RNA polymerase I (also known as Pol I) is the polymerase that transcribes ribosomal RNA, which accounts for over 50% of the total RNA synthesized in a cell, in higher eukaryotes. It does not transcribe 5S rRNA, which is synthesized by RNA polymerase III. == Structure and function == Pol I is a 590 kDa enzyme that consists of 14 protein subunits (polypeptides), and its crystal structure in the yeast Saccharomyces cerevisiae was solved at 2.8Å resolution in 2013.
RNA polymerase I (also known as Pol I) is the polymerase that transcribes ribosomal RNA, which accounts for over 50% of the total RNA synthesized in a cell, in higher eukaryotes. It does not transcribe 5S rRNA, which is synthesized by RNA polymerase III. == Structure and function == Pol I is a 590 kDa enzyme that consists of 14 protein subunits (polypeptides), and its crystal structure in the yeast Saccharomyces cerevisiae was solved at 2.8Å resolution in 2013.
Source: Wikipedia "RNA polymerase I" · CC BY-SA 4.0
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