Contacts of the helix formed by residues 555 - 581 (chain B) in PDB entry 3E7C


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 SER 555 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    553B  PRO      4.2     0.4    +      -       -      -
    554B  ASP*     1.3    75.8    -      -       -      +
    556B  THR*     1.3    64.8    +      -       -      +
    557B  TRP*     3.0    22.1    +      -       -      +
    558B  ARG*     3.1    25.6    +      -       -      +
    559B  ILE*     3.2    14.2    +      -       -      +
    636B  LEU*     4.3    10.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with THR 556 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      2B  866      5.3     0.9    -      -       +      -
    555B  SER*     1.3    71.8    -      -       -      +
    557B  TRP*     1.3    63.5    +      -       -      +
    559B  ILE*     3.5     4.5    +      -       -      +
    560B  MET*     2.9    55.4    +      -       +      +
    636B  LEU*     3.7    13.6    -      -       -      +
    637B  PRO*     2.5    50.6    +      -       -      +
    638B  GLY*     4.9     4.5    -      -       -      +
    639B  MET*     4.4    13.9    -      -       -      -
    735B  TYR*     5.6     0.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with TRP 557 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    555B  SER*     3.0    10.4    +      -       -      +
    556B  THR*     1.3    80.0    -      -       -      +
    558B  ARG*     1.3   102.6    +      -       +      +
    560B  MET*     3.7    14.0    -      -       +      +
    561B  THR*     2.9    55.0    +      -       +      -
    745B  MET      5.9     0.4    -      -       -      -
    746B  SER*     2.6    33.6    +      -       -      -
    747B  ILE*     4.0     5.8    -      -       +      +
    748B  GLU*     5.9     1.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 558 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    548B  TYR*     3.3    33.7    +      -       +      +
    549B  ASP*     3.0    39.0    +      -       -      +
    552B  VAL*     2.8    45.2    +      -       -      +
    553B  PRO      2.9    18.2    +      -       -      -
    554B  ASP*     3.8     0.2    +      -       -      -
    555B  SER*     3.1    19.0    +      -       -      +
    557B  TRP*     1.3   100.8    -      -       +      +
    559B  ILE*     1.3    58.8    +      -       -      +
    561B  THR*     3.4     2.1    +      -       -      -
    562B  THR*     2.8    37.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 559 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    548B  TYR*     3.5    25.6    -      -       +      +
    554B  ASP*     4.1     7.2    -      -       +      -
    555B  SER      3.2     9.6    +      -       -      +
    556B  THR*     4.1     4.3    -      -       -      +
    558B  ARG*     1.3    74.1    -      -       -      +
    560B  MET*     1.3    60.5    +      -       -      +
    562B  THR*     3.2     3.0    +      -       -      -
    563B  LEU*     2.8    55.7    +      -       +      +
    627B  LEU*     4.3     9.0    -      -       +      -
    629B  ILE*     3.8    19.1    -      -       +      -
    633B  ARG*     4.0    21.5    -      -       +      -
    636B  LEU*     3.5    32.1    -      -       +      -
    639B  MET*     3.9    13.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 560 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      2B  866      4.0    42.1    -      -       +      -
    556B  THR*     2.9    46.8    +      -       +      +
    557B  TRP*     3.7    19.7    -      -       +      +
    559B  ILE*     1.3    76.8    -      -       -      +
    561B  THR*     1.3    57.4    +      -       -      +
    563B  LEU*     3.3     5.1    +      -       -      +
    564B  ASN*     2.9    34.5    +      -       -      +
    639B  MET*     5.3     1.8    -      -       -      -
    735B  TYR*     5.7     1.3    -      -       -      -
    739B  THR*     4.4    17.5    -      -       +      -
    745B  MET*     4.8    17.9    -      -       +      -
    747B  ILE*     3.9    20.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 561 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    557B  TRP*     2.9    39.3    +      -       +      -
    558B  ARG*     3.8     5.6    -      -       -      -
    559B  ILE      3.2     0.2    -      -       -      -
    560B  MET*     1.3    75.1    -      -       -      +
    562B  THR*     1.3    65.7    +      -       -      +
    564B  ASN*     3.3     3.5    +      -       -      +
    565B  MET*     3.1    30.5    +      -       +      +
    747B  ILE*     2.8    27.6    -      -       -      +
    748B  GLU*     4.3    26.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 562 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    546B  ALA*     3.3    39.3    -      -       +      +
