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  1. Article ; Online: tiny-count: a counting tool for hierarchical classification and quantification of small RNA-seq reads with single-nucleotide precision.

    Tate, Alex J / Brown, Kristen C / Montgomery, Taiowa A

    Bioinformatics advances

    2023  Volume 3, Issue 1, Page(s) vbad065

    Abstract: Summary: tiny-count is a highly flexible counting tool that allows for hierarchical classification and quantification of small RNA reads from high-throughput sequencing data. Selection rules can be used to filter reads by 5' nucleotide, length, position ...

    Abstract Summary: tiny-count is a highly flexible counting tool that allows for hierarchical classification and quantification of small RNA reads from high-throughput sequencing data. Selection rules can be used to filter reads by 5' nucleotide, length, position of alignments in relation to reference features, and by the number of mismatches to reference sequences. tiny-count can quantify reads aligned to a genome or directly to small RNA or transcript sequences. With tiny-count, users can quantify a single class of small RNAs or multiple classes in parallel. tiny-count can resolve distinct classes of small RNAs, for example, piRNAs and siRNAs, produced from the same locus. It can distinguish small RNA variants, such as miRNAs and isomiRs, with single-nucleotide precision. tRNA, rRNA, and other RNA fragments can also be quantified. tiny-count can be run alone or as part of tinyRNA, a workflow that provides a basic all-in-one command line-based solution for small RNA-seq data analysis, with documentation and statistics generated at each step for accurate and reproducible results.
    Availability and implementation: tiny-count and other tinyRNA tools are implemented in Python, C++, Cython, and R, and the workflow is coordinated with CWL. tiny-count and tinyRNA are free and open-source software distributed under the GPLv3 license. tiny-count can be installed via Bioconda (https://anaconda.org/bioconda/tiny-count) and both tiny-count and tinyRNA documentation and software downloads are available at https://github.com/MontgomeryLab/tinyRNA. Reference data, including genome and feature information, for certain species can be found at https://www.MontgomeryLab.org.
    Language English
    Publishing date 2023-05-18
    Publishing country England
    Document type Journal Article
    ISSN 2635-0041
    ISSN (online) 2635-0041
    DOI 10.1093/bioadv/vbad065
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Genes silenced down the generations, thanks to tails on messenger RNA.

    Reed, Kailee J / Montgomery, Taiowa A

    Nature

    2020  Volume 582, Issue 7811, Page(s) 191–192

    MeSH term(s) Epigenesis, Genetic ; Epigenomics ; Poly A ; RNA ; RNA, Messenger
    Chemical Substances RNA, Messenger ; Poly A (24937-83-5) ; RNA (63231-63-0)
    Language English
    Publishing date 2020-05-14
    Publishing country England
    Document type News ; Comment
    ZDB-ID 120714-3
    ISSN 1476-4687 ; 0028-0836
    ISSN (online) 1476-4687
    ISSN 0028-0836
    DOI 10.1038/d41586-020-01417-2
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: The long and short of lifespan regulation by Argonautes.

    Brown, Kristen C / Montgomery, Taiowa A

    PLoS genetics

    2018  Volume 14, Issue 6, Page(s) e1007415

    MeSH term(s) Argonaute Proteins ; Longevity
    Chemical Substances Argonaute Proteins
    Language English
    Publishing date 2018-06-21
    Publishing country United States
    Document type Journal Article ; Comment
    ZDB-ID 2186725-2
    ISSN 1553-7404 ; 1553-7390
    ISSN (online) 1553-7404
    ISSN 1553-7390
    DOI 10.1371/journal.pgen.1007415
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: piRNA Rules of Engagement.

    Svendsen, Joshua M / Montgomery, Taiowa A

    Developmental cell

    2018  Volume 44, Issue 6, Page(s) 657–658

    Abstract: piRNAs are known to silence transposable elements, but not all piRNAs match transposon sequences. Recent studies from Shen et al. (2018) and Zhang et al. (2018) identify rules for piRNA target recognition in Caenorhabditis elegans. Permissive pairing ... ...

