Contacts of the helix formed by residues 209 - 233 (chain A) 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 A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      2A  ALA*     5.9     3.4    -      -       +      -
      4A  SER*     3.7    32.3    -      -       -      +
      6A  PHE*     5.6     0.7    -      -       -      -
    207A  ALA      3.8     9.0    -      -       -      +
    208A  ALA*     1.3    80.1    -      -       -      +
    210A  PRO*     1.3    77.5    -      -       -      +
    211A  ILE*     3.2    10.4    +      -       -      +
    212A  THR*     2.9    32.4    +      -       +      +
    213A  ASP*     2.9    27.9    +      -       -      -
    256A  ASN      5.8     1.6    -      -       -      +
    245B  TYR*     3.9     9.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with PRO 210 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    209A  THR*     1.3    89.3    -      -       -      +
    211A  ILE*     1.3    59.6    +      -       -      +
    213A  ASP*     3.7     6.9    -      -       +      +
    214A  ALA*     3.2    19.1    +      -       -      +
    218B  LYS*     3.4    20.8    -      -       -      +
    222B  MET*     3.7    39.7    -      -       +      -
    245B  TYR*     4.0    31.6    -      -       +      -
    249B  LEU*     4.5     2.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 211 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6A  PHE*     3.6    33.2    -      -       +      -
    209A  THR*     3.1     5.9    +      -       -      +
    210A  PRO*     1.3    74.9    -      -       -      +
    212A  THR*     1.3    65.0    +      -       -      +
    214A  ALA*     3.1     4.3    +      -       -      +
    215A  CYS*     3.1    25.6    +      -       -      -
     14B  MET*     3.4    42.2    -      -       +      -
    245B  TYR*     3.9    15.5    -      -       +      -
    248B  PHE*     3.7    17.3    -      -       +      -
    249B  LEU*     3.9    23.3    -      -       +      -
    252B  MET*     3.9    20.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 212 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6A  PHE*     4.8     5.4    -      -       +      -
    202A  ALA      4.5     2.6    +      -       -      -
    208A  ALA*     3.5    10.4    -      -       -      +
    209A  THR*     2.9    39.2    +      -       +      +
    211A  ILE*     1.3    75.7    -      -       -      +
    213A  ASP*     1.3    57.9    +      -       -      +
    215A  CYS*     3.3     1.9    +      -       -      +
    216A  ALA*     2.8    33.1    +      -       -      +
    252A  MET      4.4     2.5    -      -       -      +
    253A  ALA*     3.5    36.4    -      -       -      +
    256A  ASN*     3.8    22.7    -      -       +      -
    257A  ALA*     3.7    11.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 213 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    203A  TYR*     3.4    23.2    +      -       +      +
    208A  ALA*     3.6    12.5    -      -       -      +
    209A  THR      2.9    23.5    +      -       -      +
    210A  PRO*     3.7     8.9    -      -       +      +
    212A  THR*     1.3    78.1    +      -       -      +
    214A  ALA*     1.3    62.2    +      -       -      +
    216A  ALA*     3.4     1.2    +      -       -      +
    217A  LEU*     3.0    32.0    +      -       +      +
    299A  ARG*     2.7    37.8    +      -       -      -
    218B  LYS*     4.5    11.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 214 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    210A  PRO      3.2    11.5    +      -       -      +
    211A  ILE      3.1     9.5    +      -       -      +
    213A  ASP*     1.3    79.5    -      -       -      +
    215A  CYS*     1.3    64.2    +      -       -      +
    217A  LEU*     3.7     4.3    +      -       -      +
    218A  LYS*     3.2    24.3    +      -       -      +
    214B  ALA*     4.2    14.3    -      -       +      +
    215B  CYS*     5.3     0.7    -      -       -      -
    218B  LYS*     3.7    32.1    -      -       +      -
    249B  LEU*     4.5     8.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with CYS 215 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    211A  ILE*     3.1    29.2    +      -       -      +
