Source 1primary paper2025MED
Toolkit/mixed quinoline-pyridine aromatic oligoamide helical foldamers
mixed quinoline-pyridine aromatic oligoamide helical foldamers
Also known as: mixed quinoline-pyridine foldamers, quinoline/pyridine aromatic oligoamide helical foldamers
Taxonomy: Mechanism Branch / Architecture. Workflows sit above the mechanism and technique branches rather than replacing them.
Summary
We investigated the G-quadruplex (G4) binding selectivity of short aromatic oligoamide helical foldamers comprising quinoline (Q) and pyridine (P) units... Mixed quinoline-pyridine foldamers are thus a promising class of selective G4 ligands
Usefulness & Problems
Why this is useful
These helical aromatic oligoamide foldamers bind G-quadruplex DNA and show selectivity for parallel G4 conformations. The scaffold uses quinoline and pyridine subunits to tune binding behavior.; selective binding of G-quadruplex structures; preferential targeting of parallel G4 structures; modular tuning of G4 affinity and selectivity
Source:
These helical aromatic oligoamide foldamers bind G-quadruplex DNA and show selectivity for parallel G4 conformations. The scaffold uses quinoline and pyridine subunits to tune binding behavior.
Source:
selective binding of G-quadruplex structures
Source:
preferential targeting of parallel G4 structures
Source:
modular tuning of G4 affinity and selectivity
Problem solved
The scaffold addresses the need for G4 ligands with improved conformational selectivity rather than broad, nonspecific G4 recognition. Its modularity is presented as a route to improve both affinity and selectivity.; providing selective G4 ligands with conformational preference; enabling scaffold modularity to improve affinity and selectivity
Source:
The scaffold addresses the need for G4 ligands with improved conformational selectivity rather than broad, nonspecific G4 recognition. Its modularity is presented as a route to improve both affinity and selectivity.
Source:
providing selective G4 ligands with conformational preference
Source:
enabling scaffold modularity to improve affinity and selectivity
Problem links
enabling scaffold modularity to improve affinity and selectivity
LiteratureThe scaffold addresses the need for G4 ligands with improved conformational selectivity rather than broad, nonspecific G4 recognition. Its modularity is presented as a route to improve both affinity and selectivity.
Source:
The scaffold addresses the need for G4 ligands with improved conformational selectivity rather than broad, nonspecific G4 recognition. Its modularity is presented as a route to improve both affinity and selectivity.
providing selective G4 ligands with conformational preference
LiteratureThe scaffold addresses the need for G4 ligands with improved conformational selectivity rather than broad, nonspecific G4 recognition. Its modularity is presented as a route to improve both affinity and selectivity.
Source:
The scaffold addresses the need for G4 ligands with improved conformational selectivity rather than broad, nonspecific G4 recognition. Its modularity is presented as a route to improve both affinity and selectivity.
Taxonomy & Function
Primary hierarchy
Mechanism Branch
Architecture: A reusable architecture pattern for arranging parts into an engineered system.
Mechanisms
conformational selectivity for parallel g4 topologiesConformational UncagingOligomerizationpi-stacking with external g-quartetsselective g-quadruplex bindingsteric restriction-dependent recognitionTechniques
No technique tags yet.
Target processes
No target processes tagged yet.
Input: Chemical
Implementation Constraints
cofactor dependency: cofactor requirement unknownencoding mode: genetically encodedimplementation constraint: context specific validationoperating role: actuatorswitch architecture: uncaging
Use requires the synthetic foldamer scaffold built from quinoline and pyridine units and access to G4-forming nucleic acid targets. Structural or biophysical assays such as crystallography or NMR were used in this study to characterize binding.; requires quinoline and pyridine unit composition; binding behavior depends on foldamer length and bulkiness; selectivity depends on G4 topology and quartet accessibility
The abstract does not show that these foldamers solve delivery, cellular activity, or therapeutic deployment problems. Their selectivity is also constrained by G4 topology and steric accessibility.; conformational selectivity depends on steric accessibility of external G-quartets; bulkiness of oligomers with four or more subunits imposes steric restrictions on G4 binding
Validation
Cell-freeBacteriaMammalianMouseHumanTherapeuticIndep. Replication
Supporting Sources
Ranked Claims
Mixed quinoline-pyridine aromatic oligoamide helical foldamers selectively bind G-quadruplexes and prefer parallel G4 structures, especially when external G-quartets are sterically accessible.
