Contacts of the helix formed by residues 84 - 111 (chain H) in PDB entry 1ZMC


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 84 (chain H).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     75G  GLY*     2.9    20.1    +      -       -      +
     77G  GLU*     2.6    38.2    +      -       -      +
     82H  ARG      3.6     0.4    +      -       -      -
     83H  LEU*     1.3    72.6    -      -       -      +
     85H  LEU*     1.3    62.5    +      -       -      +
     86H  ASP*     3.0    14.4    +      -       -      +
     87H  LYS*     3.0    36.6    +      -       -      +
     88H  MET*     3.0    12.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 85 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     56H  LEU*     6.0     0.2    -      -       +      -
     83H  LEU*     3.5    20.3    +      -       +      +
     84H  ASN*     1.3    73.8    -      -       -      +
     86H  ASP*     1.3    60.7    -      -       -      +
     88H  MET*     3.9    10.8    -      -       +      -
     89H  MET*     3.1    39.8    +      -       +      +
    174H  LEU      3.9     9.4    -      -       -      +
    175H  LYS      4.0     4.5    -      -       -      +
    176H  LYS*     3.5    43.5    -      -       -      +
    177H  VAL*     3.9     6.3    -      -       +      +
    197H  TRP*     4.0    24.5    -      -       +      -
    200H  LEU*     4.3    13.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 86 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     84H  ASN*     3.0    10.6    +      -       -      +
     85H  LEU*     1.3    77.0    -      -       -      +
     87H  LYS*     1.3    65.0    +      -       -      +
     89H  MET*     3.4     5.7    +      -       -      +
     90H  GLU*     3.2    21.0    +      -       -      +
    175H  LYS*     5.1     8.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 87 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     72G  ALA*     3.5    21.0    +      -       -      +
     73G  SER*     3.4    37.4    -      -       -      +
     75G  GLY*     3.7     8.7    -      -       -      +
     77G  GLU*     5.6     0.9    -      -       -      +
     84H  ASN*     3.0    30.6    +      -       -      +
     86H  ASP*     1.3    74.9    -      -       -      +
     88H  MET*     1.3    65.1    +      -       -      +
     90H  GLU*     3.1    41.4    +      -       -      +
     91H  GLN      3.2    11.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 88 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     74G  ARG*     2.9    27.7    +      -       -      +
     75G  GLY*     4.2     0.9    -      -       -      +
     76G  ILE*     5.4     1.3    -      -       -      -
     56H  LEU*     4.1    19.3    -      -       +      +
     59H  ASN*     3.4    35.4    +      -       +      +
     60H  SER*     3.6    25.1    -      -       -      +
     63H  TYR*     5.1     2.7    -      -       -      -
     83H  LEU*     3.9    18.2    -      -       +      -
     84H  ASN      3.0    15.5    +      -       -      +
     85H  LEU*     3.9    10.8    -      -       +      +
     87H  LYS*     1.3    80.2    -      -       -      +
     89H  MET*     1.3    60.1    +      -       -      +
     90H  GLU      3.5     0.2    +      -       -      -
     91H  GLN      3.7     0.3    +      -       -      -
     92H  LYS*     3.6     9.5    +      -       -      +
    196H  VAL*     5.5     0.2    -      -       +      -
    200H  LEU*     3.6    35.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 89 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     56H  LEU*     3.9    15.7    -      -       +      -
     85H  LEU*     3.1    32.4    +      -       +      +
     86H  ASP*     3.9     5.8    -      -       -      +
     87H  LYS      3.2     0.2    -      -       -      -
     88H  MET*     1.3    74.0    -      -       -      +
     90H  GLU*     1.3    61.4    +      -       -      +
     92H  LYS*     3.3    37.2    +      -       -      +
     93H  SER*     3.0    31.6    +      -       -      +
    172H  LEU      3.4    13.0    -      -       -      +
    173H  SER*     3.9    14.1    -      -       -      -
    174H  LEU      3.9     8.1    -      -       -      +
    197H  TRP*     3.7    34.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 90 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     86H  ASP      3.2    12.1    +      -       -      +
