Contacts of the helix formed by residues 436 - 463 (chain A) in PDB entry 5XA0


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 SER 436 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    384A  ARG*     6.4     0.7    -      -       -      +
    434A  PRO      3.8     2.9    +      -       -      -
    435A  VAL*     1.4    72.6    -      -       -      +
    437A  PRO*     1.3    62.8    -      -       -      +
    438A  ALA*     3.6     6.9    +      -       -      +
    439A  GLU*     2.8    40.1    +      -       -      +
    440A  VAL*     2.7    31.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with PRO 437 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    238A  ASP*     5.7     5.8    -      -       -      +
    384A  ARG*     6.4     0.4    -      -       -      +
    435A  VAL      3.9     5.8    -      -       -      +
    436A  SER*     1.3    81.7    -      -       -      +
    438A  ALA*     1.3    61.6    +      -       -      +
    440A  VAL*     4.1     7.9    -      -       +      -
    441A  ARG*     2.7    60.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 438 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    436A  SER*     3.3     6.4    +      -       -      +
    437A  PRO*     1.3    78.1    -      -       -      +
    439A  GLU*     1.3    57.9    +      -       -      +
    441A  ARG*     4.7     2.0    -      -       -      +
    442A  ASP*     2.4    46.2    +      -       -      +
    506A  ARG*     5.0     7.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 439 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    241A  ARG*     5.4     7.9    +      -       -      -
    275A  ALA*     4.2    19.7    -      -       -      +
    435A  VAL*     5.1     5.1    -      -       +      +
    436A  SER*     2.8    35.2    +      -       -      +
    438A  ALA*     1.3    74.3    -      -       -      +
    440A  VAL*     1.4    56.4    +      -       +      +
    442A  ASP*     4.2     4.7    -      -       -      +
    443A  LEU*     2.9    38.2    +      -       +      +
    505A  GLU*     4.1    33.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 440 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    239A  VAL*     4.5     9.2    -      -       +      -
    281A  LEU*     5.9     4.0    -      -       +      -
    308A  LEU*     6.4     1.6    -      -       +      -
    435A  VAL*     3.2    34.8    -      -       +      +
    436A  SER      2.7    36.5    +      -       -      +
    437A  PRO*     4.1     5.6    -      -       +      +
    439A  GLU*     1.4    71.6    -      -       -      +
    441A  ARG*     1.3    61.2    +      -       +      +
    443A  LEU*     4.5     3.8    -      -       +      -
    444A  ASP*     2.8    30.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 441 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     32A  LEU*     4.8     3.4    -      -       -      +
    126A  LEU      4.9     0.6    +      -       -      -
    127A  LYS      5.1     5.3    +      -       -      -
    128A  SER*     3.8    12.5    +      -       -      +
    129A  ASN*     2.1    57.2    +      -       -      +
    437A  PRO*     2.7    38.8    +      -       +      +
    438A  ALA*     4.3     1.8    -      -       -      +
    440A  VAL*     1.3    72.2    -      -       +      +
    442A  ASP*     1.3    67.0    +      -       -      +
    444A  ASP*     3.4     6.9    -      -       -      +
    445A  PHE*     2.9    26.9    +      -       -      +
    483A  PHE*     4.7     1.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 442 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    438A  ALA*     2.4    32.8    +      -       -      +
    439A  GLU*     4.2     3.7    -      -       -      +
    441A  ARG*     1.3    77.6    -      -       -      +
    443A  LEU*     1.3    61.5    +      -       -      +
    445A  PHE*     2.8    18.5    +      -       -      +
    446A  ALA      3.0     6.2    +      -       -      -
    483A  PHE*     3.5    24.0    -      -       +      -
    505A  GLU*     5.1     7.3    -      -       +      +
    506A  ARG*     2.5    47.7    +      -       -      +
    509A  LEU*     3.0    18.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 443 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    278A  SER*     4.6    21.1    -      -       -      -
    281A  LEU*     4.8    17.0    -      -       +      -
    439A  GLU*     2.9    30.7    +      -       +      +
    440A  VAL*     4.4     3.8    -      -       +      +
    442A  ASP*     1.3    67.3    -      -       -      +
    444A  ASP*     1.3    66.8    +      -       -      +
    445A  PHE      2.9     1.2    +      -       -      -
    446A  ALA      3.0     1.6    +      -       -      -
    447A  ASN*     3.0     6.5    +      -       -      +
    509A  LEU*     3.1    18.2    -      -       +      +
    513A  GLN*     2.3    63.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 444 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     32A  LEU*     2.9    23.1    -      -       +      +
    440A  VAL*     2.8    26.7    +      -       +      +
    441A  ARG*     3.4     9.2    -      -       -      +
    443A  LEU*     1.3    73.9    -      -       -      +
    445A  PHE*     1.3    63.5    +      -       -      +
    447A  ASN*     3.1    11.3    +      -       -      +
    448A  ASP*     3.0    15.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 445 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     32A  LEU*     2.5    35.2    -      -       +      -
    441A  ARG      2.9    10.3    +      -       -      +
    442A  ASP      2.8    17.7    +      -       -      +
