Contacts of the helix formed by residues 705 - 730 (chain A) in PDB entry 3BRV


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

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

Legend:
Dist - nearest distance (Å) between atoms of two residues
Surf - contact surface area (Å2) between two residues
HB   - hydrophilic-hydrophilic contact (hydrogen bond)
Arom - aromatic-aromatic contact
Phob - hydrophobic-hydrophobic contact
DC   - hydrophobic-hydrophilic contact (destabilizing contact)
+/-  - indicates presence/absence of a specific contacts
*    - indicates residues forming contacts  by their side chain
       (including CA atoms)
Residues in contact with SER 705 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    706A  GLU*     1.3    65.0    +      -       -      +
    707A  GLU*     3.6    12.8    +      -       -      +
    708A  LEU*     3.4    28.0    +      -       -      +
    709A  VAL*     3.2    26.4    +      -       -      +
     57B  GLU*     3.0    30.9    +      -       -      +
     61B  LEU*     3.6    21.4    -      -       -      +
     62D  ARG*     4.1    14.1    -      -       -      +
     66D  ARG*     6.2     0.2    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 706 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    705A  SER*     1.3    73.5    +      -       -      +
    707A  GLU*     1.3    57.5    +      -       +      +
    709A  VAL*     3.5     9.4    +      -       -      +
    710A  ALA*     3.0    28.7    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 707 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    705A  SER*     3.3     6.8    +      -       -      +
    706A  GLU*     1.3    75.2    -      -       +      +
    708A  LEU*     1.3    67.2    +      -       -      +
    709A  VAL      3.1     1.6    -      -       -      -
    710A  ALA*     3.7     7.1    -      -       +      +
    711A  GLU*     2.8    25.9    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 708 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    705A  SER*     3.4    20.5    +      -       -      +
    707A  GLU*     1.3    79.7    -      -       -      +
    709A  VAL*     1.3    57.8    +      -       +      +
    711A  GLU*     3.6     9.3    +      -       -      +
    712A  ALA      3.1    11.6    +      -       -      -
     61B  LEU*     5.5     1.6    -      -       +      -
     62D  ARG*     3.4    48.9    -      -       +      +
     65D  ILE*     3.4    16.8    -      -       +      +
     66D  ARG*     3.7    50.5    -      -       +      +
     69D  ASN*     3.1    26.3    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 709 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    705A  SER      3.2    13.9    +      -       -      +
    706A  GLU*     3.6    12.6    -      -       -      +
    707A  GLU      3.1     0.6    -      -       -      -
    708A  LEU*     1.3    79.6    -      -       +      +
    710A  ALA*     1.3    63.7    +      -       -      +
    712A  ALA*     3.4     6.9    +      -       -      +
    713A  HIS*     3.2    22.0    +      -       -      +
     60B  GLU*     4.5    11.4    -      -       +      +
     61B  LEU*     4.3    18.4    -      -       +      -
     64B  ALA*     3.7    30.7    -      -       +      +
     65D  ILE*     4.6     3.8    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 710 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    706A  GLU      3.0    18.2    +      -       -      +
    707A  GLU*     3.3     9.8    +      -       +      +
    709A  VAL*     1.3    73.6    -      -       -      +
    711A  GLU*     1.3    66.3    +      -       -      +
    713A  HIS*     3.4     8.3    +      -       -      +
    714A  ASN*     3.0    28.9    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 711 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    707A  GLU      2.8    16.2    +      -       -      +
    708A  LEU*     3.7    15.1    -      -       -      +
    710A  ALA*     1.3    77.1    -      -       -      +
    712A  ALA*     1.3    58.8    +      -       -      +
    714A  ASN*     3.2     8.5    +      -       +      +
    715A  LEU*     2.9    40.9    +      -       +      +
     69D  ASN*     3.1    24.4    -      -       -      +
     73D  ARG*     3.1    28.6    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 712 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    708A  LEU      3.1    12.5    +      -       -      +
    709A  VAL*     3.4     6.7    +      -       -      +
    710A  ALA      3.2     0.6    -      -       -      -
    711A  GLU*     1.3    78.9    -      -       -      +
    713A  HIS*     1.3    56.1    +      -       -      +
    715A  LEU*     3.2     3.2    +      -       -      +
    716A  CYS*     2.9    40.3    +      -       -      -
     64B  ALA*     5.7     5.8    -      -       +      -
     68B  SER*     5.6     6.7    -      -       -      -
     65D  ILE*     4.0    11.0    -      -       +      -
     69D  ASN*     3.1    27.1    -      -       -      +
     72D  LEU*     4.4     0.8    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with HIS 713 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    709A  VAL      3.2    11.0    +      -       -      +
    710A  ALA*     3.6    10.1    -      -       -      +
    712A  ALA*     1.3    78.3    -      -       -      +
    714A  ASN*     1.3    72.4    +      -       -      +
    716A  CYS*     3.5     6.9    +      -       -      +
    717A  THR*     2.9    43.4    +      -       -      -
     67B  GLN*     5.5     5.2    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ASN 714 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    710A  ALA*     3.0    17.9    +      -       -      +
    711A  GLU*     3.2    12.7    +      -       +      +
    713A  HIS*     1.3    90.6    -      -       -      +
    715A  LEU*     1.3    56.8    +      -       +      +
