ArticleMolecular biology and evolution2019
Proteomic Analysis of Histones H2A/H2B and Variant Hv1 in Tetrahymena thermophila Reveals an Ancient Network of Chaperones.
Article in Molecular biology and evolution, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.
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Who cites it
13 citing papers in PubMed, 20 citations in OpenAlex.
- The nucleosome assembly protein Nap1 regulates chromatin stability and nuclear division in Tetrahymena thermophila.Science China. Life sciences · 2026Article
- Bromodomain protein IBD1 bridges histone acetylation and H2A.Z deposition to fine-tune transcription.Nucleic acids research · 2026Article
- Bromodomain proteins IBD1 and IBD2 link histone acetylation to SWR1- and INO80-mediated H2A.Z regulation in Tetrahymena.Epigenetics & chromatin · 2025Article
- Bromodomain-containing proteins in the unicellular eukaryoteZoological research · 2025Review
- Multilevel interrogation of H3.3 reveals a primordial role in transcription regulation.Epigenetics & chromatin · 2023Article
- Functional characterization of RebL1 highlights the evolutionary conservation of oncogenic activities of the RBBP4/7 orthologue in Tetrahymena thermophila.Nucleic acids research · 2021Article
- Functional proteomics protocol for the identification of interaction partners inSTAR protocols · 2021Article
- Phosphoglycerate kinase: structural aspects and functions, with special emphasis on the enzyme from Kinetoplastea.Open biology · 2020Review
- The Paramecium histone chaperone Spt16-1 is required for Pgm endonuclease function in programmed genome rearrangements.PLoS genetics · 2020Article
- Nucleus-specific linker histones Hho1 and Mlh1 form distinct protein interactions during growth, starvation and development in Tetrahymena thermophila.Scientific reports · 2020Article
- Exploring the Histone Acetylation Cycle in the Protozoan ModelFrontiers in cell and developmental biology · 2020Review
- RACS: rapid analysis of ChIP-Seq data for contig based genomes.BMC bioinformatics · 2019Article
- Functional Proteomics of Nuclear Proteins inGenes · 2019Review
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Authors and funding
9 authors at 5 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Epigenetic information, which can be passed on independently of the DNA sequence, is stored in part in the form of histone posttranslational modifications and specific histone variants. Although complexes necessary for deposition have been identified for canonical and variant histones, information regarding the chromatin assembly pathways outside of the Opisthokonts remains limited. Tetrahymena thermophila, a ciliated protozoan, is particularly suitable to study and unravel the chromatin regulatory layers due to its unique physical separation of chromatin states in the form of two distinct nuclei present within the same cell. Using a functional proteomics pipeline, we carried out affinity purification followed by mass spectrometry of endogenously tagged T. thermophila histones H2A, H2B and variant Hv1.We identified a set of interacting proteins shared among the three analyzed histones that includes the FACT-complex, as well as H2A- or Hv1-specific chaperones. We find that putative subunits of T. thermophila versions of SWR- and INO80-complexes, as well as transcription-related histone chaperone Spt6Tt specifically copurify with Hv1. We also identified importin β6 and the T. thermophila ortholog of nucleoplasmin 1 (cNpl1Tt) as H2A-H2B interacting partners. Our results further implicate Poly [ADP-ribose] polymerases in histone metabolism. Molecular evolutionary analysis, reciprocal affinity purification coupled to mass spectrometry experiments, and indirect immunofluorescence studies using endogenously tagged Spt16Tt (FACT-complex subunit), cNpl1Tt, and PARP6Tt underscore the validity of our approach and offer mechanistic insights. Our results reveal a highly conserved regulatory network for H2A (Hv1)-H2B concerning their nuclear import and assembly into chromatin.
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