What does EZH2 do?
The EZH2 gene provides instructions for making a type of enzyme called a histone methyltransferase. Histone methyltransferases modify proteins called histones, which are structural proteins that attach (bind) to DNA and give chromosomes their shape.
How do EZH2 inhibitors work?
EZH2 expression in cancer cells inhibits T-cell activation by suppressing the MHC-I antigen presentation pathway and upregulating PD-L1 expression. Besides cancer cells, EZH2 expression in Treg cells is crucial for maintaining their regulatory phenotype and function, which also results in reduced T-cell activation.
What causes EZH2 mutation?
It is caused by heterozygous mutations in enhancer of zeste homolog 2 (EZH2), a histone methyltransferase responsible for histone H3 at lysine 27 (H3K27) trimethylation.
What is Tazemetostat used for?
Tazemetostat is used to treat epithelioid sarcoma that has spread or grown and cannot be removed by surgery.
What does EZH2 stand for?
Enhancer of zeste homolog 2
Enhancer of zeste homolog 2 (EZH2) is a histone-lysine N-methyltransferase enzyme (EC 2.1. 1.43) encoded by EZH2 gene, that participates in histone methylation and, ultimately, transcriptional repression.
What’s the function of EZH2 in terms of chromatin dynamics?
Biological function of EZH2. PRC2 is an essential chromatin modifier that is conserved across organisms from plants to flies and humans3. This complex represses the transcription of target genes through trimethylation of lysine 27 on histone 3 (H3K27me3), which is currently viewed as its predominant function in vivo4.
WHAT IS SET domain of EZH2?
EZH2 contains a C-terminal SET-domain, a conserved feature of histone lysine methyltransferases [6,7,8].
How do you test for EZH2 mutation?
The doctor takes a small amount of cancerous tissue from the patient and sends it to a laboratory. In the laboratory, DNA is isolated from a patient’s tumor biopsy and mixed with chemical substances (reagents) to evaluate the presence or absence of the specific EZH2 mutations.
What kind of drug is Tazemetostat?
Tazemetostat is in a class of medications called EZH2 inhibitors. It helps to stop the spread of cancer cells.
What are the different inhibitors of EZH2?
Several inhibitors of EZH2 have been developed as of 2015, including 3-deazaneplanocin A (DZNep), EPZ005687, EI1, GSK126, and UNC1999. DZNep has potential antiviral and anti-cancer properties because it lowers EZH2 levels and induces apoptosis in breast and colon cancer cells.
What is the role of EZH2 inhibition in colon cancer treatment?
Katona BW, Liu Y, Ma A, Jin J, Hua X. EZH2 inhibition enhances the efficacy of an EGFR inhibitor in suppressing colon cancer cells. Cancer Biol Ther. 2014;15(12):1677–1687. [ PMC free article] [ PubMed] [ Google Scholar] 100.
The evolutionarily conserved histone modifier enhancer of zeste 2 (EZH2) is aberrantly overexpressed in a number of human cancers.
How is the activity of EZH2 regulated?
Regulation of EZH2 activity. The activity of EZH2 is regulated by the post-translational phosphorylation of threonine and serine residues on EZH2. Specifically, phosphorylation of T350 has been linked to an increase in EZH2 activity while phosphorylation of T492 and S21 have been linked to a decrease in EZH2 activity.