Contacts of the helix formed by residues 133 - 157 (chain B) in PDB entry 1O9R


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 ASP 133 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     10B  LEU*     3.5    32.4    -      -       +      +
     18B  VAL*     3.7    18.9    -      -       +      +
     72B  ARG*     3.1    16.6    +      -       -      -
     76B  LEU*     3.9     1.7    -      -       -      +
    128B  SER      3.1    15.9    +      -       -      +
    129B  ASP*     4.2     1.0    +      -       -      -
    131B  ALA      4.9     0.9    -      -       -      +
    132B  GLY*     1.3    77.9    -      -       -      +
    134B  PRO*     1.3    57.9    -      -       -      +
    135B  THR*     3.4     4.5    +      -       -      -
    136B  THR*     2.5    36.5    +      -       -      -
    137B  ALA*     2.9    25.5    +      -       -      +
    122D  ARG*     5.6     0.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with PRO 134 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     10B  LEU*     5.8     0.2    -      -       +      -
    129B  ASP*     4.4    14.7    -      -       -      +
    132B  GLY*     3.2    14.1    -      -       -      +
    133B  ASP*     1.3    82.9    -      -       -      +
    135B  THR*     1.3    60.4    +      -       -      +
    137B  ALA*     3.6     9.1    -      -       +      +
    138B  ASP*     2.9    29.5    +      -       -      +
    122D  ARG*     5.7     5.6    -      -       +      +
    125D  ILE*     4.0    26.7    -      -       +      -
    126D  ASP*     3.6    24.5    -      -       -      +
    141D  THR*     4.0     6.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with THR 135 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     72B  ARG*     3.5    33.7    -      -       -      +
    133B  ASP*     3.2     2.5    +      -       -      -
    134B  PRO*     1.3    78.9    -      -       -      +
    136B  THR*     1.3    61.6    +      -       -      +
    138B  ASP*     3.3     5.7    +      -       -      +
    139B  ILE*     3.3    21.0    +      -       +      +
    122D  ARG*     4.9     5.1    +      -       -      +
    125D  ILE*     3.6    11.6    -      -       -      +
    141D  THR*     4.3     7.9    -      -       -      +
    144D  SER*     2.7    33.3    +      -       -      +
    145D  ARG*     3.6    29.2    -      -       +      +
    148D  ASP*     4.3     1.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 136 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18B  VAL*     3.3    24.6    -      -       +      +
     22B  LEU*     4.0    11.4    -      -       +      -
     72B  ARG*     2.8    25.9    +      -       +      +
     76B  LEU*     4.2     0.3    -      -       -      +
    128B  SER*     3.5    14.1    -      -       -      +
    133B  ASP*     2.5    34.9    +      -       -      -
    135B  THR*     1.3    72.4    -      -       -      +
    137B  ALA*     1.3    66.2    +      -       -      +
    139B  ILE*     3.0    18.4    +      -       -      +
    140B  PHE*     3.1    24.6    +      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 137 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    125B  ILE*     3.7    28.1    -      -       +      +
    128B  SER*     3.8    11.8    -      -       -      -
    129B  ASP*     4.0    11.2    -      -       +      +
    133B  ASP      2.9    16.9    +      -       -      +
    134B  PRO*     3.2    11.0    +      -       +      +
    136B  THR*     1.3    76.0    -      -       -      +
    138B  ASP*     1.3    52.4    +      -       -      +
    140B  PHE*     3.3     6.5    +      -       -      +
    141B  THR*     2.8    35.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 138 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    134B  PRO      2.9     6.3    +      -       -      +
    135B  THR      3.4     9.9    -      -       -      +
    136B  THR      3.1     0.2    -      -       -      -
    137B  ALA*     1.3    74.6    -      -       -      +
    139B  ILE*     1.4    66.1    +      -       -      +
    141B  THR*     3.5     9.1    -      -       -      +
    142B  ALA*     2.9    23.4    +      -       -      +
   1164B  TRS      2.6    49.1    +      -       -      -
    138D  ASP*     4.1     1.6    -      -       -      +
