Contacts of the helix formed by residues 383 - 409 (chain D) in PDB entry 1S77


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 ALA 383 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    380D  ALA      4.3    11.8    +      -       -      +
    381D  ALA*     3.5     1.5    -      -       -      -
    382D  ALA*     1.3    75.4    -      -       -      +
    384D  VAL*     1.3    54.4    +      -       -      +
    385D  TYR      3.1     0.7    -      -       -      -
    386D  ARG*     2.5    43.8    +      -       +      +
    387D  LYS*     3.0     6.7    +      -       +      +
    660D  ASP*     4.3    22.2    -      -       +      +
     16N    T      6.1     0.7    -      -       -      -
     17N    A      5.6     0.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 384 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    358D  GLU*     3.1    46.2    -      -       +      +
    360D  LEU      5.5     0.2    -      -       -      -
    361D  PRO*     3.7    42.6    -      -       +      -
    381D  ALA      4.3     6.5    -      -       -      +
    382D  ALA      2.8     1.8    -      -       -      -
    383D  ALA*     1.3    77.2    -      -       -      +
    385D  TYR*     1.3    60.2    +      -       +      +
    386D  ARG      2.8     0.5    +      -       -      -
    387D  LYS*     3.0    16.6    +      -       -      +
    388D  ASP*     2.7    35.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 385 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    361D  PRO*     3.4    32.3    -      -       +      +
    382D  ALA*     3.6    14.6    -      -       +      +
    383D  ALA*     3.1     0.6    -      -       -      -
    384D  VAL*     1.3    76.5    -      -       +      +
    386D  ARG*     1.3    56.7    +      -       -      +
    388D  ASP*     5.0     2.9    -      -       -      +
    389D  LYS*     3.3    25.1    +      -       -      +
     15N    T      4.6     1.9    +      -       -      -
     16N    T      3.0    88.4    +      +       +      +
     17N    A      6.3     0.4    -      -       -      -
    110T    T      5.1     9.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 386 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    383D  ALA*     2.5    27.5    +      -       +      +
    385D  TYR*     1.3    72.8    -      -       -      +
    387D  LYS*     1.3    64.1    +      -       +      +
    389D  LYS*     3.1    20.3    -      -       -      +
    390D  ALA*     3.3     7.6    +      -       -      +
    652D  GLU*     3.6    22.4    +      -       -      -
    656D  GLN*     3.9    27.7    -      -       -      +
    660D  ASP*     4.3    14.5    +      -       -      +
     16N    T      5.2     2.0    +      -       -      +
     17N    A      5.3    18.4    -      -       +      +
      5R    G      4.5    16.8    +      -       -      -
      6R    G      3.8    39.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 387 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    358D  GLU*     3.2    47.5    +      -       -      +
    383D  ALA*     3.0     6.4    +      -       +      +
    384D  VAL*     3.0    19.1    +      -       -      +
    386D  ARG*     1.3    83.4    -      -       +      +
    388D  ASP*     1.3    60.5    +      -       -      +
    390D  ALA*     3.4     8.7    +      -       -      +
    391D  ARG*     3.1    25.8    +      -       +      +
    660D  ASP*     5.4    13.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 388 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    357D  ARG*     2.9    48.1    -      -       -      +
    358D  GLU*     3.1    20.2    -      -       -      +
    384D  VAL*     2.7    22.0    +      -       +      +
    385D  TYR*     5.0     2.7    -      -       -      +
    387D  LYS*     1.3    72.8    -      -       -      +
    389D  LYS*     1.3    64.3    +      -       -      +
    391D  ARG*     3.2    23.5    +      -       -      -
    392D  LYS*     3.0    23.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 389 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    385D  TYR      3.3    17.1    +      -       -      +
    386D  ARG*     3.1    14.3    +      -       -      +
    388D  ASP*     1.3    81.9    -      -       -      +
    390D  ALA*     1.3    62.0    +      -       -      +
    392D  LYS*     3.6     5.5    +      -       -      +
    393D  SER*     3.3    18.0    +      -       -      -
      6R    G      3.6    35.0    +      -       -      +
      7R    C      5.4     8.1    -      -       -      +
    111T    T      2.9    48.5    +      -       +      +
    112T    G      5.2     1.0    -      -       -      -
