Contacts of the helix formed by residues 103 - 123 (chain B) in PDB entry 3QLD


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 103 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     53A  PRO*     3.9     5.3    -      -       -      +
     57A  GLU*     3.0    29.7    +      -       -      +
     62A  THR*     5.2     1.9    -      -       -      +
     57B  GLU*     4.7     5.1    +      -       -      -
     58B  GLU*     3.3    24.5    -      -       -      +
     62B  THR*     6.0     0.5    -      -       -      -
     66B  MSE      3.6    43.5    -      -       +      +
     71B  LEU*     5.1     0.2    -      -       +      -
    100B  VAL*     4.1     9.3    -      -       +      +
    101B  ARG      3.0    21.4    +      -       -      +
    102B  GLY*     1.3    70.6    -      -       -      +
    104B  ARG*     1.3    65.3    +      -       -      +
    105B  MSE      3.3     2.0    -      -       -      -
    106B  SER*     3.3     2.8    +      -       -      -
    107B  VAL*     3.0    22.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 104 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     57B  GLU*     5.4     0.6    +      -       -      -
     58B  GLU*     3.3     6.1    +      -       -      +
    102B  GLY*     3.9    17.7    -      -       -      +
    103B  ASN*     1.3    79.6    -      -       -      +
    105B  MSE      1.3    52.4    +      -       -      +
    107B  VAL*     3.6     6.2    -      -       +      +
    108B  ALA*     2.7    35.7    +      -       -      +
    249B  ARG*     4.1     5.9    +      -       -      +
    250B  SER*     3.4    28.8    -      -       -      -
    271B  GLY      3.3     2.7    -      -       -      +
    272B  ARG      3.3    22.2    -      -       -      +
    273B  LEU      3.3    23.4    +      -       -      -
    274B  GLY*     3.4    10.2    -      -       -      -
    278B  ALA*     5.3     0.2    -      -       -      +
    281B  ARG*     4.9     3.0    -      -       -      +
    401B  SO4      2.8    42.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with MSE 105 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     47B  CYS*     3.7    16.6    -      -       -      -
     48B  VAL*     3.7    19.4    +      -       +      +
     49B  ALA*     3.6    36.6    -      -       +      +
     50B  LEU      5.1     0.2    -      -       -      -
     55B  TYR*     5.2     0.7    -      -       +      -
     56B  THR*     3.4    34.1    -      -       +      +
     58B  GLU*     2.9    22.5    +      -       -      +
    104B  ARG*     1.3    78.0    -      -       -      +
    106B  SER*     1.4    54.4    +      -       -      +
    108B  ALA*     3.5     2.9    +      -       -      +
    109B  ALA*     3.2    21.0    +      -       -      +
    271B  GLY*     3.3    18.8    -      -       -      +
    272B  ARG*     3.6    32.8    -      -       +      +
    298B  MSE      4.0    19.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 106 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     47B  CYS*     4.3     5.8    -      -       -      -
     58B  GLU*     3.2     9.8    +      -       -      -
     63B  ALA*     3.4    35.0    +      -       -      +
     66B  MSE      3.7    15.0    -      -       -      +
     67B  LEU*     3.7    17.1    -      -       -      +
     71B  LEU*     3.4    22.7    -      -       -      +
    103B  ASN*     3.7     6.0    +      -       -      -
    105B  MSE      1.4    70.2    -      -       -      +
    107B  VAL*     1.3    67.3    +      -       -      +
    109B  ALA*     3.1    14.3    +      -       -      +
    110B  ILE*     3.3     7.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 107 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     71B  LEU*     4.0    20.0    -      -       +      -
     94B  CYS*     3.9    27.6    -      -       +      -
     97B  LEU*     4.0    30.8    -      -       +      +
    100B  VAL*     4.7     7.4    -      -       +      +
    102B  GLY      4.3     7.2    -      -       -      +
    103B  ASN      3.0    19.5    +      -       -      +
    104B  ARG*     3.6    10.1    -      -       +      +
    106B  SER*     1.3    76.5    -      -       -      +
    108B  ALA*     1.3    62.1    +      -       -      +
