Contacts of the helix formed by residues 96 - 116 (chain C) in PDB entry 1TKK


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 96 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     55C  THR      5.8     0.8    +      -       -      -
     57C  ASP*     3.5    15.4    +      -       -      +
     61C  SER*     3.9    30.1    +      -       -      +
     65C  ALA*     4.0     2.3    -      -       -      +
     93C  LEU*     3.6    29.8    -      -       +      +
     94C  THR      3.0    20.4    +      -       -      -
     95C  GLY*     1.3    72.0    -      -       -      +
     97C  MET*     1.3    59.7    +      -       -      +
     98C  SER      3.2     3.4    -      -       -      -
     99C  ALA*     3.0    13.6    +      -       +      +
    100C  LYS*     2.9    27.0    +      -       -      +
     52H  LEU*     5.2     1.5    -      -       -      +
     56H  GLY*     2.8    31.0    +      -       -      +
     61H  SER*     5.6     0.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with MET 97 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     55C  THR*     5.5     5.6    +      -       +      +
     57C  ASP*     3.6     5.6    +      -       -      +
     90C  GLN*     4.0     9.6    -      -       -      +
     95C  GLY*     3.8    23.8    -      -       -      +
     96C  ASN*     1.3    77.7    -      -       -      +
     98C  SER*     1.3    56.7    +      -       -      +
    100C  LYS*     3.9    15.0    -      -       -      -
    101C  ALA*     3.0    23.7    +      -       -      +
    248C  PHE*     4.9    10.1    -      -       +      -
    249C  THR*     4.1    21.1    -      -       +      -
    250C  PRO*     6.5     0.2    -      -       +      -
    270C  MET      3.2    17.6    -      -       -      +
    271C  LYS*     3.4    23.8    -      -       -      +
    272C  ALA      3.6     7.2    -      -       -      +
    273C  GLY*     3.1    30.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 98 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48C  ALA*     3.2    22.6    -      -       -      +
     49C  PRO      4.4     3.9    +      -       -      -
     51C  THR*     4.4     0.3    +      -       -      -
     55C  THR*     3.3    20.3    +      -       -      +
     57C  ASP*     2.4    35.4    +      -       -      +
     62C  ILE*     4.1     4.3    -      -       -      -
     97C  MET*     1.3    75.7    -      -       -      +
     99C  ALA*     1.3    61.9    +      -       -      +
    101C  ALA*     3.4     1.7    +      -       -      +
    102C  ALA      3.2    17.8    +      -       -      -
    270C  MET*     3.5    27.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 99 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     57C  ASP*     4.5     0.4    +      -       -      +
     62C  ILE*     3.9    31.3    -      -       +      +
     65C  ALA*     3.8    28.9    -      -       +      -
     66C  ILE*     4.3     6.2    -      -       +      +
     70C  LEU*     4.5     5.2    -      -       +      -
     96C  ASN*     3.0    13.9    +      -       +      +
     98C  SER*     1.3    77.1    -      -       -      +
    100C  LYS*     1.3    63.3    +      -       -      +
    101C  ALA      3.4     0.5    +      -       -      -
    102C  ALA*     3.5     2.2    +      -       -      +
    103C  VAL*     3.4    27.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 100 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     70C  LEU*     4.4     4.7    -      -       +      -
     89C  ILE*     3.4    39.3    -      -       +      +
     90C  GLN*     3.3    33.5    +      -       -      +
     93C  LEU*     2.6    39.5    +      -       +      -
     94C  THR*     3.9     1.2    -      -       -      +
     95C  GLY      2.5    37.1    +      -       -      +
     96C  ASN*     2.9    15.1    +      -       +      +
     97C  MET*     3.8    18.8    -      -       -      +
     98C  SER      3.3     0.2    -      -       -      -
     99C  ALA*     1.3    75.6    -      -       -      +
    101C  ALA*     1.3    57.3    +      -       -      +
    103C  VAL*     3.7     0.7    +      -       -      +
    104C  GLU*     3.1    23.9    +      -       -      +
    273C  GLY*     3.2    18.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 101 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     97C  MET      3.0    15.5    +      -       -      +
