NM_000719.7:c.5360C>T

Variant names:

• chr12-2679712-C-T
• rs192749597
• NM_000719.7:c.5360C>T

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_Strong BP6_Very_Strong BS1 BS2

The NM_000719.7(CACNA1C):​c.5360C>T​(p.Thr1787Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000645 in 1,610,588 control chromosomes in the GnomAD database, including 3 homozygotes. In-silico tool predicts a benign outcome for this variant. 13/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Synonymous variant affecting the same amino acid position (i.e. T1787T) has been classified as Benign.

• Frequency:
  • Genomes: 𝑓 0.0033 (2 hom., cov: 33)
  • Exomes 𝑓: 0.00036 (1 hom.)
• Consequence: CACNA1C NM_000719.7 missense
• Clinical Significance: Benign/Likely benign criteria provided, multiple submitters, no conflicts B:7
• Conservation: PhyloP100: 2.83
• Publications: 8 publications found

Genes affected

CACNA1C (HGNC:1390): (calcium voltage-gated channel subunit alpha1 C) This gene encodes an alpha-1 subunit of a voltage-dependent calcium channel. Calcium channels mediate the influx of calcium ions into the cell upon membrane polarization. The alpha-1 subunit consists of 24 transmembrane segments and forms the pore through which ions pass into the cell. The calcium channel consists of a complex of alpha-1, alpha-2/delta, beta, and gamma subunits in a 1:1:1:1 ratio. There are multiple isoforms of each of these proteins, either encoded by different genes or the result of alternative splicing of transcripts. The protein encoded by this gene binds to and is inhibited by dihydropyridine. Alternative splicing results in many transcript variants encoding different proteins. Some of the predicted proteins may not produce functional ion channel subunits. [provided by RefSeq, Oct 2012]

ITFG2-AS1 (HGNC:53128): (ITFG2 antisense RNA 1)

CACNA1C-AS1 (HGNC:40119): (CACNA1C antisense RNA 1)

ACMG classification

Our verdict: Benign. The variant received -20 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.006759852).
• BP6: Variant 12-2679712-C-T is Benign according to our data. Variant chr12-2679712-C-T is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 136635.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BS1: Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00335 (510/152346) while in subpopulation AFR AF = 0.0116 (483/41588). AF 95% confidence interval is 0.0108. There are 2 homozygotes in GnomAd4. There are 245 alleles in the male GnomAd4 subpopulation. Median coverage is 33. This position passed quality control check.
• BS2: High AC in GnomAd4 at 510 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000719.7. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CACNA1C	NM_000719.7	MANE Select	c.5360C>T	p.Thr1787Met	missense	Exon 42 of 47	NP_000710.5
	CACNA1C	NM_001167623.2	MANE Plus Clinical	c.5360C>T	p.Thr1787Met	missense	Exon 42 of 47	NP_001161095.1
	CACNA1C	NM_199460.4		c.5504C>T	p.Thr1835Met	missense	Exon 44 of 50	NP_955630.3

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CACNA1C	ENST00000399603.6	TSL:5 MANE Plus Clinical	c.5360C>T	p.Thr1787Met	missense	Exon 42 of 47	ENSP00000382512.1
	CACNA1C	ENST00000399655.6	TSL:1 MANE Select	c.5360C>T	p.Thr1787Met	missense	Exon 42 of 47	ENSP00000382563.1
	CACNA1C	ENST00000682544.1		c.5594C>T	p.Thr1865Met	missense	Exon 44 of 50	ENSP00000507184.1

Frequencies

GnomAD3 genomes AF: 0.00334 AC: 508 AN: 152228 Hom.: 2 Cov.: 33

Gnomad AFR AF: 0.0116

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00111

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000207

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00316

Gnomad NFE AF: 0.0000882

Gnomad OTH AF: 0.00143

GnomAD2 exomes AF: 0.000916 AC: 219 AN: 239144 AF XY: 0.000707

Gnomad AFR exome AF: 0.0131

Gnomad AMR exome AF: 0.000828

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000561

Gnomad OTH exome AF: 0.000339

GnomAD4 exome AF: 0.000363 AC: 529 AN: 1458242 Hom.: 1 Cov.: 32 AF XY: 0.000316 AC XY: 229 AN XY: 725132

