A method for purification, identification and validation of DNMT1 mRNA binding proteins.

ABSTRACT: DNA methyltransferase 1 (DNMT1) is the enzyme responsible for the maintenance of DNA methylation patterns during cell division. DNMT1 expression is tightly regulated within the cell cycle. Our previous study showed that the binding of a protein with an apparent size of approximately 40 kDa on DNMT1 3'-UTR triggered the destabilization of DNMT1 mRNA transcript during G(o)/G(1) phase. Using RNA affinity capture with the 3'-UTR of DNMT1 mRNA and matrix-assisted laser desorption-time of flight tandem mass spectrometry (MALDI-TOF-MS-MS) analysis, we isolated and identified AUF 1 (AU-rich element ARE:poly-(U)-binding/degradation factor) as the binding protein. We then validated the role of this protein in the destabilization of DNMT1 mRNA. In this report, we detail the different approaches used

SUBMITTER: Unterberger A 

PROVIDER: S-EPMC2591025 | biostudies-literature | 2008

REPOSITORIES: biostudies-literature