Contacts of the helix formed by residues 145 - 167 (chain B) in PDB entry 2NP5


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 GLU 145 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    143B  THR      3.6     0.6    +      -       -      -
    144B  PRO*     1.3    74.2    -      -       +      +
    146B  ALA*     1.3    65.0    +      -       -      +
    147B  GLU      3.4     2.2    -      -       -      -
    148B  THR*     3.2    14.1    +      -       -      -
    149B  ARG*     2.9    30.8    +      -       +      +
    178D  HIS*     2.9    36.7    +      -       -      -
    182D  ILE*     3.7    22.3    -      -       +      +
----------------------------------------------------------
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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
----------------------------------------------------------
    135B  SER*     4.6     1.8    -      -       -      +
    138B  LEU*     3.6    15.7    -      -       +      +
    139B  ILE*     3.6    40.4    -      -       +      +
    143B  THR*     3.5    17.4    +      -       -      +
    144B  PRO      3.1     5.6    +      -       -      -
    145B  GLU*     1.3    74.1    -      -       -      +
    147B  GLU*     1.3    57.9    +      -       -      +
    149B  ARG*     3.3     1.1    +      -       -      -
    150B  ALA*     2.9    30.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 147 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    131B  ARG*     4.9    13.7    +      -       -      +
    135B  SER*     3.6    23.1    +      -       -      +
    139B  ILE*     5.4     7.5    -      -       +      +
    145B  GLU      3.4     0.8    -      -       -      -
    146B  ALA*     1.3    78.7    -      -       -      +
    148B  THR*     1.3    58.4    +      -       -      +
    150B  ALA*     3.5     3.6    +      -       -      +
    151B  ALA*     3.1    22.0    +      -       -      +
    175D  TYR*     3.8    10.9    +      -       +      +
----------------------------------------------------------
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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
----------------------------------------------------------
    145B  GLU*     3.2    18.5    +      -       -      -
    147B  GLU*     1.3    77.4    -      -       -      +
    149B  ARG*     1.3    60.6    +      -       -      +
    151B  ALA*     3.2     3.5    +      -       -      +
    152B  LEU*     2.9    28.5    +      -       +      +
    175D  TYR*     3.8    18.3    +      -       +      +
    178D  HIS*     3.3    28.2    +      -       +      -
    179D  ALA*     3.7    32.5    -      -       +      -
    182D  ILE*     4.0    15.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 149 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    138B  LEU*     4.0    11.0    -      -       +      -
    143B  THR*     3.8     8.6    -      -       -      +
    144B  PRO*     3.2    33.0    +      -       -      +
    145B  GLU*     2.9    22.6    +      -       -      +
    146B  ALA      3.8     3.4    -      -       -      +
    148B  THR*     1.3    76.3    -      -       -      +
    150B  ALA*     1.3    57.6    +      -       -      +
    152B  LEU*     3.3     4.0    +      -       -      -
    153B  LEU*     2.9    26.7    +      -       -      +
    186B  MSE      3.8     2.8    +      -       -      -
    187B  ILE*     2.7    60.2    +      -       +      +
    189B  GLN*     2.9    28.1    +      -       -      +
    182D  ILE*     4.1    17.8    -      -       +      +
    186D  MSE      3.8    27.1    -      -       -      +
    189D  GLN*     5.5     4.4    +      -       -      -
----------------------------------------------------------
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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
----------------------------------------------------------
    131B  ARG*     4.0     5.8    -      -       -      +
    134B  LEU*     3.7    21.6    -      -       +      +
    135B  SER*     3.2    44.2    -      -       -      +
    138B  LEU*     3.6     8.6    -      -       +      +
    146B  ALA      2.9    15.0    +      -       -      +
    147B  GLU      3.5     1.8    -      -       -      +
    149B  ARG*     1.3    74.7    -      -       -      +
    151B  ALA*     1.3    63.4    +      -       -      +
    153B  LEU*     3.3     6.0    +      -       -      +
    154B  LEU*     3.2    18.5    +      -       -      +
