ArticleThe Biochemical journal2003
Protein phosphatase 1 binds to phospho-Ser-1394 of the macrophage-stimulating protein receptor.
Article in The Biochemical journal, 2003. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
5 citing papers in PubMed, 11 citations in OpenAlex.
- Pathogenesis of RON receptor tyrosine kinase in cancer cells: activation mechanism, functional crosstalk, and signaling addiction.Journal of biomedical research · 2013Review
- MSP-RON signalling in cancer: pathogenesis and therapeutic potential.Nature reviews. Cancer · 2013Review
- Crosstalk of the EphA2 receptor with a serine/threonine phosphatase suppresses the Akt-mTORC1 pathway in cancer cells.Cellular signalling · 2011Article
- Direct interaction between the catalytic subunit of Protein Phosphatase 1 and pRb.Cancer cell international · 2006Article
- Reciprocally interacting domains of protein phosphatase 1 and focal adhesion kinase.Molecular and cellular biochemistry · 2005Article
Corrections and comments
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Authors and funding
3 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The tyrosine kinase Ron, receptor for MSP (macrophage-stimulating protein), displays several serine residues of unknown functions. Using [(32)P]H(3)PO(4) metabolic labelling, we found that Ron is serine-phosphorylated and dephosphorylated in vitro by PP1 (protein phosphatase 1). PP1 associates with Ron obtained from cells of different origins. The association is stimulated by MSP or serum and is prevented by wortmannin, an inhibitor of the Akt/PKB (protein serine/threonine kinase B) pathway. Akt/PKB phosphorylates Ron Ser-1394, thus providing a docking site for 14-3-3 (scaffold proteins binding to phosphoserine/phosphothreonine-containing sequences). In living cells, PP1 binds to the Ron mutant S1394A, but the association is no longer regulated by serum, MSP or wortmannin. The role of PP1 association with Ron is highlighted by (1) Ser-1394 dephosphorylation by PP1 in vitro and in living cells, (2) loss of 14-3-3 association with Ron after Ser-1394 dephosphorylation by PP1 in vitro and (3) an increase in 14-3-3 association after PP1 inactivation in living cells. These results suggest that PP1 can modulate the downstream Ron signalling generated by MSP via Akt/PKB and 14-3-3 binding. This is the first report on ligand-regulated association of PP1 with a growth factor receptor.
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