Published online March 17, 2008
doi:10.1083/jcb.200709082
The Journal of Cell Biology, Vol. 180, No. 6, 1061-1064
The Rockefeller University Press, 0021-9525 $30.00
© 2008 Pederson
As functional nuclear actin comes into view, is it globular, filamentous, or both?
Thoru Pederson
Program in Cell Dynamics, Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, MA 01605
Correspondence to Thoru Pederson: thoru.pederson{at}umassmed.edu
The idea that actin may have an important function in the nucleus has undergone a rapid transition from one greeted with skepticism to a now rapidly advancing research field. Actin has now been implicated in transcription by all three RNA polymerases, but the structural form it adopts in these processes remains unclear. Recently, a claim was made that monomeric nuclear actin plays a role in signal transduction, while a just-published study of RNA polymerase I transcription has implicated polymeric actin, consorting with an isoform of its classical partner myosin. Both studies are critically discussed here, and although there are several issues to be resolved, it now seems reasonable to start thinking about functions for both monomeric and assembled actin in the nucleus.

CiteULike
Complore
Connotea
Del.icio.us
Digg
Reddit
Technorati What's this?
This article has been cited by other articles:
-
Dahl, K. N., Ribeiro, A. J.S., Lammerding, J.
(2008). Nuclear Shape, Mechanics, and Mechanotransduction. Circ. Res.
102: 1307-1318
[Abstract]
[Full Text]