GO:0061577 calcium ion transmembrane transport via high voltage-gated calcium channel: Mechanism, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0061577 describes calcium ion transport across a membrane specifically through high voltage-gated calcium channels, also known as L-type calcium channels.
• High voltage-gated calcium channels are multi-subunit complexes; the pore-forming α1 subunit (e.g., CACNA1C, CACNA1D) opens in response to strong membrane depolarization to allow Ca2+ influx.
• This process is essential for excitation-contraction coupling, hormone secretion, and gene expression regulation in excitable cells.
• Dysregulation of high voltage-gated calcium channels is linked to disorders such as pancreatic β-cell dysfunction, cardiac arrhythmias, and certain cancers.
• Research on GO:0061577 employs electrophysiology, Ca2+ imaging, and CRISPR-based gene editing to dissect channel function.
• The term is distinct from other calcium transport processes because it explicitly requires a high voltage-gated calcium channel, not other calcium channels or transporters.
Description
Calcium ions (Ca2+) are universal second messengers that control a vast array of cellular processes, from muscle contraction to neurotransmitter release. One of the most precisely regulated routes for Ca2+ entry into cells is through high voltage-gated calcium channels, a process formally annotated as GO:0061577 (calcium ion transmembrane transport via high voltage-gated calcium channel). These channels open only upon strong membrane depolarization, ensuring that Ca2+ influx is tightly coupled to electrical activity. This GO term captures the specific molecular event of Ca2+ translocation across a membrane mediated by these channels, distinguishing it from other calcium transport mechanisms such as store-operated calcium entry or low voltage-activated (T-type) channel activity. For researchers, GO:0061577 provides a precise functional handle to study how excitable cells convert electrical signals into biochemical responses. High voltage-gated calcium channels are composed of a pore-forming α1 subunit and auxiliary β, α2δ, and γ subunits, each contributing to channel trafficking, gating, and modulation. The physiological importance of this process is underscored by its role in insulin secretion from pancreatic β-cells, cardiac action potential prolongation, and neuronal gene expression. Moreover, mutations or altered expression of these channels are implicated in diseases ranging from diabetes to cancer, making GO:0061577 a focal point for both basic and translational research. Understanding GO:0061577 requires integrating structural biology, electrophysiology, and genetic manipulation. Recent studies have elucidated how auxiliary subunits fine-tune channel properties and how post-translational modifications regulate channel activity. In this article, we synthesize authoritative QuickGO annotations and verified PubMed literature to provide a comprehensive overview of the genes, mechanisms, and experimental models relevant to this process.
calcium ion transmembrane transport via high voltage-gated calcium channel At A Glance
| GO ID | GO:0061577 |
|---|---|
| GO term | calcium ion transmembrane transport via high voltage-gated calcium channel |
| Ontology | biological_process |
| Synonym | generation of L-type calcium current |
| Major function | Mediates Ca2+ influx in response to strong membrane depolarization, coupling electrical signals to cellular responses such as contraction, secretion, and gene expression. |
| Cellular location | Plasma membrane of excitable cells (e.g., neurons, cardiac myocytes, pancreatic β-cells). |
| Key subunits | Pore-forming α1 subunit (CACNA1C, CACNA1D, etc.) and auxiliary β, α2δ, γ subunits. |
| Voltage dependence | Activation threshold typically around -40 to -30 mV; requires strong depolarization. |
| Regulatory modifiers | Phosphorylation, calmodulin, G-proteins, and pyridine nucleotides. |
What Is GO:0061577?
GO:0061577 is a biological process term defined as the transport of a calcium ion from one side of a membrane to the other specifically through a high voltage-gated calcium channel. This definition emphasizes two key constraints: the ion must be calcium, and the transport must be mediated by a channel that activates at high voltages (typically above -40 mV). The synonym 'generation of L-type calcium current' reflects the fact that high voltage-gated calcium channels are often referred to as L-type channels in electrophysiological contexts. Unlike generic calcium transport, this term excludes other calcium-permeable channels such as T-type, N-type, or store-operated channels, and it does not cover calcium pumps or exchangers.
Why Is calcium ion transmembrane transport via high voltage-gated calcium channel Important in Cell Biology?
GO:0061577 is critically important because high voltage-gated calcium channels are the primary route for Ca2+ entry in many excitable cells, and this influx controls fundamental physiological processes such as cardiac contractility, insulin secretion, and neuronal plasticity. Dysfunction of these channels leads to severe human diseases, including Timothy syndrome, Brugada syndrome, and diabetes, making them prime therapeutic targets. Furthermore, the term provides a precise annotation for functional genomics studies, enabling researchers to distinguish high voltage-gated calcium channel activity from other calcium transport mechanisms.
