Contacts of the helix formed by residues 272 - 294 (chain C) in PDB entry 3D5K


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 ARG 272 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    268C  LEU*     2.9    29.6    +      -       +      +
    271C  ARG*     1.3    72.1    -      -       -      +
    273C  PRO*     1.4    72.6    -      -       +      +
    274C  ASP*     2.8    38.5    +      -       -      +
    275C  ILE*     3.2    12.7    +      -       +      +
    276C  LEU*     3.2    21.5    +      -       -      +
    364C  THR*     5.2     1.4    -      -       -      +
    365C  ALA*     3.5    28.3    -      -       -      +
    368C  GLU*     2.7    31.4    +      -       -      -
    444C  LYS*     5.1     5.3    -      -       -      +
    445C  ALA*     3.0    40.2    +      -       -      +
    446C  LEU      4.6     3.4    -      -       -      +
    447C  GLY*     4.4     6.1    -      -       -      +
    476C   NA      3.4    11.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with PRO 273 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    148C  GLN*     3.5    36.7    -      -       -      +
    151C  ARG*     4.2    15.9    -      -       +      +
    152C  SER*     3.6    23.1    -      -       -      +
    155C  THR*     4.5     4.7    -      -       +      +
    271C  ARG      3.3    10.3    -      -       -      +
    272C  ARG*     1.4    89.8    -      -       +      +
    274C  ASP*     1.3    50.7    +      -       -      +
    276C  LEU*     3.2     2.4    +      -       +      -
    277C  GLU*     2.7    35.8    +      -       -      +
    444C  LYS      5.9     0.2    -      -       -      +
    447C  GLY*     4.1    20.2    -      -       -      +
    450C  TRP*     5.6     2.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 274 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    152C  SER*     3.7    18.9    +      -       -      +
    272C  ARG*     2.8    44.7    +      -       -      +
    273C  PRO*     1.3    74.9    -      -       -      +
    275C  ILE*     1.3    72.5    +      -       -      +
    277C  GLU*     3.9    20.8    -      -       -      +
    278C  ALA*     3.3    20.8    +      -       -      +
    361C  ALA*     4.2     5.2    -      -       -      +
    476C   NA      3.0    13.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 275 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    268C  LEU*     3.7    34.8    -      -       +      +
    269C  LEU*     3.8    28.3    -      -       +      +
    272C  ARG*     3.2    13.6    +      -       +      +
    274C  ASP*     1.3    90.5    +      -       -      +
    276C  LEU*     1.3    58.1    +      -       -      +
    278C  ALA*     3.3     1.9    +      -       -      +
    279C  GLU      3.0    21.7    +      -       -      -
    358C  TYR*     3.6    28.7    -      -       +      -
    361C  ALA*     3.9    23.1    -      -       -      +
    362C  ILE*     4.1    16.8    -      -       +      -
    365C  ALA*     3.9    17.7    -      -       +      -
    476C   NA      4.2     0.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 276 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      9C  ARG*     4.7     0.4    -      -       -      +
    148C  GLN*     3.4    27.6    -      -       +      +
    269C  LEU      3.5    24.0    -      -       -      +
    270C  GLN*     3.4    34.3    -      -       -      +
    271C  ARG      4.5     5.6    -      -       -      +
    272C  ARG      3.2    13.0    +      -       -      +
    273C  PRO      3.2     7.0    +      -       -      +
    275C  ILE*     1.3    75.9    -      -       -      +
    277C  GLU*     1.3    63.2    +      -       -      +
    279C  GLU*     3.7    19.5    -      -       -      +
    280C  HIS*     3.0    40.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 277 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    145C  ALA*     3.3    32.1    -      -       +      +
    148C  GLN*     3.8    12.2    -      -       +      +
    149C  ALA*     3.6    28.6    -      -       -      +
    152C  SER*     4.7     2.6    -      -       -      -
    273C  PRO      2.7    19.5    +      -       -      +
