Contacts of the helix formed by residues 482 - 505 (chain B) in PDB entry 1KOJ


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 482 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    556A  ILE*     5.6     8.3    -      -       +      -
     47B  HIS      4.8     4.0    +      -       -      +
    170B  LEU*     4.0     3.8    -      -       -      -
    173B  TYR*     3.5    15.0    -      -       +      +
    480B  LYS*     3.1    28.8    +      -       +      +
    481B  LEU*     1.3    75.6    -      -       -      +
    483B  PRO*     1.3    76.8    -      -       -      +
    484B  PHE*     3.1     8.4    +      -       -      +
    485B  ILE*     3.2    25.5    +      -       +      +
    486B  LEU*     2.9    24.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with PRO 483 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    170B  LEU*     3.8    27.1    -      -       +      -
    173B  TYR*     3.5    39.3    -      -       +      -
    291B  ASN*     3.5    39.0    -      -       +      +
    294B  GLN*     3.9     8.1    -      -       +      -
    295B  LEU*     3.2    19.1    -      -       -      +
    482B  THR*     1.3    88.1    -      -       -      +
    484B  PHE*     1.3    55.2    +      -       -      +
    486B  LEU*     3.8     0.2    -      -       -      +
    487B  GLY      3.1    21.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 484 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45B  THR*     3.4    30.5    -      -       +      -
     47B  HIS*     3.7    42.8    -      +       +      -
    294B  GLN*     3.5    33.9    +      -       +      +
    297B  SER*     3.5    15.9    -      -       -      -
    298B  GLY*     3.2    44.3    -      -       -      -
    301B  TRP*     3.7    22.7    -      +       +      -
    482B  THR*     3.1     7.5    +      -       -      +
    483B  PRO*     1.3    77.9    -      -       -      +
    485B  ILE*     1.3    73.7    +      -       +      +
    487B  GLY      3.2     0.9    +      -       -      -
    488B  ALA*     3.0    20.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 485 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45B  THR*     4.2     9.0    -      -       +      +
     47B  HIS      3.7    21.8    -      -       -      +
     48B  GLY*     4.2    13.9    -      -       -      -
     49B  HIS      5.0     1.6    -      -       -      +
     50B  ILE*     4.4    18.2    -      -       +      -
    478B  PHE*     3.9    23.1    -      -       +      -
    479B  THR      5.8     0.2    -      -       -      +
    480B  LYS      3.4    28.9    -      -       -      +
    481B  LEU*     4.8     1.1    -      -       -      -
    482B  THR*     3.2    14.8    +      -       +      +
    484B  PHE*     1.3    81.5    -      -       +      +
    486B  LEU*     1.3    67.4    +      -       -      +
    488B  ALA*     3.1     5.2    +      -       +      +
    489B  LEU*     2.9    37.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 486 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    165B  MET*     4.6     3.6    -      -       -      -
    166B  VAL*     4.0    23.1    -      -       +      -
    169B  ALA*     3.9    15.9    -      -       +      -
    170B  LEU*     3.9    28.5    -      -       +      -
    295B  LEU*     4.3     2.5    -      -       +      -
    344B  LEU*     4.1    22.9    -      -       +      -
    347B  PHE*     4.5     9.9    -      -       +      -
    481B  LEU*     4.1    16.0    -      -       +      +
    482B  THR      2.9    18.1    +      -       -      +
    483B  PRO      3.8     3.1    -      -       -      +
    485B  ILE*     1.3    77.1    -      -       -      +
    487B  GLY*     1.3    62.9    -      -       -      +
    489B  LEU*     3.0     8.2    +      -       +      +
    490B  ILE*     2.9    47.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 487 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    276B  TRP*     3.6    10.6    -      -       -      -
    295B  LEU*     3.6    34.0    -      -       -      +
    299B  ALA*     3.5     9.2    -      -       -      -
    483B  PRO      3.1     8.9    +      -       -      -
    484B  PHE      3.2     1.3    +      -       -      -
    486B  LEU*     1.3    79.8    -      -       -      +
    488B  ALA*     1.3    56.3    +      -       -      +
    490B  ILE*     3.5     0.6    +      -       -      -
    491B  ALA*     3.0    29.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 488 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45B  THR*     5.4     0.7    -      -       +      -
     50B  ILE*     4.4    11.9    -      -       +      -
    298B  GLY*     3.2    23.6    -      -       -      +
    301B  TRP*     4.9     6.1    -      -       +      -
    302B  MET*     3.5    26.5    -      -       +      +
