Abstract:
:Cancer cells are known to adopt aerobic glycolysis in order to fuel tumor growth, but the molecular basis of this metabolic shift remains largely undefined. O-GlcNAcase (OGA) is an enzyme harboring O-linked β-N-acetylglucosamine (O-GlcNAc) hydrolase and cryptic lysine acetyltransferase activities. Here, we report that OGA is upregulated in a wide range of human cancers and drives aerobic glycolysis and tumor growth by inhibiting pyruvate kinase M2 (PKM2). PKM2 is dynamically O-GlcNAcylated in response to changes in glucose availability. Under high glucose conditions, PKM2 is a target of OGA-associated acetyltransferase activity, which facilitates O-GlcNAcylation of PKM2 by O-GlcNAc transferase (OGT). O-GlcNAcylation inhibits PKM2 catalytic activity and thereby promotes aerobic glycolysis and tumor growth. These studies define a causative role for OGA in tumor progression and reveal PKM2 O-GlcNAcylation as a metabolic rheostat that mediates exquisite control of aerobic glycolysis.
journal_name
Oncogenejournal_title
Oncogeneauthors
Singh JP,Qian K,Lee JS,Zhou J,Han X,Zhang B,Ong Q,Ni W,Jiang M,Ruan HB,Li MD,Zhang K,Ding Z,Lee P,Singh K,Wu J,Herzog RI,Kaech S,Wendel HG,Yates JR 3rd,Han W,Sherwin RS,Nie Y,Yang Xdoi
10.1038/s41388-019-0975-3subject
Has Abstractpub_date
2020-01-01 00:00:00pages
560-573issue
3eissn
0950-9232issn
1476-5594pii
10.1038/s41388-019-0975-3journal_volume
39pub_type
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