Project description:To identify the substrates of METTL5, we used crosslinking-assisted immunoprecipitation of overexpressed, FLAG-METTL5 followed by high throughput sequencing.
Project description:We present here a photo-crosslinking-assisted m6A sequencing strategy to more accurately define sites with m6A modifications. Using this strategy, we obtained a high-resolution map of m6A in a human transcriptome. The map resembles the general distribution pattern observed previously, and reveals new m6A sites at base resolution. Our results provide insights into the relationship between the methylation regions and the binding sites of RNA-binding proteins.
Project description:METTL5 is an RNA methyltransferase whose stability was noted to be poor when expressed in both mammalian and bacterial expression systems. To determine if METTL5 has an endogenous stabilizing binding partner, FLAG-tagged METTL5 was expressed in Freestyle 293 cells and pulled down with anti-FLAG-M2 antibody-coupled magnetic beads. Bound proteins were fractionated by SDS-PAGE, and bands of interest were cut out for proteomics analysis.
Project description:The methyltransferase-like5 (METTL5), which catalyzes m6A in 18S rRNA at position A1832, has been shown to regulate the efficient of mRNA translation in the differentiation of ES cell and the growth of cancer cells. It remains unknown that whether and how METTL5 regulates cardiac hypertrophy. In this study, we generated a mouse model (METTL5-cKO) with cardiac-specific abolishment of METTL5 in vivo. Loss function of METTL5 promotes pressure overload-induced cardiomyocyte hypertrophy and adverse remodeling. The regulatory function of METTL5 in hypertrophic growth of cardiomyocyte were further confirmed with both gain- and loss-of-function approaches in primary isolated cardiomyocytes. Mechanically, METTL5 was identified to modulate the mRNA translation of SUZ12, a core component of PRC2 complex, and further regulate the transcriptome shift during cardiac hypertrophy. Therefore, our study uncover an important translational regulator of cardiac hypertrophy.