Contacts of the helix formed by residues 125 - 147 (chain D) in PDB entry 3FZ7


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 GLY 125 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    123D  THR*     2.5    24.4    +      -       -      -
    124D  ILE*     1.3    80.7    -      -       -      +
    126D  SER*     1.3    65.4    +      -       -      -
    127D  SER*     3.2     3.1    +      -       -      -
    128D  GLU*     3.5     3.9    +      -       -      +
    129D  ALA*     3.2     9.4    +      -       -      +
    275D  HIS*     3.7     9.4    -      -       -      -
    285D  GLY*     3.8    12.6    -      -       -      -
    467D  PO4      3.4    14.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with SER 126 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    125D  GLY*     1.3    68.6    -      -       -      -
    127D  SER*     1.3    63.9    +      -       -      +
    129D  ALA*     4.1     7.6    -      -       -      -
    130D  CYS*     2.8    38.9    +      -       -      -
    163D  GLN*     6.0     0.2    -      -       -      -
    165D  CYS*     4.8     2.0    -      -       -      -
    243D  ASP*     4.8     1.0    +      -       -      -
    245D  ALA*     3.6    17.4    -      -       -      +
    271D  SER*     4.9     0.9    -      -       -      -
    272D  ALA*     3.4    17.8    +      -       -      -
    273D  SER*     2.7    22.6    +      -       -      -
    285D  GLY*     4.4     0.8    -      -       -      -
    467D  PO4      2.6    24.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 127 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    125D  GLY*     3.2     1.3    -      -       -      -
    126D  SER*     1.3    80.3    -      -       -      +
    128D  GLU*     1.3    64.1    +      -       -      +
    130D  CYS*     3.4     3.1    -      -       -      +
    131D  MET*     3.0    33.9    +      -       -      +
    165D  CYS*     3.9    21.1    -      -       -      +
    168D  LYS*     4.2     6.2    +      -       -      -
    467D  PO4      3.4    19.5    +      -       -      -
    315E  ILE      2.7    25.0    +      -       -      -
    316E  ASN*     3.9     4.4    +      -       -      -
    317E  PHE*     3.8    16.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 128 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    122D  ASN      5.5     0.4    -      -       -      -
    123D  THR*     3.2    20.6    -      -       +      -
    124D  ILE      3.0    20.9    +      -       -      +
    125D  GLY      3.5     4.4    +      -       -      +
    126D  SER      3.3     0.2    -      -       -      -
    127D  SER*     1.3    76.2    -      -       -      +
    129D  ALA*     1.3    67.2    +      -       -      +
    131D  MET*     3.1    12.1    +      -       -      +
    132D  LEU*     2.9    29.8    +      -       +      +
    314D  ALA*     3.7     6.8    -      -       -      +
    315D  ILE*     2.7    40.0    +      -       +      +
    316D  ASN*     2.8    33.3    +      -       -      +
    319D  ARG*     4.8     2.6    +      -       -      -
    315E  ILE*     4.5     4.5    +      -       +      -
    316E  ASN*     4.0    14.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 129 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    123D  THR*     3.6    17.7    -      -       +      +
    125D  GLY      3.2    15.7    +      -       -      +
    126D  SER*     3.7     6.5    -      -       -      +
    128D  GLU*     1.3    77.8    -      -       -      +
    130D  CYS*     1.3    56.3    +      -       -      +
    132D  LEU*     3.2     5.2    +      -       -      +
    133D  GLY*     2.9    24.8    +      -       -      -
    271D  SER*     3.7    25.0    -      -       -      -
    286D  TRP      3.8     8.1    -      -       -      +
    287D  VAL*     3.8    21.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with CYS 130 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    126D  SER*     2.8    32.1    +      -       -      +
    127D  SER      3.4     2.0    -      -       -      +
    129D  ALA*     1.3    70.5    -      -       -      +
    131D  MET*     1.3    57.7    +      -       -      +
    133D  GLY*     3.1     1.8    +      -       -      +
    134D  GLY*     2.8    33.4    +      -       -      -