    444A  ASP*     1.3    66.6    -      -       -      +
    446A  ALA*     1.3    69.4    +      -       -      +
    447A  ASN      2.9     2.9    +      -       -      -
    448A  ASP      3.0     1.0    +      -       -      -
    449A  ALA*     2.9    37.1    +      -       +      +
    476A  LEU*     4.8     9.9    -      -       +      -
    479A  ASP*     4.8    14.6    -      -       +      -
    480A  LEU*     4.6    14.6    -      -       +      -
    483A  PHE*     3.1    59.2    -      +       +      -
    515A  ILE*     5.6     0.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 446 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    442A  ASP      3.0     6.5    +      -       -      -
    443A  LEU      3.0     0.2    +      -       -      -
    445A  PHE*     1.3    76.5    -      -       -      +
    447A  ASN*     1.3    50.7    +      -       -      +
    450A  SER*     2.5    30.1    +      -       -      -
    483A  PHE*     4.8     1.9    -      -       +      -
    509A  LEU*     2.9    33.9    -      -       +      -
    513A  GLN*     2.6    21.7    +      -       +      +
    514A  ASN      3.4     3.1    -      -       -      +
    515A  ILE*     2.8    36.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 447 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    443A  LEU*     3.9     7.3    +      -       -      +
    444A  ASP*     3.3    13.1    -      -       -      +
    445A  PHE      2.9     2.4    +      -       -      -
    446A  ALA*     1.3    70.5    -      -       -      +
    448A  ASP*     1.3    52.2    +      -       -      +
    450A  SER*     1.8    37.4    +      -       -      -
    451A  LYS*     2.1    24.7    +      -       +      +
    513A  GLN*     2.0    49.0    +      -       -      +
    514A  ASN*     4.7     1.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 448 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     30A  LEU      4.6     2.1    -      -       -      +
     31A  GLY*     2.8    12.5    -      -       -      -
     32A  LEU*     2.1    52.3    +      -       +      +
     33A  VAL*     2.6    38.9    -      -       -      +
    444A  ASP*     3.0     7.0    +      -       -      +
    445A  PHE      3.0     2.0    +      -       -      -
    447A  ASN*     1.3    73.3    -      -       -      +
    449A  ALA*     1.3    73.5    +      -       -      +
    451A  LYS*     2.6    30.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 449 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     33A  VAL*     3.6     1.6    -      -       -      +
    445A  PHE*     2.9    30.9    +      -       +      +
    448A  ASP*     1.3    76.1    -      -       -      +
    450A  SER*     1.3    53.6    +      -       -      +
    452A  VAL*     2.5    34.2    -      -       -      +
    453A  LEU*     2.5    22.9    -      -       +      +
    476A  LEU*     4.1     9.2    -      -       +      -
    480A  LEU*     4.7     4.0    -      -       +      -
    515A  ILE*     3.1    31.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 450 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    446A  ALA      2.5    11.2    +      -       -      -
    447A  ASN*     1.8    43.1    +      -       -      -
    449A  ALA*     1.3    70.7    -      -       -      +
    451A  LYS*     1.3    70.4    +      -       -      -
    452A  VAL      2.8     1.2    +      -       -      -
    453A  LEU*     2.9    11.6    -      -       -      +
    454A  GLY*     3.9     0.2    -      -       -      -
    513A  GLN*     3.5     0.2    +      -       -      -
    514A  ASN*     2.7    40.3    +      -       -      +
    518A  GLN*     2.0    29.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 451 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     33A  VAL*     2.9    22.7    -      -       +      -
     34A  ASP*     5.1     1.3    -      -       -      +
    447A  ASN*     2.1    37.1    +      -       +      +
    448A  ASP*     2.6    50.3    +      -       -      +
    450A  SER*     1.3    82.6    +      -       -      +
    452A  VAL*     1.3    66.1    +      -       -      +
    454A  GLY*     3.4     1.0    +      -       -      -
    455A  SER*     3.0    21.1    +      -       -      -
    514A  ASN*     5.3     0.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 452 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     33A  VAL*     2.8    41.8    -      -       +      +
     34A  ASP*     5.9     0.4    -      -       -      +
    448A  ASP      3.0     2.6    +      -       -      -
    449A  ALA*     2.5    45.6    +      -       -      +
    451A  LYS*     1.3    78.7    -      -       -      +
    453A  LEU*     1.3    53.5    +      -       -      +
    455A  SER*     2.5    23.8    +      -       -      -
    456A  ILE*     2.9    27.8    +      -       +      -
    472A  SER*     5.2     5.8    -      -       -      +
    473A  VAL*     5.7     0.2    -      -       -      -
    476A  LEU*     2.9    38.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 453 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    449A  ALA*     2.5    34.1    -      -       +      +
    450A  SER*     2.9    15.3    -      -       -      +
    452A  VAL*     1.3    78.2    -      -       -      +
    454A  GLY*     1.3    53.5    +      -       -      +
    456A  ILE*     4.2     8.7    -      -       -      -
    457A  ALA      2.7    17.0    +      -       -      -
    476A  LEU*     3.4    27.6    -      -       +      -
    477A  LEU*     5.5     2.5    -      -       +      -
    480A  LEU*     4.0    10.3    -      -       +      -
    514A  ASN      3.5     2.2    -      -       -      +
