Contacts of the helix formed by residues 564 - 592 (chain B) in PDB entry 3H3T


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 PRO 564 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    473B  TRP*     5.2     2.7    -      -       +      +
    562B  TRP*     3.4    28.9    -      -       +      -
    563B  ALA*     1.3    87.2    -      -       +      +
    565B  ALA*     1.3    65.2    +      -       -      +
    566B  SER*     4.6     5.8    -      -       -      +
    567B  VAL*     3.1    31.8    +      -       +      +
    568B  LEU*     3.0    21.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 565 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    409B  GLU*     5.1     3.4    -      -       -      +
    414B  VAL*     3.6    17.9    -      -       +      +
    563B  ALA      3.3     4.1    +      -       -      -
    564B  PRO*     1.3    72.2    -      -       -      +
    566B  SER*     1.3    63.7    -      -       -      +
    568B  LEU*     3.2     6.7    +      -       -      +
    569B  ARG*     3.0    51.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 566 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    564B  PRO*     3.3     5.9    -      -       -      +
    565B  ALA*     1.3    78.1    -      -       -      +
    567B  VAL*     1.3    68.1    +      -       -      +
    569B  ARG*     3.4     9.1    +      -       -      +
    570B  ALA*     3.1    24.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 567 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    473B  TRP*     3.6    44.6    -      -       +      +
    474B  PRO*     5.2     3.6    -      -       +      -
    564B  PRO*     3.1    31.4    +      -       +      +
    566B  SER*     1.3    83.1    +      -       -      +
    568B  LEU*     1.3    67.3    +      -       +      +
    570B  ALA*     3.1    11.1    +      -       -      +
    571B  VAL*     3.0    22.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 568 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    414B  VAL*     4.7    24.9    -      -       +      +
    473B  TRP*     3.3    44.0    -      -       +      -
    559B  PRO*     4.0    28.5    -      -       +      -
    563B  ALA*     3.5    36.1    -      -       +      +
    564B  PRO      3.0    11.0    +      -       -      +
    565B  ALA*     3.2     6.9    +      -       -      +
    567B  VAL*     1.3    76.3    -      -       -      +
    569B  ARG*     1.3    61.6    +      -       -      +
    571B  VAL*     3.3     9.6    -      -       +      +
    572B  ALA*     3.1    23.6    +      -       -      +
    600B  16H      4.8     5.8    -      -       +      +
----------------------------------------------------------
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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
----------------------------------------------------------
    405B  ARG*     3.1    42.4    +      -       -      +
    407B  GLU*     3.5    34.6    +      -       -      +
    408B  VAL      4.0     4.8    +      -       -      +
    409B  GLU*     3.6    19.8    +      -       -      -
    414B  VAL*     3.5    28.3    -      -       +      +
    416B  ASP*     2.6    43.6    +      -       -      +
    565B  ALA*     3.0    30.2    +      -       -      +
    566B  SER*     3.8     7.9    -      -       -      +
    567B  VAL      3.1     0.2    -      -       -      -
    568B  LEU*     1.3    78.9    -      -       -      +
    570B  ALA*     1.3    61.6    +      -       -      +
    572B  ALA*     3.7     2.2    +      -       -      -
    573B  LYS*     3.2    14.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 570 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    566B  SER      3.1    16.7    +      -       -      +
    567B  VAL*     3.1     6.7    +      -       -      +
    569B  ARG*     1.3    79.1    -      -       -      +
    571B  VAL*     1.3    58.5    +      -       +      +
    573B  LYS*     3.5     9.3    +      -       -      +
    574B  ARG*     3.0    30.2    +      -       -      +
----------------------------------------------------------
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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
----------------------------------------------------------
    472B  VAL*     3.7    26.5    -      -       +      +
    473B  TRP*     4.0    27.1    -      -       +      -
    567B  VAL*     3.0    16.9    +      -       +      +
    568B  LEU*     3.3    15.3    -      -       -      +
    570B  ALA*     1.3    78.0    -      -       +      +
    572B  ALA*     1.3    60.0    +      -       -      +
    574B  ARG*     4.2    19.1    -      -       -      +
    575B  GLU*     2.7    42.4    +      -       +      +
