Contacts of the helix formed by residues 769 - 791 (chain D) in PDB entry 3IYD


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 VAL 769 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    555C  TYR*     3.9    14.2    -      -       +      +
    618C  GLN*     4.3     9.2    -      -       -      +
    619C  ALA*     6.2     0.9    -      -       +      -
    620C  ASN*     3.3    28.3    -      -       -      +
    657C  THR*     3.1    29.8    -      -       -      +
    660C  VAL*     3.7    30.3    -      -       +      +
   1187C  PHE*     3.5    29.4    -      -       +      -
    768D  ASN*     1.3    82.4    +      -       -      +
    770D  LEU*     1.3    62.0    +      -       -      +
    772D  TYR*     3.5     3.6    +      -       -      +
    773D  PHE*     3.3    19.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 770 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    555C  TYR*     5.2     4.7    -      -       +      -
    618C  GLN*     3.5    36.1    -      -       +      +
    635C  THR*     4.5    20.6    -      -       +      +
    637C  ARG*     3.3    28.0    -      -       -      +
    768D  ASN*     3.3    11.3    -      -       -      +
    769D  VAL*     1.3    78.5    -      -       -      +
    771D  GLN*     1.3    67.4    +      -       +      +
    772D  TYR      3.1     2.0    -      -       -      -
    773D  PHE*     3.1    19.0    +      -       +      +
    774D  ILE*     3.2    34.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 771 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    757D  THR*     6.0     0.2    +      -       -      -
    758D  PRO      5.2     4.9    +      -       -      +
    759D  ILE*     3.6    39.4    -      -       +      +
    760D  THR      5.9     0.2    -      -       -      +
    761D  ALA*     3.2    31.6    -      -       -      +
    767D  LEU*     4.6     6.6    -      -       +      +
    768D  ASN*     3.3    34.3    +      -       +      +
    770D  LEU*     1.3    79.4    -      -       +      +
    772D  TYR*     1.3    59.4    +      -       -      +
    773D  PHE      3.3     0.2    -      -       -      -
    774D  ILE*     3.9     3.7    +      -       -      +
    775D  SER*     3.7    16.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 772 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    561C  ILE*     3.7    31.2    -      -       +      +
    660C  VAL*     5.6     3.1    -      -       +      -
    671C  LEU*     3.9    25.7    -      -       +      +
    672C  GLU*     5.5     1.6    -      -       -      -
    674C  ASP      3.3    22.4    -      -       -      -
    675C  ASP*     3.9     1.6    -      -       -      -
    676C  ALA*     3.3    35.0    +      -       +      +
    679C  ALA*     3.6    16.6    -      -       -      +
   1187C  PHE*     3.9    22.9    -      +       +      -
    763D  PHE*     6.3     0.7    -      +       -      -
    767D  LEU*     4.7    20.0    -      -       +      -
    768D  ASN      2.9    17.5    +      -       -      +
    769D  VAL      3.8     4.7    -      -       -      +
    770D  LEU      3.1     0.2    -      -       -      -
    771D  GLN*     1.3    75.5    -      -       -      +
    773D  PHE*     1.3    63.6    +      -       -      +
    774D  ILE      3.2     1.2    +      -       -      -
    775D  SER*     3.5    13.5    +      -       -      -
    776D  THR*     3.3    15.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 773 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    550C  VAL*     4.7     0.7    -      -       +      -
    551C  HIS      4.0     5.2    -      -       -      -
    552C  PRO*     3.7    38.8    -      -       +      -
    555C  TYR*     3.5    44.9    -      +       +      -
    560C  PRO*     3.5    31.0    -      -       +      -
    561C  ILE*     6.3     0.4    -      -       -      -
    637C  ARG*     5.5     4.3    -      -       -      -
    660C  VAL*     4.1     9.4    -      -       +      -
    749D  LYS*     6.2     0.7    -      -       -      -
    769D  VAL      3.3    11.9    +      -       -      +
    770D  LEU*     3.1    18.8    +      -       +      +
    772D  TYR*     1.3    80.4    -      -       -      +
    774D  ILE*     1.3    67.6    +      -       +      +
