rs7232329

Variant names:

• chr18-3100431-G-A
• rs7232329
• NM_003803.4:c.3576-5C>T

Your query was ambiguous. Multiple possible variants found:

• chr18-3100431-G-A
• chr18-3100431-G-C
• chr18-3100431-G-T

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_Strong BP6_Very_Strong BA1

The NM_003803.4(MYOM1):​c.3576-5C>T variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.43 in 1,606,494 control chromosomes in the GnomAD database, including 152,167 homozygotes. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Benign (★★).

• Frequency:
  • Genomes: 𝑓 0.37 (11665 hom., cov: 31)
  • Exomes 𝑓: 0.44 (140502 hom.)
• Consequence: MYOM1 NM_003803.4 splice_region, intron
• Scores: Splicing: ADA: 0.00001161
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:5
• Conservation: PhyloP100: -0.0800

Genes affected

MYOM1 (HGNC:7613): (myomesin 1) The giant protein titin, together with its associated proteins, interconnects the major structure of sarcomeres, the M bands and Z discs. The C-terminal end of the titin string extends into the M line, where it binds tightly to M-band constituents of apparent molecular masses of 190 kD (myomesin 1) and 165 kD (myomesin 2). This protein, myomesin 1, like myomesin 2, titin, and other myofibrillar proteins contains structural modules with strong homology to either fibronectin type III (motif I) or immunoglobulin C2 (motif II) domains. Myomesin 1 and myomesin 2 each have a unique N-terminal region followed by 12 modules of motif I or motif II, in the arrangement II-II-I-I-I-I-I-II-II-II-II-II. The two proteins share 50% sequence identity in this repeat-containing region. The head structure formed by these 2 proteins on one end of the titin string extends into the center of the M band. The integrating structure of the sarcomere arises from muscle-specific members of the superfamily of immunoglobulin-like proteins. Alternatively spliced transcript variants encoding different isoforms have been identified. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Benign. Variant got -20 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.88).
• BP6: Variant 18-3100431-G-A is Benign according to our data. Variant chr18-3100431-G-A is described in ClinVar as [Benign]. Clinvar id is 226819.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BA1: GnomAd4 highest subpopulation (AMR) allele frequency at 95% confidence interval = 0.503 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MYOM1	NM_003803.4	c.3576-5C>T		splice_region_variant, intron_variant	Intron 23 of 37	ENST00000356443.9	NP_003794.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MYOM1	ENST00000356443.9	c.3576-5C>T		splice_region_variant, intron_variant	Intron 23 of 37	1	NM_003803.4	ENSP00000348821.4
MYOM1	ENST00000261606.11	c.3288-5C>T		splice_region_variant, intron_variant	Intron 22 of 36	1		ENSP00000261606.7

Frequencies

GnomAD3 genomes AF: 0.373 AC: 56617 AN: 151778 Hom.: 11659 Cov.: 31

Gnomad AFR AF: 0.193

Gnomad AMI AF: 0.434

Gnomad AMR AF: 0.512

Gnomad ASJ AF: 0.456

Gnomad EAS AF: 0.354

Gnomad SAS AF: 0.359

Gnomad FIN AF: 0.355

Gnomad MID AF: 0.465

Gnomad NFE AF: 0.449

Gnomad OTH AF: 0.445

GnomAD3 exomes AF: 0.427 AC: 104347 AN: 244570 Hom.: 23079 AF XY: 0.426 AC XY: 56459 AN XY: 132552

Gnomad AFR exome AF: 0.188

Gnomad AMR exome AF: 0.578

Gnomad ASJ exome AF: 0.463

Gnomad EAS exome AF: 0.360

Gnomad SAS exome AF: 0.376

Gnomad FIN exome AF: 0.355

Gnomad NFE exome AF: 0.446

Gnomad OTH exome AF: 0.454

GnomAD4 exome AF: 0.436 AC: 633726 AN: 1454598 Hom.: 140502 Cov.: 31 AF XY: 0.435 AC XY: 314661 AN XY: 723666

Gnomad4 AFR exome AF: 0.183

Gnomad4 AMR exome AF: 0.570

Gnomad4 ASJ exome AF: 0.454

Gnomad4 EAS exome AF: 0.345

Gnomad4 SAS exome AF: 0.377

Gnomad4 FIN exome AF: 0.357

Gnomad4 NFE exome AF: 0.449

Gnomad4 OTH exome AF: 0.429

GnomAD4 genome AF: 0.373 AC: 56644 AN: 151896 Hom.: 11665 Cov.: 31 AF XY: 0.370 AC XY: 27477 AN XY: 74204

Gnomad4 AFR AF: 0.193

Gnomad4 AMR AF: 0.512

Gnomad4 ASJ AF: 0.456

Gnomad4 EAS AF: 0.355

Gnomad4 SAS AF: 0.359

Gnomad4 FIN AF: 0.355

Gnomad4 NFE AF: 0.449

Gnomad4 OTH AF: 0.442

Alfa AF: 0.426 Hom.: 7979

Bravo AF: 0.379

Asia WGS AF: 0.356 AC: 1240 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:5

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Benign:2

-

Breakthrough Genomics, Breakthrough Genomics

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: not provided

- -

Jun 13, 2018

GeneDx

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

not specified Benign:1

Nov 24, 2014

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

3576-5C>T in intron 23 of MYOM1: This variant is not expected to have clinical s ignificance because it has been identified in 44.7% (3679/8230) of European Amer ican chromosomes from a broad population by the NHLBI Exome Sequencing Project ( http://evs.gs.washington.edu/EVS; dbSNP rs7232329). -

Hypertrophic cardiomyopathy Benign:1

Feb 03, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Cardiovascular phenotype Benign:1

Jul 11, 2012

Ambry Genetics

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This alteration is classified as benign based on a combination of the following: population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.88
CADD	Benign	3.4
DANN	Benign	0.31

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.000012
dbscSNV1_RF	Benign	0.0
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

LitVar

Other links and lift over

dbSNP: rs7232329; hg19: chr18-3100429;