Contacts of the helix formed by residues 276 - 302 (chain D) in PDB entry 1FM6


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 GLU 276 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    274D  SER      3.9     3.6    +      -       -      -
    275D  LYS*     1.3    81.4    -      -       -      +
    277D  VAL*     1.3    70.1    +      -       +      +
    278D  ALA*     3.7    14.1    -      -       +      +
    279D  ILE*     3.1    24.6    +      -       +      +
    280D  ARG*     3.2     8.1    +      -       -      +
    357D  ARG*     2.6    55.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 277 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    252D  MET*     3.5    34.5    -      -       +      -
    255D  LEU*     3.8    20.4    -      -       +      -
    276D  GLU*     1.3    75.6    -      -       +      +
    278D  ALA*     1.3    65.8    +      -       -      +
    280D  ARG*     3.0    38.7    +      -       -      +
    281D  ILE*     3.1    25.5    +      -       +      +
    352D  PHE*     4.0    13.2    -      -       +      -
    356D  LEU*     4.1     8.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 278 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    276D  GLU*     3.4    21.5    -      -       -      +
    277D  VAL*     1.3    82.6    -      -       -      +
    279D  ILE*     1.3    58.3    +      -       -      +
    281D  ILE*     3.5     3.5    +      -       -      +
    282D  PHE*     3.1    27.1    +      -       -      +
    356D  LEU*     4.4    19.8    -      -       +      +
    357D  ARG*     4.2     9.4    -      -       +      +
    360D  PHE*     3.6    34.6    -      -       +      -
    363D  PHE*     6.2     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 279 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    275D  LYS*     4.7    17.7    -      -       +      +
    276D  GLU*     3.1    26.5    +      -       +      +
    278D  ALA*     1.3    75.1    -      -       -      +
    280D  ARG*     1.3    59.7    +      -       -      +
    282D  PHE*     3.7    10.8    -      -       +      +
    283D  GLN*     2.9    54.7    +      -       +      +
    357D  ARG*     4.5     0.2    -      -       -      +
    360D  PHE*     4.2    20.0    -      -       +      -
    460D  GLU*     3.8    24.5    -      -       +      +
    462D  ASP*     5.3    11.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 280 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    252D  MET*     5.3     4.2    +      -       -      +
    255D  LEU*     4.5     9.1    -      -       +      +
    256D  MET*     4.6    11.9    -      -       -      +
    259D  GLU*     2.9    42.5    +      -       -      +
    271D  GLN*     2.7    39.2    -      -       -      +
    273D  GLN*     3.0    44.8    +      -       -      +
    274D  SER      4.6     1.0    -      -       -      +
    275D  LYS      2.7    33.0    +      -       -      +
    276D  GLU*     3.2     6.2    +      -       -      +
    277D  VAL*     3.0    35.1    +      -       -      +
    279D  ILE*     1.3    75.7    -      -       -      +
    281D  ILE*     1.3    61.0    +      -       +      +
    283D  GLN      3.5     0.9    +      -       -      -
    284D  GLY*     3.0    23.9    +      -       -      -
    503D  BRL      5.0     0.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 281 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    255D  LEU*     3.9    14.8    -      -       +      -
    277D  VAL*     3.1    15.4    +      -       +      +
    278D  ALA      3.7     5.8    -      -       -      +
    280D  ARG*     1.3    74.5    -      -       -      +
    282D  PHE*     1.3    65.2    +      -       -      +
    284D  GLY*     2.9    10.7    +      -       -      -
    285D  CYS*     2.9    14.6    +      -       -      -
    348D  MET*     4.2     9.9    -      -       +      -
    352D  PHE*     3.7    31.2    -      -       +      -
    353D  LEU*     3.8    19.7    -      -       +      -
    356D  LEU*     3.9    28.3    -      -       +      -
    363D  PHE*     4.2    11.0    -      -       +      -
    503D  BRL      3.7    26.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 282 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    278D  ALA      3.1    15.9    +      -       -      +
    279D  ILE*     3.7    11.7    -      -       +      +
    281D  ILE*     1.3    80.1    -      -       -      +
    283D  GLN*     1.3    66.3    +      -       +      +
    285D  CYS*     3.3     7.7    +      -       -      +
    286D  GLN*     2.8    48.0    +      -       -      +
    360D  PHE*     3.6    33.9    -      +       +      -
    363D  PHE*     4.9    13.9    -      +       +      -
    449D  HIS*     5.8     1.1    -      +       -      -
