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RanBPM (RanBP9) regulates mouse c-Kit receptor level and is essential for normal development of bone marrow progenitor cells.
Date
2016-12-20
Author
Puverel, S
Kiriş, Erkan
Singh, S
Klarmann, KD
Coppola, V
Keller, JR
Tessarollo, L
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c-Kit is a tyrosine kinase receptor important for gametogenesis, hematopoiesis, melanogenesis and mast cell biology. Dysregulation of c-Kit function is oncogenic and its expression in the stem cell niche of a number of tissues has underlined its relevance for regenerative medicine and hematopoietic stem cell biology. Yet, very little is known about the mechanisms that control c-Kit protein levels. Here we show that the RanBPM/RanBP9 scaffold protein binds to c-Kit and is necessary for normal c-Kit protein expression in the mouse testis and subset lineages of the hematopoietic system. RanBPM deletion causes a reduction in c-Kit protein but not its mRNA suggesting a posttranslational mechanism. This regulation is specific to the c-Kit receptor since RanBPM reduction does not affect other membrane proteins examined. Importantly, in both mouse hematopoietic system and testis, RanBPM deficiency causes defects consistent with c-Kit loss of expression suggesting that RanBPM is an important regulator of c-Kit function. The finding that this regulatory mechanism is also present in human cells expressing endogenous RanBPM and c-Kit suggests a potential new strategy to target oncogenic c-Kit in malignancies
Subject Keywords
Oncology
URI
https://hdl.handle.net/11511/36547
Journal
Oncotarget
DOI
https://doi.org/10.18632/oncotarget.13198
Collections
Department of Biology, Article
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S. Puverel et al., “RanBPM (RanBP9) regulates mouse c-Kit receptor level and is essential for normal development of bone marrow progenitor cells.,”
Oncotarget
, pp. 85109–85123, 2016, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/36547.