Contacts of the helix formed by residues 141 - 166 (chain K) in PDB entry 2UX1


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 141 (chain K).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    152D  LYS*     5.4     1.5    +      -       -      +
     22K  LEU*     3.7    23.4    -      -       +      +
     25K  SER*     3.7    22.6    -      -       -      +
     79K  ARG*     3.1    24.2    +      -       -      -
     83K  LEU*     3.4    18.2    -      -       -      +
    136K  SER*     2.7    11.9    +      -       -      +
    139K  GLU      3.3     0.2    -      -       -      -
    140K  GLY*     1.3    76.9    -      -       -      +
    142K  SER*     1.3    56.0    +      -       -      +
    143K  VAL*     3.7     0.7    +      -       -      +
    144K  THR*     2.6    28.6    +      -       -      -
    145K  ASN*     3.0    24.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 142 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    130D  GLN*     4.7     8.1    +      -       -      -
    133D  PHE*     3.2    42.6    -      -       -      -
    149D  ASN*     2.8    31.3    +      -       -      -
    152D  LYS*     4.8     5.4    +      -       -      +
    136K  SER      5.2     0.2    -      -       -      -
    140K  GLY      3.3     8.3    +      -       -      -
    141K  ASP*     1.3    71.6    +      -       -      +
    143K  VAL*     1.3    62.0    +      -       -      +
    145K  ASN*     3.4    11.1    +      -       -      +
    146K  ASP      3.0    22.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 143 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    149D  ASN*     3.7    18.2    -      -       -      +
    152D  LYS*     3.9    24.2    -      -       +      +
    153D  ALA*     3.5    47.3    -      -       +      +
    156D  GLU*     4.0     4.0    -      -       -      +
     79K  ARG*     3.6    33.4    -      -       -      +
    141K  ASP*     3.3     1.0    +      -       -      -
    142K  SER*     1.3    74.1    +      -       -      +
    144K  THR*     1.3    67.4    +      -       -      +
    146K  ASP*     3.3     5.9    +      -       -      +
    147K  ILE*     3.2    27.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 144 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     25K  SER*     4.6     5.6    -      -       -      -
     29K  LEU*     4.0    19.3    -      -       +      -
     79K  ARG*     3.2    19.1    +      -       -      +
     83K  LEU*     3.8     2.6    -      -       -      +
    136K  SER*     4.0     9.6    -      -       -      -
    141K  ASP*     2.6    34.5    +      -       -      +
    143K  VAL*     1.3    76.4    -      -       -      +
    145K  ASN*     1.3    66.6    +      -       -      +
    147K  ILE*     3.2    12.3    +      -       +      +
    148K  PHE*     3.1    48.8    +      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 145 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133K  PHE*     2.8    60.7    +      -       -      +
    136K  SER*     3.1    15.5    +      -       -      +
    137K  ASP*     3.5    21.8    -      -       -      +
    141K  ASP      3.0    13.1    +      -       -      +
    142K  SER*     3.4    16.2    -      -       -      +
    144K  THR*     1.3    77.9    -      -       -      +
    146K  ASP*     1.3    57.7    +      -       -      +
    148K  PHE*     3.4     3.5    +      -       -      +
    149K  ASN*     3.0    27.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 146 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    146D  ASP*     4.8     8.8    -      -       -      +
    149D  ASN*     3.8    15.4    +      -       -      +
    150D  VAL*     5.4     8.2    -      -       -      +
    146F  ASP*     4.4    14.2    -      -       -      +
    142K  SER      3.0    16.8    +      -       -      +
    143K  VAL*     3.7     5.6    -      -       -      +
    144K  THR      3.2     0.2    -      -       -      -
    145K  ASN*     1.3    75.7    +      -       -      +
    147K  ILE*     1.3    61.9    +      -       +      +
    149K  ASN*     3.2     7.7    +      -       -      +
    150K  VAL*     3.0    45.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 147 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    153D  ALA*     6.3     0.7    -      -       +      -
     29K  LEU*     5.3     2.2    -      -       +      -
