Contacts of the helix formed by residues 5045 - 5073 (chain c) in PDB entry 2AXT
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.
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 LEU5045 (chain c).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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5027c ASP* 4.4 5.2 - - - +
5041c ARG 3.4 23.8 - - - +
5042c LEU* 3.4 13.8 + - + +
5043c ILE 3.8 0.4 - - - -
5044c ASN* 1.3 90.3 - - - +
5046c SER* 1.3 68.6 + - - +
5047c GLY 3.1 2.7 - - - -
5048c LYS* 2.8 22.5 + - + -
5049c LEU* 2.9 10.4 + - - -
5138c GLU* 3.2 44.9 - - - +
5139c THR* 4.6 6.3 - - - +
5501c CLA 3.5 24.0 - - - -
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Residues in contact with SER5046 (chain c).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
5045c LEU* 1.3 74.3 - - - +
5047c GLY* 1.3 55.0 + - - +
5049c LEU* 3.2 12.9 - - - +
5050c LEU* 2.6 37.6 + - - +
5139c THR* 4.0 2.5 + - - +
5140c LEU* 3.1 30.7 + - - +
5141c GLU 4.7 0.5 + - - -
5148c GLY* 4.9 1.9 - - - -
5149c TYR* 3.4 45.8 + - - -
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Residues in contact with GLY5047 (chain c).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
5045c LEU 2.8 6.1 + - - -
5046c SER* 1.3 81.4 + - - +
5048c LYS* 1.3 58.2 + - - -
5050c LEU* 3.3 13.7 - - - +
5051c GLY 3.4 1.2 + - - -
5132c HIS* 2.9 20.6 + - - +
5137c PRO 3.4 19.7 - - - -
5139c THR 3.6 10.0 - - - +
5140c LEU* 3.8 18.2 - - - -
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Residues in contact with LYS5048 (chain c).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
5042c LEU* 3.5 25.6 - - + -
5045c LEU* 2.8 14.8 + - + +
5047c GLY* 1.3 68.0 - - - -
5049c LEU* 1.3 51.5 + - - +
5050c LEU 2.7 6.5 + - - -
5051c GLY* 2.7 23.4 + - - -
5052c ALA 2.8 14.2 + - - -
5132c HIS 2.9 26.4 + - - -
5133c ALA* 2.8 13.8 - - - +
5134c ILE* 2.8 43.9 + - - +
5136c GLY 3.3 10.3 + - - -
5137c PRO 4.0 1.1 - - - -
5138c GLU* 3.3 39.6 - - + +
5501c CLA 3.5 18.5 - - + +
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Residues in contact with LEU5049 (chain c).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
5042c LEU* 3.7 25.9 - - + +
5043c ILE 4.2 4.9 - - - +
5045c LEU 2.9 6.0 + - - +
5046c SER* 3.0 18.6 + - - +
5048c LYS* 1.3 75.5 - - - +
5050c LEU* 1.3 56.7 + - - +
5052c ALA* 4.0 9.2 - - + -
5053c HIS* 2.8 53.4 + - + +
5149c TYR* 3.1 23.3 - - + +
5151c TRP* 3.8 21.3 - - + -
5499c CLA 3.7 35.2 - - + -
5501c CLA 4.8 1.3 - - - -
5502c CLA 5.0 1.2 - - - +
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Residues in contact with LEU5050 (chain c).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
5046c SER 2.6 13.9 + - - +
5047c GLY* 3.3 11.2 - - - +
5048c LYS 2.8 0.2 - - - -
5049c LEU* 1.3 75.0 - - - +
5051c GLY* 1.3 54.0 + - - +
5053c HIS* 3.1 4.8 + - - +
5054c VAL* 2.7 48.0 + - + +
5132c HIS* 3.5 37.7 - - + +
5140c LEU* 4.7 6.5 - - + -
5149c TYR* 6.3 0.9 - - + -
5502c CLA 4.0 42.6 - - + -
5503c CLA 3.6 39.5 - - + +
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Residues in contact with GLY5051 (chain c).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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5047c GLY 3.4 4.2 + - - -
5048c LYS 2.7 12.1 + - - -
5050c LEU* 1.3 72.6 - - - +
5052c ALA* 1.3 55.3 + - - -
5054c VAL* 4.2 1.3 - - - -
5055c ALA* 2.7 37.7 + - - +
5129c GLY* 3.3 15.6 - - - -
5132c HIS* 3.6 25.3 - - - +
5133c ALA* 4.1 4.9 - - - -
