Contacts of the helix formed by residues 208 - 234 (chain B) in PDB entry 3AA6


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 208 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    272A  ASN*     4.2     4.5    -      -       -      +
    275A  LEU*     3.9    24.0    -      -       +      -
    203B  VAL*     4.8     2.7    -      -       +      -
    204B  SER      3.1    15.2    -      -       -      +
    205B  ASP*     3.9     9.0    -      -       -      +
    206B  SER      3.6     7.6    -      -       -      +
    207B  SER*     1.3    92.9    -      -       -      +
    209B  HIS*     1.3    68.9    +      -       -      +
    210B  ILE*     3.3     2.5    -      -       +      +
    211B  ALA*     3.0    14.1    +      -       +      +
    212B  ASN*     3.0    19.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with HIS 209 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     92B  ARG*     4.2     6.5    -      -       -      -
     96B  LEU*     4.7    15.5    -      -       +      -
    128B  PHE*     3.6    28.2    -      +       +      -
    156B  VAL*     3.7    19.2    -      -       +      +
    158B  GLU*     3.0    26.8    +      -       +      -
    165B  ALA*     3.8     4.7    -      -       +      -
    167B  TYR*     2.6    34.3    +      -       -      -
    203B  VAL*     3.7    31.4    -      -       +      +
    208B  PRO*     1.3    71.2    -      -       -      +
    210B  ILE*     1.3    57.7    +      -       -      +
    212B  ASN*     3.1     1.9    +      -       -      +
    213B  ILE*     2.9    37.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 210 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    271A  TRP*     4.3     4.2    -      -       +      -
    275A  LEU*     3.6    28.9    -      -       +      -
     96B  LEU*     3.5    34.3    -      -       +      +
     99B  GLU*     3.6    15.7    -      -       +      +
    100B  ALA*     3.3    37.7    -      -       +      +
    103B  ALA*     3.9    16.4    -      -       +      -
    104B  PHE*     4.8     9.3    -      -       +      -
    208B  PRO*     3.2     3.2    +      -       +      +
    209B  HIS*     1.3    75.9    -      -       +      +
    211B  ALA*     1.3    51.9    +      -       -      +
    213B  ILE*     3.8     8.5    -      -       +      +
    214B  GLY*     2.7    31.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 211 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    271A  TRP*     4.0    19.0    -      -       +      -
    272A  ASN*     4.4     4.5    -      -       -      +
    275A  LEU*     4.1    12.2    -      -       +      +
    207B  SER*     4.8     0.2    -      -       -      -
    208B  PRO*     3.0    28.0    +      -       +      +
    210B  ILE*     1.3    74.4    -      -       -      +
    212B  ASN*     1.3    67.6    +      -       -      +
    215B  ARG*     3.0    52.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 212 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    167B  TYR*     2.8    42.7    +      -       +      +
    201B  GLU*     4.0    19.9    -      -       +      +
    202B  THR      3.0    25.3    +      -       -      +
    203B  VAL*     4.1     1.6    -      -       -      +
    207B  SER*     2.6    34.2    +      -       -      -
    208B  PRO      3.0    12.0    +      -       -      -
    209B  HIS      3.5     3.6    -      -       -      +
    211B  ALA*     1.3    78.3    -      -       -      +
    213B  ILE*     1.3    62.4    +      -       -      +
    215B  ARG*     3.6     9.4    +      -       -      +
    216B  LEU*     3.3    30.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 213 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     96B  LEU*     6.0     0.4    -      -       +      -
    104B  PHE*     4.4     7.6    -      -       +      -
    121B  LEU*     6.1     2.5    -      -       +      -
    128B  PHE*     4.2    28.5    -      -       +      -
    132B  ILE*     3.8    28.7    -      -       +      -
    154B  VAL*     4.3    20.2    -      -       +      -
    156B  VAL*     4.3     6.1    -      -       +      -
    167B  TYR*     3.8    20.6    -      -       +      -
    209B  HIS*     2.9    26.5    +      -       +      +
    210B  ILE*     3.9     8.3    -      -       +      +
    212B  ASN*     1.3    74.5    -      -       -      +
    214B  GLY*     1.3    60.6    +      -       -      +
    216B  LEU*     3.3     9.5    +      -       -      +
    217B  VAL*     2.8    33.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 214 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    271A  TRP*     3.3    40.2    -      -       -      -
    104B  PHE*     3.7     9.6    -      -       -      -
