chr19-53993121-G-C

Position:

• chr19-53993121-G-C

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM2 PP3_Strong

The NM_145814.2(CACNG6):​c.244G>C​(p.Gly82Arg) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: CACNG6 NM_145814.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.40

Genes affected

CACNG6 (HGNC:13625): (calcium voltage-gated channel auxiliary subunit gamma 6) Voltage-dependent calcium channels are composed of five subunits. The protein encoded by this gene represents one of these subunits, gamma, and is one of two known gamma subunit proteins. This particular gamma subunit is an integral membrane protein that is thought to stabilize the calcium channel in an inactive (closed) state. This gene is part of a functionally diverse eight-member protein subfamily of the PMP-22/EMP/MP20 family and is located in a cluster with two family members that function as transmembrane AMPA receptor regulatory proteins (TARPs). Alternative splicing results in multiple transcript variants. Variants in this gene have been associated with aspirin-intolerant asthma. [provided by RefSeq, Dec 2010]

ACMG classification

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.97

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CACNG6	NM_145814.2	c.244G>C	p.Gly82Arg	missense_variant	1/4	ENST00000252729.7
CACNG6	NM_145815.2	c.244G>C	p.Gly82Arg	missense_variant	1/3
CACNG6	NM_031897.3	c.244G>C	p.Gly82Arg	missense_variant	1/2
CACNG6	NR_102308.2	n.49+1924G>C		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CACNG6	ENST00000252729.7	c.244G>C	p.Gly82Arg	missense_variant	1/4	1	NM_145814.2	P1
CACNG6	ENST00000346968.2	c.244G>C	p.Gly82Arg	missense_variant	1/3	5
CACNG6	ENST00000352529.1	c.244G>C	p.Gly82Arg	missense_variant	1/2	5

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jan 04, 2024

The c.244G>C (p.G82R) alteration is located in exon 1 (coding exon 1) of the CACNG6 gene. This alteration results from a G to C substitution at nucleotide position 244, causing the glycine (G) at amino acid position 82 to be replaced by an arginine (R). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.35	D
BayesDel_noAF	Pathogenic	0.27
CADD	Pathogenic	27
DANN	Uncertain	1.0
DEOGEN2	Benign	0.38	.;T;.
Eigen	Uncertain	0.57
Eigen_PC	Uncertain	0.52
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.95	D;D;D
M_CAP	Pathogenic	0.91	D
MetaRNN	Pathogenic	0.97	D;D;D
MetaSVM	Uncertain	0.36	D
MutationAssessor	Uncertain	2.6	.;M;.
MutationTaster	Benign	1.0	D;D;D
PrimateAI	Pathogenic	0.92	D
PROVEAN	Pathogenic	-7.4	D;D;D
REVEL	Pathogenic	0.87
Sift	Pathogenic	0.0	D;D;D
Sift4G	Pathogenic	0.0	D;D;D
Polyphen		1.0	D;P;P
Vest4		0.72
MutPred		0.83		Gain of MoRF binding (P = 0.0113);Gain of MoRF binding (P = 0.0113);Gain of MoRF binding (P = 0.0113);
MVP		0.93
MPC		1.4
ClinPred		1.0	D
GERP RS		3.7
Varity_R		0.89
gMVP		0.98

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

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr19-54496375;