Contacts of the helix formed by residues 15 - 37 (chain C) in PDB entry 5W97


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 PRO 15 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8A  PHE*     3.7    27.8    -      -       +      -
     14C  SER*     1.3    90.2    -      -       -      +
     16C  TRP*     1.3    77.6    +      -       +      +
     17C  PRO      3.5     0.9    -      -       -      -
     18C  LEU*     3.3     8.8    +      -       -      +
     19C  THR*     3.2    21.7    +      -       -      +
     21J  HIS*     3.7    31.2    -      -       +      +
     32J  TYR*     3.5    34.5    -      -       +      -
     36J  MET*     3.9     7.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with TRP 16 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     96A  ARG*     4.9     2.5    -      -       -      -
     14C  SER*     3.3    15.9    +      -       -      -
     15C  PRO*     1.3    90.3    -      -       +      +
     17C  PRO*     1.4    67.0    -      -       +      +
     19C  THR*     3.3    16.4    +      -       +      -
     20C  GLY*     2.8    25.5    +      -       -      -
     53C  THR*     3.4    14.4    -      -       +      +
     56C  GLN*     2.9    54.9    -      -       +      +
     57C  TRP*     3.6    43.7    -      +       +      -
     59C  ARG*     4.0     3.6    -      -       -      -
     60C  ASP*     3.0    23.0    +      -       +      -
     21J  HIS*     3.9    20.5    -      +       +      +
     32J  TYR*     3.8    26.2    -      +       +      -
     35J  THR*     4.3    13.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with PRO 17 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     96A  ARG*     3.1    43.7    -      -       +      +
     99A  ASN*     3.7    18.2    -      -       +      +
    100A  MET*     3.5    36.3    -      -       +      +
    103A  TRP*     4.8     1.8    -      -       +      -
     14C  SER*     3.6    13.5    -      -       -      +
     16C  TRP*     1.4    93.0    -      -       +      +
     18C  LEU*     1.3    56.7    +      -       -      +
     20C  GLY*     3.3     0.7    +      -       -      -
     21C  ALA*     2.9    30.6    +      -       -      +
     57C  TRP*     3.9     7.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 18 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      7A  LEU*     4.1    45.1    +      -       +      +
      8A  PHE*     4.3    11.9    -      -       +      -
     99A  ASN*     4.9     0.6    -      -       -      +
    103A  TRP*     4.2    35.7    -      -       +      +
     15C  PRO*     3.3    11.7    +      -       +      +
     16C  TRP      3.3     0.6    -      -       -      -
     17C  PRO*     1.3    78.6    -      -       -      +
     19C  THR*     1.3    58.8    +      -       +      +
     21C  ALA*     3.2     5.5    +      -       +      +
     22C  LEU*     2.8    57.8    +      -       +      +
     36J  MET*     5.0     7.2    -      -       -      -
     40J  LEU*     6.0     2.0    -      -       +      -
    101J  CHD      4.7     8.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 19 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     15C  PRO      3.2    13.9    +      -       -      +
     16C  TRP*     3.3    22.1    +      -       +      -
     18C  LEU*     1.3    74.2    -      -       +      +
     20C  GLY*     1.3    61.8    +      -       -      +
     22C  LEU*     3.8     2.4    -      -       +      +
     23C  SER*     2.8    30.5    +      -       -      -
     53C  THR*     2.6    25.5    +      -       -      +
     35J  THR*     4.0    14.6    -      -       +      -
     36J  MET*     3.8    32.3    -      -       +      +
     39J  CYS*     3.7    23.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 20 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    100A  MET*     4.4     9.6    -      -       -      -
    607A  PGV      4.0    14.8    -      -       -      +
     16C  TRP      2.8    18.9    +      -       -      -
     17C  PRO      3.7     1.3    -      -       -      -
     19C  THR*     1.3    75.7    +      -       -      +
     21C  ALA*     1.3    57.8    +      -       -      +
     23C  SER*     2.8    21.0    +      -       -      -
     24C  ALA*     3.0    16.8    +      -       -      +
     53C  THR*     3.7    13.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 21 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    100A  MET*     4.5     2.2    -      -       +      +
    103A  TRP*     3.3    41.7    -      -       +      +
    104A  LEU*     3.7    17.9    -      -       +      +
    107A  PRO*     4.1     8.2    -      -       +      +
     17C  PRO      2.9    13.2    +      -       -      +
     18C  LEU*     3.2     8.0    +      -       +      +
     20C  GLY*     1.3    72.3    -      -       -      +
     22C  LEU*     1.3    69.5    +      -       +      +
     24C  ALA*     3.1     6.8    +      -       -      +
