Contacts of the helix formed by residues 169 - 195 (chain A) in PDB entry 1KYZ


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 169 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    135A  VAL*     3.7     7.1    -      -       -      +
    165A  TYR*     2.6    46.5    +      -       +      +
    166A  HIS*     3.5     4.9    +      -       -      +
    167A  GLY      3.5     0.4    -      -       -      -
    168A  THR*     1.3    83.7    +      -       -      +
    170A  PRO*     1.3    60.2    -      -       -      +
    171A  ARG*     3.3    15.8    +      -       -      +
    172A  PHE*     3.0    27.1    +      -       +      +
    173A  ASN*     2.8    28.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with PRO 170 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    166A  HIS      5.2     0.4    -      -       -      +
    167A  GLY      5.5     1.8    -      -       -      +
    168A  THR      3.9     5.6    -      -       -      +
    169A  ASP*     1.3    86.6    -      -       -      +
    171A  ARG*     1.3    60.7    +      -       +      +
    173A  ASN*     3.6     8.2    -      -       +      +
    174A  LYS*     2.9    36.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 171 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133A  ASP*     2.7    44.0    +      -       -      -
    134A  LYS*     3.9    26.6    -      -       -      +
    135A  VAL*     3.6    18.4    -      -       -      +
    169A  ASP*     3.3    11.1    +      -       -      +
    170A  PRO*     1.3    83.5    -      -       +      +
    172A  PHE*     1.3    70.7    -      -       -      +
    174A  LYS*     3.3     5.7    +      -       -      +
    175A  VAL*     3.2    36.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 172 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    130A  MET*     4.9     1.6    -      -       +      -
    133A  ASP*     3.6    27.1    -      -       +      -
    135A  VAL*     3.8    20.4    -      -       +      -
    136A  LEU*     3.6    44.6    -      -       +      -
    154A  PHE*     5.3     1.8    -      +       -      -
    165A  TYR*     4.0    14.6    -      +       -      -
    166A  HIS*     3.7    33.2    -      +       -      -
    169A  ASP*     3.0    25.2    +      -       +      +
    171A  ARG*     1.3    87.4    -      -       -      +
    173A  ASN*     1.3    58.7    +      -       -      +
    175A  VAL*     3.0     7.2    +      -       +      -
    176A  PHE*     2.7    51.7    +      +       +      +
----------------------------------------------------------
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Residues in contact with ASN 173 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    166A  HIS*     3.7    37.5    -      -       -      +
    169A  ASP      2.8    18.8    +      -       -      +
    170A  PRO*     3.6     9.1    +      -       +      +
    172A  PHE*     1.3    78.2    -      -       -      +
    174A  LYS*     1.3    68.2    +      -       -      +
    176A  PHE*     3.6     5.3    -      -       -      +
    177A  ASN*     3.0    55.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 174 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    170A  PRO*     2.9    25.3    +      -       +      +
    171A  ARG*     3.7     6.7    -      -       -      +
    172A  PHE      3.2     0.6    -      -       -      -
    173A  ASN*     1.3    83.9    -      -       -      +
    175A  VAL*     1.3    68.3    +      -       +      +
    177A  ASN*     3.4     7.5    +      -       -      +
    178A  LYS*     3.0    32.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 175 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    126A  ALA      4.8     1.3    -      -       -      +
    129A  LEU*     3.7    18.4    -      -       +      +
    130A  MET*     3.7    30.6    -      -       +      +
    133A  ASP*     4.2    10.3    -      -       +      +
    171A  ARG*     3.2    31.2    +      -       +      +
    172A  PHE*     3.0    11.8    +      -       +      +
    174A  LYS*     1.3    77.4    -      -       +      +
    176A  PHE*     1.3    63.8    +      -       -      +
    178A  LYS*     3.4     5.1    +      -       -      +
    179A  GLY*     3.0    19.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 176 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    130A  MET*     2.6    42.8    -      -       +      +
    163A  PHE*     4.6    11.4    -      +       -      -
    166A  HIS*     3.1    35.7    -      +       +      +
