GO:1903939 regulation of TORC2 signaling: Signaling Pathway, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:1903939 (regulation of TORC2 signaling) is a biological process that modulates the frequency, rate or extent of TORC2 signaling.
• TORC2 is a conserved multiprotein complex that phosphorylates AGC-family kinases such as AKT, SGK and PKC to control growth, metabolism and survival [1,6].
• Regulation occurs at multiple levels: membrane recruitment, subunit phosphorylation, lipid binding, and GTPase-dependent localization [2,4,5].
• In budding yeast, Rab5 GTPases and casein kinase 1 control TORC2 localization and activity, providing tractable genetic models [5,7].
• Dysregulated TORC2/mTORC2 signaling is implicated in cancer, metabolic disease, neurodegeneration and immune cell function [1,6,8].
• CRISPR knockout, point-mutation, knock-in and overexpression models enable causal dissection of TORC2 regulatory nodes [1,2,6].
Description
GO:1903939, regulation of TORC2 signaling, is a Gene Ontology biological process defined as any process that modulates the frequency, rate or extent of TORC2 signaling. TORC2 (target of rapamycin complex 2) is an evolutionarily conserved serine/threonine kinase complex that phosphorylates AGC-family kinases including AKT, SGK and PKC, thereby controlling cell growth, metabolism, survival and cytoskeletal organization [1,6]. Because TORC2 activity must be tuned to nutrient, hormonal and mechanical cues, its regulation is central to organismal physiology and disease [2,6]. Researchers study GO:1903939 to understand how upstream inputs are converted into TORC2 activation and how misregulation contributes to cancer, metabolic disorders and immune dysfunction [1,6,8]. The term encompasses both positive and negative regulatory events, including membrane recruitment, subunit phosphorylation, lipid interactions and GTPase-mediated localization [2,4,5]. In budding yeast, genetic screens have identified Rab5 GTPases and casein kinase 1 as key regulators of TORC2 function and localization, offering a powerful model for mechanistic studies [5,7]. This article integrates the QuickGO definition with verified PubMed literature to summarize the mechanisms, key genes, disease links and experimental methods relevant to GO:1903939. It is intended for researchers designing CRISPR-based models to dissect TORC2 regulatory networks [1,2,6].
regulation of TORC2 signaling At A Glance
| GO ID | GO:1903939 |
|---|---|
| GO term | regulation of TORC2 signaling |
| Ontology | biological_process |
| Synonym | regulation of TORC2 signal transduction |
| Major function | Modulates the frequency, rate or extent of TORC2 signaling |
| Cellular context | Membrane-associated multiprotein complex signaling [2,4] |
| Key regulators | Rab5 GTPases, casein kinase 1, lipid-binding domains [5,7] |
| Downstream effectors | AGC kinases including AKT, SGK and PKC [1,6] |
| Model organisms | Saccharomyces cerevisiae, mammalian cell lines [4,5,7] |
What Is GO:1903939?
In simple terms, GO:1903939 describes all the ways cells adjust the activity of TORC2 signaling up or down. The official QuickGO definition is: any process that modulates the frequency, rate or extent of TORC2 signaling. This includes molecular events that recruit TORC2 to membranes, modify its subunits, or alter its ability to phosphorylate downstream substrates such as AKT, SGK and PKC [1,2,6]. Regulation can be positive or negative and occurs in response to nutrients, growth factors, hormones and stress [2,6].
Why Is regulation of TORC2 signaling Important in Cell Biology?
Regulation of TORC2 signaling is critical because TORC2 sits at the center of growth factor, nutrient and metabolic signaling networks that control cell survival, proliferation and metabolism [1,6]. Dysregulation of TORC2/mTORC2 is linked to cancer, insulin resistance, neurodegeneration and immune disorders, making its regulatory mechanisms attractive therapeutic targets [1,6,8]. Understanding GO:1903939 helps researchers interpret how upstream cues are integrated and how genetic or pharmacological perturbations alter downstream AGC kinase phosphorylation [2,6].
• Controls phosphorylation of AKT at Ser473, a key node in PI3K-AKT signaling [1,6].
• Regulates SGK and PKC, influencing ion transport, cytoskeletal dynamics and survival [1,6].
• Integrates nutrient and growth factor signals to coordinate cell growth [2,6].
• Modulates metabolic homeostasis, including lipid metabolism.
• Influences immune cell function and innate immune signaling.
• Implicated in cancer progression through hyperactive mTORC2 signaling [1,6].
• Linked to neurodegeneration and aging-related pathways [1,6].
• Provides a conserved model in yeast for genetic dissection of TORC2 regulation [4,5,7].
• Offers targets for pharmacological intervention in metabolic disease [1,6].
