Contacts of the helix formed by residues 525 - 554 (chain B) in PDB entry 4PO2


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 TYR 525 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    447B  ARG*     4.0    31.0    -      -       -      +
    521B  GLU*     3.1    42.9    +      -       -      +
    522B  ALA      3.6     3.6    -      -       -      +
    524B  LYS*     1.3   108.3    +      -       +      +
    526B  LYS*     1.3    57.4    +      -       -      +
    528B  GLU*     3.2    25.7    -      -       +      +
    529B  ASP*     3.0    31.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 526 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    522B  ALA      3.1    13.4    +      -       -      +
    523B  GLU*     3.3    38.6    -      -       -      +
    524B  LYS      3.6     1.0    +      -       -      +
    525B  TYR*     1.3    77.0    -      -       -      +
    527B  ALA*     1.3    62.4    +      -       +      +
    528B  GLU*     3.9     0.2    +      -       -      -
    529B  ASP*     3.4     6.2    +      -       -      +
    530B  GLU*     2.9    28.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 527 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    525B  TYR      3.4     0.4    -      -       -      -
    526B  LYS*     1.3    83.5    -      -       +      +
    528B  GLU*     1.3    68.2    +      -       -      +
    530B  GLU*     3.2     8.3    +      -       -      +
    531B  VAL*     2.9    34.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 528 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    524B  LYS      4.0     4.3    -      -       -      +
    525B  TYR*     3.2    40.2    -      -       +      +
    526B  LYS      3.9     0.2    +      -       -      -
    527B  ALA*     1.3    81.3    +      -       -      +
    529B  ASP*     1.3    64.8    +      -       -      +
    531B  VAL*     3.1    11.8    +      -       -      +
    532B  GLN*     2.9    28.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 529 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    446B  GLU      4.9     0.7    -      -       -      +
    447B  ARG*     2.7    48.1    +      -       -      -
    448B  ALA*     3.3    39.3    +      -       +      +
    449B  MET*     5.3     3.4    +      -       -      +
    452B  ASP*     4.7     2.9    -      -       -      +
    522B  ALA      4.8     2.6    -      -       -      +
    525B  TYR*     3.0    22.0    +      -       -      +
    526B  LYS*     3.5     7.0    -      -       -      +
    528B  GLU*     1.3    78.0    -      -       -      +
    530B  GLU*     1.3    56.8    +      -       -      +
    532B  GLN*     3.2    10.3    +      -       -      +
    533B  ARG      2.9    24.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 530 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    448B  ALA*     5.4     0.4    -      -       -      -
    526B  LYS      2.9    14.4    +      -       -      +
    527B  ALA*     3.5    10.8    -      -       -      +
    529B  ASP*     1.3    74.1    -      -       -      +
    531B  VAL*     1.3    66.4    +      -       -      +
    533B  ARG*     2.9    41.7    +      -       -      -
    534B  GLU*     2.8    50.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 531 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    527B  ALA*     2.9    20.4    +      -       +      +
    528B  GLU*     3.1    11.6    +      -       -      +
    530B  GLU*     1.3    76.6    -      -       +      +
    532B  GLN*     1.3    68.5    +      -       -      +
    534B  GLU*     3.4     6.6    +      -       -      +
    535B  ARG*     2.9    42.1    +      -       +      +
    589B  LYS*     5.8     0.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 532 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    449B  MET*     4.3    23.1    -      -       +      +
    451B  LYS*     5.9     1.5    +      -       -      -
    528B  GLU*     2.9    18.7    +      -       +      +
    529B  ASP*     3.4    12.1    -      -       -      +
    530B  GLU      3.2     0.2    -      -       -      -
    531B  VAL*     1.3    79.9    -      -       -      +
    533B  ARG*     1.3    63.4    +      -       -      +
    535B  ARG*     3.2    47.8    +      -       -      +
    536B  VAL*     2.9    33.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 533 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    409B  VAL*     4.6    22.7    -      -       +      +
    448B  ALA*     4.4    13.2    -      -       +      -
    449B  MET*     4.6     6.4    -      -       -      -
    529B  ASP      2.9    14.4    +      -       -      +
    530B  GLU*     2.9    44.2    +      -       -      +
