Contacts of the helix formed by residues 149 - 173 (chain A) in PDB entry 3CJD


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 149 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    147A  GLU      3.7     1.6    +      -       -      +
    148A  SER*     1.3    76.6    -      -       -      +
    150A  ASP*     1.3    61.9    +      -       -      +
    151A  ALA*     3.4    11.2    +      -       -      +
    152A  GLU*     2.8    47.3    +      -       -      +
    153A  LEU*     2.8    27.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 150 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    138A  THR*     5.8     0.2    -      -       -      +
    149A  ASP*     1.3    76.7    -      -       -      +
    151A  ALA*     1.3    52.7    -      -       -      +
    153A  LEU*     3.3    16.6    +      -       -      +
    154A  ASP*     2.7    36.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 151 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    149A  ASP*     3.4    11.2    +      -       -      +
    150A  ASP*     1.3    75.7    -      -       -      +
    152A  GLU*     1.3    56.8    +      -       +      +
    154A  ASP*     3.3     7.5    +      -       -      +
    155A  LEU*     2.9    41.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 152 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    147A  GLU      4.2     2.8    -      -       -      +
    148A  SER*     3.4    20.4    -      -       -      +
    149A  ASP*     2.8    50.0    +      -       -      +
    151A  ALA*     1.3    77.7    -      -       +      +
    153A  LEU*     1.3    55.9    +      -       -      +
    155A  LEU*     3.5    10.1    +      -       +      +
    156A  MSE      3.0    29.7    +      -       -      +
    187B  MSE      5.2     1.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 153 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    138A  THR*     3.9    18.8    -      -       +      +
    141A  LEU*     3.7    40.4    -      -       +      +
    142A  ALA*     3.8    22.0    -      -       +      +
    145A  PHE*     4.2     4.9    -      -       +      +
    148A  SER*     3.9    29.8    -      -       -      +
    149A  ASP      2.8    23.0    +      -       -      +
    150A  ASP*     3.7    18.6    -      -       -      +
    152A  GLU*     1.3    68.9    -      -       -      +
    154A  ASP*     1.3    56.1    +      -       -      +
    156A  MSE      3.3     5.9    +      -       +      +
    157A  THR*     2.7    37.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 154 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    134A  PHE*     5.3     4.2    -      -       -      -
    138A  THR*     5.0     3.7    -      -       -      +
    150A  ASP      2.7    21.5    +      -       -      +
    151A  ALA*     3.5     8.4    -      -       -      +
    153A  LEU*     1.3    69.1    -      -       -      +
    155A  LEU*     1.3    70.5    +      -       -      +
    157A  THR*     3.3     7.6    +      -       -      -
    158A  ARG*     3.1    57.9    +      -       -      +
    180B  PRO*     5.8     1.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 155 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    151A  ALA*     2.9    25.7    +      -       +      +
    152A  GLU*     3.7     9.2    -      -       +      +
    154A  ASP*     1.3    82.1    -      -       -      +
    156A  MSE      1.3    51.7    +      -       -      +
    158A  ARG*     3.4     6.6    +      -       -      +
    159A  THR*     2.7    36.2    +      -       -      -
    179B  VAL*     4.3     0.8    -      -       +      +
    180B  PRO*     3.9    20.0    -      -       +      -
    183B  GLN*     3.2    54.5    -      -       +      +
    186B  THR*     5.3     2.9    -      -       +      -
    187B  MSE      3.6    28.0    -      -       +      +
    190B  LEU*     5.9     1.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with MSE 156 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    141A  LEU*     4.0    26.5    -      -       +      -
    145A  PHE*     4.1    17.3    -      -       +      -
    152A  GLU      3.0    17.3    +      -       -      +
    153A  LEU*     3.8     7.2    -      -       +      +
    154A  ASP      3.3     0.2    -      -       -      -
    155A  LEU*     1.3    73.4    -      -       -      +
    157A  THR*     1.3    60.5    +      -       -      +
