Contacts of the helix formed by residues 261 - 284 (chain E) in PDB entry 6D6U


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 ALA 261 (chain E).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    253D  PRO*     4.0    32.8    -      -       +      -
    257E  ILE*     4.3     4.7    -      -       +      -
    258E  ASN*     3.5    14.3    +      -       +      +
    259E  LYS      3.2     2.1    -      -       -      +
    260E  ASP*     1.3    73.9    -      -       -      +
    262E  VAL*     1.3    64.4    +      -       -      +
    263E  PRO*     3.7     3.8    -      -       +      -
    264E  ALA*     4.4     7.6    -      -       +      +
    265E  ARG*     3.8    23.6    +      -       -      +
    314E  TYR*     4.0     1.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 262 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    252B  VAL*     5.2    10.5    -      -       +      -
    253B  PRO*     4.3    23.1    -      -       +      -
    259E  LYS      4.7     2.0    -      -       -      +
    260E  ASP*     3.1    14.7    +      -       -      +
    261E  ALA*     1.3    73.4    -      -       -      +
    263E  PRO*     1.3    77.6    -      -       +      +
    264E  ALA      3.4     0.3    +      -       -      -
    265E  ARG      3.8     0.2    +      -       -      -
    266E  THR*     3.4    22.6    +      -       +      +
    314E  TYR*     4.0    10.7    +      -       -      +
    318E  HIS*     4.5    19.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with PRO 263 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    248C  ALA*     4.2    14.8    -      -       +      +
    249C  ALA*     4.1    36.6    -      -       +      +
    252C  ALA*     4.2     9.2    -      -       +      -
    261E  ALA*     3.9     3.1    -      -       +      -
    262E  VAL*     1.3    98.4    -      -       +      +
    264E  ALA*     1.3    58.5    +      -       -      +
    266E  THR*     2.9    21.5    +      -       -      +
    267E  SER*     2.9    22.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 264 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    248C  ALA*     6.1     2.9    -      -       +      -
    252C  ALA*     5.1     4.7    -      -       -      -
    253D  PRO*     4.1    25.6    -      -       +      +
    254D  ALA*     5.1     1.8    -      -       -      +
    257D  VAL*     3.6    28.0    -      -       +      +
    257E  ILE*     5.0     3.1    -      -       +      -
    261E  ALA*     4.4    10.1    -      -       +      -
    262E  VAL      3.3     1.2    -      -       -      -
    263E  PRO*     1.3    84.0    -      -       +      +
    265E  ARG*     1.3    60.5    +      -       +      +
    267E  SER*     3.7     3.9    -      -       -      -
    268E  LEU*     2.9    30.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 265 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    254E  SER*     2.2    59.6    +      -       -      +
    255E  PHE*     3.1    28.1    +      -       -      +
    257E  ILE*     3.0    34.9    +      -       +      -
    258E  ASN      3.8    17.0    -      -       -      -
    259E  LYS*     5.5     3.7    -      -       -      +
    261E  ALA      3.8    10.3    +      -       -      +
    262E  VAL      3.8     1.8    +      -       -      +
    263E  PRO      3.4     0.2    -      -       -      -
    264E  ALA*     1.3    75.4    -      -       -      +
    266E  THR*     1.3    58.3    +      -       -      +
    268E  LEU*     3.3     5.8    +      -       -      +
    269E  GLY*     2.9    25.5    +      -       -      -
    311E  LEU*     4.3     4.3    -      -       -      +
    314E  TYR*     3.1    59.2    -      -       +      +
    317E  LEU*     4.8     8.0    -      -       -      +
    332E  ASP*     4.9     3.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with THR 266 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    252B  VAL*     6.1     1.8    -      -       +      -
    253B  PRO*     3.6    38.1    -      -       +      -
    256B  THR*     4.7     9.0    -      -       +      +
    257B  VAL*     6.3     0.7    -      -       +      -
    262E  VAL*     3.4    16.9    +      -       +      +
    263E  PRO*     2.9    17.7    +      -       -      +
    265E  ARG*     1.3    75.9    -      -       -      +
    267E  SER*     1.3    58.3    +      -       -      +
    269E  GLY*     3.3     0.7    +      -       -      -
    270E  ILE*     2.9    42.7    +      -       -      +
    311E  LEU*     4.3    11.7    -      -       +      +