     25C  LEU*     3.1    18.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 22 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    103A  TRP*     6.5     0.2    -      -       +      -
    107A  PRO*     5.2    10.1    -      -       +      -
     18C  LEU*     2.8    40.9    +      -       +      +
     19C  THR*     4.0     4.5    -      -       +      +
     21C  ALA*     1.3    78.2    -      -       +      +
     23C  SER*     1.3    62.3    +      -       -      +
     25C  LEU*     3.0    24.4    +      -       +      +
     26C  LEU*     3.1    18.3    +      -       -      +
     36J  MET*     6.2     1.1    -      -       -      -
     39J  CYS*     3.9    25.6    -      -       +      +
     40J  LEU*     4.2    18.6    -      -       +      -
     43J  THR*     3.7    32.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 23 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     19C  THR      2.8    17.6    +      -       -      -
     20C  GLY*     2.8    22.9    +      -       -      -
     21C  ALA      3.1     0.2    -      -       -      -
     22C  LEU*     1.3    77.9    -      -       -      +
     24C  ALA*     1.3    54.9    +      -       -      +
     26C  LEU*     3.3     5.1    +      -       -      +
     27C  MET*     3.1    35.0    +      -       -      +
     46C  GLY*     4.1     1.2    -      -       -      -
     49C  THR*     3.2    29.8    -      -       -      -
     50C  ASN*     3.7    30.6    +      -       -      -
     39J  CYS*     4.9     0.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 24 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    104A  LEU*     3.7    23.1    -      -       +      -
    152A  LEU*     3.8    16.4    -      -       +      -
    607A  PGV      4.0    15.2    -      -       +      +
     20C  GLY      3.0    13.4    +      -       -      +
     21C  ALA      3.3     9.9    -      -       -      +
     23C  SER*     1.3    75.2    +      -       -      +
     25C  LEU*     1.3    60.3    +      -       -      +
     27C  MET*     4.0    10.5    -      -       -      +
     28C  THR*     2.7    32.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 25 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    107A  PRO*     3.9    28.5    -      -       +      +
    110A  LEU*     4.0    28.7    -      -       +      -
    111A  LEU*     4.1    28.3    -      -       +      -
    152A  LEU*     4.2     3.7    -      -       -      +
     21C  ALA      3.1     6.3    +      -       -      +
     22C  LEU*     3.0    17.7    +      -       +      +
     24C  ALA*     1.3    75.7    -      -       -      +
     26C  LEU*     1.3    59.5    +      -       +      +
     28C  THR*     2.9    15.8    +      -       -      -
     29C  SER*     2.9    25.2    +      -       -      +
     43J  THR*     4.4    22.9    -      -       +      +
     46J  SER*     4.1    18.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 26 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     22C  LEU      3.1    14.9    +      -       -      +
     23C  SER*     3.8     2.9    -      -       -      +
     24C  ALA      3.3     0.4    -      -       -      -
     25C  LEU*     1.3    78.8    -      -       +      +
     27C  MET*     1.3    59.3    -      -       -      +
     29C  SER*     4.0     3.3    +      -       -      -
     30C  GLY*     2.8    26.0    +      -       -      -
     42C  LEU*     3.5    21.3    -      -       +      +
     45C  ILE*     3.9    22.7    -      -       +      -
     46C  GLY*     3.5    13.9    -      -       -      +
     49C  THR*     3.9    19.7    -      -       -      +
     38J  LEU      4.3     2.9    -      -       -      +
     39J  CYS*     4.3    13.7    -      -       -      +
     42J  GLY*     3.3    38.6    -      -       -      +
     43J  THR*     3.6    10.3    -      -       -      +
     46J  SER*     4.3     6.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with MET 27 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    607A  PGV      4.3    38.4    -      -       +      -
     23C  SER*     3.1    28.6    +      -       -      +
     24C  ALA*     4.0     9.4    -      -       -      +
     25C  LEU      3.4     0.2    -      -       -      -
     26C  LEU*     1.3    76.3    -      -       -      +
     28C  THR*     1.3    57.1    +      -       -      +
     30C  GLY*     3.6     0.2    -      -       -      -
     31C  LEU*     2.9    35.2    +      -       +      +
     43C  LEU*     3.9    12.8    -      -       +      +
     46C  GLY*     3.6    17.7    -      -       -      -
     47C  LEU*     3.7    24.0    -      -       +      +
     50C  ASN*     3.6    38.1    -      -       +      +
    307C  DMU      5.5     4.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 28 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    111A  LEU*     3.6    13.4    -      -       -      +
    148A  PHE*     3.6    43.8    -      -       +      +
    151A  HIS*     5.6     0.7    -      -       +      -
