Contacts of the helix formed by residues 289 - 318 (chain B) in PDB entry 3TKL


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 ASP 289 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    103A  LYS*     2.8    23.3    +      -       -      -
    286B  HIS*     2.9    21.5    +      -       +      +
    287B  LYS      3.7     0.2    +      -       -      -
    288B  GLY*     1.3    74.8    -      -       -      +
    290B  GLU*     1.3    62.9    +      -       -      +
    291B  LYS*     3.3     9.2    +      -       -      +
    292B  THR*     2.8    41.3    +      -       -      +
    293B  VAL*     3.0    22.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 290 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    288B  GLY*     3.4    24.1    +      -       -      +
    289B  ASP*     1.3    74.8    +      -       -      +
    291B  LYS*     1.3    58.7    +      -       +      +
    293B  VAL*     4.1    19.5    -      -       -      +
    294B  GLN*     2.8    56.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 291 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    103A  LYS*     6.3     0.2    -      -       -      +
    289B  ASP*     3.1     7.6    +      -       -      +
    290B  GLU*     1.3    77.4    -      -       +      +
    292B  THR*     1.3    68.5    +      -       +      +
    294B  GLN*     3.3    31.8    +      -       -      +
    295B  SER*     3.1    22.0    +      -       -      -
    298B  ARG*     5.2     0.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with THR 292 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    103A  LYS*     3.7     8.7    -      -       -      +
    104A  GLN*     4.4     8.5    -      -       -      +
    107A  GLN*     3.2    37.2    -      -       -      +
    286B  HIS*     3.3    27.5    -      -       -      +
    289B  ASP*     2.8    31.6    +      -       -      +
    291B  LYS*     1.3    75.6    -      -       +      +
    293B  VAL*     1.3    67.1    +      -       -      +
    295B  SER*     3.0    10.0    +      -       -      -
    296B  LEU*     2.8    29.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 293 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    283B  MET*     4.0    16.6    -      -       +      +
    286B  HIS*     3.4    36.1    -      -       +      +
    287B  LYS*     4.0    11.0    -      -       +      +
    288B  GLY      4.5     1.8    -      -       -      +
    289B  ASP      3.0    12.8    +      -       -      +
    290B  GLU*     4.1    19.3    -      -       -      +
    292B  THR*     1.3    80.9    +      -       -      +
    294B  GLN*     1.3    58.4    +      -       +      +
    296B  LEU*     3.3     8.8    +      -       -      +
    297B  GLN*     3.0    53.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 294 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    290B  GLU*     2.8    54.5    +      -       +      +
    291B  LYS*     3.6    27.0    -      -       -      +
    293B  VAL*     1.3    76.0    -      -       +      +
    295B  SER*     1.3    62.1    +      -       -      +
    297B  GLN*     3.5    16.4    +      -       -      +
    298B  ARG*     3.1    44.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 295 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    104A  GLN*     6.1     1.4    -      -       -      +
    107A  GLN*     4.9     3.5    +      -       -      -
    291B  LYS      3.1     9.2    +      -       -      -
    292B  THR*     3.0    23.9    +      -       -      -
    294B  GLN*     1.3    73.6    -      -       -      +
    296B  LEU*     1.3    68.4    +      -       -      +
    298B  ARG*     3.2    26.6    +      -       -      +
    299B  GLU*     3.0    26.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 296 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    107A  GLN*     5.1    13.7    -      -       +      +
    111A  ARG*     5.9     2.5    -      -       +      -
    279B  LEU*     4.0    24.4    -      -       +      +
    282B  LEU*     3.8    45.1    -      -       +      +
    283B  MET*     3.8    19.3    -      -       +      +
    286B  HIS*     4.3     7.0    -      -       +      -
    292B  THR*     2.8    38.7    +      -       -      +
    293B  VAL*     3.7     6.5    -      -       -      +
    295B  SER*     1.3    74.5    +      -       -      +
    297B  GLN*     1.3    57.5    +      -       -      +
    299B  GLU*     3.3     9.3    +      -       +      +
    300B  HIS*     2.9    29.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 297 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    283B  MET*     3.8    20.3    -      -       -      +
