Contacts of the helix formed by residues 661 - 684 (chain A) in PDB entry 5IYB


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 GLY 661 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    656A  SER      3.4     1.4    +      -       -      -
    657A  TYR      3.4    17.7    +      -       -      -
    658A  LEU      5.3     0.7    -      -       -      -
    659A  GLU      3.5     1.2    -      -       -      -
    660A  MET*     1.3    79.5    -      -       -      +
    662A  HIS*     1.3    67.3    +      -       -      -
    663A  ASP      3.3     2.2    -      -       -      -
    664A  ILE      3.0    15.0    +      -       -      -
    665A  THR*     3.1    13.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with HIS 662 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    522A  PRO*     3.2    43.2    -      -       +      +
    523A  ARG*     3.5    42.6    +      -       -      -
    525A  ILE*     4.3     2.6    -      -       -      +
    657A  TYR*     3.5    28.0    +      -       +      +
    661A  GLY*     1.3    71.9    -      -       -      -
    663A  ASP*     1.3    77.1    +      -       +      +
    665A  THR*     3.3     2.9    +      -       -      -
    666A  ARG*     2.8    30.0    +      -       -      +
    127F  ASP*     5.5     2.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 663 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    522A  PRO*     5.3     0.2    -      -       -      -
    661A  GLY      3.1     1.2    +      -       -      -
    662A  HIS*     1.3    96.4    +      -       +      +
    664A  ILE*     1.3    63.9    +      -       +      +
    666A  ARG*     3.1    22.2    -      -       -      +
    667A  LEU*     3.1    21.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 664 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    597A  PRO*     3.7    24.0    -      -       +      -
    660A  MET*     3.4    57.4    -      -       +      +
    661A  GLY      3.0     4.2    +      -       -      +
    663A  ASP*     1.3    74.7    -      -       +      +
    665A  THR*     1.3    61.4    +      -       -      +
    667A  LEU*     3.3     9.5    +      -       +      +
    668A  PHE*     2.9    26.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 665 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    525A  ILE*     3.8    18.8    -      -       +      -
    653A  VAL      4.2    14.8    -      -       -      +
    656A  SER*     3.6     7.1    +      -       -      -
    657A  TYR*     3.2    30.6    +      -       +      -
    661A  GLY      3.1    10.4    +      -       -      -
    662A  HIS*     3.7     7.9    -      -       -      -
    664A  ILE*     1.3    75.4    -      -       -      +
    666A  ARG*     1.3    57.2    -      -       -      +
    668A  PHE*     3.3    15.1    +      -       +      +
    669A  TYR*     2.9    53.1    +      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 666 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    374A  SER*     4.8     5.3    +      -       -      +
    375A  ILE*     3.0    47.9    -      -       -      +
    376A  ASP*     4.5     9.4    -      -       -      +
    473A  ARG*     6.0     0.4    -      -       -      +
    521A  VAL*     2.5    44.1    +      -       -      +
    522A  PRO*     2.9    37.2    -      -       +      +
    525A  ILE*     3.2    20.7    -      -       -      +
    535A  MET*     3.6    12.5    -      -       -      +
    662A  HIS      2.8    10.8    +      -       -      +
    663A  ASP*     3.1    20.0    -      -       -      +
    665A  THR*     1.3    77.3    -      -       -      +
    667A  LEU*     1.3    64.5    +      -       +      +
    669A  TYR*     3.3    18.7    +      -       -      +
    670A  SER*     3.4    15.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 667 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    374A  SER*     5.9     3.1    -      -       -      +
    568A  SER*     4.2    15.5    -      -       -      +
    569A  THR*     3.7    25.1    -      -       +      +
    663A  ASP*     3.1    22.5    +      -       -      +
    664A  ILE*     3.3    10.1    +      -       +      +
    666A  ARG*     1.3    79.5    -      -       +      +
    668A  PHE*     1.3    55.9    +      -       -      +
    670A  SER*     3.5     6.9    +      -       -      -