    453D  LEU*     4.2    10.5    -      -       +      -
    456D  ILE*     4.4     8.5    -      -       +      -
    463D  MET*     3.4    38.4    -      -       +      -
    503D  BRL      3.4    26.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 283 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    270D  LEU*     4.2     4.1    -      -       -      +
    271D  GLN*     2.7    41.1    -      -       +      +
    275D  LYS*     3.9    20.9    +      -       -      +
    279D  ILE*     2.9    42.6    +      -       +      +
    280D  ARG      3.8     4.0    -      -       -      +
    282D  PHE*     1.3    83.7    -      -       +      +
    284D  GLY*     1.3    60.8    +      -       -      +
    286D  GLN*     3.5    16.3    -      -       -      +
    287D  PHE*     3.1    39.8    +      -       +      -
    463D  MET      5.3     6.2    +      -       -      +
    464D  SER      5.6     4.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 284 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    270D  LEU*     5.1     7.6    -      -       -      -
    280D  ARG      3.0    10.6    +      -       -      -
    281D  ILE      2.9     8.6    +      -       -      -
    283D  GLN*     1.3    75.9    -      -       -      +
    285D  CYS*     1.3    64.7    +      -       -      +
    287D  PHE*     3.2     6.1    +      -       -      +
    288D  ARG*     3.0    23.6    +      -       -      +
    503D  BRL      3.7    23.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with CYS 285 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    281D  ILE      2.9    17.9    +      -       -      -
    282D  PHE      3.3     7.4    +      -       -      +
    284D  GLY*     1.3    74.6    -      -       -      +
    286D  GLN*     1.3    57.5    +      -       -      +
    288D  ARG*     3.2     3.6    +      -       -      +
    289D  SER*     2.9    30.3    +      -       -      -
    363D  PHE*     3.6    27.4    -      -       +      -
    503D  BRL      3.4    76.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 286 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    282D  PHE*     2.8    57.7    -      -       +      +
    283D  GLN*     3.5    18.8    -      -       -      +
    284D  GLY      3.2     0.2    -      -       -      -
    285D  CYS*     1.3    77.2    -      -       -      +
    287D  PHE*     1.3    62.9    +      -       +      +
    289D  SER*     3.1     7.5    +      -       -      -
    290D  VAL*     2.9    31.1    +      -       -      +
    464D  SER      4.3     6.9    +      -       -      +
    465D  LEU*     3.0    22.0    -      -       -      +
    466D  HIS*     3.6    24.7    +      -       +      +
    469D  LEU*     3.7    19.6    -      -       +      +
    503D  BRL      4.2     7.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 287 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    270D  LEU*     3.1    65.7    -      -       +      -
    283D  GLN*     3.1    32.5    +      -       +      +
    284D  GLY*     3.2     4.5    +      -       -      +
    286D  GLN*     1.3    80.4    -      -       +      +
    288D  ARG*     1.3    65.4    +      -       -      +
    290D  VAL*     3.2    12.2    +      -       +      +
    291D  GLU*     3.2    29.3    +      -       -      +
    466D  HIS*     3.6    35.7    -      +       +      -
----------------------------------------------------------
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Residues in contact with ARG 288 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    226D  PHE*     5.8     0.2    -      -       -      -
    284D  GLY      3.0    14.2    +      -       -      +
    285D  CYS*     3.6     9.4    -      -       -      +
    287D  PHE*     1.3    75.7    -      -       -      +
    289D  SER*     1.3    57.9    +      -       -      +
    291D  GLU*     3.2    47.8    +      -       -      +
    292D  ALA*     3.0    37.8    +      -       +      +
    295D  GLU*     3.2    32.5    +      -       -      -
    333D  LEU*     5.7     9.3    -      -       -      +
    342D  SER      6.2     2.7    -      -       -      +
    503D  BRL      4.2    32.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 289 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    285D  CYS      2.9    12.9    +      -       -      -
    286D  GLN      3.2    11.7    -      -       -      -
    288D  ARG*     1.3    76.4    -      -       -      +
    290D  VAL*     1.3    56.7    +      -       -      +
    292D  ALA*     3.3     8.1    +      -       -      +
    293D  VAL*     2.9    32.5    +      -       -      +
    323D  HIS*     4.1     0.2    +      -       -      -
    326D  ILE*     3.4    17.2    -      -       -      +
    469D  LEU*     3.7     9.5    -      -       -      +
