12-2682039-G-T

Variant names:

• chr12-2682039-G-T
• rs10774054
• ENST00000682544.1:c.5768G>T

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The ENST00000682544.1(CACNA1C):​c.5768G>T​(p.Arg1923Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000691 in 1,446,910 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 6/7 in silico tools predict 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: 32)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: CACNA1C ENST00000682544.1 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.331
• Publications: 25 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: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.08665067).

Variant Effect in Transcripts

ACMG analysis was done for transcript: ENST00000682544.1. 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.5445-511G>T		intron	N/A	NP_000710.5
	CACNA1C	NM_001167623.2	MANE Plus Clinical	c.5445-511G>T		intron	N/A	NP_001161095.1
	CACNA1C	NM_199460.4		c.5678G>T	p.Arg1893Ile	missense	Exon 45 of 50	NP_955630.3

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CACNA1C	ENST00000682544.1		c.5768G>T	p.Arg1923Ile	missense	Exon 45 of 50	ENSP00000507184.1
	CACNA1C	ENST00000327702.12	TSL:1	c.5534G>T	p.Arg1845Ile	missense	Exon 43 of 48	ENSP00000329877.7
	CACNA1C	ENST00000399617.6	TSL:5	c.5534G>T	p.Arg1845Ile	missense	Exon 43 of 48	ENSP00000382526.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.91e-7 AC: 1 AN: 1446910 Hom.: 0 Cov.: 27 AF XY: 0.00000139 AC XY: 1 AN XY: 720776

African (AFR) AF: 0.00 AC: 0 AN: 33178

American (AMR) AF: 0.00 AC: 0 AN: 44692

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26016

East Asian (EAS) AF: 0.00 AC: 0 AN: 39648

South Asian (SAS) AF: 0.00 AC: 0 AN: 85874

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53320

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5688

European-Non Finnish (NFE) AF: 9.10e-7 AC: 1 AN: 1098634

Other (OTH) AF: 0.00 AC: 0 AN: 59860

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.18
BayesDel_noAF	Benign	-0.89
CADD	Benign	11
DEOGEN2	Benign	0.031	T
MetaRNN	Benign	0.087	T
PhyloP100		0.33
Sift4G	Benign	0.18	T
Vest4		0.28

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: rs10774054; hg19: chr12-2791205;