Contacts of the helix formed by residues 134 - 157 (chain R) 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 R).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    103R  PHE*     3.9     0.7    -      -       -      -
    132R  LEU*     3.4     3.2    -      -       -      +
    133R  LYS*     1.3    76.6    -      -       -      +
    135R  LYS*     1.3    63.2    +      -       -      +
    136R  ALA      3.5     1.6    +      -       -      -
    137R  LEU*     3.1    38.1    +      -       -      +
    138R  SER*     2.8    28.5    +      -       -      -
    130S  GLU*     3.5    24.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 135 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     96R  VAL*     4.1    16.4    -      -       +      -
    103R  PHE*     3.5    50.8    -      -       +      -
    105R  VAL*     6.0     0.4    -      -       +      -
    133R  LYS      3.6     0.2    +      -       -      -
    134R  SER*     1.3    72.3    +      -       -      +
    136R  ALA*     1.3    57.2    +      -       -      +
    138R  SER*     3.3     3.4    +      -       -      -
    139R  LEU*     2.9    38.5    +      -       +      +
     95S  PHE*     3.5    37.1    -      -       +      +
     97S  ASP*     2.8    34.2    +      -       -      -
    130S  GLU*     5.6     0.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 136 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    134R  SER*     3.3     6.1    +      -       -      +
    135R  LYS*     1.3    80.7    -      -       -      +
    137R  LEU*     1.3    57.3    +      -       -      +
    140R  GLU*     2.9    26.2    +      -       -      +
     95S  PHE*     3.5    25.5    -      -       +      -
    105S  VAL      4.5     3.4    -      -       -      +
    126S  TYR*     3.3    15.6    -      -       +      -
    128S  VAL*     3.6    36.1    -      -       +      -
    130S  GLU*     4.2     6.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 137 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132R  LEU*     4.5    15.3    -      -       +      +
    134R  SER*     3.1    30.0    +      -       -      +
    136R  ALA*     1.3    75.4    -      -       -      +
    138R  SER*     1.3    62.0    +      -       -      +
    140R  GLU*     3.7    17.7    -      -       -      +
    141R  LYS*     2.9    32.1    +      -       -      +
    128S  VAL*     4.7    11.7    -      -       +      -
    130S  GLU*     4.2    11.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 138 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    103R  PHE*     3.8    14.2    +      -       -      +
    105R  VAL*     4.0    17.7    -      -       -      -
    129R  SER*     3.2    29.7    +      -       -      -
    132R  LEU*     3.2    23.6    -      -       -      +
    134R  SER      2.8    22.0    +      -       -      -
    135R  LYS      3.6     4.5    -      -       -      -
    137R  LEU*     1.3    78.4    -      -       -      +
    139R  LEU*     1.3    56.5    +      -       -      +
    141R  LYS      3.3     0.2    +      -       -      -
    142R  ALA*     2.9    26.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 139 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     93R  VAL*     4.5     8.7    -      -       +      -
     96R  VAL*     4.0    18.4    -      -       +      -
    105R  VAL*     3.9    23.3    -      -       +      -
    107R  VAL*     4.9     1.8    -      -       +      -
    135R  LYS*     2.9    23.3    +      -       +      +
    138R  SER*     1.3    76.4    -      -       -      +
    140R  GLU*     1.3    58.4    +      -       -      +
    142R  ALA*     3.3     2.8    +      -       -      -
    143R  ARG*     2.9    47.2    +      -       +      +
     94S  ASP*     3.5    21.1    -      -       +      +
     95S  PHE*     3.6    24.0    -      -       +      -
    126S  TYR*     3.3    28.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 140 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    136R  ALA      2.9    17.1    +      -       -      +
    137R  LEU*     3.7    23.3    -      -       -      +
    139R  LEU*     1.3    76.5    -      -       -      +
    141R  LYS*     1.3    64.4    +      -       -      +
    143R  ARG*     4.0     1.4    -      -       -      +