    532B  GLN*     1.3    75.0    -      -       -      +
    534B  GLU*     1.3    71.0    +      -       -      +
    536B  VAL*     3.4     6.6    +      -       -      +
    537B  SER*     2.9    39.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 534 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    530B  GLU*     2.8    50.7    +      -       -      +
    531B  VAL*     3.8     5.5    -      -       -      +
    533B  ARG*     1.3    83.5    +      -       -      +
    535B  ARG*     1.3    67.3    +      -       -      +
    537B  SER*     3.3     8.2    +      -       -      -
    538B  ALA*     2.9    23.9    +      -       -      +
    589B  LYS*     3.2    38.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 535 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    531B  VAL*     2.9    27.1    +      -       +      +
    532B  GLN*     3.2    47.2    +      -       -      +
    534B  GLU*     1.3    75.9    -      -       -      +
    536B  VAL*     1.3    68.4    +      -       +      +
    538B  ALA*     3.2     5.2    +      -       -      +
    539B  LYS*     2.9    20.8    +      -       -      +
    586B  LEU*     4.9    12.7    +      -       -      +
    587B  ALA      3.4    27.3    +      -       -      +
    588B  GLU*     4.3    16.5    +      -       -      +
    589B  LYS*     4.2    20.7    -      -       +      +
    592B  PHE*     3.7    11.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 536 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    407B  GLY*     3.7    19.5    -      -       -      +
    409B  VAL*     3.6    22.9    -      -       +      -
    449B  MET*     3.9    23.3    -      -       +      -
    532B  GLN*     2.9    24.1    +      -       -      +
    533B  ARG      3.7     4.3    -      -       -      +
    535B  ARG*     1.3    79.5    -      -       +      +
    537B  SER*     1.3    57.9    +      -       -      +
    539B  LYS*     3.2    12.1    +      -       +      +
    540B  ASN*     2.9    45.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 537 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    533B  ARG*     2.9    28.6    +      -       -      -
    534B  GLU*     3.5     9.0    -      -       -      -
    535B  ARG      3.2     0.2    -      -       -      -
    536B  VAL*     1.3    77.3    -      -       -      +
    538B  ALA*     1.3    56.7    +      -       -      +
    540B  ASN*     3.3    10.2    +      -       -      +
    541B  ALA*     2.9    30.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 538 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    534B  GLU      2.9    13.5    +      -       -      +
    535B  ARG      3.5     7.6    -      -       -      +
    537B  SER*     1.3    75.6    +      -       -      +
    539B  LYS*     1.3    65.0    +      -       -      +
    541B  ALA*     3.3     7.1    +      -       -      +
    542B  LEU*     3.0    24.4    +      -       -      +
    589B  LYS*     4.0    21.1    -      -       +      +
    592B  PHE*     3.9    20.2    -      -       +      +
    593B  GLU*     4.2    13.0    -      -       +      +
    596B  ARG*     5.3     1.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 539 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    407B  GLY*     6.3     1.2    -      -       -      -
    431B  TYR*     4.9     2.2    +      -       -      -
    535B  ARG      2.9     8.0    +      -       -      +
    536B  VAL*     3.2    15.2    +      -       +      +
    538B  ALA*     1.3    77.3    -      -       -      +
    540B  ASN*     1.3    62.2    +      -       -      +
    542B  LEU*     3.2     3.6    +      -       -      +
    543B  GLU*     2.9    50.1    +      -       -      +
    581B  LEU*     4.2    23.0    -      -       +      +
    585B  THR*     5.3    15.9    -      -       -      +
    592B  PHE*     3.6    45.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 540 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    406B  ALA*     3.0    41.5    +      -       -      +
    407B  GLY*     4.6     1.7    +      -       -      -
    409B  VAL*     5.2     1.0    -      -       -      +
    431B  TYR*     4.6     3.1    -      -       -      -
    536B  VAL*     2.9    30.3    +      -       -      +
    537B  SER*     3.3     8.4    +      -       -      +
    539B  LYS*     1.3    80.6    +      -       -      +
    541B  ALA*     1.3    58.4    +      -       -      +
    543B  GLU*     3.7    15.7    -      -       -      +
    544B  SER*     2.9    35.5    +      -       -      -
      4D  LEU*     4.9    12.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 541 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    537B  SER*     2.9    17.4    +      -       -      +
