Dynamic association of the H3K64 trimethylation mark with genes encoding exported proteins in Plasmodium falciparum.

Journal of Biological Chemistry  09 April 2021 | doi.org/10.1016/j.jbc.2021.100614 

Jabeena CA, Govindaraju G, Rawat M, Gopi S, Devadathan VS, Jaleel A, Dhakshmi S, Karmodiya K, Rajavelu A

ABSTRACT

Epigenetic modifications have emerged as critical regulators of virulence genes and stage-specific gene expression in Plasmodium falciparum. However, the specific roles of histone core epigenetic modifications in regulating the stage-specific gene expression are not well understood. In this study, we report an unconventional trimethylation at lysine 64 on histone 3 (H3K64me3) and characterize its functional relevance in P. falciparum. We show that PfSET4 and PfSET5 proteins of P. falciparum methylate H3K64 and that they prefer the nucleosome as a substrate over free histone 3 proteins. Structural analysis of PfSET5 revealed that it interacts with the nucleosome as a dimer. The H3K64me3 mark is dynamic, being enriched in the ring and trophozoite stages and drastically reduced in schizont stages. Stage-specific global ChIP-sequencing analysis of the H3K64me3 mark revealed the selective enrichment of this methyl mark on the genes of exported family proteins in the ring and trophozoite stages, and a significant reduction of the same in the schizont stages. Collectively, our data identify a novel epigenetic mark that are associated with the subset of genes encoding for exported proteins which may regulate their expression in different stages of P. falciparum.

Contact

Rajiv Gandhi Centre for Biotechnology (RGCB),
Thycaud Post, Poojappura,
Thiruvananthapuram - 695 014, Kerala, India
+91-471-2529400 | 2347975 | 2348753
+91-471-2348096
webmaster@rgcb.res.in

My Gov www.mygov.in Prime Ministers National Relife Fund India Gov www.india.gov.in Make In India www.makeinindia.gov.in Make In India www.iredibleindia.org Data gov in www.data.gov.in www.pib.gov.in

Last Updated on: May 14, 2021
CERT-In Certified Website