Contacts of the helix formed by residues 267 - 288 (chain B) in PDB entry 6F0X


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 GLY 267 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    263A  ALA*     5.9     6.7    -      -       -      +
    264A  CYS*     5.7     4.0    -      -       -      +
    264B  CYS*     3.1    21.1    +      -       -      -
    266B  ALA*     1.3    72.4    -      -       -      +
    268B  THR*     1.3    56.0    +      -       -      +
    269B  GLU      3.4     0.4    -      -       -      -
    270B  PRO*     3.7     5.6    -      -       -      +
    271B  SER*     2.8    30.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with THR 268 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    266A  ALA      5.1     6.5    -      -       -      -
    267A  GLY*     5.6     1.6    -      -       -      -
    268A  THR*     3.4    31.2    -      -       -      -
    266B  ALA      2.7     8.8    +      -       -      -
    267B  GLY*     1.3    70.4    -      -       -      +
    269B  GLU*     1.3    66.6    +      -       -      -
    271B  SER*     3.2     6.8    +      -       -      -
    272B  ASP*     3.0    22.7    +      -       -      +
      2Z  ALA      5.1     1.8    -      -       -      -
      3Z  LEU*     3.4    27.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 269 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    260B  ALA*     5.5     1.1    -      -       -      -
    265B  ARG      4.8     2.9    -      -       -      +
    266B  ALA*     3.0     7.1    +      -       -      +
    268B  THR*     1.3    76.1    -      -       -      +
    270B  PRO*     1.3    62.5    -      -       -      +
    272B  ASP*     4.5     0.3    -      -       -      +
    273B  ALA*     2.9    29.5    +      -       -      +
    222C  PHE*     4.5    11.9    -      -       +      -
    268C  THR*     2.8    19.6    -      -       -      +
    269C  GLU*     3.1    19.7    -      -       -      +
    270C  PRO*     3.4     7.4    -      -       -      +
    271C  SER*     4.6     6.9    +      -       -      -
    272C  ASP*     4.6     4.2    -      -       -      +
      2Z  ALA*     2.7    57.6    +      -       -      +
      3Z  LEU*     3.3    14.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with PRO 270 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    304A  LYS*     4.0    10.5    -      -       -      +
    260B  ALA*     4.7     4.7    -      -       +      -
    263B  ALA      3.1    28.2    -      -       -      +
    264B  CYS*     3.7    17.5    -      -       +      -
    265B  ARG      4.9     0.6    -      -       -      +
    266B  ALA      3.9     0.6    -      -       -      -
    267B  GLY*     3.5    10.6    -      -       -      +
    268B  THR      3.4     0.4    -      -       -      -
    269B  GLU*     1.3    77.8    -      -       -      +
    271B  SER*     1.3    63.5    +      -       -      +
    273B  ALA*     4.5     3.8    -      -       +      -
    274B  ILE*     2.9    36.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 271 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    259A  ALA*     3.1    37.0    -      -       -      +
    260A  ALA*     5.4     0.4    -      -       -      -
    268A  THR*     5.7     3.6    -      -       -      -
    267B  GLY      2.8    21.7    +      -       -      -
    268B  THR*     3.3     9.6    -      -       -      -
    270B  PRO*     1.3    73.3    -      -       -      +
    272B  ASP*     1.3    66.0    +      -       -      +
    274B  ILE*     3.8     2.3    -      -       -      +
    275B  ARG*     2.9    29.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 272 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    268A  THR*     4.4     3.7    +      -       -      +
    218B  PHE*     5.0     2.5    -      -       +      -
    221B  TRP      5.7     0.5    -      -       -      +
    222B  PHE*     3.1    23.0    -      -       -      -
    223B  SER      5.5     2.0    -      -       -      +
    225B  SER*     5.8     3.8    -      -       -      +
    268B  THR      3.0    14.2    +      -       -      +
    269B  GLU      4.5     0.7    -      -       -      +
    271B  SER*     1.3    77.2    -      -       -      +