    671A  ASN*     2.6    46.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 668 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    592A  PHE*     5.4     0.2    -      +       -      -
    595A  ILE*     3.4    42.8    -      -       +      +
    596A  ILE*     3.7    17.5    -      -       +      -
    597A  PRO*     4.1    15.3    -      -       +      -
    600A  ILE*     5.4     0.4    -      -       +      -
    645A  LEU*     5.0     0.9    -      -       +      -
    652A  LEU*     4.2    26.9    -      -       +      -
    653A  VAL*     4.0    25.4    -      -       +      -
    656A  SER*     4.0    18.8    -      -       -      -
    664A  ILE*     2.9    17.5    +      -       +      +
    665A  THR*     3.6    11.4    -      -       +      +
    666A  ARG      3.2     0.2    -      -       -      -
    667A  LEU*     1.3    76.5    -      -       -      +
    669A  TYR*     1.3    64.0    +      +       -      +
    671A  ASN*     3.3     2.0    +      -       -      +
    672A  ILE*     2.9    41.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 669 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    375A  ILE*     3.5    23.8    -      -       +      -
    487A  SER*     4.0    22.9    -      -       -      -
    525A  ILE*     4.3    10.4    -      -       +      +
    535A  MET*     2.2    55.8    +      -       +      +
    536A  GLY*     4.7     0.9    -      -       -      -
    537A  ILE*     4.3    18.6    -      -       +      -
    653A  VAL*     3.4    38.1    -      -       +      +
    665A  THR*     2.9    43.9    +      -       +      -
    666A  ARG*     3.3     8.5    +      -       -      +
    668A  PHE*     1.3    74.9    -      +       -      +
    670A  SER*     1.3    64.0    +      -       -      +
    672A  ILE*     3.2    21.2    -      -       +      +
    673A  GLN*     3.5    14.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 670 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    371A  PRO      5.7     0.6    -      -       -      +
    373A  LEU      4.1     3.5    +      -       -      -
    374A  SER*     3.1    35.9    +      -       -      -
    375A  ILE*     3.5    12.7    +      -       -      +
    485A  ASN*     5.1     1.8    -      -       -      +
    666A  ARG      3.4     9.1    +      -       -      -
    667A  LEU*     4.1     9.9    -      -       -      -
    669A  TYR*     1.3    76.8    -      -       -      +
    671A  ASN*     1.3    64.2    +      -       -      +
    673A  GLN*     3.3     7.1    +      -       -      +
    674A  THR*     3.1    28.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 671 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    566A  PHE      4.3     1.7    -      -       -      +
    567A  LEU*     3.3    21.3    -      -       +      -
    568A  SER*     2.6    52.8    +      -       -      -
    569A  THR*     4.2     6.9    +      -       -      -
    595A  ILE*     4.7    11.2    -      -       +      +
    667A  LEU*     2.6    37.7    +      -       -      +
    668A  PHE*     3.8     4.4    -      -       -      +
    670A  SER*     1.3    74.3    -      -       -      +
    672A  ILE*     1.3    65.9    +      -       -      +
    674A  THR*     3.3     4.7    +      -       -      +
    675A  VAL*     3.0    30.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 672 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    537A  ILE*     3.9    25.8    -      -       +      -
    541A  THR*     5.3     2.9    -      -       +      -
    545A  VAL*     5.1     1.1    -      -       +      -
    592A  PHE*     3.9    25.6    -      -       +      -
    595A  ILE*     4.1     6.2    -      -       +      +
    645A  LEU*     3.7    38.4    -      -       +      -
    653A  VAL*     6.3     0.2    -      -       +      -
    668A  PHE*     2.9    35.1    +      -       +      +
    669A  TYR*     3.2    17.7    -      -       -      +
    671A  ASN*     1.3    75.4    -      -       -      +
    673A  GLN*     1.3    66.7    +      -       -      +
    675A  VAL*     3.4     5.7    -      -       -      +
    676A  ILE*     3.1    36.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 673 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    371A  PRO*     4.2    19.5    -      -       +      +
    375A  ILE*     4.0     2.2    -      -       -      +
    485A  ASN*     3.2    40.0    +      -       -      +
    486A  LEU*     4.7     6.2    +      -       -      +
    487A  SER*     3.5    21.4    +      -       -      -