     72K  TYR*     5.7     0.7    -      -       +      -
     75K  GLU*     3.7    40.8    -      -       +      +
     76K  MET*     3.8    30.1    -      -       +      -
     79K  ARG*     3.8    39.3    -      -       +      -
    143K  VAL*     3.2    21.6    +      -       +      +
    144K  THR*     3.2     9.1    +      -       +      +
    146K  ASP*     1.3    77.1    -      -       +      +
    148K  PHE*     1.3    64.1    +      -       +      +
    150K  VAL*     3.5     4.1    +      -       -      +
    151K  ALA*     3.1    22.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 148 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     28K  VAL*     4.0    31.0    -      -       +      -
     29K  LEU*     3.7    21.5    -      -       +      -
     32K  ALA*     4.2     5.2    -      -       +      -
     76K  MET*     3.9    17.0    -      -       +      -
    128K  LEU      4.7     0.4    -      -       -      -
    129K  PHE*     3.5    55.5    -      +       -      +
    132K  GLY*     3.5    26.5    -      -       -      -
    133K  PHE*     3.9     7.4    -      -       -      +
    136K  SER*     4.6     0.2    -      -       -      -
    144K  THR*     3.1    43.0    +      -       +      -
    145K  ASN      3.8     5.6    -      -       -      +
    147K  ILE*     1.3    78.3    -      -       +      +
    149K  ASN*     1.3    56.7    +      -       -      +
    151K  ALA*     3.3     3.7    +      -       -      +
    152K  LYS*     2.9    32.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 149 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    142F  SER*     2.6    51.6    +      -       -      -
    143F  VAL*     3.6     8.8    +      -       -      +
    146F  ASP*     3.6    23.0    +      -       -      +
    133K  PHE*     3.6    16.9    -      -       +      -
    145K  ASN*     3.0    17.7    +      -       -      +
    146K  ASP*     3.2    11.4    +      -       -      +
    148K  PHE*     1.3    76.1    -      -       -      +
    150K  VAL*     1.3    58.2    +      -       +      +
    152K  LYS*     3.5     5.3    +      -       -      +
    153K  ALA*     3.1    28.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 150 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    146F  ASP*     4.9     9.6    -      -       -      +
     72K  TYR*     5.2     8.7    -      -       +      +
    146K  ASP*     3.0    37.5    +      -       -      +
    147K  ILE*     4.0     4.7    -      -       -      +
    149K  ASN*     1.3    74.9    -      -       +      +
    151K  ALA*     1.3    67.1    +      -       -      +
    153K  ALA*     3.4     7.2    +      -       -      +
    154K  SER*     3.3    21.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 151 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     72K  TYR*     3.7    31.6    -      -       +      -
     76K  MET*     4.0     8.7    -      -       +      -
    129K  PHE*     3.5    27.1    -      -       +      -
    147K  ILE      3.1    17.7    +      -       -      +
    148K  PHE      3.7     2.0    -      -       -      +
    150K  VAL*     1.3    78.1    -      -       -      +
    152K  LYS*     1.3    62.4    +      -       -      +
    154K  SER*     3.3     3.8    +      -       -      -
    155K  ILE*     3.0    27.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 152 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     79F  ARG*     6.0     0.2    -      -       -      +
    142F  SER*     5.1     5.4    -      -       -      +
    143F  VAL*     4.4    13.0    -      -       +      +
    126K  ALA*     3.1    31.6    +      -       -      +
    127K  ALA*     5.7     0.2    -      -       -      +
    129K  PHE*     3.8    14.7    -      -       +      +
    130K  GLN*     3.1    43.4    +      -       -      +
    133K  PHE*     5.8     2.7    -      -       +      -
    148K  PHE      2.9    18.4    +      -       -      +
    149K  ASN*     3.8     6.5    -      -       -      +
    150K  VAL      3.3     0.2    -      -       -      -
    151K  ALA*     1.3    77.4    -      -       -      +
    153K  ALA*     1.3    55.5    +      -       -      +
    155K  ILE*     3.4     3.7    +      -       -      +
    156K  GLU*     2.5    72.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 153 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     79F  ARG*     4.9     2.4    +      -       -      -
