Phosphatase, Mg2+/Mn2+ Dependent 1B (Ppm1b) regulates the self-renewal of HSCs through the Wnt/β-catenin pathway [scRNA-Seq]
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ABSTRACT:
PROVIDER: PRJNA996541 | ENA |
REPOSITORIES: ENA
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Project description:Hematopoietic stem cells (HSCs) have unique abilities to renew themselves and generate differentiated progenies of all blood cell lineages; however, how HSCs maintain the balance of self-renewal and lineage differentiation remains largely unknown. Herein, we showed that in mice the hematologic system deletion of Phosphatase, Mg2+/Mn2+ Dependent 1B (Ppm1b), a protein serine or threonine phosphatase highly expressed in HSCs, induces the suppression of phenotypic HSC expansion due to the blockage of cell cycle. Loss of Ppm1b impairs HSC self-renewal and hematopoietic reconstitution which were revealed by limiting dilution and BM transplantation assays. Through transcriptomic analysis, we observed that the Wnt/β-catenin pathway is downregulated in Ppm1b-deficient mice. Mechanistically, we provided evidence that Ppm1b interacted with β-catenin by performing a proximity ligation assay. Moreover, using an HN252 as a small molecule probe, we further found that Ppm1b inhibition suppressed the self-renewal of HSC and led to a decrease in common lymphoid progenitor cells, resulting in a reduction of B cells in the bone marrow and peripheral blood in turn. In the study we characterized an indispensable role of Ppm1b in regulating HSC self-renewal and B cell development via Wnt/β-catenin pathway.
2024-07-31 | GSE237746 | GEO
Project description:Hematopoietic stem cells (HSCs) have unique abilities to renew themselves and generate differentiated progenies of all blood cell lineages; however, how HSCs maintain the balance of self-renewal and lineage differentiation remains largely unknown. Herein, we showed that in mice the hematologic system deletion of Phosphatase, Mg2+/Mn2+ Dependent 1B (Ppm1b), a protein serine or threonine phosphatase highly expressed in HSCs, induces the suppression of phenotypic HSC expansion due to the blockage of cell cycle. Loss of Ppm1b impairs HSC self-renewal and hematopoietic reconstitution which were revealed by limiting dilution and BM transplantation assays. Through transcriptomic analysis, we observed that the Wnt/β-catenin pathway is downregulated in Ppm1b-deficient mice. Mechanistically, we provided evidence that Ppm1b interacted with β-catenin by performing a proximity ligation assay. Moreover, using an HN252 as a small molecule probe, we further found that Ppm1b inhibition suppressed the self-renewal of HSC and led to a decrease in common lymphoid progenitor cells, resulting in a reduction of B cells in the bone marrow and peripheral blood in turn. In the study we characterized an indispensable role of Ppm1b in regulating HSC self-renewal and B cell development via Wnt/β-catenin pathway.
2024-07-31 | GSE237745 | GEO
Project description:Phosphatase, Mg2+/Mn2+ Dependent 1B (Ppm1b) regulates the self-renewal of HSCs through the Wnt/β-catenin pathway
| PRJNA996533 | ENA
Project description:Phosphatase, Mg2+/Mn2+ Dependent 1B (Ppm1b) regulates the self-renewal of HSCs through the Wnt/β-catenin pathway [bulk RNA-Seq]
| PRJNA996540 | ENA
Project description:This SuperSeries is composed of the SubSeries listed below.
2024-07-31 | GSE237748 | GEO
Project description:The yeast PMR1 (ATP2C1) gene codes for the eukaryotic prototype of a high affinity P-type ATPase required for Ca2+/Mn2+ transport into the Golgi. Cells lacking PMR1 exhibit multiple genetic interactions with genes involved in DNA recombination and replication, a fact that is not yet understood. We find that deletion of PMR1 causes a delay in DNA replication initiation, progression and G2/M transition and induces the transcriptional up-regulation of genes involved in cell cycle regulation, including CLB5 and SWE1. Interestingly, pmr1∆ clb5∆ double mutants exhibit a dramatic delay in DNA replication and increased DNA breakage, while endoreplication and the formation of multi-nucleated, giant yeast is observed in pmr1∆ swe1∆ cells. Because these phenotypes can be attributed to impeded Mn2+-pump function, we provide a model in which Mn2+ interferes with Mg2+ in the nucleus, and vice versa, Mg2+ interferes with Mn2+ in the Golgi. Consequently, cell cycle progression is challenged by aberrant catalytic activities of enzymes involved in replication and protein glycosylation.
