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RNA editing is being recognized as an important post-transcriptional mechanism that may have crucial roles in introducing genetic variation and phenotypic diversity. Despite microRNA editing recurrence, defining its biological relevance is still under extended debate. To better understand microRNA editing function and regulation we performed an exhaustive characterization of the A-to-I site-specific patterns in mir-376a-1, a mammalian microRNA which RNA editing is involved in the regulation of development and in disease. Thorough an integrative approach based on high-throughput small RNA sequencing, Sanger sequencing and computer simulations we explored mir-376a-1 editing in samples from various individuals and primate species including human placenta and macaque, gorilla, chimpanzee and human brain cortex. We observed that mir-376a-1 editing is a common phenomenon in the mature and primary microRNA molecules and it is more frequently detected in brain than in placenta. Primary mir-376a-1 is edited at three positions, -1, +4 and +44. Editing frequency estimations and in silico simulations indicated that editing was not equally recurrent along the three mir-376a-1 sites, nevertheless no epistatic interactions among them were observed. Particularly, the +4 site, located in the seed region of the mature miR-376a-5p, reached the highest editing frequency in all samples. Secondary structure predictions revealed that the +4 position was the one that conferred the highest stability to the mir-376a-1 hairpin. We suggest that molecular stability might partially explain the editing recurrence observed in certain microRNAs and that editing events conferring new functional regulatory roles in particular tissues and species could have been conserved along evolution, as it might be the case of mir-376a-1 in primate brain cortex.
This article was published in the following journal.
RNA editing generates post-transcriptional sequence alterations. Detection of RNA editing sites (RESs) typically requires the filtering of SNVs called from RNA-seq data using an SNP database, an obsta...
Adenosine (A) to inosine (I) RNA editing is widespread in eukaryotes. In prokaryotes, however, A-to-I RNA editing was only reported to occur in tRNAs but not in protein-coding genes. By comparing DNA ...
RNA editing is a process of post-transcriptional level of gene regulation by nucleotide modification. Previously, the chloroplast DNA of Taiwan endemic moth orchid, P. aphrodite subsp. formosana was d...
Adenosine-to-inosine (A-to-I) editing is hypothesized to facilitate adaptive evolution by expanding proteomic diversity through an epigenetic approach. However, it is challenging to provide evidences ...
Adenosine-to-inosine RNA editing is a conserved process, which is performed by ADAR enzymes. By changing nucleotides in coding regions of genes and altering codons, ADARs expand the cell's protein rep...
The purpose of the study is to evaluate the safety, tolerability and effect on leukocyte and plasma iduronidase (IDUA) enzyme activity of ascending doses of SB-318. SB-318 is an intravenou...
The purpose of the study is to evaluate the safety, tolerability and effect on leukocyte and plasma Iduronate 2-Sulfatase (IDS) enzyme activity of ascending doses of SB-913. SB-913 is an i...
The primary objective of this study is to determine if the use of a bone compaction process (osseodensification) (Densah™ bur: Versah Osseodensification Company™) to prepare dental imp...
Clinical Evaluation Of Dental Implants Stability Placed In Healed Bony Sites Following Over-drilling Compared To Conventional-Drilling Protocol
The overall aim of the study is to investigate the Ponto wide implant considering; initial implant stability, stability over time, skin reaction and long term success when loaded at 3 week...
A process that changes the nucleotide sequence of mRNA from that of the DNA template encoding it. Some major classes of RNA editing are as follows: 1, the conversion of cytosine to uracil in mRNA; 2, the addition of variable number of guanines at pre-determined sites; and 3, the addition and deletion of uracils, templated by guide-RNAs (RNA, GUIDE).
An APOBEC deaminase catalytic subunit of the apolipoprotein B (APOB) MESSENGER RNA (mRNA) editing enzyme complex that is involved in post-transcriptional editing of a CAA codon for GLYCINE to a UAA STOP CODON in the ApoB mRNA. It also functions in CGA (ARGININE) to UGA STOP CODON editing of NEUROFIBROMIN 1 mRNA and EPIGENETIC PROCESSES.
Sequences within RNA that regulate the processing, stability (RNA STABILITY) or translation (TRANSLATION, GENETIC) of RNA.
A region of DNA that is highly polymorphic and is prone to strand breaks, rearrangements or other MUTATIONS because of the nature of its sequence. These regions often harbor palindromic, or repetitive sequences (REPETITIVE SEQUENCES, NUCLEIC ACID). Variability in stability of the DNA sequence is seen at CHROMOSOME FRAGILE SITES.
Local surface sites on antibodies which react with antigen determinant sites on antigens. They are formed from parts of the variable regions of FAB FRAGMENTS.
A microRNA (abbreviated miRNA) is a small non-coding RNA molecule (containing about 22 nucleotides) found in plants, animals, and some viruses. Key findings: miRNA is involved in the normal functioning of eukaryotic cells, so has dysregulation...
Biological therapy involves the use of living organisms, substances derived from living organisms, or laboratory-produced versions of such substances to treat disease. Some biological therapies for cancer use vaccines or bacteria to stimulate the body&rs...