GO:1904879 positive regulation of calcium ion transmembrane transport via high voltage-gated calcium channel: Mechanism, Genes and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:1904879 describes any process that increases the frequency, rate or extent of calcium ion transmembrane transport through high voltage-gated calcium channels.
• High voltage-gated calcium channels (HVGCCs), also called L-type calcium channels, open in response to strong membrane depolarization and are central to excitation-contraction coupling, secretion and gene expression.
• Positive regulation of these channels can occur through phosphorylation, protein-protein interactions, and signaling scaffolds that modify channel gating or surface expression.
• Dysregulation of HVGCC activity is linked to cardiovascular disease, neurological disorders and cancer, making this GO term clinically relevant.
• CRISPR knockout, point-mutation knock-in and overexpression models are powerful tools to dissect the causal roles of regulators of HVGCC-mediated calcium entry.
• Researchers can combine electrophysiology, calcium imaging, transcriptomics and proteomics to map the regulatory network of GO:1904879.
Description
GO:1904879, positive regulation of calcium ion transmembrane transport via high voltage-gated calcium channel, is a biological process term that captures any molecular event that enhances the movement of calcium ions across a membrane specifically through high voltage-gated calcium channels. These channels, often referred to as L-type calcium channels, are activated by strong depolarizations and are essential for converting electrical signals into intracellular calcium signals that drive contraction, secretion, and changes in gene expression. Understanding how this process is positively regulated is fundamental to physiology and disease, because even subtle shifts in calcium entry can alter cell fate and organ function. In biomedical research, GO:1904879 provides a standardized framework for annotating genes and pathways that modulate HVGCC activity. It helps researchers connect molecular mechanisms, such as phosphorylation or scaffolding protein interactions, to higher-order processes like cardiac rhythm, neuronal plasticity, and hormone release. As a result, this term is increasingly used in functional genomics, drug discovery, and systems biology studies that aim to manipulate calcium signaling for therapeutic benefit.
positive regulation of calcium ion transmembrane transport via high voltage-gated calcium channel At A Glance
| GO ID | GO:1904879 |
|---|---|
| GO term | positive regulation of calcium ion transmembrane transport via high voltage-gated calcium channel |
| Ontology | biological_process |
| Synonym | activation of generation of L-type calcium current; positive regulation of generation of L-type calcium current; up regulation of generation of L-type calcium current; up-regulation of generation of L-type calcium current; upregulation of generation of L-type calcium current |
| Major function | Enhances calcium ion transmembrane transport specifically through high voltage-gated calcium channels, often L-type channels, to increase intracellular calcium signals. |
| Related channels | High voltage-gated calcium channels include Cav1.1, Cav1.2, Cav1.3 and Cav1.4, which are activated by strong depolarizations. |
| Biological context | Excitation-contraction coupling in muscle, excitation-secretion coupling in endocrine cells, synaptic plasticity, and gene expression regulation. |
| Research relevance | Target for cardiovascular, neurological and oncological studies; used in CRISPR screens and electrophysiological assays. |
What Is GO:1904879?
In simple terms, GO:1904879 is about anything that boosts the flow of calcium ions through high voltage-gated calcium channels. The official definition states: Any process that activates or increases the frequency, rate or extent of calcium ion transmembrane transport via high voltage-gated calcium channel. This means the term covers positive regulators that act on these channels, including proteins that modify channel opening, increase channel availability at the cell surface, or enhance the driving force for calcium entry, but it excludes regulation of other calcium transport routes.
Why Is positive regulation of calcium ion transmembrane transport via high voltage-gated calcium channel Important in Cell Biology?
GO:1904879 is important because high voltage-gated calcium channels are pivotal hubs for calcium signal integration, and their positive regulation directly influences physiological outputs such as heart rate, vascular tone, neurotransmitter release, and hormone secretion. Dysregulation of these channels or their regulators can lead to hypertension, arrhythmias, epilepsy, chronic pain, and cancer progression, making this process a prime therapeutic target. Moreover, understanding positive regulation at the molecular level helps explain how cells fine-tune calcium entry in response to diverse stimuli, which is essential for developing selective modulators with fewer side effects.
