Contacts of the helix formed by residues 130 - 153 (chain B) 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 ASP 130 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    126B  ASP*     3.0    26.7    +      -       -      +
    127B  LEU      3.5     2.5    +      -       -      +
    129B  ASN*     1.3    79.0    -      -       -      +
    131B  ALA*     1.3    62.3    +      -       -      +
    132B  HIS*     3.0    22.8    +      -       -      +
    133B  LYS*     3.1    34.0    +      -       +      +
    134B  ARG*     3.1    25.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 131 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    129B  ASN      4.0     1.6    +      -       -      -
    130B  ASP*     1.3    72.7    +      -       -      +
    132B  HIS*     1.3    57.0    +      -       -      +
    134B  ARG*     3.3    32.0    +      -       -      +
    135B  ALA*     3.0    28.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 132 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     78B  LEU*     5.4     8.0    -      -       +      +
    130B  ASP*     3.0    10.1    +      -       -      +
    131B  ALA*     1.3    75.8    -      -       -      +
    133B  LYS*     1.3    75.7    +      -       +      +
    135B  ALA*     3.2     6.1    +      -       -      +
    136B  VAL*     3.1    44.6    +      -       +      +
    174B  PRO*     4.4    20.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 133 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    122B  PRO*     5.8     0.7    -      -       -      +
    123B  ASP*     2.9    46.2    +      -       -      +
    124B  THR      5.2     0.2    -      -       -      -
    125B  ASP*     2.8    32.1    +      -       -      +
    126B  ASP*     4.9     2.9    -      -       +      +
    127B  LEU*     3.5    14.5    -      -       +      +
    130B  ASP*     3.1    36.1    +      -       +      +
    132B  HIS*     1.3    85.6    -      -       +      +
    134B  ARG*     1.3    57.7    +      -       -      +
    136B  VAL*     3.5     6.3    +      -       -      +
    137B  TYR*     2.9    29.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 134 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    164A  ALA*     3.9    21.0    +      -       -      +
    165A  MET*     3.4    16.3    -      -       -      +
    168A  THR*     3.2    31.6    +      -       +      +
    171A  GLU*     5.3     8.3    +      -       -      -
    127B  LEU*     3.0    43.1    +      -       +      +
    128B  GLU      3.2    17.8    +      -       -      -
    129B  ASN      3.9     1.8    -      -       -      -
    130B  ASP      3.1    20.1    +      -       -      +
    131B  ALA*     3.6    31.9    -      -       -      +
    132B  HIS      3.1     0.2    -      -       -      -
    133B  LYS*     1.3    75.9    -      -       -      +
    135B  ALA*     1.3    59.8    +      -       -      +
    137B  TYR      3.3     0.2    +      -       -      -
    138B  LEU*     2.8    30.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 135 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    168A  THR*     5.0     2.9    -      -       -      +
    131B  ALA      3.0    13.6    +      -       -      +
    132B  HIS*     3.2    11.9    +      -       -      +
    134B  ARG*     1.3    76.5    -      -       -      +
    136B  VAL*     1.3    61.6    +      -       -      +
    138B  LEU*     3.5    22.1    +      -       -      +
    139B  VAL*     3.5    13.7    +      -       -      +
    172B  LEU*     4.8     2.5    -      -       -      +
    174B  PRO*     4.1    20.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 136 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     78B  LEU*     4.4    12.6    -      -       +      -
     81B  LEU*     3.9    18.5    -      -       +      +
    122B  PRO*     3.5    28.0    -      -       +      +
    132B  HIS*     3.1    40.8    +      -       +      +
    133B  LYS*     3.8     5.8    -      -       -      +
    135B  ALA*     1.3    74.8    -      -       -      +
    137B  TYR*     1.3    65.3    +      -       -      +
    139B  VAL*     3.2    20.1    +      -       -      +
    140B  GLN*     3.4     9.9    +      -       -      +
    174B  PRO*     4.3    14.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 137 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    149A  HIS*     2.8    31.3    +      +       -      -
    153A  HIS*     4.8     2.1    +      -       -      -
    155A  ASP*     4.7     0.9    +      -       -      -
