Contacts of the helix formed by residues 660 - 683 (chain A) in PDB entry 4EGA


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 ASP 660 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    587A  PHE*     3.6    15.1    -      -       +      -
    655A  TYR*     2.7    20.0    +      -       -      +
    656A  TYR*     4.6     0.2    -      -       -      +
    658A  ILE*     4.2     8.7    -      -       +      -
    659A  PRO*     1.3    73.7    -      -       -      +
    661A  ILE*     1.3    61.2    +      -       -      +
    662A  GLN*     3.2    12.9    +      -       -      +
    663A  LYS*     2.8    58.2    +      -       +      +
    664A  ALA      3.2     9.4    +      -       -      -
    802A  GOL      3.7     6.5    +      -       -      -
    801B  GOL      2.8    31.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 661 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    265A  ILE*     3.9    30.5    -      -       +      +
    268A  VAL*     4.0    32.3    -      -       +      -
    269A  ILE*     4.2    16.2    -      -       +      -
    582A  LEU*     3.8    33.4    -      -       +      -
    656A  TYR*     4.5    12.6    -      -       +      -
    659A  PRO*     5.0     3.4    -      -       +      -
    660A  ASP*     1.3    72.8    -      -       -      +
    662A  GLN*     1.3    63.5    +      -       -      +
    664A  ALA*     3.4     8.0    +      -       -      +
    665A  ILE*     3.0    27.3    +      -       +      +
    716A  ILE*     4.3     9.4    -      -       +      -
    802A  GOL      3.8    20.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 662 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    582A  LEU      3.6    13.7    -      -       -      +
    583A  ARG*     2.6    38.5    +      -       -      +
    584A  GLU      3.6    17.8    +      -       -      -
    585A  SER      3.7    10.2    -      -       -      +
    586A  GLY*     3.5    14.8    -      -       -      +
    660A  ASP*     3.2     9.6    +      -       -      +
    661A  ILE*     1.3    77.0    -      -       -      +
    663A  LYS*     1.3    66.6    +      -       -      +
    665A  ILE*     3.2     7.2    +      -       -      +
    666A  ILE*     3.0    37.2    +      -       +      +
    801A  GOL      4.9     4.9    +      -       -      -
    802A  GOL      3.8    13.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 663 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    655A  TYR*     3.4    42.9    -      -       +      +
    658A  ILE*     5.1     0.4    -      -       +      -
    660A  ASP*     2.8    37.3    +      -       -      +
    662A  GLN*     1.3    78.0    +      -       +      +
    664A  ALA*     1.3    57.7    +      -       -      +
    666A  ILE*     3.2    13.6    +      -       +      +
    667A  ALA*     2.9    29.8    +      -       -      +
    637B  GLU*     4.5     9.6    -      -       -      -
    677B  ALA*     5.5     8.4    -      -       -      +
    681B  ASP*     4.8     5.9    +      -       -      -
    801B  GOL      3.5    20.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 664 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    652A  ALA*     4.2     6.0    -      -       +      +
    655A  TYR*     3.6    25.7    -      -       +      +
    656A  TYR*     4.1    34.5    -      -       +      +
    660A  ASP      3.2     8.1    +      -       -      +
    661A  ILE*     3.7    11.4    -      -       -      +
    663A  LYS*     1.3    77.2    -      -       -      +
    665A  ILE*     1.3    61.4    +      -       +      +
    667A  ALA*     3.3     3.5    +      -       -      +
    668A  VAL*     3.1    29.5    +      -       -      +
    716A  ILE*     5.8     0.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 665 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    579A  TYR*     3.5    28.9    -      -       +      +
    582A  LEU*     3.7    30.1    -      -       +      -
    583A  ARG*     3.8    28.0    -      -       +      +
    661A  ILE*     3.0    17.2    +      -       +      +
    662A  GLN      3.2     5.6    +      -       -      +
    664A  ALA*     1.3    72.2    -      -       -      +
    666A  ILE*     1.3    66.9    +      -       -      +
    668A  VAL*     3.3     4.0    +      -       -      -
