Contacts of the helix formed by residues 134 - 157 (chain S) in PDB entry 1H2I


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 SER 134 (chain S).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    103S  PHE*     3.8     1.8    -      -       -      -
    132S  LEU*     3.3     2.7    -      -       -      +
    133S  LYS*     1.3    78.4    -      -       -      +
    135S  LYS*     1.3    62.6    +      -       -      +
    136S  ALA      3.6     0.3    +      -       -      -
    137S  LEU*     3.1    38.2    +      -       -      +
    138S  SER*     3.0    27.9    +      -       -      -
    130T  GLU*     2.9    25.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 135 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     96S  VAL*     4.4    15.3    -      -       +      -
    103S  PHE*     3.5    48.0    -      -       +      -
    133S  LYS      3.7     0.2    +      -       -      -
    134S  SER*     1.3    72.4    +      -       -      +
    136S  ALA*     1.3    58.7    +      -       -      +
    138S  SER*     3.0     5.0    +      -       -      -
    139S  LEU*     2.8    39.1    +      -       +      +
     95T  PHE*     3.8    36.7    -      -       +      +
     97T  ASP*     2.9    34.1    +      -       -      +
    130T  GLU*     4.9     1.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 136 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    134S  SER*     3.3     0.8    +      -       -      +
    135S  LYS*     1.3    79.8    -      -       -      +
    137S  LEU*     1.3    59.6    +      -       +      +
    139S  LEU*     3.3     1.8    +      -       -      +
    140S  GLU*     2.9    30.8    +      -       -      +
     95T  PHE*     3.6    24.0    -      -       +      -
    105T  VAL      4.7     2.0    -      -       -      +
    126T  TYR*     3.8     8.4    -      -       +      -
    128T  VAL*     3.7    36.6    -      -       +      -
    130T  GLU*     3.8    14.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 137 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132S  LEU*     4.1    17.5    -      -       +      +
    134S  SER*     3.1    30.5    +      -       -      +
    136S  ALA*     1.3    84.3    -      -       +      +
    138S  SER*     1.3    61.2    +      -       -      +
    140S  GLU*     3.6    22.5    +      -       -      +
    141S  LYS*     3.1    23.9    +      -       -      +
    128T  VAL*     5.0     8.1    -      -       +      -
    130T  GLU*     4.0    14.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 138 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    103S  PHE*     3.7    16.6    +      -       -      +
    105S  VAL*     3.8    20.9    -      -       -      -
    129S  SER*     3.3    30.7    +      -       -      -
    132S  LEU*     3.4    15.2    -      -       -      +
    134S  SER      3.0    22.8    +      -       -      -
    135S  LYS      3.0     4.9    +      -       -      -
    137S  LEU*     1.3    74.8    -      -       -      +
    139S  LEU*     1.3    66.8    +      -       -      +
    141S  LYS      3.3     1.4    +      -       -      -
    142S  ALA*     3.0    20.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 139 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     93S  VAL*     4.4    19.5    -      -       +      -
     96S  VAL*     4.0    22.7    -      -       +      -
    105S  VAL*     3.7    24.7    -      -       +      -
    107S  VAL*     4.7     2.7    -      -       +      -
    135S  LYS*     2.8    27.5    +      -       +      +
    136S  ALA      3.7     1.1    -      -       -      +
    138S  SER*     1.3    78.0    -      -       -      +
    140S  GLU*     1.3    64.2    +      -       -      +
    142S  ALA*     3.2     1.6    +      -       -      +
    143S  ARG*     2.9    32.6    +      -       +      +
     94T  ASP*     3.5    20.2    -      -       +      +
     95T  PHE*     4.1    23.6    -      -       +      -
    126T  TYR*     3.4    14.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 140 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    136S  ALA      2.9    17.4    +      -       -      +
    137S  LEU*     3.6    26.6    -      -       -      +
    139S  LEU*     1.3    76.9    -      -       -      +
    141S  LYS*     1.3    65.4    +      -       -      +
    143S  ARG*     4.1     0.6    -      -       -      +
    144S  LYS*     3.0    61.5    +      -       +      +
    126T  TYR*     3.8    35.3    -      -       +      +
    128T  VAL*     5.0     7.5    -      -       +      +
    149T  ASP*     4.4     1.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 141 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128S  VAL*     2.6    27.6    +      -       -      +
    129S  SER*     4.0    13.8    -      -       -      +
    132S  LEU*     5.1     7.6    -      -       +      -
