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Codon Usage and Splicing Jointly Influence mRNA Localization.

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TLDR
It is proposed that splicing promotes the nuclear export of AU-rich mRNAs and that codon- and splicing-dependent effects on expression are under evolutionary pressure in the human genome.
Abstract
In the human genome, most genes undergo splicing, and patterns of codon usage are splicing dependent: guanine and cytosine (GC) content is the highest within single-exon genes and within first exons of multi-exon genes. However, the effects of codon usage on gene expression are typically characterized in unspliced model genes. Here, we measured the effects of splicing on expression in a panel of synonymous reporter genes that varied in nucleotide composition. We found that high GC content increased protein yield, mRNA yield, cytoplasmic mRNA localization, and translation of unspliced reporters. Splicing did not affect the expression of GC-rich variants. However, splicing promoted the expression of AT-rich variants by increasing their steady-state protein and mRNA levels, in part through promoting cytoplasmic localization of mRNA. We propose that splicing promotes the nuclear export of AU-rich mRNAs and that codon- and splicing-dependent effects on expression are under evolutionary pressure in the human genome.

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Journal ArticleDOI

Functional Long Non-coding RNAs Evolve from Junk Transcripts.

TL;DR: The weak selection regime that dominates the evolution of most multicellular eukaryotes provides ample material for functional innovation with relatively little adaptation involved.
Journal ArticleDOI

Causes and consequences of purifying selection on SARS-CoV-2.

TL;DR: In this article, it was shown that the SARS-CoV-2 mutation rate is at least 49-67% higher than would be estimated based on the rate of appearance of variants in sampled genomes.
Journal ArticleDOI

Urinary extracellular vesicles: Assessment of pre-analytical variables and development of a quality control with focus on transcriptomic biomarker research

TL;DR: In this paper, the effect of pre-analytical variables and developed means of quality control for uEV isolates to be used in transcriptomic biomarker research was studied and recommended how to store and handle uEV isolate for transcriptomics studies that may help to expedite standardization of the EV biomarker field.
Journal ArticleDOI

De novo birth of functional microproteins in the human lineage

TL;DR: In this paper , the evolutionary origins of human microproteins previously found to have measurable, statistically significant fitness effects were reconstructed by tracing the formation of each ORF and its transcriptional activation.
References
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Journal Article

R: A language and environment for statistical computing.

R Core Team
- 01 Jan 2014 - 
TL;DR: Copyright (©) 1999–2012 R Foundation for Statistical Computing; permission is granted to make and distribute verbatim copies of this manual provided the copyright notice and permission notice are preserved on all copies.
Journal ArticleDOI

Analysis of relative gene expression data using real-time quantitative pcr and the 2(-delta delta c(t)) method

TL;DR: The 2-Delta Delta C(T) method as mentioned in this paper was proposed to analyze the relative changes in gene expression from real-time quantitative PCR experiments, and it has been shown to be useful in the analysis of realtime, quantitative PCR data.
Journal ArticleDOI

Initial sequencing and analysis of the human genome.

Eric S. Lander, +248 more
- 15 Feb 2001 - 
TL;DR: The results of an international collaboration to produce and make freely available a draft sequence of the human genome are reported and an initial analysis is presented, describing some of the insights that can be gleaned from the sequence.
Journal ArticleDOI

The codon Adaptation Index--a measure of directional synonymous codon usage bias, and its potential applications.

TL;DR: A simple, effective measure of synonymous codon usage bias, the Codon Adaptation Index, is detailed, useful for predicting the level of expression of a gene, for assessing the adaptation of viral genes to their hosts, and for making comparisons ofCodon usage in different organisms.
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