    503D  BRL      3.0    41.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 290 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    286D  GLN      2.9    16.4    +      -       -      +
    287D  PHE*     3.2    16.1    +      -       +      +
    289D  SER*     1.3    74.4    -      -       -      +
    291D  GLU*     1.3    68.2    +      -       +      +
    293D  VAL*     3.6     3.3    +      -       -      +
    294D  GLN*     3.1    39.6    +      -       -      +
    466D  HIS*     3.5    53.8    -      -       +      +
    468D  LEU*     4.1    16.7    -      -       +      +
    469D  LEU*     4.3    10.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 291 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    270D  LEU*     5.7     1.9    -      -       -      +
    287D  PHE*     3.2    21.3    +      -       -      +
    288D  ARG*     3.2    37.9    +      -       -      +
    290D  VAL*     1.3    77.5    -      -       +      +
    292D  ALA*     1.3    63.7    +      -       -      +
    294D  GLN*     2.9    26.3    +      -       -      +
    295D  GLU*     3.1    18.6    +      -       -      +
    343D  GLU*     3.9    17.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 292 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    288D  ARG*     3.0    35.6    +      -       -      +
    289D  SER*     3.5     9.9    -      -       -      +
    291D  GLU*     1.3    76.6    -      -       -      +
    293D  VAL*     1.3    64.7    +      -       -      +
    295D  GLU*     3.0     7.3    +      -       -      +
    296D  ILE*     2.7    32.2    +      -       +      +
    326D  ILE*     3.8    24.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 293 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    289D  SER*     2.9    26.7    +      -       -      +
    290D  VAL*     3.9     5.8    -      -       -      +
    291D  GLU      3.3     0.4    -      -       -      -
    292D  ALA*     1.3    72.2    -      -       -      +
    294D  GLN*     1.3    53.7    +      -       -      +
    296D  ILE*     3.5     1.4    +      -       -      +
    297D  THR*     2.6    46.9    +      -       -      +
    322D  VAL*     3.5    44.2    -      -       +      -
    326D  ILE*     4.3     4.9    -      -       +      -
    468D  LEU*     4.0    17.3    -      -       +      -
    469D  LEU*     5.2     2.7    -      -       +      -
    472D  ILE*     3.8    13.0    -      -       +      -
    690E  LEU*     4.0    21.5    -      -       +      -
    693E  LEU*     4.5     2.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 294 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    290D  VAL*     3.1    34.1    +      -       -      +
    291D  GLU*     2.9    13.0    +      -       -      +
    293D  VAL*     1.3    75.0    -      -       -      +
    295D  GLU*     1.3    65.5    +      -       +      +
    297D  THR*     3.4     6.9    +      -       -      -
    298D  GLU*     3.1    23.4    +      -       -      +
    468D  LEU*     4.8     3.5    -      -       +      +
    692E  ARG*     4.4     7.8    +      -       -      +
    693E  LEU*     3.9    23.7    -      -       +      +
    698E  SER*     2.8    44.5    +      -       -      +
    699E  PRO*     4.9     1.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 295 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    225D  SER*     3.4    27.9    -      -       -      +
    226D  PHE*     3.5    21.4    -      -       +      -
    227D  PRO*     3.8    24.5    -      -       +      +
    288D  ARG*     3.2    40.1    +      -       -      -
    291D  GLU*     3.1    16.2    +      -       -      +
    292D  ALA*     3.0     7.3    +      -       -      +
    294D  GLN*     1.3    75.7    -      -       +      +
    296D  ILE*     1.3    62.8    +      -       -      +
    298D  GLU*     3.4     8.4    +      -       -      +
    299D  TYR*     3.1    17.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 296 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    226D  PHE*     4.0    18.4    -      -       +      -
    292D  ALA*     2.7    22.9    +      -       +      +
    293D  VAL      3.7     4.0    -      -       -      +
    295D  GLU*     1.3    75.0    -      -       -      +
    297D  THR*     1.3    61.2    +      -       -      +
    299D  TYR*     3.1     3.3    +      -       +      +
    300D  ALA*     2.8    28.1    +      -       -      +
    318D  LEU*     5.1     5.2    -      -       +      -
    322D  VAL*     3.7    36.1    -      -       +      +
    325D  ILE*     3.6    50.5    -      -       +      -
    326D  ILE*     3.8    17.3    -      -       +      +
    329D  MET*     5.1     1.6    -      -       -      -
    388D  ILE*     5.6     0.7    -      -       +      -
