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


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 GLU 112 (chain E).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    111E  MET*     1.3    88.8    -      -       +      +
    113E  ALA*     1.3    57.5    +      -       -      +
    114E  GLU      3.2     0.4    -      -       -      -
    115E  ARG*     3.0    43.3    +      -       -      +
    116E  VAL*     3.0    11.2    +      -       -      +
    162E  VAL*     3.6    14.6    -      -       +      +
    163E  ILE*     2.8    32.8    +      -       -      +
    164E  VAL*     3.9     7.4    -      -       +      +
    165E  THR*     3.4    30.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 113 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    111E  MET      3.7     9.5    -      -       -      +
    112E  GLU*     1.3    77.2    -      -       -      +
    114E  GLU*     1.3    65.5    +      -       -      +
    116E  VAL*     3.1    12.4    +      -       -      +
    117E  ARG*     3.0    40.5    +      -       -      +
    164E  VAL*     4.3    11.7    -      -       +      +
    170E  GLN      5.6     1.1    -      -       -      +
    171E  CYS*     6.2     0.7    -      -       -      -
    174E  ALA*     3.9    26.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 114 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    111E  MET*     3.6    20.6    -      -       +      +
    112E  GLU      3.2     0.4    -      -       -      -
    113E  ALA*     1.3    78.2    -      -       -      +
    115E  ARG*     1.3    63.0    +      -       +      +
    117E  ARG*     2.6    60.4    +      -       -      +
    118E  VAL*     3.0    27.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 115 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    111E  MET*     4.4    18.4    -      -       +      +
    112E  GLU*     3.0    32.6    +      -       -      +
    114E  GLU*     1.3    77.7    -      -       +      +
    116E  VAL*     1.3    61.3    -      -       -      +
    118E  VAL*     2.5    36.0    -      -       +      +
    119E  PHE*     3.1    19.6    -      -       +      -
    162E  VAL*     3.7    43.3    -      -       +      +
    163E  ILE      5.4     0.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 116 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    112E  GLU      3.0    13.1    +      -       -      +
    113E  ALA*     3.1    10.7    +      -       -      +
    115E  ARG*     1.3    77.2    -      -       -      +
    117E  ARG*     1.3    57.3    +      -       -      +
    119E  PHE*     3.3     8.7    +      -       -      +
    120E  HIS*     3.0    24.9    +      -       -      +
    159E  GLY*     3.7     9.6    -      -       -      +
    162E  VAL*     3.7    27.1    -      -       +      -
    164E  VAL*     4.1    11.9    -      -       +      -
    174E  ALA*     5.0     3.6    -      -       +      +
    177E  LEU*     3.7    27.8    -      -       +      -
    178E  GLN*     3.9    15.9    -      -       +      +
    181E  MET*     4.0    18.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 117 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    111E  MET*     6.0     0.6    -      -       -      +
    113E  ALA*     3.0    26.1    +      -       -      +
    114E  GLU*     2.6    48.5    +      -       -      +
    116E  VAL*     1.3    73.9    -      -       -      +
    118E  VAL*     1.3    63.8    +      -       -      +
    120E  HIS*     3.2    11.0    +      -       +      +
    121E  LYS*     2.9    22.5    +      -       -      +
    174E  ALA*     5.7     0.2    -      -       -      +
    177E  LEU*     4.4    16.8    -      -       +      -
    174K  GLY*     3.3    29.2    +      -       -      -
    177K  GLY*     3.5    34.2    -      -       -      -
    178K  THR*     3.0    22.2    +      -       -      +
    181K  ALA*     4.7     5.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 118 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    114E  GLU*     3.0    32.4    +      -       +      +
    115E  ARG*     2.5    39.9    -      -       +      +
    117E  ARG*     1.3    73.8    -      -       -      +
    119E  PHE*     1.3    83.7    +      -       +      +
