Contacts of the helix formed by residues 139 - 165 (chain B) in PDB entry 4O46


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 THR 139 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    137B  VAL      4.1     6.3    +      -       -      +
    138B  ALA*     1.3    79.7    -      -       -      +
    140B  GLY*     1.3    68.6    +      -       -      +
    141B  GLU      3.6     0.2    +      -       -      -
    142B  LYS*     3.4    12.9    +      -       -      +
    143B  ARG*     3.2    16.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 140 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    139B  THR*     1.3    74.5    -      -       -      +
    141B  GLU*     1.3    62.5    +      -       -      -
    143B  ARG*     3.3     6.8    +      -       -      +
    144B  ALA*     3.3    18.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 141 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     32A  GLU      4.1     2.0    -      -       -      +
     33A  LEU*     3.6    25.1    -      -       +      +
     34A  ASN*     3.4    32.5    +      -       +      +
    140B  GLY*     1.3    70.2    -      -       -      -
    142B  LYS*     1.3    62.6    +      -       -      +
    144B  ALA*     3.3    18.0    +      -       -      +
    145B  THR*     2.9    29.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 142 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     28A  LYS*     5.4     0.8    -      -       -      +
     32A  GLU*     3.2    55.2    +      -       +      +
    107A  TYR*     3.5    20.6    +      -       -      +
     94B  GLU*     3.0    39.0    +      -       -      -
    134B  LEU*     6.0     2.7    -      -       -      -
    138B  ALA*     4.2    17.9    -      -       +      +
    139B  THR      3.4    10.3    +      -       -      +
    140B  GLY      3.3     0.2    -      -       -      -
    141B  GLU*     1.3    76.6    -      -       -      +
    143B  ARG*     1.4    61.8    +      -       -      +
    145B  THR*     3.5     5.2    +      -       -      -
    146B  VAL*     3.3    26.8    +      -       +      +
----------------------------------------------------------
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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
----------------------------------------------------------
    135B  ALA*     3.7    18.2    +      -       -      +
    138B  ALA*     3.4    29.5    +      -       +      +
    139B  THR*     3.2    20.5    +      -       -      +
    140B  GLY      3.4    10.5    -      -       -      +
    142B  LYS*     1.4    72.8    -      -       -      +
    144B  ALA*     1.3    65.3    +      -       -      +
    145B  THR      3.2     0.2    +      -       -      -
    146B  VAL*     3.3     3.7    -      -       -      +
    147B  VAL*     3.0    51.6    +      -       +      +
    185B  GLU      4.8     1.2    +      -       -      -
    186B  ILE*     2.8    47.3    +      -       -      +
    187B  GLN*     5.8     0.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 144 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     34A  ASN*     6.2     0.2    -      -       -      +
    140B  GLY      3.3    10.1    +      -       -      +
    141B  GLU*     3.3    26.7    +      -       -      +
    143B  ARG*     1.3    78.5    -      -       -      +
    145B  THR*     1.4    57.0    +      -       -      +
    147B  VAL*     3.6     6.6    +      -       -      +
    148B  GLU*     3.1    30.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 145 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     34A  ASN*     3.8    16.6    +      -       -      +
    106A  ASN*     4.0    22.0    -      -       +      +
    107A  TYR*     3.7    32.4    -      -       +      -
    110A  LYS*     5.0     7.9    -      -       +      -
    141B  GLU      2.9    13.1    +      -       -      -
    142B  LYS      3.5     9.0    -      -       -      -
    143B  ARG      3.2     0.2    -      -       -      -
    144B  ALA*     1.4    73.8    -      -       -      +
    146B  VAL*     1.3    63.3    +      -       +      +
    148B  GLU*     3.3    13.8    +      -       -      +
    149B  SER*     3.1    33.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 146 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    107A  TYR*     5.2     4.3    -      -       +      +
    131B  TYR*     3.6    35.4    -      -       +      +
    134B  LEU*     3.9    20.2    -      -       +      -
    135B  ALA*     3.7    27.4    -      -       -      +
    138B  ALA*     4.2     3.6    -      -       +      -
    142B  LYS*     3.4    17.0    -      -       +      +
    143B  ARG*     3.3    16.4    -      -       -      +
    145B  THR*     1.3    75.9    -      -       +      +
    147B  VAL*     1.4    58.7    +      -       -      +
    149B  SER*     3.4     7.1    +      -       -      -
    150B  SER*     2.9    29.5    +      -       -      -
----------------------------------------------------------
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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
----------------------------------------------------------
    135B  ALA*     3.8    12.3    -      -       +      -
    143B  ARG*     3.0    43.4    +      -       +      +
    144B  ALA*     3.9     6.1    -      -       -      +
    146B  VAL*     1.4    70.6    -      -       -      +
    148B  GLU*     1.3    61.2    +      -       -      +
    150B  SER*     3.4     5.8    +      -       -      -
    151B  GLU*     3.0    28.8    +      -       -      +
    182B  PHE*     3.5     9.1    -      -       +      -
    186B  ILE*     3.6    23.1    -      -       +      -
