Contacts of the helix formed by residues 283 - 314 (chain D) in PDB entry 4LML


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 283 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    278D  LEU*     3.1    29.3    +      -       +      +
    281D  GLU*     4.3     9.2    +      -       +      +
    282D  SER*     1.3    80.5    -      -       -      +
    284D  PRO*     1.4    61.0    -      -       -      +
    285D  ALA*     3.0    14.8    -      -       +      +
    286D  ARG*     3.1    57.6    +      -       +      +
    287D  ALA      3.5     6.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with PRO 284 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    279D  LYS*     4.1    28.9    -      -       +      +
    282D  SER*     3.3    10.8    -      -       -      +
    283D  GLN*     1.4    86.0    -      -       -      +
    285D  ALA*     1.3    65.6    +      -       +      +
    286D  ARG      3.1     0.4    -      -       -      -
    287D  ALA*     3.5    13.7    -      -       +      -
    288D  ALA*     2.9    29.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 285 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    283D  GLN*     4.6    11.4    -      -       +      -
    284D  PRO*     1.3    80.6    -      -       +      +
    286D  ARG*     1.3    60.3    +      -       -      +
    288D  ALA*     4.7     2.4    -      -       -      +
    289D  SER*     3.8    15.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 286 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    278D  LEU*     3.5    25.1    -      -       +      +
    283D  GLN*     3.1    40.1    +      -       -      +
    284D  PRO      3.1     0.2    -      -       -      -
    285D  ALA*     1.3    78.4    -      -       -      +
    287D  ALA*     1.3    60.1    +      -       -      +
    289D  SER*     3.1     9.1    +      -       -      -
    290D  ILE*     3.0    40.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 287 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    275D  GLN*     3.8    32.4    -      -       +      +
    278D  LEU*     3.5    20.0    -      -       +      +
    279D  LYS*     4.9     4.3    -      -       +      +
    283D  GLN      3.5     0.4    +      -       -      +
    284D  PRO*     3.0    21.4    +      -       +      +
    286D  ARG*     1.3    79.5    -      -       -      +
    288D  ALA*     1.3    57.5    +      -       -      +
    290D  ILE*     3.4     5.9    +      -       -      +
    291D  THR*     2.8    34.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 288 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    275D  GLN*     5.4     0.9    -      -       -      -
    284D  PRO*     2.9    14.6    +      -       +      +
    285D  ALA      4.7     2.5    -      -       -      +
    287D  ALA*     1.3    73.6    -      -       -      +
    289D  SER*     1.3    59.8    +      -       -      +
    291D  THR*     3.9     5.9    -      -       -      -
    292D  ARG*     3.0    32.1    +      -       -      +
----------------------------------------------------------
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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  ALA      3.8    12.4    +      -       -      -
    286D  ARG*     3.1    16.0    +      -       -      -
    288D  ALA*     1.3    77.1    -      -       -      +
    290D  ILE*     1.3    65.7    +      -       -      +
    292D  ARG*     3.4     4.7    +      -       -      +
    293D  ALA*     3.0    23.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 290 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    271D  GLU*     4.4    20.0    -      -       +      +
    274D  VAL*     3.9    28.7    -      -       +      -
    275D  GLN*     6.3     2.7    -      -       +      -
    278D  LEU*     3.9    18.6    -      -       +      -
    286D  ARG*     3.0    21.7    +      -       +      +
    287D  ALA*     3.6     6.1    -      -       -      +
    289D  SER*     1.3    74.4    -      -       -      +
    291D  THR*     1.3    65.1    +      -       -      +
    293D  ALA*     3.0    10.7    +      -       -      +
    294D  SER*     3.0    23.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 291 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    214D  ALA      5.0     1.1    -      -       -      +
    215D  PHE*     3.0    39.0    -      -       +      +
    217D  SER      5.3     2.0    -      -       -      +
