Bacterial RNA polymerase subunit omega and eukaryotic RNA polymerase subunit RPB6 are sequence, structural, and functional homologs and promote RNA polymerase assembly.
Minakhin, L., Bhagat, S., Brunning, A., Campbell, E.A., Darst, S.A., Ebright, R.H., Severinov, K.(2001) Proc Natl Acad Sci U S A 98: 892-897
- PubMed: 11158566 
- DOI: 10.1073/pnas.98.3.892
- Primary Citation of Related Structures:  
1HQM - PubMed Abstract: 
Bacterial DNA-dependent RNA polymerase (RNAP) has subunit composition beta'betaalpha(I)alpha(II)omega. The role of omega has been unclear. We show that omega is homologous in sequence and structure to RPB6, an essential subunit shared in eukaryotic RNAP I, II, and III ...