     87H  LYS*     3.1    39.3    +      -       -      +
     89H  MET*     1.3    75.3    -      -       -      +
     91H  GLN*     1.3    65.5    +      -       -      +
     93H  SER*     2.9     8.2    +      -       -      +
     94H  THR*     2.8    35.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 91 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     73G  SER*     3.6    26.2    +      -       -      +
     74G  ARG*     4.2    11.0    -      -       +      +
    395G  LYS      4.7     0.8    +      -       -      -
    396G  THR      3.0    24.3    +      -       -      +
    398G  ALA*     3.8    21.2    -      -       +      +
     55H  ALA*     3.7    12.3    -      -       -      +
     59H  ASN*     2.8    42.6    +      -       -      +
     87H  LYS*     3.2     7.9    +      -       -      +
     88H  MET      3.9     2.5    -      -       -      +
     90H  GLU*     1.3    75.3    -      -       -      +
     92H  LYS*     1.3    63.6    +      -       -      +
     94H  THR*     3.5     7.9    +      -       -      -
     95H  ALA*     3.2    21.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 92 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     52H  PRO*     3.8    39.1    -      -       +      +
     55H  ALA*     4.0    13.0    -      -       +      +
     56H  LEU*     3.7    24.9    -      -       +      -
     88H  MET      3.6     9.3    +      -       -      +
     89H  MET*     3.3    32.6    +      -       -      +
     90H  GLU      3.0     0.2    -      -       -      -
     91H  GLN*     1.3    88.1    +      -       -      +
     93H  SER*     1.3    70.5    +      -       -      +
     95H  ALA*     3.2     6.1    +      -       -      +
     96H  VAL*     3.1    26.2    +      -       +      +
    172H  LEU*     2.6    27.5    +      -       -      +
    173H  SER*     3.3    13.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 93 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     89H  MET*     3.0    14.1    +      -       -      +
     90H  GLU*     2.9    12.1    +      -       -      -
     92H  LYS*     1.3    83.2    +      -       -      +
     94H  THR*     1.3    60.8    +      -       -      +
     96H  VAL*     3.2     8.4    +      -       -      +
     97H  LYS*     2.8    34.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 94 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    395G  LYS*     6.5     0.4    -      -       -      -
     90H  GLU*     2.8    29.1    +      -       -      +
     91H  GLN*     3.7     8.8    -      -       -      -
     93H  SER*     1.3    78.3    -      -       -      +
     95H  ALA*     1.3    56.4    +      -       -      +
     97H  LYS*     3.6     9.4    -      -       +      +
     98H  ALA*     2.9    31.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 95 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    395G  LYS*     4.0    24.4    -      -       -      +
    396G  THR*     4.0    24.5    -      -       +      +
     51H  ILE*     4.7     4.3    -      -       +      -
     91H  GLN*     3.2    12.2    +      -       -      +
     92H  LYS*     3.2    11.3    +      -       -      +
     94H  THR*     1.3    80.6    -      -       -      +
     96H  VAL*     1.3    62.6    +      -       -      +
     98H  ALA*     3.3     5.9    +      -       -      +
     99H  LEU*     2.9    30.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 96 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46H  LEU*     3.3    37.2    -      -       +      +
     47H  ASN*     4.0    24.0    -      -       -      +
     51H  ILE*     4.1    11.0    -      -       +      -
     52H  PRO*     4.3    17.7    -      -       +      -
     92H  LYS*     3.1    19.9    +      -       +      +
     93H  SER*     3.2     8.7    +      -       -      +
     95H  ALA*     1.3    73.8    -      -       -      +
     97H  LYS*     1.3    55.9    +      -       -      +
     99H  LEU*     3.1     3.3    +      -       -      +
    100H  THR*     2.8    40.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 97 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    262A  SER*     4.6     8.3    +      -       -      -
    263A  GLY*     3.0    43.6    +      -       -      +
    265A  LYS*     5.2     4.2    -      -       -      +
     93H  SER*     2.8    18.9    +      -       -      +
     94H  THR*     3.6     9.4    -      -       +      +