• Controls excitation-contraction coupling in cardiac and smooth muscle, affecting heart function and blood pressure.
• Regulates excitation-secretion coupling in endocrine and neuroendocrine cells, influencing hormone release.
• Modulates synaptic plasticity and neuronal excitability, with implications for learning, memory and pain.
• Plays a role in gene expression by activating calcium-dependent transcription factors such as CREB and NFAT.
• Dysregulation is linked to cardiovascular diseases including arrhythmias and hypertension.
• Implicated in neurological disorders such as epilepsy, migraine and neurodegenerative diseases.
• Contributes to cancer hallmarks by promoting proliferation, survival and migration in some tumors.
• Serves as a target for clinically used drugs like dihydropyridines and phenylalkylamines.
• Provides a mechanistic entry point for CRISPR-based functional genomics of calcium signaling.
• Enables systems-level modeling of calcium dynamics in health and disease.
What Happens During positive regulation of calcium ion transmembrane transport via high voltage-gated calcium channel?
Channel activation and depolarization sensing
In simple terms: The channel senses a strong electrical change and opens its gate.
High voltage-gated calcium channels are activated by membrane depolarization beyond a threshold, typically around -40 mV to -20 mV. Positive regulation can lower this threshold or prolong the open state, allowing more calcium to enter. This step involves the voltage-sensing domains of the channel protein, which undergo conformational changes to open the pore.
Phosphorylation and post-translational modification
In simple terms: Adding phosphate groups to the channel can make it more active.
Protein kinases such as PKA, PKC, CaMKII and Src can phosphorylate high voltage-gated calcium channel subunits or their auxiliary proteins, enhancing channel activity. For example, PKA-mediated phosphorylation of Cav1.2 increases L-type calcium current, a classic example of positive regulation. These modifications can alter gating properties, increase channel surface expression, or modulate interactions with regulatory proteins.
Scaffolding and protein-protein interactions
In simple terms: Helper proteins hold the channel in place and boost its function.
Auxiliary subunits such as beta subunits and alpha2delta subunits, as well as scaffolding proteins like AKAPs and caveolin, can positively regulate HVGCCs by stabilizing the channel at the plasma membrane, facilitating phosphorylation, or coupling to downstream signaling. These interactions often occur in specialized membrane microdomains, ensuring efficient calcium signaling.
Calcium-dependent feedback and amplification
In simple terms: Calcium itself can trigger further calcium release or channel modulation.
Calcium entering through HVGCCs can activate calcium-induced calcium release from intracellular stores or stimulate calcium-dependent enzymes that further modulate channel activity. This positive feedback can amplify the initial calcium signal, although negative feedback via calmodulin also exists to prevent overload. The balance between positive and negative regulation determines the net calcium influx.
Integration with downstream signaling
In simple terms: The calcium signal is translated into cellular responses.
Increased calcium entry through HVGCCs activates calmodulin, calcineurin, CaMKII and other effectors, leading to changes in gene expression, contraction, secretion, or cell proliferation. Positive regulation of the channel thus directly shapes these downstream outcomes, making it a key control point in cellular physiology.
Key Genes Involved in GO:1904879 positive regulation of calcium ion transmembrane transport via high voltage-gated calcium channel
The following genes and proteins are central to the positive regulation of calcium ion transmembrane transport via high voltage-gated calcium channels, based on their established roles in channel function, modulation, and downstream signaling.