We found that the foldamers bind with 1:1 and 2:1 stoichiometries and prefer parallel G4 structures, especially when the external G-quartets are sterically accessible.
binding stoichiometry 1:1 and 2:1
Conformational selectivity of the foldamers arises from the bulkiness of oligomers with four or more subunits, which imposes steric restrictions on G4 binding, while pyridine-derived flexibility improves affinity.
The conformational selectivity of foldamers originates from the bulkiness of oligomers with four or more subunits, which imposes steric restrictions on G4 binding. The flexibility provided by the pyridine subunits was also key to improve affinity.
These foldamers can selectively target telomeric sequence variants containing adenine-to-thymine loop mutations.
Foldamers can also selectively target sequence variants of the telomeric sequences containing adenine-to-thymine mutation in the loops.
QQPQ binds a parallel G4 by having two quinoline subunits c0-stack with an external G-quartet, and NMR supports targeting of the 3' and 5' ends of the G4.
A crystal structure of the tetramer QQPQ with the parallel G4 formed by dTGGGTTGGGTTGGGTTGGGT shows two quinoline subunits interacting with an external G-quartet through c0-stacking, and solution nuclear magnetic resonance (NMR) confirms that the foldamer targets the 3' and 5' ends of this G4.
Approval Evidence
1 source3 linked approval claimsfirst-pass slug mixed-quinoline-pyridine-aromatic-oligoamide-helical-foldamers
We investigated the G-quadruplex (G4) binding selectivity of short aromatic oligoamide helical foldamers comprising quinoline (Q) and pyridine (P) units... Mixed quinoline-pyridine foldamers are thus a promising class of selective G4 ligands
Source:
binding selectivitysupports
Mixed quinoline-pyridine aromatic oligoamide helical foldamers selectively bind G-quadruplexes and prefer parallel G4 structures, especially when external G-quartets are sterically accessible.
We found that the foldamers bind with 1:1 and 2:1 stoichiometries and prefer parallel G4 structures, especially when the external G-quartets are sterically accessible.
Source:
mechanistic interpretationsupports
Conformational selectivity of the foldamers arises from the bulkiness of oligomers with four or more subunits, which imposes steric restrictions on G4 binding, while pyridine-derived flexibility improves affinity.
The conformational selectivity of foldamers originates from the bulkiness of oligomers with four or more subunits, which imposes steric restrictions on G4 binding. The flexibility provided by the pyridine subunits was also key to improve affinity.
Source:
sequence selectivitysupports
These foldamers can selectively target telomeric sequence variants containing adenine-to-thymine loop mutations.
Foldamers can also selectively target sequence variants of the telomeric sequences containing adenine-to-thymine mutation in the loops.
Source:
Comparisons
Source-stated alternatives
The web research summary identifies pyridostatin and 360A as nearby comparator G4 ligands mentioned around this paper. The abstract itself does not provide a direct performance comparison against those alternatives.
Source:
The web research summary identifies pyridostatin and 360A as nearby comparator G4 ligands mentioned around this paper. The abstract itself does not provide a direct performance comparison against those alternatives.
Source-backed strengths
prefer parallel G4 structures; selectivity is linked to steric accessibility of external G-quartets; pyridine subunits improve affinity through added flexibility; modular scaffold offers avenues for further optimization
Source:
prefer parallel G4 structures
Source:
selectivity is linked to steric accessibility of external G-quartets
Source:
pyridine subunits improve affinity through added flexibility
Source:
modular scaffold offers avenues for further optimization
Compared with DNA origami
mixed quinoline-pyridine aromatic oligoamide helical foldamers and DNA origami address a similar problem space.
Shared frame: same top-level item type; shared mechanisms: oligomerization; same primary input modality: chemical
Relative tradeoffs: appears more independently replicated; looks easier to implement in practice.
Compared with M2R fluorescence-based biosensor panel
mixed quinoline-pyridine aromatic oligoamide helical foldamers and M2R fluorescence-based biosensor panel address a similar problem space.
Shared frame: same top-level item type; shared mechanisms: conformational_uncaging; same primary input modality: chemical
Compared with UNC10245092
mixed quinoline-pyridine aromatic oligoamide helical foldamers and UNC10245092 address a similar problem space.
Shared frame: same top-level item type; shared mechanisms: conformational_uncaging; same primary input modality: chemical
Relative tradeoffs: appears more independently replicated; looks easier to implement in practice.
Ranked Citations
- 1.