Contacts of the helix formed by residues 408 - 433 (chain N) in PDB entry 3HOU


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 LEU 408 (chain N).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46N  GLN*     3.6    52.0    -      -       +      +
     47N  GLN*     3.8    14.4    -      -       -      +
     50N  SER*     3.5    16.6    -      -       -      +
    213N  ILE      6.3     0.4    -      -       -      -
    214N  ALA*     4.2    13.5    -      -       +      +
    406N  LEU*     3.0    23.4    +      -       +      +
    407N  ASP*     1.3    75.3    -      -       -      +
    409N  ALA*     1.3    72.1    +      -       +      +
    410N  GLY      3.2     2.4    +      -       -      -
    411N  PRO*     3.2     9.3    -      -       -      +
    412N  LEU*     3.2    23.6    +      -       -      +
    539N  LEU*     5.9     0.2    -      -       +      -
    545N  ILE*     3.3    31.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 409 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     47N  GLN*     3.8    20.8    +      -       -      +
     50N  SER*     4.6     0.2    -      -       -      +
     51N  PHE*     4.8     1.8    -      -       +      -
    173N  MET*     3.3    35.0    -      -       +      -
    203N  PHE*     4.4     3.8    -      -       +      -
    212N  LEU*     3.5    24.2    -      -       +      +
    408N  LEU*     1.3    78.6    -      -       -      +
    410N  GLY*     1.3    62.3    +      -       -      +
    412N  LEU*     3.4     2.6    +      -       -      +
    413N  LEU*     2.9    29.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 410 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     50N  SER*     2.9    28.8    +      -       -      -
     51N  PHE*     4.5     0.6    -      -       -      +
     54N  PHE*     3.9    17.5    -      -       -      -
    409N  ALA*     1.3    75.0    -      -       -      +
    411N  PRO*     1.3    60.3    -      -       -      +
    412N  LEU      2.9     0.9    +      -       -      -
    413N  LEU*     2.9     5.4    +      -       -      +
    414N  ALA*     2.6    37.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with PRO 411 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     50N  SER*     3.0    19.3    -      -       -      +
    406N  LEU      5.4     0.4    -      -       -      +
    407N  ASP*     4.0    23.3    -      -       +      +
    408N  LEU      3.2    19.3    -      -       -      +
    410N  GLY*     1.3    83.1    -      -       -      +
    412N  LEU*     1.3    55.6    +      -       -      +
    414N  ALA*     3.2     8.9    -      -       +      +
    415N  GLN*     2.8    28.6    +      -       -      +
    547N  VAL      6.0     1.8    -      -       -      +
    630N  ALA*     5.9     7.4    -      -       +      -
    631N  GLY*     6.5     0.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 412 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    212N  LEU*     4.3    15.7    -      -       +      -
    213N  ILE      4.1     7.0    -      -       -      +
    215N  GLN*     4.3    12.3    -      -       +      -
    407N  ASP*     3.6    21.8    -      -       +      +
    408N  LEU      3.2    21.5    +      -       -      +
    409N  ALA      3.5     3.8    -      -       -      +
    410N  GLY      2.9     1.6    +      -       -      -
    411N  PRO*     1.3    73.8    -      -       -      +
    413N  LEU*     1.3    66.3    +      -       -      +
    414N  ALA      3.1     0.9    -      -       -      -
    415N  GLN*     3.1     4.7    +      -       -      +
    416N  LEU*     3.0    16.8    +      -       -      +
    466N  TRP*     3.0    39.8    +      -       +      +
    476N  ARG*     3.8    24.2    -      -       -      +
    479N  VAL*     3.8    22.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 413 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     51N  PHE*     3.3    42.4    -      -       +      -
     54N  PHE*     3.9    21.1    -      -       +      -
    170N  LEU*     4.9     7.9    -      -       +      -
    171N  PRO*     5.5     0.9    -      -       +      +
    203N  PHE*     4.0    11.7    -      -       +      -
    212N  LEU*     4.5     6.3    -      -       +      -
    409N  ALA      2.9    21.3    +      -       -      +
    410N  GLY*     2.9     8.4    +      -       -      +
    412N  LEU*     1.3    71.9    -      -       -      +
    414N  ALA*     1.3    57.2    -      -       -      +
    416N  LEU*     2.9     7.7    +      -       +      +
    417N  PHE*     2.7    36.0    +      -       -      +
    457N  LEU*     4.8    14.7    -      -       +      +
    461N  LEU*     4.3    33.4    -      -       +      -
