| 2001 |
Human CaV1.3 (α1D) splice variant containing exon 8A forms L-type Ca²⁺ channels that activate at more negative voltages (threshold ~−45.7 mV) and inactivate more slowly than CaV1.2; reduced dihydropyridine sensitivity results from voltage-dependence of DHP block rather than lower binding affinity, as shown by radioligand binding and patch-clamp in tsA-201 cells. |
Whole-cell patch-clamp electrophysiology, radioligand binding, heterologous expression in tsA-201 cells |
The Journal of biological chemistry |
High |
11285265
|
| 2001 |
CaV1.3 channels from neuroendocrine cells are stimulated (rather than inhibited) by ligand-bound Gi/Go-coupled GPCRs, an effect mimicked by phorbol ester and blocked by serine/threonine kinase inhibitors but not PI3K inhibitor wortmannin, indicating PKC-dependent regulation distinct from CaV2.2. |
Xenopus oocyte expression, whole-cell patch-clamp, pharmacological dissection |
Molecular endocrinology |
Medium |
11435619
|
| 2003 |
Genetic knockout of Cav1.3 in mice abolishes the L-type Ca²⁺ current component activating at diastolic depolarization voltages in sinoatrial node cells, demonstrating that Cav1.3 channels are essential for cardiac pacemaker diastolic depolarization and that their absence causes bradycardia and spontaneous arrhythmia. |
Gene-targeted knockout mice, patch-clamp recording of sinoatrial node cells, pharmacological L-type current analysis |
Proceedings of the National Academy of Sciences of the United States of America |
High |
12700358
|
| 2003 |
CaV1.3 channels are the dominant voltage-gated Ca²⁺ channels in cochlear inner hair cells (IHCs); their absence in CaV1.3-/- mice nearly eliminates evoked exocytosis, prevents normal IHC maturation (loss of Ca²⁺ action potentials, failure to acquire BK channels, persistence of efferent cholinergic input), and leaves exocytosis triggered by flash photolysis of caged Ca²⁺ intact, indicating tight coupling of CaV1.3 to exocytosis. |
Patch-clamp, membrane capacitance measurements, photolysis of caged Ca²⁺, pharmacological channel subtype identification in CaV1.3-/- mice |
The Journal of neuroscience |
High |
14645476
|
| 2005 |
CaV1.3 channels cluster preferentially at ribbon-type active zones of IHCs (~80 channels/active zone); nonstationary fluctuation analysis estimates ~1700 total channels. Manipulation of single-channel current vs. open-channel number reveals nanodomain Ca²⁺ coupling: RRP exocytosis has high intrinsic Ca²⁺ cooperativity with single-channel current but near-unity apparent cooperativity with channel number, indicating few nearby CaV1.3 channels impose nanodomain [Ca²⁺] on release sites. |
Nonstationary fluctuation analysis, immunohistochemistry, membrane capacitance recordings, pharmacological manipulation of single-channel current |
The Journal of neuroscience |
High |
16354915
|
| 2005 |
The long C-terminal splice variant of CaV1.3 (CaV1.3a) contains SH3- and PDZ-binding motifs that directly and specifically associate with the scaffolding protein Shank (yeast two-hybrid, in vitro pull-down); Shank-binding is necessary and sufficient for synaptic clustering of CaV1.3 in hippocampal neurons and is required for CaV1.3-mediated pCREB signaling. |
Yeast two-hybrid, in vitro binding assay, immunocytochemistry in hippocampal neurons, dominant-negative peptide experiments, dihydropyridine-resistant mutant channels |
The Journal of neuroscience |
High |
15689539
|
| 2005 |
D2 dopaminergic and M1 muscarinic receptors selectively modulate CaV1.3 (not other L-type channels) in striatal medium spiny neurons; this modulation requires the CaV1.3 PDZ-binding domain and its interaction with Shank, and Shank–Homer interaction, establishing a signaling complex at corticostriatal synapses that enables GPCR regulation of CaV1.3 and glutamatergic integration. |
Electrophysiology in striatal neurons, intracellular dialysis of competing peptides, CaV1.3 knockout mice, immunocytochemistry |
