Contacts of the helix formed by residues 92 - 115 (chain A) in PDB entry 1ORR


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 92 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     88A  THR*     2.6    19.9    +      -       +      +
     89A  SER      3.6     2.7    -      -       -      -
     91A  ASP*     1.3    78.4    -      -       +      +
     93A  PRO*     1.3    65.7    -      -       -      +
     94A  CYS*     4.0     2.3    +      -       -      +
     95A  MET*     3.3    43.2    +      -       +      +
     96A  ASP*     3.2    16.6    +      -       -      +
     63B  ASN*     2.9    23.7    +      -       -      +
     64B  ASP*     5.4     1.2    +      -       -      -
     67B  ARG*     3.3    38.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with PRO 93 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     89A  SER      3.2    17.4    -      -       -      +
     90A  ILE      3.7     5.2    -      -       -      +
     91A  ASP      3.6     7.0    -      -       -      +
     92A  ASN*     1.3    85.6    -      -       -      +
     94A  CYS*     1.3    64.0    +      -       +      +
     96A  ASP*     3.3     6.6    +      -       +      +
     97A  PHE*     2.9    25.5    +      -       -      +
    164A  PRO*     4.1    17.1    -      -       +      +
     67B  ARG*     5.5     0.2    -      -       -      +
    105C  LEU*     5.8     1.2    -      -       -      +
    109C  GLU*     3.6    19.5    -      -       -      +
    112C  ARG*     3.9    16.4    -      -       -      +
    175C  TYR*     5.1     2.5    +      -       +      -
    179C  TYR*     3.5    18.4    -      -       +      +
    183C  PHE*     3.9    14.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with CYS 94 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     92A  ASN*     3.3     1.7    -      -       -      +
     93A  PRO*     1.3    80.5    -      -       -      +
     95A  MET*     1.3    62.3    +      -       -      +
     97A  PHE*     3.3     8.4    +      -       -      +
     98A  GLU*     3.0    50.1    +      -       -      +
     63B  ASN*     3.7    32.3    -      -       -      +
     62C  LYS*     4.8    19.5    -      -       -      +
    105C  LEU*     6.4     0.9    -      -       -      -
    109C  GLU*     4.0    22.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with MET 95 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     60A  ARG*     4.1    13.2    -      -       -      +
     83A  GLN*     4.1    11.2    -      -       +      -
     88A  THR*     3.5    30.7    -      -       +      -
     92A  ASN*     3.3    37.4    +      -       +      +
     94A  CYS*     1.3    78.0    -      -       -      +
     96A  ASP*     1.3    62.7    +      -       -      +
     98A  GLU*     3.3    10.4    +      -       -      +
     99A  ILE*     3.0    44.2    +      -       +      +
     63B  ASN*     3.8     5.3    -      -       -      +
     64B  ASP*     4.4    11.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 96 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     83A  GLN*     2.7    35.7    +      -       +      +
     89A  SER*     3.6    21.7    -      -       -      -
     92A  ASN      3.2    11.0    +      -       -      +
     93A  PRO*     3.6     8.2    -      -       +      +
     94A  CYS      3.2     0.2    -      -       -      -
     95A  MET*     1.3    82.5    -      -       -      +
     97A  PHE*     1.3    57.0    +      -       -      +
    100A  ASN*     2.9    47.3    +      -       -      +
    164A  PRO*     2.9    19.9    -      -       -      +
    165A  TYR*     3.8     3.2    -      -       -      -
    168A  SER*     2.6    25.2    +      -       -      -
    175C  TYR*     4.2     1.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 97 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     93A  PRO      2.9    17.6    +      -       -      +
     94A  CYS*     3.6     7.6    -      -       -      +
     96A  ASP*     1.3    78.8    -      -       -      +
     98A  GLU*     1.3    71.7    +      -       +      +
    101A  VAL*     2.8    48.5    +      -       +      +
    102A  GLY*     3.1     8.3    +      -       -      -
    168A  SER*     4.2     2.7    -      -       -      -
     97C  PHE*     3.8    23.8    -      +       -      -
    101C  VAL*     3.5    28.3    -      -       +      -
