Contacts of the helix formed by residues 141 - 164 (chain B) in PDB entry 1F33


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 141 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     21B  VAL*     4.7     8.9    -      -       +      +
     25B  GLU*     3.4    10.1    +      -       -      +
     29B  THR*     3.8    17.8    +      -       -      +
     83B  ARG*     2.7    35.3    +      -       -      -
     87B  LEU*     4.2     6.3    -      -       -      +
    139B  ALA*     3.5     1.5    -      -       -      +
    140B  LYS*     1.3    77.3    -      -       -      +
    142B  ASP*     1.3    70.3    +      -       -      +
    143B  ASP      3.9     2.5    +      -       -      -
    144B  THR*     2.5    32.8    +      -       -      +
    145B  ALA*     2.9    20.9    +      -       -      +
    133E  ARG*     4.3    12.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 142 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    140B  LYS      3.3     7.5    +      -       -      +
    141B  ASP*     1.3    72.9    +      -       -      +
    143B  ASP*     1.3    65.8    +      -       -      +
    145B  ALA*     3.0    10.0    +      -       -      +
    146B  ASP*     2.9    22.0    +      -       -      +
    133E  ARG*     4.3     8.0    -      -       +      +
    136E  ILE*     3.8    42.9    -      -       +      +
    137E  GLY*     4.3    10.0    +      -       -      -
    149E  THR*     4.3     4.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 143 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     83B  ARG*     3.4    34.5    +      -       -      +
    141B  ASP*     3.3     1.4    +      -       -      -
    142B  ASP*     1.3    78.9    -      -       -      +
    144B  THR*     1.3    63.3    +      -       -      +
    146B  ASP*     3.1     5.1    +      -       -      +
    147B  ILE*     3.0    26.5    +      -       -      +
    133E  ARG*     3.9     5.1    -      -       -      -
    136E  ILE*     3.4    17.4    -      -       -      +
    149E  THR*     3.4    15.4    -      -       -      +
    152E  SER*     2.5    33.5    +      -       -      -
    153E  ARG*     3.7    19.2    +      -       +      +
    156E  ASP*     3.4     7.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 144 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29B  THR*     3.1    22.1    -      -       +      +
     32B  LEU*     5.1     4.9    -      -       +      -
     33B  LEU*     3.5    29.6    -      -       +      -
     83B  ARG*     3.6     9.4    +      -       -      +
    139B  ALA*     4.4     7.9    -      -       +      -
    141B  ASP*     2.5    33.9    +      -       -      -
    143B  ASP*     1.3    75.5    -      -       -      +
    145B  ALA*     1.3    66.1    +      -       -      +
    147B  ILE*     3.3     9.2    +      -       -      +
    148B  LEU*     3.0    34.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 145 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    136B  ILE*     4.0    24.5    -      -       +      +
    139B  ALA*     4.0    16.1    -      -       +      +
    141B  ASP      2.9    12.4    +      -       -      +
    142B  ASP*     3.0    12.3    +      -       -      +
    144B  THR*     1.3    76.2    -      -       -      +
    146B  ASP*     1.3    54.8    +      -       -      +
    148B  LEU*     3.3     4.5    +      -       -      +
    149B  THR*     2.7    38.4    +      -       -      +
----------------------------------------------------------
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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
----------------------------------------------------------
    142B  ASP      2.9     5.4    +      -       -      +
    143B  ASP      3.3     9.4    -      -       -      +
    145B  ALA*     1.3    77.3    -      -       -      +
    147B  ILE*     1.3    63.4    +      -       -      +
    149B  THR*     3.0     8.4    +      -       -      -
    150B  ALA*     3.0    23.4    +      -       -      +
    603C  TRS      2.3    48.3    +      -       -      -
    146E  ASP*     4.2     2.3    -      -       -      +
    149E  THR*     3.6    28.1    -      -       +      +
    150E  ALA*     5.2     3.1    +      -       -      -
    153E  ARG*     3.0    23.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 147 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     33B  LEU*     5.2     2.0    -      -       +      -