    547B  GLY      4.7     1.3    -      -       -      +
    548B  TYR*     3.4    30.2    -      -       +      -
    558B  ARG*     2.8    26.0    +      -       -      +
    559B  ILE      3.8     2.7    -      -       -      -
    561B  THR*     1.3    77.0    -      -       -      +
    563B  LEU*     1.3    58.2    +      -       -      +
    565B  MET*     3.6     6.9    +      -       +      +
    566B  LEU*     3.0    26.0    +      -       -      +
    627B  LEU*     4.4     3.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 563 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      2B  866      3.1    52.8    +      -       +      +
    546B  ALA*     5.6     0.2    -      -       +      -
    559B  ILE*     2.8    37.2    +      -       +      +
    560B  MET*     3.8     4.0    -      -       -      +
    561B  THR      3.2     0.2    -      -       -      -
    562B  THR*     1.3    75.0    -      -       -      +
    564B  ASN*     1.3    56.8    +      -       -      +
    566B  LEU*     4.3     8.1    -      -       +      -
    567B  GLY*     2.8    29.6    +      -       -      -
    623B  PHE*     3.6    51.1    -      -       +      -
    627B  LEU*     3.5    23.8    -      -       +      -
    629B  ILE*     4.8     0.2    -      -       +      -
    639B  MET*     4.3     2.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 564 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      2B  866      2.4    47.8    +      -       -      +
    560B  MET      2.9    18.0    +      -       -      +
    561B  THR      3.3     4.9    +      -       -      +
    563B  LEU*     1.3    74.1    -      -       -      +
    565B  MET*     1.3    60.3    +      -       -      +
    567B  GLY*     3.7     0.3    -      -       -      -
    568B  GLY      2.9    24.1    +      -       -      -
    747B  ILE*     3.6    13.5    -      -       -      +
    748B  GLU      3.0    28.7    +      -       -      +
    749B  PHE*     3.3    31.6    -      -       +      -
    750B  PRO*     3.1    19.1    -      -       +      +
    753B  LEU*     4.2     1.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with MET 565 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    546B  ALA      6.1     0.7    -      -       -      +
    561B  THR*     3.1    19.8    +      -       +      +
    562B  THR*     3.9     8.1    -      -       +      +
    564B  ASN*     1.3    74.8    -      -       -      +
    566B  LEU*     1.3    64.7    +      -       -      +
    568B  GLY*     3.3     2.8    +      -       -      -
    569B  ARG*     3.3    29.7    +      -       -      +
    748B  GLU*     3.4    43.3    -      -       +      +
    749B  PHE      3.8     1.6    -      -       -      +
    750B  PRO*     3.6    35.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 566 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      2B  866      4.0     8.1    -      -       +      +
    544B  LEU*     3.8    23.8    -      -       +      -
    545B  TYR      3.6    22.0    -      -       -      +
    546B  ALA*     4.1    12.8    -      -       +      -
    562B  THR      3.0    17.9    +      -       -      +
    563B  LEU*     3.8     8.3    -      -       +      +
    565B  MET*     1.3    75.7    -      -       -      +
    567B  GLY*     1.3    58.7    +      -       -      +
    569B  ARG*     3.1    15.2    +      -       -      +
    570B  GLN*     2.9    43.1    +      -       -      +
    623B  PHE*     3.6    31.0    -      -       +      +
    624B  ALA*     3.9    15.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 567 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      2B  866      3.8    19.7    -      -       -      -
    563B  LEU      2.8    19.4    +      -       -      -
    564B  ASN      3.7     0.9    -      -       -      -
    566B  LEU*     1.3    75.6    -      -       -      +
    568B  GLY*     1.3    65.6    +      -       -      +
    570B  GLN*     2.9    11.5    +      -       -      +
    571B  VAL*     2.8    28.9    +      -       -      +
    604B  MET*     4.5     2.5    -      -       -      -
    753B  LEU*     3.4     6.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 568 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    564B  ASN      2.9    15.1    +      -       -      -
    565B  MET      3.3     3.1    +      -       -      -
    567B  GLY*     1.3    75.3    -      -       -      +
    569B  ARG*     1.3    62.1    +      -       -      +
    571B  VAL*     3.3     2.8    +      -       -      +
    572B  ILE*     3.1    32.8    +      -       -      +
    750B  PRO*     4.1    11.2    -      -       -      -
    752B  MET*     4.5     4.0    -      -       -      +