    466N  TRP*     4.3     2.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 414 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     54N  PHE*     3.4    23.0    -      -       +      -
     58N  THR*     4.0    15.5    -      -       +      -
     62N  ILE*     3.7     7.0    -      -       +      +
    249N  ARG*     5.7     7.0    -      -       -      +
    410N  GLY      2.6    16.6    +      -       -      +
    411N  PRO*     3.2    16.2    -      -       +      +
    413N  LEU*     1.3    75.7    -      -       -      +
    415N  GLN*     1.3    64.0    +      -       -      +
    418N  LYS*     3.1    25.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 415 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    411N  PRO      2.8    18.0    +      -       -      +
    412N  LEU*     3.1     8.4    +      -       -      +
    414N  ALA*     1.3    74.8    -      -       -      +
    416N  LEU*     1.3    52.5    +      -       -      +
    418N  LYS*     3.8     6.4    -      -       -      +
    419N  THR*     2.8    37.1    +      -       +      +
    466N  TRP*     3.9    22.7    +      -       -      +
    467N  GLY*     5.1     6.7    -      -       -      +
    476N  ARG*     2.6    34.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 416 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    412N  LEU      3.0     9.6    +      -       -      +
    413N  LEU*     2.9    11.6    +      -       -      +
    415N  GLN*     1.3    76.2    -      -       -      +
    417N  PHE*     1.3    66.0    +      -       -      +
    418N  LYS      3.1     1.6    -      -       -      -
    419N  THR*     3.0    18.7    +      -       -      +
    420N  LEU*     3.0    35.7    +      -       +      +
    456N  GLY      4.8     5.8    -      -       -      +
    457N  LEU*     4.6     9.2    -      -       +      -
    460N  ALA*     3.3    32.1    -      -       +      -
    461N  LEU*     4.6     4.5    -      -       +      -
    466N  TRP*     3.6    46.7    -      -       +      +
    467N  GLY*     6.0     0.4    -      -       -      -
    468N  GLU*     5.0     8.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 417 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     54N  PHE*     4.1    13.0    -      +       +      -
     59N  LEU*     3.1    34.3    -      -       +      -
     62N  ILE*     3.8    20.0    -      -       +      -
     63N  ILE*     4.1    20.4    -      -       +      -
     95N  ILE*     5.1     2.5    -      -       +      -
    128N  LEU*     3.8    20.4    -      -       +      -
    167N  ILE      5.6     0.4    -      -       -      -
    170N  LEU*     6.0     0.7    -      -       +      -
    413N  LEU      2.7    19.3    +      -       -      +
    414N  ALA      4.0     2.2    -      -       -      +
    416N  LEU*     1.3    71.8    -      -       -      +
    418N  LYS*     1.3    53.2    +      -       -      +
    420N  LEU*     3.0     5.7    +      -       -      +
    421N  PHE*     2.6    52.3    +      -       +      +
    453N  ILE*     3.3    41.1    -      -       +      -
    457N  LEU*     4.6    18.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 418 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     62N  ILE*     3.5    28.9    -      -       +      -
     65N  GLU*     2.8    23.7    +      -       -      +
    247N  GLY      3.6     2.2    -      -       -      +
    248N  SER*     3.1    24.7    -      -       -      +
    249N  ARG*     2.8    40.7    -      -       -      +
    414N  ALA      3.1    17.9    +      -       -      +
    415N  GLN*     3.8     7.2    -      -       -      +
    416N  LEU      3.1     0.2    -      -       -      -
    417N  PHE*     1.3    81.6    -      -       -      +
    419N  THR*     1.3    65.0    +      -       +      +
    420N  LEU      3.0     1.2    +      -       -      -
    421N  PHE*     3.3     1.1    +      -       -      +
    422N  LYS*     3.0    56.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 419 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    415N  GLN*     2.8    24.0    +      -       +      +
    416N  LEU*     3.0    13.7    +      -       -      +
    418N  LYS*     1.3    77.3    -      -       -      +
    420N  LEU*     1.3    61.1    +      -       -      +
    422N  LYS*     4.1     8.8    +      -       +      +
    423N  LYS*     3.7    16.1    +      -       -      +
    468N  GLU*     5.4    13.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 420 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    416N  LEU*     3.0    34.5    +      -       +      +
    417N  PHE*     3.0     9.0    +      -       -      +
    419N  THR*     1.3    76.6    -      -       -      +
    421N  PHE*     1.3    57.9    +      -       -      +
