Contacts of the helix formed by residues 419 - 446 (chain E) in PDB entry 6I53


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 ASP 419 (chain E).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    417E  LEU*     3.1    30.2    -      -       +      +
    418E  THR*     1.3    78.6    +      -       -      +
    420E  VAL*     1.3    65.1    +      -       -      +
    421E  ASN*     3.4     2.0    -      -       +      +
    422E  ALA*     3.4    20.8    +      -       +      +
    423E  ILE*     3.3    26.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 420 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    244E  TYR*     3.6    42.4    -      -       +      -
    302E  VAL*     3.7    21.0    -      -       +      +
    305E  ILE*     4.6     5.8    -      -       +      -
    306E  PHE*     3.6    41.3    -      -       +      +
    418E  THR      4.5     6.7    -      -       -      +
    419E  ASP*     1.3    73.0    -      -       -      +
    421E  ASN*     1.3    65.4    +      -       -      +
    422E  ALA      3.4     0.3    +      -       -      -
    423E  ILE*     3.6    13.5    +      -       +      +
    424E  ASP*     3.7    15.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 421 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    244E  TYR*     5.6     5.5    -      -       +      -
    419E  ASP*     3.4     1.9    -      -       +      +
    420E  VAL*     1.3    78.9    -      -       -      +
    422E  ALA*     1.3    57.4    +      -       -      +
    424E  ASP*     3.6     9.0    +      -       -      +
    425E  ARG*     3.1    68.1    +      -       -      +
    428E  ARG*     5.1     5.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 422 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    416E  ASP*     3.7    11.5    -      -       +      +
    417E  LEU*     4.7    10.5    -      -       +      +
    419E  ASP*     3.4    28.0    +      -       +      +
    420E  VAL      3.2     1.0    -      -       -      -
    421E  ASN*     1.3    78.3    -      -       -      +
    423E  ILE*     1.3    59.6    +      -       -      +
    425E  ARG*     3.8     7.0    -      -       -      +
    426E  TRP*     3.0    28.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 423 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    298E  GLU*     3.3    20.2    -      -       +      +
    301E  PHE*     3.8    23.1    -      -       +      -
    302E  VAL*     4.0    15.3    -      -       +      -
    305E  ILE*     3.7    31.0    -      -       +      -
    416E  ASP*     3.3    20.4    -      -       -      +
    417E  LEU      3.8    12.1    -      -       -      +
    418E  THR*     4.5     1.6    -      -       -      -
    419E  ASP      3.3    20.3    +      -       -      +
    420E  VAL*     4.1     7.0    -      -       -      +
    421E  ASN      3.3     0.4    -      -       -      -
    422E  ALA*     1.3    74.2    -      -       -      +
    424E  ASP*     1.3    61.3    +      -       -      +
    426E  TRP*     3.3     8.1    +      -       +      +
    427E  SER*     2.9    35.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 424 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    240E  PHE*     3.9    21.5    -      -       -      +
    242E  ILE      4.8     2.8    -      -       -      +
    244E  TYR*     4.5    10.2    +      -       -      +
    250E  ARG*     3.1    39.8    +      -       -      -
    298E  GLU*     3.3    14.1    -      -       -      +
    302E  VAL*     4.1     5.8    -      -       -      +
    420E  VAL*     3.7    13.8    +      -       -      +
    421E  ASN*     3.6    13.6    +      -       -      +
    422E  ALA      3.3     0.2    -      -       -      -
    423E  ILE*     1.3    78.3    -      -       -      +
    425E  ARG*     1.3    58.6    +      -       -      +
    427E  SER*     3.1     4.4    +      -       -      -
    428E  ARG*     2.9    38.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 425 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    421E  ASN*     3.1    51.5    +      -       -      +
    422E  ALA*     4.1     6.1    -      -       -      +
    424E  ASP*     1.3    74.6    -      -       -      +
    426E  TRP*     1.3    59.9    +      -       -      +
    428E  ARG*     3.9    29.2    +      -       -      +
