Contacts of the helix formed by residues 582 - 604 (chain A) in PDB entry 3KAS


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 GLU 582 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    491A  THR*     4.0    15.8    +      -       -      +
    516A  PRO      5.7     0.9    -      -       -      +
    517A  VAL*     4.4    16.8    -      -       +      +
    580A  ILE*     3.3    14.9    -      -       -      +
    581A  PRO*     1.3    93.9    -      -       +      +
    583A  LEU*     1.3    64.8    +      -       -      +
    584A  ASN*     3.2     3.4    -      -       -      -
    585A  LYS*     2.9    28.7    +      -       +      +
    586A  VAL*     3.0    19.0    +      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 583 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    141A  THR*     3.8    10.8    -      -       +      -
    144A  ILE*     4.1    21.5    -      -       +      -
    421A  VAL*     5.1     0.4    -      -       +      -
    488A  VAL*     3.8    26.2    -      -       +      -
    573A  TYR*     4.1    11.7    -      -       +      -
    576A  LEU*     3.8    38.4    -      -       +      -
    577A  ILE*     3.7    26.7    -      -       +      -
    580A  ILE*     3.1    22.3    +      -       +      +
    581A  PRO      3.1     2.4    +      -       -      -
    582A  GLU*     1.3    76.1    -      -       -      +
    584A  ASN*     1.3    55.4    +      -       -      +
    586A  VAL*     3.2     2.3    +      -       -      +
    587A  ALA*     2.8    38.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 584 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    136A  ASP      5.8     1.2    +      -       -      -
    138A  THR      3.6    15.5    +      -       -      -
    139A  ASP*     3.6     5.1    -      -       -      +
    140A  PHE*     2.7    40.3    +      -       -      +
    141A  THR*     3.3    26.0    +      -       +      +
    581A  PRO      5.0     0.6    +      -       -      -
    582A  GLU      3.0     1.4    +      -       -      -
    583A  LEU*     1.3    78.7    -      -       -      +
    585A  LYS*     1.3    58.9    +      -       -      +
    587A  ALA      3.6     0.2    +      -       -      -
    588A  ARG*     2.9    30.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 585 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    516A  PRO*     3.2    40.1    +      -       +      +
    517A  VAL      5.7     0.4    +      -       -      -
    582A  GLU*     2.9    18.1    +      -       +      +
    584A  ASN*     1.3    78.9    -      -       -      +
    586A  VAL*     1.3    58.1    +      -       -      +
    588A  ARG*     3.2    16.3    +      -       -      +
    589A  ALA*     3.0    22.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 586 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    488A  VAL*     3.8    24.2    -      -       +      -
    490A  GLY      4.0     4.9    -      -       -      +
    491A  THR*     4.2    18.8    -      -       -      +
    516A  PRO*     3.8    22.4    -      -       +      -
    517A  VAL*     5.1     0.7    -      -       +      -
    557A  PHE*     3.8    31.5    -      -       +      -
    580A  ILE*     4.2     6.5    -      -       +      -
    582A  GLU*     3.0    25.8    +      -       +      +
    583A  LEU*     3.8     5.2    -      -       -      +
    585A  LYS*     1.3    74.8    -      -       -      +
    587A  ALA*     1.3    65.8    +      -       -      +
    589A  ALA*     3.1     4.3    +      -       -      +
    590A  ALA*     3.0    20.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 587 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    140A  PHE*     3.8    28.0    -      -       +      -
    144A  ILE*     4.9     6.7    -      -       +      -
    421A  VAL*     5.4     2.0    -      -       +      -
    425A  LEU*     3.5    18.2    -      -       +      +
    488A  VAL*     3.9    18.7    -      -       +      +
    583A  LEU*     2.8    25.3    +      -       +      +
    584A  ASN      3.9     0.2    -      -       -      +
    586A  VAL*     1.3    73.2    -      -       -      +
    588A  ARG*     1.3    57.4    +      -       -      +
    590A  ALA*     3.2     4.0    +      -       -      +
    591A  ALA*     2.9    24.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 588 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132A  SER*     3.5    24.9    +      -       -      +