    137S  LEU      3.1    15.7    +      -       -      +
    138S  SER      3.8     3.4    -      -       -      +
    140S  GLU*     1.3    80.8    -      -       -      +
    142S  ALA*     1.3    65.1    +      -       -      +
    144S  LYS*     4.0     2.6    -      -       -      +
    145S  GLU*     3.0    60.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 142 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    105S  VAL*     3.8    16.4    -      -       +      +
    107S  VAL*     3.7    19.0    -      -       +      +
    127S  GLY*     3.3    34.3    -      -       -      +
    128S  VAL      4.1     6.5    -      -       -      +
    129S  SER*     4.5     0.2    -      -       -      -
    138S  SER      3.0    17.1    +      -       -      +
    139S  LEU      3.9     1.3    -      -       -      +
    141S  LYS*     1.3    78.9    -      -       -      +
    143S  ARG*     1.3    61.9    +      -       -      +
    146S  ALA*     3.1    21.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 143 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91S  GLN*     2.9    63.9    +      -       -      +
     93S  VAL*     3.5    27.6    -      -       -      +
    107S  VAL*     4.1    12.6    -      -       +      -
    139S  LEU*     2.9    23.1    +      -       +      +
    140S  GLU*     4.2     2.9    -      -       -      +
    142S  ALA*     1.3    76.7    -      -       -      +
    144S  LYS*     1.3    64.4    +      -       +      +
    147S  VAL*     3.3    13.2    +      -       -      +
     92T  ASN*     5.0     3.2    +      -       -      +
     94T  ASP*     2.7    44.8    +      -       -      -
    108T  CYS*     3.5    24.4    -      -       -      -
    110T  PHE*     4.5     4.6    -      -       -      -
    124T  VAL*     4.3     9.6    -      -       +      -
    126T  TYR*     3.8    22.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 144 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    140S  GLU*     3.0    49.1    +      -       +      +
    141S  LYS*     4.1     3.1    -      -       -      +
    143S  ARG*     1.3    78.3    -      -       +      +
    145S  GLU*     1.3    62.4    +      -       +      +
    147S  VAL*     3.4     4.0    +      -       -      +
    148S  THR*     3.2    24.3    +      -       -      -
    124T  VAL*     4.3     9.0    -      -       +      +
    125T  GLY      4.6     0.2    -      -       -      -
    126T  TYR*     4.1    10.8    -      -       +      +
    149T  ASP*     2.8    34.0    +      -       -      -
    153T  ARG*     3.5    47.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 145 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    126S  TYR      3.9     4.0    -      -       -      +
    127S  GLY*     4.2     7.6    -      -       -      -
    128S  VAL*     3.7    10.9    +      -       -      +
    141S  LYS*     3.0    62.7    +      -       +      +
    144S  LYS*     1.3    73.8    -      -       +      +
    146S  ALA*     1.3    61.4    +      -       -      +
    148S  THR*     4.1     5.6    -      -       -      +
    149S  ASP*     2.8    34.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 146 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    107S  VAL*     3.6    17.5    -      -       +      +
    109S  ALA*     3.7    22.9    -      -       +      +
    125S  GLY*     3.4     8.1    -      -       -      -
    126S  TYR      3.5    12.3    -      -       -      -
    127S  GLY*     3.6    12.3    -      -       -      +
    142S  ALA      3.1    19.8    +      -       -      +
    143S  ARG      3.7     4.5    -      -       -      +
    144S  LYS      3.3     0.4    -      -       -      -
    145S  GLU*     1.3    77.7    -      -       -      +
    147S  VAL*     1.3    52.5    +      -       -      +
    150S  GLY*     2.8    31.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 147 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     86S  HIS*     5.1     6.3    -      -       +      +
     88S  ILE*     3.8    27.4    -      -       +      -
     91S  GLN*     3.5    17.5    -      -       -      +
    109S  ALA*     3.9    11.7    -      -       +      -
    111S  VAL*     3.6     5.9    -      -       +      +
    143S  ARG      3.3     1.0    +      -       -      +
    144S  LYS      3.7     6.7    -      -       -      +
    145S  GLU      3.2     0.4    -      -       -      -
    146S  ALA*     1.3    77.6    -      -       -      +
    148S  THR*     1.3    60.1    +      -       -      +
    150S  GLY*     3.0     2.6    +      -       -      -
    151S  LEU*     2.8    30.0    +      -       +      +
    110T  PHE*     5.1     0.2    -      -       +      -
    122T  GLU      4.6     3.6    -      -       -      +
    123T  ASP*     3.3    28.7    -      -       -      +
    124T  VAL*     3.2    27.8    -      -       +      -
