Contacts of the helix formed by residues 164 - 185 (chain D) in PDB entry 1Z6Z


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 TRP 164 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101D  LEU*     4.8     6.1    -      -       +      -
    104D  VAL*     3.5    24.7    -      -       +      +
    156D  CYS*     3.5    33.0    -      -       -      -
    161D  PHE*     3.1    31.9    +      +       +      +
    162D  LYS      3.6    10.8    +      -       -      -
    163D  GLY*     1.3    86.3    -      -       -      +
    165D  ALA*     1.3    57.0    +      -       -      +
    166D  LEU      3.4     2.0    -      -       -      -
    167D  TYR*     3.3    16.6    +      +       +      -
    168D  CYS*     2.9    35.4    +      -       -      -
    203D  GLN*     5.9     3.4    -      -       -      -
    206D  ALA*     3.7    28.7    -      -       +      -
    210D  SER*     3.1    25.2    +      -       -      -
    211D  VAL      6.2     0.2    -      -       -      -
    215D  MET*     4.0    23.8    -      -       -      +
    219D  LEU*     4.1    12.1    -      -       +      -
    409D   CL      4.6    10.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 165 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    177C  LEU*     3.7    13.9    -      -       +      +
    180C  VAL*     3.8    22.3    -      -       +      +
    184C  GLU*     4.8     2.7    -      -       -      +
    108D  PHE*     3.9    28.5    -      -       +      -
    111D  LEU*     4.0    16.6    -      -       +      +
    163D  GLY      3.5     3.6    +      -       -      -
    164D  TRP*     1.3    75.2    -      -       -      +
    166D  LEU*     1.3    63.1    +      -       -      +
    168D  CYS*     4.0     0.9    -      -       -      +
    169D  ALA*     3.0    26.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 166 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    129C  LEU*     3.8    25.4    -      -       +      -
    177C  LEU*     5.0     0.2    -      -       +      -
    101D  LEU      5.0     2.9    -      -       -      +
    102D  GLY*     5.2     7.0    -      -       -      -
    103D  ASP      5.3     4.5    -      -       -      +
    111D  LEU*     4.1    25.1    -      -       +      +
    116D  GLN*     5.0     7.2    -      -       +      +
    117D  VAL*     4.1    16.6    -      -       +      -
    120D  TYR*     3.3    47.9    -      -       +      -
    121D  TRP*     3.7    29.3    -      -       +      -
    164D  TRP      3.4     0.4    -      -       -      -
    165D  ALA*     1.3    78.7    -      -       -      +
    167D  TYR*     1.3    58.9    +      -       -      +
    169D  ALA*     3.9     1.1    -      -       -      +
    170D  GLY      2.9    24.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 167 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    100D  SER      3.6    12.6    -      -       -      -
    101D  LEU*     3.7    32.4    +      -       +      +
    120D  TYR*     3.3    18.6    +      -       -      -
    124D  ASN*     5.9     0.2    -      -       -      -
    154D  SER*     3.8     2.3    -      -       -      -
    156D  CYS*     3.6    30.1    -      -       +      -
    164D  TRP*     3.3    17.9    +      +       +      +
    166D  LEU*     1.3    80.0    -      -       -      +
    168D  CYS*     1.3    61.9    +      -       -      +
    170D  GLY*     3.7     0.7    -      -       -      -
    171D  LYS*     2.9    40.2    +      -       +      +
    202D  MET*     4.1    13.6    -      -       -      -
    409D   CL      3.0    32.2    -      -       +      +
    804D  NAP      2.7    39.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with CYS 168 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    176C  MET*     3.5    18.6    -      -       +      +
    180C  VAL*     4.1     5.2    -      -       +      -
    156D  CYS*     3.5    32.3    -      -       -      +
    159D  GLN      3.7    21.1    -      -       -      -
    160D  PRO*     4.1     1.1    -      -       -      -
    161D  PHE*     3.8    18.2    -      -       -      -
    164D  TRP*     2.9    33.8    +      -       -      +
    165D  ALA      4.0     2.0    -      -       -      +
    167D  TYR*     1.3    72.2    -      -       -      +
    169D  ALA*     1.3    57.9    +      -       -      +