    135A  LEU*     3.8    35.8    -      -       +      +
    136A  ASP*     3.0    30.3    +      -       -      +
    138A  THR      5.9     0.2    -      -       -      +
    140A  PHE*     3.5    16.4    -      -       +      -
    584A  ASN*     2.9    21.2    +      -       -      +
    585A  LYS*     3.2    15.9    +      -       -      +
    587A  ALA*     1.3    78.3    -      -       -      +
    589A  ALA*     1.3    65.2    +      -       -      +
    591A  ALA*     3.2     4.0    +      -       -      +
    592A  GLU*     2.8    52.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 589 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    513A  VAL*     4.3     3.8    -      -       +      +
    514A  LYS      4.1    13.5    -      -       -      +
    516A  PRO*     3.5    32.1    -      -       +      -
    557A  PHE*     3.6    15.3    -      -       +      -
    585A  LYS      3.0     7.9    +      -       -      +
    586A  VAL      3.1     2.4    +      -       -      +
    588A  ARG*     1.3    80.7    -      -       -      +
    590A  ALA*     1.3    65.8    +      -       -      +
    592A  GLU*     3.2     8.4    +      -       -      +
    593A  VAL*     3.0    27.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 590 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    425A  LEU*     4.1    19.9    -      -       +      +
    484A  LEU*     5.3     0.2    -      -       -      +
    487A  ALA*     4.2     8.3    -      -       +      -
    488A  VAL*     4.2     8.3    -      -       +      -
    555A  PHE*     3.4    28.4    -      -       +      -
    557A  PHE*     3.7    14.0    -      -       +      -
    586A  VAL      3.0    11.9    +      -       -      +
    587A  ALA      3.4     9.6    -      -       -      +
    589A  ALA*     1.3    78.1    -      -       -      +
    591A  ALA*     1.3    60.4    +      -       -      +
    593A  VAL      3.6     0.2    +      -       -      -
    594A  ALA*     3.3    18.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 591 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    131A  LEU*     5.0     0.2    -      -       -      +
    135A  LEU*     3.6    25.6    -      -       +      +
    140A  PHE*     3.8    15.9    -      -       +      -
    425A  LEU*     4.2     8.3    -      -       +      +
    429A  LEU*     3.5    22.2    -      -       +      +
    432A  MET*     4.5     0.2    -      -       +      -
    587A  ALA      2.9    12.9    +      -       -      +
    588A  ARG      3.6     4.7    -      -       -      +
    589A  ALA      3.2     0.2    -      -       -      -
    590A  ALA*     1.3    75.1    -      -       -      +
    592A  GLU*     1.3    57.0    +      -       -      +
    594A  ALA*     4.6     2.7    -      -       -      -
    595A  GLY*     2.7    32.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 592 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128A  LYS*     5.4     1.0    -      -       -      +
    131A  LEU*     4.1    10.9    -      -       +      +
    132A  SER*     4.0    17.2    +      -       -      -
    135A  LEU*     3.6    22.4    -      -       +      +
    512A  ASN      4.7     5.0    -      -       -      +
    513A  VAL*     4.0    28.3    -      -       +      +
    514A  LYS      5.2     1.9    +      -       -      +
    588A  ARG*     2.8    39.4    +      -       -      +
    589A  ALA*     3.2     8.8    +      -       -      +
    591A  ALA*     1.3    75.8    -      -       -      +
    593A  VAL*     1.3    61.4    +      -       -      +
    596A  GLN*     2.8    47.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 593 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    494A  PHE*     4.4    14.1    -      -       +      -
    509A  THR*     3.9    19.5    -      -       +      -
    513A  VAL*     4.3    15.0    -      -       +      +
    522A  LEU*     4.3    14.4    -      -       +      -
    555A  PHE*     3.4    33.2    -      -       +      -
    557A  PHE*     4.9     0.4    -      -       +      -
    589A  ALA      3.0    20.3    +      -       -      +
    590A  ALA*     4.0     5.4    -      -       -      +
    592A  GLU*     1.3    76.0    -      -       -      +
    594A  ALA*     1.3    66.0    +      -       -      +
    596A  GLN*     3.2     0.7    +      -       -      +
    597A  PHE*     2.9    43.8    +      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 594 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    405A  VAL*     5.4     1.3    -      -       +      -
