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Maps of histone variant H3.V deposition in Trypanosoma brucei brucei

ABSTRACT: Maps of histone variant H3.V deposition in Trypanosoma brucei brucei

PROVIDER: PRJNA487327 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR7740891_1.fastq.gz	Fastqsanger.gz
	SRR7740891_2.fastq.gz	Fastqsanger.gz
	SRR7740892_1.fastq.gz	Fastqsanger.gz
	SRR7740892_2.fastq.gz	Fastqsanger.gz
	SRR7740893_1.fastq.gz	Fastqsanger.gz

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Maps of histone variant H3.V deposition in Trypanosoma brucei brucei

Project description:Chromatin immunoprecipitation of genomic loci in Trypanosoma brucei where histone variant H3.V is deposited. This was achieved by deletion of one H3.V allele and N-terminal tagging of the second H3.V allele with a Ty1 tag. During the ChIP experiment, the DNA was digested with MNase to obtain mononucleosomes. Nucleosomes containing H3.V were pulled down by using a BB2 anti-Ty1 antibody. Cross links are reversed and mononucleosomal DNA is purified and prepared for Illumina sequencing.

2018-08-24 | GSE118917 | GEO

Maps of histone variant H4.V deposition in Trypanosoma brucei brucei

Project description:Chromatin immunoprecipitation of genomic loci in Trypanosoma brucei where histone variant H4.V is deposited. A previously generated cell line (Siegel et al., 2009) in which both endogenous H4.V alleles are knockout out and ectopic overexpression of a Ty1-tagged version of H4.V can be induced was used. During the ChIP experiment, the DNA was digested with MNase to obtain mononucleosomes. Nucleosomes containing H4.V were pulled down by using a BB2 anti-Ty1 antibody. Cross links are reversed and mononucleosomal DNA is purified and prepared for Illumina sequencing.

2018-08-24 | GSE118938 | GEO

Maps of histone variant H4.V deposition in Trypanosoma brucei brucei

Project description:Maps of histone variant H4.V deposition in Trypanosoma brucei brucei

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Project description:Trypanosoma brucei gambiense is the causative agent of the fatal human disease African sleeping sickness. Using Digital Gene Expression we have compared the transcriptome of a group 1 T.b.gambiense (Eliane) and a T.b.brucei (STIB 247).

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In vitro generation of human high-density-lipoprotein-resistant Trypanosoma brucei brucei

Project description:The host range of African trypanosomes is influenced by innate protective molecules in the blood of primates. A subfraction of human high-density lipoprotein (HDL) containing apolipoprotein A-I, apolipoprotein L-I, and haptoglobin-related protein is toxic to Trypanosoma brucei brucei but not the human sleeping sickness parasite Trypanosoma brucei rhodesiense. It is thought that T. b. rhodesiense evolved from a T. b. brucei-like ancestor and expresses a defense protein that ablates the antitrypanosomal activity of human HDL. To directly investigate this possibility, we developed an in vitro selection to generate human HDL-resistant T. b. brucei. Here we show that conversion of T. b. brucei from human HDL sensitive to resistant correlates with changes in the expression of the variant surface glycoprotein (VSG) and abolished uptake of the cytotoxic human HDLs. Complete transcriptome analysis of the HDL-susceptible and -resistant trypanosomes confirmed that VSG switching had occurred but failed to reveal the expression of other genes specifically associated with human HDL resistance, including the serum resistance-associated gene (SRA) of T. b. rhodesiense. In addition, we found that while the original active expression site was still utilized, expression of three expression site-associated genes (ESAG) was altered in the HDL-resistant trypanosomes. These findings demonstrate that resistance to human HDLs can be acquired by T. b. brucei. Keywords: Trypanosoma, VSG, antigenic switching, HDL-resistance

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