    212A  THR*     3.8     4.5    -      -       -      +
    214A  ALA*     1.3    79.6    -      -       -      +
    216A  ALA*     1.3    60.2    +      -       -      +
    218A  LYS*     3.5     0.5    +      -       -      +
    219A  ALA*     3.0    29.6    +      -       -      +
    249A  LEU*     3.5    37.6    -      -       +      +
    252A  MET*     3.9    37.7    -      -       +      -
    253A  ALA*     4.3     3.6    -      -       +      +
    214B  ALA*     5.5     1.3    -      -       -      -
    215B  CYS*     5.0     7.6    -      -       -      -
    249B  LEU*     6.0     0.2    -      -       -      -
    252B  MET*     4.9     2.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 216 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    199A  ALA*     3.5    33.0    -      -       -      +
    203A  TYR*     4.0    18.2    -      -       +      +
    212A  THR      2.8    19.4    +      -       -      +
    213A  ASP      3.7     2.9    -      -       -      +
    215A  CYS*     1.3    77.7    -      -       -      +
    217A  LEU*     1.3    58.1    +      -       -      +
    219A  ALA*     3.2     8.0    +      -       -      +
    220A  ALA*     3.0    25.2    +      -       -      +
    250A  ALA*     5.4     0.4    -      -       -      +
    253A  ALA*     3.9    15.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 217 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    203A  TYR*     3.5    40.6    -      -       +      +
    213A  ASP*     3.0    15.1    +      -       +      +
    214A  ALA*     4.2     3.8    -      -       -      +
    216A  ALA*     1.3    73.3    -      -       -      +
    218A  LYS*     1.3    66.4    +      -       -      +
    220A  ALA*     3.4     2.2    +      -       -      +
    221A  SER*     3.0    24.0    +      -       -      -
    302A  ASP*     4.0     9.9    -      -       +      +
    303A  VAL*     3.7    39.9    -      -       +      +
    306A  ALA*     3.6    17.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 218 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    214A  ALA      3.2    16.6    +      -       -      +
    215A  CYS*     3.9     4.3    -      -       -      +
    216A  ALA      3.3     0.2    -      -       -      -
    217A  LEU*     1.3    78.2    -      -       -      +
    219A  ALA*     1.3    63.4    +      -       -      +
    221A  SER*     3.3    11.7    +      -       -      -
    222A  MET*     3.0    46.7    +      -       +      +
    249A  LEU*     3.5    21.1    -      -       +      -
    210B  PRO*     3.5    24.3    -      -       -      +
    213B  ASP*     4.7    12.3    +      -       -      +
    214B  ALA*     3.7    23.8    -      -       +      +
    217B  LEU*     6.2     2.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 219 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    199A  ALA*     4.3     4.9    -      -       +      -
    215A  CYS      3.0    19.4    +      -       -      +
    216A  ALA      3.5     5.2    -      -       -      +
    218A  LYS*     1.3    74.3    -      -       -      +
    220A  ALA*     1.3    66.4    +      -       -      +
    222A  MET*     3.2     2.1    +      -       -      +
    223A  ILE*     2.9    32.4    +      -       +      +
    246A  ALA*     3.5    29.6    -      -       -      +
    249A  LEU*     3.8     4.7    -      -       +      +
    250A  ALA*     3.7    21.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 220 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    196A  LEU*     4.0    21.1    -      -       +      +
    199A  ALA*     4.2     7.3    -      -       +      +
    216A  ALA      3.0    16.4    +      -       -      +
    217A  LEU*     3.9     5.8    -      -       -      +
    219A  ALA*     1.3    74.8    -      -       -      +
    221A  SER*     1.3    57.3    +      -       -      +
    223A  ILE*     3.8     0.9    -      -       -      +
    224A  ALA*     2.8    33.1    +      -       -      +
    303A  VAL*     3.8    30.1    -      -       +      +
    306A  ALA*     5.0     0.4    -      -       +      -
    307A  MET*     3.8    11.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 221 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    217A  LEU      3.0    16.8    +      -       -      -
