The addition of a tail of polyadenylic acid (POLY A) to the 3' end of mRNA (RNA, MESSENGER). Polyadenylation involves recognizing the processing site signal, (AAUAAA), and cleaving of the mRNA to create a 3' OH terminal end to which poly A polymerase (POLYNUCLEOTIDE ADENYLYLTRANSFERASE) adds 60-200 adenylate residues. The 3' end processing of some messenger RNAs, such as histone mRNA, is carried out by a different process that does not include the addition of poly A as described here.

Descriptor ID	D026723
MeSH Number(s)	G02.111.760.225.710 G03.839.225.710 G05.308.700.225.710
Concept/Terms	Polyadenylation Polyadenylation Polyadenylations

Below are MeSH descriptors whose meaning is more general than "Polyadenylation".

Below are MeSH descriptors whose meaning is related to "Polyadenylation".

Below are MeSH descriptors whose meaning is more specific than "Polyadenylation".