Artículo
Specific histone modifications play critical roles in the control of encystation and antigenic variation in the early-branching eukaryote Giardia lamblia
Carranza, Pedro Gabriel
; Gargantini, Pablo Ruben
; Prucca, Cesar German
; Torri, Alessandro
; Saura, Alicia
; Svärd, Staffan; Lujan, Hugo Daniel
Fecha de publicación:
12/2016
Editorial:
Pergamon-Elsevier Science Ltd
Revista:
International Journal Of Biochemistry And Cellular Biology
ISSN:
1357-2725
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
During evolution, parasitic microorganisms have faced the challenges of adapting to different environments to colonize a variety of hosts. Giardia lamblia, a common cause of intestinal disease, has developed fascinating strategies to adapt both outside and inside its host´s intestine, such as trophozoite differentiation into cyst and the switching of its major surface antigens. How gene expression is regulated during these adaptive processes remains undefined. Giardia lacks some typical eukaryotic features, like canonical transcription factors, linker histone H1, and complex promoter regions; suggesting that post-transcriptional and translational control of gene expression is essential for parasite survival. However, epigenetic factors may also play critical roles at the transcriptional level. Here, we describe the most common post-translational histone modifications; characterize enzymes involved in these reactions, and analyze their association with the Giardia´s differentiation processes. We present evidence that NAD+-dependent and NAD+-independent histone deacetylases regulate encystation; however, a unique NAD+-independent histone deacetylase modulate antigenic switching. The rates of acetylation of H4K8 and H4K16 are critical for encystation, whereas a decrease in acetylation of H4K8 and methylation of H3K9 occur preferentially during antigenic variation. These results show the complexity of the mechanisms regulating gene expression in this minimalistic protozoan parasite.
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Articulos(CIDIE)
Articulos de CENTRO DE INV. Y DESARROLLO EN INMUNOLOGIA Y ENFERMEDADES INFECCIOSAS
Articulos de CENTRO DE INV. Y DESARROLLO EN INMUNOLOGIA Y ENFERMEDADES INFECCIOSAS
Articulos(CIQUIBIC)
Articulos de CENTRO DE INVEST.EN QCA.BIOL.DE CORDOBA (P)
Articulos de CENTRO DE INVEST.EN QCA.BIOL.DE CORDOBA (P)
Citación
Carranza, Pedro Gabriel; Gargantini, Pablo Ruben; Prucca, Cesar German; Torri, Alessandro; Saura, Alicia; et al.; Specific histone modifications play critical roles in the control of encystation and antigenic variation in the early-branching eukaryote Giardia lamblia; Pergamon-Elsevier Science Ltd; International Journal Of Biochemistry And Cellular Biology; 81; Part A; 12-2016; 32-43
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