Contacts of the helix formed by residues 178 - 204 (chain D) in PDB entry 1FP1


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 ASP 178 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    141D  TYR*     2.7    28.4    +      -       -      -
    174D  PHE*     4.1    17.4    -      -       +      +
    175D  MET*     2.9    14.1    -      -       -      +
    176D  GLY      2.7     6.1    +      -       -      -
    177D  LYS*     1.3    95.4    -      -       -      +
    179D  LYS*     1.3    60.1    +      -       -      +
    180D  LYS*     3.0     8.8    -      -       -      +
    181D  MET*     2.7    37.9    +      -       +      +
    182D  ASN*     3.6     6.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 179 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    175D  MET*     3.9    34.1    -      -       -      -
    176D  GLY*     3.8    18.1    +      -       -      +
    178D  ASP*     1.3    72.9    -      -       -      +
    180D  LYS*     1.3    58.2    +      -       -      +
    182D  ASN*     3.9     7.4    -      -       +      +
    183D  GLN*     3.1    27.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 180 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    141D  TYR*     3.2    30.0    +      -       +      +
    142D  PRO*     5.7     5.3    -      -       -      +
    178D  ASP*     3.0    11.8    -      -       -      +
    179D  LYS*     1.3    77.1    -      -       -      +
    181D  MET*     1.3    63.0    +      -       -      +
    183D  GLN*     3.0     9.3    +      -       -      +
    184D  ILE*     2.9    36.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with MET 181 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    138D  PHE*     4.1    19.2    -      -       +      -
    141D  TYR*     3.3    43.2    +      -       +      -
    143D  ALA*     4.4     4.5    -      -       -      -
    144D  LEU*     3.8    27.1    -      -       +      -
    174D  PHE*     3.9    32.3    -      -       +      +
    178D  ASP*     2.7    20.5    +      -       +      +
    180D  LYS*     1.3    72.8    -      -       -      +
    182D  ASN*     1.3    58.7    +      -       -      +
    184D  ILE*     3.2     4.0    +      -       -      +
    185D  PHE*     2.8    31.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 182 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    175D  MET*     3.0    49.2    -      -       +      +
    178D  ASP      3.6     8.0    +      -       -      +
    179D  LYS*     3.9     9.2    -      -       -      +
    180D  LYS      3.2     0.2    -      -       -      -
    181D  MET*     1.3    79.2    -      -       -      +
    183D  GLN*     1.3    55.8    +      -       -      +
    185D  PHE*     3.4     8.9    +      -       -      +
    186D  ASN*     2.6    65.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 183 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    179D  LYS      3.1    17.0    +      -       -      +
    180D  LYS*     3.0     8.0    +      -       -      +
    182D  ASN*     1.3    81.0    +      -       -      +
    184D  ILE*     1.3    69.7    +      -       -      +
    186D  ASN*     4.0     5.4    -      -       -      +
    187D  LYS*     3.0    68.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 184 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    134D  SER*     4.6     2.4    -      -       -      +
    137D  THR*     4.1    22.4    -      -       +      -
    138D  PHE*     3.6    35.7    -      -       +      +
    141D  TYR*     3.6    35.4    -      -       +      -
    180D  LYS*     2.9    27.3    +      -       +      +
    181D  MET*     3.7     7.2    -      -       -      +
    183D  GLN*     1.3    84.8    -      -       -      +
    185D  PHE*     1.3    66.1    +      -       -      +
    187D  LYS*     3.5     4.6    +      -       -      +
    188D  SER*     3.1    22.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 185 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    135D  PHE*     5.1     0.2    -      +       -      -
    138D  PHE*     3.6    39.5    -      +       +      -
    181D  MET*     2.8    23.9    +      -       +      +
    182D  ASN*     3.7     9.4    -      -       -      +
    184D  ILE*     1.3    73.0    -      -       -      +