    274C  ASP*     3.9    21.8    -      -       -      +
    275C  ILE      3.3     0.2    -      -       -      -
    276C  LEU*     1.3    74.1    -      -       -      +
    278C  ALA*     1.3    61.9    +      -       -      +
    280C  HIS      3.4     0.3    +      -       -      -
    281C  GLN*     3.2    25.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 278 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    274C  ASP      3.3    15.3    +      -       -      +
    275C  ILE      3.3     4.9    +      -       -      +
    277C  GLU*     1.3    77.0    -      -       -      +
    279C  GLU*     1.3    60.2    +      -       -      +
    281C  GLN*     3.4     8.4    +      -       -      +
    282C  LEU*     3.0    26.0    +      -       -      +
    354C  ASN*     4.7     3.1    -      -       -      +
    357C  GLN*     4.6     4.9    -      -       +      +
    358C  TYR*     3.9    29.9    -      -       +      +
    361C  ALA*     4.3     8.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 279 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      7C  TYR*     2.9    32.7    +      -       +      +
      9C  ARG*     2.8    43.9    +      -       -      +
    269C  LEU      4.6     1.6    -      -       -      +
    275C  ILE      3.0    16.9    +      -       -      +
    276C  LEU*     3.7    21.6    -      -       -      +
    277C  GLU      3.3     0.2    -      -       -      -
    278C  ALA*     1.3    74.0    -      -       -      +
    280C  HIS*     1.3    63.5    +      -       +      +
    282C  LEU*     3.1     7.7    +      -       +      +
    283C  MET*     2.9    36.0    +      -       -      +
    358C  TYR*     3.7    20.2    +      -       +      -
----------------------------------------------------------
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Residues in contact with HIS 280 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    141C  GLU*     2.8    42.4    +      -       -      +
    144C  LEU*     3.6    30.6    -      -       +      +
    145C  ALA*     3.6    21.5    -      -       +      +
    148C  GLN*     4.1    19.9    +      -       +      +
    276C  LEU*     3.0    38.0    +      -       +      +
    279C  GLU*     1.3    80.4    +      -       +      +
    281C  GLN*     1.3    55.3    +      -       -      +
    283C  MET*     3.4    12.1    +      -       +      -
    284C  ALA*     3.1    19.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 281 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     73C  PHE*     6.0     3.0    -      -       -      -
    142C  GLN*     4.2    28.9    +      -       -      +
    145C  ALA*     3.8    16.6    -      -       +      +
    146C  THR*     5.6     1.0    +      -       -      -
    277C  GLU*     3.2    22.3    +      -       +      +
    278C  ALA*     3.7    10.5    -      -       -      +
    279C  GLU      3.2     0.4    -      -       -      -
    280C  HIS*     1.3    72.7    -      -       -      +
    282C  LEU*     1.3    64.9    +      -       -      +
    284C  ALA*     3.3     6.7    +      -       -      +
    285C  ALA*     3.2    17.2    +      -       -      +
    354C  ASN*     3.7    22.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 282 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      7C  TYR*     4.0    20.6    -      -       +      +
      8C  GLN      5.4     0.2    -      -       -      +
     10C  PRO*     3.7    36.3    -      -       +      -
    278C  ALA      3.0    13.4    +      -       -      +
    279C  GLU*     3.3     8.3    -      -       -      +
    281C  GLN*     1.3    75.6    -      -       -      +
    283C  MET*     1.3    57.8    +      -       -      +
    285C  ALA*     3.5     2.1    +      -       -      +
    286C  ASN*     3.1    24.8    +      -       -      +
    351C  LYS*     3.4    38.6    -      -       +      +
    354C  ASN*     3.7    18.3    +      -       +      +
    355C  VAL*     3.6    16.8    -      -       +      +
    358C  TYR*     4.3    12.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 283 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      7C  TYR*     3.9    42.8    -      -       +      -
    141C  GLU*     3.3    47.3    -      -       +      +
