dbSNP rs143978597: ACTG1:p.Ala138Ala (chr17-81511576-G-A) – ACMG Classification: Benign (-21 pts)

Variant summary

Our verdict is Benign. The variant received -21 ACMG points: 0P and 21B. BP4_StrongBP6_Very_StrongBP7BS1BS2

The NM_001614.5(ACTG1):c.414C>T(p.Ala138Ala) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000439 in 1,613,820 control chromosomes in the GnomAD database, including 7 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Synonymous variant affecting the same amino acid position (i.e. A138A) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.00053 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00043 ( 7 hom. )

Consequence

ACTG1
NM_001614.5 synonymous

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:9

Conservation

PhyloP100: -4.39

Publications

3 publications found

Variant links:

Genes affected

ACTG1 (HGNC:144): (actin gamma 1) Actins are highly conserved proteins that are involved in various types of cell motility and in maintenance of the cytoskeleton. Three main groups of actin isoforms have been identified in vertebrate animals: alpha, beta, and gamma. The alpha actins are found in muscle tissues and are a major constituent of the contractile apparatus. The beta and gamma actins co-exist in most cell types as components of the cytoskeleton and as mediators of internal cell motility. Actin gamma 1, encoded by this gene, is a cytoplasmic actin found in all cell types. Mutations in this gene are associated with DFNA20/26, a subtype of autosomal dominant non-syndromic sensorineural progressive hearing loss and also with Baraitser-Winter syndrome. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jul 2017]

ACTG1 Gene-Disease associations (from GenCC):

Baraitser-winter syndrome 2
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: ClinGen, G2P, Labcorp Genetics (formerly Invitae)
nonsyndromic genetic hearing loss
Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
autosomal dominant nonsyndromic hearing loss 20
Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
autosomal dominant nonsyndromic hearing loss
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
Baraitser-Winter cerebrofrontofacial syndrome
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACTG1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -21 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.8).

BP6

Variant 17-81511576-G-A is Benign according to our data. Variant chr17-81511576-G-A is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 128271.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=-4.39 with no splicing effect.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.000525 (80/152378) while in subpopulation AFR AF = 0.000649 (27/41592). AF 95% confidence interval is 0.000458. There are 0 homozygotes in GnomAd4. There are 36 alleles in the male GnomAd4 subpopulation. Median coverage is 33. This position passed quality control check.

BS2

High AC in GnomAd4 at 80 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001614.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
ACTG1	NM_001614.5	MANE Select	c.414C>T	p.Ala138Ala	synonymous	Exon 4 of 6	NP_001605.1	P63261
ACTG1	NM_001199954.3		c.414C>T	p.Ala138Ala	synonymous	Exon 4 of 6	NP_001186883.1	P63261
ACTG1	NR_037688.3		n.486C>T		non_coding_transcript_exon	Exon 4 of 7

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
ACTG1	ENST00000573283.7	TSL:5 MANE Select	c.414C>T	p.Ala138Ala	synonymous	Exon 4 of 6	ENSP00000458435.1	P63261
ACTG1	ENST00000575842.5	TSL:1	c.414C>T	p.Ala138Ala	synonymous	Exon 3 of 5	ENSP00000458162.1	P63261
ACTG1	ENST00000615544.5	TSL:1	c.414C>T	p.Ala138Ala	synonymous	Exon 4 of 6	ENSP00000477968.1	P63261

Frequencies

GnomAD3 genomes

AF:

0.000532

AC:

AN:

152260

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000651

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000327

Gnomad ASJ

AF:

0.00202

Gnomad EAS

AF:

0.000192

Gnomad SAS

AF:

0.000621

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.0158

Gnomad NFE

AF:

0.000411

Gnomad OTH

AF:

0.00239

GnomAD2 exomes

AF:

0.000559

AC:

140

AN:

250458

AF XY:

0.000627

show subpopulations

Gnomad AFR exome

AF:

0.000437

Gnomad AMR exome

AF:

0.000202

Gnomad ASJ exome

AF:

0.00219

Gnomad EAS exome

AF:

0.000163

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000513

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.000430

AC:

629

AN:

1461442

Hom.:

Cov.:

AF XY:

0.000476

AC XY:

346

AN XY:

727018

show subpopulations

African (AFR)

AF:

0.000627

AC:

AN:

33476

American (AMR)

AF:

0.000447

AC:

AN:

44720

Ashkenazi Jewish (ASJ)

AF:

0.00191

AC:

AN:

26136

East Asian (EAS)

AF:

0.0000504

AC:

AN:

39700

South Asian (SAS)

AF:

0.00132

AC:

114

AN:

86256

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53022

Middle Eastern (MID)

AF:

0.0184

AC:

106

AN:

5768

European-Non Finnish (NFE)

AF:

0.000247

AC:

275

AN:

1111976

Other (OTH)

AF:

0.000679

AC:

AN:

60388

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.490

Heterozygous variant carriers

121

161

201

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

100

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.000525

AC:

AN:

152378

Hom.:

Cov.:

AF XY:

0.000483

AC XY:

AN XY:

74518

show subpopulations

African (AFR)

AF:

0.000649

AC:

AN:

41592

American (AMR)

AF:

0.000327

AC:

AN:

15308

Ashkenazi Jewish (ASJ)

AF:

0.00202

AC:

AN:

3472

East Asian (EAS)

AF:

0.000193

AC:

AN:

5186

South Asian (SAS)

AF:

0.000621

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10628

Middle Eastern (MID)

AF:

0.0136

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000412

AC:

AN:

68042

Other (OTH)

AF:

0.00236

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.505

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000359

Hom.:

Bravo

AF:

0.000544

Asia WGS

AF:

0.000577

AC:

AN:

3478

EpiCase

AF:

0.000709

EpiControl

AF:

0.000889

ClinVar

ClinVar submissions

Significance:Benign/Likely benign

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

not provided (3)

not specified (2)

ACTG1-related disorder (1)

Autosomal dominant nonsyndromic hearing loss 20 (1)

Autosomal dominant nonsyndromic hearing loss 20;C3281235:Baraitser-winter syndrome 2 (1)

Baraitser-winter syndrome 2 (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.082

BayesDel_noAF

Benign

-0.80

CADD

Benign

6.1

(source)

DANN

Benign

0.91

PhyloP100

-4.4

Mutation Taster

=100/0

polymorphism

(source)

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over