Contacts of the helix formed by residues 497 - 524 (chain C) in PDB entry 4P5O


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 497 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    493C  LYS*     3.1    26.0    +      -       -      +
    494C  GLN      5.3     0.7    -      -       -      -
    495C  ALA      3.1     4.6    +      -       -      -
    496C  CYS*     1.3    82.6    -      -       -      +
    498C  PHE*     1.3    66.8    +      -       -      +
    499C  GLU      3.5     1.9    +      -       -      -
    500C  TYR*     3.7     6.2    +      -       -      +
    501C  THR*     3.7     9.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 498 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    493C  LYS*     3.8    38.0    +      -       +      +
    497C  GLY*     1.3    70.1    -      -       -      -
    499C  GLU*     1.3    75.4    +      -       +      +
    501C  THR*     2.9    19.7    +      -       -      -
    502C  SER*     2.9    43.0    +      -       -      -
    506C  ARG*     4.3    23.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 499 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    496C  CYS      5.2     0.6    +      -       -      +
    497C  GLY      3.5     1.0    -      -       -      -
    498C  PHE*     1.3    86.2    -      -       +      +
    500C  TYR*     1.3    63.9    +      -       -      +
    502C  SER*     3.3    22.3    +      -       -      -
    503C  LYS*     4.3    14.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 500 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    462C  PHE*     6.2     0.4    -      +       -      -
    463C  GLN*     2.3    76.0    +      -       +      +
    464C  LYS*     6.5     0.4    -      -       +      -
    466C  TYR*     3.9     5.2    -      -       +      +
    467C  ALA*     3.6    19.7    +      -       +      +
    492C  LEU*     4.1    13.9    -      -       +      -
    496C  CYS*     3.7    33.2    +      -       +      +
    497C  GLY      3.7     3.4    +      -       -      +
    498C  PHE      3.2     1.0    -      -       -      -
    499C  GLU*     1.3    80.5    -      -       -      +
    501C  THR*     1.3    64.8    +      -       +      +
    502C  SER      3.1     4.6    +      -       -      -
    503C  LYS*     3.7    25.1    +      -       -      +
    504C  LEU*     3.6    30.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 501 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    489C  ILE*     3.8    17.0    -      -       +      +
    492C  LEU*     3.8    12.6    -      -       +      -
    493C  LYS*     3.2    57.8    -      -       +      +
    497C  GLY      4.1     2.2    -      -       -      +
    498C  PHE*     2.9    16.7    +      -       -      -
    500C  TYR*     1.3    78.7    -      -       +      +
    502C  SER*     1.3    65.0    +      -       -      +
    503C  LYS      3.4     0.4    -      -       -      -
    504C  LEU*     3.8    15.7    -      -       +      -
    505C  GLN*     2.9    27.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 502 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    498C  PHE*     2.9    43.2    +      -       -      -
    499C  GLU*     3.3    22.8    +      -       -      -
    500C  TYR      3.1     1.2    -      -       -      -
    501C  THR*     1.3    79.6    -      -       -      +
    503C  LYS*     1.3    65.5    +      -       -      +
    505C  GLN      3.2     0.2    +      -       -      -
    506C  ARG*     2.9    48.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 503 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    464C  LYS*     4.2    22.6    -      -       -      +
    467C  ALA*     5.3     9.0    -      -       -      +
    499C  GLU*     4.5    14.1    -      -       -      +
    500C  TYR*     3.7    25.3    +      -       +      +
    502C  SER*     1.3    77.0    -      -       -      +
    504C  LEU*     1.3    65.1    +      -       +      +
    506C  ARG*     3.1     9.3    +      -       -      +
    507C  MET*     2.9    29.9    +      -       +      +
    544C  SER*     4.4    19.2    -      -       -      +
    546C  PRO*     5.9     6.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 504 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    466C  TYR*     4.6     3.1    -      -       +      -
    467C  ALA*     3.7    29.2    -      -       +      -
    470C  LEU*     3.8    14.5    -      -       +      +
    489C  ILE*     4.5    20.6    -      -       +      -
    492C  LEU*     4.0    17.0    -      -       +      -
    500C  TYR*     3.6    39.9    -      -       +      +
    501C  THR*     3.6    20.2    -      -       +      +
    503C  LYS*     1.3    79.0    -      -       +      +
    505C  GLN*     1.3    64.5    +      -       -      +
    507C  MET*     2.9    39.8    +      -       +      +
    508C  PHE*     2.9    13.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 505 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    489C  ILE*     4.4    19.1    -      -       +      +
    493C  LYS*     6.0     4.6    -      -       -      +
    501C  THR*     2.9    19.2    +      -       -      +
    502C  SER      3.6     3.4    -      -       -      +
    504C  LEU*     1.3    76.5    -      -       -      +
    506C  ARG*     1.3    74.9    +      -       -      +
    508C  PHE*     3.2    28.4    +      -       -      +
    509C  GLN*     2.9    35.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 506 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    498C  PHE*     4.3    22.8    -      -       -      -
    502C  SER*     2.9    47.9    +      -       -      +
