Contacts of the helix formed by residues 159 - 183 (chain B) in PDB entry 2PY5


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 159 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    150B  LYS*     4.2     9.2    -      -       -      +
    156B  TYR*     3.6    13.7    -      -       +      +
    157B  LYS      4.3     3.8    -      -       -      +
    158B  ILE*     1.3    74.8    -      -       -      +
    160B  PRO*     1.3    75.4    -      -       +      +
    161B  GLU*     3.5    14.0    +      -       -      +
    162B  GLU*     2.7    45.2    +      -       -      +
    163B  TYR*     2.9    22.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with PRO 160 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    158B  ILE      4.5     0.9    -      -       -      +
    159B  THR*     1.3    87.1    -      -       +      +
    161B  GLU*     1.3    65.5    +      -       -      +
    163B  TYR*     3.3     9.1    +      -       +      +
    164B  ALA*     2.8    35.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 161 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    145B  ASP      5.7     0.2    -      -       -      +
    159B  THR*     3.2    20.3    -      -       -      +
    160B  PRO*     1.3    91.8    -      -       -      +
    162B  GLU*     1.3    57.6    +      -       +      +
    164B  ALA*     3.4     7.7    +      -       -      +
    165B  TYR*     3.0    27.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 162 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     25B  TRP*     3.9    16.8    -      -       +      -
    146B  ILE*     4.0    21.3    -      -       +      -
    150B  LYS*     3.6     7.3    +      -       -      +
    152B  ARG*     3.0    19.1    +      -       -      -
    156B  TYR*     2.7    32.5    +      -       -      -
    158B  ILE*     3.5    12.1    -      -       +      +
    159B  THR*     2.7    43.0    +      -       -      +
    161B  GLU*     1.3    73.7    -      -       +      +
    163B  TYR*     1.3    59.7    +      -       -      +
    165B  TYR*     3.2     7.5    +      -       -      +
    166B  ILE*     2.9    36.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 163 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     38B  TYR*     3.3    33.2    +      +       -      -
     39B  LYS*     5.5     0.3    -      -       -      -
     40B  ILE*     3.4    52.1    +      -       +      +
    158B  ILE*     3.6    13.6    -      -       +      +
    159B  THR      2.9    13.1    +      -       -      +
    160B  PRO*     3.4    13.0    -      -       +      +
    162B  GLU*     1.3    77.1    -      -       -      +
    164B  ALA*     1.3    58.4    +      -       -      +
    166B  ILE*     3.4     3.3    +      -       -      -
    167B  LYS*     2.9    39.2    +      -       +      +
----------------------------------------------------------
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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
----------------------------------------------------------
    160B  PRO      2.8    16.9    +      -       -      +
    161B  GLU*     3.6     8.3    -      -       -      +
    162B  GLU      3.3     0.2    -      -       -      -
    163B  TYR*     1.3    79.0    -      -       -      +
    165B  TYR*     1.3    56.3    +      -       -      +
    167B  LYS*     3.5     5.8    +      -       -      +
    168B  ASN*     2.9    38.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 165 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     14B  GLU*     3.3    25.6    -      -       -      -
    143B  LYS*     3.0    27.2    +      -       +      -
    144B  GLY*     3.6    41.5    -      -       -      -
    145B  ASP*     3.7    20.4    +      -       -      +
    146B  ILE*     3.4    40.7    -      -       +      +
    148B  TYR*     4.1     9.7    +      -       -      -
    161B  GLU      3.0    14.3    +      -       -      +
    162B  GLU*     3.5     8.5    -      -       -      +
    164B  ALA*     1.3    75.8    -      -       -      +
    166B  ILE*     1.3    62.1    +      -       +      +
    168B  ASN*     3.4     6.9    +      -       +      +
    169B  ASP*     3.0    43.5    +      -       -      +
      7L    T      3.9     7.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 166 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     12B  ALA*     5.2     5.2    -      -       +      +
     14B  GLU*     3.7    27.4    -      -       +      +
     25B  TRP*     4.7     3.6    -      -       +      -
     26B  ALA*     3.5    31.6    -      -       +      -
     27B  TYR      4.5     0.7    -      -       -      -
     28B  GLY*     4.2    19.1    -      -       -      +
     40B  ILE*     3.8    30.3    -      -       +      -
    146B  ILE*     5.4     0.4    -      -       +      -
    158B  ILE*     4.4     6.3    -      -       +      -
    162B  GLU      2.9    26.4    +      -       -      +
    163B  TYR      3.7     3.1    -      -       -      +
