In:
PLOS Pathogens, Public Library of Science (PLoS), Vol. 17, No. 1 ( 2021-1-26), p. e1009272-
Kurzfassung:
Trypanosoma cruzi alternates between replicative and nonreplicative life forms, accompanied by a shift in global transcription levels and by changes in the nuclear architecture, the chromatin proteome and histone posttranslational modifications. To gain further insights into the epigenetic regulation that accompanies life form changes, we performed genome-wide high-resolution nucleosome mapping using two T . cruzi life forms (epimastigotes and cellular trypomastigotes). By combining a powerful pipeline that allowed us to faithfully compare nucleosome positioning and occupancy, more than 125 thousand nucleosomes were mapped, and approximately 20% of them differed between replicative and nonreplicative forms. The nonreplicative forms have less dynamic nucleosomes, possibly reflecting their lower global transcription levels and DNA replication arrest. However, dynamic nucleosomes are enriched at nonreplicative regulatory transcription initiation regions and at multigenic family members, which are associated with infective-stage and virulence factors. Strikingly, dynamic nucleosome regions are associated with GO terms related to nuclear division, translation, gene regulation and metabolism and, notably, associated with transcripts with different expression levels among life forms. Finally, the nucleosome landscape reflects the steady-state transcription expression: more abundant genes have a more deeply nucleosome-depleted region at putative 5’ splice sites, likely associated with trans-splicing efficiency. Taken together, our results indicate that chromatin architecture, defined primarily by nucleosome positioning and occupancy, reflects the phenotypic differences found among T . cruzi life forms despite the lack of a canonical transcriptional control context.
Materialart:
Online-Ressource
ISSN:
1553-7374
DOI:
10.1371/journal.ppat.1009272
DOI:
10.1371/journal.ppat.1009272.g001
DOI:
10.1371/journal.ppat.1009272.g002
DOI:
10.1371/journal.ppat.1009272.g003
DOI:
10.1371/journal.ppat.1009272.g004
DOI:
10.1371/journal.ppat.1009272.g005
DOI:
10.1371/journal.ppat.1009272.g006
DOI:
10.1371/journal.ppat.1009272.g007
DOI:
10.1371/journal.ppat.1009272.s001
DOI:
10.1371/journal.ppat.1009272.s002
DOI:
10.1371/journal.ppat.1009272.s003
DOI:
10.1371/journal.ppat.1009272.s004
DOI:
10.1371/journal.ppat.1009272.s005
DOI:
10.1371/journal.ppat.1009272.s006
DOI:
10.1371/journal.ppat.1009272.s007
DOI:
10.1371/journal.ppat.1009272.s008
DOI:
10.1371/journal.ppat.1009272.s009
DOI:
10.1371/journal.ppat.1009272.s010
DOI:
10.1371/journal.ppat.1009272.s011
DOI:
10.1371/journal.ppat.1009272.s012
DOI:
10.1371/journal.ppat.1009272.s013
DOI:
10.1371/journal.ppat.1009272.s014
DOI:
10.1371/journal.ppat.1009272.s015
DOI:
10.1371/journal.ppat.1009272.s016
DOI:
10.1371/journal.ppat.1009272.s017
DOI:
10.1371/journal.ppat.1009272.s018
DOI:
10.1371/journal.ppat.1009272.s019
DOI:
10.1371/journal.ppat.1009272.r001
DOI:
10.1371/journal.ppat.1009272.r002
DOI:
10.1371/journal.ppat.1009272.r003
DOI:
10.1371/journal.ppat.1009272.r004
DOI:
10.1371/journal.ppat.1009272.r005
DOI:
10.1371/journal.ppat.1009272.r006
Sprache:
Englisch
Verlag:
Public Library of Science (PLoS)
Publikationsdatum:
2021
ZDB Id:
2205412-1
