Contacts of the helix formed by residues 409 - 435 (chain B) in PDB entry 2HD1


Residue contacts within the protein are derived with the CSU software (Sobolev V., Sorokine A., Prilusky J., Abola E.E. and Edelman M. (1999) Automated analysis of interatomic contacts in proteins. Bioinformatics, 15, 327-332). A short description of the analytical approach is given at the end of the page.
For CSU analysis of other PDB entry

Note:
Non-standard 3 letter residue codes indicate a heterogroup. To identify and analyse, use LPC software

Legend:
Dist - nearest distance (Å) between atoms of two residues
Surf - contact surface area (Å2) between two residues
HB   - hydrophilic-hydrophilic contact (hydrogen bond)
Arom - aromatic-aromatic contact
Phob - hydrophobic-hydrophobic contact
DC   - hydrophobic-hydrophilic contact (destabilizing contact)
+/-  - indicates presence/absence of a specific contacts
*    - indicates residues forming contacts  by their side chain
       (including CA atoms)
Residues in contact with PRO 409 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    199B  PRO      3.9    13.2    -      -       -      +
    200B  THR*     3.6    33.7    -      -       -      +
    407B  VAL      4.6     0.9    -      -       -      +
    408B  ARG*     1.3    86.4    -      -       +      +
    410B  MET*     1.3    57.4    +      -       -      +
    411B  GLU*     4.7     7.4    -      -       -      +
    412B  VAL*     2.7    40.3    +      -       +      +
    413B  ALA      2.8    10.2    +      -       -      -
    482B  PRO*     6.0     2.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 410 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    408B  ARG      3.4     3.6    +      -       -      -
    409B  PRO*     1.3    68.8    -      -       -      +
    411B  GLU*     1.3    75.2    +      -       +      +
    413B  ALA*     4.5     4.0    -      -       -      -
    414B  GLU*     2.9    49.2    +      -       +      +
    489B  ARG*     2.7    61.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 411 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    204B  TRP*     4.7     1.7    +      -       -      -
    409B  PRO*     3.2     6.3    -      -       +      +
    410B  MET*     1.3    91.2    -      -       +      +
    412B  VAL*     1.3    61.7    +      -       +      +
    414B  GLU*     4.9     1.6    -      -       -      -
    415B  PRO*     3.1    22.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 412 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    200B  THR      4.8     1.6    -      -       -      +
    201B  PHE      4.5     3.1    -      -       -      +
    202B  ASP*     3.8    30.5    -      -       +      +
    203B  VAL*     3.7    32.3    -      -       +      +
    204B  TRP*     2.8    30.6    +      -       +      +
    408B  ARG*     4.0    22.9    -      -       +      -
    409B  PRO*     2.7    31.4    +      -       +      +
    411B  GLU*     1.3    75.1    -      -       +      +
    413B  ALA*     1.3    61.9    +      -       -      +
    415B  PRO*     3.4     2.1    -      -       -      +
    416B  TRP*     3.4     7.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 413 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    405B  ASN*     3.2    30.7    -      -       -      +
    406B  GLU*     4.2    17.6    -      -       -      +
    408B  ARG*     3.7     9.8    -      -       -      +
    409B  PRO      2.8    14.5    +      -       -      +
    410B  MET*     3.9     4.5    -      -       -      +
    412B  VAL*     1.3    77.0    -      -       -      +
    414B  GLU*     1.3    65.7    +      -       -      +
    416B  TRP*     2.9    26.1    +      -       -      +
    417B  VAL*     3.7     8.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 414 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    410B  MET*     2.9    43.1    +      -       +      +
    411B  GLU*     4.6     1.1    -      -       -      +
    413B  ALA*     1.3    72.6    -      -       -      +
    415B  PRO*     1.3    70.0    -      -       +      +
    417B  VAL*     3.0    21.0    +      -       -      +
    418B  ASP*     3.7     7.5    -      -       -      +
    449B  LYS*     2.6    39.0    +      -       -      -
    489B  ARG*     3.3    24.9    +      -       -      +
    490B  TYR*     3.5    23.4    +      -       -      +
    493B  LEU*     5.3     2.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with PRO 415 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    204B  TRP*     3.3    41.7    -      -       +      +
