Contacts of the helix formed by residues 299 - 321 (chain D) in PDB entry 3ZXR


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 299 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    288D  LEU      2.6    28.6    +      -       -      -
    289D  MET      2.7    17.2    +      -       -      -
    290D  TYR      3.8    11.9    -      -       -      -
    291D  ASP*     3.5    13.9    -      -       -      +
    298D  LEU*     1.3    75.3    -      -       -      +
    300D  ASP*     1.3    60.7    +      -       -      +
    301D  THR*     3.4     4.2    +      -       -      -
    302D  ALA*     3.2    12.7    +      -       -      +
    303D  ARG*     2.9    29.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 300 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    291D  ASP*     5.2     4.8    +      -       -      +
    299D  SER*     1.3    72.8    -      -       -      +
    301D  THR*     1.3    66.7    +      -       -      +
    303D  ARG*     2.8    38.9    +      -       -      +
    304D  HIS*     3.0    44.7    +      -       +      -
----------------------------------------------------------
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Residues in contact with THR 301 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    124D  ILE*     4.6     7.0    -      -       +      -
    281D  LEU*     4.5    10.3    -      -       +      -
    288D  LEU*     4.1    23.2    +      -       +      +
    289D  MET*     5.4     2.5    -      -       -      -
    299D  SER*     3.3     8.3    +      -       -      -
    300D  ASP*     1.3    80.1    -      -       -      +
    302D  ALA*     1.3    56.9    +      -       -      +
    304D  HIS*     3.5     2.4    +      -       -      -
    305D  TYR*     3.0    27.0    +      -       -      +
    391D  ILE*     3.6    37.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 302 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    288D  LEU      4.6     0.6    +      -       -      -
    289D  MET*     3.4    55.6    -      -       +      +
    298D  LEU*     3.8    17.7    -      -       +      -
    299D  SER*     3.2     9.9    +      -       -      +
    301D  THR*     1.3    78.6    -      -       -      +
    303D  ARG*     1.3    63.0    +      -       -      +
    305D  TYR*     3.0     5.5    +      -       -      +
    306D  ILE*     3.0    28.5    +      -       +      +
    365D  LEU*     4.5     0.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 303 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    294D  GLY*     6.0     2.4    -      -       -      -
    295D  TYR*     6.4     1.1    -      -       -      -
    298D  LEU*     4.7    12.7    +      -       +      +
    299D  SER      2.9    14.6    +      -       -      +
    300D  ASP*     2.8    40.0    +      -       -      +
    302D  ALA*     1.3    74.9    -      -       -      +
    304D  HIS*     1.3    64.7    +      -       -      +
    306D  ILE*     3.3    10.8    +      -       -      +
    307D  GLY      2.8    22.2    +      -       -      -
    342D  TYR*     4.0    18.6    -      -       +      +
    396D  GLU*     2.9    37.0    +      -       -      -
    397D  PRO*     3.5    29.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with HIS 304 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    300D  ASP*     3.0    38.6    +      -       +      +
    301D  THR*     3.9     3.8    +      -       -      +
    303D  ARG*     1.3    77.7    +      -       -      +
    305D  TYR*     1.3    61.3    +      -       -      +
    307D  GLY*     3.3     0.9    +      -       -      -
    308D  GLY      2.9    22.2    +      -       -      -
    390D  GLY*     3.3    25.7    -      -       -      +
    391D  ILE*     3.8    13.6    +      -       +      +
    394D  LYS*     3.5    41.2    +      -       +      +
    395D  ILE      3.4    19.4    -      -       -      +
    396D  GLU*     2.8    29.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 305 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128D  ALA*     5.7     0.2    -      -       -      +
    130D  PHE*     4.4     3.5    -      -       -      -
    279D  GLN*     2.8    38.3    +      -       +      +
    280D  SER      6.2     0.4    -      -       -      -
    281D  LEU*     3.9    24.7    -      -       +      +
    289D  MET*     5.0     4.9    -      -       +      -
