Contacts of the helix formed by residues 182 - 206 (chain L) in PDB entry 4XLN


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 PRO 182 (chain L).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    406J  ASP*     5.4     1.1    -      -       -      -
    180L  SER      4.4     2.7    -      -       -      +
    181L  LEU*     1.3    90.2    -      -       +      +
    183L  LYS*     1.3    57.5    +      -       +      +
    184L  GLU*     4.8     2.2    -      -       +      +
    185L  LEU*     3.3    24.9    +      -       +      +
    186L  LYS*     2.7    35.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 183 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    403J  PHE*     4.5    10.7    -      -       -      -
    404J  GLU      3.9    10.7    +      -       -      -
    405J  ASP*     5.2     1.8    -      -       -      -
    406J  ASP*     3.3    54.7    +      -       +      +
    442J  ASN*     4.8     6.3    +      -       -      -
    182L  PRO*     1.3    76.3    -      -       +      +
    184L  GLU*     1.3    78.0    +      -       +      +
    185L  LEU      3.0     0.3    +      -       -      -
    186L  LYS      3.8     0.2    -      -       -      -
    187L  ARG*     3.0    44.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 184 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    182L  PRO*     3.6     4.1    -      -       +      +
    183L  LYS*     1.3    90.6    -      -       +      +
    185L  LEU*     1.3    62.3    +      -       +      +
    187L  ARG*     3.3    22.8    +      -       -      +
    188L  TYR*     3.0    31.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 185 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    130L  LYS*     5.4     4.9    -      -       +      +
    131L  LEU*     3.6    13.3    -      -       +      +
    134L  ALA*     4.0    26.0    -      -       +      +
    181L  LEU*     3.6    31.2    -      -       +      -
    182L  PRO*     3.3    30.1    +      -       +      +
    183L  LYS      3.1     0.4    -      -       -      -
    184L  GLU*     1.3    77.2    -      -       +      +
    186L  LYS*     1.3    67.0    +      -       -      +
    187L  ARG      3.0     3.5    +      -       -      -
    188L  TYR*     3.0    26.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 186 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    406J  ASP*     3.1    30.6    +      -       -      +
    407J  VAL      4.6     5.5    +      -       -      +
    131L  LEU*     5.6     0.2    -      -       -      -
    178L  LEU      3.7    20.4    -      -       -      +
    179L  LYS*     3.6    47.4    +      -       +      +
    181L  LEU*     3.2    22.5    +      -       -      +
    182L  PRO      2.7    20.6    +      -       -      +
    185L  LEU*     1.3    73.3    -      -       -      +
    187L  ARG*     1.3    60.2    +      -       -      +
    188L  TYR      3.4     0.2    -      -       -      -
    189L  LEU*     3.3    37.8    -      -       +      +
    190L  HIS*     3.3    12.3    +      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 187 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    406J  ASP*     4.2     9.1    +      -       -      +
    439J  LEU*     5.3    10.9    -      -       +      +
    183L  LYS*     3.0    31.0    +      -       -      +
    184L  GLU*     3.3    35.9    +      -       -      +
    185L  LEU      3.0     0.2    +      -       -      -
    186L  LYS*     1.3    73.8    -      -       -      +
    188L  TYR*     1.3    80.0    +      -       +      +
    189L  LEU      3.0     5.4    -      -       -      -
    190L  HIS*     3.0    13.3    +      -       +      +
    191L  ILE*     3.0    51.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 188 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    123L  GLU      5.8     0.2    -      -       -      -
    126L  GLU      5.3     0.4    -      -       -      -
    127L  ALA*     3.4    38.0    -      -       +      +
    130L  LYS*     3.4    44.2    +      -       +      +
    131L  LEU*     3.5    20.2    -      -       +      +
    184L  GLU*     3.0    31.2    -      -       +      -
    185L  LEU*     3.0    15.7    +      -       +      +
    187L  ARG*     1.3    97.2    +      -       +      +
    189L  LEU*     1.3    56.7    +      -       -      +
    191L  ILE*     3.8    17.9    -      -       +      -
    192L  ALA*     2.9    28.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 189 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    410J  THR*     3.8    13.9    -      -       +      -
    131L  LEU*     3.6    17.4    -      -       +      +
    146L  VAL*     5.3     9.4    -      -       +      -