     98C  SER      3.7     4.9    -      -       -      +
     99C  ALA      3.2     0.6    -      -       -      -
    100C  LYS*     1.3    76.3    -      -       -      +
    102C  ALA*     1.3    60.3    +      -       -      +
    104C  GLU*     3.2     1.9    +      -       -      +
    105C  MET*     2.9    35.0    +      -       -      +
    269C  LEU*     3.3    34.1    -      -       +      +
    270C  MET*     3.8    12.6    -      -       +      -
    273C  GLY      3.3     8.9    +      -       -      -
    274C  GLY*     3.4     8.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 102 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     32C  VAL*     5.2     0.4    -      -       +      +
     34C  VAL*     3.6    22.7    -      -       +      +
     46C  GLY*     3.4     8.1    -      -       -      -
     47C  GLU      3.3    36.3    -      -       -      +
     48C  ALA*     3.8     4.7    -      -       +      -
     62C  ILE*     5.5     0.2    -      -       +      -
     66C  ILE*     4.9     3.1    -      -       +      -
     98C  SER      3.2    14.6    +      -       -      +
     99C  ALA*     4.0     3.8    -      -       -      +
    100C  LYS      3.4     0.4    -      -       -      -
    101C  ALA*     1.3    76.4    -      -       -      +
    103C  VAL*     1.3    63.5    +      -       -      +
    105C  MET*     3.3    18.1    +      -       -      +
    106C  ALA*     3.4     6.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 103 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6C  ILE*     5.5     3.4    -      -       +      -
     34C  VAL*     4.5    14.4    -      -       +      -
     36C  ILE*     3.8     7.0    -      -       +      +
     66C  ILE*     3.6    34.5    -      -       +      -
     70C  LEU*     4.0    16.6    -      -       +      -
     74C  LEU*     3.7    30.5    -      -       +      -
     89C  ILE*     3.9    17.3    -      -       +      -
     99C  ALA      3.4    10.6    +      -       -      +
    100C  LYS      3.9     3.1    -      -       -      +
    101C  ALA      3.3     0.2    -      -       -      -
    102C  ALA*     1.3    78.0    -      -       -      +
    104C  GLU*     1.3    56.9    +      -       -      +
    106C  ALA*     3.1     5.9    +      -       -      +
    107C  LEU*     3.0    25.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 104 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     86C  LEU*     3.5    28.4    -      -       +      +
     89C  ILE*     4.1    10.5    -      -       +      -
     90C  GLN*     3.2    21.7    +      -       -      +
    100C  LYS      3.1    19.7    +      -       -      +
    101C  ALA      3.2     5.1    +      -       -      +
    103C  VAL*     1.3    73.8    -      -       -      +
    105C  MET*     1.3    64.0    +      -       -      +
    107C  LEU*     3.6     5.3    -      -       -      +
    108C  TYR*     3.0    39.6    +      -       -      -
    272C  ALA      5.2     0.2    -      -       -      +
    273C  GLY      3.2     7.8    -      -       -      +
    274C  GLY*     3.7     8.8    -      -       -      -
    275C  ILE*     2.8    24.8    +      -       -      -
    276C  SER*     2.9    27.8    +      -       -      -
    277C  GLY      4.6     0.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with MET 105 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45C  TRP      3.4     5.0    -      -       -      +
     46C  GLY*     3.7     8.1    -      -       -      -
     47C  GLU      3.4    26.9    -      -       -      +
    101C  ALA      2.9    17.3    +      -       -      +
    102C  ALA      3.4     6.1    -      -       -      +
    103C  VAL      3.2     0.2    -      -       -      -
    104C  GLU*     1.3    77.0    -      -       -      +
    106C  ALA*     1.3    56.7    +      -       -      +
    108C  TYR*     3.6     1.9    +      -       -      +
    109C  ASP*     3.1    27.0    +      -       -      +
    119C  LEU*     5.3     0.2    -      -       -      +
    269C  LEU*     3.9    27.1    -      -       +      -
    270C  MET*     3.4    33.7    -      -       +      -
    274C  GLY*     5.9     0.2    -      -       -      -
    275C  ILE*     4.8     9.8    -      -       +      +
    299C  GLU*     4.1     3.6    -      -       -      +