     96H  VAL*     1.3    77.0    -      -       -      +
     98H  ALA*     1.3    63.2    +      -       -      +
    100H  THR*     2.8    22.9    +      -       -      +
    101H  GLY*     2.9     9.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 98 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    395G  LYS*     3.7    29.4    -      -       -      -
     94H  THR*     2.9    21.6    +      -       +      +
     95H  ALA      3.7     4.3    -      -       -      +
     97H  LYS*     1.3    78.7    -      -       -      +
     99H  LEU*     1.3    58.0    +      -       -      +
    101H  GLY*     3.2     3.0    +      -       -      -
    102H  GLY*     2.9    24.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 99 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    390G  ALA*     5.2     8.5    -      -       -      +
    391G  ASN      5.2     0.2    -      -       -      +
    392G  SER*     4.1    27.1    -      -       -      +
    395G  LYS*     4.0    28.9    -      -       +      -
    396G  THR*     4.1    12.1    -      -       -      +
     46H  LEU*     3.4    22.6    -      -       +      +
     51H  ILE*     4.0    23.6    -      -       +      -
     95H  ALA      2.9    18.3    +      -       -      +
     98H  ALA*     1.3    75.0    -      -       -      +
    100H  THR*     1.3    65.2    +      -       -      +
    102H  GLY*     3.3     4.4    +      -       -      +
    103H  ILE*     3.2    25.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 100 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     40H  THR*     3.9    19.6    -      -       +      +
     41H  LEU*     3.4    25.4    -      -       -      +
     46H  LEU*     3.6    15.5    -      -       +      -
     47H  ASN*     3.5    20.0    -      -       -      +
     96H  VAL*     2.8    25.7    +      -       +      +
     97H  LYS*     2.8    27.0    +      -       -      +
     99H  LEU*     1.3    68.6    -      -       -      +
    101H  GLY*     1.3    65.4    +      -       -      +
    103H  ILE*     3.0    17.2    +      -       -      +
    104H  ALA*     3.2    10.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 101 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     97H  LYS      2.9    15.1    +      -       -      -
     98H  ALA*     3.6     4.3    -      -       -      -
    100H  THR*     1.3    78.6    +      -       -      +
    102H  GLY*     1.3    56.0    +      -       -      +
    104H  ALA*     3.2    10.5    +      -       -      +
    105H  HIS*     3.0    28.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 102 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98H  ALA      2.9    13.9    +      -       -      -
     99H  LEU*     3.3     7.8    +      -       -      -
    100H  THR      3.1     0.4    -      -       -      -
    101H  GLY*     1.3    74.5    -      -       -      +
    103H  ILE*     1.3    64.5    +      -       -      +
    105H  HIS*     3.4     7.2    +      -       -      +
    106H  LEU*     3.0    34.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 103 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    473G  ASN*     5.1     0.4    -      -       -      +
     19H  TYR*     3.6    63.9    -      -       +      +
     41H  LEU*     3.6    30.7    -      -       +      -
     42H  GLY*     4.4     2.7    -      -       -      -
     46H  LEU*     4.0    18.4    -      -       +      -
     99H  LEU      3.2    15.6    +      -       -      +
    100H  THR*     3.0     9.2    +      -       -      +
    102H  GLY*     1.3    75.6    -      -       -      +
    104H  ALA*     1.3    65.2    +      -       -      +
    106H  LEU*     3.0    11.5    +      -       +      +
    107H  PHE*     2.9    29.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 104 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41H  LEU*     3.7    17.9    -      -       +      +
    100H  THR      3.2     7.6    +      -       -      +
    101H  GLY*     3.2    13.0    +      -       -      +
    103H  ILE*     1.3    79.7    -      -       -      +
    105H  HIS*     1.3    57.7    +      -       -      +
    107H  PHE*     3.3     5.1    +      -       -      +
    108H  LYS*     3.0    29.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 105 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101H  GLY      3.0    16.1    +      -       -      +
    102H  GLY*     3.8     8.3    -      -       -      +
