Contacts of the helix formed by residues 134 - 157 (chain U) in PDB entry 5XS0


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 U).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    103U  PHE*     4.0     0.7    -      -       -      -
    132U  LEU*     3.4     0.5    -      -       -      +
    133U  LYS*     1.3    71.9    -      -       -      +
    135U  LYS*     1.3    63.5    +      -       -      +
    136U  ALA*     3.6     4.0    +      -       -      +
    137U  LEU*     3.2    39.7    +      -       -      +
    138U  SER*     2.9    27.4    +      -       -      -
    130V  GLU*     4.0    18.7    +      -       -      -
      8X    C      2.7    21.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 135 (chain U). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     96U  VAL*     4.2    16.2    -      -       +      -
    103U  PHE*     3.6    50.3    -      -       +      -
    133U  LYS      3.6     1.2    +      -       -      -
    134U  SER*     1.3    71.4    -      -       -      +
    136U  ALA*     1.3    58.0    +      -       -      +
    138U  SER*     3.2     4.6    +      -       -      -
    139U  LEU*     2.9    37.6    +      -       +      +
     95V  PHE*     3.5    37.9    -      -       +      +
     97V  ASP*     3.0    34.6    +      -       -      -
    130V  GLU*     5.7     0.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 136 (chain U). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    134U  SER*     3.3     6.6    +      -       -      +
    135U  LYS*     1.3    80.4    -      -       -      +
    137U  LEU*     1.3    58.1    +      -       +      +
    139U  LEU      3.4     0.2    +      -       -      -
    140U  GLU*     2.9    26.6    +      -       -      +
     95V  PHE*     3.5    26.9    -      -       +      -
    105V  VAL      4.8     0.7    -      -       -      +
    106V  GLY*     4.7     1.6    -      -       -      -
    126V  TYR*     3.4    13.8    -      -       +      -
    128V  VAL*     3.6    37.9    -      -       +      -
    130V  GLU*     4.8     5.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 137 (chain U). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132U  LEU*     4.7    12.1    -      -       +      +
    134U  SER*     3.2    22.7    +      -       -      +
    136U  ALA*     1.3    81.8    -      -       +      +
    138U  SER*     1.3    60.8    +      -       -      +
    140U  GLU*     3.8    17.9    -      -       -      +
    141U  LYS*     2.9    32.1    +      -       -      +
    128V  VAL*     4.8     8.3    -      -       +      -
    130V  GLU*     4.7     9.2    -      -       -      +
      8X    C      3.4    46.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 138 (chain U). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    103U  PHE*     3.9    12.6    +      -       -      +
    105U  VAL*     4.0    20.4    -      -       -      -
    129U  SER*     3.3    28.2    +      -       -      -
    132U  LEU*     3.4    16.6    -      -       -      +
    134U  SER      2.9    21.3    +      -       -      -
    135U  LYS*     3.5     7.2    -      -       -      -
    137U  LEU*     1.3    77.5    -      -       -      +
    139U  LEU*     1.3    57.3    +      -       -      +
    142U  ALA*     2.9    31.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 139 (chain U). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     93U  VAL*     4.5     9.2    -      -       +      -
     96U  VAL*     4.0    25.4    -      -       +      -
    105U  VAL*     4.0    13.0    -      -       +      -
    107U  VAL*     4.9     1.3    -      -       +      -
    135U  LYS*     2.9    21.9    +      -       +      +
    136U  ALA      3.8     0.2    -      -       -      +
    138U  SER*     1.3    75.6    -      -       -      +
    140U  GLU*     1.3    64.5    +      -       -      +
    142U  ALA*     3.9     2.4    -      -       -      +
    143U  ARG*     2.9    41.6    +      -       +      +
     94V  ASP*     3.6    19.7    -      -       +      +
     95V  PHE*     3.6    28.0    -      -       +      -
    126V  TYR*     3.3    27.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 140 (chain U). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    136U  ALA      2.9    16.2    +      -       -      +
    137U  LEU*     3.8    21.1    -      -       -      +
    139U  LEU*     1.3    74.6    -      -       -      +
    141U  LYS*     1.3    66.0    +      -       -      +
