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A disease-linked lncRNA mutation in RNase MRP inhibits ribosome synthesis.

Published version
Peer-reviewed

Type

Article

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Authors

Robertson, Nic 
Wright, David 

Abstract

RMRP encodes a non-coding RNA forming the core of the RNase MRP ribonucleoprotein complex. Mutations cause Cartilage Hair Hypoplasia (CHH), characterized by skeletal abnormalities and impaired T cell activation. Yeast RNase MRP cleaves a specific site in the pre-ribosomal RNA (pre-rRNA) during ribosome synthesis. CRISPR-mediated disruption of RMRP in human cells lines caused growth arrest, with pre-rRNA accumulation. Here, we analyzed disease-relevant primary cells, showing that mutations in RMRP impair mouse T cell activation and delay pre-rRNA processing. Patient-derived human fibroblasts with CHH-linked mutations showed similar pre-rRNA processing delay. Human cells engineered with the most common CHH mutation (70AG in RMRP) show specifically impaired pre-rRNA processing, resulting in reduced mature rRNA and a reduced ratio of cytosolic to mitochondrial ribosomes. Moreover, the 70AG mutation caused a reduction in intact RNase MRP complexes. Together, these results indicate that CHH is a ribosomopathy.

Description

Keywords

Animals, Base Sequence, Cell Proliferation, Cells, Cultured, Endoribonucleases, Fibroblasts, Hair, Hirschsprung Disease, Humans, K562 Cells, Mice, Inbred C57BL, Mice, Knockout, Mutation, Osteochondrodysplasias, Primary Immunodeficiency Diseases, RNA Folding, RNA Precursors, RNA, Long Noncoding, RNA, Ribosomal, Ribosomes, T-Lymphocytes, Mice

Journal Title

Nat Commun

Conference Name

Journal ISSN

2041-1723
2041-1723

Volume Title

13

Publisher

Springer Science and Business Media LLC
Sponsorship
Wellcome Trust (077248, 210101, 203149, 205014, WT205014/Z/16/Z)