    218A  LYS*     3.4    15.6    +      -       -      +
    220A  ALA*     1.3    78.1    -      -       -      +
    222A  MET*     1.3    65.4    +      -       -      +
    224A  ALA*     3.2     1.2    +      -       -      +
    225A  LYS*     3.0    48.2    +      -       -      +
    306A  ALA*     3.2    25.2    +      -       -      -
    307A  MET*     4.3     1.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with MET 222 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    218A  LYS*     3.0    27.3    +      -       +      +
    221A  SER*     1.3    77.0    -      -       -      +
    223A  ILE*     1.3    58.2    +      -       -      +
    225A  LYS*     3.1     3.6    +      -       -      -
    226A  ASN*     2.9    45.0    +      -       -      +
    242A  ALA*     3.4    33.0    -      -       +      +
    243A  MET*     5.1     0.2    -      -       -      -
    245A  TYR*     3.7    13.9    -      -       +      -
    246A  ALA*     3.8    16.4    -      -       +      -
    249A  LEU*     3.7    29.6    -      -       -      -
    210B  PRO*     3.7    26.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 223 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    192A  GLY      4.1     5.4    -      -       -      +
    195A  ALA*     3.6    17.7    -      -       +      +
    196A  LEU*     3.5    49.1    -      -       +      +
    219A  ALA*     2.9    30.9    +      -       +      +
    220A  ALA*     3.8     3.4    -      -       -      +
    222A  MET*     1.3    76.5    -      -       -      +
    224A  ALA*     1.3    60.4    +      -       -      +
    227A  LEU*     3.0    52.7    +      -       +      +
    243A  MET*     4.0    16.6    -      -       +      -
    246A  ALA*     3.8    17.5    -      -       +      +
    330A  LEU*     4.8     4.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 224 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    196A  LEU*     6.1     0.2    -      -       -      -
    220A  ALA      2.8    19.1    +      -       -      +
    221A  SER      3.4     5.4    -      -       -      +
    222A  MET      3.2     0.2    -      -       -      -
    223A  ILE*     1.3    78.7    -      -       -      +
    225A  LYS*     1.3    61.3    +      -       +      +
    227A  LEU      5.2     0.3    +      -       -      -
    228A  LYS*     5.8     2.3    +      -       -      +
    307A  MET*     3.5    50.4    -      -       +      +
    330A  LEU*     5.4    10.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 225 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    221A  SER*     3.0    36.3    +      -       -      +
    222A  MET*     3.1     3.6    +      -       -      -
    224A  ALA*     1.3    82.3    -      -       +      +
    226A  ASN*     1.3    73.4    +      -       -      +
    228A  LYS*     5.7     0.7    -      -       -      -
    229A  THR*     4.5     6.8    +      -       -      -
    306A  ALA      3.3    16.0    +      -       -      -
    307A  MET      4.0    12.0    +      -       -      +
    308A  GLY*     4.0     7.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 226 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    222A  MET*     2.9    32.1    +      -       -      +
    223A  ILE      3.3     0.4    +      -       -      -
    224A  ALA      3.5     0.2    -      -       -      -
    225A  LYS*     1.3    94.6    -      -       -      +
    227A  LEU*     1.3    63.7    +      -       -      +
    228A  LYS      3.4     2.9    -      -       -      -
    229A  THR*     3.3    10.8    +      -       -      -
    230A  ALA*     3.2    22.3    +      -       -      +
    238A  PRO      4.4     1.2    -      -       -      +
    239A  ALA*     3.8    20.8    +      -       -      +
    242A  ALA*     3.4    32.8    -      -       +      +
    243A  MET*     4.2     7.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 227 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    188A  THR*     3.6    28.9    -      -       +      +
    189A  ALA*     4.5     0.4    -      -       -      -
    192A  GLY*     3.8    32.1    -      -       -      -
    193A  MET*     4.0    10.8    -      -       -      +