    110B  ILE*     3.1     6.6    +      -       -      +
    111B  GLU*     3.0    18.9    +      -       -      +
    274B  GLY*     4.0    10.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 108 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46B  GLU      6.2     0.2    -      -       -      +
    104B  ARG      2.7    21.8    +      -       -      +
    105B  MSE      3.6     5.2    -      -       -      +
    106B  SER      3.3     0.2    -      -       -      -
    107B  VAL*     1.3    74.1    -      -       -      +
    109B  ALA*     1.3    54.6    -      -       -      +
    111B  GLU*     4.4     0.7    -      -       -      -
    112B  MSE      2.8    44.0    +      -       -      +
    271B  GLY*     3.5    23.6    -      -       -      +
    274B  GLY      3.6    10.5    -      -       -      -
    275B  GLY*     3.4    22.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 109 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     33B  VAL*     3.8    23.2    -      -       +      +
     45B  SER*     2.6    27.0    +      -       -      +
     46B  GLU      4.7     5.1    +      -       -      -
     47B  CYS*     3.8    23.1    -      -       +      -
     67B  LEU*     4.8     4.0    -      -       +      -
    105B  MSE      3.2    12.2    +      -       -      +
    106B  SER*     3.1    12.4    +      -       -      +
    108B  ALA*     1.3    75.0    -      -       -      +
    110B  ILE*     1.3    63.5    +      -       -      +
    112B  MSE      5.5     0.2    -      -       -      -
    113B  ALA*     3.2    13.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 110 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      7B  LEU*     6.4     0.2    -      -       +      -
     33B  VAL*     5.0     9.0    -      -       +      -
     35B  LEU*     4.4     2.9    -      -       +      +
     67B  LEU*     3.8    19.7    -      -       +      -
     71B  LEU*     3.6    43.7    -      -       +      +
     72B  VAL*     4.2    11.2    -      -       +      +
     75B  PHE*     3.9    42.0    -      -       +      -
     93B  VAL*     4.2     8.5    -      -       +      -
     97B  LEU*     4.4    11.2    -      -       +      -
    106B  SER      3.3     3.1    +      -       -      +
    107B  VAL      3.1     6.9    +      -       -      +
    109B  ALA*     1.3    76.0    -      -       +      +
    111B  GLU*     1.3    66.0    +      -       -      +
    113B  ALA*     3.3     6.6    +      -       -      +
    114B  VAL*     3.1    22.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 111 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     90B  PRO      4.5     5.0    -      -       -      +
     91B  ARG*     5.8     0.3    -      -       -      -
     93B  VAL*     4.2    22.9    -      -       +      +
     94B  CYS*     3.8    27.8    -      -       -      +
     97B  LEU*     6.4     0.2    -      -       +      -
    107B  VAL      3.0    15.5    +      -       -      +
    108B  ALA      3.9     1.8    -      -       -      +
    110B  ILE*     1.3    76.5    -      -       -      +
    112B  MSE      1.3    68.9    +      -       -      +
    114B  VAL*     3.2     4.5    +      -       -      +
    115B  TRP*     3.0    40.6    +      -       +      +
    274B  GLY      4.2     4.9    -      -       -      +
    275B  GLY*     3.3     5.9    -      -       -      -
    276B  PHE      2.7    25.0    +      -       -      -
    277B  GLY*     2.8    28.6    +      -       -      -
    278B  ALA      5.4     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with MSE 112 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45B  SER*     4.0    13.7    -      -       -      -
     46B  GLU      5.3     8.7    -      -       -      +
     48B  VAL*     6.6     0.2    -      -       -      -
    108B  ALA*     2.8    36.0    +      -       -      +
    109B  ALA*     5.5     0.2    -      -       -      -
    111B  GLU*     1.3    85.8    -      -       -      +
    113B  ALA*     1.3    62.3    +      -       -      +
    115B  TRP*     3.4     2.4    +      -       -      +
    116B  ASP*     2.9    28.9    +      -       -      +
    270B  PRO*     4.3    12.3    -      -       +      -