     76B  HIS*     4.7     3.7    +      -       -      +
     79B  THR*     3.8    23.3    -      -       +      +
     80B  MET*     3.6    30.7    -      -       +      -
     83B  ARG*     3.6    41.1    -      -       +      -
    143B  ASP      3.0    18.5    +      -       -      +
    144B  THR*     3.5     9.0    -      -       +      +
    146B  ASP*     1.3    77.3    -      -       -      +
    148B  LEU*     1.3    63.5    +      -       +      +
    150B  ALA*     3.3     3.5    +      -       -      +
    151B  ALA*     3.1    21.5    +      -       +      +
    153E  ARG*     3.4    36.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 148 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     32B  LEU*     4.3     7.9    -      -       +      -
     33B  LEU*     4.6     5.8    -      -       +      -
     36B  GLN*     3.9    11.2    -      -       +      -
     80B  MET*     3.8    29.6    -      -       +      -
    132B  VAL*     3.9    19.0    -      -       +      +
    135B  ALA*     3.7    34.8    -      -       +      +
    136B  ILE*     3.9    12.5    -      -       +      +
    139B  ALA*     4.2     6.3    -      -       +      -
    144B  THR*     3.0    35.8    +      -       +      +
    145B  ALA      3.7     4.0    -      -       -      +
    147B  ILE*     1.3    74.1    -      -       -      +
    149B  THR*     1.3    56.2    +      -       -      +
    151B  ALA*     3.4     3.7    +      -       -      +
    152B  SER*     2.7    36.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with THR 149 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    136B  ILE*     3.4    26.3    -      -       +      +
    145B  ALA*     2.7    25.6    +      -       -      +
    146B  ASP*     3.0     9.8    +      -       -      -
    148B  LEU*     1.3    76.6    -      -       -      +
    150B  ALA*     1.3    54.1    +      -       -      +
    152B  SER      3.2     0.3    +      -       -      -
    153B  ARG*     2.8    34.5    +      -       -      +
    142C  ASP*     4.3     5.6    -      -       -      +
    143C  ASP*     3.5    19.7    -      -       -      +
    146C  ASP*     3.7    35.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 150 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     76B  HIS*     3.3    20.5    +      -       +      +
    146B  ASP      3.0    11.6    +      -       -      +
    147B  ILE*     3.6     9.4    -      -       -      +
    149B  THR*     1.3    76.6    -      -       -      +
    151B  ALA*     1.3    62.2    +      -       -      +
    153B  ARG*     3.4     9.3    -      -       -      +
    154B  ASP*     3.4    16.5    +      -       -      +
    146C  ASP*     5.2     0.9    -      -       -      -
    603C  TRS      4.4    18.1    +      -       -      +
    153E  ARG*     4.8    10.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 151 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     40B  PHE*     3.9    19.3    -      -       +      -
     76B  HIS*     3.4    36.0    -      -       +      +
     80B  MET*     5.0     5.6    -      -       -      -
    132B  VAL*     4.7     2.5    -      -       +      -
    147B  ILE*     3.1    16.1    +      -       +      +
    148B  LEU*     3.7     7.2    -      -       -      +
    149B  THR      3.2     0.2    -      -       -      -
    150B  ALA*     1.3    76.2    -      -       -      +
    152B  SER*     1.3    64.4    +      -       -      +
    154B  ASP*     3.1     4.5    +      -       -      +
    155B  LEU*     3.0    28.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 152 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132B  VAL*     4.0    21.0    -      -       -      +
    133B  ARG*     3.6    20.8    -      -       -      +
    136B  ILE*     3.7     9.0    -      -       -      -
    148B  LEU      2.7    22.3    +      -       -      -
    149B  THR      3.5     0.4    -      -       -      -
    151B  ALA*     1.3    72.2    -      -       -      +
    153B  ARG*     1.3    65.4    +      -       -      +
    155B  LEU*     3.1     2.0    +      -       -      +
    156B  ASP*     2.9    29.1    +      -       -      +
    143C  ASP*     2.6    33.0    +      -       -      -
----------------------------------------------------------
