Contacts of the helix formed by residues 190 - 214 (chain D) in PDB entry 6N0M


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 SER 190 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    182D  LEU*     3.6     5.2    -      -       -      -
    188D  THR*     4.3     2.6    +      -       -      +
    189D  TRP*     1.3    75.7    -      -       -      +
    191D  LEU*     1.3    59.9    +      -       -      +
    192D  ALA*     3.9     8.8    +      -       -      +
    193D  GLU*     3.3    37.3    +      -       -      +
    194D  LEU*     2.9    27.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 191 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    178D  ILE*     5.0     0.9    -      -       +      -
    182D  LEU*     3.8    28.6    -      -       +      +
    190D  SER*     1.3    71.0    -      -       -      +
    192D  ALA*     1.3    69.5    +      -       -      +
    194D  LEU*     2.9     6.3    +      -       +      -
    195D  ILE*     2.8    31.3    +      -       +      +
    355D  LEU*     3.8    33.2    -      -       +      -
    475D  ILE*     4.2    32.1    -      -       +      -
    478D  TYR*     5.6     2.5    -      -       +      -
    479D  MET*     4.0    31.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 192 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    106D  PRO*     3.8    24.5    -      -       +      +
    190D  SER*     3.9     9.8    -      -       -      +
    191D  LEU*     1.3    79.6    -      -       -      +
    193D  GLU*     1.3    62.3    +      -       +      +
    195D  ILE*     4.1     3.0    -      -       -      +
    196D  GLN*     3.7    12.1    +      -       -      +
    355D  LEU*     4.1    20.7    -      -       -      +
    356D  TYR*     5.4     1.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 193 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    106D  PRO*     4.0    27.4    -      -       +      +
    107D  LEU*     3.8    13.8    -      -       +      +
    155D  LYS*     2.7    34.5    +      -       -      -
    188D  THR      3.9     1.0    -      -       -      +
    189D  TRP*     3.6    16.0    -      -       +      -
    190D  SER*     3.3    32.1    +      -       -      +
    191D  LEU      3.1     0.4    -      -       -      -
    192D  ALA*     1.3    77.5    -      -       +      +
    194D  LEU*     1.3    67.1    +      -       -      +
    196D  GLN*     3.5     5.5    +      -       -      +
    197D  ALA*     3.1    21.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 194 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    159D  LEU*     4.3    12.3    -      -       +      -
    178D  ILE*     4.2    22.9    -      -       +      -
    181D  LEU*     3.3    38.8    -      -       +      -
    182D  LEU*     4.1    21.1    -      -       +      -
    189D  TRP*     3.8    12.5    -      -       +      -
    190D  SER      2.9    21.7    +      -       -      +
    191D  LEU*     3.6     7.0    -      -       +      +
    193D  GLU*     1.3    74.6    -      -       -      +
    195D  ILE*     1.3    57.6    +      -       -      +
    197D  ALA*     3.0     4.2    +      -       +      +
    198D  LEU*     2.8    49.9    +      -       +      +
    475D  ILE*     4.7     7.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 195 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    191D  LEU*     2.8    24.2    +      -       +      +
    192D  ALA      4.1     4.3    -      -       -      +
    194D  LEU*     1.3    70.5    -      -       -      +
    196D  GLN*     1.3    65.7    +      -       -      +
    198D  LEU*     2.9    21.3    +      -       +      +
    199D  VAL*     2.9    14.0    +      -       +      +
    351D  LEU      5.2     0.4    -      -       -      +
    352D  ILE*     3.8    20.4    -      -       +      -
    355D  LEU*     3.8    32.5    -      -       +      -
    356D  TYR*     3.5    31.6    -      -       +      +
    472D  LEU*     4.3    17.7    -      -       +      -
    475D  ILE*     3.6    29.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 196 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99D  LEU*     5.8     0.8    -      -       -      +
    100D  LEU*     4.6     4.0    -      -       +      +
    105D  GLY*     3.9     6.7    -      -       -      -
    106D  PRO*     3.3    29.6    -      -       +      +
    107D  LEU*     3.1    41.4    +      -       +      +
    112D  ARG*     3.5    18.4    +      -       -      +
    192D  ALA      3.7     9.4    +      -       -      +
    193D  GLU      3.5     8.2    +      -       -      +
    195D  ILE*     1.3    77.1    -      -       -      +
    197D  ALA*     1.3    64.0    +      -       -      +
