Contacts of the helix formed by residues 292 - 313 (chain F) in PDB entry 1R4N


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 292 (chain F).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     16E  GLN*     3.3    26.9    -      -       +      +
     19E  LEU*     3.6    25.1    -      -       +      -
     20E  TRP*     4.0    16.4    -      -       +      -
     52E  PRO*     5.7     1.8    -      -       +      -
     89F  ASN*     4.5     4.5    -      -       -      +
     90F  ARG*     4.1     9.0    -      -       -      +
    182F  THR*     5.8     0.3    -      -       -      +
    184F  GLY      4.9     1.8    +      -       -      +
    185F  PHE*     4.4    11.7    -      -       +      -
    291F  ALA*     1.3    82.7    -      -       -      +
    293F  ALA*     1.3    66.5    +      -       -      +
    294F  SER*     3.4    27.4    -      -       -      +
    295F  THR*     3.9    12.7    +      -       -      +
    296F  ASN*     3.7    13.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 293 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48E  ASN*     3.8    33.9    -      -       -      +
     51E  LEU*     4.3    16.2    -      -       +      -
     52E  PRO*     4.7     5.6    -      -       +      +
     62F  GLU*     5.0     3.3    -      -       -      +
     89F  ASN      4.4     4.7    +      -       -      +
     90F  ARG*     3.7    23.4    -      -       +      +
    292F  VAL*     1.3    71.2    -      -       -      +
    294F  SER*     1.3    70.4    +      -       -      +
    296F  ASN*     2.9    20.2    +      -       -      +
    297F  ALA*     2.9     9.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 294 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48E  ASN*     4.3    10.8    +      -       -      +
     52E  PRO*     5.5     0.9    -      -       -      +
    499E  GLY*     3.7    15.9    -      -       -      -
    502E  ALA*     5.1     0.3    -      -       -      +
    503E  GLN*     3.3    43.4    +      -       -      +
    506E  ILE*     4.3     8.7    -      -       -      +
    185F  PHE*     4.9     0.4    -      -       -      -
    292F  VAL*     3.4    18.0    -      -       -      +
    293F  ALA*     1.3    75.5    -      -       -      +
    295F  THR*     1.3    65.2    +      -       -      +
    297F  ALA*     3.1    17.7    -      -       -      +
    298F  VAL*     3.3    11.2    +      -       -      +
    326F  ASP*     4.8     1.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with THR 295 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    182F  THR*     3.3    22.7    -      -       -      +
    184F  GLY      2.9    27.5    +      -       -      +
    185F  PHE*     3.4    23.1    +      -       -      +
    186F  LYS      3.8    18.8    -      -       -      +
    187F  GLY*     4.6     0.2    -      -       -      -
    292F  VAL*     3.9     9.0    +      -       -      +
    293F  ALA      2.9     3.2    +      -       -      -
    294F  SER*     1.3    76.1    -      -       -      +
    296F  ASN*     1.3    67.6    +      -       -      +
    298F  VAL*     2.8    20.2    +      -       -      +
    299F  ILE*     3.1    17.6    +      -       +      +
    324F  PHE*     4.9     5.4    -      -       +      -
    326F  ASP*     4.4     5.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 296 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     58F  GLY*     3.6    29.8    -      -       -      +
     59F  LEU*     3.8    14.7    -      -       -      +
     62F  GLU*     4.6     4.7    -      -       -      +
     90F  ARG*     3.6    33.4    -      -       -      +
    182F  THR*     3.0    34.6    +      -       -      +
    291F  ALA*     4.9     1.4    -      -       -      +
    292F  VAL      3.7     9.0    +      -       -      -
    293F  ALA*     2.9     9.8    +      -       -      +
    295F  THR*     1.3    76.5    -      -       -      +
    297F  ALA*     1.3    66.7    +      -       -      +
    299F  ILE      4.8     0.2    -      -       -      +
    300F  ALA*     2.9    29.1    +      -       -      +
    176K  GLY*     3.9     5.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 297 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     44E  GLU*     5.9     0.7    -      -       -      +
     48E  ASN*     3.6    25.8    -      -       -      +
    495E  ALA*     4.6     6.5    -      -       +      +
    499E  GLY*     3.8    13.7    -      -       -      +
     62F  GLU*     3.7    24.7    +      -       -      +
    293F  ALA      2.9     6.7    +      -       -      +
    294F  SER      3.1    12.6    -      -       -      +
    296F  ASN*     1.3    76.2    -      -       -      +
    298F  VAL*     1.3    53.5    +      -       -      +
    300F  ALA*     3.8     1.6    -      -       -      +
    301F  ALA*     2.8    37.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 298 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    496E  PHE*     3.4    40.7    -      -       +      +
