» Articles » PMID: 32469313

Translational Machinery Condones Polyadenosine Repeats

Overview
Journal Elife
Specialty Biology
Date 2020 May 30
PMID 32469313
Citations 11
Authors
Affiliations
Soon will be listed here.
Abstract

is a causative agent of human malaria. Sixty percent of mRNAs from its extremely AT-rich (81%) genome harbor long polyadenosine (polyA) runs within their ORFs, distinguishing the parasite from its hosts and other sequenced organisms. Recent studies indicate polyA runs cause ribosome stalling and frameshifting, triggering mRNA surveillance pathways and attenuating protein synthesis. Here, we show that is an exception to this rule. We demonstrate that both endogenous genes and reporter sequences containing long polyA runs are efficiently and accurately translated in cells. We show that polyA runs do not elicit any response from No Go Decay (NGD) or result in the production of frameshifted proteins. This is in stark contrast to what we observe in human cells or , an organism with similar AT-content. Finally, using stalling reporters we show that cells evolved not to have a fully functional NGD pathway.

Citing Articles

Girolline is a sequence context-selective modulator of eIF5A activity.

Schneider-Poetsch T, Dang Y, Iwasaki W, Arata M, Shichino Y, Al Mourabit A Nat Commun. 2025; 16(1):223.

PMID: 39794322 PMC: 11724050. DOI: 10.1038/s41467-024-54838-2.


Poly-basic peptides and polymers as new drug candidates against Plasmodium falciparum.

Sivakumar R, Floyd K, Erath J, Jacoby A, Kim J, Bayguinov P Malar J. 2024; 23(1):227.

PMID: 39090669 PMC: 11295857. DOI: 10.1186/s12936-024-05056-0.


Detection of Developmental Asexual Stage-Specific RNA Editing Events in 3D7 Malaria Parasite.

Azad M, Sugi T, Qulsum U, Kato K Microorganisms. 2024; 12(1).

PMID: 38257964 PMC: 10819399. DOI: 10.3390/microorganisms12010137.


The Giardia lamblia ribosome structure reveals divergence in several biological pathways and the mode of emetine function.

Eiler D, Wimberly B, Bilodeau D, Taliaferro J, Reigan P, Rissland O Structure. 2024; 32(4):400-410.e4.

PMID: 38242118 PMC: 10997490. DOI: 10.1016/j.str.2023.12.015.


Epitranscriptomics in parasitic protists: Role of RNA chemical modifications in posttranscriptional gene regulation.

Catacalos C, Krohannon A, Somalraju S, Meyer K, Janga S, Chakrabarti K PLoS Pathog. 2022; 18(12):e1010972.

PMID: 36548245 PMC: 9778586. DOI: 10.1371/journal.ppat.1010972.


References
1.
Lacsina J, LaMonte G, Nicchitta C, Chi J . Polysome profiling of the malaria parasite Plasmodium falciparum. Mol Biochem Parasitol. 2011; 179(1):42-6. PMC: 3135974. DOI: 10.1016/j.molbiopara.2011.05.003. View

2.
Faure G, Ogurtsov A, Shabalina S, Koonin E . Role of mRNA structure in the control of protein folding. Nucleic Acids Res. 2016; 44(22):10898-10911. PMC: 5159526. DOI: 10.1093/nar/gkw671. View

3.
Zhang M, Wang C, Otto T, Oberstaller J, Liao X, Adapa S . Uncovering the essential genes of the human malaria parasite by saturation mutagenesis. Science. 2018; 360(6388). PMC: 6360947. DOI: 10.1126/science.aap7847. View

4.
Trager W, Jensen J . Human malaria parasites in continuous culture. 1976. J Parasitol. 2005; 91(3):484-6. DOI: 10.1645/0022-3395(2005)091[0484:HMPICC]2.0.CO;2. View

5.
Szadeczky-Kardoss I, Gal L, Auber A, Taller J, Silhavy D . The No-go decay system degrades plant mRNAs that contain a long A-stretch in the coding region. Plant Sci. 2018; 275:19-27. DOI: 10.1016/j.plantsci.2018.07.008. View