    301D  THR      3.0    14.1    +      -       -      +
    302D  ALA*     3.0    13.2    +      -       -      +
    304D  HIS*     1.3    71.9    -      -       -      +
    306D  ILE*     1.3    65.7    +      -       -      +
    308D  GLY*     3.1     3.8    +      -       -      -
    309D  LEU*     3.0    33.6    +      -       +      +
    365D  LEU*     3.5    23.1    -      -       +      -
    383D  MET      4.0     0.7    -      -       -      -
    384D  LEU*     3.5    32.7    -      -       +      +
    387D  GLY*     3.6    39.6    -      -       -      -
    388D  LEU      4.4     0.2    -      -       -      -
    391D  ILE*     3.9    13.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 306 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    298D  LEU*     3.8    17.9    -      -       +      -
    302D  ALA      3.0    18.3    +      -       -      +
    303D  ARG*     3.5     9.2    -      -       -      +
    305D  TYR*     1.3    74.7    -      -       -      +
    307D  GLY*     1.3    58.3    +      -       -      +
    309D  LEU*     3.1     9.3    +      -       -      +
    310D  LEU*     2.9    39.7    +      -       +      +
    342D  TYR*     3.8    39.7    -      -       +      -
    351D  VAL*     4.1    10.1    -      -       +      -
    353D  ILE*     3.7    30.1    -      -       +      -
    365D  LEU*     3.7    23.3    -      -       +      -
    397D  PRO*     4.4     4.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 307 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    303D  ARG      2.8    12.3    +      -       -      -
    304D  HIS      3.5     4.7    -      -       -      -
    305D  TYR      3.2     0.6    -      -       -      -
    306D  ILE*     1.3    76.6    -      -       -      +
    308D  GLY*     1.3    55.3    +      -       -      +
    310D  LEU*     4.4     1.4    -      -       -      +
    311D  HIS*     3.0    32.4    +      -       -      +
    395D  ILE*     3.5    25.7    -      -       -      +
    397D  PRO*     3.9    19.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 308 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    304D  HIS      2.9    10.9    +      -       -      -
    305D  TYR      3.1     3.5    +      -       -      -
    307D  GLY*     1.3    73.7    -      -       -      +
    309D  LEU*     1.3    55.5    -      -       -      +
    311D  HIS*     3.7     2.0    -      -       -      -
    312D  HIS*     2.8    44.9    +      -       -      +
    386D  ALA      3.3    25.6    -      -       -      -
    390D  GLY*     3.8    12.9    -      -       -      -
    395D  ILE*     4.5     1.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 309 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    279D  GLN*     4.4     1.1    -      -       -      +
    305D  TYR*     3.0    29.3    +      -       +      +
    306D  ILE*     3.1     9.2    +      -       -      +
    308D  GLY*     1.3    73.4    -      -       -      +
    310D  LEU*     1.3    63.3    +      -       +      +
    312D  HIS      3.8     0.7    -      -       -      -
    313D  ALA*     2.9    30.5    +      -       -      +
    316D  LEU*     3.8    25.5    -      -       +      +
    351D  VAL*     4.5     6.5    -      -       +      -
    365D  LEU*     3.7    30.7    -      -       +      -
    367D  PHE*     4.1    30.8    -      -       +      -
    383D  MET*     3.7    34.1    -      -       +      +
    386D  ALA*     4.2     2.0    +      -       +      -
    387D  GLY      4.5     0.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 310 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    306D  ILE*     2.9    33.6    +      -       +      +
    307D  GLY*     4.4     2.9    -      -       -      +
    309D  LEU*     1.3    78.4    -      -       -      +
    311D  HIS*     1.3    62.1    +      -       -      +
    313D  ALA*     3.5    14.0    -      -       +      +
    314D  PRO*     4.2     0.5    -      -       -      +
    340D  LEU*     3.6    47.3    -      -       +      +
    341D  VAL*     3.7     0.9    -      -       -      -
    342D  TYR*     3.7    26.9    -      -       +      +
    350D  CYS*     3.7    32.1    -      -       +      -
    351D  VAL*     4.0    12.1    -      -       +      -
    367D  PHE*     4.9     1.3    -      -       +      -
