Contacts of the helix formed by residues 361 - 386 (chain B) in PDB entry 5NC5


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 ASN 361 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    355B  MET      5.4     0.2    -      -       -      +
    356B  TYR*     3.7    10.2    -      -       -      -
    359B  LEU*     3.2    11.3    +      -       -      +
    360B  GLN*     1.3    82.3    +      -       -      +
    362B  PHE*     1.3    64.1    +      -       -      +
    363B  ARG*     3.3    30.8    +      -       -      +
    364B  ALA*     3.3    13.6    +      -       -      +
    365B  THR*     3.5    14.2    +      -       -      -
    417B  GLU*     3.3    25.2    +      -       -      -
    497B  LEU*     4.8     2.1    -      -       -      +
    498B  LYS*     5.0    11.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 362 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    352B  PHE*     4.3    26.9    -      +       -      -
    356B  TYR*     3.3    48.0    -      +       -      -
    361B  ASN*     1.3    71.1    -      -       -      +
    363B  ARG*     1.3    67.2    +      -       +      +
    365B  THR*     3.0    26.1    +      -       +      +
    366B  LEU*     3.0    13.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 363 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    361B  ASN*     3.3    12.0    +      -       -      +
    362B  PHE*     1.3    80.3    -      -       +      +
    364B  ALA*     1.3    64.2    +      -       -      +
    366B  LEU*     3.3    12.7    +      -       -      +
    367B  ILE*     3.6    13.3    -      -       -      +
    495B  THR      5.2     1.4    +      -       -      -
    496B  MET*     2.8    52.3    +      -       +      +
    497B  LEU*     4.0     6.7    -      -       +      +
    498B  LYS*     3.7    46.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 364 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    355B  MET*     3.8     6.4    -      -       +      +
    359B  LEU*     3.7    27.8    -      -       +      -
    361B  ASN*     3.3    24.2    +      -       -      +
    362B  PHE      3.4     0.4    -      -       -      -
    363B  ARG*     1.3    78.4    -      -       -      +
    365B  THR*     1.3    63.3    +      -       -      +
    367B  ILE*     3.2    15.8    +      -       -      +
    368B  PRO*     3.2    11.4    -      -       -      +
    413B  VAL*     4.1     6.0    -      -       +      +
    417B  GLU*     4.1     3.1    -      -       -      +
    497B  LEU*     3.3    22.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with THR 365 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    351B  VAL*     5.6     0.2    -      -       -      +
    352B  PHE*     3.0    64.3    +      -       +      -
    355B  MET*     3.6    18.2    -      -       -      +
    356B  TYR*     3.7     7.5    +      -       -      +
    361B  ASN      3.5     5.8    +      -       -      -
    362B  PHE*     3.0    28.1    +      -       +      +
    364B  ALA*     1.3    79.4    -      -       -      +
    366B  LEU*     1.3    72.9    +      -       +      +
    367B  ILE      3.4     0.5    +      -       -      -
    368B  PRO*     3.5     9.2    -      -       -      +
    369B  THR*     3.5    13.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 366 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    352B  PHE*     5.1     3.6    -      -       +      -
    362B  PHE*     3.0    15.0    +      -       +      +
    363B  ARG*     3.7     1.6    -      -       -      +
    364B  ALA      3.2     0.6    -      -       -      -
    365B  THR*     1.3    95.2    -      -       +      +
    367B  ILE*     1.3    65.0    +      -       -      +
    369B  THR*     2.9    22.7    +      -       +      -
    370B  ILE*     3.0    25.5    +      -       +      +
    496B  MET*     3.6    28.7    -      -       +      -
   1110B  D10      5.3    10.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 367 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    363B  ARG      3.6    14.1    -      -       -      +
    364B  ALA      3.7     2.9    -      -       -      +
    366B  LEU*     1.3    75.7    -      -       -      +
    368B  PRO*     1.3    66.1    -      -       +      +
    370B  ILE*     3.1     6.4    +      -       -      +
    371B  ALA*     2.9    25.5    +      -       -      +
    409B  ALA*     6.1     0.2    -      -       +      -
    413B  VAL*     3.4    21.5    -      -       +      -
    489B  THR*     4.0    16.4    -      -       +      +
    492B  LEU*     4.0    29.7    -      -       +      +
