Contacts of the helix formed by residues 274 - 295 (chain B) in PDB entry 5U3W


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 PHE 274 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    254A  VAL*     3.8    10.3    -      -       +      -
    257A  VAL*     4.7     3.4    -      -       +      -
    258A  ARG*     3.4    58.6    -      -       +      -
    261A  THR*     5.7     0.2    -      -       -      -
    430A  HIS*     4.9     5.2    -      +       -      -
    432A  LEU*     3.3    34.3    -      -       +      -
    503A  B7G      3.7    14.6    -      -       +      -
    272B  SER      5.6     1.3    -      -       -      -
    273B  LEU*     1.3    76.7    -      -       -      +
    275B  LEU*     1.3    66.1    +      -       -      +
    276B  ASN*     3.0    19.3    -      -       -      +
    277B  ASP*     3.0    17.5    +      -       -      +
    278B  GLN*     3.1     8.5    +      -       -      +
    365B  MET*     3.7    24.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 275 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    261A  THR*     4.4    10.2    -      -       +      +
    265A  LYS*     4.4    14.4    -      -       +      +
    270A  PHE*     5.1     1.1    -      -       +      -
    275A  LEU*     4.0    10.3    -      -       +      -
    278A  GLN*     3.9    29.2    -      -       +      +
    279A  VAL*     3.8    15.3    -      -       +      -
    282A  LEU*     3.6    27.4    -      -       +      -
    503A  B7G      3.5    18.2    -      -       +      +
    265B  LYS*     3.9    12.3    -      -       -      +
    273B  LEU      3.6     1.0    +      -       -      -
    274B  PHE*     1.3    73.6    -      -       -      +
    276B  ASN*     1.3    61.8    +      -       -      +
    278B  GLN*     3.2    33.6    +      -       -      +
    279B  VAL*     3.0    26.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 276 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    279A  VAL*     4.0     5.2    -      -       -      +
    432A  LEU*     3.6    13.5    -      -       -      +
    435A  GLU*     4.1    15.4    -      -       -      +
    503A  B7G      3.1    54.6    +      -       +      +
    274B  PHE*     3.0    25.3    -      -       -      +
    275B  LEU*     1.3    74.5    +      -       -      +
    277B  ASP*     1.3    58.9    +      -       -      +
    279B  VAL      3.4     0.7    +      -       -      -
    280B  THR*     3.1    26.7    +      -       -      -
    365B  MET*     3.5    32.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 277 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    273B  LEU*     4.3    18.4    -      -       +      +
    274B  PHE*     3.0    11.5    +      -       -      +
    276B  ASN*     1.3    79.4    +      -       -      +
    278B  GLN*     1.3    66.7    +      -       -      +
    280B  THR*     3.7     6.2    +      -       -      -
    281B  LEU*     2.9    30.7    +      -       -      +
    363B  GLY      4.5     1.7    -      -       -      +
    364B  LEU*     3.7    14.3    -      -       +      +
    365B  MET*     2.8    41.5    +      -       -      +
    366B  ASN*     3.0    30.8    +      -       -      +
    370B  VAL*     5.3     1.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 278 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    265A  LYS*     4.7     3.4    -      -       -      +
    275A  LEU*     4.1     8.6    -      -       +      +
    265B  LYS*     2.9    29.0    +      -       -      +
    270B  PHE*     3.5    49.5    +      -       +      +
    271B  SER*     3.3    20.4    +      -       -      +
    273B  LEU*     3.1    23.2    +      -       +      +
    274B  PHE      3.1    10.8    +      -       -      +
    275B  LEU*     3.4    24.4    -      -       -      +
    277B  ASP*     1.3    78.1    -      -       -      +
    279B  VAL*     1.3    56.8    +      -       -      +
    281B  LEU*     3.3     3.2    +      -       -      +
    282B  LEU*     3.0    32.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 279 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    275A  LEU*     3.5    34.3    -      -       +      +
    276A  ASN*     4.1     3.8    -      -       +      -
    279A  VAL*     3.4    29.6    -      -       +      -
    501A  B7G      3.8    42.3    -      -       +      +
    503A  B7G      3.8    13.9    -      -       -      +