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Residues in contact with ALA5052 (chain c).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
5042c LEU* 5.0 0.7 - - + -
5048c LYS 2.8 8.5 + - - +
5049c LEU* 4.0 11.9 - - + +
5051c GLY* 1.3 75.3 - - - +
5053c HIS* 1.3 64.4 + - - +
5056c HIS* 3.1 26.5 + - - +
5499c CLA 3.5 33.1 - - + +
5501c CLA 3.4 41.4 - - + +
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Residues in contact with HIS5053 (chain c).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
5049c LEU* 2.8 33.5 + - + +
5050c LEU 3.1 7.7 + - - +
5052c ALA* 1.3 81.4 - - - +
5054c VAL* 1.3 55.9 + - + +
5056c HIS* 3.9 4.3 + - - +
5057c ALA* 3.0 30.5 + - - +
5499c CLA 2.8 89.7 + + + -
5502c CLA 3.6 43.4 - - + +
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Residues in contact with VAL5054 (chain c).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
5050c LEU* 2.7 40.7 + - + +
5051c GLY* 3.8 2.5 - - - +
5053c HIS* 1.3 71.2 - - + +
5055c ALA* 1.3 67.2 + - - +
5057c ALA* 3.1 18.1 + - - +
5058c GLY* 3.2 7.8 + - - -
5125c LEU* 3.0 33.6 - - + +
5128c GLY 3.8 4.7 - - - -
5129c GLY* 3.3 14.4 - - - +
5132c HIS* 5.1 1.8 - - + -
5502c CLA 4.5 2.9 - - + +
5503c CLA 3.9 46.9 - - + -
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Residues in contact with ALA5055 (chain c).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
5051c GLY 2.7 21.8 + - - +
5054c VAL* 1.3 72.7 - - - +
5056c HIS* 1.3 57.7 + - - +
5058c GLY* 3.0 21.0 + - - -
5059c LEU 3.4 2.6 + - - -
5125c LEU 4.4 3.8 - - - -
5126c GLY* 5.0 0.7 - - - -
5129c GLY* 3.5 19.9 - - - +
5130c VAL 4.4 0.4 - - - +
5501c CLA 3.7 10.8 - - + -
5504c BCR 3.2 48.2 - - + +
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Residues in contact with HIS5056 (chain c).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
5052c ALA 3.1 17.3 + - - +
5053c HIS* 3.9 4.2 + - - +
5055c ALA* 1.3 74.3 - - - +
5057c ALA* 1.3 57.7 + - - +
5058c GLY 2.5 6.4 + - - -
5059c LEU* 2.5 41.6 + - + +
5060c ILE* 3.3 34.7 + - + +
5499c CLA 3.6 47.0 - - + +
5500c CLA 3.0 62.8 + + - -
5501c CLA 4.9 2.9 - - + -
5504c BCR 3.7 1.5 - - - +
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Residues in contact with ALA5057 (chain c).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
5053c HIS 3.0 16.6 + - - +
5054c VAL* 3.1 7.4 + - - +
5056c HIS* 1.3 82.5 + - - +
5058c GLY* 1.3 55.4 - - - +
5060c ILE* 4.3 12.1 - - + -
5061c VAL* 3.3 13.0 - - - +
5125c LEU* 3.1 18.1 - - + +
5493c CLA 4.2 8.1 - - + +
5499c CLA 6.1 4.5 - - + -
5502c CLA 3.9 34.7 - - - +
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Residues in contact with GLY5058 (chain c).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
5054c VAL 3.2 1.6 + - - -
5055c ALA 3.0 10.4 + - - -
5056c HIS 2.5 7.9 + - - -
5057c ALA* 1.3 76.1 - - - +
5059c LEU* 1.3 54.2 + - - -
5060c ILE 3.2 1.6 - - - -
5061c VAL* 3.8 2.2 - - - +
5062c PHE* 2.7 36.0 + - - +
5122c SER* 3.8 2.8 - - - -
5125c LEU* 4.0 20.6 - - - -
5504c BCR 3.6 16.8 - - - +
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Residues in contact with LEU5059 (chain c).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
5055c ALA 3.4 0.8 + - - +
5056c HIS* 2.5 20.7 + - + +
5058c GLY* 1.3 73.2 - - - +
5060c ILE* 1.3 55.7 + - - +
5062c PHE* 3.5 8.5 - - + +
5063c TRP* 2.9 29.3 + - - +
5500c CLA 3.5 44.3 - - + +
5501c CLA 3.9 12.1 - - + -
5504c BCR 3.4 34.5 - - + -
5029k PRO* 4.0 21.3 - - + -
