Deoxyribonucleic Acid Extraction from Mars Analog Soils and Their Characterization with Solid-State Nanopores

Area of Science:

• Astrobiology
• Planetary Science
• Biotechnology

Background:

• Life detection on Mars necessitates in situ biomarker detection instruments.
• Solid-state nanopores offer compact, lightweight, and robust solutions for single-molecule detection in space.

Purpose of the Study:

• To advance the application of solid-state nanopores for in-space biomarker detection.
• To demonstrate the feasibility of extracting and detecting deoxyribonucleic acid (DNA) from Mars analog soils using nanopore technology.

Main Methods:

• Developed modified deoxyribonucleic acid (DNA) extraction protocols for Mars analog soils.
• Utilized silicon nitride nanopores for the detection of extracted DNA and analysis of current characteristics.
• Quantified DNA yields and estimated properties across different soil types, extraction methods, and nanopore configurations.

Main Results:

• Successfully extracted and detected DNA from Mars analog soils using nanopore technology.
• Observed significant variation in DNA yields, ranging from 0.9 ng/g to 210 ng/g soil, depending on soil type and extraction method.
• Demonstrated that DNA extraction yields could vary by up to a factor of 50 for a given soil type using different methods.

Conclusions:

• Solid-state nanopore technology is a viable candidate for in-situ life detection on Mars.
• Optimized DNA extraction protocols and nanopore detection methods are crucial for maximizing signal-to-noise ratio.
• Future research should focus on diverse Mars-like soils and enhanced instrumentation for improved biomarker detection.