Contacts of the helix formed by residues 712 - 737 (chain A) in PDB entry 1IVS


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 712 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    608A  ARG*     4.1    24.1    +      -       -      +
    612A  SER*     2.7    21.0    +      -       -      -
    616A  ARG*     5.3     0.7    -      -       -      -
    711A  ARG*     1.3    71.9    -      -       -      +
    713A  GLU*     1.3    70.2    +      -       -      +
    714A  GLU*     3.3    26.0    -      -       -      +
    715A  ALA*     3.3    25.1    -      -       +      +
    716A  GLU*     3.1    21.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 713 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    616A  ARG*     4.2    16.3    +      -       -      +
    711A  ARG*     3.6     9.4    +      -       +      +
    712A  ASP*     1.3    76.7    +      -       -      +
    714A  GLU*     1.3    70.5    +      -       -      +
    716A  GLU*     3.2     9.9    +      -       -      +
    717A  ARG*     3.2    42.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 714 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    712A  ASP*     3.3    17.8    -      -       -      +
    713A  GLU*     1.3    74.5    -      -       -      +
    715A  ALA*     1.3    65.8    -      -       +      +
    717A  ARG*     2.5    50.2    +      -       -      +
    718A  ALA*     2.8    13.6    +      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 715 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    605A  LEU*     4.3     8.5    -      -       +      +
    608A  ARG*     4.4    22.7    -      -       +      +
    609A  PHE*     4.7     3.1    -      -       -      +
    712A  ASP*     3.3    33.4    -      -       +      +
    713A  GLU      3.4     0.4    -      -       -      -
    714A  GLU*     1.3    81.6    -      -       +      +
    716A  GLU*     1.3    57.5    +      -       -      +
    718A  ALA*     3.0     9.0    +      -       -      +
    719A  PHE*     2.8    32.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 716 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    609A  PHE*     3.9    22.6    -      -       +      -
    612A  SER*     2.6    37.9    +      -       -      +
    613A  ARG*     3.6    18.3    +      -       -      +
    616A  ARG*     3.1    31.0    +      -       -      -
    712A  ASP      3.1    17.6    +      -       -      +
    713A  GLU*     3.6     4.9    -      -       -      +
    714A  GLU      2.7     4.0    +      -       -      -
    715A  ALA*     1.3    76.4    -      -       -      +
    717A  ARG*     1.3    56.0    +      -       -      +
    719A  PHE*     3.7     2.1    +      -       -      +
    720A  GLU*     3.2    25.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 717 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    713A  GLU*     3.2    30.5    +      -       -      +
    714A  GLU*     2.5    41.2    +      -       -      +
    716A  GLU*     1.3    74.0    -      -       -      +
    718A  ALA*     1.3    62.7    +      -       -      +
    720A  GLU*     3.5     7.5    +      -       +      +
    721A  ALA*     3.4    16.3    +      -       -      +
    751A  GLU*     4.0    19.5    -      -       -      +
    785A  ARG*     5.9     3.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 718 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    605A  LEU*     4.0    20.4    -      -       +      -
    714A  GLU*     2.8    12.4    +      -       +      +
    715A  ALA*     3.3    13.2    -      -       -      +
    717A  ARG*     1.3    77.3    -      -       -      +
    719A  PHE*     1.3    59.1    +      -       -      +
    721A  ALA*     2.9    27.9    +      -       -      +
    722A  LEU      3.2     3.3    +      -       -      -
    751A  GLU*     4.5     5.4    -      -       -      -
    754A  PRO*     3.5    19.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 719 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    605A  LEU*     3.4    28.4    -      -       +      +
    606A  ALA*     4.0    24.7    -      -       +      -
    609A  PHE*     3.5    54.7    -      +       +      -
    648A  TRP*     4.2    21.3    -      +       +      -
    649A  TYR*     5.2     0.9    -      +       -      -
    652A  ALA*     4.2    18.2    -      -       +      -
    715A  ALA      2.8     7.6    +      -       -      +
    718A  ALA*     1.3    72.7    -      -       -      +
    720A  GLU*     1.3    60.3    +      -       -      +
    722A  LEU*     3.3    27.8    +      -       +      +
    723A  LYS*     2.9    48.3    +      -       +      +
