Probing the shielding properties of aptameric protective groups

Area of Science:

• Biochemistry
• Chemical Biology
• Molecular Biology

Background:

• Site-specific derivatization of molecules with identical functional groups is challenging.
• Aptamers offer a novel approach as non-covalent protective groups to enhance reaction regioselectivity.
• Aminoglycoside antibiotics like neomycin B possess multiple chemically similar functional groups.

Purpose of the Study:

• To investigate RNA aptamers for site-specific modification of neomycin B.
• To elucidate the mechanism by which aptamers induce regioselectivity in chemical reactions.
• To understand the influence of aptamer binding characteristics on regioselective outcomes.

Main Methods:

• Utilized a series of well-characterized RNA aptamers known to bind neomycin B.
• Investigated the binding interactions between aptamers and neomycin B.
• Analyzed the regioselective outcomes of chemical transformations in the presence of aptamers.

Main Results:

• Demonstrated that RNA aptamers can effectively enhance the regioselectivity of reactions involving neomycin B.
• Identified that the number of binding sites, binding affinity, and interaction mode are critical factors.
• Proposed a mechanistic model explaining aptamer-induced regioselectivity.

Conclusions:

• RNA aptamers serve as effective non-covalent protective groups for site-specific derivatization.
• Regioselectivity is governed by the intricate details of aptamer-neomycin B interactions.
• This strategy holds potential for precise chemical modification of complex molecules.