Contacts of the helix formed by residues 631 - 657 (chain B) in PDB entry 4PE5


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 MET 631 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    630B  ILE*     1.3    75.3    -      -       -      +
    632B  VAL*     1.3    62.1    +      -       -      +
    633B  SER      3.2     3.2    +      -       -      -
    634B  VAL*     3.8    15.2    +      -       -      +
    635B  TRP*     4.2     2.8    +      -       -      +
    824C  ILE*     5.9     5.3    -      -       -      +
    827C  GLY*     5.9     8.3    -      -       -      +
    828C  ILE*     6.5     0.4    -      -       -      -
    831C  ILE*     6.3     2.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 632 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    630B  ILE*     3.2     2.6    -      -       -      +
    631B  MET*     1.3    77.9    -      -       -      +
    633B  SER*     1.3    58.7    +      -       -      +
    634B  VAL      3.2     0.4    -      -       -      -
    635B  TRP*     2.9    14.8    +      -       +      +
    636B  ALA*     2.9    26.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 633 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    630B  ILE*     3.6    19.5    +      -       -      +
    631B  MET      3.2     0.2    -      -       -      -
    632B  VAL*     1.3    78.1    -      -       -      +
    634B  VAL*     1.3    62.3    +      -       -      +
    636B  ALA*     2.9    11.6    +      -       -      +
    637B  PHE*     2.9    21.4    +      -       -      +
    611C  TRP*     4.8    23.6    -      -       -      -
    612C  GLY*     6.0     1.1    -      -       -      -
    615C  LEU*     3.9     5.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 634 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    631B  MET      3.8    11.4    +      -       -      +
    632B  VAL      3.2     0.2    -      -       -      -
    633B  SER*     1.3    76.2    -      -       -      +
    635B  TRP*     1.3    59.9    +      -       -      +
    637B  PHE*     2.9    24.5    +      -       -      +
    638B  PHE*     3.0    15.1    +      -       -      +
    820C  VAL*     5.7     8.1    -      -       +      +
    823C  GLY      6.0     2.7    -      -       -      -
    824C  ILE*     5.9     8.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with TRP 635 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    569B  VAL*     6.0     5.6    -      -       +      -
    612B  LEU*     6.0     1.1    -      -       -      -
    631B  MET      4.2     2.1    +      -       -      +
    632B  VAL*     2.9    21.5    +      -       +      +
    634B  VAL*     1.3    79.8    -      -       -      +
    636B  ALA*     1.3    55.7    +      -       -      +
    638B  PHE*     3.9     6.9    +      -       -      +
    639B  ALA*     3.1    24.9    +      -       -      +
    820C  VAL*     6.1     2.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 636 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    612B  LEU*     4.8    19.4    -      -       +      +
    632B  VAL      2.9    11.7    +      -       -      +
    633B  SER*     2.9    13.0    +      -       -      +
    635B  TRP*     1.3    75.2    -      -       -      +
    637B  PHE*     1.3    54.1    +      -       -      +
    639B  ALA*     2.9     9.3    +      -       -      +
    640B  VAL*     2.7    34.7    +      -       -      +
    615C  LEU*     3.6    21.0    -      -       +      +
    616C  ASN      5.3     3.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 637 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    633B  SER      2.9    11.8    +      -       -      +
    634B  VAL*     2.9    13.2    +      -       -      +
    636B  ALA*     1.3    75.1    -      -       -      +
    638B  PHE*     1.3    63.4    +      -       -      +
    640B  VAL*     2.9    18.2    +      -       -      +
    641B  ILE*     3.0    12.5    +      -       -      +
    615C  LEU*     3.8    18.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 638 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    634B  VAL      3.0    14.2    +      -       -      +
    635B  TRP*     4.0     7.2    -      -       -      +
    637B  PHE*     1.3    74.8    -      -       -      +
    639B  ALA*     1.3    51.9    +      -       -      +
    641B  ILE*     2.9    11.3    +      -       -      +
    642B  PHE*     2.7    33.9    +      -       -      +
    816C  VAL*     5.5     4.9    -      -       +      +
    820C  VAL*     4.3    23.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 639 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    612B  LEU      3.6    23.1    -      -       -      +
    613B  VAL*     3.7    23.6    -      -       +      +
    635B  TRP      3.1    14.2    +      -       -      +
    636B  ALA*     2.9    10.2    +      -       -      +
    638B  PHE*     1.3    77.8    -      -       -      +
    640B  VAL*     1.3    57.5    +      -       -      +
    642B  PHE*     2.9    11.8    +      -       -      +
    643B  LEU*     2.8    28.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 640 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    636B  ALA      2.7    15.3    +      -       -      +
    637B  PHE*     2.9    13.9    +      -       -      +
    639B  ALA*     1.3    72.7    -      -       -      +
    641B  ILE*     1.3    63.3    +      -       -      +