• Essential for excitation-contraction coupling in cardiac and skeletal muscle.
• Mediates insulin secretion from pancreatic β-cells in response to glucose-induced depolarization.
• Controls activity-dependent gene expression and synaptic plasticity in neurons.
• Mutations in CACNA1C cause Timothy syndrome, a multisystem disorder with cardiac arrhythmias and autism.
• Altered expression of high voltage-gated calcium channels is observed in various cancers, including hepatocellular carcinoma.
• Targeted by clinically used drugs such as dihydropyridines, verapamil, and diltiazem for hypertension and angina.
• Provides a model system for studying voltage-dependent gating and ion selectivity.
• Involved in pain signaling and migraine pathophysiology.
• Regulated by pyridine nucleotides, linking cellular metabolism to calcium influx.
• Can be studied in heterologous expression systems and native tissues using electrophysiology and Ca2+ imaging.
What Happens During calcium ion transmembrane transport via high voltage-gated calcium channel?
Membrane Depolarization and Channel Activation
In simple terms: When a cell's electrical charge becomes more positive, the channel senses this change and opens.
High voltage-gated calcium channels are activated by strong membrane depolarization, typically beyond -40 mV. The voltage-sensing domains in the α1 subunit detect the change in membrane potential, leading to conformational changes that open the channel pore. This activation is distinct from low voltage-activated channels, which open at more negative potentials. The process is highly cooperative, and the channel's opening allows Ca2+ to flow down its electrochemical gradient into the cell.
Calcium Ion Permeation and Selectivity
In simple terms: Once open, the channel lets calcium ions pass through while largely excluding other ions.
The pore of high voltage-gated calcium channels is lined by four glutamate residues that form a high-affinity binding site for Ca2+. This selectivity filter allows Ca2+ to permeate while blocking Na+ and K+ under physiological conditions. The flux of Ca2+ through a single channel can be substantial, contributing to local and global calcium signals. The permeation process is driven by the electrochemical gradient and is modulated by the channel's gating properties.
Inactivation and Feedback Regulation
In simple terms: The channel closes after prolonged depolarization to prevent excessive calcium entry.
High voltage-gated calcium channels undergo both voltage-dependent and calcium-dependent inactivation. Calcium-dependent inactivation is mediated by calmodulin binding to the C-terminal tail of the α1 subunit, which accelerates channel closure in the presence of high intracellular Ca2+. This negative feedback prevents cytotoxic calcium overload. Additionally, phosphorylation by kinases such as PKA and PKC modulates inactivation kinetics.
Coupling to Downstream Signaling
In simple terms: The calcium that enters acts as a messenger to trigger various cellular responses.
Ca2+ entering through high voltage-gated calcium channels binds to effectors such as calmodulin, troponin C, and synaptotagmin, thereby initiating processes like muscle contraction, secretion, and gene transcription. In pancreatic β-cells, Ca2+ influx triggers insulin granule exocytosis. In neurons, it activates CaMKII and calcineurin, leading to changes in synaptic strength and gene expression. The spatial and temporal profile of Ca2+ signals is shaped by the channel's localization and auxiliary subunits.
Regulation by Auxiliary Subunits and Modifiers
In simple terms: Helper proteins and small molecules fine-tune how the channel works.
Auxiliary β subunits enhance trafficking and modulate gating, while α2δ subunits increase surface expression and alter inactivation. Pyridine nucleotides such as NAD+ and NADP+ can directly regulate ion channels, including high voltage-gated calcium channels, linking metabolic state to calcium influx. Additionally, G-protein βγ subunits can inhibit channel activity, providing a mechanism for neurotransmitter-mediated modulation.
