GO:0070613 regulation of protein processing: Proteolytic Maturation, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0070613 (regulation of protein processing) describes any process that modulates the frequency, rate or extent of protein maturation by cleavage of one or more peptide bonds.
• Protein processing is a post-translational maturation step that converts inactive precursors into functional proteins, and its dysregulation is linked to cancer, neurodegeneration and viral pathogenesis.
• Key regulatory inputs include phosphorylation, ubiquitination, O-GlcNAcylation, palmitoylation and phosphatase activity, which together tune protease accessibility and substrate fate.
• Core experimental models for this term include CRISPR knockout, point-mutation, knock-in and overexpression cell lines, combined with proteomics, imaging and functional assays.
• The term is distinct from protein catabolism and from general post-translational modification; it specifically concerns peptide-bond cleavage events that mature a protein.
• Researchers can map the regulatory network of GO:0070613 using CRISPR library screening and bioinformatics to identify upstream modifiers of processing.
Description
GO:0070613, regulation of protein processing, is a biological_process term that captures any mechanism controlling the frequency, rate or extent of protein maturation by peptide-bond cleavage. Protein processing is a decisive post-translational event: many proteins are synthesized as inactive precursors and only become functional after proteolytic removal of a pro-domain or inhibitory segment. Because this cleavage is irreversible, cells must regulate it tightly, and the regulatory layer itself is the subject of GO:0070613. Understanding this term matters because proteolytic maturation sits at the intersection of signal transduction, cell death, viral replication and metabolic control. For example, alphaherpesvirus proteins are regulated by post-translational phosphorylation that influences their processing and function, while linear ubiquitination controls cell-death signaling in which processing of regulatory proteins is a key step. In plants, protein trafficking and post-translational mechanisms also depend on regulated processing events. Thus, GO:0070613 provides a framework for dissecting how cells decide when and where a protein becomes active.
regulation of protein processing At A Glance
| GO ID | GO:0070613 |
|---|---|
| GO term | regulation of protein processing |
| Ontology | biological_process |
| Synonym | regulation of protein maturation by peptide bond cleavage |
| Major function | Modulates the frequency, rate or extent of protein maturation by peptide-bond cleavage |
| Related processes | Post-translational modification, protein trafficking, signal transduction, cell death |
| Key regulatory inputs | Phosphorylation, ubiquitination, O-GlcNAcylation, palmitoylation, phosphatase activity |
| Disease relevance | Cancer, neurodegeneration, viral pathogenesis, metabolic disorders |
What Is GO:0070613?
In plain terms, GO:0070613 describes the control knobs that decide how often, how fast and to what extent a protein is matured by cutting peptide bonds. The QuickGO definition states: any process that modulates the frequency, rate or extent of protein processing, a protein maturation process achieved by the cleavage of a peptide bond or bonds within a protein. This is not the cleavage itself but the regulatory layer that governs it, including upstream signals, modifying enzymes and spatial constraints that determine whether a protease can access its substrate.
Why Is regulation of protein processing Important in Cell Biology?
Regulation of protein processing is important because it determines when a protein becomes active, and misregulation can drive disease. Phosphorylation-dependent control of alphaherpesvirus proteins illustrates how processing regulation affects viral fitness. Linear ubiquitination regulates cell death and correlative diseases by controlling the stability and processing of signaling proteins. In the brain, protein phosphatases regulate processing-related signaling and neuronal function. In plants, post-translational mechanisms regulate protein trafficking, showing that this term is conserved across kingdoms. Because processing is irreversible, regulatory checkpoints are essential for cellular decision-making, making GO:0070613 a high-value target for mechanistic and therapeutic research.
• Controls whether precursor proteins become functional enzymes, receptors or structural proteins.
• Links post-translational modifications such as phosphorylation and ubiquitination to proteolytic maturation.
• Impacts viral pathogenesis by regulating processing of viral proteins.
• Contributes to cell-death decisions through linear ubiquitination and related signaling.
• Influences metabolic and circadian regulation via O-GlcNAcylation.
• Modulates cardiomyocyte trafficking and signal transduction through palmitoylation.
• Is relevant to brain function through protein phosphatase regulation.
• Affects plant protein trafficking and stress responses.
• Provides a conceptual framework for CRISPR screens targeting processing regulators.
• Supports development of therapeutics that tune proteolytic maturation in disease.
What Happens During regulation of protein processing?
