BCL-2 family protein BOK is a positive regulator of uridine metabolism in mammals
Details
Publication Year 2019-07-16, Volume 116, Issue #31, Page 15469-15474
Journal Title
Proceedings of the National Academy of Sciences of the United States of America
Publication Type
Journal Article
Abstract
BCL-2 family proteins regulate the mitochondrial apoptotic pathway. BOK, a multidomain BCL-2 family protein, is generally believed to be an adaptor protein similar to BAK and BAX, regulating the mitochondrial permeability transition during apoptosis. Here we report that BOK is a positive regulator of a key enzyme involved in uridine biosynthesis; namely, uridine monophosphate synthetase (UMPS). Our data suggest that BOK expression enhances UMPS activity, cell proliferation, and chemosensitivity. Genetic deletion of Bok results in chemoresistance to 5-fluorouracil (5-FU) in different cell lines and in mice. Conversely, cancer cells and primary tissues that acquire resistance to 5-FU down-regulate BOK expression. Furthermore, we also provide evidence for a role for BOK in nucleotide metabolism and cell cycle regulation. Our results have implications in developing BOK as a biomarker for 5-FU resistance and have the potential for the development of BOK-mimetics for sensitizing 5-FU-resistant cancers.
Publisher
NAS
WEHI Research Division(s)
Blood Cells And Blood Cancer; Infectious Diseases And Immune Defence
PubMed ID
31311867
Rights Notice
Refer to copyright notice on published article.


Creation Date: 2019-07-26 09:44:17
Last Modified: 2019-08-23 02:21:54
An error has occurred. This application may no longer respond until reloaded. Reload 🗙