dbSNP rs878854753: ACTC1:p.Gln43His (chr15-34794680-C-A) – ACMG Classification: Likely_pathogenic (6 pts)

Variant summary

Our verdict is Likely pathogenic. The variant received 6 ACMG points: 6P and 0B. PM2PP3_Strong

The NM_005159.5(ACTC1):c.129G>T(p.Gln43His) variant causes a missense, splice region change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000685 in 1,459,104 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 2/3 splice prediction tools predicting alterations to normal splicing. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. Q43Q) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.9e-7 ( 0 hom. )

Consequence

ACTC1
NM_005159.5 missense, splice_region

Scores

Splicing: ADA: 1.000

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 7.57

Publications

0 publications found

Variant links:

Genes affected

ACTC1 (HGNC:143): (actin alpha cardiac muscle 1) Actins are highly conserved proteins that are involved in various types of cell motility. Polymerization of globular actin (G-actin) leads to a structural filament (F-actin) in the form of a two-stranded helix. Each actin can bind to four others. The protein encoded by this gene belongs to the actin family which is comprised of three main groups of actin isoforms, alpha, beta, and gamma. The alpha actins are found in muscle tissues and are a major constituent of the contractile apparatus. Defects in this gene have been associated with idiopathic dilated cardiomyopathy (IDC) and familial hypertrophic cardiomyopathy (FHC). [provided by RefSeq, Jul 2008]

ACTC1 links:

GJD2-DT (HGNC:55560): (GJD2 divergent transcript)

GJD2-DT links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_pathogenic. The variant received 6 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

Splicing predictors support a deleterious effect. Scorers claiming Pathogenic: dbscSNV1_ADA, dbscSNV1_RF. Scorers claiming Uncertain: max_spliceai. No scorers claiming Benign.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ACTC1	NM_005159.5 link	c.129G>T	p.Gln43His	missense_variant, splice_region_variant	Exon 2 of 7	ENST00000290378.6	NP_005150.1	P68032B3KPP5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ACTC1	ENST00000290378.6 link	c.129G>T	p.Gln43His	missense_variant, splice_region_variant	Exon 2 of 7	1	NM_005159.5	ENSP00000290378.4		P68032

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.85e-7

AC:

AN:

1459104

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

725672

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33444

American (AMR)

AF:

0.00

AC:

AN:

44600

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26036

East Asian (EAS)

AF:

0.00

AC:

AN:

39656

South Asian (SAS)

AF:

0.00

AC:

AN:

86102

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52580

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5756

European-Non Finnish (NFE)

AF:

9.00e-7

AC:

AN:

1110676

Other (OTH)

AF:

0.00

AC:

AN:

60254

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.425

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.77

CardioboostCm

Benign

0.059

BayesDel_addAF

Pathogenic

0.16

BayesDel_noAF

Uncertain

0.0

CADD

Pathogenic

(source)

DANN

Benign

0.96

DEOGEN2

Pathogenic

0.84

Eigen

Uncertain

0.31

Eigen_PC

Uncertain

0.37

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.92

M_CAP

Pathogenic

0.34

MetaRNN

Pathogenic

0.79

MetaSVM

Uncertain

0.42

MutationAssessor

Benign

1.3

PhyloP100

7.6

PrimateAI

Pathogenic

0.88

PROVEAN

Benign

-1.3

REVEL

Uncertain

0.60

Sift4G

Benign

0.11

Polyphen

0.40

Vest4

0.63

MutPred

0.83

Gain of methylation at R39 (P = 0.0626);

MVP

0.91

MPC

1.5

ClinPred

0.95

GERP RS

4.2

Varity_R

0.63

gMVP

0.90

Mutation Taster

=3/97

disease causing

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Pathogenic

1.0

dbscSNV1_RF

Pathogenic

1.0

SpliceAI score (max)

0.36

Details are displayed if max score is > 0.2

DS_DL_spliceai

0.36

Position offset: 0

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over