OddCAPS: a simple, low-cost, universal technique for detecting single nucleotide variants

Area of Science:

• Molecular Biology
• Genetics
• Biotechnology

Background:

• Derived Cleaved Amplified Polymorphic Sequences (dCAPS) assays are established for detecting base substitutions in model organisms.
• dCAPS is increasingly used in diverse species due to advances in sequencing and genome editing.
• A major limitation of dCAPS is the scarcity of suitable genomic targets for primer design and restriction enzyme compatibility.

Purpose of the Study:

• To introduce a novel method, One-step dual-primer dCAPS (OddCAPS), to overcome the limitations of traditional dCAPS.
• To enable the detection of diverse nucleotide changes in a broader range of organisms and DNA sequences.
• To enhance the efficiency and applicability of dCAPS assays.

Main Methods:

• Developed OddCAPS, a modification using three primers in a single PCR reaction.
• Employed an intermediate primer at a lower concentration (1/10-1/100) relative to other primers to sequentially introduce base substitutions.
• Engineered up to four base changes within the amplicon to facilitate restriction enzyme recognition.

Main Results:

• OddCAPS successfully generates the desired product in a single-tube, one-step PCR.
• The method enables the introduction of multiple engineered base changes, increasing the likelihood of utilizing common restriction enzymes.
• Demonstrated the potential to detect any single-nucleotide variant in biological or synthetic DNA using eight common restriction enzymes.

Conclusions:

• OddCAPS is an effective modification of dCAPS assays, addressing limitations in primer design and enzyme compatibility.
• This technique expands the utility of dCAPS for detecting nucleotide variations across various biological systems.
• OddCAPS offers a versatile and efficient approach for genetic analysis and mutation detection.