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


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 B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108B  THR*     3.0    10.3    +      -       +      +
    109B  LEU*     3.0    19.6    +      -       +      +
    111B  GLU*     1.3    75.1    -      -       -      +
    113B  GLU*     1.3    61.7    +      -       -      +
    114B  TYR*     3.3    12.6    +      -       -      +
    115B  PHE*     3.0    31.5    +      -       +      +
    116B  ARG*     2.9    30.1    +      -       -      +
    169B  PHE*     4.2     3.0    -      -       -      -
    174B  PHE*     3.5    45.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 113 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    111B  GLU      3.2     3.8    +      -       -      +
    112B  ASN*     1.3    71.5    -      -       -      +
    114B  TYR*     1.3    62.9    +      -       -      +
    116B  ARG*     3.5    24.5    +      -       -      +
    117B  VAL*     2.8    34.0    +      -       +      +
    197B  LYS*     3.1    28.9    +      -       -      -
    198B  THR      5.3     1.6    +      -       -      -
    199B  ILE*     3.9    21.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 114 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    112B  ASN*     3.3     7.6    +      -       -      +
    113B  GLU*     1.3    78.8    -      -       -      +
    115B  PHE*     1.3    61.0    +      -       -      +
    117B  VAL*     3.2     4.7    +      -       -      +
    118B  PHE*     2.9    48.3    +      -       +      +
    164B  GLU*     2.8    46.4    +      -       +      +
    165B  LEU*     3.5    15.6    +      -       +      -
    168B  ILE*     3.5    34.8    -      -       +      -
    169B  PHE*     3.7    20.9    -      +       -      -
    174B  PHE*     4.1     4.7    -      -       +      -
    198B  THR*     3.8    31.8    -      -       +      -
    199B  ILE*     4.3    25.9    -      -       +      +
    237B  SER*     4.5     4.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 115 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     51B  VAL*     4.0    27.4    -      -       +      -
     56B  VAL*     5.0     8.3    -      -       +      -
     95B  LEU*     3.9    24.9    -      -       +      -
     98B  ILE*     4.2    16.2    -      -       +      -
     99B  LEU*     5.3     4.3    -      -       +      -
    106B  MET*     6.1     0.9    -      -       +      -
    109B  LEU*     3.6    48.2    -      -       +      +
    110B  GLY*     5.6     0.2    -      -       -      -
    112B  ASN*     3.0    22.5    +      -       +      +
    113B  GLU      3.4     0.2    -      -       -      -
    114B  TYR*     1.3    81.4    -      -       -      +
    116B  ARG*     1.3    56.6    +      -       -      +
    118B  PHE*     3.6     3.3    -      +       -      +
    119B  MET*     2.8    52.6    +      -       +      +
    165B  LEU*     4.5     7.4    -      -       +      -
    169B  PHE*     3.7    20.4    -      +       +      -
----------------------------------------------------------
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Residues in contact with ARG 116 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48B  PRO*     2.7    38.1    +      -       +      +
     49B  GLY      2.9    29.2    -      -       -      +
     50B  THR*     3.4     4.9    +      -       -      +
     51B  VAL*     3.4    14.3    -      -       +      +
     55B  MET*     5.8     0.2    -      -       -      +
    110B  GLY      3.1    23.1    -      -       -      +
    111B  GLU*     2.6    35.6    +      -       -      +
    112B  ASN      2.9    25.3    +      -       -      +
    113B  GLU*     3.8    23.7    +      -       -      +
    114B  TYR      3.3     0.2    -      -       -      -
    115B  PHE*     1.3    75.8    -      -       -      +
    117B  VAL*     1.3    59.8    +      -       +      +
    119B  MET*     3.4     1.9    +      -       -      +
    120B  GLU*     2.9    30.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 117 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48B  PRO*     4.0    24.9    -      -       +      -
    113B  GLU*     2.8    24.0    +      -       +      +
    114B  TYR      3.5     5.4    -      -       -      +
    116B  ARG*     1.3    75.8    -      -       +      +
    118B  PHE*     1.3    58.5    +      -       -      +
