    33.0    -      -       +      -
     56D  VAL*     5.0     4.0    -      -       +      -
     95D  LEU*     3.9    25.6    -      -       +      -
     98D  ILE*     4.4    13.9    -      -       +      -
     99D  LEU*     5.0     6.7    -      -       +      -
    106D  MET*     6.2     0.2    -      -       +      -
    109D  LEU*     3.6    41.3    -      -       +      +
    112D  ASN*     2.8    30.2    +      -       +      +
    114D  TYR*     1.3    77.4    -      -       -      +
    116D  ARG*     1.3    57.9    +      -       -      +
    118D  PHE*     3.3     3.6    +      +       -      +
    119D  MET*     2.9    55.4    +      -       +      +
    165D  LEU*     4.8     6.7    -      -       +      -
    169D  PHE*     4.0    22.2    -      +       +      -
----------------------------------------------------------
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Residues in contact with ARG 116 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     47D  PRO*     4.2    20.9    +      -       -      +
     48D  PRO*     3.3    31.3    +      -       +      +
     49D  GLY*     3.2    24.5    -      -       -      +
     50D  THR*     3.5    18.3    +      -       -      +
     51D  VAL*     3.5    13.6    -      -       +      +
    110D  GLY      3.2    28.0    -      -       -      +
    111D  GLU*     3.4    22.0    +      -       -      +
    112D  ASN      3.0    16.1    +      -       -      +
    113D  GLU*     3.8    14.8    +      -       -      +
    114D  TYR      3.3     0.2    -      -       -      -
    115D  PHE*     1.3    74.6    -      -       -      +
    117D  VAL*     1.3    62.6    +      -       -      +
    119D  MET*     3.6     1.4    +      -       -      +
    120D  GLU*     3.1    17.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 117 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     47D  PRO*     5.4     0.4    -      -       +      -
     48D  PRO*     3.5    28.5    -      -       +      -
    113D  GLU*     3.1    20.2    -      -       +      +
    114D  TYR*     3.2     7.5    +      -       +      +
    116D  ARG*     1.3    72.8    -      -       -      +
    118D  PHE*     1.3    66.7    +      -       -      +
    120D  GLU*     3.3     3.7    +      -       -      +
    121D  ASN*     3.0    22.5    +      -       -      +
    199D  ILE*     3.5    24.0    -      -       +      -
    233D  ASN*     3.4    26.7    -      -       +      +
    235D  TYR*     3.4    30.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 118 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91D  THR*     4.5    11.7    -      -       +      -
     95D  LEU*     4.4     3.6    -      -       +      -
    114D  TYR*     2.9    44.5    +      -       +      +
    115D  PHE*     3.6     6.3    -      +       -      +
    117D  VAL*     1.3    78.2    -      -       -      +
    119D  MET*     1.3    72.0    +      -       +      +
    121D  ASN*     3.2     9.0    +      -       +      +
    122D  LEU*     2.9    51.5    +      -       +      +
    161D  MET*     3.4    44.2    -      -       +      -
    164D  GLU*     3.9     6.7    -      -       -      -
    165D  LEU*     3.9    38.6    -      -       +      -
    231D  THR*     6.2     0.2    -      -       +      -
    233D  ASN*     5.6     1.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with MET 119 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     51D  VAL*     3.9    17.0    -      -       +      -
     55D  MET*     4.4     2.5    -      -       -      -
     56D  VAL*     4.0    24.9    -      -       +      +
     59D  CYS*     3.8    34.3    -      -       +      -
     95D  LEU*     4.0    18.4    -      -       +      -
    115D  PHE*     2.9    51.7    +      -       +      +
    118D  PHE*     1.3    91.5    -      -       -      +
    120D  GLU*     1.3    61.9    +      -       -      +
    122D  LEU*     3.3     4.1    +      -       -      +
    123D  MET*     3.0    45.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 120 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48D  PRO*     3.1    37.6    -      -       +      +
     49D  GLY      4.5     1.7    +      -       -      -
     55D  MET*     5.6     1.7    -      -       -      -
    116D  ARG      3.1    18.8    +      -       -      +
    117D  VAL*     3.6     4.8    -      -       -      +
    118D  PHE      3.2     0.2    -      -       -      -
    119D  MET*     1.3    76.5    -      -       -      +
    121D  ASN*     1.3    63.4    +      -       -      +
    123D  MET*     3.5     6.6    +      -       -      +
    124D  LYS*     3.1    24.1    +      -       +      +
    235D  TYR*     4.8     9.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 121 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    117D  VAL      3.0    17.0    +      -       -      +
    118D  PHE*     3.2     8.5    +      -       +      +
    120D  GLU*     1.3    76.5    -      -       -      +
    122D  LEU*     1.3    53.8    +      -       -      +