| Gene | Major Role | Research Relevance |
|---|---|---|
| CACNA1C | Pore-forming alpha-1 subunit of Cav1.2 L-type calcium channel | Mutations linked to Timothy syndrome, Brugada syndrome, and psychiatric disorders; target for CRISPR knock-in studies |
| CACNA1D | Pore-forming alpha-1 subunit of Cav1.3 channel | Implicated in aldosteronism, autism, and Parkinson's disease; used in electrophysiology |
| CACNA1S | Pore-forming alpha-1 subunit of Cav1.1 channel in skeletal muscle | Mutations cause hypokalemic periodic paralysis and malignant hyperthermia |
| CACNA1F | Pore-forming alpha-1 subunit of Cav1.4 channel in retina | Mutations lead to congenital stationary night blindness |
| CACNB1 | Beta auxiliary subunit that modulates channel gating and trafficking | Regulates current amplitude and inactivation; knockout models show cardiac phenotypes |
| CACNB2 | Beta auxiliary subunit predominantly in heart and brain | Associated with Brugada syndrome and hypertension; target for point mutations |
| CACNA2D1 | Alpha2delta auxiliary subunit that enhances surface expression | Target of gabapentinoids; involved in neuropathic pain |
| PRKACA | Catalytic subunit of PKA that phosphorylates Cav1.2 | Mediates beta-adrenergic stimulation of L-type current; knockout affects cardiac contractility |
| PRKCA | PKC alpha, phosphorylates channels and modulates activity | Involved in smooth muscle contraction and cancer; used in overexpression studies |
| CAMK2A | CaMKII alpha, calcium/calmodulin-dependent kinase | Phosphorylates Cav1.2 and regulates excitation-contraction coupling; key in cardiac hypertrophy |
| CALM1 | Calmodulin, calcium sensor that binds channels | Mediates calcium-dependent inactivation and facilitation; mutations cause arrhythmias |
| AKAP5 | A-kinase anchoring protein that scaffolds PKA near channels | Enhances phosphorylation efficiency; knockout alters L-type current |
| GNAS | G alpha s subunit that activates adenylyl cyclase | Mediates beta-adrenergic signaling to HVGCCs; mutations in McCune-Albright syndrome |
| ADRB1 | Beta-1 adrenergic receptor that triggers PKA pathway | Positive regulator of cardiac L-type calcium current; target for heart failure drugs |
| ADRB2 | Beta-2 adrenergic receptor | Modulates calcium current in smooth muscle and neurons |
| RYR2 | Ryanodine receptor 2, calcium release channel | Amplifies calcium signals downstream of HVGCCs; mutations cause CPVT |
| ATP2B1 | Plasma membrane calcium ATPase | Maintains calcium homeostasis and indirectly affects HVGCC driving force |
| SLC8A1 | Sodium-calcium exchanger | Regulates intracellular calcium and modulates HVGCC activity |
How Is positive regulation of calcium ion transmembrane transport via high voltage-gated calcium channel Regulated?
The positive regulation of high voltage-gated calcium channels is itself tightly controlled by multiple signaling pathways. Beta-adrenergic receptor activation via GNAS and ADRB1 leads to PKA activation, which phosphorylates Cav1.2 and enhances its activity. Calcium-calmodulin-dependent kinase II (CAMK2A) provides a calcium-dependent positive feedback that can further increase channel open probability. Protein kinase C (PRKCA) and Src family kinases also modulate channel function in a context-dependent manner. Conversely, phosphatases such as calcineurin can counteract phosphorylation, and calcium-dependent inactivation via calmodulin provides negative feedback. The integration of these opposing signals determines the net positive regulation of HVGCC-mediated calcium transport.
positive regulation of calcium ion transmembrane transport via high voltage-gated calcium channel and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| CACNA1C | Timothy syndrome, Brugada syndrome, schizophrenia | Knock-in mice with Timothy syndrome mutation; iPSC-derived cardiomyocytes |
| CACNA1D | Primary aldosteronism, autism, Parkinson's disease | Conditional knockout in adrenal gland; point-mutation knock-in |
| CACNB2 | Brugada syndrome, hypertension | Knockout and knock-in models in zebrafish and mice |
| PRKACA | Cushing's syndrome, cardiac arrhythmias | Liver-specific knockout; overexpression in cardiomyocytes |
| CAMK2A | Heart failure, epilepsy, learning deficits | Knockout and point-mutation knock-in mice |
Cardiovascular diseases
Dysregulation of positive regulation of HVGCCs is implicated in hypertension, arrhythmias, and heart failure. Gain-of-function mutations in CACNA1C cause Timothy syndrome, characterized by long QT and arrhythmias. Beta-adrenergic overstimulation increases L-type calcium current, contributing to cardiac hypertrophy and heart failure. Targeting these regulatory pathways is a mainstay of cardiovascular therapy.