----------------------------------------------------------
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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
----------------------------------------------------------
    131B  ARG*     3.6    31.9    -      -       -      +
    147B  GLU      3.1     7.6    +      -       -      +
    148B  THR*     3.2     5.8    +      -       +      +
    150B  ALA*     1.3    75.5    -      -       -      +
    152B  LEU*     1.3    59.3    +      -       +      +
    154B  LEU*     3.4     3.3    +      -       -      +
    155B  ALA*     3.0    29.4    +      -       -      +
    160D  LEU*     4.9     3.6    -      -       +      +
    171D  TYR*     4.9     7.2    +      -       +      -
    175D  TYR*     3.0    36.3    -      -       +      +
    179D  ALA*     5.8     1.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 152 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    148B  THR*     2.9    22.7    +      -       +      +
    149B  ARG*     3.5     6.5    -      -       -      +
    150B  ALA      3.2     0.2    -      -       -      -
    151B  ALA*     1.3    73.9    -      -       -      +
    153B  LEU*     1.3    67.0    +      -       -      +
    155B  ALA*     3.3     1.9    +      -       -      -
    156B  THR*     2.9    28.0    +      -       -      -
    183B  GLN*     4.6     0.7    -      -       -      -
    187B  ILE*     4.5     3.6    -      -       +      -
    156D  THR*     3.6    24.2    -      -       +      +
    160D  LEU*     4.0    10.5    -      -       +      -
    179D  ALA*     3.5    41.1    -      -       +      +
    182D  ILE*     3.5    28.5    -      -       +      -
    183D  GLN*     3.6    20.2    -      -       +      +
    186D  MSE      3.7    11.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 153 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     85B  LEU*     4.2    26.2    -      -       +      -
     89B  MSE      3.9    23.1    -      -       +      -
    134B  LEU*     4.2     9.9    -      -       +      -
    138B  LEU*     5.8     1.8    -      -       +      -
    149B  ARG      2.9    16.5    +      -       -      +
    150B  ALA*     3.3     7.4    +      -       -      +
    152B  LEU*     1.3    77.7    -      -       -      +
    154B  LEU*     1.3    62.2    +      -       -      +
    156B  THR*     3.3     5.0    +      -       -      -
    157B  VAL*     3.1    27.8    +      -       +      +
    180B  LEU*     4.0    22.9    -      -       +      -
    183B  GLN*     3.8    25.6    -      -       +      +
    184B  ILE*     4.1    15.5    -      -       +      -
    187B  ILE*     4.5    16.9    -      -       +      +
----------------------------------------------------------
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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
----------------------------------------------------------
     89B  MSE      4.4     6.1    -      -       -      -
     92B  LEU*     4.0    21.1    -      -       +      -
    127B  LEU*     3.6    26.0    -      -       +      +
    130B  ILE*     3.8    38.6    -      -       +      -
    131B  ARG*     3.7    25.4    -      -       +      -
    134B  LEU*     4.1     7.3    -      -       +      +
    150B  ALA      3.2    10.4    +      -       -      +
    151B  ALA      3.7     7.9    -      -       -      +
    153B  LEU*     1.3    78.8    -      -       -      +
    155B  ALA*     1.3    58.2    +      -       -      +
    157B  VAL*     3.2     7.6    +      -       +      +
    158B  ASP*     3.0    44.2    +      -       -      +
    163D  ASP*     4.7     1.8    -      -       -      +
    171D  TYR*     5.1     1.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 155 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    151B  ALA      3.0    17.9    +      -       -      +
    152B  LEU*     3.7     4.7    -      -       -      +
    154B  LEU*     1.3    77.2    -      -       -      +
    156B  THR*     1.3    51.0    +      -       -      +
    158B  ASP      3.1     1.1    +      -       -      +
    159B  GLY*     2.7    32.4    +      -       -      -
    155D  ALA      3.9     0.2    -      -       -      +
    156D  THR*     3.9     6.7    -      -       +      +
    159D  GLY*     3.3     8.6    -      -       -      -
    160D  LEU*     3.7    42.8    -      -       +      +
    163D  ASP*     3.6    16.1    +      -       -      +
