Contacts of the helix formed by residues 530 - 555 (chain B) in PDB entry 3U44


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 ARG 530 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    700A  LYS*     3.1    22.9    -      -       -      +
    704A  PHE*     6.5     1.3    -      -       -      -
    708A  HIS*     6.2     0.4    -      -       -      -
    524B  ARG      4.2     6.9    +      -       -      -
    525B  ALA*     2.8    42.3    +      -       -      +
    526B  GLU      3.3     0.5    +      -       -      -
    528B  ASP*     2.7    51.9    +      -       -      +
    529B  GLY*     1.3    80.2    -      -       -      +
    531B  ILE*     1.3    63.9    +      -       -      +
    532B  ILE*     3.6     8.1    -      -       +      -
    533B  GLU*     3.5    40.9    +      -       +      +
    534B  ALA*     3.6     0.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 531 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    522B  ARG*     5.9     1.1    -      -       -      +
    526B  GLU*     4.5    29.2    -      -       +      +
    529B  GLY*     3.6    23.3    +      -       -      +
    530B  ARG*     1.3    72.8    -      -       -      +
    532B  ILE*     1.3    75.2    +      -       +      +
    533B  GLU      3.2     1.8    -      -       -      -
    534B  ALA*     2.8     7.4    +      -       +      +
    535B  GLN*     2.8    28.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 532 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1011A  ARG*     4.3    18.6    -      -       -      +
    529B  GLY      5.0     3.1    -      -       -      +
    530B  ARG*     4.6     8.1    -      -       +      -
    531B  ILE*     1.3    87.7    -      -       +      +
    533B  GLU*     1.3    61.8    +      -       -      +
    535B  GLN*     3.0    24.8    +      -       -      +
    536B  GLN*     3.3    12.1    +      -       -      +
    581B  ILE*     3.5    37.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 533 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    707A  ASN*     3.4    24.2    +      -       -      +
    708A  HIS*     3.7    21.2    +      -       -      -
    521B  GLU*     4.7     8.0    -      -       -      +
    525B  ALA*     4.3     9.1    -      -       +      +
    530B  ARG*     3.5    44.9    +      -       +      +
    531B  ILE      3.2     0.4    -      -       -      +
    532B  ILE*     1.3    80.4    -      -       -      +
    534B  ALA*     1.3    51.6    +      -       -      +
    536B  GLN*     2.9    36.7    -      -       -      +
    537B  HIS*     2.7    33.7    +      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 534 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    522B  ARG*     3.1    54.2    -      -       +      +
    525B  ALA*     3.5    14.1    -      -       +      -
    526B  GLU*     3.8    16.4    -      -       +      +
    530B  ARG      3.6     6.1    +      -       -      +
    531B  ILE*     2.8    12.7    +      -       +      +
    533B  GLU*     1.3    78.6    -      -       -      +
    535B  GLN*     1.3    60.2    +      -       -      +
    536B  GLN      3.5     0.3    +      -       -      -
    537B  HIS*     3.5    14.4    +      -       -      +
    538B  GLN      4.7     0.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 535 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1011A  ARG*     5.8     2.3    +      -       -      -
    522B  ARG*     5.6     2.9    -      -       -      +
    531B  ILE*     2.8    16.3    +      -       +      +
    532B  ILE*     3.0    19.7    +      -       -      +
    534B  ALA*     1.3    74.6    -      -       -      +
    536B  GLN*     1.3    57.8    +      -       -      +
    537B  HIS      3.1     6.0    +      -       -      -
    538B  GLN      4.2     1.0    +      -       -      -
    539B  GLN*     3.1    39.5    +      -       +      +
    579B  SER*     5.3     7.4    -      -       -      -
    581B  ILE*     5.9     1.6    -      -       -      +
    582B  PRO*     5.8     5.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 536 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    707A  ASN*     3.3    35.7    +      -       -      +
    708A  HIS*     6.0     0.4    -      -       -      -
    381B  HIS*     3.7     4.7    +      -       +      -
    532B  ILE      3.3     5.6    +      -       -      +
    533B  GLU*     2.9    36.9    +      -       -      +
    535B  GLN*     1.3    77.5    -      -       -      +
    537B  HIS*     1.3    62.4    +      -       -      +
    539B  GLN*     3.7    13.2    -      -       -      +
    540B  ALA*     2.9    29.3    +      -       -      +
    578B  PHE*     3.0    46.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with HIS 537 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    707A  ASN*     3.6    26.7    +      -       -      -
