NM_000257.4(MYH7):c.4645-1G>C AND Cardiovascular phenotype

Germline classification:: Uncertain significance (1 submission)
Last evaluated:: Jul 19, 2023
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:: RCV003380073.2

Allele description [Variation Report for NM_000257.4(MYH7):c.4645-1G>C]

NM_000257.4(MYH7):c.4645-1G>C

Genes:

LOC126861897:BRD4-independent group 4 enhancer GRCh37_chr14:23884455-23885654 [Gene]
MYH7:myosin heavy chain 7 [Gene - OMIM - HGNC]
MHRT:myosin heavy chain associated RNA transcript [Gene - OMIM - HGNC]

Variant type:

single nucleotide variant

Cytogenetic location:

14q11.2

Genomic location:

Preferred name:

NM_000257.4(MYH7):c.4645-1G>C

HGVS:

NC_000014.9:g.23416313C>G
NG_007884.1:g.24349G>C
NG_086395.1:g.1168C>G
NM_000257.4:c.4645-1G>CMANE SELECT
NM_001407004.1:c.4645-1G>C
LRG_384:g.24349G>C
NC_000014.8:g.23885522C>G

Molecular consequence:

NM_000257.4:c.4645-1G>C - splice acceptor variant - [Sequence Ontology: SO:0001574]
NM_001407004.1:c.4645-1G>C - splice acceptor variant - [Sequence Ontology: SO:0001574]

Condition(s)

Name:: Cardiovascular phenotype
Identifiers:: MedGen: CN230736

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV004096143	Ambry Genetics	criteria provided, single submitter (Ambry Variant Classification Scheme 2023)	Uncertain significance (Jul 19, 2023)	germline	clinical testing	Citation Link

Submission Accession

Submitter

Review Status
(Assertion method)

Clinical Significance
(Last evaluated)

Origin

Method

Citations

SCV004096143

Ambry Genetics

criteria provided, single submitter

(Ambry Variant Classification Scheme 2023)

Uncertain significance
(Jul 19, 2023)

germline

clinical testing

Citation Link

Help

Summary from all submissions

Ethnicity	Origin	Affected	Individuals	Families	Chromosomes tested	Number Tested	Family history	Method
not provided	germline	unknown	not provided	not provided	not provided	not provided	not provided	clinical testing

Details of each submission

From Ambry Genetics, SCV004096143.2

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	not provided

Description

The c.4645-1G>C intronic variant results from a G to C substitution one nucleotide before coding exon 32 of the MYH7 gene. This nucleotide position is highly conserved in available vertebrate species. In silico splice site analysis predicts that this alteration will weaken the native splice acceptor site and will result in the creation or strengthening of a novel splice acceptor site. Alterations that disrupt the canonical splice site are expected to cause aberrant splicing, resulting in an abnormal protein or a transcript that is subject to nonsense-mediated mRNA decay. However, loss of function of MYH7 has not been established as a mechanism of disease. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear.

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	unknown	not provided	not provided	not provided		not provided	not provided	not provided	not provided

Last Updated: May 1, 2024

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