    144R  LYS*     2.8    65.4    +      -       +      +
    126S  TYR*     3.6    32.4    -      -       +      +
    128S  VAL*     4.5     8.1    -      -       -      +
    149S  ASP*     4.2     0.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 141 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128R  VAL*     2.8    24.9    +      -       -      +
    129R  SER*     3.6    16.5    -      -       -      +
    132R  LEU*     4.7    11.2    -      -       +      -
    137R  LEU      2.9    17.9    +      -       -      +
    138R  SER      3.6     3.1    -      -       -      +
    140R  GLU*     1.3    78.1    -      -       -      +
    142R  ALA*     1.3    58.3    +      -       -      +
    144R  LYS*     4.2     2.6    -      -       -      +
    145R  GLU*     2.5    70.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 142 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    105R  VAL*     3.7    16.4    -      -       +      +
    107R  VAL*     3.7    19.3    -      -       +      -
    127R  GLY*     3.1    34.5    -      -       -      +
    128R  VAL      4.0     6.3    -      -       -      +
    129R  SER*     4.5     0.2    -      -       -      -
    138R  SER      2.9    17.2    +      -       -      +
    139R  LEU      3.9     1.8    -      -       -      +
    140R  GLU      3.3     0.2    -      -       -      -
    141R  LYS*     1.3    77.4    -      -       -      +
    143R  ARG*     1.3    57.7    +      -       -      +
    146R  ALA*     2.9    27.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 143 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91R  GLN*     2.5    57.1    +      -       -      +
     93R  VAL*     3.3    30.9    -      -       -      +
    107R  VAL*     4.0    13.5    -      -       +      -
    139R  LEU*     2.9    25.9    +      -       +      +
    140R  GLU*     4.0     2.9    -      -       -      +
    142R  ALA*     1.3    76.4    -      -       -      +
    144R  LYS*     1.3    62.7    +      -       -      +
    146R  ALA      3.2     1.6    +      -       -      -
    147R  VAL*     3.0    21.0    +      -       -      +
     92S  ASN*     4.9     5.5    -      -       -      +
     94S  ASP*     2.8    33.1    +      -       -      -
    108S  CYS*     3.5    37.3    -      -       -      -
    110S  PHE*     4.4     4.9    -      -       -      -
    124S  VAL*     4.1    11.4    -      -       +      -
    126S  TYR*     4.0     9.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 144 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    140R  GLU*     2.8    50.0    +      -       +      +
    141R  LYS*     4.2     2.5    -      -       -      +
    143R  ARG*     1.3    75.4    -      -       -      +
    145R  GLU*     1.3    65.2    +      -       -      +
    147R  VAL*     3.3     3.6    +      -       -      -
    148R  THR*     3.0    28.6    +      -       -      -
    124S  VAL*     4.1    15.5    -      -       +      +
    126S  TYR*     4.1     7.0    -      -       +      +
    149S  ASP*     2.6    36.3    +      -       -      -
    153S  ARG*     3.4    46.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 145 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    126R  TYR      3.7     3.1    -      -       -      +
    127R  GLY*     3.9     6.6    -      -       -      -
    128R  VAL*     3.4    15.1    +      -       -      +
    141R  LYS*     2.5    64.1    +      -       +      +
    142R  ALA      3.9     2.5    -      -       -      +
    144R  LYS*     1.3    77.0    -      -       +      +
    146R  ALA*     1.3    56.4    +      -       -      +
    148R  THR*     3.8     4.6    -      -       -      +
    149R  ASP*     2.9    34.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 146 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    107R  VAL*     3.4    31.6    -      -       +      +
    109R  ALA*     3.7    21.8    -      -       +      +
    125R  GLY*     3.6     7.8    -      -       -      -
    126R  TYR      3.3    14.3    +      -       -      -
    127R  GLY      3.5     0.4    -      -       -      +
    142R  ALA      2.9    19.1    +      -       -      +
    143R  ARG      3.2     5.4    +      -       -      +
    145R  GLU*     1.3    76.1    -      -       -      +
