Contacts of the helix formed by residues 253 - 282 (chain A) in PDB entry 1MV4


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 ILE 253 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    248A  GLY*     3.2    23.6    +      -       -      +
    249A  CYS*     3.0    37.0    -      -       +      -
    251A  LYS*     4.2     7.2    -      -       +      -
    252A  SER*     1.3    89.8    -      -       -      +
    254A  ASP*     1.3    57.8    +      -       -      +
    255A  ASP      3.3     0.4    -      -       -      -
    256A  LEU*     2.5    39.3    +      -       +      +
    257A  GLU*     2.7    16.4    +      -       +      -
    253B  ILE*     3.1    42.8    -      -       +      -
    256B  LEU*     4.6     2.0    -      -       +      -
    257B  GLU*     4.3    13.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 254 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    248A  GLY*     3.1    33.3    +      -       -      +
    249A  CYS      4.4     2.8    -      -       -      +
    250A  GLY*     5.7     0.2    -      -       -      -
    251A  LYS      4.3    11.8    +      -       -      +
    252A  SER*     4.3     2.1    -      -       -      -
    253A  ILE*     1.3    80.3    +      -       -      +
    255A  ASP*     1.3    65.4    +      -       -      +
    256A  LEU      2.9     0.5    +      -       -      -
    257A  GLU*     3.0     5.0    +      -       -      +
    258A  ASP*     2.9    23.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 255 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    252A  SER*     4.2    11.5    +      -       -      +
    253A  ILE      3.3     0.2    -      -       -      -
    254A  ASP*     1.3    79.3    -      -       -      +
    256A  LEU*     1.3    57.4    +      -       +      +
    258A  ASP*     3.5    10.3    -      -       -      +
    259A  GLU*     2.8    58.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 256 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    252A  SER*     3.6    18.2    -      -       -      +
    253A  ILE*     2.5    30.2    +      -       +      +
    255A  ASP*     1.3    72.2    -      -       +      +
    257A  GLU*     1.3    53.0    +      -       -      +
    258A  ASP      3.1     0.2    +      -       -      -
    259A  GLU*     3.2     4.5    +      -       -      +
    260A  LEU*     2.6    37.2    +      -       -      +
    253B  ILE      4.7     0.2    -      -       -      +
    256B  LEU*     3.6    23.6    -      -       +      -
    257B  GLU*     3.3    55.0    -      -       +      +
    260B  LEU*     3.9    23.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 257 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    248A  GLY*     2.6    27.2    +      -       -      +
    253A  ILE*     2.7    21.3    +      -       +      +
    254A  ASP*     3.7     5.6    -      -       -      +
    256A  LEU*     1.3    72.9    -      -       -      +
    258A  ASP*     1.3    57.6    +      -       -      +
    260A  LEU*     3.4     3.9    -      -       -      +
    261A  TYR*     2.9    43.5    +      -       +      +
    253B  ILE*     4.2     4.9    -      -       -      +
    256B  LEU*     3.5    37.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 258 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    254A  ASP      2.9    16.2    +      -       -      +
    255A  ASP*     3.5    12.0    -      -       -      +
    257A  GLU*     1.3    75.5    -      -       -      +
    259A  GLU*     1.3    81.5    +      -       -      +
    260A  LEU      3.0     1.2    +      -       -      -
    261A  TYR*     3.8     3.5    -      -       -      +
    262A  ALA*     2.9    28.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 259 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    255A  ASP*     2.8    47.3    +      -       -      +
    256A  LEU*     3.8     3.6    -      -       -      +
    258A  ASP*     1.3    85.9    -      -       -      +
    260A  LEU*     1.3    51.8    +      -       -      +
    262A  ALA*     4.1     8.7    -      -       -      +
    263A  GLN*     2.6    56.6    +      -       -      +
    260B  LEU*     4.4     2.2    -      -       +      -
    264B  LYS*     3.3    27.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 260 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    256A  LEU      2.6    22.4    +      -       -      +
    257A  GLU*     3.4    10.1    -      -       -      +
    258A  ASP      3.0     0.8    -      -       -      -
    259A  GLU*     1.3    68.8    -      -       -      +
    261A  TYR*     1.3    65.2    +      -       +      +
    262A  ALA      2.9     1.1    -      -       -      -
    263A  GLN*     2.6    25.5    +      -       -      +
    264A  LYS*     2.9    54.9    +      -       +      +
    256B  LEU*     4.4    22.4    -      -       +      +
    259B  GLU*     4.4     4.9    -      -       +      -
    260B  LEU*     4.1    32.7    -      -       +      +
    263B  GLN*     4.2     9.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 261 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    257A  GLU*     2.9    23.8    +      -       +      +
    258A  ASP*     3.9     3.6    -      -       -      +
    260A  LEU*     1.3    83.2    -      -       +      +
    262A  ALA*     1.3    61.6    +      -       -      +
    264A  LYS*     3.2    13.3    +      -       +      +
    265A  LEU*     3.1    45.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 262 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    258A  ASP*     2.9    21.2    +      -       -      +
    259A  GLU*     3.7    15.3    -      -       -      +
    261A  TYR*     1.3    75.1    -      -       -      +