    411B  GLU      3.1    24.2    -      -       -      +
    412B  VAL      3.4     2.2    -      -       -      +
    414B  GLU*     1.3    89.1    -      -       +      +
    416B  TRP*     1.3    58.3    +      -       -      -
    418B  ASP*     3.4    15.7    +      -       +      +
    419B  CYS*     3.3    24.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with TRP 416 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    203B  VAL*     3.8    12.3    -      -       +      +
    204B  TRP*     3.2    32.0    -      +       -      +
    250B  PRO      4.6     2.2    -      -       -      -
    251B  PHE*     3.6    50.4    -      +       -      -
    253B  ASN*     3.8    10.5    -      -       -      -
    255B  ARG*     3.8    23.6    -      -       +      -
    256B  HIS*     3.5    27.8    -      -       +      -
    259B  CYS*     3.5    25.4    -      -       -      -
    405B  ASN*     3.5    31.8    +      -       +      +
    408B  ARG*     5.3     2.0    -      -       -      +
    412B  VAL*     3.4    19.7    -      -       +      -
    413B  ALA*     2.9    12.9    +      -       -      +
    415B  PRO*     1.3    76.5    -      -       -      +
    417B  VAL*     1.3    65.4    +      -       +      +
    419B  CYS*     3.4     8.1    +      -       +      +
    420B  LEU*     3.0    23.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 417 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    406B  GLU*     3.5    19.3    -      -       -      +
    413B  ALA      4.1     5.4    -      -       -      +
    414B  GLU      3.0    11.6    +      -       -      +
    416B  TRP*     1.3    79.2    -      -       +      +
    418B  ASP*     1.3    62.2    +      -       -      +
    420B  LEU*     3.3     8.7    +      -       +      +
    421B  LEU*     3.0    29.2    +      -       +      +
    449B  LYS*     3.9    32.5    -      -       +      -
    452B  ALA*     5.2     2.2    -      -       +      -
    453B  GLN*     3.8    30.1    -      -       +      +
    490B  TYR*     3.4    22.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 418 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    414B  GLU      3.7     5.5    -      -       -      +
    415B  PRO*     3.4    13.6    +      -       +      +
    417B  VAL*     1.3    78.6    -      -       -      +
    419B  CYS*     1.3    57.9    +      -       -      +
    421B  LEU*     3.5     6.7    +      -       -      +
    422B  GLU*     2.9    31.5    +      -       -      +
    449B  LYS*     3.0    40.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with CYS 419 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    204B  TRP*     4.1    22.4    -      -       -      -
    250B  PRO*     3.0    35.3    -      -       -      +
    251B  PHE*     3.9    11.7    -      -       +      +
    415B  PRO      3.3    15.6    +      -       -      -
    416B  TRP*     3.6    12.3    -      -       +      +
    417B  VAL      3.3     0.4    -      -       -      -
    418B  ASP*     1.3    79.2    -      -       -      +
    420B  LEU*     1.3    63.4    +      -       -      +
    422B  GLU*     3.1    20.3    +      -       -      +
    423B  GLU      3.2     9.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 420 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      1B  IBM      3.5    46.9    -      -       +      +
    251B  PHE*     3.6    38.9    -      -       +      -
    252B  HIS*     4.8     6.3    -      -       +      -
    416B  TRP      3.0    18.3    +      -       -      +
    417B  VAL*     3.6     8.7    -      -       +      +
    419B  CYS*     1.3    76.5    -      -       -      +
    421B  LEU*     1.3    66.0    +      -       +      +
    423B  GLU*     3.0     7.0    +      -       +      +
    424B  TYR*     3.0    58.9    +      -       +      +
    452B  ALA*     6.3     0.4    -      -       +      -
    453B  GLN*     4.6     6.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 421 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    417B  VAL*     3.0    22.5    +      -       +      +
    418B  ASP*     4.0     5.6    -      -       -      +
    420B  LEU*     1.3    79.4    -      -       +      +
    422B  GLU*     1.3    56.6    +      -       -      +
    424B  TYR*     3.0    21.2    +      -       +      -
    425B  PHE*     2.7    66.2    +      -       +      -
    441B  PHE      5.2     0.4    -      -       -      +
