RT info:eu-repo/semantics/article
T1 Revealing the structure of sheer N-Acetylglucosamine, an essential chemical scaffold in glycobiology
A1 Alonso Alonso, Elena Rita
A1 Insausti, Aran
A1 Peña Calvo, María Isabel
A1 Sanz Novo, Miguel
A1 Aguado Vesperinas, Raúl
A1 León Ona, Iker
A1 Alonso Hernández, José Luis
K1 2210 Química Física
AB We explored the conformational landscape of N-acetyl-α-d-glucosamine (α-GlcNAc), a fundamental chemical scaffold in glycobiology. Solid samples were vaporized by laser ablation, expanded in a supersonic jet, and characterized by broadband chirped pulse Fourier transform microwave spectroscopy. In the isolation conditions of the jet, three different structures of GlcNAc have been discovered. These are conclusively identified by comparing the experimental values of the rotational constants with those predicted by theoretical calculations. The conformational preferences are controlled by intramolecular hydrogen bond networks formed between the polar groups in the acetamido group and the hydroxyl groups and dominated in all cases by a strong OH···O═C interaction. We reported an exception to the gauche effect due to the enhanced stability observed for the Tg+ conformer. All the structures present the same disposition of the acetamido group, which explains the highly selective binding of N-acetylglucosamine with different amino acid residues. Thus, the comprehensive structural data provided here shall help to shed some light on the biological role of this relevant amino sugar.
PB ACS (American Chemical Society)
SN 1948-7185
YR 2024
FD 2024
LK https://uvadoc.uva.es/handle/10324/75065
UL https://uvadoc.uva.es/handle/10324/75065
LA eng
NO The Journal of Physical Chemistry Letters, 2024, vol. 15, n. 41, p. 10314-10320
NO Producción Científica
DS UVaDOC
RD 03-abr-2025