Upstream signal recognition
In simple terms: The cell first senses a signal that tells it to start or stop protein processing.
Regulation of protein processing begins with upstream signals such as phosphorylation, ubiquitination or metabolic cues that mark a substrate or its protease for action. For example, post-translational phosphorylation of alphaherpesvirus proteins modulates their processing and function. Linear ubiquitination acts as a scaffold signal that regulates cell-death proteins and their processing. These signals are recognized by adaptor proteins and modifying enzymes that set the stage for cleavage.
Modification of the substrate or protease
In simple terms: Enzymes add or remove chemical tags on the protein or the protease to control whether cutting can happen.
Once a signal is received, enzymes such as kinases, phosphatases and ubiquitin ligases modify the substrate or the protease. Protein phosphatases in the brain regulate signaling proteins that influence processing events. O-GlcNAcylation is regulated by circadian, metabolic and cellular signals, providing another layer that can affect substrate accessibility. Palmitoylation regulates cardiomyocyte intracellular trafficking and signal transduction, which can indirectly control processing by changing protein localization.
Spatial and trafficking control
In simple terms: The cell moves proteins to the right place so that processing can occur at the right time.
Regulation of protein processing is also spatial: proteins must be trafficked to the correct compartment for cleavage to occur. In plants, post-translational mechanisms regulate protein trafficking, and transcriptional control of trafficking remains an active area. In cardiomyocytes, palmitoylation regulates intracellular trafficking and signal transduction, which can determine whether a substrate meets its processing protease. Thus, trafficking checkpoints are integral to GO:0070613.
Protease accessibility and cleavage
In simple terms: The protease must physically reach the cut site for processing to happen.
The final regulated step is protease accessibility: inhibitors, binding partners and conformational changes can block or expose the cleavage site. Protein phosphatases can alter the phosphorylation state of proteins and thereby influence their susceptibility to processing. Kinesin motors and their regulation illustrate how motor-driven transport can affect the delivery of components needed for processing. When accessibility is permissive, peptide-bond cleavage occurs and the protein matures.
Feedback and termination
In simple terms: After processing, the cell shuts down or adjusts the signal to avoid over-cutting.
Regulation includes negative feedback that terminates processing once sufficient mature protein is produced. Linear ubiquitination pathways are balanced by deubiquitinases and phosphatases that prevent excessive signaling. Circadian and metabolic signals that regulate O-GlcNAcylation also provide temporal feedback. This feedback ensures that protein processing remains proportional to cellular demand.
Key Genes Involved in GO:0070613 regulation of protein processing
The following genes and proteins are experimentally linked to regulation of protein processing and its upstream signaling.
| Gene | Major Role | Research Relevance |
|---|---|---|
| KIF5B | Kinesin motor involved in intracellular transport | Regulation of motor activity affects delivery of processing components |
| KIF1A | Neuronal kinesin motor | Motor regulation influences cargo trafficking relevant to processing |
| DYNC1H1 | Dynein heavy chain for retrograde transport | Transport regulation can affect protease-substrate encounter |
| PPP1CA | Protein phosphatase 1 catalytic subunit | Phosphatase activity regulates brain signaling proteins |
| PPP2CA | Protein phosphatase 2A catalytic subunit | Dephosphorylation modulates processing-related signaling |
| UBA1 | Ubiquitin-activating enzyme | Initiates ubiquitination cascades that regulate protein processing |
| RNF31 | Linear ubiquitin chain assembly complex component | Linear ubiquitination regulates cell death and protein processing |
| SHARPIN | LUBAC component | Regulates linear ubiquitination and downstream processing |
| OTULIN | Deubiquitinase for linear ubiquitin | Counteracts linear ubiquitination to tune processing |
| OGT | O-GlcNAc transferase | Adds O-GlcNAc regulated by circadian and metabolic signals |
| OGA | O-GlcNAcase | Removes O-GlcNAc and modulates processing-related signaling |
| ZDHHC5 | Palmitoyl acyltransferase | Palmitoylation regulates cardiomyocyte trafficking |
| APT1 | Palmitoyl thioesterase | Removes palmitate and affects protein localization |
| FOXO1 | Transcription factor regulated by metabolic signals | FOXO regulation integrates metabolic control of protein function |
| FOXO3 | FOXO family transcription factor | Tissue-specific metabolic regulation of FOXO-binding proteins |
| PPP3CA | Calcineurin A catalytic subunit | Phosphatase regulation in brain signaling |
| USP7 | Deubiquitinase | Regulates stability of processing-related proteins |
How Is regulation of protein processing Regulated?
