Reference: Stettler S, et al. (1992) An essential and specific subunit of RNA polymerase III (C) is encoded by gene RPC34 in Saccharomyces cerevisiae. J Biol Chem 267(30):21390-5

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Abstract


The RPC34 gene of Saccharomyces cerevisiae was cloned by immunological screening, using antibodies raised against the C34 polypeptide of the RNA polymerase III (C). This single copy gene was located near the centromere of chromosome XIV. It included a coding sequence of 317 amino acids that strictly matched two internal oligopeptides of C34. This polypeptide is a specific component of RNA polymerase III, with no significant homology to any other RNA polymerase subunit known so far. It is an essential subunit, since inactivation by deletion or nonsense mutations led to a recessive lethal phenotype. Moreover, a partially blocked mutant, rpc34-F297, had a reduced tRNA synthesis in vivo but no detectable effect on 5 S RNA synthesis. The latter phenotype was observed for all conditionally defective RNA polymerase III mutants isolated so far.

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Journal Article | Research Support, Non-U.S. Gov't
Authors
Stettler S, Mariotte S, Riva M, Sentenac A, Thuriaux P
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