Contacts of the helix formed by residues 180 - 216 (chain L) in PDB entry 6AH0


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 SER 180 (chain L).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    178L  GLN      4.2     0.6    +      -       -      -
    179L  LEU*     1.3    74.0    -      -       -      +
    181L  GLU*     1.3    67.9    +      -       -      +
    182L  GLU      2.9     4.3    +      -       -      +
    183L  GLU*     3.2     6.3    +      -       -      +
    184L  LEU*     2.8    21.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 181 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    179L  LEU      3.8     1.8    +      -       -      -
    180L  SER*     1.3    70.4    -      -       -      +
    182L  GLU*     1.3    55.3    +      -       -      +
    184L  LEU*     3.7     1.0    +      -       -      +
    185L  GLU*     3.0    24.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 182 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    180L  SER*     3.0     1.8    -      -       -      +
    181L  GLU*     1.3    75.5    -      -       -      +
    183L  GLU*     1.3    64.6    +      -       -      +
    185L  GLU*     3.3     1.4    +      -       -      +
    186L  ARG*     3.0    21.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 183 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    179L  LEU*     5.9     0.9    -      -       -      +
    180L  SER*     3.2     9.8    +      -       -      +
    182L  GLU*     1.3    73.1    -      -       -      +
    184L  LEU*     1.3    64.7    +      -       -      +
    186L  ARG*     3.4     1.2    +      -       -      +
    187L  LEU*     3.0    20.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 184 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    179L  LEU*     5.0     4.5    -      -       -      +
    180L  SER      2.8    21.3    +      -       -      +
    181L  GLU*     4.0     1.1    -      -       -      +
    183L  GLU*     1.3    70.2    -      -       -      +
    185L  GLU*     1.3    56.7    +      -       -      +
    187L  LEU*     3.2     2.5    +      -       -      +
    188L  GLU*     3.0    26.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 185 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    181L  GLU      3.0    17.4    +      -       -      -
    182L  GLU*     3.3     2.0    +      -       -      +
    184L  LEU*     1.3    76.9    -      -       -      +
    186L  ARG*     1.3    56.7    +      -       -      +
    188L  GLU*     3.6     1.9    +      -       -      +
    189L  GLU*     3.1    22.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 186 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    182L  GLU      3.0    15.2    +      -       -      -
    183L  GLU*     4.0     1.6    -      -       -      +
    184L  LEU      3.4     0.2    -      -       -      -
    185L  GLU*     1.3    73.3    -      -       -      +
    187L  LEU*     1.3    65.5    +      -       -      +
    189L  GLU*     3.9     2.0    -      -       -      +
    190L  ALA*     3.2    18.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 187 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    183L  GLU      3.0    15.0    +      -       -      -
    184L  LEU*     3.2     4.2    +      -       -      +
    186L  ARG*     1.3    77.6    -      -       -      +
    188L  GLU*     1.3    56.1    +      -       -      +
    189L  GLU      3.3     0.2    +      -       -      -
    190L  ALA*     3.3     2.9    +      -       -      -
    191L  CYS*     3.0    24.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 188 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    140L  LYS*     6.1     4.9    -      -       -      +
    184L  LEU      3.0    14.7    +      -       -      -
    185L  GLU*     3.9     2.7    -      -       -      +
    187L  LEU*     1.3    74.4    -      -       -      +
    189L  GLU*     1.3    57.3    +      -       -      +
    191L  CYS*     3.8     2.1    -      -       -      +
    192L  ASP*     3.0    25.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 189 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    185L  GLU      3.1    14.9    +      -       -      -
    186L  ARG*     3.4     4.2    +      -       -      +
    187L  LEU      3.2     0.8    -      -       -      -
    188L  GLU*     1.3    76.9    -      -       -      +
    190L  ALA*     1.3    57.9    -      -       -      +
    192L  ASP*     3.5     1.4    +      -       -      +
    193L  MET*     3.0    22.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 190 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    186L  ARG      3.2    12.8    +      -       -      -
    187L  LEU      3.8     2.5    -      -       -      -
    189L  GLU*     1.3    73.6    -      -       -      +
    191L  CYS*     1.3    59.8    +      -       -      +
    193L  MET*     3.7     3.5    -      -       -      +
    194L  ALA*     2.9    23.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with CYS 191 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    136L  ILE*     5.4     9.4    -      -       -      +
    187L  LEU      3.0    14.5    +      -       -      -
    188L  GLU*     3.3     4.0    +      -       -      +
    189L  GLU      3.3     0.4    -      -       -      -
    190L  ALA*     1.3    75.0    -      -       -      +
    192L  ASP*     1.3    64.0    +      -       -      +
    194L  ALA*     3.1     3.0    +      -       -      +
    195L  LEU*     3.0    20.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 192 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    188L  GLU      3.0    15.6    +      -       -      -
    189L  GLU      3.9     1.8    -      -       -      -
    191L  CYS*     1.3    73.7    -      -       -      +