The Journal of neuroscience |
High |
15689540
|
| 2006 |
IGF-1/RTK modulates CaV1.3 channels via a PLC→IP3-store Ca²⁺ release→CaMKII cascade; CaMKII phosphorylation of serine S1486 in the EF-hand motif of the CaV1.3 α1 subunit is required, causing a hyperpolarizing shift in current-voltage relationship and potentiation of peak currents, and contributing to pCREB activation. |
Site-directed mutagenesis (S1486A), pharmacological inhibitors, patch-clamp, pCREB immunostaining in cortical/hippocampal neurons |
The Journal of neuroscience |
High |
16763033
|
| 2006 |
PKA (via membrane-permeable 8-bromo-cAMP) phosphorylates the CaV1.3 α1 subunit and significantly increases α1D Ca²⁺ channel current density in tsA201 cells; this increase is blocked by the PKA inhibitor PKI, demonstrating PKA-dependent positive modulation of CaV1.3. |
Heterologous expression in tsA201 cells, whole-cell patch-clamp, pharmacology, Western blot phosphorylation assay |
American journal of physiology. Heart and circulatory physiology |
Medium |
15615842
|
| 2006 |
PKC inhibits CaV1.3 Ca²⁺ channels through phosphorylation of serine 81 at the N-terminal region; introduction of a phosphomimetic S81D recapitulates inhibition, and dialysis of a competing 35-aa peptide containing S81 prevents PKC modulation; βII- and εPKC isoforms are specifically responsible. |
Site-directed mutagenesis (S81D), competing peptide dialysis, isoform-specific PKC pharmacology, whole-cell patch-clamp in tsA201 cells |
American journal of physiology. Heart and circulatory physiology |
High |
16973824
|
| 2007 |
CaBP1, a calmodulin-like Ca²⁺-binding protein, blunts Ca²⁺-dependent inactivation (CDI) of CaV1.3 by interacting with calmodulin-binding sequences in the CaV1.3 α1 subunit; CaBP1 is strongly localized at presynaptic ribbon synapses of adult IHCs and is implicated in conferring anomalously slow CDI required for auditory transmission. CaBP4 interacts with the same sequences but suppresses CDI less efficiently. |
Co-immunoprecipitation, heterologous expression with patch-clamp, immunolocalization in IHCs, CaBP4-/- mice |
The Journal of physiology |
High |
17947313
|
| 2007 |
CaV1.3 and RyR2 physically interact via the CaV1.3 N-terminus (identified by yeast two-hybrid and confirmed by co-immunoprecipitation) in rat hippocampus; depolarization activating L-type Ca²⁺ channels triggers RyR2-dependent Ca²⁺ release even without extracellular Ca²⁺, and this effect is blocked by siRNA silencing of CaV1.3. |
Yeast two-hybrid, co-immunoprecipitation, immunocytochemistry, siRNA knockdown, Ca²⁺ imaging in hippocampal neurons |
The Journal of biological chemistry |
High |
17823125
|
| 2008 |
Alternative splicing in the CaV1.3 C-terminus generates long (CaV1.3₄₂) and short (CaV1.3₄₂A) forms; the long form contains a C-terminal modulatory domain (CTM) whose removal (short form or CaV1.3ΔC116 truncation) shifts activation to more negative voltages and enhances Ca²⁺-dependent inactivation. FRET experiments confirm intramolecular C-terminal protein interaction that modulates calmodulin binding to the IQ domain. |
Heterologous expression in HEK-293 cells, whole-cell patch-clamp, FRET, truncation/deletion constructs, co-expression of C-terminal peptide |
The Journal of biological chemistry |
High |
18482979
|
| 2008 |
The otoferlin C2D domain directly binds the CaV1.3 II-III loop in a Ca²⁺-dependent manner; the deafness-causing mutation L1011P in C2D renders this interaction Ca²⁺-insensitive and greatly reduced, while the C2F domain binds syntaxin 1A and SNAP-25, defining otoferlin as a molecular link between the Ca²⁺ channel and the SNARE complex at IHC synapses. |
Fusion protein pull-down with disease-associated mutants, Ca²⁺-dependent binding assays, Kd measurements |
The Journal of biological chemistry |
High |
19004828
|
| 2009 |