    600B  16H      3.8    24.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 572 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    405B  ARG*     4.1    11.0    -      -       -      +
    416B  ASP*     6.6     0.4    -      -       +      -
    418B  LEU*     4.7     9.1    -      -       +      +
    568B  LEU      3.1    17.0    +      -       -      +
    569B  ARG*     3.7     7.0    -      -       -      +
    571B  VAL*     1.3    80.8    -      -       -      +
    573B  LYS*     1.3    62.6    +      -       -      +
    576B  TYR*     3.1    49.1    +      -       +      -
    577B  PRO*     3.6     1.9    -      -       -      +
    600B  16H      4.1     7.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 573 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    395B  VAL*     3.9    44.2    +      -       +      +
    396B  VAL*     3.7    13.0    -      -       +      +
    403B  VAL*     6.1     1.3    -      -       -      -
    405B  ARG*     3.4    26.2    -      -       -      +
    569B  ARG      3.2    14.5    +      -       -      +
    570B  ALA*     3.7     8.1    -      -       -      +
    571B  VAL      3.3     0.2    -      -       -      -
    572B  ALA*     1.3    78.4    -      -       -      +
    574B  ARG*     1.3    57.4    +      -       -      +
    577B  PRO*     3.1    24.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 574 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    472B  VAL*     2.8    33.5    +      -       -      +
    570B  ALA*     3.0    21.3    +      -       -      +
    571B  VAL*     3.8    18.6    -      -       -      +
    572B  ALA      3.2     0.2    -      -       -      -
    573B  LYS*     1.3    79.8    -      -       -      +
    575B  GLU*     1.3    93.9    +      -       -      +
    576B  TYR      3.7     0.2    -      -       -      -
    577B  PRO*     4.2     1.0    -      -       -      +
    578B  LYS*     3.3    30.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 575 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    447B  THR*     4.7     1.7    +      -       -      -
    448B  THR*     3.4    21.1    -      -       +      +
    472B  VAL*     4.2    17.9    -      -       +      +
    571B  VAL*     2.7    24.7    +      -       +      +
    574B  ARG*     1.3   115.8    +      -       -      +
    576B  TYR*     1.3    64.0    +      -       -      +
    578B  LYS*     3.9    22.7    +      -       -      +
    579B  PHE*     3.1    24.4    +      -       -      +
    600B  16H      3.8    29.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 576 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    403B  VAL*     5.0     2.9    -      -       +      -
    418B  LEU*     3.4    37.9    -      -       +      -
    553B  TYR*     3.6    36.3    -      +       +      -
    555B  ALA*     3.7    15.7    -      -       +      +
    557B  VAL*     3.4    28.4    -      -       -      +
    572B  ALA*     3.1    27.3    +      -       +      +
    575B  GLU*     1.3    72.7    -      -       -      +
    577B  PRO*     1.3    77.6    -      -       +      +
    579B  PHE*     3.4     8.7    +      +       -      -
    580B  LEU*     3.1    27.1    +      -       +      +
    600B  16H      3.5    52.5    -      +       +      +
----------------------------------------------------------
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Residues in contact with PRO 577 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    396B  VAL*     3.8    33.2    -      -       +      -
    398B  GLU*     6.1     1.3    -      -       +      -
    401B  MET*     4.0    24.4    -      -       +      +
    403B  VAL*     4.2    11.0    -      -       +      -
    572B  ALA      3.6     3.4    -      -       -      +
    573B  LYS*     3.1    28.7    -      -       -      +
    574B  ARG      3.7     2.0    -      -       -      +
    575B  GLU      3.7     1.1    -      -       -      -
    576B  TYR*     1.3    95.7    -      -       +      +
    578B  LYS*     1.3    62.9    +      -       -      +
    580B  LEU*     3.0     2.9    +      -       -      +
    581B  LYS*     3.0    25.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 578 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    447B  THR*     4.3    26.4    +      -       +      +
    574B  ARG*     3.3    22.3    +      -       +      +
    575B  GLU*     3.9    26.7    +      -       -      +
    576B  TYR      3.3     0.4    -      -       -      -
    577B  PRO*     1.3    79.9    -      -       -      +
    579B  PHE*     1.3    62.5    +      -       -      +
    581B  LYS*     3.7     4.7    +      -       -      +
    582B  ARG*     3.3    28.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 579 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    436B  PHE*     3.8    10.3    -      +       -      -
