Characterization of a phosphoinositide-binding protein containing a PHOX homology domain in the malaria parasite Plasmodium falciparum.

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F25%3A00640804" target="_blank" >RIV/60077344:_____/25:00640804 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1038/s41598-025-20974-y" target="_blank" >https://doi.org/10.1038/s41598-025-20974-y</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1038/s41598-025-20974-y" target="_blank" >10.1038/s41598-025-20974-y</a>

Result language

angličtina

Original language name

Characterization of a phosphoinositide-binding protein containing a PHOX homology domain in the malaria parasite Plasmodium falciparum.

Original language description

Phosphoinositides (PIPs), are key regulators of membrane identity and vesicular trafficking. By dynamically shaping the lipid composition of intracellular membranes, PIPs help ensure the specificity of cargo delivery. In apicomplexan parasites such as Plasmodium falciparum, the biogenesis of the specialized secretory organelles involved in erythrocyte invasion (named rhoptries, micronemes, and dense granules), remains poorly understood, particularly regarding how proteins are sorted and specifically targeted to their respective destinations. Our hypothesis is that PIPs might play a role in this process. We here present our characterization of the P. falciparum protein Pf3D7_0704400, a putative PIP-binding protein containing a PX domain. We named this protein PfPX2, following the previously characterized PX domain-containing protein PfPX1. In silico structural analysis revealed that the PfPX2 PX domain contains both canonical and non-canonical PIP-binding motifs and a positively charged binding pocket. Lipid binding assays showed that the PfPX2 PX domain can bind all species of PIPs with a preference for PI3P, PI5P and PI(3,5)P2. Immunofluorescence assays demonstrated that PfPX2 localized to the Golgi apparatus and the micronemes in developing schizonts. Moreover, proximity labelling enabled the identification of protein such as PfSortilin, the clathrin heavy chain and PfDyn1 as potential interactors of PfPX2. Globally, these data suggest that PfPX2 is a PIP-binding protein potentially implicated in vesicular trafficking between the Golgi apparatus and the micronemes. Our bioinformatics analyses identified PX2 orthologues across apicomplexans and indeed other alveolates, raising the possibility that this protein plays a role in a broad range of medically, agriculturally, and environmentally relevant organisms.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10606 - Microbiology

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Scientific Reports

ISSN

2045-2322

e-ISSN

2045-2322

Volume of the periodical

15

Issue of the periodical within the volume

1

Country of publishing house

GB - UNITED KINGDOM

Number of pages

16

Pages from-to

36867

UT code for WoS article

001600057700021

EID of the result in the Scopus database

2-s2.0-105019736979