    503C  LYS*     3.1     7.8    +      -       -      +
    505C  GLN*     1.3    91.3    -      -       -      +
    507C  MET*     1.3    61.9    +      -       -      +
    509C  GLN*     4.2    20.0    -      -       -      +
    510C  ASP*     2.9    33.0    +      -       -      +
    544C  SER*     3.5    24.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with MET 507 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    467C  ALA*     3.8    10.5    -      -       +      +
    470C  LEU*     3.7    11.7    -      -       +      -
    471C  ALA*     3.6    19.7    -      -       -      -
    474C  LEU*     4.2     4.7    -      -       +      -
    503C  LYS*     2.9     9.6    +      -       +      +
    504C  LEU*     2.9    41.3    +      -       +      +
    506C  ARG*     1.3    76.5    -      -       -      +
    508C  PHE*     1.3    63.6    +      -       -      +
    510C  ASP      3.2     0.5    +      -       -      -
    511C  ILE*     3.0    14.4    +      -       -      +
    544C  SER      3.8    13.9    -      -       -      +
    545C  TRP*     3.0    68.1    -      -       +      +
    546C  PRO*     3.7    15.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 508 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    470C  LEU*     6.1     0.2    -      -       +      -
    474C  LEU*     4.0    29.1    -      -       +      +
    482C  ASP*     4.4    19.7    -      -       +      -
    485C  GLU*     4.7    12.3    -      -       +      -
    486C  ALA*     4.2    30.7    -      -       +      -
    489C  ILE*     4.5    16.8    -      -       +      -
    504C  LEU      2.9    10.5    +      -       -      +
    505C  GLN*     3.2    31.2    -      -       -      +
    507C  MET*     1.3    77.8    -      -       -      +
    509C  GLN*     1.3    58.1    +      -       +      +
    511C  ILE*     3.2    24.4    -      -       +      +
    512C  GLY*     3.7     2.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 509 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    505C  GLN*     2.9    20.2    +      -       +      +
    506C  ARG*     4.2    21.8    -      -       -      +
    508C  PHE*     1.3    75.0    -      -       +      +
    510C  ASP*     1.3    66.9    +      -       +      +
    511C  ILE      3.2     0.2    -      -       -      -
    512C  GLY*     2.9    17.7    +      -       -      -
    513C  VAL*     3.0    27.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 510 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    506C  ARG      2.9    20.6    +      -       -      +
    507C  MET      3.2     0.6    +      -       -      +
    509C  GLN*     1.3    79.5    -      -       +      +
    511C  ILE*     1.3    57.4    +      -       -      +
    513C  VAL*     3.5     9.4    +      -       -      +
    514C  SER*     3.0    27.9    +      -       -      -
    539C  VAL      4.1     3.5    -      -       -      +
    540C  LEU*     3.2     6.3    -      -       -      -
    541C  SER*     2.3    48.3    +      -       -      -
    545C  TRP*     3.0    17.9    +      -       -      +
     33D  TRP*     4.8     5.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 511 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    474C  LEU*     3.5    37.0    -      -       +      +
    475C  VAL*     4.3     6.3    -      -       -      -
    507C  MET      3.0    13.1    +      -       -      +
    508C  PHE*     3.2    22.4    -      -       +      +
    510C  ASP*     1.3    75.8    -      -       -      +
    512C  GLY*     1.3    65.2    +      -       -      +
    514C  SER*     3.2     4.5    +      -       -      -
    515C  LYS*     2.9    27.0    +      -       -      +
    538C  GLN*     3.0    36.9    +      -       +      +
    540C  LEU*     3.7    24.0    -      -       +      -
    545C  TRP*     4.1     6.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 512 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    508C  PHE      3.7     2.0    +      -       -      -
    509C  GLN*     2.9     9.6    +      -       -      -
    511C  ILE*     1.3    82.3    -      -       -      +
    513C  VAL*     1.3    64.3    +      -       -      +
    515C  LYS*     3.0    17.9    +      -       -      +
    516C  ASP*     3.0    20.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 513 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    509C  GLN*     3.0    31.6    +      -       +      +
    510C  ASP*     3.9    10.5    -      -       -      +
    512C  GLY*     1.3    75.7    -      -       -      +
    514C  SER*     1.3    57.8    +      -       -      +
    516C  ASP*     3.4     9.4    +      -       +      +
    517C  LEU*     2.9    36.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 514 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    510C  ASP      3.0    15.1    +      -       -      -
    511C  ILE*     3.3    18.4    -      -       -      -
    512C  GLY      3.1     0.2    -      -       -      -
    513C  VAL*     1.3    75.1    -      -       -      +
    515C  LYS*     1.3    60.1    +      -       -      +
    517C  LEU*     3.4     6.1    +      -       -      +
    518C  ASN*     2.9    30.1    +      -       -      +
    537C  ILE      4.1     1.5    +      -       -      +
    538C  GLN*     3.0    13.6    -      -       -      -
    539C  VAL*     2.6    47.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 515 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    511C  ILE      2.9    13.3    +      -       -      +
    512C  GLY*     3.0    10.5    +      -       -      +
    514C  SER*     1.3    75.4    -      -       -      +
