Contacts of the helix formed by residues 442 - 464 (chain B) in PDB entry 6MZL


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

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

Legend:
Dist - nearest distance (Å) between atoms of two residues
Surf - contact surface area (Å2) between two residues
HB   - hydrophilic-hydrophilic contact (hydrogen bond)
Arom - aromatic-aromatic contact
Phob - hydrophobic-hydrophobic contact
DC   - hydrophobic-hydrophilic contact (destabilizing contact)
+/-  - indicates presence/absence of a specific contacts
*    - indicates residues forming contacts  by their side chain
       (including CA atoms)
Residues in contact with SER 442 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    405B  TYR*     3.8     5.7    +      -       -      -
    431B  LEU*     5.8     0.2    -      -       -      -
    432B  HIS*     3.9     8.1    +      -       -      -
    441B  LEU*     1.3    74.7    -      -       -      +
    443B  TRP*     1.3    54.2    +      -       -      +
    444B  GLU*     3.1    15.3    +      -       -      +
    445B  TYR*     2.5    38.2    +      -       -      +
    446B  TYR*     2.5    38.9    +      -       -      +
    969B  CYS*     5.1     1.3    -      -       -      -
    973B  ASP*     3.7    32.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with TRP 443 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    182B  TYR*     3.7    31.4    -      +       -      -
    314B  VAL*     3.6    32.8    -      -       +      -
    441B  LEU      5.3     2.0    -      -       -      -
    442B  SER*     1.3    73.0    -      -       -      +
    444B  GLU*     1.3    55.4    +      -       +      +
    446B  TYR*     4.0    27.8    -      +       +      +
    447B  SER*     2.5    42.8    +      -       -      -
    924B  HIS*     3.3    29.6    -      +       +      +
    928B  ASN*     5.5     8.3    -      -       -      +
    966B  ARG*     3.3    50.1    -      -       +      +
    969B  CYS*     5.9     1.1    -      -       +      -
    973B  ASP*     5.2     0.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 444 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    405B  TYR*     3.3    34.0    +      -       +      -
    408B  LYS*     4.6    13.2    +      -       -      +
    442B  SER*     3.1    10.3    +      -       -      +
    443B  TRP*     1.3    77.3    -      -       +      +
    445B  TYR*     1.3    58.8    +      -       -      +
    447B  SER*     2.6    20.3    +      -       -      -
    448B  MET*     3.0    19.2    +      -       +      +
    928B  ASN*     3.6    25.0    -      -       -      +
    931B  THR*     5.4     6.1    -      -       -      +
    932B  LYS*     3.7    24.2    +      -       -      +
    973B  ASP*     6.4     1.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 445 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    405B  TYR*     4.0    16.3    +      +       -      +
    411B  GLY      3.5    22.2    +      -       -      -
    412B  VAL*     3.5    25.9    -      -       +      +
    413B  LEU*     3.1    31.5    +      -       -      +
    428B  ALA*     5.8     4.1    -      -       +      +
    432B  HIS*     4.6    12.3    -      +       +      +
    434B  SER*     4.5    14.1    +      -       -      -
    441B  LEU*     3.6    43.5    -      -       +      -
    442B  SER*     2.5    29.5    +      -       -      +
    444B  GLU*     1.3    74.5    -      -       -      +
    446B  TYR*     1.3    57.1    +      -       -      +
    448B  MET*     3.3     1.4    +      -       -      +
    449B  PHE*     2.9    36.3    +      +       +      +
----------------------------------------------------------
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Residues in contact with TYR 446 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    182B  TYR*     3.2    29.9    -      +       -      +
    183B  GLN*     3.4    14.7    +      -       -      +
    352B  GLN*     5.0     0.3    +      -       -      -
    364B  TRP*     4.1    14.8    -      +       -      -
    371B  LYS*     2.3    40.8    +      -       +      -
    441B  LEU*     5.0     8.5    -      -       +      -
    442B  SER      2.5    19.7    +      -       -      +
    443B  TRP*     4.0    38.4    -      +       +      +
    445B  TYR*     1.3    72.9    -      -       -      +
    447B  SER*     1.3    65.9    +      -       -      +
    449B  PHE*     3.2    14.5    -      +       +      +
    450B  GLN*     3.1    45.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 447 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    401B  LYS*     5.6     4.3    -      -       -      -