    429E  ILE*     3.6    25.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with TRP 426 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    298E  GLU*     6.2     1.1    -      -       +      -
    415E  PRO*     4.2    34.8    +      -       +      +
    416E  ASP*     3.6    25.4    -      -       +      +
    422E  ALA      3.0    19.5    +      -       -      +
    423E  ILE*     3.5     9.6    -      -       +      +
    424E  ASP      3.1     0.2    -      -       -      -
    425E  ARG*     1.3    78.1    -      -       -      +
    427E  SER*     1.3    77.7    +      -       -      +
    429E  ILE*     3.3     6.9    +      -       +      +
    430E  VAL*     3.2    58.6    +      -       +      +
    431E  PHE*     6.0     5.8    -      +       -      -
----------------------------------------------------------
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Residues in contact with SER 427 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    240E  PHE*     3.6    36.8    -      -       -      -
    298E  GLU*     3.4    18.9    +      -       -      +
    423E  ILE*     2.9    20.3    +      -       -      +
    424E  ASP      3.1     1.5    +      -       -      -
    426E  TRP*     1.3    86.7    -      -       -      +
    428E  ARG*     1.3    63.8    +      -       -      +
    429E  ILE      3.2     2.1    +      -       -      -
    430E  VAL*     4.1     5.6    -      -       -      +
    431E  PHE*     3.6    30.4    +      -       -      +
    432E  PRO*     3.9     1.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 428 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    309A  TYR*     4.1    15.6    +      -       -      -
    240E  PHE*     2.8    43.1    +      -       +      -
    241E  TRP*     3.5    68.0    +      -       +      +
    242E  ILE      5.5     0.4    +      -       -      -
    421E  ASN*     5.1     5.3    +      -       -      -
    424E  ASP*     2.9    24.0    +      -       -      +
    425E  ARG*     4.1    30.9    -      -       -      +
    426E  TRP      3.3     0.8    -      -       -      -
    427E  SER*     1.3    77.3    -      -       -      +
    429E  ILE*     1.3    61.9    +      -       +      +
    432E  PRO*     3.4    21.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 429 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    425E  ARG      3.6    17.7    -      -       -      +
    426E  TRP*     3.3     6.9    +      -       +      +
    427E  SER      3.2     0.4    -      -       -      -
    428E  ARG*     1.3    85.3    -      -       +      +
    430E  VAL*     1.3    68.4    +      -       +      +
    431E  PHE      3.6     0.4    -      -       -      -
    432E  PRO*     3.8     3.6    -      -       -      +
    433E  PHE*     3.3    23.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 430 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    426E  TRP*     3.2    60.6    +      -       +      +
    427E  SER*     4.7     2.7    -      -       -      -
    429E  ILE*     1.3    81.6    -      -       +      +
    431E  PHE*     1.3    67.9    +      -       +      +
    433E  PHE*     2.9     8.0    +      -       +      +
    434E  THR*     2.6    51.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 431 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    237E  TRP*     3.2    33.5    -      +       +      +
    240E  PHE*     3.4    36.1    -      +       +      -
    291E  PHE*     4.9    18.0    -      +       +      -
    294E  LEU*     4.1    42.0    -      -       +      -
    295E  ALA*     4.1     6.7    -      -       +      -
    298E  GLU*     4.6     7.9    -      -       +      -
    426E  TRP*     6.0     5.6    -      +       -      -
    427E  SER*     3.6    16.8    +      -       -      +
    430E  VAL*     1.3    96.4    -      -       +      +
    432E  PRO*     1.3    66.7    -      -       +      +
    434E  THR*     4.4     6.3    -      -       +      +
    435E  PHE*     3.2    17.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with PRO 432 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    237E  TRP*     3.8    35.7    -      -       +      -
    240E  PHE*     6.2     0.4    -      -       +      -
    427E  SER      3.9     1.6    -      -       -      +
    428E  ARG*     3.4    31.6    -      -       -      +
    429E  ILE      3.8     3.4    -      -       -      +
    431E  PHE*     1.3    91.2    -      -       +      +
