Contacts of the helix formed by residues 548 - 578 (chain F) in PDB entry 1GO4


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 548 (chain F).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     64B  TYR*     3.9    10.8    -      -       +      -
    152B  ASP*     3.2    35.8    +      -       -      +
    544F  HIS*     3.6     9.7    +      -       -      -
    545F  MET      3.0    21.4    +      -       -      +
    546F  SER      3.8     6.3    +      -       -      -
    547F  LEU*     1.3    75.0    -      -       -      +
    549F  PRO*     1.3    75.2    -      -       +      +
    550F  THR*     2.8    34.2    +      -       -      -
    551F  SER*     2.9    17.3    +      -       -      +
    552F  VAL*     2.9    26.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with PRO 549 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     38B  TYR*     4.1     5.4    -      -       -      +
     61B  LEU*     3.9    15.0    -      -       +      -
     64B  TYR*     3.3    41.5    -      -       +      -
    150B  SER*     3.2    14.9    +      -       -      +
    151B  PHE*     3.5    31.4    -      -       +      +
    548F  ASN*     1.3    88.5    -      -       +      +
    550F  THR*     1.3    56.5    +      -       -      +
    552F  VAL*     3.7     6.8    -      -       +      +
    553F  ALA*     3.0    26.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 550 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     87B  VAL      4.9     0.3    +      -       -      -
     89B  SER*     3.9    19.6    +      -       -      +
     91B  ILE*     6.0     2.0    -      -       +      -
     94B  GLY*     6.6     0.4    -      -       -      -
    150B  SER*     3.4    13.1    +      -       -      -
    151B  PHE*     2.8    35.3    +      -       -      -
    152B  ASP*     3.7     7.1    +      -       +      +
    173B  GLN*     6.4     0.2    -      -       -      +
    548F  ASN*     2.8    15.3    +      -       -      -
    549F  PRO*     1.3    72.4    -      -       -      +
    551F  SER*     1.3    65.0    +      -       -      +
    553F  ALA*     3.3     1.4    +      -       -      +
    554F  ARG*     2.9    43.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 551 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    546F  SER      3.3    17.6    +      -       -      -
    547F  LEU*     3.6     7.8    -      -       -      +
    548F  ASN*     2.9    35.2    +      -       -      -
    550F  THR*     1.3    77.4    -      -       -      +
    552F  VAL*     1.3    59.8    +      -       -      +
    554F  ARG*     3.7     7.2    -      -       -      +
    555F  GLN*     2.9    31.1    +      -       -      +
    558F  ARG*     5.1     1.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 552 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     60B  GLU*     6.3     3.8    -      -       +      -
    547F  LEU*     5.0    10.8    -      -       +      -
    548F  ASN      2.9    29.2    +      -       -      +
    549F  PRO*     3.7     7.2    -      -       +      +
    551F  SER*     1.3    80.1    +      -       -      +
    553F  ALA*     1.3    63.5    +      -       +      +
    555F  GLN*     3.2     8.3    +      -       -      +
    556F  ARG*     3.0    61.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 553 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91B  ILE*     3.6    35.2    -      -       +      -
    150B  SER*     4.4     3.6    -      -       -      +
    549F  PRO      3.0    18.9    +      -       -      +
    550F  THR      3.9     2.7    -      -       -      +
    552F  VAL*     1.3    77.8    -      -       -      +
    554F  ARG*     1.3    63.2    +      -       -      +
    556F  ARG*     3.3    11.2    +      -       -      +
    557F  LEU*     3.1    24.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 554 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91B  ILE*     3.0    27.7    +      -       +      +
     92B  GLU      2.8    30.1    +      -       -      -
     93B  SER      3.8     2.0    +      -       -      -
     94B  GLY*     3.8    19.3    -      -       -      +
     95C  GLU*     3.3    34.5    +      -       -      -
    177C  ASN*     6.0     2.2    -      -       -      +
    550F  THR*     2.9    40.3    +      -       +      +
    551F  SER*     3.7     6.7    -      -       -      +
    553F  ALA*     1.3    75.4    -      -       -      +
    555F  GLN*     1.3    63.1    +      -       -      +
    557F  LEU*     3.0    10.3    +      -       -      +
    558F  ARG*     3.0    40.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 555 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    551F  SER      2.9    18.2    +      -       -      +
    552F  VAL*     3.4     7.6    -      -       -      +
    554F  ARG*     1.3    77.8    -      -       -      +
    556F  ARG*     1.3    57.6    +      -       +      +
    558F  ARG*     3.1    42.2    +      -       -      +
    559F  GLU*     2.9    53.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 556 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     60B  GLU*     5.3    10.7    -      -       -      +
    552F  VAL*     3.0    42.1    +      -       +      +
    553F  ALA*     3.7    11.5    -      -       -      +
    554F  ARG      3.3     0.2    -      -       -      -
    555F  GLN*     1.3    78.0    -      -       +      +