    113T    T      4.3    19.7    +      -       -      -
    114T    G      5.3     8.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 390 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    386D  ARG*     3.3     5.7    +      -       -      +
    387D  LYS*     3.5    11.0    -      -       -      +
    388D  ASP      3.2     0.2    -      -       -      -
    389D  LYS*     1.3    78.0    -      -       -      +
    391D  ARG*     1.3    54.9    +      -       -      +
    393D  SER*     3.1     2.8    +      -       -      -
    394D  ARG*     2.7    54.6    +      -       -      +
      5R    G      3.4    25.4    -      -       -      +
      6R    G      3.0    18.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 391 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    353D  PRO*     3.7    13.5    -      -       +      +
    354D  ALA*     2.9    23.6    +      -       -      +
    355D  ILE      2.4    27.5    +      -       -      -
    356D  GLU*     2.9    29.8    +      -       -      +
    357D  ARG*     4.1     7.3    -      -       -      +
    358D  GLU*     5.0     3.4    -      -       -      -
    387D  LYS*     3.1    16.1    +      -       +      +
    388D  ASP*     3.2    38.3    +      -       -      +
    389D  LYS      3.4     0.2    -      -       -      -
    390D  ALA*     1.3    76.1    -      -       -      +
    392D  LYS*     1.3    82.7    +      -       -      +
    394D  ARG*     3.1    10.0    +      -       -      +
    395D  ARG*     2.6    42.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 392 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    388D  ASP*     3.0    21.3    +      -       -      +
    389D  LYS*     3.9     5.8    -      -       -      +
    391D  ARG*     1.3    97.1    -      -       -      +
    393D  SER*     1.3    59.7    +      -       -      +
    395D  ARG*     3.6     6.9    -      -       -      +
    396D  ILE*     3.2    43.1    +      -       +      +
    111T    T      5.2     8.3    +      -       -      +
    112T    G      4.7    11.9    +      -       -      -
    113T    T      5.2    19.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 393 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    389D  LYS      3.3    10.7    +      -       -      -
    390D  ALA      3.1     7.2    +      -       -      -
    392D  LYS*     1.3    77.8    -      -       -      +
    394D  ARG*     1.3    66.5    +      -       -      +
    395D  ARG      3.0     1.6    -      -       -      -
    396D  ILE*     3.2    18.3    +      -       -      +
    397D  SER*     3.4    13.0    +      -       -      -
      5R    G      4.4    11.9    +      -       -      -
      6R    G      4.1    28.8    +      -       -      -
    113T    T      5.6     4.9    -      -       -      -
    114T    G      4.9    14.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 394 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    351D  ASP*     2.8    32.6    +      -       -      -
    353D  PRO*     3.8    27.8    -      -       +      +
    390D  ALA*     2.7    42.7    +      -       -      +
    391D  ARG*     3.6     6.3    -      -       -      +
    393D  SER*     1.3    73.4    -      -       -      +
    395D  ARG*     1.3    58.4    +      -       -      +
    397D  SER*     3.0    19.0    +      -       -      +
    398D  LEU*     3.4    12.5    +      -       -      +
      4R    C      3.3    32.7    +      -       -      +
      5R    G      3.4    32.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 395 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    342D  THR*     3.0    32.9    +      -       -      -
    343D  LYS*     4.7     4.8    -      -       -      +
    352D  ILE*     4.4     1.2    -      -       -      +
    353D  PRO*     2.5    45.5    +      -       +      +
    354D  ALA      3.8    16.8    -      -       -      +
    355D  ILE*     3.3    28.0    -      -       -      +
    391D  ARG*     2.6    23.0    +      -       +      +
    392D  LYS*     3.6     9.9    -      -       -      +
    394D  ARG*     1.3    77.5    -      -       -      +
    396D  ILE*     1.3    66.2    +      -       +      +
    398D  LEU*     3.2    31.7    +      -       -      +
    399D  GLU*     3.0    49.6    +      -       -      +
    402D  LEU*     5.9     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 396 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    392D  LYS*     3.2    36.7    +      -       +      +
    393D  SER*     3.5    12.3    -      -       -      +
    395D  ARG*     1.3    77.4    -      -       +      +
    397D  SER*     1.3    60.5    +      -       -      +