    102C  GLY*     4.6    12.1    -      -       -      -
    105C  LEU*     4.1    25.8    -      -       +      -
    175C  TYR*     3.6    32.1    -      +       +      +
----------------------------------------------------------
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Residues in contact with GLU 98 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     60A  ARG*     3.7    29.4    +      -       +      +
     94A  CYS*     3.0    41.7    +      -       -      +
     95A  MET*     3.7     7.7    -      -       -      +
     97A  PHE*     1.3    87.7    -      -       +      +
     99A  ILE*     1.3    58.6    +      -       -      +
    102A  GLY*     3.2     9.1    -      -       -      +
    103A  GLY      2.8    24.6    +      -       -      -
     61B  ASN*     3.0    32.8    +      -       -      +
     63B  ASN*     4.7     2.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 99 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     59A  ILE*     3.8    17.6    -      -       +      +
     60A  ARG*     3.6    27.6    -      -       +      +
     79A  HIS*     5.5     0.7    +      -       -      -
     81A  ALA      5.0     2.6    -      -       -      +
     82A  GLY*     3.6    30.7    -      -       -      +
     83A  GLN*     3.7    17.7    -      -       +      +
     95A  MET*     3.0    40.0    +      -       +      +
     96A  ASP      4.2     1.3    -      -       -      +
     98A  GLU*     1.3    76.9    -      -       -      +
    100A  ASN*     1.3    60.5    +      -       -      +
    103A  GLY*     3.1    23.0    +      -       -      -
    104A  THR*     4.0     1.2    +      -       -      -
   1200A  NAD      3.9    22.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 100 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     81A  ALA      4.5     1.4    -      -       -      +
     82A  GLY*     3.2    10.2    -      -       -      -
     83A  GLN*     2.9    38.4    +      -       -      +
     96A  ASP*     2.9    34.1    +      -       -      +
     99A  ILE*     1.3    75.5    -      -       -      +
    101A  VAL*     1.3    57.7    +      -       -      +
    104A  THR*     2.6    30.2    +      -       -      -
    122A  TYR*     4.3     2.1    +      -       -      +
    165A  TYR*     4.1     0.6    -      -       -      -
    168A  SER*     3.0    35.1    +      -       -      +
    169A  LYS*     3.6    23.5    +      -       +      +
    172A  ALA*     3.6     5.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 101 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     97A  PHE*     2.8    39.7    +      -       +      +
    100A  ASN*     1.3    72.2    -      -       -      +
    102A  GLY*     1.3    66.1    +      -       -      +
    104A  THR      3.2     0.9    +      -       -      -
    105A  LEU*     2.9    38.1    +      -       +      +
    168A  SER*     3.4    35.7    -      -       -      +
    171A  ALA*     4.1    20.4    -      -       +      -
    172A  ALA*     4.7     3.1    -      -       -      +
    175A  TYR*     4.9     1.6    -      -       +      -
     97C  PHE*     3.3    31.2    -      -       +      -
    101C  VAL*     4.9     1.1    -      -       +      -
    175C  TYR*     4.2     1.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 102 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     60A  ARG*     5.1     1.6    -      -       -      -
     97A  PHE*     3.1     9.9    +      -       -      -
     98A  GLU*     3.2    12.1    -      -       -      -
    101A  VAL*     1.3    79.4    -      -       -      +
    103A  GLY*     1.3    62.0    +      -       -      +
    105A  LEU*     3.4     2.7    +      -       -      +
    106A  ASN*     2.9    33.5    +      -       -      +
     97C  PHE*     4.5    14.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 103 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     59A  ILE*     3.3    41.9    +      -       -      +
     79A  HIS*     4.3     0.7    -      -       -      -
     98A  GLU      2.8    11.6    +      -       -      -
     99A  ILE      3.1    14.3    +      -       -      -
    102A  GLY*     1.3    76.0    -      -       -      +
    104A  THR*     1.3    61.0    +      -       -      +
    106A  ASN*     3.3     3.5    +      -       -      +