    293B  VAL*     3.0    39.1    +      -       +      +
    294B  GLN*     3.6    18.2    -      -       -      +
    295B  SER      3.2     0.2    -      -       -      -
    296B  LEU*     1.3    72.9    -      -       -      +
    298B  ARG*     1.3    61.3    +      -       -      +
    300B  HIS*     3.7     6.4    -      -       -      +
    301B  HIS*     2.9    31.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 298 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    291B  LYS      5.2     0.8    +      -       -      -
    294B  GLN*     3.1    43.7    +      -       -      +
    295B  SER*     3.4    32.0    -      -       -      +
    297B  GLN*     1.3    77.3    -      -       -      +
    299B  GLU*     1.3    63.6    +      -       +      +
    301B  HIS*     3.5     6.0    +      -       -      +
    302B  ASP*     3.1    33.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 299 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    111A  ARG*     3.4    32.7    +      -       -      +
    279B  LEU*     4.0    17.3    -      -       +      -
    295B  SER*     3.0    18.9    +      -       -      +
    296B  LEU*     3.3    11.6    +      -       +      +
    298B  ARG*     1.3    75.2    -      -       -      +
    300B  HIS*     1.3    58.8    +      -       -      +
    302B  ASP*     3.1    14.5    +      -       -      +
    303B  ILE*     2.9    34.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 300 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    276B  SER*     3.0    45.8    +      -       -      -
    279B  LEU*     3.7     9.8    -      -       +      +
    280B  THR*     3.8    12.5    +      -       -      -
    283B  MET*     3.5    25.4    -      -       +      +
    296B  LEU      2.9    16.3    +      -       -      +
    297B  GLN*     3.3     5.8    +      -       -      +
    299B  GLU*     1.3    77.5    -      -       -      +
    301B  HIS*     1.3    59.3    +      -       -      +
    303B  ILE*     3.3     2.8    +      -       -      +
    304B  LYS*     2.9    43.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with HIS 301 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    297B  GLN      2.9    17.9    +      -       -      +
    298B  ARG*     3.7     7.9    -      -       -      +
    300B  HIS*     1.3    79.1    +      -       -      +
    302B  ASP*     1.3    69.8    +      -       -      +
    304B  LYS*     3.4    30.5    +      -       -      +
    305B  ALA*     3.1    27.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 302 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    298B  ARG*     3.1    20.8    +      -       -      +
    299B  GLU*     3.1    20.7    +      -       -      +
    301B  HIS*     1.3    87.0    +      -       -      +
    303B  ILE*     1.3    63.7    +      -       +      +
    305B  ALA*     3.2     6.7    +      -       -      +
    306B  LYS*     3.1    35.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 303 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    111A  ARG*     3.9    12.6    -      -       -      +
    272B  PHE*     3.4    58.5    -      -       +      +
    275B  ASP*     3.4    23.6    -      -       -      +
    276B  SER*     4.2    13.2    -      -       -      +
    279B  LEU*     4.1     6.7    -      -       +      -
    299B  GLU*     2.9    22.1    +      -       -      +
    300B  HIS*     3.8     6.1    -      -       -      +
    302B  ASP*     1.3    77.0    -      -       +      +
    304B  LYS*     1.3    57.4    +      -       -      +
    306B  LYS*     3.2    12.1    +      -       +      +
    307B  LEU*     2.9    29.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 304 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    276B  SER*     5.8     2.0    -      -       -      +
    300B  HIS*     2.9    33.1    +      -       +      +
    301B  HIS*     3.7    32.3    +      -       -      +
    302B  ASP      3.3     0.2    -      -       -      -
    303B  ILE*     1.3    76.9    -      -       -      +
    305B  ALA*     1.3    56.1    +      -       -      +
    307B  LEU*     3.4    12.7    +      -       +      +
    308B  ALA*     3.0    28.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 305 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    301B  HIS*     3.1    22.7    +      -       +      +
    302B  ASP*     3.2     9.8    +      -       -      +
    304B  LYS*     1.3    77.0    -      -       -      +
    306B  LYS*     1.3    58.7    +      -       +      +
    308B  ALA*     3.4     6.8    +      -       -      +