    223A  ILE*     3.0    31.9    +      -       +      +
    226A  ASN*     1.3    73.9    -      -       -      +
    228A  LYS*     1.3    66.0    +      -       -      +
    230A  ALA*     3.4     1.8    +      -       -      +
    231A  CYS*     3.1    35.2    +      -       -      -
    243A  MET*     3.9    15.5    -      -       +      -
    330A  LEU*     4.3     9.9    -      -       +      -
    334A  ILE*     3.8    27.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 228 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    223A  ILE      4.9     0.2    +      -       -      -
    224A  ALA      5.8     2.4    +      -       -      +
    225A  LYS      6.5     0.4    -      -       -      -
    226A  ASN      3.4     0.8    -      -       -      +
    227A  LEU*     1.3    76.9    -      -       -      +
    229A  THR*     1.3    59.9    +      -       -      +
    231A  CYS*     3.2     2.6    +      -       -      +
    232A  ASP*     2.9    62.6    +      -       -      +
    330A  LEU*     4.8    11.2    -      -       +      +
    333A  SER*     2.7    49.1    +      -       -      +
    334A  ILE*     4.0    13.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 229 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    225A  LYS      4.5     9.7    +      -       -      -
    226A  ASN*     3.3    11.3    +      -       -      -
    227A  LEU      3.3     0.4    -      -       -      -
    228A  LYS*     1.3    80.6    -      -       -      +
    230A  ALA*     1.3    58.6    +      -       -      +
    232A  ASP*     3.2     5.2    +      -       -      +
    233A  ASN*     2.8    32.3    +      -       +      +
    236A  ASP*     3.7    32.8    -      -       +      +
    239A  ALA*     3.7     7.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 230 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    185A  LYS*     5.7     0.5    -      -       -      -
    188A  THR*     3.9    24.2    -      -       +      +
    226A  ASN      3.2    12.8    +      -       -      +
    227A  LEU*     3.9     3.4    -      -       -      +
    228A  LYS      3.4     0.2    -      -       -      -
    229A  THR*     1.3    78.5    -      -       -      +
    231A  CYS*     1.3    59.6    +      -       -      +
    233A  ASN      4.0     7.0    -      -       -      -
    234A  GLY*     3.3    23.2    +      -       -      -
    239A  ALA*     3.9    10.9    -      -       +      +
    240A  ARG*     4.1    22.0    +      -       -      +
    243A  MET*     4.4    13.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with CYS 231 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    185A  LYS*     3.2    44.1    +      -       -      +
    188A  THR*     3.8     9.9    -      -       -      -
    189A  ALA*     3.7    42.0    -      -       -      -
    227A  LEU*     3.1    24.3    +      -       -      +
    228A  LYS      3.5     7.9    -      -       -      +
    229A  THR      3.1     0.4    -      -       -      -
    230A  ALA*     1.3    79.1    -      -       -      +
    232A  ASP*     1.3    62.4    +      -       -      +
    233A  ASN      3.6     0.5    +      -       -      -
    234A  GLY      4.8     1.0    +      -       -      -
    334A  ILE*     3.8    16.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 232 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    185A  LYS*     4.2    10.7    +      -       -      -
    228A  LYS*     2.9    56.8    +      -       -      +
    229A  THR*     4.1     3.7    -      -       -      +
    231A  CYS*     1.3    79.6    -      -       -      +
    233A  ASN*     1.3    62.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 233 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    229A  THR*     2.8    14.6    +      -       +      +
    230A  ALA*     3.6     5.5    -      -       -      +
    231A  CYS      3.3     0.6    -      -       -      -
    232A  ASP*     1.3    83.6    -      -       +      +
    234A  GLY*     1.3    59.0    +      -       -      +
    235A  LYS*     2.8    32.7    +      -       -      +
    236A  ASP*     2.8    42.3    +      -       +      +
----------------------------------------------------------
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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