    143U  ARG*     4.0     0.8    -      -       -      -
    144U  LYS*     2.7    65.5    +      -       +      +
    126V  TYR*     3.6    34.3    -      -       +      +
    128V  VAL*     4.5     8.5    -      -       -      +
    149V  ASP*     4.5     0.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 141 (chain U). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128U  VAL      3.3    22.8    +      -       -      +
    129U  SER*     3.9    17.2    -      -       -      +
    130U  GLU      5.3     0.8    -      -       -      +
    132U  LEU*     4.7    11.5    -      -       +      +
    137U  LEU      2.9    18.5    +      -       -      +
    138U  SER      3.8     2.9    -      -       -      +
    140U  GLU*     1.3    77.6    -      -       -      +
    142U  ALA*     1.3    57.3    +      -       -      +
    144U  LYS*     4.2     2.8    -      -       -      +
    145U  GLU*     2.9    63.5    +      -       +      +
      7X    C      5.2     8.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 142 (chain U). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    105U  VAL*     3.8    16.4    -      -       +      +
    107U  VAL*     3.7    23.3    -      -       +      +
    127U  GLY*     3.4    26.5    -      -       -      +
    128U  VAL      4.3     6.3    -      -       -      +
    138U  SER      2.9    17.4    +      -       -      +
    139U  LEU      3.9     1.8    -      -       -      +
    140U  GLU      3.3     0.2    -      -       -      -
    141U  LYS*     1.3    77.3    -      -       -      +
    143U  ARG*     1.3    57.8    +      -       -      +
    146U  ALA*     2.9    31.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 143 (chain U). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91U  GLN*     2.7    54.4    +      -       -      +
     93U  VAL*     3.4    30.1    -      -       +      +
    107U  VAL*     4.0    12.3    -      -       +      -
    139U  LEU*     2.9    25.4    +      -       -      +
    140U  GLU*     4.0     3.1    -      -       -      +
    142U  ALA*     1.3    75.4    -      -       -      +
    144U  LYS*     1.3    63.7    +      -       +      +
    146U  ALA      3.2     1.4    +      -       -      -
    147U  VAL*     3.0    22.2    +      -       -      +
     92V  ASN*     4.6     7.5    -      -       -      +
     94V  ASP*     2.7    37.4    +      -       -      -
    108V  CYS*     3.5    38.0    -      -       -      +
    110V  PHE*     4.2     6.5    -      -       -      -
    124V  VAL*     4.4    10.3    -      -       +      -
    126V  TYR*     4.1     5.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 144 (chain U). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    140U  GLU*     2.7    56.0    +      -       +      +
    141U  LYS*     4.2     2.9    -      -       -      +
    143U  ARG*     1.3    76.3    -      -       +      +
    145U  GLU*     1.3    59.2    +      -       +      +
    147U  VAL*     3.3     2.8    +      -       -      -
    148U  THR*     2.9    33.4    +      -       -      -
    124V  VAL*     4.1     9.9    -      -       +      +
    125V  GLY*     4.5     0.2    -      -       -      -
    126V  TYR*     4.0    10.5    -      -       +      +
    149V  ASP*     2.7    33.6    +      -       -      -
    153V  ARG*     3.5    45.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 145 (chain U). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    126U  TYR      3.9     3.1    -      -       -      +
    127U  GLY*     4.0     6.6    -      -       -      -
    128U  VAL*     3.6    20.6    +      -       -      +
    141U  LYS*     2.9    54.0    +      -       +      +
    142U  ALA      3.9     2.2    -      -       -      +
    144U  LYS*     1.3    75.2    -      -       +      +
    146U  ALA*     1.3    59.3    +      -       -      +
    148U  THR*     4.0     4.9    -      -       -      +
    149U  ASP*     2.8    34.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 146 (chain U). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91U  GLN*     4.0     0.2    -      -       -      +
    107U  VAL*     3.3    32.5    -      -       +      +
    109U  ALA*     3.7    20.7    -      -       +      +
    125U  GLY*     3.5     9.0    -      -       -      -
    126U  TYR      3.5    13.2    -      -       -      -
    127U  GLY*     3.6     1.1    -      -       -      +
    142U  ALA      2.9    20.2    +      -       -      +
    143U  ARG      3.5     4.7    -      -       -      +
