Contacts of the helix formed by residues 325 - 351 (chain F) in PDB entry 3IYD


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 PRO 325 (chain F).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    323F  ASN      4.4     1.8    -      -       -      +
    324F  LYS*     1.3    94.5    -      -       +      +
    326F  TRP*     1.3    63.8    +      -       +      +
    328F  GLU*     4.7     5.9    +      -       +      +
    329F  LYS*     4.2    12.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with TRP 326 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    295F  CYS*     3.9     6.1    -      -       +      +
    296F  LYS*     3.5    21.8    -      -       +      +
    297F  MET*     3.5    37.7    -      -       +      -
    298F  PRO*     4.2    11.7    -      -       +      +
    301F  ASN*     3.3    43.7    -      -       +      +
    305F  LEU*     5.3     0.2    -      -       +      -
    319F  ALA*     4.3    18.2    -      -       +      -
    322F  MET*     4.0    19.7    -      -       +      -
    324F  LYS*     3.4    31.4    -      -       +      +
    325F  PRO*     1.3    83.8    -      -       +      +
    327F  SER*     1.3    74.8    +      -       -      +
    328F  GLU      3.2     2.5    -      -       -      -
    329F  LYS*     3.3    20.5    +      -       +      +
    330F  LEU*     3.2    18.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 327 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    319F  ALA      3.2    27.6    -      -       -      -
    320F  ILE*     3.4    36.5    +      -       -      +
    323F  ASN*     3.8     2.3    -      -       -      -
    324F  LYS*     2.6    38.4    +      -       -      -
    326F  TRP*     1.3    84.8    -      -       -      +
    328F  GLU*     1.3    64.0    +      -       -      +
    329F  LYS      3.1     8.8    +      -       -      -
    330F  LEU*     3.7     9.0    +      -       -      +
    331F  HIS*     3.7     3.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 328 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    320F  ILE*     4.5    11.1    -      -       -      +
    323F  ASN*     5.6     2.6    -      -       -      -
    324F  LYS      3.8     6.4    +      -       -      +
    325F  PRO      5.1     4.5    -      -       -      +
    326F  TRP      3.2     1.0    -      -       -      -
    327F  SER*     1.3    88.7    +      -       -      +
    329F  LYS*     1.3    63.1    +      -       -      +
    330F  LEU      3.8     0.2    -      -       -      -
    331F  HIS*     3.2    32.8    +      -       -      +
    332F  ASP*     5.6     1.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 329 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    294F  GLN      4.3     5.5    +      -       -      -
    295F  CYS*     3.2    53.5    -      -       +      +
    296F  LYS*     5.1     4.0    -      -       +      -
    325F  PRO      4.2     7.4    -      -       -      +
    326F  TRP*     3.4    26.0    -      -       +      +
    327F  SER      3.1     1.0    -      -       -      -
    328F  GLU*     1.3    82.5    -      -       -      +
    330F  LEU*     1.3    62.5    +      -       -      +
    331F  HIS      3.0     6.3    +      -       -      -
    332F  ASP*     3.3    24.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 330 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    291F  CYS*     4.4     8.5    -      -       +      -
    295F  CYS*     3.9    18.8    -      -       +      -
    297F  MET*     3.9    27.1    -      -       +      -
    315F  TRP*     5.8     3.6    -      -       +      -
    316F  PHE*     3.5    32.6    -      -       +      -
    319F  ALA*     3.9    26.0    -      -       +      -
    320F  ILE*     4.0    12.8    -      -       +      -
    326F  TRP*     3.2    22.9    -      -       +      +
    327F  SER*     3.7    11.5    +      -       -      +
    329F  LYS*     1.3    76.1    -      -       -      +
    331F  HIS*     1.3    58.5    +      -       -      +
    332F  ASP      3.1     1.6    -      -       -      -
    333F  VAL*     3.3     6.6    +      -       +      +
    334F  SER*     2.9    30.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with HIS 331 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    316F  PHE*     6.4     0.6    -      +       -      -
    320F  ILE*     3.5    37.1    -      -       +      +
    327F  SER      3.7    12.3    +      -       -      -
    328F  GLU*     3.2    36.0    +      -       -      +
    329F  LYS      3.0     1.3    -      -       -      -
    330F  LEU*     1.3    79.2    -      -       -      +
    332F  ASP*     1.3    64.3    -      -       -      +
    333F  VAL      3.2     2.7    +      -       -      -
    334F  SER*     3.5    19.5    +      -       -      -
    335F  GLU*     5.4     1.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 332 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    294F  GLN*     4.3    14.5    +      -       -      +
    328F  GLU      5.6     1.2    -      -       -      +
