Contacts of the helix formed by residues 198 - 227 (chain B) in PDB entry 4DTZ


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 TYR 198 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    190B  ARG*     3.5    59.7    +      -       +      +
    191B  ALA*     3.2    27.8    +      -       +      +
    192B  ASN      3.8    15.7    -      -       -      -
    193B  PRO      3.3    22.4    -      -       -      +
    195B  ASP*     2.8    21.8    +      -       +      +
    197B  ALA*     1.3    81.8    -      -       +      +
    199B  ASP*     1.3    56.6    +      -       -      -
    201B  ASN*     3.3    16.2    -      -       -      +
    202B  LYS*     3.2    27.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 199 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    196B  PRO*     3.2    30.7    -      -       +      +
    197B  ALA      3.1     3.4    -      -       -      -
    198B  TYR*     1.3    75.8    -      -       -      +
    200B  GLU*     1.3    65.1    +      -       -      +
    201B  ASN      3.3     1.1    -      -       -      -
    202B  LYS*     3.6    18.6    -      -       +      +
    203B  ARG*     3.3    19.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 200 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    196B  PRO      4.9     0.2    +      -       -      -
    197B  ALA      4.3     4.3    +      -       -      +
    199B  ASP*     1.3    75.7    -      -       -      +
    201B  ASN*     1.3    70.9    +      -       -      +
    203B  ARG*     2.8    44.8    +      -       -      +
    204B  GLN*     2.9    27.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 201 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    183B  GLU*     3.4    25.2    +      -       -      +
    186B  ASN*     5.7     2.6    -      -       -      +
    190B  ARG*     3.2    23.5    -      -       -      +
    197B  ALA      3.6     6.4    -      -       -      +
    198B  TYR*     3.3    31.0    -      -       -      +
    200B  GLU*     1.3    79.2    +      -       -      +
    202B  LYS*     1.3    56.5    +      -       -      +
    204B  GLN*     3.2     7.8    +      -       -      +
    205B  PHE*     2.9    31.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 202 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    183B  GLU*     4.5     4.9    +      -       -      +
    187B  LYS*     6.2     3.1    -      -       -      -
    190B  ARG*     5.4     2.7    -      -       -      +
    193B  PRO      4.2    13.5    -      -       -      -
    194B  ASP*     4.8     4.4    -      -       -      +
    195B  ASP      3.3    31.3    +      -       -      +
    196B  PRO*     4.3     1.0    -      -       -      +
    198B  TYR*     3.2    17.6    +      -       -      +
    199B  ASP*     3.6    21.6    +      -       +      +
    200B  GLU      3.3     0.2    -      -       -      -
    201B  ASN*     1.3    79.4    -      -       -      +
    203B  ARG*     1.3    61.9    +      -       -      +
    205B  PHE*     3.4     7.3    +      -       -      +
    206B  GLN*     3.2    28.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 203 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    199B  ASP      3.3     7.5    +      -       -      +
    200B  GLU*     2.8    43.1    +      -       -      +
    202B  LYS*     1.3    78.0    -      -       -      +
    204B  GLN*     1.3    79.9    +      -       -      +
    206B  GLN*     3.3     7.8    +      -       +      +
    207B  GLU*     3.0    49.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 204 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    179B  ARG*     3.4    40.6    +      -       +      +
    200B  GLU*     2.9    20.1    +      -       -      +
    201B  ASN*     3.6     6.7    -      -       -      +
    203B  ARG*     1.3    94.2    -      -       -      +
    205B  PHE*     1.3    58.0    +      -       -      +
    207B  GLU*     2.9    31.7    +      -       -      +
    208B  ASP*     2.9    46.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 205 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     77B  PHE      4.3     4.7    -      -       -      -
     80B  ASP*     3.7    24.9    -      -       +      -
     81B  PHE*     3.9    18.2    -      +       -      -
    180B  ALA*     3.6    33.7    -      -       +      -
    183B  GLU*     3.4    31.4    -      -       +      +
