Contacts of the helix formed by residues 209 - 233 (chain D) in PDB entry 3OX4


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 THR 209 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    245C  TYR*     4.2    10.2    -      -       -      +
      4D  SER*     3.8    29.2    -      -       -      +
      5D  THR      6.1     0.4    -      -       -      +
      6D  PHE*     5.7     0.7    -      -       -      -
    207D  ALA      3.6    10.3    -      -       -      +
    208D  ALA*     1.3    79.9    -      -       -      +
    210D  PRO*     1.3    75.3    -      -       -      +
    211D  ILE*     3.1    18.7    +      -       -      +
    212D  THR*     2.8    23.1    +      -       +      +
    213D  ASP*     2.9    28.4    +      -       -      -
    256D  ASN*     5.7     2.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with PRO 210 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    218C  LYS*     3.3    27.8    -      -       -      +
    222C  MET*     3.5    41.3    -      -       +      -
    245C  TYR*     3.9    30.7    -      -       +      -
    249C  LEU*     4.5     1.8    -      -       +      -
    209D  THR*     1.3    89.7    -      -       -      +
    211D  ILE*     1.3    59.9    +      -       -      +
    213D  ASP*     3.8     5.7    +      -       +      +
    214D  ALA*     3.3    12.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 211 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     14C  MET*     3.6    31.2    -      -       +      -
    245C  TYR*     3.8    15.7    -      -       +      +
    248C  PHE*     3.8    22.7    -      -       +      -
    249C  LEU*     3.8    26.5    -      -       +      -
    252C  MET*     4.0    19.3    -      -       +      -
      6D  PHE*     3.6    35.4    -      -       +      -
    209D  THR*     3.1     5.5    -      -       -      +
    210D  PRO*     1.3    74.9    -      -       -      +
    212D  THR*     1.3    65.5    +      -       -      +
    213D  ASP      3.1     1.1    +      -       -      -
    214D  ALA*     3.2     3.3    +      -       -      +
    215D  CYS*     3.1    26.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with THR 212 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6D  PHE*     4.9     4.7    -      -       +      -
    202D  ALA*     4.6     2.4    +      -       -      -
    208D  ALA*     3.5     9.7    -      -       -      +
    209D  THR*     2.8    39.0    +      -       +      +
    211D  ILE*     1.3    77.1    -      -       -      +
    213D  ASP*     1.3    57.1    +      -       -      +
    215D  CYS*     3.4     1.7    +      -       -      -
    216D  ALA*     2.8    34.2    +      -       -      +
    252D  MET      4.1     2.7    -      -       -      +
    253D  ALA*     3.3    38.4    -      -       -      +
    256D  ASN*     3.8    21.8    -      -       +      -
    257D  ALA*     3.8    11.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 213 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    218C  LYS*     4.8     9.9    +      -       -      +
    203D  TYR*     3.4    25.1    +      -       +      +
    208D  ALA*     3.6    15.8    -      -       -      +
    209D  THR      2.9    23.3    +      -       -      +
    210D  PRO*     3.8     8.4    -      -       +      +
    212D  THR*     1.3    79.6    +      -       -      +
    214D  ALA*     1.3    63.2    +      -       -      +
    216D  ALA*     3.8     1.2    -      -       -      +
    217D  LEU*     3.0    28.5    +      -       +      +
    299D  ARG*     2.9    32.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 214 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    214C  ALA*     4.2    14.4    -      -       +      +
    215C  CYS*     5.4     0.2    -      -       -      -
    218C  LYS*     3.6    41.2    -      -       +      +
    249C  LEU*     4.9     4.9    -      -       +      -
    210D  PRO      3.3     6.1    +      -       -      +
    211D  ILE*     3.2     6.5    +      -       -      +
    213D  ASP*     1.3    78.0    -      -       -      +
    215D  CYS*     1.3    65.3    +      -       -      +
    217D  LEU*     3.9     6.0    -      -       -      +
    218D  LYS*     3.0    24.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with CYS 215 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    214C  ALA*     5.2     1.8    -      -       -      -
