Linked Life Data

10938077

Source:http://linkedlifedata.com/resource/pubmed/id/10938077

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
42
pubmed:dateCreated
2000-11-20
pubmed:abstractText
Nuclear factor kappaB (NF-kappaB)/Rel transcription factors are key regulators of a variety of genes involved in immune and inflammatory responses, growth, differentiation, apoptosis, and development. In unstimulated cells, NF-kappaB/Rel proteins are sequestered in the cytoplasm by IkappaB inhibitor proteins. Many extracellular stimuli, such as tumor necrosis factor alpha (TNFalpha), cause rapid phosphorylation of IkappaB at N-terminal serine residues leading to ubiquitination and degradation of the inhibitor. Subsequently, NF-kappaB proteins translocate to the nucleus and activate gene expression through kappaB response elements. TNFalpha, as well as certain other stimuli, also induces the phosphorylation of the NF-kappaB proteins. Previously, we have shown that TNFalpha induces RelA/p65 phosphorylation at serine 529 and that this inducible phosphorylation increases NF-kappaB transcriptional activity on an exogenously supplied reporter (). In this report, we demonstrate that casein kinase II (CKII) interacts with p65 in vivo and can phosphorylate p65 at serine 529 in vitro. A CKII inhibitor (PD144795) inhibited TNFalpha-induced p65 phosphorylation in vivo. Furthermore, our results indicate that the association between IkappaBalpha and p65 inhibits p65 phosphorylation by CKII and that degradation of IkappaBalpha allows CKII to phosphorylate p65 to increase NF-kappaB transactivation potential. These data may explain the ability of CKII to modulate cell growth and demonstrate a mechanism whereby CKII can function in an inducible manner.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
0021-9258
pubmed:author
pubmed:issnType
Print
pubmed:day
20
pubmed:volume
275
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
32592-7
pubmed:dateRevised
2009-11-19
pubmed:meshHeading
pubmed:year
2000
pubmed:articleTitle
Tumor necrosis factor alpha-induced phosphorylation of RelA/p65 on Ser529 is controlled by casein kinase II.
pubmed:affiliation
Department of Biology, Curriculum in Genetics and Molecular Biology and Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, North Carolina 27599-7295, USA.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't