17-39175296-C-G

Variant names:

• chr17-39175296-C-G
• rs779856110
• NM_000723.5:c.1694G>C

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2 BP4

The NM_000723.5(CACNB1):​c.1694G>C​(p.Arg565Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,878 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R565Q) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: CACNB1 NM_000723.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.58
• Publications: 4 publications found

Genes affected

CACNB1 (HGNC:1401): (calcium voltage-gated channel auxiliary subunit beta 1) The protein encoded by this gene belongs to the calcium channel beta subunit family. It plays an important role in the calcium channel by modulating G protein inhibition, increasing peak calcium current, controlling the alpha-1 subunit membrane targeting and shifting the voltage dependence of activation and inactivation. Alternative splicing occurs at this locus and three transcript variants encoding three distinct isoforms have been identified. [provided by RefSeq, Jul 2008]

ENSG00000266101 (HGNC:58562):

ACMG classification

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.3018226).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000723.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CACNB1	NM_000723.5	MANE Select	c.1694G>C	p.Arg565Pro	missense	Exon 14 of 14	NP_000714.3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CACNB1	ENST00000394303.8	TSL:1 MANE Select	c.1694G>C	p.Arg565Pro	missense	Exon 14 of 14	ENSP00000377840.3	Q02641-1
	CACNB1	ENST00000539338.6	TSL:1	n.3813G>C		non_coding_transcript_exon	Exon 12 of 12
	CACNB1	ENST00000910733.1		c.1829G>C	p.Arg610Pro	missense	Exon 14 of 14	ENSP00000580792.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.00000401 AC: 1 AN: 249482 AF XY: 0.00

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000290

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461878 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 727246

⚠️ 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: 33480

American (AMR) AF: 0.0000224 AC: 1 AN: 44718

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26134

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53416

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1112008

Other (OTH) AF: 0.00 AC: 0 AN: 60396

⚠️ 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.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.23
BayesDel_addAF	Uncertain	0.096	D
BayesDel_noAF	Uncertain	-0.020
CADD	Uncertain	24
DANN	Uncertain	1.0
DEOGEN2	Benign	0.21	T
Eigen	Uncertain	0.39
Eigen_PC	Uncertain	0.41
FATHMM_MKL	Benign	0.45	N
LIST_S2	Benign	0.85	D
M_CAP	Uncertain	0.17	D
MetaRNN	Benign	0.30	T
MetaSVM	Uncertain	-0.15	T
MutationAssessor	Benign	1.7	L
PhyloP100		1.6
PrimateAI	Uncertain	0.60	T
PROVEAN	Benign	-1.4	N
REVEL	Uncertain	0.52
Sift	Uncertain	0.0010	D
Sift4G	Benign	0.077	T
Polyphen		0.97	D
Vest4		0.14
MutPred		0.52		Loss of MoRF binding (P = 0.0093)
MVP		0.70
MPC		1.5
ClinPred		0.86	D
GERP RS		5.1
Varity_R		0.28
gMVP		0.54

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: rs779856110; hg19: chr17-37331549;