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Quantitative Methods to Study Protein Arginine Methyltransferase 1-9 Activity in Cells
Published on: August 7, 2021
Arginine methyltransferase CARM1/PRMT4 regulates endochondral ossification
Tatsuo Ito1, Neelu Yadav, Jaeho Lee
1Department of Molecular and Experimental Medicine, The Scripps Research Institute, La Jolla, CA 92037, USA. itot@mskcc.org
BMC Developmental Biology
|September 4, 2009
Summary
Coactivator-associated arginine methyltransferase 1 (CARM1) regulates chondrocyte proliferation by methylating Sox9. This methylation impacts cartilage development and endochondral ossification during embryogenesis.
Area of Science:
- Skeletal biology
- Molecular mechanisms of gene regulation
Background:
- Chondrogenesis and endochondral ossification are critical developmental processes.
- The transcription factor Sox9 (SRY-related high mobility group-Box gene 9) is a key regulator, but its molecular regulation is not fully understood.
Purpose of the Study:
- To investigate the role of coactivator-associated arginine methyltransferase 1 (CARM1) in chondrogenesis.
- To elucidate the molecular mechanisms by which CARM1 influences chondrocyte proliferation and Sox9 activity.
Main Methods:
- Utilized CARM1-null and transgenic mouse models to study cartilage development.
- Performed in vivo and in vitro experiments to assess CARM1's effect on Sox9.
- Analyzed Sox9 methylation, its interaction with beta-catenin, and downstream effects on Cyclin D1 expression and cell cycle progression.
Main Results:
- CARM1-null mice exhibited delayed endochondral ossification and reduced chondrocyte proliferation.
- CARM1 transgenic mice showed accelerated cartilage development.
- CARM1 was found to specifically methylate Sox9 within its HMG domain.
- Sox9 methylation by CARM1 disrupted its interaction with beta-catenin, affecting Cyclin D1 expression and chondrocyte cell cycle progression.
Conclusions:
- CARM1 plays a significant role in regulating chondrocyte proliferation.
- CARM1-mediated arginine methylation of Sox9 is a key mechanism controlling skeletal development.
- These findings provide novel insights into the molecular regulation of chondrogenesis and endochondral ossification.
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