    120B  GLU*     3.3     4.5    +      -       -      +
    121B  ASN*     2.9    28.2    +      -       -      +
    199B  ILE*     3.6    28.5    -      -       +      -
    233B  ASN*     3.6    12.3    -      -       +      +
    235B  TYR*     3.4    37.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 118 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91B  THR*     4.7     8.1    -      -       +      -
     95B  LEU*     4.4     6.5    -      -       +      -
    114B  TYR*     2.9    50.2    +      -       +      +
    115B  PHE*     3.6     5.8    -      +       -      +
    117B  VAL*     1.3    73.8    -      -       -      +
    119B  MET*     1.3    69.2    +      -       +      +
    121B  ASN*     3.1     9.4    +      -       +      +
    122B  LEU*     2.8    54.0    +      -       +      +
    161B  MET*     3.3    45.0    -      -       +      +
    164B  GLU*     3.9     7.6    -      -       -      -
    165B  LEU*     3.7    39.0    -      -       +      -
    231B  THR*     6.0     0.2    -      -       +      -
    233B  ASN*     5.6     2.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with MET 119 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     51B  VAL*     3.8    26.9    -      -       +      -
     55B  MET*     4.2    12.8    -      -       +      -
     56B  VAL*     3.9    29.2    -      -       +      -
     59B  CYS*     3.8    32.6    -      -       +      -
     95B  LEU*     4.0    28.5    -      -       +      -
    115B  PHE*     2.8    38.2    +      -       +      +
    116B  ARG      3.9     3.1    -      -       -      +
    118B  PHE*     1.3    80.0    -      -       -      +
    120B  GLU*     1.3    63.6    +      -       -      +
    122B  LEU*     3.7     9.7    -      -       +      +
    123B  MET*     3.1    25.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 120 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48B  PRO*     3.0    41.5    -      -       +      +
     49B  GLY      4.7     1.0    +      -       -      -
     55B  MET*     5.1     3.7    -      -       -      -
    116B  ARG      2.9    18.5    +      -       -      +
    117B  VAL*     3.5     6.2    -      -       -      +
    119B  MET*     1.3    76.8    -      -       -      +
    121B  ASN*     1.3    64.3    +      -       -      +
    123B  MET*     3.6     7.8    +      -       -      +
    124B  LYS*     3.1    24.9    +      -       +      +
    235B  TYR*     5.1     5.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 121 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    117B  VAL      2.9    17.6    +      -       -      +
    118B  PHE*     3.5     9.2    -      -       +      +
    120B  GLU*     1.3    76.7    -      -       -      +
    122B  LEU*     1.3    54.5    +      -       -      +
    124B  LYS*     3.2     6.7    +      -       -      +
    125B  LYS*     2.8    63.9    +      -       -      +
    161B  MET*     3.5    21.6    -      -       -      +
    231B  THR*     3.0    32.1    +      -       -      -
    233B  ASN*     3.5    25.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 122 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     59B  CYS*     4.2     2.9    -      -       -      -
     63B  MET*     3.4    36.8    -      -       +      -
     88B  LEU*     5.3     0.7    -      -       +      -
     91B  THR*     4.2    10.3    -      -       +      -
     95B  LEU*     3.7    19.7    -      -       +      -
    118B  PHE*     2.8    36.0    +      -       +      +
    119B  MET*     3.7    15.7    -      -       +      +
    121B  ASN*     1.3    76.7    -      -       -      +
    123B  MET*     1.3    62.6    +      -       -      +
    125B  LYS*     3.3     3.8    +      -       -      -
    126B  THR*     2.9    45.1    +      -       +      +
    158B  PHE*     4.1    16.8    -      -       +      -
    161B  MET*     4.8     8.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 123 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     55B  MET*     3.6    39.5    -      -       +      +
     58B  LYS*     5.3     8.3    -      -       +      -
     59B  CYS*     3.5    25.2    -      -       -      +
     62B  LEU*     3.8    20.9    -      -       +      -
    119B  MET      3.1    12.3    +      -       -      +
    120B  GLU*     3.8     6.3    -      -       -      +
    122B  LEU*     1.3    76.8    -      -       -      +