    153T  ARG*     4.9     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 148 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     68S  GLY*     4.1    26.9    -      -       -      +
     72S  ILE*     6.5     0.7    -      -       +      -
    144S  LYS      3.2    15.1    +      -       -      -
    145S  GLU*     4.1     5.2    -      -       -      -
    147S  VAL*     1.3    79.6    -      -       -      +
    149S  ASP*     1.3    64.1    +      -       -      +
    151S  LEU*     3.3    10.2    +      -       +      +
    152S  LYS*     2.9    33.4    +      -       +      +
    123T  ASP*     5.1     2.4    +      -       -      -
    153T  ARG*     3.7    17.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 149 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    140R  GLU*     5.2     0.7    -      -       -      -
    144R  LYS*     2.7    33.7    +      -       -      -
    125S  GLY*     3.3     2.3    -      -       -      -
    126S  TYR      2.9    26.0    +      -       -      +
    145S  GLU*     2.8    24.3    +      -       +      +
    146S  ALA      3.5     3.1    -      -       -      +
    148S  THR*     1.3    74.6    -      -       -      +
    150S  GLY*     1.3    57.9    +      -       -      +
    152S  LYS*     3.4    18.8    +      -       -      +
    153S  ARG*     3.0    38.8    +      -       -      +
    156S  ARG*     5.2     4.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 150 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    111S  VAL*     3.7    16.6    -      -       -      +
    123S  ASP*     4.4     3.1    -      -       -      +
    124S  VAL      4.0     4.3    -      -       -      -
    125S  GLY*     3.3    21.9    -      -       -      -
    146S  ALA      2.8    13.3    +      -       -      -
    147S  VAL      3.5     3.1    -      -       -      -
    149S  ASP*     1.3    74.5    -      -       -      +
    151S  LEU*     1.3    58.8    +      -       -      +
    153S  ARG*     3.1     2.3    +      -       -      +
    154S  ALA*     2.8    31.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 151 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     71S  VAL*     5.5     1.6    -      -       +      -
     72S  ILE*     4.4    20.9    -      -       +      -
     84S  TRP*     3.9    14.8    -      -       +      -
     86S  HIS*     3.8    50.3    -      -       +      +
    111S  VAL*     3.7    14.2    -      -       +      +
    113S  VAL*     4.7     5.4    -      -       +      -
    147S  VAL*     2.8    20.2    +      -       +      +
    148S  THR*     3.6    11.7    -      -       +      +
    150S  GLY*     1.3    72.9    -      -       -      +
    152S  LYS*     1.3    65.6    +      -       +      +
    154S  ALA*     3.3     0.9    +      -       -      +
    155S  LEU*     3.0    48.5    +      -       +      +
    157T  SER*     5.1     0.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 152 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65S  TYR*     4.1    16.6    -      -       -      +
     66S  ILE*     2.7    33.2    +      -       +      +
     67S  GLU*     4.9     0.4    -      -       -      +
     68S  GLY*     4.1    11.8    -      -       -      +
     71S  VAL*     3.9    31.4    -      -       +      -
    148S  THR*     2.9    33.2    +      -       +      +
    149S  ASP*     3.7    19.8    +      -       -      +
    151S  LEU*     1.3    78.1    -      -       +      +
    153S  ARG*     1.3    62.1    +      -       -      +
    155S  LEU*     3.4     6.9    +      -       -      +
    156S  ARG*     3.1    45.7    +      -       -      +
    162S  LEU      4.7     1.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 153 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    144R  LYS*     3.4    57.6    +      -       -      +
    148R  THR*     3.8    17.6    +      -       -      -
    123S  ASP*     2.4    58.8    +      -       +      +
    124S  VAL*     2.9    22.9    +      -       -      +
    149S  ASP*     3.0    24.2    +      -       -      +
    150S  GLY      3.8     2.9    -      -       -      +
    152S  LYS*     1.3    73.2    -      -       +      +
    154S  ALA*     1.3    70.0    +      -       -      +
    156S  ARG*     3.3    42.0    +      -       -      +
    157S  SER*     3.9     4.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 154 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    111S  VAL*     3.8    15.0    -      -       +      +
    113S  VAL*     3.3    26.8    -      -       +      +
    121S  HIS*     3.7    16.4    +      -       -      +
    122S  GLU      4.8     1.1    -      -       -      -
    123S  ASP*     3.7    12.0    -      -       -      +
    150S  GLY      2.8    20.4    +      -       -      +
    151S  LEU*     3.7     6.3    -      -       -      +
    153S  ARG*     1.3    76.4    -      -       -      +