    172A  PHE*     2.7    36.1    +      +       +      +
    173A  ASN      3.6     3.6    -      -       -      +
    175A  VAL*     1.3    74.2    -      -       -      +
    177A  ASN*     1.3    72.4    +      -       -      +
    180A  MET*     3.0    31.9    +      -       +      +
    366A  FER      3.6    57.9    -      +       -      -
----------------------------------------------------------
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Residues in contact with ASN 177 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    166A  HIS*     5.6     0.2    -      -       -      -
    173A  ASN*     3.0    48.7    +      -       -      +
    174A  LYS*     3.8    10.6    -      -       -      +
    176A  PHE*     1.3    86.6    -      -       -      +
    178A  LYS*     1.3    53.9    +      -       -      +
    180A  MET*     3.7     4.0    -      -       -      +
    181A  SER*     2.7    39.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 178 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    117A  LYS*     6.2     1.6    -      -       -      +
    121A  GLY      5.9     2.5    -      -       -      +
    126A  ALA*     4.0    12.3    -      -       +      -
    129A  LEU*     6.4     2.7    -      -       +      -
    174A  LYS*     3.0    23.3    +      -       -      +
    175A  VAL*     3.8     5.4    -      -       -      +
    177A  ASN*     1.3    76.8    -      -       -      +
    179A  GLY*     1.3    58.6    +      -       -      +
    181A  SER*     4.1     5.2    -      -       -      -
    182A  ASP*     2.9    47.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 179 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    126A  ALA*     3.7    25.9    -      -       -      +
    127A  LEU*     3.3    10.0    -      -       -      +
    130A  MET*     3.1    18.2    -      -       -      -
    175A  VAL      3.0    11.7    +      -       -      -
    178A  LYS*     1.3    76.4    -      -       -      +
    180A  MET*     1.3    56.0    +      -       -      +
    182A  ASP*     4.1     0.7    -      -       -      +
    183A  HIS*     3.1    29.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 180 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    127A  LEU*     5.1     4.5    -      -       -      -
    130A  MET*     3.6    17.7    -      -       +      +
    176A  PHE*     3.0    42.4    +      -       +      +
    177A  ASN*     3.9     4.0    -      -       -      +
    179A  GLY*     1.3    74.3    -      -       -      +
    181A  SER*     1.3    60.4    +      -       -      +
    183A  HIS*     3.8     6.9    -      -       -      +
    184A  SER*     2.9    31.0    +      -       -      -
    266A  TRP*     4.7    20.8    -      -       +      -
    269A  HIS*     6.3     2.2    -      -       +      +
    366A  FER      4.3    35.2    -      -       +      +
   1698A  SAH      5.6    10.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 181 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    177A  ASN      2.7    24.1    +      -       -      -
    178A  LYS*     3.7     6.7    -      -       -      -
    180A  MET*     1.3    72.6    -      -       -      +
    182A  ASP*     1.3    66.0    +      -       -      +
    184A  SER*     3.3     5.6    +      -       -      -
    185A  THR*     2.9    36.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 182 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121A  GLY      3.7     5.8    -      -       -      +
    122A  VAL*     3.2    30.1    -      -       +      +
    123A  SER      2.8    40.3    +      -       -      +
    124A  ILE*     5.9     0.4    -      -       -      -
    126A  ALA*     3.8    12.0    -      -       +      +
    127A  LEU*     6.1     0.4    -      -       +      -
    178A  LYS*     2.9    31.2    +      -       -      +
    179A  GLY      4.1     0.7    -      -       -      +
    181A  SER*     1.3    80.8    +      -       -      +
    183A  HIS*     1.3    57.3    +      -       -      +
    185A  THR*     3.3     2.3    +      -       -      -
    186A  ILE*     2.9    37.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 183 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    124A  ILE*     5.0     6.7    -      -       +      +
    127A  LEU*     3.8    31.5    -      -       +      +
    179A  GLY      3.1    19.5    +      -       -      +
    180A  MET*     3.8    10.1    -      -       -      +
    182A  ASP*     1.3    77.8    -      -       -      +
