Contacts of the helix formed by residues 483 - 506 (chain D) in PDB entry 1JIQ


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 THR 483 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    557C  VAL*     4.1    29.2    -      -       +      -
     48D  HIS      4.5     6.5    +      -       -      +
    171D  LEU*     4.0     3.1    -      -       -      -
    174D  TYR*     3.5    15.9    -      -       +      +
    481D  LYS*     3.0    15.3    +      -       +      +
    482D  LEU*     1.3    77.1    -      -       -      +
    484D  PRO*     1.3    77.5    -      -       -      +
    485D  PHE*     3.8     7.7    +      -       -      +
    486D  MET*     3.1    21.9    +      -       -      +
    487D  LEU*     3.0    22.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with PRO 484 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    171D  LEU*     3.8    30.9    -      -       +      -
    174D  TYR*     3.6    31.0    -      -       +      -
    292D  ASN*     3.5    45.8    -      -       +      +
    295D  GLN*     4.1     6.1    -      -       +      -
    296D  LEU*     3.4    16.6    -      -       -      +
    483D  THR*     1.3    89.2    -      -       -      +
    485D  PHE*     1.3    62.2    +      -       -      +
    487D  LEU*     3.4     0.5    +      -       -      +
    488D  GLY      3.1    17.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 485 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46D  THR*     3.4    34.5    -      -       +      -
     48D  HIS*     3.3    47.6    -      +       +      -
    295D  GLN*     3.3    38.9    +      -       +      +
    298D  SER*     3.6    15.7    -      -       -      -
    299D  GLY*     3.3    32.5    -      -       -      -
    302D  TRP*     3.8    19.3    -      +       +      -
    483D  THR*     3.2     6.8    +      -       -      +
    484D  PRO*     1.3    79.6    -      -       -      +
    486D  MET*     1.3    68.8    +      -       +      +
    488D  GLY      3.2     1.9    +      -       -      -
    489D  ALA*     3.0    20.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with MET 486 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46D  THR*     4.3     6.5    -      -       +      +
     48D  HIS      4.2     5.4    -      -       -      +
     49D  GLY*     3.8    37.5    -      -       -      +
     50D  HIS      4.0     5.2    -      -       -      +
     51D  ILE*     3.6    36.1    -      -       +      -
    479D  PHE*     3.8    24.7    -      -       +      -
    480D  THR      4.7     1.6    -      -       -      +
    481D  LYS      3.2    29.6    -      -       -      +
    482D  LEU*     4.4     0.7    -      -       -      -
    483D  THR*     3.1    13.6    +      -       -      +
    485D  PHE*     1.3    77.9    -      -       +      +
    487D  LEU*     1.3    66.7    +      -       -      +
    489D  ALA*     3.2     6.0    +      -       -      +
    490D  LEU*     2.9    35.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 487 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    166D  MET*     4.4     6.5    -      -       -      -
    167D  VAL*     3.9    26.2    -      -       +      -
    170D  ALA*     3.9    11.7    -      -       +      -
    171D  LEU*     3.8    30.1    -      -       +      -
    296D  LEU*     4.2     4.7    -      -       +      -
    345D  LEU*     3.9    27.4    -      -       +      -
    348D  PHE*     4.5     5.2    -      -       +      -
    482D  LEU*     4.1    17.1    -      -       +      +
    483D  THR      3.0    16.1    +      -       -      +
    484D  PRO      3.7     3.8    -      -       -      +
    486D  MET*     1.3    75.3    -      -       -      +
    488D  GLY*     1.3    58.3    +      -       -      +
    490D  LEU*     3.2     4.9    +      -       +      +
    491D  VAL*     2.9    50.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 488 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    277D  TRP*     3.7    10.7    -      -       -      -
    296D  LEU*     3.5    33.1    -      -       -      +
    300D  ALA*     3.5     9.2    -      -       -      -
    484D  PRO      3.1     7.9    +      -       -      -
    485D  PHE      3.2     2.2    +      -       -      -
    487D  LEU*     1.3    79.3    -      -       -      +
    489D  ALA*     1.3    60.4    +      -       -      +
    491D  VAL      3.5     0.2    +      -       -      -
    492D  ALA*     3.0    26.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 489 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46D  THR*     5.0     0.9    -      -       +      -
     51D  ILE*     4.5    11.9    -      -       +      -
    299D  GLY*     3.4    23.0    -      -       -      +
    302D  TRP*     5.0     4.0    -      -       +      -
    303D  MET*     3.6    24.5    -      -       +      +