    499E  GLY      3.8     1.6    -      -       -      -
    500E  ALA*     3.6    26.2    -      -       +      +
    294F  SER      3.5    14.6    -      -       -      +
    295F  THR*     2.8     8.4    +      -       -      +
    297F  ALA*     1.3    73.0    -      -       -      +
    299F  ILE*     1.3    71.0    +      -       +      +
    301F  ALA*     3.0     6.4    +      -       -      +
    302F  VAL*     3.0    24.5    +      -       +      +
    324F  PHE*     3.6    42.4    -      -       +      -
    326F  ASP*     5.2     0.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 299 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     59F  LEU*     3.9    14.4    -      -       +      -
    180F  GLY*     3.9     8.3    -      -       -      -
    181F  GLY      3.5    24.2    -      -       -      +
    182F  THR*     4.2     4.5    -      -       -      +
    187F  GLY*     3.6    13.0    -      -       -      +
    188F  ASN*     3.3    43.7    -      -       -      +
    189F  ALA*     4.1     6.7    -      -       +      +
    295F  THR*     3.1    10.8    +      -       +      +
    296F  ASN      4.0     4.0    -      -       -      +
    298F  VAL*     1.3    81.2    -      -       +      +
    300F  ALA*     1.3    56.5    +      -       -      +
    302F  VAL*     2.7    30.3    +      -       +      +
    303F  CYS*     3.0    19.7    +      -       -      -
    322F  LEU*     5.3     3.8    -      -       +      +
    324F  PHE*     4.3    13.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 300 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     59F  LEU*     3.9    16.8    -      -       +      +
     62F  GLU*     3.5    30.3    -      -       +      -
     63F  LEU*     3.7    18.2    -      -       +      +
     66F  ASN*     3.6     5.3    +      -       -      +
    296F  ASN      2.9    21.2    +      -       -      +
    299F  ILE*     1.3    75.0    -      -       -      +
    301F  ALA*     1.3    57.5    +      -       -      +
    302F  VAL      3.1     0.2    +      -       -      -
    303F  CYS*     3.3     2.8    +      -       -      -
    304F  ALA*     2.8    31.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 301 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    492E  THR      3.4    12.7    -      -       -      +
    495E  ALA*     3.5     9.6    -      -       +      -
    496E  PHE*     3.3    33.0    -      -       +      +
    522E  TYR*     5.2     0.9    +      -       -      -
     66F  ASN*     3.5    11.6    -      -       -      +
    297F  ALA      2.8    19.9    +      -       -      +
    298F  VAL      3.0     5.4    +      -       -      +
    300F  ALA*     1.3    75.3    -      -       -      +
    302F  VAL*     1.3    61.4    +      -       -      +
    304F  ALA*     3.6     3.4    -      -       -      +
    305F  THR*     3.2    23.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 302 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    496E  PHE*     3.8    24.5    -      -       +      -
    522E  TYR*     4.3     2.7    -      -       -      +
    527E  GLN*     3.0    31.6    -      -       +      +
    189F  ALA*     4.0    20.0    -      -       +      -
    298F  VAL*     3.0    19.5    +      -       +      +
    299F  ILE*     2.7    13.8    +      -       +      +
    301F  ALA*     1.3    74.2    -      -       -      +
    303F  CYS*     1.3    68.6    +      -       -      +
    304F  ALA      3.0     0.9    -      -       -      -
    305F  THR*     2.9    17.0    +      -       -      -
    306F  GLU*     3.1    15.0    +      -       +      +
    318F  LEU*     4.9     4.5    -      -       +      -
    322F  LEU*     4.2    16.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with CYS 303 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     59F  LEU*     5.8     0.4    -      -       -      -
     63F  LEU*     4.2    14.1    -      -       +      -
    142F  VAL*     4.3     4.0    -      -       +      -
    143F  CYS      5.4     1.3    -      -       -      -
    178F  ILE*     3.3    27.9    -      -       +      +
    179F  ASP      3.9     8.5    -      -       -      -
    180F  GLY*     4.1     5.4    -      -       -      -
    189F  ALA*     3.8    21.3    -      -       -      -
    299F  ILE*     3.0    24.0    +      -       -      -
    300F  ALA*     3.8     5.8    -      -       -      +
    302F  VAL*     1.3    75.0    -      -       -      +
    304F  ALA*     1.3    67.5    +      -       -      +
    306F  GLU*     3.1     7.6    +      -       -      +
    307F  VAL*     3.0    23.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 304 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    492E  THR*     3.5    12.8    -      -       +      -
     63F  LEU*     4.1     8.9    -      -       +      +
     66F  ASN*     3.4    33.9    -      -       +      +
     67F  LEU*     4.7     8.6    -      -       +      +