    302C  LEU*     5.0     1.3    -      -       -      +
    303C  GLY*     4.1    23.6    -      -       -      +
    306C  ALA*     3.8    23.8    -      -       +      -
    352C  LEU*     4.1     5.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 106 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     34C  VAL*     4.8     3.6    -      -       +      +
     36C  ILE*     3.3    26.2    -      -       +      +
     38C  TYR*     2.8    14.6    +      -       -      -
     44C  GLY*     3.5    26.8    -      -       -      +
     45C  TRP      3.3    18.4    -      -       -      +
     46C  GLY*     4.0     2.5    -      -       -      +
    102C  ALA      3.4     4.6    +      -       -      +
    103C  VAL*     3.1     5.4    +      -       -      +
    105C  MET*     1.3    77.2    -      -       -      +
    107C  LEU*     1.3    60.8    +      -       -      +
    109C  ASP*     3.6     2.3    -      -       -      +
    110C  GLY      3.1    15.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 107 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      3C  ILE*     3.8    19.3    -      -       +      -
     36C  ILE*     3.9     2.4    -      -       +      +
     38C  TYR*     3.3     6.6    +      -       -      +
     74C  LEU*     4.6     5.6    -      -       +      -
     79C  LEU*     3.6    25.3    -      -       +      +
     82C  TYR*     4.4    12.1    -      -       +      +
     85C  ILE*     3.5    37.5    -      -       +      -
     86C  LEU*     3.8    29.8    -      -       +      -
     89C  ILE*     4.2     4.0    -      -       +      -
    103C  VAL      3.0    15.3    +      -       -      +
    104C  GLU*     3.3     7.2    +      -       -      +
    106C  ALA*     1.3    76.2    -      -       -      +
    108C  TYR*     1.3    62.5    +      -       +      +
    110C  GLY*     3.3     1.9    +      -       -      -
    111C  TRP*     2.9    30.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 108 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     82C  TYR*     4.6    12.4    -      +       -      -
     86C  LEU*     3.5    25.8    -      -       +      +
    104C  GLU*     3.0    50.3    +      -       +      +
    105C  MET      4.0     2.2    -      -       -      +
    107C  LEU*     1.3    76.7    -      -       +      +
    109C  ASP*     1.3    66.6    +      -       -      +
    111C  TRP*     3.8    20.4    -      +       +      +
    112C  ALA*     3.0    26.2    +      -       -      +
    119C  LEU*     3.6    35.2    -      -       +      +
    123C  LEU*     4.1    13.5    -      -       +      -
    275C  ILE*     3.8    32.5    -      -       +      +
    276C  SER*     3.2    23.9    -      -       -      -
    279C  GLU*     4.5     6.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 109 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     43C  VAL      3.8     1.6    -      -       -      +
     44C  GLY*     3.2     6.8    -      -       -      -
     45C  TRP*     3.0    27.0    +      -       -      +
    105C  MET      3.1    19.7    +      -       -      +
    106C  ALA      3.6     7.2    -      -       -      +
    108C  TYR*     1.3    79.3    -      -       -      +
    110C  GLY*     1.3    57.4    +      -       -      +
    112C  ALA      3.4     0.2    +      -       -      -
    113C  GLN*     3.0    48.8    +      -       -      +
    119C  LEU*     4.6     1.5    -      -       -      +
    351C  GLY*     3.2     4.9    -      -       -      -
    352C  LEU*     2.8    48.9    +      -       +      +
    354C  ILE*     5.3     1.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 110 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      1C  MET*     3.9     3.3    -      -       -      +
     38C  TYR*     3.6    30.2    -      -       -      -
     44C  GLY*     4.5     0.2    -      -       -      -
     79C  LEU*     3.3    13.8    -      -       -      +
    106C  ALA      3.1     8.3    +      -       -      -
    107C  LEU      3.3     2.4    +      -       -      -
    109C  ASP*     1.3    79.4    -      -       -      +
    111C  TRP*     1.3    56.0    +      -       -      +
    113C  GLN*     3.5    10.5    -      -       -      +
    114C  MET*     3.1    23.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with TRP 111 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     79C  LEU*     3.4    34.6    +      -       +      +