    493B  CYS*     3.7    39.5    -      -       -      +
    496B  MET*     4.4    11.2    -      -       +      -
    497B  LEU*     3.9    18.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with PRO 368 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    351B  VAL*     3.6    29.4    -      -       +      -
    355B  MET*     3.7    23.8    -      -       +      -
    364B  ALA      3.2    15.0    -      -       -      +
    365B  THR      3.5     7.9    -      -       -      +
    367B  ILE*     1.3    91.9    -      -       +      +
    369B  THR*     1.3    55.8    +      -       -      +
    371B  ALA*     4.2     1.8    -      -       +      +
    372B  VAL*     2.8    38.4    +      -       +      +
    409B  ALA*     3.7    32.3    -      -       +      -
    410B  ILE      5.1     0.7    -      -       -      +
    413B  VAL*     4.7     2.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 369 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    348B  ILE*     3.9    35.5    +      -       +      +
    351B  VAL*     5.4     0.7    -      -       -      +
    352B  PHE*     4.2    14.1    +      -       +      +
    365B  THR      3.5    12.3    +      -       -      -
    366B  LEU*     2.9    20.2    +      -       +      +
    368B  PRO*     1.3    78.9    -      -       -      +
    370B  ILE*     1.3    58.0    +      -       +      +
    373B  PRO*     3.4    20.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 370 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     13B  TRP*     4.1    30.5    -      -       +      -
     20B  MET*     5.4     1.5    -      -       +      +
    366B  LEU*     3.0    26.3    +      -       +      +
    367B  ILE*     3.6     5.2    -      -       -      +
    369B  THR*     1.3    80.8    -      -       +      +
    371B  ALA*     1.3    66.9    +      -       -      +
    372B  VAL      3.3     0.4    +      -       -      -
    373B  PRO*     3.6     4.1    -      -       -      +
    374B  VAL*     3.2    28.7    +      -       +      +
    488B  LEU*     4.1    11.4    -      -       +      -
    492B  LEU*     3.9    28.7    -      -       +      -
    496B  MET*     4.6    11.9    -      -       +      -
   1110B  D10      4.2    31.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 371 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    367B  ILE      2.9    15.5    +      -       -      +
    368B  PRO*     4.1     5.6    -      -       +      +
    370B  ILE*     1.3    77.1    -      -       -      +
    372B  VAL*     1.3    65.2    +      -       +      +
    374B  VAL*     3.2     4.7    +      -       -      +
    375B  VAL*     3.1    24.8    +      -       -      +
    409B  ALA*     4.5     7.0    -      -       +      -
    484B  VAL*     4.1    11.1    -      -       +      +
    488B  LEU*     4.3    10.3    -      -       +      -
    489B  THR*     3.5    32.8    -      -       +      -
    492B  LEU*     5.1     0.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 372 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    348B  ILE*     3.6    26.5    -      -       +      -
    351B  VAL*     6.0     2.0    -      -       +      -
    368B  PRO*     2.8    22.9    +      -       +      +
    371B  ALA*     1.3    71.8    -      -       -      +
    373B  PRO*     1.3    73.9    -      -       +      +
    375B  VAL*     3.0     8.9    +      -       -      +
    376B  LEU*     3.0    31.2    +      -       +      +
    405B  LEU*     4.2    29.9    -      -       +      +
    406B  VAL*     4.3    22.0    -      -       +      -
    409B  ALA*     4.5    10.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with PRO 373 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     20B  MET*     5.4     7.2    -      -       +      -
    348B  ILE*     3.7    21.5    -      -       +      -
    368B  PRO      3.8     1.1    -      -       -      +
    369B  THR      3.4    25.8    -      -       -      +
    370B  ILE*     3.6     5.2    -      -       -      +
    372B  VAL*     1.3    99.9    -      -       +      +
    374B  VAL*     1.3    56.1    +      -       +      +
    376B  LEU*     3.7    10.8    -      -       +      +
    377B  LEU*     2.8    39.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 374 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     13B  TRP*     6.2     0.4    -      -       +      -
     16B  ALA*     4.3    16.8    -      -       +      +
     19B  ILE*     3.4    22.1    -      -       +      +
     20B  MET*     4.0    34.1    -      -       +      -
    370B  ILE*     3.2    19.1    -      -       +      +
