ArticleMolecular and cellular biology2019
Nuclear Phosphatidylinositol 5-Phosphatase Is Essential for Allelic Exclusion of Variant Surface Glycoprotein Genes in Trypanosomes.
Article in Molecular and cellular biology, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
16 citing papers in PubMed, 25 citations in OpenAlex.
- Article
- Enzyme Assays for Phosphoinositide Kinases and Phosphatases and Inhibitor Screens.Methods in molecular biology (Clifton, N.J.) · 2026Article
- Chromosome compartment assembly is essential for subtelomeric gene silencing in trypanosomes.Nature communications · 2025Article
- Unwrap RAP1's Mystery at Kinetoplastid Telomeres.Biomolecules · 2024Review
- Identifying Antigenic Switching by Clonal Cell Barcoding and Nanopore Sequencing inBio-protocol · 2023Article
- Article
- Knockout of protein phosphatase 1 in Leishmania major reveals its role during RNA polymerase II transcription termination.Nucleic acids research · 2023Article
- Genetic and immunological basis of human African trypanosomiasis.Current opinion in immunology · 2021Review
- A nuclear enterprise: zooming in on nuclear organization and gene expression control in the African trypanosome.Parasitology · 2021Review
- Regulation of Antigenic Variation byPathogens (Basel, Switzerland) · 2021Review
- TbTRF suppresses the TERRA level and regulates the cell cycle-dependent TERRA foci number with a TERRA binding activity in its C-terminal Myb domain.Nucleic acids research · 2021Article
- TheFrontiers in cellular and infection microbiology · 2021Article
- The phosphoinositide regulatory network in Trypanosoma brucei: Implications for cell-wide regulation in eukaryotes.PLoS neglected tropical diseases · 2020Review
- Telomere and Subtelomere R-loops and Antigenic Variation in Trypanosomes.Journal of molecular biology · 2020Review
- Phosphoinositide signaling and regulation in Trypanosoma brucei: Specialized functions in a protozoan pathogen.PLoS pathogens · 2020Review
- Escaping the immune system by DNA repair and recombination in African trypanosomes.Open biology · 2019Review
Corrections and comments
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Authors and funding
3 authors at 1 institution in 1 country.
Funding
Abstract
Allelic exclusion of variant surface glycoprotein (VSG) genes is essential for African trypanosomes to evade the host antibody response by antigenic variation. The mechanisms by which this parasite expresses only one of its ∼2,000 VSG genes at a time are unknown. We show that nuclear phosphatidylinositol 5-phosphatase (PIP5Pase) interacts with repressor activator protein 1 (RAP1) in a multiprotein complex and functions in the control of VSG allelic exclusion. RAP1 binds PIP5Pase substrate phosphatidylinositol 3,4,5-trisphosphate [PI(3,4,5)P3], and catalytic mutation of PIP5Pase that inhibits PI(3,4,5)P3 dephosphorylation results in simultaneous transcription of VSGs from all telomeric expression sites (ESs) and from silent subtelomeric VSG arrays. PIP5Pase and RAP1 bind to telomeric ESs, especially at 70-bp repeats and telomeres, and their binding is altered by PIP5Pase inactivation or knockdown, implying changes in ES chromatin organization. Our data suggest a model whereby PIP5Pase controls PI(3,4,5)P3 binding by RAP1 and, thus, RAP1 silencing of telomeric and subtelomeric VSG genes. Hence, allelic exclusion of VSG genes may entail control of nuclear phosphoinositides.
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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.