    381B  HIS*     3.5    17.8    +      +       -      +
    382B  PRO*     6.0     3.3    -      -       +      +
    518B  LEU*     4.0    24.3    -      -       +      +
    521B  GLU*     3.1    43.5    +      -       +      +
    522B  ARG*     3.9    16.4    -      -       +      -
    525B  ALA*     5.0     2.4    -      -       +      +
    533B  GLU*     2.7    38.6    +      -       +      -
    534B  ALA*     3.6    14.1    +      -       -      +
    535B  GLN      3.1     1.6    -      -       -      -
    536B  GLN*     1.3    75.3    -      -       +      +
    538B  GLN*     1.3    59.8    +      -       +      +
    539B  GLN      3.0     3.1    -      -       -      -
    540B  ALA*     2.9    26.2    +      -       -      +
    541B  TRP*     3.2     4.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 538 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1044A  TYR*     3.3    35.6    -      -       -      +
    515B  PRO*     4.0    19.6    +      -       -      +
    518B  LEU*     4.3     7.5    -      -       +      +
    519B  ASP*     4.0    29.9    +      -       -      +
    522B  ARG*     5.3    10.0    -      -       -      +
    534B  ALA      4.7     1.2    +      -       -      -
    535B  GLN      4.2     2.0    +      -       -      +
    537B  HIS*     1.3    76.9    -      -       -      +
    539B  GLN*     1.3    61.8    +      -       -      +
    540B  ALA      3.2     0.4    -      -       -      -
    541B  TRP*     3.4    28.5    +      -       +      +
    542B  ASP*     3.7    13.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 539 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    378B  MET*     4.7     1.0    -      -       -      +
    535B  GLN*     3.1    46.2    +      -       +      +
    536B  GLN*     3.7    10.9    -      -       -      +
    537B  HIS      3.0     0.2    -      -       -      -
    538B  GLN*     1.3    76.8    -      -       -      +
    540B  ALA*     1.3    62.5    +      -       -      +
    541B  TRP      3.2     0.6    +      -       -      -
    542B  ASP*     3.7     7.2    +      -       -      +
    543B  ALA*     3.6    17.2    +      -       -      +
    577B  THR      4.8     1.7    -      -       -      +
    578B  PHE*     3.6    18.0    -      -       +      +
    579B  SER*     2.7    49.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 540 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    378B  MET*     3.3    26.8    -      -       +      +
    381B  HIS*     3.6    26.7    -      -       +      +
    383B  LEU*     3.7     6.3    -      -       +      -
    384B  ILE*     5.3     0.7    -      -       +      -
    536B  GLN      2.9    13.6    +      -       -      +
    537B  HIS      2.9    13.8    +      -       -      +
    539B  GLN*     1.3    77.3    -      -       -      +
    541B  TRP*     1.3    60.3    +      -       -      +
    543B  ALA*     3.4    10.4    +      -       -      +
    544B  VAL*     3.4    19.8    +      -       -      +
    578B  PHE*     4.2     0.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with TRP 541 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1044A  TYR*     3.6    27.5    -      +       -      -
   1045A  ARG      3.2     9.9    +      -       -      -
    383B  LEU*     3.6    19.2    -      -       +      +
    506B  TYR*     4.3    20.0    -      +       -      -
    509B  LEU*     4.2    30.1    -      -       +      -
    510B  GLU*     5.2     2.2    -      -       +      -
    514B  VAL*     3.7    23.6    -      -       +      -
    515B  PRO*     3.5    31.0    -      -       +      -
    518B  LEU*     3.7    19.3    -      -       +      -
    537B  HIS      3.2     4.8    +      -       -      +
    538B  GLN*     3.4    26.9    -      -       +      +
    539B  GLN      3.2     0.2    -      -       -      -
    540B  ALA*     1.3    77.7    -      -       -      +
    542B  ASP*     1.3    67.7    +      -       -      +
    544B  VAL*     2.9    25.7    -      -       +      +
    545B  ILE*     3.0    40.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 542 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1044A  TYR      5.3     0.5    +      -       -      -
   1045A  ARG*     3.8    32.9    +      -       -      +
    538B  GLN*     3.7    11.5    +      -       -      +
    539B  GLN*     3.7     8.9    +      -       -      +
    540B  ALA      3.3     0.2    -      -       -      -
    541B  TRP*     1.3    83.5    -      -       -      +
    543B  ALA*     1.3    67.8    +      -       -      +
    545B  ILE*     3.0     7.3    +      -       -      +
    546B  GLN*     2.8    28.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 543 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    378B  MET*     3.7    27.1    -      -       +      -
    539B  GLN      3.6     7.5    +      -       -      +
