Contacts of the helix formed by residues 402 - 426 (chain A) in PDB entry 2ACZ


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 GLY 402 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     52A  GLY      3.7    16.0    -      -       -      +
     53A  ILE*     3.8     3.1    -      -       -      -
     54A  THR*     3.2    32.3    +      -       -      -
    126A  PHE*     4.1     4.7    -      -       -      -
    399A  ARG*     3.4     0.6    -      -       -      +
    401A  GLY*     1.3    71.6    -      -       -      -
    403A  ASN*     1.3    61.3    +      -       -      +
    405A  LEU      4.1     0.2    +      -       -      -
    406A  LEU*     4.0     6.4    +      -       -      +
    589A  OAA      2.9    17.1    +      -       -      -
    601A  FAD      3.4    15.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 403 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     54A  THR*     2.4    33.7    +      -       -      -
     68A  HIS*     3.2    19.5    +      -       -      -
     72A  THR*     3.1    29.1    -      -       -      +
     88A  MET*     3.9    12.2    -      -       +      +
    395A  HIS*     3.9    19.7    +      -       +      +
    399A  ARG*     4.5     0.2    -      -       -      +
    400A  LEU*     3.0    27.8    +      -       -      +
    401A  GLY      4.4     0.8    +      -       -      -
    402A  GLY*     1.3    77.5    -      -       -      +
    404A  SER*     1.3    54.5    +      -       -      +
    406A  LEU*     3.0     8.8    +      -       -      +
    407A  ASP*     2.7    34.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 404 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    355A  TYR*     3.2     7.7    +      -       -      -
    395A  HIS*     4.1     7.2    -      -       -      -
    399A  ARG*     3.2    38.5    -      -       -      +
    403A  ASN*     1.3    75.0    -      -       -      +
    405A  LEU*     1.3    50.4    +      -       -      +
    407A  ASP*     2.8     6.8    +      -       -      +
    408A  LEU*     2.7    36.7    +      -       -      +
    601A  FAD      2.7    47.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 405 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46A  THR*     4.1    15.9    -      -       +      -
     49A  ALA*     4.1    16.6    -      -       +      -
     52A  GLY      3.6    12.3    -      -       -      +
     53A  ILE*     3.4    38.1    -      -       +      -
    141A  THR*     4.2    10.3    -      -       +      -
    142A  GLY*     4.5     5.4    -      -       -      +
    145A  LEU*     4.9     8.0    -      -       +      +
    402A  GLY      4.3     2.7    -      -       -      +
    404A  SER*     1.3    71.5    +      -       -      +
    406A  LEU*     1.3    63.8    +      -       -      +
    408A  LEU*     3.0    43.5    +      -       +      +
    409A  VAL*     3.1    11.7    +      -       -      +
    601A  FAD      2.7    39.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 406 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     53A  ILE*     4.2     8.0    -      -       +      +
     54A  THR      3.0    26.0    -      -       -      +
     55A  VAL*     4.2     7.9    -      -       +      -
     68A  HIS*     3.6    21.5    -      -       +      -
     88A  MET*     4.0    27.4    -      -       +      +
     89A  CYS*     5.2     0.4    -      -       -      -
     92A  GLY*     3.9    13.2    -      -       -      -
     96A  ILE*     4.2    22.9    -      -       +      -
    402A  GLY      4.0     2.7    +      -       -      +
    403A  ASN*     3.0    15.7    +      -       -      +
    405A  LEU*     1.3    78.6    -      -       -      +
    407A  ASP*     1.3    63.7    +      -       -      +
    409A  VAL*     3.5     0.9    +      -       -      +
    410A  VAL*     3.0    54.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 407 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     88A  MET*     4.1     7.6    -      -       -      -
    355A  TYR*     4.0     2.3    +      -       -      -
    387A  GLY*     2.7    33.6    +      -       -      +
    392A  VAL*     4.5     7.3    -      -       -      +
    394A  VAL*     4.5     6.4    -      -       -      +
    395A  HIS*     3.8    24.5    +      -       +      +
    403A  ASN      2.7    15.6    +      -       -      +
    404A  SER      2.9    12.3    -      -       -      +
    406A  LEU*     1.3    70.3    -      -       -      +
    408A  LEU*     1.3    70.1    +      -       -      +
