Contacts of the helix formed by residues 282 - 310 (chain B) in PDB entry 1BJW


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 GLN 282 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     83B  ARG*     3.2    49.1    +      -       -      +
     84B  GLU*     5.9     0.4    -      -       -      +
    278B  ALA      5.2     0.2    -      -       -      -
    279B  LEU      3.8    16.8    +      -       -      +
    280B  THR*     3.1     8.8    +      -       -      +
    281B  ASN*     1.3    71.0    -      -       -      +
    283B  GLU*     1.3    59.6    +      -       -      +
    285B  SER*     4.1     5.3    -      -       -      -
    286B  ARG*     2.9    55.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 283 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    281B  ASN*     3.2     8.9    +      -       -      +
    282B  GLN*     1.3    81.4    -      -       -      +
    284B  ALA*     1.3    62.3    +      -       -      +
    286B  ARG*     3.8    16.3    +      -       -      +
    287B  ALA*     3.3    21.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 284 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48B  HIS*     3.6    30.9    +      -       +      -
    281B  ASN*     3.1    29.8    +      -       -      +
    283B  GLU*     1.3    77.7    -      -       -      +
    285B  SER*     1.3    64.6    +      -       -      +
    287B  ALA*     3.4     8.0    +      -       -      +
    288B  PHE*     3.2    19.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 285 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48B  HIS*     2.9    26.0    +      -       -      -
    236B  PHE*     3.8    20.3    -      -       -      -
    278B  ALA*     2.7    30.8    +      -       -      +
    281B  ASN      3.2     9.3    +      -       -      -
    282B  GLN*     4.1     4.5    -      -       -      -
    284B  ALA*     1.3    74.4    -      -       -      +
    286B  ARG*     1.3    60.5    +      -       -      +
    288B  PHE*     3.1     6.2    +      -       -      +
    289B  VAL*     2.9    33.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 286 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    282B  GLN*     2.9    49.9    +      -       -      +
    283B  GLU*     3.8    12.8    +      -       -      +
    285B  SER*     1.3    75.7    -      -       -      +
    287B  ALA*     1.3    58.0    +      -       -      +
    289B  VAL*     3.4     5.9    +      -       -      +
    290B  GLU*     2.9    51.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 287 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    283B  GLU      3.3    11.3    +      -       -      +
    284B  ALA*     3.5    12.3    -      -       -      +
    285B  SER      3.2     0.6    -      -       -      -
    286B  ARG*     1.3    79.5    -      -       -      +
    288B  PHE*     1.3    62.1    +      -       -      +
    290B  GLU*     4.1     3.9    -      -       -      +
    291B  MET*     3.1    23.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 288 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41B  PRO*     5.9     0.9    -      -       +      -
     43B  PHE*     3.9    15.0    -      +       +      -
     44B  ASP      3.7    15.9    -      -       -      -
     46B  PRO*     3.9    31.6    -      -       +      -
    235B  ALA      3.4    27.1    -      -       -      -
    236B  PHE*     3.8    20.2    -      +       +      -
    237B  ALA*     3.9    21.5    -      -       +      -
    284B  ALA      3.2    12.1    +      -       -      +
    285B  SER*     3.1     9.9    +      -       -      +
    287B  ALA*     1.3    75.7    -      -       -      +
    289B  VAL*     1.3    64.0    +      -       -      +
    291B  MET*     3.2    31.5    +      -       +      +
    292B  ALA*     2.9    31.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 289 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    208B  HIS*     3.9    33.0    -      -       +      +
    209B  LEU*     6.0     1.3    -      -       +      -
    235B  ALA*     3.8    20.4    -      -       +      +
    236B  PHE*     3.9    16.4    -      -       +      -
    285B  SER      2.9    18.4    +      -       -      +
    286B  ARG*     3.9     6.1    -      -       -      +
    288B  PHE*     1.3    76.7    -      -       -      +
    290B  GLU*     1.3    71.7    +      -       -      +
    292B  ALA*     3.9     4.5    -      -       -      +
