Contacts of the helix formed by residues 279 - 301 (chain D) in PDB entry 4UQJ


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 LYS 279 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     24D  GLN*     3.4    21.1    +      -       -      +
     25D  GLU*     5.0     2.0    -      -       -      +
    229D  ASP*     3.2    16.8    -      -       +      +
    278D  ILE*     1.3    77.7    -      -       -      +
    280D  TYR*     1.3    61.5    +      -       +      +
    281D  THR*     3.8    16.8    -      -       -      +
    282D  SER*     2.9     5.8    +      -       -      +
    283D  ALA*     2.9    24.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 280 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99D  PRO      5.4     2.0    -      -       -      -
    114D  ARG*     5.4     4.0    -      -       +      -
    141D  ARG*     4.9    13.5    -      -       -      -
    197D  GLU*     6.1     1.4    -      -       -      -
    198D  ARG*     6.0     7.0    -      -       +      -
    224D  ASN*     4.7    14.4    -      -       +      +
    225D  LEU*     3.7    41.1    -      -       +      +
    226D  GLY*     3.6    18.2    -      -       -      -
    229D  ASP*     2.9    23.3    +      -       +      +
    246D  GLN*     5.9     0.2    -      -       -      +
    247D  ILE*     3.5    25.1    -      -       +      +
    248D  VAL*     4.2    13.5    -      -       +      -
    278D  ILE      3.5     1.2    +      -       -      -
    279D  LYS*     1.3    72.3    -      -       +      +
    281D  THR*     1.3    80.9    +      -       +      +
    283D  ALA*     3.7     0.9    -      -       -      +
    284D  LEU*     3.0    46.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 281 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     25D  GLU*     2.8    30.4    +      -       -      +
     76D  PHE*     5.2     7.6    -      -       +      -
     99D  PRO*     3.9    11.0    -      -       +      +
    279D  LYS*     3.8    10.7    -      -       +      +
    280D  TYR*     1.3   111.7    -      -       +      +
    282D  SER*     1.3    60.0    +      -       -      +
    284D  LEU*     3.5     8.0    +      -       -      +
    285D  THR*     3.0    25.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 282 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     24D  GLN*     3.3    39.0    +      -       -      +
     25D  GLU*     3.3    23.2    +      -       -      +
     28D  ALA*     3.4     8.5    -      -       -      +
    278D  ILE*     3.6    19.1    -      -       -      -
    279D  LYS*     2.9     8.7    +      -       -      +
    281D  THR*     1.3    77.5    +      -       -      +
    283D  ALA*     1.3    64.5    +      -       -      +
    285D  THR*     3.1    17.9    +      -       -      -
    286D  TYR*     3.1    10.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 283 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    247D  ILE*     6.0     0.2    -      -       +      -
    248D  VAL*     3.6    30.5    -      -       +      -
    278D  ILE*     3.5    17.9    -      -       +      +
    279D  LYS      2.9    12.5    +      -       -      +
    280D  TYR      3.7     3.4    -      -       -      +
    282D  SER*     1.3    75.6    -      -       -      +
    284D  LEU*     1.3    60.3    +      -       +      +
    286D  TYR*     3.4     4.5    +      -       -      +
    287D  ASP*     3.1    32.5    +      -       -      +
    341D  LEU*     4.1    20.3    -      -       +      +
    342D  SER*     5.7     0.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 284 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99D  PRO*     3.7    28.9    -      -       +      +
    113D  MET*     3.3    30.3    -      -       +      +
    114D  ARG*     3.6    32.5    -      -       +      +
    115D  PRO*     4.8     4.0    -      -       +      -
    225D  LEU*     5.3     0.2    -      -       +      -
    247D  ILE*     5.4     3.8    -      -       +      -
    280D  TYR*     3.0    35.2    +      -       +      +
    281D  THR*     3.8     0.9    -      -       -      +
    282D  SER      3.2     0.2    -      -       -      -
