U.S. flag

An official website of the United States government

NM_001100.4(ACTA1):c.808G>A (p.Gly270Ser) AND Actin accumulation myopathy

Germline classification:
Pathogenic (1 submission)
Last evaluated:
Nov 3, 2022
Review status:
1 star out of maximum of 4 stars
criteria provided, single submitter
Somatic classification
of clinical impact:
None
Review status:
(0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided
Somatic classification
of oncogenicity:
None
Review status:
(0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided
Record status:
current
Accession:
RCV003518738.2

Allele description [Variation Report for NM_001100.4(ACTA1):c.808G>A (p.Gly270Ser)]

NM_001100.4(ACTA1):c.808G>A (p.Gly270Ser)

Gene:
ACTA1:actin alpha 1, skeletal muscle [Gene - OMIM - HGNC]
Variant type:
single nucleotide variant
Cytogenetic location:
1q42.13
Genomic location:
Preferred name:
NM_001100.4(ACTA1):c.808G>A (p.Gly270Ser)
HGVS:
  • NC_000001.11:g.229431994C>T
  • NG_006672.1:g.7103G>A
  • NG_093760.1:g.379C>T
  • NM_001100.4:c.808G>AMANE SELECT
  • NP_001091.1:p.Gly270Ser
  • NP_001091.1:p.Gly270Ser
  • LRG_429t1:c.808G>A
  • LRG_429:g.7103G>A
  • LRG_429p1:p.Gly270Ser
  • NC_000001.10:g.229567741C>T
  • NM_001100.3:c.808G>A
Protein change:
G270S
Molecular consequence:
  • NM_001100.4:c.808G>A - missense variant - [Sequence Ontology: SO:0001583]

Condition(s)

Name:
Actin accumulation myopathy (CMYO2A)
Synonyms:
Nemaline myopathy caused by mutation in the alpha-actin gene; CONGENITAL MYOPATHY 2A, TYPICAL, AUTOSOMAL DOMINANT; Myopathy, actin, congenital, with cores; See all synonyms [MedGen]
Identifiers:
MONDO: MONDO:0008070; MedGen: C3711389; OMIM: 161800

Recent activity

Your browsing activity is empty.

Activity recording is turned off.

Turn recording back on

See more...

Assertion and evidence details

Submission AccessionSubmitterReview Status
(Assertion method)
Clinical Significance
(Last evaluated)
OriginMethodCitations
SCV004292981Labcorp Genetics (formerly Invitae), Labcorp
criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))
Pathogenic
(Nov 3, 2022)
germlineclinical testing

PubMed (8)
[See all records that cite these PMIDs]

Summary from all submissions

EthnicityOriginAffectedIndividualsFamiliesChromosomes testedNumber TestedFamily historyMethod
not providedgermlineunknownnot providednot providednot providednot providednot providedclinical testing

Citations

PubMed

Aberrant 5' splice sites in human disease genes: mutation pattern, nucleotide structure and comparison of computational tools that predict their utilization.

Buratti E, Chivers M, Královicová J, Romano M, Baralle M, Krainer AR, Vorechovsky I.

Nucleic Acids Res. 2007;35(13):4250-63. Epub 2007 Jun 18.

PubMed [citation]
PMID:
17576681
PMCID:
PMC1934990

Statistical features of human exons and their flanking regions.

Zhang MQ.

Hum Mol Genet. 1998 May;7(5):919-32.

PubMed [citation]
PMID:
9536098
See all PubMed Citations (8)

Details of each submission

From Labcorp Genetics (formerly Invitae), Labcorp, SCV004292981.1

#EthnicityIndividualsChromosomes TestedFamily HistoryMethodCitations
1not providednot providednot providednot providedclinical testing PubMed (8)

Description

Variants that disrupt the consensus splice site are a relatively common cause of aberrant splicing (PMID: 17576681, 9536098). For these reasons, this variant has been classified as Pathogenic. This variant disrupts the c.808G nucleotide in the ACTA1 gene. Other variant(s) that disrupt this nucleotide have been determined to be pathogenic (PMID: 12921789, 15226407, 21514153). This suggests that this nucleotide is clinically significant, and that variants that disrupt this position are likely to be disease-causing. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be disruptive. This variant is also known as G268S. This missense change has been observed in individual(s) with autosomal dominant nemaline myopathy and/or clinical features of nemaline myopathy (PMID: 15138616, 19562689). In at least one individual the variant was observed to be de novo. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces glycine, which is neutral and non-polar, with serine, which is neutral and polar, at codon 270 of the ACTA1 protein (p.Gly270Ser). This variant also falls at the last nucleotide of exon 5, which is part of the consensus splice site for this exon.

#SampleMethodObservation
OriginAffectedNumber testedTissuePurposeMethodIndividualsAllele frequencyFamiliesCo-occurrences
1germlineunknownnot providednot providednot providednot providednot providednot providednot provided

Last Updated: Sep 29, 2024