    485D  PHE*     3.0    18.6    +      -       +      +
    486D  MET*     3.5    11.9    -      -       -      +
    488D  GLY*     1.3    77.6    -      -       -      +
    490D  LEU*     1.3    61.4    +      -       -      +
    493D  MET*     3.0    23.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 490 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     51D  ILE*     4.4    16.4    -      -       +      -
    345D  LEU*     5.6     2.9    -      -       +      -
    348D  PHE*     4.7    14.8    -      -       +      -
    407D  LEU*     5.0     6.3    -      -       +      -
    477D  ILE*     4.3     9.4    -      -       +      -
    479D  PHE*     3.7    48.9    -      -       +      -
    482D  LEU*     4.0    13.2    -      -       +      -
    486D  MET*     2.9    27.0    +      -       +      +
    487D  LEU*     3.2     5.6    +      -       +      +
    489D  ALA*     1.3    77.1    -      -       -      +
    491D  VAL*     1.3    62.3    +      -       -      +
    493D  MET*     3.3    26.2    -      -       +      +
    494D  TYR*     3.3    27.8    +      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 491 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    166D  MET*     3.9    24.2    -      -       +      -
    167D  VAL*     5.5     1.3    -      -       +      -
    276D  LEU*     4.7     3.6    -      -       +      -
    277D  TRP*     3.5    28.5    -      -       +      -
    296D  LEU*     6.0     0.4    -      -       +      -
    348D  PHE*     4.0    13.7    -      -       +      -
    351D  TYR*     4.0    17.9    -      -       +      +
    352D  PHE*     3.8    20.7    -      -       +      -
    487D  LEU*     2.9    29.2    +      -       +      +
    490D  LEU*     1.3    75.5    -      -       -      +
    492D  ALA*     1.3    62.5    +      -       -      +
    494D  TYR*     3.2     3.5    +      -       -      -
    495D  GLU*     3.0    24.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 492 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    104D  ARG*     3.8    18.6    -      -       -      +
    277D  TRP*     4.4     0.8    -      -       -      -
    300D  ALA*     3.8    19.7    -      -       +      +
    303D  MET*     3.9    13.0    -      -       +      -
    304D  ASP*     4.1     2.5    -      -       -      +
    488D  GLY      3.0    18.5    +      -       -      +
    489D  ALA      3.8     3.1    -      -       -      +
    491D  VAL*     1.3    73.6    -      -       -      +
    493D  MET*     1.3    65.4    +      -       -      +
    495D  GLU*     3.2    13.8    +      -       -      +
    496D  HIS*     3.0    29.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with MET 493 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     44D  LEU*     5.6     0.2    -      -       -      -
     51D  ILE*     5.1     3.1    -      -       -      -
     53D  VAL*     4.4     9.9    -      -       -      -
    303D  MET*     3.6    29.1    -      -       +      +
    316D  ALA*     4.1    14.4    -      -       -      -
    317D  PRO*     3.5    18.7    -      -       -      +
    320D  LEU*     3.7    31.4    -      -       +      -
    477D  ILE*     3.9    20.9    -      -       +      -
    489D  ALA      3.0    14.0    +      -       -      +
    490D  LEU*     3.3    31.9    -      -       +      +
    491D  VAL      3.2     0.2    -      -       -      -
    492D  ALA*     1.3    77.7    -      -       -      +
    494D  TYR*     1.3    73.4    +      -       +      +
    496D  HIS      3.3     0.3    +      -       -      -
    497D  LYS*     3.0    24.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 494 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    320D  LEU*     4.8     6.1    -      -       +      -
    338D  MET*     3.7    28.7    -      -       +      +
    348D  PHE*     4.1    21.1    -      +       -      -
    352D  PHE*     3.4    26.5    -      +       +      -
    356D  ASP*     6.2     0.2    -      -       -      -
    405D  ASP*     2.8    39.4    +      -       -      +
    407D  LEU*     3.9    11.4    -      -       +      +
    477D  ILE*     3.7    15.3    -      -       +      +
    490D  LEU*     3.3    19.6    +      -       +      -
    491D  VAL      3.2     2.8    +      -       -      +
    493D  MET*     1.3    96.6    -      -       +      +
    495D  GLU*     1.3    59.0    +      -       -      +
    497D  LYS*     3.2    30.9    +      -       +      +
    498D  ILE*     2.8    39.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 495 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    100D  HIS*     3.7     5.1    -      -       -      +
    104D  ARG*     2.7    39.7    +      -       -      +
    274D  TYR*     3.5    39.6    +      -       +      -
    277D  TRP*     2.9    28.1    +      -       -      -
    351D  TYR*     4.2    11.1    +      -       +      +