    283D  ALA*     1.3    74.7    -      -       +      +
    285D  THR*     1.3    55.8    +      -       -      +
    287D  ASP*     3.2     5.5    +      -       +      +
    288D  ALA*     2.8    34.2    +      -       -      +
    342D  SER*     3.6    31.9    -      -       -      +
    353D  ARG*     4.0     1.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 285 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18D  PHE*     4.4     0.7    -      -       +      -
     25D  GLU*     3.3    27.4    +      -       -      +
     28D  ALA*     4.6     0.2    -      -       -      -
     29D  PHE*     3.6    22.0    -      -       +      +
     74D  PHE*     3.4    29.0    -      -       +      -
     76D  PHE*     3.7     9.0    -      -       -      -
     99D  PRO*     3.7    11.2    -      -       -      +
    281D  THR      3.0    14.6    +      -       -      -
    282D  SER*     3.1    12.2    +      -       -      -
    284D  LEU*     1.3    79.4    -      -       -      +
    286D  TYR*     1.3    61.8    -      -       -      +
    288D  ALA*     3.1    15.4    +      -       -      +
    289D  VAL*     3.3    10.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 286 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     28D  ALA*     3.9    18.8    +      -       +      +
     31D  VAL*     4.2     7.6    -      -       +      -
     32D  GLY*     3.7    25.4    -      -       -      -
     35D  GLN*     3.3    27.0    -      -       +      +
     36D  PHE*     3.5    31.7    -      +       -      -
    254D  LEU*     5.8     4.2    -      -       +      +
    258D  PHE*     3.4    37.8    -      +       +      -
    282D  SER      3.1     8.2    +      -       -      +
    283D  ALA*     3.6     7.9    -      -       -      +
    284D  LEU      3.3     0.2    -      -       -      -
    285D  THR*     1.3    78.5    -      -       -      +
    287D  ASP*     1.3    78.5    +      -       -      +
    288D  ALA      3.3     0.5    +      -       -      -
    289D  VAL*     3.3    15.8    +      -       -      +
    290D  GLN*     3.5     8.2    +      -       -      -
    340D  GLY*     6.0     0.4    -      -       -      -
    341D  LEU*     3.8    20.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 287 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    113D  MET*     4.3     4.0    -      -       -      -
    283D  ALA      3.1    19.2    +      -       -      +
    284D  LEU*     3.7     7.4    -      -       +      +
    286D  TYR*     1.3    87.5    -      -       -      +
    288D  ALA*     1.3    64.1    +      -       -      +
    290D  GLN*     3.4     9.2    +      -       -      +
    291D  VAL*     3.1    28.4    +      -       -      +
    340D  GLY*     3.5    11.1    -      -       -      -
    341D  LEU*     3.0    20.6    +      -       -      +
    342D  SER*     3.0    38.7    +      -       -      +
    345D  ILE*     3.8    14.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 288 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     74D  PHE*     3.4    32.8    -      -       +      -
     97D  ILE*     3.9     5.3    -      -       +      +
    113D  MET*     3.7    19.5    -      -       +      -
    284D  LEU      2.8    13.6    +      -       -      +
    285D  THR      3.1    11.0    +      -       -      +
    287D  ASP*     1.3    75.3    -      -       -      +
    289D  VAL*     1.3    66.0    +      -       +      +
    291D  VAL*     3.1     4.4    +      -       -      +
    292D  MET*     3.0    29.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 289 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29D  PHE*     3.8    43.7    -      -       +      +
     32D  GLY*     3.4    33.4    -      -       -      +
     33D  MET*     3.9    14.8    -      -       -      +
     36D  PHE*     4.1     5.6    -      -       +      -
     43D  LEU*     4.9     4.8    -      -       +      +
    285D  THR      3.3    13.4    +      -       -      +
    286D  TYR      3.6     7.4    -      -       -      +
    287D  ASP      3.3     0.2    -      -       -      -
    288D  ALA*     1.3    77.1    -      -       +      +
