[HTML][HTML] Chromatin structure characteristics of pre-miRNA genomic sequences
Background MicroRNAs (miRNAs) are non-coding RNAs with important roles in regulating
gene expression. Recent studies indicate that transcription and cleavage of miRNA are
coupled, and that chromatin structure may influence miRNA transcription. However, little is
known about the relationship between the chromatin structure and cleavage of pre-miRNA
from pri-miRNA. Results By analysis of genome-wide nucleosome positioning data sets from
human and Caenorhabditis elegans (C. elegans), we found an enrichment of positioned …
gene expression. Recent studies indicate that transcription and cleavage of miRNA are
coupled, and that chromatin structure may influence miRNA transcription. However, little is
known about the relationship between the chromatin structure and cleavage of pre-miRNA
from pri-miRNA. Results By analysis of genome-wide nucleosome positioning data sets from
human and Caenorhabditis elegans (C. elegans), we found an enrichment of positioned …
Background
MicroRNAs (miRNAs) are non-coding RNAs with important roles in regulating gene expression. Recent studies indicate that transcription and cleavage of miRNA are coupled, and that chromatin structure may influence miRNA transcription. However, little is known about the relationship between the chromatin structure and cleavage of pre-miRNA from pri-miRNA.
Results
By analysis of genome-wide nucleosome positioning data sets from human and Caenorhabditis elegans (C. elegans), we found an enrichment of positioned nucleosome on pre-miRNA genomic sequences, which is highly correlated with GC content within pre-miRNA. In addition, obvious enrichments of three histone modifications (H2BK5me1, H3K36me3 and H4K20me1) as well as RNA Polymerase II (RNAPII) were observed on pre-miRNA genomic sequences corresponding to the active-promoter miRNAs and expressed miRNAs.
Conclusion
Our results revealed the chromatin structure characteristics of pre-miRNA genomic sequences, and implied potential mechanisms that can recognize these characteristics, thus improving pre-miRNA cleavage.
Springer