    184A  SER*     1.3    61.8    +      -       -      +
    186A  ILE*     3.5     4.9    +      -       +      +
    187A  THR*     3.0    39.0    +      -       -      -
    266A  TRP*     3.3    33.9    -      +       +      -
    316A  ILE*     5.3     9.9    -      -       +      -
    354A  PHE      5.9     1.4    +      -       -      -
    356A  THR*     5.5     1.0    +      -       -      -
    366A  FER      4.9    12.4    +      -       -      -
     24E  MET*     3.7    26.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 184 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    180A  MET      2.9    18.8    +      -       -      -
    181A  SER*     3.5     6.1    -      -       -      -
    183A  HIS*     1.3    76.5    -      -       -      +
    185A  THR*     1.3    54.8    +      -       -      +
    187A  THR*     3.2     1.9    +      -       -      -
    188A  MET*     2.8    39.0    +      -       -      +
    214A  VAL*     3.6    14.0    -      -       -      +
    265A  LYS*     2.7    25.4    +      -       -      +
    266A  TRP*     3.8    12.7    -      -       -      -
   1698A  SAH      3.4    11.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with THR 185 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    118A  ASN*     5.7     1.8    -      -       -      +
    122A  VAL*     4.3    23.9    -      -       +      +
    181A  SER*     2.9    24.2    +      -       -      -
    182A  ASP*     3.6     8.2    -      -       -      -
    184A  SER*     1.3    77.1    -      -       -      +
    186A  ILE*     1.3    65.1    +      -       +      +
    188A  MET*     3.9     4.4    -      -       -      +
    189A  LYS*     3.1    27.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 186 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    114A  TYR*     4.2    10.1    -      -       +      +
    118A  ASN*     4.6     9.0    -      -       -      +
    122A  VAL*     3.4    27.4    -      -       +      +
    123A  SER*     4.8     8.3    -      -       -      +
    124A  ILE*     4.1    25.6    -      -       +      +
    182A  ASP      2.9    22.8    +      -       -      +
    183A  HIS*     3.9     4.0    -      -       +      +
    185A  THR*     1.3    78.7    -      -       +      +
    187A  THR*     1.3    62.6    +      -       -      +
    189A  LYS*     3.8     5.0    +      -       -      +
    190A  LYS*     3.4    19.4    +      -       -      +
    354A  PHE*     3.9    27.4    -      -       +      -
     20E  ASN*     4.7     0.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 187 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    183A  HIS*     3.0    34.2    +      -       -      -
    184A  SER      3.7     2.0    -      -       -      -
    186A  ILE*     1.3    76.3    -      -       -      +
    188A  MET*     1.3    61.0    +      -       -      +
    190A  LYS*     3.2     6.4    +      -       -      +
    191A  ILE*     2.9    47.2    +      -       +      +
    265A  LYS*     4.4     4.9    -      -       -      -
    266A  TRP*     3.7    17.3    -      -       +      -
    353A  ALA      4.5     5.2    -      -       -      +
    354A  PHE*     5.1     9.7    +      -       -      +
    356A  THR*     3.9    24.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with MET 188 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    184A  SER*     2.8    22.5    +      -       -      +
    185A  THR*     3.9     4.7    -      -       -      +
    187A  THR*     1.3    72.2    -      -       -      +
    189A  LYS*     1.3    55.7    +      -       -      +
    191A  ILE*     2.9    13.8    +      -       +      +
    192A  LEU*     2.7    54.2    +      -       +      +
    198A  PHE*     5.1     0.2    -      -       +      -
    214A  VAL*     3.8    29.2    -      -       +      +
    217A  THR*     4.8    13.9    -      -       +      +
    218A  ILE*     4.0    29.6    -      -       +      -
    263A  PHE*     4.0    12.3    -      -       +      -
    265A  LYS*     3.6    31.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 189 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    185A  THR*     3.1    17.0    +      -       +      +
    186A  ILE*     4.0     5.6    -      -       -      +
    188A  MET*     1.3    78.7    -      -       -      +
    190A  LYS*     1.3    63.9    +      -       -      +
    192A  LEU*     3.6     9.3    +      -       -      +
    193A  GLU*     3.3    41.2    +      -       +      +
