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RelA/NF-kappaB transcription factor associates with alpha-actinin-4.

Abstract：

:The NF-kappaB/RelA family of transcription factors regulates inducible transcription of a large number of genes in response to diverse stimuli. Little is known, however, about the location of NF-kappaB in the cytoplasm and the transport mechanism to the nucleus. We found that NF-kappaB is associated with the actin-binding protein alpha-actinin-4. NF-kappaB and alpha-actinin-4 co-localized along actin stress fibers and in membrane lamellae in A431 cells. After a 30-min stimulation with EGF or TNF-alpha, alpha-actinin-4 and p65 were found in the nucleus. Disruption of cytoskeleton by cytochalasin D prior to treatment with TNF-alpha led to increase of p65 nuclear translocation. Antibodies to p65 subunit of NF-kappaB co-immunoprecipitated alpha-actinin-4 from A431 cell lysates and nuclear extracts, but alpha-actinin-1 and beta-actin were not found in the precipitates. Affinity chromatography experiments displayed that p65 and p50 subunits of NF-kappaB can bind to matrix-bound chicken gizzard alpha-actinin. We suggest that the alpha-actinin-4 is important for the NF-kappaB nuclear translocation and its functions inside the nucleus.

journal_name

Exp Cell Res

journal_title

Experimental cell research

authors

Babakov VN,Petukhova OA,Turoverova LV,Kropacheva IV,Tentler DG,Bolshakova AV,Podolskaya EP,Magnusson KE,Pinaev GP

doi

10.1016/j.yexcr.2007.12.001

subject

Has Abstract

pub_date

2008-03-10 00:00:00

pages

1030-8

issue

5

eissn

0014-4827

issn

1090-2422

pii

S0014-4827(07)00575-7

journal_volume

314

pub_type

杂志文章

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