    184B  ALA*     4.7     3.1    -      -       +      -
    187B  LYS*     3.7    24.9    -      -       -      -
    201B  ASN      2.9    17.0    +      -       -      +
    202B  LYS*     3.6     8.5    -      -       -      +
    204B  GLN*     1.3    75.8    -      -       -      +
    206B  GLN*     1.3    75.3    +      -       -      +
    208B  ASP*     3.3     6.9    +      -       -      +
    209B  ILE*     3.0    47.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 206 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     80B  ASP*     6.2     0.2    -      -       -      +
    202B  LYS*     3.2    13.8    +      -       +      +
    203B  ARG*     3.8     8.7    -      -       +      +
    205B  PHE*     1.3    97.3    -      -       -      +
    207B  GLU*     1.3    61.4    +      -       -      +
    209B  ILE*     3.4    20.5    +      -       -      +
    210B  LYS*     3.2    21.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 207 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    179B  ARG*     4.5     5.7    +      -       -      -
    203B  ARG*     3.0    40.8    +      -       -      +
    204B  GLN*     2.9    32.6    +      -       -      +
    206B  GLN*     1.3    75.6    -      -       -      +
    208B  ASP*     1.3    60.5    +      -       -      +
    210B  LYS*     3.3    10.1    +      -       -      +
    211B  VAL*     2.9    36.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 208 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    176B  SER*     2.7    43.3    +      -       -      +
    179B  ARG*     2.7    51.6    +      -       -      +
    180B  ALA*     4.2    10.0    +      -       +      -
    204B  GLN*     2.9    25.8    +      -       -      +
    205B  PHE*     3.7     7.2    -      -       -      +
    207B  GLU*     1.3    73.6    -      -       -      +
    209B  ILE*     1.3    64.7    +      -       -      +
    211B  VAL*     3.3     2.4    +      -       -      +
    212B  MET*     3.1    31.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 209 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     80B  ASP*     3.8    18.8    -      -       +      +
     81B  PHE*     3.7    22.2    -      -       +      -
    205B  PHE*     3.0    50.7    +      -       +      +
    206B  GLN*     3.6    26.9    -      -       -      +
    207B  GLU      3.4     0.2    -      -       -      -
    208B  ASP*     1.3    75.9    -      -       +      +
    210B  LYS*     1.3    58.2    +      -       -      +
    212B  MET*     3.2    10.1    +      -       +      +
    213B  ASN*     2.8    55.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 210 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    206B  GLN      3.2    12.7    +      -       -      +
    207B  GLU*     3.3    11.4    +      -       -      +
    209B  ILE*     1.3    77.2    -      -       -      +
    211B  VAL*     1.3    57.9    +      -       +      +
    213B  ASN*     4.5     5.4    -      -       +      +
    214B  ASP*     2.8    70.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 211 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    172B  PRO*     4.0    19.3    -      -       +      +
    173B  PHE*     4.1    11.4    -      -       +      +
    176B  SER*     3.5    31.4    -      -       -      +
    207B  GLU*     2.9    29.5    +      -       +      +
    208B  ASP      3.3     2.6    +      -       -      +
    210B  LYS*     1.3    74.4    -      -       +      +
    212B  MET*     1.3    63.4    +      -       -      +
    214B  ASP*     4.0     4.6    -      -       -      +
    215B  LEU*     3.2    24.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with MET 212 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     81B  PHE*     3.7    41.3    -      -       +      -
    173B  PHE*     3.6    39.1    -      -       +      +
    176B  SER*     4.5     1.8    -      -       -      +
    177B  MET*     3.7    31.0    -      -       -      +
    180B  ALA*     3.8    19.3    -      -       +      -
    208B  ASP      3.1    23.8    +      -       -      +
    209B  ILE*     3.6     6.3    -      -       -      +
    211B  VAL*     1.3    77.2    -      -       -      +
    213B  ASN*     1.3    65.5    +      -       -      +
    216B  VAL*     3.2    28.8    +      -       -      +