    309B  ASN*     3.0    37.6    +      -       -      +
    392B  GLU*     5.9     0.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 306 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    272B  PHE*     4.0    32.7    -      -       +      -
    302B  ASP*     3.1    26.5    +      -       -      +
    303B  ILE*     3.2    12.5    +      -       +      +
    305B  ALA*     1.3    73.2    -      -       +      +
    307B  LEU*     1.3    60.8    +      -       -      +
    309B  ASN*     3.2     2.9    +      -       -      +
    310B  LEU*     2.9    35.6    +      -       -      +
    392B  GLU*     3.8    36.0    +      -       -      +
    395B  ILE*     5.4     5.7    -      -       -      +
    396B  HIS*     4.4    17.4    +      -       +      +
    442B  GLN*     5.1    13.9    +      -       -      +
    445B  LEU*     5.3     3.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 307 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    269B  MET*     3.6    49.9    -      -       +      +
    272B  PHE*     3.6    32.5    -      -       +      +
    273B  SER*     3.8    14.8    -      -       -      +
    276B  SER*     4.7     6.5    -      -       -      -
    303B  ILE*     2.9    16.1    +      -       +      +
    304B  LYS*     3.4    14.6    -      -       +      +
    306B  LYS*     1.3    76.3    -      -       -      +
    308B  ALA*     1.3    57.0    +      -       -      +
    310B  LEU*     3.2     8.1    +      -       -      +
    311B  GLN*     2.9    28.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 308 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    304B  LYS*     3.0    18.4    +      -       +      +
    305B  ALA*     3.7     8.1    -      -       -      +
    307B  LEU*     1.3    75.2    -      -       -      +
    309B  ASN*     1.3    65.1    +      -       -      +
    311B  GLN*     3.4     9.8    +      -       -      +
    312B  VAL*     3.2    25.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 309 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    305B  ALA*     3.0    25.6    +      -       -      +
    306B  LYS      3.2     3.6    +      -       -      +
    308B  ALA*     1.3    76.6    -      -       -      +
    310B  LEU*     1.3    65.6    +      -       +      +
    312B  VAL*     3.3    12.8    +      -       -      +
    313B  LEU*     3.5    15.5    +      -       -      +
    385B  ASP*     5.0     6.5    -      -       -      +
    388B  THR*     3.8    15.1    -      -       -      +
    389B  ILE*     3.5    32.9    -      -       +      +
    392B  GLU*     2.7    37.0    +      -       +      +
    396B  HIS*     6.3     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 310 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    260B  LEU*     4.3    15.7    -      -       +      -
    265B  ILE*     3.8    17.8    -      -       +      +
    268B  LYS*     3.7    22.0    -      -       +      -
    269B  MET*     3.5    24.7    -      -       +      -
    272B  PHE*     3.4    38.8    -      -       +      -
    306B  LYS      2.9    13.5    +      -       -      +
    307B  LEU*     3.5     5.6    -      -       -      +
    309B  ASN*     1.3    76.1    -      -       +      +
    311B  GLN*     1.3    56.9    +      -       -      +
    313B  LEU*     3.2    14.2    +      -       +      +
    314B  HIS*     2.9    26.0    +      -       -      +
    396B  HIS*     3.9    24.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 311 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    269B  MET*     3.5    21.5    -      -       +      +
    307B  LEU      2.9    13.6    +      -       -      +
    308B  ALA*     3.6    13.7    -      -       -      +
    309B  ASN      3.3     0.2    -      -       -      -
    310B  LEU*     1.3    76.2    -      -       -      +
    312B  VAL*     1.3    57.7    +      -       +      +
    314B  HIS*     3.2    21.0    +      -       -      +
    315B  ASP*     2.8    65.8    +      -       -      +
    320B  LYS*     5.8     1.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 312 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    308B  ALA      3.2    16.8    +      -       -      +
    309B  ASN*     3.5     8.7    -      -       -      +
    310B  LEU      3.2     0.8    -      -       -      -
    311B  GLN*     1.3    76.8    -      -       +      +
    313B  LEU*     1.3    60.7    +      -       +      +
    315B  ASP*     3.3    10.5    +      -       -      +
    316B  ALA*     2.9    26.3    +      -       +      +
    321B  LYS*     4.0    28.9    -      -       +      +
