GO:0016208 AMP binding: Mechanism, Genes and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0016208 AMP binding is a molecular function defined as binding to AMP, adenosine monophosphate.
• AMP binding is central to cellular energy sensing, especially through AMP-activated protein kinase (AMPK) [1,5].
• Structural studies show AMP binds the AMPK gamma subunit via a cystathionine beta-synthase domain, triggering allosteric activation.
• Beyond AMPK, AMP binding regulates NAMPT, glycogen phosphorylase, fructose-1,6-bisphosphatase, and CFTR [3,4,6,7].
• Targeted proteomic methods now enable proteome-wide characterization of AMP-binding capacities of kinases.
• Dysregulated AMP binding contributes to metabolic disorders, cancer, and cystic fibrosis-related pathologies [1,3,7].
Description
GO:0016208 AMP binding is a molecular function ontology term defined as binding to AMP, adenosine monophosphate. AMP is a fundamental nucleotide that serves as a building block of RNA and as a key indicator of cellular energy status. Proteins that bind AMP often act as energy sensors, metabolic enzymes, or regulatory subunits, making this function essential for maintaining cellular homeostasis [1,5]. The term is distinct from ATP or ADP binding and is often studied in the context of allosteric regulation and signal transduction.
AMP binding At A Glance
| GO ID | GO:0016208 |
|---|---|
| GO term | AMP binding |
| Ontology | molecular_function |
| Synonym | none |
| Major function | Binding to AMP, adenosine monophosphate |
| Related nucleotides | ATP, ADP, cAMP |
| Common protein domains | Cystathionine beta-synthase (CBS) domain, nucleotide-binding folds |
| Representative proteins | AMPK gamma subunits, NAMPT, glycogen phosphorylase, fructose-1,6-bisphosphatase |
| Disease relevance | Metabolic disorders, cancer, cystic fibrosis |
What Is GO:0016208?
In simple terms, AMP binding means a protein physically interacts with adenosine monophosphate. According to the QuickGO definition, this molecular function describes the selective and non-covalent interaction between a protein and AMP. This binding can be transient or stable, and it often induces conformational changes that alter protein activity, localization, or interactions with other molecules [5,6].
Why Is AMP binding Important in Cell Biology?
AMP binding is critically important because AMP serves as a universal indicator of low energy status in cells. Proteins that bind AMP often function as energy sensors or metabolic switches, allowing cells to adapt to stress, nutrient deprivation, and hypoxia. Understanding AMP binding mechanisms provides insight into fundamental cellular regulation and offers therapeutic targets for metabolic diseases, cancer, and other disorders [1,3,5].
• AMP binding enables AMPK to sense cellular energy stress and activate catabolic pathways [1,5].
• It regulates NAMPT, a key enzyme in NAD+ biosynthesis, linking energy status to redox metabolism.
• AMP binding to glycogen phosphorylase modulates glycogen breakdown.
• It inhibits fructose-1,6-bisphosphatase, affecting gluconeogenesis.
• AMP binding to CFTR influences ion transport and may contribute to cystic fibrosis pathology.
• Proteome-wide AMP-binding studies reveal new drug targets and regulatory mechanisms.
• Dysregulated AMP binding is implicated in cancer cell metabolism and survival.
• It is essential for maintaining ATP homeostasis during metabolic stress.
• AMP binding can be studied using biophysical, structural, and proteomic methods [2,5].
• Targeting AMP-binding sites offers potential for treating metabolic and proliferative diseases.
Molecular Mechanism of AMP binding
AMP Binding to AMPK Gamma Subunit
In simple terms: AMP fits into a specific pocket on the AMPK gamma subunit, like a key in a lock.
Structural studies have revealed that AMP binds to the cystathionine beta-synthase (CBS) domains of the AMPK gamma subunit. This binding causes conformational changes that protect AMPK from dephosphorylation and allosterically activate the kinase, thereby switching on energy-producing pathways. The binding is highly specific for AMP over ATP, allowing AMPK to respond to increases in the AMP/ATP ratio.