    515A  ILE*     4.5     2.5    -      -       -      +
    518A  GLN*     2.8    31.0    -      -       +      +
    519A  ILE*     3.6    20.4    -      -       +      -
    522A  LEU*     2.5    45.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 454 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    450A  SER      3.0     2.5    +      -       -      -
    451A  LYS*     4.0     1.3    -      -       -      -
    452A  VAL      2.7     4.6    +      -       -      -
    453A  LEU*     1.3    64.1    -      -       -      +
    455A  SER*     1.4    45.7    -      -       -      +
    458A  GLY*     3.2     6.2    +      -       -      -
    459A  LYS*     1.7    35.5    +      -       -      -
    518A  GLN*     1.8    36.2    +      -       -      -
    521A  LYS*     5.4     0.9    -      -       -      -
    522A  LEU*     3.4     4.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 455 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    202A  ASP*     5.6     2.3    +      -       -      -
    451A  LYS*     3.0    13.6    +      -       -      -
    452A  VAL*     2.5    18.3    +      -       -      -
    454A  GLY*     1.4    65.2    -      -       -      -
    456A  ILE*     1.4    49.9    -      -       -      +
    459A  LYS*     2.2    42.4    -      -       -      +
    469A  GLU*     4.3    11.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 456 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    452A  VAL*     2.9    55.9    +      -       +      +
    453A  LEU*     3.9     7.4    -      -       -      +
    455A  SER*     1.4    75.4    -      -       -      +
    457A  ALA*     1.4    51.1    +      -       -      +
    459A  LYS*     2.5    28.9    -      -       +      +
    460A  LEU*     3.1    15.4    +      -       -      +
    465A  ILE*     4.0    16.9    -      -       +      +
    469A  GLU*     5.0    11.9    -      -       +      +
    472A  SER      5.7     0.2    -      -       -      -
    473A  VAL*     3.4    48.0    -      -       +      +
    476A  LEU*     4.1     4.0    -      -       +      -
    477A  LEU*     5.7     0.9    -      -       +      -
    522A  LEU*     5.9     0.9    -      -       +      -
    552A  ILE*     6.0     1.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 457 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    453A  LEU      2.7     6.5    +      -       -      -
    456A  ILE*     1.4    64.6    -      -       -      +
    458A  GLY*     1.4    59.6    +      -       -      +
    459A  LYS*     2.4    12.7    -      -       -      +
    460A  LEU*     2.3    34.4    +      -       -      +
    461A  GLU*     2.9    12.4    +      -       -      -
    521A  LYS      3.9     4.7    -      -       -      +
    522A  LEU*     2.7    59.5    -      -       +      +
    524A  GLN      5.8     2.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 458 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    454A  GLY      3.2     3.8    +      -       -      -
    457A  ALA*     1.4    67.4    -      -       -      +
    459A  LYS*     1.4    84.8    +      -       -      +
    461A  GLU*     3.3     7.6    +      -       -      +
    462A  LYS*     2.9    35.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 459 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    454A  GLY      1.7    41.0    +      -       -      -
    455A  SER*     2.2    36.6    -      -       -      +
    456A  ILE*     2.5    30.0    -      -       +      +
    457A  ALA      2.4    18.7    -      -       -      +
    458A  GLY*     1.4    86.3    -      -       -      +
    460A  LEU*     1.3    49.7    +      -       -      +
    462A  LYS*     2.6    26.7    +      -       -      +
    463A  GLY*     2.4    35.8    +      -       -      +
    464A  THR      4.6    13.2    -      -       -      +
    465A  ILE*     5.0     7.0    -      -       +      -
    469A  GLU*     4.8    11.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 460 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    456A  ILE      3.1    14.6    +      -       -      +
    457A  ALA*     2.3    28.3    +      -       -      +
    459A  LYS*     1.3    72.6    -      -       -      +
    461A  GLU*     1.3    64.1    +      -       -      +
    462A  LYS      3.1     0.9    +      -       -      -
    463A  GLY*     3.5    22.9    +      -       -      +
    465A  ILE*     4.9    16.6    -      -       +      +
    522A  LEU      5.3     2.5    -      -       -      +
    524A  GLN      3.6    26.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 461 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    457A  ALA      2.9    10.5    +      -       -      +
    458A  GLY*     3.8     9.6    -      -       -      +
    460A  LEU*     1.3    81.2    -      -       -      +
    462A  LYS*     1.3    64.2    +      -       +      +
    524A  GLN      4.6    13.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 462 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    458A  GLY*     2.9    19.0    +      -       -      +
    459A  LYS*     2.6    40.1    +      -       -      +
    461A  GLU*     1.3    78.1    -      -       +      +
    463A  GLY*     1.3    54.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 463 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    459A  LYS*     2.4    23.4    +      -       -      +
    460A  LEU*     3.5    19.9    +      -       -      +
    462A  LYS*     1.3    73.2    -      -       -      +
    464A  THR*     1.3    59.9    +      -       -      -
----------------------------------------------------------
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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