Contacts of the helix formed by residues 47 - 71 (chain A) in PDB entry 2YVE


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 SER 47 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     27A  TYR*     2.9    14.2    +      -       -      -
     45A  PHE      3.9     2.3    -      -       -      +
     46A  PRO*     1.3    81.2    -      -       -      +
     48A  ARG*     1.3    65.8    +      -       -      +
     49A  HIS*     3.4    12.9    +      -       -      +
     50A  ALA*     3.0    32.1    +      -       -      +
     51A  LEU*     3.1    10.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 48 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     22A  LEU*     3.0    36.2    +      -       -      +
     23A  GLU*     4.2     7.0    +      -       -      +
     25A  LEU*     2.8    29.5    +      -       -      +
     26A  SER*     4.5     8.0    -      -       -      +
     27A  TYR*     3.4    19.0    +      -       +      +
     47A  SER*     1.3    73.9    -      -       -      +
     49A  HIS*     1.3    63.6    +      -       -      +
     51A  LEU*     3.0    18.3    +      -       +      +
     52A  LEU*     2.9    49.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with HIS 49 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     47A  SER*     3.5    12.1    -      -       -      +
     48A  ARG*     1.3    78.8    -      -       -      +
     50A  ALA*     1.3    60.7    +      -       +      +
     52A  LEU*     3.3     9.5    +      -       -      +
     53A  LEU*     2.9    34.3    +      -       +      +
    106A  HIS*     3.4    42.7    +      +       -      +
    108A  ASP*     2.7    27.4    +      -       +      +
    109A  PHE*     3.6    22.6    -      +       -      -
----------------------------------------------------------
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Residues in contact with ALA 50 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45A  PHE*     3.6     9.0    -      -       +      -
     46A  PRO*     4.0    27.8    -      -       +      -
     47A  SER*     3.0    22.2    +      -       -      +
     49A  HIS*     1.3    76.6    -      -       +      +
     51A  LEU*     1.3    60.6    +      -       -      +
     53A  LEU*     3.4     4.2    +      -       -      -
     54A  GLY      2.9    23.4    +      -       -      -
   2004A  GOL      3.0    24.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 51 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      9A  ILE*     4.7     0.7    -      -       +      -
     10A  LEU*     3.8    20.0    -      -       +      +
     13A  ALA*     4.4     4.5    -      -       +      -
     25A  LEU*     4.2    24.5    -      -       +      -
     26A  SER      5.6     5.6    -      -       -      +
     27A  TYR*     5.7     7.9    -      -       +      +
     30A  LEU*     3.8    33.0    -      -       +      -
     45A  PHE*     3.7    27.7    -      -       +      -
     47A  SER      3.1    10.8    +      -       -      +
     48A  ARG*     3.0    20.6    +      -       +      +
     50A  ALA*     1.3    76.8    -      -       -      +
     52A  LEU*     1.3    64.7    +      -       +      +
     54A  GLY*     3.1     3.5    +      -       -      -
     55A  MET*     3.1    34.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 52 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     22A  LEU*     3.7    31.6    -      -       +      -
     25A  LEU*     4.8     5.6    -      -       +      -
     48A  ARG*     2.9    48.2    +      -       +      +
     49A  HIS*     3.7     7.2    -      -       -      +
     51A  LEU*     1.3    75.0    -      -       +      +
     53A  LEU*     1.3    64.9    +      -       -      +
     55A  MET*     3.0    26.1    +      -       -      +
     56A  HIS*     3.1    23.7    +      -       +      +
     99A  LEU*     4.4     8.7    -      -       +      -
    102A  ASP*     4.8     9.2    -      -       -      +
    109A  PHE*     3.8    27.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 53 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     49A  HIS*     2.9    22.0    +      -       +      +
     50A  ALA*     3.7     6.5    -      -       -      +
     52A  LEU*     1.3    75.6    -      -       -      +
     54A  GLY*     1.3    65.2    +      -       -      +
     56A  HIS*     3.2     2.2    +      -       -      +
     57A  GLU*     2.9    44.5    +      -       +      +
    108A  ASP*     3.4    49.1    -      -       +      +
    109A  PHE*     3.7    12.5    -      -       +      -
    112A  ALA*     4.1     6.5    -      -       +      -
   2004A  GOL      3.6    31.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 54 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6A  LYS*     6.2     0.4    -      -       -      -
     10A  LEU*     3.8    21.9    -      -       -      +
     45A  PHE*     4.6     2.9    -      -       -      -
     50A  ALA      2.9    15.5    +      -       -      -
     51A  LEU      3.1     4.2    +      -       -      -
     53A  LEU*     1.3    77.2    -      -       -      +
     55A  MET*     1.3    56.0    +      -       -      +
     57A  GLU*     3.9     9.3    -      -       -      +
     58A  LEU*     3.0    30.5    +      -       -      +
   2004A  GOL      3.7     8.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with MET 55 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     10A  LEU*     3.7    19.7    -      -       +      +
