GO:1903332 regulation of protein folding: Protein Homeostasis Pathway, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:1903332 (regulation of protein folding) is a biological process term defined as any process that modulates the frequency, rate or extent of protein folding.
• Protein folding begins co-translationally on the ribosome and is regulated by chaperones, chaperonins, and co-chaperones that prevent aggregation and guide native structure.
• The Hsp70 and HSP90 chaperone networks are central regulators of folding, controlling client protein maturation, signaling, and proteostasis.
• Folding regulation is coupled to translation rate and codon usage, which influence co-translational folding efficiency and protein structure.
• Altered regulation of protein folding contributes to cancer, cystic fibrosis, and signaling disorders, making it a therapeutic target.
• CRISPR knockout, point-mutation, knock-in, and overexpression models enable causal dissection of folding regulators in disease and cell biology.
Description
GO:1903332, regulation of protein folding, is a Gene Ontology biological process term that describes any process modulating the frequency, rate, or extent of protein folding. Protein folding is the physical process by which a polypeptide chain acquires its functional three-dimensional structure, and its regulation is essential for proteostasis, signaling, and cell survival. Because misfolded proteins underlie many human diseases, understanding how folding is regulated has become a central question in molecular cell biology. The term encompasses diverse mechanisms, including chaperone activity, chaperonin ATPase activity, co-chaperone activity, and multichaperone pathways that coordinate folding in the cytosol, endoplasmic reticulum, and mitochondria. Regulation occurs at multiple levels: co-translational folding on the ribosome, post-translational chaperone-assisted refolding, and degradation of terminally misfolded species. Recent work has shown that codon usage and translation elongation rates directly influence co-translational folding and final protein structure, linking gene expression to folding regulation. In disease, folding regulation is subverted in cancer, where p53 function is altered through changes in protein-folding pathways, and in cystic fibrosis, where small-molecule folding correctors rescue CFTR trafficking. This article synthesizes authoritative GO annotations and verified PubMed literature to provide a research-grade overview of GO:1903332, its molecular players, disease relevance, and experimental methods for study.
regulation of protein folding At A Glance
| GO ID | GO:1903332 |
|---|---|
| GO term | regulation of protein folding |
| Ontology | biological_process |
| Definition | Any process that modulates the frequency, rate or extent of protein folding. |
| Synonyms | regulation of alpha-tubulin folding; regulation of beta-tubulin folding; regulation of chaperone activity; regulation of chaperonin ATPase activity; regulation of chaperonin-mediated tubulin folding; regulation of co-chaperone activity; regulation of co-chaperonin activity; regulation of glycoprotein-specific chaperone activity; regulation of non-chaperonin molecular chaperone ATPase activity; regulation of protein complex assembly; multichaperone pathway |
| Major function | Controls protein folding efficiency, chaperone activity, and proteostasis through chaperone and chaperonin networks. |
| Related processes | Co-translational folding, chaperone-mediated folding, unfolded protein response, protein degradation. |
| Key regulators | Hsp70, Hsp90, chaperonins, co-chaperones, and translation elongation factors. |
| Disease relevance | Cancer, cystic fibrosis, neurodegeneration, and signaling disorders. |
What Is GO:1903332?
In our own words, GO:1903332 (regulation of protein folding) refers to any cellular process that controls how often, how fast, or to what extent a protein folds into its native conformation. It includes the regulation of chaperone and co-chaperone activities, chaperonin ATPase activity, tubulin folding pathways, and multichaperone assembly pathways that collectively ensure proteins reach functional states or are targeted for degradation.
Why Is regulation of protein folding Important in Cell Biology?
Regulation of protein folding is fundamental to cellular proteostasis because it determines whether newly synthesized polypeptides attain functional conformations or become toxic aggregates. Chaperone networks, particularly Hsp70 and Hsp90 systems, regulate the folding of hundreds of client proteins, including kinases, transcription factors, and signaling molecules, thereby influencing cell growth, differentiation, and stress responses. Disruption of folding regulation is implicated in cancer, where p53 folding pathways are altered, and in cystic fibrosis, where CFTR misfolding causes disease and can be corrected pharmacologically. Moreover, codon usage and translation kinetics modulate co-translational folding, linking gene sequence to protein structure and function. Understanding GO:1903332 therefore provides mechanistic insight into disease and identifies therapeutic targets for folding correctors and chaperone inhibitors.
• Maintains proteostasis by preventing aggregation of newly synthesized and stress-damaged proteins.
• Regulates signaling pathways through folding-dependent control of kinases and transcription factors.
• Determines the fate of disease-associated proteins such as CFTR and p53.