    121E  LYS*     3.0    18.5    +      -       -      +
    122E  GLN*     3.1    18.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 119 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    115E  ARG*     3.1    34.9    +      -       +      -
    116E  VAL*     3.8     3.8    -      -       -      +
    118E  VAL*     1.3    86.9    -      -       +      +
    120E  HIS*     1.3    61.6    +      -       -      +
    122E  GLN*     3.2     3.0    +      -       +      +
    123E  ALA*     2.7    31.1    +      -       -      +
    155E  GLU*     3.6    35.0    -      -       -      +
    158E  LYS*     3.6    39.5    -      -       +      -
    159E  GLY*     3.6    22.9    -      -       -      -
    162E  VAL*     3.7    22.2    -      -       +      -
    181E  MET*     4.3     2.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with HIS 120 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    116E  VAL      3.0    11.3    +      -       -      +
    117E  ARG*     3.2    12.8    +      -       -      +
    119E  PHE*     1.3    76.1    -      -       -      +
    121E  LYS*     1.3    64.4    +      -       +      +
    123E  ALA*     4.2     2.2    -      -       -      -
    124E  PHE*     2.7    44.4    +      +       +      +
    177E  LEU*     4.8     2.9    -      -       +      +
    181E  MET*     3.4    21.4    -      -       +      +
    180K  VAL*     5.7     1.1    -      -       +      -
    181K  ALA*     3.4    42.7    +      -       +      -
    184K  GLU*     2.8    38.7    +      -       +      -
    185K  GLN*     3.1    31.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 121 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    117E  ARG      2.9    13.4    +      -       -      +
    118E  VAL*     3.0    12.3    +      -       -      +
    120E  HIS*     1.3    84.3    -      -       +      +
    122E  GLN*     1.3    75.1    +      -       -      +
    124E  PHE*     3.7     3.8    -      -       -      +
    125E  GLU*     3.0    23.7    +      -       +      +
    154K  GLN*     5.4     4.2    -      -       -      +
    158K  ASP*     4.2    22.0    -      -       -      +
    163K  ASP      5.3    10.5    -      -       -      -
    184K  GLU*     5.7     0.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 122 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    118E  VAL*     3.1    13.6    +      -       +      +
    119E  PHE*     3.7     1.8    -      -       +      +
    121E  LYS*     1.3    92.7    -      -       -      +
    123E  ALA*     1.3    63.5    +      -       -      +
    124E  PHE      3.1     0.5    +      -       -      -
    125E  GLU*     3.3     6.6    +      -       -      +
    126E  TYR*     3.0    50.7    +      -       +      -
    155E  GLU*     3.2    32.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 123 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    119E  PHE      2.7    21.2    +      -       -      +
    120E  HIS*     3.6     6.7    -      -       -      +
    122E  GLN*     1.3    72.9    -      -       -      +
    124E  PHE*     1.3    57.8    +      -       -      +
    126E  TYR*     3.3     0.7    +      -       -      +
    127E  ILE*     2.9    38.0    +      -       +      +
    152E  GLY*     4.0     7.4    -      -       -      +
    155E  GLU*     3.6    18.3    -      -       +      +
    156E  LEU*     3.6    34.3    -      -       +      +
    185K  GLN*     5.1     1.8    -      -       -      +
    188K  LEU*     5.4     0.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 124 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    120E  HIS*     2.7    33.0    +      +       +      +
    121E  LYS*     3.7     3.1    -      -       -      +
    123E  ALA*     1.3    71.5    -      -       -      +
    125E  GLU*     1.3    64.9    +      -       -      +
    127E  ILE*     4.0     0.3    -      -       -      +
    128E  SER*     2.8    46.3    +      -       -      -
    155K  GLU      5.3     0.2    -      -       -      -
    158K  ASP*     3.7    12.1    -      -       +      -
    159K  GLU*     3.7    44.9    -      -       +      -
    184K  GLU*     3.7    52.9    -      -       +      -
    187K  GLU*     3.5    20.0    -      -       +      -