    537A  ILE*     4.5     8.5    -      -       +      +
    541A  THR*     3.8    26.2    +      -       +      +
    669A  TYR*     3.6    14.5    +      -       -      +
    670A  SER*     3.3     7.1    +      -       -      +
    671A  ASN      3.3     0.6    -      -       -      -
    672A  ILE*     1.3    80.7    -      -       +      +
    674A  THR*     1.3    54.3    +      -       -      +
    677A  ASN*     2.5    49.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 674 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    371A  PRO*     4.8    10.0    +      -       -      -
    372A  ASN*     5.1    13.3    +      -       -      +
    566A  PHE*     3.5    43.7    -      -       +      +
    670A  SER*     3.1    18.7    +      -       -      -
    671A  ASN*     3.3     5.8    +      -       -      -
    673A  GLN*     1.3    75.0    -      -       -      +
    675A  VAL*     1.3    65.4    +      -       -      +
    677A  ASN*     4.8     2.9    -      -       -      -
    678A  ASN*     2.7    34.9    +      -       -      +
     62K  LYS*     6.0     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 675 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    548A  PHE*     6.0     2.5    -      -       +      -
    563A  LEU*     3.7    36.4    -      -       +      +
    566A  PHE*     4.9     4.0    -      -       +      -
    567A  LEU*     4.3    20.6    -      -       +      +
    591A  ILE*     6.0     4.3    -      -       +      -
    592A  PHE*     5.8     1.1    -      -       +      -
    595A  ILE*     3.4    34.5    -      -       +      -
    671A  ASN*     3.0    19.3    +      -       -      +
    672A  ILE*     3.4     7.6    -      -       -      +
    674A  THR*     1.3    76.6    -      -       -      +
    676A  ILE*     1.3    81.0    +      -       +      +
    679A  TRP*     3.1    28.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 676 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    541A  THR*     3.8    19.1    -      -       +      +
    544A  ALA*     3.6    12.6    -      -       +      +
    545A  VAL*     3.6    42.0    -      -       +      +
    548A  PHE*     3.4    43.3    -      -       +      -
    592A  PHE*     4.5     6.5    -      -       +      -
    672A  ILE*     3.1    28.1    +      -       +      +
    673A  GLN      3.9     0.9    -      -       -      +
    675A  VAL*     1.3    89.5    -      -       +      +
    677A  ASN*     1.3    63.9    +      -       -      +
    679A  TRP*     4.1     3.2    -      -       +      +
    680A  LEU*     3.2    20.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 677 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    371A  PRO*     4.6    16.0    -      -       +      +
    541A  THR*     3.2    27.3    +      -       -      +
    673A  GLN*     2.5    51.5    +      -       -      +
    674A  THR*     4.4     3.8    -      -       -      +
    676A  ILE*     1.3    68.2    -      -       -      +
    678A  ASN*     1.3    60.0    +      -       -      +
    680A  LEU*     3.3    15.9    +      -       -      +
    681A  LEU*     3.0    24.3    +      -       -      +
    785B  TYR      4.6     4.5    -      -       -      +
    786B  THR*     3.9    11.8    -      -       -      +
    787B  GLY*     3.8    26.3    -      -       -      +
    790B  GLN*     4.4     7.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 678 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    562A  ASN*     5.5     5.9    +      -       -      +
    563A  LEU*     4.0    13.0    -      -       +      -
    566A  PHE*     3.2    54.1    -      -       +      -
    674A  THR*     2.7    30.4    +      -       -      +
    675A  VAL      3.9     2.5    -      -       -      +
    677A  ASN*     1.3    74.9    -      -       -      +
    679A  TRP*     1.3    67.3    +      -       -      +
    681A  LEU*     3.0    37.3    -      -       +      +
    682A  ILE*     3.5     7.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with TRP 679 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    544A  ALA      4.1     7.2    -      -       -      -
    547A  LYS*     4.5    11.7    -      -       +      -
    548A  PHE*     3.1    65.2    -      +       +      -
    553A  VAL*     4.0    18.4    -      -       +      +
    555A  LEU*     4.0    22.4    -      -       +      +
    563A  LEU*     3.8    13.1    -      -       +      +