    165B  TYR*     1.3    78.4    -      -       +      +
    167B  LYS*     1.3    65.5    +      -       -      +
    169B  ASP*     3.2     7.1    +      -       -      +
    170B  ILE*     3.1    27.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 167 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     30B  MET*     4.1    11.7    -      -       +      -
     35B  HIS      5.8     0.4    -      -       -      -
     38B  TYR*     3.1    49.2    +      -       +      +
     40B  ILE*     3.6    11.8    -      -       +      +
    163B  TYR*     2.9    26.0    +      -       +      +
    164B  ALA*     3.8     6.3    -      -       -      +
    166B  ILE*     1.3    76.4    -      -       -      +
    168B  ASN*     1.3    61.9    +      -       -      +
    170B  ILE*     3.4     7.3    -      -       -      +
    171B  GLN*     3.0    47.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 168 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    141B  VAL*     3.9    27.6    -      -       +      +
    142B  LEU      3.3    25.9    +      -       -      +
    143B  LYS*     5.6     1.3    -      -       -      -
    144B  GLY      5.3     2.7    -      -       -      +
    164B  ALA*     2.9    23.4    +      -       -      +
    165B  TYR*     3.6     7.7    -      -       +      +
    167B  LYS*     1.3    82.2    -      -       -      +
    169B  ASP*     1.3    58.5    +      -       -      +
    171B  GLN*     3.1     6.7    +      -       -      +
    172B  ILE*     2.8    38.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 169 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     12B  ALA*     5.1     7.4    -      -       +      -
     14B  GLU*     4.2     2.7    -      -       -      +
    130B  VAL*     3.9    12.9    -      -       +      +
    143B  LYS*     2.9    48.6    +      -       -      +
    165B  TYR*     3.0    33.6    +      -       -      +
    166B  ILE*     3.5    10.5    -      -       -      +
    168B  ASN*     1.3    78.7    -      -       -      +
    170B  ILE*     1.3    65.3    +      -       +      +
    172B  ILE*     3.4    13.3    +      -       -      +
    173B  ILE*     3.4    17.7    +      -       -      +
      7L    T      3.7     9.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 170 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     10B  SER*     2.8    33.2    +      -       -      +
     11B  CYS      3.8     6.3    -      -       -      +
     12B  ALA*     3.6    39.3    -      -       +      +
     28B  GLY*     3.9    10.8    -      -       -      +
     29B  TYR      3.6    36.8    -      -       -      +
     30B  MET*     3.7    15.3    -      -       +      -
     38B  TYR*     4.7     2.5    -      -       +      -
     40B  ILE*     4.7     6.5    -      -       +      -
    166B  ILE*     3.1    10.3    +      -       +      +
    167B  LYS*     3.4    18.6    -      -       -      +
    169B  ASP*     1.3    75.0    -      -       -      +
    171B  GLN*     1.3    59.7    +      -       -      +
    173B  ILE*     4.9     0.2    -      -       -      -
    174B  ALA*     2.9    18.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 171 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     30B  MET*     3.6    32.4    -      -       -      +
     35B  HIS*     4.9    12.3    +      -       -      +
    140B  THR*     3.6     9.7    +      -       -      -
    141B  VAL*     4.3    15.9    -      -       +      +
    167B  LYS*     3.0    34.5    +      -       -      +
    168B  ASN*     3.1     7.7    +      -       -      +
    170B  ILE*     1.3    75.8    -      -       -      +
    172B  ILE*     1.3    59.4    +      -       -      +
    175B  GLU*     2.8    57.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 172 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    130B  VAL*     3.8    37.9    -      -       +      +
    133B  ILE*     4.1     8.3    -      -       +      -
    134B  ALA*     3.7    22.4    -      -       +      +
    139B  LEU*     3.3    27.7    -      -       +      +
    141B  VAL*     3.7    22.0    -      -       +      +
    142B  LEU      3.9     5.6    -      -       -      -
    143B  LYS*     3.9    22.9    -      -       +      +
    168B  ASN      2.8    24.5    +      -       -      +
    169B  ASP*     3.6     5.2    -      -       -      +
    171B  GLN*     1.3    77.2    -      -       -      +
    173B  ILE*     1.3    60.4    +      -       +      +
    175B  GLU*     4.7     0.2    -      -       -      -
    176B  ALA*     3.0    25.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 173 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     10B  SER*     3.4    20.2    -      -       -      +
     59B  TYR*     5.1     2.2    -      -       +      +
     61B  HIS*     3.5    31.9    -      -       +      +
    122B  SER*     3.7    16.2    -      -       -      +
    126B  LEU*     4.5     5.4    -      -       +      -