• Couples translation rate and codon usage to co-translational folding efficiency.
• Provides targets for pharmacological chaperones and folding correctors in genetic disease.
• Underlies cancer cell dependence on chaperone networks for oncogenic signaling.
• Influences protein complex assembly and multichaperone pathway coordination.
• Enables experimental dissection of genotype-phenotype relationships via CRISPR models.
What Happens During regulation of protein folding?
Co-translational folding on the ribosome
In simple terms: Proteins start folding while they are still being made by the ribosome.
Protein folding begins co-translationally as the nascent polypeptide emerges from the ribosomal exit tunnel, where local secondary structure forms and chaperones engage the chain. Ribosome profiling studies have revealed global views of translation and how elongation rates shape folding outcomes. Codon usage influences translation speed, which in turn affects co-translational folding and final protein structure. Regulation at this stage ensures that emerging domains fold correctly and do not aggregate in the crowded cellular environment.
Chaperone-assisted folding and refolding
In simple terms: Molecular chaperones help proteins fold correctly and refold if they misfold.
The Hsp70 chaperone network binds exposed hydrophobic segments of polypeptides and, through ATP-dependent cycles, promotes folding and prevents aggregation. Hsp90 acts downstream on near-native clients, particularly signaling proteins, and its ATPase cycle is regulated by co-chaperones. These chaperone systems constitute a multichaperone pathway that coordinates folding, maturation, and quality control. Regulation of chaperone activity is therefore a core component of GO:1903332.
Chaperonin-mediated folding and tubulin biogenesis
In simple terms: Chaperonins are barrel-shaped machines that fold certain proteins, including tubulin.
Chaperonins, including the eukaryotic CCT/TRiC complex, provide an isolated compartment for ATP-dependent folding of actin and tubulin. The GO synonyms regulation of alpha-tubulin folding, regulation of beta-tubulin folding, and regulation of chaperonin-mediated tubulin folding reflect this specialized folding regulation. Chaperonin ATPase activity is itself regulated to match client load and cellular demand. This ensures proper cytoskeletal assembly and mitotic function.
Folding quality control and degradation coupling
In simple terms: If a protein cannot fold correctly, the cell tags it for destruction.
Terminally misfolded proteins are recognized by quality-control machinery and targeted for degradation, coupling folding regulation to proteolysis. The balance between folding and degradation is modulated by chaperone availability and stress conditions. In disease, this balance is disrupted; for example, CFTR misfolding leads to degradation, which can be partially corrected by type I folding correctors. Similarly, p53 function is regulated through alterations in protein-folding pathways.
Stress-responsive regulation of folding capacity
In simple terms: Cells increase folding help when they are stressed.
Heat shock and proteotoxic stress induce chaperone expression to expand folding capacity, a process regulated transcriptionally and post-translationally. The Hsp70 and Hsp90 networks are central to this stress response and are implicated in cancer cell survival. Folding regulation also intersects with signaling pathways, as folding changes can modulate signal transduction. This adaptive regulation is essential for recovery from stress and for maintaining proteostasis.
Key Genes Involved in GO:1903332 regulation of protein folding
The following genes and proteins are central to the regulation of protein folding (GO:1903332), based on verified literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| HSPA1A | Hsp70 chaperone; ATP-dependent folding and refolding | Core Hsp70 network component; knockout and overexpression models for proteostasis |
| HSPA8 | Constitutively expressed Hsp70; co-translational folding | Ribo-seq and proteomics studies of folding regulation |
| HSP90AA1 | Hsp90 chaperone; maturation of signaling clients | Cancer and signaling research; point mutations in ATPase domain |
| HSP90AB1 | Hsp90 beta isoform; client protein maturation | Chaperone inhibitor studies and knock-in models |
| HSPD1 | Hsp60 chaperonin; mitochondrial protein folding | Mitochondrial proteostasis and disease models |
| CCT1 (TCP1) | Chaperonin subunit; actin and tubulin folding | Tubulin folding regulation and cytoskeleton studies |
| CCT2 | Chaperonin subunit; substrate encapsulation | Chaperonin ATPase regulation studies |
| STIP1 | Co-chaperone bridging Hsp70 and Hsp90 | Multichaperone pathway dissection |
| DNAJA1 | Hsp40 co-chaperone; stimulates Hsp70 ATPase | Co-chaperone activity regulation |
| DNAJB1 | Hsp40 co-chaperone; substrate targeting | Folding regulation and stress response |
| BAG3 | Co-chaperone; chaperone-assisted selective autophagy | Protein quality control and disease models |
| CHIP (STUB1) | E3 ligase; couples folding to degradation | Folding quality control research |
| CFTR | Chloride channel; folding-corrected by small molecules | Cystic fibrosis folding corrector studies |
| TP53 | Tumor suppressor; folding-dependent function | Cancer folding pathway regulation |
| RPL5 | Ribosomal protein; translation and co-translational folding | Ribosome profiling and ribosomopathy models |
| EEF1A1 | Translation elongation factor; folding kinetics | Codon usage and folding studies |
| HSPB1 | Small heat shock protein; aggregation prevention | Stress and folding regulation models |
How Is regulation of protein folding Regulated?
