Contacts of the helix formed by residues 154 - 175 (chain C) in PDB entry 4J1R


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 154 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    146C  TYR*     3.5    29.2    -      -       +      +
    152C  THR*     3.5     3.3    -      -       +      +
    153C  LEU*     1.4    90.2    -      -       +      +
    155C  VAL*     1.3    66.7    +      -       +      +
    156C  ILE*     3.0    18.2    -      -       +      -
    157C  TYR*     2.9    29.2    +      -       +      +
    158C  VAL*     3.4     7.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 155 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    152C  THR*     6.3     2.5    -      -       +      -
    153C  LEU      3.4     3.9    +      -       -      +
    154C  PRO*     1.3    71.2    -      -       +      +
    156C  ILE*     1.3    63.0    +      -       -      +
    158C  VAL*     3.2    11.5    +      -       +      +
    159C  LYS*     2.9    46.0    +      -       -      +
    251C  LEU*     5.7     5.6    -      -       +      -
    310C  PRO*     4.1    30.5    -      -       +      -
    312C  GLU*     5.7     0.2    -      -       -      +
    339C  PHE*     4.1    16.6    -      -       +      -
    342C  GLU*     5.7     0.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 156 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    154C  PRO*     2.9    17.9    +      -       +      -
    155C  VAL*     1.3    78.4    -      -       -      +
    157C  TYR*     1.3    66.2    +      -       +      +
    159C  LYS*     3.4     5.8    +      -       +      +
    160C  LEU*     3.2    30.6    +      -       +      +
    342C  GLU*     3.5    33.8    +      -       +      +
    343C  LEU*     4.1    20.6    -      -       +      -
    348C  VAL*     4.6     9.6    -      -       +      -
    349C  LYS      4.9     7.0    -      -       -      +
    350C  LEU*     6.2     0.4    -      -       +      -
    351C  PRO*     4.0    31.2    -      -       +      -
    356C  THR*     6.4     0.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 157 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    146C  TYR*     4.6     7.2    -      -       -      -
    153C  LEU*     3.8    21.8    -      -       +      -
    154C  PRO*     2.9    37.4    +      -       +      +
    156C  ILE*     1.3    79.5    -      -       +      +
    158C  VAL*     1.3    60.6    +      -       -      +
    160C  LEU*     3.3    18.5    +      -       +      +
    161C  TYR*     3.0    61.0    +      +       +      -
    194C  ALA*     5.2     6.7    -      -       +      -
    350C  LEU*     5.7     0.2    -      -       +      -
    351C  PRO*     3.3    45.7    -      -       +      +
    352C  ASN*     4.9     6.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 158 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    153C  LEU*     3.7    33.2    -      -       +      +
    154C  PRO      3.7     9.4    -      -       -      +
    155C  VAL*     3.5    12.6    -      -       +      +
    157C  TYR*     1.3    77.2    -      -       -      +
    159C  LYS*     1.3    63.2    +      -       -      +
    161C  TYR*     4.0     0.6    -      -       -      +
    162C  MET*     3.0    33.4    +      -       +      +
    247C  LEU*     3.7    31.0    -      -       +      -
    250C  LEU*     4.1    28.9    -      -       +      +
    251C  LEU*     4.5    10.3    -      -       +      -
    339C  PHE*     4.0     8.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 159 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    155C  VAL*     2.9    38.5    +      -       -      +
    156C  ILE*     3.7     5.6    -      -       +      +
    157C  TYR      3.4     0.2    -      -       -      -
    158C  VAL*     1.3    75.4    -      -       -      +
    160C  LEU*     1.3    63.6    +      -       -      +
    163C  TYR*     3.1    23.6    +      -       -      +
    312C  GLU*     4.8     9.2    +      -       -      -
    338C  SER      5.7     0.2    +      -       -      -
    339C  PHE*     3.3    44.6    +      -       +      +
    340C  PHE*     3.1    18.1    -      -       +      -
    342C  GLU*     2.5    50.1    +      -       +      +
    343C  LEU*     3.8    19.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 160 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    156C  ILE*     3.2    22.7    +      -       +      +
