Contacts of the helix formed by residues 329 - 356 (chain D) in PDB entry 1SMK


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 ASN 329 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    230D  SER*     3.4    28.4    +      -       -      +
    243D  ILE*     5.3    10.5    -      -       -      +
    328D  LEU*     1.3    75.0    -      -       -      +
    330D  GLU*     1.3    54.3    +      -       -      +
    331D  TYR*     3.2    11.8    +      -       -      +
    332D  GLU*     2.8    46.1    +      -       -      +
    333D  ARG*     2.7    38.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 330 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    329D  ASN*     1.3    73.4    -      -       -      +
    331D  TYR*     1.3    66.8    +      -       -      +
    333D  ARG*     2.9    39.0    +      -       -      +
    334D  ILE*     2.8    45.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 331 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    226D  LEU*     6.1     3.4    -      -       +      -
    229D  LEU*     5.5     1.1    -      -       +      -
    240D  GLN*     6.6     0.2    -      -       +      -
    243D  ILE*     3.6    27.1    -      -       +      -
    244D  SER*     4.0    16.5    +      -       -      -
    247D  THR*     3.6    41.2    -      -       +      +
    329D  ASN*     3.2    12.9    +      -       -      +
    330D  GLU*     1.3    81.3    -      -       -      +
    332D  GLU*     1.3    69.5    +      -       +      +
    334D  ILE*     3.0    10.0    +      -       +      +
    335D  GLY*     2.9    25.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 332 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    226D  LEU*     3.8    11.8    -      -       +      +
    227D  PRO      3.8     6.9    -      -       -      +
    228D  LEU*     3.0    21.4    -      -       +      -
    229D  LEU*     2.8    17.1    +      -       +      +
    230D  SER*     2.6    47.8    +      -       -      -
    327D  PRO      4.3     0.2    -      -       -      +
    328D  LEU*     3.6    15.5    -      -       +      -
    329D  ASN*     2.8    38.0    +      -       -      +
    331D  TYR*     1.3    81.8    -      -       +      +
    333D  ARG*     1.3    59.9    +      -       -      +
    335D  GLY*     3.6     0.8    -      -       -      +
    336D  LEU*     2.8    32.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 333 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    328D  LEU*     2.9    41.8    +      -       +      +
    329D  ASN*     2.7    18.1    +      -       -      +
    330D  GLU*     3.1    48.5    +      -       -      +
    332D  GLU*     1.3    72.5    -      -       -      +
    334D  ILE*     1.3    62.6    +      -       +      +
    336D  LEU*     3.4     7.1    +      -       +      +
    337D  GLU*     3.2    19.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 334 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    330D  GLU*     2.8    40.1    +      -       +      +
    331D  TYR*     3.4    10.3    -      -       +      +
    333D  ARG*     1.3    76.3    -      -       -      +
    335D  GLY*     1.3    65.0    +      -       -      +
    337D  GLU*     3.2    16.1    +      -       +      +
    338D  LYS*     3.2    26.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 335 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    223D  VAL      4.3     2.8    -      -       -      +
    226D  LEU*     3.9    18.2    -      -       -      +
    331D  TYR*     2.9    16.0    +      -       -      -
    332D  GLU      3.1     3.3    +      -       -      -
    334D  ILE*     1.3    78.7    -      -       -      +
    336D  LEU*     1.3    56.8    +      -       -      +
    338D  LYS*     3.2    10.6    +      -       -      +
    339D  ALA*     2.8    28.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 336 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    226D  LEU*     3.4    18.5    -      -       +      +
    308D  PHE*     3.6    27.6    -      -       +      -
    325D  LEU*     3.9    16.6    -      -       +      -
    328D  LEU*     3.5    22.9    -      -       +      -
    332D  GLU      2.8    16.4    +      -       -      +
    333D  ARG*     3.5     9.4    -      -       +      +
    335D  GLY*     1.3    74.9    -      -       -      +
    337D  GLU*     1.3    60.3    +      -       -      +
    339D  ALA*     4.2     2.7    -      -       +      -
    340D  LYS*     2.8    72.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 337 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    333D  ARG      3.2     9.5    +      -       -      +
    334D  ILE*     3.2    18.3    +      -       +      +
    336D  LEU*     1.3    77.6    -      -       -      +
    338D  LYS*     1.3    61.7    +      -       +      +
    340D  LYS*     3.5     9.0    +      -       -      +
    341D  LYS*     3.2    57.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 338 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    223D  VAL*     3.7    45.2    -      -       +      +
    334D  ILE*     3.2    17.8    +      -       +      +
    335D  GLY*     3.3    13.2    -      -       -      +
    337D  GLU*     1.3    77.0    -      -       +      +
    339D  ALA*     1.3    66.4    +      -       -      +
    341D  LYS*     3.2    17.6    +      -       -      +
    342D  GLU*     3.3    14.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 339 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    218D  GLY*     5.1     6.3    -      -       -      -
