Structural studies on Neurospora RNA polymerases and associated proteins.

Journal Article (Journal Article)

Extensive structural homology between the three nuclear RNA polymerases of Neurospora crassa has been observed by peptide and immunological analyses. Within each polymerase, we found structural similarity between subunits in the 65- to 75-kDa range and one of the two large subunits. We observed also that polymerase II, as isolated, is associated with a 700-kDa complex of 12 polypeptides which is localized in the nucleus. A 75-kDa subunit of the 700-kDa complex was found to be structurally related to the 220-kDa subunit of polymerase II. We suggest, on the basis of the in vitro association, the common nuclear localization and the structural homology, that the 700-kDa complex and polymerase II may be associated in vivo. Evidence is also presented which suggests that polymerase III may interact with chromatin via two of its smallest subunits. A simple procedure for isolating nuclei from Neurospora is described.

Full Text

Duke Authors

Cited Authors

  • Armaleo, D; Gross, SR

Published Date

  • December 1985

Published In

Volume / Issue

  • 260 / 30

Start / End Page

  • 16174 - 16180

PubMed ID

  • 2933407

Electronic International Standard Serial Number (EISSN)

  • 1083-351X

International Standard Serial Number (ISSN)

  • 0021-9258

Digital Object Identifier (DOI)

  • 10.1016/s0021-9258(17)36217-8


  • eng