    557F  LEU*     1.3    57.2    +      -       -      +
    559F  GLU*     3.3    15.4    +      -       -      +
    560F  ASP*     2.7    41.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 557 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91B  ILE*     3.4    30.3    -      -       +      +
     92B  GLU*     3.6    50.0    -      -       +      +
    553F  ALA      3.1    14.0    +      -       -      +
    554F  ARG*     3.0    11.5    +      -       -      +
    556F  ARG*     1.3    76.9    -      -       +      +
    558F  ARG*     1.3    63.9    +      -       +      +
    560F  ASP*     3.2    16.8    +      -       +      +
    561F  HIS*     3.0    23.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 558 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    551F  SER      5.1     1.0    +      -       -      -
    554F  ARG*     3.0    26.0    +      -       -      +
    555F  GLN*     3.1    61.9    +      -       -      +
    557F  LEU*     1.3    78.5    -      -       +      +
    559F  GLU*     1.3    57.4    +      -       -      +
    561F  HIS*     3.4     6.1    +      -       -      +
    562F  SER*     3.0    31.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 559 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    555F  GLN*     2.9    46.3    +      -       -      +
    556F  ARG*     3.8    16.6    -      -       -      +
    557F  LEU      3.2     0.2    -      -       -      -
    558F  ARG*     1.3    74.8    -      -       -      +
    560F  ASP*     1.3    62.5    +      -       -      +
    562F  SER*     4.1     5.9    -      -       -      +
    563F  GLN*     3.1    29.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 560 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    556F  ARG*     2.7    29.8    +      -       -      +
    557F  LEU*     3.2    17.8    +      -       +      +
    559F  GLU*     1.3    80.7    -      -       -      +
    561F  HIS*     1.3    58.7    +      -       -      +
    563F  GLN*     3.5    14.0    +      -       -      +
    564F  LEU*     3.1    26.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 561 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     92C  GLU*     2.8    36.8    +      -       +      +
    147C  VAL*     5.6    10.3    -      -       +      +
    557F  LEU      3.0    15.2    +      -       -      +
    558F  ARG*     3.9     5.8    -      -       -      +
    560F  ASP*     1.3    76.6    -      -       -      +
    562F  SER*     1.3    61.9    +      -       -      +
    564F  LEU*     3.3    14.7    +      -       +      +
    565F  GLN*     3.0    63.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 562 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    558F  ARG*     3.0    17.1    +      -       -      +
    559F  GLU*     4.1     6.1    -      -       -      -
    561F  HIS*     1.3    75.5    +      -       -      +
    563F  GLN*     1.3    61.1    +      -       -      +
    565F  GLN*     3.8    15.0    +      -       -      +
    566F  ALA*     2.9    29.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 563 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    559F  GLU      3.1    19.6    +      -       -      +
    560F  ASP*     3.7    14.4    -      -       -      +
    562F  SER*     1.3    77.4    -      -       -      +
    564F  LEU*     1.3    58.7    +      -       -      +
    566F  ALA*     3.3     6.7    -      -       +      +
    567F  GLU*     3.0    52.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 564 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     92C  GLU*     6.0     1.6    -      -       -      +
    561E  HIS*     5.4    15.0    -      -       +      +
    564E  LEU*     6.0     2.9    -      -       +      -
    560F  ASP      3.1    17.9    +      -       -      +
    561F  HIS*     3.5    16.6    -      -       +      +
    563F  GLN*     1.3    76.1    -      -       -      +
    565F  GLN*     1.3    70.2    +      -       +      +
    567F  GLU*     3.4     6.6    +      -       +      +
    568F  CYS*     3.1    40.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 565 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    146C  GLU      6.0     0.2    +      -       -      -
    561F  HIS*     3.0    50.1    +      -       +      +
    562F  SER*     3.8    14.9    +      -       -      +
    563F  GLN      3.4     0.2    -      -       -      -
    564F  LEU*     1.3    80.2    -      -       +      +
    566F  ALA*     1.3    58.5    +      -       -      +
    568F  CYS*     3.4     5.4    +      -       -      +
    569F  GLU*     3.0    34.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 566 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    562F  SER      2.9    18.5    +      -       -      +
    563F  GLN*     3.3    11.2    -      -       +      +
    564F  LEU      3.1     0.2    -      -       -      -
    565F  GLN*     1.3    74.2    -      -       -      +
    567F  GLU*     1.3    68.6    +      -       +      +
    569F  GLU*     3.2     7.7    +      -       -      +
    570F  ARG*     3.0    23.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 567 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    563F  GLN*     3.0    38.8    +      -       +      +
    564F  LEU*     3.9     9.0    -      -       +      +
    566F  ALA*     1.3    75.8    -      -       -      +
    568F  CYS*     1.3    59.3    -      -       -      +
