Genetic Variant ACTN3:p.Arg48Gln (chr11-66547080-G-A) – 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_001104.4(ACTN3):c.143G>A(p.Arg48Gln) variant causes a missense change. The variant allele was found at a frequency of 0.000085 in 1,505,064 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000093 ( 0 hom. )

Consequence

ACTN3
NM_001104.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 7.17

Publications

0 publications found

Variant links:

Genes affected

ACTN3 (HGNC:165): (actinin alpha 3) This gene encodes a member of the alpha-actin binding protein gene family. The encoded protein is primarily expressed in skeletal muscle and functions as a structural component of sarcomeric Z line. This protein is involved in crosslinking actin containing thin filaments. An allelic polymorphism in this gene results in both coding and non-coding variants; the reference genome represents the coding allele. The non-functional allele of this gene is associated with elite athlete status. [provided by RefSeq, Feb 2014]

ACTN3 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
ACTN3	NM_001104.4 link	c.143G>A	p.Arg48Gln	missense_variant	Exon 1 of 21	ENST00000513398.2	NP_001095.2	Q08043B4DZQ2
ACTN3	NM_001258371.3 link	c.276+294G>A		intron_variant	Intron 1 of 20		NP_001245300.2	Q08043A0A087WSZ2B4DZQ2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
ACTN3	ENST00000513398.2 link	c.143G>A	p.Arg48Gln	missense_variant	Exon 1 of 21	1	NM_001104.4	ENSP00000426797.1	Q08043
ACTN3	ENST00000511191.1 link	n.143G>A		non_coding_transcript_exon_variant	Exon 1 of 5	5		ENSP00000426236.1	D6RH00
ACTN3	ENST00000502692.5 link	c.276+294G>A		intron_variant	Intron 1 of 20	2		ENSP00000422007.1	A0A087WSZ2

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152238

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000128

AC:

AN:

156410

AF XY:

0.0000121

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000262

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000931

AC:

126

AN:

1352826

Hom.:

Cov.:

AF XY:

0.0000968

AC XY:

AN XY:

661424

show subpopulations

African (AFR)

AF:

0.0000334

AC:

AN:

29898

American (AMR)

AF:

0.00

AC:

AN:

27476

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

19562

East Asian (EAS)

AF:

0.00

AC:

AN:

38230

South Asian (SAS)

AF:

0.00

AC:

AN:

67990

European-Finnish (FIN)

AF:

0.00

AC:

AN:

48660

Middle Eastern (MID)

AF:

0.00

AC:

AN:

3846

European-Non Finnish (NFE)

AF:

0.000115

AC:

122

AN:

1061708

Other (OTH)

AF:

0.0000541

AC:

AN:

55456

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.478

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152238

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74382

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41462

American (AMR)

AF:

0.00

AC:

AN:

15288

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5200

South Asian (SAS)

AF:

0.00

AC:

AN:

4838

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10630

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.0000294

AC:

AN:

68030

Other (OTH)

AF:

0.00

AC:

AN:

2092

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.0000658

Hom.:

Bravo

AF:

0.0000189

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.000259

AC:

ExAC

AF:

0.0000259

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Feb 14, 2023

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.143G>A (p.R48Q) alteration is located in exon 1 (coding exon 1) of the ACTN3 gene. This alteration results from a G to A substitution at nucleotide position 143, causing the arginine (R) at amino acid position 48 to be replaced by a glutamine (Q). 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

Benign

0.27

BayesDel_addAF

Pathogenic

0.21

BayesDel_noAF

Uncertain

0.060

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.74

FATHMM_MKL

Uncertain

0.97

LIST_S2

Pathogenic

0.98

MetaRNN

Uncertain

0.58

PhyloP100

7.2

Sift4G

Benign

0.20

Polyphen

0.76

Vest4

0.56

MVP

0.59

GERP RS

3.7

PromoterAI

-0.073

Neutral

(source)

Varity_R

0.33

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

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11-66547080-G-A

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over