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A genome-wide screen for non-template nucleotides and isomiR repertoires in miRNAs indicates dynamic and versatile microRNAome

miRNA variants (termed isomiRs) have been reported as potential functional molecules that may affect miRNA stability or target selection. The aims of the present study were to comprehensively survey and characterize non-template nucleotides (NTNs) and isomiR repertoires in miRNAs. Over 50 % of the N... Full description

Journal Title: Molecular Biology Reports 2014, Vol.41(10), pp.6649-6658
Main Author: Guo, Li
Other Authors: Zhao, Yang , Yang, Sheng , Zhang, Hui , Chen, Feng
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: ISSN: 0301-4851 ; E-ISSN: 1573-4978 ; DOI: 10.1007/s11033-014-3548-0
Link: http://dx.doi.org/10.1007/s11033-014-3548-0
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recordid: springer_jour10.1007/s11033-014-3548-0
title: A genome-wide screen for non-template nucleotides and isomiR repertoires in miRNAs indicates dynamic and versatile microRNAome
format: Article
creator:
  • Guo, Li
  • Zhao, Yang
  • Yang, Sheng
  • Zhang, Hui
  • Chen, Feng
subjects:
  • microRNA (miRNA)
  • Non-template nucleotide (NTN)
  • IsomiRs
  • IsomiR repertoires
ispartof: Molecular Biology Reports, 2014, Vol.41(10), pp.6649-6658
description: miRNA variants (termed isomiRs) have been reported as potential functional molecules that may affect miRNA stability or target selection. The aims of the present study were to comprehensively survey and characterize non-template nucleotides (NTNs) and isomiR repertoires in miRNAs. Over 50 % of the NTNs were located in the 3′ ends (also termed 3′ additions), followed by the 5′ ends and adjacent positions to 5′ and 3′ ends. The similar distributions of NTNs and isomiR repertoires might be detected between homologous or clustered miRNAs. miRNA might be stably expressed based on the typical analysis, but its isomiRs might be strongly up- or down-regulated. IsomiRs with novel seed sequences were mainly derived from “seed shifting” events in 5′ isomiRs, NTNs in 5′ ends or in seed sequences. IsomiRs from a miRNA locus or homologous miRNA loci maybe have the same seed sequences, but they would have various enrichment levels and 3′ ends. Interestingly, isomiR species with novel seed sequences via NTNs in the seed region were always stably expressed. These novel seed sequences could lead to novel functional roles through driving the potential novel target mRNAs. Integrated predicted target mRNAs and further microarray validation showed that these isomiRs have versatile biological roles. Collectively, multiple isomiR products and miRNA maturation processes provide opportunities to perform versatile roles in the regulatory network, which further enriches and complicates the regulation of biological processes.
language: eng
source:
identifier: ISSN: 0301-4851 ; E-ISSN: 1573-4978 ; DOI: 10.1007/s11033-014-3548-0
fulltext: fulltext
issn:
  • 1573-4978
  • 15734978
  • 0301-4851
  • 03014851
url: Link


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titleA genome-wide screen for non-template nucleotides and isomiR repertoires in miRNAs indicates dynamic and versatile microRNAome
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subjectmicroRNA (miRNA) ; Non-template nucleotide (NTN) ; IsomiRs ; IsomiR repertoires
descriptionmiRNA variants (termed isomiRs) have been reported as potential functional molecules that may affect miRNA stability or target selection. The aims of the present study were to comprehensively survey and characterize non-template nucleotides (NTNs) and isomiR repertoires in miRNAs. Over 50 % of the NTNs were located in the 3′ ends (also termed 3′ additions), followed by the 5′ ends and adjacent positions to 5′ and 3′ ends. The similar distributions of NTNs and isomiR repertoires might be detected between homologous or clustered miRNAs. miRNA might be stably expressed based on the typical analysis, but its isomiRs might be strongly up- or down-regulated. IsomiRs with novel seed sequences were mainly derived from “seed shifting” events in 5′ isomiRs, NTNs in 5′ ends or in seed sequences. IsomiRs from a miRNA locus or homologous miRNA loci maybe have the same seed sequences, but they would have various enrichment levels and 3′ ends. Interestingly, isomiR species with novel seed sequences via NTNs in the seed region were always stably expressed. These novel seed sequences could lead to novel functional roles through driving the potential novel target mRNAs. Integrated predicted target mRNAs and further microarray validation showed that these isomiRs have versatile biological roles. Collectively, multiple isomiR products and miRNA maturation processes provide opportunities to perform versatile roles in the regulatory network, which further enriches and complicates the regulation of biological processes.
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abstractmiRNA variants (termed isomiRs) have been reported as potential functional molecules that may affect miRNA stability or target selection. The aims of the present study were to comprehensively survey and characterize non-template nucleotides (NTNs) and isomiR repertoires in miRNAs. Over 50 % of the NTNs were located in the 3′ ends (also termed 3′ additions), followed by the 5′ ends and adjacent positions to 5′ and 3′ ends. The similar distributions of NTNs and isomiR repertoires might be detected between homologous or clustered miRNAs. miRNA might be stably expressed based on the typical analysis, but its isomiRs might be strongly up- or down-regulated. IsomiRs with novel seed sequences were mainly derived from “seed shifting” events in 5′ isomiRs, NTNs in 5′ ends or in seed sequences. IsomiRs from a miRNA locus or homologous miRNA loci maybe have the same seed sequences, but they would have various enrichment levels and 3′ ends. Interestingly, isomiR species with novel seed sequences via NTNs in the seed region were always stably expressed. These novel seed sequences could lead to novel functional roles through driving the potential novel target mRNAs. Integrated predicted target mRNAs and further microarray validation showed that these isomiRs have versatile biological roles. Collectively, multiple isomiR products and miRNA maturation processes provide opportunities to perform versatile roles in the regulatory network, which further enriches and complicates the regulation of biological processes.
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doi10.1007/s11033-014-3548-0
pages6649-6658
date2014-10