African (AFR) AF: 0.0109 AC: 362 AN: 33352

American (AMR) AF: 0.000882 AC: 39 AN: 44238

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25990

East Asian (EAS) AF: 0.00 AC: 0 AN: 39572

South Asian (SAS) AF: 0.0000584 AC: 5 AN: 85662

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53048

Middle Eastern (MID) AF: 0.00121 AC: 7 AN: 5764

European-Non Finnish (NFE) AF: 0.0000576 AC: 64 AN: 1110378

Other (OTH) AF: 0.000863 AC: 52 AN: 60238

GnomAD4 genome AF: 0.00335 AC: 510 AN: 152346 Hom.: 2 Cov.: 33 AF XY: 0.00329 AC XY: 245 AN XY: 74490

African (AFR) AF: 0.0116 AC: 483 AN: 41588

American (AMR) AF: 0.00105 AC: 16 AN: 15308

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5178

South Asian (SAS) AF: 0.000207 AC: 1 AN: 4824

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10630

Middle Eastern (MID) AF: 0.00340 AC: 1 AN: 294

European-Non Finnish (NFE) AF: 0.0000882 AC: 6 AN: 68026

Other (OTH) AF: 0.00142 AC: 3 AN: 2114

Alfa AF: 0.00172 Hom.: 2

Bravo AF: 0.00365

ESP6500AA AF: 0.0106 AC: 43

ESP6500EA AF: 0.000239 AC: 2

ExAC AF: 0.00116 AC: 140

Asia WGS AF: 0.00144 AC: 5 AN: 3478

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:7

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not specified Benign:2

Oct 07, 2013

GeneDx

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease.

Apr 09, 2025

Molecular Diagnostic Laboratory for Inherited Cardiovascular Disease, Montreal Heart Institute

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

not provided Benign:2

Sep 07, 2016

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant summary: The CACNA1C c.5360C>T (p.Thr1787Met) variant involves the alteration of a conserved nucleotide. 3/5 in silico tools predict a benign outcome for this variant. This variant was found in 126/107256 control chromosomes (one homozygote), predominantly observed in the African subpopulation at a frequency of 0.0161245 (115/7132). This frequency is about 1612 times the estimated maximal expected allele frequency of a pathogenic CACNA1C variant (0.00001), suggesting this is likely a benign polymorphism found primarily in the populations of African origin. This variant has been reported in three patients with arrhythmia in literature (Burashnikov_2010, Steffensen_2015, Wemhoner_2015), however without evidence for pathogenicity. One of the patients also carried a truncating variant in other gene, AKAP9 p.Thr3473AsnfsX3. Multiple clinical diagnostic laboratories have classified this variant as benign. Taken together, this variant is classified as Benign.

Breakthrough Genomics, Breakthrough Genomics

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: not provided

Brugada syndrome Benign:1

Dec 24, 2018

Center for Advanced Laboratory Medicine, UC San Diego Health, University of California San Diego

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Long QT syndrome Benign:1

Feb 03, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Cardiovascular phenotype Benign:1

Jul 11, 2016

Ambry Genetics

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This alteration is classified as benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity.

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.096
BayesDel_addAF	Benign	-0.27	T
BayesDel_noAF	Benign	-0.15
CADD	Benign	19
DANN	Uncertain	1.0
DEOGEN2	Benign	0.012	T
Eigen	Benign	-0.12
Eigen_PC	Benign	-0.23
FATHMM_MKL	Uncertain	0.94	D
MetaRNN	Benign	0.0068	T
MetaSVM	Uncertain	0.27	D
MutationAssessor	Benign	1.8	L
PhyloP100		2.8
PrimateAI	Benign	0.39	T
PROVEAN	Benign	-1.5	N
REVEL	Uncertain	0.34
Sift	Benign	0.050	D
Sift4G	Benign	0.10	T
Polyphen		0.97	D
Vest4		0.23
MVP		0.70
MPC		0.20
ClinPred		0.013	T
GERP RS		1.8
gMVP		0.39
Mutation Taster		=100/0	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs192749597; hg19: chr12-2788878;