    157A  LEU*     4.2    16.2    -      -       +      +
    165A  MET*     4.0    10.3    -      -       +      -
    121B  ILE*     4.2    14.7    -      -       +      +
    122B  PRO*     3.6    35.7    -      -       +      -
    123B  ASP      4.6     3.6    -      -       -      +
    124B  THR*     3.6    22.7    -      -       +      +
    127B  LEU*     3.9    24.5    -      -       +      -
    133B  LYS      2.9    18.7    +      -       -      +
    134B  ARG      3.9     3.1    -      -       -      +
    136B  VAL*     1.3    75.6    -      -       -      +
    138B  LEU*     1.3    61.0    +      -       -      +
    140B  GLN*     3.1    14.3    +      -       +      +
    141B  LEU*     2.9    52.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 138 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    142A  ALA*     3.9    13.9    -      -       +      -
    165A  MET*     3.6     9.6    -      -       +      +
    168A  THR*     4.2    16.8    -      -       +      -
    169A  ILE*     3.7    32.3    -      -       +      -
    172A  LEU*     3.9    30.7    -      -       +      -
    134B  ARG      2.8    17.7    +      -       -      +
    135B  ALA*     3.5    10.5    -      -       -      +
    136B  VAL      3.2     0.4    -      -       -      -
    137B  TYR*     1.3    75.4    -      -       -      +
    139B  VAL*     1.3    63.2    +      -       -      +
    141B  LEU*     3.3     4.2    +      -       +      +
    142B  ALA*     3.0    22.0    +      -       -      +
    172B  LEU*     4.1    24.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 139 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     81B  LEU*     4.0    11.7    -      -       +      -
     85B  VAL*     3.5    26.5    -      -       +      -
    135B  ALA      3.6    14.8    -      -       -      +
    136B  VAL      3.2     9.1    +      -       -      +
    138B  LEU*     1.3    77.4    -      -       -      +
    140B  GLN*     1.3    62.6    +      -       -      +
    142B  ALA*     3.2     3.2    +      -       -      +
    143B  ALA*     3.0    21.8    +      -       -      +
    169B  ILE*     3.8    13.2    -      -       +      +
    172B  LEU*     3.7    41.7    -      -       +      +
    173B  ILE*     3.9    20.6    -      -       +      +
    174B  PRO*     4.6     0.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 140 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    153A  HIS*     3.7     4.3    -      -       -      +
     81B  LEU*     4.5     5.0    -      -       +      +
     84B  VAL*     3.5    12.1    -      -       -      +
     85B  VAL*     5.7     0.4    -      -       -      -
     88B  LEU*     3.6    13.3    -      -       -      +
    121B  ILE*     3.3    40.9    -      -       +      +
    122B  PRO*     3.2    34.7    -      -       +      +
    136B  VAL      3.4     2.4    +      -       -      -
    137B  TYR*     3.1    21.7    +      -       +      +
    139B  VAL*     1.3    80.6    -      -       -      +
    141B  LEU*     1.3    57.0    +      -       -      +
    143B  ALA*     3.3     4.4    +      -       -      +
    144B  ASP*     2.9    65.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 141 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    141A  LEU      3.5     1.4    -      -       -      +
    142A  ALA*     3.7    16.6    -      -       +      +
    145A  GLY*     3.4    32.6    -      -       -      +
    146A  LEU*     3.9    16.4    -      -       +      +
    149A  HIS*     4.5    10.3    -      -       +      -
    165A  MET*     3.8    41.3    -      -       +      -
    169A  ILE*     4.3    13.9    -      -       +      -
    137B  TYR*     2.9    33.8    +      -       +      +
    138B  LEU*     3.3     7.4    +      -       -      +
    140B  GLN*     1.3    75.2    -      -       -      +
    142B  ALA*     1.3    62.8    +      -       -      +
    144B  ASP*     3.2     7.9    +      -       -      +
    145B  GLY      3.0    18.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 142 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    138A  LEU*     3.9    17.7    -      -       +      +
    141A  LEU*     3.7     5.2    -      -       +      +
    142A  ALA*     3.8    22.3    -      -       +      +
    138B  LEU      3.0    15.8    +      -       -      +
    139B  VAL*     3.2     5.6    +      -       -      +
    141B  LEU*     1.3    76.2    -      -       -      +
    143B  ALA*     1.3    58.1    +      -       -      +
    145B  GLY*     3.1     2.4    +      -       -      -
    146B  LEU      2.9    23.7    +      -       -      -