Neurological and psychiatric disorders
In the brain, HVGCCs regulate neuronal excitability, synaptic plasticity, and gene expression. Mutations in CACNA1C and CACNA1D are associated with autism spectrum disorder, schizophrenia, and bipolar disorder. Enhanced Cav1.2 activity in the hippocampus can alter fear memory and anxiety-like behavior. Positive regulators such as CaMKII are linked to epilepsy and neuropathic pain.
Cancer
HVGCCs and their positive regulators contribute to cancer hallmarks by promoting proliferation, survival, and migration. In some cancers, increased L-type calcium current activates calcium-dependent transcription factors that drive oncogenic gene expression. Targeting these channels or their regulators is being explored as an anticancer strategy.
Endocrine and metabolic disorders
In pancreatic beta cells, HVGCCs mediate glucose-stimulated insulin secretion. Positive regulation of these channels enhances insulin release, and dysregulation contributes to type 2 diabetes. In adrenal glomerulosa cells, Cav1.3 channels regulate aldosterone production, with mutations causing primary aldosteronism.
From positive regulation of calcium ion transmembrane transport via high voltage-gated calcium channel-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does a candidate gene positively regulate HVGCC-mediated calcium entry? | CRISPR knockout in HEK293 or cardiomyocytes followed by calcium imaging |
| Does a specific phosphorylation site on Cav1.2 enhance channel activity? | Point-mutation knock-in of phospho-deficient or phospho-mimetic residues |
| What is the effect of a disease-associated mutation in CACNA1C? | Knock-in of the mutation in iPSCs or mice, then electrophysiology |
| Where and when is a regulator expressed relative to the channel? | Tagged knock-in with fluorescent protein for imaging |
| Can overexpression of a regulator increase calcium current? | Transient or stable overexpression in cell lines, patch-clamp recording |
| What genes are essential for HVGCC function in a genome-wide context? | CRISPR library screening with calcium-sensitive reporter |
How to Study the positive regulation of calcium ion transmembrane transport via high voltage-gated calcium channel Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Patch-clamp electrophysiology | Ion channel current amplitude, gating properties | Validation of HVGCC regulation by candidate genes |
| Calcium imaging (GCaMP, Fura-2) | Intracellular calcium concentration dynamics | High-throughput screening of regulators |
| RNA-seq | Transcriptome changes upon regulator manipulation | Identifying downstream signaling pathways |
| Proteomics (AP-MS, BioID) | Protein-protein interactions of channel subunits | Mapping the HVGCC interactome |
| CRISPR knockout screening | Gene essentiality for HVGCC function | Discovery of novel positive regulators |
| CRISPR activation (CRISPRa) | Gain-of-function of endogenous genes | Identifying sufficiency of regulators |
| FRET biosensors | Real-time kinase activity or calcium changes | Dynamic regulation studies |
| Immunofluorescence | Subcellular localization of channels and regulators | Validating trafficking and assembly |
Electrophysiology
Patch-clamp recording is the gold standard for measuring HVGCC currents directly. It can quantify changes in current amplitude, voltage dependence, and kinetics upon genetic manipulation of positive regulators. This method provides precise functional data to validate CRISPR models.
Calcium imaging
Fluorescent calcium indicators such as Fura-2 or GCaMP allow real-time monitoring of intracellular calcium changes in live cells. This technique can assess the impact of knockout or overexpression of candidate regulators on HVGCC-mediated calcium entry. It is amenable to high-throughput screening.
Transcriptomics and proteomics
RNA-seq and mass spectrometry can identify genes and proteins whose expression or interactions change when a regulator is manipulated. These approaches help build the regulatory network around HVGCCs and reveal compensatory mechanisms. They are often combined with CRISPR screens.
CRISPR screening and bioinformatics
Genome-wide CRISPR knockout or activation screens coupled with calcium reporters can uncover novel positive regulators of HVGCCs. Bioinformatics analysis of screen hits, such as pathway enrichment and network modeling, prioritizes candidates for follow-up. This systems-level approach accelerates discovery.
How CRISPR Can Be Used to Study GO:1904879 positive regulation of calcium ion transmembrane transport via high voltage-gated calcium channel
Knockout
CRISPR knockout of candidate positive regulators, such as PRKACA or CAMK2A, can abolish or reduce HVGCC-mediated calcium entry, demonstrating necessity. Knockout cell lines and animal models are used to study loss-of-function phenotypes in cardiovascular, neuronal, and endocrine contexts.
