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PP2A dephosphorylates MYPT1(pThr696) and thereby stimulates MP activity inducing dephosphorylation of eNOS(pThr497) and the 20 kDa myosin II light chains.
Study reveals the mechanism controlling abscission through integration of Aurora B kinase and B56-bound PP2A phosphatase activities on the kinesin motor protein MKlp2. MKlp2 is an essential protein for promoting abscission, which may regulate tethering and stabilizing of the PM to the microtubule cytoskeleton at the intercellular bridge through its previously uncharacterized lipid association motif.
These results suggest that loss of specific PP2A regulatory subunits is functionally important in breast tumourigenesis, and support strategies to enhance PP2A activity as a therapeutic approach in breast cancer.
High expression of PP2A is associated with cisplatin resistant gastric cancer.
Study identifies Eya3 as a regulator of PP2A, a major cellular Ser/Thr phosphatase, and uncovers a mechanism of controlling the stability of a critical oncogene, c-Myc.
Authors demonstrated CFTR and PP2AA interact in the cytosol, resulting in PP2A complex inactivation and increased degradation of PP2A substrates via the lysosomal/proteasome pathway.
Together, the results suggest a complex antagonistic interplay between the control of ARPP-16 by MAST3 and PKA that creates a mechanism whereby cAMP mediates PP2A disinhibition.
An imbalanced regulation in protein kinases and protein phosphatases is the direct cause of tau hyperphosphorylation in Alzheimer's disease; GSK-3beta and PP2A are the most implicated. (Review)
Isoliensinine suppresses NF-kappaB in hepatocellular carcinoma cells through impairing PP2A/I2PP2A interaction and stimulating PP2A-dependent p65 dephosphorylation at Ser536
BIR domain of XIAP activated the protein phosphatase 2 (PP2A) activity by decreasing the phosphorylation of PP2A at Tyr307 in its catalytic subunit, PP2A-C. Such activated PP2A prevented the deviant phosphorylation and activation of MAPK kinases/MAPKs, their downstream effector c-Jun; and in turn inhibiting transcription of c-Jun-regulated miR-200a
T-type channel signaling is redirected towards the activation of the kinase Akt1, leading to increased expression of the anti-apoptotic protein survivin, and a decrease in the pro-apoptotic mediator FoxO3A. Finally, in iPAH cells, Akt1 is no longer able to regulate caspase 9 activation, whereas T-type channel overexpression reverses PP2A defect in iPAH cells but reinforces the deleterious effects of Akt1 activation
The present results indicate that rs959627 predicts PPP2R2 B mRNA prefrontal expression in two independent post-mortem datasets as well as lateral prefrontal activity during working memory in healthy subjects and suggest that genetic modulation of signal transduction mediated by PP2A affects complex biological phenotypes of relevance for cognitive behavior.
the present study suggested that PP2A has an important role in regulating mast cell beta2-adrenoceptors
The results of this study demonstrated that HBx of hepatitis B virus impairs interferon signaling via increased expression of SOCS3 and PP2A.
The current study describes a novel pathogenic mechanism of action for human polyomavirus 6 small tumor (sT) antigen which involves binding to protein phosphatase 2A (PP2A) via its WFG motif and zinc binding sites for activation of PP2A's downstream oncogenic pathways (MEK/ERK/c-Jun).
The aim of this review is to shed light on the role of four different phosphatases (PTEN, PP2A, CDC25 and DUSP1) in five different solid tumors (breast cancer, lung cancer, pancreatic cancer, prostate cancer and ovarian cancer), in order to better understand the most frequent and aggressive primary cancer of the central nervous system, glioblastoma.
Oncoprotein CIP2A is stabilized via interaction with tumor suppressor PP2A/B56
Such effect by miR-429 was again abolished with AMPKalpha1 silence or mutation. Together, we propose that PP2A-c silence by miR-429 activates AMPK and protects osteoblastic cells from Dex.
PTPalpha is identified as a novel substrate of N-Acetylglucosaminyltransferase V (GnT-V) and could be a factor regulating promotion of migration in breast cancer cells
This article reviews the involvement of PP2A in the regulation of three cell signaling pathways: wnt, mTOR and MAP kinase, as well as the G1-->S transition, DNA synthesis and mitotic initiation. These processes are all crucial for proper cell survival and proliferation and are often deregulated in cancer and other diseases. [review]
results suggested that PPFIA1 functioned with PP2A to promote the dephosphorylation of Kif7, triggering Kif7 localization to the tips of primary cilia and promoting Gli transcriptional activity.
Protein phosphatase 2A is one of the four major Ser/Thr phosphatases and is implicated in the negative control of cell growth and division. Protein phosphatase 2A holoenzymes are heterotrimeric proteins composed of a structural subunit A, a catalytic subunit C, and a regulatory subunit B. The regulatory subunit is encoded by a diverse set of genes that have been grouped into the B/PR55, B'/PR61, and B''/PR72 families. These different regulatory subunits confer distinct enzymatic specificities and intracellular localizations to the holozenzyme. The product of this gene belongs to the B' family. This gene encodes a specific phosphotyrosyl phosphatase activator of the dimeric form of protein phosphatase 2A. Alternative splicing results in multiple transcript variants encoding different isoforms.
PP2A phosphatase activator
, PP2A subunit B' isoform PR53
, phosphotyrosyl phosphatase activator
, protein phosphatase 2A, regulatory subunit B' (PR 53)
, serine/threonine-protein phosphatase 2A activator
, serine/threonine-protein phosphatase 2A regulatory subunit B'
, PP2A, subunit B', PR53 isoform
, serine/threonine-protein phosphatase 2A regulatory subunit 4
, protein tyrosine phosphatase, receptor type, A
, protein phosphatase 2 regulatory subunit 4
, protein phosphatase 2A activator, regulatory subunit 4
, protein phosphatase 2A regulatory subunit 4
, protein phosphatase 2A, regulatory subunit B (PR 53)
, protein phosphatase 2 phosphatase activator L homeolog
, protein phosphatase 2A regulatory subunit 4 L homeolog