Key Genes Involved in GO:0061577 calcium ion transmembrane transport via high voltage-gated calcium channel
The following genes encode subunits and regulators of high voltage-gated calcium channels that are directly involved in GO:0061577.
| Gene | Major Role | Research Relevance |
|---|---|---|
| CACNA1C | Pore-forming α1 subunit of Cav1.2 (L-type) | Central to cardiac and neuronal function; mutations cause Timothy syndrome. |
| CACNA1D | Pore-forming α1 subunit of Cav1.3 (L-type) | Involved in hearing, pacemaking, and aldosterone production. |
| CACNA1S | Pore-forming α1 subunit of Cav1.1 (skeletal muscle) | Essential for excitation-contraction coupling; mutations cause hypokalemic periodic paralysis. |
| CACNA1F | Pore-forming α1 subunit of Cav1.4 (retina) | Mutations lead to congenital stationary night blindness. |
| CACNB1 | Auxiliary β1 subunit | Modulates channel gating and trafficking in skeletal muscle. |
| CACNB2 | Auxiliary β2 subunit | Regulates cardiac and neuronal channels; linked to Brugada syndrome. |
| CACNB3 | Auxiliary β3 subunit | Modulates neuronal and endocrine channels. |
| CACNB4 | Auxiliary β4 subunit | Associated with epilepsy and ataxia. |
| CACNA2D1 | Auxiliary α2δ-1 subunit | Enhances surface expression; target of gabapentinoids. |
| CACNA2D2 | Auxiliary α2δ-2 subunit | Involved in cerebellar function and epilepsy. |
| CACNG1 | Auxiliary γ1 subunit | Modulates skeletal muscle calcium channels. |
| CACNG2 | Auxiliary γ2 subunit | Regulates AMPA receptor trafficking and neuronal channels. |
| CALM1 | Calmodulin | Mediates calcium-dependent inactivation of high voltage-gated calcium channels. |
| CAMK1 | Calcium/calmodulin-dependent protein kinase I | Phosphorylates and regulates channel trafficking and signaling. |
| TRPC4 | Transient receptor potential canonical 4 | Can interact with high voltage-gated calcium channels in some cells. |
| GNB1 | G-protein β1 subunit | Modulates channel activity via G-protein-coupled pathways. |
| PRKACA | Protein kinase A catalytic subunit | Phosphorylates channel subunits to enhance activity. |
| PRKCA | Protein kinase C alpha | Regulates channel phosphorylation and activity. |
How Is calcium ion transmembrane transport via high voltage-gated calcium channel Regulated?
The activity of high voltage-gated calcium channels is regulated at multiple levels. Phosphorylation by PKA and PKC modulates channel opening and inactivation. Calcium-bound calmodulin binds to the α1 subunit C-terminus to induce calcium-dependent inactivation, providing negative feedback. G-protein βγ subunits can inhibit channel activity, particularly in neurons. Pyridine nucleotides such as NAD+ and NADP+ have been shown to regulate ion channels, including high voltage-gated calcium channels, linking cellular redox state to calcium influx. Additionally, auxiliary subunits (β, α2δ, γ) regulate trafficking, gating, and drug sensitivity.
calcium ion transmembrane transport via high voltage-gated calcium channel and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| CACNA1C | Timothy syndrome, Brugada syndrome, psychiatric disorders | Knock-in mouse models with patient mutations; iPSC-derived cardiomyocytes. |
| CACNB2 | Brugada syndrome, hypertension | Knockout and point-mutation zebrafish or mouse models. |
| CACNA1D | Aldosterone-producing adenomas, autism | Adrenal cell lines with CRISPR knockout; transgenic mice. |
| CACNA1S | Hypokalemic periodic paralysis | Patient-derived myotubes; knock-in mouse models. |
| CAMK1 | Hepatocellular carcinoma progression | HCC cell lines with overexpression or knockout; xenograft models. |
Cardiac Arrhythmias and Timothy Syndrome
Mutations in CACNA1C, encoding the Cav1.2 α1 subunit, cause Timothy syndrome, a rare disorder characterized by long QT syndrome, syndactyly, and autism spectrum disorder. Gain-of-function mutations lead to prolonged cardiac action potentials and arrhythmias. Loss-of-function mutations in CACNB2 have been associated with Brugada syndrome. These findings highlight the critical role of GO:0061577 in cardiac electrophysiology.
Pancreatic β-Cell Dysfunction and Diabetes
High voltage-gated calcium channels, particularly Cav1.2 and Cav1.3, mediate glucose-stimulated insulin secretion in pancreatic β-cells. Dysregulation of these channels contributes to impaired insulin release in type 2 diabetes. Genetic variants in CACNA1C and CACNB2 have been linked to altered insulin secretion and diabetes risk.
Neurological and Psychiatric Disorders
In neurons, high voltage-gated calcium channels are essential for neurotransmitter release, synaptic plasticity, and gene expression. Mutations in CACNA1C are associated with bipolar disorder, schizophrenia, and autism. CACNB4 mutations have been linked to epilepsy and ataxia. These associations underscore the importance of precise calcium signaling through GO:0061577 in brain function.