    178L  LEU*     5.7     1.3    -      -       +      +
    179L  LYS*     6.4     0.4    -      -       +      -
    185L  LEU      3.9     1.6    +      -       -      +
    186L  LYS*     3.3    30.7    +      -       +      +
    188L  TYR*     1.3    75.7    -      -       -      +
    190L  HIS*     1.3    84.1    +      -       +      +
    192L  ALA*     3.1     5.1    +      -       -      +
    193L  ARG*     3.0    58.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 190 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    406J  ASP*     5.2     1.8    -      -       -      -
    407J  VAL*     3.3    30.3    -      -       +      +
    409J  VAL      3.5     9.7    +      -       -      -
    410J  THR*     3.8     7.3    -      -       +      -
    411J  THR*     3.8    19.7    +      -       -      +
    437J  VAL*     3.8    23.1    -      -       +      -
    439J  LEU*     3.8    19.7    -      -       +      -
    186L  LYS*     3.3    22.1    +      -       +      -
    187L  ARG*     3.0     9.9    +      -       -      +
    189L  LEU*     1.3    93.1    -      -       +      +
    191L  ILE*     1.3    66.9    +      -       -      +
    193L  ARG*     3.2    11.8    -      -       +      +
    194L  GLU*     2.9    31.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 191 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    439J  LEU*     4.1    18.6    -      -       +      +
    120L  LYS*     4.6     1.1    -      -       -      +
    123L  GLU*     3.8    38.6    -      -       +      +
    124L  GLY*     3.6     3.4    -      -       -      +
    127L  ALA*     3.9     3.1    -      -       +      -
    187L  ARG*     3.0    41.4    +      -       -      +
    188L  TYR*     3.6    35.4    -      -       +      +
    190L  HIS*     1.3    76.5    -      -       -      +
    192L  ALA*     1.3    61.9    +      -       -      +
    194L  GLU*     3.3     7.6    +      -       -      +
    195L  GLY*     3.0    18.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 192 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    124L  GLY*     3.7    16.5    -      -       -      +
    127L  ALA*     4.1     0.9    -      -       +      +
    128L  ILE*     3.8    27.7    -      -       +      +
    131L  LEU*     4.5     4.9    -      -       +      -
    146L  VAL*     4.5     9.9    -      -       +      -
    188L  TYR      2.9    15.4    +      -       -      +
    189L  LEU*     3.2    12.6    -      -       -      +
    191L  ILE*     1.3    75.7    -      -       -      +
    193L  ARG*     1.3    63.6    +      -       -      +
    195L  GLY*     3.0     5.2    +      -       -      -
    196L  GLU*     2.9    24.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 193 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    410J  THR*     3.7    20.4    -      -       -      +
    411J  THR*     4.0    34.4    +      -       -      +
    146L  VAL*     3.6    27.8    +      -       +      +
    149L  LYS*     3.5    35.8    +      -       -      +
    150L  ILE*     3.3    42.2    -      -       +      +
    189L  LEU*     3.0    45.5    +      -       -      +
    190L  HIS*     3.2    22.8    -      -       -      +
    192L  ALA*     1.3    72.6    -      -       -      +
    194L  GLU*     1.3    62.4    +      -       -      +
    196L  GLU*     3.1     3.0    +      -       -      +
    197L  ALA*     2.9    23.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 194 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    411J  THR*     5.1     3.5    +      -       -      +
    437J  VAL      4.3     8.5    -      -       -      +
    439J  LEU*     3.3    40.0    +      -       -      +
    120L  LYS*     3.8    29.2    +      -       +      +
    190L  HIS*     2.9    18.5    +      -       -      +
    191L  ILE*     3.3     6.5    -      -       +      +
    193L  ARG*     1.3    78.6    -      -       -      +
    195L  GLY*     1.3    61.7    +      -       -      +
    197L  ALA*     3.2     9.0    +      -       -      +
    198L  ALA*     3.0    21.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 195 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    120L  LYS*     3.2    31.5    -      -       -      +
    121L  VAL*     3.6    13.6    -      -       -      +
    124L  GLY*     4.3     4.3    -      -       -      -
    191L  ILE      3.0    12.2    +      -       -      -
    192L  ALA      3.0     4.7    +      -       -      -
    194L  GLU*     1.3    76.3    -      -       -      +
    196L  GLU*     1.3    56.9    +      -       -      +
    198L  ALA*     3.1     3.5    +      -       -      +
    199L  ARG*     2.9    26.0    +      -       -      +