    290D  GLN*     1.3    56.8    +      -       -      +
    292D  MET*     3.3    11.0    +      -       -      +
    293D  THR*     3.0    39.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 290 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     36D  PHE*     3.5    49.5    -      -       +      -
    286D  TYR*     3.5     5.4    +      -       -      +
    287D  ASP*     3.4    15.6    +      -       -      +
    288D  ALA      3.2     0.4    -      -       -      -
    289D  VAL*     1.3    79.0    -      -       -      +
    291D  VAL*     1.3    57.5    +      -       -      +
    293D  THR*     3.4     2.3    +      -       -      -
    294D  GLU*     3.0    28.5    +      -       +      +
    338D  VAL*     3.3    36.3    -      -       +      +
    339D  GLU      3.3    26.4    +      -       -      +
    340D  GLY*     4.0     9.5    -      -       -      -
    345D  ILE*     5.2     0.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 291 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     97D  ILE*     5.8     2.0    -      -       +      -
    111D  ILE*     5.0     3.4    -      -       +      -
    113D  MET*     4.3    10.3    -      -       +      -
    287D  ASP      3.1    17.4    +      -       -      +
    288D  ALA*     3.1     8.2    +      -       -      +
    290D  GLN*     1.3    77.8    -      -       -      +
    292D  MET*     1.3    58.7    +      -       +      +
    295D  ALA*     3.0    27.2    +      -       -      +
    333D  LEU*     4.1    18.4    -      -       +      +
    336D  VAL*     3.5    30.1    -      -       +      +
    338D  VAL*     4.9     2.7    -      -       +      -
    345D  ILE*     4.2    28.7    -      -       +      -
    347D  PHE*     4.1    18.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 292 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     14D  ILE*     3.7    43.7    -      -       +      -
     29D  PHE*     5.4     3.8    -      -       -      -
     43D  LEU*     4.5    12.3    -      -       +      +
     72D  ALA*     4.1    19.7    -      -       +      -
     74D  PHE*     4.1    26.2    -      -       +      -
     97D  ILE*     4.3    18.2    -      -       +      -
    288D  ALA      3.0    20.8    +      -       -      +
    289D  VAL*     3.7     8.5    -      -       -      +
    291D  VAL*     1.3    74.4    -      -       +      +
    293D  THR*     1.3    63.7    +      -       -      +
    295D  ALA*     3.5     1.4    +      -       -      +
    296D  PHE*     3.1    24.8    +      -       -      +
    333D  LEU*     3.8    19.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with THR 293 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     36D  PHE*     3.7    38.0    +      -       +      +
     38D  THR*     5.4     4.3    -      -       +      -
     41D  PHE*     3.5    24.7    -      -       +      -
     43D  LEU*     4.2    14.0    -      -       -      +
    289D  VAL*     3.0    19.8    +      -       -      +
    290D  GLN      3.7     5.4    -      -       -      -
    292D  MET*     1.3    75.3    -      -       -      +
    294D  GLU*     1.3    62.9    +      -       -      +
    296D  PHE      3.3     0.9    +      -       -      -
    297D  ARG*     3.0    31.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 294 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    290D  GLN*     3.0    17.7    +      -       +      +
    293D  THR*     1.3    78.0    -      -       -      +
    295D  ALA*     1.3    56.4    +      -       -      +
    297D  ARG*     3.5     7.7    +      -       -      +
    298D  ASN*     3.1    59.6    +      -       -      +
    336D  VAL*     3.8    26.7    -      -       +      -
    337D  GLN      5.0     1.1    -      -       -      +
    338D  VAL*     3.9    20.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 295 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    291D  VAL      3.0    19.4    +      -       -      +
    292D  MET      3.7     2.9    -      -       -      +
    294D  GLU*     1.3    74.4    -      -       -      +
    296D  PHE*     1.3    64.4    +      -       -      +
    297D  ARG      3.1     1.9    +      -       -      -