Allosteric Regulation by AMP
In simple terms: When AMP binds, it changes the shape of the protein to make it more active.
AMP binding induces allosteric activation of AMPK by promoting a conformational change in the gamma subunit that enhances kinase activity. This mechanism is crucial for rapid responses to energy stress, as it does not require changes in gene expression. Additionally, AMP binding inhibits the dephosphorylation of Thr172 on the alpha subunit, maintaining AMPK in an active state.
AMP Binding to Metabolic Enzymes
In simple terms: AMP can also stick to enzymes that control sugar and fat metabolism, changing their activity.
Beyond AMPK, AMP binds to enzymes such as glycogen phosphorylase and fructose-1,6-bisphosphatase. For glycogen phosphorylase, AMP binding promotes the active conformation, stimulating glycogen breakdown. In contrast, AMP binding to fructose-1,6-bisphosphatase inhibits its activity, reducing gluconeogenesis. These interactions fine-tune metabolic flux in response to energy status.
AMP Binding to NAMPT
In simple terms: AMP acts as a switch on NAMPT, an enzyme important for making NAD+.
Recent work has shown that NAMPT employs a switch that directly senses AMP/ATP ratios. AMP binding to NAMPT regulates its enzymatic activity and cellular responses to energy stress, linking energy status to NAD+ biosynthesis. This highlights the expanding repertoire of AMP-binding proteins beyond classical energy sensors.
AMP Binding and Ion Channels
In simple terms: AMP can bind to ion channels like CFTR, affecting how ions move across cell membranes.
The ATP-binding cassette (ABC) transporter CFTR possesses separate binding sites for ATP and AMP. AMP binding mutually influences ATP interaction and modulates channel activity, suggesting a role in ion transport regulation. This expands the functional scope of AMP binding to membrane transport processes.
Key Genes Involved in GO:0016208 AMP binding
The following genes encode proteins that directly bind AMP and are central to the study of GO:0016208.
| Gene | Major Role | Research Relevance |
|---|---|---|
| PRKAA1 | AMPK catalytic alpha-1 subunit | Energy sensing, phosphorylation of metabolic targets [1,5] |
| PRKAA2 | AMPK catalytic alpha-2 subunit | Energy sensing, isoform-specific functions [1,5] |
| PRKAB1 | AMPK beta-1 subunit | Scaffolding and AMP binding regulation |
| PRKAB2 | AMPK beta-2 subunit | Scaffolding and AMP binding regulation |
| PRKAG1 | AMPK gamma-1 subunit | Direct AMP binding, allosteric activation |
| PRKAG2 | AMPK gamma-2 subunit | Direct AMP binding, cardiac energy sensing |
| PRKAG3 | AMPK gamma-3 subunit | Direct AMP binding, muscle energy sensing |
| NAMPT | NAD+ biosynthesis enzyme | AMP/ATP sensing switch, energy stress responses |
| PYGL | Glycogen phosphorylase, liver isoform | AMP binding modulates glycogenolysis |
| PYGM | Glycogen phosphorylase, muscle isoform | AMP binding modulates glycogenolysis |
| FBP1 | Fructose-1,6-bisphosphatase 1 | AMP binding inhibits gluconeogenesis |
| CFTR | Cystic fibrosis transmembrane conductance regulator | AMP binding modulates ion transport |
| AK1 | Adenylate kinase 1 | AMP binding in nucleotide metabolism |
| AK2 | Adenylate kinase 2 | AMP binding in mitochondrial energy homeostasis |
| PFKM | Phosphofructokinase, muscle | AMP binding regulates glycolysis |
| GNAS | G protein subunit alpha s | Indirect AMP binding via cAMP signaling |
| EPAS1 | Endothelial PAS domain protein 1 | Hypoxia response, potential AMP-binding kinase target |
How Is AMP binding Regulated?