    273B  ALA*     1.3    66.9    +      -       -      +
    275B  ARG*     2.4    41.2    +      -       -      +
    276B  VAL*     3.0    27.6    +      -       +      +
    222C  PHE*     5.2    11.7    -      -       +      -
      3Z  LEU*     3.9    23.7    -      -       +      +
      5Z  LEU*     5.0     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 273 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    218B  PHE*     4.4    13.5    -      -       +      -
    257B  LEU      4.4     3.4    -      -       -      +
    258B  THR      6.4     0.2    -      -       -      -
    260B  ALA*     3.9    25.6    -      -       +      -
    269B  GLU      2.9    20.2    +      -       -      +
    270B  PRO      3.9     0.4    -      -       -      +
    272B  ASP*     1.3    76.9    -      -       -      +
    274B  ILE*     1.3    56.4    +      -       -      +
    276B  VAL*     2.9     8.1    +      -       -      +
    277B  VAL*     2.9    30.9    +      -       +      +
    222C  PHE*     4.8     4.1    -      -       +      -
    271C  SER*     4.6    14.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 274 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    255A  GLU*     3.9    30.7    -      -       +      +
    256A  SER*     6.1     1.3    -      -       -      -
    304A  LYS*     3.5    22.7    -      -       -      +
    260B  ALA      4.1     5.4    -      -       -      +
    261B  ARG*     3.4    64.2    -      -       -      +
    270B  PRO*     2.9    24.8    +      -       +      +
    271B  SER*     4.0     2.2    -      -       -      +
    273B  ALA*     1.3    71.7    -      -       +      +
    275B  ARG*     1.3    59.0    +      -       -      +
    276B  VAL      2.8    10.5    +      -       -      -
    277B  VAL*     3.9     6.5    -      -       +      -
    278B  ASN*     3.0    25.8    +      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 275 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    215A  HIS*     3.1    24.8    -      -       +      +
    218A  PHE*     4.1    28.2    -      -       +      -
    256A  SER*     4.5    10.5    +      -       -      +
    259A  ALA*     3.2    40.9    +      -       +      +
    260A  ALA*     5.4     2.8    -      -       -      +
    273A  ALA*     5.6     1.8    -      -       -      +
    222B  PHE*     3.1    30.1    -      -       -      -
    223B  SER*     3.6    25.2    +      -       -      +
    225B  SER*     4.9     5.4    -      -       -      +
    226B  GLY      6.2     0.2    -      -       -      +
    271B  SER      2.9    15.7    +      -       -      +
    272B  ASP*     2.4    44.4    +      -       -      +
    274B  ILE*     1.3    75.5    -      -       -      +
    276B  VAL*     1.3    52.6    +      -       -      +
    278B  ASN*     2.6    30.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 276 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    215A  HIS*     4.7     3.4    -      -       +      -
    217B  LEU*     4.8     6.7    -      -       +      +
    218B  PHE*     3.3    42.4    -      -       +      -
    225B  SER*     3.5    31.2    -      -       -      +
    229B  VAL*     4.3    16.8    -      -       +      +
    257B  LEU*     5.1     3.8    -      -       +      +
    272B  ASP      3.3     9.6    -      -       -      +
    273B  ALA      2.9     7.7    +      -       -      +
    274B  ILE      2.8     0.8    +      -       -      -
    275B  ARG*     1.3    76.8    -      -       -      +
    277B  VAL*     1.3    67.1    +      -       -      +
    278B  ASN*     3.0     6.0    -      -       -      +
    279B  ALA*     3.0     3.1    +      -       -      +
    280B  VAL*     2.9    33.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 277 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    257B  LEU      3.1    24.9    -      -       -      +
    258B  THR*     3.6    35.2    -      -       -      +
    261B  ARG*     3.2    28.3    -      -       -      +
    273B  ALA*     2.9    23.7    +      -       +      +
    274B  ILE*     3.0     9.4    +      -       +      +
    276B  VAL*     1.3    74.9    -      -       -      +
    278B  ASN*     1.3    66.1    +      -       -      +
    280B  VAL*     3.1    14.9    +      -       +      +