    275B  LEU      3.0     8.2    +      -       -      +
    276B  ASN      3.7     7.0    -      -       -      +
    278B  GLN*     1.3    71.5    -      -       -      +
    280B  THR*     1.3    57.8    +      -       -      +
    282B  LEU*     3.8     3.4    -      -       -      +
    283B  LYS*     2.7    34.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 280 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    503A  B7G      3.8    15.2    -      -       -      -
    276B  ASN      3.1    19.1    +      -       -      -
    277B  ASP*     3.7     6.3    +      -       -      -
    279B  VAL*     1.3    78.3    -      -       -      +
    281B  LEU*     1.3    62.4    +      -       -      +
    283B  LYS*     3.4     6.2    +      -       -      -
    284B  TYR*     3.3    29.1    +      -       +      +
    361B  ARG*     4.2     6.0    -      -       +      +
    362B  PRO      3.3    26.4    +      -       -      +
    363B  GLY*     4.5     7.6    +      -       -      -
    364B  LEU*     3.7    27.6    -      -       +      +
----------------------------------------------------------
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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
----------------------------------------------------------
    270B  PHE*     4.0    13.5    -      -       +      -
    273B  LEU*     3.8    28.9    -      -       +      -
    277B  ASP      2.9    19.2    +      -       -      +
    278B  GLN      3.7     3.4    -      -       -      +
    280B  THR*     1.3    75.2    -      -       -      +
    282B  LEU*     1.3    59.2    +      -       -      +
    284B  TYR*     3.9     0.7    -      -       -      +
    285B  GLY*     3.0    28.1    +      -       -      -
    356B  ILE*     3.5    26.9    -      -       +      +
    357B  LEU*     4.0    15.5    -      -       +      -
    358B  CYS      3.5    26.5    -      -       -      +
    361B  ARG*     4.0     9.3    +      -       +      -
    364B  LEU*     3.7    21.3    -      -       +      -
    370B  VAL*     4.1     8.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 282 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    275A  LEU*     3.6    31.2    -      -       +      -
    501A  B7G      3.9    17.0    -      -       +      -
    260B  LEU*     4.2    19.1    -      -       +      +
    261B  THR*     3.8    24.0    -      -       +      +
    264B  ALA*     4.3     2.7    -      -       +      -
    270B  PHE*     4.0    13.0    -      -       +      -
    278B  GLN      3.0    12.2    +      -       -      +
    279B  VAL      3.8     3.1    -      -       -      +
    281B  LEU*     1.3    75.2    -      -       -      +
    283B  LYS*     1.3    66.3    +      -       -      +
    285B  GLY*     4.5     0.7    -      -       -      +
    286B  VAL*     2.9    49.7    +      -       +      +
    356B  ILE*     4.2    20.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 283 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    501A  B7G      3.4    59.4    +      -       +      +
    279B  VAL*     2.7    22.8    +      -       +      +
    280B  THR*     3.6     7.9    -      -       -      +
    282B  LEU*     1.3    74.0    -      -       -      +
    284B  TYR*     1.3    99.5    +      -       +      +
    286B  VAL*     4.2     3.6    -      -       -      +
    287B  HIS*     5.0     0.9    +      -       -      -
    435B  GLU      3.9     1.6    -      -       -      -
    436B  ILE*     3.2    53.5    -      -       -      +
    439B  ASP*     3.5    23.4    +      -       -      +
    440B  MET*     3.9     2.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 284 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    280B  THR*     3.3    21.7    +      -       +      +
    283B  LYS*     1.3   111.8    +      -       +      +
    285B  GLY*     1.3    58.1    +      -       -      +
    286B  VAL      3.8     0.4    -      -       -      -
    287B  HIS*     5.3     1.2    +      -       -      +
    288B  GLU*     3.8     9.7    +      -       -      +
    361B  ARG*     3.4    42.7    +      -       +      +
    362B  PRO*     3.7    54.4    +      -       +      +
    410B  VAL*     5.4     3.8    -      -       -      +
    439B  ASP*     3.4    24.0    +      -       -      +