    124B  LYS*     1.3    62.1    +      -       -      +
    126B  THR*     2.8    19.7    +      -       -      -
    127B  LYS*     3.0    38.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 124 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    120B  GLU*     3.1    21.1    +      -       +      +
    121B  ASN*     3.4    11.0    -      -       -      +
    123B  MET*     1.3    78.3    -      -       -      +
    125B  LYS*     1.3    62.7    +      -       -      +
    127B  LYS*     3.5     8.4    +      -       -      +
    128B  GLN*     2.5    74.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 125 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121B  ASN*     2.8    42.1    +      -       -      +
    122B  LEU      3.9     3.1    -      -       -      +
    124B  LYS*     1.3    75.6    -      -       -      +
    126B  THR*     1.3    63.0    +      -       -      +
    128B  GLN*     3.4    32.3    +      -       -      +
    129B  THR*     2.9    28.9    +      -       -      -
    154B  LEU*     4.8     5.2    -      -       +      +
    157B  ILE*     3.8    23.6    -      -       +      -
    158B  PHE*     3.8     9.6    -      -       +      -
    161B  MET*     3.9    26.5    -      -       +      -
    231B  THR      3.5    15.3    -      -       -      -
    232B  CYS*     2.8    33.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 126 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     59B  CYS*     5.0     1.2    +      -       -      +
     62B  LEU*     3.5    23.9    -      -       +      +
     63B  MET*     3.8    22.9    -      -       +      +
     66B  VAL*     3.7    10.0    -      -       +      +
     88B  LEU*     5.2     0.4    -      -       +      -
    122B  LEU*     2.9    37.4    +      -       +      +
    123B  MET*     2.8    24.3    +      -       -      -
    125B  LYS*     1.3    75.8    -      -       -      +
    127B  LYS*     1.3    61.7    +      -       -      +
    129B  THR*     3.4     3.7    +      -       -      -
    130B  ILE*     3.1    29.6    +      -       -      +
    158B  PHE*     3.9    15.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 127 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     58B  LYS*     4.6    13.3    -      -       -      +
     62B  LEU*     4.0    30.7    -      -       +      -
    123B  MET*     3.0    39.6    +      -       +      +
    124B  LYS*     3.7     7.2    -      -       -      +
    126B  THR*     1.3    76.4    +      -       -      +
    128B  GLN*     1.3    64.2    +      -       -      +
    130B  ILE*     3.2     9.6    +      -       +      +
    131B  SER*     3.0    29.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 128 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    124B  LYS*     2.5    67.5    +      -       +      +
    125B  LYS*     3.6    33.8    +      -       -      +
    126B  THR      3.3     0.2    -      -       -      -
    127B  LYS*     1.3    75.1    -      -       -      +
    129B  THR*     1.3    58.5    +      -       -      +
    131B  SER*     3.3     7.2    +      -       -      -
    132B  LEU*     2.9    29.7    +      -       -      +
    154B  LEU*     4.0    21.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with THR 129 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     66B  VAL*     3.5    31.2    -      -       +      -
     69B  LEU*     5.9     0.2    -      -       +      -
     84B  ILE*     4.7     2.5    -      -       +      -
    125B  LYS      2.9    14.1    +      -       -      -
    126B  THR*     3.5     8.7    -      -       -      -
    127B  LYS      3.2     0.2    -      -       -      -
    128B  GLN*     1.3    79.4    -      -       -      +
    130B  ILE*     1.3    62.1    +      -       -      +
    132B  LEU*     3.3     5.3    +      -       +      +
    133B  PHE*     3.3    27.9    +      -       +      -
    151B  LEU*     4.1    24.9    -      -       +      -
    154B  LEU*     3.6    18.4    -      -       +      +
    158B  PHE*     3.5    16.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 130 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     62B  LEU*     3.9    36.1    -      -       +      +
     65B  LYS*     3.6    51.4    -      -       +      +
     66B  VAL*     3.8    12.1    -      -       +      -
     69B  LEU*     4.2    13.9    -      -       +      +
    126B  THR      3.1    17.5    +      -       -      +