    171D  LYS      3.3     1.2    +      -       -      -
    172D  ALA*     2.9    30.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 169 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    173C  ALA*     3.7    16.7    -      -       +      +
    176C  MET*     3.7    12.0    -      -       -      +
    177C  LEU*     3.7    29.6    -      -       +      +
    121D  TRP*     3.9    15.0    -      -       +      -
    165D  ALA      3.0    19.1    +      -       -      +
    168D  CYS*     1.3    75.3    -      -       -      +
    170D  GLY*     1.3    57.7    +      -       -      +
    172D  ALA*     3.3     1.4    +      -       -      +
    173D  ALA*     2.9    30.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 170 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    120D  TYR*     4.7     6.5    -      -       -      -
    121D  TRP*     3.9    10.2    -      -       -      -
    124D  ASN*     5.3     2.5    -      -       -      -
    125D  LEU*     3.4    16.4    -      -       -      +
    166D  LEU      2.9    17.6    +      -       -      -
    167D  TYR      3.7     0.9    -      -       -      -
    169D  ALA*     1.3    75.1    -      -       -      +
    171D  LYS*     1.3    58.0    +      -       -      +
    173D  ALA*     3.3     0.7    +      -       -      -
    174D  ARG*     2.9    39.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 171 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99D  GLY*     5.3     2.8    -      -       -      -
    124D  ASN*     5.6     2.3    +      -       -      -
    151D  ASN*     5.0     0.2    +      -       -      -
    152D  ILE      3.0    27.3    +      -       -      +
    153D  SER*     4.2    14.1    -      -       -      +
    154D  SER*     4.0    13.0    -      -       -      -
    156D  CYS*     4.2     0.7    -      -       +      -
    157D  ALA*     3.6    27.2    -      -       +      +
    167D  TYR*     2.9    38.4    +      -       +      +
    168D  CYS      3.8     1.3    -      -       -      +
    170D  GLY*     1.3    73.0    -      -       -      +
    172D  ALA*     1.3    67.2    +      -       -      +
    174D  ARG*     3.4    26.7    +      -       +      +
    175D  ASP*     3.0    26.5    +      -       -      +
    804D  NAP      2.9    39.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 172 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    172C  ALA*     4.0    16.6    -      -       +      +
    176C  MET*     3.9    21.3    -      -       +      -
    157D  ALA*     3.6    23.7    -      -       -      +
    168D  CYS      2.9    17.0    +      -       -      +
    169D  ALA      3.7     3.8    -      -       -      +
    171D  LYS*     1.3    77.2    -      -       -      +
    173D  ALA*     1.3    61.9    +      -       -      +
    175D  ASP*     3.5     3.9    +      -       -      +
    176D  MET*     3.1    23.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 173 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    169C  ALA*     3.6    33.6    -      -       +      +
    173C  ALA*     4.0     8.2    -      -       +      +
    125D  LEU*     3.5    27.6    -      -       +      -
    169D  ALA      2.9    17.4    +      -       -      +
    172D  ALA*     1.3    73.4    -      -       -      +
    174D  ARG*     1.3    58.8    +      -       -      +
    176D  MET*     3.1     2.6    +      -       -      +
    177D  LEU*     2.9    34.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 174 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     96D  ASN*     3.2    25.3    +      -       -      +
     98D  ALA      3.8    18.5    +      -       -      -
    123D  LEU      5.1     0.6    +      -       -      -
    124D  ASN*     2.8    41.9    +      -       -      +
    125D  LEU*     3.9     6.0    -      -       +      +
    128D  MET*     3.6    32.7    -      -       +      +
    151D  ASN*     2.9    40.9    +      -       -      +
    152D  ILE      3.4     9.1    +      -       -      -
    170D  GLY      2.9    26.5    +      -       -      +
    171D  LYS*     3.6    28.2    -      -       -      +
    173D  ALA*     1.3    75.1    -      -       -      +
    175D  ASP*     1.3    62.9    +      -       -      +
    177D  LEU*     3.3     9.7    +      -       -      +
