Тимидин

Описание

Thymidine is a pyrimidine nucleoside that is composed of the pyrimidine base thymine attached to the sugar deoxyribose. As a constituent of DNA, thymidine pairs with adenine in the DNA double helix. In cell biology it is used to synchronize the cells in G₁/early S phase.

Химические свойства

White needle crystal, soluble in methanol, ethanol, DMSO and other organic solvents.

Физические свойства

Thymidine can exist in vitro conditions as a solid (as white crystals or as white crystalline powder). Under standard temperature and pressure, the stability of this compound is very high. As a part of DNA structure, thymidine occurs in living organisms (also in DNA viruses). Therefore, it is a non-toxic compound. In RNA, there is uridine instead of thymidine. Uridine is formed from the combination of uracil with ribose sugar. The key difference between thymine and thymidine is that thymine is a nucleobase, whereas thymidine is a nucleoside.

Использование

Thymidine is used in the syntheses of active pharmaceutical ingredient such as zidovudine. It also pairs with deoxyadenosine in double-stranded deoxyribonucleic acid. It is used to synchronize the cells in G1/early S phase in cell biology.

Определение

ChEBI: Thymidine is a pyrimidine 2'-deoxyribonucleoside having thymine as the nucleobase. It has a role as a metabolite, a human metabolite, an Escherichia coli metabolite and a mouse metabolite. It is functionally related to a thymine. It is an enantiomer of a telbivudine.

Общее описание

Thymidine is also referred to as pyrimidine deoxynucleoside. Deoxythymidine is a nucleoside present in DNA. In a DNA double stranded structure, thymidine pairs with deoxyadeninosine.

Профиль безопасности

Moderately toxic by intraperitoneal route. An experimental teratogen. Experimental reproductive effects. Human mutation data reported. When heated to decomposition it emits toxic fumes of NOx.

Методы очистки

Crystallise -thymidine from ethyl acetate, MeOH/Et2O (m 188o) or H2O (as 2H2O m 189o). It is soluble in water and hot organic solvents. The picrate has m 230o (from EtOH).