    124D  LYS*     3.2     5.9    +      -       -      +
    125D  LYS*     2.7    66.3    +      -       -      +
    161D  MET*     3.6    23.4    -      -       -      +
    231D  THR*     3.0    27.5    +      -       -      -
    233D  ASN*     3.5    28.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 122 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     59D  CYS*     3.0    31.9    -      -       -      -
     63D  MET*     3.9    15.7    -      -       +      -
     88D  LEU*     5.1     0.2    -      -       +      -
     91D  THR*     4.3     6.5    -      -       +      -
     95D  LEU*     3.8    22.7    -      -       +      -
    118D  PHE*     2.9    37.6    +      -       +      +
    119D  MET*     3.7     7.9    -      -       -      +
    120D  GLU      3.3     0.2    -      -       -      -
    121D  ASN*     1.3    77.4    -      -       -      +
    123D  MET*     1.3    59.4    +      -       -      +
    125D  LYS*     3.9     3.1    -      -       -      +
    126D  THR*     2.9    48.5    +      -       +      +
    158D  PHE*     4.0    18.4    -      -       +      -
    161D  MET*     5.2     7.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 123 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     55D  MET*     3.7    42.2    -      -       +      +
     58D  LYS*     5.3     4.5    -      -       +      -
     59D  CYS*     3.0    41.7    -      -       -      +
     62D  LEU*     3.9    16.6    -      -       +      -
    119D  MET*     3.0    44.3    +      -       +      +
    120D  GLU*     3.8     6.1    -      -       -      +
    122D  LEU*     1.3    75.6    -      -       -      +
    124D  LYS*     1.3    64.1    +      -       -      +
    126D  THR*     3.0    16.9    +      -       -      -
    127D  LYS*     3.1    28.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 124 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    120D  GLU*     3.1    19.5    +      -       +      +
    121D  ASN*     3.2    12.1    +      -       -      +
    123D  MET*     1.3    78.5    -      -       -      +
    125D  LYS*     1.3    59.3    +      -       -      +
    127D  LYS*     3.4     6.7    +      -       +      +
    128D  GLN*     2.8    74.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 125 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121D  ASN*     2.7    52.2    +      -       -      +
    122D  LEU      4.0     2.0    -      -       -      +
    124D  LYS*     1.3    75.6    -      -       -      +
    126D  THR*     1.3    56.5    +      -       -      +
    128D  GLN*     3.3    26.9    +      -       -      +
    129D  THR*     2.9    32.6    +      -       -      -
    154D  LEU*     3.9    20.8    -      -       +      +
    157D  ILE*     3.9    12.1    -      -       +      -
    158D  PHE*     3.9    21.3    -      -       +      -
    161D  MET*     4.0     9.6    -      -       +      -
    231D  THR      3.6    16.4    -      -       -      -
    232D  CYS*     2.9    28.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 126 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     59D  CYS*     5.2     0.8    -      -       -      +
     62D  LEU*     3.4    25.1    -      -       +      +
     63D  MET*     3.8    33.0    -      -       +      +
     66D  VAL*     3.8    10.5    -      -       +      +
     88D  LEU*     4.9     0.9    -      -       +      -
    122D  LEU*     2.9    31.1    +      -       +      +
    123D  MET*     3.0    12.1    +      -       -      -
    125D  LYS*     1.3    72.4    -      -       -      +
    127D  LYS*     1.3    59.9    +      -       -      +
    129D  THR*     3.2     3.0    +      -       -      -
    130D  ILE*     2.9    36.3    +      -       -      +
    158D  PHE*     4.0    14.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 127 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     58D  LYS*     4.6    11.1    -      -       -      +
     62D  LEU*     4.1    28.9    -      -       +      -
    123D  MET*     3.1    32.0    +      -       +      +
    124D  LYS*     3.7     6.5    -      -       +      +
    126D  THR*     1.3    76.6    +      -       -      +
    128D  GLN*     1.3    58.9    +      -       +      +
    130D  ILE*     3.2     9.1    +      -       +      +
    131D  SER*     2.9    36.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 128 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    124D  LYS*     2.8    65.4    +      -       +      +
    125D  LYS*     3.4    38.2    +      -       -      +
    127D  LYS*     1.3    77.8    -      -       +      +
    129D  THR*     1.3    56.8    +      -       -      +
    131D  SER*     3.4     6.1    +      -       -      -
    132D  LEU*     2.9    28.8    +      -       -      +
    154D  LEU*     3.9    17.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with THR 129 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     66D  VAL*     3.8    29.8    -      -       +      -
    125D  LYS      2.9    15.4    +      -       -      -
