Contacts of the helix formed by residues 174 - 199 (chain A) in PDB entry 5DQZ


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 174 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    159A  THR      4.5     5.9    -      -       -      +
    160A  TRP*     5.3     0.3    -      -       -      -
    161A  ASN*     5.0    12.5    +      -       -      +
    162A  GLY      5.0     0.7    -      -       -      +
    173A  GLY*     1.3    77.3    -      -       -      +
    175A  THR*     1.3    64.7    +      -       -      +
    176A  ILE*     3.4    17.6    -      -       +      +
    177A  ASN*     2.3    42.2    +      -       -      +
    178A  GLN*     3.2    18.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 175 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    174A  ASP*     1.3    75.3    -      -       -      +
    176A  ILE*     1.3    58.2    +      -       -      +
    178A  GLN*     3.1    12.9    +      -       -      +
    179A  CYS*     2.9    32.2    +      -       -      -
    236A  ALA*     4.7    16.2    -      -       -      +
    239A  ASN*     5.0    14.3    +      -       -      +
    240A  PRO*     5.4     3.8    -      -       +      +
    243A  PRO*     3.9    27.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 176 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    158A  VAL*     4.0    12.6    -      -       +      -
    159A  THR      4.2    10.8    -      -       -      +
    160A  TRP*     3.8    31.6    -      -       +      -
    174A  ASP*     3.2    29.2    -      -       +      +
    175A  THR*     1.3    78.7    -      -       -      +
    177A  ASN*     1.3    56.4    +      -       -      +
    179A  CYS*     3.3     1.1    +      -       -      +
    180A  ILE*     2.9    34.6    +      -       +      +
    232A  ALA      3.9     3.8    -      -       -      +
    233A  PHE*     3.7    41.7    -      -       +      +
    236A  ALA*     3.6    26.4    -      -       +      +
----------------------------------------------------------
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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
----------------------------------------------------------
    160A  TRP*     4.2     5.5    -      -       -      -
    162A  GLY      3.7    14.3    +      -       -      -
    163A  ARG*     2.9    32.8    +      -       -      +
    164A  ARG*     2.9    41.1    +      -       -      +
    165A  TYR*     5.0     2.0    -      -       +      -
    173A  GLY*     4.8     2.2    -      -       -      -
    174A  ASP*     2.3    50.3    +      -       -      +
    176A  ILE*     1.3    74.7    -      -       -      +
    178A  GLN*     1.3    61.0    +      -       -      +
    180A  ILE*     3.5     2.0    +      -       -      -
    181A  SER*     2.9    34.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 178 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    170A  TRP*     3.5    52.8    +      -       +      +
    171A  GLU*     3.5    28.7    +      -       -      +
    173A  GLY*     4.2    13.5    +      -       -      +
    174A  ASP      3.2    11.1    +      -       -      +
    175A  THR*     3.1    12.8    +      -       -      +
    177A  ASN*     1.3    77.9    -      -       -      +
    179A  CYS*     1.3    58.5    +      -       -      +
    181A  SER*     3.2     4.1    +      -       -      -
    182A  ALA*     2.9    30.7    +      -       -      +
    243A  PRO*     3.9    19.9    -      -       +      +
    244A  ASP*     4.8     9.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with CYS 179 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    175A  THR*     2.9    26.4    +      -       -      -
    176A  ILE      3.5     7.6    -      -       -      +
    177A  ASN      3.3     0.2    -      -       -      -
    178A  GLN*     1.3    76.7    -      -       -      +
    180A  ILE*     1.3    62.5    +      -       -      +
    182A  ALA*     3.3     2.7    +      -       -      +
    183A  ALA*     2.9    25.5    +      -       -      +
    232A  ALA*     3.5    28.5    -      -       +      +
    235A  ILE*     4.5     0.9    -      -       -      -
    236A  ALA*     4.2    10.8    -      -       -      -
    243A  PRO*     3.7    26.2    -      -       -      -
    244A  ASP*     5.3     1.3    -      -       -      +
    247A  VAL*     3.6    25.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 180 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    149A  TYR*     4.0    23.6    -      -       +      +
    160A  TRP*     3.7    36.1    -      -       +      -
    163A  ARG*     3.7    26.2    -      -       -      +
    176A  ILE*     2.9    34.0    +      -       +      +
    177A  ASN*     3.7     5.4    -      -       -      +
    179A  CYS*     1.3    75.8    -      -       -      +
    181A  SER*     1.3    57.7    +      -       -      +