    669A  PHE*     3.0    33.1    +      -       +      -
    713A  LEU*     4.5     6.1    -      -       +      -
    716A  ILE*     3.6    35.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 666 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    583A  ARG*     3.6    42.8    -      -       -      +
    662A  GLN*     3.0    31.6    +      -       +      +
    663A  LYS*     3.2    13.4    +      -       +      +
    665A  ILE*     1.3    76.3    -      -       -      +
    667A  ALA*     1.3    58.9    +      -       -      +
    669A  PHE*     3.4     4.4    +      -       -      +
    670A  ASP*     2.9    50.1    +      -       -      +
    673A  ARG*     4.9     4.3    -      -       -      +
    801A  GOL      5.4     2.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 667 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    648A  LEU*     3.8    15.8    -      -       +      +
    651A  THR*     3.9    27.8    -      -       +      -
    652A  ALA*     5.1     1.6    -      -       -      +
    655A  TYR*     4.2     8.7    -      -       +      -
    663A  LYS      2.9    16.1    +      -       -      +
    664A  ALA*     3.7     5.6    -      -       -      +
    665A  ILE      3.2     0.2    -      -       -      -
    666A  ILE*     1.3    78.1    -      -       -      +
    668A  VAL*     1.3    62.5    +      -       -      +
    670A  ASP*     3.4    20.3    -      -       -      +
    671A  VAL*     3.4     6.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 668 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    648A  LEU*     4.0    19.5    -      -       +      -
    652A  ALA*     4.4     5.6    -      -       +      -
    656A  TYR*     6.1     0.9    -      -       +      -
    664A  ALA      3.1    17.5    +      -       -      +
    665A  ILE      3.9     3.4    -      -       -      +
    667A  ALA*     1.3    76.4    -      -       -      +
    669A  PHE*     1.3    57.3    +      -       -      +
    671A  VAL*     2.9    20.4    +      -       -      +
    672A  LEU*     3.0    12.5    +      -       +      +
    709A  THR*     3.6    38.1    -      -       +      +
    712A  LEU*     4.0    25.8    -      -       +      +
    713A  LEU*     3.6    26.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 669 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    579A  TYR*     3.5    32.1    -      +       -      -
    583A  ARG*     6.2     1.3    -      -       -      +
    605A  GLU*     3.4    44.0    -      -       +      -
    606A  LEU*     4.2    11.9    -      -       +      -
    609A  THR*     4.1    13.2    -      -       +      -
    610A  LEU*     4.4     5.2    -      -       +      -
    665A  ILE*     3.0    29.5    +      -       +      +
    666A  ILE*     4.0     4.0    -      -       -      +
    668A  VAL*     1.3    73.3    -      -       -      +
    670A  ASP*     1.3    59.8    +      -       -      +
    672A  LEU*     3.5    24.4    -      -       +      +
    673A  ARG*     2.8    50.4    +      -       -      +
    713A  LEU*     3.8    28.7    -      -       +      -
    717A  LEU*     5.4     0.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 670 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    644A  LEU*     5.6     0.2    -      -       -      +
    666A  ILE*     2.9    32.3    +      -       -      +
    667A  ALA*     3.4    14.0    -      -       -      +
    668A  VAL      3.2     0.4    -      -       -      -
    669A  PHE*     1.3    76.2    -      -       -      +
    671A  VAL*     1.3    62.8    +      -       +      +
    673A  ARG*     2.7    37.9    +      -       -      +
    674A  ALA*     3.3    19.8    +      -       -      +
    670B  ASP*     5.3     5.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 671 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    641A  LEU*     5.0     1.3    -      -       +      -
    644A  LEU*     4.0    31.9    -      -       +      +
    645A  ILE*     4.2    19.5    -      -       +      +
    648A  LEU*     3.9    20.4    -      -       +      -
    667A  ALA      3.4    10.5    +      -       -      +
    668A  VAL      2.9     9.8    +      -       -      +
    670A  ASP*     1.3    76.3    -      -       +      +