    440B  MET*     3.8    31.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 285 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    281B  LEU      3.0    17.1    +      -       -      -
    284B  TYR*     1.3    79.5    -      -       -      +
    286B  VAL*     1.3    65.8    +      -       -      +
    287B  HIS      3.3     2.2    -      -       -      -
    288B  GLU*     3.3     7.0    +      -       -      +
    289B  ALA*     3.0    18.7    +      -       -      +
    355B  ILE*     3.6     6.5    -      -       -      +
    356B  ILE*     3.7    12.3    -      -       -      -
    361B  ARG*     3.7    16.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 286 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    501A  B7G      5.5     0.2    -      -       +      -
    257B  VAL*     4.0    31.0    -      -       +      -
    260B  LEU*     4.0    23.8    -      -       +      -
    282B  LEU*     2.9    47.8    +      -       +      +
    283B  LYS      4.2     2.7    -      -       -      +
    285B  GLY*     1.3    76.5    -      -       -      +
    287B  HIS*     1.3    69.0    +      -       +      +
    289B  ALA*     3.2     1.9    +      -       -      +
    290B  ILE*     2.7    33.5    +      -       +      +
    356B  ILE*     4.2     1.5    -      -       +      +
    436B  ILE*     4.0    27.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with HIS 287 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    253B  THR*     4.1    13.8    -      -       +      +
    283B  LYS      5.0     0.8    +      -       -      -
    284B  TYR      5.3     1.6    +      -       -      +
    285B  GLY      3.3     0.6    -      -       -      +
    286B  VAL*     1.3    82.8    -      -       +      +
    288B  GLU*     1.3    62.9    +      -       -      +
    290B  ILE*     3.7     8.3    -      -       +      +
    291B  PHE*     3.0    44.0    +      +       +      -
    410B  VAL*     3.8    25.8    -      -       +      +
    413B  HIS*     4.1    10.3    -      +       -      -
    433B  LEU*     4.4     4.5    -      -       +      -
    436B  ILE*     3.8    35.0    -      -       +      +
    437B  TYR*     2.8    40.9    +      +       -      -
    440B  MET*     5.3     1.8    -      -       -      +
    501B  7U1      3.1    17.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 288 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    284B  TYR      3.8     8.0    +      -       -      +
    285B  GLY      3.3     8.3    +      -       -      +
    287B  HIS*     1.3    75.8    -      -       -      +
    289B  ALA*     1.3    63.1    +      -       -      +
    291B  PHE      3.5     0.2    +      -       -      -
    292B  ALA*     3.1    23.4    +      -       -      +
    355B  ILE*     3.6    17.8    -      -       +      +
    361B  ARG*     2.9    42.0    +      -       -      -
    403B  MET*     4.5     7.8    -      -       -      +
    406B  LEU*     3.6    24.9    -      -       +      +
    407B  ARG*     3.7    30.4    +      -       -      +
    410B  VAL*     3.5    25.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 289 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    260B  LEU*     3.8    28.5    -      -       +      -
    285B  GLY      3.0    12.6    +      -       -      +
    286B  VAL      3.5     7.6    -      -       -      +
    288B  GLU*     1.3    75.6    -      -       -      +
    290B  ILE*     1.3    66.0    +      -       -      +
    292B  ALA*     3.2     2.6    +      -       -      +
    293B  MET*     3.0    29.6    +      -       -      +
    352B  ILE*     4.0    21.3    -      -       +      -
    355B  ILE*     3.8     5.7    -      -       +      +
    356B  ILE*     4.0     8.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 290 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    253B  THR*     3.9    23.8    -      -       +      +
    256B  THR*     3.6    24.5    -      -       +      -
    257B  VAL*     3.9    28.5    -      -       +      -
    260B  LEU*     3.9     4.0    -      -       +      -
    286B  VAL*     2.7    28.4    +      -       +      +
    287B  HIS*     3.7    11.2    -      -       +      +
    289B  ALA*     1.3    72.4    -      -       -      +
    291B  PHE*     1.3    65.0    +      -       +      +
    293B  MET*     3.3     8.7    +      -       -      +
    294B  LEU*     2.8    27.5    +      -       -      +