    775D  SER      3.4     0.2    -      -       -      -
    776D  THR*     2.7    23.3    +      -       -      -
    777D  HIS*     2.9    32.3    +      +       -      -
----------------------------------------------------------
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Residues in contact with ILE 774 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    747D  MET*     3.6    27.4    -      -       +      +
    748D  ALA      5.5     0.9    -      -       -      +
    749D  LYS*     4.3    11.7    -      -       +      +
    755D  ILE*     3.7    44.6    -      -       +      -
    757D  THR*     6.4     1.1    -      -       +      -
    759D  ILE*     5.0     9.0    -      -       +      -
    770D  LEU*     3.2    31.1    +      -       +      +
    771D  GLN*     4.3     7.0    -      -       -      +
    772D  TYR      3.2     0.4    -      -       -      -
    773D  PHE*     1.3    89.7    -      -       +      +
    775D  SER*     1.3    56.1    +      -       -      +
    776D  THR      3.0     5.4    -      -       -      -
    777D  HIS*     2.9    31.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 775 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    675C  ASP*     4.2     6.1    +      -       -      -
    676C  ALA*     4.4     5.3    +      -       -      +
    744D  ARG*     3.3    29.5    +      -       -      -
    747D  MET*     3.6    21.6    -      -       -      +
    759D  ILE*     4.4     8.0    -      -       -      +
    767D  LEU*     4.9     7.1    -      -       -      +
    771D  GLN      3.7    12.3    +      -       -      -
    772D  TYR*     3.5    18.9    +      -       -      -
    773D  PHE      3.4     0.6    -      -       -      -
    774D  ILE*     1.3    77.9    -      -       -      +
    776D  THR*     1.3    59.7    +      -       -      +
    777D  HIS      3.3     0.4    +      -       -      -
    779D  ALA*     3.5    16.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 776 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    550C  VAL*     4.8     2.9    -      -       -      +
    560C  PRO*     3.6    34.9    -      -       -      +
    561C  ILE*     4.0    19.7    -      -       +      -
    676C  ALA*     3.7    22.9    -      -       +      -
    772D  TYR*     3.3    18.2    -      -       +      +
    773D  PHE*     2.7    22.4    +      -       -      -
    775D  SER*     1.3    76.6    -      -       -      +
    777D  HIS*     1.3    64.8    +      -       -      +
    779D  ALA*     3.8     9.6    +      -       -      +
    780D  ARG*     3.4    26.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 777 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    549C  ASP*     5.6     1.5    -      -       -      +
    550C  VAL*     3.0    48.3    +      -       +      +
    552C  PRO*     4.1    14.4    -      -       +      -
    748D  ALA      3.3    17.7    -      -       -      +
    749D  LYS*     4.8    10.6    +      -       +      -
    750D  PRO*     3.6    14.3    -      -       +      +
    773D  PHE*     2.9    50.8    +      +       -      -
    774D  ILE*     2.9    24.1    +      -       +      +
    776D  THR*     1.3    77.9    +      -       -      +
    778D  GLY*     1.3    60.3    +      -       -      +
    779D  ALA      3.1     6.1    +      -       -      -
    780D  ARG*     3.3    13.3    +      -       -      +
    781D  LYS*     3.3    19.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 778 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    747D  MET*     4.1    18.3    -      -       -      +
    748D  ALA*     3.6    18.7    +      -       -      -
    774D  ILE      3.8     5.5    +      -       -      -
    775D  SER      4.1     1.2    +      -       -      -
    777D  HIS*     1.3    77.0    -      -       -      +
    779D  ALA*     1.3    57.7    +      -       -      +
    780D  ARG      3.2     4.6    +      -       -      -
    781D  LYS*     3.7    23.6    +      -       -      +
    782D  GLY      4.5     1.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 779 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    675C  ASP*     5.9     0.2    -      -       -      +
    676C  ALA*     4.6     6.1    -      -       +      -
    677C  ASN*     3.4    30.3    +      -       -      +