    183A  ALA*     3.6     2.1    -      -       -      +
    184A  THR*     2.9    46.7    +      -       +      +
    229A  VAL*     4.6     8.7    -      -       +      -
    232A  ALA*     3.8    12.5    -      -       +      +
    233A  PHE*     4.2    10.3    -      -       +      -
     34G    C      5.1     0.4    -      -       -      +
----------------------------------------------------------
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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
----------------------------------------------------------
    163A  ARG*     2.9    24.9    +      -       -      +
    165A  TYR*     4.7     0.3    -      -       -      +
    170A  TRP*     3.4    21.8    -      -       -      -
    177A  ASN      2.9    18.3    +      -       -      -
    178A  GLN*     3.6     1.6    -      -       -      -
    180A  ILE*     1.3    78.1    -      -       -      +
    182A  ALA*     1.3    56.3    +      -       -      +
    184A  THR*     2.9    20.2    +      -       -      -
    185A  SER*     2.9    17.0    +      -       -      -
     33G    T      3.1    33.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 182 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     84A  ARG*     5.2     0.2    +      -       -      -
    170A  TRP*     3.9     1.5    -      -       +      -
    178A  GLN      2.9    16.5    +      -       -      +
    179A  CYS      3.8     3.4    -      -       -      +
    181A  SER*     1.3    73.6    -      -       -      +
    183A  ALA*     1.3    65.7    +      -       -      +
    185A  SER*     3.1     4.0    -      -       -      -
    186A  CYS*     3.0    29.2    +      -       -      -
    244A  ASP*     3.9    34.1    -      -       +      +
    247A  VAL*     4.2     5.8    -      -       +      -
    248A  ARG*     5.1     2.0    -      -       +      +
     32G    T      3.8    22.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 183 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    179A  CYS      2.9    16.9    +      -       -      +
    180A  ILE*     3.6     3.8    -      -       -      +
    182A  ALA*     1.3    77.0    -      -       -      +
    184A  THR*     1.3    63.8    +      -       +      +
    186A  CYS*     3.1     6.1    +      -       -      +
    187A  LEU*     2.9    21.5    +      -       -      +
    228A  VAL*     3.7    30.1    -      -       +      +
    229A  VAL*     4.8     1.6    -      -       -      +
    232A  ALA*     4.1     4.7    -      -       +      -
    247A  VAL*     3.6    17.7    -      -       +      +
    251A  CYS*     3.9    14.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with THR 184 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    149A  TYR*     6.0     0.7    -      -       -      +
    180A  ILE*     2.9    29.8    +      -       +      +
    181A  SER*     2.9    22.9    +      -       -      -
    183A  ALA*     1.3    74.8    -      -       -      +
    185A  SER*     1.3    56.2    +      -       -      +
    187A  LEU*     3.3     9.4    +      -       -      +
    188A  TYR*     2.9    44.5    +      -       -      -
    224A  LYS*     3.8    28.7    -      -       +      -
    228A  VAL*     5.2     0.4    -      -       +      -
    229A  VAL*     4.6     6.7    -      -       +      -
     33G    T      3.6     1.7    -      -       -      -
     34G    C      2.9    29.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 185 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     83A  VAL      3.8     0.3    -      -       -      +
     84A  ARG*     2.8    37.9    +      -       -      -
    181A  SER      2.9    15.4    +      -       -      -
    182A  ALA*     3.1    13.7    -      -       -      -
    184A  THR*     1.3    76.5    +      -       -      +
    186A  CYS*     1.3    63.6    +      -       -      +
    188A  TYR*     3.1     6.3    +      -       -      +
    189A  GLY      3.0    16.5    +      -       -      -
     32G    T      3.3    25.2    +      -       -      -
     33G    T      4.1    12.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with CYS 186 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     83A  VAL*     3.5    34.1    -      -       +      +
     84A  ARG*     3.9     6.5    -      -       -      -
    182A  ALA*     3.0    20.3    +      -       -      -
    183A  ALA      3.1     6.5    +      -       -      +
    185A  SER*     1.3    75.1    -      -       -      +
    187A  LEU*     1.3    58.1    +      -       -      +
    189A  GLY*     2.9    16.3    +      -       -      -
    190A  VAL      3.0    11.8    +      -       -      -
    248A  ARG*     3.5    43.3    -      -       -      -
    251A  CYS*     3.8    15.9    -      -       +      -
    255A  PHE*     3.7     5.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 187 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    183A  ALA      2.9    12.6    +      -       -      +
