Contacts of the helix formed by residues 103 - 127 (chain D) in PDB entry 5SV1


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 ASP 103 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101D  SER*     3.3    12.8    +      -       -      +
    102D  ASP*     1.3    75.5    -      -       -      +
    104D  ASN*     1.3    63.6    +      -       -      +
    105D  GLU*     3.2    21.0    +      -       -      +
    106D  GLY*     3.5    15.9    +      -       -      -
    107D  ILE*     3.7    12.8    +      -       -      +
    108E  MLY      3.7    25.3    -      -       -      -
    225E  ASP*     3.5    19.2    -      -       -      +
    229E  SER*     4.3     3.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 104 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101D  SER      5.0     3.8    -      -       -      +
    102D  ASP      3.5     8.9    +      -       -      +
    103D  ASP*     1.3    71.6    +      -       -      +
    105D  GLU*     1.3    66.7    +      -       -      +
    106D  GLY      3.1     2.7    +      -       -      -
    107D  ILE*     3.4    12.6    +      -       -      +
    108D  MLY      3.3    36.4    +      -       -      +
    224D  LEU*     2.8    58.7    +      -       +      +
    227D  GLU*     5.3     3.3    +      -       -      +
    228D  ALA*     3.1    22.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 105 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    103C  ASP*     4.7     4.8    -      -       -      +
    105C  GLU*     3.5    28.2    -      -       -      +
    109C  GLU*     3.8    13.0    -      -       -      +
    103D  ASP*     3.2    12.6    +      -       -      +
    104D  ASN*     1.3    78.3    -      -       -      +
    106D  GLY*     1.3    63.2    +      -       -      +
    108D  MLY      3.9    29.0    -      -       +      +
    109D  GLU*     3.5    32.1    +      -       +      +
    108E  MLY      5.5     0.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 106 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    103D  ASP*     3.5     9.8    +      -       -      -
    104D  ASN      3.1     0.6    -      -       -      -
    105D  GLU*     1.3    76.3    -      -       -      +
    107D  ILE*     1.3    69.3    +      -       -      +
    109D  GLU*     2.9    15.1    +      -       -      +
    110D  ARG*     3.1    30.3    +      -       -      +
    108E  MLY      4.0    17.5    -      -       -      -
    225E  ASP*     3.9     8.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 107 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     94D  GLU*     4.7     5.6    -      -       +      +
     95D  LEU*     3.9    22.9    -      -       +      +
     98D  SER*     3.6    35.4    -      -       -      +
    101D  SER*     5.2     6.5    -      -       -      +
    103D  ASP      3.7    10.5    +      -       -      +
    104D  ASN*     3.4    17.8    +      -       -      +
    106D  GLY*     1.3    73.4    -      -       -      +
    108D  MLY      1.3    65.6    +      -       -      +
    110D  ARG*     3.0    16.4    +      -       -      +
    111D  THR*     2.8    26.3    +      -       -      +
    220D  GLN*     3.4    25.6    -      -       -      +
    224D  LEU*     3.7    16.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with MLY 108 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    103C  ASP*     3.5    14.4    -      -       -      -
    106C  GLY*     4.0    17.3    -      -       -      -
    109C  GLU*     3.7    24.2    -      -       -      +
    104D  ASN*     3.3    17.7    -      -       -      +
    105D  GLU*     3.9    39.9    -      -       +      +
    106D  GLY      3.2     0.4    -      -       -      -
    107D  ILE*     1.3    77.1    +      -       -      +
    109D  GLU*     1.3    64.7    +      -       +      +
    111D  THR*     3.0     2.3    +      -       -      -
    112D  SER*     2.9    27.2    +      -       -      +
    217D  LEU*     5.1     0.3    -      -       -      +
    220D  GLN*     4.3    11.7    -      -       -      +
    221D  SER*     3.8    38.4    -      -       -      +
    224D  LEU*     4.2    18.6    -      -       +      -