    147R  VAL*     1.3    57.7    +      -       -      +
    149R  ASP      3.5     0.2    +      -       -      -
    150R  GLY      2.9    24.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 147 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     86R  HIS*     5.4     4.3    -      -       +      +
     88R  ILE*     3.7    24.2    -      -       +      -
     91R  GLN*     3.4    24.9    -      -       -      +
    109R  ALA*     4.0    11.0    -      -       +      -
    111R  VAL*     3.5     9.0    -      -       +      +
    143R  ARG      3.0    12.0    +      -       -      +
    144R  LYS      3.3     4.0    +      -       -      +
    146R  ALA*     1.3    75.0    -      -       -      +
    148R  THR*     1.3    64.7    +      -       -      +
    150R  GLY      3.3     1.0    +      -       -      -
    151R  LEU*     2.9    22.1    +      -       +      +
    122S  GLU      4.8     2.5    -      -       -      +
    123S  ASP*     3.4    33.0    -      -       -      +
    124S  VAL*     3.7    20.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 148 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     68R  GLY*     4.4    23.1    -      -       -      +
    144R  LYS      3.0    17.2    +      -       -      -
    145R  GLU*     4.0     4.9    -      -       -      -
    147R  VAL*     1.3    78.2    -      -       -      +
    149R  ASP*     1.3    57.9    +      -       -      +
    151R  LEU*     3.2    12.0    +      -       +      +
    152R  LYS*     2.9    39.6    +      -       +      +
    123S  ASP*     5.0     3.7    +      -       -      -
    153S  ARG*     3.7    14.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 149 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    140Q  GLU*     4.3     0.7    -      -       -      +
    144Q  LYS*     2.6    39.3    +      -       -      -
    125R  GLY*     3.9     1.1    -      -       -      -
    126R  TYR      3.2    21.5    +      -       -      +
    145R  GLU      2.9    19.5    +      -       -      +
    146R  ALA      3.8     2.0    -      -       -      +
    148R  THR*     1.3    76.8    -      -       -      +
    150R  GLY*     1.3    57.8    +      -       -      +
    152R  LYS*     3.3    20.6    +      -       -      +
    153R  ARG*     2.9    35.3    +      -       -      +
    156R  ARG*     5.2     3.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 150 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    111R  VAL*     3.6    17.7    -      -       -      +
    123R  ASP*     4.6     2.5    -      -       -      +
    124R  VAL      4.0     4.0    -      -       -      -
    125R  GLY*     3.4    23.3    -      -       -      -
    146R  ALA      2.9    13.8    +      -       -      -
    147R  VAL      3.7     3.1    -      -       -      -
    149R  ASP*     1.3    75.2    -      -       -      +
    151R  LEU*     1.3    57.2    +      -       -      +
    153R  ARG*     3.8     1.1    -      -       -      +
    154R  ALA*     2.9    31.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 151 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     71R  VAL*     6.0     0.7    -      -       +      -
     72R  ILE*     4.5    21.3    -      -       +      -
     84R  TRP*     3.7    36.3    -      -       +      -
     86R  HIS*     3.7    30.1    -      -       +      +
    111R  VAL*     3.6    10.4    -      -       +      +
    113R  VAL*     3.7    15.9    -      -       +      -
    147R  VAL*     2.9    15.1    +      -       +      +
    148R  THR*     3.2    14.1    +      -       +      +
    150R  GLY*     1.3    77.2    -      -       -      +
    152R  LYS*     1.3    64.3    +      -       +      +
    154R  ALA*     3.3     0.9    +      -       -      +
    155R  LEU*     3.0    30.7    +      -       +      +
    123S  ASP*     5.4     4.5    -      -       -      +
    157S  SER*     4.8     1.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 152 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65R  TYR*     4.8    14.1    -      -       -      +
     66R  ILE*     3.4    28.6    +      -       +      +
     67R  GLU*     5.3     0.2    -      -       -      +
     68R  GLY*     4.5    11.7    -      -       -      +
     71R  VAL*     4.1    30.7    -      -       +      -
    148R  THR*     2.9    29.0    +      -       +      +
