Contacts of the helix formed by residues 282 - 310 (chain D) in PDB entry 5BJ3


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 GLN 282 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     83D  ARG*     3.3    45.8    +      -       -      +
    278D  ALA      5.1     0.4    -      -       -      -
    279D  LEU      3.6    18.3    +      -       -      +
    280D  THR*     3.0    10.3    +      -       -      +
    281D  ASN*     1.3    75.2    -      -       -      +
    283D  GLU*     1.3    56.3    +      -       -      +
    285D  SER*     4.5     4.9    -      -       -      -
    286D  ARG*     2.8    49.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 283 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    281D  ASN*     3.2     9.5    +      -       -      +
    282D  GLN*     1.3    80.7    -      -       -      +
    284D  ALA*     1.3    62.9    +      -       -      +
    286D  ARG*     3.6    20.7    +      -       -      +
    287D  ALA*     3.2    22.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 284 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48D  HIS*     3.6    30.2    +      -       +      -
    281D  ASN*     3.2    28.6    -      -       -      +
    283D  GLU*     1.3    80.1    -      -       -      +
    285D  SER*     1.3    61.6    +      -       -      +
    287D  ALA*     3.5     8.0    +      -       -      +
    288D  PHE*     3.3    17.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 285 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48D  HIS*     2.9    26.7    -      -       -      -
    236D  PHE*     3.9    19.0    -      -       -      -
    278D  ALA*     2.7    30.4    +      -       -      +
    281D  ASN      3.1    10.3    +      -       -      -
    282D  GLN*     4.1     4.7    -      -       -      -
    284D  ALA*     1.3    72.3    -      -       -      +
    286D  ARG*     1.3    67.6    +      -       -      +
    288D  PHE*     3.1     6.9    +      -       -      +
    289D  VAL*     2.9    28.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 286 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    282D  GLN*     2.8    34.8    +      -       -      +
    283D  GLU*     3.6    27.0    +      -       -      +
    285D  SER*     1.3    75.1    -      -       -      +
    287D  ALA*     1.3    59.1    +      -       -      +
    289D  VAL*     3.2     7.9    +      -       -      +
    290D  GLU*     2.8    55.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 287 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    283D  GLU      3.2    10.5    +      -       -      +
    284D  ALA*     3.6    12.1    -      -       -      +
    286D  ARG*     1.3    80.8    -      -       -      +
    288D  PHE*     1.3    61.3    +      -       -      +
    290D  GLU*     3.6     6.3    +      -       -      +
    291D  MET*     3.1    24.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 288 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41D  PRO*     5.9     0.9    -      -       +      -
     43D  PHE*     3.9    24.2    -      +       +      -
     44D  ASP      3.8    14.1    -      -       -      -
     46D  PRO*     4.0    30.7    -      -       +      -
    234D  LYS      5.6     0.4    -      -       -      -
    235D  ALA      3.5    24.0    -      -       -      -
    236D  PHE*     3.8    20.9    -      +       +      -
    237D  ALA*     3.9    13.5    -      -       +      -
    284D  ALA      3.3    10.2    +      -       -      +
    285D  SER*     3.1     9.5    +      -       -      +
    287D  ALA*     1.3    75.2    -      -       -      +
    289D  VAL*     1.3    68.8    +      -       -      +
    291D  MET*     3.2    32.4    +      -       +      +
    292D  ALA*     3.0    32.6    +      -       +      +
----------------------------------------------------------
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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
----------------------------------------------------------
    208D  HIS*     3.8    36.3    -      -       +      +
    209D  LEU*     5.8     2.0    -      -       +      +
    235D  ALA      4.1    11.9    -      -       -      +
    236D  PHE*     3.9    24.0    -      -       +      -
    285D  SER      2.9    18.1    +      -       -      +
    286D  ARG*     3.2    10.3    +      -       -      +
    288D  PHE*     1.3    78.5    -      -       -      +
    290D  GLU*     1.3    58.7    +      -       -      +
    292D  ALA*     3.9     3.7    -      -       -      +
