The formation from simpler components of queuosines, any of a series of nucleosides found in tRNA and having an additional pentenyl ring added via an NH group to the methyl group of 7-methylguanosine. The pentenyl ring may carry other substituents.

The chemical reactions involving guanine, guanine riboside, a nucleoside with a wide species distribution.

Interacting selectivzely with L-ascorbic acid, a six-carbon carbohydrate-like compound found in fruit and vegetables. It has vitamin C activity in humans and guinea pigs.

The chemical reactions involving 7-methylguanosine, a modified nucleoside that forms a cap at the 5'-terminus of eukaryotic mRNA.

Interacting lelectively with cobalamin (vitamin B12), a water-soluble vitamin characterized by possession of a corrin nucleus containing a cobalt atom.

Any process that modulates the frequency, rate or extent of mRNA 3'-end processing, any process involved in forming the mature 3' end of an mRNA molecule.

Catalysis of the covalent attachment of ubiquitin-like proteins to lysine residues on the target protein. This function may be performed alone or in conjunction with an E3, ubiquitin-like protein ligase.

The breakdown into simpler components of any organic compound that is weakly basic in character and contains an amino or a substituted amino group. Amines are called primary, secondary, or tertiary according to whether one, two, or three carbon atoms are attached to the nitrogen atom.

negative regulation of mRNA 3'-end processing

Any process that stops, prevents or reduces the rate of mRNA 3'-end processing.

small protein activating enzyme activity

Catalysis of the activation of small proteins, such as ubiquitin, through the formation of an ATP-dependent high-energy thioester bond.

The chemical reactions involving oligosaccharides, molecules with between two and (about) 20 monosaccharide residues connected by glycosidic linkages.

Catalysis of the activation of any small protein similar to ubiquitin, through the formation of an ATP-dependent high-energy thioester bond.