    159A  THR*     3.6     7.0    -      -       -      -
    160A  LEU*     3.0    49.5    +      -       +      +
    187B  MSE      3.9    24.6    -      -       +      +
    190B  LEU*     3.9    18.8    -      -       +      +
    191B  LEU*     5.4     0.9    -      -       -      -
    194B  GLN*     3.6    31.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 157 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    134A  PHE*     3.5    36.8    -      -       +      +
    137A  ILE*     3.7    19.9    -      -       +      +
    138A  THR*     2.7    29.1    +      -       -      +
    141A  LEU*     3.5    17.1    -      -       -      +
    153A  LEU      2.7    18.6    +      -       -      -
    154A  ASP*     3.5    10.5    -      -       -      -
    156A  MSE      1.3    75.6    -      -       -      +
    158A  ARG*     1.3    56.4    +      -       -      +
    160A  LEU*     3.9     0.7    -      -       -      +
    161A  PHE*     2.9    30.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 158 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    130A  MSE      4.6     7.3    -      -       -      +
    134A  PHE*     3.8    23.2    -      -       +      -
    154A  ASP*     3.1    44.7    +      -       -      +
    155A  LEU*     3.7     6.7    -      -       -      +
    157A  THR*     1.3    74.8    -      -       -      +
    159A  THR*     1.3    49.8    +      -       -      +
    161A  PHE*     3.9     0.7    -      -       -      +
    162A  SER*     2.7    40.7    +      -       -      -
    176B  ILE      3.0    28.7    +      -       -      -
    177B  SER*     3.5    10.0    -      -       -      +
    178B  GLY      3.0    23.2    +      -       -      -
    179B  VAL*     3.6    19.3    -      -       +      +
    180B  PRO*     4.2    15.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 159 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    155A  LEU      2.7    22.2    +      -       -      -
    156A  MSE      3.6    11.0    -      -       -      -
    157A  THR      3.3     0.2    -      -       -      -
    158A  ARG*     1.3    75.7    -      -       -      +
    160A  LEU*     1.3    58.6    +      -       -      +
    162A  SER*     3.4     3.7    +      -       -      -
    163A  SER*     2.9    32.6    +      -       -      -
    167B  ILE*     3.8    16.9    -      -       +      +
    179B  VAL*     3.6     8.1    -      -       -      +
    187B  MSE      3.1    53.4    -      -       +      +
    191B  LEU*     4.0    17.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 160 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     90A  LEU*     4.5     8.5    -      -       +      -
    137A  ILE*     5.3     0.2    -      -       +      -
    141A  LEU*     3.6    33.7    -      -       +      -
    156A  MSE      3.0    30.7    +      -       +      +
    157A  THR*     4.3     1.8    -      -       -      +
    159A  THR*     1.3    77.1    -      -       -      +
    161A  PHE*     1.3    66.1    +      -       -      +
    163A  SER*     3.4     5.7    +      -       -      +
    164A  VAL*     3.0    28.2    +      -       -      +
    191A  LEU*     5.8     1.6    -      -       +      -
    192A  LEU*     4.5     7.2    -      -       +      -
    195A  VAL*     3.9    33.9    -      -       +      -
    203A  STE      3.4    18.6    -      -       +      -
    191B  LEU*     3.9    26.2    -      -       +      -
    194B  GLN*     5.3     1.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 161 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     97A  TYR*     3.5    45.3    -      +       -      -
    112A  PHE*     3.9     6.1    -      +       -      -
    134A  PHE*     3.7    24.9    -      +       +      -
    137A  ILE*     3.9     7.0    -      -       +      -
    157A  THR      2.9    19.7    +      -       -      +
    158A  ARG      3.9     1.8    -      -       -      +
    160A  LEU*     1.3    76.3    -      -       -      +
    162A  SER*     1.3    64.4    +      -       -      +
    164A  VAL*     3.2     2.9    +      -       +      -
    165A  HIS*     3.0    23.8    +      -       +      +
    203A  STE      3.7    57.2    -      -       +      +
    170B  LEU*     3.9    13.9    -      -       +      -
    177B  SER*     3.8    29.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with SER 162 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    158A  ARG      2.7    29.6    +      -       -      -
