Journal
INTEGRATIVE AND COMPARATIVE BIOLOGY
Volume 54, Issue 4, Pages 700-713Publisher
OXFORD UNIV PRESS INC
DOI: 10.1093/icb/icu084
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- Human Frontier Science Program (HFSP)
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PIWI proteins are well known for their roles in the animal germline. They are essential for germline development and maintenance, and together with their binding partners, the piRNAs, they mediate transposon silencing. More recently, PIWI proteins have also been identified in somatic stem cells in diverse animals. The expression of PIWI proteins in these cells could be related to the ability of such cells to contribute to the germline. However, evaluation of stem cell systems across many different animal phyla suggests that PIWI proteins have an ancestral role in somatic stem cells, irrespective of their contribution to the germ cell lineage. Moreover, the data currently available reveal a possible correlation between the differentiation potential of a cell and its PIWI levels.
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