    717A  THR*     3.4     7.4    +      -       -      -
    718A  LEU*     3.2    34.2    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 715 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    711A  GLU*     2.9    27.6    +      -       +      +
    712A  ALA      3.8     3.6    -      -       -      +
    714A  ASN*     1.3    71.0    -      -       +      +
    716A  CYS*     1.3    55.5    +      -       -      +
    718A  LEU*     3.5    19.8    +      -       +      +
    719A  LEU*     2.7    34.5    +      -       -      +
     69D  ASN*     3.3    44.6    -      -       +      +
     72D  LEU*     3.8    19.2    -      -       +      +
     73D  ARG*     3.9    45.3    -      -       +      +
     76D  CYS*     4.0     6.0    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with CYS 716 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    712A  ALA*     2.9    22.4    +      -       -      +
    713A  HIS*     3.8     8.5    -      -       -      +
    715A  LEU*     1.3    73.8    -      -       -      +
    717A  THR*     1.3    61.3    +      -       -      +
    719A  LEU*     3.9     6.8    -      -       -      +
    720A  GLU*     2.8    35.3    +      -       -      +
     68B  SER*     3.8    29.2    -      -       -      -
     71B  ILE*     3.5    37.0    -      -       +      +
     72B  LEU*     6.3     0.4    -      -       -      -
     72D  LEU*     3.9    16.4    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with THR 717 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    713A  HIS*     2.9    35.7    +      -       -      -
    714A  ASN*     3.6     7.9    +      -       -      -
    715A  LEU      3.3     0.2    -      -       -      -
    716A  CYS*     1.3    75.4    -      -       -      +
    718A  LEU*     1.4    53.7    -      -       +      +
    720A  GLU*     3.1    14.2    +      -       +      +
    721A  ASN*     2.8    52.9    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 718 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    714A  ASN*     3.2    17.2    +      -       +      +
    715A  LEU*     3.7    22.0    -      -       +      +
    717A  THR*     1.4    73.8    -      -       +      +
    719A  LEU*     1.3    65.4    +      -       -      +
    721A  ASN*     3.2    13.7    +      -       +      +
    722A  ALA*     2.9    26.2    +      -       -      +
     76D  CYS*     3.9    13.7    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 719 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    715A  LEU      2.7    21.5    +      -       -      +
    716A  CYS*     3.9     4.9    -      -       -      +
    718A  LEU*     1.3    70.8    -      -       -      +
    720A  GLU*     1.3    64.5    +      -       -      +
    722A  ALA*     3.8     2.3    -      -       -      +
    723A  ILE*     3.0    37.6    +      -       +      +
     71B  ILE*     4.8    10.8    -      -       +      -
     72B  LEU*     5.1     5.4    -      -       +      -
     75B  ARG*     4.0    19.7    -      -       +      -
    719C  LEU*     3.8    33.2    -      -       +      -
    723C  ILE*     5.0     0.2    -      -       +      -
     72D  LEU*     3.8    16.4    -      -       +      -
     75D  ARG*     4.3    13.2    -      -       +      -
     76D  CYS*     3.5    12.4    -      -       -      -
     79D  LEU*     3.6    27.1    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 720 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    716A  CYS      2.8    23.2    +      -       -      +
    717A  THR*     3.2    14.3    +      -       +      +
    719A  LEU*     1.3    75.1    -      -       -      +
    721A  ASN*     1.3    60.5    +      -       -      +
    723A  ILE*     3.3     3.3    +      -       -      +
    724A  GLN*     3.0    28.6    +      -       -      +
     71B  ILE*     3.9    25.8    -      -       +      +
     74B  GLU*     5.3     0.7    -      -       -      +
     75B  ARG*     2.9    49.2    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASN 721 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    717A  THR*     2.8    38.1    +      -       -      +
    718A  LEU*     3.2    15.6    +      -       +      +
    720A  GLU*     1.3    74.2    -      -       -      +
    722A  ALA*     1.3    57.8    +      -       -      +
    724A  GLN*     3.2     7.1    +      -       -      +
    725A  ASP*     2.9    42.0    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 722 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    718A  LEU      2.9    17.7    +      -       -      +
    719A  LEU*     3.8     2.5    -      -       -      +
    721A  ASN*     1.3    76.6    -      -       -      +
    723A  ILE*     1.3    63.5    +      -       -      +
    725A  ASP*     4.6     2.7    -      -       -      -
    726A  THR*     3.1    21.9    +      -       -      -
     76D  CYS*     4.8     7.6    -      -       +      +
     79D  LEU*     3.8    30.3    -      -       +      -
     80D  LEU*     4.8    11.2    -      -       +      -
     83D  GLN*     3.2    16.7    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 723 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    719A  LEU*     3.0    28.5    +      -       +      +
    720A  GLU      3.8     3.6    -      -       -      +
    722A  ALA*     1.3    76.3    -      -       -      +
    724A  GLN*     1.3    57.3    +      -       -      +
    726A  THR*     3.4     6.3    +      -       -      -
    727A  VAL*     3.0    31.3    +      -       +      +
     75B  ARG*     3.9    25.8    -      -       +      +
     78B  GLU*     3.8    38.4    -      -       +      +
     79B  LEU*     3.7    41.1    -      -       +      -
    719C  LEU*     4.8     0.7    -      -       +      -
     79D  LEU*     3.8    21.1    -      -       +      -
----------------------------------------------------------
 Back to top of page