Regulation of protein processing is itself regulated by multiple signaling inputs. Phosphorylation of alphaherpesvirus proteins modulates their processing and function. Linear ubiquitination provides a scaffold that controls cell-death protein processing. O-GlcNAcylation is regulated by circadian, metabolic and cellular signals, adding a temporal layer. Palmitoylation regulates cardiomyocyte trafficking and signal transduction, which can indirectly control processing. Protein phosphatases in the brain regulate signaling proteins that influence processing events. In plants, post-translational mechanisms and transcriptional control regulate protein trafficking, a prerequisite for processing. Together, these inputs form a regulatory network that determines when and where processing occurs.
regulation of protein processing and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| RNF31 | Inflammatory and cell-death disorders | Knockout cell line with TNF stimulation |
| OTULIN | Autoinflammatory disease | Point-mutation knock-in in immune cells |
| OGT | Metabolic and circadian disorders | Overexpression in hepatocytes |
| PPP1CA | Neurological dysfunction | Knockout in neuronal cultures |
| ZDHHC5 | Cardiomyocyte signaling defects | Knock-in tagged cell line |
Viral pathogenesis
Alphaherpesvirus proteins are regulated by post-translational phosphorylation, which affects their processing and function during infection. This makes regulation of protein processing a key determinant of viral replication and immune evasion.
Cell death and inflammatory disease
Linear ubiquitination regulates cell death and correlative diseases by controlling the processing and stability of signaling proteins. Dysregulation of this pathway can lead to inflammatory and autoimmune conditions.
Metabolic and circadian disorders
O-GlcNAcylation is regulated by circadian, metabolic and cellular signals, and its dysregulation is linked to metabolic disease. Because O-GlcNAcylation can influence protein processing, this pathway connects GO:0070613 to metabolic disorders.
Neurodegeneration
Protein phosphatases in the brain regulate signaling proteins that influence processing events, and their dysfunction is associated with neurological disease. Altered processing regulation may contribute to neurodegeneration.
From regulation of protein processing-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does loss of a processing regulator alter substrate maturation? | CRISPR knockout cell line |
| Does a specific phosphorylation site control processing? | Point-mutation knock-in |
| Where does processing occur in the cell? | Tagged knock-in with imaging |
| Does overexpression of a regulator enhance processing? | Overexpression cell line |
| Which genes modify processing in a genome-wide screen? | CRISPR library screening |
| How does metabolic state affect processing? | Metabolic perturbation with proteomics |
How to Study the regulation of protein processing Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Mass spectrometry proteomics | Protein cleavage products and modifications | Identify regulated processing events |
| Phosphoproteomics | Phosphorylation sites on substrates | Map signaling inputs to processing |
| Ubiquitin remnant profiling | Ubiquitination sites | Detect linear ubiquitination regulators |
| Live-cell imaging | Protein localization and trafficking | Study spatial control of processing |
| CRISPR knockout screening | Gene requirement for processing | Discover regulators genome-wide |
| Overexpression assays | Gain-of-function effects | Test if a regulator enhances processing |
| Metabolic labeling | O-GlcNAcylation dynamics | Link metabolic signals to processing |
| Protein phosphatase assays | Dephosphorylation activity | Measure phosphatase regulation |
Proteomics and substrate identification
Mass spectrometry-based proteomics can identify processed versus unprocessed protein forms and map cleavage sites. This is essential for defining the substrates whose processing is regulated under GO:0070613.
Imaging and trafficking assays
Live-cell imaging of tagged proteins can reveal where processing occurs and how trafficking regulators such as palmitoylation affect localization. These assays connect spatial control to processing regulation.
Phosphorylation and ubiquitination profiling
Phosphoproteomics and ubiquitin remnant profiling can identify modifications that regulate processing. Such datasets reveal upstream signals that modulate protease accessibility.
Functional screens
CRISPR knockout and overexpression screens can systematically test which genes regulate protein processing. Hits can be validated with targeted point mutations and knock-ins.
How CRISPR Can Be Used to Study GO:0070613 regulation of protein processing
Knockout
CRISPR knockout of candidate regulators such as RNF31 or OGT can test whether loss of function alters protein processing. Knockout cell lines are ideal for measuring changes in substrate maturation by proteomics.