    433E  PHE*     1.3    56.4    +      -       -      +
    436E  SER*     3.0    23.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 433 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    429E  ILE*     3.3    21.6    +      -       +      +
    430E  VAL*     2.9     7.7    +      -       +      +
    432E  PRO*     1.3    78.3    -      -       -      +
    434E  THR*     1.3    66.7    +      -       -      +
    436E  SER*     2.7    21.3    +      -       -      -
    437E  LEU*     2.9    37.1    +      -       +      +
    508E  POV      4.5    12.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with THR 434 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    291E  PHE*     3.6    23.3    -      -       +      -
    430E  VAL*     2.6    38.0    +      -       -      +
    431E  PHE*     4.6     5.6    -      -       +      -
    433E  PHE*     1.3    76.1    -      -       -      +
    435E  PHE*     1.3    54.3    +      -       -      +
    437E  LEU*     3.1    13.8    +      -       +      +
    438E  PHE*     2.7    32.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 435 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    230E  ILE*     4.2    22.9    -      -       +      -
    233E  THR*     3.8    22.0    -      -       +      -
    234E  ILE*     5.0     2.2    -      -       +      -
    237E  TRP*     3.5    28.3    -      +       +      -
    284E  TYR*     4.1     6.5    -      -       -      -
    288E  CYS*     3.6    30.3    -      -       -      -
    291E  PHE*     3.6    36.0    -      +       +      -
    431E  PHE      3.2    18.6    +      -       -      +
    434E  THR*     1.3    75.6    -      -       -      +
    436E  SER*     1.3    65.5    +      -       -      +
    438E  PHE*     3.6     8.1    -      +       -      +
    439E  ASN*     3.2    46.0    +      -       -      -
    508E  POV      4.5     9.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 436 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    432E  PRO      3.0    19.1    +      -       -      -
    433E  PHE*     2.7    24.8    +      -       -      -
    435E  PHE*     1.3    80.3    -      -       -      +
    437E  LEU*     1.3    60.5    +      -       -      +
    439E  ASN*     3.7     8.3    +      -       -      +
    440E  LEU*     3.3    20.6    +      -       -      +
    508E  POV      3.8    47.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 437 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    433E  PHE*     2.9    40.1    +      -       +      +
    434E  THR*     3.4    14.4    -      -       +      +
    436E  SER*     1.3    76.7    +      -       -      +
    438E  PHE*     1.3    63.2    +      -       -      +
    440E  LEU*     3.4    17.6    +      -       +      +
    441E  VAL*     3.2    34.9    +      -       +      +
    508E  POV      5.3     4.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 438 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    283E  MET*     4.2    13.0    -      -       +      -
    284E  TYR*     3.9    27.1    -      +       -      -
    287E  GLY*     3.7    34.3    -      -       -      -
    288E  CYS*     4.5     1.6    -      -       -      -
    291E  PHE*     3.7    27.6    -      +       +      -
    434E  THR      2.7    18.4    +      -       -      +
    435E  PHE*     3.6    12.3    -      +       -      +
    436E  SER      3.3     0.4    -      -       -      -
    437E  LEU*     1.3    74.5    -      -       -      +
    439E  ASN*     1.3    67.0    +      -       -      +
    441E  VAL*     3.5     6.2    +      -       +      +
    442E  TYR*     3.0    34.1    +      +       +      +
----------------------------------------------------------
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Residues in contact with ASN 439 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    284E  TYR*     3.1    34.9    +      -       -      -
    435E  PHE*     3.2    44.5    +      -       -      +
    436E  SER*     4.1     4.5    -      -       -      +
    437E  LEU      3.3     0.2    -      -       -      -
    438E  PHE*     1.3    77.3    -      -       -      +
    440E  LEU*     1.3    60.6    +      -       -      +
    442E  TYR*     4.2     1.8    -      -       -      -
    443E  TRP*     2.9    48.1    +      -       +      +