    293D  ARG*     2.9    54.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 290 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    286D  ARG*     2.8    50.3    +      -       +      +
    287D  ALA*     4.0     6.3    -      -       -      +
    289D  VAL*     1.3    79.3    -      -       -      +
    291D  MET*     1.3    63.7    -      -       -      +
    293D  ARG*     2.8    45.2    +      -       -      +
    294D  GLU*     3.1    26.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 291 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     43D  PHE*     3.7    31.6    -      -       +      -
    287D  ALA      3.1    18.4    +      -       -      +
    288D  PHE*     3.2    38.6    +      -       +      +
    290D  GLU*     1.3    77.6    -      -       -      +
    292D  ALA*     1.3    68.1    +      -       -      +
    294D  GLU*     3.5     6.6    +      -       -      +
    295D  ALA*     3.1    22.1    +      -       +      +
    298D  ARG*     5.5     0.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 292 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     43D  PHE*     4.0    26.0    -      -       +      -
    209D  LEU*     6.0     2.9    -      -       +      -
    235D  ALA      5.7     0.9    -      -       -      +
    288D  PHE*     3.0    29.4    +      -       +      +
    289D  VAL*     3.9     4.5    -      -       -      +
    291D  MET*     1.3    76.4    -      -       +      +
    293D  ARG*     1.3    59.2    -      -       -      +
    295D  ALA*     3.0     3.6    +      -       -      +
    296D  TYR*     2.8    52.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 293 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    208D  HIS*     3.6    22.9    +      -       -      +
    209D  LEU*     5.3     3.1    -      -       +      +
    210D  LEU*     3.4    27.2    +      -       -      +
    211D  TYR*     3.5    16.0    -      -       +      -
    289D  VAL*     2.9    34.1    +      -       -      +
    290D  GLU*     2.8    44.2    +      -       -      +
    292D  ALA*     1.3    75.0    -      -       -      +
    294D  GLU*     1.3    57.7    +      -       -      +
    296D  TYR*     3.4     9.0    +      -       -      -
    297D  ARG*     2.9    41.7    +      -       -      +
----------------------------------------------------------
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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  GLU      3.1    18.3    +      -       -      +
    291D  MET*     3.8     6.5    -      -       -      +
    293D  ARG*     1.3    75.3    -      -       -      +
    295D  ALA*     1.3    65.2    +      -       -      +
    297D  ARG*     3.5    13.7    +      -       +      +
    298D  ARG*     2.8    61.5    +      -       +      +
----------------------------------------------------------
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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
----------------------------------------------------------
     43D  PHE*     3.8    24.9    -      -       +      -
    291D  MET*     3.1    14.4    +      -       +      +
    292D  ALA      3.0     9.0    +      -       -      +
    294D  GLU*     1.3    76.6    -      -       -      +
    296D  TYR*     1.3    62.1    +      -       -      +
    298D  ARG*     3.4    18.7    +      -       -      +
    299D  ARG*     3.2    36.7    +      -       -      +
    368D  GLU*     5.1     0.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 296 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41D  PRO*     3.4    31.4    -      -       +      +
     42D  ASP*     4.0     2.7    -      -       -      -
     43D  PHE*     3.6    19.6    -      +       -      -
    209D  LEU*     3.7    29.8    -      -       +      -
    211D  TYR*     2.9    27.6    -      -       +      +
    234D  LYS      5.6     0.9    -      -       -      -
    292D  ALA*     2.8    32.7    +      -       +      +
    293D  ARG*     3.7     5.4    -      -       -      +
    295D  ALA*     1.3    74.8    -      -       -      +
    297D  ARG*     1.3    58.4    +      -       -      +
    299D  ARG*     3.2    33.8    +      -       -      +
    300D  ARG*     2.9    25.6    +      -       -      +
    321D  PHE*     4.1    18.6    -      +       +      -
    364D  TYR*     3.4    19.1    -      -       +      -
    365D  ALA*     4.5     4.9    -      -       -      -
----------------------------------------------------------
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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