    199D  VAL*     3.1     3.8    +      -       -      +
    200D  LEU*     2.9    30.9    +      -       +      +
    356D  TYR*     3.4    43.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 197 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    107D  LEU*     4.0     5.6    -      -       +      +
    115D  ILE*     4.1     6.0    -      -       +      +
    159D  LEU*     4.1    14.6    -      -       +      -
    189D  TRP*     3.8    25.8    -      -       +      -
    193D  GLU      3.1    10.7    +      -       -      +
    194D  LEU*     3.0    15.3    +      -       +      +
    196D  GLN*     1.3    79.0    -      -       -      +
    198D  LEU*     1.3    56.5    +      -       -      +
    200D  LEU*     3.2     9.6    +      -       -      +
    201D  LEU*     2.9    35.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 198 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    162D  ILE*     3.9    24.7    -      -       +      -
    166D  LEU*     4.0    15.9    -      -       +      -
    178D  ILE*     5.0     0.2    -      -       +      -
    194D  LEU*     2.8    41.3    +      -       +      +
    195D  ILE*     2.9    12.8    +      -       +      +
    197D  ALA*     1.3    72.7    -      -       -      +
    199D  VAL*     1.3    51.9    +      -       +      +
    201D  LEU*     3.6    11.9    -      -       +      +
    202D  THR*     2.6    41.0    +      -       +      +
    468D  LEU*     4.7    11.4    -      -       +      -
    471D  ALA*     3.9    23.1    -      -       +      -
    472D  LEU*     5.3     2.5    -      -       +      +
    475D  ILE*     3.8    28.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 199 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     96D  LEU*     4.4     3.4    -      -       +      -
    100D  LEU*     3.7    27.8    -      -       +      -
    195D  ILE*     2.9    24.4    +      -       +      +
    196D  GLN      3.1     6.5    +      -       -      +
    198D  LEU*     1.3    72.5    -      -       +      +
    200D  LEU*     1.3    60.5    +      -       -      +
    202D  THR*     3.0     6.3    +      -       -      -
    203D  HIS*     2.8    33.5    +      -       -      +
    352D  ILE*     4.6     2.0    -      -       +      -
    356D  TYR*     4.0    22.4    -      -       +      -
    363D  LEU*     3.9    39.5    -      -       +      -
    464D  MET*     4.4     2.0    -      -       +      -
    468D  LEU*     4.4    11.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 200 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    100D  LEU*     3.9    27.8    -      -       +      +
    101D  LEU*     3.9    28.5    -      -       +      -
    107D  LEU*     4.3     4.9    -      -       +      -
    112D  ARG*     3.7    41.5    -      -       +      +
    115D  ILE*     3.8    23.6    -      -       +      -
    116D  ALA      5.2     0.2    -      -       -      +
    196D  GLN*     2.9    21.4    +      -       +      +
    197D  ALA*     3.5     7.2    -      -       -      +
    199D  VAL*     1.3    75.0    -      -       -      +
    201D  LEU*     1.3    55.4    -      -       -      +
    203D  HIS*     3.0     6.2    +      -       +      -
    204D  CYS*     2.9    46.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 201 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    115D  ILE*     3.9    13.9    -      -       +      +
    118D  MET*     5.2     2.0    -      -       +      -
    119D  ALA*     3.6    16.7    -      -       +      +
    159D  LEU*     4.1    25.8    -      -       +      +
    162D  ILE*     4.6     6.3    -      -       +      -
    163D  ASN*     3.2    44.0    -      -       +      +
    166D  LEU*     4.2    16.4    -      -       +      -
    197D  ALA      2.9    26.8    +      -       -      +
    198D  LEU*     3.6    14.6    -      -       +      +
    200D  LEU*     1.3    74.7    -      -       -      +
    202D  THR*     1.3    54.0    +      -       -      +
    205D  HIS*     2.8    45.6    +      -       +      -
----------------------------------------------------------
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Residues in contact with THR 202 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    166D  LEU*     3.8    31.2    -      -       +      -
    198D  LEU      2.6    25.6    +      -       -      +
    199D  VAL*     3.0    15.6    +      -       -      -
    201D  LEU*     1.3    73.9    -      -       -      +
    203D  HIS*     1.3    58.4    +      -       -      +
    205D  HIS*     3.6     7.6    -      -       -      +
    206D  SER*     2.9    32.2    +      -       -      -
    464D  MET*     3.5    24.4    -      -       -      +
    467D  ALA*     4.0    16.8    -      -       +      -
