Detection of SARS-CoV-2 spike protein D614G mutation using μTGGE

Area of Science:

• Molecular Biology
• Virology
• Biotechnology

Background:

• Accurate detection of SARS-CoV-2 mutations is crucial for public health.
• Monitoring viral evolution, transmission, virulence, and vaccine efficacy requires rapid mutation identification.
• The study focuses on the D614 and G614 variants of the SARS-CoV-2 spike protein.

Purpose of the Study:

• To develop a micro temperature gradient gel electrophoresis (μTGGE) system for identifying SARS-CoV-2 spike protein variants.
• To assess the efficacy of μTGGE in distinguishing between the D614 and G614 variants.
• To provide a rapid, precise, and cost-effective method for SARS-CoV-2 mutation detection.

Main Methods:

• In vitro synthesized D614 and G614 gene fragments of the SARS-CoV-2 spike protein were used.
• Polymerase chain reaction (PCR) amplification of the gene fragments.
• Analysis of amplified fragments using micro temperature gradient gel electrophoresis (μTGGE).

Main Results:

• Distinctly dissimilar migration patterns were observed for the D614 and G614 variants on polyacrylamide gel.
• μTGGE readily discerned the differences in migration patterns between the variants.
• The mid-melting pattern of the D614 variant was notably shorter than that of the G614 variant.

Conclusions:

• μTGGE effectively detects SARS-CoV-2 spike protein D614 and G614 variants rapidly and precisely.
• This method eliminates the need for sequencing, offering a cost-effective alternative.
• The developed μTGGE approach shows significant potential for point-of-care mutation assays for SARS-CoV-2 and other pathogens.