Rpb7 subunit of RNA polymerase II interacts with an RNA-binding protein involved in processing of transcripts.

ABSTRACT: Rpb4-Rpb7, a dissociable subcomplex of RNA polymerase II (pol II), is required for transcription initiation. To understand the role of Rpb7 in transcription initiation or other processes in transcription, we carried out a two-hybrid screen for proteins that interact with Rpb7 of the fission yeast Schizosaccharomyces pombe. The screen identified the S.pombe homolog of the Saccharomyces cerevisiae Nrd1, an RNA-binding protein implicated in 3' end formation of small nucleolar and small nuclear RNAs transcribed by pol II. The S.pombe protein, named Seb1 for seven binding, was essential for cell viability, and bound directly to Rpb7 in vitro. Saccharomyces cerevisiae Rpb7 also interacted with Nrd1, indicating that the interaction is conserved in evolution. Glu166 and/or Asp167 of S.pombe Rpb7,

SUBMITTER: Mitsuzawa H 

PROVIDER: S-EPMC169969 | biostudies-literature | 2003 Aug

REPOSITORIES: biostudies-literature