Contacts of the helix formed by residues 420 - 442 (chain C) in PDB entry 1XVP


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 420 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    356C  LYS*     5.6     1.8    -      -       -      +
    416C  ALA      2.9    10.9    +      -       -      +
    417C  LYS*     3.7    18.8    -      -       +      +
    418C  LEU      3.3     0.8    -      -       -      -
    419C  LEU*     1.3    76.1    -      -       -      +
    421C  ARG*     1.3    77.3    +      -       -      +
    423C  PRO*     3.2    15.5    -      -       +      +
    424C  ALA*     4.7     1.7    +      -       -      +
    265D  MET*     3.9    18.8    -      -       +      -
    285D  GLN*     2.8    40.1    -      -       +      +
    286D  GLU*     4.7    16.6    -      -       +      +
    289D  ALA*     4.1     4.9    -      -       +      -
    309D  TYR*     3.5    24.7    -      -       -      +
    313D  LEU*     3.7     9.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 421 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    352C  GLU*     3.1    41.3    +      -       -      -
    353C  LEU*     4.9    11.3    -      -       +      +
    356C  LYS*     3.7    40.8    -      -       -      +
    357C  MET*     5.6     9.0    -      -       +      +
    360C  MET*     6.4     2.0    -      -       -      -
    362C  MET*     6.3     2.7    -      -       -      -
    370C  LEU*     5.0     6.3    -      -       +      -
    417C  LYS      4.6     7.3    +      -       -      +
    418C  LEU*     3.7    16.2    -      -       -      +
    419C  LEU      2.8     0.2    +      -       -      -
    420C  LEU*     1.3    94.9    +      -       -      +
    422C  LEU*     1.3    65.2    +      -       +      +
    424C  ALA*     3.2    23.0    +      -       -      +
    425C  LEU*     3.1    21.4    +      -       +      +
    270D  PRO*     6.0     1.2    -      -       -      +
    278D  ARG*     5.7     0.4    -      -       -      +
    282D  ASP*     4.8     1.0    +      -       -      -
    285D  GLN*     3.9    20.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 422 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    307C  GLU*     4.6     3.1    -      -       -      +
    370C  LEU*     5.1    12.1    -      -       +      +
    373C  ILE*     4.0    16.4    -      -       +      -
    374C  VAL*     3.9    27.1    -      -       +      -
    393C  ARG*     4.8    10.8    -      -       -      +
    397C  TYR*     5.5     0.2    -      -       -      +
    419C  LEU*     2.9    40.7    +      -       +      +
    421C  ARG*     1.3    76.2    -      -       +      +
    423C  PRO*     1.4    70.7    -      -       +      +
    425C  LEU*     3.1    11.7    +      -       +      +
    426C  ARG*     3.0    21.5    +      -       -      +
    310D  ALA      5.2     3.4    -      -       -      +
    313D  LEU*     4.5    13.7    -      -       +      +
    314D  GLY*     5.1     4.3    -      -       -      +
    317D  ALA*     4.4     6.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with PRO 423 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    419C  LEU      3.9     2.2    -      -       -      +
    420C  LEU*     3.2    20.2    -      -       +      +
    422C  LEU*     1.4    92.6    -      -       +      +
    424C  ALA*     1.3    62.4    +      -       -      +
    426C  ARG*     3.1    19.6    -      -       -      +
    427C  SER*     3.2    10.6    +      -       -      -
    313D  LEU*     3.9    23.8    -      -       +      +
    316D  LEU*     4.1    19.1    -      -       +      -
    317D  ALA*     4.0    15.5    -      -       -      +
    320D  ARG*     3.7    25.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 424 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    352C  GLU*     4.5    13.9    -      -       +      -
    353C  LEU*     4.8     3.6    -      -       +      -
    420C  LEU      4.7     1.5    +      -       -      +
    421C  ARG*     3.2    30.6    +      -       -      +
    423C  PRO*     1.3    79.5    -      -       -      +
    425C  LEU*     1.3    62.2    +      -       -      +
    427C  SER*     3.4     2.1    +      -       -      -
    428C  ILE*     2.9    30.2    +      -       +      +
    271D  ASP*     3.9    27.1    -      -       +      +
    320D  ARG*     3.9     1.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 425 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    307C  GLU*     3.3    48.3    -      -       +      +