    484B  PHE*     3.0    17.2    +      -       +      +
    485B  ILE*     3.1     9.6    +      -       -      +
    487B  GLY*     1.3    75.5    -      -       -      +
    489B  LEU*     1.3    58.8    +      -       -      +
    491B  ALA      3.4     0.5    +      -       -      -
    492B  MET*     2.8    29.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 489 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     50B  ILE*     4.3    14.8    -      -       +      -
    344B  LEU*     5.7     3.1    -      -       +      -
    347B  PHE*     4.9    14.1    -      -       +      -
    406B  LEU*     4.8     7.6    -      -       +      -
    476B  ILE*     4.2     9.6    -      -       +      -
    478B  PHE*     3.7    43.5    -      -       +      -
    481B  LEU*     4.3    10.3    -      -       +      -
    485B  ILE*     2.9    30.7    +      -       +      +
    486B  LEU*     3.5     9.2    -      -       +      +
    488B  ALA*     1.3    74.7    -      -       -      +
    490B  ILE*     1.3    66.1    +      -       -      +
    492B  MET*     3.2    27.1    +      -       +      +
    493B  TYR*     3.2    28.6    +      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 490 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    165B  MET*     3.9    23.3    -      -       +      -
    166B  VAL*     4.0    13.5    -      -       +      -
    275B  LEU*     4.5     3.8    -      -       +      -
    276B  TRP*     3.6    32.1    -      -       +      -
    295B  LEU*     4.7     1.8    -      -       +      -
    347B  PHE*     4.5     5.6    -      -       +      -
    350B  TYR*     3.9    16.8    -      -       +      +
    351B  PHE*     3.5    22.7    -      -       +      -
    486B  LEU*     2.9    45.9    +      -       +      +
    487B  GLY*     3.9     1.8    -      -       -      +
    489B  LEU*     1.3    74.2    -      -       -      +
    491B  ALA*     1.3    62.7    +      -       -      +
    493B  TYR      3.3     1.6    +      -       -      -
    494B  GLU*     3.0    32.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 491 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    103B  ARG*     3.8    15.0    -      -       -      +
    276B  TRP*     4.5     0.8    -      -       -      -
    299B  ALA*     3.8    17.5    -      -       +      +
    302B  MET*     3.7    18.8    -      -       +      -
    303B  ASP*     4.1     1.8    -      -       -      +
    487B  GLY      3.0    19.0    +      -       -      +
    488B  ALA      3.6     4.5    -      -       -      +
    489B  LEU      3.2     0.2    -      -       -      -
    490B  ILE*     1.3    74.2    -      -       -      +
    492B  MET*     1.3    65.8    +      -       -      +
    494B  GLU*     3.2    13.2    +      -       -      +
    495B  HIS*     3.1    28.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with MET 492 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     43B  LEU*     5.6     0.7    -      -       -      -
     50B  ILE*     5.2     9.2    -      -       -      -
     52B  LEU*     5.4     4.9    -      -       -      -
    302B  MET*     3.7    29.6    -      -       +      -
    315B  ALA*     4.2    13.5    -      -       -      -
    316B  PRO*     3.5    22.1    -      -       +      +
    319B  LEU*     3.9    29.2    -      -       +      -
    476B  ILE*     4.0    20.9    -      -       +      -
    488B  ALA      2.8    16.8    +      -       -      +
    489B  LEU*     3.4    33.2    -      -       +      +
    490B  ILE      3.2     0.2    -      -       -      -
    491B  ALA*     1.3    77.6    -      -       -      +
    493B  TYR*     1.3    69.2    +      -       +      +
    495B  HIS*     3.3     0.9    +      -       -      -
    496B  LYS*     3.0    23.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 493 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    319B  LEU*     4.1    18.6    -      -       +      -
    337B  VAL*     5.1     8.9    -      -       +      +
    347B  PHE*     3.6    38.6    -      +       -      -
    351B  PHE*     3.3    35.7    -      +       +      -
    404B  ASP*     2.7    36.5    +      -       +      +
    406B  LEU*     3.7    12.6    -      -       +      +
    476B  ILE*     3.4    19.0    -      -       +      +
    489B  LEU*     3.2    11.9    +      -       +      -
    491B  ALA      3.3     0.2    -      -       -      -
    492B  MET*     1.3    81.4    -      -       +      +
    494B  GLU*     1.3    65.7    +      -       -      +
    496B  LYS*     3.1    24.0    +      -       +      +
    497B  ILE*     3.0    27.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 494 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99B  HIS*     3.7     7.8    +      -       -      +
    103B  ARG*     2.7    36.1    +      -       -      -
    273B  TYR*     3.5    42.4    +      -       +      -