    329F  LYS*     3.3    16.7    +      -       -      +
    330F  LEU      3.1     1.0    -      -       -      -
    331F  HIS*     1.3    86.8    -      -       -      +
    333F  VAL*     1.3    60.5    +      -       -      +
    335F  GLU*     5.6     0.4    -      -       -      -
    336F  GLU*     5.2     3.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 333 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    290F  LEU*     3.7    41.5    -      -       +      +
    291F  CYS*     5.5     1.3    -      -       +      -
    294F  GLN*     3.8    12.1    -      -       -      +
    295F  CYS*     4.2     3.6    -      -       -      -
    316F  PHE*     5.0     0.7    -      -       +      -
    330F  LEU*     3.4    26.9    -      -       +      +
    331F  HIS      3.2     0.2    -      -       -      -
    332F  ASP*     1.3    78.5    -      -       -      +
    334F  SER*     1.3    67.4    +      -       -      +
    335F  GLU*     3.1     4.7    -      -       -      +
    336F  GLU*     3.0    34.0    +      -       +      +
    337F  VAL*     2.9    33.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 334 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    316F  PHE*     3.6    27.8    -      -       -      -
    330F  LEU      2.9    16.4    +      -       -      -
    331F  HIS*     3.5    18.5    +      -       -      -
    333F  VAL*     1.3    79.2    -      -       -      +
    335F  GLU*     1.3    64.5    +      -       -      +
    337F  VAL*     3.9     2.5    -      -       -      +
    338F  HIS*     3.0    29.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 335 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    331F  HIS      5.7     1.6    -      -       -      +
    332F  ASP      6.5     0.2    -      -       -      -
    333F  VAL*     3.1     1.7    -      -       -      -
    334F  SER*     1.3    84.4    -      -       -      +
    336F  GLU*     1.3    64.5    +      -       +      +
    338F  HIS*     3.6     5.8    +      -       -      +
    339F  ARG*     3.3    28.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 336 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    287F  ILE*     5.1     0.7    -      -       -      -
    290F  LEU*     3.3    33.7    -      -       +      +
    294F  GLN*     4.9     1.6    +      -       -      +
    332F  ASP      5.2     2.5    -      -       -      +
    333F  VAL*     3.0    25.8    +      -       +      +
    335F  GLU*     1.3    78.3    -      -       +      +
    337F  VAL*     1.3    60.2    +      -       -      +
    339F  ARG*     3.6     5.3    +      -       -      +
    340F  ALA*     3.1    28.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 337 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    287F  ILE*     3.9    33.8    -      -       +      +
    290F  LEU*     5.2     1.8    -      -       +      -
    291F  CYS*     6.3     1.3    -      -       +      -
    313F  ASP*     6.1     0.9    -      -       -      +
    315F  TRP*     4.3    18.4    -      -       +      -
    316F  PHE*     3.9    33.7    -      -       +      -
    333F  VAL*     2.9    38.9    +      -       +      +
    334F  SER      3.9     3.6    -      -       -      +
    336F  GLU*     1.3    76.1    -      -       -      +
    338F  HIS*     1.3    61.5    +      -       -      +
    340F  ALA*     3.2     2.6    +      -       -      +
    341F  LEU*     2.9    30.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with HIS 338 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    313F  ASP*     3.9    21.7    +      -       -      +
    334F  SER      3.0    19.3    +      -       -      +
    335F  GLU*     3.8     6.7    -      -       -      +
    336F  GLU      3.3     0.2    -      -       -      -
    337F  VAL*     1.3    77.4    -      -       -      +
    339F  ARG*     1.3    69.0    +      -       +      +
    341F  LEU*     3.1     6.6    +      -       +      +
    342F  GLN*     3.0    47.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 339 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    283F  GLN*     4.0     0.5    +      -       -      -
    335F  GLU      3.3    16.2    +      -       -      +
    336F  GLU*     4.0     5.6    -      -       -      +
    337F  VAL      3.3     0.2    -      -       -      -
    338F  HIS*     1.3    86.7    -      -       +      +
    340F  ALA*     1.3    59.7    +      -       -      +
    341F  LEU      3.1     1.3    +      -       -      -
    342F  GLN*     4.4    15.6    +      -       -      +
    343F  LYS*     3.5    36.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 340 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    283F  GLN*     3.3    39.5    +      -       -      +
    286F  LEU*     5.6     7.9    -      -       +      -
    287F  ILE*     3.6    28.6    -      -       +      +
    290F  LEU*     6.5     0.4    -      -       +      -
    336F  GLU      3.1    20.2    +      -       -      +
    337F  VAL      3.5     1.3    -      -       -      +
    338F  HIS      3.2     0.4    -      -       -      -