    271D  GLU*     3.2    21.5    +      -       -      +
    275D  GLN*     2.4    31.7    +      -       -      +
    287D  ALA      2.8    12.2    +      -       -      -
    288D  ALA*     3.9     6.5    -      -       -      -
    290D  ILE*     1.3    78.1    -      -       -      +
    292D  ARG*     1.3    61.7    +      -       -      +
    294D  SER*     3.1     5.7    +      -       -      -
    295D  ARG*     3.0    29.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 292 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    288D  ALA      3.0    19.6    +      -       -      +
    289D  SER*     3.9     5.6    -      -       -      +
    291D  THR*     1.3    74.6    -      -       -      +
    293D  ALA*     1.3    65.9    +      -       -      +
    295D  ARG*     3.4    50.5    +      -       -      +
    296D  ILE*     4.0    26.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 293 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    289D  SER      3.0    14.2    +      -       -      +
    290D  ILE*     3.0    11.9    +      -       +      +
    292D  ARG*     1.3    73.1    -      -       -      +
    294D  SER*     1.3    67.5    -      -       -      +
    295D  ARG      3.3     0.2    +      -       -      -
    296D  ILE*     3.4     5.1    +      -       -      +
    297D  ALA*     3.0    26.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 294 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    215D  PHE*     3.5    21.1    -      -       -      -
    271D  GLU*     3.1    33.0    +      -       -      +
    290D  ILE*     3.0    10.4    +      -       -      +
    291D  THR      3.2    10.1    -      -       -      -
    293D  ALA*     1.3    76.9    -      -       -      +
    295D  ARG*     1.3    63.7    +      -       -      +
    296D  ILE      2.9     0.2    +      -       -      -
    297D  ALA*     4.4     2.5    -      -       -      -
    298D  PHE*     2.9    44.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 295 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    277A  TYR*     3.4    45.6    +      -       -      -
    215D  PHE*     2.9    39.4    +      -       +      -
    216D  TRP*     3.6    56.7    -      -       +      +
    291D  THR*     3.0    18.6    +      -       -      +
    292D  ARG*     3.6    47.6    -      -       -      +
    293D  ALA      3.3     0.4    -      -       -      -
    294D  SER*     1.3    74.4    -      -       -      +
    296D  ILE*     1.3    62.1    +      -       -      +
    299D  PRO*     3.3    18.5    -      -       -      +
----------------------------------------------------------
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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
----------------------------------------------------------
    292D  ARG*     4.0    27.8    +      -       -      +
    293D  ALA*     3.4     5.4    +      -       -      +
    294D  SER      3.1     0.2    -      -       -      -
    295D  ARG*     1.3    82.3    -      -       -      +
    297D  ALA*     1.3    70.3    +      -       -      +
    298D  PHE      3.2     1.3    -      -       -      -
    299D  PRO*     3.1     6.9    -      -       +      +
    300D  VAL*     2.9    45.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 297 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    293D  ALA*     3.0    22.0    +      -       +      +
    294D  SER*     4.1     3.6    -      -       -      +
    296D  ILE*     1.3    77.8    -      -       -      +
    298D  PHE*     1.3    58.6    +      -       +      +
    300D  VAL*     4.2     6.3    -      -       -      -
    301D  VAL*     2.5    50.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 298 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    212D  TRP*     3.3    34.4    -      +       +      -
    215D  PHE*     3.4    27.4    -      +       +      -
    264D  PHE*     4.2     9.0    -      +       +      -
    267D  VAL*     3.9    29.4    -      -       +      -
    268D  ALA*     4.0    25.8    -      -       +      -
    271D  GLU*     4.8     4.0    -      -       +      -
    294D  SER*     2.9    40.0    +      -       -      +
    297D  ALA*     1.3    77.4    -      -       +      +
    299D  PRO*     1.4    64.8    -      -       +      +
    301D  VAL*     4.1     4.2    -      -       +      +