----------------------------------------------------------
    210D  LEU      4.4     0.2    +      -       -      -
    211D  TYR*     2.8    56.3    +      -       +      +
    212D  GLU*     4.0     7.3    +      -       -      -
    293D  ARG*     2.9    37.6    +      -       -      +
    294D  GLU*     3.7    13.7    -      -       -      +
    296D  TYR*     1.3    76.5    -      -       -      +
    298D  ARG*     1.3    63.1    +      -       -      +
    300D  ARG*     3.2    17.4    +      -       -      +
    301D  ASP*     3.1    40.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 298 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    291D  MET      5.5     0.4    +      -       -      -
    294D  GLU*     2.8    57.4    +      -       +      +
    295D  ALA*     3.6    19.9    -      -       -      +
    296D  TYR      3.3     0.2    -      -       -      -
    297D  ARG*     1.3    80.3    -      -       +      +
    299D  ARG*     1.3    58.2    +      -       -      +
    301D  ASP*     3.4     7.5    +      -       -      +
    302D  LEU*     3.0    28.9    +      -       -      +
    368D  GLU*     3.6    22.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 299 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     42D  ASP*     2.8    41.4    +      -       -      -
     43D  PHE*     4.2    12.3    -      -       -      -
    295D  ALA*     3.2    24.1    +      -       -      +
    296D  TYR*     3.2    28.9    +      -       -      +
    298D  ARG*     1.3    74.7    -      -       -      +
    300D  ARG*     1.3    60.3    +      -       -      +
    302D  LEU*     3.6     5.3    -      -       -      +
    303D  LEU*     2.9    30.5    +      -       -      +
    364D  TYR*     3.2    25.0    +      -       +      +
    366D  THR      2.9    23.1    +      -       -      +
    367D  SER*     4.5     6.3    -      -       -      +
    368D  GLU*     4.2    17.6    -      -       +      +
    371D  LEU*     3.6    24.3    -      -       +      +
----------------------------------------------------------
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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
----------------------------------------------------------
    211D  TYR*     3.5    20.0    -      -       +      +
    212D  GLU*     2.6    34.8    +      -       -      -
    296D  TYR      2.9    13.8    +      -       -      +
    297D  ARG*     3.5    22.6    +      -       -      +
    299D  ARG*     1.3    76.3    -      -       -      +
    301D  ASP*     1.3    82.0    +      -       -      +
    303D  LEU*     3.2     3.7    +      -       -      +
    304D  LEU*     2.9    50.1    +      -       +      +
    316D  ARG*     3.2    24.1    -      -       -      +
    317D  PRO*     3.0    33.5    +      -       +      -
    323D  VAL*     5.2     0.4    -      -       +      -
    364D  TYR*     3.6    34.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 301 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    297D  ARG*     3.1    27.0    +      -       -      +
    298D  ARG*     3.8     6.3    -      -       -      +
    300D  ARG*     1.3   104.7    +      -       -      +
    302D  LEU*     1.3    62.9    +      -       -      +
    304D  LEU*     3.4     6.3    +      -       -      +
    305D  GLU*     3.0    42.5    +      -       +      +
    316D  ARG*     5.0     2.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 302 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    298D  ARG      3.0    16.8    +      -       -      +
    299D  ARG      3.6     4.3    -      -       -      +
    301D  ASP*     1.3    76.8    -      -       -      +
    303D  LEU*     1.3    64.3    +      -       -      +
    305D  GLU*     3.4    10.3    +      -       -      +
    306D  GLY*     3.2    18.0    +      -       -      -
    368D  GLU*     3.8    41.1    -      -       +      +
    371D  LEU*     4.0    20.0    -      -       +      -
    372D  ARG*     3.8    30.3    -      -       +      +
    375D  LEU*     3.9    21.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 303 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     36D  LEU*     5.6     5.4    -      -       +      -
    299D  ARG      2.9    17.7    +      -       -      +
    300D  ARG*     3.6     4.3    -      -       -      +
    302D  LEU*     1.3    81.8    -      -       -      +
    304D  LEU*     1.3    63.7    +      -       +      +
    306D  GLY*     3.2     4.0    +      -       -      -
