Contacts of the helix formed by residues 134 - 157 (chain B) 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 B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    103B  PHE*     3.9     1.6    -      -       -      -
    132B  LEU*     3.4     3.1    -      -       -      +
    133B  LYS*     1.3    76.8    -      -       -      +
    135B  LYS*     1.3    61.4    +      -       -      +
    136B  ALA      3.6     0.3    +      -       -      -
    137B  LEU*     3.1    38.5    +      -       -      +
    138B  SER*     2.8    28.2    +      -       -      -
    130C  GLU*     3.0    35.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 135 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     96B  VAL*     4.4    17.8    -      -       +      +
    103B  PHE*     3.5    48.5    -      -       +      -
    105B  VAL*     5.4     0.3    -      -       -      +
    134B  SER*     1.3    71.6    -      -       -      +
    136B  ALA*     1.3    63.6    +      -       -      +
    138B  SER*     3.4     3.4    +      -       -      -
    139B  LEU*     3.0    31.7    +      -       +      +
     95C  PHE*     3.6    43.9    -      -       +      +
     97C  ASP*     3.2    27.8    +      -       -      +
    130C  GLU*     4.6     2.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 136 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    134B  SER*     3.3     4.1    +      -       -      +
    135B  LYS*     1.3    80.6    -      -       -      +
    137B  LEU*     1.3    59.7    +      -       -      +
    139B  LEU      3.3     0.7    +      -       -      -
    140B  GLU*     2.9    25.6    +      -       -      +
     95C  PHE*     3.3    25.7    -      -       +      -
    105C  VAL      4.0     8.7    -      -       -      +
    106C  GLY*     4.2     3.1    -      -       -      -
    126C  TYR*     3.2    12.5    -      -       -      -
    128C  VAL*     3.6    33.4    -      -       +      -
    130C  GLU*     4.4     5.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 137 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132B  LEU*     4.2    18.2    -      -       +      +
    134B  SER*     3.1    32.4    +      -       -      +
    136B  ALA*     1.3    73.6    -      -       -      +
    138B  SER*     1.3    65.5    +      -       -      +
    140B  GLU*     3.3    15.3    +      -       -      +
    141B  LYS*     2.9    25.8    +      -       -      +
     58C  GLY*     6.1     5.8    -      -       -      +
    128C  VAL*     3.7    30.1    -      -       +      -
    130C  GLU*     4.1     5.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 138 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    103B  PHE*     3.7    14.7    +      -       -      +
    105B  VAL*     4.1    17.7    -      -       -      -
    129B  SER*     3.3    25.8    +      -       -      -
    132B  LEU*     3.2    22.1    -      -       -      +
    134B  SER      2.8    21.5    +      -       -      -
    135B  LYS      3.5     4.9    -      -       -      -
    137B  LEU*     1.3    78.0    -      -       -      +
    139B  LEU*     1.3    61.1    +      -       -      +
    141B  LYS      3.4     0.2    +      -       -      -
    142B  ALA*     2.9    26.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 139 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     93B  VAL*     4.3    13.0    -      -       +      -
     96B  VAL*     4.1    18.8    -      -       +      -
    105B  VAL*     3.8    25.8    -      -       +      -
    107B  VAL*     4.7     1.8    -      -       +      -
    135B  LYS*     3.0    20.3    +      -       +      +
    136B  ALA      3.7     0.2    -      -       -      +
    138B  SER*     1.3    76.5    -      -       -      +
    140B  GLU*     1.3    61.3    +      -       -      +
    142B  ALA*     3.3     2.8    +      -       -      +
    143B  ARG*     2.9    39.8    +      -       +      +
     94C  ASP*     3.7    15.9    -      -       +      +
     95C  PHE*     3.6    28.5    -      -       +      -
    126C  TYR*     3.2    31.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 140 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    136B  ALA      2.9    11.1    +      -       -      +
    137B  LEU*     3.6    16.6    -      -       -      +
    138B  SER      3.3     0.2    -      -       -      -
    139B  LEU*     1.3    76.4    -      -       -      +