    765A  LEU*     5.9     0.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 720 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    609A  PHE*     6.1     0.6    -      -       -      -
    716A  GLU      3.2    17.7    +      -       -      +
    717A  ARG*     3.7     9.9    -      -       -      +
    718A  ALA      3.1     1.0    -      -       -      -
    719A  PHE*     1.3    74.2    -      -       -      +
    721A  ALA*     1.3    69.6    +      -       -      +
    723A  LYS*     3.0    31.6    +      -       -      +
    724A  GLN*     2.9    51.5    +      -       -      +
    785A  ARG*     5.8     4.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 721 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    717A  ARG      3.4     3.6    +      -       -      +
    718A  ALA      2.9    15.2    +      -       -      +
    720A  GLU*     1.3    80.6    -      -       -      +
    722A  LEU*     1.3    60.7    +      -       -      +
    724A  GLN*     3.1     8.7    +      -       -      +
    725A  ALA*     3.0    20.4    +      -       -      +
    751A  GLU*     3.9    35.7    -      -       +      +
    754A  PRO*     3.6    18.8    -      -       +      -
    755A  VAL*     5.5     0.7    -      -       -      -
    785A  ARG*     4.8    10.5    -      -       +      +
    786A  VAL*     4.3     4.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 722 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    605A  LEU*     5.3     4.3    -      -       +      -
    648A  TRP*     6.0     0.9    -      -       +      -
    718A  ALA      3.2     2.9    +      -       -      +
    719A  PHE*     3.4    40.6    -      -       +      +
    721A  ALA*     1.3    76.1    -      -       -      +
    723A  LYS*     1.3    69.4    +      -       -      +
    725A  ALA*     2.8    16.2    +      -       -      +
    726A  VAL*     2.9    26.4    +      -       +      +
    754A  PRO*     4.2    10.4    -      -       +      +
    755A  VAL*     3.9    34.5    -      -       +      +
    758A  ASN*     4.8    12.6    -      -       +      +
    761A  VAL*     4.3    21.5    -      -       +      -
    762A  PHE*     4.4    16.2    -      -       +      +
    765A  LEU*     5.4     2.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 723 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    609A  PHE*     4.2     7.0    -      -       -      -
    644A  GLU*     3.0    31.5    +      -       -      -
    648A  TRP*     3.5    63.8    -      -       +      +
    719A  PHE*     2.9    35.4    +      -       +      +
    720A  GLU*     3.0    31.7    +      -       -      +
    722A  LEU*     1.3    72.2    -      -       -      +
    724A  GLN*     1.3    52.1    +      -       +      +
    726A  VAL*     3.4     2.3    +      -       -      +
    727A  THR*     2.5    39.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 724 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    720A  GLU*     2.9    45.4    +      -       -      +
    721A  ALA      3.3     6.5    -      -       -      +
    722A  LEU      2.8     0.6    +      -       -      -
    723A  LYS*     1.3    73.9    -      -       +      +
    725A  ALA*     1.3    56.3    +      -       -      +
    727A  THR*     3.0     7.2    +      -       -      +
    728A  ALA*     2.6    37.2    +      -       -      +
    783A  MET*     3.8    14.0    -      -       +      +
    784A  PRO*     3.6    25.3    -      -       -      +
    785A  ARG*     3.0    46.0    +      -       -      +
    786A  VAL*     3.8     9.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 725 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    721A  ALA      3.0     9.4    +      -       -      +
    722A  LEU      2.8    11.3    +      -       -      +
    724A  GLN*     1.3    73.0    -      -       -      +
    726A  VAL*     1.3    63.6    +      -       -      +
    728A  ALA*     3.3     4.4    -      -       -      +
    729A  VAL*     3.0    28.2    +      -       -      +
    748A  LEU*     4.2    17.2    -      -       +      +
    751A  GLU      6.1     0.2    -      -       -      +
    755A  VAL*     3.6    30.3    -      -       +      -
    762A  PHE*     4.1     7.4    -      -       +      -
    786A  VAL*     3.7    16.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 726 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    648A  TRP*     3.9    11.4    -      -       +      -
    722A  LEU*     2.9    24.5    +      -       +      +
    723A  LYS      3.5     7.6    -      -       -      +
    725A  ALA*     1.3    77.5    -      -       -      +
    727A  THR*     1.3    60.6    +      -       -      +
    729A  VAL*     3.4     2.8    +      -       -      +
    730A  ARG*     3.0    62.3    +      -       -      +
    762A  PHE*     3.9    26.2    -      -       +      +