    307D  LEU*     3.0    45.1    +      -       +      +
    323D  VAL*     4.1    26.7    -      -       +      -
    362D  LEU*     4.4    24.2    -      -       +      -
    363D  SER      5.5     0.2    -      -       -      -
    364D  TYR*     4.1    18.2    -      -       +      +
    371D  LEU*     4.2    22.2    -      -       +      +
    374D  ALA*     6.3     1.3    -      -       +      -
    375D  LEU*     4.1    18.3    -      -       +      +
    378D  PHE*     5.2     2.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 304 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    300D  ARG*     2.9    41.7    +      -       +      +
    301D  ASP*     3.9     6.3    -      -       -      +
    303D  LEU*     1.3    72.8    -      -       +      +
    305D  GLU*     1.3    62.6    +      -       +      +
    307D  LEU*     3.3    13.0    +      -       +      +
    308D  THR*     3.0    29.5    +      -       -      +
    314D  ALA*     4.6    11.2    -      -       +      +
    316D  ARG*     3.5    41.3    -      -       +      +
    317D  PRO*     4.0     8.3    -      -       +      -
    323D  VAL*     4.2    27.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 305 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    301D  ASP*     3.0    35.7    +      -       -      +
    302D  LEU*     3.7     8.0    +      -       -      +
    304D  LEU*     1.3    76.7    -      -       +      +
    306D  GLY*     1.3    58.4    +      -       -      +
    308D  THR*     3.3     6.9    +      -       -      -
    309D  ALA*     2.9    30.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 306 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    302D  LEU      3.2     4.8    +      -       -      -
    303D  LEU      3.2     6.5    +      -       -      -
    305D  GLU*     1.3    80.1    -      -       -      +
    307D  LEU*     1.3    60.4    +      -       -      +
    309D  ALA*     3.4     7.4    +      -       -      +
    310D  LEU*     3.1    28.1    +      -       -      +
    375D  LEU*     3.8    26.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 307 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    303D  LEU*     3.0    30.0    +      -       +      +
    304D  LEU*     3.3    13.4    +      -       +      +
    306D  GLY*     1.3    74.1    -      -       -      +
    308D  THR*     1.3    61.9    +      -       -      +
    310D  LEU*     3.0     6.8    +      -       -      +
    311D  GLY      2.9     4.9    +      -       -      -
    312D  LEU*     2.9    42.9    +      -       +      +
    314D  ALA*     4.1    24.2    -      -       +      -
    323D  VAL*     4.4     8.1    -      -       +      -
    325D  MET*     3.9    16.2    -      -       +      -
    362D  LEU*     4.2    12.8    -      -       +      -
    375D  LEU*     4.0     7.2    -      -       +      -
    378D  PHE*     3.8    34.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 308 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    304D  LEU*     3.0    19.0    +      -       -      +
    305D  GLU*     3.6     6.7    -      -       -      -
    307D  LEU*     1.3    76.1    -      -       -      +
    309D  ALA*     1.3    59.9    +      -       -      +
    311D  GLY*     2.9    20.9    +      -       -      +
    312D  LEU      4.2     5.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 309 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    305D  GLU      2.9    17.0    +      -       -      +
    306D  GLY*     3.5     9.4    -      -       -      +
    307D  LEU      3.2     0.2    -      -       -      -
    308D  THR*     1.3    78.6    -      -       -      +
    310D  LEU*     1.3    63.7    +      -       +      +
    311D  GLY      3.3     0.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 310 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    306D  GLY      3.1    13.8    +      -       -      +
    307D  LEU      3.0     8.5    +      -       -      +
    309D  ALA*     1.3    80.6    -      -       +      +
    311D  GLY*     1.3    61.5    +      -       -      +
    312D  LEU*     3.6    16.3    +      -       +      -
    375D  LEU*     3.8    19.1    -      -       +      +
    378D  PHE*     3.6    32.3    -      -       +      -
    379D  ALA*     3.8    26.9    -      -       +      +
    382D  LEU*     4.0    19.8    -      -       +      +
----------------------------------------------------------
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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