    570F  ARG*     3.2    19.4    +      -       -      +
    571F  LEU*     2.8    34.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with CYS 568 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    564E  LEU*     4.1    24.7    -      -       -      -
    564F  LEU*     3.1    36.6    +      -       -      +
    565F  GLN*     3.7     6.5    -      -       -      +
    567F  GLU*     1.3    81.3    -      -       -      +
    569F  GLU*     1.3    56.9    +      -       -      +
    571F  LEU*     3.9     9.8    -      -       -      +
    572F  ARG*     3.0    31.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 569 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    565F  GLN*     3.0    19.5    +      -       -      +
    566F  ALA*     3.7     6.4    -      -       -      +
    568F  CYS*     1.3    76.9    -      -       -      +
    570F  ARG*     1.3    58.4    +      -       -      +
    572F  ARG*     2.9    32.4    -      -       +      +
    573F  GLY*     3.1     6.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 570 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    566F  ALA      3.0    16.2    +      -       -      +
    567F  GLU*     3.6    17.8    +      -       -      +
    569F  GLU*     1.3    73.1    -      -       -      +
    571F  LEU*     1.3    69.5    +      -       -      +
    572F  ARG      2.9     1.1    -      -       -      -
    573F  GLY*     2.8    12.9    +      -       -      -
    574F  LEU*     3.1    34.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 571 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    564E  LEU*     5.5     5.8    -      -       +      -
    568E  CYS*     4.3    23.1    -      -       -      -
    571E  LEU*     5.6     4.7    -      -       +      -
    567F  GLU      2.8    20.1    +      -       -      +
    568F  CYS*     3.9     9.2    -      -       -      +
    570F  ARG*     1.3    76.5    -      -       -      +
    572F  ARG*     1.3    62.4    +      -       -      +
    574F  LEU*     3.3    17.1    +      -       +      +
    575F  LEU*     3.1    53.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 572 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    568F  CYS      3.0    17.1    +      -       -      +
    569F  GLU*     2.9    30.4    -      -       +      +
    571F  LEU*     1.3    78.2    -      -       -      +
    573F  GLY*     1.3    59.2    +      -       -      +
    575F  LEU*     3.8     8.8    +      -       -      +
    576F  ARG*     3.3    22.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 573 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    569F  GLU      3.1     5.6    +      -       -      -
    570F  ARG*     2.8    14.5    +      -       -      -
    572F  ARG*     1.3    73.2    -      -       -      +
    574F  LEU*     1.3    56.3    +      -       -      -
    576F  ARG*     2.9     9.9    +      -       -      +
    577F  ALA*     2.7    37.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 574 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    570F  ARG*     3.1    35.8    +      -       +      +
    571F  LEU*     3.5    19.1    -      -       +      +
    573F  GLY*     1.3    76.0    -      -       -      +
    575F  LEU*     1.3    67.0    +      -       +      +
    576F  ARG      2.9     0.9    +      -       -      -
    577F  ALA*     3.0     5.0    +      -       +      +
    578F  MET*     2.8    37.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 575 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    571E  LEU*     3.9    27.4    -      -       +      -
    571F  LEU*     3.1    40.7    +      -       +      +
    572F  ARG*     4.0     7.6    -      -       -      +
    574F  LEU*     1.3    78.5    -      -       +      +
    576F  ARG*     1.3    60.5    +      -       -      +
    578F  MET*     3.3    24.8    -      -       -      +
    579F  GLU      4.7     1.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 576 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    572F  ARG*     3.3    14.1    +      -       -      +
    573F  GLY*     2.9    13.1    +      -       -      +
    574F  LEU      2.9     0.8    +      -       -      -
    575F  LEU*     1.3    78.1    -      -       -      +
    577F  ALA*     1.3    68.9    +      -       -      +
    578F  MET      3.4     0.3    +      -       -      -
    579F  GLU      3.7    15.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 577 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    573F  GLY      2.7    19.9    +      -       -      +
    574F  LEU*     3.8     4.5    -      -       +      +
    576F  ARG*     1.3    77.2    -      -       -      +
    578F  MET*     1.3    52.7    +      -       -      +
    579F  GLU*     2.7    17.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with MET 578 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    575E  LEU*     6.2     4.7    -      -       -      -
    574F  LEU*     2.8    25.9    +      -       +      +
    575F  LEU*     3.3    16.9    -      -       -      +
    576F  ARG      3.3     0.2    -      -       -      -
    577F  ALA*     1.3    74.4    -      -       -      +
    579F  GLU*     1.3    73.0    +      -       +      +
----------------------------------------------------------
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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