    130B  VAL*     4.1    16.8    -      -       +      -
    133B  ILE*     3.7    23.8    -      -       +      -
    169B  ASP      3.4    11.9    +      -       -      +
    170B  ILE*     4.0     0.9    -      -       -      +
    171B  GLN      3.3     0.4    -      -       -      -
    172B  ILE*     1.3    77.9    -      -       +      +
    174B  ALA*     1.3    60.2    +      -       -      +
    176B  ALA*     3.9     1.7    -      -       -      +
    177B  LEU*     2.9    52.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 174 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     10B  SER*     3.6    15.3    +      -       -      -
     30B  MET*     4.1     7.9    -      -       +      -
     32B  ILE*     3.7    17.8    -      -       -      +
     35B  HIS*     3.5    25.6    +      -       +      +
    170B  ILE      2.9    19.4    +      -       -      +
    171B  GLN*     3.6     8.7    -      -       -      +
    173B  ILE*     1.3    76.5    -      -       -      +
    175B  GLU*     1.3    60.7    +      -       -      +
    178B  LEU*     3.1    26.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 175 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     35B  HIS*     3.6    26.0    +      -       +      +
    139B  LEU*     3.5    19.6    -      -       +      +
    140B  THR*     2.6    54.7    +      -       -      +
    141B  VAL*     4.7     2.9    -      -       -      -
    171B  GLN*     2.8    44.0    +      -       +      +
    172B  ILE      3.8     3.4    -      -       -      +
    174B  ALA*     1.3    72.0    -      -       -      +
    176B  ALA*     1.3    63.5    +      -       -      +
    178B  LEU*     3.5     2.1    +      -       -      +
    179B  ILE*     3.2    32.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 176 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    126B  LEU*     3.6    25.5    -      -       +      +
    133B  ILE*     3.7    20.2    -      -       +      -
    137B  PHE*     4.0    20.3    -      -       +      -
    139B  LEU*     4.1     4.2    -      -       +      +
    172B  ILE      3.0    17.2    +      -       -      +
    173B  ILE*     3.9     1.8    -      -       -      +
    175B  GLU*     1.3    73.1    -      -       -      +
    177B  LEU*     1.3    65.3    -      -       -      +
    179B  ILE*     3.4     6.3    +      -       -      +
    180B  GLN*     3.0    22.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 177 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     32B  ILE*     3.7    31.0    -      -       +      -
     59B  TYR*     3.9    22.2    -      -       +      -
    122B  SER*     4.2     4.5    -      -       -      -
    125B  LYS*     3.9    22.7    -      -       +      -
    126B  LEU*     3.7    16.4    -      -       +      -
    173B  ILE*     2.9    37.4    +      -       +      +
    174B  ALA      4.2     2.0    -      -       -      +
    176B  ALA*     1.3    73.3    -      -       -      +
    178B  LEU*     1.3    56.5    +      -       -      +
    180B  GLN*     3.1    22.7    +      -       -      +
    181B  PHE*     2.7    51.1    +      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 178 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8B  MET*     5.9     0.9    -      -       +      -
     32B  ILE*     3.4    29.3    -      -       +      +
     33B  GLU*     4.4    17.9    -      -       +      -
     35B  HIS*     3.8     8.3    -      -       +      +
    174B  ALA      3.1    19.6    +      -       -      +
    175B  GLU      3.8     4.0    -      -       -      +
    176B  ALA      3.3     0.2    -      -       -      -
    177B  LEU*     1.3    76.5    -      -       -      +
    179B  ILE*     1.3    58.1    +      -       +      +
    181B  PHE*     3.3     6.5    +      -       +      +
    182B  LYS*     2.8    59.4    +      -       +      +
   9004B  EDO      3.6    38.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 179 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    137B  PHE*     5.7     0.4    -      -       +      -
    139B  LEU*     4.1    16.8    -      -       +      -
    175B  GLU*     3.2    18.4    +      -       +      +
    176B  ALA*     3.7     7.2    -      -       -      +
    178B  LEU*     1.3    76.7    -      -       +      +
    180B  GLN*     1.3    63.0    +      -       -      +
    182B  LYS*     3.3    11.6    +      -       +      +
    183B  GLN*     3.1    25.0    +      -       +      +
    377B  ALA*     3.6    31.2    -      -       +      -
    378B  ILE*     4.3    15.9    -      -       +      -
    381B  LEU*     3.9    16.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 180 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    125B  LYS*     3.0    44.6    +      -       -      +
    126B  LEU*     3.4    18.0    -      -       -      +
    176B  ALA      3.0    12.7    +      -       -      +
    177B  LEU*     3.4    26.0    -      -       -      +