    259B  ILE*     4.1    16.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 213 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     81B  PHE*     4.8     1.7    -      -       -      +
    209B  ILE*     2.8    43.5    +      -       -      +
    210B  LYS*     4.0     4.8    -      -       +      +
    212B  MET*     1.3    73.4    -      -       -      +
    214B  ASP*     1.3    68.1    +      -       -      +
    217B  ASP*     2.9    35.2    +      -       -      +
    255B  ARG*     3.5    41.3    +      -       -      +
    256B  TYR*     4.7     5.3    +      -       -      -
    259B  ILE*     3.5    19.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 214 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    210B  LYS*     2.8    68.3    +      -       -      +
    211B  VAL*     4.0     4.8    -      -       -      +
    213B  ASN*     1.3    75.4    -      -       -      +
    215B  LEU*     1.3    62.5    +      -       -      +
    217B  ASP*     4.0     4.3    -      -       -      +
    218B  LYS*     3.0    26.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 215 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    158B  PHE*     4.4     9.0    -      -       +      -
    160B  TYR*     4.0    38.4    -      -       +      +
    162B  PHE*     4.2     4.5    -      -       +      -
    171B  HIS*     4.0    13.7    -      -       +      -
    173B  PHE*     3.7    36.3    -      -       +      -
    211B  VAL*     3.2    16.0    +      -       +      +
    212B  MET      4.1     2.0    -      -       -      +
    214B  ASP*     1.3    77.5    -      -       -      +
    216B  VAL*     1.3    59.3    +      -       -      +
    218B  LYS*     3.2    14.3    +      -       +      +
    219B  ILE*     2.9    37.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 216 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    158B  PHE*     4.2    15.9    -      -       +      -
    173B  PHE*     3.7    22.9    -      -       +      -
    212B  MET      3.2    17.1    +      -       -      +
    215B  LEU*     1.3    72.8    -      -       -      +
    217B  ASP*     1.3    65.5    +      -       -      +
    219B  ILE*     3.8     1.1    -      -       -      +
    220B  ILE*     2.9    25.3    +      -       +      +
    255B  ARG*     3.7    37.0    -      -       +      +
    258B  ILE*     3.7    39.9    -      -       +      -
    259B  ILE*     4.2     7.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 217 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    213B  ASN*     2.9    27.6    +      -       -      +
    214B  ASP*     4.0     4.6    -      -       -      +
    216B  VAL*     1.3    74.8    -      -       -      +
    218B  LYS*     1.3    57.2    +      -       -      +
    220B  ILE*     3.4     8.2    +      -       -      +
    221B  ALA*     2.9    30.9    +      -       -      +
    251B  ASP      4.9     1.7    -      -       -      +
    252B  GLU*     5.5     0.9    -      -       -      -
    255B  ARG*     2.8    51.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 218 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    136A  ASP*     2.2    45.3    +      -       -      -
    214B  ASP      3.0    19.9    +      -       -      +
    215B  LEU*     3.5    13.5    -      -       +      +
    217B  ASP*     1.3    77.4    -      -       -      +
    219B  ILE*     1.4    61.9    +      -       +      +
    221B  ALA*     3.2     6.0    +      -       -      +
    222B  ASP*     2.7    57.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 219 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    134A  ASN*     6.2     0.2    -      -       +      -
    158B  PHE*     3.6    51.8    -      -       +      +
    160B  TYR*     3.6    28.9    -      -       +      -
    215B  LEU*     2.9    30.0    +      -       +      +
    216B  VAL      3.2     1.5    +      -       -      +
    218B  LYS*     1.4    80.3    -      -       -      +
    220B  ILE*     1.3    65.5    +      -       -      +
    222B  ASP*     3.3    18.5    +      -       +      +
    223B  ARG*     3.0    26.0    +      -       +      +
    234B  LEU*     4.2     9.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 220 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    216B  VAL*     2.9    27.2    +      -       +      +
    217B  ASP*     3.7     7.2    -      -       -      +
    219B  ILE*     1.3    75.7    -      -       -      +
