Purification and HDL-like particle formation of apolipoprotein A-I after co-expression with the EDDIE mutant of Npro autoprotease
(2021) In Protein Expression and Purification 187.- Abstract
- Apolipoprotein A-I (ApoA-I) is the major protein constituent of high-density lipoprotein particles, and as such is involved in cholesterol transport and activation of LCAT (the lecithin:cholesterol acyltransferase). It may also form amyloidal deposits in the body, showing the multifaceted interactions of ApoA-I. In order to facilitate the study of ApoA-I in various systems, we have developed a protocol based on recombinant expression in E. coli. ApoA-I is protected from degradation by driving its expression to inclusion bodies using a tag: the EDDIE mutant of Npro autoprotease from classical swine fever virus. Upon refolding, EDDIE will cleave itself off from the target protein. The result is a tag-free ApoA-I, with its N-terminus... (More)
- Apolipoprotein A-I (ApoA-I) is the major protein constituent of high-density lipoprotein particles, and as such is involved in cholesterol transport and activation of LCAT (the lecithin:cholesterol acyltransferase). It may also form amyloidal deposits in the body, showing the multifaceted interactions of ApoA-I. In order to facilitate the study of ApoA-I in various systems, we have developed a protocol based on recombinant expression in E. coli. ApoA-I is protected from degradation by driving its expression to inclusion bodies using a tag: the EDDIE mutant of Npro autoprotease from classical swine fever virus. Upon refolding, EDDIE will cleave itself off from the target protein. The result is a tag-free ApoA-I, with its N-terminus intact. ApoA-I was then purified using a five-step procedure composed of anion exchange chromatography, immobilized metal ion affinity chromatography, hydrophobic interaction chromatography, boiling and size exclusion chromatography. This led to protein of high purity as confirmed with SDS-PAGE and mass spectrometry. The purified ApoA-I formed discoidal objects in the presence of zwitterionic phospholipid DMPC, showing its retained function of interacting with lipids. The protocol was also tested by expression and purification of two ApoA-I mutants, both of which could be purified in the same manner as the wildtype, showing the robustness of the protocol. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/7e4d70c4-8075-49b6-be75-be35cfbaf808
- author
- Frankel, Rebecca LU ; Bernfur, Katja LU ; Sparr, Emma LU and Linse, Sara LU
- organization
- publishing date
- 2021
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Apolipoprotein A-I, Autoprotease, Expression, Purification, High-density lipoprotein
- in
- Protein Expression and Purification
- volume
- 187
- article number
- 105946
- pages
- 10 pages
- publisher
- Academic Press
- external identifiers
-
- scopus:85111208778
- pmid:34298139
- ISSN
- 1046-5928
- DOI
- 10.1016/j.pep.2021.105946
- language
- English
- LU publication?
- yes
- id
- 7e4d70c4-8075-49b6-be75-be35cfbaf808
- date added to LUP
- 2021-10-11 09:43:06
- date last changed
- 2023-11-08 20:49:08
@article{7e4d70c4-8075-49b6-be75-be35cfbaf808, abstract = {{Apolipoprotein A-I (ApoA-I) is the major protein constituent of high-density lipoprotein particles, and as such is involved in cholesterol transport and activation of LCAT (the lecithin:cholesterol acyltransferase). It may also form amyloidal deposits in the body, showing the multifaceted interactions of ApoA-I. In order to facilitate the study of ApoA-I in various systems, we have developed a protocol based on recombinant expression in <i>E. coli</i>. ApoA-I is protected from degradation by driving its expression to inclusion bodies using a tag: the EDDIE mutant of Npro autoprotease from classical swine fever virus. Upon refolding, EDDIE will cleave itself off from the target protein. The result is a tag-free ApoA-I, with its N-terminus intact. ApoA-I was then purified using a five-step procedure composed of anion exchange chromatography, immobilized metal ion affinity chromatography, hydrophobic interaction chromatography, boiling and size exclusion chromatography. This led to protein of high purity as confirmed with SDS-PAGE and mass spectrometry. The purified ApoA-I formed discoidal objects in the presence of zwitterionic phospholipid DMPC, showing its retained function of interacting with lipids. The protocol was also tested by expression and purification of two ApoA-I mutants, both of which could be purified in the same manner as the wildtype, showing the robustness of the protocol.}}, author = {{Frankel, Rebecca and Bernfur, Katja and Sparr, Emma and Linse, Sara}}, issn = {{1046-5928}}, keywords = {{Apolipoprotein A-I; Autoprotease; Expression; Purification; High-density lipoprotein}}, language = {{eng}}, publisher = {{Academic Press}}, series = {{Protein Expression and Purification}}, title = {{Purification and HDL-like particle formation of apolipoprotein A-I after co-expression with the EDDIE mutant of Npro autoprotease}}, url = {{http://dx.doi.org/10.1016/j.pep.2021.105946}}, doi = {{10.1016/j.pep.2021.105946}}, volume = {{187}}, year = {{2021}}, }