    186D  ASN*     1.3    77.8    +      -       -      +
    188D  SER*     2.7    20.8    +      -       -      -
    189D  MET*     3.1    54.9    +      -       +      +
   2000D  HCC      3.7    32.5    -      +       -      -
----------------------------------------------------------
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Residues in contact with ASN 186 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    182D  ASN*     2.6    57.8    +      -       -      +
    183D  GLN*     4.0     5.3    -      -       -      +
    185D  PHE*     1.3    87.1    -      -       -      +
    187D  LYS*     1.3    63.8    +      -       -      +
    189D  MET*     3.2     7.5    +      -       -      +
    190D  VAL*     3.1    29.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 187 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    134D  SER*     4.7     7.2    -      -       -      -
    183D  GLN*     3.0    47.0    +      -       -      +
    184D  ILE*     3.8     5.8    -      -       -      +
    186D  ASN*     1.3    75.8    -      -       -      +
    188D  SER*     1.3    63.7    +      -       -      +
    190D  VAL*     3.2    10.3    +      -       +      +
    191D  ASP*     3.1    41.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 188 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    134D  SER*     3.4    35.6    +      -       -      -
    135D  PHE*     3.4    31.1    -      -       -      -
    138D  PHE*     4.0     4.2    -      -       -      +
    184D  ILE      3.1    11.8    +      -       -      -
    185D  PHE*     2.7    22.2    +      -       -      -
    187D  LYS*     1.3    76.0    -      -       -      +
    189D  MET*     1.3    58.5    +      -       -      +
    191D  ASP*     3.9     0.3    -      -       -      +
    192D  VAL*     3.0    36.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 189 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    135D  PHE*     4.9     5.4    -      -       -      -
    185D  PHE*     3.1    51.9    +      -       +      +
    186D  ASN*     3.2     9.4    +      -       -      +
    188D  SER*     1.3    78.0    +      -       -      +
    190D  VAL*     1.3    62.3    +      -       +      +
    192D  VAL*     4.1     4.4    -      -       -      +
    193D  CYS*     2.9    35.1    +      -       -      +
    275D  ALA*     6.6     0.4    -      -       +      -
   1699D  SAH      5.2    18.8    -      -       +      +
   2000D  HCC      3.4    39.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 190 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    186D  ASN*     3.1    18.0    +      -       +      +
    187D  LYS*     3.2    11.2    +      -       +      +
    189D  MET*     1.3    79.0    -      -       +      +
    191D  ASP*     1.3    65.8    +      -       -      +
    193D  CYS*     3.7     4.1    -      -       -      +
    194D  ALA*     3.0    30.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 191 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    131D  TYR*     3.3    36.7    +      -       +      +
    134D  SER*     2.6    33.4    +      -       -      +
    187D  LYS*     3.1    22.6    +      -       -      +
    188D  SER      3.9     0.7    -      -       -      +
    190D  VAL*     1.3    82.8    -      -       -      +
    192D  VAL*     1.3    64.4    +      -       +      +
    194D  ALA*     3.3     6.1    +      -       -      +
    195D  THR*     2.9    27.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 192 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    131D  TYR      4.9     1.6    -      -       -      +
    132D  LEU*     4.3    17.9    -      -       +      +
    135D  PHE*     4.1    15.9    -      -       +      +
    188D  SER      3.0    21.5    +      -       -      +
    189D  MET*     4.1     4.9    -      -       -      +
    191D  ASP*     1.3    75.3    -      -       +      +
    193D  CYS*     1.3    58.7    +      -       -      +
    195D  THR*     3.1     7.7    +      -       -      -
    196D  GLU*     2.9    45.2    +      -       +      +
   2000D  HCC      3.7    59.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with CYS 193 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    189D  MET      2.9    20.7    +      -       -      +