    187B  GLN*     3.2    33.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 148 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    110A  LYS*     5.3     8.8    -      -       -      +
    144B  ALA      3.1    14.5    +      -       -      +
    145B  THR*     3.4    15.3    -      -       -      +
    147B  VAL*     1.3    76.1    -      -       -      +
    149B  SER*     1.4    54.9    +      -       -      +
    151B  GLU*     3.4     7.1    +      -       -      +
    152B  LYS*     3.0    30.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 149 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    106A  ASN*     5.2     4.9    +      -       -      +
    127B  LYS*     5.5     1.6    -      -       -      -
    131B  TYR*     3.6    40.3    +      -       -      -
    145B  THR*     3.1    18.7    +      -       -      +
    146B  VAL      3.5     8.1    -      -       -      -
    147B  VAL      3.3     0.2    -      -       -      -
    148B  GLU*     1.4    76.1    -      -       -      +
    150B  SER*     1.4    55.3    +      -       -      +
    152B  LYS*     3.4     9.3    +      -       -      +
    153B  ALA*     3.1    28.6    +      -       -      +
----------------------------------------------------------
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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
----------------------------------------------------------
    128B  GLY*     2.8    27.7    +      -       -      -
    131B  TYR*     3.7    13.2    -      -       -      +
    132B  ARG*     3.8     6.3    +      -       -      -
    146B  VAL      2.9    18.1    +      -       -      -
    147B  VAL*     3.6     6.1    -      -       -      -
    149B  SER*     1.4    71.0    -      -       -      +
    151B  GLU*     1.4    60.1    +      -       -      +
    153B  ALA*     3.3     2.8    +      -       -      +
    154B  TYR*     3.0    48.5    +      -       -      -
    182B  PHE*     3.4    17.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 151 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    147B  VAL      3.0    17.3    +      -       -      +
    148B  GLU*     3.6     6.7    -      -       -      +
    150B  SER*     1.4    74.3    -      -       -      +
    152B  LYS*     1.4    56.1    +      -       -      +
    154B  TYR*     3.3     3.6    +      -       -      +
    155B  SER*     2.8    45.2    +      -       -      -
    179B  TYR*     2.7    25.7    +      -       -      -
    182B  PHE*     3.7    18.9    -      -       +      -
    183B  TYR*     3.9    14.3    +      -       -      -
    187B  GLN*     3.2    23.5    +      -       -      +
----------------------------------------------------------
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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
----------------------------------------------------------
    148B  GLU*     3.0    18.3    +      -       +      +
    149B  SER*     3.6     9.0    -      -       -      +
    151B  GLU*     1.4    77.2    -      -       -      +
    153B  ALA*     1.3    61.1    +      -       -      +
    155B  SER*     4.0     4.5    -      -       -      -
    156B  GLU*     3.2    28.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 153 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    124B  LEU*     3.4    35.3    -      -       +      +
    127B  LYS*     3.8    20.4    -      -       +      -
    128B  GLY*     3.5    15.3    -      -       -      +
    149B  SER      3.1    16.6    +      -       -      +
    150B  SER      3.7     2.7    -      -       -      +
    151B  GLU      3.3     0.2    -      -       -      -
    152B  LYS*     1.3    73.5    -      -       -      +
    154B  TYR*     1.3    63.8    +      -       -      +
    156B  GLU*     3.5     2.5    +      -       -      +
    157B  ALA*     3.1    23.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 154 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    125B  LYS*     3.6    21.8    -      -       +      -
    128B  GLY*     3.3    11.0    -      -       -      -
    129B  ASP*     2.6    28.3    +      -       -      -
    132B  ARG*     2.9    20.3    +      -       -      -
    150B  SER*     3.0    41.0    +      -       -      +
    151B  GLU      3.9     0.9    -      -       -      +
    153B  ALA*     1.3    74.5    -      -       -      +
    155B  SER*     1.4    52.5    +      -       -      +
    157B  ALA*     3.3     4.4    +      -       -      +
    158B  HIS*     2.8    35.0    +      -       -      +
    175B  LEU*     3.7    24.3    -      -       +      +
    178B  ASN*     3.9    16.6    -      -       +      +
    179B  TYR*     3.5    38.2    -      +       +      -
    182B  PHE*     3.7    23.3    -      +       +      -
----------------------------------------------------------
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Residues in contact with SER 155 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    151B  GLU*     2.8    31.1    +      -       -      -
    152B  LYS*     4.0     5.4    -      -       -      -
    154B  TYR*     1.4    71.5    -      -       -      +
    156B  GLU*     1.4    61.1    +      -       -      +
    158B  HIS*     3.4     3.5    +      -       -      +
    159B  GLU*     3.1    30.6    +      -       -      +
    179B  TYR*     3.8    19.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 156 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    109B  ILE*     6.1     0.5    -      -       -      +
    120B  LYS*     5.4     3.6    -      -       -      +
    124B  LEU*     3.5    32.7    -      -       +      +
    152B  LYS*     3.2    20.0    +      -       -      +