    447B  VAL*     3.8    20.6    -      -       +      -
    448B  THR*     4.2     4.9    -      -       -      -
    449B  LYS*     4.0    39.7    -      -       +      +
    452B  ALA*     4.2    11.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 422 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    250B  PRO*     3.5    26.5    -      -       +      +
    418B  ASP      2.9    16.4    +      -       -      +
    419B  CYS*     3.3    15.0    -      -       -      +
    421B  LEU*     1.3    75.3    -      -       -      +
    423B  GLU*     1.3    57.2    +      -       -      +
    425B  PHE*     4.0     7.0    -      -       -      +
    426B  MET*     3.1    37.4    +      -       +      +
    444B  ARG*     5.2     3.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 423 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    249B  ASN*     3.5     9.1    -      -       -      +
    250B  PRO*     3.7    14.5    -      -       +      +
    251B  PHE*     2.8    33.1    +      -       +      -
    252B  HIS*     2.5    40.5    +      -       -      -
    296B  HIS*     3.9     1.9    -      -       -      -
    298B  GLY*     3.5    39.5    -      -       -      +
    419B  CYS      3.2     3.2    +      -       -      +
    420B  LEU*     3.0    11.0    +      -       +      +
    422B  GLU*     1.3    78.6    -      -       -      +
    424B  TYR*     1.3    69.9    +      -       +      +
    426B  MET*     3.2     9.3    +      -       +      +
    427B  GLN*     3.0    22.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 424 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      1B  IBM      3.2    43.9    +      +       -      -
    252B  HIS*     5.5     6.3    -      +       -      -
    300B  ASN*     6.1     3.6    -      -       +      -
    420B  LEU*     3.0    45.3    +      -       +      +
    421B  LEU*     3.0    22.4    +      -       +      +
    423B  GLU*     1.3    80.0    -      -       +      +
    425B  PHE*     1.3    60.8    +      -       +      +
    427B  GLN*     3.0     6.7    +      -       -      +
    428B  SER*     2.9    28.2    +      -       -      -
    441B  PHE*     3.5    33.4    -      +       -      -
    442B  MET*     3.5    41.4    -      -       +      +
    452B  ALA*     6.3     0.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 425 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    421B  LEU*     2.7    53.8    +      -       +      +
    422B  GLU*     4.1     4.5    -      -       -      +
    424B  TYR*     1.3    75.3    -      -       +      +
    426B  MET*     1.3    63.4    +      -       -      +
    428B  SER*     3.2     5.3    +      -       -      -
    429B  ASP*     2.9    31.8    +      -       -      -
    442B  MET      3.4    16.4    -      -       -      -
    443B  ASP      3.9     5.2    -      -       -      -
    444B  ARG*     3.2    62.1    -      -       +      +
    447B  VAL*     3.9    31.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 426 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    250B  PRO*     4.5    23.6    -      -       +      -
    298B  GLY*     5.4     3.6    -      -       -      +
    299B  TYR*     3.6    29.7    +      -       +      +
    422B  GLU*     3.1    30.4    +      -       +      +
    423B  GLU*     3.3     8.7    -      -       -      +
    425B  PHE*     1.3    76.1    -      -       -      +
    427B  GLN*     1.3    62.1    +      -       -      +
    429B  ASP*     3.9     6.5    -      -       -      +
    430B  ARG*     3.3    22.3    +      -       -      +
    444B  ARG*     4.6     2.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 427 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    298B  GLY      4.6     1.8    -      -       -      +
    299B  TYR*     3.6    27.7    -      -       +      -
    300B  ASN*     3.0    49.2    +      -       -      +
    302B  THR*     5.1     1.6    -      -       -      +
    303B  TYR*     3.6     9.1    -      -       +      +
    423B  GLU      3.0    12.1    +      -       -      +
    424B  TYR*     3.4     9.0    -      -       -      +
    426B  MET*     1.3    76.0    -      -       -      +
    428B  SER*     1.3    60.4    +      -       -      +
    430B  ARG*     3.1     3.5    +      -       -      +
    431B  GLU*     2.8    61.0    +      -       +      +
    442B  MET*     3.6    24.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 428 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    424B  TYR      2.9     9.9    +      -       -      -