• Enables CRISPR-based causal studies of regulatory nodes [1,2,6].
What Happens During regulation of TORC2 signaling?
Membrane Recruitment and Localization
In simple terms: TORC2 must be in the right place at the right time to signal.
TORC2 is recruited to membranes through interactions with lipid-binding domains and small GTPases, which determines its access to substrates [2,4]. In budding yeast, Rab5 GTPases regulate TORC2 localization and function, linking endosomal trafficking to TORC2 activity. Casein kinase 1 also controls components of the TORC2 signaling network, affecting localization and downstream phosphorylation.
Subunit Phosphorylation and Conformational Changes
In simple terms: Adding phosphate groups to TORC2 subunits can switch the complex on or off.
Phosphorylation of TORC2 subunits by upstream kinases modulates complex assembly and activity [2,6]. Casein kinase 1 controls components of the TORC2 signaling network in budding yeast, demonstrating a conserved phosphorylation-dependent regulatory layer. These modifications can alter substrate accessibility and complex stability.
GTPase and Lipid Signaling Inputs
In simple terms: Small GTPases and lipids act like traffic signals for TORC2.
Rab5 GTPases regulate TORC2 function and localization in Saccharomyces cerevisiae, providing a direct link between vesicular trafficking and TORC2 regulation. Lipid-binding domains within TORC2 subunits sense membrane composition, contributing to activation [2,4]. These inputs ensure TORC2 responds to changes in membrane dynamics and nutrient status [2,5].
Downstream Effector Phosphorylation
In simple terms: Once active, TORC2 phosphorylates other kinases to propagate the signal.
Activated TORC2 phosphorylates AGC-family kinases including AKT, SGK and PKC, which then regulate diverse cellular processes [1,6]. This step is the functional output of regulation of TORC2 signaling and is commonly measured by phospho-AKT Ser473 levels [1,6]. Cross-talk with other signaling networks, such as Hedgehog signaling, can modulate mTORC2 activity non-cell-autonomously.
Feedback and Cross-Talk Regulation
In simple terms: Other pathways can turn TORC2 up or down to keep signaling balanced.
The mTORC2 signaling network is subject to extensive cross-talk with mTORC1, PI3K and other pathways, creating feedback loops that fine-tune activity [1,6]. Hedgehog signaling can regulate mTORC2 non-cell-autonomously to maintain lipid homeostasis, illustrating inter-tissue regulation. Innate immune and metabolic signals can also influence membrane dynamics relevant to TORC2 regulation.
Key Genes Involved in GO:1903939 regulation of TORC2 signaling
The following genes and proteins are central to regulation of TORC2 signaling, based on verified literature [1,2,4,5,6,7,8].
| Gene | Major Role | Research Relevance |
|---|---|---|
| MTOR | Catalytic subunit of TORC2; phosphorylates AGC kinases | Core kinase for mTORC2 signaling studies [1,6] |
| RICTOR | Defining subunit of TORC2; scaffolds complex assembly | Essential for TORC2 integrity and function [1,6] |
| AKT1 | Downstream effector phosphorylated at Ser473 by TORC2 | Readout of TORC2 activity in cancer and metabolism [1,6] |
| SGK1 | AGC kinase substrate of TORC2 | Ion transport and survival signaling [1,6] |
| PRKCA | PKC family kinase regulated by TORC2 | Cytoskeletal and survival pathways [1,6] |
| RAB5A | GTPase regulating TORC2 localization in yeast | Model for GTPase-dependent TORC2 regulation |
| CSNK1 | Casein kinase 1 controlling TORC2 network components | Phosphorylation-dependent regulation |
| DEPTOR | Inhibitory subunit of mTOR complexes | Negative regulation of TORC2 [1,6] |
| SIN1 | Subunit of TORC2; mediates complex assembly | Structural and regulatory studies [1,6] |
| PROTOR1 | Subunit of TORC2 | Modulates mTORC2 function [1,6] |
| Hedgehog signaling components | Non-cell-autonomous regulation of mTORC2 | Lipid homeostasis and inter-tissue signaling |
| Rab5 GTPases | Regulate TORC2 function and localization | Yeast genetic models |
| Casein kinase 1 | Controls TORC2 network components | Phosphorylation studies |
| AGC kinases | Downstream effectors of TORC2 | Functional readouts [1,6] |
| PI3K | Upstream input to mTORC2 via PIP3 | Cross-talk studies [1,6] |
| mTORC1 | Parallel complex with feedback to mTORC2 | Network cross-talk [1,6] |
| Lipid-binding domain proteins | Membrane recruitment of TORC2 | Localization studies [2,4] |
| Innate immune signaling factors | Metabolic and immune inputs to TORC2 regulation | Immune-metabolic studies |
How Is regulation of TORC2 signaling Regulated?
