GO:0140662 ATP-dependent protein folding chaperone: Mechanism, Genes and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0140662 ATP-dependent protein folding chaperone describes a molecular function in which a protein binds a target protein or protein complex and uses ATP hydrolysis to drive its folding.
• The term is defined by coupling to ATP hydrolysis, distinguishing it from ATP-independent holdases and from passive binding activities.
• Major protein families carrying this function include the HSP70 system with J-protein co-chaperones, the chaperonins Hsp60/GroEL and TRiC/CCT, and mitochondrial AAA+ proteases such as LONP1.
• Chaperonins form large double-ring chambers that encapsulate substrate proteins and undergo ATP-driven conformational cycles to promote folding.
• Loss of ATP-dependent chaperone function is linked to protein-misfolding diseases including neurodegeneration, mitochondrial dysfunction, and beta cell failure in type 2 diabetes.
• CRISPR knockout, point-mutation, knock-in, and overexpression models allow causal testing of chaperone genes in folding-related phenotypes.
Description
GO:0140662 ATP-dependent protein folding chaperone is a molecular function term that captures a central activity of the cell: the use of ATP hydrolysis to assist proteins in reaching their native three-dimensional structures. Protein folding is not spontaneous for many polypeptides; aggregation-prone intermediates must be protected and guided, and ATP-dependent chaperones provide the energy and binding surfaces required for this process. The term therefore describes a binding-to-protein activity that is mechanistically coupled to ATP consumption, rather than a passive interaction. This function is essential across compartments. In the cytosol, the HSP70 chaperone machinery uses J proteins to select substrates and ATP to drive cycles of binding and release. In mitochondria, chaperonins and AAA+ proteases such as LONP1 maintain proteostasis and respond to folding stress. In the eukaryotic cytosol, the chaperonin TRiC/CCT folds actin and tubulin, and its ATP-dependent cycle has been visualized in structural detail. Because so many cellular pathways depend on correctly folded proteins, ATP-dependent protein folding chaperones are studied in cancer, neurodegeneration, metabolic disease, and mitochondrial disorders. For researchers, GO:0140662 provides a precise annotation target when assigning function to genes that bind proteins and hydrolyze ATP to promote folding. It is distinct from ATP-independent chaperone activity and from proteolytic functions, although some AAA+ enzymes combine chaperone-like and protease activities. Understanding this term helps interpret gene ontology enrichment, design functional assays, and build CRISPR models that test causality.
ATP-dependent protein folding chaperone At A Glance
| GO ID | GO:0140662 |
|---|---|
| GO term | ATP-dependent protein folding chaperone |
| Ontology | molecular_function |
| Synonym | None listed in QuickGO |
| Definition | Binding to a protein or a protein-containing complex to assist the protein folding process, driven by ATP hydrolysis. |
| Major function | ATP-hydrolysis-coupled binding to protein substrates to promote folding and prevent aggregation |
| Representative families | HSP70/J-protein system, chaperonins (Hsp60/GroEL, TRiC/CCT), mitochondrial AAA+ chaperones such as LONP1 |
| Cellular contexts | Cytosol, mitochondria, and other compartments where protein folding stress occurs |
| Related disease areas | Neurodegeneration, mitochondrial disease, type 2 diabetes, cancer |
What Is GO:0140662?
In simple terms, GO:0140662 ATP-dependent protein folding chaperone means a protein binds another protein or a protein-containing complex and uses the energy from ATP hydrolysis to help that target fold correctly. The QuickGO definition states: Binding to a protein or a protein-containing complex to assist the protein folding process, driven by ATP hydrolysis. This function is a molecular_function in the Gene Ontology. It requires two coupled features: substrate binding to a protein or protein complex, and ATP hydrolysis that powers conformational changes or substrate release. It does not describe ATP-independent holdases, which bind but do not hydrolyze ATP, nor does it describe proteases unless they also assist folding.
Why Is ATP-dependent protein folding chaperone Important in Cell Biology?
