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Post-transcriptional Regulation of Gcn5, a Putative Regulator of Hox in Mouse Embryonic Fibroblast Cells

 Youra Lee  ;  Ji Hoon Oh  ;  Kyoung-Ah Kong  ;  Myoung Hee Kim 
 Journal of Experimental & Biomedcal Science, Vol.18(2) : 165-168, 2012 
Journal Title
Journal of Experimental & Biomedcal Science(대한의생명과학회지)
Issue Date
Hox genes ; Epigenetic modification ; Akt1 ; Gcn5 ; Protein stability
Hox proteins containing DNA-binding homedomain act as transcription factors important for anteroposterior body patterning during vertebrate embryogenesis. However, the precise mechanisms by which signal pathways are transduced to regulate the Hox gene expression are not clear. In the course of an attempt to isolate an upstream regulatory factor(s) controlling Hox genes, protein kinase B alpha (Akt1) has been identified as a putative regulator of Hox genes through in silico analysis (GEO profile). In the Gene Expression Omnibus (GEO) dataset GDS1784 at the NCBI (National Center for Biotechnology Information) site, Hox genes were differentially expressed depending on the presence or absence of Akt1. Since it was not well known how Akt1 regulates the specific Hox genes, whose transcription was reported to be regulated by epigenetic modifications such as histone acetylation, methylation etc., the expression of Gcn5, a histone acetyltransferase (HAT), was analyzed in wild type (WT) as well as in Akt1-/- mouse embryonic fibroblast (MEF) cells. RT-PCR analysis revealed that the amount of Gcn5 mRNA was similar in both WT and Akt1-/- MEFs. However, the protein level of Gcn5 was significantly increased in Akt1-/- MEF cells. The half life of Gcn5 was 1 hour in wild type whereas 8 hours in Akt1-/- MEF. These data all together, indicate that Gcn5 is post-transcriptionally down-regulated and the protein stability is negatively regulated by Akt1 in MEF cells.
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1. College of Medicine (의과대학) > Dept. of Anatomy (해부학교실) > 1. Journal Papers
Yonsei Authors
Kong, Kyoung Ah(공경아)
Kim, Myoung Hee(김명희) ORCID logo https://orcid.org/0000-0001-5652-1452
Oh, Ji Hoon(오지훈) ORCID logo https://orcid.org/0000-0001-6619-5515
Lee, You Ra(이유라)
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