    215C  CYS*     5.0     9.6    -      -       -      -
    249C  LEU*     6.0     0.4    -      -       -      -
    211D  ILE*     3.1    29.6    +      -       -      +
    212D  THR      3.9     2.2    -      -       -      +
    214D  ALA*     1.3    76.9    -      -       -      +
    216D  ALA*     1.3    66.6    +      -       -      +
    218D  LYS*     3.2     2.0    +      -       -      +
    219D  ALA*     2.9    25.8    +      -       -      +
    249D  LEU*     3.6    36.9    -      -       +      +
    252D  MET*     3.8    39.0    -      -       +      -
    253D  ALA*     4.3     4.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 216 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    199D  ALA*     3.5    37.6    -      -       -      +
    203D  TYR*     4.1    19.1    -      -       +      +
    212D  THR      2.8    22.8    +      -       -      +
    213D  ASP      3.8     3.1    -      -       -      +
    215D  CYS*     1.3    72.8    -      -       -      +
    217D  LEU*     1.3    63.9    +      -       -      +
    219D  ALA*     3.4     2.2    +      -       -      -
    220D  ALA*     3.1    20.4    +      -       -      +
    249D  LEU      5.0     0.2    -      -       -      -
    253D  ALA*     3.9    15.6    -      -       +      +
    303D  VAL*     6.5     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 217 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    203D  TYR*     3.5    48.0    -      -       +      +
    213D  ASP*     3.0    15.9    +      -       +      +
    214D  ALA*     3.9     5.8    -      -       -      +
    216D  ALA*     1.3    77.1    -      -       -      +
    218D  LYS*     1.3    62.8    +      -       -      +
    220D  ALA*     3.5     2.0    +      -       -      +
    221D  SER*     3.1    23.2    +      -       -      -
    302D  ASP*     4.2     8.7    -      -       +      +
    303D  VAL*     4.0    30.5    -      -       +      -
    306D  ALA*     3.6    19.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 218 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    210C  PRO*     3.5    24.4    +      -       -      +
    213C  ASP*     4.6    13.5    +      -       -      +
    214C  ALA*     3.7    23.5    -      -       +      +
    217C  LEU*     6.2     1.4    -      -       -      +
    214D  ALA      3.0    19.0    +      -       -      +
    215D  CYS      3.7     3.1    -      -       -      +
    217D  LEU*     1.3    74.2    -      -       -      +
    219D  ALA*     1.3    66.1    +      -       -      +
    221D  SER*     3.3    11.0    +      -       -      -
    222D  MET*     3.0    43.1    +      -       +      +
    249D  LEU*     3.5    22.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 219 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    199D  ALA*     4.2     5.4    -      -       +      -
    215D  CYS      2.9    16.8    +      -       -      +
    216D  ALA      3.6     4.7    -      -       -      +
    218D  LYS*     1.3    77.8    -      -       -      +
    220D  ALA*     1.3    57.4    +      -       -      +
    222D  MET*     3.1     3.5    +      -       -      +
    223D  ILE*     2.8    38.0    +      -       +      +
    246D  ALA*     3.4    30.7    -      -       -      +
    249D  LEU*     3.9     4.6    -      -       +      +
    250D  ALA*     3.6    21.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 220 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    196D  LEU*     4.3    18.2    -      -       +      +
    199D  ALA*     4.2     5.7    -      -       +      +
    216D  ALA      3.1    13.5    +      -       -      +
    217D  LEU*     3.7     7.4    -      -       -      +
    218D  LYS      3.3     0.2    -      -       -      -
    219D  ALA*     1.3    78.1    -      -       -      +
    221D  SER*     1.3    57.5    +      -       -      +
    223D  ILE*     3.3     2.1    +      -       -      +
    224D  ALA*     2.9    31.9    +      -       -      +
    303D  VAL*     3.8    31.0    -      -       +      +
    306D  ALA*     4.7     0.2    -      -       +      -
    307D  MET*     3.9    12.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 221 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    217D  LEU      3.1    11.1    +      -       -      -