    190D  VAL*     3.7     4.9    -      -       -      +
    192D  VAL*     1.3    77.9    -      -       -      +
    194D  ALA*     1.3    56.7    +      -       -      +
    196D  GLU*     3.2    10.4    +      -       -      +
    197D  MET*     2.8    35.1    +      -       -      +
    223D  ASN*     3.1    42.2    -      -       -      -
    274D  LYS*     3.6    19.1    -      -       -      +
   1699D  SAH      3.8    10.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 194 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    130D  GLY*     5.4     3.8    -      -       -      -
    190D  VAL*     3.0    21.8    +      -       +      +
    191D  ASP*     3.7     6.3    -      -       -      +
    192D  VAL      3.3     0.2    -      -       -      -
    193D  CYS*     1.3    75.3    -      -       -      +
    195D  THR*     1.3    62.2    +      -       -      +
    197D  MET*     4.0     5.7    -      -       -      +
    198D  LYS*     3.0    26.0    +      -       -      +
    223D  ASN*     5.8     0.2    -      -       -      -
    226D  LEU*     5.1     8.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with THR 195 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    122D  TYR*     4.4    11.9    -      -       +      -
    129D  ARG      3.8    20.7    -      -       -      +
    130D  GLY*     3.2    18.7    -      -       -      -
    131D  TYR      3.3     9.5    +      -       -      -
    132D  LEU*     3.9    25.4    -      -       +      +
    191D  ASP      2.9    18.0    +      -       -      -
    192D  VAL      3.1     8.9    +      -       -      -
    194D  ALA*     1.3    79.3    -      -       -      +
    196D  GLU*     1.3    62.9    +      -       +      +
    198D  LYS*     3.6     2.6    +      -       -      +
    199D  ARG*     3.6    13.7    +      -       -      +
    362D  PHE*     3.7    19.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 196 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132D  LEU*     6.4     0.2    -      -       +      -
    192D  VAL*     2.9    33.2    +      -       +      +
    193D  CYS*     3.7    12.3    +      -       -      +
    195D  THR*     1.3    78.9    -      -       -      +
    197D  MET*     1.3    57.8    +      -       -      +
    199D  ARG*     3.5     2.1    +      -       -      +
    200D  MET*     3.0    30.9    +      -       -      +
    274D  LYS*     2.8    36.3    +      -       -      -
    307D  PHE*     3.4    30.3    -      -       +      -
    361D  ALA*     5.2     0.2    -      -       -      +
    362D  PHE*     3.9    16.6    -      -       +      -
    365D  LEU*     3.7    25.7    -      -       +      +
   2000D  HCC      4.1     4.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with MET 197 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    193D  CYS*     2.8    21.7    +      -       -      +
    194D  ALA      4.1     1.6    -      -       -      +
    196D  GLU*     1.3    77.1    -      -       -      +
    198D  LYS*     1.3    64.4    +      -       -      +
    200D  MET*     4.1    21.1    -      -       +      -
    201D  LEU*     3.0    35.3    +      -       +      +
    223D  ASN*     3.3    39.9    -      -       +      +
    226D  LEU*     3.7    21.8    -      -       +      -
    227D  ILE*     3.4    34.5    -      -       +      -
    272D  ILE*     5.6     2.9    -      -       +      -
    274D  LYS*     3.9    26.9    -      -       -      -
    305D  VAL*     6.0     0.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 198 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128D  SER*     3.4    31.9    +      -       -      +
    129D  ARG*     3.2    49.4    -      -       -      +
    194D  ALA      3.0    18.3    +      -       -      +
    195D  THR      3.9     4.9    -      -       -      +
    196D  GLU      3.3     0.4    -      -       -      -
    197D  MET*     1.3    79.1    -      -       -      +
    199D  ARG*     1.3    60.2    +      -       -      +
    201D  LEU*     3.5     5.8    +      -       -      +
    202D  GLU*     3.0    31.1    +      -       +      +
    226D  LEU*     5.5     1.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 199 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    129D  ARG*     4.2    13.5    -      -       -      +
