title: Overproduction and purification of the CcpA protein from Lactococcus lactis.
abstract: In this work we present cloning and overexpression of lactococcal CcpA protein in Escherichia coli Xl1blue strain as a fusion with 6 x His tag. A high yield of the CcpA protein was obtained when the cells were cultured in liquid medium LB with 100 microg/ml ampicillin at 37 degrees C and subsequently for 4 h after induction by IPTG. The procedure let us obtain 5 mg of homogenous CcpA protein. Glutaraldehyde crosslinking analysis indicated the formation of dimer or tetramer forms of the CcpA protein.
authors.affiliation: Department of Microbial Biochemistry, Institute of Biochemistry and Biophysics, Polish Academy of Sciences, A. Pawińskiego 5a, 02-106 Warsaw, Poland.
authors.forename: Magdalena
authors.initials: M
authors.lastname: Kowalczyk
authors.forename: Jacek
authors.initials: J
authors.lastname: Bardowski
mesh_terms: D001426:Bacterial Proteins; D003001:Cloning, Molecular; D003432:Cross-Linking Reagents / Q000737:chemistry; D004268:DNA-Binding Proteins / Q000096:biosynthesis* / Q000737:chemistry / Q000235:genetics / Q000302:isolation & purification*; D004591:Electrophoresis, Polyacrylamide Gel; D004926:Escherichia coli / Q000235:genetics / Q000378:metabolism; D005976:Glutaral / Q000737:chemistry; D013294:Lactococcus lactis / Q000235:genetics / Q000378:metabolism*; D020836:Protein Structure, Quaternary; D011993:Recombinant Fusion Proteins / Q000096:biosynthesis / Q000737:chemistry / Q000235:genetics / Q000302:isolation & purification; D012097:Repressor Proteins / Q000096:biosynthesis* / Q000737:chemistry / Q000235:genetics / Q000302:isolation & purification*
chemical_list: D001426:Bacterial Proteins; D003432:Cross-Linking Reagents; D004268:DNA-Binding Proteins; D011993:Recombinant Fusion Proteins; D012097:Repressor Proteins; C069286:catabolite control proteins, bacteria; D005976:Glutaral