Contacts of the helix formed by residues 228 - 252 (chain E) in PDB entry 5ZR1


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 228 (chain E).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    227E  CYS*     1.3    79.2    -      -       -      +
    229E  ASP*     1.3    60.8    +      -       -      +
    230E  ASP*     3.6     9.9    +      -       -      +
    231E  GLN*     3.4    22.6    +      -       -      +
    232E  PHE*     2.9    37.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 229 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    210E  MET*     4.9    11.7    -      -       +      +
    228E  THR*     1.3    74.7    -      -       -      +
    230E  ASP*     1.3    60.5    +      -       -      +
    232E  PHE*     3.4    21.4    -      -       +      +
    233E  GLN*     2.7    37.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 230 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    228E  THR*     3.2     8.9    +      -       -      +
    229E  ASP*     1.3    82.7    -      -       -      +
    231E  GLN*     1.3    59.6    +      -       -      +
    233E  GLN*     4.1    10.4    -      -       -      +
    234E  ASN*     3.3    24.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 231 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    227E  CYS*     4.9     6.5    -      -       +      -
    228E  THR*     3.4    23.5    +      -       -      +
    230E  ASP*     1.3    77.8    -      -       -      +
    232E  PHE*     1.3    60.1    +      -       -      +
    233E  GLN      3.3     0.2    -      -       -      -
    234E  ASN*     3.7    16.8    +      -       -      +
    235E  VAL*     2.9    34.2    +      -       -      +
    278E  ILE*     3.4    44.0    +      -       +      +
    279E  PHE*     4.3    23.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 232 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    210E  MET*     4.7    19.4    -      -       +      +
    215E  LEU*     4.8    10.3    -      -       +      +
    219E  ILE*     3.5    36.8    -      -       +      -
    227E  CYS*     3.5    34.1    -      -       +      -
    228E  THR*     2.9    25.2    +      -       -      +
    229E  ASP*     3.1    25.1    +      -       -      +
    231E  GLN*     1.3    77.2    -      -       -      +
    233E  GLN*     1.3    62.6    +      -       -      +
    235E  VAL*     3.3    22.5    -      -       +      +
    236E  ALA*     3.5    11.3    +      -       -      +
    278E  ILE*     6.3     0.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 233 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    206E  CYS*     4.2    15.4    -      -       +      +
    210E  MET*     3.6    27.8    -      -       +      +
    229E  ASP*     2.7    20.7    +      -       -      +
    230E  ASP*     4.4    10.4    -      -       -      +
    232E  PHE*     1.3    73.4    -      -       -      +
    234E  ASN*     1.3    58.0    +      -       -      +
    236E  ALA*     3.5     3.0    +      -       -      +
    237E  ALA*     3.0    31.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 234 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    230E  ASP      3.3    18.1    +      -       -      +
    231E  GLN*     3.3    20.0    +      -       -      +
    232E  PHE      3.3     0.4    -      -       -      -
    233E  GLN*     1.3    77.0    -      -       -      +
    235E  VAL*     1.3    59.9    +      -       -      +
    237E  ALA*     4.3     8.9    -      -       -      +
    238E  ASN*     3.1    32.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 235 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    215E  LEU*     4.5    22.2    -      -       +      -
    231E  GLN*     2.9    19.8    +      -       -      +
    232E  PHE*     3.3    24.9    -      -       +      +
    234E  ASN*     1.3    77.2    -      -       -      +
    236E  ALA*     1.3    60.2    +      -       -      +
    238E  ASN*     4.2     3.4    -      -       -      +
    239E  PHE*     3.4    20.1    +      -       -      +
    266E  TRP*     4.5     5.3    -      -       +      -
    269E  TYR*     4.6     9.6    +      -       +      +
    273E  ILE*     5.8     4.0    -      -       +      -
    277E  ASN      5.4     0.2    -      -       -      +
    278E  ILE*     4.9    29.2    -      -       +      +