    429A  LEU*     3.8    24.7    -      -       +      -
    482A  ILE*     4.2     7.8    -      -       +      +
    484A  LEU*     3.8    17.3    -      -       +      -
    555A  PHE*     4.0     6.5    -      -       +      -
    590A  ALA      3.3    14.2    +      -       -      +
    591A  ALA      3.9     0.2    -      -       -      +
    593A  VAL*     1.3    82.1    -      -       -      +
    595A  GLY*     1.3    58.1    +      -       -      +
    597A  PHE*     3.2    13.9    -      -       -      +
    598A  VAL*     2.9    32.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 595 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    131A  LEU*     3.9    12.8    -      -       -      -
    429A  LEU*     4.3     3.7    -      -       -      +
    433A  PHE*     3.6    24.6    -      -       -      -
    591A  ALA      2.7    23.3    +      -       -      -
    592A  GLU      3.8     0.7    -      -       -      -
    594A  ALA*     1.3    73.8    -      -       -      +
    596A  GLN*     1.3    56.6    +      -       -      +
    598A  VAL      3.1     1.2    +      -       -      -
    599A  ILE*     2.8    33.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 596 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6A  PO4      5.5     0.2    +      -       -      -
    124A  TRP*     4.2    17.0    -      -       +      -
    128A  LYS*     3.6    24.3    -      -       +      +
    131A  LEU*     3.7    15.6    -      -       +      +
    508A  LYS      5.0     0.2    +      -       -      -
    509A  THR*     3.9    26.3    +      -       +      +
    512A  ASN*     2.7    34.7    +      -       -      +
    513A  VAL*     4.1    11.8    -      -       -      +
    592A  GLU*     2.8    34.0    +      -       +      +
    593A  VAL      3.8     2.0    -      -       -      +
    595A  GLY*     1.3    68.2    -      -       -      +
    597A  PHE*     1.3    68.3    +      -       -      +
    599A  ILE*     3.2     5.1    +      -       +      +
    600A  LYS*     2.9    29.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 597 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    482A  ILE*     3.7    17.7    -      -       +      -
    494A  PHE*     5.8     3.6    -      +       -      -
    496A  VAL*     5.8     0.9    -      -       +      -
    505A  LEU*     3.9    22.0    -      -       +      -
    506A  ILE*     3.8    34.1    -      -       +      -
    509A  THR*     3.5    34.1    -      -       +      -
    510A  MET*     6.5     0.4    -      -       +      -
    553A  VAL*     3.9    35.0    -      -       +      -
    555A  PHE*     4.2     7.0    -      +       -      -
    593A  VAL*     2.9    36.5    +      -       +      -
    594A  ALA*     3.2    15.7    -      -       -      +
    596A  GLN*     1.3    75.2    -      -       -      +
    598A  VAL*     1.3    62.7    +      -       -      +
    600A  LYS*     3.8     1.0    -      -       -      +
    601A  LEU*     3.0    31.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 598 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    403A  VAL*     4.6     5.2    -      -       +      -
    405A  VAL*     3.7    20.9    -      -       +      -
    429A  LEU*     6.2     0.9    -      -       +      -
    433A  PHE*     3.8    21.8    -      -       +      -
    442A  PHE*     5.7     0.2    -      -       +      -
    448A  ILE*     3.7    37.9    -      -       +      -
    450A  PHE*     6.1     0.2    -      -       +      -
    482A  ILE*     3.5    20.4    -      -       +      -
    594A  ALA*     2.9    19.8    +      -       +      +
    595A  GLY      3.1     6.9    +      -       -      +
    597A  PHE*     1.3    76.9    -      -       -      +
    599A  ILE*     1.3    60.8    +      -       -      +
    601A  LEU*     3.7     4.8    +      -       -      +
    602A  THR*     2.8    30.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 599 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    124A  TRP*     3.4    25.4    -      -       +      -
    127A  LEU*     3.8    52.3    -      -       +      +
    128A  LYS*     5.1     0.4    -      -       -      +
    131A  LEU*     4.1    19.7    -      -       +      -
    433A  PHE*     3.5    23.1    -      -       +      -
    436A  MET*     4.9     5.8    -      -       -      -