    279C  GLU*     2.9    26.9    +      -       -      +
    280C  HIS*     3.6    15.7    -      -       +      +
    282C  LEU*     1.3    75.4    -      -       -      +
    284C  ALA*     1.3    62.6    +      -       -      +
    286C  ASN*     3.5     9.1    +      -       -      +
    287C  ALA*     3.2    22.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 284 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    138C  GLN*     3.2    47.9    -      -       +      +
    141C  GLU*     3.7    10.7    -      -       +      +
    142C  GLN*     3.8    20.0    -      -       +      +
    280C  HIS      3.1    13.9    +      -       -      +
    281C  GLN*     3.5    13.7    -      -       -      +
    282C  LEU      3.2     0.4    -      -       -      -
    283C  MET*     1.3    74.5    -      -       -      +
    285C  ALA*     1.3    63.4    +      -       -      +
    287C  ALA*     3.5     1.2    +      -       -      +
    288C  SER*     3.3    10.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 285 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    138C  GLN*     5.3     1.3    -      -       -      +
    281C  GLN      3.2     3.5    +      -       -      +
    282C  LEU      3.7     7.6    -      -       -      +
    283C  MET      3.4     0.2    -      -       -      -
    284C  ALA*     1.3    74.7    -      -       -      +
    286C  ASN*     1.3    63.6    +      -       -      +
    288C  SER*     2.6    26.4    +      -       -      +
    289C  ILE*     3.4    11.5    +      -       -      +
    347C  ALA      4.3     1.7    -      -       -      +
    350C  GLN*     3.8    14.4    -      -       +      +
    351C  LYS*     3.8    13.7    -      -       -      +
    354C  ASN*     3.3    29.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 286 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      4C  ILE*     3.5    11.9    -      -       -      +
      5C  PRO*     2.8    48.3    +      -       -      +
      7C  TYR*     3.9    23.3    -      -       +      +
    282C  LEU      3.1    15.0    +      -       -      +
    283C  MET*     3.6    12.5    +      -       -      +
    284C  ALA      3.3     0.2    -      -       -      -
    285C  ALA*     1.3    76.3    -      -       -      +
    287C  ALA*     1.3    61.3    +      -       -      +
    289C  ILE*     3.3    22.4    +      -       -      +
    351C  LYS*     2.8    38.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 287 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      4C  ILE*     3.8    17.1    -      -       +      +
    134C  SER*     3.3    25.1    -      -       -      +
    137C  ASP*     4.0    12.1    -      -       +      +
    138C  GLN*     3.7    27.4    -      -       -      +
    141C  GLU*     5.7     0.4    -      -       +      -
    283C  MET      3.2    13.7    +      -       -      +
    284C  ALA      3.7     7.0    -      -       -      +
    285C  ALA      3.3     0.2    -      -       -      -
    286C  ASN*     1.3    76.9    -      -       -      +
    288C  SER*     1.3    62.1    +      -       -      +
    290C  GLY*     3.1    11.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 288 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    134C  SER      5.1     0.2    -      -       -      -
    135C  LEU*     5.4     1.3    -      -       -      -
    138C  GLN*     3.4    36.5    -      -       -      +
    284C  ALA      3.3     4.7    +      -       -      -
    285C  ALA*     2.6    24.6    +      -       -      +
    287C  ALA*     1.3    75.3    -      -       -      +
    289C  ILE*     1.3    63.1    +      -       -      +
    291C  ALA*     3.3    11.6    +      -       -      +
    292C  ALA*     3.2    20.4    +      -       -      +
    347C  ALA*     4.1    15.9    +      -       -      +
    350C  GLN*     5.4     2.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 289 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      5C  PRO*     3.7    20.2    -      -       +      -
    285C  ALA      3.6    11.9    -      -       -      +
    286C  ASN*     3.3     9.4    +      -       -      +
    287C  ALA      3.2     0.2    -      -       -      -