    284E  LEU*     4.7    18.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 236 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    206E  CYS*     4.1    14.6    -      -       +      +
    209E  LEU*     4.0    32.7    -      -       +      +
    210E  MET*     5.6     1.1    -      -       +      -
    215E  LEU*     5.4     0.7    -      -       +      -
    232E  PHE      3.5    13.1    +      -       -      +
    233E  GLN*     4.1     3.1    -      -       -      +
    234E  ASN      3.3     0.2    -      -       -      -
    235E  VAL*     1.3    81.4    -      -       -      +
    237E  ALA*     1.3    63.6    +      -       -      +
    239E  PHE*     3.4     3.1    +      -       -      +
    240E  ILE*     3.2    27.4    +      -       -      +
    266E  TRP*     4.2    15.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 237 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    202E  VAL*     3.7    20.9    -      -       +      -
    206E  CYS*     3.8    11.1    -      -       -      -
    233E  GLN*     3.0    22.0    +      -       +      +
    234E  ASN*     4.1    10.3    -      -       -      +
    236E  ALA*     1.3    77.9    -      -       -      +
    238E  ASN*     1.3    56.9    +      -       -      +
    240E  ILE*     3.3     2.8    +      -       -      +
    241E  HIS*     3.1    37.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 238 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    234E  ASN*     3.1    27.3    +      -       -      +
    235E  VAL*     4.3     3.8    -      -       -      +
    236E  ALA      3.3     0.2    -      -       -      -
    237E  ALA*     1.3    73.8    -      -       -      +
    239E  PHE*     1.3    62.3    +      -       -      +
    241E  HIS*     4.0    11.6    -      -       -      +
    242E  LEU*     3.2    27.3    +      -       -      +
    269E  TYR*     5.3     2.5    -      -       -      +
    281E  PRO*     3.3    34.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 239 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    209E  LEU*     4.2     8.7    -      -       +      -
    235E  VAL      3.4    14.4    +      -       -      +
    236E  ALA      3.4     7.1    +      -       -      +
    237E  ALA      3.2     0.6    -      -       -      -
    238E  ASN*     1.3    76.5    -      -       -      +
    240E  ILE*     1.3    59.1    +      -       +      +
    242E  LEU*     3.1     3.9    +      -       -      -
    243E  ILE*     2.7    55.4    +      -       +      +
    262E  ILE*     3.9    28.7    -      -       +      -
    265E  LYS      3.6    24.0    -      -       -      -
    266E  TRP*     3.4    29.2    -      +       +      -
    269E  TYR*     3.5    43.9    +      +       +      -
    291E  LEU*     4.7     0.9    -      -       +      -
    292E  PHE*     3.7    20.2    -      +       -      -
----------------------------------------------------------
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Residues in contact with ILE 240 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    198E  SER*     4.7     4.3    -      -       -      +
    201E  LEU*     3.7    54.1    -      -       +      +
    202E  VAL*     4.0    11.0    -      -       +      +
    205E  ARG*     4.1    14.4    -      -       +      -
    206E  CYS*     3.9    22.7    -      -       -      +
    209E  LEU*     4.4     8.1    -      -       +      -
    236E  ALA      3.2    15.8    +      -       -      +
    237E  ALA      3.3     6.5    +      -       -      +
    239E  PHE*     1.3    84.2    -      -       +      +
    241E  HIS*     1.3    57.1    +      -       +      +
    243E  ILE*     3.3     5.9    -      -       -      +
    244E  VAL*     3.0    33.4    +      -       +      +
    262E  ILE*     4.2    11.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with HIS 241 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    198E  SER*     4.2    29.9    -      -       -      -
    199E  THR*     5.6     1.6    -      -       -      -
    202E  VAL*     4.5    20.2    -      -       +      +
    237E  ALA*     3.1    33.3    +      -       +      +
    238E  ASN*     4.1    13.5    -      -       -      +
    239E  PHE      3.4     0.2    -      -       -      -
    240E  ILE*     1.3    76.5    -      -       +      +
    242E  LEU*     1.3    56.8    +      -       -      +
