Histone methylation in the freeze-tolerant wood frog (Rana sylvatica).

J Comp Physiol B

Institute of Biochemistry and Department of Biology, Carleton University, 1125 Colonel By Drive, Ottawa, ON, K1S 5B6, Canada.

Published: January 2018

Freeze-tolerant animals survive sub-zero temperatures and long-term starvation associated with the winter by lowering their metabolic rate using a variety of transcriptional, translational, and post-translational regulatory methods. Histone methylation is one mechanism that is known to regulate gene expression at the transcriptional level. Here, we measured relative protein levels of seven histone methyltransferases (SMYD2, SETD7, ASH2L, RBBP5, SUV39H1, EHMT2, and SET8), four methylated histone H3 residues (H3K4me1, H3K9me3, H3K27me1, and H3K36me2), the methyltransferase activity on H3K4, and methylation of p53 (p53K370me2 and p53K372me1) in the skeletal muscle and liver of the freeze-tolerant wood frog (Rana sylvatica) during the freeze-thaw cycle. Overall, the results reveal a tissue-specific expression of histone methyltransferases and the methylation sites on histone H3 during freezing and thaw. In liver, H3K4me1 significantly decreased during freezing, H3K9me3 remained constant across conditions, H3K27me1 increased only during thaw, and H3K36me2 increased during freezing and then decreased during thaw (p < 0.05, n = 4). In skeletal muscle, H3K4me1 and H3K27me1 both decreased during freezing, whereas H3K9me3 and H3K36me2 were maintained across freezing and thaw (p < 0.05, n = 4). Methylation of p53 was also tissue-specific, where no changes were seen in liver tissue; however, p53 in skeletal muscle was differentially methylated. Overall, these results provide an evidence for the potential role methylation of histones and non-histone proteins play in freezing survival and entrance into a hypometabolic state.

Download full-text PDF

Source
http://dx.doi.org/10.1007/s00360-017-1112-7DOI Listing

Publication Analysis

Top Keywords

histone methylation
8
freeze-tolerant wood
8
wood frog
8
frog rana
8
rana sylvatica
8
histone methyltransferases
8
histone
6
methylation freeze-tolerant
4
sylvatica freeze-tolerant
4
freeze-tolerant animals
4

Similar Publications

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!