    397D  PRO*     4.7     8.5    -      -       +      -
    398D  GLN*     5.7     3.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with HIS 311 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    307D  GLY      3.0    21.3    +      -       -      +
    308D  GLY      3.8     1.8    -      -       -      +
    310D  LEU*     1.3    79.1    -      -       -      +
    312D  HIS*     1.3    92.5    +      +       -      +
    314D  PRO*     3.4    12.3    -      -       -      +
    395D  ILE*     3.9    28.1    -      -       +      +
    429D  ARG*     5.3     4.1    +      -       -      -
    433D  ASP*     5.8     1.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with HIS 312 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    308D  GLY*     2.8    27.8    +      -       -      +
    309D  LEU      4.4     0.2    -      -       -      +
    311D  HIS*     1.3    95.3    +      +       -      +
    313D  ALA*     1.3    65.0    +      -       -      +
    314D  PRO*     3.2     4.7    -      -       -      -
    315D  SER*     2.9     8.8    +      -       -      -
    316D  LEU*     2.8    22.1    +      -       +      -
    386D  ALA*     3.9    26.2    -      -       +      -
    389D  ASP*     2.7    30.7    +      -       +      -
    395D  ILE*     4.6     0.2    -      -       -      +
    433D  ASP*     4.6    11.8    +      -       -      -
    436D  TYR*     3.5    48.5    -      +       +      +
----------------------------------------------------------
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Residues in contact with ALA 313 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    309D  LEU      2.9    18.4    +      -       -      +
    310D  LEU*     3.5    12.6    -      -       +      +
    312D  HIS*     1.3    75.1    -      -       -      +
    314D  PRO*     1.4    71.2    -      -       +      +
    315D  SER      3.0     1.0    +      -       -      -
    316D  LEU*     3.9     9.2    -      -       +      -
    317D  LEU*     3.1    38.7    +      -       +      +
    340D  LEU*     3.7    26.9    -      -       +      -
    367D  PHE*     5.6     3.8    -      -       +      -
    420D  PRO*     5.2     1.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with PRO 314 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    310D  LEU      4.2     2.7    -      -       -      +
    311D  HIS      3.4    14.4    -      -       -      +
    312D  HIS      3.3     5.4    -      -       -      +
    313D  ALA*     1.4    92.8    -      -       +      +
    315D  SER*     1.3    56.2    +      -       -      +
    340D  LEU*     4.5    11.0    -      -       +      -
    420D  PRO*     4.3    14.9    -      -       +      +
    426D  VAL*     3.5    29.3    -      -       -      +
    429D  ARG*     3.6    45.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 315 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    312D  HIS*     2.9     6.9    +      -       -      +
    314D  PRO*     1.3    77.1    -      -       -      +
    316D  LEU*     1.3    67.6    +      -       -      +
    317D  LEU      3.1     2.5    -      -       -      -
    318D  ALA*     3.0    24.3    +      -       -      +
    319D  PHE*     5.1     0.9    -      -       -      -
    426D  VAL      4.3     4.7    -      -       -      -
    429D  ARG*     3.8    11.6    -      -       -      +
    430D  LEU*     3.8    22.6    -      -       -      +
    433D  ASP*     3.6    20.4    +      -       -      -
    436D  TYR*     2.7    38.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 316 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    309D  LEU*     3.8    32.1    -      -       +      +
    312D  HIS*     2.8    25.9    +      -       +      +
    313D  ALA*     3.9     3.6    -      -       -      -
    315D  SER*     1.3    73.5    +      -       -      +
    317D  LEU*     1.3    56.3    +      -       +      +
    318D  ALA      3.1     0.2    -      -       -      -
    319D  PHE*     3.0    23.0    +      -       -      +
    320D  THR*     3.2    21.0    +      -       +      +
    367D  PHE*     3.8    28.9    -      -       +      -
    382D  ALA*     3.5    44.2    -      -       +      +
    383D  MET*     3.6     3.1    -      -       -      +
    386D  ALA*     4.0     8.3    -      -       +      -