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      3.0    17.2    +      -       -      +
    721A  ASN*     3.2     8.9    +      -       -      +
    723A  ILE*     1.3    76.0    -      -       -      +
    725A  ASP*     1.3    64.5    +      -       -      +
    727A  VAL*     3.3    25.9    -      -       -      +
    728A  ARG*     3.4     6.8    -      -       -      +
     78B  GLU*     5.4     3.6    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ASP 725 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    721A  ASN*     2.9    24.3    +      -       -      +
    722A  ALA*     3.6     7.1    -      -       -      +
    724A  GLN*     1.3    75.5    -      -       -      +
    726A  THR*     1.3    63.8    +      -       -      +
    728A  ARG*     3.3     5.8    +      -       -      +
    729A  GLU*     3.0    25.5    +      -       -      +
     83D  GLN*     3.9    18.4    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with THR 726 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    722A  ALA      3.1    12.8    +      -       -      -
    723A  ILE*     3.5    11.3    -      -       -      -
    724A  GLN      3.3     0.6    -      -       -      -
    725A  ASP*     1.3    78.4    -      -       -      +
    727A  VAL*     1.3    59.4    +      -       +      +
    728A  ARG      3.0     6.6    +      -       -      -
    729A  GLU*     3.5     2.7    +      -       -      +
    730A  GLN*     3.1    19.8    +      -       -      +
     79B  LEU*     5.7     5.2    -      -       +      -
     82B  PHE*     3.7    17.7    -      -       +      -
     79D  LEU*     4.4    10.8    +      -       +      +
     82D  PHE*     3.7    33.0    -      -       +      -
     83D  GLN*     3.2    23.5    +      -       +      +
     86D  GLN*     3.6     8.9    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 727 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    723A  ILE*     3.0    31.0    +      -       +      +
    724A  GLN*     3.3     6.0    -      -       -      +
    726A  THR*     1.3    72.6    -      -       +      +
    728A  ARG*     1.3    58.9    +      -       -      +
    730A  GLN*     4.6     3.4    -      -       -      +
    731A  ASP*     3.9    19.6    -      -       -      +
     78B  GLU*     3.7    29.6    -      -       +      +
     79B  LEU*     5.9     0.9    -      -       +      -
     82B  PHE*     4.1    31.4    -      -       +      -
     85B  SER*     6.1     0.4    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 728 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    724A  GLN      3.4    13.7    -      -       -      +
    725A  ASP*     3.5     7.2    -      -       -      +
    726A  THR      3.0     1.6    +      -       -      -
    727A  VAL*     1.3    77.3    -      -       -      +
    729A  GLU*     1.3    69.7    +      -       -      +
    730A  GLN      3.3     1.4    -      -       -      +
    731A  ASP*     3.2    22.2    +      -       -      +
    732A  GLN*     3.4    14.8    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 729 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    725A  ASP      3.0    17.0    +      -       -      +
    726A  THR*     3.8     5.4    -      -       -      +
    728A  ARG*     1.3    76.7    -      -       -      +
    730A  GLN*     1.3    56.5    +      -       -      +
    732A  GLN*     2.9    19.5    +      -       -      +
     83D  GLN*     6.1     2.7    -      -       +      -
     86D  GLN*     4.3    10.5    -      -       +      +
     90D  LYS*     2.8    23.1    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 730 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    726A  THR      3.1     7.4    +      -       -      +
    727A  VAL*     5.1     2.0    -      -       -      +
    729A  GLU*     1.3    74.4    -      -       -      +
    731A  ASP*     1.3    70.0    +      -       -      +
    732A  GLN      3.3     7.9    +      -       -      +
    733A  SER*     4.6     6.1    +      -       -      -
     82B  PHE*     3.5    29.0    -      -       +      -
     85B  SER*     2.5    48.8    +      -       -      +
     86B  GLN*     3.3    13.1    -      -       +      -
     89B  GLU*     3.7    19.4    -      -       +      +
     86D  GLN*     3.0    33.2    -      -       -      +
     90D  LYS*     4.1     5.2    +      -       -      +
----------------------------------------------------------
 Back to top of page


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