Point Mutation
Point mutations at phosphorylation or ubiquitination sites can dissect which residues control processing. For example, mutating a phospho-acceptor site in a viral protein can reveal its role in processing regulation.
Knock-in
Knock-in of tagged or disease-associated alleles allows tracking of processing in live cells. Tagged knock-ins can reveal trafficking-dependent processing.
Overexpression
Overexpression of regulators such as OGT or FOXO proteins can test gain-of-function effects on processing. This approach is useful for validating sufficiency of a regulator.
How EDITGENE Supports regulation of protein processing Research
Researchers studying regulation of protein processing-related genes often need to determine whether a candidate gene is causally involved in peptide-bond cleavage events or merely correlated with them. EDITGENE provides the CRISPR cell models and screening services needed to move from correlation to causation.
Contact EDITGENE today to design your custom CRISPR model for regulation of protein processing research.
Frequently Asked Questions About regulation of protein processing
What is GO:0070613 regulation of protein processing?
GO:0070613 is a biological_process term defined as any process that modulates the frequency, rate or extent of protein processing, a protein maturation process achieved by cleavage of a peptide bond or bonds within a protein.
What genes are involved in regulation of protein processing?
Genes include KIF5B, PPP1CA, RNF31, OGT, ZDHHC5 and FOXO1, which regulate transport, phosphorylation, ubiquitination, O-GlcNAcylation and metabolic signaling relevant to processing.
How is protein processing regulated by phosphorylation?
Phosphorylation of substrate proteins or proteases can alter their conformation, localization or interaction partners, thereby modulating processing.
What is the role of ubiquitination in protein processing?
Linear ubiquitination acts as a scaffold that regulates cell-death signaling proteins and their processing.
How does O-GlcNAcylation regulate protein processing?
O-GlcNAcylation is regulated by circadian, metabolic and cellular signals and can influence substrate accessibility for processing.
What diseases are linked to regulation of protein processing?
Diseases include viral pathogenesis, inflammatory disorders, metabolic disease and neurodegeneration.
What experimental models are used to study GO:0070613?
CRISPR knockout, point-mutation, knock-in, overexpression cell lines and CRISPR library screens are commonly used.
How can I study regulation of protein processing in my lab?
Combine proteomics, phosphoproteomics, imaging and functional screens with CRISPR models to dissect regulatory mechanisms.
What is the difference between protein processing and protein degradation?
Protein processing is a maturation step involving peptide-bond cleavage, whereas degradation is complete breakdown; GO:0070613 specifically regulates the former.
Why is regulation of protein processing important for drug discovery?
Because processing controls protein activity, targeting its regulators can modulate disease pathways in cancer, inflammation and infection.
Conclusion
GO:0070613 regulation of protein processing is a central biological_process that governs when and where proteins mature by peptide-bond cleavage. Its regulatory inputs include phosphorylation, ubiquitination, O-GlcNAcylation, palmitoylation and phosphatase activity, which together determine substrate fate. Dysregulation of this term is linked to viral pathogenesis, inflammatory disease, metabolic disorders and neurodegeneration. CRISPR-based models and multi-omics methods provide powerful tools to dissect these mechanisms and identify therapeutic targets.
References
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- 2. Zhou T et al.. 2022. Regulation of alphaherpesvirus protein via post-translational phosphorylation.. Vet Res 53(1):93 PMID: 36397147
- 3. Liu X et al.. 2024. Regulation of protein O-GlcNAcylation by circadian, metabolic, and cellular signals.. J Biol Chem 300(2):105616 PMID: 38159854
- 4. Essandoh K et al.. 2024. Regulation of cardiomyocyte intracellular trafficking and signal transduction by protein palmitoylation.. Biochem Soc Trans 52(1):41-53 PMID: 38385554
- 5. Gao L et al.. 2023. The mechanism of linear ubiquitination in regulating cell death and correlative diseases.. Cell Death Dis 14(10):659 PMID: 37813853
- 6. Kodani N et al.. 2020. Tissue-Specific Metabolic Regulation of FOXO-Binding Protein: FOXO Does Not Act Alone.. Cells 9(3) PMID: 32182991
- 7. Sim AT. 1991. The regulation and function of protein phosphatases in the brain.. Mol Neurobiol 5(2-4):229-46 PMID: 1668387
- 8. Pizarro L et al.. 2014. Regulation of protein trafficking: posttranslational mechanisms and the unexplored transcriptional control.. Plant Sci 225:24-33 PMID: 25017156