    508E  POV      3.4    40.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 440 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    436E  SER      3.3    15.7    +      -       -      +
    437E  LEU*     3.8    19.7    -      -       +      +
    438E  PHE      3.3     0.6    -      -       -      -
    439E  ASN*     1.3    77.0    -      -       -      +
    441E  VAL*     1.3    64.8    +      -       +      +
    443E  TRP*     5.4     0.4    -      -       -      -
    444E  LEU*     3.3    47.7    +      -       +      +
    508E  POV      4.4    41.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 441 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    437E  LEU*     3.2    29.4    +      -       +      +
    438E  PHE*     4.0     7.0    -      -       +      +
    440E  LEU*     1.3    77.6    -      -       +      +
    442E  TYR*     1.3    64.1    +      -       -      +
    444E  LEU*     3.6     1.2    +      -       -      +
    445E  TYR*     3.1    28.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 442 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    145E  LEU*     4.5     4.8    -      -       +      +
    226E  TYR*     2.9    33.0    +      +       -      -
    280E  ALA*     2.3    37.6    +      -       +      +
    283E  MET*     5.0     5.8    -      -       +      -
    284E  TYR*     3.6    37.4    -      +       +      +
    438E  PHE*     3.0    28.6    +      +       +      +
    439E  ASN*     3.9     4.9    -      -       -      +
    440E  LEU      3.4     0.4    -      -       -      -
    441E  VAL*     1.3    79.1    -      -       -      +
    443E  TRP*     1.3    86.2    +      +       -      +
    444E  LEU      3.1     5.0    +      -       -      -
    445E  TYR*     3.4     1.5    +      -       -      -
    446E  TYR*     3.4    57.9    +      +       -      +
----------------------------------------------------------
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Residues in contact with TRP 443 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    145E  LEU*     4.1    23.8    -      -       +      -
    218E  ILE*     5.5     3.1    -      -       +      -
    222E  ILE*     5.1     4.0    -      -       +      -
    226E  TYR*     3.7    48.2    -      +       +      -
    230E  ILE*     5.6     0.9    -      -       +      +
    284E  TYR*     4.5     4.3    +      +       -      -
    439E  ASN*     2.9    51.5    +      -       +      +
    440E  LEU      5.2     0.2    -      -       -      +
    442E  TYR*     1.3    87.5    -      +       -      +
    444E  LEU*     1.3    60.6    +      -       -      +
    447E  VAL*     3.4    40.0    -      -       +      +
    508E  POV      3.1    96.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 444 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    440E  LEU*     3.3    44.3    +      -       +      +
    441E  VAL*     3.6     2.1    +      -       -      +
    442E  TYR      3.1     0.8    -      -       -      -
    443E  TRP*     1.3    84.5    -      -       +      +
    445E  TYR*     1.3    64.2    +      -       -      +
    446E  TYR      3.5     0.4    -      -       -      -
    447E  VAL*     4.4    10.4    +      -       +      +
    508E  POV      4.2    12.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 445 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    142E  ARG*     3.9    18.1    +      -       -      -
    441E  VAL*     3.1    22.8    +      -       +      +
    442E  TYR*     3.4     3.1    +      -       -      +
    444E  LEU*     1.3    79.8    -      -       -      +
    446E  TYR*     1.3    97.2    +      +       +      +
    447E  VAL      5.1     0.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 446 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    141E  ARG      4.3     9.4    +      -       -      -
    142E  ARG*     2.4    48.0    +      -       +      +
    145E  LEU*     3.7    31.2    -      -       +      +
    279E  LYS      4.6     0.9    +      -       -      -
    280E  ALA*     3.6    28.4    -      -       +      -
    283E  MET*     4.1    24.9    -      -       +      +
    442E  TYR*     3.4    50.2    +      +       -      +
    445E  TYR*     1.3   108.1    -      +       +      +
    447E  VAL*     1.3    62.8    +      -       -      +
----------------------------------------------------------
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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