Contacts of the helix formed by residues 91 - 112 (chain D) in PDB entry 1UDY


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 CYS 91 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     35D  ILE*     3.8    15.9    -      -       +      +
     39D  ALA*     3.9    11.2    -      -       +      -
     42D  TYR*     6.3     0.9    -      -       -      -
     87D  LEU      3.3     4.3    +      -       -      +
     88D  ALA      3.1     7.2    +      -       -      -
     90D  GLY*     1.3    82.6    -      -       -      +
     92D  THR*     1.3    56.3    +      -       -      +
     93D  GLY*     3.0    22.4    -      -       -      -
     94D  VAL*     3.3    21.9    -      -       +      +
     95D  GLN*     3.0    27.2    +      -       -      +
    217D  GLN*     6.0     0.2    -      -       -      -
    219D  CYS*     4.6     4.3    -      -       -      -
    364D  LYS*     3.3    28.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 92 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     88D  ALA*     3.5    28.4    +      -       +      +
     91D  CYS*     1.3    70.0    -      -       -      +
     93D  GLY*     1.3    59.6    +      -       -      +
     94D  VAL      3.4     0.2    -      -       -      -
     95D  GLN*     3.7     8.7    -      -       -      +
     96D  THR*     2.4    35.5    +      -       -      -
    217D  GLN*     3.5    10.2    +      -       -      +
    262D  GLY      3.8     0.2    -      -       -      +
    266D  LEU*     3.7    25.3    -      -       +      +
    364D  LYS*     4.8     1.6    -      -       -      +
    368D  ASP*     3.5    29.0    +      -       -      +
    372D  TYR*     3.1    28.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 93 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91D  CYS*     3.0    12.4    -      -       -      -
     92D  THR*     1.3    83.8    +      -       -      +
     94D  VAL*     1.3    62.9    +      -       -      +
     96D  THR      3.5     5.0    +      -       -      -
     97D  ALA*     3.5     8.7    +      -       -      +
    217D  GLN*     3.8    27.9    -      -       -      +
    219D  CYS*     3.6    14.1    -      -       -      -
    220D  SER*     3.8    13.8    -      -       -      -
    364D  LYS*     5.1     0.6    -      -       -      +
    368D  ASP*     5.1     0.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 94 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     30D  PHE*     5.7     0.7    -      -       +      -
     35D  ILE*     4.2    24.7    -      -       +      -
     39D  ALA*     5.8     1.8    -      -       -      -
     42D  TYR*     5.5     4.5    -      -       +      -
     49D  PRO*     4.4    12.8    -      -       +      -
     52D  LEU*     4.0    37.0    -      -       +      -
     53D  LEU*     4.4     3.5    -      -       +      +
     87D  LEU*     6.3     0.2    -      -       +      -
     91D  CYS*     3.3    26.3    -      -       +      +
     93D  GLY*     1.3    76.2    -      -       -      +
     95D  GLN*     1.3    62.5    +      -       -      +
     97D  ALA*     3.2    14.3    +      -       -      +
     98D  ILE*     3.3    24.1    +      -       +      +
    219D  CYS*     4.0    14.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 95 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     35D  ILE*     5.9     0.4    -      -       -      +
     84D  THR*     3.3    28.6    -      -       +      +
     87D  LEU*     3.9    12.8    -      -       +      -
     88D  ALA*     3.7    28.0    -      -       -      +
     91D  CYS      3.0    17.0    +      -       -      +
     92D  THR*     3.6     7.5    +      -       -      +
     94D  VAL*     1.3    79.1    -      -       -      +
     96D  THR*     1.3    66.3    +      -       -      +
     98D  ILE*     3.3    10.4    +      -       +      +
     99D  GLU*     2.8    49.0    +      -       +      +
    258D  PRO      4.6     0.7    -      -       -      +
    259D  VAL*     5.6     0.3    -      -       -      -
    262D  GLY*     4.2     3.2    -      -       -      -
    372D  TYR*     3.5    23.3    +      -       -      -
    375D  TYR*     5.5     0.4    +      -       -      -
   3400D  CS8      4.5     6.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 96 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     92D  THR      2.4    28.0    +      -       -      -