    672A  LEU*     1.3    60.3    +      -       -      +
    674A  ALA*     3.2     6.2    +      -       -      +
    675A  ILE*     2.9    43.5    +      -       +      +
    709A  THR*     3.9    11.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 672 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    609A  THR*     3.6    13.0    -      -       +      -
    610A  LEU*     4.0    31.4    -      -       +      -
    613A  LEU*     3.8    22.1    -      -       +      +
    668A  VAL*     3.0    13.0    +      -       +      +
    669A  PHE*     3.1    45.0    +      -       +      +
    671A  VAL*     1.3    77.0    -      -       -      +
    673A  ARG*     1.3    62.5    +      -       -      +
    675A  ILE*     3.2     8.8    +      -       +      +
    676A  ASN*     3.1    27.2    +      -       -      -
    706A  VAL*     5.0     2.2    -      -       -      -
    709A  THR*     3.2    30.5    -      -       +      +
    713A  LEU*     4.2     9.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 673 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    605A  GLU*     4.9     9.9    -      -       -      +
    609A  THR*     4.4    18.3    +      -       +      +
    666A  ILE*     4.1     7.1    +      -       -      +
    669A  PHE*     2.8    33.9    +      -       -      +
    670A  ASP*     2.7    42.9    +      -       -      +
    672A  LEU*     1.3    76.5    -      -       -      +
    674A  ALA*     1.3    61.2    +      -       -      +
    676A  ASN*     3.2     8.2    +      -       -      +
    677A  ALA*     3.0    21.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 674 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    641A  LEU*     4.1     8.0    -      -       +      +
    644A  LEU*     3.7    29.8    -      -       +      -
    670A  ASP      3.3     9.1    +      -       -      +
    671A  VAL      3.2    10.0    +      -       -      +
    673A  ARG*     1.3    78.4    -      -       -      +
    675A  ILE*     1.3    56.3    +      -       -      +
    677A  ALA*     3.1     9.1    +      -       -      +
    678A  TYR*     2.8    29.8    +      -       -      +
    655B  TYR*     5.7     0.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 675 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    613A  LEU*     3.4    22.7    -      -       +      -
    641A  LEU*     3.8    28.7    -      -       +      -
    645A  ILE*     4.8     0.9    -      -       +      -
    671A  VAL*     2.9    36.8    +      -       +      +
    672A  LEU*     3.2    19.2    +      -       +      +
    674A  ALA*     1.3    75.5    -      -       -      +
    676A  ASN*     1.3    56.8    +      -       -      +
    678A  TYR*     3.2     4.0    +      -       -      +
    679A  VAL*     2.9    29.1    +      -       +      +
    702A  THR*     4.4    25.4    -      -       +      +
    705A  GLY*     3.8    33.9    -      -       -      +
    706A  VAL      4.2     0.9    -      -       -      +
    709A  THR*     4.3     0.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 676 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    608A  ASP      4.2     3.5    -      -       -      +
    609A  THR*     3.0    37.6    +      -       -      +
    612A  ASN*     3.2    14.0    -      -       -      +
    613A  LEU*     3.3    15.9    -      -       -      +
    616A  ARG*     3.2    22.7    +      -       -      +
    672A  LEU      3.1    23.2    +      -       -      -
    673A  ARG*     3.5     9.2    -      -       -      +
    675A  ILE*     1.3    75.6    -      -       -      +
    677A  ALA*     1.3    57.0    +      -       -      +
    679A  VAL*     3.1     3.9    +      -       -      +
    680A  THR*     2.9    33.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 677 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    673A  ARG      3.0    11.7    +      -       -      +
    674A  ALA*     3.3    12.6    -      -       -      +
    676A  ASN*     1.3    73.2    -      -       -      +
    678A  TYR*     1.3    68.5    +      -       -      +
    680A  THR*     3.2     7.2    +      -       -      -
    681A  ASP*     3.0    31.6    +      -       -      +