    443B  TRP*     2.5    28.2    +      -       -      -
    444B  GLU*     2.6    19.8    +      -       -      -
    446B  TYR*     1.3    79.9    -      -       -      +
    448B  MET*     1.3    70.3    +      -       -      +
    450B  GLN*     3.0    13.4    +      -       -      +
    451B  CYS*     3.0    32.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with MET 448 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    401B  LYS*     3.4    62.4    -      -       +      +
    402B  ILE*     3.8    12.6    -      -       +      -
    405B  TYR*     3.5    25.1    -      -       +      -
    406B  GLU*     6.0     0.7    -      -       +      -
    412B  VAL*     3.9    21.3    -      -       +      -
    444B  GLU*     3.0    16.6    +      -       -      +
    445B  TYR      3.9     0.4    -      -       -      +
    447B  SER*     1.3   103.2    +      -       -      +
    449B  PHE*     1.3    61.7    +      -       -      +
    451B  CYS*     3.6     4.9    -      -       -      +
    452B  LYS*     2.9    34.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 449 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    364B  TRP*     5.4    14.1    -      +       -      -
    367B  GLU*     4.4    11.7    -      -       +      -
    368B  TRP*     3.6    31.4    -      +       +      -
    371B  LYS*     3.8    33.4    -      -       +      -
    412B  VAL*     3.7    16.1    -      -       +      +
    413B  LEU      4.9     3.8    -      -       -      -
    414B  LEU*     3.5    33.6    -      -       +      +
    441B  LEU*     6.4     1.1    -      -       +      -
    445B  TYR*     2.9    22.7    +      +       +      +
    446B  TYR*     3.2    25.6    -      +       -      +
    448B  MET*     1.3    75.7    -      -       -      +
    450B  GLN*     1.3    60.6    +      -       +      +
    452B  LYS*     3.4     3.6    +      -       -      +
    453B  ALA*     3.0    27.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 450 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    348B  GLN*     5.8     2.8    +      -       -      +
    352B  GLN*     3.9    11.3    +      -       -      +
    371B  LYS*     3.6    30.7    -      -       +      +
    446B  TYR*     3.1    45.8    +      -       -      +
    447B  SER*     3.0    12.0    +      -       -      +
    449B  PHE*     1.3    78.8    -      -       +      +
    451B  CYS*     1.3    63.6    +      -       -      +
    453B  ALA*     3.2    10.3    +      -       -      +
    454B  HIS*     3.0    36.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with CYS 451 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    398B  GLU*     3.2    22.6    -      -       -      +
    401B  LYS*     4.1    27.8    -      -       -      -
    402B  ILE*     3.5    22.0    -      -       +      -
    447B  SER*     3.0    23.6    +      -       -      -
    448B  MET*     3.2    11.2    +      -       -      +
    450B  GLN*     1.3    76.8    -      -       -      +
    452B  LYS*     1.3    64.9    +      -       -      +
    454B  HIS*     3.2    14.9    +      -       -      +
    455B  LEU*     3.1    26.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 452 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    402B  ILE*     3.7    25.1    -      -       +      -
    406B  GLU*     3.7    17.0    +      -       -      +
    412B  VAL*     2.4    44.3    +      -       +      +
    413B  LEU*     4.6     0.8    -      -       -      +
    414B  LEU*     5.2    12.9    -      -       +      +
    448B  MET      2.9    14.4    +      -       -      +
    449B  PHE*     3.9     4.3    -      -       -      +
    451B  CYS*     1.3    75.3    -      -       -      +
    453B  ALA*     1.3    57.8    +      -       -      +
    455B  LEU*     4.4     2.7    -      -       -      +
    456B  VAL*     2.9    41.9    +      -       +      +
    522B  TRP*     3.8    18.2    +      -       -      -
    525B  GLN      5.0     0.2    +      -       -      -
    526B  SER*     3.5    24.7    -      -       -      +
    527B  GLY      4.9     0.8    -      -       -      +
    637B  LEU*     4.6    18.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 453 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    368B  TRP*     4.0    13.7    -      -       +      +
    371B  LYS*     3.7     8.1    -      -       +      -
    372B  GLY*     3.4    31.1    -      -       -      +
    414B  LEU*     5.7     5.3    -      -       -      +