Regulation of protein folding is itself controlled at multiple levels. Transcriptionally, heat shock factor 1 (HSF1) induces chaperone genes under stress, expanding folding capacity. Translationally, codon usage and elongation rates modulate co-translational folding, as shown by ribosome profiling and codon-usage studies. Post-translationally, co-chaperones such as DNAJA1, DNAJB1, STIP1, and BAG3 regulate Hsp70 and Hsp90 ATPase cycles and client targeting. Folding is also coupled to degradation via CHIP/STUB1, which ubiquitinates misfolded clients. In disease, pharmacological correctors can directly modulate folding, as demonstrated for CFTR type I correctors. Signaling pathways, including those involving p53, are sensitive to folding pathway alterations.
regulation of protein folding and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| CFTR | Cystic fibrosis; folding and trafficking defect | Knock-in of F508del; folding corrector assays |
| TP53 | Cancer; folding-dependent tumor suppression | Point-mutation knock-in; folding and function assays |
| HSP90AA1 | Cancer; chaperone dependency | Knockout and point-mutation models; inhibitor studies |
| HSPA1A | Proteostasis and stress-related disease | Knockout and overexpression models |
| STUB1 | Protein quality control disorders | Knockout; degradation and folding assays |
Cancer and folding pathway dysregulation
Cancer cells often depend on enhanced chaperone activity to maintain oncogenic signaling proteins in folded, functional states. p53 function is regulated through alterations in protein-folding pathways, linking folding regulation to tumor suppression. Hsp90 inhibitors have been explored as anticancer agents because they destabilize client kinases and transcription factors. Thus, GO:1903332 is directly relevant to cancer biology and therapeutic targeting.
Cystic fibrosis and CFTR misfolding
Cystic fibrosis is caused by mutations in CFTR that impair folding and trafficking. Type I folding correctors bind CFTR and restore its folding and function, as shown by structural and functional studies. This exemplifies how pharmacological regulation of protein folding can treat genetic disease. Research on GO:1903332 informs corrector development and patient stratification.
Signaling disorders and proteostasis
Protein folding and the regulation of signaling pathways are intimately connected; folding changes can alter signal transduction and contribute to disease. Chaperone network dysfunction is implicated in neurodegeneration and other proteostasis disorders. Understanding folding regulation provides a framework for therapeutic intervention in these conditions.
From regulation of protein folding-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Is a chaperone gene required for folding of a specific client? | CRISPR knockout of HSPA1A or HSP90AA1 followed by client folding assays |
| Does a point mutation in a chaperone ATPase domain alter folding regulation? | Point-mutation knock-in of HSP90AA1 ATPase mutants |
| Can a folding corrector rescue mutant CFTR? | CFTR F508del knock-in cell model with corrector treatment |
| How does codon usage affect co-translational folding? | Overexpression of codon-optimized vs. wild-type constructs with Ribo-seq |
| What is the effect of p53 folding pathway alteration? | TP53 point-mutation knock-in and folding assays |
| Which co-chaperones regulate Hsp70 ATPase cycles? | Knockout of DNAJA1, DNAJB1, or STIP1 with ATPase assays |
How to Study the regulation of protein folding Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Ribo-seq | Ribosome occupancy and elongation rates | Co-translational folding studies |
| Proteomics | Protein abundance and interactions | Chaperone-client network mapping |
| Pulse-chase | Folding and degradation kinetics | CFTR and p53 folding assays |
| Fluorescence microscopy | Protein localization and folding reporters | CFTR trafficking and corrector studies |
| CRISPR knockout screens | Gene requirement for folding | Identification of folding regulators |
| ATPase assays | Chaperone enzymatic activity | Hsp70/Hsp90 regulation studies |
| Codon-usage reporter assays | Translation speed and folding | Codon optimization studies |
Ribosome profiling (Ribo-seq)
Ribo-seq provides global views of translation by mapping ribosome-protected mRNA fragments, revealing elongation rates that influence co-translational folding. It is used to study how codon usage and translation kinetics regulate folding outcomes.