    540B  ALA      3.4    10.0    +      -       -      +
    542B  ASP*     1.3    78.4    -      -       -      +
    544B  VAL*     1.3    61.9    +      -       -      +
    546B  GLN*     3.8     9.9    +      -       -      +
    547B  LEU*     3.2    22.2    +      -       -      +
    576B  LEU*     3.8    25.3    -      -       +      +
    577B  THR      5.1     2.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 544 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    383B  LEU*     4.0    14.1    -      -       +      -
    384B  ILE*     3.6    27.6    -      -       +      -
    387B  ILE*     3.9    26.7    -      -       +      -
    509B  LEU*     4.9     8.7    -      -       +      -
    540B  ALA      3.4    12.6    -      -       -      +
    541B  TRP*     2.9    28.0    -      -       +      +
    543B  ALA*     1.3    75.7    -      -       -      +
    545B  ILE*     1.3    64.8    +      -       +      +
    547B  LEU*     3.2    11.6    -      -       +      +
    548B  LEU*     3.1    33.9    +      -       +      +
    576B  LEU*     4.4     4.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 545 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1045A  ARG*     2.8    62.6    -      -       +      +
   1046A  ARG      4.6     0.4    -      -       -      -
   1047A  PRO*     4.1    16.6    -      -       +      -
    506B  TYR*     4.8    14.6    -      -       +      -
    509B  LEU*     6.3     0.9    -      -       +      -
    541B  TRP*     3.0    41.7    -      -       +      +
    542B  ASP*     3.0     7.9    +      -       -      +
    544B  VAL*     1.3    83.1    -      -       +      +
    546B  GLN*     1.3    53.0    +      -       -      +
    547B  LEU      3.0     1.3    -      -       -      -
    548B  LEU*     2.7    14.4    +      -       +      +
    549B  GLU*     2.7    42.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 546 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1045A  ARG*     4.3     5.3    -      -       -      +
     86B  PHE*     5.7     4.8    +      -       -      -
     88B  THR*     2.9    30.3    +      -       -      +
    542B  ASP*     2.8    18.3    +      -       +      +
    543B  ALA*     4.1     8.6    -      -       -      +
    545B  ILE*     1.3    75.5    -      -       -      +
    547B  LEU*     1.3    58.2    -      -       -      +
    549B  GLU*     3.6    13.4    -      -       -      +
    550B  GLU*     2.9    40.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 547 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     90B  THR*     4.6    13.9    -      -       +      +
     94B  MET*     3.5    30.0    -      -       +      +
    543B  ALA      3.2    13.7    +      -       -      +
    544B  VAL*     3.2    13.7    -      -       +      +
    545B  ILE      3.0     0.2    -      -       -      -
    546B  GLN*     1.3    79.5    -      -       -      +
    548B  LEU*     1.3    56.7    +      -       +      +
    550B  GLU*     3.9     6.1    -      -       +      +
    551B  PHE*     2.9    30.5    +      -       +      +
    569B  ILE*     4.3    28.5    -      -       +      +
    572B  GLY*     4.0    35.7    -      -       -      +
    573B  ALA*     4.5     0.9    -      -       -      +
    575B  SER*     5.6     0.2    -      -       -      +
    576B  LEU*     4.9    13.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 548 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1047A  PRO*     5.1     1.8    -      -       +      -
   1049A  PHE*     4.0    17.7    -      -       +      -
    502B  ALA*     3.7    36.8    -      -       +      +
    505B  LEU*     4.1    22.7    -      -       +      -
    506B  TYR*     4.3    24.9    -      -       +      -
    509B  LEU*     5.3     5.4    -      -       +      -
    544B  VAL*     3.1    20.0    +      -       +      +
    545B  ILE*     2.7    18.4    +      -       +      +
    547B  LEU*     1.3    72.5    -      -       +      +
    549B  GLU*     1.3    56.1    +      -       -      +
    551B  PHE*     3.1     6.9    +      -       +      +
    552B  VAL*     2.8    35.4    +      -       -      +
    565B  PHE*     5.5     0.4    -      -       +      -
    569B  ILE*     4.2    17.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 549 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1045A  ARG*     2.8    47.9    +      -       -      -
   1046A  ARG      4.0     0.2    -      -       -      +
   1047A  PRO*     3.5     5.4    -      -       +      +
   1048A  ALA*     2.7    40.9    +      -       +      +
   1049A  PHE*     4.0     4.4    -      -       +      -
    545B  ILE*     2.7    25.3    +      -       +      +
    546B  GLN*     3.6    10.9    -      -       +      +
    548B  LEU*     1.3    72.5    -      -       -      +
    550B  GLU*     1.3    58.9    +      -       +      +
