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Translationally controlled tumor protein (TCTP) is a multifunctional protein implicated in various types of cellular processes involving growth and development of an organism. Here, we identified  tctp  gene in  Dictyostelium discoideum  and unraveled its function. The sequence analysis of  D. discoideum  TCTP ( Dd TCTP) showed its conservation among eukaryotes. Transcript of  Dd TCTP was highly expressed at the initial time points of development and protein is localized both in the cytoplasm and nucleus. Disruption of  tctp  was achieved by BSR cassette using double homologous recombination method. Abrogation of  tctp  resulted in reduced cell proliferation but increased cell size. Additionally, development was delayed by 4 h wherein small-sized aggregates and fruiting bodies were produced by  tctp  –  cells while larger aggregates and fruiting bodies were produced by  tctp   OE   cells concordant with the fact that TCTP regulates prestalk/prespore ratio and cell-type differentiation.  tctp  –  cells produced round spores with reduced viability and stalk cells are arranged in septate pattern as compared to polyhedral manner of wild type. Abrogation of  tctp  resulted in aberrant localization of cell type specific markers and show low proclivity toward prespore/spore region, in presence of wild type cells.

Investigating the Role of Translationally Control Tumor Protein in Growth, Development and Differentiation of Dictyostelium discoideum