Proteomics and folding assays
Mass spectrometry-based proteomics and pulse-chase folding assays measure protein maturation, aggregation, and chaperone interactions. These methods quantify the effects of folding regulators on client proteins.
Fluorescence and imaging-based folding reporters
Fluorescent folding reporters and imaging can track protein folding and trafficking in live cells, as used to study CFTR correctors. These approaches enable kinetic analysis of folding regulation.
Genetic screens and CRISPR libraries
CRISPR knockout and activation screens identify genes that regulate protein folding and chaperone networks. Library screening coupled with folding reporters can uncover novel regulators of GO:1903332.
How CRISPR Can Be Used to Study GO:1903332 regulation of protein folding
Knockout
CRISPR knockout of chaperone genes such as HSPA1A, HSP90AA1, or co-chaperones enables loss-of-function studies to determine their requirement for client protein folding and cellular proteostasis. Knockout models are widely used to dissect folding networks and stress responses.
Point Mutation
Point-mutation knock-in of catalytic residues in chaperone ATPase domains, such as HSP90AA1, allows precise interrogation of folding regulation mechanisms without altering protein abundance. Similarly, disease-relevant point mutations in CFTR or TP53 can be modeled to study folding defects.
Knock-in
Knock-in of tagged chaperones or folding reporters enables real-time tracking of folding and interactions in native chromatin context. This is valuable for studying co-translational folding and chaperone dynamics.
Overexpression
CRISPR activation or cDNA overexpression of chaperones and co-chaperones can enhance folding capacity and rescue misfolding phenotypes, as shown for CFTR correctors and chaperone networks. Overexpression models are useful for testing sufficiency of folding regulators.
How EDITGENE Supports regulation of protein folding Research
Researchers studying regulation of protein folding-related genes often need to determine whether a candidate gene is causally involved in folding, proteostasis, or disease. EDITGENE provides CRISPR-based cell model services that enable precise genetic manipulation of folding regulators, from knockout to point mutation, knock-in, and overexpression, supported by library screening and bioinformatics.
Contact EDITGENE today to design your custom CRISPR model for regulation of protein folding research.
Frequently Asked Questions About regulation of protein folding
What is GO:1903332 regulation of protein folding?
GO:1903332 is a Gene Ontology biological process term defined as any process that modulates the frequency, rate or extent of protein folding.
What genes are involved in regulation of protein folding?
Key genes include HSPA1A, HSPA8, HSP90AA1, HSP90AB1, HSPD1, CCT subunits, STIP1, DNAJA1, DNAJB1, BAG3, and STUB1, which encode chaperones and co-chaperones.
How do chaperones regulate protein folding?
Chaperones such as Hsp70 and Hsp90 bind unfolded polypeptides and use ATP-dependent cycles to promote folding, prevent aggregation, and mature client proteins.
What is the role of co-translational folding in GO:1903332?
Co-translational folding occurs as the nascent chain emerges from the ribosome, and its regulation is influenced by translation elongation rates and codon usage.
Which diseases are linked to regulation of protein folding?
Cystic fibrosis (CFTR misfolding), cancer (p53 and chaperone networks), and signaling disorders are linked to altered folding regulation.
How can CRISPR be used to study regulation of protein folding?
CRISPR knockout, point mutation, knock-in, and overexpression models allow causal testing of chaperone and folding regulator genes in cells.
What methods study regulation of protein folding?
Ribo-seq, proteomics, pulse-chase assays, fluorescence imaging, and CRISPR screens are commonly used.
What is the Hsp70 chaperone network?
The Hsp70 network is a central folding machinery comprising Hsp70, Hsp40 co-chaperones, and nucleotide exchange factors that regulate protein folding and proteostasis.
How does HSP90 regulate protein folding?
HSP90 is an ATP-dependent chaperone that matures near-native client proteins, especially signaling kinases and transcription factors, and is regulated by co-chaperones.
Can folding correctors treat genetic diseases?
Yes, type I folding correctors can rescue CFTR folding and function, demonstrating pharmacological regulation of protein folding.
Conclusion
GO:1903332 (regulation of protein folding) is a fundamental biological process that governs proteostasis through chaperone and chaperonin networks, co-translational folding, and quality control. Its dysregulation contributes to cancer, cystic fibrosis, and signaling disorders, making it a rich area for therapeutic targeting. Advances in Ribo-seq, proteomics, and CRISPR modeling continue to reveal how folding is regulated and how it can be manipulated. EDITGENE provides comprehensive CRISPR cell model and screening services to accelerate research on this essential process.
References
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- 6. Ingolia NT et al.. 2019. Ribosome Profiling: Global Views of Translation.. Cold Spring Harb Perspect Biol 11(5) PMID: 30037969
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