    314E  TYR*     3.9     8.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 267 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    252C  ALA*     3.1    26.7    +      -       -      +
    253C  LEU*     6.1     0.5    -      -       -      +
    256C  THR*     3.7    19.8    +      -       -      -
    257D  VAL*     4.8     9.2    -      -       -      -
    263E  PRO*     2.9    23.5    +      -       -      +
    264E  ALA*     3.7     4.3    -      -       -      -
    266E  THR*     1.3    77.9    +      -       -      +
    268E  LEU*     1.3    55.3    +      -       -      +
    270E  ILE*     3.4     8.3    +      -       -      +
    271E  THR*     2.7    38.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 268 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    257D  VAL*     4.7    14.5    -      -       +      +
    260D  VAL*     3.7    32.8    -      -       +      -
    261D  THR*     4.9     6.5    -      -       -      +
    264D  LEU*     4.4     6.5    -      -       +      -
    250E  LEU      4.8     2.0    -      -       -      +
    251E  SER      4.3     5.4    -      -       -      +
    253E  VAL*     4.3    11.7    -      -       +      -
    254E  SER*     3.6    39.0    -      -       -      +
    257E  ILE*     4.6     8.3    -      -       +      -
    264E  ALA      2.9    16.5    +      -       -      +
    265E  ARG*     3.7     5.4    -      -       -      +
    267E  SER*     1.3    77.6    -      -       -      +
    269E  GLY*     1.3    62.6    +      -       -      +
    271E  THR*     3.3     3.9    +      -       -      -
    272E  THR*     2.9    41.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 269 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    254E  SER*     6.0     0.6    -      -       -      -
    265E  ARG      2.9    11.9    +      -       -      -
    266E  THR      3.3     0.4    +      -       -      -
    268E  LEU*     1.3    76.8    -      -       -      +
    270E  ILE*     1.3    61.9    +      -       -      +
    272E  THR*     2.7    22.5    +      -       -      -
    273E  VAL*     3.0    15.1    +      -       -      +
    307E  VAL      5.5     1.1    -      -       -      -
    311E  LEU*     3.7    31.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 270 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    256B  THR*     5.3    10.8    -      -       -      -
    260B  VAL*     4.3    33.0    -      -       +      -
    409B  Y01      5.4    13.7    -      -       +      -
    256C  THR*     4.8    15.9    -      -       +      -
    266E  THR*     2.9    29.7    +      -       -      +
    267E  SER*     3.9     6.3    -      -       -      +
    269E  GLY*     1.3    74.2    -      -       -      +
    271E  THR*     1.3    64.1    +      -       -      +
    273E  VAL*     3.3     6.9    +      -       -      +
    274E  LEU*     3.0    41.1    +      -       +      +
    311E  LEU*     4.1    10.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with THR 271 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    255C  ILE*     5.8     0.5    -      -       -      +
    256C  THR*     4.3    17.2    +      -       -      +
    259C  LEU*     3.5    40.2    -      -       +      +
    257D  VAL*     6.1     0.2    -      -       -      +
    261D  THR*     3.8    15.0    +      -       +      +
    264D  LEU*     3.5    19.7    -      -       +      -
    267E  SER*     2.7    24.1    +      -       -      -
    268E  LEU*     3.7     6.7    -      -       -      -
    269E  GLY      3.2     0.2    -      -       -      -
    270E  ILE*     1.3    79.4    -      -       -      +
    272E  THR*     1.3    57.5    +      -       -      +
    274E  LEU*     3.3     5.2    +      -       -      +
    275E  THR*     2.9    30.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with THR 272 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    260D  VAL*     6.0     0.4    -      -       +      -
    264D  LEU*     4.3    21.3    -      -       +      -
    247E  ILE*     4.5     9.9    -      -       +      +
    250E  LEU      5.4     0.7    -      -       -      -
    251E  SER*     4.0    33.7    -      -       -      +
    268E  LEU*     2.9    24.4    +      -       +      +
    269E  GLY*     2.7    24.8    +      -       -      -
    271E  THR*     1.3    75.7    -      -       -      +
    273E  VAL*     1.3    57.3    +      -       -      +
    275E  THR*     3.3     8.1    +      -       -      -