    171D  TYR*     5.8     0.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 156 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    152B  LEU      2.9    15.6    +      -       -      -
    153B  LEU*     3.4     9.9    -      -       +      +
    155B  ALA*     1.3    74.1    -      -       -      +
    157B  VAL*     1.3    58.0    +      -       +      +
    159B  GLY      3.6     0.3    -      -       -      -
    160B  LEU*     2.7    48.1    +      -       +      +
    180B  LEU*     5.5     2.0    -      -       +      -
    183B  GLN*     3.3    27.9    +      -       +      -
    152D  LEU*     3.5    29.6    -      -       +      -
    155D  ALA*     4.2     1.3    -      -       +      +
    156D  THR*     2.7    30.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 157 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     89B  MSE      3.8    34.5    -      -       +      +
     92B  LEU*     3.5    44.9    -      -       +      +
     93B  LEU*     3.5    17.4    -      -       +      +
    153B  LEU*     3.1    13.9    +      -       +      +
    154B  LEU      3.4     9.0    -      -       -      +
    156B  THR*     1.3    84.4    -      -       +      +
    158B  ASP*     1.3    60.6    +      -       -      +
    160B  LEU*     4.6     0.9    -      -       +      -
    161B  ALA*     3.0    28.4    +      -       -      +
    180B  LEU*     4.0    15.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 158 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     92B  LEU*     5.2     5.1    -      -       -      +
    123B  ARG*     4.4     3.4    +      -       -      -
    127B  LEU*     3.8    14.3    -      -       -      +
    154B  LEU*     3.0    28.3    +      -       -      +
    155B  ALA      3.7     3.8    -      -       -      +
    157B  VAL*     1.3    79.6    -      -       -      +
    159B  GLY*     1.3    57.5    +      -       -      +
    161B  ALA*     3.4     6.9    +      -       -      +
    162B  LEU*     3.0    28.8    +      -       -      +
    159D  GLY*     4.3     5.6    -      -       -      +
    162D  LEU*     4.6    10.8    -      -       +      +
    163D  ASP*     2.6    37.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 159 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    155B  ALA      2.7    15.3    +      -       -      -
    158B  ASP*     1.3    70.9    -      -       -      +
    160B  LEU*     1.3    53.8    +      -       -      +
    162B  LEU*     3.3     4.8    +      -       -      +
    163B  ASP*     2.7    40.8    +      -       -      +
    155D  ALA*     3.1    28.5    -      -       -      -
    158D  ASP*     4.3     1.8    -      -       -      -
    159D  GLY*     3.5    12.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 160 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     93B  LEU*     4.0    15.0    -      -       +      -
    156B  THR*     2.7    42.0    +      -       +      +
    157B  VAL*     3.8     4.7    -      -       +      +
    159B  GLY*     1.3    69.8    -      -       -      +
    161B  ALA*     1.3    60.7    +      -       -      +
    163B  ASP*     3.8     2.7    -      -       -      +
    164B  ALA*     2.9    32.1    +      -       -      +
    171B  TYR*     4.1    22.9    -      -       +      -
    175B  TYR*     5.2     0.9    -      -       +      -
    176B  LEU*     3.9    25.0    -      -       +      +
    179B  ALA*     3.9    29.8    -      -       +      -
    180B  LEU*     4.5     9.4    -      -       +      +
    151D  ALA*     5.0     3.6    -      -       +      +
    152D  LEU*     4.2     3.1    -      -       +      -
    155D  ALA*     3.7    20.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 161 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     92B  LEU      4.0    11.0    -      -       -      +
     93B  LEU*     4.3     0.6    -      -       -      +
     94B  PRO*     3.7    27.8    -      -       +      -
    103B  ALA*     4.2    13.7    -      -       +      +
    157B  VAL      3.0    18.1    +      -       -      +
    158B  ASP*     3.6     7.2    -      -       -      +
    160B  LEU*     1.3    75.6    -      -       -      +
    162B  LEU*     1.3    58.3    +      -       -      +
    164B  ALA*     3.1     2.3    +      -       -      +
    165B  ILE*     2.9    36.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 162 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    107B  ALA*     3.9    26.0    -      -       +      -
    158B  ASP      3.0    18.0    +      -       -      +
