title: Improved vector, pHSG664, for direct streptomycin-resistance selection: cDNA cloning with G:C-tailing procedure and subcloning of double-digest DNA fragments.
abstract: A plasmid cloning vector, pHSG664, has been constructed which is suitable for the direct-selection of transformed cells with recombinant DNAs. The plasmid contains the replicon and ApR-gene region of pUC9 ligated to the strA+ (rpsL+) gene derived from pNO1523 [Dean, Gene 15 (1981) 99-102]. The vector contains ten unique restriction sites: EcoRI, HpaI, PvuII, SphI, PstI, SmaI(XmaI), BamHI, SalI(AccI, HincII), XbaI and HindIII. Five sites (bold-face lettering) are located within the coding region of the strA+ gene. Any insertion at the five bold-faced sites or any nucleotide replacement involving the strA+ gene region and the other unique sites can be selected by Ap and Sm double selection in a strA- (SmR) strain such as E. coli HB101. Thus, this vector is useful for cDNA cloning at either the SphI or the PstI site with the G:C-tailing procedure, as well as for the cloning of double-digest DNA segments.
mesh_terms: D001483:Base Sequence; D003001:Cloning, Molecular; D004247:DNA / Q000378:metabolism*; D004262:DNA Restriction Enzymes; D004352:Drug Resistance, Microbial; D004926:Escherichia coli / Q000235:genetics*; D029968:Escherichia coli Proteins; D005798:Genes, Bacterial; D005822:Genetic Vectors; D000091243:Ribosomal Protein S9; D012641:Selection, Genetic; D013307:Streptomycin / Q000494:pharmacology*
chemical_list: D029968:Escherichia coli Proteins; D000091243:Ribosomal Protein S9; C000717190:RpsI protein, E coli; D004247:DNA; D004262:DNA Restriction Enzymes; D013307:Streptomycin