    193L  MET*     1.3    65.5    +      -       -      +
    195L  LEU*     3.4     1.4    +      -       -      +
    196L  GLU*     3.1    19.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with MET 193 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    189L  GLU      3.0    15.6    +      -       -      -
    190L  ALA*     3.4     4.7    +      -       -      +
    191L  CYS      3.2     0.4    -      -       -      -
    192L  ASP*     1.3    77.7    -      -       -      +
    194L  ALA*     1.3    56.7    +      -       -      +
    196L  GLU*     3.3     1.4    +      -       -      +
    197L  LEU*     3.0    24.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 194 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    107L  LEU*     6.4     2.0    -      -       -      +
    190L  ALA      2.9    15.8    +      -       -      -
    191L  CYS*     3.1     3.5    +      -       -      +
    193L  MET*     1.3    76.2    -      -       -      +
    195L  LEU*     1.3    56.2    +      -       -      +
    197L  LEU*     3.2     3.7    +      -       -      +
    198L  ASN*     2.9    24.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 195 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    191L  CYS      3.0    12.9    +      -       -      -
    192L  ASP*     3.4     2.7    +      -       -      +
    194L  ALA*     1.3    75.6    -      -       -      +
    196L  GLU*     1.3    56.8    +      -       -      +
    198L  ASN*     3.2     2.2    +      -       -      +
    199L  ALA*     3.0    24.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 196 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    192L  ASP      3.1    13.9    +      -       -      -
    193L  MET      3.7     2.9    -      -       -      -
    195L  LEU*     1.3    72.2    -      -       -      +
    197L  LEU*     1.3    64.7    +      -       -      +
    199L  ALA*     3.5     1.3    +      -       -      +
    200L  SER*     3.2    18.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 197 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    193L  MET      3.0    14.5    +      -       -      -
    194L  ALA*     3.2     4.5    +      -       -      +
    196L  GLU*     1.3    77.6    -      -       -      +
    198L  ASN*     1.3    55.8    +      -       -      +
    200L  SER*     3.4     2.0    +      -       -      +
    201L  LYS*     2.9    24.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 198 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    194L  ALA      2.9    13.7    +      -       -      -
    195L  LEU*     3.2     4.4    +      -       -      +
    196L  GLU      3.2     0.2    -      -       -      -
    197L  LEU*     1.3    75.1    -      -       -      +
    199L  ALA*     1.3    59.5    +      -       -      +
    201L  LYS*     3.0     3.5    +      -       -      +
    202L  HIS*     2.9    25.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 199 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    195L  LEU      3.0    14.3    +      -       -      -
    196L  GLU*     4.0     2.0    -      -       -      +
    198L  ASN*     1.3    76.5    -      -       -      +
    200L  SER*     1.3    56.4    +      -       -      +
    202L  HIS*     3.2     2.4    +      -       -      +
    203L  ARG*     2.9    24.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 200 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    196L  GLU      3.2    14.0    +      -       -      -
    197L  LEU      3.7     3.4    -      -       -      -
    199L  ALA*     1.3    70.8    -      -       -      +
    201L  LYS*     1.3    65.7    +      -       -      +
    203L  ARG*     3.3     2.5    +      -       -      +
    204L  ILE*     3.0    20.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 201 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    100L  THR*     5.9     8.1    -      -       -      +
    103L  ILE*     6.6     0.2    -      -       -      +
    197L  LEU      2.9    16.2    +      -       -      -
    198L  ASN*     3.0     5.8    +      -       -      +
    200L  SER*     1.3    78.3    -      -       -      +
    202L  HIS*     1.3    56.8    +      -       -      +
    204L  ILE*     3.2     1.0    +      -       -      -
    205L  TYR*     2.9    25.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with HIS 202 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    198L  ASN      2.9    13.2    +      -       -      -
    199L  ALA*     3.2     3.1    +      -       -      +
    200L  SER      3.2     0.2    -      -       -      -
    201L  LYS*     1.3    72.5    -      -       -      +
    203L  ARG*     1.3    65.5    +      -       -      +
    205L  TYR*     3.2     2.4    +      -       -      +
    206L  GLU*     2.9    22.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 203 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    199L  ALA      2.9    14.3    +      -       -      -
    200L  SER*     3.3     4.9    +      -       -      +
    202L  HIS*     1.3    76.3    -      -       -      +
    204L  ILE*     1.3    58.9    +      -       -      +
    206L  GLU*     3.7     2.4    +      -       -      +
    207L  TYR*     3.3    17.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 204 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     96L  ALA      5.9     5.9    -      -       -      -
    200L  SER      3.0    13.3    +      -       -      -
    201L  LYS      3.7     2.5    -      -       -      -
    203L  ARG*     1.3    75.3    -      -       -      +
    205L  TYR*     1.3    66.2    +      -       -      +
    207L  TYR*     2.9    12.6    +      -       -      +
    208L  VAL*     2.9    13.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 205 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    201L  LYS      2.9    14.6    +      -       -      -
