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Open research questions in DNA and Nucleic Acid Chemistry

29 unresolved questions extracted from the limitations and future-work sections of 157 DNA and Nucleic Acid Chemistry papers in our library. Each links back to the study that raised it.

What the literature leaves open

  • Single nucleotide polymorphisms (SNPs) in the AAG gene occur frequently in populations and tumors, but the functional impact of most variants remains unknown.

    Substrate-Specific Inactivation of Human AAG by Tumor-Associated Single Nucleotide Polymorphic Variants · 2026 · DOI

  • Although many putative G4-forming sequences are predicted to exist, it remains unclear which ones fold in cells at any given time and what mechanisms drive their formation.

    The G-force in the genome: Unknowns on the functional flairs of DNA G-quadruplexes · 2026 · DOI

  • Whether analogous interactions occur with Rad51 or Dmc1 remains to be established experimentally. Whether analogous structural solutions have evolved elsewhere in biology remains an open question, but the geometric framework presented here provides a basis for addressing that question experimentally.

    Recombinogenic G-quadruplexes in the Newtonian DNA Sequence Space · 2026 · DOI

  • We expect this insight to aid in the evaluation of SYBR Gold-based measurements of nucleic acid abundance and spark further studies into the binding behaviour of the SYBR family dyes.

    SYBR Gold staining of single stranded nucleic acids is strongly influenced by the presence of guanosines · 2026 · DOI

  • 8 convert Version 6’s open question into a strengthened one: two further tempting local stores (regulatory density; the developmental brake) are removed under proper controls, and the value continues to behave as a global, multi-locus parameter — in the genome, but not localizable — whose actual setting is read only from the functional/runtime layer (Section 37).

    Deterministic Two-Layer Interpretation of DNA — Position as Grammar, Quantity as Runtime (v8: A Self-Gating Interpreter with Zero Hand-Tuned Parameters) · 2026 · DOI

  • DNA translocases that remodel stressed replication forks may play a role in the response to G-quadruplexes encountered during replicative DNA synthesis; however, it remains to be definitively shown that fork regression is elicited upon G4-induced stalling.

    Rare genetic diseases associated with G-quadruplex-induced replication stress · 2026 · DOI

  • Reductive methods for generating multiply charged DNA cation radicals and diradicals from oligonucleotides like dGCGAAGC with Watson-Crick pairing need to be systematically expanded and characterized. Current spectroscopic validation of di- and trication radicals remains preliminary.

    Flying DNA Cation Radicals in the Gas Phase: Generation and Action Spectroscopy of Canonical and Noncanonical Nucleobase Forms · 2021 · DOI

  • IRMPD ion spectroscopy data interpretation is limited when based on calculated harmonic frequencies for oligonucleotide ions with strong intramolecular hydrogen bonds. Anharmonic computational approaches are needed to better account for hydrogen bonding effects in these systems.

    Flying DNA Cation Radicals in the Gas Phase: Generation and Action Spectroscopy of Canonical and Noncanonical Nucleobase Forms · 2021 · DOI

  • TD-DFT calculations of open-shell DNA cation radical systems suffer from artifacts due to high-spin transitions, requiring inclusion of >100 excited electronic states to cover the experimental wavelength range. Improved computational methods for treating these systems are needed.

    Flying DNA Cation Radicals in the Gas Phase: Generation and Action Spectroscopy of Canonical and Noncanonical Nucleobase Forms · 2021 · DOI

  • Computational treatment of larger open-shell systems poses significant challenges for spectral interpretation in DNA cation radicals. Born-Oppenheimer molecular dynamics with ab initio treatment of electron interactions is needed to map potential energy surfaces and identify conformationally optimized transition states for DNA cation radical dissociations.

    Flying DNA Cation Radicals in the Gas Phase: Generation and Action Spectroscopy of Canonical and Noncanonical Nucleobase Forms · 2021 · DOI

  • Cold-ion UV-visPD action spectroscopy of DNA cation radicals needs to be developed and applied to improve the distinction of conformers, which are currently obscured in broad vibronic spectra of thermal ions. This would provide more specific structural characterization.

    Flying DNA Cation Radicals in the Gas Phase: Generation and Action Spectroscopy of Canonical and Noncanonical Nucleobase Forms · 2021 · DOI

  • New oxidative charge-transfer methods are needed to access cation radicals of oligonucleotides beyond guanosine, which is readily ionizable. Current methods are limited in their ability to generate cation radicals from other nucleobases in oligonucleotide sequences.