    276B  TRP*     3.0    27.1    +      -       -      -
    350B  TYR*     4.2     7.6    +      -       -      +
    351B  PHE*     4.2     6.2    -      -       +      -
    490B  ILE*     3.0    28.2    +      -       +      +
    491B  ALA*     3.2     7.3    +      -       -      +
    493B  TYR*     1.3    76.8    -      -       -      +
    495B  HIS*     1.3    61.8    +      -       -      +
    497B  ILE*     3.3    10.2    +      -       -      +
    498B  PHE*     3.0    23.9    +      -       -      +
    509B  PHE*     6.2     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with HIS 495 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     83B  MET*     3.8    25.5    -      -       +      +
     84B  PHE*     4.3     1.1    -      +       -      -
     99B  HIS*     4.8     6.2    +      -       -      -
    100B  VAL*     3.9    11.9    -      -       +      -
    103B  ARG*     3.7     7.6    +      -       -      -
    302B  MET*     4.4     5.6    -      -       +      -
    303B  ASP*     2.7    35.4    +      -       -      -
    306B  PHE*     3.4    43.3    -      +       +      -
    316B  PRO*     3.6    19.7    -      -       +      -
    491B  ALA      3.1    20.5    +      -       -      +
    494B  GLU*     1.3    77.4    +      -       +      +
    496B  LYS*     1.3    64.7    +      -       -      +
    498B  PHE*     3.4     5.9    -      -       -      +
    499B  VAL*     2.9    29.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 496 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    316B  PRO*     3.5    17.4    -      -       +      +
    319B  LEU*     3.6    32.4    +      -       +      +
    320B  ALA*     3.4    21.1    -      -       -      +
    323B  GLY*     5.2     2.0    -      -       -      -
    335B  GLN*     3.8    33.1    +      -       -      +
    355B  ASP*     4.8    10.9    +      -       -      +
    404B  ASP*     4.8     7.7    +      -       -      -
    492B  MET      3.0    14.4    +      -       -      +
    493B  TYR*     3.1    27.7    +      -       +      +
    495B  HIS*     1.3    76.2    -      -       -      +
    497B  ILE*     1.3    65.9    +      -       +      +
    499B  VAL      3.3     0.3    +      -       -      -
    500B  GLN*     3.1    44.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 497 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    273B  TYR*     3.7    11.9    -      -       +      +
    351B  PHE*     4.1    18.4    -      -       +      -
    354B  GLY*     3.7     6.3    -      -       -      +
    355B  ASP*     3.6    46.7    -      -       +      +
    358B  SER*     3.6    25.1    -      -       -      -
    359B  ASN*     3.0    36.4    +      -       -      +
    493B  TYR*     3.0    19.5    +      -       +      +
    494B  GLU*     3.4    10.5    -      -       -      +
    496B  LYS*     1.3    81.1    -      -       +      +
    498B  PHE*     1.3    60.1    +      -       -      +
    500B  GLN*     3.6     4.7    +      -       -      +
    501B  GLY*     3.1    10.4    +      -       -      -
    508B  SER*     4.1     1.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 498 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     76B  VAL*     4.6     2.9    -      -       +      -
     79B  ALA*     3.6    26.0    -      -       +      -
     80B  ARG*     3.7    23.1    -      -       +      -
     83B  MET*     4.0    21.8    -      -       +      -
     89B  ILE*     4.0     8.7    -      -       +      -
    273B  TYR*     5.8     0.4    -      -       -      +
    306B  PHE*     3.8    26.2    -      +       -      -
    494B  GLU      3.0    13.4    +      -       -      +
    495B  HIS*     3.2    13.4    +      -       -      +
    497B  ILE*     1.3    74.8    -      -       -      +
    499B  VAL*     1.3    68.7    +      -       -      +
    501B  GLY*     3.2     3.3    +      -       -      -
    502B  VAL*     3.0    47.0    +      -       +      +
    508B  SER*     4.7     4.6    +      -       -      -
    509B  PHE*     3.4    39.3    -      +       +      -
----------------------------------------------------------
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Residues in contact with VAL 499 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     76B  VAL*     3.9    25.6    -      -       +      -
    306B  PHE*     3.7    29.4    -      -       +      -
    316B  PRO      4.3     0.9    -      -       -      +
    317B  VAL*     4.0    23.3    -      -       +      -
    320B  ALA*     3.5    22.0    -      -       +      -
    321B  MET*     4.3    15.5    -      -       -      -
    495B  HIS      2.9    21.1    +      -       -      +
    496B  LYS      3.3     0.2    +      -       -      -
    498B  PHE*     1.3    78.7    -      -       -      +
    500B  GLN*     1.3    63.5    +      -       -      +