----------------------------------------------------------
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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
----------------------------------------------------------
    128L  ILE*     5.1     4.3    -      -       +      -
    143L  ARG*     2.9    48.4    +      -       -      +
    146L  VAL*     3.6    22.1    -      -       +      +
    147L  ARG*     3.2    22.7    +      -       +      +
    150L  ILE*     5.5     7.0    -      -       +      -
    192L  ALA      2.9    13.0    +      -       -      +
    193L  ARG*     3.1    12.3    +      -       -      +
    195L  GLY*     1.3    76.1    -      -       -      +
    197L  ALA*     1.3    60.1    +      -       -      +
    199L  ARG*     3.1    34.6    +      -       -      +
    200L  GLN*     3.2    27.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 197 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    150L  ILE*     5.3    13.0    -      -       +      +
    193L  ARG      2.9    12.4    +      -       -      +
    194L  GLU*     3.2     9.6    +      -       +      +
    196L  GLU*     1.3    73.6    -      -       -      +
    198L  ALA*     1.3    66.7    +      -       -      +
    200L  GLN*     3.1    12.7    +      -       -      +
    201L  HIS*     3.0    33.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 198 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    117L  LEU*     3.6    21.7    -      -       +      +
    120L  LYS*     3.7    30.0    -      -       +      +
    121L  VAL*     3.7    15.2    -      -       +      +
    194L  GLU      3.0    13.8    +      -       -      +
    195L  GLY      3.1     9.8    +      -       -      +
    197L  ALA*     1.3    76.3    -      -       -      +
    199L  ARG*     1.3    55.7    +      -       -      +
    201L  HIS*     3.4     3.4    +      -       -      -
    202L  LEU*     2.9    30.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 199 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    560J  GLN*     4.4     9.3    +      -       -      -
    561J  GLY      4.4     9.1    +      -       -      -
    562J  ALA*     5.4     1.2    -      -       -      +
    121L  VAL*     3.6    18.1    -      -       +      +
    143L  ARG*     3.7    15.4    -      -       -      +
    147L  ARG*     3.2    35.6    -      -       -      +
    195L  GLY      2.9    11.8    +      -       -      +
    196L  GLU*     3.1    34.3    +      -       -      +
    197L  ALA      3.2     0.2    -      -       -      -
    198L  ALA*     1.3    77.0    -      -       -      +
    200L  GLN*     1.3    75.8    +      -       -      +
    202L  LEU*     3.2     6.8    +      -       -      +
    203L  ILE*     2.9    39.7    +      -       +      +
    236L  ILE*     4.0    18.6    -      -       -      +
    239L  VAL*     4.1    15.2    -      -       +      +
    240L  GLU*     3.2    31.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 200 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    561J  GLY      4.0     8.3    +      -       -      -
    562J  ALA      3.7     2.6    -      -       -      -
    563J  PRO*     3.2    38.3    -      -       +      +
    147L  ARG*     6.0     1.4    -      -       -      +
    150L  ILE*     6.0     4.7    -      -       +      -
    151L  LEU*     6.0     6.3    -      -       +      -
    196L  GLU*     3.2    25.4    +      -       -      +
    197L  ALA*     3.1    10.5    +      -       -      +
    199L  ARG*     1.3   104.3    -      -       -      +
    201L  HIS*     1.3    66.3    +      -       +      +
    203L  ILE*     3.2     7.4    +      -       -      +
    204L  GLU*     2.9    43.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 201 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    106L  VAL*     5.6     1.2    -      -       -      +
    117L  LEU*     4.0    21.6    -      -       +      +
    197L  ALA*     3.0    22.9    +      -       +      +
    198L  ALA*     3.7     7.8    -      -       -      +
    200L  GLN*     1.3    76.8    -      -       +      +
    202L  LEU*     1.3    58.0    +      -       -      +
    204L  GLU*     3.5    19.6    +      -       -      +
    205L  ALA*     2.9    31.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 202 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    109L  LEU*     5.0     2.9    -      -       +      -
    114L  GLU*     5.2     4.7    -      -       +      +
    117L  LEU*     3.9    17.9    -      -       +      +
    118L  ALA*     4.2    32.1    -      -       +      +
    121L  VAL*     4.6     8.7    -      -       +      -
    198L  ALA      2.9    13.3    +      -       -      +