    218D  LYS*     3.5    16.5    +      -       -      +
    219D  ALA      3.2     0.2    -      -       -      -
    220D  ALA*     1.3    78.7    -      -       -      +
    222D  MET*     1.3    63.6    +      -       -      +
    224D  ALA*     3.6     2.1    +      -       -      +
    225D  LYS*     3.3    44.5    +      -       -      +
    306D  ALA*     3.1    29.6    +      -       -      +
    307D  MET*     4.4     1.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with MET 222 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    210C  PRO*     3.5    35.0    -      -       +      -
    218D  LYS*     3.0    28.5    +      -       +      +
    219D  ALA      3.7     3.6    -      -       -      +
    221D  SER*     1.3    76.3    -      -       -      +
    223D  ILE*     1.3    64.9    +      -       -      +
    225D  LYS*     3.3     4.6    +      -       +      -
    226D  ASN*     3.0    36.3    +      -       -      +
    242D  ALA*     3.6    31.6    -      -       +      +
    243D  MET*     5.1     0.4    -      -       -      -
    245D  TYR*     3.8     6.1    -      -       +      -
    246D  ALA*     3.7    15.7    -      -       +      -
    249D  LEU*     3.7    30.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 223 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    192D  GLY      4.2     5.2    -      -       -      +
    195D  ALA*     3.7    16.6    -      -       +      +
    196D  LEU*     3.4    52.5    -      -       +      +
    199D  ALA*     5.3     0.4    -      -       +      -
    219D  ALA*     2.8    29.2    +      -       +      +
    220D  ALA*     3.8     3.8    -      -       -      +
    222D  MET*     1.3    75.4    -      -       -      +
    224D  ALA*     1.3    66.0    +      -       -      +
    226D  ASN      3.1     0.2    +      -       -      -
    227D  LEU*     2.9    51.5    +      -       +      +
    243D  MET*     4.0    16.2    -      -       +      -
    246D  ALA*     3.9    16.4    -      -       +      +
    330D  LEU*     4.8     2.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 224 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    220D  ALA      2.9    17.7    +      -       -      +
    221D  SER      3.8     4.0    -      -       -      +
    222D  MET      3.3     0.2    -      -       -      -
    223D  ILE*     1.3    78.3    -      -       -      +
    225D  LYS*     1.3    62.0    +      -       +      +
    226D  ASN      3.6     0.3    +      -       -      -
    227D  LEU      4.9     0.3    +      -       -      -
    228D  LYS*     5.5     5.2    +      -       -      +
    307D  MET*     3.4    51.5    -      -       +      +
    330D  LEU*     5.1    10.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 225 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    221D  SER*     3.3    32.9    +      -       -      +
    222D  MET*     3.3     3.6    +      -       -      +
    223D  ILE      3.1     0.4    -      -       -      -
    224D  ALA*     1.3    79.5    -      -       +      +
    226D  ASN*     1.3    74.3    +      -       -      +
    228D  LYS*     6.5     0.4    -      -       -      -
    229D  THR*     4.3     8.5    +      -       -      -
    306D  ALA      5.5     1.6    -      -       -      -
    307D  MET      5.6     3.4    -      -       -      +
    308D  GLY*     6.2     3.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 226 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    222D  MET*     3.0    30.0    +      -       -      +
    223D  ILE      3.1     0.4    +      -       -      -
    225D  LYS*     1.3    92.0    -      -       -      +
    227D  LEU*     1.3    69.0    +      -       -      +
    228D  LYS      3.3     2.2    -      -       -      -
    229D  THR*     3.1    10.2    +      -       -      +
    230D  ALA*     2.9    22.2    +      -       -      +
    238D  PRO*     4.2     2.3    -      -       -      +
    239D  ALA*     3.6    30.6    +      -       -      +
    242D  ALA*     3.3    27.2    -      -       +      +
    243D  MET*     4.3     6.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 227 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    188D  THR*     3.7    28.7    -      -       +      +
    189D  ALA      4.3     0.7    -      -       -      +