    210B  ILE      2.7    23.0    +      -       -      -
    211B  ALA      3.9     0.2    -      -       -      -
    212B  ASN      3.4     0.2    -      -       -      -
    213B  ILE*     1.3    74.8    -      -       -      +
    215B  ARG*     1.3    56.6    +      -       -      +
    217B  VAL*     3.3     1.0    +      -       -      +
    218B  GLU*     2.8    26.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 215 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    269A  ILE      5.9     0.2    -      -       -      -
    271A  TRP*     3.5    34.9    -      -       +      +
    272A  ASN*     4.8    11.9    -      -       -      +
    201B  GLU*     5.4     6.8    +      -       -      +
    206B  SER      4.9     1.8    +      -       -      -
    207B  SER*     2.8    31.7    +      -       -      +
    211B  ALA*     3.0    37.1    +      -       -      +
    212B  ASN*     3.6    13.3    +      -       -      +
    214B  GLY*     1.3    75.5    -      -       -      +
    216B  LEU*     1.3    60.4    -      -       +      +
    218B  GLU*     3.4     4.0    +      -       -      +
    219B  ASP*     2.9    40.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 216 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    154B  VAL*     5.2     3.6    -      -       +      -
    167B  TYR*     3.6    38.8    -      -       +      -
    169B  LEU*     3.5    19.6    -      -       +      +
    197B  MET*     3.9    30.9    -      -       +      +
    199B  LYS*     3.7    34.3    -      -       +      +
    201B  GLU*     4.3     5.8    -      -       +      +
    212B  ASN      3.3    17.2    +      -       -      +
    213B  ILE*     3.3     8.4    +      -       +      +
    215B  ARG*     1.3    77.9    -      -       +      +
    217B  VAL*     1.3    67.0    +      -       -      +
    219B  ASP*     3.9     6.0    -      -       -      +
    220B  MET*     3.0    25.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 217 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    104B  PHE*     4.0    21.8    -      -       +      -
    107B  TYR*     4.1    12.3    -      -       +      +
    132B  ILE*     4.0    28.5    -      -       +      -
    152B  HIS*     3.7    37.8    -      -       +      +
    169B  LEU*     3.9    16.2    -      -       +      -
    213B  ILE*     2.8    26.0    +      -       +      +
    214B  GLY      3.8     3.4    -      -       -      +
    216B  LEU*     1.3    77.8    -      -       -      +
    218B  GLU*     1.3    56.5    +      -       -      +
    220B  MET*     3.2     1.6    +      -       -      +
    221B  GLU*     2.8    29.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 218 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    268A  LYS*     3.2    17.9    -      -       -      +
    269A  ILE*     2.7    34.6    +      -       -      +
    271A  TRP*     3.1    20.9    +      -       -      +
    107B  TYR*     3.7    16.6    -      -       +      -
    111B  TYR*     2.6    43.3    +      -       +      +
    214B  GLY      2.8    17.4    +      -       -      +
    215B  ARG*     3.8     5.5    -      -       -      +
    217B  VAL*     1.3    78.1    -      -       -      +
    219B  ASP*     1.3    57.7    +      -       -      +
    221B  GLU      3.9     0.2    -      -       -      -
    222B  ASN*     2.9    41.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 219 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    268A  LYS*     2.5    40.1    +      -       -      +
    197B  MET*     6.1     4.7    -      -       +      -
    215B  ARG*     2.9    26.0    +      -       -      +
    216B  LEU*     3.9     6.9    -      -       -      +
    218B  GLU*     1.3    76.0    -      -       -      +
    220B  MET*     1.3    61.7    +      -       -      +
    222B  ASN*     3.9     4.0    -      -       -      +
    223B  LYS*     3.1    24.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 220 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    152B  HIS*     4.6     0.7    -      -       +      -
    169B  LEU*     3.8    14.1    -      -       +      +
    171B  SER*     3.3    28.9    -      -       -      +
    195B  ARG*     3.6    52.5    -      -       -      +
    196B  GLN*     3.9     5.4    -      -       -      +
    197B  MET*     3.8    30.7    -      -       +      +
    216B  LEU      3.0    18.8    +      -       -      +
    217B  VAL      3.7     2.9    -      -       -      +
    218B  GLU      3.2     0.2    -      -       -      -
    219B  ASP*     1.3    78.5    -      -       -      +
    221B  GLU*     1.3    58.4    +      -       -      +
    223B  LYS*     3.2     7.2    +      -       -      +
