Z-DNA at the crossroads: untangling its role in genome dynamics

Area of Science:

• Molecular Biology
• Genetics
• Structural Biology

Background:

• DNA typically adopts a right-handed B-DNA conformation.
• Left-handed Z-DNA is a noncanonical DNA structure with distinct structural and functional properties.
• Z-DNA was once considered a structural curiosity but is now recognized in nuclear and mitochondrial DNA (mtDNA).

Purpose of the Study:

• To review the structure and function of Z-DNA in the genome.
• To address challenges in identifying and studying Z-DNA's biological roles.
• To evaluate intracellular factors regulating Z-DNA and discuss new research tools.

Main Methods:

• Literature review of Z-DNA structure, function, and regulation.
• Critical evaluation of intracellular factors influencing Z-DNA formation.
• Discussion of technological and methodological advancements for Z-DNA research.

Main Results:

• Z-DNA formation is implicated in nuclear and mtDNA with significant biological implications.
• Understanding Z-DNA's roles is limited by a lack of effective study tools.
• Several intracellular factors can modulate and regulate Z-DNA formation.

Conclusions:

• Z-DNA is a biologically relevant DNA conformation beyond B-DNA.
• Overcoming research challenges requires novel technologies and methodologies.
• Further investigation is crucial to fully elucidate Z-DNA's genomic functions.