    141B  LYS*     1.3    64.1    +      -       -      +
    143B  ARG*     4.0     0.8    -      -       -      +
    144B  LYS*     2.6    66.2    +      -       +      +
    126C  TYR*     3.5    36.9    -      -       +      +
    128C  VAL*     4.2    14.1    -      -       -      +
    149C  ASP*     4.5     0.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 141 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128B  VAL*     2.8    30.5    +      -       -      +
    129B  SER*     3.7    16.9    -      -       -      +
    130B  GLU      5.3     0.6    -      -       -      +
    132B  LEU*     5.2     6.1    -      -       +      -
    137B  LEU      2.9    17.9    +      -       -      +
    138B  SER      3.8     3.1    -      -       -      +
    140B  GLU*     1.3    78.8    -      -       +      +
    142B  ALA*     1.3    57.4    -      -       -      +
    144B  LYS*     4.1     2.6    -      -       -      +
    145B  GLU*     2.9    57.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 142 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    105B  VAL*     3.8    16.4    -      -       +      +
    107B  VAL*     3.8    18.4    -      -       +      -
    127B  GLY*     3.3    34.2    -      -       -      +
    128B  VAL      4.2     7.2    -      -       -      +
    138B  SER      2.9    17.0    +      -       -      +
    139B  LEU      3.9     1.6    -      -       -      +
    141B  LYS*     1.3    77.8    -      -       -      +
    143B  ARG*     1.3    56.9    +      -       -      +
    146B  ALA*     2.9    27.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 143 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91B  GLN*     2.4    59.6    +      -       -      +
     93B  VAL*     3.3    29.7    -      -       -      +
    107B  VAL*     3.9    14.4    -      -       +      -
    139B  LEU*     2.9    22.7    +      -       +      +
    140B  GLU*     4.0     2.9    -      -       -      +
    142B  ALA*     1.3    76.0    -      -       -      +
    144B  LYS*     1.3    63.9    +      -       +      +
    146B  ALA*     3.3     1.6    +      -       -      +
    147B  VAL*     3.0    21.6    +      -       -      +
     92C  ASN*     5.2     3.0    +      -       -      +
     94C  ASP*     2.8    34.3    +      -       -      -
    108C  CYS*     3.5    28.3    -      -       -      -
    110C  PHE*     4.4     4.9    -      -       -      -
    124C  VAL*     4.4     9.6    -      -       +      -
    126C  TYR*     3.7    23.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 144 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    140B  GLU*     2.6    57.1    +      -       +      +
    141B  LYS*     4.1     2.7    -      -       -      +
    143B  ARG*     1.3    77.2    -      -       +      +
    145B  GLU*     1.3    62.5    +      -       -      +
    147B  VAL*     3.3     5.0    +      -       -      +
    148B  THR*     3.0    28.0    +      -       -      -
    124C  VAL*     4.4    10.1    -      -       +      +
    126C  TYR*     4.1    12.1    -      -       +      +
    149C  ASP*     2.7    35.4    +      -       -      -
    153C  ARG*     3.3    43.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 145 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    126B  TYR      3.9     4.6    -      -       -      +
    127B  GLY*     4.0     5.1    -      -       -      -
    128B  VAL*     3.3    28.4    +      -       -      +
    141B  LYS*     2.9    46.9    +      -       +      +
    142B  ALA      3.8     2.9    -      -       -      +
    144B  LYS*     1.3    77.8    -      -       -      +
    146B  ALA*     1.3    56.9    +      -       -      +
    148B  THR*     3.3     5.4    +      -       -      -
    149B  ASP*     2.9    32.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 146 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    107B  VAL*     3.2    37.5    -      -       +      +
    109B  ALA*     3.9    15.0    -      -       +      +
    125B  GLY*     3.5     8.8    -      -       -      -
    126B  TYR*     3.4    15.3    -      -       -      -
    127B  GLY*     3.5     1.9    -      -       -      +
    142B  ALA      2.9    16.5    +      -       -      +
    143B  ARG      3.3     5.1    +      -       -      +
    145B  GLU*     1.3    76.7    -      -       -      +
    147B  VAL*     1.3    56.4    +      -       -      +