    371B  ALA      3.2     8.7    +      -       -      +
    372B  VAL      3.2     0.8    -      -       -      -
    373B  PRO*     1.3    76.2    -      -       -      +
    375B  VAL*     1.3    59.6    +      -       -      +
    377B  LEU*     4.1     0.2    -      -       -      +
    378B  GLY*     2.9    23.2    +      -       -      -
    480B  LEU*     5.2     0.2    -      -       -      +
    484B  VAL*     3.9    21.3    -      -       +      +
    488B  LEU*     4.1    20.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 375 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    371B  ALA      3.1     8.7    +      -       -      +
    372B  VAL*     3.0    10.7    +      -       -      +
    374B  VAL*     1.3    75.5    -      -       -      +
    376B  LEU*     1.3    56.4    +      -       -      +
    378B  GLY      3.8     0.9    -      -       -      -
    379B  THR*     2.7    40.1    +      -       -      +
    405B  LEU*     3.9    26.5    -      -       +      -
    477B  ALA      3.7    23.1    -      -       -      +
    480B  LEU*     3.6     7.6    -      -       +      +
    481B  SER*     3.5    23.1    -      -       -      +
    484B  VAL*     3.3    33.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 376 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    344B  LEU*     3.7    48.2    -      -       +      -
    348B  ILE*     4.6     7.4    -      -       +      -
    372B  VAL*     3.0    28.6    +      -       +      +
    373B  PRO*     3.7    11.0    -      -       +      +
    375B  VAL*     1.3    74.1    -      -       -      +
    377B  LEU*     1.3    66.2    +      -       +      +
    379B  THR*     3.2    13.3    +      -       -      -
    380B  PHE*     2.9    31.3    +      -       +      -
    398B  MET*     3.8    26.5    -      -       +      +
    405B  LEU*     4.1    18.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 377 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     19B  ILE      4.1     8.1    -      -       -      +
     20B  MET*     3.7    47.8    -      -       +      +
     23B  GLY*     3.4    14.2    -      -       -      -
     24B  GLY*     4.1     3.1    -      -       -      +
     27B  ILE*     3.7    24.7    -      -       +      -
    373B  PRO*     2.8    24.5    +      -       +      +
    374B  VAL      4.1     2.7    -      -       -      +
    376B  LEU*     1.3    71.3    -      -       +      +
    378B  GLY*     1.3    65.6    +      -       -      +
    379B  THR      2.9     1.7    +      -       -      -
    380B  PHE*     2.9    19.7    +      -       +      -
    381B  ALA      3.2     8.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 378 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     19B  ILE*     3.3    28.6    -      -       -      +
    374B  VAL      2.9    14.3    +      -       -      -
    375B  VAL      3.9     1.3    -      -       -      -
    377B  LEU*     1.3    76.6    -      -       -      +
    379B  THR*     1.3    56.2    +      -       -      +
    381B  ALA*     3.3     8.3    +      -       -      +
    382B  VAL*     3.1    23.2    +      -       -      +
    480B  LEU*     3.3    19.7    -      -       -      +
   1118B  D10      5.0     2.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 379 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    375B  VAL      2.7    22.9    +      -       -      -
    376B  LEU*     3.5     6.9    -      -       -      -
    377B  LEU      3.0     0.4    -      -       -      -
    378B  GLY*     1.3    75.1    -      -       -      +
    380B  PHE*     1.3    60.7    +      -       -      +
    382B  VAL*     3.2     2.6    +      -       -      +
    383B  LEU*     2.8    35.4    +      -       +      +
    398B  MET*     3.5    22.9    -      -       +      -
    473B  THR*     4.2     7.4    -      -       +      +
    476B  SER*     4.4     4.9    -      -       -      -
    477B  ALA*     3.3    43.8    -      -       +      +
    480B  LEU*     3.6    11.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 380 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     26B  ALA*     3.3     9.4    -      -       +      +
     27B  ILE*     3.3    35.4    -      -       +      -
     30B  LEU*     4.2    19.2    -      -       +      +
    344B  LEU*     5.1     6.3    -      -       +      -
    376B  LEU*     2.9    41.5    +      -       +      -
    377B  LEU*     2.9    14.7    +      -       +      +
    379B  THR*     1.3    76.0    -      -       -      +
    381B  ALA*     1.3    57.1    +      -       -      +
    383B  LEU*     3.8    12.0    -      -       +      +