    141D  THR*     3.4    29.0    -      -       +      +
    145D  ARG*     2.9    23.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 139 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     22B  LEU*     5.1     4.5    -      -       +      -
     65B  HIS*     4.7     2.8    +      -       -      +
     68B  THR*     3.6    29.8    -      -       +      +
     69B  ILE*     4.0    27.6    -      -       +      +
     72B  ARG*     3.7    40.2    -      -       +      +
     75B  GLN*     5.5     2.2    -      -       -      +
    135B  THR*     3.3    12.7    +      -       +      +
    136B  THR*     3.0     9.0    +      -       +      +
    138B  ASP*     1.4    78.1    -      -       -      +
    140B  PHE*     1.4    63.1    +      -       +      +
    142B  ALA*     3.4     3.3    +      -       -      +
    143B  ALA*     3.1    22.2    +      -       +      +
    145D  ARG*     3.6    32.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 140 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     21B  ILE*     3.7    25.6    -      -       +      -
     22B  LEU*     3.6    21.5    -      -       +      -
     25B  SER*     3.5    27.8    -      -       -      -
     69B  ILE*     4.0    17.5    -      -       +      -
    121B  ILE*     3.2    26.2    -      -       +      +
    124B  ALA*     3.7    15.3    -      -       +      -
    125B  ILE*     3.7    20.4    -      -       +      +
    128B  SER*     3.3    28.3    -      -       -      -
    136B  THR*     3.1    32.2    +      -       +      -
    137B  ALA      3.7     3.1    -      -       -      +
    139B  ILE*     1.4    80.1    -      -       +      +
    141B  THR*     1.4    56.5    +      -       -      +
    143B  ALA*     3.3     2.6    +      -       +      -
    144B  SER*     2.8    25.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with THR 141 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    125B  ILE*     3.5    28.6    -      -       +      +
    137B  ALA*     2.8    22.8    +      -       -      +
    138B  ASP*     3.1    12.7    +      -       -      +
    140B  PHE*     1.4    71.5    -      -       -      +
    142B  ALA*     1.3    66.6    +      -       -      +
    144B  SER*     3.2     2.5    +      -       -      -
    145B  ARG*     3.0    35.1    +      -       +      +
   1164B  TRS      5.3     5.8    -      -       -      +
----------------------------------------------------------
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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
----------------------------------------------------------
     65B  HIS*     3.6    18.6    +      -       +      -
    138B  ASP      2.9    15.7    +      -       -      +
    139B  ILE*     3.8     4.3    -      -       -      +
    141B  THR*     1.3    79.1    -      -       -      +
    143B  ALA*     1.3    60.8    +      -       -      +
    145B  ARG*     3.3    15.9    +      -       -      +
    146B  ASP*     3.4    11.3    +      -       -      +
   1164B  TRS      4.4    19.0    +      -       -      +
    145D  ARG*     4.4    15.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 143 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65B  HIS*     3.5    35.8    -      -       +      +
     69B  ILE*     5.0     9.6    -      -       +      -
    121B  ILE*     4.1    12.8    -      -       +      -
    139B  ILE*     3.1    16.7    +      -       +      +
    140B  PHE*     3.6     6.3    -      -       -      +
    141B  THR      3.3     0.2    -      -       -      -
    142B  ALA*     1.3    77.3    -      -       -      +
    144B  SER*     1.4    56.8    +      -       -      +
    146B  ASP*     3.2     4.0    +      -       -      +
    147B  LEU*     2.8    38.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 144 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    118B  ALA      5.1     1.6    +      -       -      -
    121B  ILE*     3.6    14.1    -      -       -      +
    122B  ARG*     4.2    13.1    +      -       -      +
    125B  ILE*     3.8    20.5    -      -       -      +
    140B  PHE      2.8    22.1    +      -       -      -
    141B  THR*     3.2     5.8    +      -       -      -
    143B  ALA*     1.4    68.9    -      -       -      +
