What does guanosine mean?
Guanosine is a biochemical nucleoside made by joining guanine, one of the purine bases used in nucleic acids, to ribose, the five-carbon sugar found in RNA. It is one of the four building-block nucleosides represented in RNA, alongside adenosine, cytidine, and uridine, and is closely related to the nucleotide compounds GTP and GDP that act in cellular energy transfer and signaling. Guanosine also has a prominent signaling role as a precursor of cyclic guanosine monophosphate, commonly abbreviated cGMP, which participates in pathways regulating hormones, neurotransmitters, and vascular function. In medicine and molecular biology, guanosine may be studied as a supplement, a regulator of cellular processes, or a component of oligonucleotide drugs, but it remains principally a technical biochemical term rather than an everyday word. The name reflects its molecular construction: guanine supplies the base and ribose supplies the sugar. Knowing the distinction is useful because guanine, guanosine, and guanine nucleotides are related but not interchangeable.
nounA purine nucleoside formed by linking guanine to ribose. It is a building block used in RNA and a precursor of biologically important guanine nucleotides, including cyclic guanosine monophosphate.
- A purine nucleoside composed of guanine and ribose, used as a building block in RNA and as a biochemical precursor of guanine nucleotides.
"The pathway converts guanosine into cyclic guanosine monophosphate, an important cellular messenger."
"The researchers measured changes in intracellular guanosine after stimulating the signaling pathway."
"The pathway converts guanosine into cyclic guanosine monophosphate, a key cellular messenger."
The plural is uncommon and is mainly used when referring to multiple guanosine molecules or distinct quantities of the compound.
"The researchers compared the levels of guanosines obtained from the two samples."
Guanosine is RNA's G in nucleoside form—and its close relative cGMP helps cells turn signals into action.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does guanosine come from?
The name guanosine reflects the combination of guanine, the nitrogenous base, and ribose, the sugar: it is the ribonucleoside corresponding to guanine. It belongs to modern biochemical nomenclature rather than being an inherited Latin or Greek word. Related terms such as guanylate and guanylation derive from guanine and describe biochemical reactions involving guanine groups.
How guanosine is actually used
This is specialized biochemical and pharmaceutical vocabulary, uncommon in general speech. It is normally used in the singular when referring to the compound, although guanosine molecules may be counted in scientific prose.
Easily confused with guanosine
Guanine is the purine base, whereas guanosine is that base attached to the sugar ribose.
Adenosine contains adenine attached to ribose, while guanosine contains guanine attached to ribose.