Polymerase that creates the 3'-poly(A) tail of mRNA's. May acquire specificity through interaction with a cleavage and polyadenylation factor (By similarity). ATP + RNA(n) = diphosphate + RNA(n)-3'-adenine ribonucleotide Binds 2 magnesium ions. Also active with manganese. The C.albicans mating-type-like (MTL) locus contains, in addition to the genes for the regulatory proteins (MTLA1, MTLA2, MTLALPHA1 and MTLALPHA2), a and alpha idiomorphs of a phosphatidylinositol kinase (PIKA and PIKALPHA), a poly(A) polymerase (PAPA and PAPALPHA) and an oxysterol binding protein-like protein (OBPA and OBPALPHA). PAPALPHA is not represented in the genomic sequence of strain SC5314 because that haploid assembly includes the mating type a allele of this locus. Belongs to the poly(A) polymerase family.