AMP binding is regulated by the intracellular AMP/ATP ratio. Under energy stress, AMP levels rise, promoting binding to AMPK and other targets. This binding is antagonized by ATP, which competes for the same or overlapping sites. Additionally, post-translational modifications and protein-protein interactions can modulate AMP binding affinity. The NAMPT switch directly senses AMP/ATP, further illustrating the dynamic regulation of this function.
AMP binding and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| PRKAG2 | Cardiac glycogen storage, Wolff-Parkinson-White syndrome | Knock-in mouse with point mutation in AMP-binding domain |
| NAMPT | Metabolic disorders, cancer | Knockout cell line, overexpression of AMP-binding mutant |
| CFTR | Cystic fibrosis | Point mutation at AMP-binding site, knock-in mouse |
| PYGL | Glycogen storage disease type VI | Knockout hepatocytes, point mutation |
| FBP1 | Fructose-1,6-bisphosphatase deficiency | Knockout cell line, AMP-binding mutant overexpression |
Metabolic Disorders
Dysregulated AMP binding to AMPK is linked to obesity, type 2 diabetes, and metabolic syndrome. Impaired AMP sensing leads to defective energy homeostasis and insulin resistance [1,5]. Targeting AMP-binding sites on AMPK or NAMPT may offer therapeutic strategies.
Cancer
Cancer cells often reprogram metabolism to support growth. AMPK, activated by AMP binding, can either suppress or promote tumorigenesis depending on context. Loss of AMP binding may contribute to metabolic flexibility and chemoresistance. NAMPT, regulated by AMP/ATP sensing, is also implicated in cancer cell survival.
Cystic Fibrosis
CFTR, the protein mutated in cystic fibrosis, binds AMP at a site distinct from ATP. AMP binding influences CFTR channel activity and may modulate disease severity. Understanding this interaction could inform new therapeutic approaches.
Glycogen Storage Diseases
Mutations affecting AMP binding to glycogen phosphorylase can alter enzyme activity and contribute to glycogen storage disorders. AMP binding is essential for proper regulation of glycogen breakdown.
From AMP binding-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does AMP binding to AMPK gamma subunit regulate energy stress response? | Knockout of PRKAG1/2/3, point mutation in CBS domain |
| How does AMP binding to NAMPT affect NAD+ levels? | Knock-in of AMP-binding deficient NAMPT, overexpression |
| What is the role of AMP binding in glycogen phosphorylase? | Point mutation of AMP-binding site in PYGL/PYGM |
| Does AMP binding to CFTR modulate ion transport? | Knock-in of CFTR AMP-binding mutant, patch clamp |
| Can proteome-wide AMP binding identify new drug targets? | Overexpression of kinases, targeted proteomics |
| What are the structural determinants of AMP binding? | Tagged knock-in for cryo-EM, X-ray crystallography |
How to Study the AMP binding Process
| Method | What It Measures | Typical Application |
|---|---|---|
| X-ray crystallography | Atomic structure of AMP-protein complex | Determine binding mode and conformational changes |
| Cryo-EM | Near-atomic structure of large complexes | Study AMPK in different nucleotide states |
| Targeted proteomics | Proteome-wide AMP-binding capacity | Identify new AMP-binding kinases |
| Isothermal titration calorimetry | Binding affinity and thermodynamics | Quantify AMP binding to purified proteins |
| Raman spectroscopy | Vibrational modes of AMP-metal complexes | Study Fe(III)-AMP binding |
| Kinase activity assay | Phosphorylation of substrates | Measure AMPK activation by AMP |
| Ion transport assay | Channel activity | Assess CFTR regulation by AMP |
| NAD+ quantification | Cellular NAD+ levels | Evaluate NAMPT regulation by AMP/ATP |
Structural Biology
X-ray crystallography and cryo-EM have been used to solve the structure of AMP bound to AMPK, revealing the CBS domain binding pocket and conformational changes. These methods provide atomic-level detail of AMP binding.