    663B  LYS*     5.8     8.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 678 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    637A  GLU*     4.0    24.0    -      -       +      -
    638A  ASP*     2.4    46.9    +      -       -      -
    641A  LEU*     3.3    34.1    -      -       +      -
    674A  ALA      2.8    13.2    +      -       -      +
    675A  ILE*     3.3     9.4    -      -       +      +
    677A  ALA*     1.3    77.2    -      -       -      +
    679A  VAL*     1.3    65.5    +      -       +      +
    681A  ASP*     3.2     5.1    +      -       -      +
    682A  MET*     3.0    47.1    +      -       +      +
    698A  VAL*     3.5    39.3    -      -       +      +
    701A  ILE*     3.6    20.3    -      -       +      +
    702A  THR*     4.4     2.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 679 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    613A  LEU*     4.5     4.3    -      -       +      -
    616A  ARG*     3.8    37.0    -      -       +      +
    675A  ILE*     2.9    22.6    +      -       +      +
    676A  ASN*     3.1     6.0    +      -       -      +
    678A  TYR*     1.3    78.9    -      -       +      +
    680A  THR*     1.3    58.9    +      -       -      +
    682A  MET*     4.7     1.8    -      -       -      -
    683A  ALA*     2.8    26.5    +      -       -      -
    684A  PRO*     3.2    24.3    -      -       +      +
    685A  TRP*     4.1     2.7    -      -       +      -
    698A  VAL*     5.2     3.6    -      -       +      -
    702A  THR*     3.4    35.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with THR 680 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    616A  ARG*     4.1    15.8    +      -       -      -
    676A  ASN*     2.9    15.4    +      -       -      +
    677A  ALA*     3.6     9.9    -      -       -      +
    679A  VAL*     1.3    73.4    -      -       -      +
    681A  ASP*     1.3    71.0    +      -       -      +
    682A  MET      3.3     0.3    +      -       -      -
    683A  ALA*     3.4    13.7    +      -       -      +
    685A  TRP*     4.3    14.3    -      -       +      -
    434B  ARG*     5.1     1.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 681 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    637A  GLU*     3.1    28.9    -      -       -      +
    677A  ALA*     3.0    19.2    +      -       -      +
    678A  TYR      3.4     9.0    -      -       -      +
    680A  THR*     1.3    79.9    -      -       -      +
    682A  MET*     1.3    66.0    +      -       +      +
    429B  PRO*     5.8     3.5    -      -       -      +
    430B  GLU*     3.4    14.2    +      -       +      +
    431B  PHE*     4.8     1.6    +      -       -      +
    434B  ARG*     3.0    24.8    +      -       -      -
    587B  PHE*     6.0     2.3    -      -       -      -
    663B  LYS*     4.6     8.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with MET 682 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    637A  GLU*     3.4    44.4    -      -       +      +
    678A  TYR*     3.0    32.5    +      -       +      +
    679A  VAL      4.1     2.5    -      -       -      +
    681A  ASP*     1.3    86.6    -      -       +      +
    683A  ALA*     1.3    72.5    +      -       -      +
    684A  PRO*     3.1     1.5    -      -       +      -
    687A  LEU*     3.4    17.5    -      -       +      +
    694A  ARG*     3.8    25.1    -      -       -      +
    698A  VAL*     3.9    28.7    -      -       +      -
    430B  GLU*     3.9    33.1    -      -       +      +
    434B  ARG*     4.3     5.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 683 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    679A  VAL      2.8    12.6    +      -       -      -
    680A  THR      3.4     6.6    +      -       -      +
    682A  MET*     1.3    80.0    -      -       -      +
    684A  PRO*     1.3    58.2    -      -       -      +
    685A  TRP*     3.1    32.1    -      -       +      +
    686A  LYS*     2.8    34.3    +      -       +      +
    687A  LEU*     3.3     6.4    +      -       -      +
    434B  ARG*     4.0    23.8    -      -       -      +
----------------------------------------------------------
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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