    288C  SER*     1.3    78.0    +      -       -      +
    290C  GLY*     1.3    57.3    +      -       -      +
    292C  ALA*     3.1     3.1    +      -       -      +
    293C  ARG*     3.0    53.4    +      -       -      +
    344C  LEU*     4.0    12.8    -      -       +      -
    347C  ALA*     3.6    30.7    -      -       +      +
    348C  LYS*     4.1    15.9    -      -       +      +
    351C  LYS*     3.8    31.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 290 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      3C  LEU*     3.7    14.0    -      -       -      +
      4C  ILE*     3.7    27.2    -      -       -      +
    129C  PHE      4.7     0.5    -      -       -      +
    130C  GLY      4.1     1.0    -      -       -      +
    134C  SER*     3.4    13.8    +      -       -      -
    286C  ASN      3.8     2.0    +      -       -      -
    287C  ALA      3.1    11.3    +      -       -      -
    289C  ILE*     1.3    79.2    -      -       -      +
    291C  ALA*     1.3    56.9    +      -       -      +
    293C  ARG      4.0     0.2    -      -       -      -
    294C  ALA*     3.3    24.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 291 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    131C  ARG*     3.6    39.0    -      -       +      +
    134C  SER*     3.6    11.6    -      -       -      -
    135C  LEU*     3.8    25.4    -      -       +      -
    287C  ALA      4.6     0.2    -      -       -      +
    288C  SER*     3.3    11.5    +      -       -      +
    289C  ILE      3.1     0.6    -      -       -      -
    290C  GLY*     1.3    76.1    -      -       -      +
    292C  ALA*     1.3    63.3    +      -       -      +
    293C  ARG      3.2     0.7    -      -       -      -
    294C  ALA      3.5     1.0    +      -       -      -
    295C  ALA*     3.4    18.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 292 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    288C  SER      3.2     9.2    +      -       -      +
    289C  ILE      3.1     8.7    +      -       -      +
    291C  ALA*     1.3    78.6    -      -       -      +
    293C  ARG*     1.3    59.5    +      -       -      +
    295C  ALA*     3.5    16.6    -      -       -      +
    296C  PHE*     3.7    15.2    -      -       -      -
    340C  LEU      4.8     2.1    -      -       -      +
    343C  SER*     3.7    29.0    -      -       -      +
    344C  LEU*     3.9    15.7    -      -       +      +
    347C  ALA*     4.1     8.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 293 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      3C  LEU*     3.0    46.6    +      -       +      +
      4C  ILE      4.5     0.2    -      -       -      -
      5C  PRO*     3.5    32.6    -      -       -      +
    289C  ILE*     3.0    27.8    +      -       -      +
    290C  GLY      4.1     0.2    -      -       -      +
    292C  ALA*     1.3    74.1    -      -       -      +
    294C  ALA*     1.3    57.6    +      -       -      +
    295C  ALA      3.0     9.4    +      -       -      -
    296C  PHE*     3.2    20.7    +      -       +      +
    297C  PHE*     3.3    15.8    -      -       +      -
    344C  LEU*     3.6    22.1    -      -       +      +
    348C  LYS*     4.4    16.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 294 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      3C  LEU*     3.6     8.2    -      -       +      +
    129C  PHE*     3.4    31.5    -      -       +      +
    131C  ARG*     3.7    30.1    -      -       +      +
    290C  GLY      3.3    15.8    +      -       -      +
    291C  ALA      3.5     1.9    +      -       -      +
    293C  ARG*     1.3    75.5    -      -       -      +
    295C  ALA*     1.3    61.5    +      -       -      +
    296C  PHE      3.3     0.4    -      -       -      -
    297C  PHE*     3.4    22.8    +      -       -      +
    298C  PRO      5.2     0.9    -      -       -      +
    299C  SER*     6.2     0.3    -      -       -      -
----------------------------------------------------------
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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