    223D  VAL*     3.5    23.3    +      -       -      +
    224D  THR*     3.6    23.9    +      -       -      +
    226D  LEU*     4.8     7.4    -      -       +      -
    308D  PHE*     5.4     1.3    -      -       +      -
    335D  GLY      2.8    17.7    +      -       -      +
    336D  LEU*     3.6    11.9    -      -       +      +
    338D  LYS*     1.3    73.2    -      -       -      +
    340D  LYS*     1.3    58.9    +      -       +      +
    341D  LYS      3.2     0.5    +      -       -      -
    342D  GLU*     3.2     1.0    +      -       -      +
    343D  LEU*     2.8    34.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 340 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    303D  THR*     4.3    13.7    -      -       -      +
    304D  GLU*     3.0    39.4    +      -       -      +
    305D  LEU*     3.6    24.2    -      -       +      +
    308D  PHE*     4.5     4.7    -      -       +      -
    336D  LEU*     2.8    60.7    +      -       +      +
    337D  GLU*     3.7     8.3    -      -       -      +
    339D  ALA*     1.3    73.0    -      -       -      +
    341D  LYS*     1.3    58.2    +      -       +      +
    343D  LEU*     4.5     0.2    -      -       -      -
    344D  ALA*     3.0    30.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 341 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    337D  GLU*     3.2    43.9    +      -       +      +
    338D  LYS*     3.2    11.2    +      -       -      +
    340D  LYS*     1.3    78.9    -      -       +      +
    342D  GLU*     1.3    65.4    +      -       -      +
    344D  ALA*     3.5     5.7    +      -       -      +
    345D  GLY*     3.4    13.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 342 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    165D  ASN*     5.0     0.7    +      -       -      -
    221D  ALA*     3.6    27.0    -      -       -      +
    222D  GLY*     4.9     1.0    -      -       -      -
    223D  VAL*     3.2    29.3    +      -       +      +
    224D  THR*     4.2     6.7    -      -       -      -
    338D  LYS      3.3     8.1    +      -       -      +
    339D  ALA*     3.2     7.1    +      -       -      +
    341D  LYS*     1.3    79.9    -      -       -      +
    343D  LEU*     1.3    58.9    +      -       -      +
    345D  GLY*     3.2     4.4    +      -       -      -
    346D  SER*     3.0    32.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 343 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    165D  ASN*     3.2    37.9    -      -       +      +
    218D  GLY      4.0     6.1    -      -       -      +
    219D  GLY*     4.5     0.4    -      -       -      -
    224D  THR*     3.5    11.2    +      -       -      +
    297D  PHE*     3.7    21.1    -      -       +      -
    305D  LEU*     3.7    19.1    -      -       +      -
    307D  PHE      3.4    23.1    -      -       -      +
    308D  PHE*     3.7    18.8    -      -       +      -
    339D  ALA      2.8    18.0    +      -       -      +
    342D  GLU*     1.3    74.8    -      -       -      +
    344D  ALA*     1.3    66.9    +      -       -      +
    346D  SER*     2.9     3.2    +      -       -      -
    347D  ILE*     2.8    36.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 344 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    305D  LEU*     3.7    14.3    -      -       +      +
    306D  PRO*     6.5     0.2    -      -       -      -
    340D  LYS      3.0    20.6    +      -       -      +
    341D  LYS*     3.6     7.6    -      -       -      +
    343D  LEU*     1.3    76.3    -      -       -      +
    345D  GLY*     1.3    64.1    +      -       -      +
    347D  ILE*     3.5     5.3    +      -       -      +
    348D  GLU*     3.1    22.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 345 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    341D  LYS      3.4     5.9    +      -       -      -
    342D  GLU*     3.2     7.0    +      -       -      -
    343D  LEU      3.1     0.4    -      -       -      -
    344D  ALA*     1.3    82.5    -      -       -      +
    346D  SER*     1.3    56.2    +      -       -      +
    348D  GLU*     3.4     7.4    +      -       -      +
    349D  LYS*     3.1    27.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 346 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    165D  ASN*     3.7    33.3    +      -       -      +
    166D  SER*     2.6    27.6    +      -       -      -
    221D  ALA*     6.0     0.5    -      -       -      +
    342D  GLU*     3.0    22.6    +      -       -      +
    343D  LEU*     2.9    10.3    +      -       -      -
    345D  GLY*     1.3    72.4    -      -       -      +
    347D  ILE*     1.3    65.9    +      -       -      +
    349D  LYS*     3.5     4.5    +      -       -      +
    350D  GLY      3.1    10.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 347 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    165D  ASN      3.8    16.2    -      -       -      +
    169D  PRO*     4.0    15.7    -      -       +      +
    297D  PHE*     4.5     0.2    -      -       +      -
    305D  LEU*     4.3     5.4    -      -       +      -
    306D  PRO*     3.6    29.6    -      -       +      -
    307D  PHE*     3.4    42.4    -      -       +      +
    343D  LEU*     2.8    32.8    +      -       +      +
    344D  ALA*     3.8     4.9    -      -       -      +
    346D  SER*     1.3    72.4    -      -       -      +