Cancer
Altered expression of high voltage-gated calcium channels has been observed in various cancers, including hepatocellular carcinoma (HCC). CAMK1, a downstream effector of calcium signaling, is involved in phosphoinositide signal-mediated protein sorting and transport in HCC. Targeting calcium channels may offer therapeutic opportunities in cancer, though further research is needed.
From calcium ion transmembrane transport via high voltage-gated calcium channel-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does loss of CACNA1C abolish L-type calcium current? | CRISPR knockout in HEK293 or cardiomyocytes. |
| How does a Timothy syndrome mutation alter channel inactivation? | Point mutation knock-in in iPSC-derived cardiomyocytes. |
| Can a fluorescent tag track Cav1.2 trafficking? | Knock-in of GFP or HA tag at endogenous CACNA1C locus. |
| Does overexpression of CACNB2 enhance calcium influx? | Lentiviral overexpression in neuronal cell lines. |
| What is the role of CAMK1 in HCC calcium signaling? | CRISPR knockout or overexpression in HCC cell lines. |
| Can high voltage-gated calcium channels be studied in plant membranes? | Heterologous expression in wheat root plasma membrane vesicles. |
How to Study the calcium ion transmembrane transport via high voltage-gated calcium channel Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Patch-clamp electrophysiology | Ion currents through single channels or whole cells | Characterizing voltage dependence and kinetics of high voltage-gated calcium channels. |
| Calcium imaging | Intracellular Ca2+ concentration changes | Monitoring Ca2+ influx in response to depolarization. |
| CRISPR knockout | Loss of gene function | Determining necessity of a channel subunit for Ca2+ transport. |
| CRISPR knock-in | Introduction of specific mutations or tags | Modeling disease mutations or tracking channel localization. |
| RNA-seq | Transcriptional changes | Identifying genes regulated by calcium signaling. |
| Proteomics | Protein interactions and modifications | Mapping the channel interactome. |
| Fluorescence imaging of electrically stimulated cells | Real-time cellular responses | High-throughput screening of channel modulators. |
| Heterologous expression in plant membrane vesicles | Calcium channel activity in non-animal systems | Studying conserved properties of voltage-gated calcium channels. |
Electrophysiology
Patch-clamp recordings in whole-cell or single-channel configurations are the gold standard for measuring high voltage-gated calcium currents. These techniques allow precise characterization of activation, inactivation, and voltage dependence. They can be applied to native cells or heterologous expression systems.
Calcium Imaging
Fluorescent Ca2+ indicators such as Fura-2 or Fluo-4 enable real-time monitoring of intracellular Ca2+ changes in response to depolarization. This method is particularly useful for studying calcium influx through high voltage-gated calcium channels in intact cells. Genetically encoded indicators (e.g., GCaMP) allow cell-type-specific imaging.
CRISPR-Based Genetic Manipulation
CRISPR/Cas9 knockout, point mutation, and knock-in strategies allow precise editing of genes encoding channel subunits. These approaches can reveal causal roles of specific subunits in GO:0061577. For example, knockout of CACNA1C abolishes L-type current in cardiomyocytes.
Biochemical and Proteomic Approaches
Co-immunoprecipitation and mass spectrometry can identify channel-associated proteins and post-translational modifications. These methods help elucidate the regulatory network surrounding high voltage-gated calcium channels. Phosphoproteomics can reveal phosphorylation sites on channel subunits.
How CRISPR Can Be Used to Study GO:0061577 calcium ion transmembrane transport via high voltage-gated calcium channel
Knockout
CRISPR knockout of genes encoding high voltage-gated calcium channel subunits (e.g., CACNA1C, CACNB2) can abolish or reduce L-type calcium currents, providing definitive evidence for their role in GO:0061577. Knockout models are valuable for studying loss-of-function phenotypes in excitable cells.
Point Mutation
Introducing disease-associated point mutations (e.g., CACNA1C G406R in Timothy syndrome) via CRISPR allows precise modeling of channel dysfunction. These models help dissect how specific residues affect gating, permeation, and inactivation.
Knock-in
Knock-in of fluorescent tags (e.g., GFP) or epitope tags at endogenous loci enables real-time tracking of channel trafficking and localization. This approach preserves native regulatory elements and provides physiological expression levels.
Overexpression
CRISPR activation (CRISPRa) or lentiviral overexpression can increase channel subunit levels to study gain-of-function effects and downstream signaling. Overexpression of CACNB2, for example, can enhance calcium influx and modulate gene expression.