     93D  GLY      3.9     4.7    -      -       -      -
     94D  VAL      3.3     0.4    -      -       -      -
     95D  GLN*     1.3    82.0    +      -       -      +
     97D  ALA*     1.3    61.0    +      -       -      +
     99D  GLU*     4.5     3.4    -      -       -      -
    100D  ALA*     2.8    29.5    +      -       -      +
    168D  THR*     4.1    15.5    -      -       +      +
    217D  GLN*     3.3    23.5    +      -       -      +
    220D  SER*     4.1     5.8    -      -       -      +
    375D  TYR*     3.4    18.8    +      -       +      +
   3399D  FAD      6.0     0.4    -      -       +      -
   3400D  CS8      3.7    22.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 97 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48D  TYR*     4.1    23.6    -      -       +      +
     49D  PRO*     5.0     4.3    -      -       +      -
     53D  LEU*     4.0    15.7    -      -       +      -
     93D  GLY      3.5     8.3    +      -       -      +
     94D  VAL*     3.2    12.4    +      -       -      +
     96D  THR*     1.3    79.8    -      -       -      +
     98D  ILE*     1.3    64.6    +      -       -      +
    100D  ALA*     3.6     3.3    +      -       -      +
    101D  ASN      3.9     0.9    +      -       -      -
    130D  MET*     3.7     8.6    -      -       -      +
    168D  THR*     4.8     2.9    -      -       -      -
    169D  ASN*     3.0    29.5    -      -       -      +
    220D  SER*     4.5     6.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 98 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     30D  PHE*     5.1     2.5    -      -       +      -
     52D  LEU      5.2     0.4    -      -       -      +
     53D  LEU*     3.6    21.5    -      -       +      -
     56D  ALA*     3.7    28.0    -      -       +      -
     61D  LEU      3.8    19.3    -      -       -      +
     62D  MET*     3.8    18.0    -      -       +      +
     63D  ASN      5.7     0.3    +      -       -      -
     87D  LEU*     4.1    27.6    -      -       +      -
     94D  VAL*     3.3    19.0    +      -       +      +
     95D  GLN*     3.3     8.9    +      -       -      +
     97D  ALA*     1.3    77.8    -      -       -      +
     99D  GLU*     1.3    64.6    +      -       +      +
    101D  ASN*     3.0    28.8    +      -       -      +
    102D  THR*     4.0     2.4    +      -       -      -
    130D  MET*     4.5     6.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 99 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     80D  SER*     4.1    12.2    -      -       -      +
     83D  ILE*     6.0     1.2    -      -       -      +
     84D  THR*     2.4    32.5    +      -       +      +
     87D  LEU*     5.8     1.2    -      -       -      +
     95D  GLN*     2.8    34.1    +      -       +      +
     98D  ILE*     1.3    75.1    -      -       +      +
    100D  ALA*     1.3    61.8    +      -       -      +
    101D  ASN      3.0     7.1    +      -       -      -
    102D  THR*     3.1    32.8    +      -       -      +
    103D  LEU*     3.2     9.2    +      -       -      +
    258D  PRO*     3.8    21.7    -      -       +      +
   3400D  CS8      3.5    31.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 100 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     96D  THR      2.8    19.5    +      -       -      +
     98D  ILE      3.2     0.2    -      -       -      -
     99D  GLU*     1.3    76.6    -      -       -      +
    101D  ASN*     1.3    62.7    +      -       -      +
    103D  LEU*     3.5     8.0    -      -       +      +
    104D  GLY*     3.2    16.5    +      -       -      -
    131D  CYS      4.0     7.4    -      -       -      +
    132D  ALA*     4.8     2.8    -      -       -      -
    133D  TYR      5.2     0.3    +      -       -      -
    168D  THR*     3.4    33.2    -      -       +      +
    169D  ASN*     3.5    17.0    -      -       +      +
   3400D  CS8      3.5    13.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 101 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     62D  MET*     3.8    13.8    -      -       +      +
     63D  ASN*     3.0    29.3    +      -       -      +