     13A  ALA*     3.7    22.4    -      -       +      -
     14A  ILE*     3.7    21.3    -      -       +      -
     17A  ILE*     3.7    28.0    -      -       +      -
     25A  LEU*     4.0     7.6    -      -       +      -
     51A  LEU*     3.2    33.4    -      -       -      +
     52A  LEU*     3.0    16.9    +      -       -      +
     54A  GLY*     1.3    74.5    -      -       -      +
     56A  HIS*     1.3    64.6    +      -       -      +
     58A  LEU*     3.3     3.1    +      -       -      +
     59A  LEU*     3.0    31.3    +      -       -      +
     99A  LEU*     4.3    16.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with HIS 56 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     52A  LEU*     3.1    29.1    +      -       +      +
     53A  LEU*     3.2     6.0    +      -       -      +
     55A  MET*     1.3    75.5    -      -       -      +
     57A  GLU*     1.3    58.6    +      -       -      +
     59A  LEU*     3.8     2.9    -      -       -      +
     60A  ALA*     2.9    30.5    +      -       -      +
     99A  LEU*     3.1    52.1    -      -       +      +
    102A  ASP*     4.8     4.0    +      -       -      -
    103A  ALA*     3.8    16.4    +      -       +      -
    109A  PHE*     3.7    36.5    -      +       +      +
    112A  ALA*     3.8    16.2    -      -       +      -
    113A  TRP*     3.0    31.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 57 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     53A  LEU*     2.9    28.2    +      -       +      +
     54A  GLY*     3.9     6.8    -      -       -      +
     56A  HIS*     1.3    77.8    -      -       -      +
     58A  LEU*     1.3    56.6    +      -       -      +
     60A  ALA*     3.8     3.3    -      -       -      +
     61A  ASP*     2.9    31.8    +      -       -      +
    112A  ALA*     3.8    21.8    -      -       +      +
   2004A  GOL      2.8    51.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 58 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      7A  GLU*     4.1    20.4    -      -       +      +
     10A  LEU*     3.7    31.6    -      -       +      -
     11A  ARG*     3.6    50.3    -      -       -      +
     14A  ILE*     4.3     8.7    -      -       +      -
     54A  GLY      3.0    18.2    +      -       -      +
     55A  MET*     3.8     4.3    -      -       -      +
     56A  HIS      3.3     0.2    -      -       -      -
     57A  GLU*     1.3    77.6    -      -       -      +
     59A  LEU*     1.3    57.0    +      -       -      +
     61A  ASP*     3.2    10.3    +      -       +      +
     62A  ASP*     2.8    35.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 59 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     11A  ARG*     4.8     2.2    -      -       -      +
     14A  ILE*     4.0    28.5    -      -       +      -
     55A  MET      3.0    18.8    +      -       -      +
     56A  HIS*     5.2     0.2    -      -       -      -
     58A  LEU*     1.3    76.5    -      -       -      +
     60A  ALA*     1.3    62.1    +      -       -      +
     62A  ASP*     3.3    18.5    +      -       +      +
     63A  TRP*     3.2    21.7    +      -       -      +
     96A  GLU*     3.4    44.0    -      -       +      +
     99A  LEU*     3.6    34.1    -      -       +      -
    113A  TRP*     3.8    16.0    -      -       +      -
   1001A  MBT      4.5     0.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 60 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     56A  HIS      2.9    19.4    +      -       -      +
     57A  GLU*     3.8     3.6    -      -       -      +
     59A  LEU*     1.3    75.8    -      -       -      +
     61A  ASP*     1.3    63.4    +      -       -      +
     63A  TRP*     3.3     4.3    +      -       -      +
     64A  ASP*     3.0    22.7    +      -       -      +
    112A  ALA      3.4    24.7    -      -       -      +
    113A  TRP*     3.7    27.0    -      -       +      -
    116A  VAL*     4.1    13.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 61 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     57A  GLU      2.9    19.6    +      -       -      +
     58A  LEU*     3.6    10.9    -      -       +      +
     60A  ALA*     1.3    74.7    -      -       -      +
     62A  ASP*     1.3    69.1    +      -       -      +
     64A  ASP*     3.3     8.9    +      -       -      +
     65A  LYS*     2.9    38.5    +      -       -      +
     68A  ARG*     4.6    11.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 62 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     11A  ARG*     2.7    46.3    +      -       -      -
     58A  LEU*     2.8    22.3    +      -       -      +
     59A  LEU*     3.5    19.1    -      -       +      +
     60A  ALA      3.3     0.2    -      -       -      -
     61A  ASP*     1.3    81.1    -      -       -      +
     63A  TRP*     1.3    62.2    +      -       -      +
     65A  LYS*     3.4    13.4    +      -       -      +
     66A  GLU*     3.0    23.2    +      -       -      +
   1001A  MBT      4.4    14.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with TRP 63 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     59A  LEU      3.2     4.3    +      -       -      +
     60A  ALA*     3.7     6.7    -      -       -      +
     62A  ASP*     1.3    76.9    -      -       -      +
     64A  ASP*     1.3    64.7    +      -       -      +
     66A  GLU*     3.2     2.2    +      -       +      +