    409A  VAL      3.1     0.3    +      -       -      -
    411A  PHE*     2.9    57.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 408 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     17A  GLY*     3.5    25.4    -      -       -      -
     18A  ALA*     3.6    31.6    -      -       +      +
     46A  THR*     4.0     5.8    -      -       +      -
    145A  LEU*     5.0     3.6    -      -       +      -
    387A  GLY*     4.0    15.2    +      -       -      -
    404A  SER*     2.7    22.9    +      -       -      +
    405A  LEU*     3.0    34.5    +      -       +      +
    407A  ASP*     1.3    71.7    -      -       -      +
    409A  VAL*     1.3    56.9    +      -       +      +
    412A  GLY*     2.8    34.8    +      -       -      -
    601A  FAD      3.4    37.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 409 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     17A  GLY      5.2     1.8    -      -       -      +
     21A  ARG*     3.6    34.7    -      -       +      +
     95A  ALA*     4.0    22.2    -      -       +      +
     96A  ILE*     4.8     6.3    -      -       +      -
     98A  GLU*     4.8     0.7    -      -       -      +
     99A  LEU*     3.7    36.8    -      -       +      -
    145A  LEU*     4.1    14.8    -      -       +      -
    149A  LEU*     5.2     2.2    -      -       +      -
    405A  LEU      3.1    12.9    +      -       -      +
    406A  LEU      4.1     2.0    -      -       -      +
    408A  LEU*     1.3    80.0    -      -       +      +
    410A  VAL*     1.3    60.5    +      -       +      +
    413A  ARG*     2.8    36.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 410 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     87A  TYR*     3.9    22.5    +      -       +      -
     88A  MET*     4.0    26.7    -      -       +      +
     91A  THR*     4.2    14.1    -      -       +      -
     92A  GLY*     4.2     2.0    -      -       -      -
     95A  ALA*     4.0    20.2    -      -       +      -
    406A  LEU*     3.0    45.9    +      -       +      +
    407A  ASP      4.1     0.4    -      -       -      +
    409A  VAL*     1.3    73.5    -      -       -      +
    411A  PHE*     1.3    65.7    +      -       +      +
    413A  ARG*     3.8     7.0    -      -       -      +
    414A  ALA*     2.8    26.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 411 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     84A  ALA      3.6    22.0    -      -       -      -
     87A  TYR*     4.0    21.1    -      +       -      -
     88A  MET*     3.5    32.1    -      -       +      -
    363A  LYS      5.4     0.2    -      -       -      -
    364A  VAL*     3.8    29.7    -      -       +      +
    366A  GLY*     6.6     0.2    -      -       -      -
    386A  VAL*     3.6    13.2    -      -       +      +
    387A  GLY      5.6     1.1    -      -       -      +
    392A  VAL*     3.9    26.0    -      -       +      -
    394A  VAL*     3.7    16.2    -      -       +      -
    407A  ASP*     2.9    41.0    +      -       -      +
    410A  VAL*     1.3    72.8    -      -       +      +
    412A  GLY*     1.3    58.2    +      -       -      +
    413A  ARG      3.2     0.2    -      -       -      -
    414A  ALA*     3.5     3.2    -      -       -      +
    415A  ALA*     2.6    35.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 412 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18A  ALA*     4.0    15.9    -      -       -      -
     21A  ARG*     4.7     0.4    -      -       -      -
     22A  ALA*     3.1    21.1    -      -       -      +
    386A  VAL*     4.1    13.6    -      -       -      +
    408A  LEU      2.8    25.4    +      -       -      -
    411A  PHE*     1.3    71.3    -      -       -      +
    413A  ARG*     1.3    57.3    +      -       -      +
    415A  ALA*     2.9    23.4    +      -       -      +
    416A  GLY      3.1     1.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 413 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     21A  ARG*     3.6    36.4    -      -       +      +
     25A  GLN*     3.6    18.1    +      -       -      +
     87A  TYR*     5.6     1.6    -      -       -      -
     91A  THR*     3.4    30.4    -      -       -      +
     94A  GLU*     3.7    19.2    +      -       -      +
     95A  ALA*     3.5    25.3    -      -       -      +
     98A  GLU*     3.6    27.8    +      -       -      -