    281B  LEU*     3.0    28.9    +      -       +      +
    306B  ASP*     5.3     2.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 278 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    214A  SER*     4.4     0.8    +      -       -      -
    215A  HIS*     3.7    16.8    -      -       -      +
    253A  GLN*     3.5    32.3    +      -       +      +
    255A  GLU*     5.1     0.4    -      -       -      +
    256A  SER*     3.8    19.0    +      -       -      -
    261B  ARG*     3.9    10.2    -      -       -      +
    274B  ILE*     3.0    12.2    +      -       +      +
    275B  ARG*     2.6    40.8    +      -       -      +
    276B  VAL      3.0     3.6    -      -       -      +
    277B  VAL*     1.3    76.0    -      -       -      +
    279B  ALA*     1.3    85.0    +      -       -      +
    281B  LEU*     3.0     5.7    +      -       -      +
    282B  THR*     2.9    26.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 279 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    213A  ASN*     5.2     1.3    -      -       -      +
    215A  HIS*     3.2    49.4    -      -       +      +
    229B  VAL*     4.1    11.2    -      -       +      -
    276B  VAL      3.7     3.6    -      -       -      +
    278B  ASN*     1.3    85.8    +      -       -      +
    280B  VAL*     1.3    66.1    +      -       -      +
    282B  THR*     2.5    27.1    +      -       -      +
    283B  GLN*     2.8    17.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 280 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    217B  LEU*     5.8     3.1    -      -       +      -
    229B  VAL*     5.2     2.9    -      -       +      +
    232B  MET*     6.5     0.4    -      -       +      -
    233B  PHE*     4.2    16.5    -      -       +      -
    251B  ILE*     5.6     2.9    -      -       +      -
    257B  LEU*     4.3    35.7    -      -       +      -
    258B  THR*     6.3     1.3    -      -       -      -
    276B  VAL*     2.9    29.2    +      -       +      +
    277B  VAL*     3.1    17.2    +      -       +      +
    279B  ALA*     1.3    78.9    -      -       -      +
    281B  LEU*     1.3    66.8    +      -       +      +
    283B  GLN*     3.7     2.1    -      -       -      +
    284B  ILE*     3.0    39.0    +      -       +      +
    309B  PHE*     4.6    11.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 281 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    253A  GLN*     6.1     0.4    -      -       -      +
    300A  ASN*     5.6     2.7    -      -       +      +
    901A  AGS      5.3     7.9    -      -       -      +
    261B  ARG*     4.0    24.0    -      -       -      +
    277B  VAL*     3.5    13.2    -      -       +      +
    278B  ASN*     3.0     7.6    +      -       -      +
    280B  VAL*     1.3    76.2    -      -       +      +
    282B  THR*     1.3    64.1    +      -       +      +
    284B  ILE*     3.1    21.8    +      -       +      +
    285B  ASP*     3.0    25.7    +      -       -      +
    306B  ASP*     5.3     0.4    -      -       -      +
    308B  ALA*     4.4    15.7    -      -       +      -
    309B  PHE*     4.0    27.4    -      -       +      +
    312B  ARG*     3.7    37.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with THR 282 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    211A  GLU*     5.6     2.2    -      -       -      +
    213A  ASN*     4.4    20.2    +      -       -      +
    252A  ASP*     4.2     8.3    -      -       -      +
    253A  GLN*     3.5    24.7    -      -       -      +
    901A  AGS      6.6     0.2    -      -       -      -
    278B  ASN      2.9    17.2    +      -       -      +
    279B  ALA*     2.5    28.8    +      -       -      +
    281B  LEU*     1.3    76.5    -      -       +      +
    283B  GLN*     1.3    64.0    +      -       -      +
    285B  ASP*     3.0     8.3    +      -       -      +
    286B  GLN*     2.8    41.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 283 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    229B  VAL*     4.7     4.5    -      -       +      -
    230B  THR*     6.2     2.0    -      -       -      +
    233B  PHE*     3.2    59.8    -      -       +      +
    279B  ALA*     2.8    18.7    +      -       +      +