    765A  LEU*     3.9    33.9    -      -       +      -
    766A  SER*     4.5     2.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with THR 727 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    648A  TRP*     4.1    20.6    -      -       +      -
    723A  LYS      2.5    27.5    +      -       -      +
    724A  GLN*     3.0    15.9    +      -       -      +
    726A  VAL*     1.3    70.6    -      -       -      +
    728A  ALA*     1.3    67.0    +      -       -      +
    730A  ARG*     3.3    11.2    -      -       -      +
    731A  ALA*     2.8    26.7    +      -       -      +
    783A  MET*     4.5    10.1    -      -       -      +
    941C    A      3.3    26.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 728 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    724A  GLN      2.6    23.1    +      -       -      +
    725A  ALA*     3.3     8.5    -      -       -      +
    727A  THR*     1.3    72.5    +      -       -      +
    729A  VAL*     1.3    65.1    +      -       -      +
    731A  ALA*     2.9     6.0    +      -       -      +
    732A  LEU*     2.9    22.8    +      -       -      +
    781A  LYS*     3.8    18.8    -      -       +      +
    783A  MET*     3.8    25.3    -      -       +      -
    786A  VAL*     5.2     2.2    -      -       +      -
    788A  ALA*     4.1    17.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 729 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    725A  ALA      3.0    15.3    +      -       -      +
    726A  VAL      3.7     4.0    -      -       -      +
    728A  ALA*     1.3    79.2    -      -       -      +
    730A  ARG*     1.3    57.7    +      -       -      +
    732A  LEU*     3.0    13.3    +      -       -      +
    733A  LYS*     2.9    36.4    +      -       +      +
    744A  VAL*     5.0     1.3    -      -       +      -
    746A  VAL*     4.0    28.9    -      -       +      -
    748A  LEU*     4.9     1.1    -      -       +      -
    762A  PHE*     3.7    23.6    -      -       +      -
    766A  SER*     3.6    26.9    -      -       -      +
    768A  ALA*     3.8    13.7    -      -       +      -
    788A  ALA*     4.8     5.2    -      -       +      -
    790A  MET*     5.2     0.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 730 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    647A  ASP      5.8     1.6    +      -       -      -
    648A  TRP*     4.1    17.2    -      -       -      -
    726A  VAL*     3.0    34.8    +      -       -      +
    727A  THR*     3.3    18.4    -      -       -      +
    729A  VAL*     1.3    78.8    -      -       -      +
    731A  ALA*     1.3    58.4    +      -       -      +
    733A  LYS*     4.1    11.7    -      -       +      +
    734A  ALA*     3.4    19.9    +      -       -      +
    765A  LEU*     2.6    44.1    +      -       -      +
    766A  SER*     5.3     6.3    -      -       -      +
    940C    G      3.4    56.9    +      -       -      +
    941C    A      4.0    12.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 731 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    727A  THR      2.8    17.7    +      -       -      +
    728A  ALA*     3.3     4.9    -      -       -      +
    730A  ARG*     1.3    76.0    -      -       -      +
    732A  LEU*     1.3    69.5    +      -       -      +
    734A  ALA*     3.4     1.6    +      -       -      +
    735A  GLU*     3.1    29.7    +      -       -      +
    781A  LYS*     3.8    23.6    -      -       -      +
    783A  MET*     5.8     2.2    -      -       +      -
    941C    A      3.8    26.7    -      -       -      +
    942C    G      4.3     2.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 732 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    728A  ALA      2.9     7.9    +      -       -      +
    729A  VAL*     3.3     9.6    -      -       -      +
    731A  ALA*     1.3    73.5    -      -       -      +
    733A  LYS*     1.3    67.3    -      -       -      +
    735A  GLU*     3.0     8.0    +      -       -      +
    736A  ALA*     2.8    24.3    +      -       -      +
    746A  VAL*     4.8     4.3    -      -       +      -
    779A  LEU*     4.2    10.0    -      -       +      +
    780A  VAL      4.0    12.3    -      -       -      +
    781A  LYS*     3.4    40.8    -      -       +      -
    788A  ALA*     4.1    22.9    -      -       +      +
    790A  MET*     3.9    38.4    -      -       +      +
    801A  TRP*     4.0    16.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 733 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    729A  VAL*     2.9    22.7    +      -       +      +
    730A  ARG*     4.2     7.9    -      -       -      +