    409A  VAL*     2.8    18.9    +      -       -      +
    410A  VAL      4.3     5.6    -      -       -      -
    412A  GLY*     1.3    73.6    -      -       -      +
    414A  ALA*     1.3    60.5    +      -       -      +
    416A  GLY*     2.9     2.7    +      -       -      +
    417A  LEU*     2.8    49.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 414 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     87A  TYR*     3.3    31.6    -      -       +      +
    364A  VAL      4.0    11.9    -      -       -      +
    365A  THR      4.7     1.3    -      -       -      -
    410A  VAL      2.8    20.5    +      -       -      +
    411A  PHE*     3.1     9.8    +      -       -      +
    413A  ARG*     1.3    78.4    -      -       -      +
    415A  ALA*     1.3    63.8    +      -       -      +
    417A  LEU*     4.4     5.6    -      -       -      +
    418A  HIS*     3.1    38.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 415 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     22A  ALA*     4.4     6.7    -      -       +      -
     26A  ILE*     5.0     2.7    -      -       +      +
    199A  VAL*     5.6     8.5    -      -       +      -
    365A  THR      3.7    18.5    -      -       -      +
    366A  GLY*     4.8     1.8    -      -       -      -
    384A  PHE*     5.7     4.7    -      -       +      -
    386A  VAL*     3.4    23.6    -      -       +      -
    411A  PHE      2.6    13.0    +      -       -      +
    412A  GLY*     2.9    14.6    -      -       -      +
    414A  ALA*     1.3    78.8    -      -       -      +
    416A  GLY*     1.3    57.4    +      -       -      +
    418A  HIS      4.2     0.3    -      -       -      -
    419A  LEU*     3.3    26.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 416 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     22A  ALA*     4.6     0.6    -      -       -      +
     25A  GLN*     3.7    19.7    -      -       -      -
     26A  ILE*     3.9    24.0    -      -       -      +
     29A  SER*     5.0     5.9    +      -       -      -
    412A  GLY      3.1     7.2    +      -       -      -
    413A  ARG      2.9     6.9    +      -       -      -
    415A  ALA*     1.3    75.1    -      -       -      +
    417A  LEU*     1.3    67.2    +      -       -      +
    418A  HIS      3.0     2.8    +      -       -      -
    419A  LEU*     3.0    17.0    +      -       -      +
    420A  GLN      4.7     0.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 417 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     25A  GLN*     3.3    31.6    -      -       -      +
     29A  SER*     5.5     1.6    -      -       -      -
     87A  TYR*     5.2     5.8    -      -       -      +
    413A  ARG*     2.8    48.8    +      -       +      +
    414A  ALA*     4.0     8.3    -      -       -      +
    416A  GLY*     1.3    71.5    -      -       -      +
    418A  HIS*     1.3    68.8    +      -       +      +
    420A  GLN*     5.0     4.2    +      -       -      +
    421A  GLU*     5.6     1.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 418 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     87A  TYR*     4.6    10.3    +      -       -      -
    364A  VAL*     5.1     5.3    -      -       +      +
    365A  THR*     3.9    43.9    -      -       +      +
    414A  ALA*     3.1    32.3    +      -       +      +
    416A  GLY      3.0     1.0    -      -       -      -
    417A  LEU*     1.3    85.5    +      -       +      +
    419A  LEU*     1.3    64.6    +      -       -      +
    420A  GLN      3.5     1.6    -      -       -      -
    421A  GLU*     3.1    32.5    +      -       -      +
    422A  SER*     3.0    21.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 419 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      9A  ASP      5.3     0.2    -      -       -      +
     10A  ALA*     4.2    12.8    -      -       +      -
     26A  ILE*     3.6    42.4    -      -       +      -
     31A  GLN*     4.4    13.7    -      -       +      +
    197A  ALA*     3.8     9.4    -      -       +      -
    199A  VAL*     5.3     3.6    -      -       +      -
    365A  THR      6.1     0.2    -      -       -      -
    384A  PHE*     3.6    37.5    -      -       +      -
    415A  ALA      3.3    15.1    +      -       -      +
    416A  GLY*     3.0    16.1    +      -       -      +
    418A  HIS*     1.3    75.0    -      -       -      +
    420A  GLN*     1.3    65.8    +      -       +      +