    468D  LEU*     3.9    17.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with HIS 203 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     93D  PHE*     4.4    15.3    -      +       -      -
     96D  LEU*     3.9    18.2    -      -       +      +
     97D  HIS*     4.2    20.9    +      -       +      -
    100D  LEU*     3.8    23.8    -      -       +      -
    101D  LEU*     4.8     9.4    -      -       +      -
    199D  VAL      2.8    20.1    +      -       -      +
    200D  LEU*     3.5     3.4    -      -       +      +
    202D  THR*     1.3    77.3    -      -       -      +
    204D  CYS*     1.3    62.3    +      -       -      +
    206D  SER*     2.8    22.0    +      -       -      -
    207D  LEU*     2.8    62.7    +      -       +      +
    366D  LYS*     4.9     6.1    -      -       -      -
    460D  LEU*     5.8     1.2    -      -       -      +
    464D  MET*     3.9    11.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with CYS 204 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101D  LEU*     5.3     1.6    -      -       -      -
    116D  ALA*     3.6    46.4    -      -       -      +
    119D  ALA*     4.0     8.3    -      -       +      -
    120D  ALA*     4.3     5.4    -      -       +      +
    128D  LEU*     3.7     8.8    -      -       +      +
    132D  HIS*     4.3    10.5    -      -       +      +
    200D  LEU*     2.9    27.5    +      -       -      +
    201D  LEU      3.9     0.2    -      -       -      -
    203D  HIS*     1.3    85.4    -      -       -      +
    205D  HIS*     1.3    55.1    +      -       -      +
    207D  LEU*     4.0    10.1    -      -       +      -
    208D  SER*     2.5    32.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with HIS 205 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    119D  ALA*     3.3    22.7    +      -       -      -
    123D  HIS*     4.3     4.5    -      +       -      -
    163D  ASN*     2.7    31.8    +      -       -      -
    166D  LEU*     3.7    13.4    +      -       +      +
    167D  ALA*     3.4    42.1    +      -       +      +
    201D  LEU*     2.8    38.2    +      -       +      +
    202D  THR*     3.6     9.4    -      -       -      +
    203D  HIS      3.3     0.2    -      -       -      -
    204D  CYS*     1.3    73.7    -      -       -      +
    206D  SER*     1.3    61.5    +      -       -      +
    208D  SER*     2.9    29.9    +      -       -      -
    209D  SER      3.2     1.2    +      -       -      -
    463D  ARG*     3.1    26.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 206 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    202D  THR      2.9    11.4    +      -       -      -
    203D  HIS*     2.8    22.7    +      -       -      -
    205D  HIS*     1.3    80.6    -      -       -      +
    207D  LEU*     1.3    55.2    +      -       -      +
    209D  SER*     3.1     8.8    +      -       -      -
    210D  PHE*     3.0    24.3    +      -       -      +
    460D  LEU*     3.1    45.1    -      -       -      +
    463D  ARG*     4.1    11.9    -      -       -      +
    464D  MET*     3.9    15.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 207 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     79D  LEU*     3.7    28.5    -      -       +      -
     83D  MET*     4.2    23.6    -      -       +      -
     93D  PHE*     4.3     7.2    -      -       +      -
     97D  HIS*     4.9     6.1    -      -       +      +
    101D  LEU*     6.1     0.9    -      -       +      -
    128D  LEU*     3.7    20.2    -      -       +      -
    132D  HIS*     6.1     1.3    -      -       -      +
    203D  HIS*     2.8    62.6    +      -       +      +
    204D  CYS*     4.2     4.7    -      -       -      +
    206D  SER*     1.3    69.0    +      -       -      +
    208D  SER*     1.3    60.5    +      -       -      +
    210D  PHE*     3.3     4.9    +      -       +      +
    211D  VAL*     2.8    32.6    +      -       -      +
    460D  LEU*     4.4    12.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 208 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    120D  ALA*     4.0     5.7    -      -       -      -
    123D  HIS*     3.9    24.2    -      -       -      -
    125D  CYS*     3.9    23.6    -      -       -      +
    128D  LEU*     3.5    12.0    -      -       -      +
    204D  CYS      2.5    24.4    +      -       -      -
    205D  HIS*     2.9    13.4    +      -       -      -
    207D  LEU*     1.3    76.2    -      -       -      +
    209D  SER*     1.3    65.1    +      -       -      +
    211D  VAL*     3.3     0.3    +      -       -      +
    212D  PHE*     3.1    30.0    +      -       -      -
