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The zinc-finger protein Red1 orchestrates MTREC submodules and binds the Mtl1 helicase arch domain

Author

Listed:
  • Nikolay Dobrev

    (Heidelberg University Biochemistry Center (BZH))

  • Yasar Luqman Ahmed

    (Heidelberg University Biochemistry Center (BZH))

  • Anusree Sivadas

    (The Australian National University)

  • Komal Soni

    (Heidelberg University Biochemistry Center (BZH))

  • Tamás Fischer

    (Heidelberg University Biochemistry Center (BZH)
    The Australian National University)

  • Irmgard Sinning

    (Heidelberg University Biochemistry Center (BZH))

Abstract

Cryptic unstable transcripts (CUTs) are rapidly degraded by the nuclear exosome in a process requiring the RNA helicase Mtr4 and specific adaptor complexes for RNA substrate recognition. The PAXT and MTREC complexes have recently been identified as homologous exosome adaptors in human and fission yeast, respectively. The eleven-subunit MTREC comprises the zinc-finger protein Red1 and the Mtr4 homologue Mtl1. Here, we use yeast two-hybrid and pull-down assays to derive a detailed interaction map. We show that Red1 bridges MTREC submodules and serves as the central scaffold. In the crystal structure of a minimal Mtl1/Red1 complex an unstructured region adjacent to the Red1 zinc-finger domain binds to both the Mtl1 KOW domain and stalk helices. This interaction extends the canonical interface seen in Mtr4-adaptor complexes. In vivo mutational analysis shows that this interface is essential for cell survival. Our results add to Mtr4 versatility and provide mechanistic insights into the MTREC complex.

Suggested Citation

  • Nikolay Dobrev & Yasar Luqman Ahmed & Anusree Sivadas & Komal Soni & Tamás Fischer & Irmgard Sinning, 2021. "The zinc-finger protein Red1 orchestrates MTREC submodules and binds the Mtl1 helicase arch domain," Nature Communications, Nature, vol. 12(1), pages 1-13, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-23565-3
    DOI: 10.1038/s41467-021-23565-3
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    Cited by:

    1. Anne-Emmanuelle Foucher & Leila Touat-Todeschini & Ariadna B. Juarez-Martinez & Auriane Rakitch & Hamida Laroussi & Claire Karczewski & Samira Acajjaoui & Montserrat Soler-López & Stephen Cusack & Cam, 2022. "Structural analysis of Red1 as a conserved scaffold of the RNA-targeting MTREC/PAXT complex," Nature Communications, Nature, vol. 13(1), pages 1-17, December.
    2. Xavier Contreras & David Depierre & Charbel Akkawi & Marina Srbic & Marion Helsmoortel & Maguelone Nogaret & Matthieu LeHars & Kader Salifou & Alexandre Heurteau & Olivier Cuvier & Rosemary Kiernan, 2023. "PAPγ associates with PAXT nuclear exosome to control the abundance of PROMPT ncRNAs," Nature Communications, Nature, vol. 14(1), pages 1-14, December.
    3. Komal Soni & Anusree Sivadas & Attila Horvath & Nikolay Dobrev & Rippei Hayashi & Leo Kiss & Bernd Simon & Klemens Wild & Irmgard Sinning & Tamás Fischer, 2023. "Mechanistic insights into RNA surveillance by the canonical poly(A) polymerase Pla1 of the MTREC complex," Nature Communications, Nature, vol. 14(1), pages 1-20, December.

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