    399D  GLU*     3.4     8.2    +      -       +      +
    400D  PHE*     3.0    26.5    +      -       +      +
    113T    T      6.1     1.6    -      -       -      -
    114T    G      4.1    36.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 397 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    393D  SER      3.4     9.5    +      -       -      -
    394D  ARG*     3.0    19.8    +      -       -      +
    396D  ILE*     1.3    79.5    -      -       -      +
    398D  LEU*     1.3    54.8    +      -       -      +
    400D  PHE*     3.5     6.9    -      -       -      +
    401D  MET*     2.7    54.4    +      -       -      +
    437D  ASN*     5.7     3.3    +      -       -      -
      4R    C      6.1     0.7    -      -       -      -
      5R    G      4.8     5.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 398 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    342D  THR*     4.4     6.3    -      -       +      -
    352D  ILE*     3.8    22.0    -      -       +      -
    353D  PRO*     3.4    32.8    -      -       +      -
    394D  ARG      3.4     9.6    +      -       -      +
    395D  ARG*     3.2    42.5    +      -       -      +
    397D  SER*     1.3    80.5    +      -       -      +
    399D  GLU*     1.3    66.5    +      -       +      +
    401D  MET*     3.8     5.2    -      -       -      +
    402D  LEU*     2.9    44.4    +      -       +      +
    437D  ASN*     6.0     4.9    -      -       -      +
    439D  MET*     3.9    16.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 399 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    355D  ILE*     5.5     1.6    -      -       -      +
    395D  ARG*     3.0    53.3    +      -       -      +
    396D  ILE*     3.9     7.4    -      -       +      +
    398D  LEU*     1.3    80.6    -      -       +      +
    400D  PHE*     1.3    60.8    +      -       -      +
    402D  LEU*     4.2     3.4    -      -       +      -
    403D  GLU*     2.8    49.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 400 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46D  MET*     4.9     8.5    -      -       +      -
    267D  MET*     4.7    12.6    -      -       +      -
    268D  PHE      5.3     2.7    -      -       -      -
    269D  GLN*     6.3     0.9    -      -       +      -
    396D  ILE*     3.0    16.7    +      -       +      +
    397D  SER*     3.5     8.7    -      -       -      +
    399D  GLU*     1.3    76.9    -      -       -      +
    401D  MET*     1.3    89.7    +      -       +      +
    403D  GLU*     3.2     6.2    +      -       +      +
    404D  GLN*     3.0    55.8    +      -       +      +
    431D  MET*     3.4    57.4    -      -       +      -
    432D  PHE      4.2     2.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with MET 401 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    397D  SER*     2.7    53.2    +      -       -      +
    398D  LEU*     3.8     4.0    -      -       -      +
    400D  PHE*     1.3    96.5    -      -       +      +
    402D  LEU*     1.3    57.8    +      -       -      +
    404D  GLN*     3.3     3.3    +      -       -      +
    405D  ALA*     2.9    28.9    +      -       -      +
    431D  MET*     3.8     9.0    -      -       +      +
    432D  PHE*     3.6    43.8    -      -       +      -
    437D  ASN*     5.7     3.4    -      -       -      +
    439D  MET*     4.0    12.8    -      -       +      -
    440D  THR*     3.2    28.0    -      -       -      +
    443D  LEU*     5.3     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 402 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    335D  LEU*     3.9    23.1    -      -       +      -
    338D  ALA*     3.8    16.4    -      -       +      +
    339D  ASN*     3.5    21.1    -      -       -      +
    342D  THR*     3.6    26.9    -      -       +      +
    395D  ARG*     5.9     0.2    -      -       -      +
    398D  LEU*     2.9    31.0    +      -       +      +
    399D  GLU*     3.8     7.4    -      -       +      +
    401D  MET*     1.3    78.0    -      -       -      +
    403D  GLU*     1.3    67.5    +      -       -      +
    405D  ALA*     3.4     2.2    +      -       -      +
    406D  ASN*     3.1    29.8    +      -       -      -
    439D  MET*     3.9    16.6    -      -       +      -
    443D  LEU*     4.0     7.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 403 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    339D  ASN*     5.1     1.0    +      -       -      -
    399D  GLU*     2.8    44.3    +      -       -      +
