Cited by 103MicroRNA in disease regulationRNA Interference and Gene DeliveryRNA and protein synthesis mechanisms

mRNA targeting to endoplasmic reticulum precedes ago protein interaction and microRNA (miRNA)-mediated translation repression in mammalian cells

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Barman, Bahnisikha, Bhattacharyya, Suvendra N.·2015·Journal of Biological Chemistry

Abstract

MicroRNA (miRNA) binds to the 3'-UTR of its target mRNAs to repress protein synthesis. Extensive research was done to understand the mechanism of miRNA-mediated repression in animal cells. Considering the progress in understanding the mechanism, information about the subcellular sites of miRNA-mediated repression is surprisingly limited. In this study, using an inducible expression system for an miRNA target message, we have delineated how a target mRNA passes through polysome association and Ago2 interaction steps on rough endoplasmic reticulum (ER) before the miRNA-mediated repression sets in. From this study, de novo formed target mRNA localization to the ER-bound polysomes manifested as the earliest event, which is followed by Ago2 micro-ribonucleoprotein binding, and translation repression of target message. Compartmentalization of this process to rough ER membrane ensures enrichment of miRNA-targeted messages and micro-ribonucleoprotein components on ER upon reaching a steady state.

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  • miRISC and target mRNA localize in multiple subcellular compartments including rough endoplasmic reticulum, P-bodies, stress granules, trans-Golgi network, early/late endosomes, multivesicular bodies, lysosomes, mitochondria, and the nucleus.

    “miRISC and target mRNA have been observed to localize in multiple subcellular compartments including rough endoplasmic reticulum (rER) (70), processing (P)-bodies (71), stress granules (SG) (72), the trans-Golgi network (TGN), early/late endosomes (73), multivesicular bodies (MVB) (74), lysosomes (74), mitochondria (75, 76), and the nucleus (66, 77) (Figure 2).”

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Authors
Barman, B., & Bhattacharyya, S. N.
Affiliations
Indian Institute of Chemical Biology (IN)
Corresponding author
Bhattacharyya, Suvendra N.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2015-10
Volume
290
Issue
41
Pages
24650-24656
ISSN
0021-9258 (ISSN-L)
OpenAlex
W1933173778
Cited by
86
References
23
Citations by year
2026: 7 · 2025: 4 · 2024: 4 · 2023: 11 · 2022: 15 · 2021: 12 · 2020: 8 · 2019: 5 · 2018: 10 · 2017: 5 · 2016: 5
FWCI
2.20
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
Wellcome Trust (WT084324MF)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › MicroRNA in disease regulation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA Interference and Gene Delivery
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA and protein synthesis mechanisms
Keywords
microRNA, mRNA localization, rough endoplasmic reticulum, polysome association, Argonaute 2, 3' untranslated region, subcellular targeting
MeSH terms
RAW 264.7 Cells, Animals, Endoplasmic Reticulum, Humans, Intracellular Membranes, Polyribosomes, Protein Binding, RNA, Messenger, Protein Biosynthesis, Protein Transport, MicroRNAs, Mice, HEK293 Cells, Argonaute Proteins

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