    155S  LEU*     1.3    63.2    +      -       -      +
    157S  SER*     3.1    23.2    +      -       -      -
    158S  PHE*     4.5     0.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 155 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     71S  VAL*     3.9    20.2    -      -       +      +
     72S  ILE*     6.0     0.2    -      -       -      -
     75S  ALA*     4.6     7.6    -      -       +      -
     79S  PHE*     5.0     4.7    -      -       +      -
     84S  TRP*     4.2    15.9    -      -       +      -
    113S  VAL*     3.5    29.8    -      -       +      -
    151S  LEU*     3.0    45.8    +      -       +      +
    152S  LYS      3.7     4.7    -      -       -      +
    154S  ALA*     1.3    76.7    -      -       -      +
    156S  ARG*     1.3    63.3    +      -       -      +
    157S  SER      3.0     1.2    +      -       -      -
    158S  PHE*     3.0    29.0    +      -       +      +
    162S  LEU*     3.5    38.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 156 (chain S). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     72R  ILE*     5.3     3.1    -      -       +      -
     65S  TYR*     6.2     2.0    -      -       -      +
     66S  ILE*     4.9     8.9    -      -       -      +
     71S  VAL*     6.2     1.0    -      -       -      +
    149S  ASP*     5.2     4.6    +      -       -      -
    152S  LYS*     3.1    41.4    +      -       -      +
    153S  ARG*     3.6    34.5    -      -       -      +
    154S  ALA      3.2     0.8    +      -       -      -
    155S  LEU*     1.3    75.4    -      -       -      +
    157S  SER*     1.3    64.0    +      -       -      +
    158S  PHE      3.0     1.4    +      -       -      -
    159S  GLY      3.0    11.8    +      -       -      +
    162S  LEU      3.8    11.7    +      -       -      +
    163S  GLY*     3.7    22.6    +      -       -      +
    164S  ASN*     3.3    29.5    -      -       -      +
    166S  ILE*     3.9    26.0    -      -       -      +
    167S  LEU*     4.2    17.4    -      -       -      +
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Residues in contact with SER 157 (chain S). Click here for Legend to table.
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                                  Specific contacts
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     Residue       Dist    Surf   HB    Arom    Phob    DC
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     72R  ILE*     3.4    23.1    -      -       -      +
     76R  ASN*     2.9    24.8    +      -       -      +
     84R  TRP*     3.9     9.3    -      -       -      -
     86R  HIS*     3.5    18.7    +      -       -      -
    151R  LEU*     5.2     1.0    -      -       -      +
    121S  HIS*     3.4    30.2    -      -       -      -
    123S  ASP*     5.2     2.4    +      -       -      -
    153S  ARG      4.0     5.0    +      -       -      -
    154S  ALA*     3.1    16.4    +      -       -      -
    155S  LEU      3.0     0.8    +      -       -      -
    156S  ARG*     1.3    79.1    -      -       -      +
    158S  PHE*     1.3    56.5    +      -       -      +
    159S  GLY      3.2     0.4    -      -       -      -
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


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

Legend:
+, legitimate
-, illegitimate
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  Atomic class           I  II  III   IV   V   VI  VII  VIII
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   I  (Hydrophilic)      +   +    +    -   +   +    +    +
  II  (Acceptor)         +   -    +    -   +   +    +    -
 III  (Donor)            +   +    -    -   +   +    -    +
  IV  (Hydrophobic)      -   -    -    +   +   +    +    +
   V  (Aromatic)         +   +    +    +   +   +    +    +
  VI  (Neutral)          +   +    +    +   +   +    +    +
 VII  (Neutral-donor)    +   +    -    +   +   +    -    +
VIII  (Neutral-acceptor) +   -    +    +   +   +    +    -
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Warning!
Atom classes for heterogroups are automatically assigned based on the atomic coordinates. However, in three cases (see below) the automatic assignment is currently ambiguous. In these cases, the user is advised to manually analyse the full list of contacts using LPC software.
1. Carbon atoms belonging to a 4-, 5- or 6-member ring are 
   considered "aromatic" (Class V) if the ring is approximately
   planar, and "hydrophobic" (Class IV) or "neutral" (Classes
   VI, VII, VIII) if the ring is non-planar.
2. The oxygen atom of a carbonyl or hydroxy group is considered
   "hydroxy" (Class I) if the CO bond is longer than 1.29 Å, and
   "carbonyl" (Class II) if shorter.
3. All nitrogen atoms are considered "hydrophilic" (Class I).

Please E-mail any questions and/or suggestions concerning this page to Vladimir.Sobolev@weizmann.ac.il