title: Single protein production (SPP) system in Escherichia coli.
abstract: Here, we provide a detailed protocol for the single protein production (SPP) system, which is designed to produce only a single protein of interest in living Escherichia coli cells. Induction of MazF, an mRNA interferase that cleaves RNA at ACA nucleotide sequences, results in complete cell growth arrest. However, if mRNA encoding a protein of interest is engineered to be devoid of ACA base triplets and is induced at 15 degrees C using pCold vectors in MazF-expressing cells, only the protein from this mRNA is produced at a yield of 20-30% of total cellular protein; other cellular protein synthesis is almost completely absent. In theory, any protein can be produced by the SPP system. Protein yields are typically unaffected even if the culture is condensed up to 40-fold, reducing the cost of protein production by up to 97.5%. The SPP system has a number of key features important for protein production, including high-yield and prolonged production of isotope-labeled protein at a very high signal-to-noise ratio. The procedure can be completed in 7 d after cloning of an ACA-less target gene into the expression system.
authors.affiliation: Department of Biochemistry, Robert Wood Johnson Medical School, Piscataway, New Jersey 08854, USA.
authors.forename: Motoo
authors.initials: M
authors.lastname: Suzuki
authors.forename: Lili
authors.initials: L
authors.lastname: Mao
authors.forename: Masayori
authors.initials: M
authors.lastname: Inouye
mesh_terms: D000595:Amino Acid Sequence; D001483:Base Sequence; D004269:DNA, Bacterial / Q000737:chemistry / Q000235:genetics / Q000302:isolation & purification; D004926:Escherichia coli / Q000378:metabolism*; D029968:Escherichia coli Proteins / Q000737:chemistry / Q000235:genetics* / Q000302:isolation & purification; D005798:Genes, Bacterial
chemical_list: D004269:DNA, Bacterial; D029968:Escherichia coli Proteins