    195D  THR      3.6     3.4    +      -       -      +
    196D  GLU      3.5     1.2    +      -       -      +
    197D  MET      3.3     0.2    -      -       -      -
    198D  LYS*     1.3    76.5    -      -       -      +
    200D  MET*     1.3    66.9    +      -       -      +
    202D  GLU*     2.8    58.3    +      -       -      +
    203D  ILE*     3.3    34.0    +      -       +      +
    361D  ALA*     3.4    29.4    -      -       +      +
    362D  PHE*     3.5    36.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with MET 200 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    196D  GLU      3.0    19.5    +      -       -      +
    197D  MET*     3.8    29.6    -      -       +      +
    199D  ARG*     1.3    77.6    -      -       -      +
    201D  LEU*     1.3    61.2    +      -       -      +
    203D  ILE*     3.3     9.2    +      -       -      +
    204D  TYR*     2.9    43.8    +      -       +      +
    207D  PHE*     3.8    37.2    -      -       +      -
    272D  ILE*     4.2     4.5    -      -       +      -
    303D  ILE*     5.8     0.2    -      -       +      -
    305D  VAL*     4.0    29.6    -      -       +      -
    361D  ALA*     4.7     5.6    -      -       +      +
    365D  LEU*     5.3     4.5    -      -       +      -
    367D  VAL*     3.7    25.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 201 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    197D  MET*     3.0    25.3    +      -       +      +
    198D  LYS*     3.9     5.2    -      -       -      +
    200D  MET*     1.3    78.5    -      -       -      +
    202D  GLU*     1.3    55.0    +      -       +      +
    203D  ILE      3.3     0.2    -      -       -      -
    204D  TYR      4.1     9.5    -      -       -      +
    207D  PHE*     3.7    19.3    -      -       +      -
    226D  LEU*     3.9    39.3    -      -       +      +
    227D  ILE*     3.3    31.9    -      -       +      -
    230D  LYS*     2.6    41.9    +      -       +      +
    231D  TYR*     4.3    12.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 202 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    129D  ARG*     2.4    37.6    +      -       -      -
    198D  LYS*     3.0    25.5    +      -       +      +
    199D  ARG*     2.8    48.4    +      -       -      +
    201D  LEU*     1.3    78.9    -      -       +      +
    203D  ILE*     1.3    60.0    +      -       -      +
    204D  TYR      5.3     0.2    -      -       -      -
    205D  THR*     6.0     0.9    -      -       -      +
    230D  LYS*     4.4     6.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 203 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    199D  ARG*     3.5    43.5    -      -       +      +
    200D  MET*     3.5    11.4    -      -       -      +
    202D  GLU*     1.3    80.7    -      -       -      +
    204D  TYR*     1.3    65.5    +      -       -      +
    205D  THR*     3.6    11.2    +      -       -      +
    359D  CYS*     3.9    26.7    -      -       +      +
    360D  ARG      3.3    34.3    -      -       -      +
    361D  ALA*     3.9    15.7    -      -       +      +
    367D  VAL*     5.6     1.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 204 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    200D  MET*     2.9    26.4    +      -       +      +
    201D  LEU*     4.1     9.2    -      -       -      +
    202D  GLU      5.3     0.2    -      -       -      -
    203D  ILE*     1.3    76.7    -      -       -      +
    205D  THR*     1.3    62.5    +      -       -      +
    206D  GLY*     3.3    32.7    +      -       -      -
    207D  PHE*     3.5    38.5    -      +       +      -
    230D  LYS*     5.2     0.3    +      -       -      -
    231D  TYR*     3.7    13.3    +      -       -      -
    301D  LYS*     3.6     2.1    +      -       -      -
    303D  ILE*     3.2    30.2    -      -       +      +
    358D  ALA*     3.7    18.4    -      -       +      -
    359D  CYS*     3.8    13.2    -      -       -      -
    367D  VAL*     3.6    31.4    -      -       +      -
    369D  GLU*     2.6    32.2    +      -       -      +
----------------------------------------------------------
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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