Complexes Within Complexes

Science's STKE  23 Apr 2002:
Vol. 2002, Issue 129, pp. tw148
DOI: 10.1126/stke.2002.129.tw148

When a cellular protein is no longer needed, a proteasomal complex is often used to degrade the unneeded protein. However, proteasomal subunits are now known to be active in nuclear excision repair and transcription elongation. Gonzalez et al. (see the Perspective by Ottosen et al.) use biochemical and genetic analyses to demonstrate that the transcriptional activator Gal4 recruits the 19S, but not the 20S, proteasome particle to a target gene.

F. Gonzalez, A. Delahodde, T. Kodadek, S. A. Johnston, Recruitment of a 19S proteasome subcomplex to an activated promoter. Science 296, 548-550 (2002). [Abstract] [Full Text]

S. Ottosen, F. J. Herrera, S. J. Triezenberg, Proteasome parts at gene promoters. Science 296, 479-481 (2002). [Summary] [Full Text]