    169B  ILE*     3.6    30.1    -      -       +      +
    172B  LEU*     4.8     2.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 143 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     84B  VAL*     5.5     0.2    -      -       +      -
     85B  VAL*     4.1    30.5    -      -       +      +
     88B  LEU*     3.7    26.4    -      -       +      +
    139B  VAL      3.0    16.6    +      -       -      +
    140B  GLN*     3.5     7.0    -      -       -      +
    142B  ALA*     1.3    76.4    -      -       -      +
    144B  ASP*     1.3    58.9    +      -       -      +
    146B  LEU*     3.2     5.7    +      -       -      +
    147B  PHE*     3.0    27.0    +      -       -      +
    169B  ILE*     3.9     9.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 144 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    145A  GLY*     4.0    11.8    -      -       -      +
    152A  ILE*     3.6    20.3    -      -       +      +
    153A  HIS*     2.7    34.4    +      -       -      -
     88B  LEU*     3.4    10.9    -      -       -      +
    140B  GLN*     2.9    40.7    +      -       -      +
    141B  LEU*     3.2    15.9    +      -       -      +
    143B  ALA*     1.3    76.7    -      -       -      +
    145B  GLY*     1.3    62.7    -      -       -      +
    147B  PHE*     3.2     9.0    +      -       -      +
    148B  VAL*     3.1    27.4    +      -       -      +
   1002B  MBT      4.6     1.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 145 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    141A  LEU*     3.4    29.6    -      -       -      +
    144A  ASP*     4.1    10.5    -      -       -      +
    145A  GLY*     4.0     7.4    -      -       -      -
    141B  LEU      3.0    11.5    +      -       -      -
    142B  ALA      3.1     1.9    +      -       -      -
    144B  ASP*     1.3    77.3    -      -       -      +
    146B  LEU*     1.3    56.5    +      -       -      +
    148B  VAL*     3.7     4.4    -      -       -      +
    149B  HIS*     2.9    31.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 146 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    141A  LEU*     3.9    12.2    -      -       +      +
     85B  VAL*     5.9     0.4    -      -       +      +
     88B  LEU      4.5     0.9    -      -       -      +
     89B  ALA*     3.9    22.7    -      -       +      +
    142B  ALA      2.9    12.4    +      -       -      +
    143B  ALA*     3.2     8.3    +      -       -      +
    145B  GLY*     1.3    75.8    -      -       -      +
    147B  PHE*     1.3    63.7    +      -       -      +
    148B  VAL      3.3     0.5    +      -       -      -
    149B  HIS*     3.4    10.8    +      -       -      +
    157B  LEU*     3.6    31.4    -      -       +      -
    162B  ARG*     3.0    44.4    +      -       +      +
    165B  MET*     4.3    11.2    -      -       +      -
    166B  LEU*     3.9    29.6    -      -       +      +
    169B  ILE*     4.0    16.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 147 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    152A  ILE*     4.5    10.1    -      -       +      -
     88B  LEU*     3.2    38.3    +      -       +      +
     90B  GLU      3.5    18.4    -      -       -      -
     91B  ASN*     3.5     7.3    +      -       -      -
     92B  VAL*     3.0    68.4    +      -       +      +
     96B  GLU*     4.3     3.4    -      -       -      -
    100B  LEU*     4.4     8.7    -      -       +      -
    143B  ALA      3.0    11.1    +      -       -      +
    144B  ASP      3.3     9.0    -      -       -      +
    146B  LEU*     1.3    77.7    -      -       -      +
    148B  VAL*     1.3    68.1    +      -       +      +
   1002B  MBT      3.3    54.7    -      +       -      -
----------------------------------------------------------
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Residues in contact with VAL 148 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     97A  LEU*     6.6     0.2    -      -       +      -
    144A  ASP      5.0     0.2    -      -       -      +
    148A  VAL*     3.9    23.1    -      -       +      -
    152A  ILE*     4.0    27.1    -      -       +      -
     92B  VAL*     4.4    13.0    -      -       +      -
     97B  LEU*     4.7     7.4    -      -       +      -
    144B  ASP      3.1    16.5    +      -       -      +
    145B  GLY*     3.7     8.1    -      -       -      +
    147B  PHE*     1.3    86.3    -      -       +      +
    149B  HIS*     1.3    68.4    +      -       -      +