    202L  HIS*     3.2     3.8    +      -       -      +
    204L  ILE*     1.3    73.7    -      -       -      +
    206L  GLU*     1.3    61.9    +      -       -      +
    208L  VAL*     3.4     2.2    +      -       -      +
    209L  GLU*     3.0    19.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 206 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    202L  HIS      2.9    15.1    +      -       -      -
    203L  ARG*     4.0     2.5    -      -       -      +
    205L  TYR*     1.3    74.0    -      -       -      +
    207L  TYR*     1.3    56.4    +      -       -      +
    209L  GLU*     3.2     1.7    +      -       -      +
    210L  SER*     3.0    27.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 207 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    203L  ARG      3.3    11.0    +      -       -      -
    204L  ILE*     2.9     7.9    +      -       -      +
    206L  GLU*     1.3    75.9    -      -       -      +
    208L  VAL*     1.3    57.5    +      -       -      +
    210L  SER*     3.5     0.7    +      -       -      +
    211L  ARG*     2.9    27.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 208 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     93L  ILE*     5.7    10.8    -      -       -      +
     97L  ASN*     6.2     3.4    -      -       -      +
    204L  ILE      2.9    12.1    +      -       -      -
    205L  TYR*     3.8     3.8    -      -       -      +
    207L  TYR*     1.3    73.2    -      -       -      +
    209L  GLU*     1.3    58.2    +      -       -      +
    211L  ARG*     5.4     0.2    -      -       -      +
    212L  MET*     2.9    27.9    +      -       -      -
    225L  ALA*     4.9     8.1    -      -       -      -
    226L  SER      6.1     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 209 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    205L  TYR      3.0    14.8    +      -       -      -
    206L  GLU*     3.2     3.6    +      -       -      +
    208L  VAL*     1.3    75.1    -      -       -      +
    210L  SER*     1.3    62.7    +      -       -      +
    212L  MET      3.8     0.2    -      -       -      -
    213L  SER*     2.9    22.7    +      -       -      -
    225L  ALA*     5.1    11.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 210 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    206L  GLU      3.0    14.8    +      -       -      -
    207L  TYR*     3.9     0.9    -      -       -      +
    209L  GLU*     1.3    75.6    -      -       -      +
    211L  ARG*     1.3    61.8    +      -       -      +
    213L  SER*     3.3     1.8    +      -       -      +
    214L  PHE*     3.2    16.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 211 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    207L  TYR      2.9    16.0    +      -       -      -
    208L  VAL*     5.4     0.2    -      -       -      +
    210L  SER*     1.3    75.9    -      -       -      +
    212L  MET*     1.3    56.8    +      -       -      +
    214L  PHE*     3.0     4.8    +      -       -      +
    215L  ILE*     2.8    25.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with MET 212 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    208L  VAL      2.9    17.6    +      -       -      -
    209L  GLU      3.8     0.4    -      -       -      -
    211L  ARG*     1.3    72.3    -      -       -      +
    213L  SER*     1.3    66.0    +      -       -      +
    215L  ILE*     4.2     2.2    -      -       -      +
    216L  ALA      2.9    29.8    +      -       -      +
    220L  SER*     5.4     3.5    -      -       -      -
    225L  ALA*     5.3    11.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 213 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    209L  GLU      2.9    16.6    +      -       -      -
    210L  SER*     3.3     2.4    +      -       -      +
    212L  MET*     1.3    76.5    -      -       -      +
    214L  PHE*     1.3    57.1    +      -       -      +
    216L  ALA      4.8     0.2    -      -       -      -
    217L  PRO*     3.1    29.6    -      -       -      +
    220L  SER*     5.9     2.5    -      -       -      +
    225L  ALA*     5.9     0.2    -      -       -      +
    312L  THR      5.4     2.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 214 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    210L  SER      3.2     8.9    +      -       -      -
    211L  ARG*     3.0     8.4    +      -       -      +
    213L  SER*     1.3    80.6    -      -       -      +
    215L  ILE*     1.3    59.6    +      -       -      +
    217L  PRO      4.7     1.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 215 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    211L  ARG      2.8    17.5    +      -       -      -
    212L  MET*     3.1     2.8    +      -       -      +
    214L  PHE*     1.3    73.9    -      -       -      +
    216L  ALA*     1.3    57.9    +      -       -      +
    217L  PRO      4.0     0.2    -      -       -      -
    306L  ASP      4.7     9.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 216 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    212L  MET*     2.9    12.3    +      -       -      +
    215L  ILE*     1.3    78.7    -      -       -      +
    217L  PRO*     1.3    65.4    -      -       -      +
    218L  ASN      3.2     3.0    +      -       -      -
    219L  LEU*     3.3     4.8    +      -       -      +
    220L  SER*     2.9    22.7    +      -       -      -
    306L  ASP*     5.4    10.8    -      -       -      +
----------------------------------------------------------
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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