    199L  ARG      3.3    10.1    -      -       -      +
    201L  HIS*     1.3    76.3    -      -       -      +
    203L  ILE*     1.3    61.6    -      -       -      +
    205L  ALA*     3.3     1.5    +      -       -      -
    206L  ASN*     2.9    46.6    +      -       -      +
    239L  VAL*     3.8    24.0    -      -       +      +
    242L  PHE*     5.5     6.5    -      -       +      -
    250L  PHE*     3.6    28.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 203 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    563J  PRO*     3.9    31.2    -      -       +      -
    566J  ILE*     4.2    14.6    -      -       +      -
    199L  ARG*     2.9    32.8    +      -       +      +
    200L  GLN*     3.2     6.5    +      -       -      +
    202L  LEU*     1.3    75.9    -      -       -      +
    204L  GLU*     1.3    63.6    +      -       -      +
    207L  LEU*     3.1    20.1    +      -       +      +
    235L  LEU*     3.3    27.3    -      -       +      +
    236L  ILE*     3.8    40.2    -      -       +      -
    239L  VAL*     3.6    19.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 204 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    563J  PRO*     3.6    18.8    -      -       +      +
    564J  GLU      5.0     0.5    +      -       -      -
    565J  ILE*     3.6    32.8    -      -       +      +
    103L  ILE*     5.5     2.6    -      -       -      +
    106L  VAL*     4.6    28.8    -      -       +      +
    200L  GLN*     2.9    38.4    +      -       -      +
    201L  HIS*     3.9    20.2    +      -       -      +
    203L  ILE*     1.3    76.3    -      -       -      +
    205L  ALA*     1.3    62.1    +      -       -      +
    207L  LEU*     3.3    26.4    +      -       +      +
    208L  ARG*     4.6     5.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 205 (chain L). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    106L  VAL*     4.6     6.9    -      -       +      +
    107L  PRO      4.4    15.0    -      -       -      +
    108L  LEU*     3.6    16.6    -      -       -      +
    109L  LEU*     3.7    35.0    -      -       +      -
    117L  LEU*     5.2     1.3    -      -       +      -
    201L  HIS      2.9    18.4    +      -       -      +
    202L  LEU      3.7     4.7    -      -       -      +
    203L  ILE      3.3     0.2    -      -       -      -
    204L  GLU*     1.3    77.7    -      -       -      +
    206L  ASN*     1.3    59.2    +      -       -      +
    207L  LEU      3.4     0.7    +      -       -      -
    208L  ARG*     3.9     7.6    -      -       -      -
     30R    T      3.4     9.0    -      -       -      +
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Residues in contact with ASN 206 (chain L). Click here for Legend to table.
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                                  Specific contacts
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     Residue       Dist    Surf   HB    Arom    Phob    DC
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    109L  LEU*     3.6    19.8    -      -       -      +
    114L  GLU*     4.4     2.0    +      -       -      +
    202L  LEU*     2.9    43.9    +      -       -      +
    203L  ILE      3.8     3.1    -      -       -      +
    204L  GLU      3.3     0.2    -      -       -      -
    205L  ALA*     1.3    75.8    -      -       -      +
    207L  LEU*     1.3    63.7    +      -       -      +
    208L  ARG      3.1     2.2    -      -       -      -
    209L  LEU*     3.0    23.8    +      -       +      +
    210L  VAL*     3.5     7.8    +      -       -      +
    235L  LEU*     4.1     7.6    -      -       +      -
    250L  PHE*     3.5    28.4    -      -       +      +
    251L  SER*     5.0     1.6    +      -       -      -
     30R    T      2.8    40.5    +      -       +      +
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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
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  Atomic class           I  II  III   IV   V   VI  VII  VIII
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   I  (Hydrophilic)      +   +    +    -   +   +    +    +
  II  (Acceptor)         +   -    +    -   +   +    +    -
 III  (Donor)            +   +    -    -   +   +    -    +
  IV  (Hydrophobic)      -   -    -    +   +   +    +    +
   V  (Aromatic)         +   +    +    +   +   +    +    +
  VI  (Neutral)          +   +    +    +   +   +    +    +
 VII  (Neutral-donor)    +   +    -    +   +   +    -    +
VIII  (Neutral-acceptor) +   -    +    +   +   +    +    -
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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