    107A  LEU*     3.2    19.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 104 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     79A  HIS*     3.0    23.7    +      -       +      -
     81A  ALA      5.5     0.2    +      -       -      -
     99A  ILE      4.0     0.5    +      -       -      -
    100A  ASN*     2.6    26.2    +      -       -      -
    101A  VAL      3.2     3.1    +      -       -      -
    103A  GLY*     1.3    72.8    -      -       -      +
    105A  LEU*     1.3    62.8    +      -       +      +
    107A  LEU*     3.2     3.4    +      -       -      +
    108A  LEU*     2.8    38.3    +      -       +      +
    122A  TYR*     3.8     5.0    -      -       +      -
    172A  ALA*     3.7    24.8    -      -       +      +
    176A  MET*     3.4    34.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 105 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     62A  LYS*     5.5     0.4    -      -       -      -
    101A  VAL*     2.9    40.8    +      -       +      +
    102A  GLY*     3.8     5.4    -      -       -      +
    104A  THR*     1.3    83.2    -      -       +      +
    106A  ASN*     1.3    62.2    +      -       -      +
    108A  LEU*     4.3     6.7    -      -       +      -
    109A  GLU*     2.8    35.1    +      -       +      +
    172A  ALA*     5.2     1.8    -      -       -      -
    175A  TYR*     3.7    53.8    -      -       +      -
    179A  TYR*     4.2    16.2    -      -       +      +
     93C  PRO      6.0     0.9    -      -       -      +
     97C  PHE*     4.0    28.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 106 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     59A  ILE      2.9    21.8    +      -       -      +
     60A  ARG*     3.0    23.8    +      -       -      +
     61A  ASN      3.7     0.2    -      -       -      -
     62A  LYS*     3.5    39.8    +      -       +      +
     65A  VAL*     3.8    19.2    -      -       +      +
     66A  THR*     5.0     2.4    +      -       -      -
    102A  GLY*     2.9    23.0    +      -       -      +
    103A  GLY      3.5     7.4    -      -       -      +
    104A  THR      3.3     0.2    -      -       -      -
    105A  LEU*     1.3    76.2    -      -       -      +
    107A  LEU*     1.3    63.0    +      -       -      +
    109A  GLU*     3.9     4.5    -      -       -      +
    110A  ALA*     3.1    23.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 107 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      5A  LEU*     4.6     4.7    -      -       +      -
      7A  THR*     4.9     5.6    -      -       +      -
     59A  ILE*     5.1     2.2    -      -       +      -
     65A  VAL*     3.7    14.3    -      -       +      +
     68A  LEU*     5.6     0.9    -      -       +      -
     69A  ILE*     3.8    29.4    -      -       +      -
     77A  CYS*     4.0    20.2    -      -       +      -
     79A  HIS*     3.6    43.3    -      -       +      +
    103A  GLY      3.2    10.8    +      -       -      +
    104A  THR*     3.2     6.5    +      -       -      +
    106A  ASN*     1.3    80.8    -      -       -      +
    108A  LEU*     1.4    57.3    +      -       -      +
    110A  ALA*     3.2     2.5    +      -       -      +
    111A  VAL*     2.9    36.9    +      -       +      +
    120A  ILE*     4.4    15.3    -      -       +      -
    176A  MET*     4.7     3.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 108 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    104A  THR*     2.8    35.5    +      -       +      +
    105A  LEU*     3.8     8.1    -      -       +      +
    107A  LEU*     1.4    73.2    -      -       -      +
    109A  GLU*     1.3    56.7    +      -       -      +
    111A  VAL*     3.3     3.6    +      -       -      +
    112A  ARG*     2.8    32.6    +      -       -      +
    120A  ILE*     4.2     9.6    -      -       +      -
    175A  TYR*     4.0    38.1    -      -       +      +
    176A  MET*     3.9    26.7    -      -       +      +
    179A  TYR*     3.7    40.4    -      -       +      -
    185A  LEU*     4.1    11.0    -      -       +      +
    187A  THR*     4.4     3.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 109 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     62A  LYS*     3.7    24.9    +      -       -      +
    105A  LEU*     2.8    28.0    +      -       +      +