Whirlin (USH2D protein) specifically interacts with CaV1.3 via PDZ domain binding (confirmed by yeast two-hybrid, GST pull-down, co-immunoprecipitation); CaV1.3 and whirlin co-localize at the connecting cilium and photoreceptor synapse in adult retina, integrating CaV1.3 into the Usher protein network. |
Yeast two-hybrid, GST pull-down, co-immunoprecipitation, immunofluorescence and immunoelectron microscopy in retina |
Investigative ophthalmology & visual science |
High |
19959638
|
| 2010 |
CaV1.3 undergoes Ca²⁺-dependent facilitation (CDF) only when densin and CaMKII are co-expressed together; facilitation requires Ca²⁺, CaMKII activation, CaMKII–densin association, and densin binding to the CaV1.3 α1 C-terminal domain. CaV1.3, densin, and CaMKII form a complex in brain and co-localize at dendritic spines. |
Heterologous expression in HEK293T cells, co-immunoprecipitation from brain, patch-clamp, dominant-negative CaMKII |
The Journal of neuroscience |
High |
20392935
|
| 2010 |
CaV1.3 directly associates with GABABR2 via yeast two-hybrid, GST pull-down, and co-immunoprecipitation; GABAB receptor activation increases CaV1.3 (but not CaV1.2) currents and intracellular Ca²⁺, demonstrating subtype-specific functional coupling between GABABR and CaV1.3. |
Yeast two-hybrid, GST pull-down, co-immunoprecipitation, patch-clamp, Ca²⁺ imaging in HEK293 and hippocampal neurons |
FEBS letters |
Medium |
20627102
|
| 2010 |
RIM2α binds to the β-subunit of the CaV1.3 channel complex, co-localizes with CaV1.3 at IHC presynaptic active zones, and slows both Ca²⁺-dependent and voltage-dependent inactivation of CaV1.3 channels, generating a non-inactivating current component characteristic of IHC CaV1.3 currents. |
Co-localization in IHCs, heterologous expression in tsA-201 cells, patch-clamp |
Molecular and cellular neurosciences |
Medium |
20363327
|
| 2010 |
Loss of function of CACNA1D in humans (insertion of glycine causing non-conducting channels with abnormal voltage-dependent gating) causes SANDD syndrome (sinoatrial node dysfunction and deafness), establishing that CaV1.3 is required for human SAN pacemaking and auditory hair cell function. |
Positional cloning, Sanger sequencing, heterologous expression with patch-clamp of mutant channels |
Nature neuroscience |
High |
21131953
|
| 2011 |
Harmonin, a PDZ-domain scaffolding protein required for mechanosensory function, associates with CaV1.3 at IHC presynapses and limits CaV1.3 channel surface availability through a ubiquitin-dependent degradation pathway. |
Co-immunoprecipitation at IHC synapse, ubiquitin pathway assay, immunofluorescence |
Nature neuroscience |
High |
21822269
|
| 2011 |
The C-terminus of CaV1.3 translocates to the nucleus in atrial myocytes in a Ca²⁺-dependent manner, where it functions as a transcriptional regulator to modulate SK2 channel expression; CaV1.3 null mice show decreased myosin light chain 2 protein, which interacts with SK2 to regulate its membrane localization. |
Nuclear fractionation, CaV1.3-/- mouse model, Western blot, co-immunoprecipitation |
The Journal of biological chemistry |
Medium |
25538241
|
| 2012 |
Zebrafish CaV1.3a channels regulate synaptic ribbon size in hair cells: genetic disruption or acute pharmacological block enlarges ribbons, while channel activation reduces ribbon size and intact synapses. Ca²⁺ influx through CaV1.3a is required for synaptic maintenance; effects are not due to loss of neurotransmission. |
In vivo Ca²⁺ imaging, confocal and super-resolution microscopy, genetic mutants, pharmacological manipulation, vglut3 mutant controls in zebrafish |
The Journal of neuroscience |
High |
23197719
|
| 2012 |
CaV1.3 channels in the sinoatrial node co-localize with ryanodine receptors in sarcomeric structures (while CaV1.2 is restricted to delimiting membrane); CaV1.3 undergoes stronger voltage-dependent facilitation (VDF) than CaV1.2 during recovery from inactivation, which enhances pacemaker recovery after pauses via preferential coupling to RyR-mediated Ca²⁺ release. |
