DNA cloning and protein engineering are basic methodologies employed for various applications in all
life-science disciplines. Manipulations of DNA however, could be a lengthy process that slows down subsequent
experiments. To facilitate both DNA cloning and protein engineering, we present Transfer-PCR
(TPCR), a novel approach that integrates in a single tube, PCR amplification of the target DNA from an origin
vector and its subsequent integration into the destination vector. TPCR can be applied for incorporation
of DNA fragments into any desired position within a circular plasmid without the need for
purification of the intermediate PCR product and without the use of any commercial kit. Using several
examples, we demonstrate the applicability of the TPCR platform for both DNA cloning and for multiple-
site targeted mutagenesis. In both cases, we show that the TPCR reaction is most efficient within a
narrow range of primer concentrations. In mutagenesis, TPCR is primarily advantageous for generation
of combinatorial libraries of targeted mutants but could be also applied to generation of variants with
specific multiple mutations throughout the target gene. Adaptation of the TPCR platform should facilitate,
simplify and significantly reduce time and costs for diverse protein structure and functional studies.