    179B  ILE*     1.3    76.7    -      -       -      +
    181B  PHE*     1.3    63.3    +      -       +      +
    183B  GLN*     3.0    12.5    +      -       -      +
    185B  LEU*     3.2    40.9    +      -       +      +
    190B  ALA*     5.4     0.8    -      -       -      +
    193B  ASP*     4.1     5.9    +      -       -      -
    381B  LEU*     3.7    32.1    -      -       +      +
    384B  LEU*     3.9     5.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 181 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8B  MET*     4.3    32.8    -      -       +      -
     32B  ILE*     5.3     2.5    -      -       +      -
     59B  TYR*     3.6    27.8    -      +       -      -
    125B  LYS*     4.5    12.3    -      -       +      -
    177B  LEU*     2.7    55.7    +      -       +      +
    178B  LEU*     3.9     9.4    -      -       +      +
    180B  GLN*     1.3    72.9    -      -       +      +
    182B  LYS*     1.3    58.0    +      -       +      +
    184B  GLY*     3.0    19.2    +      -       -      -
    185B  LEU      4.1     6.1    -      -       -      +
    186B  ASP*     3.4    45.2    -      -       +      +
    187B  ARG      5.2     0.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 182 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    178B  LEU*     2.8    47.7    +      -       +      +
    179B  ILE*     3.6    11.4    -      -       +      +
    181B  PHE*     1.3    76.0    -      -       +      +
    183B  GLN*     1.3    62.1    +      -       -      +
    184B  GLY      3.2     1.2    +      -       -      -
   9004B  EDO      3.2    25.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 183 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    179B  ILE*     3.1    15.7    +      -       +      +
    180B  GLN      3.0    10.1    +      -       -      +
    182B  LYS*     1.3    79.9    -      -       -      +
    184B  GLY*     1.3    59.5    +      -       -      +
    185B  LEU*     3.3    22.7    +      -       +      +
    367B  TRP*     4.7    20.6    -      -       +      -
    370B  ILE*     5.2     5.1    -      -       -      +
    378B  ILE*     3.7    40.3    -      -       +      +
    381B  LEU*     4.1    17.3    -      -       +      -
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


   I  Hydrophilic      - N and O that can donate and accept hydrogen bonds
                         (e.g., oxygen of hydroxyl group of Ser. or Thr)
  II  Acceptor         - N or O that can only accept a hydrogen bond
 III  Donor            - N that can only donate a hydrogen bond
  IV  Hydrophobic      - Cl, Br, I and all C atoms that are not in
                         aromatic rings and do not have a covalent bond to
                         a N or O atom
   V  Aromatic         - C in aromatic rings irrespective of any other 
                         bonds formed by the atom
  VI  Neutral          - C atoms that have a covalent bond to at least one
                         atom of class I or two or more atoms from class II
                         or III; atoms; S, F, P, and metal atoms in all cases
 VII  Neutral-donor    - C atoms that have a covalent bond with only one
                         atom of class III
VIII  Neutral-acceptor - C atoms that have a covalent bond with only 
                         one atom of class II
For each pair of contacts the state of legitimacy is shown below:

Legend:
+, legitimate
-, illegitimate
------------------------------------------------------------
  Atomic class           I  II  III   IV   V   VI  VII  VIII
------------------------------------------------------------
   I  (Hydrophilic)      +   +    +    -   +   +    +    +
  II  (Acceptor)         +   -    +    -   +   +    +    -
 III  (Donor)            +   +    -    -   +   +    -    +
  IV  (Hydrophobic)      -   -    -    +   +   +    +    +
   V  (Aromatic)         +   +    +    +   +   +    +    +
  VI  (Neutral)          +   +    +    +   +   +    +    +
 VII  (Neutral-donor)    +   +    -    +   +   +    -    +
VIII  (Neutral-acceptor) +   -    +    +   +   +    +    -
------------------------------------------------------------
Warning!
Atom classes for heterogroups are automatically assigned based on the atomic coordinates. However, in three cases (see below) the automatic assignment is currently ambiguous. In these cases, the user is advised to manually analyse the full list of contacts using LPC software.
1. Carbon atoms belonging to a 4-, 5- or 6-member ring are 
   considered "aromatic" (Class V) if the ring is approximately
   planar, and "hydrophobic" (Class IV) or "neutral" (Classes
   VI, VII, VIII) if the ring is non-planar.
2. The oxygen atom of a carbonyl or hydroxy group is considered
   "hydroxy" (Class I) if the CO bond is longer than 1.29 Å, and
   "carbonyl" (Class II) if shorter.
3. All nitrogen atoms are considered "hydrophilic" (Class I).

Please E-mail any questions and/or suggestions concerning this page to Vladimir.Sobolev@weizmann.ac.il