ATP-dependent protein folding chaperones are important because they convert chemical energy into folding assistance, allowing cells to maintain proteostasis under normal and stress conditions. Without this function, newly synthesized polypeptides and stress-denatured proteins can aggregate, impairing organelle function and triggering disease. The function is also central to the mechanism of action of major chaperone families, including the HSP70 system and chaperonins, which are among the most conserved protein-folding machines in biology. Because ATP hydrolysis is required, this activity is metabolically expensive and tightly regulated, making it a sensitive indicator of cellular stress and a compelling target for mechanistic and therapeutic research.
• Maintains proteostasis by preventing aggregation of folding intermediates.
• Powers the HSP70/J-protein system that selects and folds diverse client proteins.
• Enables chaperonin chambers such as TRiC/CCT to fold actin, tubulin, and other essential proteins.
• Supports mitochondrial protein quality control through chaperones and AAA+ enzymes such as LONP1.
• Is implicated in beta cell failure in type 2 diabetes through mitochondrial folding stress.
• Provides a mechanistic basis for understanding neurodegeneration linked to protein misfolding.
• Is a conserved function across bacteria, archaea, and eukaryotes, including GroEL/GroES and Hsp60 systems.
• Can be visualized in situ by cryo-electron tomography, linking structure to function.
• Is a target for functional genomics and CRISPR screens that test folding-related phenotypes.
• Helps interpret GO enrichment and molecular-function annotations in omics datasets.
What Happens During ATP-dependent protein folding chaperone?
Substrate recognition and binding
In simple terms: The chaperone first grabs the unfolded or partially folded protein.
ATP-dependent chaperones begin by binding exposed hydrophobic segments of a target protein or protein complex. In the HSP70 system, J proteins act as drivers of functional specificity by delivering substrates to HSP70. This binding step is ATP-independent in the sense that it does not require hydrolysis, but it sets up the subsequent ATP-driven cycle. Chaperonins such as TRiC/CCT recognize specific clients, including actin and tubulin, through interactions with their substrate-binding domains.
ATP hydrolysis and conformational cycling
In simple terms: ATP is burned to change the chaperone's shape and release or encapsulate the protein.
ATP hydrolysis drives conformational changes in the chaperone that alter its affinity for the substrate. In the HSP70 machinery, ATP binding and hydrolysis cycle the chaperone between substrate-bound and substrate-released states, allowing iterative folding attempts. Chaperonins undergo large ATP-dependent conformational transitions that close a folding chamber around the substrate. Structural visualization of the tubulin folding pathway directed by human TRiC/CCT has revealed how ATP-driven motions coordinate substrate encapsulation and folding.
Chamber formation and folding
In simple terms: Some chaperones build a protected room where the protein can fold safely.
Group I chaperonins such as GroEL/GroES and their mitochondrial homologs form double-ring structures with a central cavity that encapsulates substrate proteins. ATP binding and hydrolysis drive the co-chaperonin lid to close the chamber, creating an isolated environment that prevents aggregation. Cryo-electron tomography has visualized chaperonin function in situ, showing how these machines operate within cells. The eukaryotic chaperonin TRiC/CCT uses a similar ATP-dependent mechanism to fold essential cytoskeletal proteins.
Substrate release and iterative folding
In simple terms: The protein is released, and if it is not folded yet, the cycle repeats.
After ATP hydrolysis and chamber opening, the substrate is released. If folding is incomplete, the chaperone can rebind and run additional cycles, consuming more ATP. This iterative mechanism allows ATP-dependent chaperones to assist folding of proteins that cannot fold spontaneously. The energy cost of repeated cycles reflects the high demand for proteostasis in metabolically active cells.
Coordination with co-chaperones and proteases
In simple terms: Helper proteins and quality-control enzymes decide whether the protein folds or is degraded.
Co-chaperones and co-chaperonins modulate ATP-dependent chaperone activity and substrate selection. In mitochondria, AAA+ enzymes such as LONP1 combine chaperone-like recognition with proteolytic removal of irreversibly misfolded proteins, and LONP1 regulation of mitochondrial protein folding has been linked to beta cell failure in type 2 diabetes. This coordination ensures that proteins that cannot be folded are degraded rather than allowed to aggregate.