    302D  PHE*     2.9    31.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with PRO 299 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    209D  PHE*     6.5     0.2    -      -       +      -
    212D  TRP*     4.0    26.0    -      -       +      +
    215D  PHE*     5.6     0.9    -      -       +      -
    216D  TRP*     6.3     0.4    -      -       +      -
    295D  ARG*     3.3    23.3    -      -       -      +
    296D  ILE*     3.1    18.2    -      -       +      +
    298D  PHE*     1.4    87.6    -      -       +      +
    300D  VAL*     1.3    54.0    +      -       +      +
    302D  PHE*     3.5     2.7    -      -       +      +
    303D  LEU*     2.7    37.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 300 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    296D  ILE*     2.9    43.7    +      -       +      +
    297D  ALA*     3.6     5.8    -      -       -      +
    299D  PRO*     1.3    75.0    -      -       +      +
    301D  VAL*     1.3    59.1    +      -       +      +
    303D  LEU*     3.4     4.9    +      -       -      +
    304D  LEU*     2.7    45.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 301 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    264D  PHE*     3.7    22.9    -      -       +      -
    297D  ALA*     2.5    40.4    +      -       +      +
    298D  PHE*     4.1     4.5    -      -       +      +
    300D  VAL*     1.3    75.1    -      -       +      +
    302D  PHE*     1.3    52.5    +      -       -      +
    304D  LEU*     3.3     8.2    +      -       +      +
    305D  ALA*     2.6    43.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 302 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    205D  LEU*     4.3    17.0    -      -       +      -
    208D  LEU*     3.6    29.2    -      -       +      -
    209D  PHE*     4.5    16.2    -      +       -      -
    212D  TRP*     3.8    12.8    -      +       +      -
    260D  MET*     4.7     3.4    -      -       -      -
    261D  ILE*     4.5    15.0    -      -       +      -
    264D  PHE*     3.3    32.0    -      +       +      -
    298D  PHE      2.9    20.4    +      -       -      +
    299D  PRO*     3.5     4.7    -      -       +      +
    301D  VAL*     1.3    76.6    -      -       -      +
    303D  LEU*     1.3    61.2    -      -       +      +
    304D  LEU      3.1     0.3    +      -       -      -
    305D  ALA*     3.1     1.8    +      -       -      +
    306D  ASN*     2.8    70.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 303 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    299D  PRO      2.7    22.3    +      -       -      +
    300D  VAL*     3.9     4.9    -      -       -      +
    302D  PHE*     1.3    80.1    -      -       +      +
    304D  LEU*     1.3    60.9    +      -       +      +
    306D  ASN*     4.1     5.1    -      -       -      +
    307D  ILE*     3.1    51.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 304 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    300D  VAL*     2.7    30.3    +      -       +      +
    301D  VAL*     3.4     7.6    -      -       +      +
    303D  LEU*     1.3    74.0    -      -       +      +
    305D  ALA*     1.3    54.4    +      -       -      +
    307D  ILE*     2.9    16.9    +      -       +      +
    308D  ILE*     2.7    51.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 305 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    260D  MET*     3.9    25.9    -      -       +      +
    264D  PHE*     4.6     5.2    -      -       +      -
    301D  VAL*     2.6    25.3    +      -       +      +
    302D  PHE*     3.7     2.9    -      -       -      +
    304D  LEU*     1.3    73.5    -      -       -      +
    306D  ASN*     1.3    55.7    +      -       -      +
    308D  ILE*     3.3    11.4    +      -       -      +
    309D  LEU*     2.8    32.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 306 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    205D  LEU*     6.0     1.6    -      -       -      +
    253D  TYR*     4.9     6.2    +      -       -      -
    257D  ILE*     5.0    18.8    -      -       -      +
    260D  MET*     3.9    16.0    -      -       -      +
    302D  PHE*     2.8    65.2    +      -       +      +
    303D  LEU*     4.2     5.6    -      -       -      +
    305D  ALA*     1.3    72.5    -      -       -      +
    307D  ILE*     1.3    57.7    +      -       +      +
    309D  LEU*     4.0     2.1    -      -       -      +