    276E  MET*     2.9    33.6    +      -       -      +
    307E  VAL*     4.3    16.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 273 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    260B  VAL*     4.8    16.4    -      -       +      -
    264B  LEU*     5.2     7.9    -      -       +      -
    269E  GLY      3.0    22.7    +      -       -      +
    270E  ILE*     3.7     6.1    -      -       -      +
    272E  THR*     1.3    76.4    +      -       -      +
    274E  LEU*     1.3    63.0    +      -       +      +
    276E  MET*     3.2     8.3    +      -       -      +
    277E  THR*     2.9    33.8    +      -       -      +
    304E  PHE*     3.8    23.0    -      -       +      -
    307E  VAL*     4.3    17.0    -      -       +      +
    308E  PHE*     4.3    24.9    -      -       +      -
    311E  LEU*     4.5     9.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 274 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    260B  VAL*     6.2     3.6    -      -       +      -
    264B  LEU*     5.5     5.4    -      -       +      -
    256C  THR*     5.6     0.7    -      -       +      -
    259C  LEU*     4.5    12.6    -      -       +      -
    260C  THR*     3.6    36.3    -      -       +      +
    263C  THR*     4.6    10.1    -      -       +      +
    407C  Y01      3.8    31.4    -      -       +      -
    270E  ILE*     3.0    36.0    +      -       +      +
    271E  THR*     3.7     4.7    -      -       -      +
    273E  VAL*     1.3    81.0    -      -       +      +
    275E  THR*     1.3    62.3    +      -       -      +
    277E  THR*     3.2    12.4    +      -       -      +
    278E  THR*     3.0    28.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 275 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    259C  LEU*     4.3     6.6    -      -       -      +
    263C  THR*     5.0     0.9    -      -       -      +
    264D  LEU*     4.1    17.6    -      -       +      +
    267D  THR*     5.2     4.3    -      -       +      -
    268D  THR*     3.7    26.6    -      -       +      +
    271D  ILE*     6.3     1.3    -      -       +      -
    247E  ILE*     4.0    34.5    -      -       +      -
    271E  THR      2.9    17.2    +      -       -      -
    272E  THR*     3.6     8.1    -      -       -      -
    273E  VAL      3.3     0.2    -      -       -      -
    274E  LEU*     1.3    77.6    -      -       -      +
    276E  MET*     1.3    57.7    +      -       -      +
    278E  THR*     2.6    22.4    +      -       -      +
    279E  LEU*     2.9    17.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with MET 276 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    244E  CYS*     3.8    15.5    -      -       -      +
    247E  ILE*     3.5    34.8    -      -       +      -
    248E  VAL*     4.0     0.7    -      -       +      -
    272E  THR      2.9    17.1    +      -       -      +
    273E  VAL      3.2     7.8    +      -       -      +
    275E  THR*     1.3    73.1    -      -       -      +
    277E  THR*     1.3    60.9    +      -       -      +
    279E  LEU*     3.4    11.1    +      -       -      +
    280E  SER*     2.9    31.2    +      -       -      -
    300E  VAL*     4.9     3.4    -      -       -      +
    303E  CYS*     3.5    34.1    -      -       +      -
    304E  PHE*     3.7    24.9    -      -       +      +
    307E  VAL*     3.5    30.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 277 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    264B  LEU*     3.7    34.4    -      -       +      +
    268B  THR*     5.6     4.7    -      -       +      -
    267C  HIS*     6.2     0.7    -      -       -      +
    407C  Y01      4.1    19.7    -      -       +      -
    273E  VAL*     2.9    18.0    +      -       -      +
    274E  LEU*     3.2    14.8    +      -       +      +
    276E  MET*     1.3    75.5    -      -       -      +
    278E  THR*     1.3    61.6    +      -       +      +
    280E  SER*     2.5    24.1    +      -       -      +
    281E  THR*     3.0    25.3    +      -       +      +
    304E  PHE*     4.6     5.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with THR 278 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    263C  THR*     3.6    37.7    -      -       +      +
    266C  THR*     4.2    10.8    -      -       -      +
    267C  HIS*     5.5     5.4    -      -       +      -
    268D  THR*     3.9    15.1    -      -       +      +
    274E  LEU      3.0    11.8    +      -       -      +