    157C  TYR*     3.5    22.2    -      -       +      +
    158C  VAL      3.2     0.2    -      -       -      -
    159C  LYS*     1.3    80.4    -      -       -      +
    161C  TYR*     1.3    68.4    +      -       +      +
    163C  TYR*     3.8     1.8    -      -       -      +
    164C  GLN*     3.2    35.5    +      -       -      +
    194C  ALA*     4.0    15.5    -      -       +      -
    343C  LEU*     4.0    23.1    -      -       +      -
    350C  LEU*     3.7    27.8    -      -       +      -
    356C  THR*     4.8     4.0    -      -       +      -
    357C  PRO*     4.6    17.5    -      -       +      -
    359C  LEU*     4.4    19.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 161 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    139C  VAL*     4.5    15.9    -      -       +      -
    142C  VAL*     4.9    10.6    -      -       +      +
    153C  LEU*     4.3    15.0    -      -       +      -
    157C  TYR*     3.0    47.8    +      +       +      +
    158C  VAL*     4.1     3.1    -      -       -      +
    160C  LEU*     1.3    86.8    -      -       +      +
    162C  MET*     1.3    65.4    +      -       +      +
    164C  GLN*     3.4     8.4    +      -       -      +
    165C  LEU*     3.0    21.8    +      -       -      +
    187C  LEU*     6.2     0.9    -      -       +      -
    189C  LEU*     3.6    43.7    -      -       +      +
    191C  PRO*     5.8     3.5    -      -       -      +
    194C  ALA*     4.2    25.9    -      -       +      +
    196C  LEU*     3.6    19.1    -      -       +      +
    250C  LEU*     5.1     8.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 162 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    158C  VAL*     3.0    25.3    +      -       +      +
    161C  TYR*     1.3    77.3    -      -       -      +
    163C  TYR*     1.3    64.8    +      -       -      +
    165C  LEU*     3.0    20.1    +      -       +      +
    166C  PHE*     2.9    55.5    +      -       +      -
    187C  LEU*     6.0     0.7    -      -       -      -
    243C  ALA      3.3    23.8    -      -       -      +
    246C  VAL*     4.0    14.6    -      -       -      -
    247C  LEU*     3.8    43.1    -      -       +      -
    250C  LEU*     4.3     7.0    -      -       +      -
    339C  PHE*     4.9     0.7    -      -       +      -
    340C  PHE*     3.8    17.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 163 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    159C  LYS      3.1    20.4    +      -       -      +
    160C  LEU      3.8     2.9    -      -       -      +
    162C  MET*     1.3    77.8    -      -       -      +
    164C  GLN*     1.3    64.3    +      -       -      +
    166C  PHE*     3.2     5.6    +      -       -      +
    167C  ARG*     3.0    36.4    +      -       -      +
    335C  CYS*     3.6    41.5    -      -       +      -
    340C  PHE*     3.5    24.4    -      +       +      -
    343C  LEU*     3.9    12.8    -      -       +      -
    344C  ARG*     4.2     9.3    +      -       +      -
    359C  LEU*     2.9    55.6    +      -       +      -
    360C  PHE*     4.4     9.3    -      +       -      -
    362C  PHE*     3.1    22.8    -      +       -      -
    377C  LEU*     4.4     4.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 164 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108C  ASN*     3.0    38.0    +      -       -      +
    160C  LEU*     3.2    26.7    +      -       -      +
    161C  TYR*     3.9     2.6    -      -       -      +
    163C  TYR*     1.3    77.6    -      -       +      +
    165C  LEU*     1.3    62.8    +      -       -      +
    167C  ARG*     3.4     5.6    +      -       -      +
    168C  SER*     3.1    21.0    +      -       -      -
    194C  ALA      2.9    24.2    +      -       -      -
    195C  VAL*     3.4    10.9    -      -       -      +
    196C  LEU*     2.9    41.4    +      -       +      +
    357C  PRO*     4.4     6.0    -      -       -      +
    359C  LEU*     4.2    23.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 165 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    161C  TYR      3.0    13.3    +      -       -      +
    162C  MET*     3.0    36.0    +      -       +      +