    244E  VAL*     4.1     5.3    -      -       -      +
    245E  GLN*     3.3    26.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 242 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    238E  ASN*     3.2    21.8    +      -       -      +
    239E  PHE      3.1     5.4    +      -       -      +
    241E  HIS*     1.3    77.2    -      -       -      +
    243E  ILE*     1.3    61.8    +      -       -      +
    244E  VAL      3.3     0.7    -      -       -      -
    245E  GLN*     4.0    12.7    -      -       +      +
    246E  ALA*     3.4    24.0    +      -       +      +
    269E  TYR*     4.3    15.7    -      -       +      +
    281E  PRO      5.7     1.6    -      -       -      +
    285E  TYR*     3.6    47.8    -      -       +      -
    292E  PHE*     3.6    26.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 243 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    239E  PHE*     2.7    36.3    +      -       +      +
    240E  ILE*     3.3    15.0    -      -       -      +
    242E  LEU*     1.3    72.6    -      -       -      +
    244E  VAL*     1.3    69.4    +      -       +      +
    246E  ALA      4.2     0.7    -      -       -      -
    247E  PHE*     3.4    47.0    +      -       +      +
    258E  LEU*     4.2     7.5    -      -       +      +
    261E  LEU*     3.9    19.3    -      -       +      +
    262E  ILE*     3.7    26.0    -      -       +      -
    265E  LYS*     3.7    18.6    -      -       +      -
    292E  PHE*     3.6    20.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 244 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    194E  VAL*     4.3    18.4    -      -       +      +
    197E  VAL*     5.1     5.6    -      -       +      -
    198E  SER*     4.7    20.4    -      -       -      -
    201E  LEU*     3.7    27.1    -      -       +      -
    240E  ILE*     3.0    22.7    +      -       +      +
    241E  HIS*     4.3     5.4    -      -       -      +
    243E  ILE*     1.3    75.9    -      -       +      +
    245E  GLN*     1.3    61.5    +      -       +      +
    246E  ALA      3.1     1.8    -      -       -      -
    247E  PHE      3.1     0.3    +      -       -      -
    248E  HIS*     2.7    51.0    +      -       +      +
    258E  LEU*     3.8    17.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 245 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    241E  HIS      3.3    18.8    +      -       -      +
    242E  LEU*     4.4    14.6    -      -       +      +
    243E  ILE      3.6     0.2    -      -       -      -
    244E  VAL*     1.3    79.9    -      -       -      +
    246E  ALA*     1.3    61.3    +      -       -      +
    248E  HIS*     4.9     3.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 246 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    449D  LYS*     5.7     0.9    +      -       -      -
    451D  TRP*     4.2    15.6    -      -       -      -
    242E  LEU*     3.4    17.9    +      -       +      +
    244E  VAL      3.1     0.4    -      -       -      -
    245E  GLN*     1.3    81.6    +      -       -      +
    247E  PHE*     1.3    77.8    +      -       +      +
    248E  HIS      3.6     1.2    +      -       -      -
    249E  SER*     4.8     2.3    +      -       -      -
    285E  TYR*     6.3     0.2    -      -       +      -
    292E  PHE*     3.6    30.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 247 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    449D  LYS*     6.1     0.2    -      -       -      -
    451D  TRP*     4.6     8.5    -      +       -      -
    243E  ILE*     3.4    49.8    +      -       +      +
    244E  VAL*     3.1     3.6    +      -       -      -
    246E  ALA*     1.3    89.0    -      -       +      +
    248E  HIS*     1.3    61.8    +      -       -      +
    249E  SER      3.3     2.2    -      -       -      +
    250E  TYR*     3.8     6.5    -      -       +      +
    251E  THR*     2.9    27.8    +      -       +      +
    258E  LEU*     5.1     2.7    -      -       +      -
    261E  LEU*     3.8    23.3    -      -       +      -
    265E  LYS*     3.7    22.9    -      -       +      -
    291E  LEU      3.8    11.0    -      -       -      -
    292E  PHE*     3.9    17.5    -      -       -      -
    293E  LEU      4.7     2.5    -      -       -      -
