WITHDRAWN: The Lsm1-7 complex marginally affects unstable mRNA degradation in yeast

The authors have withdrawn their manuscript because additional controls revealed that their initial conclusion regarding the Lsm1-7 complex's role in NMD was based on incorrect assumptions, rendering the RNA sequencing, phenotype, and RT-qPCR results invalid while other findings remain sound.

The Gist

Imagine your cell is a bustling, high-tech factory. Inside this factory, there are blueprints (DNA) that get copied into temporary work orders (mRNA). These work orders tell the machines how to build proteins, which are the workers that keep the factory running.

Sometimes, a work order gets printed with a typo or is just an outdated draft. The factory has a strict "Quality Control" team whose job is to find these bad blueprints and shred them immediately so no one builds defective products. This process is called mRNA degradation.

The Original Story (What the authors thought they found)

The scientists in this paper were investigating a specific "Quality Control" crew called the Lsm1-7 complex. You can think of this crew as a specialized team of inspectors wearing blue vests.

Their initial hypothesis was: "These blue-vested inspectors are the main reason why bad, unstable work orders get shredded. If we take them away, the bad blueprints should pile up everywhere."

They ran their experiments, looked at the data, and wrote a report saying, "Yes, the blue-vested team is definitely involved in cleaning up the mess!"

The Plot Twist (The Withdrawal)

However, after the report was posted online, the scientists realized they made a critical mistake in how they set up their experiment.

Think of it like this: They were trying to test if a specific security guard (Lsm1) was stopping a thief. But they accidentally used a fake thief (a "degron system" that didn't work the way they thought) and didn't check the security cameras properly (missing controls).

Because of this mix-up, their data was misleading. When they re-ran the tests with the correct "thief" and proper "cameras," they found that the blue-vested inspectors (Lsm1-7) actually have very little to do with shredding these specific unstable work orders. The bad blueprints were being destroyed by other teams, not the ones they thought.

The Current Status

The authors have officially withdrawn the paper. They are saying:

• "We were wrong about the main conclusion."
• "The data showing the connection between Lsm1 and this cleanup process is invalid."
• "Please do not use this paper as a reference for your own research."
• "We apologize to anyone who might have built their work on this incorrect idea."

The Bottom Line

In simple terms: The scientists thought they found a key player in the cell's trash-recycling bin, but they realized they were looking at the wrong bin entirely. They are pulling the paper back to prevent other scientists from following a dead end. While some of the background data in the paper is still useful, the main story about how the cell cleans up bad messages is no longer supported by this study.

Technical Summary

Based on the text provided, here is a detailed technical summary of the manuscript. It is important to note that this document is a withdrawn preprint, meaning the scientific conclusions regarding the main hypothesis have been retracted by the authors.

Paper Status: Withdrawn

Title: The Lsm1-7 complex marginally affects unstable mRNA degradation in yeast
Authors: Laurence Decourty, Abdelkader Namane, Guilhem Janbon, Cosmin Saveanu
Institution: Institut Pasteur, Université Paris Cité, CNRS, INSERM
Date Posted: April 6, 2026 (Note: This date appears to be a future-dated placeholder or error in the provided text, as the DOI suggests a 2025 submission).
License: CC-BY-NC 4.0 International

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1. The Problem

The manuscript originally aimed to investigate the role of the Lsm1-7 complex in the degradation of unstable mRNAs in Saccharomyces cerevisiae (yeast). Specifically, the study sought to determine if the Lsm1-7 complex is involved in Nonsense-Mediated Decay (NMD), a critical mRNA surveillance pathway that degrades transcripts containing premature termination codons. The authors initially hypothesized that the Lsm1-7 complex plays a significant role in this process.

2. Methodology

While the full experimental details are not present in the withdrawal notice, the authors utilized the following approaches in their initial study:

• Genetic Manipulation: They likely used yeast strains with specific mutations or deletions in the LSM1 gene or the Lsm1-7 complex components.
• Degron System: The study employed a specific "degron system" (a protein tag that targets a protein for rapid degradation) to manipulate mRNA stability or protein levels.
• Omics and Validation Techniques:
  • RNA Sequencing (RNA-seq): To analyze global changes in transcript abundance.
  • RT-qPCR: To validate specific mRNA levels.
  • Phenotypic Analysis: To observe cellular growth or stress responses associated with the genetic modifications.

3. Key Contributions & Findings (Retracted)

Original Claim: The initial manuscript likely proposed that the Lsm1-7 complex has a marginal or specific effect on unstable mRNA degradation and NMD pathways.

Current Status of Findings:
The authors have withdrawn the manuscript because their initial conclusions were found to be incorrect.

• Root Cause: The authors identified "wrong assumptions" regarding the degron system used and the required controls for the experiment.
• Impact on Data:
  • Invalidated: The RNA sequencing, phenotype, and RT-qPCR results are explicitly stated as "affected" and therefore unreliable. These data points no longer support the involvement of LSM1 in NMD.
  • Validated: The authors state that "other results presented in the manuscript remain valid," though they do not specify which specific data points fall into this category.

4. Significance and Author Statement

The significance of this document lies primarily in its retraction notice rather than its scientific findings, serving as a correction to the scientific record.

• Correction of Misconceptions: The authors explicitly apologize to colleagues who may have based their own work or conclusions on the preprint's initial claims regarding LSM1 and NMD.
• Citation Request: The authors do not wish for this work to be cited as a reference for the project, specifically regarding the invalidated conclusions about NMD.
• Scientific Integrity: This withdrawal highlights the importance of rigorous control validation in degradation studies, particularly when using complex systems like degrons, where assumptions about system behavior can lead to false positives or negatives.

Summary Conclusion

This document is a retraction notice for a study that originally claimed the Lsm1-7 complex affects unstable mRNA degradation in yeast. The authors retracted the paper because flaws in their experimental design (specifically regarding the degron system and controls) invalidated their RNA-seq, phenotype, and RT-qPCR data. Consequently, the conclusion that LSM1 is involved in NMD is false, and the authors request that the preprint not be cited for this purpose.