    164C  GLN*     1.3    76.1    -      -       -      +
    166C  PHE*     1.3    65.9    +      -       +      +
    168C  SER*     2.9    26.4    +      -       -      +
    169C  LEU*     3.0    29.6    +      -       +      +
    182C  ILE*     4.5    14.6    -      -       +      -
    187C  LEU*     3.9    37.5    -      -       +      -
    196C  LEU*     3.9     8.0    -      -       +      +
    198C  LEU*     4.7     2.5    -      -       +      -
    243C  ALA*     3.9    20.0    -      -       +      -
    246C  VAL*     4.8     2.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 166 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    162C  MET*     2.9    54.3    +      -       +      -
    163C  TYR*     3.2     2.2    +      -       -      +
    165C  LEU*     1.3    74.9    -      -       +      +
    167C  ARG*     1.3    52.6    +      -       -      +
    169C  LEU*     4.1     9.4    -      -       +      -
    170C  ALA*     2.7    35.9    +      -       -      +
    240C  VAL*     5.1     6.1    -      -       +      -
    243C  ALA*     3.8    21.8    -      -       +      -
    316C  LEU*     4.7     4.5    -      -       +      -
    320C  LEU*     3.7    29.2    -      -       +      -
    331C  PRO*     3.4    17.7    -      -       +      +
    334C  ALA*     3.7    27.6    -      -       +      -
    335C  CYS*     3.4    20.9    -      -       -      -
    340C  PHE*     3.9    24.0    -      +       -      -
----------------------------------------------------------
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Residues in contact with ARG 167 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    106C  HIS*     3.8    10.4    +      -       +      -
    107C  CYS*     4.1     6.0    -      -       -      -
    108C  ASN*     3.6    17.8    +      -       -      +
    163C  TYR*     3.0    41.4    +      -       +      +
    164C  GLN*     3.5     9.9    -      -       -      +
    165C  LEU      3.2     0.2    -      -       -      -
    166C  PHE*     1.3    73.7    -      -       -      +
    168C  SER*     1.3    65.8    +      -       -      +
    170C  ALA*     3.3     7.7    +      -       -      +
    171C  TYR*     3.0    21.8    +      -       -      +
    332C  LEU*     6.3     0.2    -      -       -      -
    335C  CYS*     4.1     9.6    -      -       -      -
    358C  ALA      3.4     7.7    +      -       -      -
    359C  LEU*     3.1    24.7    +      -       -      +
    360C  PHE      3.8     0.4    -      -       -      +
    361C  ASN*     3.0    41.4    +      -       -      -
    362C  PHE*     3.9    18.0    -      -       +      -
    366C  GLU*     3.1    38.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 168 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    106C  HIS*     4.0    10.1    -      -       -      -
    108C  ASN*     3.4    27.1    +      -       -      -
    109C  ILE*     3.6    13.2    -      -       -      -
    164C  GLN      3.1     9.3    +      -       -      -
    165C  LEU*     2.9    21.8    +      -       -      +
    167C  ARG*     1.3    79.4    -      -       -      +
    169C  LEU*     1.3    56.7    +      -       -      +
    171C  TYR*     3.3     4.8    -      -       -      +
    172C  ILE*     2.9    34.3    +      -       -      +
    196C  LEU*     5.1     0.3    -      -       -      +
    198C  LEU*     3.7    21.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 169 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    165C  LEU*     3.0    26.6    +      -       +      +
    166C  PHE*     3.5    13.5    -      -       +      +
    168C  SER*     1.3    73.7    +      -       -      +
    170C  ALA*     1.3    60.5    +      -       -      +
    171C  TYR      3.1     1.6    -      -       -      -
    172C  ILE*     3.8    12.1    -      -       +      -
    173C  HIS*     2.9    52.7    +      -       +      +
    182C  ILE*     3.8    17.7    -      -       +      -
    198C  LEU*     3.8    25.1    -      -       +      -
    239C  ASP*     4.2    25.1    -      -       +      +
    240C  VAL*     4.7     2.9    -      -       +      +
    243C  ALA*     4.3    15.7    -      -       +      -
    331C  PRO*     4.0    12.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 170 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    166C  PHE      2.7    21.2    +      -       -      +