    145U  GLU*     1.3    75.9    -      -       -      +
    147U  VAL*     1.3    58.1    +      -       -      +
    150U  GLY*     2.9    24.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 147 (chain U). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     86U  HIS*     5.3     3.1    -      -       +      +
     88U  ILE*     3.8    22.7    -      -       +      -
     91U  GLN*     3.5    16.8    -      -       -      +
    109U  ALA*     3.9    11.0    -      -       +      -
    111U  VAL*     3.6     7.8    -      -       +      +
    143U  ARG      3.0    10.9    +      -       -      +
    144U  LYS*     3.8     5.4    -      -       -      +
    146U  ALA*     1.3    77.3    -      -       -      +
    148U  THR*     1.3    59.4    +      -       -      +
    150U  GLY      3.2     1.0    +      -       -      -
    151U  LEU*     2.9    27.8    +      -       +      +
    122V  GLU      4.8     0.2    -      -       -      +
    123V  ASP*     3.2    29.4    -      -       -      +
    124V  VAL*     3.4    29.8    -      -       +      -
    153V  ARG*     4.8     4.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 148 (chain U). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     68U  GLY*     4.4    22.9    -      -       -      -
     72U  ILE*     6.6     0.2    -      -       +      -
    144U  LYS      2.9    19.0    +      -       -      -
    145U  GLU*     4.0     5.4    -      -       -      -
    147U  VAL*     1.3    77.5    -      -       -      +
    149U  ASP*     1.3    58.1    +      -       -      +
    151U  LEU*     3.2    10.9    +      -       +      +
    152U  LYS*     2.9    37.9    +      -       +      +
    123V  ASP*     5.7     0.2    +      -       -      -
    153V  ARG*     3.9    14.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 149 (chain U). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    144T  LYS*     2.6    37.0    +      -       -      -
     55U  ARG*     5.8     2.1    +      -       -      -
    125U  GLY*     4.0     0.4    -      -       -      -
    126U  TYR      3.3    19.6    +      -       -      +
    145U  GLU      2.8    18.6    +      -       -      +
    146U  ALA      3.8     1.3    -      -       -      +
    148U  THR*     1.3    76.8    -      -       -      +
    150U  GLY*     1.3    58.8    +      -       -      +
    152U  LYS*     3.3    19.1    +      -       -      +
    153U  ARG*     2.9    39.5    +      -       -      +
    156U  ARG*     4.8     3.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 150 (chain U). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    111U  VAL*     3.8    16.3    -      -       -      +
    123U  ASP*     4.5     3.4    -      -       -      +
    124U  VAL      4.0     3.8    -      -       -      -
    125U  GLY*     3.4    24.6    -      -       -      -
    146U  ALA      2.9    13.2    +      -       -      -
    147U  VAL      3.2     4.0    +      -       -      -
    149U  ASP*     1.3    76.3    -      -       -      +
    151U  LEU*     1.3    57.6    +      -       -      +
    153U  ARG*     3.4     1.3    +      -       -      +
    154U  ALA*     2.9    31.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 151 (chain U). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     71U  VAL*     5.7     1.8    -      -       +      -
     72U  ILE*     4.2    28.5    -      -       +      -
     84U  TRP*     3.8    19.3    -      -       +      -
     86U  HIS*     3.7    34.3    -      -       +      +
    111U  VAL*     3.8    10.4    -      -       +      +
    113U  VAL*     3.7    24.2    -      -       +      -
    147U  VAL*     2.9    14.4    +      -       +      +
    148U  THR*     3.5    13.9    -      -       +      +
    150U  GLY*     1.3    77.2    -      -       -      +
    152U  LYS*     1.3    63.6    +      -       +      +
    154U  ALA*     3.3     1.1    +      -       -      +
    155U  LEU*     2.9    30.2    +      -       +      +
    123V  ASP*     5.5     2.9    -      -       -      +
    157V  SER*     5.1     1.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 152 (chain U). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     55U  ARG*     5.3     5.9    -      -       -      +
     65U  TYR*     4.2    17.6    -      -       -      +
     66U  ILE*     3.2    29.4    +      -       +      +
     68U  GLY*     4.3    12.9    -      -       -      +
     71U  VAL*     3.9    31.4    -      -       +      +
    148U  THR*     2.9    29.5    +      -       +      +