    271B  GLY*     4.5    11.4    -      -       -      +
    275B  GLY*     3.8    17.0    -      -       -      -
    276B  PHE*     3.7    30.3    -      -       +      -
    304B  GLY*     5.8     0.9    -      -       -      +
    307B  HIS*     3.5    38.4    -      -       +      +
    308B  GLY      5.4     0.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 113 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     33B  VAL*     3.9    14.8    -      -       +      +
     35B  LEU*     3.7    19.7    -      -       +      +
     43B  GLY*     3.8     4.2    -      -       -      +
     44B  TRP      3.9    13.2    -      -       -      -
     45B  SER*     3.5    16.0    -      -       -      +
    109B  ALA      3.2    19.9    +      -       -      +
    110B  ILE      3.7     3.8    -      -       -      +
    112B  MSE      1.3    76.0    -      -       -      +
    114B  VAL*     1.3    60.1    +      -       -      +
    116B  ASP*     3.6     1.0    -      -       -      +
    117B  TRP*     2.8    31.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 114 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      2B  LEU*     4.6     1.6    -      -       +      -
     35B  LEU*     3.6    10.5    -      -       +      -
     75B  PHE*     3.5    36.1    -      -       +      -
     88B  VAL*     3.9    23.8    -      -       +      -
     90B  PRO*     4.0    10.8    -      -       +      -
     93B  VAL*     3.5    27.6    -      -       +      -
    110B  ILE      3.1    15.8    +      -       -      +
    111B  GLU      3.6     7.2    -      -       -      +
    112B  MSE      3.2     0.4    -      -       -      -
    113B  ALA*     1.3    74.8    -      -       -      +
    115B  TRP*     1.3    67.1    +      -       -      +
    117B  TRP*     3.6     8.5    -      -       +      -
    118B  TYR*     2.9    21.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with TRP 115 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     90B  PRO*     3.6    32.0    +      -       +      -
     91B  ARG*     3.7    39.2    -      -       +      +
    111B  GLU*     3.0    55.4    +      -       +      -
    112B  MSE      3.4     5.8    +      -       -      +
    114B  VAL*     1.3    77.9    -      -       -      +
    116B  ASP*     1.3    64.7    +      -       -      +
    118B  TYR*     3.2     6.9    +      +       -      +
    119B  ALA*     3.0    23.7    +      -       -      +
    126B  LEU*     3.7    17.8    -      -       +      +
    129B  LEU*     4.3    24.2    -      -       +      +
    130B  LEU*     3.9    29.6    -      -       +      -
    276B  PHE*     3.6    23.4    -      +       +      +
    277B  GLY*     4.2     4.4    -      -       -      +
    280B  LEU*     4.9    11.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 116 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     42B  GLU      4.4     0.5    -      -       -      +
     43B  GLY*     3.3     7.3    -      -       -      -
     44B  TRP      2.9    37.5    +      -       -      +
    112B  MSE      2.9    19.0    +      -       -      +
    113B  ALA      3.6     3.1    -      -       -      +
    114B  VAL      3.2     0.2    -      -       -      -
    115B  TRP*     1.3    77.4    -      -       -      +
    117B  TRP*     1.3    63.2    +      -       -      +
    119B  ALA      3.3     1.9    +      -       -      -
    120B  ALA*     3.1    18.5    +      -       -      +
    126B  LEU*     4.0    10.5    -      -       -      +
    307B  HIS*     2.8    21.3    +      -       -      +
    354B  GLY*     3.3    15.5    -      -       -      -
    355B  VAL*     2.9    34.5    +      -       -      +
    356B  ALA      4.1     2.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with TRP 117 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      1B  SER      5.1     8.5    -      -       -      -
      2B  LEU*     3.6    30.7    -      -       +      -
     35B  LEU*     4.9     4.3    -      -       +      -
     37B  ASP*     2.9    33.5    +      -       +      +
     41B  ILE*     3.6    28.6    -      -       +      +
     42B  GLU      3.9     4.9    -      -       -      -
     43B  GLY*     3.4    16.7    -      -       -      +
     87B  ASP*     6.1     0.9    -      -       +      -