    126D  THR      3.6     6.7    -      -       -      -
    128D  GLN*     1.3    74.8    -      -       -      +
    130D  ILE*     1.3    65.5    +      -       -      +
    132D  LEU*     3.2    24.1    +      -       +      +
    133D  PHE*     3.2    18.9    +      -       +      -
    151D  LEU*     3.9    27.4    -      -       +      -
    154D  LEU*     3.9    11.9    -      -       +      +
    158D  PHE*     3.6    17.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 130 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     62D  LEU*     3.8    43.5    -      -       +      +
     65D  LYS*     3.9    44.4    -      -       +      +
     66D  VAL*     3.8    12.6    -      -       +      -
     69D  LEU*     4.1    12.2    -      -       +      +
    126D  THR      2.9    22.9    +      -       -      +
    127D  LYS*     3.6     6.5    -      -       +      +
    129D  THR*     1.3    75.8    -      -       -      +
    131D  SER*     1.3    64.3    +      -       -      +
    133D  PHE*     3.3     6.4    +      -       -      +
    134D  LYS*     3.2    22.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 131 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    127D  LYS*     2.9    21.1    +      -       -      +
    128D  GLN*     3.7     6.1    -      -       -      -
    130D  ILE*     1.3    75.3    -      -       -      +
    132D  LEU*     1.3    66.1    +      -       -      +
    134D  LYS*     3.0    16.6    -      -       -      +
    135D  GLU*     2.9    44.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 132 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128D  GLN      2.9    14.1    +      -       -      +
    129D  THR*     3.2    15.0    -      -       +      +
    131D  SER*     1.3    76.2    -      -       -      +
    133D  PHE*     1.3    54.3    +      -       -      +
    135D  GLU*     5.1     1.8    -      -       -      -
    136D  GLY*     2.8    35.0    +      -       -      +
    140D  MET*     3.8    10.4    -      -       +      +
    147D  PRO*     3.4    34.8    -      -       +      +
    150D  ASN*     3.9    24.0    -      -       +      +
    151D  LEU*     3.6    32.5    -      -       +      +
    154D  LEU*     5.3     4.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 133 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     69D  LEU*     3.6    43.3    -      -       +      -
     70D  CYS*     3.7    24.5    -      -       -      -
     72D  ASN*     5.8     0.2    -      -       +      -
     75D  LEU*     3.6    36.8    -      -       +      -
    129D  THR*     3.2    24.7    +      -       +      -
    130D  ILE      3.6     6.7    -      -       -      +
    131D  SER      3.2     0.4    -      -       -      -
    132D  LEU*     1.3    79.6    -      -       -      +
    134D  LYS*     1.3    61.7    +      -       -      +
    137D  LYS*     3.1    21.8    +      -       -      +
    140D  MET*     3.8    40.3    -      -       +      +
    141D  TYR*     5.2     7.9    -      +       -      -
    151D  LEU*     4.1    12.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 134 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    130D  ILE*     3.2    10.1    +      -       +      +
    131D  SER*     3.0    32.3    -      -       -      +
    133D  PHE*     1.3    79.7    -      -       -      +
    135D  GLU*     1.3    75.1    +      -       +      +
    137D  LYS*     3.5    24.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 135 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    131D  SER*     2.9    35.4    +      -       -      +
    132D  LEU*     4.4     1.6    -      -       -      +
    134D  LYS*     1.3    91.5    -      -       +      +
    136D  GLY*     1.3    65.1    +      -       -      +
    137D  LYS*     3.3    15.3    -      -       -      +
    139D  ARG*     5.5     2.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 136 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132D  LEU*     2.8    23.7    +      -       -      -
    135D  GLU*     1.3    71.5    -      -       -      +
    137D  LYS*     1.3    72.2    +      -       -      +
    138D  GLU*     3.6     2.8    -      -       -      +
    139D  ARG*     3.1    27.3    +      -       -      +
    140D  MET*     4.2     4.3    -      -       -      -
    147D  PRO*     4.3    23.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 137 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133D  PHE      3.1    15.2    +      -       -      +
    134D  LYS      3.5    20.4    +      -       -      +
    135D  GLU*     3.7    10.9    -      -       -      +
    136D  GLY*     1.3    79.8    -      -       -      +
    138D  GLU*     1.3    84.3    +      -       -      +
    139D  ARG      3.2     0.9    +      -       -      -
    140D  MET*     3.2    20.5    +      -       -      +
    141D  TYR*     4.0     9.8    +      -       -      -
----------------------------------------------------------
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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