    225D  ASP*     2.7    28.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 109 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    105D  GLU*     3.5    25.9    +      -       +      +
    106D  GLY      2.9    10.0    +      -       -      +
    108D  MLY      1.3    75.6    -      -       +      +
    110D  ARG*     1.3    66.4    +      -       +      +
    112D  SER*     2.9     6.2    +      -       -      -
    113D  PHE*     2.9    22.5    +      -       -      +
    108E  MLY      3.7    25.6    -      -       -      +
    221E  SER*     5.1     0.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 110 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     94D  GLU*     3.2    25.4    +      -       -      +
     98D  SER*     3.1    26.4    +      -       -      -
    101D  SER*     4.7     3.6    +      -       -      -
    106D  GLY*     3.1    16.4    +      -       -      +
    107D  ILE*     3.0    33.1    +      -       -      +
    109D  GLU*     1.3    77.6    -      -       +      +
    111D  THR*     1.3    64.2    +      -       -      +
    113D  PHE*     3.1     4.9    +      -       -      +
    114D  ARG*     2.8    27.9    +      -       -      +
    218E  LEU*     3.6    36.3    -      -       +      -
    221E  SER*     3.3    24.2    +      -       -      +
    222E  ARG*     3.6    20.6    -      -       -      +
    225E  ASP*     2.8    40.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 111 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     90D  GLU      5.4     0.4    -      -       -      +
     91D  ALA*     4.0    23.6    -      -       +      +
     94D  GLU*     3.5    17.6    -      -       -      +
    107D  ILE*     2.8    11.2    +      -       -      +
    108D  MLY      3.4     4.9    -      -       -      -
    110D  ARG*     1.3    75.4    -      -       -      +
    112D  SER*     1.3    63.7    +      -       -      +
    114D  ARG*     3.0     7.9    +      -       +      +
    115D  LEU*     2.8    27.2    +      -       +      +
    217D  LEU*     3.6    14.8    -      -       +      -
    220D  GLN*     2.9    44.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 112 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108D  MLY      2.9    15.4    +      -       -      +
    109D  GLU*     3.5     9.1    -      -       -      -
    111D  THR*     1.3    75.4    -      -       -      +
    113D  PHE*     1.3    53.9    +      -       -      +
    115D  LEU*     3.0     2.9    +      -       -      +
    116D  GLU*     2.7    47.0    +      -       -      +
    217D  LEU*     3.4    32.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 113 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    109D  GLU      2.9    12.2    +      -       -      +
    110D  ARG*     3.4    12.1    -      -       -      +
    112D  SER*     1.3    75.3    -      -       -      +
    114D  ARG*     1.3    66.8    +      -       -      +
    116D  GLU*     3.0    16.3    +      -       +      +
    117D  ARG*     3.1    27.9    +      -       +      +
    116E  GLU*     3.9    21.1    -      -       -      -
    214E  ALA*     3.3    39.5    -      -       +      -
    217E  LEU*     4.4    15.5    -      -       +      -
    218E  LEU*     4.1    20.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 114 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     90D  GLU*     3.0    65.6    +      -       +      +
     93D  ASN*     3.1    29.1    +      -       -      +
     94D  GLU*     3.2    36.7    +      -       -      +
     97D  LEU*     4.8     2.2    -      -       -      +
    110D  ARG      2.8    21.0    +      -       -      +
    111D  THR*     3.4     7.2    -      -       +      +
    113D  PHE*     1.3    71.4    -      -       -      +
    115D  LEU*     1.3    65.1    +      -       +      +
    117D  ARG*     3.0    18.4    +      -       -      +
    118D  ARG*     3.2    12.3    +      -       -      +
    218E  LEU*     3.6    26.2    -      -       +      +
    222E  ARG*     4.8     0.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 115 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     87D  LEU*     3.8    43.1    -      -       +      +
     90D  GLU*     4.2    13.7    -      -       +      +