     67A  LEU*     2.9    41.7    +      -       +      +
     84A  VAL*     4.6     4.3    -      -       +      -
     87A  THR*     3.0    25.5    +      -       +      -
     88A  LEU*     4.4     6.3    -      -       +      -
    113A  TRP*     4.3     2.0    -      +       -      -
    116A  VAL*     3.7    33.0    -      -       +      -
    117A  ASN*     4.2    11.2    -      -       -      -
    120A  TRP*     5.5     0.4    -      -       +      -
    121A  ILE*     3.6    36.3    -      -       +      -
   1001A  MBT      3.3    97.1    -      +       +      +
----------------------------------------------------------
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Residues in contact with ASP 64 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     60A  ALA      3.0    17.0    +      -       -      +
     61A  ASP*     3.7    12.1    -      -       -      +
     63A  TRP*     1.3    74.9    -      -       -      +
     65A  LYS*     1.3    57.7    +      -       -      +
     67A  LEU*     3.3     1.6    +      -       -      +
     68A  ARG*     2.9    59.3    +      -       -      +
    115A  THR*     6.3     0.4    -      -       -      -
    116A  VAL*     3.8    17.3    -      -       +      +
    119A  GLN*     3.8    14.5    -      -       -      +
    120A  TRP*     3.0    26.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 65 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     61A  ASP*     2.9    30.3    +      -       -      +
     62A  ASP*     3.8    12.4    +      -       -      +
     64A  ASP*     1.3    76.0    +      -       -      +
     66A  GLU*     1.3    64.5    +      -       -      +
     68A  ARG*     3.4    26.6    +      -       -      +
     69A  ASP*     2.9    45.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 66 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     62A  ASP      3.0    13.5    +      -       -      +
     63A  TRP*     3.5     8.1    -      -       +      +
     65A  LYS*     1.3    76.0    -      -       -      +
     67A  LEU*     1.3    61.5    +      -       -      +
     69A  ASP*     3.2    10.8    +      -       -      +
     70A  ILE*     3.2    40.8    +      -       -      +
     86A  VAL*     5.4     1.4    -      -       -      +
     87A  THR*     3.5    28.1    -      -       +      +
   1001A  MBT      3.3    52.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 67 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63A  TRP*     2.9    49.3    +      -       +      +
     64A  ASP      3.7     1.3    -      -       -      +
     66A  GLU*     1.3    73.2    -      -       -      +
     68A  ARG*     1.3    64.5    +      -       -      +
     70A  ILE*     3.3     3.7    +      -       -      -
     71A  THR*     2.7    30.7    +      -       -      -
     83A  ALA*     4.0     4.9    -      -       +      -
     84A  VAL*     3.8    31.6    -      -       +      +
     87A  THR*     3.6    23.1    -      -       +      +
    116A  VAL*     4.4     0.9    -      -       +      -
    120A  TRP*     3.5    53.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 68 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     61A  ASP*     4.6     8.9    +      -       -      -
     64A  ASP*     2.9    41.5    +      -       -      +
     65A  LYS*     3.8    32.8    -      -       -      +
     67A  LEU*     1.3    76.7    -      -       -      +
     69A  ASP*     1.3    65.9    +      -       -      +
     70A  ILE      3.5     0.2    +      -       -      -
     71A  THR*     3.8    11.5    +      -       -      +
    120A  TRP*     3.8    19.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 69 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65A  LYS*     2.9    37.3    +      -       -      +
     66A  GLU*     3.5    11.1    -      -       -      +
     67A  LEU      3.2     0.2    -      -       -      -
     68A  ARG*     1.3    81.9    +      -       -      +
     70A  ILE*     1.3    64.2    +      -       +      +
     71A  THR      5.5     0.2    -      -       -      -
     72A  ARG*     5.5     6.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 70 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     66A  GLU*     3.2    40.4    +      -       -      +
     67A  LEU*     4.1     4.0    -      -       -      +
     69A  ASP*     1.3    85.7    -      -       +      +
     71A  THR*     1.3    61.2    +      -       -      +
     72A  ARG*     3.7     8.2    +      -       -      +
     83A  ALA*     3.9    25.6    -      -       +      +
     86A  VAL*     4.0    20.2    -      -       +      -
     87A  THR*     3.9    15.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 71 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     67A  LEU      2.7    21.7    +      -       -      -
     68A  ARG      3.8     8.4    +      -       -      +
     69A  ASP      3.6     2.2    -      -       -      -
     70A  ILE*     1.3    77.0    -      -       -      +
     72A  ARG*     1.3    72.9    -      -       -      +
     74A  PRO*     3.7    33.6    -      -       +      +
     79A  GLU*     3.8    23.1    -      -       +      +
     80A  ARG      4.2     0.4    -      -       -      +
     83A  ALA*     3.0    20.8    -      -       -      +
    120A  TRP*     3.3    21.6    -      -       +      -
----------------------------------------------------------
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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