    150B  GLY*     2.9    24.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 147 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     86B  HIS*     5.4     4.7    -      -       +      +
     88B  ILE*     3.8    22.2    -      -       +      -
     91B  GLN*     3.4    25.4    -      -       -      +
    109B  ALA*     3.9    12.1    -      -       +      -
    111B  VAL*     3.6     8.6    -      -       +      +
    143B  ARG      3.0    10.7    +      -       -      +
    144B  LYS*     3.8     4.5    -      -       -      +
    146B  ALA*     1.3    76.9    -      -       -      +
    148B  THR*     1.3    65.5    +      -       -      +
    150B  GLY      3.2     1.6    +      -       -      -
    151B  LEU*     3.0    21.7    +      -       +      +
    122C  GLU      5.0     1.6    -      -       -      +
    123C  ASP*     3.4    32.1    -      -       -      +
    124C  VAL*     3.5    20.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 148 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     68B  GLY*     4.6    15.3    -      -       -      -
    144B  LYS      3.0    17.6    +      -       -      -
    145B  GLU*     3.9     5.6    -      -       -      -
    147B  VAL*     1.3    76.4    -      -       -      +
    149B  ASP*     1.3    63.4    +      -       -      +
    151B  LEU*     3.2     9.7    +      -       +      +
    152B  LYS*     3.0    39.7    +      -       +      +
    123C  ASP*     5.4     2.0    +      -       -      -
    153C  ARG*     3.8    13.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 149 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    140A  GLU*     4.4     0.5    -      -       -      +
    144A  LYS*     2.6    38.0    +      -       -      -
    125B  GLY*     3.6     1.1    -      -       -      -
    126B  TYR      3.2    18.7    +      -       -      +
    145B  GLU*     2.9    18.0    +      -       +      +
    146B  ALA      3.7     3.4    -      -       -      +
    148B  THR*     1.3    78.6    -      -       -      +
    150B  GLY*     1.3    56.7    +      -       -      +
    152B  LYS*     3.3    20.6    +      -       -      +
    153B  ARG*     2.9    39.0    +      -       -      +
    156B  ARG*     5.6     0.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 150 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    109B  ALA      4.7     0.7    -      -       -      -
    111B  VAL*     3.7    16.9    -      -       -      +
    123B  ASP*     4.5     3.5    -      -       -      +
    124B  VAL      4.0     4.3    -      -       -      -
    125B  GLY*     3.4    23.0    -      -       -      -
    146B  ALA      2.9    13.4    +      -       -      -
    147B  VAL      3.2     3.8    +      -       -      -
    149B  ASP*     1.3    75.7    -      -       -      +
    151B  LEU*     1.3    57.5    +      -       -      +
    153B  ARG*     3.4     1.0    +      -       -      +
    154B  ALA*     2.9    31.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 151 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     71B  VAL*     6.0     1.1    -      -       +      -
     72B  ILE*     4.6    17.0    -      -       +      -
     84B  TRP*     3.9    21.5    -      -       +      -
     86B  HIS*     3.8    39.0    -      -       +      +
    111B  VAL*     3.8    11.3    -      -       +      +
    113B  VAL*     3.6    24.7    -      -       +      -
    147B  VAL*     3.0    13.6    +      -       +      +
    148B  THR*     3.2    11.9    +      -       +      +
    150B  GLY*     1.3    76.9    -      -       -      +
    152B  LYS*     1.3    65.5    +      -       +      +
    154B  ALA*     3.3     0.8    +      -       -      +
    155B  LEU*     3.0    30.4    +      -       +      +
    123C  ASP*     5.7     2.0    -      -       -      +
    157C  SER*     4.8     3.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 152 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     55B  ARG*     6.1     0.6    -      -       -      +
     65B  TYR*     4.8    12.9    -      -       -      +
     66B  ILE*     3.6    26.9    +      -       +      +
     67B  GLU*     5.4     0.2    -      -       -      +
     68B  GLY*     4.3    12.8    -      -       -      +
     71B  VAL*     4.2    32.6    -      -       +      +
    148B  THR*     3.0    26.5    +      -       +      +
    149B  ASP*     3.7    27.1    +      -       -      +