    143F  VAL*     3.3    35.3    -      -       +      +
    147F  ILE*     6.2     0.2    -      -       +      -
    149K  ASN      3.1    15.4    +      -       -      +
    150K  VAL*     3.6     9.2    -      -       -      +
    151K  ALA      3.3     0.4    -      -       -      -
    152K  LYS*     1.3    76.3    -      -       -      +
    154K  SER*     1.3    60.7    +      -       -      +
    156K  GLU*     4.0     3.6    -      -       -      +
    157K  LYS*     3.1    23.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 154 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     68K  GLU*     2.6    30.9    +      -       -      -
     72K  TYR*     3.2    13.0    -      -       -      -
    150K  VAL*     3.3     8.0    +      -       -      -
    151K  ALA      3.8     1.6    -      -       -      -
    152K  LYS      3.3     0.4    -      -       -      -
    153K  ALA*     1.3    75.7    -      -       -      +
    155K  ILE*     1.3    66.3    +      -       -      +
    157K  LYS*     3.2    16.1    +      -       -      +
    158K  HIS*     2.9    31.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 155 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     68K  GLU*     4.1    13.2    -      -       -      +
     69K  ILE*     4.3    17.0    -      -       +      -
     72K  TYR*     4.2     9.9    -      -       +      -
    122K  PHE*     3.4    49.1    -      -       +      +
    125K  LEU*     4.6     5.8    -      -       +      -
    126K  ALA*     4.0    14.6    -      -       +      +
    129K  PHE*     4.0    18.2    -      -       +      -
    151K  ALA      3.0    20.8    +      -       -      +
    152K  LYS*     3.8     6.1    -      -       -      +
    154K  SER*     1.3    75.2    -      -       -      +
    156K  GLU*     1.3    63.6    +      -       -      +
    158K  HIS*     3.1    16.0    +      -       +      +
    159K  ILE*     3.0    21.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 156 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     79F  ARG*     2.6    47.6    +      -       -      +
     82F  THR*     3.5    10.9    -      -       -      +
    143F  VAL*     4.3     3.8    -      -       -      +
    126K  ALA*     4.2    16.6    -      -       +      +
    152K  LYS*     2.5    57.5    +      -       -      +
    153K  ALA      4.0     1.3    -      -       -      +
    155K  ILE*     1.3    75.8    -      -       -      +
    157K  LYS*     1.3    63.1    +      -       -      +
    159K  ILE*     3.3    10.0    +      -       -      +
    160K  TRP      3.1    17.7    +      -       -      -
    172K  LEU*     3.7    32.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 157 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     78F  GLU*     4.7    10.2    +      -       +      +
     82F  THR*     4.4    11.8    -      -       -      +
    153K  ALA      3.1    14.4    +      -       -      +
    154K  SER*     3.5    18.8    -      -       -      +
    156K  GLU*     1.3    77.2    -      -       -      +
    158K  HIS*     1.3    69.3    +      -       -      +
    160K  TRP*     3.2    28.8    +      -       +      +
    161K  MET*     3.2    31.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with HIS 158 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65K  TYR*     3.7    35.8    +      +       +      -
     68K  GLU*     2.6    36.7    +      -       -      -
     69K  ILE*     6.1     0.4    -      -       +      -
    122K  PHE*     3.7    23.8    -      +       +      -
    154K  SER*     2.9    27.4    +      -       -      -
    155K  ILE*     3.1    12.1    +      -       +      +
    157K  LYS*     1.3    84.0    -      -       -      +
    159K  ILE*     1.3    58.2    +      -       -      +
    161K  MET*     3.2    13.4    +      -       -      +
    162K  LEU*     2.8    36.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 159 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    119K  VAL*     4.4     8.5    -      -       +      +
    122K  PHE*     3.7    24.2    -      -       +      +
    123K  ARG*     3.8    39.0    -      -       +      +
    126K  ALA*     4.3     6.1    -      -       +      -
    155K  ILE*     3.0    21.0    +      -       +      +
    156K  GLU*     3.5    10.5    -      -       -      +
    157K  LYS      3.2     0.2    -      -       -      -