    127B  LYS*     3.2     9.2    +      -       +      +
    129B  THR*     1.3    75.2    -      -       -      +
    131B  SER*     1.3    65.8    +      -       -      +
    133B  PHE*     3.3     5.4    +      -       -      +
    134B  LYS*     3.2    22.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 131 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    127B  LYS*     3.0    18.7    +      -       -      +
    128B  GLN*     3.6     6.9    -      -       -      -
    130B  ILE*     1.3    75.6    -      -       -      +
    132B  LEU*     1.3    61.8    +      -       -      +
    134B  LYS*     4.6     5.8    -      -       -      -
    135B  GLU*     3.0    55.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 132 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128B  GLN      2.9    17.1    +      -       -      +
    129B  THR      3.5     6.5    -      -       -      +
    130B  ILE      3.2     0.2    -      -       -      -
    131B  SER*     1.3    78.0    -      -       -      +
    133B  PHE*     1.3    56.1    +      -       -      +
    135B  GLU*     5.1     1.3    -      -       -      -
    136B  GLY*     2.9    29.0    +      -       -      -
    140B  MET*     3.9    16.6    -      -       +      +
    147B  PRO*     3.6    15.5    -      -       +      +
    150B  ASN*     3.6    32.3    -      -       +      +
    151B  LEU*     3.5    33.7    -      -       +      +
    154B  LEU*     3.8    17.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 133 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     66B  VAL*     5.5     0.2    -      -       +      -
     69B  LEU*     3.7    47.3    -      -       +      -
     70B  CYS*     3.7    23.1    -      -       -      -
     75B  LEU*     3.6    33.2    -      -       +      -
    129B  THR*     3.3    22.3    +      -       +      -
    130B  ILE      3.3     8.5    +      -       -      +
    132B  LEU*     1.3    80.8    -      -       +      +
    134B  LYS*     1.3    57.0    +      -       -      +
    136B  GLY      4.0     0.3    -      -       -      -
    137B  LYS*     3.1    24.6    +      -       -      +
    140B  MET*     4.1    29.2    -      -       +      +
    141B  TYR*     4.9    11.0    -      +       -      -
    151B  LEU*     3.9    23.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 134 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    130B  ILE*     3.2    14.8    +      -       +      +
    131B  SER*     4.0     3.4    -      -       -      +
    132B  LEU      3.3     0.2    -      -       -      -
    133B  PHE*     1.3    79.3    -      -       -      +
    135B  GLU*     1.3    83.5    +      -       +      +
    137B  LYS*     3.0    36.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 135 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    131B  SER*     3.0    38.7    +      -       -      +
    132B  LEU*     4.6     1.3    -      -       -      +
    134B  LYS*     1.3    95.8    -      -       +      +
    136B  GLY*     1.3    57.4    +      -       -      +
    137B  LYS*     3.4    18.0    -      -       -      +
    139B  ARG*     5.4     3.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 136 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132B  LEU*     2.9    18.6    +      -       -      -
    133B  PHE      4.0     0.4    -      -       -      -
    135B  GLU*     1.3    76.3    -      -       -      +
    137B  LYS*     1.3    59.5    +      -       -      +
    138B  GLU*     3.3     0.9    +      -       -      +
    139B  ARG*     2.7    45.6    +      -       -      +
    140B  MET*     4.3     3.4    -      -       -      -
    147B  PRO*     4.5    19.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 137 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133B  PHE      3.1    15.2    +      -       -      +
    134B  LYS*     3.0    23.5    +      -       -      +
    135B  GLU*     4.0    18.7    -      -       -      +
    136B  GLY*     1.3    77.7    -      -       -      +
    138B  GLU*     1.3    78.2    +      -       -      +
    139B  ARG      3.0     5.4    +      -       -      -
    140B  MET*     3.3    18.2    +      -       -      +
    141B  TYR*     4.1     8.0    +      -       -      -
----------------------------------------------------------
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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