     91D  ALA*     4.9     1.6    -      -       +      +
    111D  THR*     2.8    25.2    +      -       +      +
    112D  SER*     3.7     4.5    -      -       -      +
    114D  ARG*     1.3    73.7    -      -       +      +
    116D  GLU*     1.3    64.1    +      -       +      +
    118D  ARG*     3.0    15.8    +      -       +      +
    119D  VAL*     3.2    17.4    +      -       -      +
    213D  ALA*     3.8    26.2    -      -       +      +
    216D  VAL*     4.1    17.0    -      -       +      -
    217D  LEU*     3.7    33.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 116 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    113C  PHE*     5.9     2.3    -      -       -      -
    112D  SER*     2.7    41.8    +      -       -      +
    113D  PHE*     3.0    11.4    +      -       +      +
    115D  LEU*     1.3    74.4    -      -       -      +
    117D  ARG*     1.3    66.8    +      -       -      +
    119D  VAL*     4.6     7.0    -      -       -      +
    120D  ALA*     3.7    18.4    +      -       -      +
    217D  LEU*     5.0     8.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 117 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    113D  PHE*     3.1    27.2    +      -       +      +
    114D  ARG*     3.0     9.6    +      -       -      +
    116D  GLU*     1.3    81.1    -      -       -      +
    118D  ARG*     1.3    73.1    +      -       -      +
    120D  ALA*     3.0    11.3    +      -       -      +
    121D  ALA*     2.8    24.6    +      -       +      +
    124D  ARG*     5.0     8.3    +      -       -      +
    116E  GLU*     5.6     3.8    +      -       -      -
    207E  ALA*     3.9     9.5    +      -       -      +
    210E  GLY*     3.0    39.3    +      -       -      -
    211E  ASP*     2.7    31.9    +      -       -      +
    214E  ALA*     4.3    20.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 118 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     86D  HIS*     5.1    21.1    -      -       +      +
     87D  LEU*     3.6    28.9    -      -       +      -
     90D  GLU*     3.2    37.5    +      -       +      +
    114D  ARG      3.2     8.4    +      -       -      +
    115D  LEU*     3.0    11.8    +      -       +      +
    117D  ARG*     1.3    83.5    -      -       -      +
    119D  VAL*     1.3    66.1    +      -       -      +
    121D  ALA*     2.9     8.4    +      -       -      +
    122D  VAL*     2.9    32.5    +      -       +      +
    209D  LEU*     5.1     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 119 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     87D  LEU*     4.9     3.8    -      -       +      -
    115D  LEU      3.2    11.0    +      -       -      +
    116D  GLU*     4.6     7.9    -      -       -      +
    118D  ARG*     1.3    78.1    -      -       +      +
    120D  ALA*     1.3    67.0    +      -       -      +
    122D  VAL*     3.0     3.8    +      -       -      +
    123D  GLY*     2.8    20.8    +      -       -      -
    206D  LYS*     4.8    12.3    -      -       +      +
    209D  LEU*     3.6    34.6    -      -       +      +
    210D  GLY*     4.6    13.2    -      -       -      +
    213D  ALA*     3.9    28.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 120 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    116D  GLU      3.7    12.7    +      -       -      +
    117D  ARG*     3.0    18.0    +      -       -      +
    119D  VAL*     1.3    79.0    -      -       -      +
    121D  ALA*     1.3    64.9    +      -       -      +
    123D  GLY*     3.0     3.8    +      -       -      -
    124D  ARG*     2.8    34.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 121 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    117D  ARG*     2.8    17.1    +      -       +      +
    118D  ARG*     3.4    15.5    -      -       -      +
    120D  ALA*     1.3    70.9    -      -       -      +
    122D  VAL*     1.3    65.0    +      -       +      +
    124D  ARG*     3.0    32.6    +      -       -      +
    125D  GLN*     2.9    23.5    +      -       -      +