    167C  ARG*     3.5     7.9    -      -       -      +
    169C  LEU*     1.3    71.8    -      -       -      +
    171C  TYR*     1.3    62.9    +      -       -      +
    173C  HIS*     4.1     2.7    -      -       -      +
    174C  SER*     3.3    22.2    +      -       -      -
    331C  PRO*     3.4    18.3    -      -       +      +
    332C  LEU*     4.0    31.0    -      -       +      +
    366C  GLU*     4.6    14.1    -      -       +      +
    369C  SER*     5.7     5.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 171 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    103C  LYS      3.9     2.9    +      -       -      -
    104C  LEU*     3.5    27.0    -      -       +      -
    105C  ASP*     2.9    38.8    +      -       -      +
    106C  HIS*     3.7    29.8    -      +       +      +
    109C  ILE*     3.5    19.3    -      -       +      -
    167C  ARG      3.0    12.8    +      -       -      +
    168C  SER*     3.3    10.1    -      -       -      +
    170C  ALA*     1.3    77.3    -      -       -      +
    172C  ILE*     1.3    60.8    +      -       -      +
    174C  SER*     2.5    26.9    +      -       -      -
    175C  PHE*     3.2    33.2    -      +       -      -
    363C  THR*     5.1     4.0    -      -       +      -
    365C  GLN*     4.2    15.0    -      -       +      -
    366C  GLU*     3.9    19.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 172 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    104C  LEU*     3.9    22.2    -      -       +      -
    109C  ILE*     3.7    23.1    -      -       +      -
    168C  SER      2.9    20.6    +      -       -      +
    169C  LEU*     3.5    29.4    -      -       +      +
    171C  TYR*     1.3    76.5    -      -       -      +
    173C  HIS*     1.3    70.4    +      -       -      +
    174C  SER      3.2     0.2    -      -       -      -
    175C  PHE*     3.4    13.0    +      -       -      +
    177C  ILE*     3.0    45.3    +      -       +      +
    179C  HIS*     4.1    23.6    -      -       +      +
    198C  LEU*     4.1     8.7    -      -       +      -
    201C  PHE*     4.2     9.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with HIS 173 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    169C  LEU*     2.9    34.5    +      -       +      +
    170C  ALA*     4.1     4.5    -      -       -      +
    172C  ILE*     1.3    82.1    -      -       +      +
    174C  SER*     1.3    64.1    +      -       -      +
    176C  GLY*     3.0    13.7    +      -       -      -
    177C  ILE      3.0    17.9    +      -       -      +
    236C  SER*     3.2    45.1    +      -       -      +
    239C  ASP*     3.1    33.2    -      -       +      +
    240C  VAL*     4.7     2.9    -      -       +      +
    331C  PRO*     3.5    27.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 174 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    170C  ALA      3.3    11.3    +      -       -      -
    171C  TYR*     2.5    22.7    +      -       -      -
    173C  HIS*     1.3    78.4    -      -       -      +
    175C  PHE*     1.3    59.5    +      -       -      +
    176C  GLY      3.2     0.7    +      -       -      -
    365C  GLN*     3.0    47.5    +      -       -      +
    366C  GLU*     5.4     0.9    -      -       -      -
    368C  SER*     4.4    12.9    +      -       -      -
    369C  SER*     5.7     3.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 175 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    103C  LYS*     4.7    29.8    -      -       +      +
    104C  LEU*     4.1     8.5    -      -       +      -
    171C  TYR*     3.2    66.4    -      +       -      -
    172C  ILE*     3.4     8.7    +      -       -      +
    173C  HIS      3.2     0.6    -      -       -      -
    174C  SER*     1.3    79.8    +      -       -      +
    176C  GLY*     1.3    56.0    +      -       -      +
    177C  ILE*     3.7    21.8    -      -       +      -
    206C  GLN*     3.0    29.1    +      -       -      +
    365C  GLN*     3.8    23.6    -      -       +      -
----------------------------------------------------------
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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