    184A  THR*     3.5    11.9    -      -       -      +
    186A  CYS*     1.3    75.5    -      -       -      +
    188A  TYR*     1.3    56.0    +      -       +      +
    190A  VAL*     3.3    15.2    -      -       +      +
    191A  THR*     2.6    49.0    +      -       -      +
    220A  ALA*     3.7    19.3    -      -       +      +
    223A  ILE*     3.9    22.0    -      -       +      +
    224A  LYS*     3.6    39.7    -      -       +      -
    228A  VAL*     4.1    19.5    -      -       +      -
    255A  PHE*     4.0    12.2    -      -       +      -
    260A  THR*     5.2     0.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 188 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    184A  THR*     2.9    28.5    +      -       -      -
    185A  SER      3.3     6.5    -      -       -      +
    187A  LEU*     1.3    75.4    -      -       +      +
    189A  GLY*     1.3    66.3    +      -       -      +
    192A  GLU*     3.0    27.5    +      -       -      +
    213A  LEU*     5.4     7.4    -      -       +      +
    216A  VAL*     3.5    14.0    -      -       +      +
    217A  TYR*     3.6    39.1    -      +       +      -
    220A  ALA*     3.7    26.9    -      -       +      -
    221A  ASP*     4.1    13.6    +      -       -      -
    224A  LYS*     4.3     8.5    +      -       +      -
     33G    T      3.4    28.5    -      -       -      +
     34G    C      2.8    44.2    +      +       -      +
----------------------------------------------------------
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Residues in contact with GLY 189 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     82A  GLY      3.0     9.6    -      -       -      +
     83A  VAL      3.4    17.5    -      -       -      -
     84A  ARG*     4.1     7.9    -      -       -      -
     85A  VAL*     3.5    11.1    -      -       -      +
    185A  SER      3.0     7.5    +      -       -      -
    186A  CYS      2.9     9.7    +      -       -      -
    188A  TYR*     1.3    78.9    -      -       -      +
    190A  VAL*     1.3    61.7    +      -       -      -
    192A  GLU*     3.2     2.8    +      -       -      +
    193A  ALA      3.0    17.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 190 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     81A  ALA      3.3    27.1    -      -       -      +
     82A  GLY*     2.9    13.6    +      -       -      +
    186A  CYS      3.0     3.6    +      -       -      -
    187A  LEU*     3.3    18.8    -      -       +      +
    189A  GLY*     1.3    73.5    -      -       -      +
    191A  THR*     1.3    60.2    +      -       -      +
    193A  ALA*     3.2     7.3    +      -       -      +
    194A  ALA*     2.9    28.1    +      -       -      +
    255A  PHE*     3.3    48.9    -      -       +      -
    260A  THR*     4.4     3.4    -      -       +      -
    261A  LEU*     4.0    15.8    -      -       +      +
    264A  LEU*     4.0    12.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with THR 191 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    187A  LEU*     2.6    29.9    +      -       -      +
    190A  VAL*     1.3    73.8    -      -       -      +
    192A  GLU*     1.3    61.4    +      -       -      +
    194A  ALA*     3.3     2.6    +      -       -      +
    195A  ILE*     2.9    31.2    +      -       +      +
    216A  VAL*     3.6    33.7    -      -       +      +
    219A  ILE*     3.8    28.9    -      -       +      -
    220A  ALA*     3.8    12.6    -      -       -      +
    264A  LEU*     3.8    19.2    -      -       +      +
    268A  ILE*     5.5     0.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 192 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     85A  VAL*     3.7    24.1    +      -       +      +
    188A  TYR      3.0    19.1    +      -       -      +
    189A  GLY*     3.5     5.2    -      -       -      +
    191A  THR*     1.3    77.0    -      -       -      +
    193A  ALA*     1.3    61.5    +      -       -      +
    195A  ILE*     3.3     3.0    +      -       -      +
    196A  LEU*     2.9    34.2    +      -       +      +
    202A  PRO*     4.2     9.4    -      -       +      -
    213A  LEU*     3.5    29.5    -      -       +      +
    216A  VAL*     4.0    16.5    -      -       +      +
     91B  PRO*     3.3    12.5    -      -       -      +
    303B  ARG*     3.0    34.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 193 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     53A  MET*     4.3    15.3    -      -       +      +
     76A  VAL*     5.5     2.4    -      -       +      +
     78A  VAL*     5.0     3.6    -      -       +      -
     82A  GLY*     4.8     4.0    -      -       -      +
     85A  VAL*     3.7    15.2    -      -       +      +