5032k PHE* 3.4 37.2 - - + -
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Residues in contact with ILE5060 (chain c).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
5056c HIS* 3.5 37.2 - - + +
5057c ALA* 4.5 7.0 - - + +
5058c GLY 3.2 0.2 - - - -
5059c LEU* 1.3 76.0 - - - +
5061c VAL* 1.3 61.0 + - - +
5063c TRP* 3.4 2.8 + - - +
5064c ALA* 2.8 26.5 + - - +
5493c CLA 3.6 63.8 - - + +
5499c CLA 4.9 9.0 - - + -
5500c CLA 3.7 44.6 - - + -
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Residues in contact with VAL5061 (chain c).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
5057c ALA 3.3 21.5 - - - +
5058c GLY 3.4 4.9 + - - +
5060c ILE* 1.3 73.0 - - - +
5062c PHE* 1.3 70.0 + - - +
5064c ALA* 3.0 7.0 + - - +
5065c GLY* 2.7 22.7 + - - -
5118c HIS* 3.0 42.3 - - + +
5121c SER* 4.2 0.2 - - - -
5122c SER* 4.1 9.2 - - - +
5125c LEU* 3.7 12.6 - - + -
5477c UNK 3.9 14.1 - - + -
5493c CLA 3.4 28.3 - - + -
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Residues in contact with PHE5062 (chain c).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
5058c GLY 2.7 23.5 + - - +
5059c LEU* 3.5 10.5 - - + +
5061c VAL* 1.3 73.4 - - - +
5063c TRP* 1.3 51.0 + - - +
5065c GLY* 3.4 0.9 - - - -
5066c ALA* 2.6 43.8 + - + +
5119c LEU* 3.4 32.4 - - + +
5122c SER* 3.6 19.7 - - - -
5504c BCR 4.5 16.8 - - + -
5025k LEU* 3.6 21.3 - - + -
5026k PRO* 5.4 0.2 - - + -
5028k ILE* 3.4 25.1 - - + -
5029k PRO* 3.3 42.8 - - + -
5032k PHE* 5.7 1.3 - + - -
5130x BCR 4.5 16.8 - - + -
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Residues in contact with TRP5063 (chain c).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
5059c LEU 2.9 19.4 + - - +
5060c ILE 3.5 6.5 - - - +
5062c PHE* 1.3 77.2 - - - +
5064c ALA* 1.3 82.6 + - - +
5065c GLY 2.8 3.3 + - - -
5066c ALA* 3.0 3.3 + - - +
5067c MET* 2.8 60.3 + - + +
5087c ILE* 4.6 3.8 - - + -
5088c LEU* 3.6 34.1 - - + -
5492c CLA 3.7 49.4 - - + -
5493c CLA 4.3 13.7 - - + -
5494c CLA 3.1 52.3 - + + -
5500c CLA 3.8 17.9 - - + -
5026k PRO* 4.5 8.3 - - + -
5029k PRO* 4.9 2.2 - - + -
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Residues in contact with ALA5064 (chain c).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
5060c ILE 2.8 17.7 + - - +
5061c VAL* 3.4 7.6 - - - +
5063c TRP* 1.3 86.4 - - - +
5065c GLY* 1.3 60.1 + - - +
5068c THR* 2.8 29.3 + - - -
5088c LEU* 3.7 2.7 - - - +
5118c HIS* 3.5 22.2 - - + -
5493c CLA 3.6 34.4 - - + +
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Residues in contact with GLY5065 (chain c).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
5061c VAL 2.7 10.7 + - - -
5062c PHE 3.4 2.9 - - - -
5063c TRP 2.8 0.4 + - - -
5064c ALA* 1.3 75.0 - - - +
5066c ALA* 1.3 63.4 + - - -
5067c MET 3.2 2.7 + - - -
5068c THR* 3.2 10.7 + - - -
5069c LEU* 3.4 17.3 + - - +
5115c GLY 3.0 26.8 - - - +
5118c HIS* 3.6 9.6 - - - +
5119c LEU* 3.9 8.3 - - - -
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Residues in contact with ALA5066 (chain c).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
5062c PHE* 2.6 33.8 + - + +
5063c TRP* 4.0 2.7 - - - +
5065c GLY* 1.3 71.6 - - - +
5067c MET* 1.3 60.2 + - - +
5069c LEU* 3.7 6.2 + - - +
5070c PHE* 3.3 14.2 + - - +
5119c LEU* 4.1 12.4 - - + +
5022k VAL 4.6 1.4 - - - +
5025k LEU* 3.7 40.6 - - + +
5026k PRO* 3.7 14.6 - - + +