    106A  ASN      3.9     1.8    -      -       -      +
    108A  LEU*     1.3    72.3    -      -       -      +
    110A  ALA*     1.3    58.0    +      -       -      +
    112A  ARG*     3.0    40.5    +      -       -      -
    113A  GLN*     2.9    47.4    +      -       -      +
    179A  TYR*     2.6    28.4    +      -       -      +
     93C  PRO*     3.6     5.0    -      -       -      +
     94C  CYS*     4.0    22.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 110 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65A  VAL*     4.5     1.1    -      -       +      +
     66A  THR*     4.1    23.3    -      -       -      +
     69A  ILE*     3.7    28.9    -      -       +      +
    106A  ASN      3.1    19.5    +      -       -      +
    107A  LEU*     3.7     4.0    -      -       -      +
    109A  GLU*     1.3    73.2    -      -       -      +
    111A  VAL*     1.3    62.9    +      -       -      +
    114A  TYR*     2.9    44.4    +      -       +      +
    115A  ASN      3.7     0.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 111 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     69A  ILE*     4.2    22.7    -      -       +      -
     77A  CYS*     6.3     0.4    -      -       +      -
    107A  LEU*     2.9    23.9    +      -       +      +
    108A  LEU      3.9     2.7    -      -       -      +
    110A  ALA*     1.3    77.2    -      -       -      +
    112A  ARG*     1.3    60.4    +      -       -      +
    115A  ASN*     2.8    43.1    +      -       -      +
    116A  SER*     2.8    17.0    +      -       -      -
    118A  CYS*     4.0    27.8    -      -       +      +
    120A  ILE*     4.2    19.1    -      -       +      -
    185A  LEU*     3.9    18.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 112 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108A  LEU      2.8    18.8    +      -       -      +
    109A  GLU*     3.0    42.4    +      -       -      +
    111A  VAL*     1.3    81.0    -      -       -      +
    113A  GLN*     1.3    81.4    +      -       -      +
    116A  SER*     3.8    12.1    -      -       -      -
    179A  TYR*     4.0     8.1    -      -       +      -
    183A  PHE*     3.4    52.2    -      -       +      -
    185A  LEU*     4.2    14.6    -      -       +      +
     90C  ILE      5.0     1.6    +      -       -      -
     91C  ASP      5.2     4.4    +      -       -      -
     93C  PRO*     3.6    21.5    -      -       -      +
     67D  ARG*     6.0     1.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 113 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     62A  LYS*     5.4     5.5    -      -       -      +
    109A  GLU*     2.9    35.4    +      -       -      +
    110A  ALA*     5.2     0.2    -      -       -      +
    112A  ARG*     1.3   106.3    +      -       -      +
    114A  TYR*     1.3    94.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 114 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     66A  THR*     3.7    26.1    -      -       +      +
     69A  ILE*     4.7     3.8    -      -       +      -
     70A  THR*     3.6    32.3    -      -       +      -
     73A  MET*     3.4    19.2    -      -       -      +
    110A  ALA*     2.9    21.3    +      -       +      +
    113A  GLN*     1.3   113.8    +      -       +      +
    115A  ASN*     1.3    62.3    +      -       -      +
    116A  SER      3.9     0.7    -      -       -      -
    114D  TYR*     3.5    22.8    +      +       -      -
----------------------------------------------------------
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Residues in contact with ASN 115 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     69A  ILE*     3.7    20.2    -      -       +      +
     73A  MET*     3.3    25.2    -      -       -      +
     74A  PRO*     2.8    50.3    +      -       -      +
    110A  ALA      3.7     0.8    +      -       -      -
    111A  VAL*     2.8    21.8    +      -       -      +
    114A  TYR*     1.3    75.9    -      -       -      +
    116A  SER*     1.3    61.5    -      -       -      +
    117A  ASN*     3.0    11.3    +      -       -      +
    118A  CYS*     3.1    20.3    +      -       -      +
----------------------------------------------------------
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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