RRC ID 70425
Author Bhardwaj V, Vishwakarma P, Lynn A, Sharma N.
Title Deletion of the non-essential Rpb9 subunit of RNA polymerase II results in pleiotropic phenotypes in Schizosaccharomyces pombe.
Journal Biochim Biophys Acta Proteins Proteom
Abstract Schizosaccharomyces pombe RNA polymerase II comprises twelve different subunits. Its Rpb9 subunit comprises 113 amino acids, and is the only non-essential subunit of S. pombe RNA polymerase II. However, its functions have not been studied in S. pombe. The results presented in this study demonstrate that Rpb9 is involved in regulating growth under optimum and certain stress conditions in S. pombe. To further address the role (s) of various domains of this subunit in regulating these phenotypes, deletion mutant analysis was done. We observed that the region spanning 1-74 amino acids, encompassing the amino-terminal zinc finger domain and the linker region of Rpb9 was able to rescue the phenotypes associated with rpb9+deletion. We also demonstrate that the functions of this subunit are only partially conserved among yeast and humans. Our computational biology approaches provide a structural basis for the differential role of various Rpb9 domains in S. pombe. Furthermore, using these tools we show that there has been a co-evolution of the interaction residues between the Rpb9 subunit and the two largest subunits of RNA polymerase II, allowing for a more stringent organism-specific packing. Taken together, our results have provided functional and structural insights into the Rpb9 subunit of S. pombe.
Volume 1869(7)
Pages 140654
Published 2021-7-1
DOI 10.1016/j.bbapap.2021.140654
PII S1570-9639(21)00060-1
PMID 33775921
MeSH Amino Acid Sequence / genetics Phenotype Protein Binding / genetics RNA Polymerase II / genetics* RNA Polymerase II / metabolism Saccharomyces cerevisiae / genetics Saccharomyces cerevisiae Proteins / metabolism Schizosaccharomyces / genetics Schizosaccharomyces / metabolism Schizosaccharomyces pombe Proteins / genetics* Schizosaccharomyces pombe Proteins / metabolism Sequence Homology, Amino Acid Transcription Factors / metabolism Transcription, Genetic / genetics
IF 2.609