    Abstract piRNAs are known to silence transposable elements, but not all piRNAs match transposon sequences. Recent studies from Shen et al. (2018) and Zhang et al. (2018) identify rules for piRNA target recognition in Caenorhabditis elegans. Permissive pairing rules allow targeting of essentially all germline mRNAs, while protective mechanisms prevent silencing self-genes.
    MeSH term(s) Animals ; Argonaute Proteins/genetics ; Caenorhabditis elegans/genetics ; Caenorhabditis elegans Proteins/genetics ; DNA Transposable Elements ; Gene Silencing ; Germ Cells ; RNA, Small Interfering
    Chemical Substances Argonaute Proteins ; Caenorhabditis elegans Proteins ; DNA Transposable Elements ; RNA, Small Interfering
    Language English
    Publishing date 2018--26
    Publishing country United States
    Document type Journal Article ; Comment
    ZDB-ID 2054967-2
    ISSN 1878-1551 ; 1534-5807
    ISSN (online) 1878-1551
    ISSN 1534-5807
    DOI 10.1016/j.devcel.2018.03.006
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Imaging translational control by Argonaute with single-molecule resolution in live cells.

    Cialek, Charlotte A / Galindo, Gabriel / Morisaki, Tatsuya / Zhao, Ning / Montgomery, Taiowa A / Stasevich, Timothy J

    Nature communications

    2022  Volume 13, Issue 1, Page(s) 3345

    Abstract: A major challenge to our understanding of translational control has been deconvolving the individual impact specific regulatory factors have on the complex dynamics of mRNA translation. MicroRNAs (miRNAs), for example, guide Argonaute and associated ... ...

    Abstract A major challenge to our understanding of translational control has been deconvolving the individual impact specific regulatory factors have on the complex dynamics of mRNA translation. MicroRNAs (miRNAs), for example, guide Argonaute and associated proteins to target mRNAs, where they direct gene silencing in multiple ways that are not well understood. To better deconvolve these dynamics, we have developed technology to directly visualize and quantify the impact of human Argonaute2 (Ago2) on the translation and subcellular localization of individual reporter mRNAs in living cells. We show that our combined translation and Ago2 tethering sensor reflects endogenous miRNA-mediated gene silencing. Using the sensor, we find that Ago2 association leads to progressive silencing of translation at individual mRNA. Silencing was occasionally interrupted by brief bursts of translational activity and took 3-4 times longer than a single round of translation, consistent with a gradual increase in the inhibition of translation initiation. At later time points, Ago2-tethered mRNAs cluster and coalesce with P-bodies, where a translationally silent state is maintained. These results provide a framework for exploring miRNA-mediated gene regulation in live cells at the single-molecule level. Furthermore, our tethering-based, single-molecule reporter system will likely have wide-ranging application in studying RNA-protein interactions.
    MeSH term(s) Argonaute Proteins/genetics ; Argonaute Proteins/metabolism ; Gene Expression Regulation ; Gene Silencing ; Humans ; MicroRNAs/genetics ; MicroRNAs/metabolism ; RNA, Messenger/genetics ; RNA, Messenger/metabolism
    Chemical Substances Argonaute Proteins ; MicroRNAs ; RNA, Messenger
    Language English
    Publishing date 2022-06-10
    Publishing country England
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 2553671-0
    ISSN 2041-1723 ; 2041-1723
    ISSN (online) 2041-1723
    ISSN 2041-1723
    DOI 10.1038/s41467-022-30976-3
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Transgenerational Inheritance: Perpetuating RNAi.

    Brown, Kristen C / Montgomery, Taiowa A

    Current biology : CB

    2017  Volume 27, Issue 10, Page(s) R383–R385

    Abstract: Reversible changes in gene expression independent of the genetic code can be transmitted from one generation to the next via poorly understood mechanisms. In worms, a histone-modifying enzyme is necessary to keep small RNA-guided transgenerational gene ... ...

    Abstract Reversible changes in gene expression independent of the genetic code can be transmitted from one generation to the next via poorly understood mechanisms. In worms, a histone-modifying enzyme is necessary to keep small RNA-guided transgenerational gene silencing in check.
    Language English
    Publishing date 2017-05-22
    Publishing country England
    Document type Journal Article
    ZDB-ID 1071731-6
    ISSN 1879-0445 ; 0960-9822
    ISSN (online) 1879-0445
    ISSN 0960-9822
    DOI 10.1016/j.cub.2017.03.061
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article: Regulation of Microprocessor assembly and localization via Pasha's WW domain in

    Montgomery, Brooke E / Knittel, Thiago L / Reed, Kailee J / Chong, Madeleine C / Isolehto, Ida J / Cafferty, Erin R / Smith, Margaret J / Sprister, Reese A / Magelky, Colin N / Scherman, Hataichanok / Ketting, Rene F / Montgomery, Taiowa A

    bioRxiv : the preprint server for biology

    2024  

    Abstract: Primary microRNA (pri-miRNA) transcripts are processed by the Microprocessor, a protein complex that includes the ribonuclease Drosha and its RNA binding partner DGCR8/Pasha. We developed a live, whole animal, fluorescence-based sensor that reliably ... ...