    158K  HIS*     1.3    75.6    -      -       -      +
    160K  TRP*     1.3    63.2    +      -       -      +
    162K  LEU*     4.0     6.4    -      -       -      +
    163K  GLN*     2.9    31.1    +      -       +      +
    170K  PRO      3.9    15.5    -      -       -      +
    172K  LEU*     3.8    29.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with TRP 160 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     78F  GLU*     3.4    44.9    -      -       +      -
     81F  ILE*     3.4    35.6    -      -       +      +
     82F  THR*     3.5    29.8    -      -       +      +
     47H  HIS      4.8     0.2    -      -       -      -
     48H  TRP*     4.5     9.7    +      -       -      -
     50H  MET      5.4     0.4    +      -       -      -
     51H  ARG*     6.2     1.6    -      -       -      -
     55H  PHE*     4.0    12.7    -      +       -      -
     59H  HIS*     3.6    24.5    -      +       -      -
    107H  TYR*     5.8     0.2    -      -       -      -
    156K  GLU      3.1     9.6    +      -       -      +
    157K  LYS*     3.2    26.9    +      -       +      +
    159K  ILE*     1.3    76.5    -      -       -      +
    161K  MET*     1.3    75.6    +      -       +      +
    163K  GLN*     3.7     1.7    -      -       -      +
    164K  ALA*     2.9    37.5    +      -       +      +
    168K  GLN      4.9     1.2    -      -       -      +
    170K  PRO*     4.0    27.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with MET 161 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     78F  GLU*     5.2     1.6    -      -       -      +
     55H  PHE*     3.7    21.4    -      -       +      -
     56H  MET*     3.7    31.5    -      -       +      +
     59H  HIS*     3.5    35.2    -      -       +      +
     65K  TYR*     5.4     1.6    -      -       -      +
    157K  LYS*     3.2    25.3    +      -       +      +
    158K  HIS*     3.6    15.7    -      -       -      +
    160K  TRP*     1.3    97.2    -      -       +      +
    162K  LEU*     1.3    65.4    +      -       -      +
    164K  ALA*     3.4     2.3    +      -       -      +
    165K  GLU*     3.0    22.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 162 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     58K  TRP*     3.7    28.3    -      -       +      -
     65K  TYR*     3.8    16.2    -      -       +      +
    115K  LEU*     3.9    25.7    -      -       +      +
    118K  VAL*     4.0    13.2    -      -       +      -
    119K  VAL*     3.5    22.7    -      -       +      -
    122K  PHE*     3.7    34.5    -      -       +      -
    158K  HIS      2.8    25.8    +      -       -      +
    159K  ILE*     4.0     2.7    -      -       -      +
    161K  MET*     1.3    71.9    -      -       -      +
    163K  GLN*     1.3    62.5    +      -       -      +
    165K  GLU*     3.2     9.3    +      -       -      +
    166K  LEU*     3.1    27.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 163 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    116K  ALA*     5.8     0.2    -      -       -      -
    119K  VAL*     3.5    21.8    -      -       +      +
    123K  ARG*     3.2    29.7    -      -       -      +
    159K  ILE*     2.9    24.9    +      -       +      +
    160K  TRP      3.8     3.1    -      -       -      +
    162K  LEU*     1.3    75.4    -      -       -      +
    164K  ALA*     1.3    56.9    +      -       -      +
    166K  LEU*     3.0    22.2    +      -       -      +
    167K  GLY      3.1     0.2    +      -       -      -
    168K  GLN*     2.8    57.6    +      -       -      +
    169K  ALA      3.1    32.6    +      -       -      +
    170K  PRO*     3.9     5.8    -      -       +      +
    171K  LYS*     3.5     6.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 164 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     50H  MET      3.8     8.5    -      -       -      +
     51H  ARG*     3.4     8.5    -      -       +      +
     52H  GLY      2.5    32.5    +      -       -      -
     55H  PHE*     3.6    32.8    -      -       +      -
    160K  TRP*     2.9    26.3    +      -       +      +
    161K  MET      3.7     3.1    -      -       -      +
    162K  LEU      3.3     0.2    -      -       -      -
    163K  GLN*     1.3    73.6    -      -       -      +
    165K  GLU*     1.3    59.7    +      -       -      +