     70F  SER*     5.6     0.8    +      -       -      -
    300F  ALA      2.8    19.5    +      -       -      +
    301F  ALA      3.6     4.3    -      -       -      +
    303F  CYS*     1.3    79.1    -      -       -      +
    305F  THR*     1.3    65.2    +      -       -      +
    307F  VAL*     2.9    16.2    +      -       -      +
    308F  PHE*     3.1    10.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 305 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    158E  LEU*     5.1    13.5    -      -       +      -
    492E  THR*     2.8    38.4    +      -       -      +
    493E  ILE*     4.8     4.0    -      -       +      +
    522E  TYR*     5.0     1.0    +      -       -      -
    524E  GLY*     5.1     1.3    -      -       -      +
    527E  GLN*     3.9    15.9    +      -       -      +
    301F  ALA      3.2     6.3    +      -       -      -
    302F  VAL      2.9     9.0    +      -       -      -
    304F  ALA*     1.3    77.5    -      -       -      +
    306F  GLU*     1.3    53.1    +      -       -      +
    308F  PHE*     2.8    14.0    +      -       +      +
    309F  LYS*     2.7    60.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 306 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    527E  GLN*     3.3    28.8    +      -       -      +
    178F  ILE*     4.3     6.5    -      -       +      -
    191F  VAL*     3.2    34.1    -      -       +      -
    302F  VAL*     3.1    10.8    +      -       +      +
    303F  CYS*     3.1    13.6    +      -       -      +
    305F  THR*     1.3    76.7    -      -       -      +
    307F  VAL*     1.3    52.6    +      -       -      +
    309F  LYS*     2.9    28.5    +      -       -      +
    310F  ILE*     2.6    41.6    +      -       +      +
    317F  PRO*     3.4     3.1    -      -       +      +
    318F  LEU*     2.6    34.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 307 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     51F  VAL*     4.7     3.6    -      -       +      -
     67F  LEU*     3.7    16.4    -      -       +      -
     72F  PHE*     3.7    19.7    -      -       +      -
    140F  ILE*     3.7    34.3    -      -       +      -
    142F  VAL*     3.5    31.9    -      -       +      -
    178F  ILE*     4.2     5.4    -      -       +      +
    303F  CYS      3.0    17.3    +      -       -      +
    304F  ALA*     2.9     9.6    +      -       -      +
    306F  GLU*     1.3    73.6    -      -       -      +
    308F  PHE*     1.3    56.7    +      -       -      +
    310F  ILE*     3.0     6.5    +      -       -      +
    311F  ALA*     2.7    33.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 308 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    492E  THR*     5.6     1.8    -      -       +      +
     20F  VAL*     3.6    19.1    -      -       +      -
     23F  PHE*     4.5    16.8    -      +       +      -
     24F  LEU*     3.6    22.9    -      -       +      -
     45F  LEU*     4.1     3.4    -      -       +      -
     70F  SER*     3.6    36.8    -      -       -      +
     72F  PHE*     4.0    23.1    -      +       +      -
    304F  ALA      3.1     6.5    +      -       -      +
    305F  THR*     2.8    16.5    +      -       +      +
    307F  VAL*     1.3    79.9    -      -       -      +
    309F  LYS*     1.3    60.0    +      -       +      +
    312F  THR*     2.6    63.6    +      -       +      +
    314F  ALA*     4.3    11.4    -      -       +      -
    315F  TYR*     5.7     2.5    -      +       -      -
----------------------------------------------------------
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Residues in contact with LYS 309 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    158E  LEU*     5.1     2.0    -      -       -      -
    524E  GLY      2.9    28.5    +      -       -      -
    525E  MET*     3.2    14.6    +      -       -      +
    527E  GLN*     3.6    10.3    -      -       -      +
    305F  THR*     2.7    36.2    +      -       +      +
    306F  GLU*     3.1    34.8    +      -       -      +
    308F  PHE*     1.3    74.5    -      -       +      +
    310F  ILE*     1.3    59.4    +      -       -      +
    312F  THR*     4.1     3.1    -      -       -      -
    313F  SER*     2.4    37.2    +      -       -      +
    314F  ALA*     4.7     2.7    -      -       -      +
    315F  TYR*     3.9    41.1    -      -       +      +
    316F  ILE      3.7    14.7    +      -       -      +
    317F  PRO*     4.7     4.7    -      -       +      -
    318F  LEU      4.6     0.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 310 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    140F  ILE*     3.9    13.5    -      -       +      -
    176F  PRO*     3.8    31.0    -      -       +      -
    178F  ILE*     3.6    32.1    -      -       +      -
    191F  VAL*     4.3    18.2    -      -       +      -
    193F  LEU*     4.9     4.3    -      -       +      -