    425B  PHE*     3.2    11.6    +      -       -      -
    427B  GLN*     1.3    70.8    -      -       -      +
    429B  ASP*     1.3    64.9    +      -       -      +
    431B  GLU*     3.2    13.8    +      -       -      +
    432B  LYS*     2.8    39.4    +      -       -      +
    438B  VAL*     3.9    21.5    -      -       -      +
    442B  MET*     2.8    32.6    +      -       -      +
    443B  ASP*     4.4     2.0    -      -       -      -
    444B  ARG      4.0     6.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 429 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    425B  PHE      2.9    23.7    +      -       -      +
    426B  MET*     3.9     6.2    -      -       -      +
    428B  SER*     1.3    77.0    +      -       -      +
    430B  ARG*     1.3    59.3    +      -       -      +
    432B  LYS*     3.3    16.1    +      -       -      +
    433B  SER*     2.9    29.5    +      -       -      -
    444B  ARG*     2.4    52.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 430 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    299B  TYR*     3.4    44.7    +      -       -      +
    303B  TYR*     2.8    38.6    +      -       +      -
    426B  MET      3.3    11.7    +      -       -      +
    427B  GLN      3.1     9.7    +      -       -      +
    429B  ASP*     1.3    80.6    -      -       -      +
    431B  GLU*     1.3    56.4    +      -       -      +
    433B  SER*     3.1     6.7    +      -       -      -
    434B  GLU*     2.8    56.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 431 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    302B  THR*     5.1     3.8    -      -       -      +
    303B  TYR*     3.7    28.7    +      -       +      +
    306B  ASN*     5.2     2.9    +      -       -      +
    427B  GLN*     2.8    48.2    +      -       -      +
    428B  SER*     3.2    20.6    +      -       -      +
    430B  ARG*     1.3    73.1    -      -       -      +
    432B  LYS*     1.3    62.1    +      -       -      +
    434B  GLU*     4.5     2.0    -      -       -      +
    435B  GLY*     3.0     3.3    +      -       -      -
    436B  LEU*     2.7    53.9    +      -       +      +
    437B  PRO      3.4    18.7    -      -       -      +
    438B  VAL*     3.9    11.3    -      -       +      -
    439B  ALA*     4.3     4.4    +      -       -      +
    442B  MET*     5.0     2.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 432 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    428B  SER*     2.8    26.4    +      -       -      +
    429B  ASP*     3.5    17.9    +      -       -      +
    431B  GLU*     1.3    78.1    -      -       -      +
    433B  SER*     1.3    63.9    +      -       -      +
    435B  GLY*     3.4     9.2    +      -       -      -
    436B  LEU      4.8     0.4    -      -       -      -
    438B  VAL*     3.5    22.4    -      -       +      -
    443B  ASP*     3.0    36.6    +      -       -      -
    444B  ARG*     4.4     6.5    -      -       -      +
    445B  ASP*     3.1    19.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 433 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    429B  ASP      2.9    17.3    +      -       -      -
    430B  ARG*     3.5     7.0    -      -       -      -
    432B  LYS*     1.3    80.0    -      -       -      +
    434B  GLU*     1.3    61.8    +      -       -      +
    435B  GLY      3.2     0.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 434 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    303B  TYR*     2.7    25.8    +      -       -      -
    307B  ALA*     4.6     1.0    -      -       -      +
    430B  ARG*     2.8    53.3    +      -       +      +
    431B  GLU      4.3     0.4    -      -       -      +
    433B  SER*     1.3    75.7    -      -       -      +
    435B  GLY*     1.3    60.9    +      -       -      +
    436B  LEU*     3.4    28.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 435 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    431B  GLU      3.0     5.4    +      -       -      -
    432B  LYS*     3.4     7.5    +      -       -      -
    433B  SER      3.2     4.2    +      -       -      -
    434B  GLU*     1.3    80.2    -      -       -      +
    436B  LEU*     1.3    64.5    +      -       -      +
    437B  PRO*     4.6     1.6    -      -       -      +
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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