VCV001929488.4 - ClinVar

NM_017534.6(MYH2):c.5673+4_5673+7del

Germline

Classification

The aggregate germline classification for this variant, typically for a monogenic or Mendelian disorder as in the ACMG/AMP guidelines, or for response to a drug. This value is calculated by NCBI based on data from submitters. Read our rules for calculating the aggregate classification.

(2)

Stars represent the aggregate review status, or the level of review supporting the aggregate germline classification for this VCV record. This value is calculated by NCBI based on data from submitters. Read our rules for calculating the review status. The number of submissions which contribute to this review status is shown in parentheses.

Uncertain significance

criteria provided, multiple submitters, no conflicts

Somatic

No data submitted for somatic clinical impact

Somatic

No data submitted for oncogenicity

Variant Details

Identifiers

NM_017534.6(MYH2):c.5673+4_5673+7del

Variation ID: 1929488 Accession: VCV001929488.4

Type and length

Deletion, 4 bp

Location

Cytogenetic: 17p13.1 17: 10523083-10523086 (GRCh38) [ NCBI UCSC ] 17: 10426400-10426403 (GRCh37) [ NCBI UCSC ]

Timeline in ClinVar

	First in ClinVar Help The date this variant first appeared in ClinVar with each type of classification.	Last submission Help The date of the most recent submission for each type of classification for this variant.	Last evaluated Help The most recent date that a submitter evaluated this variant for each type of classification.
Germline	Feb 7, 2023	Feb 28, 2024	Mar 18, 2023

HGVS

Nucleotide	Protein	Molecular consequence
NM_017534.6:c.5673+4_5673+7del MANE Select Help Transcripts from the Matched Annotation from the NCBI and EMBL-EBI (MANE) collaboration.		splice donor
NM_001100112.2:c.5673+4_5673+7del		splice donor
NC_000017.11:g.10523086_10523089del
NC_000017.10:g.10426403_10426406del
NG_013014.1:g.31615_31618del

... more HGVS ... less HGVS

Protein change

Other names

Canonical SPDI

NC_000017.11:10523082:TACTTAC:TAC

Functional consequence Help The effect of the variant on RNA or protein function, based on experimental evidence from submitters.

Global minor allele frequency (GMAF) Help The global minor allele frequency calculated by the 1000 Genomes Project. The minor allele at this location is indicated in parentheses and may be different from the allele represented by this VCV record.

Allele frequency Help The frequency of the allele represented by this VCV record.

Links

VarSome

Genes

Gene	OMIM	ClinGen Gene Dosage Sensitivity Curation		Variation Viewer Help Links to Variation Viewer, a genome browser to view variation data from NCBI databases.	Related variants
Gene	OMIM	HI score Help The haploinsufficiency score for the gene, curated by ClinGen’s Dosage Sensitivity Curation task team.	TS score Help The triplosensitivity score for the gene, curated by ClinGen’s Dosage Sensitivity Curation task team.		Within gene Help The number of variants in ClinVar that are contained within this gene, with a link to view the list of variants.	All Help The number of variants in ClinVar for this gene, including smaller variants within the gene and larger CNVs that overlap or fully contain the gene.
MYH2		-	-	GRCh38 GRCh37	16	1379
MYHAS	-	-	-	GRCh38	-	2031

Conditions - Germline

Condition Help The condition for this variant-condition (RCV) record in ClinVar.	Classification Help The aggregate germline classification for this variant-condition (RCV) record in ClinVar. The number of submissions that contribute to this aggregate classification is shown in parentheses. (# of submissions)	Review status Help The aggregate review status for this variant-condition (RCV) record in ClinVar. This value is calculated by NCBI based on data from submitters. Read our rules for calculating the review status.	Last evaluated Help The most recent date that a submitter evaluated this variant for the condition.	Variation/condition record Help The RCV accession number, with most recent version number, for the variant-condition record, with a link to the RCV web page.
Myopathy, proximal, and ophthalmoplegia	Uncertain significance (2)	criteria provided, multiple submitters, no conflicts	Mar 18, 2023	RCV002642386.4