    275E  THR*     2.6    26.2    +      -       -      -
    277E  THR*     1.3    78.8    -      -       +      +
    279E  LEU*     1.3    61.8    +      -       -      +
    281E  THR*     3.0     9.6    +      -       -      -
    282E  ILE*     2.9    37.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 279 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    271D  ILE*     3.6    37.7    -      -       +      -
    240E  THR*     5.4    11.9    -      -       +      +
    243E  PRO*     4.2    10.3    -      -       +      +
    244E  CYS*     3.9    44.2    -      -       +      +
    247E  ILE*     5.5     2.5    -      -       +      -
    275E  THR*     2.9    19.6    +      -       +      +
    276E  MET*     3.8    14.1    -      -       +      +
    278E  THR*     1.3    76.5    +      -       -      +
    280E  SER*     1.3    58.2    +      -       -      +
    282E  ILE*     3.4     4.9    +      -       +      +
    283E  ALA*     2.9    36.4    +      -       +      +
    300E  VAL*     4.5    10.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 280 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    276E  MET      2.9    15.4    +      -       -      -
    277E  THR*     2.5    27.2    +      -       -      +
    279E  LEU*     1.3    75.4    -      -       -      +
    281E  THR*     1.3    61.5    +      -       -      +
    283E  ALA*     2.6    24.3    +      -       -      -
    284E  ARG*     2.9    53.0    +      -       -      +
    300E  VAL*     4.6     6.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 281 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    268B  THR*     6.3     2.2    -      -       +      -
    271B  ILE*     5.9     3.6    -      -       +      -
    267C  HIS*     3.9    33.8    +      -       +      +
    270C  GLU*     3.4    16.1    +      -       -      +
    277E  THR*     3.0    23.8    +      -       +      +
    278E  THR*     3.0    17.3    +      -       -      -
    280E  SER*     1.3    83.8    +      -       -      +
    282E  ILE*     1.3    61.8    +      -       -      +
    284E  ARG*     4.5     7.6    +      -       -      +
    285E  LYS*     3.9    17.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 282 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    266C  THR*     5.6     6.5    -      -       -      +
    270C  GLU*     3.1    22.9    -      -       -      +
    268D  THR*     4.9     2.7    -      -       -      +
    271D  ILE*     3.7    36.3    -      -       +      +
    272D  SER*     4.2    23.1    -      -       -      +
    275D  ASN*     3.6    25.8    -      -       +      +
    278E  THR*     2.9    30.4    +      -       -      +
    279E  LEU*     3.8     4.9    -      -       +      +
    281E  THR*     1.3    81.4    -      -       -      +
    283E  ALA*     1.3    63.7    +      -       -      +
    285E  LYS*     3.5    12.9    +      -       -      +
    286E  SER*     3.7    10.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 283 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    240E  THR*     5.5    10.1    -      -       +      -
    279E  LEU*     2.9    23.4    +      -       +      +
    280E  SER*     2.6    13.0    +      -       -      +
    282E  ILE*     1.3    70.3    -      -       -      +
    284E  ARG*     1.3    70.7    +      -       -      +
    285E  LYS      3.1     2.7    +      -       -      -
    286E  SER*     3.4    24.4    +      -       -      -
    296E  MET*     4.7    11.0    -      -       +      +
    297E  ASP*     4.6     8.5    -      -       -      +
    300E  VAL*     4.7    12.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 284 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    267A  HIS*     3.1    48.9    +      -       +      +
    270A  GLU*     5.6     2.0    +      -       -      +
    271A  THR*     5.9     1.3    -      -       +      -
    280E  SER*     2.9    55.6    +      -       -      +
    281E  THR*     4.2     7.2    -      -       -      +
    283E  ALA*     1.3    78.4    -      -       -      +
    285E  LYS*     1.3    62.2    +      -       +      +
    286E  SER      4.6     1.9    -      -       -      -
    297E  ASP*     4.7    13.6    +      -       -      +
    300E  VAL*     3.2    34.1    -      -       -      +
    301E  SER*     4.6     9.1    -      -       -      +
----------------------------------------------------------
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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