Contacts of the helix formed by residues 223 - 247 (chain P) in PDB entry 3H1I


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 PRO 223 (chain P).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    433N  ASP*     3.5    19.5    -      -       -      +
    435N  ASN*     4.0    23.8    -      -       +      -
    436N  ARG*     4.1     9.0    -      -       +      -
   3008N  PEE      6.0     0.2    -      -       -      +
    222P  HIS*     1.4    92.0    -      -       +      +
    224P  TYR*     1.3    78.3    +      -       +      +
    226P  SER*     2.9    21.2    +      -       -      +
    227P  PHE*     3.1    40.5    +      -       +      +
    226Q  LYS*     4.4    10.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 224 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    432N  LEU*     6.1     0.2    -      -       +      -
    433N  ASP*     3.2    35.8    +      -       +      +
    435N  ASN*     2.9    26.2    +      -       -      -
    219P  ILE*     3.2    48.2    -      -       +      -
    220P  PRO*     3.8    10.8    -      -       +      +
    222P  HIS      3.4     1.6    -      -       -      -
    223P  PRO*     1.3    86.7    -      -       +      +
    225P  TYR*     1.3    69.6    +      -       +      +
    227P  PHE*     3.8     0.7    -      -       -      +
    228P  LYS*     3.1    18.4    +      -       -      +
    226Q  LYS      4.0     9.0    -      -       -      -
    227Q  TRP*     3.3    45.1    +      +       +      +
    229Q  VAL*     3.6    15.6    -      -       +      +
    230Q  LEU*     3.4    17.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 225 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     24P  ALA*     3.4    26.0    -      -       +      -
     25P  PRO      2.4    23.9    +      -       -      -
     26P  SER      3.0    22.3    +      -       -      -
     28P  ILE*     3.1    29.9    +      -       +      +
    219P  ILE*     3.2    23.3    -      -       +      +
    221P  PHE*     2.9    34.7    +      +       +      +
    224P  TYR*     1.3    75.4    -      -       +      +
    226P  SER*     1.3    60.9    +      -       -      +
    228P  LYS*     3.7    13.4    -      -       +      +
    229P  ASP*     3.0    32.6    +      -       -      +
   3002P  ANY      3.5    23.3    -      -       -      +
    227Q  TRP*     3.1    19.1    -      +       -      -
----------------------------------------------------------
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Residues in contact with SER 226 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     19P  LEU      5.0     2.2    -      -       -      -
    221P  PHE*     3.1    21.4    +      -       -      -
    222P  HIS*     3.0    22.4    +      -       -      -
    223P  PRO*     2.9    31.4    +      -       -      +
    225P  TYR*     1.3    73.3    -      -       -      +
    227P  PHE*     1.3    65.6    +      -       -      +
    229P  ASP*     2.8    15.4    +      -       -      +
    230P  ILE*     3.2    16.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 227 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   3008N  PEE      5.6     2.5    -      -       -      -
    222P  HIS*     4.8     9.4    -      +       -      -
    223P  PRO*     3.1    43.6    +      -       +      +
    224P  TYR      3.8     1.3    -      -       -      +
    226P  SER*     1.3    81.0    +      -       -      +
    228P  LYS*     1.3    64.5    +      -       -      +
    230P  ILE*     3.0    25.4    +      -       +      +
    231P  LEU*     3.1    12.5    +      -       -      +
   3005P  PEE      3.0    43.5    -      -       +      -
    219Q  LEU*     6.0     3.1    -      -       +      -
    222Q  MET*     4.3    30.5    -      -       +      -
    223Q  LYS*     4.6    17.3    -      -       +      +
    226Q  LYS*     3.7    35.4    -      -       +      -
    227Q  TRP*     5.7     0.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 228 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     28P  ILE      2.8    29.5    +      -       -      -
     29P  SER*     4.1    11.2    -      -       -      +
     30P  ALA      4.3     2.0    -      -       -      +
     33P  ASN*     3.2    32.3    +      -       -      +
    224P  TYR      3.1    14.7    +      -       -      +
    225P  TYR*     3.8    29.0    -      -       +      +
    227P  PHE*     1.3    80.1    -      -       -      +