    282B  THR*     1.3    83.3    +      -       -      +
    284B  ILE*     1.3    65.0    +      -       -      +
    286B  GLN*     3.0    23.4    +      -       -      +
    287B  ILE*     2.9    38.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 284 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    172B  ASN*     4.8    12.3    -      -       +      +
    174B  VAL*     3.8    27.1    -      -       +      -
    233B  PHE*     4.6     5.8    -      -       +      -
    251B  ILE*     6.1     2.9    -      -       +      -
    280B  VAL*     3.0    29.1    +      -       +      +
    281B  LEU*     3.2    20.6    -      -       +      +
    283B  GLN*     1.3    76.3    -      -       -      +
    285B  ASP*     1.3    71.7    -      -       -      +
    287B  ILE*     3.0    11.4    -      -       -      +
    288B  LYS*     3.0    21.7    +      -       +      +
    295B  ILE*     4.9     7.6    -      -       +      -
    309B  PHE*     3.5    36.8    -      -       +      -
    312B  ARG*     5.2     9.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 285 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    386A  ARG*     4.2     4.6    +      -       -      -
    901A  AGS      3.7     7.4    +      -       -      -
    172B  ASN*     5.0     1.6    -      -       -      +
    281B  LEU      3.0    12.7    +      -       -      +
    282B  THR*     3.7     7.2    -      -       -      +
    284B  ILE*     1.3    82.7    -      -       -      +
    286B  GLN*     1.3    61.2    +      -       +      +
    287B  ILE      2.9     6.3    +      -       -      -
    288B  LYS*     3.1    52.9    +      -       -      +
    289B  ARG*     4.3     8.5    +      -       -      +
    312B  ARG*     2.7    34.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 286 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    123A  ASN*     4.8     7.4    +      -       -      +
    125A  TRP*     5.8     0.6    -      -       -      -
    211A  GLU*     3.0    34.1    +      -       -      -
    213A  ASN*     5.6     2.6    -      -       -      +
    237B  GLN*     5.1     1.0    -      -       -      +
    282B  THR*     2.8    26.3    +      -       -      +
    283B  GLN*     3.0    28.8    +      -       -      +
    285B  ASP*     1.3    75.2    -      -       +      +
    287B  ILE*     1.3    60.8    +      -       +      +
    289B  ARG*     5.0     3.5    -      -       -      +
    290B  HIS*     3.9    13.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 287 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    173B  ARG*     4.2     1.4    +      -       -      -
    233B  PHE*     4.4    21.8    -      -       +      +
    236B  ILE*     4.8    12.1    -      -       +      -
    237B  GLN*     4.2    15.9    -      -       +      +
    240B  ILE*     4.4    15.3    -      -       +      -
    249B  VAL*     5.4     1.1    -      -       +      -
    283B  GLN*     2.9    29.6    +      -       -      +
    284B  ILE*     3.0    17.5    -      -       -      +
    286B  GLN*     1.3    84.3    -      -       -      +
    288B  LYS*     1.3    57.5    +      -       -      +
    289B  ARG      2.7    13.2    +      -       -      -
    290B  HIS*     2.8    25.6    +      -       -      +
    293B  VAL*     4.9    11.2    -      -       +      +
    295B  ILE*     3.9    28.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 288 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    386A  ARG*     4.1    15.4    -      -       -      +
    901A  AGS      4.1    17.0    +      -       -      -
    170B  THR*     4.1    16.9    -      -       -      +
    171B  TRP*     4.4     8.2    -      -       -      +
    172B  ASN*     3.8    36.6    -      -       +      +
    173B  ARG*     2.1    44.5    +      -       -      +
    284B  ILE*     3.0    12.2    +      -       +      +
    285B  ASP*     3.2    43.8    +      -       -      +
    287B  ILE*     1.3    74.7    -      -       +      +
    289B  ARG*     1.3    64.1    +      -       +      +
    293B  VAL*     6.2     0.2    -      -       -      -
----------------------------------------------------------
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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