    310D  ALA*     3.0    32.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 307 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    303D  LEU*     3.1    40.3    +      -       +      +
    304D  LEU*     2.9    16.9    +      -       +      +
    306D  ASN*     1.3    80.0    -      -       +      +
    308D  ILE*     1.3    69.2    +      -       +      +
    310D  ALA*     4.0     4.4    -      -       -      +
    311D  PHE*     3.5    20.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 308 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    304D  LEU*     2.7    46.8    +      -       +      +
    305D  ALA*     3.4    11.4    -      -       -      +
    307D  ILE*     1.3    81.5    -      -       +      +
    309D  LEU*     1.3    68.0    +      -       +      +
    311D  PHE*     3.7     6.2    +      -       -      +
    312D  LEU*     3.4    23.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 309 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    253D  TYR*     4.2     5.4    -      -       +      -
    256D  ALA*     4.1    11.0    -      -       +      -
    257D  ILE*     3.6    32.3    -      -       +      +
    260D  MET*     3.5    29.4    -      -       +      -
    305D  ALA      2.8    18.4    +      -       -      +
    306D  ASN*     4.0     3.4    -      -       -      +
    308D  ILE*     1.3    75.2    -      -       +      +
    310D  ALA*     1.3    66.3    +      -       -      +
    312D  LEU*     3.0    32.7    +      -       +      +
    313D  PHE*     3.4    26.5    +      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 310 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    253D  TYR*     3.7    26.8    -      -       +      +
    306D  ASN      3.0    18.7    +      -       -      +
    307D  ILE*     4.0     5.8    -      -       -      +
    309D  LEU*     1.3    76.4    -      -       -      +
    311D  PHE*     1.3    62.4    +      -       -      +
    313D  PHE*     3.3     2.1    +      -       -      -
    314D  PHE*     3.1    30.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 311 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    307D  ILE*     3.5    14.6    +      -       +      +
    308D  ILE*     4.0     5.6    -      -       -      +
    309D  LEU      3.3     0.4    -      -       -      -
    310D  ALA*     1.3    78.0    -      -       -      +
    312D  LEU*     1.3    74.3    +      -       +      +
    313D  PHE      2.9     2.0    +      -       -      -
    315D  GLY*     3.1    45.8    +      -       -      +
    316D  PHE*     3.5    33.1    +      +       +      +
----------------------------------------------------------
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Residues in contact with LEU 312 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    308D  ILE*     3.4    16.2    +      -       +      +
    309D  LEU*     3.0    26.5    +      -       +      +
    311D  PHE*     1.3    90.4    -      -       +      +
    313D  PHE*     1.3    65.8    +      -       +      +
    316D  PHE*     4.6    24.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 313 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    116D  ARG*     4.0    22.4    -      -       +      -
    117D  ARG*     4.5    12.4    +      -       +      +
    251D  MET*     3.6    26.9    -      -       +      -
    252D  THR      3.6     8.1    -      -       -      -
    253D  TYR*     3.2    54.3    -      +       +      -
    256D  ALA*     4.4     9.9    -      -       +      -
    309D  LEU*     3.4    17.4    +      -       +      -
    310D  ALA      3.3     3.0    +      -       -      +
    311D  PHE      2.9     1.0    +      -       -      -
    312D  LEU*     1.3    86.8    -      -       +      +
    314D  PHE*     1.3    82.8    +      -       +      +
    316D  PHE*     4.1     9.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 314 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    117D  ARG*     3.9    54.8    +      -       +      +
    120D  PHE*     3.5    45.1    -      +       +      -
    253D  TYR*     3.9    33.0    -      +       +      -
    310D  ALA*     3.1    17.0    +      -       +      +
    313D  PHE*     1.3    87.3    -      -       +      +
    315D  GLY*     1.3    60.2    +      -       -      +
    316D  PHE*     3.1    13.6    +      -       -      +
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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