    744D  ARG*     5.6     4.5    -      -       -      +
    775D  SER      3.5    18.6    +      -       -      +
    776D  THR*     4.0     9.9    -      -       -      +
    777D  HIS      3.1     1.2    -      -       -      -
    778D  GLY*     1.3    77.2    -      -       -      +
    780D  ARG*     1.3    66.2    +      -       -      +
    781D  LYS      3.4     0.9    -      -       -      -
    782D  GLY*     4.1     4.7    +      -       -      +
    783D  LEU*     4.1    17.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 780 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    545C  PHE*     5.9     0.7    -      -       -      -
    548C  ARG      4.4     4.0    +      -       -      -
    549C  ASP*     3.8    29.9    -      -       +      +
    550C  VAL*     3.5    26.5    -      -       +      +
    560C  PRO      2.9    26.9    +      -       -      -
    561C  ILE      4.7     0.2    +      -       -      -
    563C  THR*     3.2    35.5    +      -       -      +
    569C  ILE*     3.7    31.3    -      -       +      +
    570C  GLY*     4.2    13.9    -      -       -      -
    776D  THR*     3.4    19.3    +      -       -      +
    777D  HIS*     3.6    10.8    -      -       -      +
    778D  GLY      3.2     1.2    -      -       -      -
    779D  ALA*     1.3    83.4    -      -       -      +
    781D  LYS*     1.3    62.1    +      -       +      +
    782D  GLY      3.3     3.0    +      -       -      -
    783D  LEU*     3.9    11.6    -      -       -      +
    784D  ALA*     3.5    17.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 781 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    545C  PHE*     3.3    32.3    -      -       +      -
    549C  ASP*     3.1    27.5    +      -       -      -
    748D  ALA*     3.8    18.2    -      -       +      -
    749D  LYS      3.7    22.9    +      -       -      -
    750D  PRO*     3.8     1.5    -      -       -      +
    777D  HIS      3.3    24.7    -      -       -      +
    778D  GLY*     3.7    15.5    +      -       -      +
    779D  ALA      3.4     0.4    -      -       -      -
    780D  ARG*     1.3    79.3    +      -       -      +
    782D  GLY*     1.3    64.6    +      -       -      +
    784D  ALA*     3.9     7.0    +      -       -      -
    785D  ASP*     3.5    29.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 782 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    778D  GLY      4.5     2.0    +      -       -      -
    779D  ALA      4.1     6.8    +      -       -      -
    780D  ARG      3.3     1.6    -      -       -      -
    781D  LYS*     1.3    79.6    -      -       -      +
    783D  LEU*     1.3    62.2    +      -       -      +
    784D  ALA      3.1     5.6    +      -       -      -
    785D  ASP*     3.8     6.4    +      -       -      +
    786D  THR*     4.0    11.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 783 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    565C  GLU*     4.8    26.2    -      -       +      +
    566C  GLY*     5.0    10.7    -      -       -      +
    567C  PRO*     6.1     0.5    -      -       -      +
    569C  ILE*     4.1    36.5    -      -       +      +
    677C  ASN*     6.1     2.0    -      -       -      +
    779D  ALA      4.1    14.8    -      -       -      +
    780D  ARG*     3.9    18.8    -      -       -      +
    782D  GLY*     1.3    73.2    -      -       -      +
    784D  ALA*     1.3    56.0    +      -       +      +
    785D  ASP      3.9     0.2    -      -       -      -
    786D  THR*     4.4    13.2    -      -       +      -
    787D  ALA*     4.8     8.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 784 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    545C  PHE*     5.0    12.6    -      -       +      -
    548C  ARG*     5.9     4.9    -      -       -      +
    549C  ASP*     6.1     0.2    -      -       -      +
    569C  ILE*     5.9     3.6    -      -       +      -
    780D  ARG      3.5    20.2    -      -       -      +
    781D  LYS*     4.3     4.5    -      -       -      +
    782D  GLY      3.1     1.0    +      -       -      -
    783D  LEU*     1.3    80.3    -      -       +      +
    785D  ASP*     1.3    73.7    +      -       -      +
