Please use this identifier to cite or link to this item: https://biore.bio.bg.ac.rs/handle/123456789/5177
Title: Tagging of RPS9 as a tool for ribosome purification and identification of ribosome-associated proteins
Authors: Jovanović, Bogdan 
Schubert, Lisa
Poetz, Fabian
Stoecklin, Georg
Keywords: RPS9;Ribosome-associated proteins;Ribosome purification;Streptavidin-binding peptide;Affinity purification
Issue Date: 30-Dec-2020
Rank: M23
Publisher: Serbian Biological Society
Citation: Jovanovic B, Schubert L, Poetz F, Stoecklin G. Tagging of RPS9 as a tool for ribosome purification and identification of ribosome-associated proteins. Arch Biol Sci Belgrade 2021;73(1):47-55. doi: 10.2298/ABS20120557J.
Journal: Archives of Biological Sciences
Abstract: 
Ribosomes, the catalytic machinery required for protein synthesis, are comprised of 4 ribosomal RNAs and
about 80 ribosomal proteins in mammals. Ribosomes further interact with numerous associated factors that regulate their biogenesis and function. As mutations of ribosomal proteins and ribosome-associated proteins cause many diseases, it is important to develop tools by which ribosomes can be purified efficiently and with high specificity. Here, we designed a method to purify ribosomes from human cell lines by C-terminally tagging human RPS9, a protein of the small ribosomal subunit. The tag consists of a flag peptide and a streptavidin-binding peptide (SBP) separated by the tobacco etch virus (TEV) protease cleavage site. We demonstrate that RPS9-Flag-TEV-SBP (FTS) is efficiently incorporated into the ribosome without interfering with regular protein synthesis. Using HeLa-GFP-G3BP1 cells stably expressing RPS9-FTS or, as a negative control, mCherry-FTS, we show that complete ribosomes as well as numerous ribosome-associated proteins are efficiently and specifically purified following pull-down of RPS9-FTS using streptavidin beads. This tool will be helpful for
the characterization of human ribosome heterogeneity, post-translational modifications of ribosomal proteins, and changes in ribosome-associated factors after exposing human cells to different stimuli and conditions.
URI: https://biore.bio.bg.ac.rs/handle/123456789/5177
ISSN: 0354-4664
1821-4339
DOI: 10.2298/ABS20120557J
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