    422N  LYS      3.0     1.6    -      -       -      -
    423N  LYS*     2.7    27.0    +      -       +      +
    424N  LEU*     3.1    10.4    +      -       -      +
    452N  THR*     4.2    27.0    -      -       +      +
    453N  ILE*     4.5    18.7    -      -       +      +
    456N  GLY*     3.7    25.8    -      -       -      -
    457N  LEU*     3.8    17.0    -      -       +      +
    468N  GLU*     4.2    28.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 421 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     62N  ILE*     3.2    34.5    -      -       +      -
     63N  ILE*     3.2    45.5    -      -       +      -
     66N  ASP*     4.1    14.6    -      -       -      -
     67N  SER*     4.4    10.1    -      -       -      -
     92N  PHE*     4.6    16.8    -      +       -      -
    417N  PHE*     2.6    36.3    +      -       +      +
    418N  LYS      3.9     2.5    -      -       -      +
    420N  LEU*     1.3    72.2    -      -       -      +
    422N  LYS*     1.3    55.0    +      -       +      +
    424N  LEU*     3.4    20.6    +      -       +      +
    425N  THR*     2.7    50.5    +      -       -      -
    453N  ILE*     4.2    12.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 422 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65N  GLU*     3.8     2.9    +      -       -      -
     66N  ASP*     3.0    41.8    -      -       +      +
    248N  SER*     4.5    13.1    -      -       -      +
    418N  LYS*     3.0    57.9    +      -       +      +
    419N  THR*     4.4     8.1    -      -       +      +
    420N  LEU      3.0     1.0    -      -       -      -
    421N  PHE*     1.3    79.8    -      -       +      +
    423N  LYS*     1.3    60.5    +      -       -      +
    424N  LEU      3.2     1.6    -      -       -      -
    425N  THR*     3.7     9.1    -      -       +      +
    426N  LYS*     2.9    36.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 423 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    419N  THR      3.7    11.4    +      -       -      +
    420N  LEU*     2.7    15.4    +      -       +      +
    422N  LYS*     1.3    78.2    -      -       -      +
    424N  LEU*     1.3    58.7    +      -       -      +
    426N  LYS*     3.8    10.4    -      -       -      +
    427N  ASP*     2.9    41.6    +      -       -      +
    452N  THR*     4.3    23.3    -      -       +      -
    468N  GLU*     3.7    13.2    -      -       -      +
    470N  LYS*     3.1    40.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 424 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     92N  PHE*     6.1     0.7    -      -       +      -
    167N  ILE*     3.2    36.3    -      -       +      -
    420N  LEU      3.1     8.6    +      -       -      +
    421N  PHE*     3.5    22.7    -      -       +      +
    423N  LYS*     1.3    77.7    -      -       -      +
    425N  THR*     1.3    54.9    +      -       -      +
    427N  ASP*     2.9    10.1    +      -       +      +
    428N  ILE*     2.7    54.1    +      -       +      +
    447N  ALA      5.5     0.2    -      -       -      +
    448N  ILE*     4.3     8.7    -      -       +      -
    449N  ASN*     4.1    36.1    -      -       +      +
    452N  THR*     5.3     8.7    -      -       -      +
    453N  ILE*     3.6    16.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 425 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     66N  ASP*     3.9    20.7    +      -       -      +
     67N  SER*     4.1     8.8    +      -       -      -
     69N  LEU*     3.4    28.4    -      -       +      +
     92N  PHE*     4.6     1.9    -      -       -      -
    421N  PHE*     2.7    44.9    +      -       -      -
    422N  LYS*     3.7    11.4    -      -       +      +
    424N  LEU*     1.3    74.8    -      -       -      +
    426N  LYS*     1.3    64.1    +      -       +      +
    427N  ASP      3.2     4.3    +      -       -      -
    428N  ILE*     3.3    26.1    +      -       -      +
    429N  PHE*     3.4     1.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 426 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     69N  LEU*     6.0     0.2    -      -       -      -
    422N  LYS*     2.9    27.7    +      -       -      +
    423N  LYS*     3.8     7.6    -      -       -      +
    424N  LEU      3.2     0.2    -      -       -      -
    425N  THR*     1.3    81.8    -      -       +      +
    427N  ASP*     1.3    63.2    +      -       -      +
    429N  PHE*     4.2    15.0    -      -       +      -
    430N  ARG*     3.6    15.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 427 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    423N  LYS*     2.9    32.1    +      -       -      +