    149R  ASP*     3.7    24.4    +      -       -      +
    151R  LEU*     1.3    77.3    -      -       +      +
    153R  ARG*     1.3    58.6    +      -       +      +
    155R  LEU*     3.3     2.8    +      -       -      +
    156R  ARG*     2.9    41.3    +      -       -      +
    162R  LEU      4.9     1.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 153 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    144Q  LYS*     3.5    65.6    +      -       -      +
    147Q  VAL*     4.7     0.4    -      -       -      +
    148Q  THR*     3.8    12.7    +      -       -      -
    123R  ASP*     2.9    43.1    +      -       +      +
    124R  VAL      2.7    25.0    +      -       -      +
    149R  ASP*     2.9    26.4    +      -       -      +
    150R  GLY      4.0     1.6    -      -       -      +
    152R  LYS*     1.3    76.7    -      -       +      +
    154R  ALA*     1.3    61.7    +      -       -      +
    156R  ARG*     3.5    51.4    -      -       -      +
    157R  SER*     3.9     5.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 154 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    111R  VAL      3.7    15.0    -      -       -      +
    113R  VAL*     3.6    18.2    -      -       +      -
    121R  HIS*     3.5    40.7    -      -       -      +
    123R  ASP*     3.8    10.5    -      -       -      +
    150R  GLY      2.9    18.7    +      -       -      +
    151R  LEU*     3.8     0.7    -      -       -      +
    153R  ARG*     1.3    77.7    -      -       -      +
    155R  LEU*     1.3    63.3    +      -       -      +
    157R  SER*     3.4    10.4    +      -       -      -
    158R  PHE*     4.3     2.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 155 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     71R  VAL*     3.6    31.9    -      -       +      +
     72R  ILE*     5.5     0.2    -      -       -      -
     75R  ALA*     4.0    20.2    -      -       +      -
     79R  PHE*     4.9     2.5    -      -       +      -
     84R  TRP*     4.1    13.2    -      -       +      -
    113R  VAL*     3.6    31.0    -      -       +      -
    151R  LEU*     3.0    33.6    +      -       +      +
    152R  LYS      3.8     3.6    -      -       -      +
    154R  ALA*     1.3    74.3    -      -       -      +
    156R  ARG*     1.3    66.7    +      -       -      +
    157R  SER      3.1     1.1    +      -       -      -
    158R  PHE*     3.2    26.1    +      -       +      -
    162R  LEU*     3.5    33.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 156 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     72Q  ILE*     4.8     5.6    -      -       +      -
    149R  ASP*     5.2     4.4    +      -       -      -
    152R  LYS*     2.9    27.8    +      -       +      +
    153R  ARG*     3.5    48.7    -      -       -      +
    154R  ALA      3.2     0.4    -      -       -      -
    155R  LEU*     1.3    76.7    -      -       -      +
    157R  SER*     1.3    56.1    +      -       -      +
    158R  PHE      3.0     6.5    +      -       -      -
    159R  GLY      3.4    16.3    +      -       -      +
    162R  LEU      4.2     7.2    +      -       -      +
    163R  GLY*     3.7    29.4    +      -       -      +
    164R  ASN*     3.6    18.1    -      -       +      +
    166R  ILE*     4.3    10.3    -      -       -      +
    167R  LEU*     3.9    37.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 157 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     72Q  ILE*     3.5    28.5    -      -       -      +
     76Q  ASN*     3.3    16.3    +      -       -      +
     84Q  TRP*     3.8     5.4    -      -       -      -
     86Q  HIS*     3.8    16.0    +      -       -      -
    151Q  LEU*     4.8     2.3    -      -       -      +
    121R  HIS*     3.5    41.9    +      -       -      -
    123R  ASP*     4.6     4.2    +      -       -      -
    153R  ARG      3.9     7.8    +      -       -      -
    154R  ALA*     3.4     6.9    +      -       -      -
    155R  LEU      3.1     2.4    +      -       -      -
    156R  ARG*     1.3    75.6    -      -       -      +
    158R  PHE*     1.3    56.2    -      -       -      +
    159R  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