Protocol to Mine Unknown Flanking DNA Using PER-PCR for Genome Walking

Area of Science:

• Molecular Biology
• Genomics
• Biotechnology

Background:

• Genome walking is crucial for identifying flanking DNA sequences.
• Existing methods can be complex or species-specific.

Purpose of the Study:

• To present a simple, reliable, and universal genome walking protocol.
• To detail the primer extension refractory PCR (PER-PCR) method.

Main Methods:

• Utilizes three walking primers (WPs) with overlapping regions.
• Employs differential annealing temperatures to generate and amplify specific single-stranded DNA (ssDNA).
• Nested PER-PCR rounds enhance target amplification.

Main Results:

• The PER-PCR protocol successfully identified flanking DNA sequences for two selected genes.
• The method demonstrated universality across species.
• Nested PER-PCR typically yields positive results within two rounds.

Conclusions:

• PER-PCR offers an efficient and accessible approach for genome walking.
• The protocol's design ensures specific amplification of target DNA.
• This technique has broad applications in life sciences and genetic research.