Skip to main content
Main Navigation
800-826-4673
Careers
MyCityOfHope
3E0850CF-0689-4BF5-AD9F-05D356E1C5AA
Locations
Donate
0B246A5F-14F2-472B-AA8F-E70E82ACD21B
Popular Searches
  • How to make an appointment
  • Find my Medical Records
  • Find a Doctor
  • Insurance Information
  • Cancers & Conditions Information
  • Patient Care
  • Research & Innovation
  • Academics & Training
  • Giving
  • About
Search 3E0850CF-0689-4BF5-AD9F-05D356E1C5AA Locations MyCityofHope Careers 800-826-4673 Donate

Yanzhong (Frankie) Yang, M.D., Ph.D.

yyang@coh.org
626-218-9859
Yang-Yanzhong
Associate Professor, Department of Cancer Genetics and Epigenetics
Research Teams
Cancer Genetics and Epigenetics
Molecular and Cellular Biology of Cancer (Comprehensive Cancer Center)
Research Teams
Cancer Genetics and Epigenetics
Molecular and Cellular Biology of Cancer (Comprehensive Cancer Center)
  • Location
  • Research
Location
587062AF-5697-45DD-8BDE-532C2563AF35

Duarte - Main Campus

1500 East Duarte Road
Duarte, CA 91010
(626) 256-4673
Research

Chromatin harbors two of the most important molecular directors of life, genetics and epigenetics, both of which have profound influence on human diseases. My long-term research interest is to understand chromatin dynamics in human diseases. The fundamental nuclear events, such as gene transcription, DNA replication, DNA damage repair, all take place in the context of chromatin. It is critical to understand the factors and mechanisms that regulate DNA and chromatin architecture. Currently, my lab focuses on studying the biological roles of R loops, which are nucleic acid structures formed by a RNA/DNA hybrid and the displacement of the DNA strand. R loops are generated during gene transcription and threat genome stability.

The interplay between genetics and epigenetics has been widely appreciated. In my lab, we particularly focus on one group of epigenetic modifiers, protein arginine methyltransferases, which have been shown to regulate R loop formation and maintain genome stability. We are currently taking advantage of gene knockout and gain-of-function mouse models to study the physiological and pathological impacts of the interaction between DNA structures (R loops) and epigenetic pathways.

Laboratory
Currently, two major projects are carried out in my laboratory:

1. To study the biology of R loops and its interplay with epigenetic pathways

Transcription-mediated R-loop formation occurs when the nascent RNA transcript anneals back to the template DNA strand in the wake of RNAP II. R-loops form there owing to the presence of a negatively supercoiled region behind RNAP II and to the fact that RNA/DNA hybrids, particularly those formed by G-rich RNAs base-paired to C-rich DNA templates, are more stable than double stranded DNA. The biological roles of R loops include 1) initiate double-strand DNA breaks and trigger class switch recombination at the IgH locus; 2) protect from DNA methylation at the 5’-UTR; 3) mediate efficient transcription termination at the 3’-UTR; 4) impede the progression of elongating RNAP II; and 5) cause genomic instability. We focus on studying the factors, and epigenetic pathways, that tightly control the balance between beneficiary and deleterious effects of R loops. We recently found that protein arginine methyltransferases (PRMTs), especially PRMT1 and CARM1, function as transcriptional coactivators in vivo by depositing methyl-marks (H4R3me2a and H3R17me2a) that recruit the TDRD3-TOP3B protein complex to dampen R-loop formation at sites actively undergoing transcription.

2. To investigate the biological roles of protein arginine methyltransferase (PRMTs) using genetically engineered mouse models

Protein arginine methylation is catalyzed by a group of enzymes named protein arginine methyltransferases (PRMTs). There are nine PRMTs encoded in mammalian genomes, the protein products of which catalyze three types of arginine methylation, namely monomethylation, asymmetrical dimethylation and symmetrical dimethylation. PRMTs are involved in every aspect of cellular processes including transcription, pre-RNA splicing, DNA damage repair, etc. Although overexpression of these enzymes is often associated with various cancers, the oncogenic pathways that PRMTs are involved in have not yet been clearly identified. Our research in this direction focuses on studying the regulation of DNA repair pathways by arginine methylation, which is largely uncharacterized. We are using in vitro biochemistry assays, reporter cell lines, gene knockout and gain-of-function mouse models to investigate the roles of PRMTs in DNA damage repair. Through identification of the potential oncogenic pathways, we aim to provide implications for therapeutic strategies. Furthermore, we recently characterized a novel PRMT, PRMT9, which catalyzes symmetrical dimethylation on protein substrates. PRMT9 has clear roles in regulation of alternative splicing. We are currently in the process of generating Prmt9 gene knockout mice to unmask the biological roles of this new enzyme.
City of Hope logo
  • About Us
    • Who We Are
    • Careers
    • Contact Us
    • Diversity & Inclusion
    • Annual Reporting
    • Legal & Privacy Policies
  • Resources
    • Newsroom
    • City Stories
    • Refer a Patient
    • MyCityofHope
  • Explore
    • Patient Care
    • Research & Innovation
    • Academics & Training
    • Giving
    • Who We Are
  • Finding Us
    • Locations
    • Find a Doctor
    • Visiting the Duarte Campus
    • Visiting Orange County
    • Cancercenter.com

Sign Up For News & Updates Subscribe
Connect With Us
U.S. News & World Report - Cancer (footer)
NCI Logo
NCCN Member Institution
ANCC Logo
  • Legal & Privacy Policies
  • Terms & Conditions

© 2023 CITY OF HOPE and the City of Hope logo are registered trademarks of City of Hope.
City of Hope strongly supports and values the uniqueness of all individuals and promotes a work environment where diversity is embraced.