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GEN3VA Reports for these tags

MCF7_BD2K_LINCS_DCIC_COURSERA

SOFT file
Title / Description Comprehensive profiling of amino acid response uncovers unique methionine-deprived response dependent on intact creatine biosynthesis
Accession GSE62673
Summary Besides being building blocks for protein synthesis, amino acids serve a wide variety of cellular functions, including acting as metabolic intermediates for ATP generation and for redox homeostasis. Upon amino acid deprivation, free uncharged tRNAs trigger GCN2-ATF4 to mediate the well-characterized transcriptional amino acid response (AAR). However, it is not clear whether the deprivation of different individual amino acids triggers identical or distinct AARs. Here, we characterized the global transcriptional response upon deprivation of one amino acid at a time. With the exception of glycine, which was not required for the proliferation of MCF7 cells, we found that the deprivation of most amino acids triggered a shared transcriptional response that included the activation of ATF4, p53 and TXNIP. However, there was also significant heterogeneity among different individual AARs. The most dramatic transcriptional response was triggered by methionine deprivation, which activated an extensive and unique response in different cell types. We uncovered that the specific methionine-deprived transcriptional response required creatine biosynthesis. This dependency on creatine biosynthesis was caused by the consumption of S-Adenosyl-L-methionine (SAM) during creatine biosynthesis that helps to deplete SAM under methionine deprivation and reduces histone methylations. As such, the simultaneous deprivation of methionine and sources of creatine biosynthesis (either arginine or glycine) abolished the reduction of histone methylation and the methionine-specific transcriptional response. Arginine-derived ornithine was also required for the complete induction of the methionine-deprived specific gene response. Collectively, our data identify a previously unknown set of heterogeneous amino acid responses and reveal a distinct methionine-deprived transcriptional response that results from the crosstalk of arginine, glycine and methionine metabolism via arginine/glycine-dependent creatine biosynthesis.
Organism Homo sapiens
Platform GPL571
Normalized False
Parsed SOFT file
Metadata
Differential expression method Characteristic Direction
Cutoff 500
Organism Homo sapiens
Cell_type MCF7cells
Pert_name leucine
Pert_id PubChemCID:6106
Organism human
Pert_type chemical
Visualizations
Principal Component Analysis
Hierarchical clustering
External Links and Downloads
Gene lists Enrichr L1000CDS2 PAEA Crowdsourcing
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