    Flying DNA Cation Radicals in the Gas Phase: Generation and Action Spectroscopy of Canonical and Noncanonical Nucleobase Forms · 2021 · DOI

  • The paper reports that bis(1-methyluracil-5-yl)methane and bis(1-methyluracil-5-yl)methylbenzene ligands can anchor metals through deprotonated N3 sites or form hydrogen bonds through Watson-Crick edges, but does not systematically vary the methylene bridge length or aromatic spacer structure. Synthesis and characterization of analogous ligands with extended C2-C6 linkers and different aromatic cores is needed to establish structure-assembly relationships.

    Merging Metal–Nucleobase Chemistry With Supramolecular Chemistry · 2018 · DOI

  • The formation of polymeric products through Ag+-bridged M2L2 (PdII) cycles is mentioned only briefly without structural details, synthetic conditions, or characterization data. Full structural elucidation, solubility/stability studies, and comparison of nuclearity-control strategies between Pt, Pd, and Ag-based assembly pathways are required.

    Merging Metal–Nucleobase Chemistry With Supramolecular Chemistry · 2018 · DOI

  • The slippage mechanism of uracil rings between O4,N3 and N3,O2 coordination sites in M4L2 complexes (mentioned in Fig. 29 caption) is described only schematically. Dynamic NMR studies (EXSY, variable-temperature NMR) and computational modeling are needed to quantify the activation barriers and kinetic timescales for this ring-slippage isomerization process.

    Merging Metal–Nucleobase Chemistry With Supramolecular Chemistry · 2018 · DOI

  • In the uracil-based hybrid metallacalix systems (Section 5.3), the paper reports detection of 'additional isomers' by NMR spectroscopy but does not characterize their structures or binding modes. Solid-state crystallographic characterization of these NMR-detected isomers and their relative thermodynamic stability under different reaction conditions (temperature, pH, metal:ligand ratios) must be completed.

    Merging Metal–Nucleobase Chemistry With Supramolecular Chemistry · 2018 · DOI

  • The relationship between pH variation (pH ~4 versus pH ~7) and product selectivity in trans-[Pt(NH3)2(9MeHx-N7)2]2+/[Pd(en)(OH2)2]2+ reactions that yield either Pt6Pd12 spherical versus Pt2Pd2 open-book architectures requires detailed pH-rate profile mapping and protonation state analysis of hypoxanthine ligands across the pH range 3-8.

    Merging Metal–Nucleobase Chemistry With Supramolecular Chemistry · 2018 · DOI

  • The mechanism by which Pd coordination to multiple cytosine sites (N3, N4, O2) labilizes the Pt–N1 bond in Pt2Pd6 metallacalix[4]arene complexes remains incompletely understood. Systematic kinetic and thermodynamic studies are needed to quantify how three-point Pd binding weakens Pt–nucleobase interactions and triggers metal substitution under excess (2,2'-bpy)PdII conditions.

    Merging Metal–Nucleobase Chemistry With Supramolecular Chemistry · 2018 · DOI

  • Glycosylated nucleic acids, including glycoRNAs and bacteriophage genomes, are emerging as key mediators of host-pathogen interactions, yet their synthetic accessibility is severely limited by the inability of polymerases to process substrates bearing simultaneous base and backbone modifications.

    Polymerase Evolution Enables Access to Glycosylated Xeno-Nucleic Acids with Expanded Chemical Functionality · 2026 · DOI

  • Moreover, while G4s have been primarily linked to transcriptional regulation, how this function is achieved remains to be investigated, and the roles of G4s at other genomic regions remain unclear.

    The G-force in the genome: Unknowns on the functional flairs of DNA G-quadruplexes · 2026 · DOI

  • However, the exact microstructure, replication capacity, and ultimate biological relevance of these heterogeneous materials remain open questions.

    Abiotic synthesis of RNase-resistant phosphodiester and pyrophosphate-linked polymers via thermodynamically controlled wet-dry cycling · 2026 · DOI

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29 open questions have been extracted from the limitations and future-work passages of 157 DNA and Nucleic Acid Chemistry papers in our library. Each one below links back to the study that raised it, so you can read the original claim in context.

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