    293B  ARG*     2.9    46.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 290 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    286B  ARG*     2.9    38.5    +      -       +      +
    287B  ALA*     4.2     3.8    -      -       -      +
    289B  VAL*     1.3    83.8    -      -       -      +
    291B  MET*     1.3    62.8    +      -       -      +
    293B  ARG*     2.4    43.5    +      -       -      +
    294B  GLU*     3.0    25.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 291 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     43B  PHE*     4.1    27.1    -      -       +      -
    287B  ALA      3.1    18.4    +      -       -      +
    288B  PHE*     3.5    41.1    -      -       +      +
    290B  GLU*     1.3    77.4    -      -       -      +
    292B  ALA*     1.3    63.5    +      -       -      +
    294B  GLU*     3.6     5.5    +      -       -      +
    295B  ALA*     3.2    22.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 292 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     43B  PHE*     3.9    25.1    -      -       +      -
    209B  LEU*     6.0     3.1    -      -       +      -
    235B  ALA      5.5     1.6    -      -       -      +
    288B  PHE*     2.9    29.2    +      -       +      +
    289B  VAL*     3.9     5.8    -      -       -      +
    291B  MET*     1.3    75.6    -      -       +      +
    293B  ARG*     1.3    58.1    +      -       -      +
    295B  ALA*     3.2     3.3    +      -       -      +
    296B  TYR*     2.9    52.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 293 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    207B  GLU      5.1     1.0    +      -       -      -
    208B  HIS*     3.0    39.7    +      -       -      +
    209B  LEU*     5.6     1.8    -      -       -      +
    210B  LEU*     3.3    30.2    +      -       -      +
    211B  TYR*     3.7    13.7    -      -       +      -
    289B  VAL*     2.9    24.6    +      -       -      +
    290B  GLU*     2.4    46.8    +      -       -      +
    292B  ALA*     1.3    75.0    -      -       -      +
    294B  GLU*     1.3    63.5    +      -       -      +
    296B  TYR*     4.3     7.8    -      -       -      -
    297B  ARG*     3.1    36.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 294 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    290B  GLU      3.0    17.5    +      -       -      +
    291B  MET*     3.9     6.1    -      -       -      +
    292B  ALA      3.3     0.2    -      -       -      -
    293B  ARG*     1.3    77.6    -      -       -      +
    295B  ALA*     1.3    64.6    +      -       -      +
    297B  ARG*     3.5     9.6    +      -       -      +
    298B  ARG*     2.8    62.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 295 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     43B  PHE*     3.7    23.6    -      -       +      -
    291B  MET*     3.2    16.7    +      -       +      +
    292B  ALA      3.5     4.3    -      -       -      +
    294B  GLU*     1.3    81.3    -      -       -      +
    296B  TYR*     1.3    61.6    +      -       -      +
    298B  ARG*     3.3    13.5    +      -       -      +
    299B  ARG*     3.1    37.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 296 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41B  PRO*     3.4    34.3    -      -       -      +
     42B  ASP*     3.9     4.7    -      -       -      -
     43B  PHE*     3.7    19.7    -      +       -      -
    209B  LEU*     4.0    28.3    -      -       +      -
    211B  TYR*     3.1    30.1    -      +       +      +
    234B  LLP      4.9     1.1    +      -       -      -
    292B  ALA*     2.9    35.2    +      -       +      +
    293B  ARG*     4.3     3.8    -      -       -      -
    295B  ALA*     1.3    72.7    -      -       -      +
    297B  ARG*     1.3    55.7    +      -       -      +
    299B  ARG*     3.3    31.0    +      -       -      +
    300B  ARG*     2.8    30.8    +      -       -      +
    321B  PHE*     4.1    19.8    -      +       +      -
    364B  TYR*     3.2    20.3    -      -       +      -
    365B  ALA*     4.4     4.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 297 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    210B  LEU      4.3     4.2    +      -       -      -
    211B  TYR*     3.0    56.8    +      -       +      +
    212B  GLU*     3.9     7.7    +      -       -      -