Submissions - Germline

Classification Help The submitted germline classification for each SCV record. (Last evaluated)	Review status Help Stars represent the review status, or the level of review supporting the submitted (SCV) record. This value is calculated by NCBI based on data from the submitter. Read our rules for calculating the review status. This column also includes a link to the submitter’s assertion criteria if provided, and the collection method. (Assertion criteria)	Condition Help The condition for the classification, provided by the submitter for this submitted (SCV) record. This column also includes the affected status and allele origin of individuals observed with this variant.	Submitter Help The submitting organization for this submitted (SCV) record. This column also includes the SCV accession and version number, the date this SCV first appeared in ClinVar, and the date that this SCV was last updated in ClinVar.	More information Help This column includes more information supporting the classification, including citations, the comment on classification, and detailed evidence provided as observations of the variant by the submitter.
Uncertain significance (-)	criteria provided, single submitter (ACMG Guidelines, 2015) Method: clinical testing	Myopathy, proximal, and ophthalmoplegia Affected status: yes Allele origin: unknown	3billion Accession: SCV004013820.1 First in ClinVar: Jul 22, 2023 Last updated: Jul 22, 2023	Comment: The variant is not observed in the gnomAD v2.1.1 dataset. Intron variant. In silico tools predict the variant to alter splicing and produce an abnormal … (more) The variant is not observed in the gnomAD v2.1.1 dataset. Intron variant. In silico tools predict the variant to alter splicing and produce an abnormal transcript (SpliceAI: 1.00). Therefore, this variant is classified as Uncertain significance according to the recommendation of ACMG/AMP guideline. (less) Number of individuals with the variant: 2 Clinical Features: Weakness of facial musculature (present) , Impaired oropharyngeal swallow response (present) , Oral-pharyngeal dysphagia (present) , Generalized muscle weakness (present) , Proximal muscle weakness (present) … (more) Weakness of facial musculature (present) , Impaired oropharyngeal swallow response (present) , Oral-pharyngeal dysphagia (present) , Generalized muscle weakness (present) , Proximal muscle weakness (present) , Difficulty running (present) , Difficulty climbing stairs (present) , Scapular winging (present) (less)
Uncertain significance (Mar 18, 2023)	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015)) Method: clinical testing	Myopathy, proximal, and ophthalmoplegia Affected status: unknown Allele origin: germline	Labcorp Genetics (formerly Invitae), Labcorp Accession: SCV002961435.2 First in ClinVar: Feb 07, 2023 Last updated: Feb 28, 2024	Publications: PubMed (3) PubMed: 31127727‚ 17576681‚ 9536098 Comment: ClinVar contains an entry for this variant (Variation ID: 1929488). This variant has been observed in individual(s) with limb-girdle muscular dystrophy (PMID: 31127727). This variant … (more) ClinVar contains an entry for this variant (Variation ID: 1929488). This variant has been observed in individual(s) with limb-girdle muscular dystrophy (PMID: 31127727). This variant is not present in population databases (gnomAD no frequency). This sequence change falls in intron 39 of the MYH2 gene. It does not directly change the encoded amino acid sequence of the MYH2 protein. It affects a nucleotide within the consensus splice site. Variants that disrupt the consensus splice site are a relatively common cause of aberrant splicing (PMID: 17576681, 9536098). Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may disrupt the consensus splice site. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. (less)

Comment:

The variant is not observed in the gnomAD v2.1.1 dataset. Intron variant. In silico tools predict the variant to alter splicing and produce an abnormal transcript (SpliceAI: 1.00). Therefore, this variant is classified as Uncertain significance according to the recommendation of ACMG/AMP guideline.

Comment:

ClinVar contains an entry for this variant (Variation ID: 1929488). This variant has been observed in individual(s) with limb-girdle muscular dystrophy (PMID: 31127727). This variant is not present in population databases (gnomAD no frequency). This sequence change falls in intron 39 of the MYH2 gene. It does not directly change the encoded amino acid sequence of the MYH2 protein. It affects a nucleotide within the consensus splice site. Variants that disrupt the consensus splice site are a relatively common cause of aberrant splicing (PMID: 17576681, 9536098). Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may disrupt the consensus splice site. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance.

Germline Functional Evidence

There is no functional evidence in ClinVar for this variation. If you have generated functional data for this variation, please consider submitting that data to ClinVar.

Comment:

Citations for germline classification of this variant

Title	Author	Journal	Year	Link
Panel-Based Exome Sequencing for Neuromuscular Disorders as a Diagnostic Service.	Westra D	Journal of neuromuscular diseases	2019	PMID: 31127727
Aberrant 5' splice sites in human disease genes: mutation pattern, nucleotide structure and comparison of computational tools that predict their utilization.	Buratti E	Nucleic acids research	2007	PMID: 17576681
Statistical features of human exons and their flanking regions.	Zhang MQ	Human molecular genetics	1998	PMID: 9536098

Text-mined citations for this variant ...

Record last updated Sep 29, 2024

ClinVar Genomic variation as it relates to human health

NM_017534.6(MYH2):c.5673+4_5673+7del

Variant Details

Genes

Conditions - Germline

Submissions - Germline

Germline Functional Evidence

Citations for germline classification of this variant

Text-mined citations for this variant ...