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Appears in Networks 4

In-Edges 8

path(MESH:"Alzheimer Disease") decreases p(HGNC:LCMT1) View Subject | View Object

Western blot analyses showed a decrease of methyl-PP2A and an increase of demethyl-PP2A with a concomitant reduction in the methyl/demethyl PP2A ratio in both PSP (74%) and AD (76%) brains, associated with an LCMT-1 decrease and a demethylating enzyme increase, protein phosphatase methylesterase (PME-1), in both diseases. PubMed:29281045

Appears in Networks:

path(MESH:"Supranuclear Palsy, Progressive") decreases p(HGNC:LCMT1) View Subject | View Object

Western blot analyses showed a decrease of methyl-PP2A and an increase of demethyl-PP2A with a concomitant reduction in the methyl/demethyl PP2A ratio in both PSP (74%) and AD (76%) brains, associated with an LCMT-1 decrease and a demethylating enzyme increase, protein phosphatase methylesterase (PME-1), in both diseases. PubMed:29281045

Appears in Networks:

act(p(HGNC:PPME1)) negativeCorrelation act(p(HGNC:LCMT1)) View Subject | View Object

PME-1 catalyzes removal of the methyl group, thus reversing the activity of LCMT1 PubMed:19277525

a(CHEBI:"S-adenosyl-L-homocysteine") decreases act(p(HGNC:LCMT1)) View Subject | View Object

Like all methyltransferases,LCMT1 activity depends on the supply of the universal methyl donor, S-adenosylmethionine (SAM),and is inhibited by S-adenosylhomocysteine (SAH; Leulliot et al.,2004; Sontag et al.,2007). PubMed:24653673

a(CHEBI:"S-adenosyl-L-methionine") increases act(p(HGNC:LCMT1)) View Subject | View Object

Like all methyltransferases,LCMT1 activity depends on the supply of the universal methyl donor, S-adenosylmethionine (SAM),and is inhibited by S-adenosylhomocysteine (SAH; Leulliot et al.,2004; Sontag et al.,2007). PubMed:24653673

act(p(HGNC:GSK3B)) decreases act(p(HGNC:LCMT1)) View Subject | View Object

For instance, activated GSK3β has been reported to induce PP2A inactivation via several mechanisms: phosphorylation of PP2A on Tyr307 (Yao et al.,2011); demethylation of PP2A on Leu309 through inhibition of LCMT1 and up-regulation of PME1 (Yao et al.,2012); and accumulation of I2 PP2A (Liu et al.,2008a). PubMed:24653673

Out-Edges 17

p(HGNC:LCMT1) increases p(HGNC:PPP2CA, pmod(Me, Leu, 309)) View Subject | View Object

Notably, methylation of PP2A catalytic C subunit on the Leu- 309 residue by leucine carboxyl methyltransferase 1 (LCMT1) promotes the biogenesis and stabilization of PP2A/B enzymes (20). We have shown that decreased LCMT1 activity and/or expression levels correlate with down-regulation of PP2A methylation and PP2A/B expression levels and with concomitant accumulation of phospho-Tau in AD-affected brain regions (21), in cultured N2a neuroblastoma cells and in vivo PubMed:23943618

Appears in Networks:
Annotations
Disease Ontology (DO)
Alzheimer's disease

p(HGNC:LCMT1) increases p(HGNC:PPP2CA, pmod(Me, Leu, 309)) View Subject | View Object

Western blot analyses showed a decrease of methyl-PP2A and an increase of demethyl-PP2A with a concomitant reduction in the methyl/demethyl PP2A ratio in both PSP (74%) and AD (76%) brains, associated with an LCMT-1 decrease and a demethylating enzyme increase, protein phosphatase methylesterase (PME-1), in both diseases. PubMed:29281045

Appears in Networks:

p(HGNC:LCMT1) increases p(FPLX:PPP2, pmod(Me, Leu, 309)) View Subject | View Object

The addition of a methyl group by LCMT1 at L309 enhances the binding affinity of the core dimer (A&C subunit) toward distinct regulatory subunits and provides specific activity to the holoenzyme [56]. PubMed:23454242

p(HGNC:LCMT1) increases p(HGNC:PPP2CA, pmod(Me, Leu, 309)) View Subject | View Object

Reversible methylation of PP2A is catalyzed by two highly conserved and PP2A-specific enzymes, leucine carboxyl methyltransferase (LCMT1)[21,33] and PP2A methylesterase (PME-1)[17] (Figure 1). PubMed:19277525

p(HGNC:LCMT1) increases p(HGNC:PPP2CA, pmod(Me, Leu, 309)) View Subject | View Object

Furthermore, formation of a stable complex between PP2A and PME-1 likely blocks LCMT1-catalyzed methylation. PubMed:19277525

act(p(HGNC:LCMT1)) negativeCorrelation act(p(HGNC:PPME1)) View Subject | View Object

PME-1 catalyzes removal of the methyl group, thus reversing the activity of LCMT1 PubMed:19277525

p(HGNC:LCMT1) causesNoChange act(complex(GO:"protein phosphatase type 2A complex")) View Subject | View Object