    149U  ASP*     3.3    22.7    +      -       -      +
    151U  LEU*     1.3    77.8    -      -       +      +
    153U  ARG*     1.3    57.9    +      -       +      +
    155U  LEU*     3.3     2.4    +      -       -      +
    156U  ARG*     2.9    36.6    +      -       -      +
    162U  LEU      4.8     1.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 153 (chain U). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    144T  LYS*     3.4    64.6    +      -       -      +
    148T  THR*     4.0    11.7    +      -       -      -
    123U  ASP*     3.0    38.4    +      -       +      +
    124U  VAL      2.7    25.6    +      -       -      +
    149U  ASP*     2.9    27.5    +      -       -      +
    150U  GLY      4.0     2.7    -      -       -      +
    152U  LYS*     1.3    76.2    -      -       +      +
    154U  ALA*     1.3    62.6    +      -       -      +
    156U  ARG*     3.2    59.5    +      -       -      +
    157U  SER*     3.8     5.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 154 (chain U). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    111U  VAL      3.8    14.6    -      -       -      +
    113U  VAL*     3.7    17.9    -      -       +      -
    121U  HIS*     3.6    39.9    -      -       -      +
    122U  GLU      4.9     0.2    -      -       -      -
    123U  ASP*     3.7    11.4    -      -       -      +
    150U  GLY      2.9    19.6    +      -       -      +
    151U  LEU*     3.8     1.6    -      -       -      +
    153U  ARG*     1.3    77.0    -      -       -      +
    155U  LEU*     1.3    62.5    +      -       -      +
    157U  SER*     3.4    10.7    +      -       -      -
    158U  PHE*     4.4     2.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 155 (chain U). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     71U  VAL*     3.7    29.4    -      -       +      +
     72U  ILE      5.3     0.4    -      -       -      +
     75U  ALA*     3.9    16.8    -      -       +      -
     79U  PHE*     4.9     3.1    -      -       +      -
     84U  TRP*     3.9    26.5    -      -       +      -
    113U  VAL*     3.7    27.4    -      -       +      -
    151U  LEU*     2.9    30.8    +      -       +      +
    152U  LYS      3.9     3.1    -      -       -      +
    154U  ALA*     1.3    72.5    -      -       -      +
    156U  ARG*     1.3    65.6    +      -       -      +
    157U  SER      3.1     4.0    +      -       -      -
    158U  PHE*     3.2    27.9    +      -       +      -
    162U  LEU*     3.4    30.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 156 (chain U). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     72T  ILE*     5.2     4.0    -      -       +      -
    144T  LYS*     5.9     0.2    -      -       -      +
    149U  ASP*     4.8     3.8    +      -       -      -
    152U  LYS*     2.9    19.9    +      -       +      +
    153U  ARG*     3.2    60.0    -      -       -      +
    154U  ALA      3.3     0.6    -      -       -      -
    155U  LEU*     1.3    77.0    -      -       -      +
    157U  SER*     1.3    57.5    +      -       -      +
    158U  PHE      3.0     6.3    +      -       -      -
    159U  GLY      3.3    17.3    +      -       -      +
    162U  LEU      3.9     8.9    +      -       -      +
    163U  GLY*     3.4    32.3    -      -       -      +
    164U  ASN*     3.5    15.0    -      -       +      +
    166U  ILE*     4.7     5.7    -      -       -      +
    167U  LEU*     3.6    40.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 157 (chain U). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     72T  ILE*     3.5    29.2    -      -       -      +
     76T  ASN*     3.2    19.9    +      -       -      +
     84T  TRP*     3.8     4.9    -      -       -      -
     86T  HIS*     3.7    15.9    +      -       -      -
    151T  LEU*     4.9     1.4    -      -       -      +
    121U  HIS*     3.6    38.2    +      -       -      -
    123U  ASP*     4.4     4.2    +      -       -      -
    153U  ARG      3.8    10.7    +      -       -      -
    154U  ALA*     3.4     4.7    +      -       -      -
    155U  LEU      3.1     2.0    +      -       -      -
    156U  ARG*     1.3    75.9    -      -       -      +
    158U  PHE*     1.3    56.3    +      -       -      +
    159U  GLY      3.5     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
------------------------------------------------------------
  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