Contacts of the helix formed by residues 438 - 461 (chain C) in PDB entry 6UZA


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 GLY 438 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    393C  GLU*     3.8    14.8    -      -       -      -
    394C  ASN*     4.9     4.0    -      -       -      -
    395C  LEU*     6.3     1.8    -      -       -      -
    434C  LYS      4.2     2.8    +      -       -      -
    435C  ILE      3.2    14.0    +      -       -      -
    436C  MET      4.3     0.2    -      -       -      +
    437C  ARG*     1.3    81.7    -      -       -      +
    439C  PRO*     1.3    75.7    -      -       -      +
    440C  PHE      3.4     2.5    -      -       -      -
    441C  MET      3.8     2.6    +      -       -      -
    442C  LYS*     3.2    22.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with PRO 439 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    360C  ARG*     4.6     7.0    -      -       -      +
    390C  ILE      3.4    25.4    -      -       -      +
    391C  TRP*     3.6    34.1    -      -       +      +
    393C  GLU*     3.8    11.4    -      -       +      +
    437C  ARG      4.4     1.3    -      -       -      +
    438C  GLY*     1.3    85.7    -      -       -      +
    440C  PHE*     1.3    55.7    +      -       -      +
    442C  LYS*     3.4     4.6    +      -       +      +
    443C  PHE*     2.9    27.5    +      -       -      +
    753C  TYR*     3.9    25.7    -      -       +      +
    754C  PHE*     3.6    21.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 440 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    391C  TRP*     3.4    48.3    +      +       -      +
    392C  TYR*     3.7    19.1    -      +       +      -
    395C  LEU*     3.6    25.6    -      -       +      -
    398C  LEU*     4.1    25.1    -      -       +      -
    406C  LYS*     4.2    28.7    -      -       +      -
    409C  VAL*     5.6     1.1    -      -       +      -
    438C  GLY      3.4     0.6    -      -       -      -
    439C  PRO*     1.3    76.2    -      -       -      +
    441C  MET*     1.3    62.9    +      -       -      +
    443C  PHE*     3.3     9.7    +      +       -      +
    444C  VAL*     2.9    48.5    +      -       +      +
   1005C  Y01      3.6    24.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 441 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    395C  LEU*     3.8    24.8    -      -       +      +
    398C  LEU*     4.5    15.9    -      -       -      -
    409C  VAL*     5.4     5.8    -      -       +      -
    413C  VAL*     4.4    24.2    -      -       +      -
    420C  LEU*     5.9     3.1    -      -       +      -
    432C  MET*     6.2     3.1    -      -       +      -
    435C  ILE*     3.5    39.5    -      -       +      +
    436C  MET*     4.1    23.7    -      -       +      +
    438C  GLY      3.8     2.7    +      -       -      +
    439C  PRO      3.4     0.2    -      -       -      -
    440C  PHE*     1.3    74.5    -      -       -      +
    442C  LYS*     1.3    60.1    +      -       -      +
    444C  VAL*     3.4    14.3    +      -       +      +
    445C  ALA*     2.9    28.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 442 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    436C  MET      4.6     4.4    +      -       -      +
    437C  ARG*     4.0    15.5    +      -       -      +
    438C  GLY      3.2    22.2    +      -       -      +
    439C  PRO*     3.5     5.4    -      -       -      +
    441C  MET*     1.3    76.1    -      -       -      +
    443C  PHE*     1.3    58.0    +      -       -      +
    445C  ALA*     3.4     4.8    +      -       -      +
    446C  HIS*     3.0    40.7    +      -       +      -
    753C  TYR*     3.3    28.3    +      -       +      -
    754C  PHE      5.1     0.2    -      -       -      -
    755C  GLU      3.4    18.2    +      -       -      -
    756C  GLU*     5.0     1.2    -      -       -      +
    757C  GLY      4.8     6.1    -      -       -      +
    758C  ARG      3.6    17.2    +      -       -      +
    759C  THR*     4.1    28.5    +      -       +      +
   1002C  R0G      3.5    24.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 443 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    391C  TRP*     3.7    24.9    -      +       +      -
    439C  PRO      2.9    17.2    +      -       -      +
    440C  PHE*     3.5    16.6    -      +       -      +
    442C  LYS*     1.3    75.6    -      -       -      +
    444C  VAL*     1.3    61.4    +      -       +      +
    446C  HIS*     3.4     1.0    +      -       -      +