    445B  TRP*     3.3    41.8    -      +       -      +
    446B  GLU*     5.6     4.5    -      -       -      +
    447B  THR*     6.1     1.3    -      -       -      -
    527B  MET*     3.8    23.6    -      -       +      -
    553B  TYR*     3.6    28.5    -      +       -      -
    575B  GLU      3.1    16.6    +      -       -      +
    576B  TYR*     3.5    12.3    -      -       -      -
    578B  LYS*     1.3    78.0    -      -       -      +
    580B  LEU*     1.3    74.9    +      -       +      +
    582B  ARG*     3.9     4.3    -      -       -      +
    583B  PHE*     2.8    42.8    +      +       +      +
    600B  16H      3.8    27.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 580 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    401B  MET*     3.8    24.0    -      -       +      -
    403B  VAL*     4.7     2.0    -      -       +      -
    420B  ALA*     3.6    31.2    -      -       +      -
    422B  HIS*     4.8    10.5    -      -       +      -
    527B  MET*     4.6     9.2    -      -       +      -
    551B  ILE*     5.1     7.6    -      -       +      -
    553B  TYR*     4.4    19.7    -      -       +      -
    576B  TYR*     3.1    20.7    +      -       +      +
    577B  PRO      3.0     5.1    +      -       -      +
    579B  PHE*     1.3    98.3    -      -       +      +
    581B  LYS*     1.3    55.1    +      -       -      +
    583B  PHE*     4.7     1.6    -      -       +      -
    584B  THR*     2.5    52.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 581 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    398B  GLU*     2.9    40.9    +      -       -      +
    401B  MET*     4.4    12.7    -      -       +      -
    422B  HIS*     5.2     2.9    -      -       -      -
    577B  PRO      3.0    15.6    +      -       -      +
    578B  LYS*     4.0     5.6    -      -       -      +
    580B  LEU*     1.3    77.4    -      -       -      +
    582B  ARG*     1.3    57.0    +      -       -      +
    584B  THR*     3.1     5.7    +      -       -      -
    585B  SER*     3.0    37.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 582 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    443B  ASN      5.5     0.8    +      -       -      -
    444B  ASP      3.7    15.5    +      -       -      -
    445B  TRP*     3.1    34.7    +      -       +      +
    447B  THR*     3.6    27.0    -      -       -      +
    578B  LYS*     3.3    21.1    +      -       +      +
    579B  PHE*     3.9     4.3    -      -       -      +
    581B  LYS*     1.3    78.8    -      -       -      +
    583B  PHE*     1.3    60.1    +      -       -      +
    585B  SER*     3.8     4.6    -      -       -      -
    586B  TYR*     3.0    30.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 583 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    432B  VAL*     3.5    37.2    -      -       +      -
    435B  TYR*     3.9     5.2    -      -       +      -
    436B  PHE*     3.6    28.0    -      -       +      -
    445B  TRP*     3.5    39.3    -      +       +      -
    527B  MET*     3.7    25.6    -      -       +      -
    579B  PHE*     2.8    39.6    +      +       +      +
    580B  LEU*     4.3     1.6    -      -       +      +
    582B  ARG*     1.3    73.8    -      -       -      +
    584B  THR*     1.3    75.5    +      -       +      +
    586B  TYR*     3.3     6.2    -      +       -      +
    587B  VAL*     3.2    43.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 584 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    422B  HIS*     3.9    17.5    +      -       +      -
    424B  VAL*     3.8    32.1    -      -       +      +
    432B  VAL*     5.8     1.6    -      -       +      -
    551B  ILE*     3.9    15.5    -      -       +      -
    580B  LEU*     2.5    33.9    +      -       +      +
    581B  LYS*     3.1    10.7    +      -       -      -
    583B  PHE*     1.3    89.6    -      -       +      +
    585B  SER*     1.3    63.8    +      -       -      +
    587B  VAL*     3.4     6.6    +      -       -      +
    588B  GLN*     3.1    27.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 585 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    581B  LYS*     3.0    28.0    +      -       -      +
    582B  ARG*     3.8     5.8    -      -       -      -
    584B  THR*     1.3    76.4    +      -       -      +
    586B  TYR*     1.3    65.5    +      -       -      +
    588B  GLN*     3.0    18.6    +      -       -      +
    589B  GLU*     2.9    37.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 586 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    435B  TYR*     3.7    23.9    -      +       +      -