    211E  ASP*     5.3     4.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 122 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     51D  GLN*     6.1     0.2    -      -       -      +
     83D  LEU*     4.5    22.4    -      -       +      -
    118D  ARG*     2.9    25.9    +      -       -      +
    119D  VAL      3.6     5.8    -      -       -      +
    121D  ALA*     1.3    76.3    -      -       +      +
    123D  GLY*     1.3    65.1    +      -       -      +
    125D  GLN*     3.0    16.4    +      -       +      +
    126D  MET*     3.0    18.4    +      -       +      +
    205D  PHE*     3.8    29.2    -      -       +      -
    209D  LEU*     4.0    18.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 123 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    119D  VAL      2.8    17.3    +      -       -      -
    120D  ALA*     3.4     4.7    -      -       -      -
    122D  VAL*     1.3    73.9    -      -       -      +
    124D  ARG*     1.3    61.6    +      -       -      +
    126D  MET*     3.0    18.4    +      -       -      +
    127D  GLY*     3.3     9.5    +      -       -      -
    202D  ILE*     5.1     0.5    -      -       -      +
    205D  PHE*     6.0     0.4    -      -       -      -
    206D  LYS*     3.9    38.3    -      -       -      -
    209D  LEU*     5.5     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 124 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    117D  ARG*     5.0     4.8    -      -       -      +
    120D  ALA*     2.8    22.8    +      -       -      +
    121D  ALA*     3.5    33.1    +      -       -      +
    123D  GLY*     1.3    71.2    -      -       -      +
    125D  GLN*     1.3    62.5    +      -       -      +
    127D  GLY*     3.9     2.7    +      -       -      -
    128D  ARG*     3.8    17.2    +      -       -      +
    203E  GLY      5.5     1.1    -      -       -      -
    204E  GLY*     4.7    14.8    +      -       -      -
    207E  ALA*     3.5    35.2    -      -       -      +
    208E  MET*     5.2     6.7    -      -       -      +
    211E  ASP*     4.3    17.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 125 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     44D  LYS*     5.1     3.8    +      -       -      -
     47D  GLU*     5.0     3.8    -      -       -      +
    121D  ALA      2.9    12.8    +      -       -      +
    122D  VAL*     3.6    11.0    -      -       +      +
    124D  ARG*     1.3    79.9    +      -       -      +
    126D  MET*     1.3    64.7    +      -       +      +
    128D  ARG*     3.8    19.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with MET 126 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     44D  LYS*     4.0    12.1    -      -       -      -
     47D  GLU*     3.8    11.0    -      -       -      +
     48D  PHE*     3.4    44.5    -      -       +      -
     51D  GLN*     3.6    26.9    -      -       +      +
    122D  VAL*     3.0    19.2    +      -       +      +
    123D  GLY*     3.0     7.3    +      -       -      +
    125D  GLN*     1.3    78.8    -      -       +      +
    127D  GLY*     1.3    57.4    -      -       -      +
    128D  ARG      3.2     5.4    +      -       -      -
    129D  GLY      4.5     0.7    +      -       -      -
    130D  ASN*     5.4     1.4    +      -       -      +
    202D  ILE*     3.4    24.1    -      -       +      +
    205D  PHE*     3.5    50.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 127 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    123D  GLY      3.3    10.4    +      -       -      -
    124D  ARG*     3.9     5.4    +      -       -      -
    125D  GLN      3.4     0.4    -      -       -      -
    126D  MET*     1.3    77.0    -      -       -      +
    128D  ARG*     1.3    62.8    +      -       -      +
    129D  GLY      3.2     3.3    +      -       -      -
    130D  ASN*     3.7    18.9    +      -       -      +
    131D  GLY      4.5     2.1    +      -       -      -
    202D  ILE*     3.4    15.7    -      -       -      +
    200E  ARG*     4.8     7.6    -      -       -      -
----------------------------------------------------------
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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