Description
RPB12 (also called RPB10 ) is shared between all three RNA polymerases and is homologous to the archaeal P subunit of RNA polymerase. Like RPB10, it is essential for yeast cell viability. RPB12 is also a zinc-binding protein with a canonical tetra-coordinating zinc motif but binds zinc in vitro much less efficiently than the RPB10 subunit. It has been shown to interact with both RPB1 and RPB2 in vitro and the human subunit can functionally substitute for its yeast counterpart