     97D  ALA      3.9     0.2    +      -       -      -
     98D  ILE      3.0    16.4    +      -       -      +
     99D  GLU      3.0     0.4    -      -       -      -
    100D  ALA*     1.3    77.1    -      -       -      +
    102D  THR*     1.3    64.5    +      -       -      +
    104D  GLY      3.2     2.3    +      -       -      -
    105D  GLN*     3.1    28.8    +      -       -      +
    124D  MET*     3.8     6.1    -      -       -      +
    129D  LEU      3.4    21.2    +      -       -      -
    130D  MET*     3.2    23.0    -      -       -      +
    131D  CYS*     3.1    30.9    +      -       -      +
    169D  ASN*     3.8     1.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 102 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63D  ASN*     4.8    13.5    +      -       -      +
     64D  THR*     5.0     4.2    +      -       -      -
     65D  HIS*     4.6    18.8    +      -       +      -
     77D  ILE*     6.0     3.8    -      -       +      -
     80D  SER*     5.2    10.2    +      -       -      +
     98D  ILE      4.8     1.0    +      -       -      -
     99D  GLU*     3.1    30.2    +      -       -      +
    101D  ASN*     1.3    74.8    -      -       -      +
    103D  LEU*     1.3    68.4    +      -       -      +
    105D  GLN*     3.0    11.0    +      -       +      +
    106D  VAL*     3.0    38.0    +      -       +      +
    255D  THR*     4.8     6.7    -      -       +      -
    258D  PRO*     5.9     4.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 103 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99D  GLU      3.2     8.9    +      -       -      +
    100D  ALA*     3.5    11.4    -      -       +      +
    102D  THR*     1.3    79.8    -      -       -      +
    104D  GLY*     1.3    55.9    +      -       -      +
    106D  VAL      3.7     0.2    +      -       -      -
    107D  PRO*     3.0    25.3    -      -       -      +
    133D  TYR*     3.6    41.0    -      -       +      -
    251D  THR*     3.9    10.8    -      -       +      +
    252D  PHE*     4.9     0.9    -      -       +      -
    255D  THR*     3.8    34.7    -      -       +      +
    376D  GLU*     4.1     8.5    -      -       -      +
   3399D  FAD      4.2     3.8    -      -       -      +
   3400D  CS8      3.3    46.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 104 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    100D  ALA      3.2    11.7    +      -       -      -
    101D  ASN      3.2     3.7    +      -       -      -
    103D  LEU*     1.3    80.5    -      -       -      +
    105D  GLN*     1.3    57.8    +      -       -      +
    107D  PRO*     3.3    13.8    -      -       -      +
    108D  LEU*     3.9     3.3    -      -       -      +
    131D  CYS*     4.2     5.2    -      -       -      -
    132D  ALA      3.9    23.1    -      -       -      -
    133D  TYR*     4.4     5.6    -      -       -      +
    175D  TRP*     3.3    23.5    -      -       -      -
    177D  PHE*     4.2     2.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 105 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63D  ASN*     2.5    40.5    +      -       -      +
     65D  HIS*     5.1     3.6    -      -       -      +
     66D  ILE*     3.1    34.2    -      -       -      +
    101D  ASN*     3.1    21.2    +      -       -      +
    102D  THR*     3.0    10.6    +      -       -      +
    104D  GLY*     1.3    74.5    -      -       -      +
    106D  VAL*     1.3    67.5    +      -       -      +
    107D  PRO      3.2     2.5    -      -       -      -
    108D  LEU*     2.9    17.5    +      -       -      +
    109D  ILE*     3.1    17.6    +      -       +      +
    121D  LEU*     3.7    17.4    -      -       +      +
    124D  MET*     4.1     8.7    -      -       +      +
    131D  CYS*     3.9     9.9    -      -       -      -
    175D  TRP*     4.0     9.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 106 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65D  HIS*     4.6    15.0    -      -       -      +
     77D  ILE*     5.8     1.6    -      -       +      -
    102D  THR*     3.0    30.2    +      -       +      +
    105D  GLN*     1.3    75.4    -      -       -      +
    107D  PRO*     1.3    70.0    -      -       +      +
    109D  ILE*     2.8    20.7    +      -       +      +
