nicotinate-nucleotide-dimethylbenzimidazole phosphoribosyltransferase activity
nicotinate-nucleotide-dimethylbenzimidazole phosphoribosyltransferase activity
Catalysis of the reaction: 5,6-dimethylbenzimidazole + nicotinate D-ribonucleotide = alpha-ribazole 5'-phosphate + H+ + nicotinate.