    188K  LEU*     3.9    24.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 125 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121E  LYS*     3.0    14.1    +      -       +      +
    122E  GLN*     3.5    13.7    -      -       -      +
    124E  PHE*     1.3    80.9    -      -       -      +
    126E  TYR*     1.3    74.1    +      -       +      +
    128E  SER*     3.0     5.1    +      -       -      -
    129E  ILE*     2.9    43.9    +      -       -      +
    158K  ASP      5.2     4.7    -      -       -      +
    159K  GLU      5.4     0.5    -      -       -      +
    161K  GLY*     3.6    27.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 126 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    122E  GLN*     3.0    37.9    +      -       +      +
    125E  GLU*     1.3    90.6    -      -       +      +
    127E  ILE*     1.3    58.4    +      -       -      +
    129E  ILE*     3.2     2.0    +      -       -      +
    130E  ALA*     2.9    26.9    +      -       -      +
    148E  TRP*     3.6    53.6    -      +       +      +
    151E  LYS*     3.6    37.3    -      -       +      +
    152E  GLY*     3.6     6.1    -      -       -      +
    155E  GLU*     3.9    22.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 127 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    123E  ALA      2.9    18.5    +      -       -      +
    124E  PHE      4.4     0.2    -      -       -      +
    126E  TYR*     1.3    76.7    -      -       -      +
    128E  SER*     1.3    56.5    +      -       -      +
    130E  ALA*     3.6     4.9    -      -       -      +
    131E  LEU*     2.8    47.5    +      -       +      +
    148E  TRP      4.9     1.3    -      -       -      +
    149E  TYR*     4.5    18.4    -      -       +      +
    152E  GLY*     3.7    22.0    -      -       -      -
    153E  ILE      4.7     1.1    -      -       -      +
    156E  LEU*     4.0    31.2    -      -       +      -
    184E  ASN*     5.7     0.9    -      -       +      +
    188E  ALA*     5.0     8.5    -      -       +      -
    188K  LEU*     4.0    28.0    -      -       +      -
    192K  LEU*     5.1     9.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 128 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    124E  PHE*     2.8    41.5    +      -       -      -
    125E  GLU*     3.0     7.8    +      -       -      -
    127E  ILE*     1.3    76.1    -      -       -      +
    129E  ILE*     1.3    61.0    +      -       -      +
    131E  LEU*     3.2    10.7    +      -       -      +
    132E  ARG*     2.9    27.5    +      -       -      +
    158K  ASP      5.5     0.4    -      -       -      -
    159K  GLU*     3.4    34.5    +      -       -      -
    188K  LEU*     4.5     3.0    -      -       -      +
    191K  ARG*     4.2     6.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 129 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    125E  GLU*     2.9    37.1    +      -       -      +
    126E  TYR*     3.7     6.3    -      -       -      +
    128E  SER*     1.3    76.7    -      -       -      +
    130E  ALA*     1.3    65.8    +      -       -      +
    132E  ARG*     2.8    23.9    +      -       +      +
    133E  ILE*     2.9    29.6    +      -       +      +
    148E  TRP*     4.3    30.7    -      -       +      -
    159K  GLU      5.9     2.5    -      -       -      +
    160K  ALA      6.4     1.3    -      -       -      -
    161K  GLY      6.3     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 130 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    126E  TYR      2.9    17.5    +      -       -      +
    127E  ILE*     3.6     6.5    -      -       -      +
    129E  ILE*     1.3    75.4    -      -       -      +
    131E  LEU*     1.3    58.5    +      -       -      +
    133E  ILE*     3.4     0.4    +      -       -      -
    134E  ASP*     2.9    33.1    +      -       -      +
    145E  ALA*     3.7     8.8    -      -       -      +
    148E  TRP*     3.6     9.1    -      -       +      +
    149E  TYR*     3.6    49.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 131 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    127E  ILE*     2.8    41.1    +      -       +      +