Targeted Proteomics
Targeted proteomic approaches enable proteome-wide characterization of AMP-binding capacities of kinases. This method uses chemical probes or affinity enrichment followed by mass spectrometry to identify AMP-binding proteins.
Biophysical Assays
Isothermal titration calorimetry (ITC) and surface plasmon resonance (SPR) can measure binding affinity and thermodynamics of AMP-protein interactions. Raman spectroscopy has been used to study Fe(III)-AMP binding.
Functional Assays
Kinase activity assays, glycogen phosphorylase activity assays, and ion transport measurements can assess the functional consequences of AMP binding. For example, AMPK activity is measured by phosphorylation of downstream substrates.
How CRISPR Can Be Used to Study GO:0016208 AMP binding
Knockout
CRISPR knockout of genes encoding AMP-binding proteins, such as PRKAG1 or NAMPT, can reveal their essential roles in energy sensing and metabolism. Knockout cell lines are valuable for studying loss-of-function phenotypes [1,3].
Point Mutation
Introducing point mutations in the AMP-binding domain (e.g., in PRKAG2 or CFTR) allows precise dissection of binding versus other functions. This is critical for understanding allosteric regulation [5,7].
Knock-in
Knock-in of tagged or mutant versions of AMP-binding proteins (e.g., GFP-tagged AMPK) enables live-cell imaging and biochemical purification. This helps track localization and interactions.
Overexpression
Overexpression of wild-type or mutant AMP-binding proteins can amplify signaling pathways and facilitate drug screening. It is useful for studying gain-of-function effects.
How EDITGENE Supports AMP binding Research
Researchers studying AMP binding-related genes often need to determine whether a candidate gene is causally involved in energy sensing, metabolic regulation, or disease. EDITGENE provides comprehensive CRISPR services to create precisely engineered cell models for such investigations.
Contact EDITGENE today to design your custom CRISPR model for AMP binding research.
Related Products
| Product name | Cat.No. | Species | Gene ID | |
|---|---|---|---|---|
| PRKAG1 Knockout HEK293 Cell Line | EDJ-KQ1449 | Human | 5571 | Details Get a Quote |
| PRKAG3 Knockout HEK293 Cell Line | EDJ-KQ1450 | Human | 53632 | Details Get a Quote |
| PRKAG2 Knockout HEK293 Cell Line | EDJ-KQ1451 | Human | 51422 | Details Get a Quote |
| FBP1 Knockout HEK293 Cell Line | EDJ-KQ1863 | Human | 2203 | Details Get a Quote |
| APRT Knockout HEK293 Cell Line | EDJ-KQ4073 | Human | 353 | Details Get a Quote |
| MPPED2 Knockout HEK293 Cell Line | EDJ-KQ4167 | Human | 744 | Details Get a Quote |
| PYGL Knockout HEK293 Cell Line | EDJ-KQ5618 | Human | 5836 | Details Get a Quote |
| CFAP45 Knockout HEK293 Cell Line | EDJ-KQ7542 | Human | 25790 | Details Get a Quote |
| ACSS1 Knockout HEK293 Cell Line | EDJ-KQ10114 | Human | 84532 | Details Get a Quote |
| AK8 Knockout HEK293 Cell Line | EDJ-KQ11569 | Human | 158067 | Details Get a Quote |
| ACSS2 Knockout HEK293 Cell Line | EDJ-KQ12270 | Human | 55902 | Details Get a Quote |
| PRKAG1 Knockout A-549 Cell Line | EDJ-KQ21001 | Human | 5571 | Details Get a Quote |
| PRKAG1 Knockout HCT 116 Cell Line | EDJ-KQ21002 | Human | 5571 | Details Get a Quote |
| PRKAG1 Knockout HeLa Cell Line | EDJ-KQ21003 | Human | 5571 | Details Get a Quote |
| PRKAG2 Knockout A-549 Cell Line | EDJ-KQ21004 | Human | 51422 | Details Get a Quote |
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Frequently Asked Questions About AMP binding
What is AMP binding?