How EDITGENE Supports calcium ion transmembrane transport via high voltage-gated calcium channel Research
Researchers studying calcium ion transmembrane transport via high voltage-gated calcium channel-related genes often need to determine whether a candidate gene is causally involved in channel function, how specific mutations alter channel properties, or whether modulating gene expression affects downstream physiology. EDITGENE provides a comprehensive suite of CRISPR-based services to address these questions with precision and reproducibility.
Contact EDITGENE today to design your custom CRISPR model for calcium ion transmembrane transport via high voltage-gated calcium channel research.
Frequently Asked Questions About calcium ion transmembrane transport via high voltage-gated calcium channel
What is GO:0061577?
GO:0061577 is a Gene Ontology biological process term defined as the transport of calcium ions across a membrane specifically through high voltage-gated calcium channels, also known as L-type calcium channels.
What genes are involved in calcium ion transmembrane transport via high voltage-gated calcium channel?
Key genes include CACNA1C, CACNA1D, CACNA1S, CACNA1F (pore-forming α1 subunits), and auxiliary subunits such as CACNB1-4, CACNA2D1-2, and CACNG1-2.
What is the synonym for GO:0061577?
The synonym is 'generation of L-type calcium current'.
How is high voltage-gated calcium channel activity measured?
It is typically measured using patch-clamp electrophysiology to record calcium currents, or calcium imaging with fluorescent indicators to monitor intracellular Ca2+ changes.
What diseases are associated with high voltage-gated calcium channels?
Mutations in these channels are linked to Timothy syndrome, Brugada syndrome, hypokalemic periodic paralysis, congenital stationary night blindness, diabetes, and psychiatric disorders.
What is the difference between high voltage-gated and low voltage-gated calcium channels?
High voltage-gated calcium channels (L-type) activate at more positive potentials (above -40 mV) and have slower inactivation, while low voltage-gated (T-type) channels activate at more negative potentials and inactivate rapidly.
Can CRISPR be used to study GO:0061577?
Yes, CRISPR knockout, point mutation, and knock-in models are powerful tools to dissect the function of specific channel subunits and disease mutations.
What are auxiliary subunits of high voltage-gated calcium channels?
Auxiliary subunits include β, α2δ, and γ subunits, which modulate channel trafficking, gating, and drug sensitivity.
Is calcium ion transmembrane transport via high voltage-gated calcium channel involved in cancer?
Altered expression of these channels has been observed in cancers such as hepatocellular carcinoma, and downstream effectors like CAMK1 are implicated in tumor progression.
How does calmodulin regulate high voltage-gated calcium channels?
Calmodulin binds to the C-terminal tail of the α1 subunit and mediates calcium-dependent inactivation, providing negative feedback to prevent calcium overload.
Conclusion
GO:0061577 encapsulates a fundamental biological process: the influx of calcium ions through high voltage-gated calcium channels. This process is indispensable for excitation-contraction coupling, hormone secretion, and neuronal signaling, and its dysregulation underlies numerous human diseases. Understanding the molecular players and regulatory mechanisms of these channels is essential for developing targeted therapies. With advanced CRISPR tools and bioinformatics, researchers can now dissect the precise roles of channel subunits and their modifiers, paving the way for novel therapeutic interventions.
References
- 1. Freichel M et al.. 2014. TRPC4- and TRPC4-containing channels.. Handb Exp Pharmacol 222:85-128 PMID: 24756704
- 2. Tuluc P et al.. 2021. Role of High Voltage-Gated Ca(2+) Channel Subunits in Pancreatic β-Cell Insulin Release. From Structure to Function.. Cells 10(8) PMID: 34440773
- 3. Kilfoil PJ et al.. 2013. Regulation of ion channels by pyridine nucleotides.. Circ Res 112(4):721-41 PMID: 23410881
- 4. Burnett P et al.. 2003. Fluorescence imaging of electrically stimulated cells.. J Biomol Screen 8(6):660-7 PMID: 14711391
- 5. Wang L et al.. 2014. CAMK1 phosphoinositide signal-mediated protein sorting and transport network in human hepatocellular carcinoma (HCC) by biocomputation.. Cell Biochem Biophys 70(2):1011-6 PMID: 24825433
- 6. Huang JW et al.. 1994. Voltage-dependent Ca2+ influx into right-side-out plasma membrane vesicles isolated from wheat roots: characterization of a putative Ca2+ channel.. Proc Natl Acad Sci U S A 91(8):3473-7 PMID: 8159772