    152A  LEU*     3.8    23.1    -      -       +      +
    607A  PGV      4.4    13.9    -      -       +      -
     24C  ALA      2.7    24.3    +      -       -      +
     25C  LEU*     2.9    15.6    +      -       -      -
     27C  MET*     1.3    73.0    -      -       -      +
     29C  SER*     1.3    62.0    +      -       -      -
     31C  LEU*     3.4     3.8    +      -       -      -
     32C  THR*     3.0    26.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 29 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    111A  LEU*     4.2    18.6    -      -       -      +
    145A  LEU*     5.2     2.5    -      -       -      -
     25C  LEU*     2.9    29.4    +      -       -      +
     26C  LEU*     4.0     1.7    +      -       -      -
     28C  THR*     1.3    73.9    +      -       -      +
     30C  GLY*     1.3    57.7    +      -       -      +
     32C  THR*     3.2     9.9    +      -       -      -
     33C  MET*     2.9    30.3    +      -       -      +
     42C  LEU*     3.4    22.2    -      -       -      +
     46J  SER*     3.5    14.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 30 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     26C  LEU      2.8    22.9    +      -       -      -
     27C  MET      3.6     1.1    -      -       -      -
     29C  SER*     1.3    77.5    +      -       -      +
     31C  LEU*     1.3    56.6    +      -       -      +
     33C  MET*     3.2     4.6    +      -       -      +
     34C  TRP*     2.8    27.0    +      -       -      +
     39C  SER      4.0     3.1    -      -       -      +
     42C  LEU*     3.5    19.9    -      -       -      +
     43C  LEU*     3.6    15.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 31 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    148A  PHE*     3.8    26.9    -      -       +      -
    607A  PGV      4.0    25.4    -      -       +      -
     27C  MET*     2.9    23.3    +      -       +      +
     28C  THR      3.8     4.7    -      -       -      +
     30C  GLY*     1.3    70.2    -      -       -      +
     32C  THR*     1.3    60.7    +      -       -      +
     34C  TRP*     3.6    25.7    -      -       +      +
     35C  PHE*     2.9    43.0    +      -       +      -
     43C  LEU*     4.1    18.3    -      -       +      +
    302C  PEK      4.2    29.8    -      -       +      -
    307C  DMU      4.8    11.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 32 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    141A  ALA*     3.9    25.8    -      -       +      +
    144A  ASP*     4.9     2.0    -      -       +      -
    145A  LEU*     3.6    31.8    +      -       +      +
    148A  PHE*     3.3    21.4    -      -       -      -
     28C  THR      3.0    14.9    +      -       -      -
     29C  SER*     3.4     9.2    -      -       -      -
     30C  GLY      3.2     0.2    -      -       -      -
     31C  LEU*     1.3    73.1    -      -       -      +
     33C  MET*     1.3    68.1    +      -       -      +
     35C  PHE*     3.4     2.3    +      -       -      -
     36C  HIS*     3.1    33.8    +      -       +      +
     37C  PHE*     4.3     6.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 33 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29C  SER      2.9    14.9    +      -       -      +
     30C  GLY*     3.2    12.5    +      -       -      +
     32C  THR*     1.3    77.1    -      -       -      +
     34C  TRP*     1.3    63.8    +      -       -      +
     37C  PHE*     3.0    61.4    +      -       +      -
     39C  SER*     3.3    28.9    +      -       -      +
     42C  LEU*     4.7    12.6    -      -       +      +
     45J  TYR*     6.0     1.3    -      -       +      +
     49J  CYS*     3.7    48.9    -      -       +      +
     52J  TRP*     4.6    11.7    -      -       +      -
     53J  ALA*     5.9     0.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with TRP 34 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     30C  GLY      2.8    15.4    +      -       -      +
     31C  LEU*     3.6    19.5    -      -       +      +
     32C  THR      3.2     0.4    -      -       -      -
     33C  MET*     1.3    80.0    -      -       -      +
     35C  PHE*     1.3    90.1    +      +       -      +
     36C  HIS      3.4     0.2    +      -       -      -
     38C  ASN*     3.5    19.6    +      -       -      -
     39C  SER      3.3    11.9    +      -       -      +
     40C  MET*     3.5    40.5    -      -       +      +
     43C  LEU*     4.5     9.2    -      -       +      -
    302C  PEK      4.3    22.4    -      -       +      -
    307C  DMU      4.2    33.0    -      -       +      -
     61G  SER*     3.2    30.8    +      -       -      -
     62G  TRP*     3.8    37.2    -      +       +      +
     69G  PHE*     5.1     0.4    -      +       -      -
----------------------------------------------------------