    151B  LEU*     1.3    78.6    -      -       +      +
    153B  ARG*     1.3    57.2    -      -       +      +
    155B  LEU*     3.3     1.9    +      -       -      +
    156B  ARG*     2.9    31.3    +      -       -      +
    162B  LEU      4.8     2.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 153 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    144A  LYS*     3.5    56.6    +      -       -      +
    148A  THR*     3.8    18.6    +      -       -      -
    123B  ASP*     3.0    40.7    +      -       +      +
    124B  VAL      2.7    25.3    +      -       -      +
    149B  ASP*     2.9    29.7    +      -       -      +
    150B  GLY      4.0     2.2    -      -       -      +
    151B  LEU      3.3     0.2    -      -       -      -
    152B  LYS*     1.3    77.2    -      -       +      +
    154B  ALA*     1.3    60.5    +      -       -      +
    156B  ARG*     3.3    64.0    +      -       -      +
    157B  SER*     3.8     5.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 154 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    111B  VAL      3.7    13.5    -      -       -      +
    113B  VAL*     3.6    23.8    -      -       +      -
    121B  HIS*     3.6    37.3    -      -       -      +
    123B  ASP*     3.8    10.6    -      -       -      +
    150B  GLY      2.9    18.8    +      -       -      +
    151B  LEU*     3.8     1.6    -      -       -      +
    152B  LYS      3.3     0.2    -      -       -      -
    153B  ARG*     1.3    75.2    -      -       -      +
    155B  LEU*     1.3    63.3    +      -       -      +
    157B  SER*     3.5    10.5    +      -       -      -
    158B  PHE*     4.3     3.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 155 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     71B  VAL*     3.8    29.4    -      -       +      +
     72B  ILE*     5.5     0.7    -      -       +      -
     75B  ALA*     3.8    25.4    -      -       +      -
     79B  PHE*     4.7     3.4    -      -       +      -
     84B  TRP*     4.0    11.0    -      -       +      -
    113B  VAL*     3.6    31.0    -      -       +      -
    151B  LEU*     3.0    33.5    +      -       +      +
    152B  LYS      3.9     3.4    -      -       -      +
    154B  ALA*     1.3    72.1    -      -       -      +
    156B  ARG*     1.3    66.8    +      -       -      +
    157B  SER      3.1     3.5    +      -       -      -
    158B  PHE*     3.2    28.2    +      -       +      -
    162B  LEU*     3.4    30.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 156 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     72A  ILE*     4.8     9.2    -      -       +      -
    148A  THR*     6.0     0.2    +      -       -      -
    123B  ASP*     5.9     0.8    +      -       -      -
    149B  ASP*     5.6     0.6    +      -       -      -
    152B  LYS*     2.9    15.3    +      -       -      +
    153B  ARG*     3.3    61.0    -      -       -      +
    154B  ALA      3.2     0.2    -      -       -      -
    155B  LEU*     1.3    76.9    -      -       -      +
    157B  SER*     1.3    58.9    +      -       -      +
    158B  PHE      3.0     6.2    +      -       -      -
    159B  GLY      3.4    17.5    +      -       -      +
    162B  LEU      3.9    12.1    +      -       -      +
    163B  GLY*     4.0     9.2    +      -       -      +
    164B  ASN*     3.6    28.6    -      -       -      +
    166B  ILE*     5.3     4.6    -      -       -      +
    167B  LEU*     3.6    40.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 157 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     72A  ILE*     3.3    29.3    -      -       -      +
     76A  ASN*     3.1    17.2    +      -       -      +
     84A  TRP*     3.6    11.1    -      -       -      -
     86A  HIS*     3.8    15.3    -      -       -      -
    151A  LEU*     5.0     1.2    -      -       -      +
    121B  HIS*     3.7    31.6    +      -       -      -
    123B  ASP*     4.4     4.9    +      -       -      -
    153B  ARG      3.8    11.4    +      -       -      -
    154B  ALA*     3.5     4.3    +      -       -      -
    155B  LEU      3.1     1.6    -      -       -      -
    156B  ARG*     1.3    75.6    -      -       -      +
    158B  PHE*     1.3    59.0    +      -       -      +
    159B  GLY      3.4     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