home > bioproject > PRJDB8244
identifier PRJDB8244
type bioproject
organism Oryza sativa Japonica Group
title Study of intronic heterochromatin in the rice genome
description Intronic regions of eukaryotic genomes accumulate a large number of Transposable Elements (TEs). Although TE-bearing introns are widely observed among eukaryotic genomes, their epigenetic states, impacts on gene regulation and function, and their contributions to genetic diversity and evolution, are yet to be fully understood. In this study, we investigated the genome-wide distribution of intronic TEs and their epigenetic states in the Oryza sativa genome. We found that over 10% of the rice genes contain intronic heterochromatin, most of which are associated with TEs and repetitive sequences. These heterochromatic introns are longer and highly enriched in promoter-proximal positions. The genes with heterochromatic intron tend to show tissue-specific expression pattern, and are also implicated in basal functions in developmental processes as well as in responses to environmental stimuli. Furthermore, we found that heterochromatic introns evolve rapidly compared to non-heterochromatic introns. Our study highlights regulatory roles of intronic heterochromatin on gene transcription and its impacts on diversification of genome sequence and gene functions in plants.
data type Epigenomics Transcriptome or Gene Expression
sra-run  DRR177304DRR177305DRR177306DRR177307DRR177308DRR177309DRR177310DRR177311DRR177312DRR177313 More
sra-submission  DRA008322
biosample  SAMD00169513SAMD00169514SAMD00169515SAMD00169516SAMD00169517SAMD00169518SAMD00169519SAMD00169520SAMD00169521SAMD00169522 More
sra-study  DRP005833
sra-sample  DRS122650DRS122651DRS122652DRS122653DRS122654DRS122655DRS122656DRS122657DRS122658DRS122659 More
sra-experiment  DRX167868DRX167869DRX167870DRX167871DRX167872DRX167873DRX167874DRX167875DRX167876DRX167877 More
distribution JSONJSON-LD
status public
visibility unrestricted-access
dateCreated 2019-04-23T23:52:06+0000
dateModified 2020-02-20T13:13:51+0000
datePublished 2020-02-20T13:13:51+0000