    310C  ILE*     3.6    32.3    -      -       +      -
    311C  ALA*     4.3    11.9    -      -       +      +
    353C  LEU*     3.9    18.1    -      -       +      +
    374C  VAL*     4.2    15.5    -      -       +      -
    421C  ARG*     3.1    12.9    +      -       +      +
    422C  LEU*     3.1    15.0    +      -       +      +
    424C  ALA*     1.3    76.6    -      -       -      +
    426C  ARG*     1.3    53.0    +      -       -      +
    428C  ILE*     4.4     2.5    -      -       -      -
    429C  GLY*     2.7    33.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 426 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    303C  ALA      5.9     1.2    +      -       -      -
    307C  GLU*     2.8    35.8    +      -       -      +
    377C  ASN*     4.4    14.5    -      -       -      +
    422C  LEU      3.0    10.8    +      -       -      +
    423C  PRO      3.1    11.0    -      -       -      +
    425C  LEU*     1.3    75.2    -      -       -      +
    427C  SER*     1.3    63.6    +      -       -      +
    429C  GLY*     3.2     2.4    +      -       -      -
    430C  LEU*     3.0    42.4    +      -       +      +
    314D  GLY      5.7     0.6    +      -       -      -
    317D  ALA*     2.7    70.3    +      -       +      +
    318D  GLU*     3.3    24.4    +      -       -      -
    320D  ARG*     3.9    11.0    -      -       +      -
    321D  SER*     3.4    21.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 427 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    348C  ARG*     3.7    27.0    +      -       -      -
    423C  PRO      3.2     1.4    +      -       -      -
    424C  ALA      3.8     6.1    -      -       -      -
    426C  ARG*     1.3    76.9    -      -       -      +
    428C  ILE*     1.3    58.0    +      -       -      +
    430C  LEU*     3.0    16.9    +      -       -      +
    431C  LYS*     2.9    28.7    +      -       -      +
    271D  ASP*     4.4     0.2    -      -       -      -
    272D  ARG*     5.1     0.7    +      -       -      -
    320D  ARG*     2.7    44.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 428 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    310C  ILE*     4.1    18.4    -      -       +      -
    345C  ILE*     4.2     3.4    -      -       +      -
    348C  ARG*     3.3    56.5    -      -       +      +
    349C  VAL*     4.0    21.1    -      -       +      -
    352C  GLU*     4.0     9.4    -      -       +      -
    353C  LEU*     3.9    20.2    -      -       +      -
    424C  ALA*     2.9    22.1    +      -       +      +
    425C  LEU*     3.8     4.0    -      -       -      +
    427C  SER*     1.3    76.4    -      -       -      +
    429C  GLY*     1.3    63.8    +      -       -      +
    431C  LYS*     3.4     6.9    +      -       -      +
    432C  CYS*     3.1    29.0    +      -       -      -
    271D  ASP*     5.7     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 429 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    306C  ASN*     2.9    29.4    -      -       -      +
    307C  GLU*     4.3     7.2    -      -       -      -
    310C  ILE*     3.3    10.5    -      -       -      -
    425C  LEU      2.7    20.0    +      -       -      -
    426C  ARG      3.7     1.6    -      -       -      -
    428C  ILE*     1.3    73.9    -      -       -      +
    430C  LEU*     1.3    62.0    +      -       -      +
    432C  CYS      3.3     1.6    +      -       -      -
    433C  LEU*     3.3    20.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 430 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    426C  ARG*     3.0    43.3    +      -       +      +
    427C  SER*     3.2    16.2    -      -       -      +
    429C  GLY*     1.3    77.1    -      -       -      +
    431C  LYS*     1.3    60.6    +      -       -      +
    433C  LEU*     3.1    31.5    +      -       +      +
    434C  GLU*     3.4    10.4    +      -       -      +
    320D  ARG*     3.9    22.7    -      -       +      +
    321D  SER*     4.0    15.9    -      -       -      +
    324D  GLU*     4.2    36.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 431 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    444A  ASP*     4.7    12.5    +      -       -      -
    344C  ALA*     5.2    10.8    -      -       -      -
    345C  ILE*     3.7    24.7    -      -       +      +