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Residues in contact with PHE 35 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    144A  ASP*     5.2     0.9    -      -       -      -
    148A  PHE*     4.5     6.3    -      +       -      -
    210A  LEU*     4.3    22.9    -      -       +      -
    214A  ASN*     3.5    50.9    -      -       +      +
    215A  LEU*     4.5    15.7    -      -       +      -
     31C  LEU*     2.9    29.8    +      -       +      +
     32C  THR*     3.4     2.0    +      -       -      -
     34C  TRP*     1.3   105.4    -      +       -      +
     36C  HIS*     1.3    68.3    +      +       -      +
    302C  PEK      3.8    25.1    -      -       +      -
     58G  LYS*     2.9    23.3    +      -       -      -
     61G  SER*     3.1    20.3    +      -       -      -
     62G  TRP*     5.9     0.2    -      +       -      -
----------------------------------------------------------
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Residues in contact with HIS 36 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    140A  GLY*     3.5    32.0    +      -       -      -
    141A  ALA*     3.7    20.7    -      -       +      +
    144A  ASP*     2.7    36.0    +      -       +      -
    213A  ARG*     4.3     1.6    +      -       -      -
    214A  ASN*     3.9    13.6    +      -       -      -
     32C  THR*     3.1    19.4    +      -       +      +
     35C  PHE*     1.3    81.3    -      +       +      +
     37C  PHE*     1.3    82.8    +      -       +      +
     38C  ASN      3.4     5.0    +      -       -      -
     58G  LYS*     4.2    17.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 37 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    118A  VAL*     5.8     2.9    -      -       +      -
    119A  GLU*     5.2    11.9    -      -       +      -
    141A  ALA*     4.5    17.9    -      -       +      -
     32C  THR*     4.3     8.7    -      -       +      -
     33C  MET*     3.0    51.7    +      -       +      +
     36C  HIS*     1.3    95.0    -      -       +      +
     38C  ASN*     1.3    67.9    +      -       -      +
     39C  SER*     3.1     7.8    +      -       -      -
     52J  TRP*     3.9    27.1    -      +       +      -
     53J  ALA*     3.9    24.7    -      -       +      -
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


   I  Hydrophilic      - N and O that can donate and accept hydrogen bonds
                         (e.g., oxygen of hydroxyl group of Ser. or Thr)
  II  Acceptor         - N or O that can only accept a hydrogen bond
 III  Donor            - N that can only donate a hydrogen bond
  IV  Hydrophobic      - Cl, Br, I and all C atoms that are not in
                         aromatic rings and do not have a covalent bond to
                         a N or O atom
   V  Aromatic         - C in aromatic rings irrespective of any other 
                         bonds formed by the atom
  VI  Neutral          - C atoms that have a covalent bond to at least one
                         atom of class I or two or more atoms from class II
                         or III; atoms; S, F, P, and metal atoms in all cases
 VII  Neutral-donor    - C atoms that have a covalent bond with only one
                         atom of class III
VIII  Neutral-acceptor - C atoms that have a covalent bond with only 
                         one atom of class II
For each pair of contacts the state of legitimacy is shown below:

Legend:
+, legitimate
-, illegitimate
------------------------------------------------------------
  Atomic class           I  II  III   IV   V   VI  VII  VIII
------------------------------------------------------------
   I  (Hydrophilic)      +   +    +    -   +   +    +    +
  II  (Acceptor)         +   -    +    -   +   +    +    -
 III  (Donor)            +   +    -    -   +   +    -    +
  IV  (Hydrophobic)      -   -    -    +   +   +    +    +
   V  (Aromatic)         +   +    +    +   +   +    +    +
  VI  (Neutral)          +   +    +    +   +   +    +    +
 VII  (Neutral-donor)    +   +    -    +   +   +    -    +
VIII  (Neutral-acceptor) +   -    +    +   +   +    +    -
------------------------------------------------------------
Warning!
Atom classes for heterogroups are automatically assigned based on the atomic coordinates. However, in three cases (see below) the automatic assignment is currently ambiguous. In these cases, the user is advised to manually analyse the full list of contacts using LPC software.
1. Carbon atoms belonging to a 4-, 5- or 6-member ring are 
   considered "aromatic" (Class V) if the ring is approximately
   planar, and "hydrophobic" (Class IV) or "neutral" (Classes
   VI, VII, VIII) if the ring is non-planar.
2. The oxygen atom of a carbonyl or hydroxy group is considered
   "hydroxy" (Class I) if the CO bond is longer than 1.29 Å, and
   "carbonyl" (Class II) if shorter.
3. All nitrogen atoms are considered "hydrophilic" (Class I).

Please E-mail any questions and/or suggestions concerning this page to Vladimir.Sobolev@weizmann.ac.il