    384B  ALA*     2.9    30.3    +      -       -      +
    390B  ILE*     5.4     1.1    -      -       +      -
    398B  MET*     3.3    26.9    -      -       +      -
   1117B  D10      3.2    42.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 381 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     22B  ALA*     3.7    38.1    -      -       +      +
     23B  GLY*     3.8     3.1    -      -       -      +
     26B  ALA*     3.8    10.6    -      -       -      +
    377B  LEU      3.2     5.6    +      -       -      +
    378B  GLY*     3.4    12.6    -      -       -      +
    379B  THR      3.2     0.2    -      -       -      -
    380B  PHE*     1.3    76.0    -      -       -      +
    382B  VAL*     1.3    65.1    +      -       -      +
    384B  ALA*     4.1     1.2    -      -       -      +
    385B  ALA*     3.3    21.8    +      -       -      +
   1118B  D10      4.8    14.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 382 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    378B  GLY      3.1    14.1    +      -       -      +
    379B  THR      3.2     6.0    +      -       -      +
    381B  ALA*     1.3    72.8    -      -       -      +
    383B  LEU*     1.3    62.6    +      -       -      +
    385B  ALA*     3.0    15.9    +      -       -      +
    386B  PHE*     2.8    46.8    +      -       +      -
    476B  SER*     3.7    23.3    -      -       -      -
    480B  LEU*     3.7    16.8    -      -       +      -
   1113B  D10      4.2     6.1    -      -       +      -
   1118B  D10      4.4    23.1    -      -       +      -
   1119B  DD9      5.5     5.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 383 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     30B  LEU*     4.7     7.2    -      -       +      -
    379B  THR*     2.8    29.3    +      -       +      +
    380B  PHE*     3.8    16.8    -      -       +      +
    382B  VAL*     1.3    75.1    -      -       -      +
    384B  ALA*     1.3    65.7    +      -       -      +
    386B  PHE*     3.3     7.4    +      -       +      -
    387B  GLY      3.1    13.3    +      -       -      -
    388B  PHE*     3.2    42.3    +      -       +      +
    389B  SER      4.6     6.1    -      -       -      +
    390B  ILE*     6.1     1.3    -      -       +      -
    394B  THR*     4.4    20.6    -      -       +      +
    398B  MET*     5.7     2.7    -      -       +      -
    472B  ILE*     4.4     4.9    -      -       +      +
    473B  THR*     4.1    32.1    -      -       +      +
    476B  SER*     4.2     9.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 384 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     26B  ALA*     3.9    13.9    -      -       +      -
     29B  LYS*     6.2     1.1    -      -       +      -
     30B  LEU*     3.0    32.3    -      -       +      +
    380B  PHE      2.9    17.2    +      -       -      +
    381B  ALA      4.1     2.5    -      -       -      +
    383B  LEU*     1.3    77.9    -      -       -      +
    385B  ALA*     1.3    55.1    +      -       -      +
    387B  GLY*     2.6    26.5    +      -       -      +
    388B  PHE      4.5     0.2    -      -       -      -
   1106B  DD9      5.8     0.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 385 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    381B  ALA      3.3    16.6    +      -       -      +
    382B  VAL*     3.0     7.6    +      -       -      +
    384B  ALA*     1.3    77.6    -      -       -      +
    386B  PHE*     1.3    56.7    +      -       -      +
    387B  GLY      3.5     0.2    -      -       -      -
   1106B  DD9      4.4    25.4    -      -       +      +
   1118B  D10      4.5     5.8    -      -       +      -
   1119B  DD9      3.0    56.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 386 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    382B  VAL*     2.8    45.8    -      -       +      -
    383B  LEU*     3.5    11.9    -      -       +      -
    385B  ALA*     1.3    75.7    -      -       -      +
    387B  GLY*     1.3    65.5    +      -       -      +
    388B  PHE*     3.1    24.4    +      +       +      -
    472B  ILE*     4.5    11.0    -      -       +      -
   1112B  DD9      3.9    37.2    -      -       +      -
   1113B  D10      3.5    57.5    -      -       +      +
   1119B  DD9      4.3    28.3    -      -       +      +
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


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

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

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