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Arcellinida (Amoebozoa) shell formation: Generation of transcriptomes from Cryptodifflugia during shell formation and optimization of transcriptomes and gene families analysis

Grant number: 17/19388-0
Support type:Scholarships abroad - Research Internship - Master's degree
Effective date (Start): March 01, 2018
Effective date (End): June 30, 2018
Field of knowledge:Biological Sciences - Genetics - Molecular Genetics and Genetics of Microorganisms
Principal researcher:Daniel José Galafasse Lahr
Grantee:Alfredo Leonardo Porfirio de Sousa
Supervisor abroad: Matthew William Brown
Home Institution: Instituto de Biociências (IB). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Research place: Mississippi State University (MSU), United States  
Associated to the scholarship:16/14317-4 - Identification of genes involved in the test formation in Arcella intermedia leavis through transcriptome, BP.MS


Shells (tests) are present in diverse eukaryotic lineages. Testate amoebae are a diverse polyphyletic group inside eukaryotes, comprising only shelled unicellular organisms. Despite the diverse field that studies testate amoebae we lack molecular information relating to testate amoebae's shell origin and evolution. Arcellinida is a monophyleic testate amoeba group inside Amoebozoa, a key lineage to study the origin and evolution of its shell. Here we propose the generation of transcriptomes from Cryptodifflugia operculata (Amoebozoa:Arcellinida) during shell formation and vegetative stage to identify the genes responsible for shell formation. Cryptodifflugia is a basal Arcellinida genus, distantly related to the genus Arcella (the genus that we are currently studying). This will enable us to analyze whether Arcellinids construct shell using deeply conserved shell-forming genes/proteins, species-specific genes/proteins, or both. Additionally, we will optimize our transcriptome analysis pipeline and gene family analysis pipeline. The addition of Cryptodifflugia and the optimization of transcriptome and gene families analysis will enable to shed light on the evolutionary molecular origin and evolution of shell in Arcellinida.

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