    293B  ARG*     3.1    28.9    +      -       -      +
    294B  GLU*     3.8     9.2    -      -       -      +
    296B  TYR*     1.3    77.0    -      -       -      +
    298B  ARG*     1.3    64.0    +      -       -      +
    300B  ARG*     3.3    23.8    +      -       -      +
    301B  ASP*     3.0    38.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 298 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    294B  GLU*     2.8    51.0    +      -       +      +
    295B  ALA*     3.3    10.7    +      -       -      +
    297B  ARG*     1.3    78.0    -      -       +      +
    299B  ARG*     1.3    57.4    +      -       -      +
    301B  ASP*     3.3     7.1    +      -       -      +
    302B  LEU*     3.0    28.1    +      -       -      +
    368B  GLU*     3.8    17.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 299 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     42B  ASP*     2.8    41.8    +      -       -      -
     43B  PHE*     4.1    18.5    -      -       -      -
    295B  ALA*     3.1    25.4    +      -       -      +
    296B  TYR*     3.5    24.8    -      -       -      +
    297B  ARG      3.2     0.2    -      -       -      -
    298B  ARG*     1.3    75.1    -      -       -      +
    300B  ARG*     1.3    65.9    +      -       -      +
    302B  LEU*     3.4     5.4    +      -       -      +
    303B  LEU*     3.0    24.6    +      -       -      +
    364B  TYR*     3.2    21.3    +      -       +      -
    366B  THR      2.9    25.8    +      -       -      +
    367B  SER*     4.4     7.9    -      -       -      +
    368B  GLU*     4.5    17.5    -      -       +      +
    371B  LEU*     3.6    24.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 300 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    211B  TYR*     3.7    18.6    -      -       +      +
    212B  GLU*     2.7    33.1    +      -       -      -
    296B  TYR      2.8    20.9    +      -       -      +
    297B  ARG*     3.6    23.3    +      -       -      +
    299B  ARG*     1.3    73.0    -      -       -      +
    301B  ASP*     1.3    81.6    +      -       -      +
    303B  LEU*     3.3     2.7    +      -       -      +
    304B  LEU*     2.9    41.3    +      -       +      +
    316B  ARG*     3.2    24.7    -      -       -      +
    317B  PRO*     2.9    36.5    +      -       +      -
    323B  VAL*     5.1     0.7    -      -       +      -
    364B  TYR*     3.5    36.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 301 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    297B  ARG*     3.0    31.6    +      -       -      +
    298B  ARG*     3.7     6.7    -      -       -      +
    300B  ARG*     1.3   104.1    +      -       -      +
    302B  LEU*     1.3    63.1    +      -       -      +
    304B  LEU*     3.4     6.8    +      -       -      +
    305B  GLU*     3.0    39.1    +      -       -      +
    316B  ARG*     4.8     3.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 302 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    298B  ARG      3.0    14.8    +      -       -      +
    299B  ARG*     3.6     3.8    -      -       -      +
    301B  ASP*     1.3    76.9    -      -       -      +
    303B  LEU*     1.3    65.8    +      -       -      +
    305B  GLU*     3.6    10.7    -      -       -      +
    306B  GLY*     3.2    18.9    +      -       -      -
    368B  GLU*     3.8    46.9    -      -       +      +
    371B  LEU*     3.9    24.9    -      -       +      -
    372B  ARG*     4.1    23.8    -      -       +      +
    375B  LEU*     4.1    16.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 303 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     36B  LEU*     5.7     3.1    -      -       +      -
    299B  ARG      3.0    17.1    +      -       -      +
    300B  ARG*     3.6     4.0    -      -       -      +
    302B  LEU*     1.3    82.7    -      -       +      +
    304B  LEU*     1.3    63.7    +      -       +      +
    306B  GLY*     3.2     2.8    +      -       -      -
    307B  LEU*     3.0    44.7    +      -       +      +
    323B  VAL*     4.0    27.6    -      -       +      -
    362B  LEU*     4.0    27.6    -      -       +      -
    363B  SER      5.6     0.2    -      -       -      -
    364B  TYR*     4.3    17.5    -      -       +      +
    371B  LEU*     4.4    18.8    -      -       +      +