    352D  PHE*     4.3     6.2    -      -       +      -
    491D  VAL*     3.0    20.6    +      -       +      +
    492D  ALA*     3.2     9.8    +      -       -      +
    494D  TYR*     1.3    75.1    -      -       -      +
    496D  HIS*     1.3    64.1    +      -       -      +
    498D  ILE*     3.3    11.5    +      -       -      +
    499D  PHE*     3.0    25.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 496 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     84D  MET*     4.1    14.8    -      -       +      +
     85D  PHE*     4.4     1.3    -      +       -      -
    100D  HIS*     4.6     6.2    +      -       -      -
    101D  VAL*     3.8    19.7    -      -       +      +
    104D  ARG*     3.8     7.9    +      -       -      -
    303D  MET*     4.4     4.5    -      -       +      -
    304D  ASP*     2.6    37.1    +      -       -      -
    307D  PHE*     3.3    46.6    -      +       +      -
    317D  PRO*     3.7    18.8    -      -       +      -
    492D  ALA      3.0    22.5    +      -       -      +
    495D  GLU*     1.3    77.2    -      -       +      +
    497D  LYS*     1.3    64.1    +      -       -      +
    499D  PHE*     3.1     6.1    +      -       -      +
    500D  VAL*     2.9    28.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 497 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    317D  PRO*     3.6    17.8    -      -       +      +
    320D  LEU*     3.9    25.8    +      -       +      +
    321D  ALA*     3.6    19.3    -      -       -      +
    324D  GLY*     5.3     3.5    -      -       -      -
    336D  HIS*     3.3    42.4    +      -       -      -
    356D  ASP*     4.7     7.8    +      -       -      +
    405D  ASP*     4.4     2.8    +      -       -      -
    493D  MET      3.0    14.4    +      -       -      +
    494D  TYR*     3.2    28.8    +      -       +      +
    496D  HIS*     1.3    74.4    -      -       -      +
    498D  ILE*     1.3    68.1    +      -       +      +
    500D  VAL      3.2     1.7    +      -       -      -
    501D  GLN*     3.1    50.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 498 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    274D  TYR*     3.7    11.7    -      -       +      +
    352D  PHE*     3.8    19.5    -      -       +      -
    355D  GLY      3.6     8.3    -      -       -      +
    356D  ASP*     3.5    44.6    -      -       +      +
    359D  SER*     3.7    24.9    -      -       -      -
    360D  ASN*     3.0    36.6    +      -       -      +
    494D  TYR*     2.8    22.5    +      -       +      +
    495D  GLU*     3.4     7.9    -      -       -      +
    497D  LYS*     1.3    82.0    -      -       +      +
    499D  PHE*     1.3    61.9    +      -       -      +
    501D  GLN*     3.5     3.5    +      -       -      +
    502D  GLY*     3.0    10.2    +      -       -      -
    509D  SER*     3.9     2.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 499 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     77D  VAL*     4.5     3.8    -      -       +      -
     80D  ALA*     3.6    26.7    -      -       +      -
     81D  ARG*     3.7    23.8    -      -       +      -
     84D  MET*     3.9    21.8    -      -       +      -
     90D  ILE*     4.0    16.8    -      -       +      -
    307D  PHE*     3.9    20.4    -      +       -      -
    495D  GLU      3.0    14.0    +      -       -      +
    496D  HIS*     3.1    13.0    +      -       -      +
    498D  ILE*     1.3    78.0    -      -       -      +
    500D  VAL*     1.3    62.4    +      -       +      +
    502D  GLY*     3.3     2.3    +      -       -      -
    503D  ILE*     3.0    59.9    +      -       +      +
    509D  SER*     4.6     5.9    +      -       -      -
    510D  PHE*     3.6    29.4    -      +       +      -
----------------------------------------------------------
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Residues in contact with VAL 500 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     72D  ALA*     5.4     0.4    -      -       +      -
     77D  VAL*     4.1    23.6    -      -       +      -
    307D  PHE*     3.8    30.3    -      -       +      -
    318D  VAL*     4.1    20.9    -      -       +      +
    321D  ALA*     3.4    25.4    -      -       +      -
    322D  LEU*     5.3     0.4    -      -       +      -
    496D  HIS      2.9    20.3    +      -       -      +
    497D  LYS      3.2     0.2    +      -       -      -
    499D  PHE*     1.3    74.8    -      -       +      +
    501D  GLN*     1.3    65.9    +      -       -      +
    503D  ILE*     3.3     6.9    +      -       -      +
    504D  ILE*     3.0    38.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 501 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    321D  ALA*     3.1    31.3    -      -       +      +