    643B  LEU*     2.9    11.1    +      -       -      +
    644B  ALA*     2.9    21.0    +      -       -      +
    614C  LEU      5.8     1.3    -      -       -      +
    615C  LEU*     4.9    11.9    -      -       -      +
    616C  ASN*     5.5     4.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 641 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    637B  PHE      3.0    10.3    +      -       -      +
    638B  PHE*     2.9    13.5    +      -       -      +
    640B  VAL*     1.3    75.3    -      -       -      +
    642B  PHE*     1.3    63.5    +      -       -      +
    644B  ALA*     2.9    19.6    +      -       -      +
    645B  SER*     3.0    16.3    +      -       -      -
    554C  PHE*     6.2     4.9    -      -       +      -
    647C  TYR*     4.2    23.7    -      -       +      +
    816C  VAL*     6.3     3.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 642 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    613B  VAL      5.7     1.3    -      -       -      +
    638B  PHE      2.7    16.1    +      -       -      +
    639B  ALA*     3.2    15.7    -      -       -      +
    641B  ILE*     1.3    72.6    -      -       -      +
    643B  LEU*     1.3    57.6    +      -       -      +
    645B  SER*     4.3     5.0    -      -       -      -
    646B  TYR*     3.2    23.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 643 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    613B  VAL      5.0     7.6    +      -       -      +
    614B  PHE*     6.1     2.0    -      -       -      +
    639B  ALA      2.8    12.0    +      -       -      +
    640B  VAL*     2.9    13.4    +      -       -      +
    642B  PHE*     1.3    76.3    -      -       -      +
    644B  ALA*     1.3    65.5    +      -       -      +
    646B  TYR*     2.9    17.8    +      -       -      +
    647B  THR*     3.0    17.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 644 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    640B  VAL      2.9    11.3    +      -       -      +
    641B  ILE      2.9     7.8    +      -       -      +
    643B  LEU*     1.3    74.5    -      -       -      +
    645B  SER*     1.3    52.9    +      -       -      +
    647B  THR*     2.9     9.8    +      -       -      -
    648B  ALA*     2.7    35.5    +      -       -      +
    644C  VAL      5.6     0.4    -      -       -      +
    647C  TYR*     3.6    33.4    -      -       +      -
    648C  THR*     4.4    20.2    -      -       -      -
    651C  LEU*     5.4     2.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 645 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    641B  ILE      3.0    14.0    +      -       -      -
    642B  PHE*     4.3     5.6    -      -       -      -
    644B  ALA*     1.3    75.9    -      -       -      +
    646B  TYR*     1.3    58.2    +      -       -      +
    647B  THR      2.9     3.1    +      -       -      -
    648B  ALA*     2.9     7.6    +      -       -      -
    649B  ASN*     2.8    36.6    +      -       -      +
    647C  TYR*     5.4     0.6    -      -       -      -
    651C  LEU*     5.5     3.5    -      -       -      +
    808C  LEU*     5.9     4.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 646 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    645A  ALA*     4.1    13.9    -      -       +      +
    553B  PRO*     5.2     5.0    -      -       -      +
    642B  PHE      3.2    19.2    +      -       -      +
    643B  LEU*     2.9    11.3    +      -       -      +
    645B  SER*     1.3    78.3    -      -       -      +
    647B  THR*     1.3    56.6    +      -       -      +
    649B  ASN*     5.2     2.2    -      -       -      -
    650B  LEU*     3.5    19.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 647 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    645A  ALA*     4.3    19.6    -      -       -      +
    648A  THR*     3.9    27.4    -      -       -      -
    649A  ALA*     4.5     4.8    -      -       -      +
    643B  LEU      3.0    10.0    +      -       -      -
    644B  ALA*     2.9     9.5    +      -       -      -
    646B  TYR*     1.3    78.4    -      -       -      +
    648B  ALA*     1.3    67.5    +      -       -      +
    649B  ASN      3.4     0.2    -      -       -      -
    650B  LEU*     3.0    15.4    +      -       -      +
    651B  ALA*     3.0    14.0    +      -       +      +
    648C  THR*     5.7     7.6    -      -       -      -
    647D  THR*     6.1     3.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 648 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    644B  ALA      2.7    19.0    +      -       -      +
    645B  SER*     3.7     5.8    -      -       -      +
    647B  THR*     1.3    73.0    -      -       -      +
    649B  ASN*     1.3    64.4    +      -       -      +
    651B  ALA*     2.9    17.0    +      -       -      +
    652B  ALA*     3.0    11.2    +      -       -      +
    648C  THR*     4.2     3.4    -      -       -      +
    651C  LEU*     3.7    19.1    -      -       +      +
    652C  ALA*     3.7    40.0    -      -       +      +
    655C  LEU*     5.3     2.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 649 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    553B  PRO*     3.7    22.1    -      -       +      +
    645B  SER*     2.8    21.6    +      -       -      +
    646B  TYR*     5.2     0.9    -      -       -      -