    348C  ARG*     4.1    19.7    -      -       -      +
    427C  SER      2.9    14.9    +      -       -      +
    428C  ILE      3.9     0.4    -      -       -      +
    430C  LEU*     1.3    76.7    -      -       -      +
    432C  CYS*     1.3    60.2    +      -       -      +
    433C  LEU      3.2     1.2    +      -       -      -
    434C  GLU*     3.5    30.7    +      -       -      +
    435C  HIS*     2.9    53.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with CYS 432 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    306C  ASN*     4.4     3.8    -      -       -      +
    310C  ILE*     4.0    17.5    -      -       +      -
    313C  PHE*     5.6     0.4    -      -       -      -
    345C  ILE*     3.6    25.6    -      -       -      -
    349C  VAL*     5.0     2.7    -      -       -      -
    428C  ILE*     3.1    29.9    +      -       -      +
    429C  GLY      3.3     5.8    +      -       -      +
    430C  LEU      3.2     0.2    -      -       -      -
    431C  LYS*     1.3    74.3    -      -       -      +
    433C  LEU*     1.3    61.3    +      -       -      +
    435C  HIS*     4.1     9.8    -      -       -      +
    436C  LEU*     3.2    29.9    +      -       -      +
   1001C  F15      3.6    33.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 433 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    305C  TRP*     4.5    15.7    -      -       +      -
    306C  ASN*     3.9    22.2    -      -       +      +
    429C  GLY      3.3    15.9    +      -       -      +
    430C  LEU*     3.1    23.3    +      -       +      +
    432C  CYS*     1.3    76.8    -      -       -      +
    434C  GLU*     1.3    68.9    +      -       -      +
    436C  LEU*     3.1     8.7    +      -       +      +
    437C  PHE*     2.8    54.7    +      -       +      -
    455C  LEU*     4.7     7.6    -      -       +      -
    457C  ALA*     6.2     2.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 434 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    438A  PHE*     3.7    13.6    -      -       +      -
    442A  ILE*     3.8    32.3    -      -       +      +
    443A  GLY*     5.2     4.7    -      -       -      -
    444A  ASP*     4.9     8.9    -      -       -      +
    430C  LEU      3.4     8.1    +      -       -      +
    431C  LYS*     3.5    39.9    +      -       -      +
    433C  LEU*     1.3    77.0    -      -       -      +
    435C  HIS*     1.3    67.0    +      -       -      +
    437C  PHE*     3.0    22.7    +      -       +      +
    438C  PHE      3.0    10.6    +      -       -      -
    324D  GLU*     4.0    17.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 435 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    341C  GLY      4.0    13.2    +      -       -      -
    342C  VAL*     3.4    26.7    -      -       +      -
    344C  ALA*     5.8     2.9    -      -       +      +
    345C  ILE*     3.9    24.6    +      -       +      +
    431C  LYS*     2.9    53.0    +      -       +      +
    432C  CYS*     4.2     7.5    -      -       -      +
    433C  LEU      3.3     0.2    -      -       -      -
    434C  GLU*     1.3    81.4    -      -       -      +
    436C  LEU*     1.3    63.1    +      -       -      +
    438C  PHE*     3.0    20.5    +      -       -      +
    439C  PHE*     3.0    32.9    +      +       +      -
   1001C  F15      4.6     6.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 436 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    268C  ILE*     5.2     2.9    -      -       +      -
    269C  CYS*     4.8     7.9    -      -       -      -
    272C  ALA*     5.3     2.2    -      -       +      -
    305C  TRP*     3.9    28.9    -      -       +      -
    306C  ASN*     3.9    11.0    -      -       -      +
    432C  CYS      3.2    21.2    +      -       -      +
    433C  LEU*     3.1    10.6    +      -       +      +
    435C  HIS*     1.3    78.6    -      -       -      +
    437C  PHE*     1.3    61.3    +      -       -      +
    439C  PHE*     3.3    22.2    +      -       +      +
    440C  LYS*     3.3    20.8    +      -       -      +
    447C  ILE*     4.5     4.7    -      -       +      +
    451C  LEU*     4.8    22.9    -      -       +      -
    455C  LEU*     4.5    16.5    -      -       +      +
   1001C  F15      4.0    26.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 437 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    438A  PHE*     4.1    12.8    -      -       +      -