    422A  SER*     3.0     6.5    +      -       -      -
    423A  ILE*     3.0    32.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 420 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29A  SER*     3.2    33.3    -      -       -      +
     31A  GLN*     3.7    29.8    -      -       +      +
    416A  GLY      4.7     1.0    +      -       -      -
    417A  LEU      5.0     2.8    +      -       -      +
    418A  HIS      3.5     1.0    -      -       -      -
    419A  LEU*     1.3    77.4    -      -       +      +
    421A  GLU*     1.3    65.6    +      -       -      +
    423A  ILE*     3.5     4.8    +      -       -      +
    424A  ALA*     3.2    19.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 421 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    365A  THR*     5.1     5.4    -      -       -      +
    417A  LEU      5.6     0.8    +      -       -      +
    418A  HIS*     3.1    37.1    +      -       -      +
    420A  GLN*     1.3    78.8    -      -       -      +
    422A  SER*     1.3    59.1    +      -       -      +
    424A  ALA*     2.9    28.8    +      -       +      +
    425A  GLU*     3.1     8.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 422 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    365A  THR*     4.2     9.4    +      -       -      +
    367A  GLN*     3.8    30.0    +      -       -      +
    384A  PHE*     3.8    25.5    -      -       -      -
    418A  HIS*     3.0    13.1    +      -       -      +
    419A  LEU*     3.0     9.3    +      -       -      -
    421A  GLU*     1.3    77.9    +      -       -      +
    423A  ILE*     1.3    63.0    +      -       -      +
    424A  ALA      3.1     0.9    +      -       -      -
    425A  GLU*     3.2    12.3    +      -       -      +
    426A  GLN*     3.2    24.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 423 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      9A  ASP*     4.1    12.3    -      -       +      +
     31A  GLN*     4.0    23.6    -      -       -      +
    196A  ARG*     4.2    48.9    -      -       +      +
    197A  ALA*     4.1    14.8    -      -       +      -
    384A  PHE*     4.8     2.5    -      -       +      -
    419A  LEU*     3.0    36.2    +      -       +      +
    420A  GLN*     3.9     4.7    -      -       -      +
    422A  SER*     1.3    71.5    -      -       -      +
    424A  ALA*     1.3    65.4    +      -       -      +
    426A  GLN*     3.3    23.4    -      -       -      +
    427A  GLY*     3.3    10.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 424 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    420A  GLN      3.2    11.8    +      -       -      +
    421A  GLU*     2.9    15.5    +      -       -      +
    423A  ILE*     1.3    77.3    -      -       -      +
    425A  GLU*     1.3    54.7    +      -       -      +
    427A  GLY*     2.6    31.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 425 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    363A  LYS*     5.0     6.2    +      -       -      -
    367A  GLN*     2.9    34.9    +      -       -      +
    379A  VAL*     4.6    11.2    -      -       -      +
    421A  GLU*     3.1     8.1    +      -       +      +
    422A  SER*     3.4    10.0    -      -       -      +
    424A  ALA*     1.3    78.7    -      -       -      +
    426A  GLN*     1.3    61.9    +      -       -      +
    427A  GLY      3.6     0.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 426 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    196A  ARG*     3.3    25.4    +      -       -      +
    367A  GLN*     5.2     4.6    -      -       -      +
    379A  VAL*     5.9     2.5    -      -       +      +
    380A  VAL      4.6     1.4    -      -       -      +
    381A  PRO*     3.9    12.9    -      -       +      +
    382A  GLY*     3.1    22.7    +      -       -      +
    384A  PHE*     4.4    10.1    -      -       -      -
    422A  SER      3.2    16.5    +      -       -      +
    423A  ILE*     3.3    23.0    +      -       -      +
    425A  GLU*     1.3    80.4    -      -       +      +
    427A  GLY*     1.3    69.0    +      -       -      +
    428A  ALA      3.6     4.7    -      -       -      +
    429A  LEU*     3.5    31.8    -      -       +      +
----------------------------------------------------------
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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