    263A  GLN*     1.3    57.0    +      -       -      +
    264A  LYS      3.0     1.3    -      -       -      -
    265A  LEU*     3.3     5.1    +      -       -      +
    266A  LYS*     2.6    49.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 263 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    259A  GLU*     2.6    41.1    +      -       -      +
    260A  LEU*     2.6    12.8    +      -       -      +
    262A  ALA*     1.3    75.8    -      -       -      +
    264A  LYS*     1.3    48.0    +      -       -      -
    266A  LYS*     3.6     8.6    -      -       -      +
    267A  TYR*     2.7    37.8    +      -       -      +
    260B  LEU*     3.5     1.0    -      -       -      +
    263B  GLN*     3.7    41.0    -      -       +      +
    264B  LYS*     2.6    38.1    +      -       -      +
    267B  TYR*     4.4    31.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 264 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    260A  LEU*     2.9    52.6    +      -       +      +
    261A  TYR*     3.3    13.9    -      -       +      +
    262A  ALA      3.0     0.2    -      -       -      -
    263A  GLN*     1.3    74.2    -      -       -      +
    265A  LEU*     1.3    63.1    +      -       +      +
    266A  LYS      3.0     1.1    -      -       -      -
    267A  TYR*     2.9    23.8    +      -       -      +
    268A  LYS*     3.0    15.1    +      -       -      +
    259B  GLU*     3.3    30.5    +      -       -      +
    263B  GLN*     3.1    24.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 265 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    261A  TYR*     3.1    38.6    +      -       +      +
    262A  ALA*     4.1     4.0    -      -       -      +
    264A  LYS*     1.3    80.4    -      -       +      +
    266A  LYS*     1.3    51.1    +      -       -      +
    268A  LYS*     4.0    10.0    -      -       -      +
    269A  ALA*     2.8    38.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 266 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    262A  ALA*     2.6    34.1    +      -       -      +
    263A  GLN*     4.0     8.7    -      -       -      +
    265A  LEU*     1.3    73.4    -      -       -      +
    267A  TYR*     1.3    55.7    +      -       -      +
    269A  ALA*     4.0     7.2    -      -       +      -
    270A  ILE*     2.7    47.0    +      -       +      +
    267B  TYR*     4.4    33.7    +      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 267 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    263A  GLN      2.7    21.4    +      -       -      +
    264A  LYS*     3.1    10.8    -      -       -      +
    266A  LYS*     1.3    79.7    -      -       -      +
    268A  LYS*     1.3    70.2    +      -       +      +
    270A  ILE*     3.0    22.7    -      -       -      +
    271A  SER*     3.0    23.0    +      -       -      -
    263B  GLN*     4.6    15.7    -      -       +      -
    266B  LYS*     4.0    38.7    -      -       +      -
    270B  ILE*     4.8     9.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 268 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    264A  LYS      3.0    12.9    +      -       -      +
    265A  LEU*     4.4     9.9    -      -       -      +
    267A  TYR*     1.3    87.0    -      -       +      +
    269A  ALA*     1.3    64.4    +      -       -      +
    270A  ILE      3.2     0.4    -      -       -      -
    271A  SER*     3.9     4.9    -      -       -      -
    272A  GLU*     3.0    52.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 269 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    265A  LEU      2.8    23.7    +      -       -      +
    266A  LYS*     4.0     9.9    -      -       +      +
    268A  LYS*     1.3    82.6    -      -       -      +
    270A  ILE*     1.3    52.0    +      -       -      +
    272A  GLU*     4.3     2.6    -      -       -      +
    273A  GLU*     2.8    41.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 270 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    266A  LYS*     2.7    31.2    +      -       +      +
    267A  TYR*     3.0    16.6    -      -       -      +
    269A  ALA*     1.3    77.9    -      -       -      +
    271A  SER*     1.3    67.8    -      -       -      +
    273A  GLU*     3.6     8.0    -      -       -      +
    274A  LEU*     2.6    38.2    +      -       -      +
    267B  TYR*     5.0    12.8    -      -       +      -
    270B  ILE*     3.6    41.5    -      -       +      -
    271B  SER*     4.4    13.2    -      -       -      +
    274B  LEU*     3.3    26.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 271 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    267A  TYR*     3.0    24.1    +      -       -      -
    268A  LYS*     3.9     7.6    -      -       -      -
    269A  ALA      3.5     0.2    -      -       -      -
    270A  ILE*     1.3    84.3    -      -       -      +
    272A  GLU*     1.3    57.6    +      -       -      +
    274A  LEU*     3.5     5.8    -      -       -      +
    275A  ASP*     3.0    30.1    +      -       -      +
    270B  ILE*     4.5    12.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 272 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    268A  LYS*     3.0    37.8    +      -       +      +
    269A  ALA*     4.3     2.5    -      -       -      +
    271A  SER*     1.3    73.1    -      -       -      +
    273A  GLU*     1.3    55.1    +      -       -      +
    274A  LEU      2.9     4.7    +      -       -      -
    275A  ASP*     3.1     6.1    +      -       +      +