    436D  TYR*     3.4    11.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 317 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    313D  ALA*     3.1    29.4    +      -       +      +
    315D  SER      3.0     0.6    +      -       -      -
    316D  LEU*     1.3    75.7    -      -       +      +
    318D  ALA*     1.3    58.6    +      -       -      +
    319D  PHE      3.1     0.2    -      -       -      -
    320D  THR*     3.0    25.8    -      -       -      +
    321D  ASN*     2.7    42.9    +      -       -      +
    327D  TYR*     3.6    14.6    -      -       +      +
    330D  LEU*     4.1    16.6    -      -       +      -
    340D  LEU*     5.9     1.1    -      -       +      -
    367D  PHE*     4.3    11.2    -      -       +      -
    369D  SER*     3.3    30.7    -      -       -      +
    419D  THR*     5.0     4.5    -      -       +      -
    420D  PRO*     3.8    26.9    -      -       +      -
    426D  VAL*     4.2     6.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 318 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    315D  SER      3.0    16.6    +      -       -      +
    317D  LEU*     1.3    78.8    -      -       -      +
    319D  PHE*     1.3    58.3    +      -       +      +
    321D  ASN      4.8     0.7    -      -       -      -
    322D  PRO*     3.2    17.4    -      -       -      +
    423D  LEU*     4.9     0.2    -      -       -      -
    426D  VAL*     3.6    27.9    -      -       +      +
    427D  ILE*     3.9    13.2    -      -       +      +
    430D  LEU*     3.8    27.4    -      -       +      -
    451D  TRP*     3.0    19.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 319 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    315D  SER      5.1     0.7    -      -       -      -
    316D  LEU*     3.0     7.4    +      -       -      +
    318D  ALA*     1.3    80.5    -      -       +      +
    320D  THR*     1.3    61.6    +      -       -      +
    321D  ASN      3.4     0.7    -      -       -      -
    322D  PRO*     3.9    11.3    -      -       -      +
    374D  GLY*     5.5     0.2    -      -       -      -
    375D  ASN      4.6     4.7    +      -       -      +
    378D  LEU*     4.0    29.3    -      -       +      +
    379D  ALA*     3.6    15.6    +      -       -      +
    382D  ALA*     3.9    31.2    -      -       +      -
    430D  LEU*     3.8    31.0    -      -       +      -
    437D  LEU*     3.9    11.0    -      -       +      -
    443D  PHE*     3.7    28.3    -      +       -      -
    447D  LEU*     4.7     3.4    -      -       +      -
    448D  ILE*     4.6     7.6    -      -       +      -
    451D  TRP*     3.5    52.5    -      +       +      -
----------------------------------------------------------
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Residues in contact with THR 320 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    275D  MET*     5.3     0.5    -      -       -      +
    316D  LEU*     3.2    30.4    +      -       +      +
    317D  LEU*     3.0    24.4    -      -       -      +
    319D  PHE*     1.3    80.7    -      -       -      +
    321D  ASN*     1.3    76.9    +      -       -      +
    322D  PRO*     3.6     4.0    -      -       -      +
    367D  PHE*     4.2     3.6    -      -       +      -
    370D  PRO*     3.4    14.5    -      -       -      +
    371D  ASP      3.1    32.4    +      -       -      +
    379D  ALA*     4.3     9.3    -      -       -      +
    383D  MET*     3.8    28.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 321 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    317D  LEU*     2.7    20.1    +      -       +      +
    320D  THR*     1.3   102.1    +      -       -      +
    322D  PRO*     1.3    62.2    -      -       -      +
    323D  THR      3.4     2.5    -      -       -      -
    326D  SER*     3.4    13.5    +      -       -      -
    327D  TYR*     2.8    38.2    +      -       +      +
    329D  ARG*     3.9     4.6    -      -       -      +
    330D  LEU*     3.9    16.4    -      -       -      +
    369D  SER*     2.7    42.2    +      -       -      +
    371D  ASP*     3.4    16.9    +      -       -      -
    423D  LEU*     4.0     1.0    -      -       -      +
----------------------------------------------------------
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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