RPL39L is an Example of a Recently Evolved Ribosomal Protein Paralog That Shows Highly Specific Tissue Expression Patterns and is Upregulated in ESCs and HCC Tumors

Overview

Journal RNA Biol

Specialty Molecular Biology

Date 2014 Jan 24

PMID 24452241

Citations 35

Authors

Queenie Wing-Lei Wong

Jia Li

Sheng Rong Ng

Seng Gee Lim

Henry Yang

Leah A Vardy

Affiliations

Soon will be listed here.

Abstract

Ribosomal proteins (RPs) have been shown to be able to impart selectivity on the translating ribosome implicating them in gene expression control. Many ribosomal proteins are highly conserved and recently a number of ribosomal protein paralogs have been described in mammals. We examined the expression pattern of RPs in differentiating mouse Embryonic Stem Cells (ESCs), paying particular attention to the RP paralogs. We find the RP paralog Rpl39l is highly expressed in ESC and its expression strongly correlates with hepatocellular carcinoma tumor (HCC) samples with high tumor grading and alpha-fetoprotein level giving it diagnostic potential. We further screen the expression pattern of all RPs and their paralogs across 22 different tissues. We find that the more recently evolved RP paralogs show a much greater level of tissue-specific expression. We propose that these RP paralogs evolved more recently to provide a greater level of gene expression control to higher eukaryotes.

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