    192D  GLY*     3.9    30.3    -      -       -      -
    193D  MET*     4.0    11.4    -      -       -      +
    223D  ILE*     2.9    33.7    +      -       +      +
    226D  ASN*     1.3    71.1    -      -       -      +
    228D  LYS*     1.3    64.0    +      -       -      +
    230D  ALA*     3.1     3.5    +      -       -      +
    231D  CYS*     2.9    29.2    +      -       -      -
    243D  MET*     3.8    14.4    -      -       +      -
    330D  LEU*     4.5    11.4    -      -       +      -
    334D  ILE*     3.7    29.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 228 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    185D  LYS*     5.1     0.6    -      -       -      +
    223D  ILE      4.9     0.2    +      -       -      -
    224D  ALA      5.5     1.4    +      -       -      -
    225D  LYS      6.5     0.4    -      -       -      -
    226D  ASN      3.3     1.0    -      -       -      +
    227D  LEU*     1.3    77.6    -      -       -      +
    229D  THR*     1.3    64.0    +      -       -      +
    231D  CYS*     3.1     3.3    +      -       -      +
    232D  ASP*     3.0    55.9    +      -       -      +
    330D  LEU*     4.6    13.7    -      -       +      +
    333D  SER*     2.7    47.6    +      -       -      +
    334D  ILE*     4.0    14.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 229 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    225D  LYS      4.3     9.6    +      -       -      -
    226D  ASN*     3.1    12.8    +      -       -      +
    228D  LYS*     1.3    80.5    -      -       -      +
    230D  ALA*     1.3    57.3    +      -       -      +
    232D  ASP*     3.3     5.0    +      -       -      +
    233D  ASN*     2.9    32.3    +      -       +      +
    236D  ASP*     3.7    20.2    -      -       +      +
    239D  ALA*     3.7    19.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 230 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    188D  THR*     3.9    20.3    +      -       +      +
    226D  ASN      2.9    11.7    +      -       -      +
    227D  LEU*     3.6     8.5    -      -       -      +
    229D  THR*     1.3    77.5    -      -       -      +
    231D  CYS*     1.3    61.4    +      -       -      +
    233D  ASN      4.1     4.7    -      -       -      -
    234D  GLY*     3.3    25.1    +      -       -      -
    236D  ASP*     5.3     0.2    -      -       -      -
    239D  ALA*     3.8    15.2    -      -       +      +
    240D  ARG*     4.2    17.1    +      -       -      +
    243D  MET*     4.4    15.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with CYS 231 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    185D  LYS*     3.9    36.8    +      -       +      +
    188D  THR*     3.6    23.1    -      -       -      -
    189D  ALA*     3.7    24.7    -      -       -      -
    227D  LEU*     2.9    20.3    +      -       -      -
    228D  LYS      3.1     7.6    +      -       -      +
    230D  ALA*     1.3    80.3    -      -       -      +
    232D  ASP*     1.3    63.4    +      -       -      +
    233D  ASN*     3.5     0.3    +      -       -      -
    234D  GLY      4.6     1.9    +      -       -      -
    334D  ILE*     3.5    29.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 232 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    185D  LYS*     3.9    12.3    +      -       -      +
    228D  LYS*     3.0    55.6    +      -       -      +
    229D  THR*     4.1     4.6    -      -       -      +
    231D  CYS*     1.3    77.0    -      -       -      +
    233D  ASN*     1.3    62.3    +      -       +      +
    234D  GLY      4.1     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 233 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    229D  THR*     2.9    15.4    +      -       +      +
    230D  ALA*     3.5     5.3    -      -       -      +
    232D  ASP*     1.3    81.7    -      -       +      +
    234D  GLY*     1.3    57.1    +      -       -      +
    235D  LYS*     2.8    29.2    +      -       -      +
    236D  ASP*     2.9    39.9    +      -       +      +
----------------------------------------------------------
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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