    441B  VAL*     3.7    14.4    -      -       +      +
    444B  ASP*     2.6    51.8    +      -       +      +
    445B  TRP*     4.2    27.1    -      +       +      -
    582B  ARG*     3.0    19.8    +      -       +      +
    583B  PHE*     3.3     9.6    -      -       -      +
    585B  SER*     1.3    77.0    -      -       -      +
    587B  VAL*     1.3    70.4    +      -       +      +
    589B  GLU*     3.0    26.4    +      -       -      +
    590B  LYS*     3.0    45.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 587 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    424B  VAL*     6.3     0.2    -      -       +      -
    427B  VAL*     4.0    14.4    -      -       +      -
    431B  GLU      4.4     1.3    -      -       -      +
    432B  VAL*     4.0    27.1    -      -       +      +
    435B  TYR*     3.8    33.9    -      -       +      -
    583B  PHE*     3.2    44.0    +      -       +      +
    584B  THR*     3.8     6.7    -      -       -      +
    585B  SER      3.2     0.4    -      -       -      -
    586B  TYR*     1.3    77.0    -      -       +      +
    588B  GLN*     1.3    57.7    +      -       -      +
    589B  GLU      3.3     0.2    +      -       -      -
    590B  LYS*     4.6     3.1    -      -       -      +
    591B  THR*     2.6    39.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 588 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    424B  VAL*     3.3    26.5    -      -       +      +
    425B  LYS*     2.8    35.8    +      -       -      +
    427B  VAL*     4.0     7.2    -      -       +      -
    584B  THR*     3.1    14.1    +      -       -      +
    585B  SER*     3.0    17.4    +      -       -      +
    587B  VAL*     1.3    77.9    -      -       -      +
    589B  GLU*     1.3    61.0    +      -       +      +
    591B  THR*     3.4     4.9    +      -       -      -
    592B  ALA*     3.2    25.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 589 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    585B  SER*     2.9    32.8    +      -       -      +
    586B  TYR*     3.0    17.0    +      -       +      +
    588B  GLN*     1.3    78.9    -      -       +      +
    590B  LYS*     1.3    71.7    +      -       -      +
    591B  THR      3.6     0.3    +      -       -      -
    592B  ALA*     4.0    11.9    +      -       -      +
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Residues in contact with LYS 590 (chain B). Click here for Legend to table.
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                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    435B  TYR*     3.5    25.9    +      -       +      +
    441B  VAL*     6.3     0.2    -      -       +      -
    444B  ASP*     5.0     4.2    +      -       -      +
    586B  TYR*     3.0    58.8    +      -       +      +
    587B  VAL      4.2     1.8    -      -       -      +
    589B  GLU*     1.3    88.4    +      -       -      +
    591B  THR*     1.3    54.9    +      -       -      +
    592B  ALA      5.3     0.4    -      -       -      -
    594B  LYS*     2.8    43.9    +      -       -      +
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Residues in contact with THR 591 (chain B). Click here for Legend to table.
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                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    426B  GLY      4.5     0.5    +      -       -      -
    427B  VAL*     3.3    15.6    -      -       -      +
    431B  GLU*     4.1    19.7    -      -       +      +
    435B  TYR*     3.8    30.3    -      -       +      +
    544B  ARG*     3.0    29.6    +      -       -      +
    587B  VAL*     2.6    28.8    +      -       +      +
    588B  GLN      3.4     2.6    +      -       -      -
    590B  LYS*     1.3    79.8    -      -       -      +
    592B  ALA*     1.3    67.3    +      -       -      +
    594B  LYS*     2.9    23.3    +      -       +      +
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Residues in contact with ALA 592 (chain B). Click here for Legend to table.
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                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    544B  ARG*     4.4     5.8    -      -       -      +
    588B  GLN      3.2    19.2    +      -       -      +
    589B  GLU*     4.2    10.2    -      -       -      +
    590B  LYS      3.7     0.9    -      -       -      +
    591B  THR*     1.3    75.0    +      -       -      +
    593B  GLY*     1.3    63.5    +      -       -      +
    594B  LYS*     3.1     7.4    +      -       -      +
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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