title: Terminal protein-primed amplification of heterologous DNA with a minimal replication system based on phage Phi29.
abstract: The DNA amplification performed by terminal protein-primed replication systems has not yet been developed for its general use to produce high amounts of DNA linked to terminal protein (TP). Here we present a method to amplify in vitro heterologous DNAs using the Φ29 DNA replication machinery and producing DNA with TP covalently attached to the 5' end. The amplification requires four Φ29 proteins, DNA polymerase, TP, single-stranded DNA binding protein and double-stranded DNA binding protein (p6). The DNA to be amplified is inserted between two sequences that are the Φ29 DNA replication origins, consisting of 191 and 194 bp from the left and right ends of the phage genome, respectively. The replication origins do not need to have TP covalently attached beforehand to be functional in amplification and they can be joined to the DNA to be amplified by cloning or ligation. The facts that two functional origins were required at the ends of a linear template DNA and that the kinetics of DNA synthesis was very similar to that obtained using the TP-containing Φ29 genome as template support the proposal that genuine amplification is taking place. Amplification factors of 30-fold have been obtained. Possible applications of DNAs produced by this method are discussed.
authors: Instituto de Biología Molecular Eladio Viñuela, Centro de Biología Molecular, Universidad Autónoma, Universidad Autónoma, Cantoblanco, 28049 Madrid, Spain.
authors: Mario
authors: M
authors: Mencía
authors: Pablo
authors: P
authors: Gella
authors: Ana
authors: A
authors: Camacho
authors: Miguel
authors: M
authors: de Vega
authors: Margarita
authors: M
authors: Salas
mesh_terms: D001407:Bacillus / Q000821:virology; D017103:Bacillus Phages / Q000235:genetics*; D001483:Base Sequence; D004247:DNA / Q000235:genetics*; D004261:DNA Replication; D004279:DNA, Viral / Q000235:genetics*; D004259:DNA-Directed DNA Polymerase / Q000378:metabolism; D016679:Genome, Viral; D007700:Kinetics; D008957:Models, Genetic; D008969:Molecular Sequence Data; D009841:Oligonucleotides / Q000235:genetics; D010957:Plasmids / Q000378:metabolism; D018741:Replication Origin
chemical_list: D004279:DNA, Viral; D009841:Oligonucleotides; D004247:DNA; D004259:DNA-Directed DNA Polymerase