    165D  CYS*     3.2    33.9    -      -       +      +
    166D  TRP*     3.5    39.5    -      -       +      -
    169D  PHE*     4.8     0.4    -      -       -      -
    241D  HIS*     4.8     1.1    -      -       -      -
    243D  ASP*     3.7    10.1    -      -       -      -
    271D  SER*     3.8    15.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with MET 131 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    127D  SER*     3.0    23.0    +      -       -      +
    128D  GLU*     3.1     9.6    +      -       -      +
    130D  CYS*     1.3    75.3    -      -       -      +
    132D  LEU*     1.3    58.3    +      -       -      +
    135D  MET*     2.9    35.6    +      -       -      +
    165D  CYS      4.1    14.8    -      -       -      +
    168D  LYS*     4.2    22.2    -      -       +      -
    169D  PHE*     4.0    15.1    -      -       -      -
    172D  TYR*     4.5     3.8    -      -       +      -
    173D  TRP*     3.8    26.9    -      -       +      -
    315D  ILE*     3.6    25.8    -      -       +      -
    315E  ILE*     3.5    35.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 132 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121D  THR*     3.8    10.3    -      -       +      -
    123D  THR*     3.8    28.5    -      -       +      -
    128D  GLU*     2.9    19.5    +      -       +      +
    129D  ALA      3.5     5.4    -      -       -      +
    131D  MET*     1.3    77.2    -      -       -      +
    133D  GLY*     1.3    64.2    +      -       -      +
    135D  MET*     3.4    10.7    +      -       +      +
    136D  ALA*     3.0    20.1    +      -       -      +
    287D  VAL*     4.0     3.1    -      -       +      -
    289D  TRP*     4.0     8.1    -      -       +      -
    313D  PHE*     3.4    74.0    -      -       +      +
    314D  ALA*     4.3     2.0    -      -       -      +
    315D  ILE*     4.2    16.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 133 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    129D  ALA      2.9    14.1    +      -       -      -
    130D  CYS      3.1     3.8    +      -       -      -
    132D  LEU*     1.3    77.3    -      -       -      +
    134D  GLY*     1.3    56.1    +      -       -      +
    136D  ALA*     3.3     3.6    +      -       -      +
    137D  MET*     2.9    34.8    +      -       -      +
    140D  ARG*     5.1     0.3    +      -       -      -
    241D  HIS*     3.9    22.0    -      -       -      -
    269D  SER*     4.4     6.2    +      -       -      -
    287D  VAL*     4.6     0.2    -      -       -      -
    289D  TRP*     4.2    12.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 134 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    130D  CYS      2.8    16.6    +      -       -      -
    133D  GLY*     1.3    73.2    -      -       -      +
    135D  MET*     1.3    59.7    +      -       -      +
    137D  MET*     3.2    20.4    +      -       -      +
    138D  LYS*     2.9    25.5    +      -       -      +
    166D  TRP*     4.2     2.5    -      -       -      -
    169D  PHE*     3.2    31.6    -      -       -      -
    203D  ILE*     4.2     0.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with MET 135 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    131D  MET      2.9    22.7    +      -       -      +
    132D  LEU*     3.7    15.5    -      -       +      +
    134D  GLY*     1.3    75.7    -      -       -      +
    136D  ALA*     1.3    63.3    +      -       -      +
    138D  LYS*     3.0     4.7    +      -       -      +
    139D  TRP*     2.9    36.3    +      -       +      -
    169D  PHE*     3.5     2.8    -      -       -      -
    173D  TRP*     3.4    44.2    -      -       +      +
    299D  LEU*     4.1     7.4    -      -       +      -
    313D  PHE*     4.0    21.1    -      -       +      -
    315D  ILE*     4.1     7.6    -      -       +      -
    172E  TYR*     3.5    52.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 136 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132D  LEU      3.0    12.7    +      -       -      +
    133D  GLY      3.7     4.7    -      -       -      +
    135D  MET*     1.3    76.2    -      -       -      +