    167K  GLY      2.9     5.2    +      -       -      -
    168K  GLN      3.5     9.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 165 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     52H  GLY*     3.1    25.7    -      -       -      -
     53H  ARG*     2.9    37.2    +      -       -      +
     54H  GLY*     3.1    18.9    +      -       -      -
     55H  PHE*     3.2     8.2    +      -       +      +
     56H  MET*     3.0    29.5    +      -       -      +
     58K  TRP*     3.5    37.2    +      -       +      -
    115K  LEU*     3.8    16.4    -      -       +      -
    161K  MET      3.0    13.0    +      -       -      +
    162K  LEU      3.4    10.1    -      -       -      +
    164K  ALA*     1.3    74.1    -      -       -      +
    166K  LEU*     1.3    56.9    +      -       +      +
    167K  GLY      3.2     1.2    +      -       -      -
    173K  EPE      4.3     2.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 166 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     53H  ARG*     5.1     2.9    -      -       -      +
    112K  GLU*     3.8    39.3    -      -       +      +
    115K  LEU*     3.9    24.2    -      -       +      -
    116K  ALA*     3.9    28.9    -      -       +      +
    119K  VAL*     4.3     3.8    -      -       +      -
    162K  LEU      3.1    13.0    +      -       -      +
    163K  GLN*     3.0    28.7    +      -       -      +
    165K  GLU*     1.3    76.7    -      -       +      +
    167K  GLY*     1.3    60.4    +      -       -      +
    168K  GLN*     3.3    28.3    +      -       -      +
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


   I  Hydrophilic      - N and O that can donate and accept hydrogen bonds
                         (e.g., oxygen of hydroxyl group of Ser. or Thr)
  II  Acceptor         - N or O that can only accept a hydrogen bond
 III  Donor            - N that can only donate a hydrogen bond
  IV  Hydrophobic      - Cl, Br, I and all C atoms that are not in
                         aromatic rings and do not have a covalent bond to
                         a N or O atom
   V  Aromatic         - C in aromatic rings irrespective of any other 
                         bonds formed by the atom
  VI  Neutral          - C atoms that have a covalent bond to at least one
                         atom of class I or two or more atoms from class II
                         or III; atoms; S, F, P, and metal atoms in all cases
 VII  Neutral-donor    - C atoms that have a covalent bond with only one
                         atom of class III
VIII  Neutral-acceptor - C atoms that have a covalent bond with only 
                         one atom of class II
For each pair of contacts the state of legitimacy is shown below:

Legend:
+, legitimate
-, illegitimate
------------------------------------------------------------
  Atomic class           I  II  III   IV   V   VI  VII  VIII
------------------------------------------------------------
   I  (Hydrophilic)      +   +    +    -   +   +    +    +
  II  (Acceptor)         +   -    +    -   +   +    +    -
 III  (Donor)            +   +    -    -   +   +    -    +
  IV  (Hydrophobic)      -   -    -    +   +   +    +    +
   V  (Aromatic)         +   +    +    +   +   +    +    +
  VI  (Neutral)          +   +    +    +   +   +    +    +
 VII  (Neutral-donor)    +   +    -    +   +   +    -    +
VIII  (Neutral-acceptor) +   -    +    +   +   +    +    -
------------------------------------------------------------
Warning!
Atom classes for heterogroups are automatically assigned based on the atomic coordinates. However, in three cases (see below) the automatic assignment is currently ambiguous. In these cases, the user is advised to manually analyse the full list of contacts using LPC software.
1. Carbon atoms belonging to a 4-, 5- or 6-member ring are 
   considered "aromatic" (Class V) if the ring is approximately
   planar, and "hydrophobic" (Class IV) or "neutral" (Classes
   VI, VII, VIII) if the ring is non-planar.
2. The oxygen atom of a carbonyl or hydroxy group is considered
   "hydroxy" (Class I) if the CO bond is longer than 1.29 Å, and
   "carbonyl" (Class II) if shorter.
3. All nitrogen atoms are considered "hydrophilic" (Class I).

Please E-mail any questions and/or suggestions concerning this page to Vladimir.Sobolev@weizmann.ac.il