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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
----------------------------------------------------------
    149B  THR      2.8    16.1    +      -       -      +
    150B  ALA*     3.4     9.9    -      -       -      +
    152B  SER*     1.3    77.7    -      -       -      +
    154B  ASP*     1.3    63.4    +      -       -      +
    156B  ASP*     3.7     4.5    +      -       -      +
    157B  LYS*     3.3    19.4    +      -       -      +
     79C  THR*     3.6    18.6    -      -       -      +
     83C  ARG*     5.1     2.9    +      -       -      +
     86C  GLN*     4.4     3.6    -      -       -      +
    143C  ASP*     3.7    27.3    +      -       +      +
    146C  ASP*     2.9    28.6    +      -       -      -
    147C  ILE*     3.4    44.7    -      -       +      +
    150C  ALA*     4.8     9.1    -      -       -      +
    603C  TRS      4.4    10.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 154 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     72B  ALA*     4.2     8.5    -      -       -      +
     76B  HIS*     2.7    32.0    +      -       +      +
    150B  ALA      3.4     3.7    +      -       -      -
    151B  ALA      3.1     8.3    +      -       -      +
    153B  ARG*     1.3    80.5    -      -       -      +
    155B  LEU*     1.3    61.6    +      -       +      +
    157B  LYS*     3.0    12.8    +      -       -      +
    158B  PHE*     2.8    58.4    +      -       +      -
----------------------------------------------------------
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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
----------------------------------------------------------
     40B  PHE*     3.2    37.5    -      -       +      -
     43B  LEU*     3.8    20.0    -      -       +      -
     73B  LEU*     4.2    14.1    -      -       +      -
     76B  HIS*     5.4     1.1    -      -       +      -
    125B  TYR*     4.2    10.3    -      -       +      +
    128B  VAL*     3.5    30.3    -      -       +      -
    129B  ALA*     3.9    21.3    -      -       +      +
    132B  VAL*     4.8     2.2    -      -       +      -
    151B  ALA*     3.0    26.3    +      -       -      +
    152B  SER*     3.8     5.2    -      -       -      +
    154B  ASP*     1.3    78.7    -      -       +      +
    156B  ASP*     1.3    57.7    +      -       -      +
    158B  PHE*     3.7     6.9    -      -       +      +
    159B  LEU*     2.8    31.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 156 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    129B  ALA*     3.7    11.3    -      -       -      +
    133B  ARG*     2.6    33.2    +      -       -      -
    152B  SER*     2.9    19.3    +      -       -      +
    153B  ARG      4.0     1.8    -      -       -      +
    155B  LEU*     1.3    74.6    -      -       -      +
    157B  LYS*     1.3    62.2    +      -       -      +
    159B  LEU*     3.7     7.1    -      -       -      +
    160B  TRP*     3.1    23.7    +      -       -      +
     19C  ASN*     3.4    15.4    +      -       -      +
     83C  ARG*     2.7    41.6    +      -       -      +
     86C  GLN*     3.8     8.7    -      -       +      +
    143C  ASP*     3.3     5.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 157 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    153B  ARG      3.3    12.2    +      -       -      +
    154B  ASP*     3.0    16.7    +      -       -      +
    156B  ASP*     1.3    79.6    -      -       -      +
    158B  PHE*     1.3    71.3    +      -       +      +
    160B  TRP*     3.3    10.4    +      -       +      +
    161B  PHE*     2.9    57.4    +      -       +      +
     82C  GLU*     4.1    19.7    +      -       -      +
     86C  GLN*     3.7    24.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 158 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     68B  GLY      5.3     0.2    -      -       -      -
     69B  PHE*     3.4    58.6    -      +       +      -
     72B  ALA*     3.6    32.8    -      -       +      -
     73B  LEU*     4.0    15.7    -      -       +      -
     76B  HIS*     5.7     0.2    -      +       -      -
    125B  TYR*     3.7    19.1    -      +       +      -
    154B  ASP*     2.8    47.2    +      -       +      +
    155B  LEU*     3.7     6.1    -      -       -      +