    447C  ALA*     2.9    29.2    +      -       +      +
    612C  TYR      4.6     2.9    -      -       -      -
    613C  ILE*     3.8    42.2    -      -       +      -
    616C  ALA*     3.7    28.7    -      -       +      -
    749C  LEU*     4.6     3.6    -      -       +      -
    753C  TYR*     3.5    35.1    -      +       +      -
   1002C  R0G      5.9     0.2    -      +       -      -
   1005C  Y01      4.3    31.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 444 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    406C  LYS      5.4     0.2    -      -       -      +
    409C  VAL*     4.2    11.4    -      -       +      +
    410C  VAL*     4.0    34.1    -      -       +      +
    413C  VAL*     3.9    26.7    -      -       +      -
    440C  PHE*     2.9    48.2    +      -       +      +
    441C  MET*     3.7    15.7    -      -       +      +
    442C  LYS      3.3     0.2    -      -       -      -
    443C  PHE*     1.3    80.6    -      -       +      +
    445C  ALA*     1.3    58.7    +      -       -      +
    447C  ALA*     3.4     2.3    +      -       -      +
    448C  ALA*     2.9    28.6    +      -       -      +
   1005C  Y01      6.0     1.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 445 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    413C  VAL*     4.2    20.0    -      -       +      -
    417C  LEU*     4.5     3.7    -      -       +      +
    441C  MET*     2.9    17.8    +      -       +      +
    442C  LYS*     3.7     7.0    -      -       -      +
    443C  PHE      3.3     0.2    -      -       -      -
    444C  VAL*     1.3    77.0    -      -       -      +
    446C  HIS*     1.3    57.1    +      -       +      +
    448C  ALA*     3.3     1.9    +      -       -      +
    449C  SER*     3.0    30.0    +      -       -      -
    759C  THR      4.9     5.4    -      -       -      +
    761C  PRO*     3.7    24.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with HIS 446 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    442C  LYS*     3.0    38.0    +      -       +      +
    443C  PHE      3.9     3.4    -      -       -      +
    445C  ALA*     1.3    78.5    -      -       -      +
    447C  ALA*     1.3    59.6    +      -       -      +
    449C  SER*     3.9     3.5    +      -       -      +
    450C  PHE*     3.7    14.0    +      -       -      +
    753C  TYR*     4.5     4.9    -      +       -      +
    758C  ARG*     3.5    26.2    +      -       +      -
    759C  THR      4.4     5.2    +      -       -      -
    760C  LEU      4.4     3.5    +      -       -      -
    761C  PRO*     4.1    29.2    -      -       +      +
    762C  VAL*     4.9     5.0    +      -       +      +
   1002C  R0G      3.4    64.0    -      +       +      -
----------------------------------------------------------
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Residues in contact with ALA 447 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    410C  VAL*     4.8     5.8    -      -       +      -
    443C  PHE*     2.9    20.2    +      -       +      +
    444C  VAL*     3.9     4.9    -      -       -      +
    446C  HIS*     1.3    77.7    -      -       -      +
    448C  ALA*     1.3    59.4    +      -       -      +
    450C  PHE*     3.2     8.2    +      -       -      +
    451C  THR*     3.0    30.7    +      -       -      +
    613C  ILE*     4.2    22.7    -      -       +      -
   1002C  R0G      4.5     0.6    -      -       -      -
   1005C  Y01      4.1    26.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 448 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    410C  VAL*     3.6    25.2    -      -       -      +
    413C  VAL*     3.9    10.5    -      -       +      +
    414C  ALA*     3.6    18.5    -      -       -      +
    417C  LEU*     4.8     1.8    -      -       +      -
    444C  VAL      2.9    18.2    +      -       -      +
    445C  ALA      3.3     4.9    +      -       -      +
    447C  ALA*     1.3    76.3    -      -       -      +
    449C  SER*     1.3    58.2    +      -       -      +
    451C  THR*     3.3     8.9    +      -       -      -
    452C  ILE*     3.0    34.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 449 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    417C  LEU*     4.1    15.6    -      -       -      +
    445C  ALA      3.0    16.5    +      -       -      -
    446C  HIS*     4.2     5.4    -      -       -      -
    447C  ALA      3.3     0.2    -      -       -      -
    448C  ALA*     1.3    75.6    -      -       -      +