    552B  VAL*     3.0    13.1    -      -       -      +
    553B  GLU*     2.8    34.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 550 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     86B  PHE      4.0     5.5    -      -       -      +
     87B  LEU*     3.7    16.7    -      -       +      +
     88B  THR*     2.7    52.3    +      -       -      +
     90B  THR*     3.6    11.1    +      -       -      -
     91B  GLY*     4.2    15.1    -      -       -      -
     94B  MET*     4.4     4.0    -      -       -      -
    546B  GLN*     2.9    37.7    +      -       +      +
    547B  LEU*     4.0     5.7    -      -       +      +
    549B  GLU*     1.3    74.1    -      -       +      +
    551B  PHE*     1.3    64.0    +      -       -      +
    553B  GLU*     3.2     9.5    +      -       +      +
    554B  MET*     3.0    29.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 551 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     94B  MET*     3.7    25.7    -      -       +      -
    498B  VAL*     3.9    26.0    -      -       +      -
    502B  ALA*     5.2     0.7    -      -       +      -
    547B  LEU      2.9    19.0    +      -       -      +
    548B  LEU*     3.1    11.9    +      -       +      +
    550B  GLU*     1.3    76.4    -      -       -      +
    552B  VAL*     1.3    58.1    -      -       +      +
    553B  GLU      3.2     0.3    +      -       -      -
    554B  MET*     4.3     0.3    -      -       -      +
    555B  MET*     3.0    55.4    +      -       +      -
    556B  GLY      3.3     2.3    +      -       -      -
    560B  ILE*     5.5     1.6    -      -       +      -
    565B  PHE*     3.7    43.7    -      +       -      -
    568B  MET*     4.0    25.4    -      -       +      -
    569B  ILE*     4.2    20.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 552 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1049A  PHE*     3.2    43.7    -      -       +      -
    498B  VAL*     4.5     0.9    -      -       +      -
    499B  GLN*     3.9    22.2    -      -       +      +
    502B  ALA*     3.7    27.6    -      -       +      -
    548B  LEU      2.8    19.4    +      -       -      +
    549B  GLU*     3.0    17.7    -      -       -      +
    551B  PHE*     1.3    72.1    -      -       +      +
    553B  GLU*     1.3    62.2    +      -       +      +
    556B  GLY*     2.9    29.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 553 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     85B  PRO*     6.1     0.3    -      -       -      +
     87B  LEU*     5.9     2.5    -      -       +      -
    180B  TYR*     2.6    36.5    +      -       +      +
    549B  GLU*     2.8    25.1    +      -       +      +
    550B  GLU*     3.3    11.7    -      -       +      +
    551B  PHE      3.1     0.4    -      -       -      -
    552B  VAL*     1.3    83.7    -      -       +      +
    554B  MET*     1.3    70.9    -      -       +      +
    556B  GLY      4.5     0.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with MET 554 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     87B  LEU*     3.9    30.7    -      -       +      -
     91B  GLY*     3.5    28.0    -      -       -      +
     94B  MET*     4.7     5.4    -      -       +      -
     95B  LEU*     3.6    38.8    -      -       +      +
     98B  LYS*     4.2    11.0    +      -       -      +
    175B  SER      5.4     2.7    -      -       -      +
    176B  LEU*     4.5     8.1    -      -       +      -
    180B  TYR*     4.3    26.0    -      -       +      -
    550B  GLU      3.0    16.3    +      -       -      +
    551B  PHE      4.3     0.7    -      -       -      +
    553B  GLU*     1.3    82.0    -      -       +      +
    555B  MET*     1.3    66.0    +      -       +      +
    556B  GLY      3.6     0.4    +      -       -      -
    558B  ASP*     4.0     4.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with MET 555 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     94B  MET*     3.5    34.3    -      -       +      +
     95B  LEU*     5.3     0.2    -      -       -      -
     97B  ARG*     5.3     1.6    -      -       -      -
     98B  LYS*     3.8    25.1    -      -       +      -
    498B  VAL*     3.1    20.8    -      -       +      +
    551B  PHE*     3.0    37.9    +      -       +      +
    554B  MET*     1.3    82.0    -      -       +      +
    556B  GLY*     1.3    65.1    +      -       -      +
    557B  ASP      3.3     2.2    -      -       -      -
    558B  ASP*     2.9    36.5    +      -       +      +
    560B  ILE*     5.7     5.2    -      -       +      -
    568B  MET*     3.5    25.6    -      -       +      +
----------------------------------------------------------
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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