    753B  LEU*     2.8    23.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 569 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    544B  LEU*     3.6    43.1    -      -       +      +
    545B  TYR*     2.8    28.0    +      -       -      +
    546B  ALA*     4.8     4.4    +      -       -      +
    565B  MET*     3.3    17.9    +      -       -      +
    566B  LEU*     3.1    15.8    +      -       -      +
    567B  GLY      3.1     0.4    -      -       -      -
    568B  GLY*     1.3    80.1    -      -       -      +
    570B  GLN*     1.3    59.7    +      -       -      +
    572B  ILE*     3.7    13.4    +      -       +      +
    573B  ALA*     3.2    21.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 570 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      2B  866      3.2    59.0    +      -       +      +
    541B  PRO*     6.1     1.6    -      -       -      +
    542B  GLU      5.0     3.6    -      -       -      +
    544B  LEU*     4.0    19.0    +      -       -      +
    566B  LEU*     2.9    46.0    +      -       -      +
    567B  GLY*     2.9     4.7    +      -       -      +
    569B  ARG*     1.3    75.6    -      -       -      +
    571B  VAL*     1.3    58.8    +      -       -      +
    573B  ALA*     3.2     8.2    +      -       -      +
    574B  ALA*     2.8    27.0    +      -       -      +
    604B  MET*     3.1    23.8    -      -       +      -
    611B  ARG*     4.8     4.5    +      -       -      +
    623B  PHE      4.0     1.8    +      -       -      -
    778B  GOL      3.8     5.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 571 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    567B  GLY      2.8    16.1    +      -       -      +
    568B  GLY      3.7     6.7    -      -       -      +
    570B  GLN*     1.3    74.7    -      -       -      +
    572B  ILE*     1.3    65.5    +      -       -      +
    574B  ALA*     2.9    20.0    +      -       +      +
    575B  VAL*     3.1    15.3    +      -       +      +
    596B  LEU*     6.4     1.6    -      -       +      -
    600B  TRP*     3.8    39.9    -      -       +      -
    604B  MET*     4.3     8.3    -      -       +      -
    752B  MET*     3.7    24.5    -      -       +      -
    753B  LEU*     4.0    14.4    -      -       +      -
    756B  ILE*     3.8    18.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 572 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    568B  GLY      3.1    25.4    +      -       -      +
    569B  ARG*     3.9    11.7    -      -       +      +
    571B  VAL*     1.3    74.6    -      -       -      +
    573B  ALA*     1.3    63.2    +      -       -      +
    575B  VAL*     3.1    15.3    +      -       -      +
    576B  LYS*     3.3    11.3    +      -       -      +
    752B  MET*     3.9    21.5    -      -       +      -
    748D  LEU*     3.9    36.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 573 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    541B  PRO*     4.5    20.5    -      -       +      +
    544B  LEU*     5.1     8.5    -      -       +      -
    569B  ARG      3.2    11.6    +      -       -      +
    570B  GLN*     3.2    13.0    +      -       -      +
    571B  VAL      3.1     0.6    -      -       -      -
    572B  ILE*     1.3    78.3    -      -       -      +
    574B  ALA*     1.3    61.2    +      -       -      +
    576B  LYS*     3.4    13.2    +      -       +      +
    577B  TRP*     3.0    26.0    +      -       -      +
    778B  GOL      5.8     0.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 574 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    570B  GLN      2.8    13.8    +      -       -      +
    571B  VAL*     2.9    16.8    +      -       +      +
    573B  ALA*     1.3    77.3    -      -       -      +
    575B  VAL*     1.3    56.8    +      -       -      +
    577B  TRP*     3.2    10.9    +      -       -      +
    578B  ALA*     2.8    30.7    +      -       -      +
    596B  LEU*     4.1     5.9    -      -       +      +
    600B  TRP*     6.0     3.4    -      -       +      +
    603B  LEU*     4.2    17.7    -      -       +      -
    604B  MET*     5.2     1.1    -      -       +      -
    778B  GOL      3.9    24.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 575 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    571B  VAL*     3.1    17.4    +      -       +      +
    572B  ILE      3.1     8.0    +      -       -      +
    574B  ALA*     1.3    74.7    -      -       -      +
    576B  LYS*     1.3    65.1    +      -       -      +
    578B  ALA*     3.4     1.0    +      -       -      +
    579B  LYS*     3.1    32.2    +      -       +      +
    596B  LEU*     4.2    17.0    -      -       +      -