Patch-clamp with DHP-insensitive CaV1.2 knock-in mice to isolate channel-specific currents, immunofluorescence co-localization, computational modeling |
The Journal of physiology |
High |
23045342
|
| 2013 |
Somatic mutations altering Gly403 or Ile770 in the S6 pore-lining segments of CACNA1D cause gain-of-function in aldosterone-producing adenomas: Gly403 mutations shift activation to less depolarized potentials and impair inactivation; both lead to increased Ca²⁺ influx driving aldosterone production. Identical positions mutated as germline de novo cause primary aldosteronism with neuromuscular abnormalities. |
Whole-exome sequencing, heterologous expression of mutant channels, whole-cell patch-clamp in tsA-201 cells |
Nature genetics |
High |
23913001
|
| 2013 |
RNA editing by ADAR2 at the IQ domain of CaV1.3 (within exon 41) reduces Ca²⁺-dependent inactivation (CDI) by weakening prebinding of Ca²⁺-free calmodulin (apoCaM) to the channel rather than attenuating Ca²⁺/CaM binding; this makes CDI continuously tunable by fluctuations in ambient calmodulin levels, an effect confirmed in substantia nigral neurons. |
Heterologous expression with RNA-edited channels, patch-clamp, calmodulin titration, recordings from substantia nigra neurons |
Cell reports |
High |
24120865
|
| 2013 |
Harmonin binding to the CaV1.3 α1 distal C-terminus (dCT) enhances voltage-dependent facilitation (VDF) of CaV1.3 currents in HEK293T cells and in mouse IHCs; dfcr harmonin mutant that cannot bind α1 dCT fails to promote VDF and reduces synchronous exocytosis in mature IHCs, demonstrating a multifaceted presynaptic role of harmonin in regulating CaV1.3 and exocytosis. |
Heterologous expression with mutant harmonin variants, patch-clamp, membrane capacitance recordings in IHCs from dfcr mice |
The Journal of physiology |
High |
23613530
|
| 2014 |
De novo CACNA1D mutations p.A749G and p.G407R in autism spectrum disorder patients cause gain-of-function: p.A749G shifts voltage-dependence of activation and inactivation ~15 mV negative; p.G407R markedly slows current inactivation; both increase Ca²⁺ influx through CaV1.3. |
Whole-cell patch-clamp of mutant channels expressed in tsA-201 cells |
Biological psychiatry |
High |
25620733
|
| 2014 |
The C-terminal modulatory domain (CTM) controls coupling of voltage-sensor movement to pore opening in CaV1.3: the CTM weakens this coupling so that a greater fraction of charge must move before channel opening; removal of CTM (short splice variant CaV1.3₄₂A) enhances coupling efficiency, shifting activation ~7.2 mV negative without affecting voltage-sensor charge movement. |
Gating current measurement (QON-V) and ionic current recording in tsA-201 cells expressing long and short CaV1.3 splice variants |
Biophysical journal |
High |
24703308
|
| 2015 |
RIM2α and RIM2β are expressed at IHC active zones and promote clustering of CaV1.3 channels; RIM2α-deficient IHCs have fewer synaptic CaV1.3 channels (confirmed by superresolution microscopy), reduced Ca²⁺ influx, and proportionally reduced exocytosis; RIM2 binds the channel β-subunit. |
Immunofluorescence, superresolution microscopy, patch-clamp fluctuation analysis, Ca²⁺ imaging, electron tomography, hair cell-specific conditional KO |
Proceedings of the National Academy of Sciences of the United States of America |
High |
26034270
|
| 2015 |
In substantia nigra dopamine neurons, Cav1.3 L-type Ca²⁺ channel activity, together with internal Ca²⁺ and the neuronal calcium sensor NCS-1, is required for sensitization of D2-autoreceptor responses; Cav1.3 activity promotes NCS-1 interaction with D2 receptors, modulating inhibitory GIRK2-mediated feedback. This pathway is also active in human SN DA neurons and is altered in Parkinson's disease. |