    157B  LYS*     1.3    86.8    -      -       +      +
    159B  LEU*     1.3    61.2    +      -       -      +
    161B  PHE*     3.0     2.0    +      +       -      +
    162B  ILE*     2.8    35.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 159 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    122B  ALA*     3.4    31.0    -      -       -      +
    125B  TYR*     4.2    10.2    -      -       +      -
    126B  ALA*     3.9    21.3    -      -       +      +
    129B  ALA*     4.4    10.8    -      -       +      -
    130B  ASN*     5.3     0.2    -      -       -      +
    155B  LEU      2.8    20.5    +      -       -      +
    156B  ASP*     3.7     4.7    -      -       -      +
    158B  PHE*     1.3    71.7    -      -       -      +
    160B  TRP*     1.3    58.2    +      -       -      +
    162B  ILE*     3.2     4.4    +      -       -      +
    163B  GLU*     2.8    57.3    +      -       +      +
     17C  THR*     4.5     1.6    -      -       -      +
     18C  ARG      4.2     0.9    -      -       -      -
     19C  ASN*     3.7    42.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with TRP 160 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    156B  ASP      3.1    11.4    +      -       -      +
    157B  LYS*     3.4     9.9    -      -       +      +
    159B  LEU*     1.3    80.7    -      -       -      +
    161B  PHE*     1.3    89.3    +      +       -      +
    163B  GLU*     3.9     8.9    -      -       +      +
    164B  SER*     2.6    65.4    +      -       -      -
     17C  THR*     5.7     1.3    -      -       -      -
     82C  GLU*     3.9    32.8    -      -       +      -
     85C  VAL*     3.2    41.6    -      -       +      +
     86C  GLN*     3.4    42.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 161 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65B  MET*     3.9    14.6    -      -       +      -
     69B  PHE*     3.7    29.4    -      +       +      -
    157B  LYS*     2.9    39.7    +      -       +      +
    158B  PHE      3.0     7.2    +      -       -      +
    160B  TRP*     1.3   114.9    -      +       -      +
    162B  ILE*     1.3    65.1    +      -       -      +
    164B  SER*     3.5     5.9    +      -       -      -
    165B  ASN*     2.8    30.1    +      -       -      -
     82C  GLU*     5.6     2.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 162 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65B  MET*     4.5    10.1    -      -       +      -
     66B  LEU*     4.7     6.3    -      -       +      -
     69B  PHE*     3.7    15.5    -      -       +      -
    118B  LEU*     3.3    40.0    -      -       +      +
    121B  LEU*     4.0    11.0    -      -       +      -
    122B  ALA*     3.8    11.0    -      -       +      +
    125B  TYR*     3.6    52.5    -      -       +      -
    158B  PHE      2.8    19.7    +      -       -      +
    159B  LEU*     3.5     4.5    -      -       -      +
    161B  PHE*     1.3    73.0    -      -       -      +
    163B  GLU*     1.3    64.6    +      -       -      +
    165B  ASN*     3.0    18.6    +      -       -      +
    166B  ILE*     3.6     7.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 163 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    122B  ALA*     4.3     4.0    -      -       +      -
    159B  LEU*     2.8    34.1    +      -       +      +
    160B  TRP*     3.9     7.2    -      -       +      +
    162B  ILE*     1.3    72.9    -      -       -      +
    164B  SER*     1.3    58.9    +      -       -      +
    166B  ILE*     2.9    37.6    +      -       +      +
     16C  TYR*     4.3     3.6    -      -       -      +
     17C  THR*     2.7    32.7    +      -       -      -
     18C  ARG*     2.8    61.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 164 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    160B  TRP*     2.6    50.6    +      -       -      -
    161B  PHE*     3.9     8.7    -      -       -      -
    162B  ILE      3.2     0.2    -      -       -      -
    163B  GLU*     1.3    74.4    -      -       -      +
    165B  ASN*     1.3    61.9    +      -       -      +
    166B  ILE      3.4     3.3    -      -       -      +
----------------------------------------------------------
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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