    752B  MET*     4.0    12.6    -      -       +      -
    745D  LEU*     3.8    22.2    -      -       +      -
    748D  LEU*     3.8    31.4    -      -       +      +
    749D  LEU*     3.8    25.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 576 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    542A  GLU*     5.8     2.0    +      -       -      -
    572B  ILE*     3.3     8.4    +      -       +      +
    573B  ALA*     3.6    13.7    -      -       +      +
    575B  VAL*     1.3    80.1    -      -       -      +
    577B  TRP*     1.3    63.7    +      -       -      +
    579B  LYS*     3.8    11.2    +      -       -      +
    580B  ALA*     3.5    19.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with TRP 577 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    536B  LEU*     4.8     3.8    +      -       -      +
    539B  ILE*     3.3    50.9    -      -       +      +
    540B  GLU*     4.2     3.4    +      -       -      -
    541B  PRO*     4.0    16.4    -      -       +      -
    573B  ALA      3.0    14.1    +      -       -      +
    574B  ALA*     3.4    14.1    -      -       -      +
    575B  VAL      3.1     0.2    -      -       -      -
    576B  LYS*     1.3    75.6    -      -       -      +
    578B  ALA*     1.3    78.1    +      -       +      +
    580B  ALA*     3.0    16.0    +      -       -      +
    581B  ILE*     3.3    30.5    +      -       +      +
    603B  LEU*     3.8    20.2    -      -       +      -
    664B  LEU      5.3     0.7    -      -       -      -
    667B  LYS*     3.9    28.3    -      -       +      +
    668B  THR*     3.5    35.9    +      -       -      -
    671B  LEU*     3.9    10.3    -      -       +      -
    778B  GOL      3.1    30.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 578 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    574B  ALA      2.8    19.3    +      -       -      +
    575B  VAL      3.9     3.8    -      -       -      +
    577B  TRP*     1.3    75.2    -      -       +      +
    579B  LYS*     1.3    58.6    +      -       -      +
    581B  ILE*     2.9    31.0    +      -       -      +
    584B  PHE*     3.2    39.0    -      -       +      +
    596B  LEU*     3.9    19.5    -      -       +      -
    671B  LEU*     4.0    12.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 579 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    575B  VAL*     3.1    19.7    +      -       +      +
    576B  LYS*     4.2     9.9    -      -       -      +
    578B  ALA*     1.3    76.0    -      -       -      +
    580B  ALA*     1.3    58.3    +      -       -      +
    581B  ILE      3.6     3.0    +      -       -      +
    584B  PHE*     4.1     7.0    -      -       -      -
    585B  ARG*     2.9    63.8    +      -       +      +
    592B  GLN*     4.6     4.5    -      -       -      +
    748D  LEU      2.7    24.7    +      -       -      +
    749D  LEU*     3.1    50.6    +      -       +      +
    751D  LYS*     3.6    22.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 580 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    538A  VAL*     4.7    10.7    -      -       +      +
    535B  LEU*     3.8    12.3    -      -       -      +
    539B  ILE*     3.9    25.3    -      -       +      +
    576B  LYS      3.5    11.3    +      -       -      +
    577B  TRP      3.0    10.9    +      -       -      +
    579B  LYS*     1.3    77.0    -      -       -      +
    581B  ILE*     1.3    64.1    +      -       -      +
    582B  PRO*     3.3     9.0    -      -       -      +
    585B  ARG*     4.5     4.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 581 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    536B  LEU*     4.4     5.2    -      -       +      -
    539B  ILE*     3.9    14.6    -      -       +      -
    577B  TRP*     3.3    39.2    +      -       +      +
    578B  ALA*     2.9    13.5    +      -       -      +
    579B  LYS      4.4     1.6    -      -       -      +
    580B  ALA*     1.3    75.9    -      -       -      +
    582B  PRO*     1.3    76.2    -      -       +      +
    583B  GLY      3.1     0.5    +      -       -      -
    584B  PHE*     2.9    27.2    +      -       +      +
    585B  ARG      4.4     1.6    +      -       -      -
    668B  THR*     3.9    11.0    -      -       +      +
    671B  LEU*     3.5    30.3    -      -       +      -
    672B  LEU*     6.4     0.2    -      -       +      -
    689B  ILE*     5.8     2.2    -      -       +      -
    693B  TYR*     3.4    27.8    -      -       +      +
----------------------------------------------------------
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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