    224B  ILE*     2.8    38.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 221 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    259A  ARG*     2.9    27.4    +      -       -      +
    107B  TYR*     2.6    35.1    +      -       -      +
    112B  PHE*     3.4     7.9    -      -       -      -
    134B  ILE*     3.6     7.1    -      -       -      +
    148B  TRP*     4.1    12.3    -      -       +      -
    150B  SER*     2.6    27.8    +      -       -      +
    152B  HIS*     2.8    26.3    +      -       +      +
    173B  VAL*     4.7     3.4    -      -       +      -
    217B  VAL      2.8    17.8    +      -       -      +
    220B  MET*     1.3    74.3    -      -       -      +
    222B  ASN*     1.3    60.0    +      -       -      +
    224B  ILE*     3.8     5.9    -      -       -      +
    225B  ARG*     2.9    30.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 222 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    259A  ARG*     2.9    34.4    +      -       -      +
    261A  GLN      4.1     7.4    -      -       -      -
    262A  LEU*     4.0     8.7    -      -       -      +
    268A  LYS*     3.9    22.4    -      -       -      +
    111B  TYR*     3.2    24.3    +      -       -      -
    218B  GLU*     2.9    20.9    +      -       -      +
    219B  ASP*     3.9     4.7    -      -       -      +
    221B  GLU*     1.3    76.8    -      -       -      +
    223B  LYS*     1.3    60.7    +      -       -      +
    225B  ARG*     3.5     9.5    +      -       -      +
    226B  SER*     3.3    20.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 223 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    195B  ARG*     3.7    43.1    -      -       -      +
    219B  ASP      3.1    15.4    +      -       -      +
    220B  MET*     3.4    11.0    -      -       -      +
    222B  ASN*     1.3    75.2    -      -       -      +
    224B  ILE*     1.3    58.6    +      -       -      +
    226B  SER*     2.9    28.0    +      -       -      +
    227B  THR*     3.0    28.2    +      -       -      +
    230B  GLU*     5.7     2.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 224 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    152B  HIS*     5.4     0.2    -      -       +      -
    171B  SER*     3.9    23.8    -      -       -      +
    173B  VAL*     3.6    37.7    -      -       +      +
    193B  LEU*     4.7    16.2    -      -       +      +
    195B  ARG*     3.8    26.5    -      -       +      +
    220B  MET*     2.8    46.3    +      -       +      +
    221B  GLU*     4.0     3.8    -      -       -      +
    223B  LYS*     1.3    70.9    -      -       -      +
    225B  ARG*     1.3    58.1    +      -       -      +
    227B  THR*     4.3     4.7    -      -       -      -
    228B  LEU*     2.7    45.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 225 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    255A  PHE*     3.5    40.0    -      -       +      -
    256A  LYS*     5.8     2.8    -      -       -      +
    259A  ARG*     3.8    16.3    -      -       -      +
    260A  ARG      3.7    24.7    -      -       -      -
    261A  GLN*     3.5    46.0    +      -       -      +
    148B  TRP*     4.0    24.8    -      -       +      -
    221B  GLU      2.9    17.7    +      -       -      +
    222B  ASN*     3.6     8.5    +      -       -      +
    223B  LYS      3.3     0.2    -      -       -      -
    224B  ILE*     1.3    77.4    -      -       -      +
    226B  SER*     1.3    79.8    +      -       -      +
    228B  LEU*     3.5     2.5    +      -       -      -
    229B  ASN*     3.0    31.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 226 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    222B  ASN      3.3     7.2    +      -       -      -
    223B  LYS*     2.9    28.5    +      -       -      +
    224B  ILE      3.2     0.4    -      -       -      -
    225B  ARG*     1.3    95.2    -      -       -      +
    227B  THR*     1.3    64.0    +      -       -      +
    229B  ASN*     3.3     8.4    -      -       -      +
    230B  GLU*     3.1    36.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 227 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    193B  LEU*     3.8    19.3    -      -       +      -
    195B  ARG*     4.8    12.4    -      -       -      +
    223B  LYS*     3.0    32.8    +      -       -      +
    224B  ILE*     3.7     9.3    -      -       -      -
    226B  SER*     1.3    75.0    +      -       -      +
    228B  LEU*     1.3    61.1    +      -       -      +
    230B  GLU*     3.2    16.5    +      -       -      +
    231B  ILE*     2.8    46.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 228 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    255A  PHE*     4.2     6.7    -      -       +      -
