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Functional dynamics of Orc1b protein: a ChIP-seq analysis

Grant number: 19/04483-2
Support Opportunities:Scholarships abroad - Research Internship - Doctorate
Effective date (Start): May 20, 2019
Effective date (End): July 27, 2019
Field of knowledge:Biological Sciences - Parasitology
Principal Investigator:Maria Carolina Quartim Barbosa Elias Sabbaga
Grantee:Marcela de Oliveira Vitarelli
Supervisor: Nicolai Siegel
Host Institution: Instituto Butantan. Secretaria da Saúde (São Paulo - Estado). São Paulo , SP, Brazil
Research place: Ludwig Maximilian University of Munich (LMU Munich), Germany  
Associated to the scholarship:17/07693-2 - Functional dynamics of Orc1b protein during the life cycle of Trypanosoma, BP.DR


Trypanosoma cruzi is a protozoan which belongs to the Trypanosomatidae family and it is the etiological agent of Chagas disease, a neglected disease that affects millions of people worldwide. This parasite alternates between replicative (epi and amastigotes) and non-replicative (trypomastigotes) forms in its hosts. Therefore, it needs intense control of DNA replication, which involves coordinated action of several proteins. DNA replication starts with the assembly of the pre-replication complex (pre-RC) component ORC onto replication origins, located near the nucleosomes. Followed by the recruitment of other proteins from pre-RC, including Orc1b, whose function is not yet clear. Preliminary data of Marques, et al. (2016) indicates Orc1b participation as a positive regulator in the replication instead of having only a structural role in the ORC complex and preliminary data from our group suggest the binding of Orc1b with the DNA. Thus, we aim to deepen the studies of the Orc1b role in the DNA replication of T. cruzi and its possible interactors. More specifically, this project aims to determine the DNA sequence bound by TcOrc1b by ChIP-seq in order to evaluate the role of this protein in the pre-RC, to be carried out at The Siegel lab in the Biomedical Center Munich (BMC), at the Ludwig-Maximilians-Universität, Munich, Germany. This knowledge will support the development of future antiparasitic strategies and it will also be useful to further understand the biology of these parasites.

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
ROSON, JULIANA NUNES; VITARELLI, MARCELA DE OLIVEIRA J.; COSTA-SILVA, HELLIDA MARINA; PEREIRA, KAMILLE SCHMITT; PIRES, DAVID DA SILVA; LOPES, LETICIA DE SOUSA; CORDEIRO, BARBARA; KRAUS, AMELIE; CRUZ, KARIN NAVARRO TOZZI; CALDERANO, SIMONE GUEDES; et al. 2B.V demarcates divergent strand-switch regions, some tDNA loci, and genome compartments in Trypanosoma cruzi and affects parasite differentiation and host cell invasio. PLOS PATHOGENS, v. 18, n. 2, . (18/15553-9, 16/50050-2, 17/06104-3, 19/04483-2, 19/16033-1, 13/07467-1, 19/19834-5)

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