1-229431913-C-CGG

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -1 ACMG points: 0P and 1B. BP6

The NM_001100.4(ACTA1):c.809-13_809-12dupCC variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000226 in 1,611,414 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.000073 ( 0 hom., cov: 29)

Exomes 𝑓: 0.00024 ( 0 hom. )

Consequence

ACTA1
NM_001100.4 intron

Scores

Not classified

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:3B:1

Conservation

PhyloP100: 0.306

Publications

3 publications found

Variant links:

Genes affected

ACTA1 (HGNC:129): (actin alpha 1, skeletal muscle) The product encoded by this gene belongs to the actin family of proteins, which are highly conserved proteins that play a role in cell motility, structure and integrity. Alpha, beta and gamma actin isoforms have been identified, with alpha actins being a major constituent of the contractile apparatus, while beta and gamma actins are involved in the regulation of cell motility. This actin is an alpha actin that is found in skeletal muscle. Mutations in this gene cause a variety of myopathies, including nemaline myopathy, congenital myopathy with excess of thin myofilaments, congenital myopathy with cores, and congenital myopathy with fiber-type disproportion, diseases that lead to muscle fiber defects with manifestations such as hypotonia. [provided by RefSeq, Sep 2019]

ACTA1 Gene-Disease associations (from GenCC):

alpha-actinopathy
Inheritance: AD, AR, SD Classification: DEFINITIVE Submitted by: ClinGen
congenital myopathy 2a, typical, autosomal dominant
Inheritance: AR, SD, AD Classification: DEFINITIVE, STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae), Ambry Genetics
congenital myopathy with excess of thin filaments
Inheritance: SD Classification: DEFINITIVE Submitted by: Illumina
congenital myopathy 2c, severe infantile, autosomal dominant
Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
childhood-onset nemaline myopathy
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
congenital fiber-type disproportion myopathy
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
intermediate nemaline myopathy
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
progressive scapulohumeroperoneal distal myopathy
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
typical nemaline myopathy
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
rigid spine syndrome
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
severe congenital nemaline myopathy
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
zebra body myopathy
Inheritance: Unknown Classification: SUPPORTIVE Submitted by: Orphanet
hypertrophic cardiomyopathy
Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

ACTA1 links:

ENSG00000290037 (HGNC:):

ENSG00000290037 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -1 ACMG points.

BP6

Variant 1-229431913-C-CGG is Benign according to our data. Variant chr1-229431913-C-CGG is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 296053.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001100.4. 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
	ACTA1	NM_001100.4	MANE Select	c.809-13_809-12dupCC		intron	N/A	NP_001091.1	P68133

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein	UniProt
ACTA1	ENST00000366684.7	TSL:1 MANE Select	c.809-12_809-11insCC	intron	N/A	ENSP00000355645.3	P68133
ACTA1	ENST00000871224.1		c.809-12_809-11insCC	intron	N/A	ENSP00000541283.1
ACTA1	ENST00000871225.1		c.809-12_809-11insCC	intron	N/A	ENSP00000541284.1

Frequencies

GnomAD3 genomes

AF:

0.0000726

AC:

AN:

151582

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000487

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000118

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000780

AC:

AN:

230878

AF XY:

0.0000717

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000310

Gnomad ASJ exome

AF:

0.000110

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000126

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000242

AC:

353

AN:

1459832

Hom.:

Cov.:

AF XY:

0.000249

AC XY:

181

AN XY:

725950

show subpopulations

African (AFR)

AF:

0.0000898

AC:

AN:

33408

American (AMR)

AF:

0.0000448

AC:

AN:

44652

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26070

East Asian (EAS)

AF:

0.00

AC:

AN:

39644

South Asian (SAS)

AF:

0.0000232

AC:

AN:

86214

European-Finnish (FIN)

AF:

0.0000376

AC:

AN:

53128

Middle Eastern (MID)

AF:

0.000177

AC:

AN:

5646

European-Non Finnish (NFE)

AF:

0.000290

AC:

322

AN:

1110818

Other (OTH)

AF:

0.000349

AC:

AN:

60252

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.404

Heterozygous variant carriers

101

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

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:

0.0000726

AC:

AN:

151582

Hom.:

Cov.:

AF XY:

0.0000540

AC XY:

AN XY:

74022

show subpopulations

African (AFR)

AF:

0.0000487

AC:

AN:

41066

American (AMR)

AF:

0.00

AC:

AN:

15238

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5140

South Asian (SAS)

AF:

0.000207

AC:

AN:

4824

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10592

Middle Eastern (MID)

AF:

0.00

AC:

AN:

314

European-Non Finnish (NFE)

AF:

0.000118

AC:

AN:

67942

Other (OTH)

AF:

0.00

AC:

AN:

2084

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.402

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:

0.000363

Hom.:

214

ClinVar

ClinVar submissions

Significance:Conflicting classifications of pathogenicity

Revision:criteria provided, conflicting classifications

View on ClinVar

Pathogenic

VUS

Benign

Condition

Actin accumulation myopathy (1)

Congenital myopathy with fiber type disproportion (1)

Familial restrictive cardiomyopathy (1)

Nemaline myopathy (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

PhyloP100

0.31

Splicing

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

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over