Guanosine

Guanosine is a purine nucleoside composed of guanine linked to ribose. It occurs in RNA and serves as a precursor to guanine nucleotides.

Guanine: Guanine is a purine nucleobase found in DNA and RNA, where it pairs with cytosine. Guanine is the nitrogenous base attached to ribose in guanosine.
Guanosine kinase: Guanosine kinase is an enzyme that phosphorylates guanosine to form guanosine monophosphate. It can directly convert guanosine into a guanine nucleotide.
RNA: RNA is a nucleic acid composed of nucleotide chains that carry, regulate, or express genetic information. Guanosine residues occur throughout RNA as part of its nucleotide sequence.
Adenosine: Adenosine is a purine nucleoside composed of adenine linked to ribose. It has the same sugar as guanosine but a different purine base.
Ribose: Ribose is a five-carbon sugar found in RNA and several cellular molecules. Ribose supplies the sugar portion of guanosine.
Purine nucleoside phosphorylase: Purine nucleoside phosphorylase catalyzes phosphorolysis of purine nucleosides, producing a base and ribose-1-phosphate. It breaks down guanosine into guanine and ribose-1-phosphate.
RNA splicing: RNA splicing removes introns from precursor RNA and joins the remaining exons. Guanosine-containing RNA participates in spliceosomal structures and reactions.
Inosine: Inosine is a purine nucleoside composed of hypoxanthine linked to ribose. It is a related nucleoside formed through guanosine deamination.
Nucleoside: A nucleoside consists of a nitrogenous base linked to a sugar, without phosphate groups. Guanosine is one specific nucleoside, distinguished by guanine and ribose.
Guanosine monophosphate: Guanosine monophosphate is a nucleotide consisting of guanine, ribose, and one phosphate group. Adding phosphate to guanosine yields this nucleotide.

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