    442A  ILE*     4.8    11.2    -      -       +      -
    433C  LEU*     2.8    56.8    +      -       +      -
    434C  GLU*     3.3     9.9    -      -       +      +
    436C  LEU*     1.3    69.2    -      -       -      +
    438C  PHE*     1.3    62.3    +      -       -      +
    440C  LYS*     3.0     6.6    +      -       +      -
    441C  LEU*     2.8    53.7    +      -       +      +
    455C  LEU*     3.6    25.8    -      -       +      -
    456C  GLU*     4.1    18.4    -      -       -      -
    457C  ALA*     3.5    40.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 438 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    340A  ALA      5.3     0.9    -      -       -      -
    341A  GLY*     3.2    38.4    -      -       -      -
    342A  VAL*     4.0     2.9    -      -       +      -
    435A  HIS*     3.8    22.9    -      +       -      -
    438A  PHE*     3.6    25.7    -      +       +      -
    439A  PHE*     3.7    23.8    -      +       -      -
    434C  GLU      3.0    12.0    +      -       -      +
    435C  HIS*     3.2    12.8    -      -       -      +
    437C  PHE*     1.3    75.6    -      -       -      +
    439C  PHE*     1.3    78.3    +      +       +      +
    442C  ILE*     3.3    35.3    +      -       +      +
    443C  GLY*     3.1    32.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 439 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    341A  GLY*     6.1     3.4    -      -       -      -
    265C  VAL*     3.8    36.8    -      -       +      -
    268C  ILE*     5.1     5.8    -      -       +      -
    269C  CYS*     3.9    19.5    -      -       -      -
    340C  ALA      5.4     2.2    -      -       -      -
    341C  GLY      5.8     0.7    -      -       -      -
    342C  VAL*     4.0    20.9    -      -       +      -
    435C  HIS*     3.0    39.9    +      +       +      -
    436C  LEU*     3.8    18.8    -      -       +      +
    437C  PHE      3.2     0.4    -      -       -      -
    438C  PHE*     1.3    92.1    -      +       -      +
    440C  LYS*     1.3    58.3    +      -       -      +
    443C  GLY*     2.9    21.5    -      -       -      +
    445C  THR*     3.4    31.6    +      -       -      +
    447C  ILE*     4.6     2.5    -      -       +      -
   1001C  F15      4.7    10.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 440 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    436C  LEU      3.3     7.3    +      -       -      +
    437C  PHE*     3.0     9.2    +      -       +      +
    439C  PHE*     1.3    79.6    -      -       -      +
    441C  LEU*     1.3    86.5    +      -       +      +
    442C  ILE      3.4     1.1    +      -       -      +
    443C  GLY      3.9     4.9    -      -       -      +
    445C  THR      4.9     0.4    -      -       -      -
    447C  ILE*     3.1    32.3    -      -       +      +
    452C  MET*     3.3    37.3    +      -       +      +
    455C  LEU*     4.1    31.9    +      -       +      -
    456C  GLU*     4.5    14.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 441 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    431A  LYS*     4.8     2.0    +      -       -      -
    434A  GLU*     3.8    16.8    -      -       -      +
    438A  PHE*     5.5     4.3    -      -       +      -
    437C  PHE*     2.8    41.0    +      -       +      +
    440C  LYS*     1.3   104.4    -      -       +      +
    442C  ILE*     1.3    64.3    +      -       +      +
    456C  GLU      6.1     0.7    -      -       -      +
    459C  HIS*     3.6    36.1    -      -       +      +
    460C  GLN*     4.6    14.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 442 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    431A  LYS*     3.0    28.1    +      -       -      -
    434A  GLU*     4.2    10.8    -      -       +      +
    435A  HIS*     3.1    58.6    -      -       +      +
    438A  PHE*     3.1    47.6    -      -       +      -
    438C  PHE*     3.3    31.0    +      -       +      +
    440C  LYS      3.4     0.4    -      -       -      +
    441C  LEU*     1.3    85.2    -      -       +      +
    443C  GLY*     1.3    70.5    +      -       -      +
    444C  ASP*     3.7     0.2    -      -       -      +
----------------------------------------------------------
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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