    294E  SER      3.9     7.9    -      -       -      -
    295E  THR*     3.6    39.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with HIS 248 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    383D  LEU      5.8     0.2    -      -       -      -
    384D  SER*     3.9    21.8    +      -       -      -
    194E  VAL*     3.6    34.5    -      -       +      +
    197E  VAL*     5.6     4.4    -      -       +      +
    244E  VAL*     2.7    30.9    +      -       +      +
    245E  GLN*     4.7     3.8    -      -       -      -
    246E  ALA      3.6     1.6    -      -       -      -
    247E  PHE*     1.3    73.4    -      -       -      +
    249E  SER*     1.3    57.9    +      -       -      +
    251E  THR*     3.8     4.0    +      -       -      -
    252E  GLY*     2.7    57.1    +      -       -      -
    253E  ASN*     3.2    28.1    +      -       -      -
    258E  LEU*     5.5     3.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 249 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    384D  SER*     3.7    17.2    +      -       -      -
    385D  ASP*     4.6     5.9    +      -       -      +
    386D  LEU*     3.2    46.0    +      -       -      +
    387D  GLU*     4.8     0.3    -      -       -      +
    451D  TRP*     3.8    22.1    +      -       -      -
    459D  VAL*     4.0     3.3    -      -       -      +
    246E  ALA      4.8     2.4    +      -       -      -
    247E  PHE*     3.3     1.2    -      -       -      +
    248E  HIS*     1.3    79.9    -      -       -      +
    250E  TYR*     1.3    58.4    +      -       -      +
    252E  GLY      4.8     0.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 250 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    253C  GLN*     3.8    13.3    +      -       -      +
    257C  ARG*     3.7     6.8    +      -       -      -
    386D  LEU*     4.6     2.7    -      -       -      -
    451D  TRP*     3.7    23.1    -      +       +      -
    454D  LYS      5.1     1.4    +      -       -      -
    455D  ASP*     3.2    44.9    -      -       +      -
    458D  ASN*     3.5    35.4    +      -       +      -
    459D  VAL*     3.4    21.6    -      -       -      +
    462D  ASN*     4.7     0.9    +      -       -      -
    247E  PHE*     3.5     8.4    +      -       +      +
    248E  HIS      3.2     0.6    -      -       -      -
    249E  SER*     1.3    77.8    -      -       -      +
    251E  THR*     1.3    76.0    +      -       +      +
    261E  LEU*     4.1    11.0    -      -       +      -
    295E  THR*     3.9    26.0    +      -       +      -
    297E  ASP*     3.0    32.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 251 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    387D  GLU*     3.3     9.5    -      -       -      +
    458D  ASN*     4.5     4.5    -      -       -      +
    462D  ASN*     3.6     6.9    +      -       -      -
    191E  ARG*     5.5     0.3    +      -       -      -
    247E  PHE*     2.9    18.9    +      -       +      +
    248E  HIS*     3.6     2.3    +      -       -      -
    250E  TYR*     1.3    94.6    -      -       +      +
    252E  GLY*     1.3    64.2    +      -       -      +
    254E  ASP*     3.0    23.2    -      -       -      +
    257E  ALA*     3.8    24.9    -      -       +      -
    258E  LEU*     3.2    30.7    -      -       +      +
    261E  LEU*     3.8    16.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 252 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    384D  SER*     4.1     6.9    +      -       -      -
    387D  GLU*     3.4    22.8    +      -       -      -
    191E  ARG*     4.8     0.2    -      -       -      -
    197E  VAL*     5.5     0.2    -      -       -      +
    248E  HIS*     2.7    44.0    +      -       -      -
    250E  TYR      3.6     0.8    -      -       -      -
    251E  THR*     1.3    78.0    +      -       -      +
    253E  ASN*     1.3    59.7    +      -       -      -
    254E  ASP      3.2     7.4    +      -       -      -
    258E  LEU*     4.2     3.6    -      -       -      +
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


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

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

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