rs1544516

Variant names:

• chr12-2449134-T-A
• rs1544516
• NM_000719.7:c.617+19T>A

Your query was ambiguous. Multiple possible variants found:

• chr12-2449134-T-A
• chr12-2449134-T-C

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_000719.7(CACNA1C):​c.617+19T>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 7.4e-7 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: CACNA1C NM_000719.7 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.171
• Publications: 10 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]

CACNA1C Gene-Disease associations (from GenCC):

• Timothy syndrome

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Ambry Genetics, Orphanet, G2P, Labcorp Genetics (formerly Invitae)
• neurodevelopmental disorder with hypotonia, language delay, and skeletal defects with or without seizures

  Inheritance: AD Classification: STRONG Submitted by: Ambry Genetics
• long QT syndrome

  Inheritance: AD Classification: MODERATE Submitted by: ClinGen
• long QT syndrome 8

  Inheritance: AD Classification: MODERATE Submitted by: Ambry Genetics
• Brugada syndrome

  Inheritance: AD Classification: SUPPORTIVE, NO_KNOWN Submitted by: Orphanet, ClinGen
• Brugada syndrome 3

  Inheritance: AD Classification: LIMITED, NO_KNOWN Submitted by: Ambry Genetics, Genomics England PanelApp, Labcorp Genetics (formerly Invitae)
• intellectual disability

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics
• short QT syndrome

  Inheritance: AD Classification: LIMITED, NO_KNOWN Submitted by: Ambry Genetics, ClinGen

ENSG00000285734 (HGNC:):

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.84).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CACNA1C	NM_000719.7	c.617+19T>A		intron_variant	Intron 4 of 46	ENST00000399655.6	NP_000710.5
CACNA1C	NM_001167623.2	c.617+19T>A		intron_variant	Intron 4 of 46	ENST00000399603.6	NP_001161095.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CACNA1C	ENST00000399603.6	c.617+19T>A		intron_variant	Intron 4 of 46	5	NM_001167623.2	ENSP00000382512.1
CACNA1C	ENST00000399655.6	c.617+19T>A		intron_variant	Intron 4 of 46	1	NM_000719.7	ENSP00000382563.1
CACNA1C	ENST00000682544.1	c.707+19T>A		intron_variant	Intron 4 of 49			ENSP00000507184.1
CACNA1C	ENST00000406454.8	c.617+19T>A		intron_variant	Intron 4 of 47	5		ENSP00000385896.3
CACNA1C	ENST00000399634.6	c.617+19T>A		intron_variant	Intron 4 of 46	5		ENSP00000382542.2
CACNA1C	ENST00000683824.1	c.707+19T>A		intron_variant	Intron 4 of 47			ENSP00000507867.1
CACNA1C	ENST00000347598.9	c.617+19T>A		intron_variant	Intron 4 of 48	1		ENSP00000266376.6
CACNA1C	ENST00000344100.7	c.617+19T>A		intron_variant	Intron 4 of 46	1		ENSP00000341092.3
CACNA1C	ENST00000327702.12	c.617+19T>A		intron_variant	Intron 4 of 47	1		ENSP00000329877.7
CACNA1C	ENST00000399617.6	c.617+19T>A		intron_variant	Intron 4 of 47	5		ENSP00000382526.1
CACNA1C	ENST00000682462.1	c.707+19T>A		intron_variant	Intron 4 of 46			ENSP00000507105.1
CACNA1C	ENST00000683781.1	c.707+19T>A		intron_variant	Intron 4 of 46			ENSP00000507434.1
CACNA1C	ENST00000683840.1	c.707+19T>A		intron_variant	Intron 4 of 46			ENSP00000507612.1
CACNA1C	ENST00000683956.1	c.707+19T>A		intron_variant	Intron 4 of 46			ENSP00000506882.1
CACNA1C	ENST00000399638.5	c.617+19T>A		intron_variant	Intron 4 of 47	1		ENSP00000382547.1
CACNA1C	ENST00000335762.10	c.617+19T>A		intron_variant	Intron 4 of 47	5		ENSP00000336982.5
CACNA1C	ENST00000399606.5	c.617+19T>A		intron_variant	Intron 4 of 47	1		ENSP00000382515.1
CACNA1C	ENST00000399621.5	c.617+19T>A		intron_variant	Intron 4 of 46	1		ENSP00000382530.1
CACNA1C	ENST00000399637.5	c.617+19T>A		intron_variant	Intron 4 of 46	1		ENSP00000382546.1
CACNA1C	ENST00000402845.7	c.617+19T>A		intron_variant	Intron 4 of 46	1		ENSP00000385724.3
CACNA1C	ENST00000399629.5	c.617+19T>A		intron_variant	Intron 4 of 46	1		ENSP00000382537.1
CACNA1C	ENST00000682336.1	c.617+19T>A		intron_variant	Intron 4 of 46			ENSP00000507898.1
CACNA1C	ENST00000399591.5	c.617+19T>A		intron_variant	Intron 4 of 45	1		ENSP00000382500.1
CACNA1C	ENST00000399595.5	c.617+19T>A		intron_variant	Intron 4 of 45	1		ENSP00000382504.1
CACNA1C	ENST00000399649.5	c.617+19T>A		intron_variant	Intron 4 of 45	1		ENSP00000382557.1
CACNA1C	ENST00000399597.5	c.617+19T>A		intron_variant	Intron 4 of 46	1		ENSP00000382506.1
CACNA1C	ENST00000399601.5	c.617+19T>A		intron_variant	Intron 4 of 46	1		ENSP00000382510.1
CACNA1C	ENST00000399641.6	c.617+19T>A		intron_variant	Intron 4 of 46	1		ENSP00000382549.1
CACNA1C	ENST00000399644.5	c.617+19T>A		intron_variant	Intron 4 of 46	1		ENSP00000382552.1
CACNA1C	ENST00000682835.1	c.617+19T>A		intron_variant	Intron 4 of 46			ENSP00000507282.1
CACNA1C	ENST00000683482.1	c.617+19T>A		intron_variant	Intron 4 of 46			ENSP00000507169.1
CACNA1C	ENST00000682686.1	c.617+19T>A		intron_variant	Intron 4 of 45			ENSP00000507309.1
CACNA1C	ENST00000682152.1	c.566+19T>A		intron_variant	Intron 3 of 5			ENSP00000506759.1
CACNA1C	ENST00000480911.6	n.617+19T>A		intron_variant	Intron 4 of 26	5		ENSP00000437936.2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Data not reliable, filtered out with message: AS_VQSR AF: 7.37e-7 AC: 1 AN: 1356394 Hom.: 0 Cov.: 27 AF XY: 0.00000150 AC XY: 1 AN XY: 665792

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 29812

American (AMR) AF: 0.00 AC: 0 AN: 29114

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 23802

East Asian (EAS) AF: 0.00 AC: 0 AN: 35226

South Asian (SAS) AF: 0.00 AC: 0 AN: 71266

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 48868

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5502

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1056462

Other (OTH) AF: 0.0000177 AC: 1 AN: 56342

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.84
CADD	Benign	6.9
DANN	Benign	0.40
PhyloP100		0.17

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: rs1544516; hg19: chr12-2558300; COSMIC: COSV100219394;