    153B  ALA      3.8     3.6    -      -       -      +
    155B  SER*     1.4    77.1    -      -       -      +
    157B  ALA*     1.4    62.8    +      -       -      +
    159B  GLU*     3.3     7.5    +      -       -      +
    160B  ILE*     3.2    37.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 157 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121B  VAL*     3.7    22.5    -      -       +      +
    124B  LEU*     3.7    23.2    -      -       +      +
    125B  LYS      4.2     2.2    -      -       -      +
    153B  ALA      3.1    13.5    +      -       -      +
    154B  TYR      3.5     7.6    -      -       -      +
    156B  GLU*     1.4    74.5    -      -       -      +
    158B  HIS*     1.4    57.0    +      -       -      +
    160B  ILE*     3.5     0.4    +      -       -      -
    161B  SER*     3.0    31.7    +      -       -      -
    175B  LEU*     3.5    23.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with HIS 158 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    154B  TYR      2.8    17.4    +      -       -      +
    155B  SER*     3.6     5.6    -      -       -      +
    157B  ALA*     1.4    73.7    -      -       -      +
    159B  GLU*     1.3    64.5    +      -       -      +
    161B  SER*     3.1     7.8    +      -       -      -
    162B  LYS*     3.1    59.4    +      -       +      +
    172B  ARG*     6.0     2.8    +      -       +      -
    175B  LEU*     3.5    14.3    -      -       +      +
    176B  ALA*     5.4     6.6    -      -       +      +
    179B  TYR*     4.0    22.3    -      +       +      -
    196B  LEU*     3.4    31.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 159 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    155B  SER*     3.1    19.7    +      -       -      +
    156B  GLU*     3.3    10.5    +      -       -      +
    158B  HIS*     1.3    83.5    +      -       -      +
    160B  ILE*     1.4    61.3    +      -       +      +
    162B  LYS*     3.9    18.3    -      -       -      +
    163B  GLU*     3.3    26.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 160 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    117B  TYR*     4.0    22.9    -      -       +      +
    120B  LYS*     4.0    22.2    -      -       +      -
    121B  VAL*     3.7    19.1    -      -       +      -
    124B  LEU*     3.8    25.4    -      -       +      -
    156B  GLU*     3.2    26.5    +      -       +      +
    157B  ALA*     4.7     0.9    -      -       -      -
    159B  GLU*     1.4    74.0    -      -       +      +
    161B  SER*     1.4    54.6    +      -       -      +
    163B  GLU*     3.2     3.1    +      -       -      -
    164B  HIS*     2.9    53.7    +      -       +      +
    165B  MET*     6.0     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with SER 161 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121B  VAL*     3.8    10.0    -      -       -      +
    157B  ALA      3.0    15.5    +      -       -      -
    158B  HIS*     3.1    14.6    +      -       -      -
    160B  ILE*     1.4    75.1    -      -       -      +
    162B  LYS*     1.3    58.9    +      -       -      +
    165B  MET*     2.9    58.1    +      -       -      +
    172B  ARG*     3.6    27.4    +      -       -      +
    175B  LEU*     3.6    11.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 162 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    158B  HIS*     3.1    48.7    +      -       +      +
    159B  GLU*     3.9    15.9    -      -       -      +
    160B  ILE      3.3     0.2    -      -       -      -
    161B  SER*     1.3    82.9    +      -       -      +
    163B  GLU*     1.3    60.1    +      -       -      +
    165B  MET      4.2     2.1    -      -       -      +
    172B  ARG*     4.0    32.5    +      -       -      +
----------------------------------------------------------
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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
----------------------------------------------------------
    159B  GLU      3.3    16.4    +      -       -      +
    160B  ILE*     3.2     4.9    +      -       -      +
    162B  LYS*     1.3    80.6    -      -       -      +
    164B  HIS*     1.3    90.7    +      -       +      +
    165B  MET      3.8     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with HIS 164 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    117B  TYR*     3.3    72.5    +      +       +      +
    160B  ILE*     2.9    28.3    +      -       +      +
    163B  GLU*     1.3   110.4    +      -       +      +
    165B  MET*     1.3    63.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with MET 165 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    117B  TYR*     4.8     5.4    -      -       +      +
    118B  GLU*     3.8    22.9    -      -       +      -
    121B  VAL*     3.8    29.8    -      -       -      -
    160B  ILE      5.0     0.2    -      -       -      +
    161B  SER*     2.9    26.0    +      -       -      +
    162B  LYS      4.2     3.6    -      -       -      +
    163B  GLU      5.2     0.2    -      -       -      -
    164B  HIS*     1.3    87.4    -      -       +      +
    166B  GLN*     1.3    61.7    +      -       -      +
    167B  PRO*     4.3     0.2    -      -       -      +
    169B  HIS*     3.4    45.1    -      -       +      +
    171B  ILE*     3.7    18.4    -      -       +      -
    172B  ARG*     2.8    33.4    +      -       -      +
----------------------------------------------------------
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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