    Abstract Primary microRNA (pri-miRNA) transcripts are processed by the Microprocessor, a protein complex that includes the ribonuclease Drosha and its RNA binding partner DGCR8/Pasha. We developed a live, whole animal, fluorescence-based sensor that reliably monitors pri-miRNA processing with high sensitivity in
    Language English
    Publishing date 2024-04-23
    Publishing country United States
    Document type Preprint
    DOI 10.1101/2024.04.23.590772
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Dual roles for piRNAs in promoting and preventing gene silencing in C. elegans.

    Montgomery, Brooke E / Vijayasarathy, Tarah / Marks, Taylor N / Cialek, Charlotte A / Reed, Kailee J / Montgomery, Taiowa A

    Cell reports

    2021  Volume 37, Issue 10, Page(s) 110101

    Abstract: Piwi-interacting RNAs (piRNAs) regulate many biological processes through mechanisms that are not fully understood. In Caenorhabditis elegans, piRNAs intersect the endogenous RNA interference (RNAi) pathway, involving a distinct class of small RNAs ... ...

    Abstract Piwi-interacting RNAs (piRNAs) regulate many biological processes through mechanisms that are not fully understood. In Caenorhabditis elegans, piRNAs intersect the endogenous RNA interference (RNAi) pathway, involving a distinct class of small RNAs called 22G-RNAs, to regulate gene expression in the germline. In the absence of piRNAs, 22G-RNA production from many genes is reduced, pointing to a role for piRNAs in facilitating endogenous RNAi. Here, however, we show that many genes gain, rather than lose, 22G-RNAs in the absence of piRNAs, which is in some instances coincident with RNA silencing. Aberrant 22G-RNA production is somewhat stochastic but once established can occur within a population for at least 50 generations. Thus, piRNAs both promote and suppress 22G-RNA production and gene silencing. rRNAs and histones are hypersusceptible to aberrant silencing, but we do not find evidence that their misexpression is the primary cause of the transgenerational sterility observed in piRNA-defective mutants.
    MeSH term(s) Animals ; Animals, Genetically Modified ; Argonaute Proteins/genetics ; Argonaute Proteins/metabolism ; Caenorhabditis elegans/genetics ; Caenorhabditis elegans/metabolism ; Caenorhabditis elegans Proteins/genetics ; Caenorhabditis elegans Proteins/metabolism ; Histones/genetics ; Histones/metabolism ; Models, Genetic ; Mutation ; RNA Interference ; RNA, Helminth/genetics ; RNA, Helminth/metabolism ; RNA, Ribosomal/genetics ; RNA, Ribosomal/metabolism ; RNA, Small Interfering/genetics ; RNA, Small Interfering/metabolism ; Stochastic Processes ; Transcription, Genetic
    Chemical Substances Argonaute Proteins ; Caenorhabditis elegans Proteins ; Histones ; PRG-1 protein, C elegans ; RNA, Helminth ; RNA, Ribosomal ; RNA, Small Interfering
    Language English
    Publishing date 2021-12-05
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural
    ZDB-ID 2649101-1
    ISSN 2211-1247 ; 2211-1247
    ISSN (online) 2211-1247
    ISSN 2211-1247
    DOI 10.1016/j.celrep.2021.110101
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: MicroRNAs visit the ER.

    Montgomery, Taiowa A / Ruvkun, Gary

    Cell

    2013  Volume 153, Issue 3, Page(s) 511–512

    Abstract: Little is known about where microRNAs (miRNAs) regulate their targets within the cell. In this issue, Li et al. identify a new player in the plant miRNA pathway that implicates the endoplasmic reticulum in miRNA-mediated gene silencing. ...

