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A Genome-wide CRISPR Screen in Toxoplasma Identifies Essential Apicomplexan Genes

Open access
Sidik, Saima M., Huet, Diego, Ganesan, Suresh M., Huynh, My-Hang, Wang, Tim, Nasamu, Armiyaw S., Thiru, Prathapan, Saeij, Jeroen P.J., Carruthers, Vern B., Niles, Jacquin C., Lourido, Sebastian·2016·Cell

Abstract

SUMMARY Apicomplexan parasites are leading causes of human and livestock diseases—like malaria and toxoplasmosis—yet most of their genes remain uncharacterized. Here, we present the first genome-wide genetic screen of an apicomplexan. We adapted CRISPR/Cas9 to assess the contribution of each gene from the human parasite Toxoplasma gondii during infection of fibroblasts. Our analysis defines ~200 previously uncharacterized, fitness-conferring genes unique to the phylum, from which 16 were investigated, revealing essential functions during infection of human cells. Secondary screens identify as an invasion factor the claudin-like apicomplexan microneme protein (CLAMP), which resembles mammalian tight-junction proteins and localizes to secretory organelles, making it critical to the initiation of infection. CLAMP is present throughout sequenced apicomplexan genomes, and is essential during the asexual stages of the malaria parasite Plasmodium falciparum. These results provide broad-based functional information on T. gondii genes and will facilitate future approaches to expand the horizon of antiparasitic interventions.

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Metadata

Authors
Sidik, S. M., Huet, D., Ganesan, S. M., Huynh, M.-H., Wang, T., Nasamu, A. S., Thiru, P., Saeij, J. P. J., Carruthers, V. B., Niles, J. C., & Lourido, S.
Venue
Cell
Publisher
Elsevier BV
Published
2016-09
Volume
166
Issue
6
Pages
1423-1435.e12
ISSN
0092-8674 (ISSN-L)
OpenAlex
W2511428910
Cited by
804
References
8
FWCI
60.62
Type
journal article
Language
en
Open access
bronze

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CoChat. (2026). Citation check: A Genome-wide CRISPR Screen in Toxoplasma Identifies Essential Apicomplexan Genes. https://app.cochat.ai/papers/10.1016/j.cell.2016.08.019
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Sidik, S. M., Huet, D., Ganesan, S. M., Huynh, M.-H., Wang, T., Nasamu, A. S., Thiru, P., Saeij, J. P. J., Carruthers, V. B., Niles, J. C., & Lourido, S. (2016). A Genome-wide CRISPR Screen in Toxoplasma Identifies Essential Apicomplexan Genes. Cell. https://doi.org/10.1016/j.cell.2016.08.019

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

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