    538B  ALA*     3.6     7.6    -      -       -      +
    539B  LYS      3.2     0.4    -      -       -      -
    540B  ASN*     1.3    76.0    -      -       -      +
    542B  LEU*     1.3    63.4    +      -       -      +
    544B  SER*     3.7     4.7    -      -       -      -
    545B  TYR*     2.9    26.0    +      -       -      +
    596B  ARG*     4.3    19.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 542 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    538B  ALA      3.0    13.1    +      -       -      +
    539B  LYS      3.6     7.6    -      -       -      +
    541B  ALA*     1.3    76.7    -      -       -      +
    543B  GLU*     1.3    57.1    +      -       -      +
    545B  TYR*     3.3     1.3    +      -       -      +
    546B  ALA*     2.9    27.7    +      -       -      +
    577B  VAL*     3.8    21.5    -      -       +      -
    580B  TRP*     3.9     4.3    -      -       +      -
    581B  LEU*     3.8    25.1    -      -       +      -
    592B  PHE*     3.7    31.4    -      -       +      +
    595B  LYS*     3.9    17.3    -      -       +      +
    596B  ARG*     3.6    39.4    -      -       +      +
    599B  LEU*     4.7     6.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 543 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    431B  TYR*     2.5    42.0    +      -       +      -
    539B  LYS*     2.9    36.2    +      -       -      +
    540B  ASN*     3.7    11.8    -      -       -      +
    542B  LEU*     1.3    73.6    -      -       -      +
    544B  SER*     1.3    66.5    +      -       -      +
    546B  ALA*     3.3     2.4    +      -       -      +
    547B  PHE*     2.9    55.0    +      -       +      -
    581B  LEU*     4.0    21.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 544 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    469B  ARG*     5.0    12.0    -      -       -      +
    540B  ASN      2.9    20.3    +      -       -      -
    541B  ALA*     3.7     5.4    -      -       -      -
    543B  GLU*     1.3    76.7    -      -       -      +
    545B  TYR*     1.3    58.0    +      -       -      +
    547B  PHE*     3.5     0.7    +      -       -      +
    548B  ASN*     2.9    45.0    +      -       -      +
      4D  LEU*     4.0    21.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 545 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    541B  ALA      2.9    17.9    +      -       -      +
    542B  LEU      3.7     3.1    -      -       -      +
    544B  SER*     1.3    75.7    -      -       -      +
    546B  ALA*     1.3    56.8    +      -       -      +
    548B  ASN*     4.0     5.1    -      -       +      +
    549B  MET*     2.9    63.5    +      -       +      +
    596B  ARG*     4.5    16.8    -      -       +      -
    599B  LEU*     3.5    32.8    -      -       +      -
    600B  GLU*     3.5    38.7    -      -       +      +
    603B  CYS*     3.9     3.2    -      -       +      +
    604B  ASN*     3.5    19.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 546 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    542B  LEU      2.9    17.9    +      -       -      +
    543B  GLU*     3.7     5.6    -      -       -      +
    545B  TYR*     1.3    78.7    -      -       -      +
    547B  PHE*     1.3    57.1    +      -       +      +
    549B  MET*     3.7     1.8    -      -       -      +
    550B  LYS*     2.9    29.3    +      -       -      +
    574B  CYS*     3.7     8.4    -      -       -      +
    577B  VAL*     3.9    19.1    -      -       +      -
    578B  ILE*     4.5    16.2    -      -       +      -
    581B  LEU*     5.2     0.2    -      -       +      -
    599B  LEU*     3.7    22.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 547 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    469B  ARG*     3.4    44.0    -      -       -      +
    543B  GLU*     2.9    50.6    +      -       +      +
    544B  SER      4.1     1.3    -      -       -      +
    546B  ALA*     1.3    76.8    -      -       +      +
    548B  ASN*     1.3    59.1    +      -       -      +
    550B  LYS*     3.4    10.3    +      -       +      +
    551B  SER*     2.9    33.1    +      -       -      -
    578B  ILE*     3.7    44.0    -      -       +      -
    581B  LEU*     5.5     2.2    -      -       +      -
    701B  SO4      4.8    11.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 548 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    468B  PRO*     6.0     0.7    -      -       -      +
    469B  ARG*     3.4    32.9    +      -       -      +
    544B  SER*     2.9    32.8    +      -       -      +