    221B  ALA*     1.3    57.9    +      -       -      +
    223B  ARG*     3.2     7.6    +      -       -      +
    224B  LYS*     2.9    36.6    +      -       +      +
    234B  LEU*     3.9    20.6    -      -       +      -
    238B  LEU*     4.5    11.0    -      -       +      -
    251B  ASP*     3.8    36.1    -      -       +      +
    254B  ILE*     3.8     9.4    -      -       +      -
    255B  ARG*     3.5    38.6    -      -       +      +
    258B  ILE*     4.2     6.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 221 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    217B  ASP      2.9    21.0    +      -       -      +
    218B  LYS*     3.6     6.7    -      -       -      +
    220B  ILE*     1.3    74.3    -      -       -      +
    222B  ASP*     1.3    64.5    +      -       -      +
    224B  LYS*     3.4     9.1    +      -       -      +
    225B  ALA*     3.0    24.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 222 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    135A  ALA*     5.6     5.0    -      -       -      +
    136A  ASP*     5.0     2.3    -      -       -      +
    218B  LYS*     2.7    56.0    +      -       -      +
    219B  ILE*     3.7    17.4    -      -       +      +
    220B  ILE      3.2     0.4    -      -       -      -
    221B  ALA*     1.3    73.7    -      -       -      +
    223B  ARG*     1.4    56.2    +      -       -      +
    225B  ALA*     3.3     7.2    +      -       -      +
    226B  SER*     2.9    30.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 223 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    158B  PHE      3.4    17.2    +      -       -      -
    159B  ASN*     3.6    13.3    -      -       -      +
    219B  ILE*     3.0    20.8    +      -       +      +
    220B  ILE      3.5     4.0    -      -       -      +
    222B  ASP*     1.4    73.0    -      -       -      +
    224B  LYS*     1.3    67.1    +      -       -      +
    226B  SER*     3.2     5.5    +      -       -      -
    227B  GLY*     3.2    21.1    +      -       -      -
    228B  GLU*     3.2    42.6    +      -       -      +
    230B  SER*     4.0     8.7    +      -       -      -
    232B  ASP*     2.8    29.7    +      -       -      -
    234B  LEU*     3.7    16.4    -      -       +      +
    235B  THR*     3.0    32.5    +      -       -      +
    238B  LEU*     3.4    20.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 224 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    220B  ILE*     2.9    23.0    +      -       +      +
    221B  ALA*     3.7     8.1    -      -       -      +
    223B  ARG*     1.3    78.8    -      -       -      +
    225B  ALA*     1.3    60.9    +      -       -      +
    227B  GLY*     3.8     7.8    +      -       -      -
    238B  LEU*     4.0    24.7    -      -       +      -
    251B  ASP*     2.8    41.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 225 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    221B  ALA      3.0    17.7    +      -       -      +
    222B  ASP*     3.7     6.7    -      -       -      +
    223B  ARG      3.3     0.2    -      -       -      -
    224B  LYS*     1.3    78.4    -      -       -      +
    226B  SER*     1.3    58.0    +      -       -      +
    227B  GLY      3.6     0.2    -      -       -      -
----------------------------------------------------------
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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  ASP      2.9    15.6    +      -       -      -
    223B  ARG*     3.2    12.0    +      -       -      -
    225B  ALA*     1.3    77.1    -      -       -      +
    227B  GLY*     1.3    60.5    +      -       -      +
    228B  GLU*     3.2    34.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 227 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    223B  ARG      3.2     8.9    +      -       -      -
    224B  LYS      3.8     5.8    +      -       -      -
    225B  ALA      3.6     2.2    -      -       -      -
    226B  SER*     1.3    77.4    +      -       -      +
    228B  GLU*     1.3    63.3    +      -       -      +
    229B  GLN*     3.3    17.9    +      -       -      +
----------------------------------------------------------
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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