RRC ID 17506
著者 Santos CA, Beloti LL, Toledo MA, Crucello A, Favaro MT, Mendes JS, Santiago AS, Azzoni AR, Souza AP.
タイトル A novel protein refolding protocol for the solubilization and purification of recombinant peptidoglycan-associated lipoprotein from Xylella fastidiosa overexpressed in Escherichia coli.
ジャーナル Protein Expr Purif
Abstract Xylella fastidiosa is a Gram-negative xylem-limited plant pathogenic bacterium responsible for several economically important crop diseases. Here, we present a novel and efficient protein refolding protocol for the solubilization and purification of recombinant X. fastidiosa peptidoglycan-associated lipoprotein (XfPal). Pal is an outer membrane protein that plays important roles in maintaining the integrity of the cell envelope and in bacterial pathogenicity. Because Pal has a highly hydrophobic N-terminal domain, the heterologous expression studies necessary for structural and functional protein characterization are laborious once the recombinant protein is present in inclusion bodies. Our protocol based on the denaturation of the XfPal-enriched inclusion bodies with 8M urea followed by buffer-exchange steps via dialysis proved effective for the solubilization and subsequent purification of XfPal, allowing us to obtain a large amount of relatively pure and folded protein. In addition, XfPal was biochemically and functionally characterized. The method for purification reported herein is valuable for further research on the three-dimensional structure and function of Pal and other outer membrane proteins and can contribute to a better understanding of the role of these proteins in bacterial pathogenicity, especially with regard to the plant pathogen X. fastidiosa.
巻・号 82(2)
ページ 284-9
公開日 2012-4-1
DOI 10.1016/j.pep.2012.01.010
PII S1046-5928(12)00011-3
PMID 22306742
MeSH Amino Acid Sequence Bacterial Proteins / biosynthesis Bacterial Proteins / chemistry* Bacterial Proteins / isolation & purification Chromatography, Gel Escherichia coli* Lipoproteins / biosynthesis Lipoproteins / chemistry* Lipoproteins / isolation & purification Molecular Sequence Data Peptidoglycan / biosynthesis Peptidoglycan / chemistry* Peptidoglycan / isolation & purification Protein Binding Protein Refolding* Protein Structure, Quaternary Protein Structure, Secondary Sequence Homology, Amino Acid Solubility Xylella*
IF 1.513
引用数 10
WOS 分野 BIOTECHNOLOGY & APPLIED MICROBIOLOGY BIOCHEMICAL RESEARCH METHODS BIOCHEMISTRY & MOLECULAR BIOLOGY
リソース情報
原核生物(大腸菌) JW0731-KC