    339F  ARG*     1.3    75.4    -      -       -      +
    341F  LEU*     1.3    57.2    +      -       -      +
    344F  LEU*     3.3    13.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 341 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    287F  ILE*     5.4     6.1    -      -       +      -
    306F  PHE*     5.9     2.0    -      -       +      -
    310F  GLU      5.0     3.6    -      -       -      +
    311F  THR      3.3    17.7    -      -       -      +
    312F  SER*     4.6     1.1    -      -       -      -
    313F  ASP*     3.3    27.8    -      -       -      +
    315F  TRP*     4.5    19.7    -      -       +      +
    337F  VAL*     2.9    20.7    +      -       +      +
    338F  HIS*     3.5     6.7    -      -       +      +
    339F  ARG      3.1     0.4    -      -       -      -
    340F  ALA*     1.3    81.1    -      -       -      +
    342F  GLN*     1.3    67.2    +      -       -      +
    343F  LYS      3.4     0.9    -      -       -      -
    344F  LEU*     3.2    16.7    +      -       +      +
    345F  GLN*     3.1    46.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 342 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    338F  HIS*     3.0    34.8    +      -       +      +
    339F  ARG*     4.4    13.1    +      -       -      +
    341F  LEU*     1.3    81.4    -      -       -      +
    343F  LYS*     1.3    62.7    +      -       -      +
    345F  GLN*     3.2    24.5    +      -       -      +
    346F  GLN*     3.6     5.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 343 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    283F  GLN*     3.8    19.5    -      -       -      +
    339F  ARG*     3.5    24.5    +      -       -      +
    341F  LEU      3.4     0.2    -      -       -      -
    342F  GLN*     1.3    79.9    -      -       -      +
    344F  LEU*     1.3    61.6    +      -       -      +
    346F  GLN*     3.3    33.6    -      -       -      +
    347F  ILE*     3.8    11.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 344 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    280F  VAL*     4.0    20.6    -      -       +      -
    283F  GLN*     3.6    27.3    -      -       +      +
    284F  GLU*     3.6    26.5    -      -       +      +
    287F  ILE*     6.4     0.4    -      -       +      -
    310F  GLU      4.3     5.2    -      -       -      +
    311F  THR      5.6     0.4    -      -       -      +
    340F  ALA      3.3    18.6    +      -       -      +
    341F  LEU*     3.2    21.4    +      -       +      +
    342F  GLN      3.1     0.6    -      -       -      -
    343F  LYS*     1.3    77.8    -      -       -      +
    345F  GLN*     1.3    68.4    +      -       +      +
    346F  GLN      3.3     0.5    +      -       -      -
    347F  ILE*     3.4    14.8    +      -       +      +
    348F  GLU*     3.5     8.4    +      -       -      +
    355F  ILE*     3.5    31.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 345 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    311F  THR*     3.0    35.7    +      -       +      +
    312F  SER*     4.1     7.1    +      -       -      +
    341F  LEU*     3.1    27.8    +      -       +      +
    342F  GLN*     3.2    13.5    +      -       -      +
    344F  LEU*     1.3    76.2    -      -       +      +
    346F  GLN*     1.3    61.0    +      -       -      +
    348F  GLU*     3.2    17.8    +      -       -      +
    349F  GLU*     2.9    30.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 346 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    342F  GLN      3.6     5.3    +      -       -      +
    343F  LYS*     3.3    29.8    +      -       -      +
    344F  LEU      3.1     0.2    -      -       -      -
    345F  GLN*     1.3    80.4    -      -       -      +
    347F  ILE*     1.3    60.0    +      -       +      +
    349F  GLU*     3.5     5.5    +      -       -      +
    350F  GLU*     3.0    31.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 347 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    276F  MET*     3.7    30.1    -      -       +      +
    279F  ARG*     3.8    33.0    -      -       +      +
    280F  VAL*     3.6    31.2    -      -       +      +
    283F  GLN*     5.3     4.3    -      -       +      -
    343F  LYS*     4.0    14.6    -      -       +      +
    344F  LEU*     3.4    13.2    +      -       +      +
    345F  GLN      3.3     0.4    -      -       -      -
    346F  GLN*     1.3    76.0    -      -       +      +
    348F  GLU*     1.3    65.5    +      -       -      +
    350F  GLU*     3.2    12.0    +      -       -      +
    351F  THR*     3.0    26.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 348 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    242F  HIS*     3.6    31.5    +      -       +      +
    280F  VAL*     5.8     0.4    -      -       -      +
    311F  THR*     3.6    31.2    +      -       -      +
    344F  LEU      3.5     8.9    +      -       -      +
    345F  GLN*     3.5    16.7    -      -       -      +