Key Genes Involved in GO:0140662 ATP-dependent protein folding chaperone
The following genes and protein families represent major carriers of ATP-dependent protein folding chaperone activity across cellular compartments.
| Gene | Major Role | Research Relevance |
|---|---|---|
| HSPA1A | Cytosolic HSP70 that binds substrates and uses ATP to drive folding cycles | Core model for ATP-dependent chaperone mechanism and stress response |
| HSPA8 | Constitutively expressed HSP70 involved in protein folding and trafficking | Studied in proteostasis and chaperone-mediated autophagy contexts |
| DNAJB1 | J-protein co-chaperone that stimulates HSP70 ATPase activity and substrate delivery | Key for understanding functional specificity of the HSP70 system |
| HSPD1 | Mitochondrial Hsp60 chaperonin subunit that forms folding chambers | Model for mitochondrial proteostasis and chaperonin assembly |
| HSPE1 | Co-chaperonin Hsp10 that caps the Hsp60 chamber | Used to study co-chaperonin interactions and ATP-driven lid closure |
| CCT1 (TCP1) | Subunit of the eukaryotic chaperonin TRiC/CCT | Central to actin and tubulin folding studies |
| CCT2 | Subunit of TRiC/CCT involved in substrate encapsulation | Target for structural and functional analysis of chaperonin cycling |
| CCT3 | Subunit of TRiC/CCT with ATP-dependent conformational roles | Used in cryo-EM and folding pathway studies |
| CCT4 | Subunit of TRiC/CCT contributing to substrate binding | Relevant to cytoskeletal folding and cell cycle research |
| CCT5 | Subunit of TRiC/CCT involved in chamber formation | Model for chaperonin-dependent folding of tubulin |
| CCT6A | Subunit of TRiC/CCT with ATPase activity | Studied in folding pathway visualization |
| CCT7 | Subunit of TRiC/CCT required for client folding | Used in structural and biochemical chaperonin assays |
| CCT8 | Subunit of TRiC/CCT that completes the ring | Relevant to assembly and function of the chaperonin complex |
| LONP1 | Mitochondrial AAA+ protease with chaperone-like roles in protein folding quality control | Linked to beta cell failure in type 2 diabetes and mitochondrial stress |
| GROEL (bacterial) | Group I chaperonin that encapsulates substrates in an ATP-dependent manner | Classic model for chaperonin mechanism and co-chaperonin interactions |
| GROES (bacterial) | Co-chaperonin lid that closes the GroEL chamber | Used to study ATP-driven chamber cycling |
| HSPA9 (mtHsp70) | Mitochondrial HSP70 involved in protein import and folding | Relevant to mitochondrial proteostasis research |
How Is ATP-dependent protein folding chaperone Regulated?
ATP-dependent protein folding chaperone activity is regulated at multiple levels. Substrate selection and ATPase stimulation depend on co-chaperones such as J proteins in the HSP70 system. Co-chaperonins regulate chaperonin chamber closure and cycling. In mitochondria, LONP1 regulation of protein folding responds to organellar stress and metabolic state, and its dysfunction has been linked to beta cell failure in type 2 diabetes. Because ATP hydrolysis is the driving force, cellular energy status and stress signaling indirectly control the rate of chaperone cycles. The concept of chaperones as chaotropes also highlights that their activity can be modulated by the physicochemical environment and client properties.
ATP-dependent protein folding chaperone and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| LONP1 | Beta cell failure in type 2 diabetes and mitochondrial protein folding stress | Knockout or point-mutation in beta cell lines with mitochondrial stress assays |
| HSPA1A | Proteostasis and stress response in cancer and neurodegeneration | Overexpression and knockout in stress-challenged cell models |
| DNAJB1 | HSP70 functional specificity in protein folding disease | Point mutation of J-domain to test ATPase stimulation |
| HSPD1 | Mitochondrial chaperonin dysfunction | Knockout in mitochondrial reporter cell lines |
| CCT subunits | Cytoskeletal folding defects and proliferation | Tagged knock-in for structural and interaction studies |
Neurodegeneration and protein misfolding
ATP-dependent protein folding chaperones protect against aggregation of misfolded proteins, and failure of this function is a recurring theme in neurodegenerative disease. The HSP70 system and chaperonins are central to maintaining neuronal proteostasis, and their ATP-dependent cycles determine whether misfolded proteins are refolded or targeted for degradation. Because chaperone capacity declines with stress and aging, neurons are particularly vulnerable to folding defects.