    400D  PHE*     3.2     8.0    +      -       +      +
    402D  LEU*     1.3    83.5    -      -       -      +
    404D  GLN*     1.3    62.8    +      -       +      +
    406D  ASN*     3.4    14.0    +      -       -      +
    407D  LYS*     2.8    30.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 404 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46D  MET*     5.3     5.3    -      -       -      +
    268D  PHE      5.1     0.5    -      -       -      +
    269D  GLN*     3.2    28.0    +      -       -      +
    270D  PRO*     3.5    15.4    -      -       -      +
    400D  PHE*     3.0    52.2    +      -       +      +
    401D  MET      3.5     4.5    -      -       -      +
    403D  GLU*     1.3    76.5    -      -       +      +
    405D  ALA*     1.3    65.4    +      -       -      +
    407D  LYS*     3.1    15.6    +      -       -      +
    408D  PHE*     2.9    46.6    +      -       +      +
    432D  PHE*     3.7    22.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 405 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    330D  ILE*     3.6    20.1    -      -       +      +
    335D  LEU*     3.8    20.4    -      -       +      -
    401D  MET      2.9    17.4    +      -       -      +
    402D  LEU*     3.6     6.3    -      -       -      +
    403D  GLU      3.3     0.2    -      -       -      -
    404D  GLN*     1.3    77.3    -      -       -      +
    406D  ASN*     1.3    57.7    +      -       -      +
    408D  PHE      3.2     2.6    +      -       -      -
    409D  ALA*     2.9    26.2    +      -       -      +
    432D  PHE*     4.0     9.6    -      -       +      -
    443D  LEU*     3.8    21.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 406 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    335D  LEU*     3.1    20.5    -      -       -      +
    339D  ASN*     2.8    43.5    +      -       -      +
    402D  LEU      3.1    24.8    +      -       -      +
    403D  GLU*     4.0    13.3    +      -       -      +
    405D  ALA*     1.3    73.1    -      -       -      +
    407D  LYS*     1.3    66.6    +      -       -      +
    408D  PHE      3.3     0.3    +      -       -      -
    409D  ALA*     3.5    12.1    +      -       -      +
    410D  ASN*     5.3     2.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 407 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     39D  LEU*     4.3     6.5    -      -       -      -
     42D  GLU*     2.9    36.3    +      -       -      -
     46D  MET*     4.6     2.6    -      -       -      +
    269D  GLN*     2.8    23.7    +      -       -      +
    403D  GLU      2.8    18.6    +      -       -      +
    404D  GLN*     3.1    23.5    +      -       -      +
    406D  ASN*     1.3    79.2    -      -       -      +
    408D  PHE*     1.3    75.0    +      -       +      +
    409D  ALA      4.2     2.1    -      -       -      +
    411D  HIS*     4.0    13.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 408 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     35D  GLU*     5.5     0.4    -      -       -      -
     39D  LEU*     3.7    36.1    -      -       +      -
    269D  GLN*     4.0    11.0    -      -       +      -
    270D  PRO*     3.4    35.4    -      -       +      -
    272D  VAL*     4.2     6.5    -      -       +      -
    330D  ILE*     3.3    21.6    +      -       +      +
    404D  GLN*     2.9    44.2    +      -       +      +
    407D  LYS*     1.3    94.7    -      -       +      +
    409D  ALA*     1.3    65.6    +      -       -      +
    411D  HIS*     3.4    38.7    +      +       -      +
    414D  ILE*     4.1    23.1    -      -       +      +
    432D  PHE*     5.1     2.2    -      +       -      -
----------------------------------------------------------
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Residues in contact with ALA 409 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    330D  ILE*     3.6    14.4    -      -       +      -
    332D  LYS*     3.8    17.9    -      -       +      +
    335D  LEU*     3.8    21.3    -      -       +      -
    405D  ALA      2.9    13.2    +      -       -      +
    406D  ASN*     3.9     8.8    -      -       -      +
    407D  LYS      3.5     4.3    -      -       -      +
    408D  PHE*     1.3    84.4    -      -       -      +
    410D  ASN*     1.3    75.4    +      -       -      +
    411D  HIS*     2.8     7.6    +      -       -      -
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


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

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

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