A portion of cellular PP2A stably associated with PME-1 and was catalytically inactive [80]; intriguingly, this inactive portion of PP2A could be re-activated by PP2A phosphatase activator (PTPA), but not by LCMT1, ruling out the possibility that inactivation was solely caused by demethylation PubMed:19277525

p(HGNC:LCMT1) increases p(HGNC:PPP2CA, pmod(Me, Leu, 309)) View Subject | View Object

Proteinphosphatase 2A catalytic subunit is uniquely methylated on Leu-309 by the dedicated leucine carboxyl methyltransferase-1 (LCMT-1; Lee et al.,1996; De Baere et al.,1999). PubMed:24653673

p(HGNC:LCMT1) increases p(HGNC:PPP2CA, pmod(Me, Leu, 309)) View Subject | View Object

Significantly, downregulation of LCMT1 expression leads to a significant decrease of PP2A methylation and concomitant loss of PP2A holoenzymes containing the regulatory Bα (or PPP2R2A) subunit (PP2A/Bα; Lee and Pallas,2007; Sontag et al.,2008; MacKay et al.,2013). PubMed:24653673

p(HGNC:LCMT1) increases p(HGNC:PPP2CA, pmod(Me, Leu, 309)) View Subject | View Object

For example, PME-1 stabilizes a nuclear pool of inactive PP2A enzymes (Longin et al., 2008), while methylation by LCMT1 influences the amounts of PP2A enzymes bound to plasma membrane microdomains (Sontag et al.,2013). PubMed:24653673

p(HGNC:LCMT1) increases p(HGNC:PPP2CA, pmod(Me, Leu, 309)) View Subject | View Object

For instance, activated GSK3β has been reported to induce PP2A inactivation via several mechanisms: phosphorylation of PP2A on Tyr307 (Yao et al.,2011); demethylation of PP2A on Leu309 through inhibition of LCMT1 and up-regulation of PME1 (Yao et al.,2012); and accumulation of I2 PP2A (Liu et al.,2008a). PubMed:24653673

p(HGNC:LCMT1) increases p(HGNC:PPP2CB, pmod(Me, Leu, 309)) View Subject | View Object

Proteinphosphatase 2A catalytic subunit is uniquely methylated on Leu-309 by the dedicated leucine carboxyl methyltransferase-1 (LCMT-1; Lee et al.,1996; De Baere et al.,1999). PubMed:24653673

p(HGNC:LCMT1) increases p(HGNC:PPP2CB, pmod(Me, Leu, 309)) View Subject | View Object

Significantly, downregulation of LCMT1 expression leads to a significant decrease of PP2A methylation and concomitant loss of PP2A holoenzymes containing the regulatory Bα (or PPP2R2A) subunit (PP2A/Bα; Lee and Pallas,2007; Sontag et al.,2008; MacKay et al.,2013). PubMed:24653673

p(HGNC:LCMT1) increases p(HGNC:PPP2CB, pmod(Me, Leu, 309)) View Subject | View Object

For example, PME-1 stabilizes a nuclear pool of inactive PP2A enzymes (Longin et al., 2008), while methylation by LCMT1 influences the amounts of PP2A enzymes bound to plasma membrane microdomains (Sontag et al.,2013). PubMed:24653673

p(HGNC:LCMT1) increases p(HGNC:PPP2CB, pmod(Me, Leu, 309)) View Subject | View Object

For instance, activated GSK3β has been reported to induce PP2A inactivation via several mechanisms: phosphorylation of PP2A on Tyr307 (Yao et al.,2011); demethylation of PP2A on Leu309 through inhibition of LCMT1 and up-regulation of PME1 (Yao et al.,2012); and accumulation of I2 PP2A (Liu et al.,2008a). PubMed:24653673

p(HGNC:LCMT1) regulates complex(a(GO:"protein phosphatase type 2A complex"), a(MESH:"Membrane Microdomains")) View Subject | View Object

For example, PME-1 stabilizes a nuclear pool of inactive PP2A enzymes (Longin et al., 2008), while methylation by LCMT1 influences the amounts of PP2A enzymes bound to plasma membrane microdomains (Sontag et al.,2013). PubMed:24653673

p(HGNC:LCMT1) increases p(FPLX:PPP2, pmod(Me)) View Subject | View Object

Significantly, down-regulation of LCMT1 protein expression parallels the deficits in PP2A methylation observed in AD (Sontag et al.,2004a). PubMed:24653673

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BEL Commons is developed and maintained in an academic capacity by Charles Tapley Hoyt and Daniel Domingo-Fernández at the Fraunhofer SCAI Department of Bioinformatics with support from the IMI project, AETIONOMY. It is built on top of PyBEL, an open source project. Please feel free to contact us here to give us feedback or report any issues. Also, see our Publishing Notes and Data Protection information.

If you find BEL Commons useful in your work, please consider citing: Hoyt, C. T., Domingo-Fernández, D., & Hofmann-Apitius, M. (2018). BEL Commons: an environment for exploration and analysis of networks encoded in Biological Expression Language. Database, 2018(3), 1–11.