Linked Life Data

18246121

Source:http://linkedlifedata.com/resource/pubmed/id/18246121

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
27
pubmed:dateCreated
2008-6-19
pubmed:abstractText
Acute promyelocytic leukemia is associated with chromosomal translocations that involve the RARalpha gene and several distinct loci producing a variety of fusion proteins. One such fusion partner is promyelocytic leukemia zinc-finger gene (PLZF), a member of the POK (POZ and Krüppel) family of transcriptional repressors that is a key developmental regulator, stem cell maintenance factor and tumor suppressor. Overexpression of PLZF has been shown to induce cell cycle arrest at the G(1) to S transition and repress the expression of key pro-proliferative genes such as CCNA2 and MYC. However, given this data suggesting an important growth inhibitory role for PLZF, relatively little is known regarding regulation of its activity. Here we show that the main cyclin-dependent kinase involved at the G(1) to S transition (CDK2) phosphorylates PLZF at two consensus sites found within PEST domains present in the hinge region of the protein. This phosphorylation triggers the ubiquitination and subsequent degradation of PLZF, which impairs PLZF transcriptional repression ability and antagonizes its growth inhibitory effects. This critical mechanism of PLZF regulation may thus be relevant for cell cycle progression during the development and the pathogenesis of human cancer.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jun
pubmed:issn
1476-5594
pubmed:author
pubmed:issnType
Electronic
pubmed:day
19
pubmed:volume
27
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
3789-96
pubmed:dateRevised
2009-11-19
pubmed:meshHeading
pubmed:year
2008
pubmed:articleTitle
Cyclin-dependent kinase antagonizes promyelocytic leukemia zinc-finger through phosphorylation.
pubmed:affiliation
Cancer Biology and Genetics Program, Department of Pathology, Sloan-Kettering Institute, Memorial Sloan-Kettering Cancer Center, New York, NY, USA.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't, Research Support, N.I.H., Extramural