Mitochondrial disease and metabolic dysfunction
Mitochondria depend on ATP-dependent chaperones and AAA+ proteases to maintain their proteome. LONP1 regulation of mitochondrial protein folding provides insight into beta cell failure in type 2 diabetes, linking chaperone dysfunction to metabolic disease. Mitochondrial chaperonins such as Hsp60/Hsp10 are also required for folding of imported proteins, and their impairment affects organellar function.
Cancer and chaperone addiction
Cancer cells often depend heavily on ATP-dependent chaperones to cope with high rates of protein synthesis and stress. The HSP70 machinery supports folding of oncogenic proteins and survival under proteotoxic stress, making it a target of interest in cancer research. Chaperonin TRiC/CCT is also essential for folding cytoskeletal proteins required for proliferation, and its ATP-dependent cycle has been structurally characterized.
From ATP-dependent protein folding chaperone-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Is the gene required for ATP-dependent folding of a specific client? | CRISPR knockout cell line with client-folding reporter |
| Does a disease-associated variant alter ATPase-coupled chaperone activity? | Point-mutation knock-in of the variant |
| Where does the chaperone localize and interact in cells? | Tagged knock-in with fluorescent or affinity tag |
| Does increased chaperone dosage rescue folding stress? | Overexpression cell model |
| Which co-chaperones are required for the folding cycle? | Knockout of co-chaperone genes followed by proteomics |
| How does mitochondrial folding stress affect metabolism? | Knockout or point-mutation in mitochondrial disease models |
How to Study the ATP-dependent protein folding chaperone Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Cryo-electron microscopy | High-resolution chaperone and chaperonin structures | Visualizing ATP-dependent conformational cycles |
| Cryo-electron tomography | Chaperonin function in situ | Native cellular context of folding machines |
| ATPase assay | Rate of ATP hydrolysis by chaperones | Testing co-chaperone stimulation and mutants |
| Affinity proteomics | Substrate and co-chaperone interactions | Mapping client networks |
| Aggregation assay | Prevention of protein misfolding | Evaluating chaperone protective function |
| Fluorescence imaging | Localization and dynamics of tagged chaperones | Live-cell folding studies |
| Mitochondrial stress assay | Organelle function under folding stress | Linking chaperones to metabolic phenotypes |
| CRISPR functional screen | Genes required for folding-related phenotypes | Identifying chaperone dependencies |
Structural and biophysical methods
Cryo-electron microscopy and cryo-electron tomography have been used to visualize chaperonin function in situ and the TRiC/CCT-directed tubulin folding pathway. These methods reveal ATP-dependent conformational changes and chamber formation that define GO:0140662. Biochemical ATPase assays complement structural work by measuring hydrolysis rates in the presence of substrate.
Proteomics and interactomics
Affinity purification and mass spectrometry identify substrates and co-chaperones of ATP-dependent chaperones. Proteomics can detect changes in folding intermediates and aggregation when chaperone function is perturbed. These approaches help assign GO:0140662 activity to specific gene products.
Functional folding assays
Reporter-based folding assays and aggregation assays measure whether a chaperone can prevent misfolding and promote native structure. In mitochondria, oxygen consumption and stress markers can be combined with folding readouts to link chaperone activity to organelle function. Such assays are essential for testing causality in CRISPR models.
Imaging and live-cell analysis
Fluorescence imaging of tagged chaperones and substrates allows tracking of folding cycles in living cells. Cryo-electron tomography provides near-native views of chaperonin machines in action. These methods connect molecular function to cellular context.
How CRISPR Can Be Used to Study GO:0140662 ATP-dependent protein folding chaperone
Knockout
CRISPR knockout of genes encoding ATP-dependent chaperones or their co-chaperones can reveal whether the function is essential for folding of specific clients. For example, knocking out HSP70 family members or J proteins tests their role in substrate folding and stress survival. Knockout of LONP1 can be used to model mitochondrial folding stress and metabolic dysfunction.
