A Conserved Guided Entry of Tail-anchored Pathway is Involved in the Trafficking of a Subset of Membrane Proteins in Plasmodium Falciparum

Overview

Journal PLoS Pathog

Specialty Microbiology

Date 2021 Nov 15

PMID 34780541

Citations 2

Authors

Tarkeshwar Kumar

Satarupa Maitra

Abdur Rahman

Souvik Bhattacharjee

Affiliations

Soon will be listed here.

Abstract

Tail-anchored (TA) proteins are defined by the absence of N-terminus signal sequence and the presence of a single transmembrane domain (TMD) proximal to their C-terminus. They play fundamental roles in cellular processes including vesicular trafficking, protein translocation and quality control. Some of the TA proteins are post-translationally integrated by the Guided Entry of TA (GET) pathway to the cellular membranes; with their N-terminus oriented towards the cytosol and C-terminus facing the organellar lumen. The TA repertoire and the GET machinery have been extensively characterized in the yeast and mammalian systems, however, they remain elusive in the human malaria parasite Plasmodium falciparum. In this study, we bioinformatically predicted a total of 63 TA proteins in the P. falciparum proteome and revealed the association of a subset with the P. falciparum homolog of Get3 (PfGet3). In addition, our proximity labelling studies either definitively identified or shortlisted the other eligible GET constituents, and our in vitro association studies validated associations between PfGet3 and the corresponding homologs of Get4 and Get2 in P. falciparum. Collectively, this study reveals the presence of proteins with hallmark TA signatures and the involvement of evolutionary conserved GET trafficking pathway for their targeted delivery within the parasite.

Citing Articles

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Liu C, Lei L, Zhu J, Chen L, Peng S, Zhang M Int J Mol Sci. 2024; 25(22).

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