    450C  PHE*     1.3    56.2    +      -       -      +
    452C  ILE*     4.1     5.8    -      -       -      -
    453C  PHE*     3.8     6.1    +      -       -      +
    501C  TRP*     3.1    21.0    +      -       -      +
    761C  PRO*     3.6    17.9    -      -       -      -
    762C  VAL*     3.4    12.2    -      -       -      +
    763C  PRO*     3.3    24.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 450 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    446C  HIS      3.7    11.0    +      -       -      +
    447C  ALA*     3.2     7.9    +      -       -      +
    448C  ALA      3.1     0.6    -      -       -      -
    449C  SER*     1.3    75.0    -      -       -      +
    451C  THR*     1.3    62.1    +      -       -      +
    452C  ILE      3.2     0.9    -      -       -      -
    453C  PHE*     3.3    15.1    +      +       -      +
    454C  LEU*     3.0    63.4    +      -       +      +
    505C  MET*     6.2     1.8    -      -       +      -
    606C  SER      3.5    25.8    -      -       -      -
    607C  PHE*     4.7     0.4    -      -       -      -
    609C  ARG*     3.7    33.7    -      -       +      +
    610C  ILE*     3.7    28.9    -      -       +      -
    613C  ILE*     4.5    17.7    -      -       +      -
   1002C  R0G      4.5    12.6    -      +       +      -
   1005C  Y01      5.1     5.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 451 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    410C  VAL*     4.4     6.3    -      -       -      +
    411C  LEU*     4.3    19.5    -      -       +      -
    414C  ALA*     4.8     8.5    -      -       +      -
    447C  ALA      3.0    14.8    +      -       -      -
    448C  ALA*     3.6    12.4    -      -       -      -
    450C  PHE*     1.3    77.8    -      -       -      +
    452C  ILE*     1.3    57.0    +      -       -      +
    454C  LEU*     3.5     6.9    +      -       -      +
    455C  GLY*     2.9    25.5    +      -       -      -
   1005C  Y01      3.5    47.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 452 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    414C  ALA*     3.3    36.3    -      -       +      +
    417C  LEU*     3.8    29.4    -      -       +      -
    448C  ALA      3.0    21.9    +      -       -      +
    449C  SER*     4.4     2.7    -      -       -      +
    451C  THR*     1.3    73.7    -      -       -      +
    453C  PHE*     1.3    57.4    +      -       -      +
    455C  GLY*     3.2     2.6    +      -       -      +
    456C  LEU*     2.9    37.1    +      -       +      +
    501C  TRP*     3.6    31.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 453 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    449C  SER      3.8     6.1    +      -       -      +
    450C  PHE*     3.3    23.7    +      +       +      +
    452C  ILE*     1.3    78.3    -      -       -      +
    454C  LEU*     1.3    63.0    +      -       +      +
    456C  LEU*     3.3    10.9    +      -       +      +
    457C  LEU*     3.0    48.1    +      -       +      +
    498C  ILE*     3.9    22.2    -      -       +      -
    501C  TRP*     3.8    46.6    -      +       +      +
    502C  VAL*     4.3     8.7    -      -       +      -
    505C  MET*     4.3    20.2    -      -       +      -
    533C  MET*     5.4     0.7    -      -       +      -
    537C  PHE*     4.1    24.7    -      +       -      -
    606C  SER*     4.2    15.3    -      -       -      -
    609C  ARG*     6.3     1.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 454 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    450C  PHE*     3.0    58.0    +      -       +      +
    451C  THR*     3.9     4.7    -      -       -      +
    453C  PHE*     1.3    78.6    -      -       +      +
    455C  GLY*     1.3    57.9    +      -       -      +
    457C  LEU*     3.3     8.3    +      -       +      +
    458C  VAL*     3.0    32.1    +      -       -      +
    606C  SER*     4.3    11.2    -      -       -      +
    607C  PHE*     3.9    41.8    -      -       +      -
    610C  ILE*     4.8     3.8    -      -       +      -
   1005C  Y01      3.9    39.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 455 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    451C  THR      2.9    15.3    +      -       -      -
    452C  ILE*     3.2     4.4    +      -       -      -
    454C  LEU*     1.3    76.5    -      -       -      +
    456C  LEU*     1.3    59.0    +      -       -      +
    458C  VAL*     3.4     2.5    +      -       -      +
    459C  MET*     2.9    36.5    +      -       -      +