Point Mutation
Point-mutation knock-in allows precise testing of ATPase domains, substrate-binding residues, and disease-associated variants. Mutating the J-domain of DNAJB1, for instance, can dissect its role in stimulating HSP70 ATP hydrolysis. Point mutations in mitochondrial chaperones can model folding defects linked to disease.
Knock-in
Tagged knock-in of chaperone genes enables visualization and interaction studies without overexpression artifacts. Fluorescent or affinity tags can be inserted into endogenous loci to track ATP-dependent folding cycles in real time. This approach is valuable for studying chaperonin assembly and localization.
Overexpression
Overexpression of ATP-dependent chaperones can test whether increased folding capacity rescues stress or disease phenotypes. It is also used to produce sufficient protein for biochemical and structural assays. Controlled overexpression systems help distinguish dosage effects from loss-of-function mechanisms.
How EDITGENE Supports ATP-dependent protein folding chaperone Research
Researchers studying ATP-dependent protein folding chaperone-related genes often need to determine whether a candidate gene is causally involved in folding, stress resistance, or disease phenotypes. Establishing causality requires precise genetic models that can remove, modify, tag, or overexpress the gene of interest in relevant cell types. EDITGENE provides these models together with screening and bioinformatics support to accelerate mechanistic discovery.
Contact EDITGENE today to design your custom CRISPR model for ATP-dependent protein folding chaperone research.
Frequently Asked Questions About ATP-dependent protein folding chaperone
What is GO:0140662 ATP-dependent protein folding chaperone?
It is a Gene Ontology molecular function describing binding to a protein or protein-containing complex to assist folding, driven by ATP hydrolysis.
What genes are involved in ATP-dependent protein folding chaperone activity?
Major genes include HSPA1A, HSPA8, DNAJB1, HSPD1, HSPE1, CCT subunits, LONP1, and bacterial GroEL/GroES.
How does ATP hydrolysis help protein folding?
ATP hydrolysis drives conformational changes in the chaperone that alter substrate affinity, enable chamber closure, and allow iterative folding cycles.
What is the difference between ATP-dependent and ATP-independent chaperones?
ATP-dependent chaperones use ATP hydrolysis to cycle substrates, while ATP-independent holdases bind and protect without consuming ATP.
Which chaperonin folds actin and tubulin?
The eukaryotic chaperonin TRiC/CCT folds actin and tubulin through an ATP-dependent mechanism.
How is LONP1 related to protein folding and diabetes?
LONP1 regulates mitochondrial protein folding, and its dysfunction provides insight into beta cell failure in type 2 diabetes.
What methods are used to study ATP-dependent protein folding chaperones?
Cryo-electron microscopy, cryo-electron tomography, ATPase assays, proteomics, imaging, and CRISPR screens are commonly used.
Can CRISPR knockout be used to study chaperone function?
Yes, knockout cell lines can test whether a chaperone gene is required for folding of specific clients and stress survival.
Why are chaperonins important in mitochondria?
Mitochondrial chaperonins such as Hsp60/Hsp10 fold imported proteins and maintain organellar proteostasis.
What diseases are linked to ATP-dependent chaperone dysfunction?
Neurodegeneration, mitochondrial disease, type 2 diabetes, and cancer have been linked to chaperone dysfunction.
Conclusion
GO:0140662 ATP-dependent protein folding chaperone defines a mechanistically distinct molecular function in which ATP hydrolysis powers the assistance of protein folding. The function is carried out by conserved machines including the HSP70/J-protein system, chaperonins such as Hsp60/GroEL and TRiC/CCT, and mitochondrial AAA+ enzymes like LONP1. Its importance spans proteostasis, stress responses, and human disease, making it a rich area for structural, biochemical, and genetic research. CRISPR-based models provide a direct route to test causality for chaperone genes in folding-related phenotypes. By combining knockout, point-mutation, knock-in, overexpression, and screening approaches, researchers can dissect how ATP-dependent chaperones recognize substrates, cycle through conformational states, and protect cells from misfolding disease.
References
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