    128E  SER*     3.7     6.5    -      -       -      +
    130E  ALA*     1.3    73.8    -      -       -      +
    132E  ARG*     1.3    66.1    +      -       -      +
    134E  ASP*     3.7     3.8    -      -       -      +
    135E  GLU*     2.9    42.2    +      -       -      +
    149E  TYR*     3.8    14.6    -      -       -      +
    188K  LEU*     3.8    19.3    -      -       +      -
    191K  ARG*     4.0    45.3    -      -       +      +
    192K  LEU*     3.9    23.1    -      -       +      -
    194K  ARG*     5.3     8.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 132 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128E  SER      2.9    14.2    +      -       -      +
    129E  ILE*     2.8    21.7    +      -       +      +
    131E  LEU*     1.3    80.1    -      -       -      +
    133E  ILE*     1.3    69.0    +      -       +      +
    135E  GLU*     3.3     4.8    +      -       -      +
    136E  ASP*     3.2    37.8    +      -       -      +
    159K  GLU*     5.8     1.8    +      -       -      -
    160K  ALA*     5.8     6.1    -      -       -      +
    191K  ARG*     4.3    17.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 133 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    129E  ILE*     2.9    28.6    +      -       +      +
    130E  ALA*     4.0     2.2    -      -       -      +
    132E  ARG*     1.3    81.5    -      -       +      +
    134E  ASP*     1.3    68.8    +      -       -      +
    136E  ASP*     3.0     9.0    +      -       +      +
    137E  GLU*     2.9    43.2    +      -       +      +
    142E  LYS      5.3     0.2    -      -       -      +
    144E  GLN*     4.1    24.0    -      -       +      +
    145E  ALA*     4.1    11.4    -      -       +      +
    148E  TRP*     5.1     8.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 134 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    130E  ALA      2.9    19.8    +      -       -      +
    131E  LEU*     3.7     4.3    -      -       -      +
    133E  ILE*     1.3    80.0    -      -       -      +
    135E  GLU*     1.3    58.4    +      -       +      +
    136E  ASP      3.2     0.3    +      -       -      -
    137E  GLU      3.5     2.9    +      -       -      -
    142E  LYS*     2.5    48.6    +      -       -      +
    145E  ALA*     3.9     9.0    -      -       +      +
    149E  TYR*     2.6    25.6    +      -       -      +
    191E  ARG*     2.8    40.6    +      -       -      -
    195E  LEU*     4.2     8.7    -      -       -      -
    194K  ARG*     3.5     9.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 135 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    131E  LEU*     2.9    31.0    +      -       -      +
    132E  ARG*     3.7     6.2    -      -       -      +
    134E  ASP*     1.3    74.7    -      -       -      +
    136E  ASP*     1.3    64.7    +      -       -      +
    137E  GLU      4.2     2.3    -      -       -      +
    142E  LYS*     4.6     1.2    +      -       -      -
    191K  ARG*     3.4    48.5    +      -       -      +
    194K  ARG*     3.2    42.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 136 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132E  ARG*     3.2    29.7    +      -       -      +
    133E  ILE*     3.0    13.4    +      -       +      +
    135E  GLU*     1.3    81.2    -      -       -      +
    137E  GLU*     1.3    74.8    +      -       +      +
    138E  LYS*     3.7     3.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 137 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133E  ILE*     2.9    33.6    +      -       +      +
    134E  ASP      3.5     0.2    +      -       -      -
    135E  GLU      4.2     1.4    -      -       -      +
    136E  ASP*     1.3    86.7    -      -       +      +
    138E  LYS*     1.3    71.8    +      -       -      +
    141E  GLN*     3.3    43.2    -      -       -      +
    142E  LYS*     3.1    21.5    +      -       +      +
    144E  GLN*     2.6    24.0    -      -       -      +
----------------------------------------------------------
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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