Genetic Variant NM_024046.5:c.553G>A (chr3-49861189-C-T) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

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

The NM_024046.5(CAMKV):c.553G>A(p.Glu185Lys) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,460,974 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

CAMKV
NM_024046.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 7.82

Variant links:

Genes affected

CAMKV (HGNC:28788): (CaM kinase like vesicle associated) Predicted to enable calmodulin binding activity and calmodulin-dependent protein kinase activity. Predicted to be involved in peptidyl-serine phosphorylation. Predicted to be located in cytoplasmic vesicle membrane and plasma membrane. Predicted to be active in glutamatergic synapse and postsynapse. [provided by Alliance of Genome Resources, Apr 2022]

CAMKV links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CAMKV	NM_024046.5 link	c.553G>A	p.Glu185Lys	missense_variant	Exon 6 of 11	ENST00000477224.6	NP_076951.2	Q8NCB2-1A0A140VKD5
CAMKV	NM_001320147.2 link	c.553G>A	p.Glu185Lys	missense_variant	Exon 6 of 12		NP_001307076.1	Q8NCB2-3A0A024R331

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CAMKV	ENST00000477224.6 link	c.553G>A	p.Glu185Lys	missense_variant	Exon 6 of 11	1	NM_024046.5	ENSP00000419195.1		Q8NCB2-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1460974

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

726796

show subpopulations

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

African (AFR)

AF:

0.00

AC:

AN:

33468

American (AMR)

AF:

0.00

AC:

AN:

44684

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26130

East Asian (EAS)

AF:

0.00

AC:

AN:

39686

South Asian (SAS)

AF:

0.00

AC:

AN:

86216

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53022

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5758

European-Non Finnish (NFE)

AF:

9.00e-7

AC:

AN:

1111652

Other (OTH)

AF:

0.00

AC:

AN:

60358

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.000000), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.325

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Oct 19, 2024

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.553G>A (p.E185K) alteration is located in exon 6 (coding exon 5) of the CAMKV gene. This alteration results from a G to A substitution at nucleotide position 553, causing the glutamic acid (E) at amino acid position 185 to be replaced by a lysine (K). 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

1.0

BayesDel_addAF

Benign

-0.092

BayesDel_noAF

Pathogenic

0.21

CADD

Pathogenic

(source)

DANN

Pathogenic

1.0

DEOGEN2

Benign

0.0072

Eigen

Pathogenic

0.75

Eigen_PC

Pathogenic

0.76

FATHMM_MKL

Pathogenic

1.0

LIST_S2

Benign

0.25

M_CAP

Benign

0.082

MetaRNN

Benign

0.42

MetaSVM

Benign

-0.34

PhyloP100

7.8

PROVEAN

Benign

-0.65

REVEL

Benign

0.058

Sift

Benign

0.17

Sift4G

Uncertain

0.0050

MutPred

0.22

Loss of glycosylation at P97 (P = 0.0441);

MVP

0.76

ClinPred

0.90

GERP RS

5.4

Varity_R

0.20

Mutation Taster

=32/68

disease causing

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.23

Details are displayed if max score is > 0.2

DS_DG_spliceai

0.23

Position offset: -1

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

Publications

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NM_024046.5:c.553G>A

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over