    501B  7U1      3.6    36.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 291 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    253B  THR*     6.1     0.2    -      -       -      -
    287B  HIS*     3.0    33.8    +      +       +      +
    290B  ILE*     1.3    90.1    -      -       +      +
    292B  ALA*     1.3    61.3    +      -       -      +
    294B  LEU*     3.5    20.4    -      -       +      +
    295B  ALA*     4.1     2.6    +      -       -      +
    331B  LYS*     3.5    41.3    -      -       +      +
    334B  PHE*     3.9    13.2    -      -       -      -
    335B  ALA*     5.6     1.2    -      -       -      +
    406B  LEU*     3.9    16.8    -      -       +      -
    409B  LEU*     3.9    21.1    -      -       +      -
    410B  VAL*     3.8    22.9    -      -       +      -
    413B  HIS*     3.8    32.3    -      +       +      -
    501B  7U1      4.4    16.4    -      +       +      -
----------------------------------------------------------
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Residues in contact with ALA 292 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    288B  GLU      3.1    17.7    +      -       -      +
    289B  ALA      3.6     4.7    -      -       -      +
    290B  ILE      3.2     0.2    -      -       -      -
    291B  PHE*     1.3    77.7    -      -       -      +
    293B  MET*     1.3    61.1    +      -       -      +
    294B  LEU      3.4     0.7    +      -       -      -
    295B  ALA*     3.4    19.6    +      -       -      +
    296B  SER*     4.5     1.6    +      -       -      -
    334B  PHE*     4.3     9.0    -      -       -      -
    338B  PHE*     3.8    14.3    -      -       +      -
    348B  LEU*     5.0     2.6    -      -       +      +
    351B  PHE*     3.9    21.8    -      -       +      -
    352B  ILE*     3.7    18.6    -      -       +      -
    355B  ILE*     4.2     0.4    -      -       +      -
    406B  LEU*     4.0     7.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with MET 293 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    186B  TYR*     4.8     9.6    -      -       +      +
    190B  PHE*     3.9    33.0    -      -       +      -
    256B  THR*     3.6    30.7    -      -       +      -
    260B  LEU*     3.7    24.7    -      -       +      -
    289B  ALA      3.0    22.8    +      -       -      +
    290B  ILE*     3.9     3.8    -      -       -      +
    292B  ALA*     1.3    72.0    -      -       -      +
    294B  LEU*     1.3    65.5    +      -       -      +
    295B  ALA      3.2     0.7    -      -       -      -
    296B  SER*     3.0    26.9    +      -       -      +
    297B  ILE*     4.2     3.1    +      -       -      +
    348B  LEU*     5.9     5.4    -      -       +      -
    352B  ILE*     3.8    24.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 294 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    290B  ILE      2.8    16.6    +      -       -      +
    291B  PHE*     3.5    15.3    -      -       +      +
    292B  ALA      3.2     0.2    -      -       -      -
    293B  MET*     1.3    77.4    -      -       -      +
    295B  ALA*     1.3    62.1    +      -       -      +
    297B  ILE*     3.0    26.5    +      -       +      +
    298B  VAL*     3.2    32.1    -      -       +      +
    303B  LEU*     3.9    20.6    -      -       +      -
    331B  LYS*     3.8    28.9    -      -       +      +
    335B  ALA*     5.4     0.9    -      -       +      -
    501B  7U1      3.5    50.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 295 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    198B  ARG*     3.4     0.9    +      -       -      -
    291B  PHE      4.1     2.8    +      -       -      +
    292B  ALA      3.4    15.1    +      -       -      +
    293B  MET      3.2     0.2    -      -       -      -
    294B  LEU*     1.3    78.7    -      -       -      +
    296B  SER*     1.3    62.0    +      -       -      +
    298B  VAL*     3.2    10.2    +      -       -      +
    334B  PHE*     5.4     0.4    -      -       +      -
    335B  ALA*     3.9    30.5    -      -       +      +
    338B  PHE*     3.7    18.6    -      -       +      -
    339B  ASN*     2.9    39.3    +      -       -      +
----------------------------------------------------------
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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