    159A  THR*     3.7     3.8    -      -       -      -
    161A  PHE*     1.3    73.2    -      -       -      +
    163A  SER*     1.3    59.7    +      -       -      +
    165A  HIS*     3.5     2.1    +      -       -      +
    166A  GLY      3.1    17.7    +      -       -      -
    166B  GLY*     3.3    19.2    -      -       -      -
    167B  ILE*     3.6    26.5    +      -       -      -
    170B  LEU*     3.7    22.3    -      -       -      +
    177B  SER      4.0     7.4    +      -       -      -
    178B  GLY*     4.0     8.3    -      -       -      -
    179B  VAL*     4.2     3.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 163 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    159A  THR      2.9    23.2    +      -       -      -
    160A  LEU*     3.5     8.7    -      -       -      -
    162A  SER*     1.3    73.3    -      -       -      +
    164A  VAL*     1.3    64.9    +      -       -      +
    166A  GLY      3.3     1.6    +      -       -      -
    167A  ILE*     3.2    26.8    +      -       -      +
    191A  LEU*     4.2    11.0    -      -       -      -
    163B  SER*     3.5    31.6    +      -       -      +
    167B  ILE*     3.8     1.0    -      -       -      +
    191B  LEU*     3.4    31.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 164 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     94A  SER*     3.6    39.7    -      -       -      +
     97A  TYR*     4.3    12.8    -      -       +      -
    160A  LEU      3.0    21.7    +      -       -      +
    161A  PHE*     3.9     3.6    -      -       +      +
    163A  SER*     1.3    71.3    -      -       -      +
    165A  HIS*     1.3    60.1    +      -       -      +
    167A  ILE*     3.2     9.1    +      -       -      +
    168A  VAL*     2.9    41.8    +      -       +      +
    188A  ILE*     4.5    11.4    -      -       +      -
    191A  LEU*     4.8     5.8    -      -       +      -
    192A  LEU*     4.2    13.9    -      -       +      -
    203A  STE      4.1    15.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with HIS 165 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     97A  TYR*     2.7    32.5    +      -       -      +
    108A  TRP*     3.6    19.1    -      +       -      -
    109A  ARG*     6.5     0.2    -      -       -      -
    112A  PHE*     3.3    41.5    -      +       -      +
    161A  PHE*     3.0    21.3    +      -       +      +
    162A  SER      3.6     4.5    -      -       -      +
    164A  VAL*     1.3    78.0    -      -       -      +
    166A  GLY*     1.3    52.7    +      -       -      +
    168A  VAL*     3.4     0.6    +      -       -      +
    169A  LEU*     2.7    60.9    +      -       +      +
    166B  GLY*     5.3     1.1    -      -       -      -
    169B  LEU*     5.2     2.9    -      -       +      +
    170B  LEU*     3.7    35.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 166 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    162A  SER      3.1    10.3    +      -       -      -
    163A  SER      3.3     1.3    +      -       -      -
    164A  VAL      3.2     0.2    -      -       -      -
    165A  HIS*     1.3    74.6    -      -       -      +
    167A  ILE*     1.3    65.1    +      -       -      +
    169A  LEU*     4.5     4.3    -      -       -      -
    170A  LEU*     3.1    33.1    +      -       -      +
    162B  SER*     3.3    24.1    -      -       -      -
    165B  HIS*     5.3     2.7    -      -       -      -
    166B  GLY*     3.8    13.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 167 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    163A  SER      3.2    10.8    +      -       -      +
    164A  VAL*     3.2    11.4    +      -       -      +
    166A  GLY*     1.3    77.4    -      -       -      +
    168A  VAL*     1.3    56.8    +      -       -      +
    170A  LEU*     4.4     0.5    -      -       -      +
    171A  GLY      3.1    22.3    +      -       -      -
    179A  VAL*     4.5    12.3    +      -       +      -
    184A  LEU*     3.4    27.7    -      -       +      +
    187A  MSE      5.2     1.3    -      -       +      -
    188A  ILE*     4.0    29.8    -      -       +      +
    191A  LEU*     3.4    33.9    -      -       +      -
    159B  THR*     3.7    30.7    -      -       +      +