    110D  ILE*     2.9    20.2    +      -       +      +
    251D  THR*     3.6    32.5    -      -       +      +
    254D  LYS*     4.0    27.8    -      -       +      +
    255D  THR*     4.0    15.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with PRO 107 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    103D  LEU      3.0    17.0    -      -       -      +
    104D  GLY      3.3    11.7    -      -       -      +
    106D  VAL*     1.3    92.0    -      -       +      +
    108D  LEU*     1.3    58.5    +      -       +      +
    110D  ILE*     4.4     0.9    -      -       +      -
    111D  GLY*     3.1    20.8    +      -       -      -
    133D  TYR*     3.6    23.8    -      -       +      -
    177D  PHE*     3.4    33.9    -      -       +      -
    238D  LEU*     3.3    16.8    -      -       +      +
    247D  ILE*     3.9     8.9    -      -       +      +
    251D  THR*     3.4    19.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 108 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    104D  GLY      3.9     7.4    -      -       -      +
    105D  GLN      2.9     7.5    +      -       -      +
    107D  PRO*     1.3    83.2    -      -       +      +
    109D  ILE*     1.3    64.3    +      -       -      +
    112D  GLY*     2.8    31.8    +      -       -      +
    116D  GLN*     4.8     9.4    -      -       +      +
    117D  GLN*     3.7    14.8    -      -       +      -
    120D  TYR*     3.7    25.6    -      -       +      -
    121D  LEU*     3.8    20.9    -      -       +      -
    175D  TRP*     3.5    42.0    -      -       +      -
    177D  PHE*     4.8     4.5    -      -       +      -
    198D  ILE*     4.6    12.8    -      -       +      -
    238D  LEU*     4.5    13.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 109 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65D  HIS*     3.1    55.0    -      -       +      +
     66D  ILE*     4.2     2.0    -      -       -      -
     67D  PRO*     4.0    17.7    -      -       +      -
    105D  GLN*     3.1    19.2    +      -       +      +
    106D  VAL*     2.8    16.0    +      -       +      +
    108D  LEU*     1.3    79.0    -      -       -      +
    110D  ILE*     1.3    66.6    +      -       +      +
    112D  GLY      5.0     0.7    +      -       -      +
    117D  GLN*     4.1    13.8    +      -       -      +
    121D  LEU*     3.8    16.6    -      -       +      -
    254D  LYS*     4.5     4.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 110 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    106D  VAL*     2.9    20.0    +      -       +      +
    107D  PRO*     4.2     4.7    -      -       +      +
    109D  ILE*     1.3    81.4    -      -       +      +
    111D  GLY*     1.3    59.8    +      -       -      +
    112D  GLY      4.0     0.4    -      -       -      -
    247D  ILE*     3.9    16.7    -      -       +      +
    250D  GLY*     3.7    35.0    -      -       -      +
    251D  THR*     3.8     8.5    -      -       -      +
    254D  LYS*     3.9    33.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 111 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    107D  PRO      3.1    17.0    +      -       -      -
    110D  ILE*     1.3    81.7    -      -       -      +
    112D  GLY*     1.3    60.9    +      -       -      +
    238D  LEU*     3.1    19.7    -      -       -      +
    239D  THR*     2.6    29.0    +      -       -      -
    247D  ILE*     4.3    11.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 112 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    107D  PRO      3.9     0.2    +      -       -      -
    108D  LEU*     2.8    20.5    +      -       -      +
    109D  ILE      5.1     1.0    -      -       -      +
    110D  ILE      5.4     0.2    -      -       -      -
    111D  GLY*     1.3    80.9    +      -       -      +
    113D  ASN*     1.3    63.4    +      -       -      -
    116D  GLN*     3.2    14.1    -      -       -      -
    117D  GLN*     2.9    18.9    +      -       -      -
    238D  LEU*     4.1     4.5    -      -       -      -
----------------------------------------------------------
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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