    189A  GLY      3.0    12.9    +      -       -      +
    190A  VAL*     3.3    12.3    -      -       -      +
    192A  GLU*     1.3    76.7    -      -       -      +
    194A  ALA*     1.3    57.0    +      -       -      +
    196A  LEU*     3.3     8.2    +      -       -      +
    197A  ALA*     2.9    28.1    +      -       -      +
    261A  LEU*     3.8    23.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 194 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    190A  VAL      2.9    15.4    +      -       -      +
    191A  THR      3.6     4.7    -      -       -      +
    193A  ALA*     1.3    76.7    -      -       -      +
    195A  ILE*     1.3    58.7    +      -       -      +
    197A  ALA*     3.1     4.9    +      -       -      +
    198A  ALA*     2.9    29.5    +      -       -      +
    261A  LEU*     3.7    21.0    -      -       +      +
    264A  LEU*     3.6    31.2    -      -       +      -
    265A  ILE*     4.0     6.9    -      -       +      +
    268A  ILE*     4.0     9.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 195 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    191A  THR*     2.9    18.9    +      -       +      +
    192A  GLU*     3.3     5.1    +      -       -      +
    194A  ALA*     1.3    74.8    -      -       -      +
    196A  LEU*     1.3    63.0    +      -       -      +
    198A  ALA*     3.3     5.1    +      -       -      +
    199A  GLY      3.1     5.0    +      -       -      -
    200A  TYR*     3.1    48.8    +      -       +      +
    202A  PRO*     4.1    16.4    -      -       +      -
    215A  PHE*     3.5    31.0    -      -       +      +
    216A  VAL*     3.7    37.7    -      -       +      +
    219A  ILE*     4.3     4.9    -      -       +      -
    268A  ILE*     3.8    20.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 196 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     74A  LEU*     3.6    19.9    -      -       +      +
     76A  VAL*     4.5     9.9    -      -       +      -
     85A  VAL*     3.9    21.3    -      -       +      -
     88A  SER*     4.2    17.5    -      -       -      +
    192A  GLU*     2.9    23.2    +      -       +      +
    193A  ALA*     3.6     5.4    -      -       -      +
    195A  ILE*     1.3    75.7    -      -       -      +
    197A  ALA*     1.3    61.5    +      -       -      +
    199A  GLY*     3.1    13.9    +      -       -      +
    200A  TYR      4.1    10.3    -      -       -      +
    202A  PRO*     4.0    18.8    -      -       +      -
     91B  PRO*     3.7    43.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 197 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     17A  MET*     3.7    29.6    -      -       +      -
     51A  CYS*     4.5     5.8    -      -       +      -
     53A  MET*     4.5     5.6    -      -       +      -
     74A  LEU*     4.2    12.1    -      -       -      +
     76A  VAL*     5.9     0.2    -      -       -      +
    193A  ALA      2.9    17.4    +      -       -      +
    194A  ALA*     3.1     6.3    +      -       -      +
    196A  LEU*     1.3    77.0    -      -       -      +
    198A  ALA*     1.3    62.2    +      -       -      +
    199A  GLY*     3.4     1.0    +      -       -      -
    265A  ILE*     4.0    10.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 198 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     95A  ARG*     5.9     0.2    -      -       -      -
     98A  LYS*     2.8    33.0    +      -       -      +
    194A  ALA      2.9    16.1    +      -       -      +
    195A  ILE*     3.6     4.3    -      -       -      +
    196A  LEU      3.2     0.2    -      -       -      -
    197A  ALA*     1.3    77.7    -      -       -      +
    199A  GLY*     1.3    59.7    +      -       -      +
    200A  TYR*     3.5    26.2    -      -       +      -
    265A  ILE*     4.4    18.1    -      -       +      +
    268A  ILE*     4.8     8.1    -      -       +      -
    269A  GLU*     4.1     7.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 199 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     93A  GLY*     5.3     8.2    -      -       -      -
     94A  ALA      6.1     1.8    -      -       -      -
     95A  ARG*     4.7     7.4    +      -       -      +
     98A  LYS*     3.3    24.5    -      -       -      +
     99A  LEU*     3.7    13.3    -      -       -      +
    195A  ILE      3.1     0.4    +      -       -      -
    196A  LEU      3.1    15.1    +      -       -      -
    197A  ALA      3.2     1.3    -      -       -      -
    198A  ALA*     1.3    79.6    -      -       -      +
    200A  TYR*     1.3    63.1    +      -       -      +
----------------------------------------------------------
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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