Cited by 55RNA Research and SplicingRNA regulation and diseaseNuclear Structure and Function

Structure and regulation of the nuclear exosome targeting complex guides RNA substrates to the exosome

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Gerlach, Piotr, Garland, William, Lingaraju, Mahesh, Salerno-Kochan, Anna, Bonneau, Fabien, Basquin, Jérôme, Jensen, Torben Heick, Conti, Elena·2022·Molecular Cell

Abstract

In mammalian cells, spurious transcription results in a vast repertoire of unproductive non-coding RNAs, whose deleterious accumulation is prevented by rapid decay. The nuclear exosome targeting (NEXT) complex plays a central role in directing non-functional transcripts to exosome-mediated degradation, but the structural and molecular mechanisms remain enigmatic. Here, we elucidated the architecture of the human NEXT complex, showing that it exists as a dimer of MTR4-ZCCHC8-RBM7 heterotrimers. Dimerization preconfigures the major MTR4-binding region of ZCCHC8 and arranges the two MTR4 helicases opposite to each other, with each protomer able to function on many types of RNAs. In the inactive state of the complex, the 3' end of an RNA substrate is enclosed in the MTR4 helicase channel by a ZCCHC8 C-terminal gatekeeping domain. The architecture of a NEXT-exosome assembly points to the molecular and regulatory mechanisms with which the NEXT complex guides RNA substrates to the exosome.

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Crossref · 10.1016/j.molcel.2022.04.011

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  • Catalytic activities of the RNA exosome are mediated by associated 3'−5' exonucleases EXOSC10 and DIS3 or accessory factors such as MTR4, while core components including EXOSC3 provide structural stability and facilitate substrate recognition and/or RNA threading.

    “The catalytic activities of the RNA exosome are mediated by associated 3’−5’ exonucleases EXOSC10 and DIS3 or accessory factors such as the RNA helicase MTR4, while core components including EXOSC3 provide structural stability and facilitate substrate recognition and/or RNA threading through the protein complex core39–43.”

    From EXOSC3 G191 Variants Trigger System-Wide Recalibration of RNA Processing Machinery (2026) · cites this paper as [39]

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Authors
Gerlach, P., Garland, W., Lingaraju, M., Salerno-Kochan, A., Bonneau, F., Basquin, J., Jensen, T. H., & Conti, E.
Affiliations
  • Max Planck Society (DE)
  • Aarhus University (DK)
Corresponding author
  • Gerlach, Piotr
  • Conti, Elena
Venue
Molecular Cell
Publisher
Elsevier BV
Published
2022-07
Volume
82
Issue
13
Pages
2505-2518.e7
ISSN
1097-2765 (ISSN-L)
OpenAlex
W4281874261
Cited by
55
References
73
Citations by year
2026: 14 · 2025: 9 · 2024: 21 · 2023: 6 · 2022: 5
FWCI
3.35
Type
journal article
Language
en
Open access
Locations
  • Molecular Cell (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
  • Deutsche Forschungsgemeinschaft (SFB 1035, TRR 237, GRK1721, SFB TRR237)
  • Max-Planck-Gesellschaft
  • Novo Nordisk
  • Novo Nordisk Fonden (NNF18OC0033380)
  • Max-Planck-Institut für Bildungsforschung
  • Medical Research Council
  • H2020 European Research Council (740329)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA Research and Splicing
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA regulation and disease
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Nuclear Structure and Function
Keywords
RBM7, protein complex structure, RNA degradation
MeSH terms
Cell Nucleus, DNA Helicases, Humans, Protein Binding, RNA, RNA Helicases, RNA Stability, DEAD-box RNA Helicases, Exosomes, Exosome Multienzyme Ribonuclease Complex

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