    298D  ASN*     3.3    11.2    +      -       -      +
    299D  LEU*     3.4    10.4    +      -       -      +
    329D  ILE*     6.4     0.2    -      -       +      -
    332D  ALA*     3.7    19.2    -      -       +      +
    333D  LEU*     3.4    37.5    -      -       +      +
    336D  VAL*     3.6    14.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 296 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     12D  ILE*     3.6    33.6    -      -       +      +
     41D  PHE*     4.1    11.9    -      -       +      -
     43D  LEU*     5.6     2.0    -      -       +      -
    292D  MET      3.1    15.3    +      -       -      +
    293D  THR      4.0     2.9    -      -       -      +
    295D  ALA*     1.3    78.5    -      -       -      +
    297D  ARG*     1.3    60.1    +      -       -      +
    298D  ASN      3.5     0.2    -      -       -      -
    299D  LEU*     3.6    14.4    +      -       -      +
    300D  ARG*     3.5    18.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 297 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41D  PHE*     3.7    21.7    -      -       +      -
    293D  THR*     3.0    19.5    +      -       +      +
    294D  GLU*     3.7    13.2    -      -       -      +
    296D  PHE*     1.3    75.4    -      -       -      +
    298D  ASN*     1.3    63.3    +      -       -      +
    299D  LEU      3.1     4.7    -      -       -      -
    300D  ARG*     3.3     5.2    +      -       -      +
    301D  LYS*     3.2    24.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 298 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    294D  GLU*     3.1    47.5    +      -       -      +
    295D  ALA*     3.3     6.9    +      -       -      +
    297D  ARG*     1.3    77.8    -      -       -      +
    299D  LEU*     1.3    63.6    +      -       +      +
    301D  LYS*     4.2     7.4    -      -       -      +
    302D  GLN*     3.0    25.5    +      -       -      +
    332D  ALA*     5.1     5.8    +      -       +      +
    335D  GLN*     5.2     5.7    +      -       -      +
    336D  VAL*     4.8    12.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 299 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    295D  ALA      3.4     8.0    +      -       -      +
    296D  PHE*     3.8    15.0    -      -       +      +
    297D  ARG      3.1     0.4    -      -       -      -
    298D  ASN*     1.3    85.3    -      -       +      +
    300D  ARG*     1.3    61.2    +      -       -      +
    301D  LYS      3.4     0.4    -      -       -      -
    302D  GLN*     3.5     2.4    +      -       -      -
    303D  ARG      3.4     2.8    +      -       -      -
    304D  ILE*     3.1    60.5    +      -       +      +
    306D  ILE*     3.9    28.0    -      -       +      -
    328D  GLU*     4.3     7.4    -      -       -      +
    329D  ILE*     4.2    17.0    -      -       +      +
    332D  ALA*     3.3    36.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 300 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     10D  ASN*     5.8     3.6    -      -       -      +
     40D  GLU*     6.5     0.9    -      -       +      -
     41D  PHE*     5.4     8.5    -      -       +      -
    296D  PHE      3.5    10.1    +      -       -      +
    297D  ARG*     3.3    10.8    +      -       -      +
    299D  LEU*     1.3    78.9    -      -       -      +
    301D  LYS*     1.3    61.2    +      -       -      +
    302D  GLN      3.1     1.6    -      -       -      -
    303D  ARG*     3.2    13.0    +      -       -      +
    304D  ILE      5.2     0.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 301 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    297D  ARG      3.2    13.3    +      -       -      +
    298D  ASN*     4.3     6.1    -      -       -      +
    300D  ARG*     1.3    78.6    -      -       -      +
    302D  GLN*     1.3    57.6    +      -       -      +
    303D  ARG*     3.3     2.2    +      -       -      +
----------------------------------------------------------
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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