    347F  ILE*     1.3    79.8    -      -       -      +
    349F  GLU*     1.3    56.8    +      -       -      +
    351F  THR*     2.9    19.5    +      -       -      -
    352F  GLY*     2.9    14.4    +      -       -      -
    353F  LEU      3.5    17.6    +      -       -      +
    354F  THR*     4.5     1.9    -      -       -      +
    355F  ILE*     3.4    38.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 349 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    235F  ILE*     3.4    27.9    -      -       -      +
    236F  LYS      4.0     9.5    -      -       -      +
    238F  LYS*     3.3    32.7    -      -       -      +
    242F  HIS*     4.5     7.1    -      -       -      -
    345F  GLN      2.9    16.4    +      -       -      +
    346F  GLN*     3.8     6.5    -      -       -      +
    348F  GLU*     1.3    74.3    -      -       -      +
    350F  GLU*     1.3    64.9    +      -       -      +
    351F  THR      3.4     0.5    +      -       -      -
    352F  GLY*     3.7    10.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 350 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    139F  GLU*     3.1    20.2    -      -       -      +
    276F  MET*     3.4    33.6    -      -       -      +
    279F  ARG*     5.3     0.5    +      -       -      -
    346F  GLN*     3.0    21.3    +      -       +      +
    347F  ILE*     3.2    14.4    +      -       -      +
    349F  GLU*     1.3    79.3    -      -       -      +
    351F  THR*     1.3    60.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 351 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    137F  TYR*     4.4     7.0    -      -       +      +
    138F  PRO*     3.6    17.0    -      -       -      +
    139F  GLU*     3.2    23.7    -      -       -      +
    235F  ILE*     5.6     1.2    -      -       -      +
    276F  MET*     3.7    23.3    -      -       +      -
    347F  ILE*     3.0    16.1    +      -       +      +
    348F  GLU*     2.9    14.4    +      -       -      -
    349F  GLU      4.2     0.4    -      -       -      -
    350F  GLU*     1.3    81.2    -      -       -      +
    352F  GLY*     1.3    65.0    +      -       -      -
    353F  LEU*     3.3    32.4    +      -       -      +
    358F  VAL*     5.6     8.1    -      -       +      +
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


   I  Hydrophilic      - N and O that can donate and accept hydrogen bonds
                         (e.g., oxygen of hydroxyl group of Ser. or Thr)
  II  Acceptor         - N or O that can only accept a hydrogen bond
 III  Donor            - N that can only donate a hydrogen bond
  IV  Hydrophobic      - Cl, Br, I and all C atoms that are not in
                         aromatic rings and do not have a covalent bond to
                         a N or O atom
   V  Aromatic         - C in aromatic rings irrespective of any other 
                         bonds formed by the atom
  VI  Neutral          - C atoms that have a covalent bond to at least one
                         atom of class I or two or more atoms from class II
                         or III; atoms; S, F, P, and metal atoms in all cases
 VII  Neutral-donor    - C atoms that have a covalent bond with only one
                         atom of class III
VIII  Neutral-acceptor - C atoms that have a covalent bond with only 
                         one atom of class II
For each pair of contacts the state of legitimacy is shown below:

Legend:
+, legitimate
-, illegitimate
------------------------------------------------------------
  Atomic class           I  II  III   IV   V   VI  VII  VIII
------------------------------------------------------------
   I  (Hydrophilic)      +   +    +    -   +   +    +    +
  II  (Acceptor)         +   -    +    -   +   +    +    -
 III  (Donor)            +   +    -    -   +   +    -    +
  IV  (Hydrophobic)      -   -    -    +   +   +    +    +
   V  (Aromatic)         +   +    +    +   +   +    +    +
  VI  (Neutral)          +   +    +    +   +   +    +    +
 VII  (Neutral-donor)    +   +    -    +   +   +    -    +
VIII  (Neutral-acceptor) +   -    +    +   +   +    +    -
------------------------------------------------------------
Warning!
Atom classes for heterogroups are automatically assigned based on the atomic coordinates. However, in three cases (see below) the automatic assignment is currently ambiguous. In these cases, the user is advised to manually analyse the full list of contacts using LPC software.
1. Carbon atoms belonging to a 4-, 5- or 6-member ring are 
   considered "aromatic" (Class V) if the ring is approximately
   planar, and "hydrophobic" (Class IV) or "neutral" (Classes
   VI, VII, VIII) if the ring is non-planar.
2. The oxygen atom of a carbonyl or hydroxy group is considered
   "hydroxy" (Class I) if the CO bond is longer than 1.29 Å, and
   "carbonyl" (Class II) if shorter.
3. All nitrogen atoms are considered "hydrophilic" (Class I).

Please E-mail any questions and/or suggestions concerning this page to Vladimir.Sobolev@weizmann.ac.il