    229P  ASP*     1.3    58.9    +      -       -      +
    231P  LEU*     3.7     3.1    +      -       +      +
    232P  GLY      3.2    12.3    +      -       -      -
   3002P  ANY      4.9     2.2    -      -       -      -
   3004P  CDL      5.1     0.4    +      -       -      -
    223Q  LYS*     4.0    33.5    -      -       +      +
    227Q  TRP*     4.3    11.2    -      -       +      +
   3003Q  CDL      4.1    29.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 229 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     33P  ASN*     3.5     6.0    +      -       -      +
     36P  SER*     3.3    19.6    +      -       -      +
     37P  LEU*     5.0     2.3    -      -       -      +
    221P  PHE*     3.3    10.2    -      -       -      -
    225P  TYR      3.0    18.0    +      -       -      +
    226P  SER*     2.8    10.7    +      -       -      +
    228P  LYS*     1.3    76.5    -      -       -      +
    230P  ILE*     1.3    58.1    +      -       +      +
    232P  GLY*     3.1     2.6    +      -       -      -
    233P  LEU*     2.7    34.3    +      -       -      +
   3002P  ANY      2.7    56.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 230 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    226P  SER      3.2    13.1    +      -       -      +
    227P  PHE*     3.0    17.2    +      -       +      +
    229P  ASP*     1.3    79.9    -      -       +      +
    231P  LEU*     1.3    62.5    +      -       -      +
    233P  LEU*     2.9    28.7    -      -       +      +
    234P  THR*     3.0     8.5    +      -       -      +
   3005P  PEE      3.4    39.5    -      -       +      -
    219Q  LEU*     3.3    28.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 231 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    227P  PHE      3.1    11.6    +      -       -      +
    228P  LYS*     3.8     7.9    -      -       +      +
    230P  ILE*     1.3    75.4    -      -       -      +
    232P  GLY*     1.3    58.0    +      -       -      +
    233P  LEU      2.9     4.7    +      -       -      -
    234P  THR*     2.8    24.0    +      -       -      +
    235P  LEU*     2.9    39.0    +      -       +      +
    216Q  THR*     4.5     4.3    -      -       +      +
    219Q  LEU*     3.4    16.7    -      -       +      +
    220Q  TYR*     3.2    53.2    -      -       +      +
    223Q  LYS*     3.8    18.6    -      -       +      -
   3003Q  CDL      3.5    30.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 232 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     33P  ASN*     4.5     4.5    -      -       -      -
     37P  LEU*     2.9    24.9    -      -       -      +
    228P  LYS      3.2     7.9    +      -       -      -
    229P  ASP      3.1     7.4    +      -       -      -
    231P  LEU*     1.3    78.8    -      -       -      +
    233P  LEU*     1.3    63.4    +      -       -      +
    235P  LEU*     4.0     1.3    -      -       -      +
    236P  MET*     3.4    11.3    +      -       -      +
   3003Q  CDL      3.6    32.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 233 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     37P  LEU*     3.9     7.9    -      -       +      -
     40P  VAL*     3.5    44.6    -      -       +      -
    229P  ASP      2.7    12.8    +      -       -      +
    230P  ILE*     2.9    20.4    -      -       +      +
    231P  LEU      2.9     1.0    +      -       -      -
    232P  GLY*     1.3    80.4    -      -       -      +
    234P  THR*     1.3    55.9    +      -       -      +
    236P  MET*     3.6     2.7    -      -       -      +
    237P  LEU*     2.7    45.3    +      -       +      +
   3005P  PEE      3.8    40.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 234 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    230P  ILE      3.0     4.7    +      -       -      +
    231P  LEU*     2.8    19.4    +      -       -      +
    233P  LEU*     1.3    78.2    -      -       -      +
    235P  LEU*     1.3    64.2    +      -       -      +
    237P  LEU*     3.1    10.5    +      -       -      +
    238P  THR*     2.9    28.5    +      -       -      -
   3005P  PEE      4.0    25.4    -      -       +      -
    212Q  SER*     4.8     1.0    +      -       -      -
    215Q  LEU*     4.2    14.8    -      -       +      -
    216Q  THR*     4.1    20.5    +      -       -      +