    348D  GLU*     1.3    67.7    +      -       -      +
    350D  GLY*     3.2     1.7    +      -       -      -
    351D  VAL*     2.9    36.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 348 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    344D  ALA      3.1    14.6    +      -       -      +
    345D  GLY*     3.5    12.3    -      -       -      +
    346D  SER      3.2     0.2    -      -       -      -
    347D  ILE*     1.3    76.6    -      -       -      +
    349D  LYS*     1.3    66.0    +      -       -      +
    351D  VAL*     2.9    11.1    +      -       -      +
    352D  SER*     2.5    51.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 349 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    131D  ASP*     5.4     4.0    +      -       -      -
    132D  ASP*     3.9    19.2    +      -       -      -
    134D  PHE*     3.4    53.0    -      -       +      +
    166D  SER*     4.2     4.0    -      -       -      +
    345D  GLY      3.1    13.8    +      -       -      +
    346D  SER*     3.7     7.4    -      -       -      +
    347D  ILE      3.4     0.2    -      -       -      -
    348D  GLU*     1.3    81.0    -      -       -      +
    350D  GLY*     1.3    62.0    +      -       -      +
    352D  SER*     3.7     6.7    +      -       -      -
    353D  PHE*     3.3    16.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 350 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    134D  PHE*     4.4     2.2    -      -       -      -
    166D  SER*     3.8    26.0    -      -       -      -
    169D  PRO*     4.7     0.2    -      -       -      -
    170D  ILE*     3.3    28.2    -      -       -      +
    346D  SER      3.1    10.4    +      -       -      -
    347D  ILE      3.6     3.4    -      -       -      -
    348D  GLU      3.0     1.0    -      -       -      -
    349D  LYS*     1.3    77.3    -      -       -      +
    351D  VAL*     1.3    64.4    +      -       -      +
    353D  PHE*     3.3    12.0    +      -       -      +
    354D  ILE*     3.9     2.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 351 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    169D  PRO*     4.2    11.2    -      -       +      +
    173D  GLU*     3.9    25.5    -      -       +      +
    306D  PRO*     6.2     0.4    -      -       +      -
    307D  PHE*     5.5     4.3    -      -       +      -
    347D  ILE*     2.9    38.5    +      -       +      +
    348D  GLU*     3.6     9.9    -      -       -      +
    350D  GLY*     1.3    70.8    -      -       -      +
    352D  SER*     1.3    60.5    +      -       -      +
    354D  ILE*     3.1     7.1    +      -       -      +
    355D  ARG*     2.9    48.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 352 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    348D  GLU*     2.5    40.9    +      -       -      +
    349D  LYS*     3.8     7.9    -      -       -      -
    351D  VAL*     1.3    73.0    -      -       -      +
    353D  PHE*     1.3    59.2    +      -       -      +
    354D  ILE      2.9     4.9    -      -       -      -
    355D  ARG*     4.3     5.8    -      -       -      +
    356D  SER*     2.7    46.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 353 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    134D  PHE*     4.1    21.3    -      +       +      -
    135D  LYS*     4.4    11.0    -      -       -      -
    138D  ALA*     3.6    42.2    -      -       +      -
    139D  GLY*     3.9    11.2    -      -       -      -
    142D  LYS*     4.0    22.3    -      -       +      -
    170D  ILE*     4.3     6.3    -      -       +      -
    349D  LYS      3.3    10.0    +      -       -      +
    350D  GLY      3.3    13.3    +      -       -      +
    352D  SER*     1.3    77.4    -      -       -      +
    354D  ILE*     1.3    69.9    +      -       +      +
    356D  SER*     4.1     7.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 354 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    142D  LYS*     4.0    21.8    -      -       +      -
    170D  ILE*     3.8    31.6    -      -       +      +
    173D  GLU*     3.6    33.9    -      -       +      +
    174D  VAL*     3.6    22.7    -      -       +      +
    177D  LYS*     4.8    19.9    +      -       +      +
    350D  GLY      4.5     1.3    -      -       -      +
    351D  VAL      3.1     3.2    +      -       -      +
    352D  SER      2.8     0.8    +      -       -      -
    353D  PHE*     1.3    97.9    -      -       +      +
    355D  ARG*     1.3    67.6    +      -       -      +
    356D  SER      3.0    10.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 355 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    173D  GLU*     2.7    35.2    +      -       -      +
    176D  LYS*     4.0    16.3    -      -       -      +
    351D  VAL*     2.9    38.1    +      -       +      +
    352D  SER*     4.2     3.8    -      -       -      +
    354D  ILE*     1.3    77.7    -      -       -      +
    356D  SER*     1.3    60.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 356 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    352D  SER*     2.7    33.5    +      -       -      -
    353D  PHE*     4.1     7.4    -      -       -      +
    354D  ILE      3.0    15.2    -      -       -      +
    355D  ARG*     1.3    74.5    -      -       -      +
----------------------------------------------------------
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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