Synthesis and Incorporation of k2U into RNA

Nainyte, Milda und Carell, Thomas (18. Februar 2020): Synthesis and Incorporation of k2U into RNA. In: Helvetica Chimica Acta, Bd. 103, Nr. 3, e2000016

Abstract

Lysidine (k2C) is one of the most modified pyrimidine RNA bases. It is a cytidine nucleoside, in which the 2-oxo functionality of the heterocycle is replaced by the ɛ-amino group of the amino acid lysine. As such, lysidine is an amino acid-containing RNA nucleoside that combines directly genotype (C-base) with phenotype (lysine amino acid). This makes the compound particularly important in the context of theories about the origin of life and here especially for theories that target the origin of translation. Here, we report the total synthesis of the Uderivative of lysidine (k2U), which should have the same base pairing characteristics as k2C if it exists in the isoC- like tautomeric form. To investigate this question, we developed a phosphoramidite building block for k2U, which allows its incorporation into RNA strands. Within RNA, k2U can base pair with the counter base U and isoG, confirming that k2U prefers an isoC-like tautomeric structure that is also known to dominate for k2C. The successful synthesis of a k2U phosphoramidite and its use for RNA synthesis now paves the way for the preparation of a k2C phosphoramidite and RNA strands containing k2C.

• Dokumententyp: Zeitschriftenartikel
• EU Funded Grant Agreement Number: 741912
• EU-Projekte: Horizon 2020 > ERC Grants > ERC Advanced Grant > ERC Grant 741912: EPiR - The Chemical Basis of RNA Epigenetics
• Publikationsform: Publisher's Version
• Keywords: lysidine; modified RNA bases; RNA; nucleosides; origin of life; prebiotic chemistry
• Fakultät: Chemie und Pharmazie > Department Chemie
• Themengebiete: 500 Naturwissenschaften und Mathematik > 540 Chemie
• ISSN: 1522-2675
• Sprache: Englisch

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