    442A  PHE*     4.5     9.4    -      -       +      -
    595A  GLY      2.8    20.7    +      -       -      +
    596A  GLN*     3.9     1.6    -      -       -      +
    598A  VAL*     1.3    75.0    -      -       -      +
    600A  LYS*     1.3    67.7    +      -       -      +
    602A  THR*     2.9     7.1    +      -       -      -
    603A  HIS*     2.8    27.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 600 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6A  PO4      4.1    21.7    +      -       -      -
    124A  TRP*     3.5    33.4    -      -       +      -
    505A  LEU*     3.7    27.2    -      -       +      +
    508A  LYS*     3.4    38.8    -      -       -      +
    509A  THR*     5.5     2.0    +      -       -      +
    596A  GLN*     2.9    15.4    +      -       -      +
    597A  PHE      3.8     0.2    -      -       -      +
    599A  ILE*     1.3    77.6    -      -       -      +
    601A  LEU*     1.3    63.4    +      -       -      +
    603A  HIS*     4.6     2.7    -      -       -      -
    604A  ASP*     3.2    47.2    +      -       -      +
    608A  ASN*     3.0    24.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 601 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    403A  VAL*     4.0    25.1    -      -       +      -
    446A  ARG*     2.7    31.7    +      -       -      -
    479A  PHE*     4.0    20.1    -      -       +      -
    480A  THR*     3.7    36.6    -      -       +      +
    482A  ILE*     4.7     0.9    -      -       +      -
    502A  LEU*     4.8     1.8    -      -       +      -
    505A  LEU*     3.6    26.9    -      -       +      -
    597A  PHE*     3.0    27.0    +      -       +      +
    598A  VAL      4.0     1.6    -      -       -      +
    599A  ILE      3.1     0.2    -      -       -      -
    600A  LYS*     1.3    77.0    -      -       -      +
    602A  THR*     1.3    53.7    +      -       -      +
    607A  LEU*     4.2     3.6    -      -       +      +
    608A  ASN*     3.7    28.8    -      -       +      +
    609A  LEU*     4.9     2.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 602 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    403A  VAL*     3.5    29.4    -      -       +      -
    442A  PHE*     3.6    18.4    -      -       -      -
    443A  GLN      4.5     0.5    -      -       -      +
    444A  PRO*     3.5     8.9    -      -       -      +
    445A  SER*     2.7    31.6    +      -       -      -
    446A  ARG*     3.6    40.2    -      -       +      +
    448A  ILE*     4.1    12.7    -      -       +      +
    598A  VAL      2.8    18.7    +      -       -      +
    599A  ILE      2.9     3.7    +      -       -      -
    601A  LEU*     1.3    76.3    -      -       -      +
    603A  HIS*     1.3    58.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 603 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      1A    K      3.7    10.5    -      -       -      -
      2A  PO4      2.8    28.1    +      -       -      -
    121A  ARG*     3.2    51.5    +      -       -      +
    122A  LEU      3.1    25.1    -      -       -      -
    124A  TRP*     4.0    12.6    +      +       +      -
    127A  LEU*     3.4    23.4    -      -       +      +
    442A  PHE*     4.9     4.5    -      -       +      -
    443A  GLN      5.6     1.3    +      -       -      -
    445A  SER*     4.1     4.6    +      -       -      -
    599A  ILE*     2.8    25.1    +      -       +      +
    600A  LYS*     4.1     1.6    -      -       -      +
    601A  LEU      3.5     0.2    -      -       -      -
    602A  THR*     1.3    80.6    -      -       -      +
    604A  ASP*     1.3    83.4    +      -       -      +
    605A  VAL*     3.6     1.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 604 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      2A  PO4      4.2     8.8    +      -       -      -
    121A  ARG*     4.8     1.8    -      -       -      +
    124A  TRP*     5.5     2.1    -      -       -      +
    445A  SER*     4.9     0.9    +      -       -      -
    446A  ARG*     2.8    26.3    +      -       -      -
    600A  LYS*     3.2    31.4    +      -       -      +
    603A  HIS*     1.3    91.7    -      -       -      +
    605A  VAL*     1.3    62.1    +      -       -      +
    606A  GLU*     3.2    17.2    -      -       +      +
    608A  ASN*     2.9    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