    Abstract Little is known about where microRNAs (miRNAs) regulate their targets within the cell. In this issue, Li et al. identify a new player in the plant miRNA pathway that implicates the endoplasmic reticulum in miRNA-mediated gene silencing.
    Language English
    Publishing date 2013-04-25
    Publishing country United States
    Document type Comment ; Journal Article
    ZDB-ID 187009-9
    ISSN 1097-4172 ; 0092-8674
    ISSN (online) 1097-4172
    ISSN 0092-8674
    DOI 10.1016/j.cell.2013.04.014
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: ALG-5 is a miRNA-associated Argonaute required for proper developmental timing in the Caenorhabditis elegans germline.

    Brown, Kristen C / Svendsen, Joshua M / Tucci, Rachel M / Montgomery, Brooke E / Montgomery, Taiowa A

    Nucleic acids research

    2017  Volume 45, Issue 15, Page(s) 9093–9107

    Abstract: Caenorhabditis elegans contains 25 Argonautes, of which, ALG-1 and ALG-2 are known to primarily interact with miRNAs. ALG-5 belongs to the AGO subfamily of Argonautes that includes ALG-1 and ALG-2, but its role in small RNA pathways is unknown. We ... ...

    Abstract Caenorhabditis elegans contains 25 Argonautes, of which, ALG-1 and ALG-2 are known to primarily interact with miRNAs. ALG-5 belongs to the AGO subfamily of Argonautes that includes ALG-1 and ALG-2, but its role in small RNA pathways is unknown. We analyzed by high-throughput sequencing the small RNAs associated with ALG-5, ALG-1 and ALG-2, as well as changes in mRNA expression in alg-5, alg-1 and alg-2 mutants. We show that ALG-5 defines a distinct branch of the miRNA pathway affecting the expression of genes involved in immunity, defense, and development. In contrast to ALG-1 and ALG-2, which associate with most miRNAs and have general roles throughout development, ALG-5 interacts with only a small subset of miRNAs and is specifically expressed in the germline where it localizes alongside the piRNA and siRNA machinery at P granules. alg-5 is required for optimal fertility and mutations in alg-5 lead to a precocious transition from spermatogenesis to oogenesis. Our results provide a near-comprehensive analysis of miRNA-Argonaute interactions in C. elegans and reveal a new role for miRNAs in the germline.
    MeSH term(s) Animals ; Argonaute Proteins/genetics ; Argonaute Proteins/metabolism ; Caenorhabditis elegans/classification ; Caenorhabditis elegans/genetics ; Caenorhabditis elegans/growth & development ; Caenorhabditis elegans/metabolism ; Caenorhabditis elegans Proteins/genetics ; Caenorhabditis elegans Proteins/metabolism ; Gene Expression Regulation, Developmental ; Germ Cells/growth & development ; Germ Cells/metabolism ; Hermaphroditic Organisms/genetics ; Hermaphroditic Organisms/growth & development ; Hermaphroditic Organisms/metabolism ; High-Throughput Nucleotide Sequencing ; MicroRNAs/genetics ; MicroRNAs/metabolism ; Mutation ; Oogenesis/genetics ; Phylogeny ; Protein Isoforms/genetics ; Protein Isoforms/metabolism ; RNA, Helminth/genetics ; RNA, Helminth/metabolism ; RNA, Messenger/genetics ; RNA, Messenger/metabolism ; RNA, Small Interfering/genetics ; RNA, Small Interfering/metabolism ; RNA-Binding Proteins/genetics ; RNA-Binding Proteins/metabolism ; Spermatogenesis/genetics
    Chemical Substances ALG-1 protein, C elegans ; ALG-2 protein, C elegans ; ALG-5 protein, C elegans ; Argonaute Proteins ; Caenorhabditis elegans Proteins ; MicroRNAs ; Protein Isoforms ; RNA, Helminth ; RNA, Messenger ; RNA, Small Interfering ; RNA-Binding Proteins
    Language English
    Publishing date 2017-09-06
    Publishing country England
    Document type Journal Article
    ZDB-ID 186809-3
    ISSN 1362-4962 ; 1362-4954 ; 0301-5610 ; 0305-1048
    ISSN (online) 1362-4962 ; 1362-4954
    ISSN 0301-5610 ; 0305-1048
    DOI 10.1093/nar/gkx536
    Database MEDical Literature Analysis and Retrieval System OnLINE

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