2012-06-18 | GSE29420 | GEO
Project description:The yeast PMR1 (ATP2C1) gene codes for the eukaryotic prototype of a high affinity P-type ATPase required for Ca2+/Mn2+ transport into the Golgi. Cells lacking PMR1 exhibit multiple genetic interactions with genes involved in DNA recombination and replication, a fact that is not yet understood. We find that deletion of PMR1 causes a delay in DNA replication initiation, progression and G2/M transition and induces the transcriptional up-regulation of genes involved in cell cycle regulation, including CLB5 and SWE1. Interestingly, pmr1M-bM-^HM-^F clb5M-bM-^HM-^F double mutants exhibit a dramatic delay in DNA replication and increased DNA breakage, while endoreplication and the formation of multi-nucleated, giant yeast is observed in pmr1M-bM-^HM-^F swe1M-bM-^HM-^F cells. Because these phenotypes can be attributed to impeded Mn2+-pump function, we provide a model in which Mn2+ interferes with Mg2+ in the nucleus, and vice versa, Mg2+ interferes with Mn2+ in the Golgi. Consequently, cell cycle progression is challenged by aberrant catalytic activities of enzymes involved in replication and protein glycosylation. Three repeats of pmr1M-bM-^HM-^F mutant. Total RNA levels in pmr1M-bM-^HM-^F mutants were analyzed and compared to the wild type submitted to the GEO database under the accession number GSE29334 (C. Gonzalez-Aguilera and A. Aguilera).
2012-06-17 | E-GEOD-29420 | biostudies-arrayexpress
Project description:B cell antigen receptor (BCR) signaling is initiated by protein kinases and limited by counteracting phosphatases that currently are less well studied in their regulation of BCR signaling. We here used the B cell line Ramos to identify and quantify human B cell signaling components. Specifically, a protein tyrosine phosphatase profiling revealed a high expression of the protein tyrosine phosphatase 1B (PTP1B) in Ramos and human naive B cells. The loss of PTP1B leads to increased B cell activation. Through substrate trapping in combination with quantitative mass spectrometry, we identified 22 putative substrates or interactors of PTP1B. We validated Igalpha, CD22, PLCgamma1/2, CBL, BCAP and APLP2 as specific substrates of PTP1B in Ramos B cells. The tyrosine kinase BTK and the two adaptor proteins GRB2 and VAV1 were identified as direct binding partners and potential substrates of PTP1B. We showed that PTP1B dephosphorylates the inhibitory receptor protein CD22 at phosphotyrosine 807. We conclude that PTP1B negatively modulates BCR signaling by dephosphorylating distinct phosphotyrosines in B cell specific receptor proteins and various downstream signaling components.
2022-02-16 | PXD024038 | Pride
Project description:B cell antigen receptor (BCR) signaling is initiated by protein kinases and limited by counteracting phosphatases that currently are less well studied in their regulation of BCR signaling. We here used the B cell line Ramos to identify and quantify human B cell signaling components. Specifically, a protein tyrosine phosphatase profiling revealed a high expression of the protein tyrosine phosphatase 1B (PTP1B) in Ramos and human naive B cells. The loss of PTP1B leads to increased B cell activation. Through substrate trapping in combination with quantitative mass spectrometry, we identified 22 putative substrates or interactors of PTP1B. We validated Igalpha, CD22, PLCgamma1/2, CBL, BCAP and APLP2 as specific substrates of PTP1B in Ramos B cells. The tyrosine kinase BTK and the two adaptor proteins GRB2 and VAV1 were identified as direct binding partners and potential substrates of PTP1B. We showed that PTP1B dephosphorylates the inhibitory receptor protein CD22 at phosphotyrosine 807. We conclude that PTP1B negatively modulates BCR signaling by dephosphorylating distinct phosphotyrosines in B cell specific receptor proteins and various downstream signaling components.
2022-02-16 | PXD024086 | Pride
Project description:B cell antigen receptor (BCR) signaling is initiated by protein kinases and limited by counteracting phosphatases that currently are less well studied in their regulation of BCR signaling. We here used the B cell line Ramos to identify and quantify human B cell signaling components. Specifically, a protein tyrosine phosphatase profiling revealed a high expression of the protein tyrosine phosphatase 1B (PTP1B) in Ramos and human naive B cells. The loss of PTP1B leads to increased B cell activation. Through substrate trapping in combination with quantitative mass spectrometry, we identified 22 putative substrates or interactors of PTP1B. We validated Igalpha, CD22, PLCgamma1/2, CBL, BCAP and APLP2 as specific substrates of PTP1B in Ramos B cells. The tyrosine kinase BTK and the two adaptor proteins GRB2 and VAV1 were identified as direct binding partners and potential substrates of PTP1B. We showed that PTP1B dephosphorylates the inhibitory receptor protein CD22 at phosphotyrosine 807. We conclude that PTP1B negatively modulates BCR signaling by dephosphorylating distinct phosphotyrosines in B cell specific receptor proteins and various downstream signaling components.
2022-02-16 | PXD024037 | Pride