    648B  ALA*     1.3    73.3    -      -       -      +
    650B  LEU*     1.3    49.3    +      -       -      +
    652B  ALA*     2.9    11.4    +      -       -      +
    653B  PHE*     2.6    35.7    +      -       -      +
    655C  LEU*     5.5     4.0    -      -       -      +
    807C  THR      5.6     0.4    -      -       -      -
    808C  LEU*     4.1    24.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 650 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    645A  ALA*     4.7     6.1    -      -       +      +
    646A  SER*     5.9     0.7    -      -       -      -
    649A  ALA*     3.9    17.5    -      -       +      -
    553B  PRO*     3.5    20.4    -      -       +      +
    646B  TYR      3.5    16.4    +      -       -      +
    647B  THR*     3.0    13.0    +      -       -      +
    649B  ASN*     1.3    75.8    -      -       -      +
    651B  ALA*     1.3    58.2    +      -       -      +
    653B  PHE*     2.9     4.9    +      -       -      +
    654B  MET*     2.8    28.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 651 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    649A  ALA*     3.9    20.3    -      -       +      +
    652A  ALA*     4.7    14.4    -      -       +      -
    653A  ALA*     5.8     1.2    -      -       +      +
    647B  THR*     3.0    11.0    +      -       +      +
    648B  ALA*     2.9    13.3    +      -       -      +
    650B  LEU*     1.3    74.7    -      -       -      +
    652B  ALA*     1.3    62.6    +      -       -      +
    654B  MET*     2.9    16.6    +      -       -      +
    655B  ILE*     2.9    14.8    +      -       -      +
    652C  ALA*     5.0    10.8    -      -       +      +
    656C  VAL*     5.4     5.6    -      -       +      -
    651D  ALA*     6.4     0.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 652 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    648B  ALA      3.0     9.5    +      -       -      +
    649B  ASN*     2.9    14.7    +      -       -      +
    651B  ALA*     1.3    75.8    -      -       -      +
    653B  PHE*     1.3    58.8    +      -       -      +
    655B  ILE*     2.9     7.4    +      -       -      +
    656B  GLN*     2.9    30.3    +      -       -      +
    655C  LEU*     4.2    17.0    -      -       +      +
    656C  VAL*     4.2    11.8    -      -       +      +
    805C  PRO*     3.5    29.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 653 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    552B  GLU*     5.3     5.2    -      -       +      -
    553B  PRO*     3.9    23.1    -      -       +      -
    649B  ASN      2.6    15.9    +      -       -      +
    650B  LEU      3.4     8.5    -      -       -      +
    652B  ALA*     1.3    72.4    -      -       -      +
    654B  MET*     1.3    58.0    +      -       -      +
    656B  GLN*     4.1     2.2    -      -       -      -
    657B  GLU*     3.8    22.0    +      -       -      +
    805C  PRO      4.1     8.9    +      -       -      -
    806C  ALA      4.4    13.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with MET 654 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    649A  ALA*     4.9     7.2    -      -       +      +
    650A  ASN*     6.1     0.4    -      -       -      -
    653A  ALA*     4.5    22.8    -      -       +      +
    650B  LEU      2.8    11.2    +      -       -      +
    651B  ALA*     2.9    14.3    +      -       -      +
    653B  PHE*     1.3    78.9    -      -       -      +
    655B  ILE*     1.3    58.1    +      -       -      +
    656B  GLN      3.4     0.7    -      -       -      -
    657B  GLU      4.2    10.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 655 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    651B  ALA      2.9    13.3    +      -       -      +
    652B  ALA*     2.9     8.2    +      -       -      +
    654B  MET*     1.3    77.2    -      -       -      +
    656B  GLN*     1.3    64.6    +      -       -      +
    657B  GLU      4.9     0.7    -      -       -      -
    656C  VAL*     4.9    17.0    -      -       +      +
    805C  PRO*     5.2     2.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 656 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    652B  ALA      2.9     9.1    +      -       -      +
    653B  PHE*     4.5     3.1    -      -       -      +
    654B  MET      3.4     0.2    -      -       -      -
    655B  ILE*     1.3    81.1    -      -       -      +
    657B  GLU*     1.3    68.2    +      -       +      +
    658B  GLU*     3.4     6.1    +      -       -      +
    803C  ASN*     3.4    30.0    -      -       +      +
    805C  PRO*     3.5    43.5    -      -       +      +
    806C  ALA*     5.3     0.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 657 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    653B  PHE      3.8    14.3    +      -       -      +
    654B  MET*     4.2    12.0    -      -       -      +
    655B  ILE      4.9     0.3    -      -       -      -
    656B  GLN*     1.3    80.0    -      -       +      +
    658B  GLU*     1.3    59.8    +      -       -      +
    659B  TYR*     3.7     8.4    +      -       +      +
    803C  ASN*     3.8     8.5    -      -       +      +
----------------------------------------------------------
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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