     82C  TYR*     3.4    36.6    -      +       +      -
    107C  LEU*     2.9    18.2    +      -       +      +
    108C  TYR*     3.8    25.4    -      +       +      +
    109C  ASP      3.3     0.4    -      -       -      -
    110C  GLY*     1.3    75.9    -      -       -      +
    112C  ALA*     1.3    73.3    +      -       -      +
    114C  MET*     3.3    15.4    -      -       +      +
    115C  CYS*     3.3    31.7    +      -       -      -
    119C  LEU*     4.4     7.4    -      -       +      -
    122C  MET*     3.5    52.5    -      -       +      -
    123C  LEU*     4.5    11.0    -      -       +      -
    111D  TRP*     4.5     7.9    -      +       -      -
    121D  GLN      5.0     0.2    +      -       -      -
    122D  MET*     3.8    34.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 112 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108C  TYR      3.0    17.4    +      -       -      +
    111C  TRP*     1.3    75.4    -      -       -      +
    113C  GLN*     1.3    60.6    +      -       -      +
    115C  CYS*     3.1     3.0    +      -       -      +
    116C  GLY      2.9    23.7    +      -       -      -
    117C  LEU      3.2    27.7    +      -       -      +
    119C  LEU*     3.7    26.5    -      -       +      -
    122C  MET*     3.9    15.9    -      -       +      -
    351C  GLY*     3.8     9.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 113 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      1C  MET*     4.3     9.1    -      -       -      +
     38C  TYR*     6.2     0.2    -      -       -      -
     42C  ALA*     3.2    26.7    -      -       +      +
     43C  VAL      2.8    28.8    +      -       -      +
    109C  ASP*     3.0    39.9    +      -       -      +
    110C  GLY*     3.5     8.1    -      -       -      +
    112C  ALA*     1.3    75.0    -      -       -      +
    114C  MET*     1.3    64.0    +      -       -      +
    116C  GLY*     3.2    13.2    +      -       -      -
    349C  LYS*     6.6     0.4    -      -       -      -
    350C  PRO*     3.8    31.4    +      -       +      +
    351C  GLY*     3.8     2.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with MET 114 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      1C  MET*     3.6    42.5    -      -       +      +
     78C  SER*     5.9     0.2    -      -       -      -
     79C  LEU*     3.8    25.4    -      -       +      +
     80C  ALA*     4.4     3.4    -      -       -      +
    110C  GLY      3.1    12.9    +      -       -      +
    111C  TRP*     3.3    40.4    -      -       +      +
    113C  GLN*     1.3    77.5    -      -       -      +
    115C  CYS*     1.3    63.1    +      -       -      +
    116C  GLY*     3.2     1.7    +      -       -      -
    115D  CYS      5.2     2.4    -      -       -      +
    117D  LEU*     3.6    35.2    -      -       +      -
    122D  MET*     4.7     0.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with CYS 115 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    111C  TRP*     3.3    19.5    +      -       -      -
    112C  ALA      3.1     5.8    +      -       -      +
    114C  MET*     1.3    86.1    -      -       -      +
    116C  GLY*     1.3    61.8    +      -       -      +
    117C  LEU*     3.4     5.1    +      -       -      +
    122C  MET*     3.4    40.6    -      -       +      -
    114D  MET*     4.6     5.0    -      -       -      +
    115D  CYS*     3.6    31.4    -      -       +      +
    117D  LEU*     4.7     0.9    -      -       -      -
    122D  MET*     3.6    26.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 116 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    112C  ALA      2.9     4.2    +      -       -      -
    113C  GLN      3.2     9.8    +      -       -      -
    114C  MET      3.1     5.6    -      -       -      -
    115C  CYS*     1.3    78.7    -      -       -      +
    117C  LEU*     1.3    68.4    +      -       -      +
    118C  PRO*     4.8     0.2    -      -       -      +
    350C  PRO*     3.9    18.7    -      -       -      +
----------------------------------------------------------
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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