    145B  ARG*     1.4    62.0    -      -       -      +
    147B  LEU*     4.4     4.5    -      -       -      +
    148B  ASP*     2.8    45.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 145 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    141B  THR*     3.0    25.2    +      -       +      +
    142B  ALA*     3.6    10.8    -      -       -      +
    143B  ALA      3.2     0.6    -      -       -      -
    144B  SER*     1.4    77.8    -      -       -      +
    146B  ASP*     1.3    65.5    +      -       -      +
    148B  ASP*     4.1     3.8    -      -       -      +
    149B  LYS*     3.1    24.3    +      -       -      +
   1164B  TRS      3.8    29.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 146 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     61B  GLN*     3.8    29.1    +      -       +      +
     65B  HIS*     2.7    37.8    +      -       +      +
    142B  ALA      3.4     4.1    +      -       -      +
    143B  ALA      3.2     3.6    +      -       -      +
    145B  ARG*     1.3    80.7    -      -       -      +
    147B  LEU*     1.4    62.7    +      -       +      +
    149B  LYS*     3.4     9.3    +      -       -      +
    150B  SER*     2.8    34.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 147 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29B  VAL*     5.5     2.7    -      -       +      -
     32B  LEU*     4.1     9.6    -      -       +      -
     62B  LEU*     4.1    24.0    -      -       +      -
     65B  HIS*     6.1     2.5    -      -       +      -
    114B  TYR*     4.3    14.1    -      -       +      +
    117B  VAL*     3.8    27.8    -      -       +      +
    118B  ALA*     4.0    16.4    -      -       +      +
    121B  ILE*     3.5    36.6    -      -       +      -
    143B  ALA*     2.8    26.4    +      -       +      +
    144B  SER*     4.0     3.8    -      -       -      +
    146B  ASP*     1.4    79.1    -      -       +      +
    148B  ASP*     1.3    57.7    +      -       -      +
    150B  SER*     3.8     3.6    -      -       -      +
    151B  LEU*     2.8    30.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 148 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    118B  ALA*     3.6    12.0    -      -       -      +
    122B  ARG*     2.9    44.3    +      -       -      -
    144B  SER*     2.8    29.9    +      -       -      +
    145B  ARG*     4.2     3.6    -      -       -      +
    147B  LEU*     1.3    72.8    -      -       -      +
    149B  LYS*     1.3    62.4    +      -       -      +
    151B  LEU*     3.7     8.8    -      -       -      +
    152B  TRP*     3.1    22.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 149 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    145B  ARG      3.1    19.4    +      -       -      +
    146B  ASP*     3.8    10.3    -      -       -      +
    148B  ASP*     1.3    75.8    -      -       -      +
    150B  SER*     1.3    60.0    +      -       -      +
    152B  TRP*     3.3    25.2    +      -       +      +
    153B  PHE*     2.9    59.5    +      -       +      -
----------------------------------------------------------
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Residues in contact with SER 150 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     58B  PHE*     3.5    36.9    -      -       -      +
     61B  GLN*     3.6    10.7    +      -       -      -
    114B  TYR*     3.9    20.9    -      -       -      -
    146B  ASP      2.8    18.3    +      -       -      -
    147B  LEU*     3.8     5.2    -      -       -      -
    149B  LYS*     1.3    73.3    -      -       -      +
    151B  LEU*     1.4    66.1    +      -       -      +
    153B  PHE*     3.2     4.6    +      -       -      +
    154B  LEU*     3.0    28.6    +      -       -      +
----------------------------------------------------------
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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
----------------------------------------------------------
    111B  ILE*     3.9    13.2    -      -       +      +
    114B  TYR*     4.2     9.7    -      -       +      -
    115B  GLY*     3.7    37.2    -      -       -      +
    118B  ALA*     4.5    12.1    -      -       +      -
