Saccharomyces_cerevisiaeFamily: RNA_pol_Rpb5_N Number of Genes: 1
Ensembl IDSymbolEntrez IDRBD RBPome PRIExpresion PathwayPhenotype ParalogOrthologGO



Rpb5 has a bipartite structure which includes a eukaryote-specific N-terminal domain and a C-terminal domain resembling the archaeal RNAP subunit H [1,2]. The N-terminal domain is involved in DNA binding and is part of the jaw module in the RNA pol II structure [3]. This module is important for positioning the downstream DNA.


Prokaryotes contain a single DNA-dependent RNA polymerase (RNAP; EC) that is responsible for the transcription of all genes, while eukaryotes have three classes of RNAPs (I-III) that transcribe different sets of genes. Each class of RNA polymerase is an assemblage of ten to twelve different polypeptides. Certain subunits of RNAPs, including RPB5 (POLR2E in mammals), are common to all three eukaryotic polymerases. RPB5 plays a role in the transcription activation process. Eukaryotic RPB5 has a bipartite structure consisting of a unique N-terminal region, plus a C-terminal region that is structurally homologous to the prokaryotic RPB5 homologue, subunit H (gene rpoH) (INTERPRO) [PUBMED:10841538, PUBMED:10191143, PUBMED:1729711, PUBMED:10841537].


  1. Todone F, Weinzierl RO, Brick P, Onesti S; , Proc Natl Acad Sci U S A 2000;97:6306-6310.: Crystal structure of RPB5, a universal eukaryotic RNA polymerase subunit and transcription factor interaction target. PUBMED:10841537 EPMC:10841537 .

  2. Yee A, Booth V, Dharamsi A, Engel A, Edwards AM, Arrowsmith CH; , Proc Natl Acad Sci U S A 2000;97:6311-6315.: Solution structure of the RNA polymerase subunit RPB5 from Methanobacterium thermoautotrophicum. PUBMED:10841538 EPMC:10841538 .

  3. Cramer P, Bushnell DA, Fu J, Gnatt AL, Maier-Davis B, Thompson NE, Burgess RR, Edwards AM, David PR, Kornberg RD; , Science 2000;288:640-649.: Architecture of RNA polymerase II and implications for the transcription mechanism. PUBMED:10784442 EPMC:10784442 .

  4. Steczkiewicz K, Muszewska A, Knizewski L, Rychlewski L, Ginalski K;, Nucleic Acids Res. 2012;40:7016-7045.: Sequence, structure and functional diversity of PD-(D/E)XK phosphodiesterase superfamily. PUBMED:22638584 EPMC:22638584.