    137D  MET*     1.3    59.0    +      -       -      +
    139D  TRP*     3.2     1.9    +      -       -      +
    140D  ARG*     2.8    41.2    +      -       -      +
    289D  TRP*     3.5    30.5    -      -       +      +
    295D  LEU*     4.2     7.0    -      -       +      -
    296D  PRO*     3.9    18.3    -      -       +      +
    299D  LEU*     3.9    11.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with MET 137 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133D  GLY      2.9    10.3    +      -       -      +
    134D  GLY*     3.4    24.7    -      -       -      +
    135D  MET      3.2     0.2    -      -       -      -
    136D  ALA*     1.3    75.0    -      -       -      +
    138D  LYS*     1.3    56.7    +      -       -      +
    140D  ARG*     3.0    30.1    +      -       -      +
    141D  TRP*     2.9    31.0    +      -       -      +
    157D  LEU*     3.9    15.3    -      -       +      -
    166D  TRP*     4.2     4.3    -      -       +      -
    203D  ILE*     4.0    16.6    -      -       +      +
    204D  GLY*     3.8    28.3    -      -       -      -
    206D  VAL*     3.7    17.0    -      -       +      -
    239D  ASP*     5.1     0.7    -      -       +      +
    240D  MET      4.8     1.1    -      -       -      -
    241D  HIS*     3.4    37.9    -      -       +      -
    269D  SER*     5.5     0.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 138 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    134D  GLY      2.9    17.0    +      -       -      +
    135D  MET*     3.5     5.4    -      -       -      +
    137D  MET*     1.3    75.7    -      -       -      +
    139D  TRP*     1.3    70.1    +      -       +      +
    141D  TRP*     3.4     2.9    +      -       +      +
    142D  ARG*     2.9    66.6    +      -       +      +
    152D  THR      6.0     0.7    -      -       -      -
    155D  PRO*     4.4    12.6    -      -       -      -
    169D  PHE*     4.9     0.9    -      -       +      -
    173D  TRP*     2.7    41.8    +      -       +      +
    174D  ASP*     4.5     4.2    +      -       -      +
    175D  VAL*     4.0    18.4    -      -       +      -
    203D  ILE*     4.1    24.5    -      -       +      -
    174E  ASP*     4.4     6.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with TRP 139 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    135D  MET*     2.9    48.3    +      -       +      +
    138D  LYS*     1.3    89.1    -      -       +      +
    140D  ARG*     1.3    67.1    +      -       -      +
    142D  ARG*     3.3    39.7    +      -       +      +
    143D  LYS*     3.0    30.3    +      -       +      +
    173D  TRP*     4.8     2.2    -      +       -      -
    296D  PRO*     3.6    19.7    -      -       +      -
    298D  GLU*     4.0    27.9    -      -       +      +
    299D  LEU*     3.6    32.5    -      -       +      +
    171E  ARG*     3.4    31.8    -      -       +      +
    172E  TYR      3.8    15.9    -      -       -      -
    174E  ASP*     3.6     8.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 140 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    136D  ALA*     2.8    33.4    +      -       -      +
    137D  MET*     3.3    34.9    +      -       -      +
    139D  TRP*     1.3    72.7    -      -       -      +
    141D  TRP*     1.3    63.9    +      -       -      +
    143D  LYS*     3.3     7.9    +      -       +      +
    144D  ARG*     3.1    22.5    +      -       -      +
    203D  ILE      5.3     0.8    +      -       -      -
    239D  ASP*     4.2    18.2    +      -       -      +
    240D  MET      4.9     2.0    +      -       -      -
    268D  LYS*     3.6    38.3    -      -       -      +
    269D  SER*     4.7     4.8    +      -       -      -
    289D  TRP*     4.2     6.5    -      -       -      +
    293D  GLU      4.2     5.8    -      -       -      +
    294D  ALA*     2.9    36.4    +      -       -      +
    296D  PRO*     4.1    15.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with TRP 141 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    137D  MET      2.9    16.0    +      -       -      +
    138D  LYS*     3.7     5.2    -      -       +      +
    140D  ARG*     1.3    76.8    -      -       -      +