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Residues in contact with MET5067 (chain c).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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5063c TRP* 2.8 43.4 + - + +
5066c ALA* 1.3 70.3 - - - +
5068c THR* 1.3 54.0 + - - +
5069c LEU 3.1 2.0 - - - -
5070c PHE* 2.9 24.5 + - + +
5071c GLU* 2.7 44.7 + - + +
5087c ILE* 4.8 7.9 - - + -
5088c LEU* 3.4 21.1 - - + -
5494c CLA 2.6 74.0 - - + +
5026k PRO* 4.0 8.0 - - + +
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Residues in contact with THR5068 (chain c).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
5064c ALA 2.8 20.4 + - - -
5065c GLY 3.2 1.4 + - - -
5067c MET* 1.3 78.1 - - - +
5069c LEU* 1.3 56.7 + - + +
5071c GLU* 3.5 6.1 - - - +
5072c LEU* 3.0 25.5 + - - +
5088c LEU* 3.5 13.2 - - + +
5089c ILE* 4.4 8.8 - - + +
5092c ILE* 4.2 16.2 - - + -
5111c PHE* 3.8 17.3 - - + +
5115c GLY* 3.6 28.3 - - - +
5493c CLA 3.1 17.7 - - - -
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Residues in contact with LEU5069 (chain c).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
5065c GLY 3.4 12.3 + - - +
5066c ALA* 3.9 7.2 - - - +
5067c MET 3.1 0.4 - - - -
5068c THR* 1.3 75.9 - - + +
5070c PHE* 1.3 56.7 + - - +
5072c LEU* 3.8 6.6 - - + +
5073c ALA* 2.7 36.7 + - - +
5112c PHE* 3.8 49.8 - - + +
5115c GLY* 4.1 5.6 - - - -
5116c VAL* 4.1 16.8 - - + +
5119c LEU* 4.0 26.2 - - + -
5504c BCR 4.9 12.3 - - + -
5011k LEU* 4.9 5.8 - - + +
5022k VAL* 3.8 20.6 - - + +
5025k LEU* 5.5 2.7 - - + -
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Residues in contact with PHE5070 (chain c).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
5066c ALA 3.3 4.3 + - - +
5067c MET* 2.9 25.2 + - - +
5069c LEU* 1.3 78.1 - - - +
5071c GLU* 1.3 63.8 + - + +
5073c ALA* 4.4 2.7 - - - -
5074c HIS* 2.8 66.2 + + - -
5478c UNK 3.7 16.6 - - + -
5494c CLA 3.3 54.5 - + + -
5022k VAL* 4.0 5.1 - - - +
5023k ASP* 3.4 37.2 - - + -
5026k PRO* 3.6 23.6 - - + -
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Residues in contact with GLU5071 (chain c).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
5067c MET* 2.7 32.8 + - + +
5068c THR* 3.5 5.2 - - - +
5070c PHE* 1.3 79.1 - - + +
5072c LEU* 1.3 52.5 + - - +
5074c HIS* 2.6 29.7 + - - +
5075c PHE* 2.6 14.0 + - - -
5085c GLY 4.3 2.1 - - - +
5086c LEU* 3.6 20.8 - - + +
5087c ILE* 2.8 34.5 + - - +
5088c LEU* 2.9 19.4 + - - +
5089c ILE* 2.6 46.6 + - + +
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Residues in contact with LEU5072 (chain c).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
5068c THR 3.0 14.6 + - - +
5069c LEU* 3.8 7.9 - - + +
5071c GLU* 1.3 80.0 - - - +
5073c ALA* 1.3 62.8 + - - +
5074c HIS 3.0 1.2 + - - -
5075c PHE* 3.3 20.3 + - + +
5089c ILE* 3.5 6.0 - - + +
5108c THR* 2.7 27.6 - - - +
5111c PHE* 4.4 12.6 - - + -
5112c PHE* 3.6 50.5 - - + +
5010k LYS* 3.3 38.1 + - + +
5011k LEU* 4.6 6.1 - - + +
5012k PRO* 4.8 0.7 - - + -
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Residues in contact with ALA5073 (chain c).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
5069c LEU 2.7 22.8 + - - +
5070c PHE 3.8 0.7 - - - +
5071c GLU 3.0 0.2 + - - -
5072c LEU* 1.3 71.9 - - - +
5074c HIS* 1.3 76.1 + - + +
5010k LYS 4.3 7.8 + - - -
5011k LEU* 3.8 34.4 + - + +
5019k ASP* 4.6 7.6 - - - +
5022k VAL* 4.0 9.4 - - + -
5023k ASP* 4.5 4.0 - - - +
----------------------------------------------------------
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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