Regulation of TORC2 signaling is itself controlled by multiple upstream inputs, including growth factors, nutrients, GTPases and lipid signals [1,2,6]. In yeast, Rab5 GTPases and casein kinase 1 directly modulate TORC2 localization and activity [5,7]. In mammals, PI3K-generated PIP3 and Hedgehog signaling can influence mTORC2 activity, sometimes non-cell-autonomously [6,8]. Feedback loops from mTORC1 and other pathways further tune TORC2 output [1,6]. Innate immune and metabolic signals can also affect membrane dynamics relevant to TORC2 regulation.
regulation of TORC2 signaling and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| MTOR | Cancer, metabolic disease | CRISPR knockout in cancer cell lines [1,6] |
| RICTOR | Cancer, immune dysfunction | Conditional knockout mouse models [1,6] |
| AKT1 | Cancer, insulin resistance | Point-mutation knock-in of Ser473 [1,6] |
| RAB5A | Vesicular trafficking and TORC2 regulation | Yeast knockout and localization studies |
| CSNK1 | TORC2 network regulation | Yeast kinase-dead mutants |
Cancer
Hyperactive mTORC2 signaling, driven by dysregulated regulation of TORC2 signaling, promotes tumor growth and survival through AKT Ser473 phosphorylation [1,6]. Targeting TORC2 regulatory nodes is an active area of cancer research [1,6].
Metabolic Disorders
mTORC2 regulates lipid homeostasis and glucose metabolism, and its dysregulation is linked to insulin resistance and metabolic disease [1,6,8]. Hedgehog-dependent non-cell-autonomous regulation of mTORC2 maintains lipid homeostasis, highlighting inter-tissue control.
Neurodegeneration and Aging
TORC2 signaling influences neuronal survival and aging-related pathways, and its misregulation has been implicated in neurodegenerative conditions [1,6]. Further studies are needed to define causal mechanisms [1,6].
Immune and Inflammatory Conditions
Innate immune and metabolic signals can induce membrane remodeling relevant to TORC2 regulation, linking this process to inflammatory responses. Immune cell function depends on precise TORC2 activity [1,6].
From regulation of TORC2 signaling-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does a candidate gene regulate TORC2 activity? | CRISPR knockout followed by phospho-AKT Ser473 readout [1,6] |
| Is a specific phosphorylation site required? | Point-mutation knock-in of phospho-deficient or phospho-mimetic residues [1,6] |
| How does a regulatory protein localize? | Tagged knock-in with fluorescent or epitope tags [2,4] |
| Does overexpression alter TORC2 signaling? | CRISPR overexpression models [1,6] |
| Which genes modulate TORC2 in a network? | CRISPR library screening with phospho-AKT readout [1,6] |
| How do GTPases control TORC2? | Yeast Rab5 knockout and localization assays |
How to Study the regulation of TORC2 signaling Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Immunoblotting | Phospho-AKT Ser473 levels | Validation of TORC2 activity [1,6] |
| Phospho-proteomics | Global phosphorylation changes | Network analysis of TORC2 regulation [1,6] |
| CRISPR knockout screening | Gene requirement for TORC2 signaling | Discovery of novel regulators [1,6] |
| Fluorescence microscopy | Subcellular localization of TORC2 | Membrane recruitment studies [2,4,5] |
| Co-immunoprecipitation | Protein-protein interactions in TORC2 | Complex assembly analysis [1,6] |
| Yeast genetics | GTPase and kinase regulatory pathways | Model organism studies [4,5,7] |
| RNA-seq | Transcriptional consequences of TORC2 perturbation | Downstream pathway analysis [1,6] |
| Bioinformatics pathway analysis | Enrichment of TORC2-related networks | Data interpretation [1,6] |
Phospho-Proteomics and Immunoblotting
Measuring phosphorylation of AKT Ser473, SGK and PKC provides a direct readout of TORC2 activity and its regulation [1,6]. These methods are widely used to validate CRISPR perturbations [1,6].
CRISPR Screening and Functional Genomics
Pooled CRISPR knockout or activation screens coupled with phospho-AKT readouts can identify novel regulators of TORC2 signaling [1,6]. Bioinformatics analysis prioritizes candidate genes for validation [1,6].
Imaging and Localization Studies
Fluorescence microscopy of tagged TORC2 subunits reveals membrane recruitment and localization dynamics, as demonstrated in yeast studies of Rab5 GTPases [5,7]. Live-cell imaging can track regulatory events in real time [2,4].
Genetic and Biochemical Assays in Yeast
Saccharomyces cerevisiae provides a tractable system to dissect TORC2 regulation, including casein kinase 1 and Rab5 GTPase pathways [4,5,7]. Biochemical assays measure complex integrity and kinase activity [4,7].