    148B  TRP*     3.8    24.0    -      -       +      -
    173B  VAL*     3.4    37.5    -      -       +      +
    175B  LEU*     4.2    20.2    -      -       +      -
    193B  LEU*     3.7    25.1    -      -       +      +
    224B  ILE*     2.7    31.4    +      -       +      +
    225B  ARG*     3.5     4.5    -      -       -      +
    227B  THR*     1.3    72.0    -      -       -      +
    229B  ASN*     1.3    59.1    +      -       -      +
    231B  ILE*     4.7     0.2    -      -       -      -
    232B  TYR*     2.8    64.1    +      -       +      +
    233B  PHE*     5.2     0.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 229 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    251A  SER*     4.8     4.9    -      -       -      -
    255A  PHE*     3.8    19.5    -      -       +      -
    256A  LYS*     6.1     1.0    -      -       -      +
    225B  ARG*     3.0    21.4    +      -       -      +
    226B  SER*     3.3    14.0    -      -       -      +
    227B  THR      3.2     0.2    -      -       -      -
    228B  LEU*     1.3    75.5    -      -       -      +
    230B  GLU*     1.3    59.9    +      -       -      +
    233B  PHE*     3.1    51.6    +      -       -      +
    234B  GLY      3.6     1.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 230 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    223B  LYS*     5.7     2.9    +      -       -      -
    226B  SER*     3.1    29.9    +      -       -      +
    227B  THR*     3.5    19.6    +      -       -      +
    229B  ASN*     1.3    79.5    -      -       +      +
    231B  ILE*     1.3    63.7    +      -       +      +
    234B  GLY*     2.9    11.6    +      -       -      +
    235B  LYS*     2.8    27.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 231 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    198A  TYR*     3.4    55.0    -      -       +      +
    204A  VAL*     4.3    21.8    -      -       +      -
    193B  LEU*     4.3     8.3    -      -       +      -
    227B  THR*     2.8    40.0    +      -       +      +
    228B  LEU      4.2     1.6    -      -       -      +
    230B  GLU*     1.3    72.3    -      -       +      +
    232B  TYR*     1.3    66.2    +      -       +      +
    235B  LYS*     3.3    36.8    +      -       +      +
    236B  THR*     2.9    31.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 232 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    204A  VAL*     3.5    30.4    -      -       +      +
    247A  TYR*     3.1    10.9    -      -       -      -
    175B  LEU*     2.8    52.9    +      -       +      +
    177B  LEU*     4.0     4.5    -      -       +      -
    189B  LEU*     3.5    39.2    -      -       +      +
    190B  GLY      3.5     0.3    -      -       -      -
    191B  GLY*     3.2    26.3    +      -       -      -
    192B  SER*     4.6     0.5    -      -       -      -
    228B  LEU*     2.8    45.9    +      -       +      +
    231B  ILE*     1.3    78.3    -      -       +      +
    233B  PHE*     1.3    76.7    +      -       +      +
    234B  GLY      3.7     0.2    +      -       -      -
    236B  THR*     2.7    27.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 233 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    247A  TYR*     3.8    21.8    -      +       +      +
    250A  MET*     3.7    24.9    -      -       +      -
    251A  SER*     3.6    23.1    -      -       -      -
    255A  PHE*     3.6    43.7    -      +       +      -
    175B  LEU*     4.8     0.7    -      -       +      -
    177B  LEU*     3.6    26.7    -      -       +      -
    189B  LEU*     4.1     8.7    -      -       +      -
    228B  LEU      4.7     0.4    -      -       -      -
    229B  ASN*     3.1    34.7    +      -       -      +
    232B  TYR*     1.3    91.1    -      +       +      +
    234B  GLY*     1.3    57.7    +      -       -      +
    237B  LYS*     3.0    29.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 234 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    229B  ASN      3.6     2.0    +      -       -      -
    230B  GLU*     2.9    14.2    +      -       -      -
    233B  PHE*     1.3    79.0    -      -       -      +
    235B  LYS*     1.3    59.9    +      -       -      +
    236B  THR      3.5     0.2    -      -       -      -
    237B  LYS*     3.4     7.8    +      -       -      +
    238B  ASP*     2.9    38.9    +      -       -      +
----------------------------------------------------------
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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