    502B  VAL*     3.1     7.3    +      -       -      +
    503B  VAL*     3.0    21.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 500 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    320B  ALA*     3.1    32.4    +      -       +      +
    323B  GLY*     3.6    22.4    -      -       -      -
    324B  ILE*     3.8    11.5    -      -       +      +
    327B  ILE*     4.4     8.5    -      -       -      +
    355B  ASP*     4.5    11.4    -      -       -      +
    359B  ASN*     4.1     5.6    -      -       -      +
    376B  PRO*     4.9     3.9    -      -       -      +
    496B  LYS*     3.1    38.7    +      -       -      +
    497B  ILE*     3.9     6.0    -      -       -      +
    499B  VAL*     1.3    77.4    -      -       -      +
    501B  GLY*     1.3    63.3    +      -       -      +
    503B  VAL*     3.2     4.2    +      -       -      +
    504B  TRP*     2.9    55.9    +      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 501 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    359B  ASN*     3.9     4.4    +      -       -      -
    497B  ILE      3.1    11.3    +      -       -      -
    498B  PHE      3.2     1.3    +      -       -      -
    500B  GLN*     1.3    76.1    -      -       -      +
    502B  VAL*     1.3    56.9    +      -       -      +
    504B  TRP*     3.3     1.8    +      -       -      -
    505B  ASP      2.9    22.3    +      -       -      -
    506B  ILE*     3.0    30.2    +      -       -      +
    508B  SER*     3.3    24.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 502 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     74B  ARG*     3.0    35.2    +      -       -      +
     76B  VAL*     4.0    17.7    -      -       +      -
     79B  ALA*     3.7    33.7    -      -       +      -
    365B  LYS*     6.1     3.4    -      -       -      +
    498B  PHE*     3.0    36.2    +      -       +      +
    499B  VAL*     3.5     8.7    -      -       -      +
    501B  GLY*     1.3    75.4    -      -       -      +
    503B  VAL*     1.3    64.5    +      -       -      +
    505B  ASP*     3.0    12.4    +      -       -      +
    506B  ILE      5.2     1.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 503 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      3B  LEU*     3.9    28.2    -      -       +      +
     70B  LEU*     4.4    12.3    -      -       +      +
     71B  ALA*     4.6     2.2    -      -       -      -
     74B  ARG*     3.0    34.9    +      -       +      +
     76B  VAL*     4.2    16.2    -      -       +      -
    321B  MET*     4.0    26.0    -      -       +      -
    324B  ILE*     4.1    21.8    -      -       +      -
    499B  VAL      3.0    17.5    +      -       -      +
    500B  GLN*     3.2    10.5    +      -       -      +
    502B  VAL*     1.3    76.6    -      -       -      +
    504B  TRP*     1.3    60.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with TRP 504 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      1B  ALA*     5.8     0.2    -      -       -      +
      3B  LEU*     3.7    15.6    +      -       +      +
    324B  ILE*     3.4    22.6    -      -       +      +
    327B  ILE*     3.8    27.1    -      -       +      -
    328B  ASN*     2.8    20.0    +      -       -      -
    359B  ASN*     3.8    14.8    -      -       +      -
    364B  THR*     4.0     9.2    -      -       -      +
    372B  HIS*     3.7    33.8    +      +       +      -
    373B  GLN      3.3     8.5    +      -       -      -
    374B  THR*     3.5    37.2    -      -       +      -
    375B  GLY*     3.4    15.7    -      -       -      -
    376B  PRO*     4.3     0.4    -      -       +      -
    500B  GLN*     2.9    44.6    +      -       +      +
    501B  GLY      3.9     3.1    -      -       -      +
    503B  VAL*     1.3    74.9    -      -       -      +
    505B  ASP*     1.3    70.2    +      -       -      +
    506B  ILE*     3.4    24.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 505 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      2B  ALA*     3.8    21.4    +      -       +      +
     74B  ARG*     3.2    21.5    +      -       -      +
    364B  THR*     3.2    20.5    +      -       +      -
    365B  LYS*     2.9    43.4    +      -       -      +
    366B  SER*     4.3    10.4    +      -       -      -
    501B  GLY      2.9     4.9    +      -       -      -
    502B  VAL*     3.0    11.5    +      -       -      +
    503B  VAL      3.2     0.2    -      -       -      -
    504B  TRP*     1.3    81.3    -      -       -      +
    506B  ILE*     1.3    60.2    +      -       -      +
----------------------------------------------------------
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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