   1005C  Y01      4.3    13.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 456 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    452C  ILE*     2.9    25.0    +      -       +      +
    453C  PHE*     3.6     9.2    -      -       +      +
    455C  GLY*     1.3    77.9    -      -       -      +
    457C  LEU*     1.3    57.6    +      -       -      +
    459C  MET*     3.7     0.6    -      -       +      -
    460C  ASN*     2.9    33.1    +      -       -      +
    493C  TRP*     6.1     2.9    -      -       +      -
    494C  MET*     3.8    28.1    -      -       +      +
    497C  LEU*     3.8    34.1    -      -       +      -
    498C  ILE*     4.2    18.6    -      -       +      +
    501C  TRP*     4.1    26.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 457 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    453C  PHE*     3.0    37.3    +      -       +      +
    454C  LEU*     3.7    13.0    -      -       +      +
    456C  LEU*     1.3    76.2    -      -       -      +
    458C  VAL*     1.3    62.6    +      -       +      +
    460C  ASN*     4.0     8.4    +      -       -      +
    461C  ALA      4.6     1.2    +      -       -      -
    498C  ILE*     4.1    15.3    -      -       +      -
    537C  PHE*     4.2    12.1    -      -       +      -
    599C  TYR*     3.3    26.1    +      -       +      +
    603C  VAL*     3.8    29.2    -      -       +      +
    606C  SER*     3.3    27.1    -      -       -      +
    607C  PHE*     4.9     5.2    -      -       +      -
    650D  ILE*     4.4     5.7    -      -       +      +
    654D  ASN*     4.3    16.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 458 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    454C  LEU      3.0    20.1    +      -       -      +
    455C  GLY*     3.8     6.5    -      -       -      +
    456C  LEU      3.2     0.2    -      -       -      -
    457C  LEU*     1.3    79.7    -      -       +      +
    459C  MET*     1.3    74.4    +      -       +      +
    460C  ASN      3.2     2.0    +      -       -      -
    461C  ALA*     3.7     8.1    +      -       -      +
    465C  PHE*     3.9    28.7    -      -       +      -
    607C  PHE*     5.0     2.7    -      -       +      -
   1005C  Y01      3.8    23.8    -      -       +      -
    650D  ILE*     3.7    35.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with MET 459 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    455C  GLY*     2.9    20.8    +      -       -      +
    456C  LEU*     4.9     0.7    -      -       +      -
    458C  VAL*     1.3    84.5    -      -       +      +
    460C  ASN*     1.3    64.0    +      -       -      +
    461C  ALA      3.4     0.4    -      -       -      -
    462C  ALA*     3.3    31.2    -      -       +      +
    465C  PHE*     4.6    13.0    -      -       +      -
    494C  MET*     3.3    28.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 460 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    456C  LEU      2.9    18.2    +      -       -      +
    457C  LEU      4.1     7.0    -      -       -      +
    458C  VAL      3.2     1.2    -      -       -      -
    459C  MET*     1.3    78.3    -      -       -      +
    461C  ALA*     1.3    61.4    +      -       -      +
    462C  ALA      3.2     4.6    +      -       -      -
    463C  ASP*     4.9     1.4    +      -       -      +
    464C  ARG*     5.1     1.6    +      -       -      -
    492C  SER*     5.5     3.3    -      -       -      -
    494C  MET*     3.7    21.1    -      -       -      +
    495C  GLU*     4.5    14.1    +      -       -      +
    498C  ILE*     4.1    16.6    -      -       +      +
    599C  TYR*     3.1    29.2    +      -       -      +
    654D  ASN*     6.2     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 461 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    457C  LEU      4.6     1.4    +      -       -      +
    458C  VAL      3.7     5.7    +      -       -      +
    459C  MET      3.4     0.4    -      -       -      -
    460C  ASN*     1.3    78.6    -      -       +      +
    462C  ALA*     1.3    57.3    +      -       -      +
    463C  ASP      3.5     2.7    -      -       -      +
    464C  ARG*     3.4    43.7    +      -       -      +
    465C  PHE*     3.2    23.0    -      -       -      -
    653D  PHE*     3.6    12.6    -      -       +      -
    654D  ASN*     3.6    23.1    -      -       -      +
----------------------------------------------------------
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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