Point Mutation
Point mutations can be introduced into genes encoding channel subunits or regulators to mimic disease-associated variants or to test phosphorylation sites. For example, phospho-deficient or phospho-mimetic mutations in CACNA1C reveal the impact of specific residues on channel activity.
Knock-in
Knock-in of reporter tags (e.g., GFP) or disease mutations allows tracking of endogenous protein localization and function. Knock-in mice carrying human mutations in CACNA1C or CACNA1D model Timothy syndrome or aldosteronism, providing insights into positive regulation in vivo.
Overexpression
Overexpression of positive regulators, such as constitutively active CaMKII or PKA subunits, can enhance HVGCC currents and downstream calcium signaling. This approach tests sufficiency and can be combined with knockout for rescue experiments.
How EDITGENE Supports positive regulation of calcium ion transmembrane transport via high voltage-gated calcium channel Research
Researchers studying positive regulation of calcium ion transmembrane transport via high voltage-gated calcium channel-related genes often need to determine whether a candidate gene is causally involved in modulating channel activity, and to dissect the precise molecular mechanisms. EDITGENE provides comprehensive CRISPR-based services to accelerate this discovery process, from gene knockout to precise point mutations and library screening.
Contact EDITGENE today to design your custom CRISPR model for positive regulation of calcium ion transmembrane transport via high voltage-gated calcium channel research.
Frequently Asked Questions About positive regulation of calcium ion transmembrane transport via high voltage-gated calcium channel
What is GO:1904879?
GO:1904879 is a Gene Ontology biological process term defined as any process that activates or increases the frequency, rate or extent of calcium ion transmembrane transport via high voltage-gated calcium channel.
What are high voltage-gated calcium channels?
High voltage-gated calcium channels are a family of calcium channels, including L-type channels such as Cav1.2, that open in response to strong membrane depolarization and mediate calcium entry into cells.
What genes are involved in positive regulation of calcium ion transmembrane transport via high voltage-gated calcium channel?
Key genes include CACNA1C, CACNA1D, CACNB2, PRKACA, CAMK2A, and AKAP5, among others, which encode channel subunits or regulators that enhance channel activity.
How is high voltage-gated calcium channel activity positively regulated?
Positive regulation occurs through mechanisms such as phosphorylation by PKA or CaMKII, interaction with auxiliary subunits, scaffolding proteins, and calcium-dependent feedback, all of which increase calcium influx.
What diseases are associated with dysregulation of this process?
Dysregulation is linked to cardiovascular diseases (e.g., Timothy syndrome, arrhythmias), neurological disorders (e.g., autism, epilepsy), and some cancers.
What research methods are used to study GO:1904879?
Common methods include patch-clamp electrophysiology, calcium imaging, RNA-seq, proteomics, and CRISPR screens to identify and validate regulators.
How can CRISPR help study positive regulation of HVGCCs?
CRISPR knockout, point mutation, knock-in, and overexpression models allow researchers to test the necessity and sufficiency of candidate genes in modulating HVGCC activity.
What is the role of CACNA1C in this process?
CACNA1C encodes the pore-forming subunit of Cav1.2, a major high voltage-gated calcium channel; its activity is positively regulated by phosphorylation and auxiliary subunits.
Can overexpression of CaMKII increase calcium transport via HVGCCs?
Yes, overexpression of constitutively active CaMKII can enhance HVGCC currents by phosphorylating channel subunits, as shown in multiple studies.
Where can I find CRISPR models for studying this GO term?
EDITGENE provides custom CRISPR knockout, point mutation, knock-in, and overexpression services, as well as library screening and bioinformatics support for calcium signaling research.
Conclusion
GO:1904879 provides a precise ontological framework for studying how high voltage-gated calcium channels are positively regulated, a process fundamental to cardiovascular, neuronal, and endocrine physiology. Dysregulation of this process underlies numerous diseases, making it a rich area for therapeutic intervention. By leveraging CRISPR-based models and multi-omics approaches, researchers can dissect the molecular players and pathways that enhance HVGCC-mediated calcium transport, ultimately informing new treatments.
References
- 1. 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