    119B  ASN*     5.6     2.7    -      -       -      +
    122B  ARG*     5.4     3.6    -      -       -      +
    147B  LEU      2.8    18.7    +      -       -      +
    148B  ASP*     3.7    10.5    -      -       -      +
    150B  SER*     1.4    75.7    -      -       -      +
    152B  TRP*     1.3    57.5    +      -       -      +
    154B  LEU*     3.2     8.8    +      -       +      +
    155B  GLU*     2.9    60.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with TRP 152 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    148B  ASP      3.1    15.7    +      -       -      +
    149B  LYS*     3.6    26.9    -      -       +      +
    150B  SER      3.3     0.2    -      -       -      -
    151B  LEU*     1.3    74.6    -      -       -      +
    153B  PHE*     1.3    93.6    +      +       -      +
    155B  GLU*     3.2     8.9    +      -       -      +
    156B  ALA*     2.7    45.8    +      -       +      +
    159B  GLN*     4.8     7.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 153 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     54B  LEU*     3.9    32.5    -      -       +      -
     58B  PHE*     3.9    17.0    -      +       +      -
    149B  LYS*     2.9    39.7    +      -       +      +
    150B  SER*     3.2     8.5    +      -       -      +
    152B  TRP*     1.3   118.2    -      +       -      +
    154B  LEU*     1.3    59.5    +      -       -      +
    156B  ALA*     3.6     9.0    +      -       +      +
    157B  HIS*     2.8    26.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 154 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     51B  VAL*     5.9     1.6    -      -       +      -
     54B  LEU*     5.3     5.2    -      -       +      -
     55B  LEU*     4.4     5.6    -      -       +      -
     58B  PHE*     3.8    20.2    -      -       +      -
    107B  LEU*     3.9    24.8    -      -       +      +
    110B  LEU*     4.1    26.5    -      -       +      +
    111B  ILE*     3.6    20.5    -      -       +      +
    114B  TYR*     3.6    43.7    -      -       +      -
    150B  SER      3.0    18.4    +      -       -      +
    151B  LEU*     3.6     5.8    -      -       -      +
    153B  PHE*     1.3    74.9    -      -       -      +
    155B  GLU*     1.3    65.3    +      -       -      +
    157B  HIS*     3.0    23.5    +      -       +      +
    158B  VAL*     3.9     2.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 155 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    111B  ILE*     3.8    33.2    -      -       +      +
    151B  LEU*     2.9    47.3    +      -       +      +
    152B  TRP*     3.9     7.0    -      -       -      +
    154B  LEU*     1.3    76.2    -      -       -      +
    156B  ALA*     1.3    58.1    +      -       -      +
    158B  VAL*     2.9     8.1    +      -       +      +
    159B  GLN*     2.9    53.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 156 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    152B  TRP*     2.7    41.0    +      -       +      +
    153B  PHE*     3.9     7.0    -      -       -      +
    154B  LEU      3.2     0.2    -      -       -      -
    155B  GLU*     1.3    72.5    -      -       -      +
    157B  HIS*     1.3    62.0    +      -       +      +
    158B  VAL      3.2     0.4    +      -       -      -
    159B  GLN*     3.3    18.6    +      -       -      +
    160B  GLU*     4.7     5.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 157 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     47B  GLN*     2.9    42.0    +      -       -      +
     50B  ALA*     5.9     0.9    -      -       +      -
     51B  VAL*     4.1     9.8    -      -       +      +
     54B  LEU*     4.2    18.6    -      -       +      +
    107B  LEU*     3.8    25.8    -      -       +      +
    153B  PHE*     2.8    30.9    +      -       -      +
    154B  LEU*     3.0    14.7    +      -       +      +
    156B  ALA*     1.3    80.1    -      -       +      +
    158B  VAL*     1.3    59.4    +      -       -      +
    160B  GLU      3.6    11.8    -      -       -      +
----------------------------------------------------------
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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