    432D  PRO*     4.5     0.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with SER 209 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    205D  HIS      3.2     1.6    +      -       -      -
    206D  SER*     3.1    12.8    +      -       -      -
    208D  SER*     1.3    77.6    -      -       -      +
    210D  PHE*     1.3    53.6    +      -       -      +
    212D  PHE*     3.7     0.9    -      -       -      +
    213D  GLY      2.8    31.7    +      -       -      -
    428D  VAL*     2.8    44.5    +      -       -      +
    429D  ALA*     3.9     0.2    -      -       -      -
    432D  PRO*     3.9     5.3    -      -       -      +
    459D  LEU*     4.1    12.6    -      -       -      -
    460D  LEU*     5.1     2.0    -      -       -      -
    463D  ARG*     3.1    30.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 210 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     79D  LEU*     3.6    33.0    -      -       +      -
     82D  VAL*     4.2     5.6    -      -       +      -
     83D  MET*     3.6    35.2    -      -       +      -
    206D  SER      3.0    12.3    +      -       -      +
    207D  LEU*     3.4    11.2    -      -       +      +
    208D  SER      3.2     0.2    -      -       -      -
    209D  SER*     1.3    76.9    -      -       -      +
    211D  VAL*     1.3    62.4    +      -       -      +
    214D  CYS*     3.1    43.5    +      -       -      +
    216D  ILE*     3.5    23.3    -      -       +      -
    453D  VAL*     4.2    12.1    -      -       +      -
    456D  ASN*     4.2    17.3    -      -       +      -
    457D  LEU*     4.3    10.8    -      -       +      -
    460D  LEU*     3.6    26.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 211 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     79D  LEU*     4.3    20.4    -      -       +      -
    125D  CYS*     4.0    12.3    -      -       -      -
    127D  TYR*     3.8    41.3    -      -       +      -
    128D  LEU*     4.3     6.5    -      -       +      -
    207D  LEU      2.8    25.1    +      -       -      +
    208D  SER      3.3     3.6    +      -       -      +
    210D  PHE*     1.3    72.0    -      -       -      +
    212D  PHE*     1.3    72.0    +      -       +      +
    215D  GLY*     3.0     4.2    +      -       -      -
    216D  ILE*     3.0    51.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 212 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    123D  HIS*     3.3    21.3    -      -       +      -
    124D  GLN*     3.5    21.1    -      -       +      -
    125D  CYS*     3.7    23.6    -      -       +      -
    126D  SER      5.0     1.6    -      -       -      -
    208D  SER*     3.1    26.7    +      -       -      +
    211D  VAL*     1.3    79.8    -      -       +      +
    213D  GLY*     1.3    65.3    +      -       -      +
    215D  GLY*     3.3     9.3    +      -       -      -
    237D  GLN*     3.3     8.7    -      -       -      +
    432D  PRO*     3.3    39.9    -      -       +      +
    433D  GLU*     3.7    21.8    -      -       +      -
    435D  THR*     3.6    15.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 213 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    209D  SER      2.8    16.2    +      -       -      -
    211D  VAL      3.2     0.2    -      -       -      -
    212D  PHE*     1.3    76.6    -      -       -      +
    214D  CYS*     1.3    56.2    +      -       -      +
    237D  GLN*     3.3    11.4    -      -       -      +
    424D  TYR*     2.7    26.6    +      -       -      -
    428D  VAL*     3.7    14.1    -      -       -      +
    435D  THR*     4.3     0.7    -      -       -      -
    440D  TYR*     3.6     6.8    -      -       -      -
    456D  ASN*     3.4    20.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with CYS 214 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     82D  VAL*     4.3    13.9    -      -       +      -
    210D  PHE*     3.1    38.4    +      -       -      +
    213D  GLY*     1.3    72.2    -      -       -      +
    215D  GLY*     1.3    55.5    +      -       -      +
    216D  ILE*     3.3     9.1    +      -       +      -
    235D  SER*     2.7    28.9    +      -       -      -
    237D  GLN*     3.5    10.8    -      -       -      +
    238D  SER*     4.2     4.8    +      -       -      +
    440D  TYR*     4.8     5.4    -      -       -      -
    453D  VAL*     4.1    16.8    -      -       -      -
    456D  ASN*     3.7    28.5    -      -       -      +
----------------------------------------------------------
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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