    276A  HIS*     2.7    52.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 273 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    269A  ALA      2.8    25.0    +      -       -      +
    270A  ILE*     3.9     9.4    -      -       -      +
    272A  GLU*     1.3    77.4    -      -       -      +
    274A  LEU*     1.3    49.8    +      -       -      +
    276A  HIS*     4.1     5.5    -      -       -      +
    277A  ALA*     2.6    39.7    +      -       +      +
    274B  LEU*     5.0     4.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 274 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    270A  ILE      2.6    22.3    +      -       -      +
    271A  SER*     3.5     6.1    -      -       -      +
    273A  GLU*     1.3    71.2    -      -       -      +
    275A  ASP*     1.3    71.6    +      -       -      +
    276A  HIS      3.0     0.7    -      -       -      -
    277A  ALA*     2.7    26.2    +      -       +      +
    278A  LEU*     2.9    18.6    +      -       +      +
    270B  ILE*     4.2    19.5    -      -       +      +
    273B  GLU*     4.4     7.2    -      -       +      -
    274B  LEU*     3.3    50.7    -      -       +      +
    277B  ALA*     4.5    14.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 275 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    271A  SER      3.0    13.8    +      -       -      +
    272A  GLU*     3.7     5.8    -      -       +      +
    274A  LEU*     1.3    89.4    -      -       -      +
    276A  HIS*     1.3    56.1    +      -       +      +
    278A  LEU*     3.4     4.7    +      -       -      +
    279A  LYS*     2.7    44.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with HIS 276 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    272A  GLU*     2.7    33.0    +      -       +      +
    273A  GLU*     4.1     5.6    -      -       -      +
    275A  ASP*     1.3    78.2    -      -       +      +
    277A  ALA*     1.3    58.1    +      -       -      +
    278A  LEU      3.1     0.4    -      -       -      -
    279A  LYS*     3.9    12.0    -      -       +      +
    280A  ASP*     2.7    38.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 277 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    273A  GLU*     2.6    28.4    +      -       +      +
    274A  LEU*     2.7    14.0    +      -       +      +
    276A  HIS*     1.3    74.8    -      -       -      +
    278A  LEU*     1.3    54.2    +      -       -      -
    280A  ASP*     4.0     5.3    -      -       -      +
    281A  MET*     3.3    22.5    +      -       -      +
    274B  LEU*     5.4     8.1    -      -       +      -
    278B  LEU*     4.7    23.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 278 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    274A  LEU*     2.9    17.6    +      -       +      +
    275A  ASP*     3.9     4.7    -      -       -      +
    277A  ALA*     1.3    75.0    -      -       -      +
    279A  LYS*     1.3    65.2    +      -       -      +
    280A  ASP      3.0     2.0    -      -       -      -
    281A  MET*     2.7     6.8    +      -       +      +
    282A  THR*     2.5    37.0    +      -       -      +
    277B  ALA*     3.5    43.3    -      -       +      +
    278B  LEU*     5.4     3.4    -      -       +      -
    281B  MET*     3.7    28.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 279 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    275A  ASP*     2.7    29.0    +      -       +      +
    276A  HIS*     3.9    16.8    -      -       +      +
    278A  LEU*     1.3    83.8    -      -       -      +
    280A  ASP*     1.3    60.8    +      -       -      +
    282A  THR*     3.9    16.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 280 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    276A  HIS*     2.7    24.2    +      -       -      +
    277A  ALA*     4.0     5.6    -      -       -      +
    279A  LYS*     1.3    73.1    -      -       -      +
    281A  MET*     1.3    63.1    +      -       -      +
    282A  THR*     4.5     2.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with MET 281 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    277A  ALA      3.3    13.8    +      -       -      +
    278A  LEU*     2.7    10.1    +      -       +      +
    280A  ASP*     1.3    79.7    -      -       -      +
    282A  THR*     1.3    84.0    +      -       -      +
    284A  ILE*     3.1    36.6    -      -       +      +
    278B  LEU*     2.9    37.5    -      -       +      -
    281B  MET*     3.1    27.8    -      -       +      -
    282B  THR      3.1    25.8    -      -       -      +
    283B  SER*     4.7     2.7    -      -       -      -
    284B  ILE      4.6     2.5    -      -       -      +
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Residues in contact with THR 282 (chain A). Click here for Legend to table.
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                                  Specific contacts
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     Residue       Dist    Surf   HB    Arom    Phob    DC
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    278A  LEU*     2.5    19.4    +      -       -      -
    279A  LYS*     3.9    16.2    -      -       -      +
    280A  ASP      4.5     3.1    -      -       -      +
    281A  MET*     1.3   101.5    -      -       -      +
    283A  SER*     1.3    62.9    +      -       -      +
    284A  ILE*     2.5    24.8    +      -       +      +
    281B  MET*     2.7    12.4    -      -       -      +
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


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

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

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