    159B  GLY      3.6     3.4    -      -       -      +
    161B  ALA*     1.3    74.7    -      -       -      +
    163B  ASP*     1.3    67.3    +      -       -      +
    164B  ALA      3.2     0.9    +      -       -      -
    165B  ILE*     3.4    23.3    +      -       +      +
    166B  GLY*     3.8     3.1    +      -       -      -
    107D  ALA*     4.6     8.1    -      -       +      +
    110D  ALA*     3.7    33.6    -      -       +      +
    111D  VAL*     4.4     8.5    -      -       +      -
    123D  ARG*     4.4    10.1    +      -       -      +
    158D  ASP*     4.1    26.9    -      -       +      +
    162D  LEU*     4.2    25.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 163 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    159B  GLY      2.7    25.5    +      -       -      +
    160B  LEU      4.0     3.1    -      -       -      +
    162B  LEU*     1.3    72.8    -      -       -      +
    164B  ALA*     1.3    56.6    +      -       -      +
    166B  GLY*     3.6     1.6    +      -       -      -
    167B  SER*     3.2    28.4    +      -       -      -
    171B  TYR*     3.7    30.9    +      -       +      -
    123D  ARG*     2.8    24.4    +      -       -      +
    127D  LEU*     3.9    14.1    -      -       +      +
    154D  LEU*     4.5     1.6    -      -       -      +
    155D  ALA*     3.5    22.2    +      -       -      +
    158D  ASP*     2.6    32.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 164 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     94B  PRO*     3.8    19.7    -      -       +      -
    160B  LEU      2.9    19.6    +      -       -      +
    161B  ALA      3.1     4.7    +      -       -      +
    163B  ASP*     1.3    72.2    -      -       -      +
    165B  ILE*     1.3    63.9    +      -       -      +
    166B  GLY      3.1     2.5    -      -       -      -
    168B  PRO*     3.1    28.1    -      -       -      +
    171B  TYR*     3.6    33.8    -      -       +      +
    176B  LEU*     4.2     4.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 165 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     94B  PRO*     4.7     7.4    -      -       +      -
    100B  SER*     4.3    10.8    -      -       -      +
    103B  ALA*     3.6    27.1    -      -       +      +
    104B  HIS*     4.0    21.8    -      -       +      +
    107B  ALA*     3.8    28.3    -      -       +      -
    161B  ALA      2.9    20.4    +      -       -      +
    162B  LEU*     3.4    22.4    -      -       +      +
    164B  ALA*     1.3    72.8    -      -       -      +
    166B  GLY*     1.3    62.6    +      -       -      +
    168B  PRO*     4.1     9.0    -      -       -      +
    110D  ALA      4.6     8.1    -      -       -      +
    111D  VAL*     4.7     3.4    -      -       -      -
    114D  ALA*     3.5    35.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 166 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    162B  LEU      3.8     2.1    +      -       -      -
    163B  ASP      3.6     5.0    +      -       -      -
    164B  ALA      3.1     0.4    -      -       -      -
    165B  ILE*     1.3    83.3    -      -       -      +
    167B  SER*     1.3    60.8    +      -       -      +
    168B  PRO*     2.8    15.9    -      -       -      +
    110D  ALA      4.6     2.2    -      -       -      -
    113D  ALA*     3.9    28.7    -      -       -      +
    114D  ALA      4.3     0.2    -      -       -      -
    120D  ALA*     3.4    22.6    -      -       -      +
    123D  ARG*     5.6     4.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with SER 167 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    163B  ASP      3.2    12.9    +      -       -      -
    164B  ALA      3.4     4.3    -      -       -      +
    166B  GLY*     1.3    77.6    -      -       -      +
    168B  PRO*     1.4    63.9    -      -       -      +
    169B  ALA*     3.2     3.4    -      -       -      -
    170B  LEU*     3.1    19.0    +      -       -      -
    171B  TYR*     3.0    27.4    +      -       -      +
    120D  ALA      4.0     2.4    +      -       -      -
    123D  ARG*     4.4     2.8    -      -       -      +
    124D  ARG*     3.5    39.1    +      -       -      +
    127D  LEU*     4.1     6.6    -      -       -      +
----------------------------------------------------------
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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