How CRISPR Can Be Used to Study GO:1903939 regulation of TORC2 signaling
Knockout
CRISPR knockout of candidate regulators such as RICTOR, RAB5A or CSNK1 allows causal testing of their role in regulation of TORC2 signaling, typically read out by phospho-AKT Ser473 [1,5,6,7].
Point Mutation
Point-mutation knock-in of phosphorylation sites or catalytic residues in TORC2 subunits or regulators can define their functional importance without altering protein levels [1,6].
Knock-in
Tagged knock-in of TORC2 subunits with fluorescent or epitope tags enables localization and interaction studies in native chromatin context [2,4].
Overexpression
CRISPR overexpression of regulatory genes can test sufficiency for TORC2 activation or inhibition, complementing loss-of-function studies [1,6].
How EDITGENE Supports regulation of TORC2 signaling Research
Researchers studying regulation of TORC2 signaling-related genes often need to determine whether a candidate gene is causally involved in modulating TORC2 activity, localization or downstream effector phosphorylation. Rigorous causal inference requires well-controlled genetic models that isolate the gene of interest from compensatory network effects [1,2,6].
Contact EDITGENE today to design your custom CRISPR model for regulation of TORC2 signaling research.
Frequently Asked Questions About regulation of TORC2 signaling
What is GO:1903939 regulation of TORC2 signaling?
GO:1903939 is a Gene Ontology biological process defined as any process that modulates the frequency, rate or extent of TORC2 signaling.
What genes are involved in regulation of TORC2 signaling?
Key genes include MTOR, RICTOR, AKT1, SGK1, PRKCA, RAB5A and CSNK1, among others [1,5,6,7].
Why is regulation of TORC2 signaling important?
It controls AGC kinase phosphorylation and is linked to cancer, metabolic disease, neurodegeneration and immune function [1,6,8].
How is TORC2 signaling regulated?
Through membrane recruitment, subunit phosphorylation, GTPase and lipid inputs, and feedback cross-talk [2,4,5,6,7].
What is the role of Rab5 GTPases in TORC2 regulation?
Rab5 GTPases regulate TORC2 function and localization in Saccharomyces cerevisiae.
How does casein kinase 1 control TORC2?
Casein kinase 1 controls components of the TORC2 signaling network in budding yeast.
What diseases are linked to TORC2 dysregulation?
Cancer, metabolic disorders, neurodegeneration and immune-related conditions [1,3,6,8].
How can CRISPR be used to study regulation of TORC2 signaling?
CRISPR knockout, point mutation, knock-in and overexpression models enable causal testing of regulatory genes [1,2,6].
What methods measure TORC2 activity?
Phospho-AKT Ser473 immunoblotting, phospho-proteomics and imaging of tagged subunits [1,2,4,6].
Is TORC2 regulation conserved between yeast and mammals?
Yes, core regulatory mechanisms are conserved, making yeast a valuable model [4,5,7].
Conclusion
GO:1903939 regulation of TORC2 signaling is a central biological process that integrates nutrient, growth factor and lipid cues to control AGC kinase phosphorylation and cellular physiology [1,6]. Its dysregulation contributes to cancer, metabolic disease and immune dysfunction, making it a high-priority research area [1,6,8]. CRISPR-based models and functional genomics provide powerful tools to dissect the regulatory network and identify therapeutic targets [1,2,6].
References
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- 2. Fu W et al.. 2020. Regulation of mTORC2 Signaling.. Genes (Basel) 11(9) PMID: 32899613
- 3. Wang Y et al.. 2025. Innate immune and metabolic signals induce mitochondria-dependent membrane lysis via mitoxyperiosis.. Cell 188(25):7155-7174.e25 PMID: 41317732
- 4. Emmerstorfer-Augustin A et al.. 2023. Regulation of TORC2 Function and Localization in Yeast.. Annu Rev Cell Dev Biol 39:363-389 PMID: 37339679
- 5. Locke MN et al.. 2019. Regulation of TORC2 function and localization by Rab5 GTPases in Saccharomyces cerevisiae.. Cell Cycle 18(10):1084-1094 PMID: 31068077
- 6. Ragupathi A et al.. 2024. The mTORC2 signaling network: targets and cross-talks.. Biochem J 481(2):45-91 PMID: 38270460
- 7. Lucena R et al.. 2024. Casein kinase 1 controls components of a TORC2 signaling network in budding yeast.. J Cell Sci 137(24) PMID: 39704566
- 8. VanDerMolen KR et al.. 2025. Non-cell-autonomous regulation of mTORC2 by Hedgehog signaling maintains lipid homeostasis.. Cell Rep 44(1):115191 PMID: 39786994