Electrophysiology in brain slices from Cav1.3 KO and WT mice, pharmacological tools, in vivo manipulation with l-DOPA/cocaine, mRNA analysis of human SN neurons |
Brain : a journal of neurology |
High |
24934288
|
| 2015 |
The cell-type-specific function of the CaV1.3 C-terminal modulatory domain (CTM) differs between IHCs and chromaffin cells: CTM disruption impairs Ca²⁺-dependent inactivation in IHCs but increases it in chromaffin cells, causing hyperpolarized resting potential and reduced pacemaking in chromaffin cells. |
Knock-in mice with HA tag disrupting CTM, patch-clamp in IHCs and chromaffin cells, hearing threshold measurement |
Frontiers in cellular neuroscience |
High |
26379493
|
| 2016 |
Cav1.3 channels provide Ca²⁺ influx during diastolic depolarization in SAN cells that triggers local RyR-dependent Ca²⁺ release events; Cav1.3-/- SAN cells show reduced frequency and impaired synchronization of local Ca²⁺ release, preventing Ca²⁺ transient generation and spontaneous activity. Caffeine-stimulated Ca²⁺-induced Ca²⁺ release rescues pacemaking in Cav1.3-/- cells. |
Ca²⁺ imaging in isolated SAN cells and ex vivo preparations from Cav1.3-/- and WT mice, action potential voltage-clamp commands, caffeine rescue experiments |
Cardiovascular research |
High |
26786159
|
| 2016 |
The α2δ2 auxiliary subunit co-assembles with CaV1.3 at IHC presynapses; ducky (α2δ2-null) mice show 30-40% reduction of CaV1.3 Ca²⁺ and Ba²⁺ currents with altered gating, reduced exocytosis proportional to reduced Ca²⁺ influx, and impaired trans-synaptic alignment between presynaptic CaV1.3 clusters and postsynaptic AMPA receptor/PSD-95 clusters. |
Patch-clamp, immunofluorescence, Ca²⁺ imaging in ducky null mouse IHCs |
The Journal of neuroscience |
High |
27798183
|
| 2017 |
De novo CACNA1D mutation V401L (in the activation gate) causes gain-of-function in a patient with ASD and epilepsy: significantly increases current density, shifts activation and inactivation to more negative voltages, and reduces inactivation in both long and short CaV1.3 splice variants; mutant channels retain full sensitivity to isradipine. |
Whole-cell patch-clamp of V401L mutant channels expressed in tsA-201 cells, both splice variants tested |
Human molecular genetics |
High |
28472301
|
| 2018 |
Brain-selective RNA editing of CaV1.3 transcripts is restricted to neurons by splicing factor SRSF9, which inhibits ADAR2-mediated editing. Mechanistically, SRSF9 directly binds the RNA duplex required for editing (formed between exon 41 and an intronic editing-site complementary sequence), and selective down-regulation of SRSF9 in neurons enables neuron-specific CaV1.3 editing. |
Minigene editing assay with ADAR2 and SRSF9, CLIP/RIP to demonstrate direct RNA binding, SRSF9 knockdown/overexpression |
Nucleic acids research |
High |
29733375
|
| 2016 |
An autism-associated de novo mutation A760G (equivalent to A749G in another numbering) severely diminishes Ca²⁺-dependent inactivation (CDI) of CaV1.3 by enhancing channel opening within the Ca²⁺-inactivated mode; simultaneously, A760G increases voltage-dependent inactivation (VDI), creating opposing regulatory effects that together increase intracellular Ca²⁺. |
Whole-cell patch-clamp of mutant channels, allosteric gating model analysis |
Scientific reports |
High |
27255217
|
| 2020 |
CACNA1D gain-of-function mutation S652L shifts voltage-dependence of activation and steady-state inactivation ~13-17 mV negative, increases window currents at subthreshold voltages, slows tail currents, and increases Ca²⁺ during AP-like stimuli; it also increases sensitivity to isradipine 3-4-fold. The contrasting loss-of-function S652W mutation shifts gating positive, confirming that only gain-of-function variants confer high disease risk. |
Whole-cell patch-clamp of mutant and wild-type CaV1.3 in tsA-201 cells, isradipine dose-response |
Molecular autism |
High |
31921405
|