    178D  PHE*     3.1    26.0    +      -       -      +
    804D  NAP      4.4     1.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 175 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    151D  ASN*     3.1    14.2    +      -       -      -
    153D  SER*     2.5    25.8    +      -       -      -
    157D  ALA*     3.7    12.2    -      -       +      +
    158D  LEU*     4.7     4.9    -      -       +      +
    171D  LYS      3.0    13.3    +      -       -      +
    172D  ALA*     3.7     5.2    -      -       -      +
    174D  ARG*     1.3    75.8    -      -       -      +
    176D  MET*     1.3    57.8    +      -       -      +
    178D  PHE      3.4     1.2    +      -       -      -
    179D  GLN*     3.0    40.1    +      -       -      +
    192D  ASN*     3.4    20.2    +      -       -      +
    252D  HIS*     2.8    32.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 176 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    156C  CYS      3.8     6.7    -      -       -      +
    157C  ALA      3.5    25.8    -      -       -      +
    158C  LEU      3.7    23.1    -      -       -      +
    159C  GLN      3.8     1.8    -      -       -      +
    160C  PRO*     4.0    21.1    -      -       +      -
    168C  CYS*     3.5    41.7    -      -       +      +
    169C  ALA*     3.6     2.2    -      -       -      +
    172C  ALA*     3.9     9.6    -      -       +      -
    172D  ALA      3.1    18.3    +      -       -      +
    173D  ALA      3.1     3.6    +      -       -      +
    175D  ASP*     1.3    73.8    -      -       -      +
    177D  LEU*     1.3    65.7    +      -       -      +
    179D  GLN*     3.1    18.9    +      -       -      +
    180D  VAL*     2.9    22.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 177 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108C  PHE*     3.7    13.0    -      -       +      -
    121C  TRP*     4.7    10.5    -      -       +      -
    165C  ALA*     3.6    36.6    -      -       +      +
    166C  LEU      4.5     0.7    -      -       -      +
    169C  ALA*     3.6    12.1    -      -       +      +
    125D  LEU*     4.7     9.0    -      -       +      +
    128D  MET*     4.1    22.2    -      -       -      -
    129D  LEU*     4.1    35.7    -      -       +      -
    173D  ALA      2.9    19.0    +      -       -      +
    174D  ARG*     3.5     9.9    -      -       -      +
    176D  MET*     1.3    75.6    -      -       -      +
    178D  PHE*     1.3    66.5    +      -       +      +
    180D  VAL*     3.2     9.5    +      -       -      +
    181D  LEU      3.0    23.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 178 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108C  PHE*     4.5     8.7    -      +       -      -
     96D  ASN*     3.4    23.8    -      -       -      -
    128D  MET*     3.6    21.5    -      -       +      -
    132D  THR*     3.6    28.9    -      -       +      -
    149D  VAL*     3.7    15.3    -      -       +      -
    150D  VAL      3.7     5.2    -      -       -      -
    151D  ASN*     3.5    33.7    -      -       +      -
    174D  ARG      3.1    10.5    +      -       -      +
    175D  ASP      3.8     0.4    -      -       -      +
    177D  LEU*     1.3    83.4    -      -       +      +
    179D  GLN*     1.3    60.2    +      -       -      +
    181D  LEU*     3.4     4.3    +      -       +      +
    182D  ALA*     2.9    24.9    +      -       -      +
    190D  VAL*     3.4    31.8    -      -       +      +
    191D  LEU      4.3     2.2    -      -       -      -
    192D  ASN*     3.4    21.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 179 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    158C  LEU      4.9     2.8    +      -       -      +
    160C  PRO*     3.9    29.3    -      -       +      +
    175D  ASP*     3.0    32.3    +      -       -      +
    176D  MET*     3.1    25.0    +      -       -      +
    178D  PHE*     1.3    75.2    -      -       -      +
    180D  VAL*     1.3    61.8    +      -       -      +
    182D  ALA*     3.4     8.8    +      -       -      +
    183D  LEU*     3.3    24.1    +      -       -      +
    192D  ASN*     4.4     1.9    -      -       -      +