    732A  LEU*     1.3    75.5    -      -       -      +
    734A  ALA*     1.3    67.5    +      -       -      +
    736A  ALA*     3.1     4.2    +      -       -      -
    737A  GLY      3.0    14.7    +      -       -      -
    738A  LEU*     3.1    31.0    +      -       +      +
    739A  PRO      4.3     6.7    -      -       -      +
    740A  PRO*     3.4    17.0    +      -       +      +
    742A  GLN      2.7    23.7    +      -       -      +
    744A  VAL*     3.6    27.8    -      -       +      -
    766A  SER      2.9    12.1    +      -       -      +
    767A  ARG*     2.9    34.8    +      -       -      +
    790A  MET*     4.2    12.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 734 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    730A  ARG      3.4    14.8    +      -       -      +
    731A  ALA      3.4    10.3    -      -       -      +
    732A  LEU      3.1     0.6    -      -       -      -
    733A  LYS*     1.3    76.8    -      -       -      +
    735A  GLU*     1.3    59.1    +      -       -      +
    737A  GLY*     2.9    22.7    +      -       -      -
    738A  LEU      5.0     2.9    -      -       -      -
    804A  ARG*     5.6     0.7    -      -       -      +
    940C    G      5.3     6.3    -      -       -      +
    941C    A      3.8    31.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 735 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    731A  ALA      3.2    13.9    -      -       -      +
    732A  LEU*     3.0    10.9    +      -       -      +
    734A  ALA*     1.3    80.4    -      -       +      +
    736A  ALA*     1.3    63.1    +      -       -      +
    737A  GLY*     3.0     1.6    +      -       -      -
    781A  LYS*     3.0    24.9    +      -       -      -
    797A  ASP*     3.4     6.6    -      -       -      +
    800A  GLU*     3.1    30.3    -      -       -      +
    801A  TRP*     3.8    24.7    -      -       +      +
    804A  ARG*     3.2    48.8    +      -       +      +
    805A  GLN*     3.3    19.6    +      -       -      +
    941C    A      5.0     0.2    -      -       -      +
    942C    G      4.0     7.1    +      -       -      -
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Residues in contact with ALA 736 (chain A). Click here for Legend to table.
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                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
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    732A  LEU      2.8    19.5    +      -       -      +
    733A  LYS*     3.1     5.4    +      -       -      +
    735A  GLU*     1.3    72.0    -      -       -      +
    737A  GLY*     1.3    60.6    +      -       -      +
    738A  LEU*     3.5    25.2    +      -       +      +
    779A  LEU*     4.2    18.1    -      -       +      +
    790A  MET*     4.9     1.8    -      -       -      -
    795A  LEU      4.3     1.6    -      -       -      +
    796A  LEU*     3.6    16.7    -      -       +      -
    797A  ASP*     2.7    34.2    +      -       -      +
    801A  TRP*     5.3     0.8    -      -       -      +
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Residues in contact with GLY 737 (chain A). Click here for Legend to table.
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                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
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    734A  ALA      2.9    16.2    +      -       -      -
    735A  GLU      3.0     2.5    -      -       -      -
    736A  ALA*     1.3    79.5    -      -       -      +
    738A  LEU*     1.3    65.1    +      -       -      +
    739A  PRO*     3.7     6.1    -      -       -      +
    795A  LEU      5.8     0.2    -      -       -      -
    797A  ASP*     4.5     6.1    -      -       -      -
    929C    G      5.4     1.9    +      -       -      -
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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
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  Atomic class           I  II  III   IV   V   VI  VII  VIII
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   I  (Hydrophilic)      +   +    +    -   +   +    +    +
  II  (Acceptor)         +   -    +    -   +   +    +    -
 III  (Donor)            +   +    -    -   +   +    -    +
  IV  (Hydrophobic)      -   -    -    +   +   +    +    +
   V  (Aromatic)         +   +    +    +   +   +    +    +
  VI  (Neutral)          +   +    +    +   +   +    +    +
 VII  (Neutral-donor)    +   +    -    +   +   +    -    +
VIII  (Neutral-acceptor) +   -    +    +   +   +    +    -
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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