    786D  THR      3.5     2.0    -      -       -      +
    787D  ALA*     4.4    13.1    +      -       -      +
    935D  PHE*     4.9     6.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 785 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    545C  PHE*     4.8     7.6    -      -       -      -
    781D  LYS*     3.5    24.3    -      -       -      +
    782D  GLY      3.8     3.6    +      -       -      +
    784D  ALA*     1.3    87.0    -      -       -      +
    786D  THR*     1.3    58.9    +      -       -      +
    787D  ALA      3.5     1.6    -      -       -      -
    788D  LEU*     4.9     5.5    +      -       -      +
    789D  LYS*     4.4    11.4    +      -       -      +
    931D  THR      5.7     1.0    -      -       -      +
    935D  PHE*     4.0    27.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 786 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    782D  GLY      4.0    15.9    -      -       -      +
    783D  LEU*     4.4    11.0    -      -       +      -
    785D  ASP*     1.3    78.8    -      -       -      +
    787D  ALA*     1.3    57.3    +      -       -      +
    788D  LEU      3.1     7.8    +      -       -      +
    789D  LYS*     4.1    22.2    +      -       -      +
    790D  THR*     3.0    36.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 787 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    567C  PRO*     6.4     1.6    -      -       +      -
    783D  LEU      4.8     9.0    -      -       -      +
    784D  ALA*     4.4    14.5    +      -       -      +
    785D  ASP      3.5     2.0    -      -       -      +
    786D  THR*     1.3    77.9    -      -       -      +
    788D  LEU*     1.3    57.8    +      -       -      +
    790D  THR*     4.0     8.9    +      -       -      -
    791D  ALA*     4.4     8.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 788 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    785D  ASP      5.3     4.7    -      -       -      +
    786D  THR      3.1     1.0    -      -       -      -
    787D  ALA*     1.3    80.4    -      -       -      +
    789D  LYS*     1.3    72.4    +      -       +      +
    790D  THR      3.3     1.1    -      -       -      -
    791D  ALA*     3.3    20.6    +      -       +      +
    792D  ASN      4.0     5.2    +      -       -      -
    793D  SER*     5.2     0.3    +      -       -      -
    931D  THR*     5.0    19.1    -      -       +      +
   1138D  LEU*     6.1     5.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 789 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    785D  ASP      4.4     7.2    +      -       -      +
    786D  THR*     3.9    28.4    +      -       -      +
    788D  LEU*     1.3    82.4    -      -       +      +
    790D  THR*     1.3    62.0    +      -       +      +
    791D  ALA      3.2     0.6    +      -       -      -
    793D  SER*     4.1    20.7    +      -       -      -
    927D  GLY      5.0     4.7    -      -       -      +
    928D  THR*     4.0    45.6    +      -       +      +
    929D  GLN*     5.2     4.0    -      -       -      +
    930D  LEU      3.7    11.7    +      -       -      +
    931D  THR*     3.3    30.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 790 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    427D  PRO*     5.8     3.1    -      -       -      +
    786D  THR*     3.0    34.8    +      -       +      +
    787D  ALA*     4.0     8.3    -      -       -      -
    789D  LYS*     1.3    75.9    -      -       +      +
    791D  ALA*     1.3    68.2    +      -       -      +
    928D  THR*     5.7     2.0    -      -       +      -
     19J    T      4.7     9.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 791 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    787D  ALA      4.4     9.4    +      -       -      +
    788D  LEU*     3.3    16.0    +      -       -      +
    789D  LYS      3.2     0.6    -      -       -      -
    790D  THR*     1.3    86.2    +      -       -      +
    792D  ASN*     1.3    67.6    +      -       +      +
     19J    T      3.5    36.2    +      -       +      -
----------------------------------------------------------
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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