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Cited by 500

The DOI matches its Crossref record; 8 of the 8 references it cites were found in a registry or an index.

AMPK Facilitates Nuclear Accumulation of Nrf2 by Phosphorylating at Serine 550

Open access
Joo, Min Sung, Kim, Won Dong, Lee, Ki Young, Kim, Ji Hyun, Koo, Ja Hyun, Kim, Sang Geon·2016·Molecular and Cellular Biology

Abstract

Nrf2 (nuclear factor erythroid 2-related factor 2) is an antioxidant transcription factor. AMP-activated protein kinase (AMPK) functions as a central regulator of cell survival in response to stressful stimuli. Nrf2 should be coordinated with the cell survival pathway controlled by AMPK, but so far the mechanistic connections remain undefined. This study investigated the role of AMPK in Nrf2 trafficking and its activity regulation. A subnetwork integrating neighbor molecules suggested direct interaction between AMPK and Nrf2. In cells, AMPK activation caused nuclear accumulation of Nrf2. In the in vitro kinase and peptide competition assays, AMPK phosphorylated Nrf2 at the Ser558 residue (Ser550 in mouse) located in the canonical nuclear export signal. Nrf2 with an S550A mutation failed to be accumulated in the nucleus after AMPK activation. Leptomycin B, a nuclear export inhibitor, did not enhance nuclear accumulation of wild-type Nrf2 (WT-Nrf2) activated by AMPK or a phospho-Ser550-mimetic Nrf2 mutant, corroborating the finding that AMPK facilitated nuclear accumulation of Nrf2, probably by inhibiting nuclear export. Activated glycogen synthase kinase 3β (GSK3β) diminished the basal nuclear level of Myc-S550A-Nrf2. Taking the data collectively, AMPK phosphorylates Nrf2 at the Ser550 residue, which, in conjunction with AMPK-mediated GSK3β inhibition, promotes nuclear accumulation of Nrf2 for antioxidant response element (ARE)-driven gene transactivation.

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Metadata

Authors
Joo, M. S., Kim, W. D., Lee, K. Y., Kim, J. H., Koo, J. H., & Kim, S. G.
Venue
Molecular and Cellular Biology
Published
2016-07-01
Volume
36
Issue
14
Pages
1931-1942
ISSN
  • 0270-7306 (ISSN-L)
  • 1098-5549
OpenAlex
W2346475789
Cited by
500
References
8
FWCI
16.70
Type
journal article
Language
en
Open access
bronze

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