» Articles » PMID: 38820160

Ribonuclease Inhibitor and Angiogenin System Regulates Cell Type-specific Global Translation

Abstract

Translation of mRNAs is a fundamental process that occurs in all cell types of multicellular organisms. Conventionally, it has been considered a default step in gene expression, lacking specific regulation. However, recent studies have documented that certain mRNAs exhibit cell type-specific translation. Despite this, it remains unclear whether global translation is controlled in a cell type-specific manner. By using human cell lines and mouse models, we found that deletion of the ribosome-associated protein ribonuclease inhibitor 1 (RNH1) decreases global translation selectively in hematopoietic-origin cells but not in the non-hematopoietic-origin cells. RNH1-mediated cell type-specific translation is mechanistically linked to angiogenin-induced ribosomal biogenesis. Collectively, this study unravels the existence of cell type-specific global translation regulators and highlights the complex translation regulation in vertebrates.

References
1.
Ruggero D . Translational control in cancer etiology. Cold Spring Harb Perspect Biol. 2012; 5(2). PMC: 3552512. DOI: 10.1101/cshperspect.a012336. View

2.
Dickson K, Haigis M, Raines R . Ribonuclease inhibitor: structure and function. Prog Nucleic Acid Res Mol Biol. 2005; 80:349-74. PMC: 2811166. DOI: 10.1016/S0079-6603(05)80009-1. View

3.
Tsuji T, Sun Y, Kishimoto K, Olson K, Liu S, Hirukawa S . Angiogenin is translocated to the nucleus of HeLa cells and is involved in ribosomal RNA transcription and cell proliferation. Cancer Res. 2005; 65(4):1352-60. DOI: 10.1158/0008-5472.CAN-04-2058. View

4.
Chennupati V, Veiga D, Maslowski K, Andina N, Tardivel A, Yu E . Ribonuclease inhibitor 1 regulates erythropoiesis by controlling GATA1 translation. J Clin Invest. 2018; 128(4):1597-1614. PMC: 5873846. DOI: 10.1172/JCI94956. View

5.
Xue S, Barna M . Specialized ribosomes: a new frontier in gene regulation and organismal biology. Nat Rev Mol Cell Biol. 2012; 13(6):355-69. PMC: 4039366. DOI: 10.1038/nrm3359. View