    375B  LEU*     4.2    14.1    -      -       +      +
    378B  PHE*     5.4     1.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 304 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    300B  ARG*     2.9    36.7    +      -       +      +
    301B  ASP*     4.0     6.1    -      -       -      +
    303B  LEU*     1.3    69.7    -      -       +      +
    305B  GLU*     1.3    64.2    +      -       -      +
    307B  LEU*     3.4     7.4    +      -       +      +
    308B  THR*     2.9    32.0    +      -       -      +
    314B  ALA*     4.4    13.7    -      -       +      +
    316B  ARG*     3.5    39.9    -      -       +      +
    317B  PRO*     3.9    22.2    -      -       +      -
    323B  VAL*     4.2    22.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 305 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    301B  ASP*     3.0    32.4    +      -       -      +
    302B  LEU*     3.6     8.3    -      -       -      +
    304B  LEU*     1.3    76.0    -      -       -      +
    306B  GLY*     1.3    64.1    +      -       -      +
    308B  THR*     3.4     6.5    +      -       -      -
    309B  ALA*     3.0    22.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 306 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    302B  LEU      3.2     7.5    +      -       -      -
    303B  LEU      3.2     3.6    +      -       -      -
    305B  GLU*     1.3    77.6    -      -       -      +
    307B  LEU*     1.3    64.2    +      -       -      +
    309B  ALA*     3.2     9.7    +      -       -      +
    310B  LEU*     3.2    24.9    +      -       -      +
    375B  LEU*     3.8    26.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 307 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    303B  LEU*     3.0    40.5    +      -       +      +
    304B  LEU*     3.8    10.3    -      -       +      +
    306B  GLY*     1.3    74.2    -      -       -      +
    308B  THR*     1.3    59.2    +      -       -      +
    310B  LEU*     3.0    19.5    +      -       -      +
    311B  GLY      3.0     9.2    +      -       -      -
    312B  LEU*     3.1    33.7    +      -       +      +
    314B  ALA*     3.8    28.5    -      -       +      -
    323B  VAL*     4.3    11.7    -      -       +      -
    325B  MET*     3.9    31.2    -      -       +      -
    362B  LEU*     4.6     2.7    -      -       +      -
    375B  LEU*     4.0    11.0    -      -       +      +
    378B  PHE*     4.2     6.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 308 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    304B  LEU*     2.9    21.4    +      -       -      +
    305B  GLU*     3.6     6.9    -      -       -      -
    307B  LEU*     1.3    78.2    -      -       -      +
    309B  ALA*     1.3    57.5    +      -       -      +
    311B  GLY*     3.0    17.4    +      -       -      -
    312B  LEU      4.3     7.2    +      -       -      -
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Residues in contact with ALA 309 (chain B). Click here for Legend to table.
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                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
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    305B  GLU      3.0    13.8    +      -       -      +
    306B  GLY*     3.4    13.0    -      -       -      +
    308B  THR*     1.3    76.6    -      -       -      +
    310B  LEU*     1.3    64.0    +      -       +      +
    311B  GLY      3.5     0.2    +      -       -      -
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Residues in contact with LEU 310 (chain B). Click here for Legend to table.
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                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
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    306B  GLY      3.2    13.6    +      -       -      +
    307B  LEU      3.0     9.4    +      -       -      +
    309B  ALA*     1.3    81.6    -      -       +      +
    311B  GLY*     1.3    58.0    +      -       -      +
    312B  LEU*     3.2    14.0    +      -       +      -
    375B  LEU*     3.9    30.1    -      -       +      +
    378B  PHE*     3.9    17.7    -      -       +      -
    379B  ALA*     4.0    25.1    -      -       +      +
    382B  LEU*     3.7    28.0    -      -       +      +
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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