    449B  PHE*     3.0    15.5    +      -       +      +
    450B  GLN*     3.2    16.2    -      -       -      +
    451B  CYS      3.1     0.2    -      -       -      -
    452B  LYS*     1.3    76.8    -      -       -      +
    454B  HIS*     1.3    60.8    +      -       -      +
    456B  VAL*     4.1     3.1    -      -       -      +
    457B  MET*     3.2    28.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 454 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    348B  GLN*     5.9     0.4    +      -       -      -
    371B  LYS      5.2     1.1    -      -       -      -
    372B  GLY*     4.6     4.7    -      -       -      -
    375B  GLY*     3.4    41.8    +      -       -      -
    376B  TYR*     4.5     5.9    -      -       -      +
    378B  TYR*     4.1     8.6    +      +       -      -
    394B  TRP*     3.6    29.2    -      +       +      -
    398B  GLU*     3.5    26.8    +      -       -      -
    450B  GLN*     3.0    30.9    +      -       +      +
    451B  CYS*     3.2     9.0    +      -       -      +
    453B  ALA*     1.3    74.2    -      -       -      +
    455B  LEU*     1.3    75.0    +      -       +      +
    457B  MET*     3.2     6.1    +      -       -      +
    458B  ARG*     3.1    26.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 455 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    394B  TRP*     6.1     0.2    -      -       +      -
    395B  ILE*     4.0    14.1    -      -       +      -
    398B  GLU*     4.0    20.4    -      -       +      -
    399B  LEU*     3.8    27.4    -      -       +      -
    402B  ILE*     3.6    25.1    -      -       +      -
    451B  CYS      3.1    12.2    +      -       -      +
    452B  LYS*     4.2     4.0    -      -       -      +
    453B  ALA      3.3     0.4    -      -       -      -
    454B  HIS*     1.3    85.5    -      -       +      +
    456B  VAL*     1.3    59.7    +      -       +      +
    458B  ARG*     3.2    32.8    +      -       -      +
    459B  LEU*     3.0    29.4    +      -       -      +
    635B  SER      5.2     1.0    -      -       -      +
    637B  LEU*     4.1    15.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 456 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    368B  TRP*     4.4     5.6    -      -       +      -
    414B  LEU*     5.2     6.3    -      -       +      -
    452B  LYS*     2.9    30.5    +      -       +      +
    453B  ALA*     4.2     3.6    -      -       -      +
    455B  LEU*     1.3    78.0    -      -       +      +
    457B  MET*     1.3    77.4    +      -       +      +
    459B  LEU*     3.0    13.7    +      -       +      +
    460B  ILE*     3.0    27.6    +      -       +      +
    518B  LEU*     5.5     4.0    -      -       +      -
    522B  TRP*     4.2    29.4    -      -       +      +
    523B  VAL*     4.1    24.2    -      -       +      -
    637B  LEU*     5.7     5.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 457 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    368B  TRP*     3.6    32.8    -      -       +      -
    369B  VAL*     5.0     2.5    -      -       -      -
    372B  GLY*     3.4    23.1    -      -       -      +
    373B  ILE*     3.8    25.1    -      -       +      +
    376B  TYR*     3.7    24.2    -      -       +      -
    453B  ALA      3.2    17.7    +      -       -      +
    454B  HIS      3.6     7.2    -      -       -      +
    456B  VAL*     1.3    81.1    -      -       +      +
    458B  ARG*     1.3    57.9    +      -       -      +
    460B  ILE*     3.1    29.6    +      -       +      +
    461B  GLU*     3.0    22.7    +      -       -      +
    469B  MET*     3.9    11.8    -      -       +      +
    473B  PHE*     5.8     2.5    -      -       -      -
    503B  PHE*     5.4     6.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 458 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    376B  TYR*     4.7    12.2    -      -       +      +
    379B  GLY*     4.9     3.2    -      -       -      -
    391B  TYR*     2.3    49.9    +      -       -      -
    392B  ARG*     4.5     5.8    -      -       -      +
    394B  TRP*     3.7    18.0    -      -       -      -
    395B  ILE*     3.3    35.4    -      -       -      +
    454B  HIS*     3.1    16.1    +      -       -      +
    455B  LEU*     3.2    34.1    +      -       -      +
    457B  MET*     1.3    78.0    -      -       -      +
    459B  LEU*     1.3    56.3    +      -       +      +
    461B  GLU*     3.2    24.7    +      -       -      +
    462B  ASN*     2.7    35.7    +      -       -      +