    219Q  LEU*     3.9    24.5    -      -       +      +
   3009R  PLC      5.0     9.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 235 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    231P  LEU*     2.9    52.5    +      -       +      +
    232P  GLY      4.0     3.6    -      -       -      +
    234P  THR*     1.3    80.2    +      -       -      +
    236P  MET*     1.3    63.8    +      -       -      +
    238P  THR*     3.4     5.7    +      -       -      -
    239P  PRO*     3.0    17.8    -      -       -      +
    216Q  THR*     3.8    26.9    -      -       +      +
   3003Q  CDL      3.8    63.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with MET 236 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     37P  LEU*     4.1    18.2    -      -       +      +
     40P  VAL*     5.5     6.7    -      -       +      -
     41P  CYS*     3.8    19.7    -      -       -      -
     90P  PHE*     3.5    43.5    -      -       +      -
     94P  CYS*     4.2    19.1    -      -       -      -
    232P  GLY      3.4    13.8    +      -       -      +
    233P  LEU*     3.0     3.6    +      -       -      +
    235P  LEU*     1.3    74.2    -      -       -      +
    237P  LEU*     1.3    64.3    +      -       +      +
    238P  THR      2.7    16.6    +      -       -      -
    239P  PRO*     2.8    18.9    -      -       -      +
    240P  PHE*     3.4    23.6    +      -       +      +
   3003Q  CDL      3.6    30.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 237 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     40P  VAL*     5.0     8.7    -      -       +      -
     44P  THR*     5.7     2.2    -      -       +      +
    233P  LEU*     2.7    35.4    +      -       +      +
    234P  THR*     3.1     9.4    +      -       -      +
    236P  MET*     1.3    85.2    -      -       +      +
    238P  THR*     1.3    58.0    +      -       -      +
    240P  PHE*     3.8    21.0    -      -       +      +
    241P  LEU*     3.0    39.9    +      -       +      +
   3005P  PEE      4.0    35.7    -      -       +      -
   3009R  PLC      4.1    34.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 238 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    234P  THR      2.9    14.5    +      -       -      -
    235P  LEU*     3.6     5.9    +      -       -      -
    236P  MET      2.7     6.9    +      -       -      -
    237P  LEU*     1.3    70.2    -      -       -      +
    239P  PRO*     1.3    76.9    -      -       +      +
    240P  PHE      3.1     0.7    -      -       -      -
    241P  LEU*     3.0     5.3    +      -       -      +
    242P  THR*     2.7    36.1    +      -       -      +
    208Q  MET*     3.9     2.6    -      -       -      +
    209Q  LEU*     4.6    10.5    -      -       +      -
    212Q  SER*     2.5    30.7    +      -       -      +
    216Q  THR*     4.1     6.4    +      -       -      -
   3009R  PLC      5.1     0.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with PRO 239 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     90P  PHE*     3.5    22.2    -      -       +      -
    235P  LEU      3.0    15.3    -      -       -      +
    236P  MET*     2.8    25.6    -      -       -      +
    238P  THR*     1.3    83.0    -      -       +      +
    240P  PHE*     1.3    55.3    +      -       -      +
    242P  THR*     3.9     9.6    -      -       +      +
    243P  LEU*     2.5    37.8    +      -       +      +
   3003Q  CDL      4.3    19.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 240 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     44P  THR*     4.6    19.1    -      -       +      -
     83P  LEU*     3.1    45.1    -      -       +      -
     86P  ASN*     3.4    10.3    -      -       +      -
     87P  GLY*     3.1    33.4    -      -       -      -
     90P  PHE*     3.1    43.0    -      +       +      -
    236P  MET*     3.7    20.9    -      -       +      +
    237P  LEU*     3.8    19.3    -      -       +      +
    238P  THR      3.1     0.2    -      -       -      -
    239P  PRO*     1.3    77.6    -      -       -      +
    241P  LEU*     1.3    70.8    +      -       +      +
    243P  LEU*     3.2     3.3    -      -       -      +
    244P  ALA*     2.8    28.6    +      -       +      +
   3009R  PLC      5.1     1.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 241 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     83P  LEU*     3.6    29.2    -      -       +      -