    424N  LEU*     3.1    19.1    -      -       +      +
    426N  LYS*     1.3    77.0    -      -       -      +
    428N  ILE*     1.3    66.3    +      -       -      +
    429N  PHE      3.0     1.3    -      -       -      +
    430N  ARG*     3.0    43.0    +      -       -      +
    431N  TYR*     3.4     5.9    +      -       -      +
    447N  ALA*     5.7     2.2    -      -       -      +
    449N  ASN*     5.6     6.4    -      -       +      +
    452N  THR*     6.1     1.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 428 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     69N  LEU*     3.8     5.2    -      -       +      -
     90N  ILE*     4.3    12.6    -      -       +      -
     92N  PHE*     3.5    35.7    -      -       +      -
    421N  PHE*     5.1     0.9    -      -       +      -
    424N  LEU*     2.7    40.6    +      -       +      +
    425N  THR*     3.3    26.7    -      -       -      +
    427N  ASP*     1.3    79.4    -      -       -      +
    429N  PHE*     1.3    61.1    +      -       -      +
    430N  ARG      3.3     0.2    +      -       -      -
    431N  TYR*     3.4    13.2    +      -       -      +
    432N  MET*     3.3    35.7    +      -       +      +
    447N  ALA*     5.9     5.6    -      -       -      -
    448N  ILE*     5.4    15.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 429 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     69N  LEU*     3.2    40.4    -      -       +      -
     70N  ILE*     3.3    39.7    -      -       +      -
    425N  THR      3.4     8.3    +      -       -      +
    426N  LYS*     4.2    15.5    -      -       +      -
    428N  ILE*     1.3    79.8    -      -       -      +
    430N  ARG*     1.3    57.3    +      -       +      +
    432N  MET*     3.2    23.7    +      -       +      +
    433N  GLN*     2.9    66.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 430 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    426N  LYS      3.6    12.6    +      -       -      +
    427N  ASP*     3.0    49.7    +      -       -      +
    429N  PHE*     1.3    75.5    -      -       +      +
    431N  TYR*     1.3    59.5    +      -       -      +
    433N  GLN*     3.2    24.4    +      -       -      +
    434N  ARG*     3.0    63.3    +      -       -      +
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Residues in contact with TYR 431 (chain N). Click here for Legend to table.
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                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
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    427N  ASP      3.4     4.8    +      -       -      +
    428N  ILE*     3.4    10.3    +      -       -      +
    430N  ARG*     1.3    77.7    -      -       -      +
    432N  MET*     1.3    68.7    +      -       +      +
    434N  ARG*     3.5    17.4    +      -       -      +
    435N  THR*     3.2    29.3    +      -       -      -
    446N  LEU*     4.0    29.7    -      -       +      +
    447N  ALA*     3.0    37.5    -      -       +      -
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Residues in contact with MET 432 (chain N). Click here for Legend to table.
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                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
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     69N  LEU*     3.3    31.4    -      -       +      -
     70N  ILE*     4.7    16.4    -      -       +      -
     90N  ILE*     3.0    36.8    -      -       +      -
    428N  ILE*     3.3    10.8    -      -       +      +
    429N  PHE*     3.2    42.1    +      -       +      +
    431N  TYR*     1.3    78.0    -      -       +      +
    433N  GLN*     1.3    53.5    +      -       +      +
    434N  ARG      2.5    19.2    +      -       -      -
    435N  THR*     2.9    24.8    +      -       -      +
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Residues in contact with GLN 433 (chain N). Click here for Legend to table.
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                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
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     70N  ILE*     5.7     3.6    -      -       +      +
    429N  PHE*     2.9    61.1    +      -       +      +
    430N  ARG*     3.2    15.4    +      -       -      +
    432N  MET*     1.3    72.2    -      -       +      +
    434N  ARG*     1.3    69.9    +      -       -      +
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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) +   -    +    +   +   +    +    -
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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