    675A  VAL      3.1    17.7    +      -       -      +
    676A  ILE*     4.2     6.3    -      -       +      +
    678A  ASN*     1.3    75.2    -      -       -      +
    680A  LEU*     1.3    70.6    +      -       +      +
    682A  ILE*     3.0    40.4    +      -       +      +
    683A  GLU*     3.1    54.9    +      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 680 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    540A  ASP*     3.8    17.9    -      -       +      +
    544A  ALA*     3.6    30.5    -      -       +      +
    547A  LYS*     5.3     2.7    -      -       +      +
    676A  ILE      3.2    14.9    +      -       -      +
    677A  ASN*     3.3    17.5    -      -       -      +
    678A  ASN      3.2     0.4    -      -       -      -
    679A  TRP*     1.3    83.1    -      -       +      +
    681A  LEU*     1.3    56.2    -      -       -      +
    683A  GLU*     2.9    10.0    +      -       +      -
    684A  GLY*     2.7    56.2    +      -       -      +
    685A  HIS*     4.0    10.5    -      -       +      -
    784B  SER*     3.7    27.1    -      -       -      +
    785B  TYR      4.8     6.5    -      -       -      +
    787B  GLY*     6.1     0.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 681 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    562A  ASN*     6.0     4.5    -      -       -      +
    677A  ASN      3.0    13.4    +      -       -      +
    678A  ASN*     3.0    30.1    -      -       -      +
    680A  LEU*     1.3    77.0    -      -       -      +
    682A  ILE*     1.3    60.8    +      -       +      +
    684A  GLY*     5.3     0.2    -      -       -      -
    785B  TYR*     4.2    22.4    -      -       +      +
    786B  THR*     3.8    26.2    -      -       +      -
   1030B  ASN*     3.6    29.1    +      -       -      +
   1032B  PHE*     3.9    23.3    -      -       +      -
   1033B  THR*     6.1     1.8    -      -       +      -
   1037B  ILE*     3.2    18.5    -      -       -      +
     40K  HIS*     6.3     1.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 682 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    555A  LEU*     5.4     2.2    -      -       +      -
    559A  GLU*     3.9    38.1    -      -       +      +
    562A  ASN*     5.4     7.0    -      -       -      +
    678A  ASN      3.5     4.4    +      -       -      +
    679A  TRP*     3.0    49.8    +      -       +      +
    681A  LEU*     1.3    80.2    -      -       +      +
    683A  GLU*     1.3    63.3    +      -       -      +
   1030B  ASN*     4.9    11.2    -      -       -      +
   1033B  THR*     5.1     6.5    -      -       +      +
   1035B  ARG*     4.0    31.1    +      -       +      +
   1036B  LYS      3.9     4.3    -      -       -      +
   1037B  ILE*     3.8     9.2    -      -       -      +
   1038B  THR*     3.5    20.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 683 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    547A  LYS*     3.4    35.4    +      -       +      +
    553A  VAL*     5.7     0.7    -      -       -      +
    679A  TRP*     3.1    54.7    +      -       +      +
    680A  LEU*     2.9    10.5    +      -       +      +
    682A  ILE*     1.3    78.9    -      -       -      +
    684A  GLY*     1.3    59.7    +      -       -      +
   1037B  ILE*     3.3     4.0    -      -       -      +
   1038B  THR*     3.3    30.7    +      -       -      +
   1039B  SER*     3.1    30.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 684 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    547A  LYS*     2.7    26.2    +      -       -      -
    680A  LEU*     2.7    24.9    +      -       -      +
    681A  LEU      4.6     0.4    +      -       -      -
    682A  ILE      3.7     1.0    -      -       -      -
    683A  GLU*     1.3    75.5    -      -       -      +
    685A  HIS*     1.3    62.0    +      -       -      +
    783B  ALA*     6.3     0.4    -      -       -      -
    784B  SER*     5.5     2.0    -      -       -      -
    785B  TYR      6.0     1.8    -      -       -      -
   1037B  ILE*     3.5    18.8    -      -       -      +
   1039B  SER*     4.2     5.4    -      -       -      -
   1041B  ILE*     5.1     1.8    -      -       -      -
----------------------------------------------------------
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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