    217A  THR*     5.7     1.9    -      -       -      +
    221A  LYS*     5.1     2.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 190 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    186A  ILE      3.4    11.2    +      -       -      +
    187A  THR*     3.2     8.6    +      -       -      +
    188A  MET      3.2     0.4    -      -       -      -
    189A  LYS*     1.3    76.4    -      -       +      +
    191A  ILE*     1.3    65.0    -      -       -      +
    193A  GLU*     3.1    25.6    +      -       -      +
    194A  THR*     3.1    45.0    +      -       -      +
    352A  ASN      5.9     0.2    +      -       -      -
    353A  ALA*     3.7    21.4    -      -       +      +
    354A  PHE*     3.7    48.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 191 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    187A  THR*     2.9    34.8    +      -       +      +
    188A  MET*     2.9    28.9    +      -       +      +
    190A  LYS*     1.3    72.6    -      -       -      +
    192A  LEU*     1.3    55.7    +      -       -      +
    193A  GLU      2.8     7.5    +      -       -      -
    194A  THR*     2.9     6.8    +      -       -      -
    195A  TYR*     2.8    42.1    +      -       +      -
    198A  PHE*     4.3    17.0    -      -       +      -
    263A  PHE*     4.8     1.8    -      -       +      -
    265A  LYS*     4.6     1.1    -      -       +      -
    296A  ALA*     4.2    13.2    -      -       +      -
    353A  ALA*     3.7    15.5    -      -       +      -
    356A  THR*     4.5     3.1    -      -       +      -
    358A  ILE*     3.6    35.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 192 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    188A  MET*     2.7    35.6    +      -       +      +
    189A  LYS*     4.0     6.5    -      -       -      +
    191A  ILE*     1.3    72.4    -      -       -      +
    193A  GLU*     1.3    58.1    +      -       -      +
    195A  TYR      4.2     9.7    -      -       -      +
    196A  THR*     5.7     2.4    -      -       -      +
    198A  PHE*     3.8    30.3    -      -       +      -
    217A  THR*     3.4    43.7    -      -       +      +
    218A  ILE*     4.4     9.2    -      -       +      -
    221A  LYS*     3.7    38.0    +      -       +      +
    222A  TYR*     4.3    20.9    +      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 193 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    189A  LYS*     3.3    42.7    +      -       +      +
    190A  LYS*     3.1    33.2    +      -       +      +
    191A  ILE      2.9     0.6    -      -       -      -
    192A  LEU*     1.3    82.8    -      -       -      +
    194A  THR*     1.3    63.8    +      -       +      +
    195A  TYR      5.4     0.4    -      -       -      -
    196A  THR*     5.5     4.7    -      -       -      +
    221A  LYS*     4.6    10.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 194 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    190A  LYS*     3.1    35.7    +      -       -      +
    191A  ILE*     2.9     7.0    +      -       -      -
    193A  GLU*     1.3    82.3    -      -       +      +
    195A  TYR*     1.3    63.3    +      -       -      +
    196A  THR*     3.8     7.2    +      -       -      +
    351A  CYS*     4.0    36.6    +      -       +      +
    352A  ASN      5.0     4.9    -      -       -      +
    353A  ALA*     4.0    13.3    +      -       +      +
    358A  ILE*     5.5     1.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 195 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    191A  ILE*     2.8    29.4    +      -       +      +
    192A  LEU      4.2     6.5    -      -       -      +
    194A  THR*     1.3    74.2    +      -       -      +
    196A  THR*     1.3    61.9    +      -       -      +
    197A  GLY*     3.3    35.1    -      -       -      -
    198A  PHE*     3.4    36.3    -      +       -      -
    222A  TYR*     4.2     4.3    +      -       -      -
    292A  LYS*     4.0     3.6    +      -       -      -
    294A  ILE*     3.7    38.4    -      -       +      +
    350A  HIS*     3.6    39.0    -      +       +      -
    351A  CYS*     5.8     2.5    -      -       +      +
    358A  ILE*     3.7    28.9    -      -       +      -
    360A  GLU*     3.3    17.1    +      -       +      +
----------------------------------------------------------
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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