    323B  TYR*     6.0     0.4    -      -       +      -
    340B  ALA*     4.2    15.7    -      -       +      -
    386B  LEU*     5.1     3.6    -      -       +      -
    389B  ILE*     3.8    27.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 313 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    259B  GLU*     6.0     0.2    -      -       -      +
    260B  LEU*     4.0    28.7    -      -       +      -
    265B  ILE*     3.7    15.5    -      -       +      -
    309B  ASN      3.5     4.7    +      -       -      +
    310B  LEU*     3.2    15.1    +      -       +      +
    312B  VAL*     1.3    77.3    -      -       +      +
    314B  HIS*     1.3    59.6    +      -       -      +
    316B  ALA*     3.3     3.2    +      -       -      +
    317B  HIS*     2.7    41.3    +      -       +      +
    323B  TYR*     3.7    21.3    -      -       +      +
    334B  LEU*     4.1    18.2    -      -       +      -
    386B  LEU*     5.6     0.4    -      -       +      -
    389B  ILE*     3.4    35.0    -      -       +      -
    393B  ALA*     4.2    11.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with HIS 314 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    262B  LEU*     3.8    15.7    -      -       +      +
    265B  ILE*     4.2    14.5    -      -       +      +
    266B  ASN*     3.3    28.6    +      -       -      -
    269B  MET*     4.3     9.0    -      -       -      -
    310B  LEU      2.9    12.2    +      -       -      +
    311B  GLN*     3.3    28.7    +      -       -      +
    312B  VAL      3.2     0.2    -      -       -      -
    313B  LEU*     1.3    74.2    -      -       -      +
    315B  ASP*     1.3    66.8    +      -       -      +
    317B  HIS*     3.0     7.3    +      -       -      +
    318B  THR*     2.9    49.0    +      -       +      +
    320B  LYS*     5.7     3.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 315 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    311B  GLN*     2.8    51.7    +      -       -      +
    312B  VAL*     3.3     7.0    +      -       -      +
    314B  HIS*     1.3    71.8    +      -       -      +
    316B  ALA*     1.3    57.9    +      -       -      +
    318B  THR*     3.2     7.4    +      -       -      -
    319B  GLY      2.9     9.4    +      -       -      -
    320B  LYS*     2.9    57.1    +      -       +      +
    321B  LYS*     3.2    29.3    +      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 316 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    312B  VAL      2.9    16.3    +      -       -      +
    313B  LEU*     3.6     4.7    -      -       -      +
    314B  HIS      3.1     0.2    -      -       -      -
    315B  ASP*     1.3    75.8    -      -       -      +
    317B  HIS*     1.3    63.9    +      -       -      +
    318B  THR      3.4     0.3    +      -       -      -
    319B  GLY*     3.5     8.1    +      -       -      -
    321B  LYS*     3.6    24.0    -      -       +      +
    322B  SER*     5.8     0.2    -      -       -      -
    323B  TYR*     3.4    44.9    -      -       +      +
    340B  ALA*     5.3     1.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with HIS 317 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    259B  GLU*     4.0    19.9    +      -       -      +
    260B  LEU*     3.3    20.4    +      -       +      -
    261B  SER*     4.6     1.0    -      -       -      -
    262B  LEU*     4.2    37.5    -      -       +      -
    265B  ILE*     3.7    17.0    -      -       +      +
    313B  LEU*     2.7    33.5    +      -       +      +
    314B  HIS*     3.6     4.9    -      -       -      +
    316B  ALA*     1.3    80.0    -      -       -      +
    318B  THR*     1.3    60.9    +      -       +      +
    319B  GLY      3.5     0.4    +      -       -      -
    323B  TYR*     4.4    10.1    -      +       -      -
----------------------------------------------------------
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Residues in contact with THR 318 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    262B  LEU*     5.2     7.2    -      -       +      -
    314B  HIS*     2.9    42.1    +      -       +      +
    315B  ASP*     3.2    11.6    +      -       -      -
    317B  HIS*     1.3    82.7    -      -       +      +
    319B  GLY*     1.3    57.9    +      -       -      +
    320B  LYS*     3.3    28.1    +      -       -      +
----------------------------------------------------------
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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