    237P  LEU*     3.0    23.6    -      -       +      +
    238P  THR      3.0     1.2    +      -       -      -
    240P  PHE*     1.3    87.6    -      -       +      +
    242P  THR*     1.3    58.5    +      -       -      +
    244P  ALA*     2.7     6.4    +      -       -      +
    245P  LEU*     2.5    41.5    +      -       +      +
    208Q  MET*     3.2    33.2    -      -       +      -
   3009R  PLC      3.7    56.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 242 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    238P  THR*     2.7    35.4    +      -       -      +
    239P  PRO*     3.5     8.3    -      -       +      -
    241P  LEU*     1.3    69.1    -      -       -      +
    243P  LEU*     1.3    65.6    +      -       -      +
    246P  PHE*     2.9    47.4    +      -       +      +
    208Q  MET*     2.7    22.3    -      -       -      +
    209Q  LEU*     3.7    11.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 243 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     86P  ASN*     3.8    14.4    -      -       -      +
     90P  PHE*     3.7    18.4    -      -       +      -
    239P  PRO      2.5    22.2    +      -       -      +
    240P  PHE      3.2     4.5    -      -       -      +
    242P  THR*     1.3    76.7    -      -       -      +
    244P  ALA*     1.3    53.7    +      -       -      +
    247P  SER*     2.8    55.4    +      -       -      +
    250P  LEU*     3.9    26.2    -      -       +      -
    251P  LEU*     3.3    36.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 244 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     78P  TRP*     5.0     1.4    -      -       -      -
     79P  LEU*     5.5     1.9    -      -       +      +
     82P  ASN*     3.7    21.8    -      -       +      +
     83P  LEU*     4.5    16.8    -      -       +      -
     86P  ASN*     3.6    28.9    -      -       +      +
    240P  PHE*     2.8    15.8    +      -       +      +
    241P  LEU*     2.7    12.4    +      -       -      +
    243P  LEU*     1.3    71.3    -      -       -      +
    245P  LEU*     1.3    62.7    +      -       +      +
    248P  PRO*     3.6    18.2    -      -       -      +
    201Q  ARG*     4.7     0.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 245 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     78P  TRP*     4.4    18.6    -      -       +      -
     79P  LEU*     4.6    11.9    -      -       +      -
    241P  LEU*     2.5    22.6    +      -       +      +
    242P  THR      4.0     1.3    -      -       -      +
    244P  ALA*     1.3    81.0    -      -       +      +
    246P  PHE*     1.3    65.0    +      -       +      +
    247P  SER      3.8     0.2    -      -       -      -
    201Q  ARG*     2.6    50.9    +      -       -      +
    204Q  MET*     4.3    13.7    -      -       +      -
    205Q  GLY*     3.6    18.4    -      -       -      +
    208Q  MET*     3.4    45.1    -      -       +      -
   3009R  PLC      5.0    11.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 246 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    242P  THR*     2.9    41.7    +      -       +      +
    245P  LEU*     1.3    81.2    -      -       -      +
    247P  SER*     1.3    61.4    +      -       -      +
    248P  PRO*     3.7     0.3    -      -       -      +
     17Q  PRO*     3.5    41.9    -      -       +      +
     18Q  LEU*     4.4     6.5    -      -       +      -
    201Q  ARG*     3.0    20.3    +      -       -      +
    202Q  LYS*     3.9    19.7    -      -       +      -
    205Q  GLY*     2.8    47.6    -      -       -      -
    206Q  LEU*     3.6     2.7    -      -       -      -
    208Q  MET*     4.4     0.9    -      -       +      -
    209Q  LEU*     3.9    26.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 247 (chain P). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    243P  LEU*     2.8    23.0    +      -       -      +
    246P  PHE*     1.3    83.2    -      -       -      +
    248P  PRO*     1.3    68.0    -      -       -      +
    249P  ASN      3.3     1.7    -      -       -      -
    250P  LEU*     2.9    42.5    +      -       -      +
----------------------------------------------------------
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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