    250D  GLY*     3.6    22.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 180 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    160C  PRO*     3.8    21.8    -      -       +      -
    161C  PHE      3.4    22.7    -      -       -      +
    163C  GLY      4.3     0.2    -      -       -      +
    165C  ALA*     3.8    26.5    -      -       +      +
    168C  CYS*     3.9    24.7    -      -       +      -
    176D  MET*     2.9    18.8    +      -       -      +
    177D  LEU      3.5     7.2    -      -       -      +
    179D  GLN*     1.3    74.6    -      -       -      +
    181D  LEU*     1.3    65.0    +      -       -      +
    183D  LEU*     3.0     8.2    +      -       -      +
    184D  GLU*     3.0    39.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 181 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108C  PHE*     3.6    48.9    -      -       +      -
    109C  VAL*     5.4     0.4    -      -       +      -
    132D  THR*     3.9     8.7    -      -       +      -
    136D  LEU*     3.9    13.0    -      -       +      -
    149D  VAL*     3.7    30.3    -      -       +      -
    177D  LEU      3.0    12.1    +      -       -      +
    178D  PHE*     3.6    13.2    -      -       +      +
    180D  VAL*     1.3    76.5    -      -       -      +
    182D  ALA*     1.3    58.2    +      -       -      +
    184D  GLU*     4.4     4.0    -      -       -      +
    185D  GLU*     2.8    56.7    +      -       +      +
    188D  VAL*     4.9     0.9    -      -       +      -
    190D  VAL*     4.0     9.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 182 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    178D  PHE      2.9    17.8    +      -       -      +
    179D  GLN      3.6     6.5    -      -       -      +
    180D  VAL      3.3     0.2    -      -       -      -
    181D  LEU*     1.3    77.1    -      -       -      +
    183D  LEU*     1.3    62.9    +      -       +      +
    185D  GLU      3.8    13.3    -      -       -      +
    186D  PRO*     4.0     6.8    -      -       -      +
    190D  VAL*     3.8    11.2    -      -       +      +
    249D  SER*     3.7    23.4    +      -       -      +
    250D  GLY*     3.7    25.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 183 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    160C  PRO*     3.4    44.0    -      -       +      +
    161C  PHE*     4.2     7.6    -      -       +      -
    162C  LYS*     3.6    39.3    +      -       +      +
    179D  GLN      3.3     9.0    +      -       -      +
    180D  VAL*     3.0     9.2    +      -       -      +
    182D  ALA*     1.3    79.0    -      -       +      +
    184D  GLU*     1.3    63.3    +      -       -      +
    186D  PRO*     4.1    11.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 184 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    107C  GLY*     3.5     9.2    -      -       -      -
    108C  PHE*     3.0    36.1    +      -       +      +
    162C  LYS*     3.6    19.8    -      -       +      +
    163C  GLY*     2.7    40.8    +      -       -      +
    165C  ALA*     4.8     1.2    +      -       -      +
    211C  VAL*     6.0     0.3    -      -       -      +
    180D  VAL*     3.0    26.2    +      -       -      +
    181D  LEU*     3.8     5.4    -      -       -      +
    183D  LEU*     1.3    78.5    -      -       -      +
    185D  GLU*     1.3    75.6    +      -       +      +
    186D  PRO*     3.2     9.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 185 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108C  PHE*     5.7     0.9    -      -       +      -
    109C  VAL*     4.1    24.8    -      -       +      +
    136D  LEU*     5.2     0.4    -      -       +      -
    147D  ARG*     3.9    18.0    +      -       -      -
    181D  LEU*     2.8    31.9    +      -       +      +
    182D  ALA      3.8     7.0    -      -       -      +
    184D  GLU*     1.3    92.1    -      -       +      +
    186D  PRO*     1.3    61.2    -      -       -      +
    187D  ASN*     3.1     5.0    -      -       -      +
    188D  VAL*     2.9    42.4    +      -       +      +
----------------------------------------------------------
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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