Welcome To Website IAS

Hot news
Achievement

Independence Award

- First Rank - Second Rank - Third Rank

Labour Award

- First Rank - Second Rank -Third Rank

National Award

 - Study on food stuff for animal(2005)

 - Study on rice breeding for export and domestic consumption(2005)

VIFOTEC Award

- Hybrid Maize by Single Cross V2002 (2003)

- Tomato Grafting to Manage Ralstonia Disease(2005)

- Cassava variety KM140(2010)

Centres
Website links
Vietnamese calendar
Library
Visitors summary
 Curently online :  7
 Total visitors :  7361491

On the origin and evolutionary consequences of gene body DNA methylation
Sunday, 2016/08/14 | 06:04:56

Adam J. Bewick, Lexiang Ji, Chad E. Niederhuth, Eva-Maria Willing, Brigitte T. Hofmeister, Xiuling Shi, Li Wang, Zefu Lu, Nicholas A. Rohr, Benjamin Hartwig, Christiane Kiefer, Roger B. Deal, Jeremy Schmutz, Jane Grimwood, Hume Stroud, Steven E. Jacobsen, Korbinian Schneeberger, Xiaoyu Zhang, and Robert J. Schmitz

Significance

DNA methylation in plants is found at CG, CHG, and CHH sequence contexts. In plants, CG DNA methylation is enriched in the transcribed regions of many constitutively expressed genes (gene body methylation; gbM) and shows correlations with several chromatin modifications. Contrary to other types of DNA methylation, the evolution and function of gbM are largely unknown. Here we show two independent concomitant losses of the DNA methyltransferase CHROMOMETHYLASE 3 (CMT3) and gbM without the predicted disruption of transcription and of modifications to chromatin. This result suggests that CMT3 is required for the establishment of gbM in actively transcribed genes, and that gbM is dispensable for normal transcription as well as for the composition and modification of plant chromatin.

Abstract

In plants, CG DNA methylation is prevalent in the transcribed regions of many constitutively expressed genes (gene body methylation; gbM), but the origin and function of gbM remain unknown. Here we report the discovery that Eutrema salsugineum has lost gbM from its genome, to our knowledge the first instance for an angiosperm. Of all known DNA methyltransferases, only CHROMOMETHYLASE 3 (CMT3) is missing from E. salsugineum. Identification of an additional angiosperm, Conringia planisiliqua, which independently lost CMT3 and gbM, supports that CMT3 is required for the establishment of gbM. Detailed analyses of gene expression, the histone variant H2A.Z, and various histone modifications in E. salsugineum and in Arabidopsis thaliana epigenetic recombinant inbred lines found no evidence in support of any role for gbM in regulating transcription or affecting the composition and modification of chromatin over evolutionary timescales.

 

See: http://www.pnas.org/content/113/32/9111.full

PNAS August 9 2016; vol.113; no.32: 9111–9116

 

Fig. 2.

Fig. 2. CMT3 is required for CHG DNA methylation and establishment of gbM in angiosperms. (A) Similar to E. salsugineum, loss of CMT3 in C. planisiliqua leads to genome-wide reductions of CHG DNA methylation at a per-site level. Closely related species that possess CMT3 maintain higher per-site CHG DNA methylation compared with C. planisiliqua. (B) The loss of CMT3 also causes the loss of gene body methylation in C. planisiliqua. (C) The loss of CMT3 (–) in E. salsugineum and C. planisiliqua represents two independent events separated by at least 13.5 My; loss of CMT3 in C. planisiliqua and E. salsugineum occurred within the last 27.41 and 40.92 My, respectively (20). However, loss in C. planisiliqua could be more recent, ≤12.27 My (20).

Back      Print      View: 465

[ Other News ]___________________________________________________
  • Auxin depletion from leaf primordia contributes to organ patterning
  • Phytochrome controls alternative splicing to mediate light responses in Arabidopsis
  • Maternal temperature history activates Flowering Locus T in fruits to control progeny dormancy according to time of year
  • Identification and evaluation of quantitative trait loci underlying resistance to multiple HG types of soybean cyst nematode in soybean PI 437655
  • Factor analytic mixed models for the provision of grower information from national crop variety testing programs
  • Exploring the areas of applicability of whole genome prediction methods for Asian rice (Oryza sativa L.)
  • Investigation of terpene diversification across multiple sequenced plant genomes
  • Arabidopsis ribosomal proteins control vacuole trafficking and developmental programs through the regulation of lipid metabolism
  • Effect of the ahas Transgene on Biological Nitrogen Fixation and Yield of Soybean
  • Arabidopsis ROCK1 transports UDP-GlcNAc/UDP-GalNAc and regulates ER protein quality control and cytokinin activity
  • A peripheral endocannabinoid mechanism contributes to glucocorticoid-mediated metabolic syndrome
  • High-Resolution Linkage Map and Chromosome-Scale Genome Assembly for Cassava (Manihot esculenta Crantz) from 10 Populations
  • Analysis of the Transcriptome of Banana Fruit during Ripening
  • Nitric oxide negatively regulates abscisic acid signaling in guard cells by S-nitrosylation of OST1
  • Salt Tolerant Gene in Soybean Identified
  • Climate change decouples oceanic primary and export productivity and organic carbon burial
  • Evolution of the H9N2 influenza genotype that facilitated the genesis of the novel H7N9 virus
  • 5-Hydroxymethylcytosine Is Not Present in Appreciable Quantities in Arabidopsis DNA
  • Fine mapping of the qLOP2 and qPSR2 1 loci associated with chilling stress tolerance of wild rice seedlings
  • Natural diversity in daily rhythms of gene expression contributes to phenotypic variation

 

Designed & Powered by WEBSO CO.,LTD