     88B  VAL*     3.5    45.5    -      -       +      -
    113B  ALA      2.8    21.8    +      -       -      +
    114B  VAL*     3.6    13.9    -      -       +      +
    116B  ASP*     1.3    74.4    -      -       -      +
    118B  TYR*     1.3    82.8    +      +       +      +
    120B  ALA*     3.1     2.9    +      -       -      +
    121B  ARG*     2.8    49.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 118 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     87B  ASP*     6.6     0.2    -      -       +      -
     88B  VAL      3.8    13.7    -      -       -      -
     89B  ASP*     5.5     0.2    -      -       -      -
     90B  PRO*     3.6    36.6    -      -       +      -
    114B  VAL      2.9    17.9    +      -       -      +
    115B  TRP*     3.2     8.7    +      +       -      +
    117B  TRP*     1.3    94.3    -      +       +      +
    119B  ALA*     1.3    57.7    +      -       -      +
    121B  ARG*     3.3     3.5    +      -       +      +
    122B  THR*     2.9    63.5    +      -       +      +
    124B  GLN*     4.1     6.7    +      -       -      -
    129B  LEU*     4.0    21.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 119 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    115B  TRP      3.0    13.3    +      -       -      +
    116B  ASP      3.6     4.9    -      -       -      +
    117B  TRP      3.2     0.2    -      -       -      -
    118B  TYR*     1.3    77.1    -      -       -      +
    120B  ALA*     1.3    56.5    -      -       -      +
    122B  THR*     3.9     4.0    -      -       -      -
    123B  GLY*     2.8    26.5    +      -       -      -
    124B  GLN      3.1    28.3    +      -       -      +
    126B  LEU*     3.8    20.9    -      -       +      -
    129B  LEU*     3.9     7.2    -      -       +      -
    353B  ALA*     3.6     3.3    -      -       -      +
    354B  GLY*     3.5    19.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 120 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41B  ILE*     3.7    16.4    -      -       +      +
     42B  GLU      3.5    23.8    -      -       -      +
    116B  ASP      3.1     9.8    +      -       -      +
    117B  TRP      3.1     8.7    +      -       -      +
    119B  ALA*     1.3    76.0    -      -       -      +
    121B  ARG*     1.3    62.0    +      -       -      +
    123B  GLY*     3.4    10.2    +      -       -      -
    353B  ALA*     3.1    18.1    +      -       -      +
    354B  GLY*     4.6     2.0    -      -       -      -
    356B  ALA*     5.6     2.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 121 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      1B  SER*     4.8     5.9    +      -       -      -
     37B  ASP*     2.8    32.1    +      -       -      -
     39B  ASP*     2.8    34.1    +      -       -      +
     41B  ILE*     3.8    15.5    -      -       -      +
    117B  TRP*     2.8    44.6    +      -       +      +
    118B  TYR*     3.6     7.4    -      -       +      +
    120B  ALA*     1.3    74.2    -      -       -      +
    122B  THR*     1.3    65.3    +      -       +      +
    123B  GLY      3.7     0.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with THR 122 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    118B  TYR*     2.9    56.0    +      -       +      +
    119B  ALA*     3.4     7.4    +      -       -      -
    121B  ARG*     1.3    82.8    -      -       +      +
    123B  GLY*     1.3    61.5    +      -       -      +
    124B  GLN*     2.9    35.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 123 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    119B  ALA      2.8     9.8    +      -       -      -
    120B  ALA      3.4     7.0    +      -       -      -
    121B  ARG      3.3     3.8    +      -       -      -
    122B  THR*     1.3    80.3    -      -       -      +
    124B  GLN*     1.3    57.3    +      -       -      +
    125B  PRO*     4.2     3.6    -      -       -      +
    353B  ALA*     3.6    14.5    -      -       -      +
----------------------------------------------------------
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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