    103H  ILE      3.2     0.2    -      -       -      -
    104H  ALA*     1.3    78.1    -      -       -      +
    106H  LEU*     1.3    60.3    +      -       -      +
    108H  LYS*     3.5    26.7    +      -       +      +
    109H  GLN*     2.9    54.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 106 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    472G  ILE      4.1     7.4    -      -       -      +
    473G  ASN*     3.5    55.6    -      -       +      +
    474G  PHE*     3.7    15.3    -      -       +      +
     19H  TYR*     4.9     1.8    -      -       +      -
     23H  ILE*     4.2    18.8    -      -       +      -
    102H  GLY*     3.0    25.4    +      -       -      +
    103H  ILE*     3.0    10.1    +      -       +      +
    105H  HIS*     1.3    76.5    -      -       +      +
    107H  PHE*     1.3    62.5    +      -       -      +
    109H  GLN*     3.7    14.8    -      -       -      +
    110H  ASN*     2.8    38.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 107 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     14H  SER*     4.8     0.4    -      -       -      -
     19H  TYR*     3.4    49.6    -      -       +      -
     22H  ALA*     4.0     8.5    -      -       +      -
     23H  ILE*     4.0    12.3    -      -       +      -
     34H  CYS*     3.9    32.5    -      -       +      -
     41H  LEU*     4.0    31.6    -      -       +      -
    103H  ILE*     2.9    14.5    +      -       +      +
    104H  ALA*     3.5     9.6    -      -       -      +
    106H  LEU*     1.3    73.4    -      -       -      +
    108H  LYS*     1.3    65.5    +      -       -      +
    110H  ASN      3.0     1.9    +      -       -      -
    111H  LYS      2.9     4.3    +      -       -      -
    112H  VAL*     2.8    53.3    +      -       +      +
    114H  HIS*     4.4    16.8    -      +       +      -
----------------------------------------------------------
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Residues in contact with LYS 108 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    104H  ALA      3.0    16.0    +      -       -      +
    105H  HIS*     3.7    26.9    +      -       +      +
    107H  PHE*     1.3    76.9    -      -       -      +
    109H  GLN*     1.3    65.7    +      -       -      +
    111H  LYS*     3.1    20.5    +      -       -      +
    112H  VAL      4.6     3.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 109 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    474G  PHE*     3.2    34.8    +      -       -      +
     27H  GLN*     6.1     0.2    -      -       -      +
    105H  HIS*     2.9    41.5    +      -       +      +
    106H  LEU*     3.7    10.8    -      -       -      +
    108H  LYS*     1.3    82.5    -      -       -      +
    110H  ASN*     1.3    72.1    +      -       -      +
    111H  LYS*     3.7     8.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 110 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    470G  LYS*     5.0     5.2    +      -       -      +
    472G  ILE      5.0     0.6    +      -       -      -
    474G  PHE      5.6     0.8    +      -       -      -
     23H  ILE*     3.8    24.2    -      -       +      +
     26H  ALA*     3.3    21.9    -      -       +      +
     27H  GLN*     3.4    28.8    +      -       -      +
    106H  LEU*     2.8    34.2    +      -       -      +
    107H  PHE*     3.0     2.6    +      -       -      +
    109H  GLN*     1.3    95.9    +      -       -      +
    111H  LYS*     1.3    72.2    -      -       -      +
    112H  VAL*     3.2    11.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 111 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     26H  ALA*     5.0     1.8    -      -       +      +
     31H  LYS*     5.8     0.3    -      -       -      -
     32H  THR      4.0     8.3    +      -       -      +
    107H  PHE      2.9     3.5    +      -       -      -
    108H  LYS*     3.1    17.5    +      -       -      +
    109H  GLN      4.1     8.1    -      -       -      +
    110H  ASN*     1.3    82.2    -      -       -      +
    112H  VAL*     1.3    63.2    +      -       -      +
    113H  VAL*     3.4     8.3    +      -       -      +
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


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

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

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