    516C  ASP*     1.3    65.3    +      -       -      +
    518C  ASN*     3.3     8.6    +      -       -      +
    519C  GLU*     3.0    22.0    +      -       -      +
    538C  GLN*     4.8    14.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 516 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    512C  GLY      3.0    18.9    +      -       -      +
    513C  VAL*     3.8    12.0    -      -       +      +
    515C  LYS*     1.3    78.0    -      -       -      +
    517C  LEU*     1.3    57.0    +      -       -      +
    519C  GLU*     3.1    14.2    +      -       -      +
    520C  GLN*     2.9    26.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 517 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    513C  VAL*     2.9    24.5    +      -       +      +
    514C  SER*     3.7     6.3    -      -       -      +
    516C  ASP*     1.3    77.2    -      -       -      +
    518C  ASN*     1.3    64.6    +      -       -      +
    520C  GLN*     3.0    17.1    +      -       +      +
    521C  PHE*     2.9    21.5    +      -       +      +
    537C  ILE*     6.5     0.4    -      -       +      -
    539C  VAL*     4.6    21.1    -      -       +      -
    566C  PHE*     5.2    13.2    -      -       +      -
    569C  PHE*     4.9    17.4    -      -       +      -
    573C  ARG*     5.1    19.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 518 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    514C  SER      2.9    17.0    +      -       -      +
    515C  LYS*     3.5     8.4    +      -       -      +
    517C  LEU*     1.3    80.4    -      -       -      +
    519C  GLU*     1.3    58.8    +      -       -      +
    521C  PHE*     3.1    12.1    +      -       -      +
    522C  LYS*     2.9    40.9    +      -       -      +
    535C  PHE*     3.7    14.6    +      -       -      +
    536C  SER*     3.5    10.2    -      -       -      +
    537C  ILE*     2.8    50.8    +      -       -      +
    538C  GLN*     6.0     1.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 519 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    515C  LYS      3.0    12.8    +      -       -      +
    516C  ASP*     3.5    16.1    -      -       -      +
    518C  ASN*     1.3    78.8    -      -       -      +
    520C  GLN*     1.3    58.7    +      -       -      +
    522C  LYS*     2.8    35.2    +      -       +      +
    523C  LYS*     3.0    13.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 520 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    516C  ASP      2.9    12.3    +      -       -      +
    517C  LEU*     3.0    18.8    +      -       +      +
    519C  GLU*     1.3    75.1    -      -       -      +
    521C  PHE*     1.3    57.9    +      -       -      +
    523C  LYS*     3.3     8.6    +      -       +      +
    524C  HIS*     2.9    28.8    +      -       +      +
    569C  PHE*     4.5    22.5    -      -       +      -
    573C  ARG*     4.8    16.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 521 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    517C  LEU*     2.9    13.8    +      -       +      +
    518C  ASN*     3.3    19.1    -      -       -      +
    520C  GLN*     1.3    76.5    -      -       -      +
    522C  LYS*     1.3    60.8    +      -       +      +
    524C  HIS*     4.4    11.7    -      -       +      -
    525C  LEU*     2.9    39.7    +      -       +      +
    535C  PHE*     4.1    36.6    -      +       -      -
    562C  SER*     5.7     1.3    -      -       -      -
    565C  ARG*     5.2     6.7    -      -       +      -
    566C  PHE*     4.2    38.1    -      +       +      -
    569C  PHE*     4.4    35.5    -      +       +      -
----------------------------------------------------------
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Residues in contact with LYS 522 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    518C  ASN*     2.9    31.6    +      -       -      +
    519C  GLU*     2.8    25.8    +      -       +      +
    521C  PHE*     1.3    76.8    -      -       +      +
    523C  LYS*     1.3    62.8    +      -       -      +
    525C  LEU*     3.0    22.0    +      -       -      +
    526C  THR*     3.9     5.7    +      -       -      +
    534C  ASP*     5.0     9.0    -      -       -      -
    535C  PHE      4.2    14.1    -      -       -      +
    536C  SER*     4.8     8.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 523 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    519C  GLU*     3.0    10.9    +      -       +      +
    520C  GLN*     3.3    11.0    +      -       +      +
    522C  LYS*     1.3    76.7    -      -       -      +
    524C  HIS*     1.3    60.5    +      -       -      +
    525C  LEU      3.3     0.9    +      -       -      -
    526C  THR*     3.5    21.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 524 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    520C  GLN*     2.9    18.5    +      -       +      +
    521C  PHE*     3.7    13.4    -      -       +      +
    523C  LYS*     1.3    73.4    -      -       -      +
    525C  LEU*     1.3    64.9    +      -       -      +
    526C  THR      3.1     4.8    +      -       -      -
    527C  ASN*     3.8    23.6    +      -       +      +
    569C  PHE*     4.2    37.8    -      +       +      +
    572C  SER*     5.7     2.4    +      -       -      -
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


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

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

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