AMP binding is a molecular function (GO:0016208) defined as the selective interaction between a protein and adenosine monophosphate, often regulating energy sensing and metabolism.
What genes are involved in AMP binding?
Key genes include PRKAA1, PRKAA2, PRKAB1, PRKAB2, PRKAG1, PRKAG2, PRKAG3, NAMPT, PYGL, PYGM, FBP1, and CFTR [1,3,4,5,6,7].
How does AMP binding regulate AMPK?
AMP binds to the gamma subunit of AMPK, causing allosteric activation and protecting against dephosphorylation, thereby switching on energy-producing pathways [1,5].
What diseases are associated with AMP binding?
Dysregulated AMP binding is linked to metabolic disorders, cancer, cystic fibrosis, and glycogen storage diseases [1,3,6,7].
What methods are used to study AMP binding?
Structural biology (X-ray crystallography, cryo-EM), targeted proteomics, biophysical assays (ITC, SPR), and functional kinase assays are commonly used [2,5,6,8].
Can CRISPR be used to study AMP binding?
Yes, CRISPR knockout, point mutation, knock-in, and overexpression models enable precise dissection of AMP-binding protein functions [1,3,5].
What is the role of AMP binding in NAMPT?
NAMPT employs a switch that directly senses AMP/ATP, regulating NAD+ biosynthesis and cellular responses to energy stress.
How does AMP binding affect glycogen phosphorylase?
AMP binding promotes the active conformation of glycogen phosphorylase, stimulating glycogen breakdown.
Is AMP binding specific to AMPK?
No, AMP binds to various proteins including NAMPT, glycogen phosphorylase, fructose-1,6-bisphosphatase, and CFTR [3,4,6,7].
What is the clinical relevance of AMP binding?
Targeting AMP-binding sites offers therapeutic potential for metabolic diseases, cancer, and cystic fibrosis [1,3,7].
Conclusion
GO:0016208 AMP binding is a fundamental molecular function that underpins cellular energy sensing and metabolic regulation. From AMPK to NAMPT, glycogen phosphorylase, and CFTR, AMP binding proteins play diverse and critical roles in health and disease. Advances in structural biology, proteomics, and CRISPR engineering continue to illuminate the mechanisms and therapeutic potential of AMP binding.
References
- 1. Zhang CS et al.. 2017. Fructose-1,6-bisphosphate and aldolase mediate glucose sensing by AMPK.. Nature 548(7665):112-116 PMID: 28723898
- 2. Miao W et al.. 2022. Targeted Proteomic Approaches for Proteome-Wide Characterizations of the AMP-Binding Capacities of Kinases.. J Proteome Res 21(8):2063-2070 PMID: 35820187
- 3. Zu Y et al.. 2025. The NAMPT enzyme employs a switch that directly senses AMP/ATP and regulates cellular responses to energy stress.. Mol Cell 85(12):2271-2286.e6 PMID: 40505662
- 4. Han X et al.. 2016. New insight into the binding modes of TNP-AMP to human liver fructose-1,6-bisphosphatase.. Spectrochim Acta A Mol Biomol Spectrosc 165:155-160 PMID: 27137358
- 5. Xiao B et al.. 2007. Structural basis for AMP binding to mammalian AMP-activated protein kinase.. Nature 449(7161):496-500 PMID: 17851531
- 6. Mateo PL et al.. 1986. Thermodynamics of the binding of AMP to glycogen phosphorylase a.. J Biol Chem 261(36):17067-72 PMID: 3097020
- 7. Randak CO et al.. 2013. ATP and AMP mutually influence their interaction with the ATP-binding cassette (ABC) adenylate kinase cystic fibrosis transmembrane conductance regulator (CFTR) at separate binding sites.. J Biol Chem 288(38):27692-27701 PMID: 23921386
- 8. Zhelyaskov V et al.. 1992. A Raman study of the binding of Fe(III) to ATP and AMP.. Biochem J 287 ( Pt 2)(Pt 2):561-6 PMID: 1445215