    633B  ASP      5.9     3.8    -      -       -      +
    634B  MET      5.6     6.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 459 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    455B  LEU      3.0    16.4    +      -       -      +
    456B  VAL*     3.0    15.8    +      -       +      +
    458B  ARG*     1.3    76.2    -      -       -      +
    460B  ILE*     1.3    59.5    +      -       -      +
    462B  ASN*     2.9    33.8    +      -       +      +
    463B  ARG*     3.0    17.2    +      -       -      +
    518B  LEU*     3.8    18.3    -      -       +      +
    522B  TRP*     3.5    45.8    -      -       +      +
    635B  SER*     3.3    37.2    -      -       -      +
    636B  VAL*     5.0     3.8    -      -       +      -
    637B  LEU*     5.5     4.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 460 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    368B  TRP*     5.4     4.7    -      -       +      -
    456B  VAL*     3.0    12.9    +      -       +      +
    457B  MET*     3.1    40.1    +      -       +      +
    459B  LEU*     1.3    72.1    -      -       -      +
    461B  GLU*     1.3    62.0    +      -       -      +
    463B  ARG*     3.8     1.7    -      -       -      +
    464B  ILE*     2.9    47.3    +      -       +      +
    469B  MET*     4.5    13.7    -      -       +      -
    503B  PHE*     5.3     5.4    -      -       +      -
    507B  ILE*     4.9    23.1    -      -       +      -
    515B  ILE*     6.3     2.0    -      -       +      -
    518B  LEU*     3.7    22.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 461 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    376B  TYR*     2.4    44.5    +      -       -      +
    383B  LYS*     3.8    18.9    +      -       -      -
    391B  TYR*     4.5     2.9    +      -       -      -
    392B  ARG*     5.7     3.3    +      -       -      -
    457B  MET      3.0    11.2    +      -       -      +
    458B  ARG*     3.2    23.7    +      -       -      +
    460B  ILE*     1.3    76.9    -      -       -      +
    462B  ASN*     1.3    64.8    +      -       -      +
    463B  ARG      4.0     0.2    -      -       -      -
    464B  ILE      2.8    24.6    +      -       -      +
    466B  MET*     4.4    12.7    -      -       +      +
    469B  MET*     3.6    16.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 462 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    458B  ARG*     2.7    28.4    +      -       -      +
    459B  LEU*     2.9    35.8    +      -       +      +
    461B  GLU*     1.3    80.0    -      -       -      +
    463B  ARG*     1.3    63.1    +      -       +      +
    633B  ASP*     4.9    15.6    +      -       -      +
    634B  MET      5.0     0.2    +      -       -      -
    635B  SER*     3.7    22.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 463 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    459B  LEU      3.0    13.2    +      -       -      +
    460B  ILE*     4.5     2.9    -      -       -      +
    461B  GLU      4.0     0.2    -      -       -      -
    462B  ASN*     1.3    83.1    -      -       +      +
    464B  ILE*     1.3    68.4    +      -       +      +
    513B  LYS*     3.6    26.0    +      -       +      +
    514B  ASP*     2.3    38.8    +      -       -      +
    515B  ILE*     4.1    18.6    -      -       +      -
    517B  PRO*     4.0     6.9    -      -       -      +
    518B  LEU*     3.1    43.1    -      -       +      +
    521B  GLN*     4.1    17.4    +      -       -      +
    564B  LEU*     6.3     0.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 464 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    460B  ILE*     2.9    26.0    +      -       +      +
    461B  GLU*     2.8    23.8    +      -       -      +
    463B  ARG*     1.3    88.2    -      -       +      +
    465B  SER*     1.3    76.6    +      -       -      +
    466B  MET      3.6     0.3    +      -       -      -
    468B  PHE*     3.6    21.3    -      -       +      -
    469B  MET*     4.1     8.1    -      -       +      +
    472B  VAL*     6.2     2.2    -      -       +      -
    507B  ILE*     3.8    30.5    -      -       +      +
    510B  VAL*     5.9     0.7    -      -       +      -
    511B  SER*     4.0    21.8    -      -       -      +
    513B  LYS*     4.4    15.0    -      -       +      +
    515B  ILE*     4.4    15.7    -      -       +      -
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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