Molecular architecture and assembly of the human RNA Degradosome
Gee, J. A.; Williams, J. G.; Pillon, M. C. · biochemistry · 2026-09-06 · 原文
DOI：10.64898/2026.09.03.749114作者：3 位
The PNPase exoribonuclease interacts with the SUV3 helicase to form the human RNA Degradosome responsible for processive mitochondrial RNA turnover and quality control. Although structural data reveals the trimeric PNPase architecture along with the monomeric and dimeric states of SUV3, the molecular basis of their assembly for processive RNA degradation remains poorly understood. Here we present the molecular characterization of the human RNA Degradosome and define critical molecular features that regulate complex formation. We identify the protein regions required for RNA Degradosome formation and establish the minimum components necessary for the SUV3-PNPase interaction. Chemical crosslinking mass spectrometry analysis reveals distance restraints that position the SUV3 N-terminal domain alongside of the PNPase S1 domain, defining an important interface for complex formation. These findings provide mechanistic insight into how PNPase and SUV3 assemble to form the human RNA Degradosome.
讲义
讲义·推断 依据「原文」自动生成的结构化摘要（推断），非原文表述；以原文为准。
1. 人话版
The PNPase exoribonuclease interacts with the SUV3 helicase to form the human RNA Degradosome responsible for processive mitochondrial RNA turnover and quality control.
Although structural data reveals the trimeric PNPase architecture along with the monomeric and dimeric states of SUV3, the molecular basis of their assembly for processive RNA degradation remains poorly understood.
2. 领域脉络
本文类目：biochemistry，属于其所在研究脉络的最新进展。
3. 机制拆解
Here we present the molecular characterization of the human RNA Degradosome and define critical molecular features that regulate complex formation.
4. 证据与数字
We identify the protein regions required for RNA Degradosome formation and establish the minimum components necessary for the SUV3-PNPase interaction.
Chemical crosslinking mass spectrometry analysis reveals distance restraints that position the SUV3 N-terminal domain alongside of the PNPase S1 domain, defining an important interface for complex formation.
These findings provide mechanistic insight into how PNPase and SUV3 assemble to form the human RNA Degradosome.
5. 反例与边界
摘要未声明局限与反例——这是需要警惕的信号，精读时先问边界。
6. 跨领域连接与意外收获
思考本文机制能否迁移到你正在跟进的问题。
7. 可复用方法
把本文机制与你手头项目对照，找一个两周内能验证的最小实验。
8. 术语表
精读时把不熟的术语记入此处，作为下次回忆的锚点。