    162B  SER*     3.7    10.4    +      -       -      -
    163B  SER*     3.5     5.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 168 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     97A  TYR*     4.1    15.0    -      -       +      -
     98A  LEU*     4.0    27.8    -      -       +      -
    101A  ALA*     3.7    17.0    -      -       +      -
    108A  TRP*     4.0     9.4    -      -       +      -
    164A  VAL*     2.9    34.1    +      -       +      +
    165A  HIS      3.8     3.6    -      -       -      +
    167A  ILE*     1.3    75.2    -      -       +      +
    169A  LEU*     1.3    58.9    +      -       -      +
    172A  LEU*     2.9    55.4    +      -       +      +
    184A  LEU*     4.9     2.0    -      -       -      -
    188A  ILE*     4.3     7.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 169 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108A  TRP*     4.0    23.1    -      -       +      -
    109A  ARG*     4.4    15.7    -      -       -      +
    165A  HIS*     2.7    39.0    +      -       +      +
    166A  GLY*     4.0     3.6    -      -       -      +
    167A  ILE      3.4     0.2    -      -       -      -
    168A  VAL*     1.3    72.2    -      -       -      +
    170A  LEU*     1.3    61.4    +      -       +      +
    172A  LEU*     4.0     0.7    -      -       -      +
    173A  GLU*     3.0    67.1    +      -       +      +
    165B  HIS*     5.1     6.3    -      -       +      +
    169B  LEU*     3.4    33.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 170 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    166A  GLY      3.1    13.2    +      -       -      +
    169A  LEU*     1.3    79.0    -      -       +      +
    171A  GLY*     1.3    61.6    +      -       -      +
    173A  GLU*     4.2     7.2    -      -       -      +
    174A  ASN*     3.4     2.3    +      -       -      -
    175A  ARG*     3.2    47.6    +      -       +      +
    177A  SER*     3.7    15.3    -      -       -      +
    178A  GLY*     3.7    19.5    -      -       -      +
    112B  PHE*     3.8    21.5    -      -       +      -
    161B  PHE*     3.9    16.6    -      -       +      -
    162B  SER*     3.7    24.2    -      -       -      +
    165B  HIS*     3.8    27.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 171 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    167A  ILE      3.1    18.4    +      -       -      -
    170A  LEU*     1.3    77.0    -      -       -      +
    172A  LEU*     1.3    57.4    +      -       -      +
    174A  ASN*     3.1    28.6    +      -       -      -
    178A  GLY*     4.3     0.6    -      -       -      -
    179A  VAL      3.4    26.5    -      -       -      +
    181A  GLY*     4.9     2.8    +      -       -      -
    184A  LEU*     3.8    14.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 172 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98A  LEU*     4.0     4.3    -      -       +      -
    101A  ALA*     3.4    43.5    -      -       +      +
    102A  ARG*     3.5    47.8    -      -       +      +
    108A  TRP*     4.3    11.2    -      -       +      -
    168A  VAL*     2.9    30.0    +      -       +      +
    169A  LEU      4.4     1.1    -      -       -      +
    171A  GLY*     1.3    74.9    -      -       -      +
    173A  GLU*     1.3    60.8    +      -       +      +
    174A  ASN*     3.2     5.6    +      -       -      +
    184A  LEU*     3.7    11.7    -      -       +      -
    117B  ARG*     3.6    12.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 173 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108A  TRP*     6.2     1.3    -      -       +      -
    109A  ARG*     3.0    36.2    +      -       -      +
    169A  LEU*     3.0    43.8    +      -       +      +
    170A  LEU*     4.2     4.7    -      -       -      +
    171A  GLY      3.4     0.2    -      -       -      -
    172A  LEU*     1.3    75.4    -      -       +      +
    174A  ASN*     1.3    64.2    +      -       -      +
    175A  ARG*     3.4    35.7    +      -       +      +
    112B  PHE*     5.0     5.1    -      -       -      +
    117B  ARG*     3.1    28.5    +      -       -      +
----------------------------------------------------------
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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