    545B  TYR*     4.0     5.1    -      -       +      +
    547B  PHE*     1.3    73.8    -      -       -      +
    549B  MET*     1.3    61.5    +      -       -      +
    551B  SER*     3.5     6.6    +      -       -      -
    552B  ALA*     2.9    28.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 549 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    545B  TYR*     2.9    55.0    +      -       +      +
    546B  ALA*     3.7     4.7    -      -       -      +
    548B  ASN*     1.3    72.7    -      -       -      +
    550B  LYS*     1.3    66.3    +      -       -      +
    552B  ALA*     3.0    18.3    +      -       +      +
    553B  VAL*     3.0    16.7    +      -       -      +
    570B  VAL*     3.6    14.4    -      -       +      -
    574B  CYS*     3.8     5.6    -      -       -      -
    599B  LEU*     5.2     0.4    -      -       +      -
    603B  CYS*     3.5    33.7    -      -       +      -
    604B  ASN*     5.4     0.9    -      -       -      +
    607B  ILE*     3.7    35.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 550 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    593A  GLU*     5.3     3.6    +      -       -      -
    546B  ALA      2.9    17.9    +      -       -      +
    547B  PHE*     3.4    12.3    -      -       +      +
    549B  MET*     1.3    78.7    -      -       -      +
    551B  SER*     1.3    61.0    +      -       -      +
    553B  VAL*     3.5     7.5    -      -       -      +
    554B  GLU*     3.2    44.3    +      -       -      +
    571B  LEU*     4.0    11.0    -      -       +      -
    574B  CYS*     3.8    17.0    -      -       +      -
    575B  GLN*     5.4     8.3    -      -       -      +
    578B  ILE*     4.2    22.7    -      -       +      -
    701B  SO4      2.6    44.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 551 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    597A  LYS*     4.8     4.4    -      -       -      +
    600A  GLU*     6.2     0.2    -      -       -      -
    433B  ASP*     4.1    12.3    +      -       -      -
    468B  PRO*     6.4     2.0    -      -       -      -
    469B  ARG*     4.7     1.6    +      -       -      -
    547B  PHE      2.9    18.4    +      -       -      -
    548B  ASN*     3.8     8.4    +      -       -      -
    550B  LYS*     1.3    76.7    -      -       -      +
    552B  ALA*     1.3    61.9    +      -       -      +
    554B  GLU*     3.3     5.7    +      -       -      +
    555B  ASP*     3.3    19.4    +      -       -      +
    701B  SO4      3.4    25.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 552 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    548B  ASN      2.9    18.4    +      -       -      +
    549B  MET*     3.0    18.3    +      -       +      +
    551B  SER*     1.3    77.6    -      -       -      +
    553B  VAL*     1.3    61.7    +      -       +      +
    555B  ASP*     3.2    22.0    -      -       -      +
    558B  LEU*     3.5    11.3    -      -       -      +
    607B  ILE*     5.2     5.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 553 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    549B  MET      3.0    14.8    +      -       -      +
    550B  LYS      3.5    11.0    -      -       -      +
    552B  ALA*     1.3    76.3    -      -       -      +
    554B  GLU*     1.3    61.2    +      -       -      +
    555B  ASP      3.3     4.8    +      -       -      +
    558B  LEU*     4.2    11.6    -      -       +      +
    562B  ILE*     4.2    22.6    -      -       +      +
    567B  LYS*     3.6    23.0    +      -       +      +
    570B  VAL*     3.6    40.4    -      -       +      -
    571B  LEU*     3.6    27.4    -      -       +      -
    607B  ILE*     4.2    20.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 554 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    593A  GLU*     5.0     8.9    -      -       -      +
    597A  LYS*     3.3    35.0    -      -       +      +
    550B  LYS*     3.2    39.2    +      -       -      +
    551B  SER      3.3     2.6    +      -       -      +
    552B  ALA      3.2     0.6    -      -       -      -
    553B  VAL*     1.3    76.9    -      -       -      +
    555B  ASP*     1.3    66.3    +      -       -      +
    556B  GLU*     3.2     4.3    +      -       -      +
    567B  LYS*     4.5    12.6    +      -       -      +
    571B  LEU*     3.8    28.8    -      -       +      +
    701B  SO4      2.9    31.7    +      -       -      -
----------------------------------------------------------
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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