    150B  ASP      3.3     2.5    -      -       -      -
    151B  TYR*     2.9    23.4    +      -       +      +
    152B  ILE*     3.4    31.3    +      -       +      -
----------------------------------------------------------
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Residues in contact with HIS 149 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    124A  THR*     5.5     0.2    -      -       +      -
    137A  TYR*     2.6    42.8    +      +       -      -
    141A  LEU*     4.0     7.9    -      -       +      -
    145B  GLY      2.9    16.8    +      -       -      +
    146B  LEU*     3.4    15.5    +      -       -      +
    147B  PHE      3.5     0.4    +      -       -      -
    148B  VAL*     1.3    75.8    -      -       -      +
    150B  ASP*     1.3    78.1    +      -       -      +
    151B  TYR      3.0     0.7    +      -       -      -
    152B  ILE*     3.2     3.5    +      -       -      -
    153B  HIS*     3.0    62.7    +      +       +      +
    155B  ASP*     3.2    27.1    -      -       +      -
    157B  LEU*     3.4    24.8    -      -       +      +
    162B  ARG*     4.3     3.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 150 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    104A  PRO*     5.6     5.4    -      -       -      +
     91B  ASN*     3.5    27.5    -      -       -      +
    148B  VAL      3.1     1.4    +      -       -      -
    149B  HIS*     1.3    96.3    +      -       -      +
    151B  TYR*     1.3    61.8    +      -       +      +
    153B  HIS      3.5    13.7    -      -       -      +
    156B  VAL*     3.5    33.5    -      -       +      +
    157B  LEU      3.2    16.7    +      -       -      +
    162B  ARG*     3.2    20.0    +      -       -      -
   2001B  GOL      5.5     0.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 151 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     97A  LEU*     5.8     0.4    -      -       +      -
    100A  LEU      3.5    19.4    -      -       -      +
    101A  ILE*     4.0    31.9    -      -       +      +
    104A  PRO*     6.0     1.3    -      -       -      +
     91B  ASN*     3.3    26.0    +      -       -      -
     92B  VAL*     2.7    40.2    +      -       +      -
     93B  SER*     4.0     0.2    -      -       -      -
     94B  ARG*     3.3    32.1    +      -       +      +
     97B  LEU*     3.5    31.0    -      -       +      -
    148B  VAL*     2.9    14.0    +      -       +      +
    150B  ASP*     1.3    81.2    -      -       +      +
    152B  ILE*     1.3    64.7    +      -       +      +
    153B  HIS      3.6     0.9    -      -       -      -
   2001B  GOL      3.0    13.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 152 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     97A  LEU*     3.9    27.8    -      -       +      -
    100A  LEU*     4.0    15.7    -      -       +      -
    117A  ASN*     4.9     0.5    -      -       -      +
    144A  ASP*     3.7    38.1    -      -       +      +
    147A  PHE*     4.6     8.5    -      -       +      -
    148A  VAL*     4.2    14.4    -      -       +      -
   1001A  MBT      3.7    16.7    -      -       -      -
    148B  VAL*     3.4    28.7    +      -       +      +
    149B  HIS*     3.9     4.5    -      -       -      +
    151B  TYR*     1.3    81.7    -      -       +      +
    153B  HIS*     1.3    69.9    +      -       +      +
   2001B  GOL      2.8    26.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with HIS 153 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    117A  ASN*     4.6     5.5    +      -       -      -
    121A  ILE*     3.6    33.2    -      -       +      +
    137A  TYR*     3.9     8.4    +      -       -      +
    140A  GLN*     3.9    16.9    -      -       +      +
    144A  ASP*     2.6    31.6    +      -       -      -
   1001A  MBT      5.9     3.6    -      -       -      -
    149B  HIS*     3.0    51.5    +      +       +      +
    150B  ASP*     3.5    18.9    -      -       -      +
    151B  TYR      4.5     0.2    -      -       -      -
    152B  ILE*     1.3    90.4    +      -       +      +
    154B  ASP*     1.3    58.6    +      -       -      +
    155B  ASP*     3.3     8.8    +      -       +      +
    156B  VAL*     6.0     0.3    -      -       -      +
   2001B  GOL      3.9     9.5    +      -       -      -
----------------------------------------------------------
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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