    392D  ILE*     4.3     8.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with THR 297 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    293D  VAL*     2.6    38.3    +      -       -      +
    294D  GLN*     3.7     7.7    -      -       -      -
    295D  GLU      3.4     0.2    -      -       -      -
    296D  ILE*     1.3    73.7    -      -       -      +
    298D  GLU*     1.3    63.6    +      -       -      +
    300D  ALA*     3.4     8.3    +      -       -      +
    301D  LYS*     3.2    29.2    +      -       +      +
    318D  LEU*     4.1    28.5    -      -       +      +
    322D  VAL*     5.2     0.3    -      -       -      +
    690E  LEU*     4.7     2.0    -      -       -      +
    693E  LEU*     3.9    40.3    -      -       +      +
    694E  LEU*     4.1     4.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 298 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    225D  SER*     4.2    13.2    -      -       -      +
    294D  GLN      3.1    12.3    +      -       -      +
    295D  GLU*     3.5    10.5    -      -       -      +
    296D  ILE      3.1     0.4    -      -       -      -
    297D  THR*     1.3    78.5    -      -       -      +
    299D  TYR*     1.3    66.6    +      -       -      +
    301D  LYS*     3.2    45.3    +      -       -      +
    302D  SER*     3.4     9.2    +      -       -      -
    693E  LEU      4.6     0.5    -      -       -      +
    697E  GLY*     4.1    12.3    -      -       -      -
    698E  SER*     4.4     7.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 299 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    218D  LEU*     3.3    43.3    +      -       +      +
    221D  SER*     3.4    14.6    -      -       -      -
    222D  TYR*     3.6    22.9    -      +       +      -
    225D  SER*     3.8     7.8    +      -       -      +
    226D  PHE*     3.8    17.5    -      +       +      -
    295D  GLU      3.1     9.8    +      -       -      +
    296D  ILE*     3.1     7.7    +      -       -      +
    298D  GLU*     1.3    78.8    -      -       -      +
    300D  ALA*     1.3    65.5    +      -       -      +
    302D  SER*     2.4    37.0    +      -       -      -
    303D  ILE*     3.5     7.5    +      -       +      +
    385D  ALA*     2.5    36.0    +      -       -      -
    388D  ILE*     3.9    27.1    -      -       +      -
    389D  ALA*     4.2    10.8    -      -       +      -
    392D  ILE*     4.5     7.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 300 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    296D  ILE      2.8    13.5    +      -       -      +
    297D  THR      3.5    10.1    -      -       -      +
    299D  TYR*     1.3    76.6    -      -       -      +
    301D  LYS*     1.3    56.6    +      -       -      +
    303D  ILE*     2.8    38.8    +      -       -      +
    306D  PHE*     3.7    25.4    -      -       +      +
    318D  LEU*     3.8    20.9    -      -       +      -
    392D  ILE*     3.8    17.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 301 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    297D  THR*     3.2    21.7    +      -       +      +
    298D  GLU*     3.2    37.5    +      -       -      +
    299D  TYR      3.1     0.8    -      -       -      -
    300D  ALA*     1.3    78.5    -      -       -      +
    302D  SER*     1.3    59.6    +      -       -      +
    303D  ILE      3.2     5.0    +      -       -      +
    306D  PHE*     4.3     1.1    -      -       +      -
    307D  VAL*     3.7    38.5    -      -       +      +
    693E  LEU      2.7    26.3    +      -       -      -
    694E  LEU*     3.2    37.7    +      -       +      +
    695E  GLN      4.9     1.0    +      -       -      -
    696E  GLU      4.6     1.4    -      -       -      -
    697E  GLY*     3.8     8.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 302 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    217D  HIS*     3.1    28.4    +      -       -      -
    218D  LEU*     4.8     1.1    -      -       -      +
    221D  SER*     3.0    36.6    +      -       -      -
    224D  LYS*     6.3     0.4    -      -       -      -
    225D  SER*     5.7     0.2    -      -       -      -
    298D  GLU      3.4     5.6    +      -       -      -
    299D  TYR*     2.4    39.5    +      -       -      -
    301D  LYS*     1.3    71.2    -      -       -      +
    303D  ILE*     1.3    57.0    +      -       -      +
    304D  PRO*     3.3     5.0    -      -       -      +
----------------------------------------------------------
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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
------------------------------------------------------------
  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