    142D  ARG*     1.3    93.0    +      -       +      +
    144D  ARG*     3.0    28.9    +      -       -      +
    145D  MET*     3.0    40.5    +      -       +      +
    152D  THR*     3.4    39.3    -      -       -      -
    154D  LYS      4.6     0.4    -      -       -      -
    155D  PRO*     3.5    25.4    -      -       +      -
    200D  GLU      3.0    19.3    +      -       -      -
    201D  ASN*     3.6    35.2    -      -       -      -
    202D  THR      3.5    17.7    -      -       -      -
    203D  ILE*     3.7    28.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 142 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    138D  LYS*     2.9    49.3    +      -       +      +
    139D  TRP*     3.3    41.3    +      -       +      +
    141D  TRP*     1.3    97.0    -      -       +      +
    143D  LYS*     1.3    62.3    +      -       +      +
    145D  MET*     3.2     1.9    +      -       -      +
    146D  GLU*     3.0    42.5    +      -       -      +
    152D  THR*     4.0    26.4    -      -       +      +
    174E  ASP*     2.9    41.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 143 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    139D  TRP*     3.0    24.1    +      -       +      +
    140D  ARG*     3.7     7.2    -      -       +      +
    142D  ARG*     1.3    76.2    -      -       +      +
    144D  ARG*     1.3    58.7    +      -       -      +
    146D  GLU*     3.5    15.4    +      -       -      +
    147D  ALA*     3.1    30.1    +      -       -      +
    296D  PRO*     4.1    17.5    -      -       +      +
    297D  GLN      4.9     0.4    -      -       -      +
    298D  GLU*     3.1    40.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 144 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    140D  ARG      3.1    11.9    +      -       -      +
    141D  TRP*     3.0    29.9    +      -       -      +
    143D  LYS*     1.3    74.5    -      -       -      +
    145D  MET*     1.3    84.9    +      -       -      +
    147D  ALA*     4.0     5.4    +      -       -      +
    148D  ALA*     3.5    22.3    +      -       -      +
    200D  GLU*     3.9    12.3    +      -       -      +
    202D  THR      4.4     7.3    +      -       -      -
    203D  ILE      5.9     0.8    +      -       -      -
    236D  ILE*     4.6    14.3    -      -       -      +
    237D  ASP*     2.9    40.1    +      -       -      +
    238D  ILE*     4.7     2.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with MET 145 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    141D  TRP*     3.0    32.9    +      -       +      +
    142D  ARG      3.8     1.3    -      -       -      +
    144D  ARG*     1.3   100.1    -      -       -      +
    146D  GLU*     1.3    66.0    +      -       -      +
    148D  ALA*     3.0     6.8    +      -       -      +
    149D  GLY      3.0     5.0    +      -       -      -
    150D  LYS*     2.9    53.7    +      -       +      +
    151D  PRO*     3.8    17.0    -      -       +      +
    152D  THR*     3.7    19.5    -      -       +      -
    200D  GLU*     3.2    31.4    -      -       +      +
    201D  ASN*     4.0    11.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 146 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    142D  ARG*     3.0    39.6    +      -       -      +
    143D  LYS*     3.8    16.4    -      -       -      +
    145D  MET*     1.3    73.5    -      -       -      +
    147D  ALA*     1.3    58.5    +      -       -      +
    149D  GLY*     2.9    21.9    +      -       -      +
    150D  LYS      4.5     4.5    +      -       -      +
    152D  THR*     4.5    13.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 147 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    143D  LYS      3.1    18.1    +      -       -      +
    144D  ARG*     4.1     5.8    -      -       -      +
    145D  MET      3.4     0.2    -      -       -      -
    146D  GLU*     1.3    74.0    -      -       -      +
    148D  ALA*     1.3    56.6    +      -       -      +
    149D  GLY      3.5     0.2    -      -       -      -
----------------------------------------------------------
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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