    324D  GLY*     3.5    20.1    -      -       -      -
    325D  ILE*     4.0    12.6    -      -       +      -
    328D  ILE*     4.3     2.9    -      -       -      +
    356D  ASP*     4.7    10.7    +      -       -      -
    360D  ASN*     4.3     6.7    -      -       -      +
    377D  PRO*     4.8     5.7    -      -       -      +
    497D  LYS*     3.1    41.4    +      -       -      +
    498D  ILE*     3.9     5.9    -      -       -      +
    500D  VAL*     1.3    77.3    -      -       -      +
    502D  GLY*     1.3    57.4    +      -       -      +
    504D  ILE*     3.3     2.5    +      -       -      +
    505D  TRP*     2.9    65.0    +      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 502 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    360D  ASN*     3.9     3.1    -      -       -      +
    498D  ILE      3.0    11.5    +      -       -      -
    499D  PHE      3.7     0.7    -      -       -      -
    500D  VAL      3.3     0.4    -      -       -      -
    501D  GLN*     1.3    75.0    -      -       -      +
    503D  ILE*     1.3    57.1    +      -       -      +
    505D  TRP*     3.3     1.4    +      -       -      -
    506D  ASP      2.9    23.4    +      -       -      -
    507D  ILE*     3.0    32.8    +      -       -      +
    509D  SER*     3.5    23.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 503 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     75D  ARG*     3.0    38.8    +      -       -      +
     77D  VAL*     4.1    18.2    -      -       +      -
     80D  ALA*     3.5    30.1    -      -       +      -
     83D  ARG*     5.7     0.9    -      -       -      +
     90D  ILE*     6.0     1.1    -      -       +      -
    499D  PHE*     3.0    46.7    +      -       +      +
    500D  VAL*     3.6     7.2    -      -       -      +
    501D  GLN      3.3     0.2    -      -       -      -
    502D  GLY*     1.3    76.5    -      -       -      +
    504D  ILE*     1.3    63.7    +      -       -      +
    506D  ASP*     3.1     8.2    +      -       -      +
    507D  ILE      5.2     3.4    -      -       -      +
    510D  PHE*     6.1     1.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 504 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      4D  LEU*     3.7    32.0    -      -       +      +
     71D  LEU*     4.2    11.7    -      -       +      -
     72D  ALA*     4.4     5.6    -      -       -      -
     75D  ARG*     2.8    37.0    +      -       +      +
     77D  VAL*     4.0    17.3    -      -       +      -
    322D  LEU*     3.6    31.0    -      -       +      -
    325D  ILE*     4.1    25.8    -      -       +      -
    500D  VAL*     3.0    32.3    +      -       +      +
    501D  GLN      3.7     4.3    -      -       -      +
    503D  ILE*     1.3    77.3    -      -       -      +
    505D  TRP*     1.3    59.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with TRP 505 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      2D  ALA*     5.7     0.2    -      -       -      +
      4D  LEU*     3.8    10.8    +      -       +      +
    325D  ILE*     3.5    21.1    -      -       +      +
    328D  ILE*     3.7    22.7    -      -       +      -
    329D  ASN*     2.7    25.2    +      -       -      -
    360D  ASN*     3.7    20.6    -      -       +      -
    365D  THR*     4.2     4.5    -      -       -      +
    373D  HIS*     3.6    41.1    +      +       +      -
    374D  GLN      3.4     8.1    +      -       -      -
    375D  THR*     3.5    33.4    -      -       +      -
    376D  GLY*     3.5    18.8    -      -       -      -
    501D  GLN*     2.9    45.6    +      -       +      +
    502D  GLY*     4.2     2.5    -      -       -      -
    504D  ILE*     1.3    75.0    -      -       -      +
    506D  ASP*     1.3    67.7    +      -       -      +
    507D  ILE*     3.4    22.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 506 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      3D  ALA*     3.6    26.3    -      -       +      +
     75D  ARG*     3.5    17.1    +      -       -      +
     92D  TYR*     3.6     2.3    +      -       -      -
    365D  THR*     3.2    13.1    +      -       +      -
    366D  LYS*     2.9    63.2    +      -       -      +
    367D  SER*     4.4     4.5    +      -       -      -
    502D  GLY      2.9     6.0    +      -       -      -
    503D  ILE*     3.1    10.3    +      -       -      +
    504D  ILE      3.2     0.2    -      -       -      -
    505D  TRP*     1.3    81.3    -      -       -      +
    507D  ILE*     1.3    60.0    +      -       -      +
----------------------------------------------------------
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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