    306F  GLU*     2.6    21.7    +      -       -      +
    307F  VAL      3.5     4.3    -      -       -      +
    309F  LYS*     1.3    75.0    -      -       -      +
    311F  ALA*     1.3    61.9    +      -       -      +
    313F  SER*     3.7    12.2    +      -       -      +
    317F  PRO*     4.0    24.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 311 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45F  LEU*     4.0    11.0    -      -       +      +
     49F  CYS*     4.1     8.9    -      -       -      -
     72F  PHE*     3.7    23.1    -      -       +      -
    140F  ILE*     3.6    19.1    -      -       +      -
    307F  VAL      2.7    19.5    +      -       -      +
    308F  PHE      4.1     0.9    -      -       -      +
    310F  ILE*     1.3    76.9    -      -       -      +
    312F  THR*     1.3    60.5    +      -       -      +
    313F  SER*     4.6     1.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with THR 312 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     24F  LEU*     3.4    31.4    -      -       +      +
     35F  PHE*     4.1     9.5    -      -       -      -
     41F  SER      6.1     0.2    -      -       -      +
     45F  LEU*     3.9    21.5    -      -       +      -
    308F  PHE*     2.6    43.6    +      -       +      +
    309F  LYS      3.7     0.2    +      -       -      -
    311F  ALA*     1.3    77.2    -      -       -      +
    313F  SER*     1.3    73.1    +      -       -      +
    314F  ALA*     3.4    18.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 313 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     32F  HIS*     3.5    28.7    -      -       -      +
     34F  ASP*     4.7    13.1    -      -       -      +
     35F  PHE*     3.1    23.0    -      -       -      +
    309F  LYS      2.4    27.2    +      -       -      -
    310F  ILE*     3.7    11.4    +      -       -      +
    311F  ALA      4.6     1.2    +      -       -      -
    312F  THR*     1.3    72.5    -      -       -      +
    314F  ALA*     1.3    57.2    +      -       -      +
    315F  TYR      3.2    10.3    -      -       -      +
    317F  PRO*     6.3     0.4    -      -       -      -
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


   I  Hydrophilic      - N and O that can donate and accept hydrogen bonds
                         (e.g., oxygen of hydroxyl group of Ser. or Thr)
  II  Acceptor         - N or O that can only accept a hydrogen bond
 III  Donor            - N that can only donate a hydrogen bond
  IV  Hydrophobic      - Cl, Br, I and all C atoms that are not in
                         aromatic rings and do not have a covalent bond to
                         a N or O atom
   V  Aromatic         - C in aromatic rings irrespective of any other 
                         bonds formed by the atom
  VI  Neutral          - C atoms that have a covalent bond to at least one
                         atom of class I or two or more atoms from class II
                         or III; atoms; S, F, P, and metal atoms in all cases
 VII  Neutral-donor    - C atoms that have a covalent bond with only one
                         atom of class III
VIII  Neutral-acceptor - C atoms that have a covalent bond with only 
                         one atom of class II
For each pair of contacts the state of legitimacy is shown below:

Legend:
+, legitimate
-, illegitimate
------------------------------------------------------------
  Atomic class           I  II  III   IV   V   VI  VII  VIII
------------------------------------------------------------
   I  (Hydrophilic)      +   +    +    -   +   +    +    +
  II  (Acceptor)         +   -    +    -   +   +    +    -
 III  (Donor)            +   +    -    -   +   +    -    +
  IV  (Hydrophobic)      -   -    -    +   +   +    +    +
   V  (Aromatic)         +   +    +    +   +   +    +    +
  VI  (Neutral)          +   +    +    +   +   +    +    +
 VII  (Neutral-donor)    +   +    -    +   +   +    -    +
VIII  (Neutral-acceptor) +   -    +    +   +   +    +    -
------------------------------------------------------------
Warning!
Atom classes for heterogroups are automatically assigned based on the atomic coordinates. However, in three cases (see below) the automatic assignment is currently ambiguous. In these cases, the user is advised to manually analyse the full list of contacts using LPC software.
1. Carbon atoms belonging to a 4-, 5- or 6-member ring are 
   considered "aromatic" (Class V) if the ring is approximately
   planar, and "hydrophobic" (Class IV) or "neutral" (Classes
   VI, VII, VIII) if the ring is non-planar.
2. The oxygen atom of a carbonyl or hydroxy group is considered
   "hydroxy" (Class I) if the CO bond is longer than 1.29 Å, and
   "carbonyl" (Class II) if shorter.
3. All nitrogen atoms are considered "hydrophilic" (Class I).

Please E-mail any questions and/or suggestions concerning this page to Vladimir.Sobolev@weizmann.ac.il