The DOI matches its Crossref record; 37 of the 37 references it cites were found in a registry or an index.
Mitogenic Activation, Phosphorylation, and Nuclear Translocation of Protein Kinase Bβ
Open accessAbstract
Protein kinase B (PKB) is a member of the second messenger-dependent family of serine/threonine kinases that has been implicated in signaling pathways downstream of growth factor receptor tyrosine kinases and phosphatidylinositol 3-kinase. Here we report the characterization of the human beta-isoform of PKB (PKBbeta). PKBbeta is ubiquitously expressed in a number of human tissues, with mRNA and protein levels elevated in heart, liver, skeletal muscle, and kidney. After transfection into HEK-293 or COS-1 cells, PKBbeta is activated 2- to 12-fold by mitogens and survival factors. Activation was due to phosphorylation on Thr-309 and Ser-474, which correspond to Thr-308 and Ser-473 implicated in the regulation of PKBalpha. Both phosphorylation and activation were prevented by the phosphatidylinositol 3-kinase inhibitor wortmannin. Moreover, membrane-targeted PKBbeta was constitutively activated when overexpressed in HEK-293 cells. Although the specific activity of PKBbeta was lower than that of PKBalpha toward Crosstide as a substrate (23 nmol/min/mg compared with 178 nmol/min/mg for PKBalpha), both enzymes showed similar substrate specificities. Using confocal microscopy, we show that activation of PKBbeta results in its nuclear translocation within 20 to 30 min after stimulation. These observations provide evidence that PKBbeta undergoes nuclear translocation upon mitogenic activation and support a role for PKB in signaling from receptor tyrosine kinases to the nucleus through phosphatidylinositol 3-kinase.
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“Our data suggest that activation of PKB promotes translocation of PKB to the nucleus (5,6) and phosphorylates Mdm2 in the nuclear compartment.”
From Stabilization of Mdm2 via Decreased Ubiquitination Is Mediated by Protein Kinase B/Akt-dependent Phosphorylation (2004) · cites this paper as [6]
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- Andjelković, 1997, J. Biol. Chem.
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Cellular survival: a play in three Akts
Datta, S. R., Brunet, A., & Greenberg, M. E. (1999) · Genes & Development · doi:10.1101/gad.13.22.2905 · Cited by 4,216
Negative regulation of PKB/Akt-dependent cell survival by the tumor suppressor PTEN
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The PI3K‒PDK1 connection: more than just a road to PKB
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Self-citationThe protein kinase B/Akt signalling pathway in human malignancy
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Metadata
- Authors
- Meier, R., Alessi, D. R., Cron, P., Andjelković, M., & Hemmings, B. A.
- Affiliations
- Friedrich Miescher Institute (CH)
- University of Dundee (GB)
- Corresponding author
- Hemmings, Brian A.
- Venue
- Journal of Biological Chemistry
- Publisher
- Elsevier BV
- Published
- 1997-11
- Volume
- 272
- Issue
- 48
- Pages
- 30491-30497
- ISSN
- 0021-9258 (ISSN-L)
- OpenAlex
- W2112620000
- Semantic Scholar
- 04080b05d4799385077ac3417ff97498cc43a4a4
- Cited by
- 378
- References
- 37
- Citations by year
- 2026: 3 · 2025: 3 · 2024: 8 · 2023: 5 · 2022: 5 · 2021: 1 · 2020: 6 · 2019: 8 · 2017: 2 · 2016: 8 · 2015: 8 · 2014: 8 · 2013: 11 · 2012: 10
- FWCI
- 7.47
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- Locations
- Journal of Biological Chemistry (publishedVersion, cc-by)
- PubMed (publishedVersion)
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › PI3K/AKT/mTOR signaling in cancer
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
- Keywords
- mitogen stimulation, phosphorylation, nuclear translocation, phosphatidylinositol 3-kinase, wortmannin, receptor tyrosine kinase signaling, substrate specificity, growth factor signaling
- MeSH terms
- Amino Acid Sequence, Animals, Biological Transport, Cell Compartmentation, Cell Nucleus, Enzyme Activation, Growth Substances, Humans, Insulin, Insulin-Like Growth Factor I, Mitogens, Molecular Sequence Data, Phosphorylation, Phosphoserine, Phosphothreonine, Proto-Oncogene Proteins, Substrate Specificity, Tissue Distribution, Protein Serine-Threonine Kinases, COS Cells, Phosphatidylinositol 3-Kinases, Proto-Oncogene Proteins c-akt, Rats
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